Title:Natural Plant Products Mediated Prevention of Cancer Facilitated
through Immune Suppression of Treg Cells
Volume: 23
Issue: 30
Author(s): Oishi Mukherjee, Sudeshna Rakshit, Geetha Shanmugan and Koustav Sarkar*
Affiliation:
- Department of Biotechnology, SRM Institute of Science and Technology, Kattankulathur, Chennai, Tamil Nadu,
603203, India
Keywords:
Regulatory T cell, Natural immunomodulators, Immunosuppression, Immunotherapy, Growth Factors, FoxP3, CD8+ T cells, Therapeutic target.
Abstract: Cancer is one of the leading causes of death, and numerous methods have been tested
and used to figure out an optimum way of treatment. Besides targeted therapy, immunotherapy
has proven to be effective by controlling certain immune cells. Traditional cancer therapy is met
with the consequences of adverse side effects that have been a major issue for treatment; hence, a
leap towards naturally occurring immunomodulators was taken to develop safer methods of treatment.
One of the major immune cells responsible for the growth of tumors is regulatory T cells
(Tregs). To maintain immunological homeostasis, Treg dampens abnormal immune responses to self
and non-self-antigens. The transcription factor FoxP3 is responsible for their lineage specification
and takes part in the production of immunosuppressive cytokines like IL10, IL35, and TGFb. This
helps cancer cells to proliferate without the restriction of different immune cells like CD8+T cells,
dendritic cells, monocytes/macrophages, B cells, and natural killer cells. Hence, targeting Tregs to
provide unhindered immunosurveillance has proven to be a breakthrough in cancer immunotherapy.
This review mainly focuses on some common naturally occurring immunomodulators derived
from plant products that have earned their place as immunotherapeutic agents, along with some of
their ability to suppress Tregs that can be used as an effective way to treat cancer.