Abstract:
:Human mast cells in adult tissues have been thought to have limited, if any, proliferative potential. The current study examined mast cells obtained from adult skin and cultured in serum-free medium with recombinant human stem cell factor. During the first 4 weeks of culture, the percentages of mast cells increased from 10 to almost 100. After 8 weeks, a 150-fold increase in the number of mast cells was observed. When freshly dispersed mast cells were individually sorted onto human fibroblast monolayers and cultured for 3 weeks, one or more mast cells were detected in about two thirds of the wells, and in about two thirds of these wells the surviving mast cells showed evidence of proliferation, indicating most mast cells in skin can proliferate. Such mast cells all expressed high surface levels of Kit and Fc epsilon RI, each of which were functional, indicating IgE was not required for Fc epsilon RI expression on mast cells. Such mast cells also retained the MC(TC) protease phenotype of mast cells that normally reside in the dermis. After 4 to 8 weeks of culture these mast cells degranulated in response to substance P and compound 48/80, characteristics of skin-derived mast cells that persist outside of the cutaneous microenvironment. (Blood. 2001;97:2045-2052)
journal_name
Bloodjournal_title
Bloodauthors
Kambe N,Kambe M,Kochan JP,Schwartz LBdoi
10.1182/blood.v97.7.2045subject
Has Abstractpub_date
2001-04-01 00:00:00pages
2045-52issue
7eissn
0006-4971issn
1528-0020journal_volume
97pub_type
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