Immunochemical localization of the metabotropic glutamate receptors in the rat heart

The localization of the glutamate receptor outside of the central nervous system is becoming more evident. These receptors have been implicated in brain function and pathology. It can also be envisioned that they play a vital role in the physiology of other organs and systems. We recently reported t...

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Bibliographic Details
Published in:Brain research bulletin 1999-01, Vol.48 (2), p.143-146
Main Authors: Gill, Santokh S, Pulido, Olga M, Mueller, Reudi W, McGuire, Peter F
Format: Article
Language:English
Subjects:
Animals
Antibody Specificity
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Heart
Heart - anatomy & histology
Immunohistochemistry
Male
mGluR 1α
mGluR 2/3
mGluR 5
Myocardium - metabolism
Preferential localization
Rat heart
Rats
Rats, Sprague-Dawley
Receptors, Metabotropic Glutamate - metabolism
Vertebrates: cardiovascular system
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Summary:The localization of the glutamate receptor outside of the central nervous system is becoming more evident. These receptors have been implicated in brain function and pathology. It can also be envisioned that they play a vital role in the physiology of other organs and systems. We recently reported the presence of ionotropic glutamate receptors in the rat heart. These were distributed differentially in specific cardiac structures, including nerve terminals, ganglion cells, and the conducting system. In this study, we investigated the presence and localization of the metabotropic glutamate receptors (mGluRs) in the rat heart by immunohistochemistry. The experimental data show that the mGluR 1α, mGLuR 2/3, and mGluR 5 are present in the rat heart. Their preferential localization includes nerve terminals, ganglion cells, and elements of the conducting system. The mGluR 5 was the only receptor located in the intercalated disks of the cardiac muscle and in the endothelial lining of the blood vessels. This preferential localization to the different components of the conducting system and cardiac neural structures suggest that they play a role in the physiology of the heart.
ISSN:0361-9230
1873-2747
DOI:10.1016/S0361-9230(98)00154-3