Role of angiogenic factors of herbal origin in regulation of molecular pathways that control tumor angiogenesis

Abstract

The formation of blood capillaries to sustain development and growth of new tissues is referred to as angiogenesis. Angiogenesis is pivotal in both carcinogenesis and metastasis since capillaries are the sole source of supplying nutrients and oxygen to the proliferating tumor cells; therefore, this dependency of tumor growth on angiogenesis challenges researchers to halt tumor growth by targeting angiogenesis with the help of either synthetic or natural inhibitors. Many synthetic inhibitors of angiogenesis have not only come into force but also resulted in some severe adverse effects. Natural compounds may effectively fit into this condition and possibly decrease the time of treatment. In the recent past, literature is replete with evidences advocating the usefulness of natural compounds that target multiple biochemical pathways. The additional advantage of natural compounds is that their active principles interact with one another and work synergistically to give more meaningful and reliable effects than individual principle. Hence, if we are somehow able to combine more than two natural compounds, then it may be possible to enhance their potential by many folds, which shall prove to be very effective in combating tumor angiogenesis. This review shall discuss the concept of angiogenesis, molecular pathways, and angiogenic inhibitors and their specific targets and potential of natural compounds to greatly enhance the current knowledge of angiogenesis-inhibiting factors.

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