[Establishment of cryptorchid infertile models by postnatal injection of estradiol in mice].
Zhonghua Nan Ke Xue
; 19(1): 19-23, 2013 Jan.
Article
en Zh
| MEDLINE
| ID: mdl-23469656
ABSTRACT
OBJECTIVE:
To investigate the incidence and spermatogenesis of cryptorchid testes induced by postnatal injection of estradiol.METHODS:
Ninety male newborn Balb/C mice were randomly divided into an experimental (n = 60), a solvent control (n = 20) and a normal control group (n = 10). The experimental mice were again assigned to a 4-week, a 6-week, an 8-week, and a 10-week subgroup, and injected subcutaneously with 17-beta estradiol (5 microg/d) from 3 to 28, 3 to 42, 3 to 56 and 3 to 70 days after birth, respectively. The incidence of cryptorchidism and morphological changes of the testes were observed at 2 weeks after drug withdrawal.RESULTS:
The incidence rates of cryptorchidism in the 4-, 6-, 8- and 10-week groups were 0%, 26.7%, 60% and 60%, respectively, but no cryptorchidism occurred in the solvent and normal control groups. The 4- and 6-week groups showed autonomous descent of the cryptorchid testes and recovery of spermatogenesis after drug withdrawal. The models became stable and no spermatogenesis recovery was observed after 8 weeks of continuous medication.CONCLUSION:
Stable cryptorchid infertile models can be established in mice by postnatally continuous injection of estradiol for over 8 weeks.
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Colección:
01-internacional
Asunto principal:
Criptorquidismo
/
Estradiol
/
Infertilidad Masculina
Límite:
Animals
Idioma:
Zh
Revista:
Zhonghua Nan Ke Xue
Asunto de la revista:
MEDICINA REPRODUTIVA
Año:
2013
Tipo del documento:
Article
País de afiliación:
China