title: Enhancement of squamous cell development in cultured skin by cyclic adenine nucleotide and prostaglandins.
abstract: The present study tests the hypothesis that agents known to elevate the level of intracellular cyclic adenine nucleotide may direct different epithelial cells onto a pathway of epidermoid (squamous) development and differentiation. We report here that the mixture of dibutyryl cyclic AMP (dbcAMP), prostaglandins E1, E2 and B1 (PG E1, E2, B1), and papaverine (pap) enhances the rate of normal squamous cell development in organ-cultured skin of chick embryos. The three components may act synergistically to elevate the level of intracellular cyclic adenine nucleotide. We recently reported that the same group of agents induces abnormal development (squamous metaplasia) and aberrant differentiation (keratin production) in the normally cuboidal epithelium of cultured whole mammary glands of mice [1]. Thus, dbcAMP, PG E1, E2, B1, and pap are effective in enhancing normal squamous cell development and also in inducing squamous metaplasia de novo in the epithelial components of two different organs of embryonic and adult animals of two classes of vertebrates. The combined findings are suggestive that cyclic adenine nucleotide together with the prostaglandins may act generally on diverse types of epithelia to bring about squamous cell development and a differentiation marked by keratin production.
mesh_terms: D000450:Aldosterone / Q000494:pharmacology; D000818:Animals; D003994:Bucladesine / Q000494:pharmacology*; D002454:Cell Differentiation / Q000187:drug effects*; D002478:Cells, Cultured; D002642:Chick Embryo; D006152:Cyclic GMP / Q000031:analogs & derivatives*; D003995:Dibutyryl Cyclic GMP / Q000494:pharmacology*; D007700:Kinetics; D011388:Prolactin / Q000494:pharmacology; D011453:Prostaglandins / Q000494:pharmacology*; D012867:Skin / Q000187:drug effects; D012879:Skin Physiological Phenomena
chemical_list: D011453:Prostaglandins; D003995:Dibutyryl Cyclic GMP; D000450:Aldosterone; D003994:Bucladesine; D011388:Prolactin; D006152:Cyclic GMP