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Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro
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Bioactive compounds or metabolites from black raspberries modulate T lymphocyte proliferation, myeloid cell

Thomas A Mace1, Samantha A King, Zeenath Ameen

  • 1Division of Medical Oncology, Department of Internal Medicine, The Ohio State University, 302B Comprehensive Cancer Center, 400 W. 12th Ave., Columbus, OH, 43210, USA.

Cancer Immunology, Immunotherapy : CII
|June 5, 2014
PubMed

Insights

Black raspberries (BRB) and their metabolites impact immune cells, potentially inhibiting cancer progression. These natural compounds affect T cells and myeloid-derived suppressor cells, offering leads for cancer drug development.

Area of Science:

  • Natural product chemistry
  • Immunology
  • Cancer research

Background:

  • Black raspberries (BRB) possess anticancer properties, but their immune-modulating effects are underexplored.
  • Understanding BRB's impact on immune cells is crucial for cancer prevention and therapy.

Purpose of the Study:

  • To investigate the immunomodulatory effects of black raspberry extract (BRB-E) and its metabolites on immune cells.
  • To determine the impact of BRB components on T cell proliferation, myeloid-derived suppressor cells (MDSC), and STAT signaling pathways relevant to cancer.

Main Methods:

  • Treatment of human CD4(+) and CD8(+) T lymphocytes and MDSCs with BRB-E, Cyanidin-3-Rutinoside (C3R), and Quercitin-3-Rutinoside (Q3R).
  • Assessed T cell proliferation and viability, MDSC expansion and suppressive function.
  • Analyzed STAT3 and STAT5 phosphorylation via Western blotting after IL-6 and IL-2 stimulation.

Main Results:

  • BRB-E inhibited T cell proliferation and viability, and limited MDSC expansion and suppressive capacity.
  • BRB-E and its metabolites (C3R, Q3R) attenuated IL-6-mediated STAT3 signaling.
  • C3R and Q3R were less potent inhibitors of T cell viability and did not affect IL-2-induced STAT5 phosphorylation compared to BRB-E.

Conclusions:

  • Black raspberry extracts and their metabolites modulate immune cell functions relevant to cancer.
  • BRB phytochemicals impact T cells and MDSCs, suggesting potential for cancer immunotherapy and drug development.
  • Specific BRB components may serve as leads for developing targeted therapies affecting immune responses and STAT signaling.

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