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• W4310530534 endingPage "e0278484" @default.
• W4310530534 startingPage "e0278484" @default.
• W4310530534 abstract "Key behaviours, physiologies and gene expressions in Anopheles mosquitoes impact the transmission of Plasmodium . Such mosquito factors are rhythmic to closely follow diel rhythms. Here, we set to explore the impact of the mosquito circadian rhythm on the tripartite interaction between the vector, the parasite and the midgut microbiota, and investigate how this may affect the parasite infection outcomes. We assess Plasmodium falciparum infection prevalence and intensity, as a proxy for gametocyte infectivity, in Anopheles gambiae mosquitoes that received a gametocyte-containing bloodfeed and measure the abundance of the midgut microbiota at different times of the mosquito rearing light-dark cycle. Gametocyte infectivity is also compared in mosquitoes reared and maintained under a reversed light-dark regime. The effect of the circadian clock on the infection outcome is also investigated through silencing of the CLOCK gene that is central in the regulation of animal circadian rhythms. The results reveal that the A . gambiae circadian cycle plays a key role in the intensity of infection of P . falciparum gametocytes. We show that parasite gametocytes are more infectious during the night-time, where standard membrane feeding assays (SMFAs) at different time points in the mosquito natural circadian rhythm demonstrate that gametocytes are more infectious when ingested at midnight than midday. When mosquitoes were cultured under a reversed light/dark regime, disrupting their natural physiological homeostasis, and infected with P . falciparum at evening hours, the infection intensity and prevalence were significantly decreased. Similar results were obtained in mosquitoes reared under the standard light/dark regime upon silencing of CLOCK , a key regulator of the circadian rhythm, highlighting the importance of the circadian rhythm for the mosquito vectorial capacity. At that time, the mosquito midgut microbiota load is significantly reduced, while the expression of lysozyme C-1 ( LYSC -1) is elevated, which is involved in both the immune response and microbiota digestion. We conclude that the tripartite interactions between the mosquito vector, the malaria parasite and the mosquito gut microbiota are finely tuned to support and maintain malaria transmission. Our data add to the knowledge framework required for designing appropriate and biologically relevant SMFA protocols." @default.
• W4310530534 created "2022-12-11" @default.
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• W4310530534 date "2022-12-01" @default.
• W4310530534 modified "2023-10-14" @default.
• W4310530534 title "The circadian clock modulates Anopheles gambiae infection with Plasmodium falciparum" @default.
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• W4310530534 doi "https://doi.org/10.1371/journal.pone.0278484" @default.
• W4310530534 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36454885" @default.
• W4310530534 hasPublicationYear "2022" @default.
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