Thyrotropin-releasing hormone (TRH)-like material was found in human retina obtained at autopsy from eyes used for corneal grafts. The TRH-like material was extracted with methanol and was found to be indistinguishable from synthetic TRH in its immunoreactivity and bioreactivity and in its proteolytic degradation by fresh human serum. The TRH concentration in human retina was similar to that reported in human cerebral cortex. These data are in keeping with the notion that the retina is an extension of the central nervous system. The physiological function of human retinal TRH in unknown: probably it acts as a neurotransmitter.
The thyrotropin-releasing hormone (TRH) has been found in porcine and in bovine retina, and it is indistinguishable from synthetic TRH in its immunological and biological properties. The role of retinal TRH is unknown, it probably acts as a neutrotransmitter.
Measurements of serum thyroxine binding globulin (TBG) by a ligand partitioning sandwich assay were performed in 173 healthy subjects between three months and 92 yr of age. Significant sex-related differences were observed in subjects aged 21 to 50 yr. In males, serum TBG declined progressively reaching a nadir in the fourth decade and then increased with advancing age. In contrast, no significant age-related variation was observed in females.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.