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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Physiol+Renal+Physiol
2010 ; 298
(4
): F923-34
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Impact of Cyclin B2 and Cell division cycle 2 on tubular hyperplasia in
progressive chronic renal failure rats
#MMPMID20071461
Nishihara K
; Masuda S
; Nakagawa S
; Yonezawa A
; Ichimura T
; Bonventre JV
; Inui K
Am J Physiol Renal Physiol
2010[Apr]; 298
(4
): F923-34
PMID20071461
show ga
To clarify the specific molecular events of progressive tubular damage in chronic
renal failure (CRF), we conducted microarray analyses using isolated proximal
tubules from subtotally nephrectomized (Nx) rats as a model of CRF. Our results
clearly demonstrated time-dependent changes in gene expression profiles localized
to proximal tubules. The expression of mitosis-specific genes Cyclin B2 and Cell
division cycle 2 (Cdc2) was significantly and selectively increased in the
proximal tubules during the compensated period but decreased to basal level in
the end-stage period. Administration of everolimus, a potent inhibitor of
mammalian target of rapamycin, markedly reduced compensatory hypertrophy and
hyperplasia of epithelial cells, which was accompanied by complete abolishment of
the expression of Cyclin B2 and Cdc2 enhancement; renal function was then
severely decreased. Treatment with the Cdc2 inhibitor 2-cyanoethyl alsterpaullone
clearly decreased epithelial cell hyperplasia, based on staining of
phosphorylated histone H3 and Ki-67, while hypertrophy was not inhibited. In
conclusion, we have demonstrated roles of Cyclin B2 and Cdc2 in the epithelial
hyperplasia in response to Nx. These results advance the knowledge of the
contribution of cell cycle regulators, especially M phase, in pathophysiology of
tubular restoration and/or degeneration, and these two molecules are suggested to
be a marker for the proliferation of proximal tubular cells in CRF.
|Animals
[MESH]
|CDC2 Protein Kinase
[MESH]
|Cell Cycle Proteins/genetics/*metabolism
[MESH]
|Cell Cycle/genetics
[MESH]
|Cyclin B2/genetics/*metabolism
[MESH]
|Cyclin-Dependent Kinases
[MESH]
|Everolimus
[MESH]
|Hyperplasia/metabolism/pathology
[MESH]
|Immunosuppressive Agents/pharmacology
[MESH]
|Intracellular Signaling Peptides and Proteins/antagonists & inhibitors/metabolism
[MESH]