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- W95339848 abstract "Phenylethanolamine n-methyltransferase (Pnmt) catalyzes the conversion of norepinephrine into epinephrine, and thus serves as a marker of adrenergic cells. In adults, adrenergic cells are present in the adrenal medullae and the central and peripheral (sympathetic) nervous systems where they play key roles in stress responses and a variety of other functions. During early embryonic development, however, Pnmt first appears in the heart where it is associated with specialized myocytes in the pacemaking and conduction system. There is a transient surge in cardiac Pnmt expression beginning when the first myocardial contractions occur, before any nerve-like or neural crest cells appear in the heart. This early expression of Pnmt denotes a mesodermal origin of these Instrinsic Cardiac Adrenergic (ICA) cells. Interestingly, Pnmt+ cells are found in all four chambers of the developing heart, but by adult stages, are found primarily concentrated on the left side of the heart. This regionalized expression occurs in the left atrium and in specific regions of the left ventricle roughly corresponding to basal, mid, and apical sections. A second distinct population of Pnmt-expressing (Pnmt+) cells enters the embryonic heart from invading neural crest, and these Neural Crest-Derived (NCD) Pnmt+ cells appear to give rise to a subpopulation(s) of cardiac neurons. Pnmt expression thus serves as a marker not only for adrenergic cells, but also for precursor or primer cells destined to become specialized myocytes and neurons in the heart. This review discusses the distribution of Pnmt in the heart during development, including the types of cells where it is expressed, and their potential use for regenerative medicine therapies for cardiovascular disease." @default.
- W95339848 created "2016-06-24" @default.
- W95339848 creator A5004349466 @default.
- W95339848 creator A5007120969 @default.
- W95339848 creator A5012590888 @default.
- W95339848 date "2013-12-22" @default.
- W95339848 modified "2023-09-24" @default.
- W95339848 title "Therapeutic potential of Pnmt+ primer cells for neuro/myocardial regeneration." @default.
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