The Regulation of Phoenixin: A Fascinating Multidimensional Peptide

Author:

McIlwraith Emma K1,Zhang Ningtong1ORCID,Belsham Denise D123ORCID

Affiliation:

1. Department of Physiology, University of Toronto, ON, Canada

2. Department of Medicine, University of Toronto, ON, Canada

3. Department of Obstetrics and Gynaecology, University of Toronto, ON, Canada

Abstract

Abstract The phoenixin (PNX) peptide is linked to the control of reproduction, food intake, stress, and inflammation. However, little is known about what regulates its gene and protein expression, information that is critical to understand the physiological role of PNX. In this review, we summarize what is known about the transcriptional control of Pnx and its receptor Gpr173. A main function of PNX is as a positive regulator of the hypothalamic-pituitary-gonadal axis, but there is a lack of research on its control by reproductive hormones and peptides. PNX is also associated with food intake, and its expression is linked to feeding status, fatty acids, and glucose. It is influenced by environmental and hormonal-induced stress. The regulation of Pnx in most contexts remains an enigma, in part due to conflicting and negative results. An extensive analysis of the response of the Pnx gene to factors related to reproduction, metabolism, stress, and inflammation is required. Analysis of the Pnx promoter and epigenetic regulation must be considered to understand how this level of control contributes to its pleiotropic effects. PNX is now linked to a broad range of functions, but more research on its gene regulation is required to understand its place in overall physiology and therapeutic potential.

Publisher

The Endocrine Society

Subject

Endocrinology, Diabetes and Metabolism

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