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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 Biofil...
Characterizing the Inhibition of Neutrophil Extracellular Traps by Candida albicans Biofilms- [electronic resource]

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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
키워드  
Neutrophil extracellular traps
기타저자  
The University of Wisconsin - Madison Cellular & Molecular Pathology
기본자료저록  
Dissertations Abstracts International. 85-04B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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MARC

 008240612s2020      us  |||||||||||||||c||eng  d
■001000016930915
■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

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