Identification of epidermal growth factor-like activity in human male reproductive tissues and fluids

• Published in: The journal of clinical endocrinology and metabolism Vol. 58; no. 4; p. 589
• Main Authors: Elson, S D, Browne, C A, Thorburn, G D
• Format: Journal Article
• Language: English
• Published: United States 01-04-1984
• Subjects: Aged; Animals; Chromatography, High Pressure Liquid; Epidermal Growth Factor - isolation & purification; Epididymis - analysis; Genitalia, Male - analysis; Humans; Male; Mice; Microsomes, Liver - metabolism; Molecular Weight; Prostate - analysis; Radioligand Assay; Rats; Rats, Inbred Strains; Receptor, Epidermal Growth Factor; Receptors, Cell Surface - metabolism; Semen - analysis; Seminal Vesicles - analysis; Testis - analysis
• ISSN: 0021-972X
• DOI: 10.1210/jcem-58-4-589

Epidermal growth factor-like activity (EGF-LA) has been detected in human seminal plasma in concentrations of 5-150 ngeq/ml (36.4 +/- 2.1, mean +/- SEM), using a heterologous RRA with murine EGF. The samples were obtained from normal, subfertile and azoospermic men, aged 21-50 yr. No correlation was found between EGF concentration and age of donor, sperm count, sperm motility, or period of sexual abstinence before sample collection. High performance liquid chromatography of the seminal plasma resulted in a main peak of EGF-LA which eluted at 29% acetonitrile, compared to 33% for murine EGF. Microsomal membranes were prepared from several tissues from the human male reproductive tract and were tested for their ability to bind radioiodinated murine EGF. Specific EGF binding activity was detectable in testicular membrane preparations but was not detectable in membranes prepared from human prostate, seminal vesicle, epididymis, or spermatozoa. Endogenous EGF-LA was detectable in human testis, seminal vesicle, prostate, and epididymis.