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Title: Expression of μ-Opioid receptors in developing rat spinal cord: An autoradiographic study
Authors: Ray, Subrata Basu
Wadhwa, Shashi
Keywords: Ontogeny;μ-receptor;Spinal cord;[3H]DAMGO
Issue Date: May-2004
Publisher: NISCAIR-CSIR, India
Abstract: The expression of μ-opioid receptors in the developing rat spinal cord (Postnatal days 7, 14, 30) was studied by autoradiography using [3H]DAMGO. When compared to camera lucida drawings, the receptor was noted over the entire gray matter and dorsal root ganglia at postnatal days 7 and 14. At postnatal day 30, the receptor expression decreased over the gray matter except the superficial laminae (laminae I and II). At all age groups studied, a higher expression of the receptor was noted over the superficial laminae. The study shows that μ-opioid receptors appears early in postnatal development and attains mature receptor distribution relatively late in ontogeny, suggesting a possible role in the normal development of nervous system. This is affirmed by an impairment of psychomotor development in babies born to mothers, addicted to opiates.
Page(s): 533-537
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.42(05) [May 2004]

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