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salivary gland infection

Transient knockdown of Anopheles stephensi LRIM1 using RNAi increases Plasmodium falciparum sporozoite salivary gland infections

June 30, 2021 - 12:23 -- Open Access
Peter F. Billingsley, Kasim I. George, Abraham G. Eappen, Robert A. Harrell II, Robert Alford, Tao Li, Sumana Chakravarty, B. Kim Lee Sim, Stephen L. Hoffman and David A. O’Brochta
Malaria Journal 2021 20:284, 26 June 2021

Plasmodium falciparum (Pf) sporozoites (PfSPZ) can be administered as a highly protective vaccine conferring the highest protection seen to date. Sanaria® PfSPZ vaccines are produced using aseptically reared Anopheles stephensi mosquitoes. The bionomics of sporogonic development of P. falciparum in A. stephensi to fully mature salivary gland PfSPZ is thought to be modulated by several components of the mosquito innate immune system. In order to increase salivary gland PfSPZ infections in A. stephensi and thereby increase vaccine production efficiency, a gene knock down approach was used to investigate the activity of the immune deficiency (IMD) signaling pathway downstream effector leucine-rich repeat immune molecule 1 (LRIM1), an antagonist to Plasmodium development.

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