Rapid and Transient Upregulation of CCL11 (Eotaxin-1) in Mouse Ovary During Terminal Stages of Follicular Development



Yoshimitsu Kuwabara, Department of Obstetrics and Gynecology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan.

E-mail: kuwa@nms.ac.jp



This study aimed to investigate the regulation of expression, localization and physiological role of the CCL11/CCR3 axis in mouse ovary during the periovulatory period.

Method of study

CCL11/CCR3 expression in the mouse ovary after treatment with pregnant mare serum gonadotropin (PMSG) followed by human chorionic gonadotropin (hCG) 48 hr later was assessed in vivo and in 3-dimensional cultures in vitro.


Real-time RT-PCR analyses revealed transient CCL11 mRNA upregulation 6 hr after hCG treatment. Immunohistochemical staining of serial ovarian sections demonstrated overlapping expression of CCL11, CCR3 and CD31 endothelial cell marker in the theca-interstitial layer at 10 hr after hCG treatment. In vitro 3-dimensional cultures of periovulatory ovarian tissues demonstrated that treatment with anti-CCL11 neutralizing antibody significantly decreased CD31 transcript.


Gonadotropin surge leads to transient CCL11/CCR3 axis upregulation in the ovarian theca-interstitial layer, suggesting that it is involved in periovulatory physiological processes by affecting follicular vessels.