Words similar to cyclins
Example sentences for: cyclins
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In comparison to the two general alternative mechanisms utilized by known transforming viruses to promote cell-cycle progression, namely, by activating or bypassing endogenous D-type cyclins (herein, referred to as "cyclin D"), it has not been established whether HIV-1 gene products trigger either cyclin D-dependent or cyclin D-independent proliferation in non-lymphoid tissues [ 15 ] . In infected renal epithelium, HIV-1 could disrupt the inhibitory binding of pRb to E2F independent of endogenous cyclin D, analogous to transforming viral mechanisms that bypass and down-regulate endogenous cyclin D, such as SV-40 T antigen binding to pRb [ 16 ] , HHV-8 v -cyclin binding to and activating cyclin-dependent kinase-6 (CDK) [ 17 ] , and activation of cyclin E by EBV-induced c -myc [ 18 ] . Alternatively, HIV-1 could activate cyclin D-dependent proliferation, as exemplified by RSV v -src-mediated signaling [ 19 ] . In most tissues, the selective activation of these cell-cycle pathways is readily discernable.
The expression of cyclins also corresponds to the decreased lymphocyte proliferation with SRL and TAC therapy.
Current study supports our hypothesis that the immunosuppression results in an increased expression of cyclin inhibitor p21, which by inhibiting the expression of cyclins controls the allo-immune activation.
The APC is a large protein complex that ubiquinates mitotic cyclins and other regulatory proteins that are destined for timely proteolysis by proteasomes [ 10 20 ] . Proteasomes are multicatalytic 26S proteases consisting of a 20S central core catalytic subunit bordered by two 19S components [ 32 33 ] which hydrolyze C-terminal peptide bonds to acidic, basic, and hydrophobic amino-acid residues [ 20 34 ] . Proteasomes proteolyze securins which inhibit separase activity.
Studies have shown BRCA1 is upregulated in cells treated by DNA damaging agents such as cisplatinum [ 4 ] . BRCA1 has been shown to interact with DNA repair proteins such as Rad50 and Rad51, the tumor suppressor genes RB and BRCA2, transcriptional factors (RNA pol II, histone deacetylase complex, ctIP) as well as influence numerous cyclins and cyclin dependent kinases contributing to cell cycle regulation [ 5 6 7 8 9 10 11 12 ] . More recently, BRCA1 has been shown to influence apoptosis in a p53 independent manner [ 13 ] . This apoptotic response involved the c-jun kinase (JNK) pathway, though the details of this mechanism remain unclear [ 14 ] .
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