Influence of najanalgesin from Naja naja on GLT-1 in spinal cord of rat in neuropathic pain / 中国中药杂志
China Journal of Chinese Materia Medica
; (24): 903-907, 2011.
Article
in Zh
| WPRIM
| ID: wpr-252976
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the influence of najanalgesin on glutamate-glial transporter 1(GLT-1) in spinal cord of rats after L5 spinal nerve ligation and transection (SNL), and explore the spinal analgesic mechanism of najanalgesin.</p><p><b>METHOD</b>One hundred male SD rats were randomly divided into 6 groups: sham(A), SNL(B), SNL + najanalgesin(C), SNL + saline (D), SNL + najanalgesin + liposome (E), SNL + najanalgesin + liposome + GLT-1 As-ODNs(F) and treated with intrathecal injections of 10 p.L saline (A and D), 40 ng X kg(-1) najanalgesin (C, E and F), qd, respectively. Besides intrathecal administration of najanalgesin the rats were intrathecally injected with 10 microL of GLT-1 antisense oligodeoxynucleotides (As-ODNs) (F) and 10 micdroL of liposome(E) once daily on day 3. The L4-L6 segments of the spinal cord were isolated in 1, 4 and 7 d(A,B,C and D), 7 d(E and F) after surgery. The mRNA and protein of GLT-1 were determined.</p><p><b>RESULT</b>The SNL model has successfully been set up. Compared to sham group, the expression of GLT-1 mRNA and protein level in group B and D both increased firstly and decreased later, the expression of GLT-1 in group C was significantly increased and kept stable, which were also higher when compared to group D in day 7th. Compared to SNL + najanalgesin group, after intrathecal injection of GLT-1 As-ODNs the GLT-1, expression of GLT-1 in F group significantly decreased. While intrathecal administration of liposome had no significant effect on the spinal GLT-1 expression.</p><p><b>CONCLUSION</b>Najanalgesin could increase the mRNA and protein expression of GLT-1 in spinal cord, which may be one of its spinal mechanisms of analgesia.</p>
Full text:
1
Index:
WPRIM
Main subject:
Pharmacology
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Spinal Cord
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RNA, Messenger
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Gene Expression Regulation
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Rats, Sprague-Dawley
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Elapidae
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Excitatory Amino Acid Transporter 2
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Elapid Venoms
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Genetics
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Metabolism
Limits:
Animals
Language:
Zh
Journal:
China Journal of Chinese Materia Medica
Year:
2011
Type:
Article