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Related Experiment Videos

Vitamin A effect on tumor angiogenesis

R M Arensman, C J Stolar

    Journal of Pediatric Surgery
    |December 1, 1979
    PubMed
    Summary

    Vitamin A inhibits tumor growth by affecting blood vessel formation. Studies in mice and rabbits show vitamin A (retinoids) slows tumor development and prolongs survival by reducing vascularization.

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    Area of Science:

    • Oncology
    • Vascular Biology
    • Nutritional Science

    Background:

    • Tumor growth is dependent on angiogenesis (new blood vessel formation).
    • Vitamin A (retinoids) plays a role in cell differentiation and growth regulation.
    • The anti-tumor effects of vitamin A are not fully understood.

    Purpose of the Study:

    • To investigate the inhibitory effects of vitamin A on tumor establishment and growth in vivo.
    • To elucidate the mechanism by which vitamin A may influence tumor vascularization.

    Main Methods:

    • Two animal models were used: C57L/J hepatoma in C57L/J mice and V-2 carcinoma in New Zealand white rabbits.
    • Vitamin A was administered to tumor-bearing animals.
    • Tumor growth, host survival, and corneal vascular response were monitored.

    Main Results:

    • Vitamin A administration significantly slowed the growth of C57L/J hepatoma in mice, leading to prolonged host survival.
    • In rabbits, vitamin A injections reduced the vascular response in limbic vessels when V-2 carcinoma was implanted.
    • This suggests vitamin A inhibits tumor vascularization.

    Conclusions:

    • Vitamin A demonstrates an inhibitory effect on tumor establishment and growth in distinct animal models.
    • The mechanism appears to involve the modification of the normal vascular response to neoplastic tissue, thereby preventing tumor vascularization.

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