IMMUNOCYTOCHEMICAL LOCALIZATION OF TRANSFORMING GROWTH-FACTOR-ALPHA AND EPIDERMAL GROWTH-FACTOR RECEPTOR IN HUMAN FALLOPIAN-TUBES AND CUMULUS CELLS

PROBLEM: Transforming growth factor-alpha (TGF-alpha) has been shown t o be a potent stimulant of oocyte maturation and embryonic development . The role of maternal growth factors and their mechanism of action in early mammalian development is not well understood. METHOD: In this s tudy, the presence of TGF-alpha and epidermal growth factor receptor ( EGF-R) in human cumulus cells and fallopian tubes was investigated by immunocytochemical techniques. RESULTS: The fallopian tube showed inte nse staining for TGF-alpha in the apical region of the epithelial cell s, and the cumulus cells showed intense staining for EGF-R on cell mem branes. CONCLUSION: The presence of TGF-alpha in the fallopian tube ep ithelium and its receptor on cumulus cells suggest a paracrine mechani sm between maternal growth factors and the developing embryo.