Role of <i>Ixodes scapularis</i> Sphingomyelinase-Like Protein (IsSMase) in Tick Pathogen Interactions

<p>Arthropod-borne diseases are one of the major concerns throughout the world. <em>Ixodes scapularis</em> (hard tick) is one of the major vectors that is involved in arthropod-borne disease transmission. Langat virus (LGTV) is a model pathogen that is very similar to other medically important flaviviruses such as Tick-Borne Encephalitis virus (TBEV) and Powassan virus (POWV). Sphingomyelinase-like protein (IsSMase, a Sphingomyelinase D or SMase D, a venomous protein ortholog of spiders) is an enzyme present in ticks that helps to catalyze the hydrolysis of the sphingomyelin (cell membrane lipid) into phosphocholine and ceramide. The objective of our study is to delineate the role of IsSMase in exosome biogenesis upon LGTV infection in ticks. Our previous study showed that LGTV-infection enhanced the production and release of exosomes to mediate the transmission of flavi-viral proteins and infectious RNA genomes from the arthropod to the vertebrate host. Understanding the mechanism(s) of arthropod-borne flavivirus transmission via exosome biogenesis is very important. My MS thesis project explored the detailed role of IsSMase in tickborne viral replication and pathogenesis and provided molecular insights of viral modulated survival strategies in ticks. Our data, in specific, suggests an important role for IsSMase in regulating viral replication in ticks, and in general a mechanism for anti-viral pathways in medically important vectors.</p>

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Biological Sciences

Year dc:date.available

2020

Author dc:creator

• Regmi, Pravesh

Contributors dc:contributor

• Hameeda Sultana
• Emilia Oleszak
• Deborah Waller

• Ixodes scapularis ticks
• Langat virus
• Sphingomyelin
• Sphingomyelinase
• Biology
• Immunology and Infectious Disease
• Microbiology

Statement dc:rights

• <p>In Copyright. URI: <a href="http://rightsstatements.org/vocab/InC/1.0/">http://rightsstatements.org/vocab/InC/1.0/</a> This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).</p>

Identifier

9781082982057

OAI identifier oai:identifier

oai:digitalcommons.odu.edu:biology_etds-1111