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  • Title: [Inhibition on phenotypic transformation of detrusor smooth muscle cells after bladder outlet obstruction by E2F decoy strategy].
    Author: Gong Y, Du CJ, Ding LL, Song B, Jin XY.
    Journal: Zhonghua Yi Xue Za Zhi; 2007 Mar 27; 87(12):829-32. PubMed ID: 17565867.
    Abstract:
    OBJECTIVE: To investigate the inhibitory effect of E2F decoy strategy on the phenotypic transformation of detrusor smooth muscle cells (DSMCs) so as to verify the effect of the E2F decoy strategy in improvement of the bladder function after bladder outlet obstruction (BOO). METHODS: Rat DSMCs were cultured, underwent cyclic mechanical stretch so as to establish BOO model, and then were divided into 3 groups: E2F-ODN decoy group [transfected with E2F-decoy ODN tagged with carboxy-fluorescein (FAM), a at its 3' end], Mis-decoy group (transfected with mismatch E2F-decoy ODN), and control group (without transfection). Inverted fluorescence microscopy was used to detect the green fluorescence of FAM in the successfully transfected cells. The proliferation of the cells was observed by MTT method. RT-PCR was used to examine the mRNA expression of proliferating cell nuclear antigen (PCNA). Western blotting was used to detect the protein expression of PCNA and cdk2 kinase. RESULTS: FAM-labeled E2F-ODN was detected stably in the DSMCs of the E2F-ODN decoy group 24 hours after transfection. The proliferation of the DSMCs of the E2F-ODN decoy group was decreased significantly compared with the mismatch E2F-ODN decoy and control groups (both P < 0.01). The mRNA expression of PCNA, protein expression of PCNA and cdk2 kinase of the E2F-ODN decoy group were all significantly lower than those of the other 2 groups (all P < 0.01). CONCLUSION: E2F-decoy ODN can be transfected and stably expressed in DSMCs. The phenotypic transformation of DSMCs can be successfully inhibited by E2F decoy strategy, which clarifies the potential role of structural stability-based method on improvement of bladder function recovery after BOO.
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