Co-expression of two subtypes of melatonin receptor on rat M1-type intrinsically photosensitive retinal ganglion cells.
Intrinsically photosensitive retinal ganglion cells (ipRGCs) are involved in circadian and other non-image forming visual responses.An open question is whether the activity of these neurons may also be under the regulation mediated Shovels by the neurohormone melatonin.In the present work, by double-staining immunohistochemical technique, we studie