Editor's statement TGF beta interaction with its receptor is known to affect EGF receptors. In this paper a functional biological association is established.
Summary
The stimulatory effects of transforming growth factor β (TGF-β) on epidermal growth factor (EGF)-dependent growth of adult and newborn human fibroblasts were investigated. EGF-stimulated growth in low serum of dermal fibroblasts from a 41 year-old adult (HSF-41) was less than half that of newborn foreskin fibroblasts (HFF). The EGF-stimulated growth of HFF after 55 population doublings (HFF-55) was similarly reduced. The decreased growth response to EGF of fibroblasts, agedin vivo andin vitro appeared to result principally from a decreased sensitivity to EGF due to a decreased number and affinity of high affinity EGF receptors (H-EGFR). Pre-incubation of HSF-41 and HFF-55 with 25 pM TGF-β enhanced the growth responses of these cells to EGF and increased the levels of high affinity EGF-binding by these cells Thus, the stimulation by TGF-β of EGF-dependent growth of human fibroblasts agedin vivo orin vitro is mediated by increased levels of high affinity EGF binding.
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This research was supported in part by a grant-in-aid for scientific research (61480388) and a special project research grant to Okayama University from the Japanese Ministry of Education, Science and Culture.
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Kawamoto, T., Nishi, M., Takahashi, K. et al. Stimulation by transforming growth factor-β of epidermal growth factor-dependent growth of aged human fibroblasts: Recovery of high affinity EGF receptors and growth stimulation by EGF. In Vitro Cell Dev Biol 25, 965–970 (1989). https://doi.org/10.1007/BF02624011
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DOI: https://doi.org/10.1007/BF02624011