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NMDA Receptor Ablation Alters Synaptic Function and Connectivity at Mouse Medial Prefrontal Cortex Synapses
NMDA Receptor Ablation Alters Synaptic Function and Connectivity at Mouse Medial Prefrontal Cortex Synapses
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105133
- ISBN
- 9798293866731
- DDC
- 616
- 서명/저자
- NMDA Receptor Ablation Alters Synaptic Function and Connectivity at Mouse Medial Prefrontal Cortex Synapses
- 발행사항
- [Sl] : University of Minnesota, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 135 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Rothwell, Patrick E.
- 학위논문주기
- Thesis (Ph.D.)--University of Minnesota, 2025.
- 초록/해제
- 요약The glutamate hypothesis of schizophrenia posits that patients' symptoms arise from abnormal corticolimbic glutamatergic signaling, which is supported by evidence of abnormal expression of N-methyl-D-aspartate receptors (NMDARs) and decreased dendritic spine density in the prefrontal cortex (PFC). Pharmacological blockade of NMDARs in humans and animal models induces psychotomimetic symptoms, cognitive deficits, and decreased neural synchrony, with genetic knockdown of NMDARs providing further evidence of altered spine density and synaptic transmission. However, it is unknown how chronic loss of NMDARs in the PFC during adolescence - a developmental period associated with significant synaptic pruning and symptom onset in patients - affects spine density and neurotransmission, and whether compensatory mechanisms emerge over time. In this study, we used in vivo genome editing to ablate expression of the Grin1 gene, which encodes the obligate GluN1 subunit of NMDARs, in neurons in the medial PFC of female and male adolescent mice. We assessed synaptic density and function in layer V pyramidal neurons at multiple time points using whole-cell patch-clamp electrophysiology, integrated with confocal imaging of dendritic spine architecture in recorded neurons. NMDAR ablation caused an early decrease in basilar dendritic spine density, followed by a rebound over baseline in spine density and a corresponding increase in AMPAR-mediated synaptic transmission. Inhibitory spontaneous neurotransmission was also increased, suggesting that synaptic compensation maintains an allostatic set point. Our findings demonstrate that NMDAR ablation initially disrupts local PFC networks, followed by recovery via compensatory processes that may be impaired in the disease state.
- 일반주제명
- Neurosciences
- 일반주제명
- Bioinformatics
- 일반주제명
- Genetics
- 키워드
- Genome editing
- 키워드
- Schizophrenia
- 기타저자
- University of Minnesota Neuroscience
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798293866731
■035 ▼a(MiAaPQ)AAI32239375
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616
■1001 ▼aDick, Rachel Miriam.
■24510▼aNMDA Receptor Ablation Alters Synaptic Function and Connectivity at Mouse Medial Prefrontal Cortex Synapses
■260 ▼a[Sl]▼bUniversity of Minnesota▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a135 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Rothwell, Patrick E.
■5021 ▼aThesis (Ph.D.)--University of Minnesota, 2025.
■520 ▼aThe glutamate hypothesis of schizophrenia posits that patients' symptoms arise from abnormal corticolimbic glutamatergic signaling, which is supported by evidence of abnormal expression of N-methyl-D-aspartate receptors (NMDARs) and decreased dendritic spine density in the prefrontal cortex (PFC). Pharmacological blockade of NMDARs in humans and animal models induces psychotomimetic symptoms, cognitive deficits, and decreased neural synchrony, with genetic knockdown of NMDARs providing further evidence of altered spine density and synaptic transmission. However, it is unknown how chronic loss of NMDARs in the PFC during adolescence - a developmental period associated with significant synaptic pruning and symptom onset in patients - affects spine density and neurotransmission, and whether compensatory mechanisms emerge over time. In this study, we used in vivo genome editing to ablate expression of the Grin1 gene, which encodes the obligate GluN1 subunit of NMDARs, in neurons in the medial PFC of female and male adolescent mice. We assessed synaptic density and function in layer V pyramidal neurons at multiple time points using whole-cell patch-clamp electrophysiology, integrated with confocal imaging of dendritic spine architecture in recorded neurons. NMDAR ablation caused an early decrease in basilar dendritic spine density, followed by a rebound over baseline in spine density and a corresponding increase in AMPAR-mediated synaptic transmission. Inhibitory spontaneous neurotransmission was also increased, suggesting that synaptic compensation maintains an allostatic set point. Our findings demonstrate that NMDAR ablation initially disrupts local PFC networks, followed by recovery via compensatory processes that may be impaired in the disease state.
■590 ▼aSchool code: 0130.
■650 4▼aNeurosciences
■650 4▼aBioinformatics
■650 4▼aGenetics
■653 ▼aComputational modeling
■653 ▼aGenome editing
■653 ▼aPrefrontal cortex
■653 ▼aSchizophrenia
■653 ▼aSynaptic physiology
■690 ▼a0317
■690 ▼a0369
■690 ▼a0715
■71020▼aUniversity of Minnesota▼bNeuroscience.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0130
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359528▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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