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Titolo:
TOWARDS A RATIONAL TERMINOLOGY IN THE STUDY OF THE GUBERNACULUM TESTIS - ARGUMENTS IN SUPPORT OF THE NOTION THAT THE CREMASTERIC SAC SHOULDBE CONSIDERED THE GUBERNACULUM IN POSTNATAL RATS AND OTHER MAMMALS
Autore:
VANDERSCHOOT P;
Indirizzi:
ERASMUS UNIV ROTTERDAM,FAC MED & HLTH SCI,DEPT ENDOCRINOL & REPROD,POB 1738 NL-3000 DR ROTTERDAM NETHERLANDS
Titolo Testata:
Journal of Anatomy
, volume: 189, anno: 1996,
parte:, 1
pagine: 97 - 108
SICI:
0021-8782(1996)189:<97:TARTIT>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
TESTICULAR DESCENT; ANDROGEN RECEPTOR; PROLIFERATION; ANTIANDROGEN; HORMONE; CELLS; PIG;
Keywords:
TESTICULAR DESCENT; GENITAL DEVELOPMENT; CRYPTORCHIDISM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
52
Recensione:
Indirizzi per estratti:
Citazione:
P. Vanderschoot, "TOWARDS A RATIONAL TERMINOLOGY IN THE STUDY OF THE GUBERNACULUM TESTIS - ARGUMENTS IN SUPPORT OF THE NOTION THAT THE CREMASTERIC SAC SHOULDBE CONSIDERED THE GUBERNACULUM IN POSTNATAL RATS AND OTHER MAMMALS", Journal of Anatomy, 189, 1996, pp. 97-108

Abstract

There is need for a consistent definition of structures caudal to thetestis that variously are termed 'gubernaculum testis' as a basis forunderstanding the emergence and sexually dimorphic further growth anddifferentiation of this specifically mammalian structure. Rodent fetuses undergo a stage of development during which there is almost complete unanimity as to the definition of the 'gubernaculum' as a papilla-like structure (often called conus inguinalis) protruding from the areaof the internal inguinal ring. This structure shows at least 3 readily distinguishable components before birth. Postnatally, the papilla-like gubernaculum starts to undergo inversion to become the tunica of the sac-like processus vaginalis. The 3 components of the fetal gubernaculum develop further uninterruptedly, but with a different spatial arrangement, as parts of the wall of a sac rather than as parts of a papilla-like structure. Comparison of this process in rodents with that inother mammals !pig, horse, man) revealed an essentially identical emergence of a papilla-shaped gubernaculum with similar constituents. Initial development of the processus vaginalis also began with the inversion of the gubernacular papilla. Cattle fetuses appeared exceptional as outgrowth of the processus vaginalis occurred without a preceding papilla-shaped gubernaculum in the area of the inner inguinal ring. The findings lead to the following conclusions. (1) In rodents, the whole of the postnatally developing processus vaginalis, including thereforeits cremasteric muscles but without the attached genital mesentery, is to be viewed as the male postnatal gubernaculum. Sexual differentiation of the gubernacular primordia includes a sex-specific effect on the morphogenesis of all. constituents of the processus vaginalis sac including cremasteric muscle cells. (2) Gubernacular growth and differentiation appear essentially a uniform process throughout the placentalia mammalian class I only quantitative differences occur in the extent of initial development of an intra-abdominal conus inguinalis and later cremaster muscles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 18:42:37