지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 329 - 338 (10page)
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초록· 키워드
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Dopaminergic amacrine cells (DACs) are among the most well-characterized neurons in the mammalian retina, and their connections to AII amacrine cells have been described in detail. However, the stratification of DAC dendrites differs based on their location in the inner plexiform layer (IPL), raising the question of whether all AII lobules are modulated by dopamine release from DACs. The present study aimed to clarify the relationship between DACs and AII amacrine cells, and to further elucidate the role of dopamine at synapses with AII amacrine cell. In the rabbit retina, DAC dendrites were observed in strata 1, 3, and 5 of the IPL. In stratum 1, most DAC dendritic varicosities—the presumed sites of neurotransmitter release—made contact with the somata and lobular appendages of AII amacrine cells. However, most lobular appendages of AII amacrine cells localized within stratum 2 of the IPL exhibited little contact with DAC varicosities. In addition, double- or triple-labeling experiments revealed that DACs did not express the GABAergic neuronal markers anti-GABA, vesicular GABA transporter, or glutamic acid decarboxylase. These findings suggest that the lobular appendages of AII amacrine cells are involved in at least two different circuits. We speculate that the circuit associated with stratum 1 of the IPL is modulated by DACs, while that associated with stratum 2 is modulated by unknown amacrine cells expressing a different neuroactive substance. Our findings further indicate that DACs in the rabbit retina do not use GABA as a neurotransmitter, in contrast to those in other mammals.
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등록된 정보가 없습니다.
참고문헌 (46)
참고문헌 신청
Kamp C / 1985 / Retinal transmitters and modulators: models for the brain / CRC Press :1~32
Versaux-Botteri C / 1986 / An improved method for tyrosine hydroxylase immunolabeling of catecholamine cells in whole mounted rat retina / J Histochem Cytochem 34:743~747
Tauchi M / 1990 / Shapes and distributions of the catecholamine-accumulating neurons in the rabbit retina / J Comp Neurol 293:178~189
Nguyen-Legros J / 1988 / Functional neuroarchitecture of the retina: hypothesis on the dysfunction of retinal dopaminergic circuitry in Parkinson’s disease / Surg Radiol Anat 10:137~144
Hokoc JN / 1987 / Tyrosine hydroxylase immunoreactivity in the rhesus monkey retina reveals synapses from bipolar cells to dopaminergic amacrine cells / J Neurosci 7:2785~2793
Versaux-Botteri C / 1986 / An improved method for tyrosine hydroxylase immunolabeling of catecholamine cells in whole mounted rat retina / J Histochem Cytochem 34:743~747
Tauchi M / 1990 / Shapes and distributions of the catecholamine-accumulating neurons in the rabbit retina / J Comp Neurol 293:178~189
Nguyen-Legros J / 1988 / Functional neuroarchitecture of the retina: hypothesis on the dysfunction of retinal dopaminergic circuitry in Parkinson’s disease / Surg Radiol Anat 10:137~144
Hokoc JN / 1987 / Tyrosine hydroxylase immunoreactivity in the rhesus monkey retina reveals synapses from bipolar cells to dopaminergic amacrine cells / J Neurosci 7:2785~2793
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