Summary
Abnormal growth regulation in lesional skin fibroblasts may be related to scleroderma pathogenesis. We report on the abnormal response of cultured fibroblasts derived from sclerotic lesions to various growth factors. We investigated the responses of skin fibroblasts (10 strains) and normal fibroblasts (9 strains) to the growth factors as PDGF, TGF-Β1, EGF and basic FGF. Experiments were conducted during the proliferation and confluent stages. PDGF, EGF and basic FGF stimulated fibroblast growth during the proliferation and confluent stages, but the response of scleroderma fibroblasts was significantly lower than that of normal fibroblasts. TGF-Β1 slightly stimulated confluent fibroblast growth and inhibited proliferating fibroblasts, and the response of scleroderma fibroblasts exceeded that of normal fibroblasts. The decreased response to growth-stimulating factors observed in scleroderma fibroblasts suggests that cultured fibroblasts derived from scleroderma lesions were already senescent because they have been activated by growth-stimulating factors and repeatedly divided in vivo. Thus, abnormal growth regulation of skin fibroblasts may be partially related to the pathogenesis of scleroderma.
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Takehara, K., Soma, Y., Igarashi, A. et al. Response of scleroderma fibroblasts to various growth factors. Arch Dermatol Res 283, 461–464 (1991). https://doi.org/10.1007/BF00371783
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DOI: https://doi.org/10.1007/BF00371783