Abstract
Widely spread axon terminals of TIP39 neurons have a distribution similar to PTH2R containing neurons and their fibers which provides an anatomic base of neuromodulation action of TIP39. This functional and anatomic link- ing lets state that TIP39 and PTH2R form a neuromodulator ligand-receptor system. Basing on mechanisms of signal transmission used by TIP39 and PTH2R, they can form a neuromodulator system in many brain parts. TIP39-PTH2R system is a unique neuropeptide-receptor system, which localization and functions in the central nervous system differ from any other neuropeptides. Neuromodulator system TIP39-PTH2R predominantly participates in neuroendocrinal modulation by affecting the endocrinal system by means of its presence in several areas of hypothalamus. TIP39 influences neurons that contain somatostatin and corticotropin-releasing hormone. TIP39 can affect the release of adrenocorticotropin, luteinizing hormone, growth hormone and arginine-vasopressin from hypophysis. Experimental data prove that TIP39 modulates regulatory network of anxiety and depression, several aspects of stress reaction and also controls body temperature, participates in processing of auditory and nociceptive information. Physiological role of TIP39-PTH2R system is still to some extent unknown. However, distribution of PTH2R and TIP39 in tissues outside central nervous system assumes other potential physiological effects for this signal way. It is assumed that TIP39- PTH2R system should be probably considered as a potential therapeutic target for treatment of anxiety, depression and chronic pain, control and correction of neuroendocrine disruptions.
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