Development of molecular methods to study hemocyte biology and functions in Aedes aegypti

dc.contributor.advisor Ryan C. Smith
dc.contributor.author Ramesh Kumar, Jyothsna
dc.contributor.department Entomology
dc.date 2019-12-10T21:56:12.000
dc.date.accessioned 2020-06-30T03:17:23Z
dc.date.available 2020-06-30T03:17:23Z
dc.date.copyright Sat Dec 01 00:00:00 UTC 2018
dc.date.embargo 2019-11-29
dc.date.issued 2018-01-01
dc.description.abstract <p>The mosquito innate immune system is a critical determinant of vector competence. Mosquito immune cells known as hemocytes serve primary roles in immune recognition and pathogen killing, with important functions in Anopheles gambiae that limit malaria parasite survival in the mosquito host. However, the role of mosquito hemocytes in antiviral defense has yet to be established. Previous studies suggest potential roles of hemocytes in arbovirus infection and dissemination in the mosquito host, yet these studies have been limited by the lack of genetic tools to assess the functional contributions of mosquito hemocytes. To approach these questions, we have identified potential genetic markers for mosquito hemocyte populations to study their biology and developed methods to chemically deplete phagocytic cell populations in Aedes aegypti to determine the functional contribution of these immune cells on arbovirus infection. Our results demonstrate that nimrod, peroxidasin and lozenge are potential candidate marker genes for granulocytes and oenocytoids respectively, that can be utilized to create transgenic constructs to label hemocytes. To enable the study of hemocyte functions, phagocytic cell populations were effectively depleted through chemical treatment as validated through light microscopy, reduced expression of hemocyte-specific genes, and impaired immune function following bacterial challenge. Analysis of subsets using flow cytometry argue for presence of additional subsets of hemocytes that vary in phagocytic ability and morphology. Current studies look to further develop these molecular tools to examine viral-host interactions and better understand the role of mosquito cellular immunity in shaping arbovirus infection and transmission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/17296/
dc.identifier.articleid 8303
dc.identifier.contextkey 15016551
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/17296
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/31479
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/17296/RameshKumar_iastate_0097M_17754.pdf|||Fri Jan 14 21:19:54 UTC 2022
dc.subject.disciplines Allergy and Immunology
dc.subject.disciplines Immunology and Infectious Disease
dc.subject.disciplines Medical Immunology
dc.subject.keywords Arbovirus
dc.subject.keywords Hemocytes
dc.subject.keywords Host pathogen interactions
dc.subject.keywords Innate immunity
dc.subject.keywords Mosquito
dc.subject.keywords Vector-borne disease
dc.title Development of molecular methods to study hemocyte biology and functions in Aedes aegypti
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication f47c8cad-50be-4fb0-8870-902ff536748c
thesis.degree.discipline Immunobiology
thesis.degree.level thesis
thesis.degree.name Master of Science
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