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Characterizing the Inhibition of Neutrophil Extracellular Traps by Candida albicans Biofilms- [electronic resource]
Characterizing the Inhibition of Neutrophil Extracellular Traps by Candida albicans Biofilms- [electronic resource]
상세정보
- 자료유형
- 학위논문파일 국외
- 최종처리일시
- 20240214095833
- ISBN
- 9798380583664
- DDC
- 616.079
- 저자명
- Kernien, John F.
- 서명/저자
- Characterizing the Inhibition of Neutrophil Extracellular Traps by Candida albicans Biofilms - [electronic resource]
- 발행사항
- [S.l.]: : The University of Wisconsin - Madison., 2020
- 발행사항
- Ann Arbor : : ProQuest Dissertations & Theses,, 2020
- 형태사항
- 1 online resource(143 p.)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
- 주기사항
- Advisor: Nett, Jeniel.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2020.
- 사용제한주기
- This item must not be sold to any third party vendors.
- 초록/해제
- 요약Candida albicans is a frequent hospital-acquired fungal pathogen and cause of invasive candidiasis. When grown on surfaces like implanted medical devices as a biofilm, Candida is surrounded by a protective extracellular matrix, and resistant to host defenses and antifungal drugs. Neutrophils are the primary responder to fungal infections, including candidiasis. One host defense resisted by Candida biofilms are neutrophil extracellular traps (NETs). NETs consist of web-like nuclear DNA with antimicrobial proteins released to stimuli like large or aggregated pathogens. NET release entraps these pathogens, which are then killed and prevented from disseminating. The elongated hyphae and aggregated nature of C. albicans biofilm suggests NET release would be an effective way to combat this infection. However, previous work demonstrated that C. albicans biofilm inhibits NET release. Here, we examine components of C. albicans biofilm and neutrophils to determine their role in this inhibition of NET release. First, we determined that fungal morphology for biofilm formation does not play a role in inhibiting NET release to C. albicans biofilms. We grew C. albicans biofilms of clinical strains with vastly different filamentation, determining that despite differing morphologies and thickness, biofilms uniformly inhibited NET release. Next, we examined NET release phenotypes of neutrophils from patients with invasive candidiasis to confirm the clinical relevance of NET inhibition by C. albicans biofilm. We found that despite increased baseline and PMA-induced NET release relative to healthy neutrophils, these patient neutrophils released a similar amount of NETs to planktonic C. albicans, and that C. albicans biofilm still inhibited NET release. Finally, we looked at the role of prostaglandin E2 (PGE2) in inhibiting NET release to C. albicans biofilm, as it inhibits NET release to other stimuli. We found that PGE2 is highly present on the biofilm surface, and that PGE2 inhibitory receptor EP4 plays a role in the inhibition of NET release by C. albicans biofilm. Together, we demonstrate resilience of this inhibition to NET release by biofilms across a variety of morphologies, show the relevance of this phenotype for patients with invasive candidiasis, and illustrate the role of PGE2 as a component of this persistent inhibition.
- 일반주제명
- Pathology.
- 일반주제명
- Immunology.
- 일반주제명
- Cellular biology.
- 일반주제명
- Molecular biology.
- 키워드
- Albicans
- 키워드
- Biofilms
- 키워드
- Candida
- 키워드
- Neutrophils
- 기타저자
- The University of Wisconsin - Madison Cellular & Molecular Pathology
- 기본자료저록
- Dissertations Abstracts International. 85-04B.
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520240214095833
■006m o d
■007cr#unu||||||||
■020 ▼a9798380583664
■035 ▼a(MiAaPQ)AAI28092292
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616.079
■1001 ▼aKernien, John F.
■24510▼aCharacterizing the Inhibition of Neutrophil Extracellular Traps by Candida albicans Biofilms▼h[electronic resource]
■260 ▼a[S.l.]:▼bThe University of Wisconsin - Madison. ▼c2020
■260 1▼aAnn Arbor :▼bProQuest Dissertations & Theses, ▼c2020
■300 ▼a1 online resource(143 p.)
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-04, Section: B.
■500 ▼aAdvisor: Nett, Jeniel.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2020.
■506 ▼aThis item must not be sold to any third party vendors.
■520 ▼aCandida albicans is a frequent hospital-acquired fungal pathogen and cause of invasive candidiasis. When grown on surfaces like implanted medical devices as a biofilm, Candida is surrounded by a protective extracellular matrix, and resistant to host defenses and antifungal drugs. Neutrophils are the primary responder to fungal infections, including candidiasis. One host defense resisted by Candida biofilms are neutrophil extracellular traps (NETs). NETs consist of web-like nuclear DNA with antimicrobial proteins released to stimuli like large or aggregated pathogens. NET release entraps these pathogens, which are then killed and prevented from disseminating. The elongated hyphae and aggregated nature of C. albicans biofilm suggests NET release would be an effective way to combat this infection. However, previous work demonstrated that C. albicans biofilm inhibits NET release. Here, we examine components of C. albicans biofilm and neutrophils to determine their role in this inhibition of NET release. First, we determined that fungal morphology for biofilm formation does not play a role in inhibiting NET release to C. albicans biofilms. We grew C. albicans biofilms of clinical strains with vastly different filamentation, determining that despite differing morphologies and thickness, biofilms uniformly inhibited NET release. Next, we examined NET release phenotypes of neutrophils from patients with invasive candidiasis to confirm the clinical relevance of NET inhibition by C. albicans biofilm. We found that despite increased baseline and PMA-induced NET release relative to healthy neutrophils, these patient neutrophils released a similar amount of NETs to planktonic C. albicans, and that C. albicans biofilm still inhibited NET release. Finally, we looked at the role of prostaglandin E2 (PGE2) in inhibiting NET release to C. albicans biofilm, as it inhibits NET release to other stimuli. We found that PGE2 is highly present on the biofilm surface, and that PGE2 inhibitory receptor EP4 plays a role in the inhibition of NET release by C. albicans biofilm. Together, we demonstrate resilience of this inhibition to NET release by biofilms across a variety of morphologies, show the relevance of this phenotype for patients with invasive candidiasis, and illustrate the role of PGE2 as a component of this persistent inhibition.
■590 ▼aSchool code: 0262.
■650 4▼aPathology.
■650 4▼aImmunology.
■650 4▼aCellular biology.
■650 4▼aMolecular biology.
■653 ▼aAlbicans
■653 ▼aBiofilms
■653 ▼aCandida
■653 ▼aNeutrophils
■653 ▼aNeutrophil extracellular traps
■690 ▼a0571
■690 ▼a0982
■690 ▼a0379
■690 ▼a0307
■71020▼aThe University of Wisconsin - Madison▼bCellular & Molecular Pathology.
■7730 ▼tDissertations Abstracts International▼g85-04B.
■773 ▼tDissertation Abstract International
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2020
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16930915▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a202402▼f2024


