Role of Sphk1 in the proliferation and invasion of human colon cancer Lovo cells.
Shijie Huaren Xiaohua Zazhi 2010;
18:2528-2532. [DOI:
10.11569/wcjd.v18.i24.2528]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the role of sphingosine kinase 1 (Sphk1) in the proliferation, apoptosis and invasion of colon cancer cells.
METHODS: Human colon cancer Lovo cells were divided into three groups: Sphk1 activation group [treated with 100 nmol/L phorbol 12-myristate 13-acetate (PMA)], Sphk1 suppression group [treated with 50 mmol/L N,N-dimethyl-D-erythro-sphingosine (DMS)], and control group (treated with 9 g/L NaCl). Cell proliferation activity was detected by MTT assay; cell apoptosis was detected by flow cytometry; cell invasion was detected by Transwell chamber assay; and the protein expression of Sphk1, ERK1/2, p-ERK1/2, and NF-kB p65 was detected by Western blot.
RESULTS: PMA significantly induced the expression of Sphk1 protein, promoted Lovo cell growth and invasion, inhibited cell apoptosis, and up-regulated the protein expression of ERK1/2, p-ERK1/2, and NF-kB p65. In contrast, DMS significantly inhibited the expression of Sphk1 protein, suppressed cell growth, promoted apoptosis, and down-regulated the protein expression of ERK1/2, p-ERK1/2, and NF-kB p65. The apoptosis rates in the Sphk1 activation group, Sphk1 suppression group and control group were 9.15%, 16.25% and 32.58%, respectively. The relative invasion rate in the Sphk1 activation group was significantly higher than that in the Sphk1 suppression group (190.57% vs 9.65%, P < 0.01).
CONCLUSION: Sphk1 promotes the proliferation and invasion but inhibits apoptosis of Lovo cells possibly via a mechanism associated with the activation of ERK1/2 and NF-kB signaling pathways.
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