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Expression of platelet‐derived growth factor (PDGF)‐A, PDGF‐B and the PDGF‐alpha receptor, but not the PDGF‐beta receptor, in human malignant melanoma in vivo
Author(s) -
BARNHILL R.L.,
XIAO M.,
GRAVES D.,
ANTONIADES H.N.
Publication year - 1996
Publication title -
british journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.304
H-Index - 179
eISSN - 1365-2133
pISSN - 0007-0963
DOI - 10.1046/j.1365-2133.1996.d01-1092.x
Subject(s) - platelet derived growth factor receptor , platelet derived growth factor , autocrine signalling , cancer research , growth factor , immunohistochemistry , receptor , biology , melanoma , medicine , endocrinology , pathology
SUMMARY There has been considerable interest in the potential role of growth fctclors in the initiation and development of cutaneous malignant melanoma (CMM). Platelet‐derived growth factor (PDGF) has been shown to be secreted by melanoma cell lines and by metastatic melanoma in vivo. PDGF also has been reported to stimulate the development of tumour stroma and new blood vessels. We studied the expression of PDGF and its receptors by both immunohistt)chcmistry (IHC) and in situ hybridization (ISH) in primary and metastatic melanoma and in normal skin specimens. Cryostat sections were incubated with 35 S‐labelled riboprobes and antibodies for PDGF‐AA. PDGF‐alpha receptor. PDGF‐BB and PDGF‐beta receptor. Both primary and metastatic melanoma exhibited significant expression of PDGF‐AA. PDGF‐BB and PDGF‐alpha receptor by both IHC and ISH. compared with only background expression in normal skin. We did not observe expression of PDGF‐beta receptor in melanoma. Our results suggest that PDGF may function as an autocrine growth factor, as well as an angiogenesis factor, in CMM tumour development. This expression of the PDGF‐alpha receptor rather than the beta receptor may be unique among solid tumours.

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