Tanshinone II A inhibits dendritic cell-mediated adaptive immunity: potential role in anti-atherosclerotic activity / 中国结合医学杂志
Chinese journal of integrative medicine
;
(12): 764-769, 2014.
Article
in English
| WPRIM
| ID: wpr-347111
ABSTRACT
<p><b>OBJECTIVE</b>Antigen-presenting cells such as monocytes and dendritic cells (DCs) stimulate T-cell proliferation and activation during adaptive immunity. This cellular interaction plays a role in the growth of atherosclerotic plaques. Tanshinone II A (TSN) had been shown to decrease the growth of atherosclerotic lesions. We therefore investigated the ability of TSN to inhibit human monocyte-derived DCs and their T-cellstimulatory capacity.</p><p><b>METHODS</b>DCs derived from human monocytes cultured with recombinant human interleukin (IL)-4 and recombinant human granulocyte-macrophage colony-stimulating factor were co-cultured with TSN and lipopolysaccharide for 48 h. Phosphate-buffered saline was used as a negative control. Activation markers and the capacity of DCs for endocytosis were measured by flow cytometry, and proinflammatory cytokines were measured by enzyme-linked immunosorbent assays. DCs were co-cultured with lymphocytes to measure T-cell proliferation and IL-2 secretion by mixed lymphocyte reactions.</p><p><b>RESULTS</b>TSN dose-dependently attenuated DC expression of costimulatory molecules (CD86), and decreased expression of major histocompatibility complex class II (human loukocyte antigen-DR) and adhesion molecules (CD54). Moreover, TSN reduced secretion of the proinflammatory cytokines IL-12 and IL-1 by human DCs, and restored the capacity for endocytosis. Finally, TSN-preincubated DCs showed a reduced capacity to stimulate T-cell proliferation and cytokine secretion.</p><p><b>CONCLUSIONS</b>TSN inhibits DC maturation and decreases the expression of proinflammatory cytokines, while impairing their capacity to stimulate T-cell proliferation and cytokine secretion. These effects may contribute to the influence of TSN on the progression of atherosclerotic lesions.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Pharmacology
/
Dendritic Cells
/
Lymphocyte Activation
/
Cell Membrane
/
Cytokines
/
Inflammation Mediators
/
Bodily Secretions
/
Abietanes
/
Endocytosis
Limits:
Humans
Language:
English
Journal:
Chinese journal of integrative medicine
Year:
2014
Type:
Article
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