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Effect of Ccapsaicin on tNOX (ENOX2) protein expression in stomach cancer cells
Hsi-Ming Wang1, Pin Ju Chueh, Sheng-Pang Chang
1Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan.
Abstract:
Tumor-associated NADH oxidase (tNOX, also known as ENOX2) is a growth-related protein expressed in transformed cells. Previous reports have revealed that the inhibition of tNOX activity by the anti-cancer drug, capsaicin, correlates with a reduction in growth of cancer cells, indicating a close relationship between tNOX activity and cell growth. Moreover, the study of depleted tNOX expression by RNA interference in HeLa cells suggests that it may be associated with the ability of tumor cells to acquire an aggressive phenotype, particularly in relation to cell proliferation. A key role for tNOX in regulating cell growth is further supported by the observation that the growth rate of MEF cells from tNOX-overexpressing transgenic mice is approximately two-fold greater than that of wild-type cells. The purpose of this study was to investigate the anti-proliferative effect of capsaicin on tNOX expression level in stomach cancer cells. We showed that capsaicin induced cytotoxicity in SCM cells concomitantly with apoptosis, PARP cleavage, and down-regulation of tNOX protein.
Insights
Capsaicin, an anti-cancer drug, reduces stomach cancer cell growth by decreasing tumor-associated NADH oxidase (tNOX) protein levels. This inhibition also triggers apoptosis, indicating tNOX
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Tumor-associated NADH oxidase (tNOX, ENOX2) is a growth-related protein found in transformed cells.
- Inhibiting tNOX activity with capsaicin correlates with reduced cancer cell growth.
- tNOX expression is linked to aggressive tumor cell phenotypes and proliferation.
Purpose of the Study:
- To investigate the anti-proliferative effects of capsaicin on tNOX expression in stomach cancer cells.
- To understand the molecular mechanisms underlying capsaicin's action on stomach cancer.
Main Methods:
- Utilized SCM cells (stomach cancer cell line).
- Administered capsaicin to SCM cells.
- Assessed cytotoxicity, apoptosis, PARP cleavage, and tNOX protein levels.
Main Results:
- Capsaicin induced significant cytotoxicity in SCM cells.
- Apoptosis and PARP cleavage were observed, indicating programmed cell death.
- Down-regulation of tNOX protein levels was detected following capsaicin treatment.
Conclusions:
- Capsaicin exhibits anti-proliferative effects on stomach cancer cells.
- The anti-cancer activity of capsaicin involves the down-regulation of tNOX.
- Targeting tNOX may be a viable strategy for stomach cancer therapy.
