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Follicular atresia during Dacus oleae oogenesis

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Nezis, I. P., Stravopodis, Dimitrios J., Margaritis, Lukas H. and Papassideri, Issidora S. (2006) Follicular atresia during Dacus oleae oogenesis. Journal of Insect Physiology, Volume 52 (Number 3). pp. 282-290. doi:10.1016/j.jinsphys.2005.11.007 ISSN 0022-1910.

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Official URL: http://dx.doi.org/10.1016/j.jinsphys.2005.11.007

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Abstract

Programmed cell death, constitutes a common fundamental incident that occurs during oogenesis in a variety of different animals. It plays a significant role in the maturation process of the female gamete and also in the removal of abnormal and superfluous cells at certain checkpoints of development. In the present study, we demonstrate the existence of follicular atresia during mid-oogenesis in the olive fruit fly Dacus oleae (Tephritidae). The number of atretic follicles increases following the age of the fly, suggesting for the presence of an age-susceptible process. The atretic follicles contain nurse cells that exhibit chromatin condensation, DNA fragmentation and actin cytoskeleton alterations, as revealed by propidium iodide staining, TUNEL labeling and phalloidin-FITC staining. Conventional light and electron microscopy disclose that the nurse cell remnants are phagocytosed by the adjacent follicle cells. The follicular epithelium also eliminates the oocyte through phagocytosis, resulting to an egg chamber with no compartmentalized organization. The data presented herein are very similar compared to previous reported results in other Diptera species, strongly suggesting the occurrence of a phylogenetically conserved mechanism of follicular atresia. All these observations also support the notion that mid-oogenesis in D. oleae may be the critical regulation point at which superfluous and defective egg chambers are selectively eliminated before they reach maturity.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- )
Journal or Publication Title: Journal of Insect Physiology
Publisher: Pergamon
ISSN: 0022-1910
Official Date: April 2006
Dates:
DateEvent
April 2006Published
Volume: Volume 52
Number: Number 3
Page Range: pp. 282-290
DOI: 10.1016/j.jinsphys.2005.11.007
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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