Wednesday, June 3, 2015
Tuesday, May 19, 2015
Renal donors and future pregnancy https://t.co/tdlhctBXY4— Amit Langote (@LangoteAmit) May 18, 2015
Therapeutic advantage of combination antihypertensive drug therapy using amlodipine & irbesartan in hypertensive pts http://t.co/ykZt7BEeK7— Am Soc Ped Nephrol (@ASPNeph) May 18, 2015
Haematuria as a risk factor for chronic kidney disease progression in glomerular diseases: A review http://t.co/Ypi4BLJjyR— Am Soc Ped Nephrol (@ASPNeph) May 18, 2015
Successful therapy of C3Nef-positive C3 glomerulopathy with plasma therapy and immunosuppression http://t.co/w3tj8MUeOc— Am Soc Ped Nephrol (@ASPNeph) May 18, 2015
What are the latest trends in vascular access for dialysis? Dr. Ron Pisoni discusses the latest data here https://t.co/8ZtQM7n6Bk— DOPPS (@DOPPStudy) May 18, 2015
Role of therapeutic plasmapheresis in ANCA-associated vasculitis http://t.co/8Z4PXuKjlR— Am Soc Ped Nephrol (@ASPNeph) May 18, 2015
Friday, May 15, 2015
#DabigatranOverdose- Urgent Management; Serious power of Twitter! @caioqualunque @edgarvlermamd @LangoteAmit @hswapnil @HekmagsMD @nephondemand
@docthahir off-label use, no definitive evidence, only anecdotal experience. PCC would work as a thrombin substitution therapy.— Fra Ian (@caioqualunque) May 15, 2015
Thursday, May 14, 2015
Diabetes-related end-stage renal disease in Austria 1965–2013 http://t.co/0ciUPqJ2Qt— Am Soc Ped Nephrol (@ASPNeph) May 14, 2015
Low Vit D and High Fibroblast Growth Factor 23 Serum Levels Asso w/ Infectious & Cardiac Deaths in the HEMO Study http://t.co/lcbs2h3nAv— Am Soc Ped Nephrol (@ASPNeph) May 14, 2015
Transplant-Related Costs Incurred by Living Kidney Donors - RUN http://t.co/kYbebliMc5— Am Soc Ped Nephrol (@ASPNeph) May 14, 2015
The Renin-Angiotensin and Renal Dopaminergic Systems Interact in Normotensive Humans http://t.co/bEczQ0dh0y— Am Soc Ped Nephrol (@ASPNeph) May 14, 2015
Renal function can be impaired in children with primary hyperoxaluria type 3 http://t.co/oTXO754xcO— Am Soc Ped Nephrol (@ASPNeph) May 14, 2015
Measuring GFR in the ICU: Best Practices? http://t.co/bGQ6SZZ9QQ— Medscape Kidney (@MedscapeKidney) May 14, 2015
Friday, March 13, 2015
Effects of oral tolvaptan in patients hospitalized for worsening heart failure: the EVEREST Outcome Trial.
Konstam MA(1), Gheorghiade M, Burnett JC Jr, Grinfeld L, Maggioni AP, Swedberg K,
Udelson JE, Zannad F, Cook T, Ouyang J, Zimmer C, Orlandi C; Efficacy of
Vasopressin Antagonism in Heart Failure Outcome Study With Tolvaptan (EVEREST)
(1)Division of Cardiology, Tufts-New England Medical Center, Boston, Mass, USA.
Curr Cardiol Rep. 2008 May;10(3):166-7.
JAMA. 2007 Mar 28;297(12):1374-6.
Curr Heart Fail Rep. 2009 Mar;6(1):3-4.
CONTEXT: Vasopressin mediates fluid retention in heart failure. Tolvaptan, a
vasopressin V2 receptor blocker, shows promise for management of heart failure.
OBJECTIVE: To investigate the effects of tolvaptan initiated in patients
hospitalized with heart failure.
DESIGN, SETTING, AND PARTICIPANTS: The Efficacy of Vasopressin Antagonism in
Heart Failure Outcome Study With Tolvaptan (EVEREST), an event-driven,
randomized, double-blind, placebo-controlled study. The outcome trial comprised
4133 patients within 2 short-term clinical status studies, who were hospitalized
with heart failure, randomized at 359 North American, South American, and
European sites between October 7, 2003, and February 3, 2006, and followed up
during long-term treatment.
INTERVENTION: Within 48 hours of admission, patients were randomly assigned to
receive oral tolvaptan, 30 mg once per day (n = 2072), or placebo (n = 2061) for
a minimum of 60 days, in addition to standard therapy.
MAIN OUTCOME MEASURES: Dual primary end points were all-cause mortality
(superiority and noninferiority) and cardiovascular death or hospitalization for
heart failure (superiority only). Secondary end points included changes in
dyspnea, body weight, and edema.
RESULTS: During a median follow-up of 9.9 months, 537 patients (25.9%) in the
tolvaptan group and 543 (26.3%) in the placebo group died (hazard ratio, 0.98;
95% confidence interval [CI], 0.87-1.11; P = .68). The upper confidence limit for
the mortality difference was within the prespecified noninferiority margin of
1.25 (P<.001). The composite of cardiovascular death or hospitalization for heart
failure occurred in 871 tolvaptan group patients (42.0%) and 829 placebo group
patients (40.2%; hazard ratio, 1.04; 95% CI, 0.95-1.14; P = .55). Secondary end
points of cardiovascular mortality, cardiovascular death or hospitalization, and
worsening heart failure were also not different. Tolvaptan significantly improved
secondary end points of day 1 patient-assessed dyspnea, day 1 body weight, and
day 7 edema. In patients with hyponatremia, serum sodium levels significantly
increased. The Kansas City Cardiomyopathy Questionnaire overall summary score was
not improved at outpatient week 1, but body weight and serum sodium effects
persisted long after discharge. Tolvaptan caused increased thirst and dry mouth,
but frequencies of major adverse events were similar in the 2 groups.
CONCLUSION: Tolvaptan initiated for acute treatment of patients hospitalized with
heart failure had no effect on long-term mortality or heart failure-related
TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT00071331
PMID: 17384437 [PubMed - indexed for MEDLINE]
Int J Cardiol. 2002 Nov;86(1):1-4.
Omapatrilat--the story of Overture and Octave.
Int J Cardiol. 2003 Sep;91(1):113.
At the American College of Cardiology in March two major trials were presented.
The publicity surrounding the two could not have been more different. The LIFE
demonstrated clear superiority of losartan-based therapy over atenolol-based
therapy for the treatment of hypertension. It was published the same week in the
Lancet and received major press coverage all over the world. The OVERTURE
(Omapatrilat Versus Enalapril Randomized Trial of Utility in Reducing Events)
study in contrast received a subdued reception, very little publicity and is yet
to be published. 5770 NYHA class II-IV heart failure patients (LVEF
10 mg BD of Enalapril or 40 mg once a day Omapatrilat. The primary end-point of
all cause mortality or heart failure related hospitalisation did not differ
significantly: 914/2884 for Enalapril and 914/2886 for Omapatrilat (hazard ratio
0.94, CI's 0.86-1.03, P=0.187). Mortality was also similar: 509 for Enalapril and
477 for Omapatrilat (hazard ratio 0.94, CI's 0.83-1.07, P=0.339). Omapatrilat was
as good as Enalapril but not better. The worrying trend was however, that
angioedema was more common with Omapatrilat; 24 (0.8%) versus 14 cases (0.5%).
The OCTAVE (Omapatrilat Cardiovascular Treatment Assessment Versus Enalapril)
study was also presented at this time. 25,267 hypertensives were randomised to
Omapatrilat or enalapril and a difference of approximately 3 mmHg in favour of
Omapatrilat was seen. Significantly more cases of angioedema were seen with
Omapatrilat, 274 (2.17%) compared to 86 (0.68%) with enalapril. Overall death
rates were similar, 0.18% for enalapril and 0.15% for Omapatrilat. All adverse
events werehttps://www.blogger.com/blogger.g?blogID=8343526887863586538#editor/target=post;postID=1531264929101084479 similar, 51.0% for Omapatrilat and 50.4% for enalapril. The rates of
angioedema were much higher in blacks, 5.54% for Ompatrilat and 1.62% for
enalapril and for smokers, 3.93% for Omapatrilat and 0.81% for enalapril. We were
left with a drug that was, for heart failure, not superior to an ACE inhibitor
already off patent, and, as an anti-hypertensive, with an angioedema rate more
than double that of an ACE inhibitor in a large head to head comparison. The
medical community will be watching to make sure these data are published in full
in the medical literature in a timely fashion, in the order of end-points
specified in the protocol and with appropriate emphasis on the logical points of
PMID: 12243845 [PubMed - indexed for MEDLINE]
N Engl J Med. 2014 Sep 11;371(11):993-1004. doi: 10.1056/NEJMoa1409077. Epub 2014Aug 30.
Angiotensin-neprilysin inhibition versus enalapril in heart failure.
McMurray JJ(1), Packer M, Desai AS, Gong J, Lefkowitz MP, Rizkala AR, Rouleau JL,
Shi VC, Solomon SD, Swedberg K, Zile MR; PARADIGM-HF Investigators and
(1)From the British Heart Foundation (BHF) Cardiovascular Research Centre,
University of Glasgow, Glasgow, United Kingdom (J.J.V.M.); the Department of
Clinical Sciences, University of Texas Southwestern Medical Center, Dallas
(M.P.); the Division of Cardiovascular Medicine, Brigham and Women's Hospital,
Boston (A.S.D., S.D.S.); Novartis Pharmaceuticals, East Hanover, NJ (J.G.,
M.P.L., A.R.R., V.C.S.); Institut de Cardiologie de Montréal, Université de
Montréal, Montreal (J.L.R.); the Department of Molecular and Clinical Medicine,
University of Gothenburg, Gothenburg, Sweden (K.S.); National Heart and Lung
Institute, Imperial College London, London (K.S.); and the Medical University of
South Carolina and Ralph H. Johnson Veterans Affairs Medical Center, Charleston
Nat Rev Cardiol. 2014 Nov;11(11):618.
Perspect Infirm. 2015 Jan-Feb;12(1):61.
N Engl J Med. 2014 Dec 11;371(24):2336-7.
N Engl J Med. 2014 Dec 11;371(24):2335-6.
N Engl J Med. 2014 Dec 11;371(24):2335.
G Ital Cardiol (Rome). 2014 Dec;15(12):651-5.
N Engl J Med. 2014 Sep 11;371(11):1062-4.
N Engl J Med. 2014 Dec 11;371(24):2336.
BACKGROUND: We compared the angiotensin receptor-neprilysin inhibitor LCZ696 with
enalapril in patients who had heart failure with a reduced ejection fraction. In
previous studies, enalapril improved survival in such patients.
METHODS: In this double-blind trial, we randomly assigned 8442 patients with
class II, III, or IV heart failure and an ejection fraction of 40% or less to
receive either LCZ696 (at a dose of 200 mg twice daily) or enalapril (at a dose
of 10 mg twice daily), in addition to recommended therapy. The primary outcome
was a composite of death from cardiovascular causes or hospitalization for heart
failure, but the trial was designed to detect a difference in the rates of death
from cardiovascular causes.
RESULTS: The trial was stopped early, according to prespecified rules, after a
median follow-up of 27 months, because the boundary for an overwhelming benefit
with LCZ696 had been crossed. At the time of study closure, the primary outcome
had occurred in 914 patients (21.8%) in the LCZ696 group and 1117 patients
(26.5%) in the enalapril group (hazard ratio in the LCZ696 group, 0.80; 95%
confidence interval [CI], 0.73 to 0.87; P<0 .001="" 711="" a="" br="" of="" patients="" total="">receiving LCZ696 and 835 patients (19.8%) receiving enalapril died (hazard ratio
for death from any cause, 0.84; 95% CI, 0.76 to 0.93; P<0 .001="" br="" of="" these="">patients, 558 (13.3%) and 693 (16.5%), respectively, died from cardiovascular
causes (hazard ratio, 0.80; 95% CI, 0.71 to 0.89; P<0 .001="" as="" br="" compared="" with="">enalapril, LCZ696 also reduced the risk of hospitalization for heart failure by
21% (P<0 .001="" and="" br="" decreased="" heart="" limitations="" of="" physical="" symptoms="" the="">failure (P=0.001). The LCZ696 group had higher proportions of patients with
hypotension and nonserious angioedema but lower proportions with renal
impairment, hyperkalemia, and cough than the enalapril group.
CONCLUSIONS: LCZ696 was superior to enalapril in reducing the risks of death and
of hospitalization for heart failure. (Funded by Novartis; PARADIGM-HF
ClinicalTrials.gov number, NCT01035255.).
PMID: 25176015 [PubMed - indexed for MEDLINE]
Clin Sci (Lond). 1993 Jul;85(1):19-26.
Renal and hormonal effects of chronic inhibition of neutral endopeptidase (EC 184.108.40.206) in normal man.
O'Connell JE(1), Jardine AG, Davies DL, McQueen J, Connell JM.
(1)MRC Blood Pressure Unit, Western Infirmary, Glasgow, U.K.
1. Acute pharmacological inhibition of the enzyme neutral endopeptidase (EC
220.127.116.11), which cleaves the cardiac hormone atrial natriuretic peptide, raises
endogenous levels of the hormone. Short-term administration of inhibitors causes
natriuresis and diuresis in normal and hypertensive subjects; we report here the
effects of an orally active neutral endopeptidase inhibitor (candoxatril, 200 mg)
given twice daily for 10 days to normal salt-replete male subjects (n = 12) in a
placebo-controlled cross-over study. 2. Candoxatril administration caused a
transient natriuresis on day 1 of treatment, but this was not sustained, and
cumulative sodium excretion at the end of the study was not altered by active
therapy [1720 +/- 40 versus 1734 +/- 57 (placebo) mmol; means +/- SEM];
exchangeable body sodium content was similarly unchanged. However, urinary cyclic
GMP excretion was elevated throughout the active treatment phase when compared
with placebo. 3. Although a change in plasma levels of atrial natriuretic peptide
could not be demonstrated, platelet atrial natriuretic peptide binding sites were
reduced by active treatment [23 +/- 3 versus 39 +/- 4 (placebo) fmol/10(9); P <
0.001]. 4. Basal blood pressure and heart rate were not affected by candoxatril
treatment. After 10 days of therapy subjects were given incremental infusions of
angiotensin II (2, 4 and 8 ng min-1 kg-1) followed by phenylephrine. Although
active therapy had not altered basal plasma concentrations of active renin and
angiotensin II, levels of angiotensin II during infusion of the octapeptide were
higher during the active phase.(ABSTRACT TRUNCATED AT 250 WORDS)
PMID: 8149689 [PubMed - indexed for MEDLINE]
Nephrol Dial Transplant. 2014 Aug 18. pii: gfu269. [Epub ahead of print]
Neprilysin inhibition in chronic kidney disease.
Judge P(1), Haynes R(1), Landray MJ(1), Baigent C(1).
(1)Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Nuffield
Department of Population Health, University of Oxford, Oxford OX3 7LF, UK.
Despite current practice, patients with chronic kidney disease (CKD) are at
increased risk of progression to end-stage renal disease and cardiovascular
events. Neprilysin inhibition (NEPi) is a new therapeutic strategy with potential
to improve outcomes for patients with CKD. NEPi enhances the activity of
natriuretic peptide systems leading to natriuresis, diuresis and inhibition of
the renin-angiotensin system (RAS), which could act as a potentially beneficial
counter-regulatory system in states of RAS activation such as chronic heart
failure (HF) and CKD. Early NEPi drugs were combined with angiotensin-converting
enzyme inhibitors but were associated with unacceptable rates of angioedema and,
therefore, withdrawn. However, one such agent (omapatrilat) showed promise of
NEP/RAS inhibition in treating CKD in animal models, producing greater reductions
in proteinuria, glomerulosclerosis and tubulointerstitial fibrosis compared with
isolated RAS inhibition. A new class of drug called angiotensin receptor
neprilysin inhibitor (ARNi) has been developed. One such drug, LCZ696, has shown
substantial benefits in trials in hypertension and HF. In CKD, HF is common due
to a range of mechanisms including hypertension and structural heart disease
(including left ventricular hypertrophy), suggesting that ARNi could benefit
patients with CKD by both retarding the progression of CKD (hence delaying the
need for renal replacement therapy) and reducing the risk of cardiovascular
disease. LCZ696 is now being studied in a CKD population.
© The Author 2014. Published by Oxford University Press on behalf of ERA-EDTA.
PMID: 25140014 [PubMed - as supplied by publisher]
Diabetologia. 2003 Jul;46(7):961-71. Epub 2003 Jun 28.
Renoprotective effects of vasopeptidase inhibition in an experimental model of diabetic nephropathy.
Davis BJ(1), Johnston CI, Burrell LM, Burns WC, Kubota E, Cao Z, Cooper ME, Allen
(1)Diabetic Complications Group, Baker Heart Research Institute, P.O. Box 6492,
Melbourne, 8008 Victoria, Australia.
AIMS: Although ACE inhibitors slow progression of diabetic renal disease, the
mortality and morbidity is still high. As other hormonal factors are involved,
inhibition of vasopeptidases could further reduce progression. We studied dual
inhibition of angiotensin converting enzyme and neutral endopeptidase in a model
of progressive diabetic renal injury. The major endpoints were reductions in
systemic blood pressure, albuminuria and renal structural injury.
METHODS: Diabetic spontaneously hypertensive rats were treated with the ACE
inhibitor perindopril (mg.kg(-1).day(-1)) or the vasopeptidase inhibitor
omapatrilat at doses of 10 (oma10) and 40 (oma40) mg.kg(-1).day(-1) for 32 weeks.
In vivo ACE and NEP inhibition was quantitated by in vitro autoradiography. Renal
structural injury was assessed by measurement of the glomerulosclerotic (GS)
index and tubulointerstitial area (TI). The expression of transforming growth
factor beta, beta-inducible gene-h3 and nephrin were also quantitated.
RESULTS: Despite a similar reduction in blood pressure by perindopril and oma10,
greater attenuation of albuminuria was afforded by oma10, with a complete
amelioration observed with oma40. Oma40 lead to a 33% reduction in renal NEP
binding and this was associated with less albuminuria and prevention of GS, TI
area and overexpression of TGFbeta and betaig-h3. Diabetes-associated reduction
in nephrin expression was restored by both drugs.
CONCLUSION/INTERPRETATION: These findings suggest that other vasoactive
mechanisms in addition to angiotensin II are important in the prevention of
diabetic nephropathy, and that vasopeptidase inhibition might confer an advantage
over blockade of the RAS alone in the treatment of diabetic renal disease.
PMID: 12838387 [PubMed - indexed for MEDLINE]
Eur J Heart Fail. 2015 Feb 6. doi: 10.1002/ejhf.232. [Epub ahead of print]
Renal effects of the angiotensin receptor neprilysin inhibitor LCZ696 in patients with heart failure and preserved ejection fraction.
Voors AA(1), Gori M, Liu LC, Claggett B, Zile MR, Pieske B, McMurray JJ, Packer
M, Shi V, Lefkowitz MP, Solomon SD; for the PARAMOUNT Investigators.
(1)Department of Cardiology, University Medical Centre Groningen, University of
Groningen, Hanzeplein 1, 9713 GZ, Groningen, the Netherlands.
BACKGROUND: Increases in serum creatinine with renin-angiotensin-aldosterone
system (RAAS) inhibitors can lead to unnecessary discontinuation of these agents.
The dual-acting angiotensin receptor neprilysin inhibitor LCZ696 improves
clinical outcome patients with heart failure with reduced ejection fraction, and
pilot data suggest potential benefit in heart failure with preserved ejection
fraction (HFpEF). The effects of LCZ696 on renal function have not been assessed.
METHODS AND RESULTS: A total of 301 HFpEF patients were randomly assigned to
LCZ696 or valsartan in the PARAMOUNT trial. We studied renal function
[creatinine, estimated glomerular filtration rate (eGFR), cystatin C, and urinary
albumin to creatinine ratio (UACR)] at baseline, 12 weeks, and after 36 weeks of
treatment. Worsening renal function (WRF) was determined as an serum creatinine
increase of >0.3 mg/dL and/or >25% between two time-points. Mean eGFR at baseline
was 65.4 ± 20.4 mL/min per 1.73 m(2) . The eGFR declined less in the LCZ696 group
than in the valsartan group (-1.5 vs. -5.2 mL/min per 1.73 m(2) ; P = 0.002). The
incidence of WRF was lower in the LCZ696 group (12%) than in the valsartan group
(18%) at any time-point, but this difference was not statistically significant (P
= 0.18). Over 36 weeks, the geometric mean of UACR increased in the LCZ696 group
(2.4-2.9 mg/mmol), whereas it remained stable in the valsartan group (2.1-2.0
mg/mmol; P for difference between groups = 0.016).
CONCLUSION: In patients with HFpEF, therapy with LCZ696 for 36 weeks was
associated with preservation of eGFR compared with valsartan therapy, but an
increase in UACR.
© 2015 The Authors European Journal of Heart Failure © 2015 European Society of
PMID: 25657064 [PubMed - as supplied by publisher]
Wednesday, March 11, 2015
Laparoscopic partial nephrectomy for hilar tumors: oncologic and renal functional outcomes.
George AK(1), Herati AS(2), Rais-Bahrami S(2), Waingankar N(2), Kavoussi LR(2).
(1)The Arthur Smith Institute for Urology, Hofstra North Shore-LIJ School of
Medicine, New Hyde Park, NY. Electronic address: firstname.lastname@example.org. (2)The
Arthur Smith Institute for Urology, Hofstra North Shore-LIJ School of Medicine,
New Hyde Park, NY.
OBJECTIVE: To present our experience with laparoscopic partial nephrectomy (LPN)
for hilar tumors and evaluate intermediate oncologic and renal functional
MATERIALS AND METHODS: A retrospective review of LPN cases performed in 488
patients was performed. Hilar lesions were defined as renal cortical tumors in
direct physical contact with the renal artery, vein, or both, as identified on
preoperative imaging and confirmed intraoperatively. The clinicopathologic
parameters, perioperative course, complications, and oncologic and 6-month renal
functional outcomes were analyzed.
RESULTS: A total of 488 patients underwent LPN, of which 43 were hilar. The mean
tumor size for hilar and nonhilar tumors was 3.6 cm and 3.1 cm, respectively. The
mean operative time was shorter for hilar as compared with nonhilar tumors (129.1
minutes vs 141.8 minutes). Mean estimated blood loss was greater in LPN for hilar
tumors (311.65 mL vs 298.4 mL). There were no statistically significant
differences noted in any of the perioperative parameters investigated despite a
higher nephrometry complexity score in the hilar group. Change in estimated
glomerular filtration rate at 6 months showed a decrease of 10.9 mL/min and 8.8
mL/min for hilar and nonhilar tumors, respectively (P = NS). There was 1
recurrence detected in the hilar group, with a median follow-up of 41.6 months.
CONCLUSION: In the hands of an experienced laparoscopist, LPN can safely be
performed for hilar tumors, with preservation of perioperative outcomes and
durable renal functional and oncologic outcomes.
Copyright © 2014 Elsevier Inc. All rights reserved.
PMID: 24119677 [PubMed - indexed for MEDLINE]
Eur Urol. 2011 Apr;59(4):543-52. doi: 10.1016/j.eururo.2010.12.013. Epub 2010 Dec22.
A prospective, randomised EORTC intergroup phase 3 study comparing the oncologic outcome of elective nephron-sparing surgery and radical nephrectomy for low-stage renal cell carcinoma.
Van Poppel H(1), Da Pozzo L, Albrecht W, Matveev V, Bono A, Borkowski A, Colombel
M, Klotz L, Skinner E, Keane T, Marreaud S, Collette S, Sylvester R.
(1)Department of Urology, University Hospital Gasthuisberg, Katholieke
Universiteit Leuven, Leuven, Belgium. Hendrik.VanPoppel@uz.leuven.ac.be
Eur Urol. 2011 Aug;60(2):e9; author reply e10.
Eur Urol. 2012 Apr;61(4):e37-8.
Eur Urol. 2012 Sep;62(3):564-5.
Eur Urol. 2013 Feb;63(2):399-400.
Eur Urol. 2011 Apr;59(4):553-5.
BACKGROUND: Nephron-sparing surgery (NSS) can safely be performed with slightly
higher complication rates than radical nephrectomy (RN), but proof of oncologic
effectiveness is lacking.
OBJECTIVE: To compare overall survival (OS) and time to progression.
DESIGN, SETTING, AND PARTICIPANTS: From March 1992 to January 2003, when the
study was prematurely closed because of poor accrual, 541 patients with small (≤5
cm), solitary, T1-T2 N0 M0 (Union Internationale Contre le Cancer [UICC] 1978)
tumours suspicious for renal cell carcinoma (RCC) and a normal contralateral
kidney were randomised to NSS or RN in European Organisation for Research and
Treatment of Cancer Genito-Urinary Group (EORTC-GU) noninferiority phase 3 trial
INTERVENTION: Patients were randomised to NSS (n=268) or RN (n=273) together with
limited lymph node dissection (LND).
MEASUREMENTS: Time to event end points was compared with log-rank test results.
RESULTS AND LIMITATIONS: Median follow-up was 9.3 yr. The intention-to-treat
(ITT) analysis showed 10-yr OS rates of 81.1% for RN and 75.7% for NSS. With a
hazard ratio (HR) of 1.50 (95% confidence interval [CI], 1.03-2.16), the test for
noninferiority is not significant (p=0.77), and test for superiority is
significant (p=0.03). In RCC patients and clinically and pathologically eligible
patients, the difference is less pronounced (HR=1.43 and HR=1.34, respectively),
and the superiority test is no longer significant (p=0.07 and p=0.17,
respectively). Only 12 of 117 deaths were the result of renal cancer (four RN and
eight NSS). Twenty-one patients progressed (9 after RN and 12 after NSS). Quality
of life and renal function outcomes have not been addressed.
CONCLUSIONS: Both methods provide excellent oncologic results. In the ITT
population, NSS seems to be significantly less effective than RN in terms of OS.
However, in the targeted population of RCC patients, the trend in favour of RN is
no longer significant. The small number of progressions and deaths from renal
cancer cannot explain any possible OS differences between treatment types.
Copyright © 2010 European Association of Urology. Published by Elsevier B.V. All
PMID: 21186077 [PubMed - indexed for MEDLINE]
JAMA. 2012 Apr 18;307(15):1629-35. doi: 10.1001/jama.2012.475.
Long-term survival following partial vs radical nephrectomy among older patients with early-stage kidney cancer.
Tan HJ(1), Norton EC, Ye Z, Hafez KS, Gore JL, Miller DC.
(1)Dow Division of Health Services Research, Department of Urology, University of
Michigan, Ann Arbor, MI 48109-2800, USA.
Eur Urol. 2012 Aug;62(2):352-3.
JAMA. 2012 Apr 18;307(15):1641-3.
Urol Oncol. 2013 Jan;31(1):126-7.
J Urol. 2012 Nov;188(5):1723-4.
CONTEXT: Although partial nephrectomy is the preferred treatment for many
patients with early-stage kidney cancer, recent clinical trial data, which
demonstrate better survival for patients treated with radical nephrectomy, have
generated new uncertainty regarding the comparative effectiveness of these
OBJECTIVE: To compare long-term survival after partial vs radical nephrectomy
among a population-based patient cohort whose treatment reflects contemporary
DESIGN, SETTING, AND PATIENTS: We performed a retrospective cohort study of
Medicare beneficiaries with clinical stage T1a kidney cancer treated with partial
or radical nephrectomy from 1992 through 2007. Using an instrumental variable
approach to account for measured and unmeasured differences between treatment
groups, we fit a 2-stage residual inclusion model to estimate the treatment
effect of partial nephrectomy on long-term survival.
MAIN OUTCOME MEASURES: Overall and kidney cancer-specific survival.
RESULTS: Among 7138 Medicare beneficiaries with early-stage kidney cancer, we
identified 1925 patients (27.0%) treated with partial nephrectomy and 5213
patients (73.0%) treated with radical nephrectomy. During a median follow-up of
62 months, 487 (25.3%) and 2164 (41.5%) patients died following partial or
radical nephrectomy, respectively. Kidney cancer was the cause of death for 37
patients (1.9%) treated with partial nephrectomy, and 222 patients (4.3%) treated
with radical nephrectomy. Patients treated with partial nephrectomy had a
significantly lower risk of death (hazard ratio [HR], 0.54; 95% CI, 0.34-0.85).
This corresponded with a predicted survival increase with partial nephrectomy of
5.6 (95% CI, 1.9-9.3), 11.8 (95% CI, 3.9-19.7), and 15.5 (95% CI, 5.0-26.0)
percentage points at 2, 5, and 8 years posttreatment (P < .001). No difference
was noted in kidney cancer-specific survival (HR, 0.82; 95% CI, 0.19-3.49).
CONCLUSION: Among Medicare beneficiaries with early-stage kidney cancer who were
candidates for either surgery, treatment with partial rather than radical
nephrectomy was associated with improved survival.
PMID: 22511691 [PubMed - indexed for MEDLINE]
Eur Urol. 2014 Feb;65(2):372-7. doi: 10.1016/j.eururo.2013.06.044. Epub 2013 Jul 2.
Renal function after nephron-sparing surgery versus radical nephrectomy: results from EORTC randomized trial 30904.
Scosyrev E(1), Messing EM(2), Sylvester R(3), Campbell S(4), Van Poppel H(5).
(1)Department of Urology, University of Rochester Medical Center, Rochester, NY,
USA. (2)Department of Urology, University of Rochester Medical Center, Rochester,
NY, USA. Electronic address: Edward_Messing@urmc.rochester.edu. (3)Department of
Biostatistics, EORTC Headquarters, Brussels, Belgium. (4)Department of Urology,
Cleveland Clinic, Cleveland, OH, USA. (5)Department of Urology, University
Hospital K.U. Leuven, Leuven, Belgium.
J Urol. 2014 Aug;192(2):369-70.
Eur Urol. 2014 Feb;65(2):378-9; discussion 379-80.
BACKGROUND: In the European Organization for Research and Treatment of Cancer
(EORTC) randomized trial 30904, nephron-sparing surgery (NSS) was associated with
reduced overall survival compared with radical nephrectomy (RN) over a median
follow-up of 9.3 yr (hazard ratio: 1.50; 95% confidence interval [CI],
OBJECTIVE: To examine the impact of NSS relative to RN on kidney function in
DESIGN, SETTING, AND PARTICIPANTS: This phase 3 international randomized trial
was conducted in patients with a small (≤5 cm) renal mass and normal
contralateral kidney who were enrolled from March 1992 to January 2003.
INTERVENTION: Patients were randomized to RN (n=273) or NSS (n=268).
OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: Follow-up estimated glomerular
filtration rates (eGFR; milliliters per minute per 1.73 m(2)) were recorded for
259 subjects in the RN arm and 255 subjects in the NSS arm. Percentages of
subjects developing at least moderate renal dysfunction (eGFR <60 advanced="" br="">kidney disease (eGFR <30 br="" calculated="" each="" egfr="" failure="" for="" kidney="" or="" were="">treatment arm based on the lowest recorded follow-up eGFR (intent-to-treat
RESULTS AND LIMITATIONS: With a median follow-up of 6.7 yr, eGFR <60 br="" reached="" was="">by 85.7% with RN and 64.7% with NSS, with a difference of 21.0% (95% CI,
13.8-28.3); eGFR <30 10.0="" 6.3="" a="" and="" br="" by="" nss="" reached="" rn="" was="" with="">difference of 3.7% (95% CI, -1.0 to 8.5); and eGFR <15 1.5="" br="" by="" reached="" was="" with="">RN and 1.6% with NSS, with a difference of -0.1% (95% CI, -2.2 to 2.1). Lack of
longer follow-up for eGFR is a limitation of these analyses.
CONCLUSIONS: Compared with RN, NSS substantially reduced the incidence of at
least moderate renal dysfunction (eGFR <60 although="" available="" br="" follow-up="" with="">the incidence of advanced kidney disease (eGFR <30 br="" in="" relatively="" similar="" the="" was="">two treatment arms, and the incidence of kidney failure (eGFR <15 br="" nearly="" was="">identical. The beneficial impact of NSS on eGFR did not result in improved
survival in this study population.
REGISTRATION: EORTC trial 30904; ClinicalTrials.gov identifier NCT00002473.
Copyright © 2013 European Association of Urology. Published by Elsevier B.V. All
PMID: 23850254 [PubMed - indexed for MEDLINE]
Division of Nephrology and Hypertension, Department of Medicine, IFB-TX Hannover, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany
Received 11 September 2010; Accepted 1 November 2010
Academic Editor: David F. Lewis
Copyright © 2011 Janina Müller-Deile and Mario Schiffer. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Glomerular VEGF expression is critical for the maintenance and function of an intact filtration barrier. Alterations in glomerular VEGF bioavailability result in endothelial as well as in podocyte damage. Renal involvement in preeclampsia includes proteinuria, podocyturia, elevated blood pressure, edema, glomerular capillary endotheliosis, and thrombotic microangiopathy. At least the renal signs, symptoms, and other evidence can sufficiently be explained by reduced VEGF levels. The aim of this paper was to summarize our pathophysiological understanding of the renal involvement of preeclampsia and point out similarities to the renal side effects of VEGF-ablation therapy.
Bevacizumab-Mediated Interference With VEGF Signaling Is Sufficient to Induce a Preeclampsia-Like Syndrome in Nonpregnant Women
Hypertension secondary to anti-angiogenic therapy: experience with bevacizumab.
Pande A(1), Lombardo J, Spangenthal E, Javle M.
(1)Department of Medicine, Roswell Park Cancer Institute, Elm and Carlton Sts,
Buffalo, NY 14263, USA.
BACKGROUND: Hypertension (HT) is a common complication of anti-angiogenic
therapy. Its incidence, treatment and complications are undefined.
PATIENTS AND METHODS: Retrospective review of patients treated with bevacizumab
(BV) from 2003-5. Common toxicity criteria (CTC) for adverse events version 3.0
RESULTS: Fifty-five out of the 154 patients treated with BV (35%) experienced HT.
Eleven (20%) developed a new onset HT and 44 (80%) experienced an exacerbation of
pre-existing HT. HT developed after a median of 11 weeks at a median BV dose of
10 mg/kg. HT severity was grade 1 (n =1), grade 2 (n=29) or grade 3 (n=22); 3
experienced hypertensive complications. HT was controlled in 47 (85%); BV was
discontinued in 3. The angiotensin-converting enzyme inhibitor (ACE-I), quinapril
was commonly used and resulted in better HT control than ACE-II, calcium channel
or beta antagonists.
CONCLUSION: HT associated with bevacizumab therapy is a manageable toxicity with
the use of ACE-I.
PMID: 17972502 [PubMed - indexed for MEDLINE]
Risks of proteinuria and hypertension with bevacizumab, an antibody against vascular endothelial growth factor: systematic review and meta-analysis.
Zhu X(1), Wu S, Dahut WL, Parikh CR.
(1)Division of Nephrology, SUNY at Stony Brook, NY, USA.
BACKGROUND: Angiogenesis inhibitors have emerged as an effective targeted therapy
in the treatment of patients with many cancers. One of the most widely used
angiogenesis inhibitors is bevacizumab, a neutralizing antibody against vascular
endothelial growth factor. The overall risk of proteinuria and hypertension in
patients with cancer on bevacizumab therapy is unclear. We performed a systematic
review and meta-analysis of published clinical trials of bevacizumab to quantify
the risk of proteinuria and hypertension.
METHODS: The databases MEDLINE (OVID, 1966 to June 2006) and Web of Science and
abstracts presented at the American Society of Clinical Oncology annual meetings
from 2004 through 2006 were searched to identify relevant studies. Eligible
studies were randomized controlled trials of patients with cancer treated with
bevacizumab that described the incidence of proteinuria and hypertension.
Relative risk (RR) was calculated by using the fixed-effects model.
RESULTS: A total of 1,850 patients were included in the 7 trials identified from
the literature. Bevacizumab was associated with a significant increased risk of
proteinuria (RR, 1.4 with low-dose bevacizumab; 95% confidence interval [CI], 1.1
to 1.7; RR, 2.2 with high dose; 95% CI, 1.6 to 2.9). Hypertension also was
increased significantly among patients receiving bevacizumab (RR, 3.0 for low
dose; 95% CI, 2.2 to 4.2; RR, 7.5 for high dose; 95% CI, 4.2 to 13.4).
CONCLUSION: There was a significant dose-dependent increase in risk of
proteinuria and hypertension in patients with cancer who received bevacizumab.
PMID: 17261421 [PubMed - indexed for MEDLINE]
Thrombotic microangiopathy secondary to VEGF pathway inhibition by sunitinib.
Bollée G(1), Patey N, Cazajous G, Robert C, Goujon JM, Fakhouri F, Bruneval P,
Noël LH, Knebelmann B.
(1)APHP, Service de Néphrologie Adulte, Hôpital Necker, Paris, France.
Nephrol Dial Transplant. 2009 Jun;24(6):2002-3.
BACKGROUND: Drugs targeting the VEGF pathway are associated with renal adverse
events, including proteinuria, hypertension and thrombotic microangiopathy (TMA).
Most cases of TMA are reported secondary to bevacizumab. It was shown recently
that sunitinib, a small molecule inhibiting several tyrosine kinase receptors,
including VEGF receptors, can also induce proteinuria, hypertension and
biological features of TMA. Case. A 44-year-old woman with a history of malignant
skin hidradenoma was started on sunitinib for refractory disease. She developed
hypertension after 2 weeks and low-grade proteinuria after 4 weeks. Renal
function remained normal, and biological signs of TMA were absent. A renal biopsy
was performed 6 months later as proteinuria persisted, demonstrating typical
features of TMA. The patient was given irbesartan, and sunitinib was continued
for 3 months after diagnosis. Over this period, blood pressure and renal function
remained stable and proteinuria became undetectable.
CONCLUSION: We report on the first case of histologically documented TMA
secondary to sunitinib and provide detailed description of renal histological
involvement. This suggests that all anti-VEGF drugs may share a common risk for
developing renal adverse events, including TMA. Our case highlights the possible
discrepancy between mild clinical manifestation on one hand and severe TMA
features on renal biopsy on the other hand and pleads for large indication of
renal biopsy in this setting. The renin-angiotensin system blockers may be
considered in patients with mild clinical manifestations and in the absence of
therapeutic alternative to anti-VEGF drugs.
PMID: 19054798 [PubMed - indexed for MEDLINE]
Nephrol Dial Transplant. 2014 Feb;29(2):325-32. doi: 10.1093/ndt/gft465. Epub 2013 Dec 2.
All anti-vascular endothelial growth factor drugs can induce 'pre-eclampsia-like syndrome': a RARe study.
Vigneau C(1), Lorcy N, Dolley-Hitze T, Jouan F, Arlot-Bonnemains Y, Laguerre B,
Verhoest G, Goujon JM, Belaud-Rotureau MA, Rioux-Leclercq N.
(1)CHU Rennes, Service de Néphrologie, Rennes, France.
BACKGROUND: Specific therapies that target vascular endothelial growth factor
(VEGF) and its receptors have improved the survival of patients with metastatic
cancers, but can induce side effects. Renal side effects (proteinuria,
hypertension and renal failure) are underestimated.
METHODS: The French RARe (Reins sous traitement Anti-VEGF Registre) study
collects data on patients with cancer who had a renal biopsy because of major
renal side effects during treatment with anti-VEGF drugs.
RESULTS: We collected 22 renal biopsies performed 16.2±10.6 months after the
beginning of treatment; of which 21 had hypertension, mean proteinuria was
2.97±2.00 g/day and mean serum creatinine, 134±117 µmol/L. Thrombotic
microangiopathy (TMA) was observed in 21 biopsy specimens, sometimes associated
with acute tubular necrosis (ATN; n=4). TMA histological lesions were more
important than the biological signs of TMA could suggest. Patients with ATN of
>20% had higher serum creatinine levels than those with only TMA (231 versus 95
µmol/L). Nephrin, podocin and synaptopodin were variably down-regulated in all
renal biopsies. VEGF was down-regulated in all glomeruli.
CONCLUSION: This study underlines the importance of regular clinical and
biological cardiovascular and renal checking during all anti-VEGF therapies for
cancer for early detection of renal dysfunction. Collaboration between
oncologists and nephrologists is essential. In such cases, renal biopsy might
help in appreciating the severity of the renal lesions and after
multidisciplinary discussion whether or not it is safe to continue the treatment.
PMID: 24302609 [PubMed - indexed for MEDLINE]
Am J Geriatr Pharmacother. 2007 Dec;5(4):341-4. doi:
Allergic interstitial nephritis possibly related to sunitinib use.
(1)Scott & White Memorial Hospital and Clinic, Texas A&M College of Health
Sciences Center, Temple, Texas 76508, USA. email@example.com
BACKGROUND: Sunitinib is an oral multitargeted inhibitor indicated for the
treatment of renal cell carcinoma.
OBJECTIVE: This report describes a case of allergic interstitial nephritis
possibly related to this agent.
CASE SUMMARY: A 69-year-old female patient with a history of metastatic renal
cell carcinoma after left radical nephrectomy presented to our nephrology clinic
after completing 2 courses of sunitinib therapy. The patient was noted to have
progressive kidney dysfunction with proteinuria, together with peripheral
eosinophilia and eosinophiluria, which developed during the first of 2 cycles of
sunitinib therapy. Her concomitant medications included atenolol,
triamterene/hydrochlorothiazide, amlodipine, and multivitamin tablets, all of
which she had been receiving at stable doses over the previous 2 years. There
were no other over-the-counter medications involved and other possible causes of
interstitial nephritis were excluded. The proteinuria, eosinophilia, and
eosinophiluria worsened with the second course and resolved after sunitinib
discontinuation, which resulted in initial stabilization followed by slight
improvement in kidney function. The Naranjo Adverse Drug Reaction Probability
Scale score for this event was 7, indicating a probable association of the event
with the drug. With clinical improvement after discontinuation of sunitinib and
the presence of a solitary remaining kidney and thrombocytopenia, renal biopsy
was not performed after discussion with the patient. When challenged with a
related agent, sorafenib, the patient experienced worsening of serum creatinine
and increasing eosinophilia, similar to that noted with sunitinib, suggesting
that this event may be a class effect.
CONCLUSIONS: Nephrologists and oncologists should be aware of allergic
interstitial nephritis as an adverse effect related to this agent. Although there
are no current recommendations for monitoring serum creatinine with sunitinib
therapy, we recommend that serum creatinine and white cell count with
differential be checked within 2 weeks of initiation of therapy with sunitinib to
enable earlier diagnosis of this condition and avoid renal damage.
PMID: 18179992 [PubMed - indexed for MEDLINE]
Nephron Clin Pract. 2011;117(4):c312-9. doi: 10.1159/000319885. Epub 2010 Nov 3.
Nephrotoxicities associated with the use of tyrosine kinase inhibitors: a single-center experience and review of the literature.
Jhaveri KD(1), Flombaum CD, Kroog G, Glezerman IG.
(1)Division of Nephrology and Hypertension, Weill Cornell Medical Center, New
York, NY, USA. firstname.lastname@example.org
BACKGROUND: Sunitinib is an oral multitargeted tyrosine kinase receptor inhibitor
(MTKI) used for the treatment of renal cell carcinoma. These small-molecule
agents inhibit signaling through receptor tyrosine kinases such as vascular
endothelial growth factor receptor, platelet-derived growth factor receptor and
cytokine stem cell factor receptor, among others. Although the development of
these novel molecular-targeted agents represents a substantial advance in the
treatment of metastatic cancer, the spectrum of their adverse effects may be
broader than initially predicted.
METHOD: We performed a retrospective chart review of patients who had received
sunitinib and developed renal insufficiency.
RESULTS: We describe 4 patients with renal cell carcinoma and 1 patient with
transitional cell carcinoma treated with sunitinib who experienced various
degrees of nephrotoxicity including hypertension, proteinuria, thrombotic
microangiopathy, and acute and chronic kidney injury which resolved upon
cessation of MTKI.
CONCLUSIONS: Nephrologists and oncologists should be aware of the potential for
toxic renal effects, and we recommend guidelines for early recognition and
treatment of these conditions in patients receiving MTKI.
Copyright © 2010 S. Karger AG, Basel.
PMID: 21051905 [PubMed - indexed for MEDLINE]
Ann Oncol. 2011 Sep;22(9):2073-9. doi: 10.1093/annonc/mdq715. Epub 2011 Feb 10.
Imatinib treatment duration is related to decreased estimated glomerular filtration rate in chronic myeloid leukemia patients.
Marcolino MS(1), Boersma E, Clementino NC, Macedo AV, Marx-Neto AD, Silva MH, van
Gelder T, Akkerhuis KM, Ribeiro AL.
(1)School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte,
BACKGROUND: We analyzed the incidence of acute kidney injury and chronic renal
failure in chronic myeloid leukemia (CML) patients using imatinib and
investigated whether there is a relation between duration of imatinib therapy and
decrease in estimated glomerular filtration rate (GFR).
PATIENTS AND METHODS: One hundred five CML patients on imatinib therapy were
enrolled. Creatinine, urea, uric acid, and potassium measurements from imatinib
treatment onset until the end of follow-up (median 4.5 years) were included in
the analysis. GFR was estimated using the Chronic Kidney Disease Epidemiology
RESULTS: During follow-up, 7% of patients developed acute kidney injury;
creatinine levels returned to baseline in only one of them. According to the
regression equation, the mean baseline value of the estimated GFR was 88.9
ml/min/1.73 m(2). Estimated GFR decreased significantly with imatinib treatment
duration; the mean decrease per year was 2.77 ml/min/1.73 m(2) (P < 0.001); 12%
of patients developed chronic renal failure. Age, hypertension, and a history of
chronic renal failure or interferon usage were not significantly related to the
mean decrease in the estimated GFR over time.
CONCLUSION: The introduction of imatinib therapy in nonclinical trial CML
patients is associated with potentially irreversible acute renal injury, and the
long-term treatment may cause a clinically relevant decrease in the estimated
PMID: 21310760 [PubMed - indexed for MEDLINE]
Leuk Res. 2009 Feb;33(2):344-7. doi: 10.1016/j.leukres.2008.07.029. Epub 2008 Oct2.
Renal failure and recovery associated with second-generation Bcr-Abl kinase inhibitors in imatinib-resistant chronic myelogenous leukemia.
Holstein SA(1), Stokes JB, Hohl RJ.
(1)Division of Hematology, Oncology and Blood & Marrow Transplantation,
Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA.
Tyrosine kinase inhibitors (TKIs) directed against the Bcr-Abl kinase have
revolutionized the treatment of chronic myelogenous leukemia (CML). Relatively
little is known regarding the effects of these agents on the kidney. Clinically,
there have been a handful of reports associating imatinib with acute renal
failure. Preclinical reports indicate that imatinib inhibits signaling pathways
which may play a role in renal injury. We report the case of a patient with
imatinib-resistant CML who developed renal failure after being placed on
dasatinib. When she later became resistant to dasatinib she was switched to
nilotinib. Shortly thereafter, she became dialysis-independent. Second-generation
Bcr-Abl TKIs may influence renal function based on differential inhibition of
related tyrosine kinases.
PMID: 18835038 [PubMed - indexed for MEDLINE]
N Engl J Med. 2006 May 11;354(19):2006-13.
Altered bone and mineral metabolism in patients receiving imatinib mesylate.
Berman E(1), Nicolaides M, Maki RG, Fleisher M, Chanel S, Scheu K, Wilson BA,
Heller G, Sauter NP.
(1)Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY
10021, USA. email@example.com
N Engl J Med. 2006 Aug 10;355(6):627; author reply 628-9.
N Engl J Med. 2006 Aug 10;355(6):627; author reply 628-9.
N Engl J Med. 2006 Dec 7;355(23):2494-5.
N Engl J Med. 2006 Aug 10;355(6):628; author reply 628-9.
BACKGROUND: Imatinib mesylate inhibits several tyrosine kinases, including
BCR-ABL, the C-KIT receptor, and the platelet-derived growth factor receptors
alpha and beta, all of which are associated with disease. We observed that
hypophosphatemia developed in some patients with either chronic myelogenous
leukemia or gastrointestinal stromal tumors who were receiving imatinib.
METHODS: We identified 16 patients who had low serum phosphate levels and 8
patients who had normal serum phosphate levels, all of whom were receiving
imatinib. We performed the following biochemical measurements: whole-blood levels
of ionized calcium, plasma levels of intact parathyroid hormone, and serum levels
of total calcium, phosphate, 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D,
magnesium, and markers of bone formation (bone alkaline phosphatase and
osteocalcin) and bone resorption (N-telopeptide of collagen cross-links);
urinalysis; and phosphate, calcium, and creatinine levels in "spot" urine
RESULTS: Patients in the low-phosphate group (median serum phosphate level, 2.0
mg per deciliter [0.6 mmol per liter]; normal level, >2.5 mg per deciliter [0.8
mmol per liter]) had elevated parathyroid hormone levels and low-to-normal serum
calcium levels, were younger, and were receiving a higher dose of imatinib than
patients in the normal-phosphate group (median level, 3.2 mg per deciliter [1.0
mmol per liter]). Both groups had high levels of phosphate excreted in the urine
and markedly decreased serum levels of osteocalcin and N-telopeptide of collagen
CONCLUSIONS: Hypophosphatemia, with associated changes in bone and mineral
metabolism, develops in a proportion of patients taking imatinib for either
chronic myelogenous leukemia or gastrointestinal stromal tumors. The drug may
inhibit bone remodeling (formation and resorption), even in patients with normal
serum phosphate levels.
Copyright 2006 Massachusetts Medical Society.
PMID: 16687713 [PubMed - indexed for MEDLINE]