Abstract:
:Proteins destined for degradation by the ubiquitin-proteasome system are labelled with a 76-amino acid peptide, ubiquitin, through a series of conjugation steps by the E1, E2 and E3 enzymes respectively. Ubiquitin carboxy-terminal hydrolase 37 (UCH37) belongs to the UCH proteases family that deubiquitinates ubiquitin-protein conjugates in the ubiquitin-proteasome system. However, it is few reports about the relationship between UCH37 and apoptosis. In order to clarify the role of UCH37 on apoptosis, the A549 cells were chosen for this study. We transfected UCH37 siRNA and pcDNA3.1-UCH37 plasmid into A549 cells, respectively. Using MTT assay, Western blot, Hoechst 33342 staining assay and flow cytometry, we found that silencing of UCH37 in A549 cells induced apoptosis. The ratio of Bax/Bcl-2 was higher in silencing of UCH37 than that in control group after silencing of UCH37 in A549 cells. Meanwhile, experiments with the A549 cell line disclose that silencing of UCH37 could induce efficiently A549 cell apoptosis through activation of caspase-9 and caspase-3. On the other hand, over-expression of UCH37 led to the opposite effect. Hence, UCH37 might play an important role in apoptotic through altering Bax/Bcl-2 ratio and enzymatic activities of caspase-9 and caspase-3.
journal_name
Cell Biochem Functjournal_title
Cell biochemistry and functionauthors
Chen Z,Niu X,Li Z,Yu Y,Ye X,Lu S,Chen Zdoi
10.1002/cbf.1734subject
Has Abstractpub_date
2011-03-01 00:00:00pages
142-8issue
2eissn
0263-6484issn
1099-0844journal_volume
29pub_type
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