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J Embryol Exp Morphol

Title:		"Hormonal control of head-wart development in the snail, Euhadra peliomphala"
Author(s):		Takeda N;
Address:
Journal Title:		J Embryol Exp Morphol
Year:		1980
Volume:		60
Issue:
Page Number:		57 - 69
DOI:
ISSN/ISBN:		0022-0752 (Print) 0022-0752 (Linking)
Abstract:		"The terrestrial snail, Euhadra peliomphala, has a peculiar organ between the optic tentacles named the head-wart, which releases a sex pheromone just before courtship. The development of the head-wart was closely correlated with the sexual maturity of the snail. Castration led to the atrophy of the head-wart. Subsequent injection of hermaphrodite gland homogenate into the body cavity of castrated individuals induced the development of the head-wart. The peripheral regions of the acini in the hermaphrodite gland showed a positive reaction for 3 beta-hydroxy steroid dehydrogenase. Furthermore, preliminary radioimmunoassay also showed that the hermaphrodite gland of the snail contained testosterone and estradiol. When the immature head-wart was cultured for 10 days in a medium containing testosterone and estradiol respectively, development of the head-wart was found only in medium containing testosterone. From these results, it is concluded that head-wart development in the snail, Euhadra peliomphala, is under direct control from the hermaphrodite gland, probably by means of testosterone"
Keywords:		Animals Castration Epithelial Cells Estradiol/physiology Gonadal Steroid Hormones/*physiology Head/cytology/growth & development Organ Culture Techniques Sexual Maturation Snails/*growth & development Testosterone/physiology;
Notes:		"MedlineTakeda, N eng Research Support, Non-U.S. Gov't England 1980/12/01 J Embryol Exp Morphol. 1980 Dec; 60:57-69"