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Neuroimmune Regulation of Plasticity in the Maternal Brain and Response to Peripartum Perturbations
Neuroimmune Regulation of Plasticity in the Maternal Brain and Response to Peripartum Pert...
Neuroimmune Regulation of Plasticity in the Maternal Brain and Response to Peripartum Perturbations

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105206
ISBN  
9798290955070
DDC  
616
저자명  
Dye, Courtney N.
서명/저자  
Neuroimmune Regulation of Plasticity in the Maternal Brain and Response to Peripartum Perturbations
발행사항  
[Sl] : The Ohio State University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
269 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
주기사항  
Advisor: Lenz, Kathryn M.;Leuner, Benedetta.
학위논문주기  
Thesis (Ph.D.)--The Ohio State University, 2024.
초록/해제  
요약Pregnancy is a time of dramatic peripheral immune alterations to promote the development and later care for the offspring. However, these changes lend vulnerability to mental illness for some mothers, the most prominent being Postpartum Depression (PPD). In this dissertation, I aimed to investigate the role of the innate brain immune cell, microglia, in the maternal brain and its role in governing maternal mental health and behavior. Microglia decrease during late pregnancy, and these decreases persist postpartum. I first investigated whether microglia decreases are permissive for the onset and display of maternal care. Depleting microglia in a nulliparous maternal sensitization paradigm, I found that loss of microglia was sufficient for the display of caretaking behaviors. This was accompanied by changes in cellular activation across the maternal brain network.After establishing the functional importance of decreased microglia in facilitating maternal behavior, I investigated whether perturbations during pregnancy disrupted the maternal neuroimmune milieu. I also examined if neuroimmune changes were associated with impairments in care. I employed two different models of environmental perturbations I hypothesized would lead to neuroimmune alterations: gestational stress and chronic opioid exposure. Following exposure to chronic stress from gestational days (GD) 7-20, I examined microglia activity at GD21 and at postpartum day 8 (PD8). Immunolabeling of microglia and phagolysosomal marker CD68 increased in the postpartum medial prefrontal cortex (mPFC) in stressed mothers. A Nanostring nCounter panel revealed broad downregulation in stressed mothers of transcripts involved in immune activating and immune dampening effects, indicating dysregulated neuroimmune function at both GD21 and PD8 in the mPFC. Transcript alterations were also found for factors that control excitatory and inhibitory neuronal signaling, as well as components of the extracellular matrix (ECM). We did not see any changes in excitatory synaptic protein following additional immunolabeling at these time points. Next, we assessed the impact of gestational stress on perineuronal nets (PNNs), specialized ECM proteins. We found significant reductions in PNNs in the mPFC following gestational stress at both GD21 and PD8. We collected tissue at PD6 and found microglia phagocytosis of PNNs was increased in stressed mothers, likely contributing to the reductions in PNN number present at PD8. In a final study, I administered either oxycodone, buprenorphine, or a vehicle control before, during, and after pregnancy to model both illicit opioid use and medication assisted therapy during the peripartum period. Mothers treated with opioids displayed stark reductions in maternal behaviors across the postpartum period. I then examined relevant indicators of neuroinflammatory activity across the maternal brain network. The region where we saw the most pronounced changes was the periaqueductal grey. This included increased microglia staining in oxycodone mothers, and increased astrocyte staining in buprenorphine mothers compared to vehicle. We also found increases in IL1B, TNF, and TLR4 in oxycodone mothers in this region. Overall, this work demonstrates the importance of the central immune system in facilitating maternal care. Together these studies provide a necessary foundation for furthering investigation of microglia and the neuroimmune system in developing treatments to support maternal care.
일반주제명  
Neurosciences
일반주제명  
Immunology
일반주제명  
Mental health
일반주제명  
Obstetrics
키워드  
Maternal behavior
키워드  
Pregnancy
키워드  
Postpartum
키워드  
Microglia
키워드  
Neuroimmune alterations
키워드  
Stress
기타저자  
The Ohio State University Neuroscience Graduate Studies Program
기본자료저록  
Dissertations Abstracts International. 87-02B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aDye,  Courtney  N.
■24510▼aNeuroimmune  Regulation  of  Plasticity  in  the  Maternal  Brain  and  Response  to  Peripartum  Perturbations
■260    ▼a[Sl]▼bThe  Ohio  State  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
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■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-02,  Section:  B.
■500    ▼aAdvisor:  Lenz,  Kathryn  M.;Leuner,  Benedetta.
■5021  ▼aThesis  (Ph.D.)--The  Ohio  State  University,  2024.
■520    ▼aPregnancy  is  a  time  of  dramatic  peripheral  immune  alterations  to  promote  the  development  and  later  care  for  the  offspring.  However,  these  changes  lend  vulnerability  to  mental  illness  for  some  mothers,  the  most  prominent  being  Postpartum  Depression  (PPD).  In  this  dissertation,  I  aimed  to  investigate  the  role  of  the  innate  brain  immune  cell,  microglia,  in  the  maternal  brain  and  its  role  in  governing  maternal  mental  health  and  behavior.  Microglia  decrease  during  late  pregnancy,  and  these  decreases  persist  postpartum.  I  first  investigated  whether  microglia  decreases  are  permissive  for  the  onset  and  display  of  maternal  care.  Depleting  microglia  in  a  nulliparous  maternal  sensitization  paradigm,  I  found  that  loss  of  microglia  was  sufficient  for  the  display  of  caretaking  behaviors.  This  was  accompanied  by  changes  in  cellular  activation  across  the  maternal  brain  network.After  establishing  the  functional  importance  of  decreased  microglia  in  facilitating  maternal  behavior,  I  investigated  whether  perturbations  during  pregnancy  disrupted  the  maternal  neuroimmune  milieu.  I  also  examined  if  neuroimmune  changes  were  associated  with  impairments  in  care.  I  employed  two  different  models  of  environmental  perturbations  I  hypothesized  would  lead  to  neuroimmune  alterations:  gestational  stress  and  chronic  opioid  exposure.  Following  exposure  to  chronic  stress  from  gestational  days  (GD)  7-20,  I  examined  microglia  activity  at  GD21  and  at  postpartum  day  8  (PD8).  Immunolabeling  of  microglia  and  phagolysosomal  marker  CD68  increased  in  the  postpartum  medial  prefrontal  cortex  (mPFC)  in  stressed  mothers.  A  Nanostring  nCounter  panel  revealed  broad  downregulation  in  stressed  mothers  of  transcripts  involved  in  immune  activating  and  immune  dampening  effects,  indicating  dysregulated  neuroimmune  function  at  both  GD21  and  PD8  in  the  mPFC.  Transcript  alterations  were  also  found  for  factors  that  control  excitatory  and  inhibitory  neuronal  signaling,  as  well  as  components  of  the  extracellular  matrix  (ECM).  We  did  not  see  any  changes  in  excitatory  synaptic  protein  following  additional  immunolabeling  at  these  time  points.  Next,  we  assessed  the  impact  of  gestational  stress  on  perineuronal  nets  (PNNs),  specialized  ECM  proteins.  We  found  significant  reductions  in  PNNs  in  the  mPFC  following  gestational  stress  at  both  GD21  and  PD8.  We  collected  tissue  at  PD6  and  found  microglia  phagocytosis  of  PNNs  was  increased  in  stressed  mothers,  likely  contributing  to  the  reductions  in  PNN  number  present  at  PD8.  In  a  final  study,  I  administered  either  oxycodone,  buprenorphine,  or  a  vehicle  control  before,  during,  and  after  pregnancy  to  model  both  illicit  opioid  use  and  medication  assisted  therapy  during  the  peripartum  period.  Mothers  treated  with  opioids  displayed  stark  reductions  in  maternal  behaviors  across  the  postpartum  period.  I  then  examined  relevant  indicators  of  neuroinflammatory  activity  across  the  maternal  brain  network.  The  region  where  we  saw  the  most  pronounced  changes  was  the  periaqueductal  grey.  This  included  increased  microglia  staining  in  oxycodone  mothers,  and  increased  astrocyte  staining  in  buprenorphine  mothers  compared  to  vehicle.  We  also  found  increases  in  IL1B,  TNF,  and  TLR4  in  oxycodone  mothers  in  this  region.  Overall,  this  work  demonstrates  the  importance  of  the  central  immune  system  in  facilitating  maternal  care.  Together  these  studies  provide  a  necessary  foundation  for  furthering  investigation  of  microglia  and  the  neuroimmune  system  in  developing  treatments  to  support  maternal  care.
■590    ▼aSchool  code:  0168.
■650  4▼aNeurosciences
■650  4▼aImmunology
■650  4▼aMental  health
■650  4▼aObstetrics
■653    ▼aMaternal  behavior
■653    ▼aPregnancy
■653    ▼aPostpartum
■653    ▼aMicroglia
■653    ▼aNeuroimmune  alterations
■653    ▼aStress
■690    ▼a0317
■690    ▼a0982
■690    ▼a0347
■690    ▼a0380
■71020▼aThe  Ohio  State  University▼bNeuroscience  Graduate  Studies  Program.
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■792    ▼a2024
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■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359741▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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