mTOR Inhibitors and Autosomal Dominant Polycystic Kidney Disease

2011 ◽  
Vol 364 (3) ◽  
pp. 286-289 ◽  
Author(s):  
E. F. Andreeva ◽  
N. D. Savenkova

The article reflects the genetic variants of polycystic kidney disease, describes the modern strategy for the treatment of polycystic kidney disease in children and adults. The authors present the results of clinical trials of vasopressin V2 receptor antagonists (tolvaptan, liksivaptan), a multi-kinase inhibitor (tezevatinib), somatostatin analogues (lankreotide, octreotide), statins (pravastatin), mTOR inhibitors (everolimus, sirolimus), metformin in patients with autosomal recessive and autosomal polycystic kidney disease. The authors discuss the factors determining the prognosis and outcome of these diseases.


Praxis ◽  
2009 ◽  
Vol 98 (25) ◽  
pp. 1511-1516
Author(s):  
Serra ◽  
Wüthrich

Die autosomal dominante polyzystische Nierenerkrankung (autosomal dominant polycystic kidney disease, ADPKD) ist charakterisiert durch eine massive Vergrösserung beider Nieren, bedingt durch unzählige Zysten. Die Zystenbildung beginnt bereits in utero und das kontinuierliche Zystenwachstum führt zur Kompression und Zerstörung des nicht-zystischen Nierenparenchyms, sodass schliesslich ein Nierenersatz in der 5. bis 6. Lebensdekade notwendig wird. Bisher gab es keine kausale Therapie, welche das Fortschreiten der Krankheiten aufhält. Tierexperimentelle Daten zeigen, dass die medikamentöse Inhibition eines zentralen Regulators der Zellproliferation, dem so genannten «mammalian target of rapamycin» (mTOR), den Kranheitsverlauf der ADPKD verlangsamen kann. Die vorliegende Übersicht vermittelt einen Einblick in die Erkrankung und in die neue therapeutische Möglichkeit des mTOR Inhibitors Sirolimus, welcher zurzeit in klinischen Studien getestet wird.


2009 ◽  
Vol 297 (6) ◽  
pp. F1597-F1605 ◽  
Author(s):  
Ming Wu ◽  
Alexandre Arcaro ◽  
Zsuzsanna Varga ◽  
Alexander Vogetseder ◽  
Michel Le Hir ◽  
...  

The efficacy of mammalian target of rapamycin (mTOR) inhibitors is currently tested in patients affected by autosomal dominant polycystic kidney disease. Treatment with mTOR inhibitors has been associated with numerous side effects. However, the renal-specific effect of mTOR inhibitor treatment cessation in polycystic kidney disease is currently unknown. Therefore, we compared pulse and continuous everolimus treatment in Han:SPRD rats. Four-week-old male heterozygous polycystic and wild-type rats were administered everolimus or vehicle by gavage feeding for 5 wk, followed by 7 wk without treatment, or continuously for 12 wk. Cessation of everolimus did not result in the appearance of renal cysts up to 7 wk postwithdrawal despite the reemergence of S6 kinase activity coupled with an overall increase in cell proliferation. Pulse everolimus treatment resulted in striking noncystic renal parenchymal enlargement and glomerular hypertrophy that was not associated with compromised kidney function. Both treatment regimens ameliorated kidney function, preserved the glomerular-tubular connection, and reduced proteinuria. Pulse treatment at an early age delays cyst development but leads to striking glomerular and parenchymal hypertrophy. Our data might have an impact when long-term treatment using mTOR inhibitors in patients with autosomal dominant polycystic kidney disease is being considered.


2019 ◽  
Vol 26 (16) ◽  
pp. 2962-2973
Author(s):  
Pei Kou ◽  
Shuang Wei ◽  
Fei Xiong

Autosomal Dominant Polycystic Kidney Disease (ADPKD), the most common monogenic kidney disease, is caused by mutations in the PKD1, PKD2 or, in a very limited number of families, GANAB genes. Although cellular and molecular mechanisms of this disease have been understood in the past 20 years, specific therapy approaches remain very little. Both experimental and clinical studies show that the mammalian or mechanistic target of rapamycin (mTOR) pathway plays an important role during cyst formation and enlargement in ADPKD. Studies in rodent models of ADPKD showed that mTOR inhibitors had a significant and long-lasting decrease in kidney volume and amelioration in kidney function. In the past over ten years, researchers have been devoting continuously to test mTOR inhibitors efficacy and safety in both preclinical studies and clinical trials in patients with ADPKD. In this review, we will discuss the mTOR pathway thoroughly, mainly focusing on current advances in understanding its role in ADPKD, especially the recent progress of mTOR inhibitors use in preclinical studies and clinical trials.


2012 ◽  
Vol 2012 ◽  
pp. 1-4
Author(s):  
L. Friedrich ◽  
F. Barbey ◽  
M. Pascual ◽  
J.-P. Venetz

Some experimental studies have suggested a beneficial effect of the mammalian target of rapamycin (mTOR) inhibitor use on hepatic and renal cyst growth in patients with autosomal dominant polycystic kidney disease (ADPKD). However, the results of clinical studies are conflicting and the role of mTOR inhibitors is still uncertain. We report the case of a patient with ADPKD who underwent deceased kidney transplantation because of an end-stage renal disease. The evolution was uneventful with an excellent graft function under cyclosporine (CsA) monotherapy. Some years later, the patient developed a symptomatic hepatomegaly due to growth of cysts. CsA was replaced by sirolimus, an mTOR inhibitor, in order to reduce or control the increase in the cyst and liver volume. Despite the switch, the hepatic volume increased by 25% in two years. Finally sirolimus was stopped because of the lack of effect on hepatic cyst growth and the presence of sirolimus side effects. The interest of our case resides in the followup by MRI imaging during the mTOR inhibitor treatment and 15 months after the restart of the initial immunosuppressive therapy. This observation indicates that mTOR inhibitors did not have significant effect on cyst-associated hepatic growth in our patient, which is consistent with some results of recent large clinical studies.


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