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. 2010 Jul;30(7):513–523. doi: 10.1089/jir.2009.0105

FIG. 3.

FIG. 3.

FIG. 3.

Unilateral ureteral obstruction (UUO) induces the expression of Oncostatin M (OSM) and OSM receptor mRNA. (A) Time course of OSM mRNA expression in left obstructed rat kidneys, and control kidneys (control) 1, 3, 6, 12, and 24 h after UUO. Ribonuclease protection assays (RPA) were performed with total RNA prepared from an entire kidney to quantitate mRNA levels for OSM and control ribosomal protein L32 (rPL32). Representative gel segments from 2 (a, b) obstructed and 2 control kidneys per time point showed a progressive up-regulation of mRNA encoding for OSM during the course of UUO as compared with control kidney. The sizes of protected fragments for both mRNA species are indicated with arrows. (Below) Semiquantitative data using densitometric analysis of OSM relative to L32. *P < 0.05. (B) Renal expression of OSM and OSM receptor mRNA was determined by real-time RT-PCR from total renal isolates at designated time points after unilateral ureteral obstruction (UUO) in the mouse or rat. Data are presented as the fold increase of OSM mRNA expression in obstructed kidneys (UUO) normalized to non-ligated control kidneys (time 0). Each bar represents the mean ± SEM for a group of 3 animals. *P < 0.01, **P < 0.05 versus normal controls.