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Explants of non-pregnant human cervix in culture for 10 days spontaneously synthesized collagenolytic enzymes with dissolved the collagen in the tissue, resulting in the release of hydroxyproline-containing peptides. Progesterone at 8 X 10(-7) M and oestradiol-17 beta at 4 X 10(-6) M reduced this breakdown by 50%, but oestradiol-17 beta was only inhibitory if the tissue was maintained in an oestrogen-containing environment throughout the preparation of the tissue explants. We conclude that the connective tissue matrix of the human cervix is partly under hormonal control.

Regulation of collagen dissolution in the human cervix by oestradiol-17 and progesterone