The potential preventive effect of dietary phytochemicals In Vivo

Area of Science:

• Oncology
• Natural Products Chemistry
• Preventive Medicine

Background:

• Chemoprevention utilizes specific substances to inhibit cancer development.
• Curcumin (from Curcuma longa) and catechins (from green tea) are potent polyphenols.
• Epigallocatechin gallate, a major green tea polyphenol, exhibits synergistic effects with curcumin.

Purpose of the Study:

• To compare the chemopreventive effects of green tea and curcumin, individually and in combination.
• To evaluate their impact on chemically induced hamster buccal pouch carcinoma.

Main Methods:

• Fifty Syrian golden hamsters were used, divided into five groups (control, carcinogen only, green tea, curcumin, combination).
• Squamous cell carcinoma was chemically induced.
• Apoptosis, proliferation, and angiogenesis were assessed using flow cytometry, immunofluorescence, and immunohistochemistry.
• Statistical analysis was performed using ANOVA.

Main Results:

• The combination group demonstrated significantly increased apoptosis compared to controls.
• Green tea and curcumin treatments individually also increased apoptosis.
• Reduced red fluorescence in cell nuclei indicated suppressed proliferation.
• Microvessel density was significantly lower in treated groups compared to the positive control.

Conclusions:

• The combination of green tea and curcumin exhibits a significant chemopreventive effect against oral carcinogenesis.
• These natural compounds hold promise for the prevention of oral cancers.