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Retinal Encoding Is Shaped by GABAA Presynaptic Inhibition
Retinal Encoding Is Shaped by GABAA Presynaptic Inhibition
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104703
- ISBN
- 9798280770850
- DDC
- 616
- 저자명
- Nagy, Jenna.
- 서명/저자
- Retinal Encoding Is Shaped by GABAA Presynaptic Inhibition
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 95 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Sinha, Raunak.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
- 초록/해제
- 요약Inhibition regulates the output of neural circuits by modulating neuronal function at both the pre- and postsynapse. In the retina, presynaptic inhibition regulates neurotransmitter release from the axon terminals of second-order neurons, bipolar cells (BCs), and modifies feedforward signaling from BCs to retinal output neurons, ganglion cells (GCs). We know a great deal about the localization and molecular composition of GABA and Glycine receptors that mediate presynaptic inhibition at BC terminals. However, a lack of BC subtype specific perturbations has limited our understanding of how presynaptic inhibition shapes functional output across distinct retinal pathways. Here, we use a transgenic approach which eliminates axonal GABAA receptors from select BC types in mouse retina, resulting in enhanced sensitivity and slower kinetics of light-evoked GC responses. We test the effects of selective loss of GABAA presynaptic inhibition on GC adaptive processes underlying naturalistic visual processing in the behaviorally relevant ONα GC retinal circuit. We find that GABAA presynaptic inhibition shapes retinal circuit encoding of natural scenes by regulating adaptation to both luminance and contrast through mechanisms which alter the degree and speed the rate of gain depression in response to dynamic stimuli. We also find that presynaptic inhibition plays a major role in noise reduction across a wide range of background luminance. Finally, we provide evidence that GABAA presynaptic inhibition mediates these effects through regulation of BC short-term synaptic plasticity and tonic circuit activity.
- 일반주제명
- Neurosciences
- 일반주제명
- Ophthalmology
- 일반주제명
- Cellular biology
- 일반주제명
- Pathology
- 일반주제명
- Molecular biology
- 키워드
- GABAA receptors
- 키워드
- Mouse retina
- 기타저자
- The University of Wisconsin - Madison Neuroscience
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798280770850
■035 ▼a(MiAaPQ)AAI32116415
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616
■1001 ▼aNagy, Jenna.
■24510▼aRetinal Encoding Is Shaped by GABAA Presynaptic Inhibition
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a95 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Sinha, Raunak.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
■520 ▼aInhibition regulates the output of neural circuits by modulating neuronal function at both the pre- and postsynapse. In the retina, presynaptic inhibition regulates neurotransmitter release from the axon terminals of second-order neurons, bipolar cells (BCs), and modifies feedforward signaling from BCs to retinal output neurons, ganglion cells (GCs). We know a great deal about the localization and molecular composition of GABA and Glycine receptors that mediate presynaptic inhibition at BC terminals. However, a lack of BC subtype specific perturbations has limited our understanding of how presynaptic inhibition shapes functional output across distinct retinal pathways. Here, we use a transgenic approach which eliminates axonal GABAA receptors from select BC types in mouse retina, resulting in enhanced sensitivity and slower kinetics of light-evoked GC responses. We test the effects of selective loss of GABAA presynaptic inhibition on GC adaptive processes underlying naturalistic visual processing in the behaviorally relevant ONα GC retinal circuit. We find that GABAA presynaptic inhibition shapes retinal circuit encoding of natural scenes by regulating adaptation to both luminance and contrast through mechanisms which alter the degree and speed the rate of gain depression in response to dynamic stimuli. We also find that presynaptic inhibition plays a major role in noise reduction across a wide range of background luminance. Finally, we provide evidence that GABAA presynaptic inhibition mediates these effects through regulation of BC short-term synaptic plasticity and tonic circuit activity.
■590 ▼aSchool code: 0262.
■650 4▼aNeurosciences
■650 4▼aOphthalmology
■650 4▼aCellular biology
■650 4▼aPathology
■650 4▼aMolecular biology
■653 ▼aGABAA receptors
■653 ▼aMouse retina
■653 ▼aPresynaptic inhibition
■653 ▼aRetinal ganglion cell
■690 ▼a0317
■690 ▼a0379
■690 ▼a0381
■690 ▼a0307
■690 ▼a0571
■71020▼aThe University of Wisconsin - Madison▼bNeuroscience.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358440▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


