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Effects of Silencing NSD2 Gene by shRNA on Proliferation, Apoptosis and Akt /mTOR Signal Pathway in OCI-Ly3 Cells

Effects of Silencing NSD2 Gene by shRNA on Proliferation, Apoptosis and Akt /mTOR Signal Pathway in OCI-Ly3 Cells

Zhongguo Shi Yan Xue Ye Xue Za Zhi 26(3): 772-778

To investigate the effect of silencing NSD2 gene by RNA interference on the proliferation, apoptosis and the alteration of Akt /mTOR signaling pathway in diffuse large B cell lymphoma OCI-Ly3 cells. The shRNA targeting NSD2 gene was transfected into OCI-Ly3 cells by lentivirus infection. The NSD2 mRNA and protein were detected by real time Q-PCR and Western blot, respectively. The cell proliferation was detected by CCK-8 and apoptosis was measured by flow cytometry. The expressions of BCL-2, BAX, caspase-3, Akt, p-Akt, p-mTOR, p-P70S6K, H3K36me2 were detected by Western blot. After transfecting the OCI-Ly3 cells by NSD2-shRNA for 72 h, the expressions of NSD2 mRNA and protein both were down-regulated(P<0.05), the proliferation rate of cells in NSD2 shRNA group was significantly lower than that in control and Neg shRNA groups (P<0.05); the apoptosis rate of cells in NSD2 shRNA group was significantly higher than that in control and neg-shRNA group (30.37±4.22)% vs 1.36±0.52 % and 2.17±1.43)%(P<0.05); the expressions of BAX and caspase-3 were up-regulated, while the expression of BCL-2 was down-regulated; the H3K36me2 level significantly decreased as compared with control group, no obvious decrease of the total protein level of AKT was found, but the expressions of p-Akt, p-mTOR and p-70S6K were down-regulated. The silencing NSD2 gene can inhibit the proliferation and induce the apoptosis of OCI-Ly3 cells, their mechanisms may relate with regulating the H3K36me2 level, specifically inhibiting the activivty of AKT/mTOR signal pathway.

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Accession: 060592519

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PMID: 29950218

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