Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections

Bacterial keratitis is the most important leading cause of corneal opacification and blindness around the world. Mycobacterial keratitis is very hard to eradicate while Pseudomonas keratitis is very common and prone to drug resistance problems. In this study, we investigated the Pseudomonas keratiti...

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Main Author: Aung, Thet Tun
Other Authors: Yang Liang
Format: Theses and Dissertations
Language:English
Published: 2017
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Online Access:http://hdl.handle.net/10356/72273
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-722732023-02-28T18:45:59Z Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections Aung, Thet Tun Yang Liang School of Biological Sciences DRNTU::Science::Biological sciences Bacterial keratitis is the most important leading cause of corneal opacification and blindness around the world. Mycobacterial keratitis is very hard to eradicate while Pseudomonas keratitis is very common and prone to drug resistance problems. In this study, we investigated the Pseudomonas keratitis as a biofilm mode of infection that induces cyclic-di-GMP signaling and forms phagocyte-tolerant microcolonies on mouse cornea. The increased c-di-GMP content in P. aeruginosa was responsible for decreased levels in cytokine production. C-di-GMP reducing agent (Sodium Nitroprusside) was shown to enhance the efficacy of Colisitin treatment in Pseudomonas keratitis. Mycobacteria readily formed biofilms on mouse cornea comprising of large amounts of extracellular DNA. A strong synergism between Amikacin and Fluoroquinolones against Mycobacterium fortuitum has been observed. DNase addition further enhanced the efficacy of anti-mycobacterial drugs by breaking the mycobacterial biofilm matrix. New treatment strategy (combination of Amikacin, Fluoroquinolones and DNase) showed the best efficacy for converting mycobacterial infections. ​Doctor of Philosophy (SBS) 2017-05-31T07:01:19Z 2017-05-31T07:01:19Z 2017 Thesis Aung, T. T. (2017). Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections. Doctoral thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/72273 10.32657/10356/72273 en 265 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Biological sciences
spellingShingle DRNTU::Science::Biological sciences
Aung, Thet Tun
Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections
description Bacterial keratitis is the most important leading cause of corneal opacification and blindness around the world. Mycobacterial keratitis is very hard to eradicate while Pseudomonas keratitis is very common and prone to drug resistance problems. In this study, we investigated the Pseudomonas keratitis as a biofilm mode of infection that induces cyclic-di-GMP signaling and forms phagocyte-tolerant microcolonies on mouse cornea. The increased c-di-GMP content in P. aeruginosa was responsible for decreased levels in cytokine production. C-di-GMP reducing agent (Sodium Nitroprusside) was shown to enhance the efficacy of Colisitin treatment in Pseudomonas keratitis. Mycobacteria readily formed biofilms on mouse cornea comprising of large amounts of extracellular DNA. A strong synergism between Amikacin and Fluoroquinolones against Mycobacterium fortuitum has been observed. DNase addition further enhanced the efficacy of anti-mycobacterial drugs by breaking the mycobacterial biofilm matrix. New treatment strategy (combination of Amikacin, Fluoroquinolones and DNase) showed the best efficacy for converting mycobacterial infections.
author2 Yang Liang
author_facet Yang Liang
Aung, Thet Tun
format Theses and Dissertations
author Aung, Thet Tun
author_sort Aung, Thet Tun
title Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections
title_short Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections
title_full Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections
title_fullStr Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections
title_full_unstemmed Role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections
title_sort role of biofilm formation, its triggered immune responses and potential new treatments for bacterial eye infections
publishDate 2017
url http://hdl.handle.net/10356/72273
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