Directed migration of Ascogregarina taiwanensis (Apicomplexa: Lecudinidae) in its natural host Aedes albopictus (Diptera: Culicidae)

W. J. Chen*, M. H. Fan-Chiang

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

12 引文 斯高帕斯(Scopus)

摘要

Directed migration of trophozoites from the midgut toward the Malpighian tubules is essential for Ascogregarina taiwanensis (Apicomplexa; Lecudinidae) to complete its developmental cycle within the natural host Aedes albopictus. We have obtained a 275-bp actin cDNA fragment amplified from extracted mRNAs of migrating trophozoites, suggesting the involvement of actin in trophozoite motility, Down-regulation on the migration of the trophozoite was seen in mosquito larvae fed with cytochalasin D, ML-7, and BDM, indicating that myosin, in the form of an actomyosin system, may also be involved in driving motility of the trophozoite. The "protruding apparatus" (PA) formed at the anterior end of trophozoites during the migrating stage had significant deposits of actin by immunofluorescent microscopy. Moreover, PA formation was enhanced in response to elevated levels of 20-hydroxyecdysone (20-HE) in cultures of alimentary canals in which the trophozite was contained. Thus, 20-HE may also promote expression of actin and perhaps myosin simultaneously.

原文英語
頁(從 - 到)537-541
頁數5
期刊Journal of Eukaryotic Microbiology
48
發行號5
DOIs
出版狀態已出版 - 2001

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