Abstract
Pituitary adenylate cyclase-activating polypeptide (PACAP) is a 27- or 38-amino acid neuropeptide, which belongs to the vasoactive intestinal polypeptide/glucagon/secretin family of peptides. PACAP and its three receptor subtypes are expressed in neural tissues and in the eye, including the retina, cornea, and lacrimal gland. PACAP is known to exert pleiotropic effects on the central nervous system and in eye tissues where it plays important roles in protecting against dry eye. This review provides an overview of current knowledge regarding dry eye symptoms in aged animals and humans and the protective effects, mechanisms of action. In addition, we also refer to the development of a new preventive/therapeutic method by PACAP of dry eye patients.
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Acknowledgments
We are indebted to co-researchers for assistance, especially to Drs. Dora Reglodi of Pecs University, Hitoshi Hashimoto of Osaka University, Rakwal Randeep of Tsukuba University and Ms. Junko Shibato of Hoshi University for the research described in this review paper.
Funding
This work was supported by the JSPS KAKENHI grant numbers 2459280, 2459268, 23249079, 15K15670, 16H02684, and 15H01288.
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Shioda, S., Takenoya, F., Hirabayashi, T. et al. Effects of PACAP on Dry Eye Symptoms, and Possible Use for Therapeutic Application. J Mol Neurosci 68, 420–426 (2019). https://doi.org/10.1007/s12031-018-1087-1
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DOI: https://doi.org/10.1007/s12031-018-1087-1