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논문 기본 정보

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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제55권 제6호
발행연도
2014.1
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1,600 - 1,605 (6page)

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Purpose: Transient receptor potential vanilloid 1 (TRPV1) is a ligand-gated nonselectivecation channel, which can be activated by capsaicin and other noxious stimuli. Recently, an association between bone pain and TRPV1 has been reported. However, the influence of osteoporosis on TRPV1 in the sensory system innervatingthe femur has not been reported. Materials and Methods: TRPV1-immunoreactive(ir) in dorsal root ganglia (DRG) neurons labeled with neurotracer [Fluoro-Gold (FG)] innervating the femurs of Sprague Dawley rats were examined in control, sham, and ovariectomized (OVX) rats. We evaluated osteoporosis in the femursand compared the proportion of TRPV1-ir DRG neurons innervating femur between the 3 groups of rats. Results: OVX rats showed osteoporotic cancellous bone in the femur. FG labeled neurons were distributed from L1 to L6 DRG, but there was no significant difference in the proportion of labeled neurons between the 3 groups (p>0.05). The proportions of FG labeled TRPV1-ir DRG neurons were 1.7%, 1.7%, and 2.8% of DRG neurons innervating the femur, in control, sham-operated,and OVX rats, respectively. The proportion of TRPV1-ir neurons in DRG innervating the femur in OVX rats was significantly higher than that in control and sham-operated rats (p<0.05). Conclusion: Under physiological conditions, DRG neurons innervating femurs in rats contain TRPV1. Osteoporosis increases the numbers of TRPV1-ir neurons in DRG innervating osteoporotic femurs in rats. These findings suggest that TRPV1 may have a role in sensory perception of osteoporoticfemurs.
#Osteoporosis #pain #transient receptor potential vanilloid 1 #femur

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참고문헌 (1)

참고문헌 신청
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