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Titolo:
Cremaster muscle is not sexually dimorphic, but that from boys with undescended testis reflects alterations related to autonomic innervation
Autore:
Tanyel, FC; Erdem, S; Buyukpamukcu, N; Tan, E;
Indirizzi:
Hacettepe Univ, Med Ctr, Dept Pediat Surg, TR-06100 Ankara, Turkey Hacettepe Univ Ankara Turkey TR-06100 diat Surg, TR-06100 Ankara, Turkey Hacettepe Univ, Med Ctr, Dept Neurol, Neuromuscular Dis Res Lab, TR-06100 Ankara, Turkey Hacettepe Univ Ankara Turkey TR-06100 s Res Lab, TR-06100 Ankara, Turkey
Titolo Testata:
JOURNAL OF PEDIATRIC SURGERY
fascicolo: 6, volume: 36, anno: 2001,
pagine: 877 - 880
SICI:
0022-3468(200106)36:6<877:CMINSD>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEVATOR ANI MUSCLE; TESTICULAR DESCENT; FIBER TYPES; RAT; TESTOSTERONE; RECEPTORS; NEURONS;
Keywords:
testis; cryptorchidism; cremaster muscle; fiber types; autonomic nervous system;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Tanyel, FC Hacettepe Univ, Childrens Hosp, Dept Pediat Surg, TR-06100 Ankara, Turkey Hacettepe Univ Ankara Turkey TR-06100 TR-06100 Ankara, Turkey
Citazione:
F.C. Tanyel et al., "Cremaster muscle is not sexually dimorphic, but that from boys with undescended testis reflects alterations related to autonomic innervation", J PED SURG, 36(6), 2001, pp. 877-880

Abstract

Background/Purpose: The genitofemoral nerve and its motor neuron are knownto be sexually dimorphic. An association has been suggested to exist between antiandrogen-induced undescended testis and the genitofemoral nerve. Therefore, the cremaster muscles (CM) from boys and girls with inguinal herniaand boys with undescended testis were compared to evaluate the failed descent through sexual dimorphism. Methods: Samples of CM were obtained from 10 boys and 10 girls with inguinal hernia and 10 boys with undescended testis. Sections were stained for ATPase reactions after acid and alkaline preincubations, and for the expression of myosine heavy chains. The percentages of type 1 and type 2 fibers, and mean diameters of fibers according to the types were determined for each group. Values were compared through Mann-Whitney U test, and P values less than .05 were considered to be significant. Results: CM have mainly been composed of type 1 fibers. Distributions of type 1 and 2 fibers have not shown a difference among groups. Mean diametersof both type 1 and type 2 fibers from girls (P <.05), and mean diameter oftype 2 fibers from boys with undescended testis have been significantly smaller than those encountered in boys with inguinal hernia (P<.05). Conclusions: Although the mean diameter of type 1 fibers from boys with undescended testis has been as large as those encountered in boys with inguinal hernia, mean diameter of type 2 fibers has been as small as those encountered in girls. Among various reasons to selectively diminish the size of type 2 fibers, lack of beta adrenergic effect appears to be the most satisfactory explanation. J Pediatr Surg 36:877-880. Copyright (C) 2001 by W.B. Saunders Company.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 12:46:41