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Impact of hypermutable sequences on microbial elicitation and evasion of host immune responses

  • Full or part time
  • Application Deadline
    Applications accepted all year round
  • Self-Funded PhD Students Only
    Self-Funded PhD Students Only

About This PhD Project

Project Description

Non-typeable Haemophilus influenzae (NTHi) cause multiple human diseases including otitis media, the commonest bacterial infection in children. This disease involves influxes of host immune modulators into the middle ear in response to bacterial infection1. Infections are often chronic due to poor antibiotic efficacy and ineffective immune responses. Multiple genes of NTHi undergo phase variation (PV) mediated by mutations in repetitive simple sequence DNA tracts. PV changes the expression of virulence determinants, such as lipopolysaccharide epitopes and iron-binding proteins, and allows the bacteria to evade or manipulate host immune responses2.

This project aims to determine how PV controls elicitation of host immune responses, survival of killing by immune effectors and induction of disease symptoms. The project will involve PCR-based analysis of repetitive DNA to monitor PV; engineering of mutant strains; assaying disease phenotypes in infection models such as interaction of bacteria with immune and epithelial cells and infections in mouse models of otitis media.


Entry requirements

Applicants are required to hold/or expect to obtain a UK Bachelor Degree 2:1 or better in a relevant subject. The University of Leicester English language requirements apply where applicable: https://le.ac.uk/study/research-degrees/entry-reqs/eng-lang-reqs

How to apply

Please apply via: https://www2.le.ac.uk/research-degrees/phd/genetics

Project / Funding Enquiries: Please contact Dr. Chris Bayliss, telephone 0116 2523465 or email , for further information.

References

1. Duell et al. FEBS Letters 2016 590 p3840-3853.
2. Moxon, Bayliss, Hood (2006) Ann Rev Genetics 40 p307-333

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