scholarly journals Effects of active bufadienolide compounds on human cancer cells and CD4+CD25+Foxp3+ regulatory T cells in mitogen-activated human peripheral blood mononuclear cells

2016 ◽  
Vol 36 (3) ◽  
pp. 1377-1384 ◽  
Author(s):  
Bo Yuan ◽  
Jing He ◽  
Keishi Kisoh ◽  
Hideki Hayashi ◽  
Sachiko Tanaka ◽  
...  
Keyword(s):  
T Cells ◽  
Cancer Cells ◽  
Peripheral Blood Mononuclear Cells ◽  
Peripheral Blood ◽  
Mononuclear Cells ◽  
Human Cancer ◽  
Human Peripheral Blood ◽  
Peripheral Blood Mononuclear ◽  
Human Cancer Cells ◽  
Blood Mononuclear Cells

scholarly journals Distribution of integrins on human peripheral blood mononuclear cells

Blood ◽  
1989 ◽  
Vol 74 (4) ◽  
pp. 1348-1354 ◽  
Author(s):  
HG Klingemann ◽  
S Dedhar
Keyword(s):  
T Cells ◽  
B Cells ◽  
Peripheral Blood Mononuclear Cells ◽  
Peripheral Blood ◽  
Mononuclear Cells ◽  
Human Peripheral Blood ◽  
Peptide Sequence ◽  
Peripheral Blood Mononuclear ◽  
Blood Mononuclear Cells ◽  
Beta 1 Integrin

Abstract The receptors for fibronectin (FN-R) and vitronectin (VN-R) belong to a family of integral membrane glycoproteins known to be involved in cell- extracellular matrix and cell-cell interactions named integrins (FN-R = beta 1 integrin and VN-R = beta 3 integrin). Adhesion studies using FN- coated plastic dishes and highly purified subpopulations of peripheral blood mononuclear cells (PBMCs) showed a strong binding of monocytes and T lymphocytes to FN but virtually no binding of B cells to FN. Binding of monocytes and T cells to FN could be partially inhibited by a hexapeptide (GRGDSP) containing the adhesive peptide sequence Arg-Gly- Asp (RGD) as well as by an anti-FN-R antibody. The distribution of beta 1 and beta 3 integrin complexes on PBMCs was characterized by immunoprecipitation of detergent extracts of 125I-labeled cells using polyclonal antibodies against these two receptors. Two surface polypeptides corresponding to the alpha and beta chains of FN-R and VN- R were found on all three cell types. To characterize these receptors further, monoclonal antibodies (MoAbs) against the very late antigens (VLAs) 1, 3, and 5 were used for immunoprecipitation studies. Monocytes and T cells reacted with VLA 5 that was previously identified as the human FN receptor, whereas no labeling with anti-VLA 5 could be shown for B cells. When cell populations were cultured in 10% human serum for 24 hours, an increase in beta 1-integrin+ monocytes and T cells was observed. The number of beta 3-integrin+ cells remained essentially unchanged. The presence of beta 1 and beta 3 integrins on monocytes as well as on T and B lymphocytes may be of significance in the ability of these cells to interact with each other and participate in hematopoiesis and certain immune reactions.

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