Abstract:
:The expression of melanocortin MC(1) receptors on human peripheral lymphocyte subsets was analysed by flow cytometry using rabbit antibodies selective for the human MC(1) receptor and a panel of monoclonal antibodies against lymphocyte differentiation markers. The MC(1) receptor was found to be constitutively expressed on monocytes/macrophages, B-lymphocytes, natural killer (NK) cells and a subset of cytotoxic T-cells. Interestingly T-helper cells appeared to be essentially devoid of MC(1) receptors. The results were confirmed by RT-PCR which indicated strong expression of MC(1) receptor mRNA in CD14(+), CD19(+) and CD56(+) cells. However, only a faint RT-PCR signal was seen in CD3(+) cells, in line with the immuno-staining results that indicated that only part of the CD3(+) cells (i.e. some of the CD8(+) cells) expressed the MC(1) receptor. The MC(1) receptors' constitutive expression on immune cells with antigen-presenting and cytotoxic functions implies important roles for the melanocortic system in the modulation of immune responses.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Neumann Andersen G,Nagaeva O,Mandrika I,Petrovska R,Muceniece R,Mincheva-Nilsson L,Wikberg JEdoi
10.1046/j.1365-2249.2001.01604.xsubject
Has Abstractpub_date
2001-12-01 00:00:00pages
441-6issue
3eissn
0009-9104issn
1365-2249pii
1604journal_volume
126pub_type
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