No evidence of UV cone input to mono- and biphasic horizontal cells in the goldfish retina

Autor(es)

Joselevitch, Christina ^[1] ; de Souza, John Manuel ^[1] ; Ventura, Dora Fix ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Psicol Expt, Inst Psicol, BR-05508030 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF COMPARATIVE PHYSIOLOGY A-NEUROETHOLOGY SENSORY NEURAL AND BEHAVI; v. 196, n. 12, p. 913-925, DEC 2010.
• Citações Web of Science: 0

Resumo

Many animal species make use of ultraviolet (UV) light in a number of behaviors, such as feeding and mating. The goldfish (Carassius auratus) is among those with a UV photoreceptor and pronounced UV sensitivity. Little is known, however, about the retinal processing of this input. We addressed this issue by recording intracellularly from second-order neurons in the adult goldfish retina. In order to test whether cone-driven horizontal cells (HCs) receive UV cone inputs, we performed chromatic adaptation experiments with mono- and biphasic HCs. We found no functional evidence of a projection from the UV-sensitive cones to these neurons in adult animals. This suggests that goldfish UV receptors may contact preferentially triphasic HCs, which is at odds with the hypothesis that all cones contact all cone-driven HC types. However, we did find evidence of direct M-cone input to monophasic HCs, favoring the idea that cone-HC contacts are more promiscuous than originally proposed. Together, our results suggest that either UV cones have a more restricted set of post-synaptic partners than the other three cone types, or that the UV input to mono- and biphasic HCs is not very pronounced in adult animals. (AU)

• Processo FAPESP: 96/12645-9 - Visão ultravioleta no Carassius auratus (Ostaryophisi, Cypriniformes, Cyprinidae): estudo eletrofisiológico do sistema cones-células horizontais
• Beneficiário: Christina Joselevitch
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 07/54136-0 - Processamento cromático em Carassius auratus (Ostariophysi, Cyprinidae): estudo da transmissão sináptica entre cones UV e células horizontais
• Beneficiário: Christina Joselevitch
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado