A testis-expressing heme peroxidase HPX12 regulates male fertility in the mosquito Anopheles stephensi

Autor: Seena Kumari, Sanjay Tevatiya, Jyoti Rani, Tanwee Das De, Charu Chauhan, Punita Sharma, Rajkumar Sah, Shailja Singh, Kailash C. Pandey, Veena Pande, Rajnikant Dixit
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Scientific Reports, Vol 12, Iss 1, Pp 1-13 (2022)
Druh dokumentu: article
ISSN: 2045-2322
DOI: 10.1038/s41598-022-06531-x
Popis: Abstract In vertebrates dysregulation of the antioxidant defense system has a detrimental impact on male fertility and reproductive physiology. However, in insects, especially mosquitoes the importance of sperm quality has been poorly studied. Since long-term storage of healthy and viable sperm earmarks male reproductive competency, we tested whether the heme peroxidase, a member of antioxidant enzyme family proteins, and abundantly expressed in the testis, also influence male fertility in the mosquito An. stephensi. Here, we show that a heme peroxidase 12 (HPX12), is an important cellular factor to protect the sperms from oxidative stress, and maintains semen quality in the male mosquito reproductive organ. We demonstrate that knockdown of the HPX12 not only impairs the sperm parameters such as motility, viability but also causes a significant down-regulation of MAG expressing transcripts such as ASTEI02706, ASTEI00744, ASTEI10266, likely encoding putative Accessory gland proteins. Mating with HPX12 knockdown male mosquitoes, resulted in ~ 50% reduction in egg-laying, coupled with diminished larval hatchability of a gravid female mosquito. Our data further outlines that increased ROS in the HPX12 mRNA depleted mosquitoes is the ultimate cause of sperm disabilities both qualitatively as well as quantitatively. Our data provide evidence that testis expressing AsHPX12 is crucial for maintaining optimal homeostasis for storing and protecting healthy sperms in the male mosquito’s reproductive organs. Since, high reproductive capacity directly influences the mosquito population, manipulating male mosquito reproductive physiology could be an attractive tool to combat vector-borne diseases.
Databáze: Directory of Open Access Journals
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