Segregated responses of mammary gland development and vaginal opening to prepubertal genistein exposure in Bscl2(-/-) female mice with lipodystrophy.

Segregated responses of mammary gland development and vaginal opening to prepubertal genistein exposure in Bscl2(-/-) female mice with lipodystrophy.
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DOI:
10.1016/j.reprotox.2014.10.023
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发表时间:
2015-07
影响因子:
3.3
通讯作者:
Ye, Xiaoqin
Ye, Xiaoqin
中科院分区:
医学4区
文献类型:
--
作者:
Li, Rong;El Zowalaty, Ahmed E.;Chen, Weiqin;Dudley, Elizabeth A.;Ye, Xiaoqin

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Berardinelli-Seip 先天性脂肪营养不良 2 缺陷 (Bscl2−/−) 小鼠重现了人类 BSCL2 疾病的脂肪营养不良。在乳腺脂肪细胞和上皮细胞中检测到 Bscl2 编码的 seipin。出生后乳腺生长突增和阴道开口标志着雌性小鼠青春期的开始。 Bscl2−/− 雌性在 5 周龄时乳腺管较长且扩张,阴道开口延迟。青春期前暴露于 500 ppm 金雀异黄酮饮食会增加对照组和 Bscl2−/− 女性的乳腺面积并加速阴道张开。然而,金雀异黄素治疗会增加对照组的导管长度,但不会增加 Bscl2−/− 雌性的导管长度。青春期前金雀异黄素治疗和 Bscl2 缺陷均不会影响 5 周龄乳腺中磷酸雌激素受体 α 或孕激素受体的表达模式。有趣的是,Bscl2 缺陷会特异性降低乳腺导管上皮中雌激素受体 β 的表达。总之,Bscl2−/− 女性加速了产后乳腺导管的发育,但延迟了阴道的开放;他们对青春期前金雀异黄素治疗的乳腺发育和阴道开口表现出不同的反应。
Berardinelli-Seip congenital lipodystrophy 2-deficient (Bscl2−/−) mice recapitulate human BSCL2 disease with lipodystrophy. Bscl2-encoded seipin is detected in adipocytes and epithelium of mammary gland. Postnatal mammary gland growth spurt and vaginal opening signify pubertal onset in female mice. Bscl2−/− females have longer and dilated mammary gland ducts at 5-week old and delayed vaginal opening. Prepubertal exposure to 500 ppm genistein diet increases mammary gland area and accelerates vaginal opening in both control and Bscl2−/− females. However, genistein treatment increases ductal length in control but not Bscl2−/− females. Neither prepubertal genistein treatment nor Bscl2-deficiency affects phospho-estrogen receptor α or progesterone receptor expression patterns in 5-week old mammary gland. Interestingly, Bscl2-deficiency specifically reduces estrogen receptor β expression in mammary gland ductal epithelium. In summary, Bscl2−/− females have accelerated postnatal mammary ductal development but delayed vaginal opening; they display segregated responses in mammary gland development and vaginal opening to prepubertal genistein treatment.
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