Biomaterial Database

Testicular descent. III. The neonatal mouse gubernaculum shows rhythmic contraction in organ culture in response to calcitonin gene-related peptide. 1992

Y Momose, and A L Griffiths, and J M Hutson

Department of Surgical Research, Royal Children's Hospital Research Foundation, Melbourne, Australia.

The effects of calcitonin gene-related peptide (CGRP) and CGRP 8-37 on the neonatal mouse gubernaculum were examined in organ culture, with the aim of seeing whether CGRP has a direct effect on the gubernaculum. A total of 440 gubernacula were studied. Two hundred and fifty gubernacula were treated with CGRP in concentrations ranging from 0-714 nM/liter. With increasing doses of CGRP the percentage of gubernacula showing vigorous contraction increased from 18-50%. The total percentage of gubernacula showing any form of contraction increased from 76-96%. One hundred and fifty gubernacula were exposed to the CGRP analog CGRP 8-37. Increasing concentrations of CGRP 8-37 from 179-714 nM/liter decreased the rate of vigorous contraction from 18-4%. The percentage of gubernacula showing any degree of contraction decreased from 76-14%. Forty gubernacula removed from testicular feminization (TFM) mice were exposed to varying concentrations of CGRP. In the absence of exogenous CGRP no contractility was observed. By contrast, in the presence of CGRP the gubernacula showed vigorous contractility increasing from 38-90%. The total number of gubernacula showing contraction increased from 75-100%. These studies demonstrated that the neonatal mouse gubernaculum exhibits a high level of endogenous contractility, which can be enhanced in a dose responsive manner with exogenous CGRP. CGRP 8-37 caused a dose responsive inhibition. The androgen-insensitive gubernaculum from the TFM mouse showed no endogenous contraction, but on exposure to CGRP showed an enhanced rate of contractility. These results are consistent with the hypothesis that androgens may control gubernacular migration indirectly via release of CGRP from the genitofemoral nerve in the inguinoscrotal region. The failure of gubernacular motility in vitro and migration in vivo in the TFM mouse may indicate lack of CGRP release from the genitofemoral nerve.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009924	Organ Culture Techniques	A technique for maintenance or growth of animal organs in vitro. It refers to three-dimensional cultures of undisaggregated tissue retaining some or all of the histological features of the tissue in vivo. (Freshney, Culture of Animal Cells, 3d ed, p1)	Organ Culture,Culture Technique, Organ,Culture Techniques, Organ,Organ Culture Technique,Organ Cultures
D010446	Peptide Fragments	Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques.	Peptide Fragment,Fragment, Peptide,Fragments, Peptide
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000831	Animals, Newborn	Refers to animals in the period of time just after birth.	Animals, Neonatal,Animal, Neonatal,Animal, Newborn,Neonatal Animal,Neonatal Animals,Newborn Animal,Newborn Animals
D001696	Biomechanical Phenomena	The properties, processes, and behavior of biological systems under the action of mechanical forces.	Biomechanics,Kinematics,Biomechanic Phenomena,Mechanobiological Phenomena,Biomechanic,Biomechanic Phenomenas,Phenomena, Biomechanic,Phenomena, Biomechanical,Phenomena, Mechanobiological,Phenomenas, Biomechanic
D013734	Androgen-Insensitivity Syndrome	A disorder of sexual development transmitted as an X-linked recessive trait. These patients have a karyotype of 46,XY with end-organ resistance to androgen due to mutations in the androgen receptor (RECEPTORS, ANDROGEN) gene. Severity of the defect in receptor quantity or quality correlates with their phenotypes. In these genetic males, the phenotypic spectrum ranges from those with normal female external genitalia, through those with genital ambiguity as in Reifenstein Syndrome, to that of a normal male with INFERTILITY.	Testicular Feminization,AR Deficiency,Androgen Insensitivity Syndrome,Androgen Insensitivity, Partial,Androgen Receptor Deficiency,Androgen Resistance Syndrome,Androgen-Insensitivity Syndrome, Complete,Androgen-Insensitivity Syndrome, Partial,DHTR Deficiency,Dihydrotestosterone Receptor Deficiency,Male Pseudohermaphroditism Due to Androgen Insensitivity,Reifenstein Syndrome,Reifenstein's Syndrome,Testicular Feminization Syndrome,AR Deficiencies,Androgen Insensitivities, Partial,Androgen Insensitivity Syndrome, Complete,Androgen Insensitivity Syndrome, Partial,Androgen Insensitivity Syndromes,Androgen Receptor Deficiencies,Androgen Resistance Syndromes,Androgen-Insensitivity Syndromes,Androgen-Insensitivity Syndromes, Complete,Androgen-Insensitivity Syndromes, Partial,Complete Androgen-Insensitivity Syndrome,Complete Androgen-Insensitivity Syndromes,DHTR Deficiencies,Deficiencies, AR,Deficiencies, Androgen Receptor,Deficiencies, DHTR,Deficiencies, Dihydrotestosterone Receptor,Deficiency, AR,Deficiency, Androgen Receptor,Deficiency, DHTR,Deficiency, Dihydrotestosterone Receptor,Dihydrotestosterone Receptor Deficiencies,Feminization Syndrome, Testicular,Feminization Syndromes, Testicular,Feminization, Testicular,Feminizations, Testicular,Insensitivities, Partial Androgen,Insensitivity Syndrome, Androgen,Insensitivity Syndromes, Androgen,Insensitivity, Partial Androgen,Partial Androgen Insensitivities,Partial Androgen Insensitivity,Partial Androgen-Insensitivity Syndrome,Partial Androgen-Insensitivity Syndromes,Receptor Deficiencies, Androgen,Receptor Deficiencies, Dihydrotestosterone,Receptor Deficiency, Androgen,Receptor Deficiency, Dihydrotestosterone,Reifensteins Syndrome,Resistance Syndrome, Androgen,Resistance Syndromes, Androgen,Testicular Feminization Syndromes,Testicular Feminizations
D013737	Testis	The male gonad containing two functional parts: the SEMINIFEROUS TUBULES for the production and transport of male germ cells (SPERMATOGENESIS) and the interstitial compartment containing LEYDIG CELLS that produce ANDROGENS.	Testicles,Testes,Testicle
D015740	Calcitonin Gene-Related Peptide	A 37-amino acid peptide derived from the calcitonin gene. It occurs as a result of alternative processing of mRNA from the calcitonin gene. The neuropeptide is widely distributed in the brain, gut, perivascular nerves, and other tissue. The peptide produces multiple biological effects and has both circulatory and neurotransmitter modes of action. In particular, it is a potent endogenous vasodilator.	Calcitonin Gene-Related Peptide I,Calcitonin Gene-Related Peptide II,alpha-CGRP,alpha-Calcitonin Gene-Related Peptide,beta-CGRP,beta-Calcitonin Gene-Related Peptide,Calcitonin Gene Related Peptide,Calcitonin Gene Related Peptide I,Calcitonin Gene Related Peptide II,Gene-Related Peptide, Calcitonin,alpha Calcitonin Gene Related Peptide,beta Calcitonin Gene Related Peptide
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus