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[The inhibitory effect of CLA on mice forestomach neoplasia induced by B(a)P]
Objective:
To study the inhibitory effect of CLA on the postinitiation phase of forestomach neoplasia formation induced by B(a)P and explore its possible mechanism of anticarcinogenesis.
Methods:
Kunming mice were divided into five groups, i.e. salad oil control group, CLA control group, B(a)P group, B(a)P + high dose CLA group and B(a)P + low dose CLA group. The experimental period was 23 weeks, and the endpoints included cell proliferation, expression of Pan-ras P21 and some enzymes.
Results:
Short term CLA treated significantly inhibited the forestomach neoplasia formation induced by B(a)P at postinitiation phase. The incidence of tumor in the groups of B(a)P, B(a)P + high dose CLA and B(a)P + low dose CLA was 100%, 60% and 69% respectively (P < 0.05). The possible mechanism of this anticarcinogenic effect may be related to the inhibition of cell proliferation and the induction of the activities of GSH-Px, GST and SOD, irrespective of the regulation of expression of Pan-ras P21.
Conclusion:
CLA is a promising chemopreventive agent, and its anticarcinogenic effect may involve its effects on the redox system.
Insights
Conjugated linoleic acid (CLA) shows promise in preventing forestomach tumors induced by benzo[a]pyrene (B[a]P) in mice. CLA may work by reducing cell proliferation and influencing the body's redox system.
Area of Science:
- Oncology
- Chemoprevention
- Carcinogenesis research
Context:
- Forestomach neoplasia is a significant health concern.
- Benzo[a]pyrene (B[a]P) is a known carcinogen that can induce forestomach tumors.
- Understanding the mechanisms of carcinogenesis and potential preventive strategies is crucial.
Purpose:
- To investigate the inhibitory effects of conjugated linoleic acid (CLA) on the postinitiation phase of forestomach neoplasia induced by B[a]P.
- To explore the potential mechanisms underlying CLA's anticarcinogenic activity.
Summary:
- Kunming mice were administered B[a]P and varying doses of CLA or control substances for 23 weeks.
- CLA treatment significantly reduced tumor incidence in B[a]P-exposed mice.
- Key findings indicate CLA inhibits cell proliferation and modulates antioxidant enzyme activity (GSH-Px, GST, SOD), independent of Pan-ras P21 expression.
Impact:
- CLA demonstrates potential as a chemopreventive agent against forestomach cancer.
- The anticarcinogenic effects of CLA appear linked to its influence on the cellular redox system.
- This research provides insights into novel strategies for cancer prevention.
