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1.
Chinese Medical Journal ; (24): 734-741, 2014.
Article in English | WPRIM | ID: wpr-253275

ABSTRACT

<p><b>BACKGROUND</b>The molecular and cellular origins of migraine headache are among the most complex problems in contemporary neurology. Up to now the pathogenesis of migraine still remains unclearly defined. The objective of this study was to explore new factors that may be related to the mechanism of migraine.</p><p><b>METHODS</b>The present study performed a comprehensive analysis of gene expression in the trigeminal nucleus caudalis induced by electrical stimulation of dura mater surrounding the superior sagittal sinus in conscious rats using microarray analysis followed by quantitative real-time reverse-transcribed polymerase chain reaction (qRT-PCR) verification. Student's two sample t-test was employed when two groups were compared. A P value <0.05 was considered to be statistically significant.</p><p><b>RESULTS</b>Comparing the placebo and the electrical stimulation groups, 40 genes were determined to be significantly differentially expressed. These significantly differentially expressed genes were involved in many pathways, including transporter activity, tryptophan metabolism, G protein signaling, kinase activity, actin binding, signal transducer activity, anion transport, protein folding, enzyme inhibitor activity, coenzyme metabolism, binding, ion transport, cell adhesion, metal ion transport, oxidoreductase activity, mitochondrion function, and others. Most of the genes were involved in more than 2 pathways. Of particular interest is the up-regulation of Phactr3 and Akap5 and the down-regulation of Kdr.</p><p><b>CONCLUSION</b>These findings may provide important clues for a better understanding of the molecular mechanism of migraine.</p>


Subject(s)
Animals , Dura Mater , Physiology , Electric Stimulation , Gene Expression , Physiology , Male , Microarray Analysis , Migraine Disorders , Genetics , Rats , Rats, Sprague-Dawley , Real-Time Polymerase Chain Reaction , Superior Sagittal Sinus , Physiology
2.
Article in Chinese | WPRIM | ID: wpr-452017

ABSTRACT

Objective To explore the effects of flunarizine hydrochloride on plasma calcitonin gene-related pep-tide and substance P levels after CSD in a rat migraine model of cortical spreading depression (CSD). Methods Thirty adult rats were randomly and evenly divided into three groups:control Group, CSD group and flunarizine group. The CSD waves were evoked by application of potassium chloride on brain surface with filter paper. Funarizine hydrochloride was intravenously administered to rats five minutes prior to application of potassium chloride. The plasma levels of CGRP and SP were measured by using radioimmunity assay. Statistical analyses were performed using two-sample t test and analy-sis of variance. Results CSD waves were absent in control group whereas CSD waves were induced in CSD and flunari-zine groups. The latency of the first CSD wave was longer in flunarizine group (167.90 ± 25.18 s) than in CSD group (130.90 ± 13.30 s) (P<0.01). The number of CSD waves was smaller in flunarizine group (4.50 ± 1.84) than in CSD group (8.50 ± 2.07) (P<0.01). The amplitude of CSD waves was lower in flunarizine group (11.40 ± 4.12 mv) than in CSD group (24.40±3.57 mv) (P<0.01). The levels of CGRP and SP in both CSD group (CGRP, 32.95±11.61 pg/mL;SP, 27.80±7.51 pg/mL) and flunarizine group (CGRP, 25.13 ± 5.67 pg/mL; SP, 19.45 ± 6.10 pg/mL) were higher than in control group (CGRP, 14.44 ± 6.39 pg/mL; SP, 12.36 ± 4.22 pg/mL) (P<0.01). The levels of CGRP and SP in flunarizine group (CGRP, 25.13±5.67 pg/mL;SP, 19.45±6.10 pg/mL) were lower than those in CSD group (CGRP, 32.95±11.61 pg/mL;SP, 27.80± 7.51 pg/mL) (P<0.05). Conclusions Flunarizine hydrochloride can inhibit CSD and reduce the plama levels of CGRP and SP in the rat model of CSD.

3.
Chinese Journal of Neurology ; (12): 624-627, 2008.
Article in Chinese | WPRIM | ID: wpr-398551

ABSTRACT

Objective To determine whether rizatriptan has an effect on cortical spreading depression (CSD) and c-Fos expression within periaqueductal grey (PAG) induced by CSD in rats. Methods The experimental SD rats were randomly divided into group A injected with KCl, group B KCl plus rizatriptan and group C NaCL The number and amplitude of CSD were recorded after KCl or NaCl injection. C-Fos positive neurons of different layer were identified by the immunohistochemical technique 2 hours after the first injection of KCl or NaCl. Results There was no CSD in group C. The number of CSD in group A ( 10.70±3.23 ) was significantly more than that in group B (6.10±2.56, t = - 3.528, P < 0.01 ). The amplitude of CSD in group A ( 17.33 (95% CI 11.45--23.11 ) mV) was significantly greater than that in group B (11.82 (95%CI 9.24--14.70) mV, Z= -4.360, P< 0.01). There were more cFos-like immnoreactive neurons in every layer in group A than in group C (P < 0.01 ) and in group B (P < 0.05 ). Conclusion Rizatriptan has an inhibitory effect on CSD, which might induce the headache through exciting the neurons in PAG.

4.
Article in Chinese | WPRIM | ID: wpr-679080

ABSTRACT

0.05). Other raw scores of MMSE in the vascular dementia group were lower than those in the cerebral infarction group and the normal control group ( P 0.05). P 300 peak latency in the vascular dementia group prolonged significantly as compared with that in the cerebral infarction group and the normal control group ( P

5.
Article in Chinese | WPRIM | ID: wpr-679011

ABSTRACT

Objective To investigate the characteristics of brain imaging and its relationship with the cognitive disorders in vascular dementia patients. Methods The volumes of cerebral lobes and hippocampus formation in 30 ischemic vascular dementia patients and 30 normal controls were measured with MRI based technique. The indices of ventricles and cerebral sulci in 30 ischemic vascular dementia patients and 30 patients with ischemic stroke were calculated with CT based technique. The cognitive functions were assessed by psychometric testing (Mini Mental State Examination MMSE, Brief Screening Scale for Dementia BSSD, Raven's Standard Progress Matric RSPM) in all subjects. Results The volumes of frontal and temporal lobes in vascular dementia patients were smaller than those in ischemic stroke patients and normal control subjects ( P 0.05). The decrease of the volumes of the frontal and temporal lobes were positively correlated with the decrease of MMSE and BSSD scores. The cognitive disorders were more severe in the ischemic vascular dementia patients with pathological foci in the frontal and temporal lobes, multiple infarcts, and the total volume of infarcts greater than 50 mm 3 ( P

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