Additional evidence on the efficacy of different Akirin vaccines assessed on Anopheles arabiensis (Diptera: Culicidae)

Parasites & Vectors

José de la Fuente¹  Marinela Contreras²  Ingrid Linnekugel³  Lizette L. Koekemoer⁴  Yael Dahan-Moss⁴  Blaženka D. Letinić⁴ 

[1] SaBio. Instituto de Investigacion en Recursos Cinegeticos IREC-CSIC-UCLM-JCCM, Ronda de Toledo s/n, 13005, Ciudad Real, Spain;Department of Veterinary Pathobiology, Center for Veterinary Health Sciences, Oklahoma State University, 74078, Stillwater, OK, USA;SaBio. Instituto de Investigacion en Recursos Cinegeticos IREC-CSIC-UCLM-JCCM, Ronda de Toledo s/n, 13005, Ciudad Real, Spain;Interdisciplinary Laboratory of Clinical Analysis, Regional Campus of International Excellence Campus Mare Nostrum, Interlab-UMU, University of Murcia, Espinardo, 30100, Murcia, Spain;South African Vaccine Producers Animal Unit, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa;Wits Research Institute for Malaria, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa;Centre for Emerging Zoonotic and Parasitic Diseases, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa;

关键词: Malaria;    Vector control;    Akirin;    Subolesin;    Immunisation;    Recombinant proteins;   

DOI  :  10.1186/s13071-021-04711-8

来源: Springer

【 摘 要 】

BackgroundAnopheles arabiensis is an opportunistic malaria vector that rests and feeds outdoors, circumventing current indoor vector control methods. Furthermore, this vector will readily feed on both animals and humans. Targeting this vector while feeding on animals can provide an additional intervention for the current vector control activities. Previous results have displayed the efficacy of using Subolesin/Akirin ortholog vaccines for the control of multiple ectoparasite infestations. This made Akirin a potential antigen for vaccine development against An. arabiensis.MethodsThe efficacy of three antigens, namely recombinant Akirin from An. arabiensis, recombinant Akirin from Aedes albopictus, and recombinant Q38 (Akirin/Subolesin chimera) were evaluated as novel interventions for An. arabiensis vector control. Immunisation trials were conducted based on the concept that mosquitoes feeding on vaccinated balb/c mice would ingest antibodies specific to the target antigen. The antibodies would interact with the target antigen in the arthropod vector, subsequently disrupting its function.ResultsAll three antigens successfully reduced An. arabiensis survival and reproductive capacities, with a vaccine efficacy of 68–73%.ConclusionsThese results were the first to show that hosts vaccinated with recombinant Akirin vaccines could develop a protective response against this outdoor malaria transmission vector, thus providing a step towards the development of a novel intervention for An. arabiensis vector control.Graphic Abstract

【 授权许可】

CC BY