Male rat hypothalamic extraretinal photoreceptor Opsin3 is sensitive to osmotic stimuli and light

Barez-Lopez, Soledad; Bishop, Paul; Searby, Daniel; Murphy, David; Greenwood, Michael P.

Abstract

The light-sensitive protein Opsin 3 (Opn3) is present throughout the mammalian brain; however, the role of Opn3 in this organ remains unknown. Since Opn3 encoded mRNA is modulated in the supraoptic and paraventricular nucleus of the hypothalamus in response to osmotic stimuli, we have explored by in situ hybridization the expression of Opn3 in these nuclei. We have demonstrated that Opn3 is present in the male rat magnocellular neurones expressing either the arginine vasopressin or oxytocin neuropeptides and that Opn3 increases in both neuronal types in response to osmotic stimuli, suggesting that Opn3 functions in both cell types and that it might be involved in regulating water balance. Using rat hypothalamic organotypic cultures, we have demonstrated that the hypothalamus is sensitive to light and that the observed light sensitivity is mediated, at least in part, by Opn3. The data suggests that hypothalamic Opn3 can mediate a light-sensitive role to regulate circadian homeostatic processes.

Más información

Título según WOS: ID WOS:001138214700001 Not found in local WOS DB
Título de la Revista: JOURNAL OF NEUROENDOCRINOLOGY
Volumen: 36
Número: 2
Editorial: Wiley
Fecha de publicación: 2024
DOI:

10.1111/jne.13363

Notas: ISI