THE EFFECT OF INTRACEREBROVENTRICULAR INJECTION OF CGRP ON PAIN BEHAVIORAL RESPONSES AND MONOAMINES CONCENTRATIONS IN THE PERIAQUEDUCTAL GRAY AREA IN RAT

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RAHIMI KAVEH; SAJEDIANFARD JAVAD; OWJI ALI AKBARE

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Journal Paper

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Journal: Iranian Journal of Basic Medical Sciences Year:2018 | Volume:21 | Issue:4 Page(s): 395-399

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Title

THE EFFECT OF INTRACEREBROVENTRICULAR INJECTION OF CGRP ON PAIN BEHAVIORAL RESPONSES AND MONOAMINES CONCENTRATIONS IN THE PERIAQUEDUCTAL GRAY AREA IN RAT

Author(s)

RAHIMI KAVEH | SAJEDIANFARD JAVAD | OWJI ALI AKBARE | Issue Writer Certificate

Keywords

CGRP

FORMALIN TEST

HPLC

MONOAMINES

MICRODIALYSIS

PERIAQUEDUCTAL GRAY AREA

Abstract

Objective (s): Calcitonin gene related peptide (CGRP) receptors are widely distributed in the central nervous system. The aim of this study was to investigate the effects of intracerebroventricular (ICV) injection of CGRP on pain behavioral responses and on levels of MONOAMINES in the PERIAQUEDUCTAL GRAY AREA (PAG) during the FORMALIN TEST in rats.Materials and Methods: Twenty-four male rats were studied in four groups (n=6). CGRP was injected into the left cerebral ventricle (1.5 nmol, 5 ml). After 20 min, formalin (2.5%) was subcutaneously injected into the right hind paw. Behavior nociceptive score was recorded up to 60 min. During the FORMALIN TEST, the PAG was subjected to MICRODIALYSIS and levels of norepinephrine, 3-methoxy-4- hydroxyphenyl-glycol (HMPG), dopamine, 3, 4-dihydroxyphenylacetic acid (DOPAC), serotonin and 5-hydroxyindole-acetic acid (HIAA) were measured by HPLC.Results: ICV injection of CGRP lead to a significant pain reduction in acute, middle and chronic phases of the FORMALIN TEST. Dialysate concentrations of norepinephrine, HMPG, dopamine, DOPAC, serotonin and HIAA in the PGA area showed an increase in acute phase, middle phase and beginning of the chronic phase of the FORMALIN TEST.Conclusion: CGRP significantly reduced pain by increased concentrations of MONOAMINES and their metabolites in dialysates from PAG when injected ICV to rats.

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APA: Copy

RAHIMI, KAVEH, SAJEDIANFARD, JAVAD, & OWJI, ALI AKBARE. (2018). THE EFFECT OF INTRACEREBROVENTRICULAR INJECTION OF CGRP ON PAIN BEHAVIORAL RESPONSES AND MONOAMINES CONCENTRATIONS IN THE PERIAQUEDUCTAL GRAY AREA IN RAT. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES, 21(4), 395-399. SID. https://sid.ir/paper/715421/en

Vancouver: Copy

RAHIMI KAVEH, SAJEDIANFARD JAVAD, OWJI ALI AKBARE. THE EFFECT OF INTRACEREBROVENTRICULAR INJECTION OF CGRP ON PAIN BEHAVIORAL RESPONSES AND MONOAMINES CONCENTRATIONS IN THE PERIAQUEDUCTAL GRAY AREA IN RAT. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES[Internet]. 2018;21(4):395-399. Available from: https://sid.ir/paper/715421/en

IEEE: Copy

KAVEH RAHIMI, JAVAD SAJEDIANFARD, and ALI AKBARE OWJI, “THE EFFECT OF INTRACEREBROVENTRICULAR INJECTION OF CGRP ON PAIN BEHAVIORAL RESPONSES AND MONOAMINES CONCENTRATIONS IN THE PERIAQUEDUCTAL GRAY AREA IN RAT,” IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES, vol. 21, no. 4, pp. 395–399, 2018, [Online]. Available: https://sid.ir/paper/715421/en

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