ObjectiveTo observe changes of calcitonin gene related peptide (CGRP) and aetylcholinesterase (AChE) in motor endplate (MEP) after complete spinal cord injury (SCI) in the rat.MethodsSCI model of Wistar rats were established by transecting T10 spinal cord completely. The venters of the tibial anterior muscle were taken at 1, 2, 4 and 8 weeks postoperatively to carry out the experiment.The changes of CGRP and AChE in the MEP were investigated with immunohistochemical test.ResultsAfter complete SCI, the quantity and distribution of CGRP decreased in MEP of 1-week sample, and the changes of AChE were observed until 4-week sample, and although the staining was light and sparse, CGRP and AChE existed in MEP during 2 months postoperatively.ConclusionThere is degeneration of MEP in skeletal muscle after upper motor neuron injury; CGRP and AChE are related to the degeneration of MEP; CGRP test can show the changes of MEP earlier.

Objective To investigate the application of Neurological Classification of Spinal Cord Injury (ASIA) in China.MethodsThe articles were retrieved in CNKI website (www.cnki.net),full-text Chinese journal database using the following parameters:searching words:"spinal cord injury" and "ASIA",publication time:1979-2006.Results164 articles were harvested,and 140 relevant papers of them were selected for analysis.ConclusionASIA Classification is widely used in China(Mainland).Constructive suggestions for the modification of this Classification were accumulated,while delayed use and misuse of it were found in some studies.

Aim To observe the influences of ginsenoside Rg1 on the spontaneous contraction of small intestine smooth muscle of rabbits in vitro and explore the mechanism.Methods With the isothermal perfusion of small intestine in vitro,the influences of ginsenoside Rg1 on the spontaneous contraction of small intestine was observed and the mechanism of ginsenoside Rg1 was studied.Results Ginsenoside Rg1 reduced the amplitude of contraction of small intestine smooth muscle in rabbits in a dose-depended manner.Bay K8644 and nitro-L-arginine methylester(L-NAME)could completely block the inhibition of ginsenoside Rg1 on the contraction of small intestine smooth muscle.Ginsenoside Rg1 inhibited the intracellular calcium-depended contraction induced by rynodine in the Ca2+ free Tyrode's solution.Conclusions Ginsenoside Rg1 inhibits the contraction of small intestine smooth muscle of rabbits in vitro.The mechanism may be related to increase NO concentration in small intestine smooth muscle so that it inhibits extracellular Ca2+ inflowing via cell membrane and intracellular Ca2+ releasing via sarcoplasmic reticulum.

Objective To prepare nifedipine( NF)sustained-release pellet tablets,and study of its release behavior in vitro. Methods Soluplus was selected as a carrier to prepare solid dispersion of NF by hot melt extrusion technique( HME), and the ratio of the drug to carrier was 1:1. The samples were validated as the solid dispersion by differential scanning calorimetry(DSC). Extrusion-spheronization technique was introduced to prepare NF pellets and EudragitRS 30D was used as the coating material. The NF sustained-release tablets were prepared by direct compression of the coated pellets and suitable excipients. Results The release data in vitro proved that the drug release from the tablets was steady and complete over 24 hours. Conclusion The release of NF from sustained-release tablets is slow and steady. The method is easy to operate. The in vitro drug release pattern follows first-order kinetics.

Objective To identify the distribution feature of methylenetetrahydrofolate reductase (M T HFR) gene polymorphism of Buyi ,Dong ,Miao nationality in Guizhou .Methods The MTHFR(677 and 1 298) genotypes of Buyi ,Miao and Dong healthy indi-viduals were determined by TaqMan-MGB probe genotyping method and constructed haplotypes .Results There were significant difference of MTHFR 677C/T genotype and allele frequencies among 3 groups(P<0 .05) ,There was significant difference of geno-type between Buyi and Miao nationality ,and there were significant differences of genotype frequencies in Buyi nationality and Dong and Miao nationality(P<0 .01) .There were no differences of MTHFR 1298A/C genotype frequencies among Buyi ,Dong and Miao nationality(P> 0 .05) .Buyi nationality had the lowest frequency in double wild homozygous type (677CC/1298AA) ,677TT/1298CC double mutation homozygous and 677TT/1298AC combination in above three minorities was not found .There were linkage disequilibrium between 677C/T and 1298A/C in Buyi and Miao nationality .Conclusion The genotypes frequencies of MTHFR 677T T/1298AC are significant differences among different regions and different ethnic groups .

OBJECTIVE: To study the experience of clinical features and treatment of deep cervical necrotizing fasciitis. METHOD: All 29 cases of cervical necrotizing fasciitis patients were diagnosed by CT, 12 cases underwent tracheostomies, lateral neck incisions and drainage operations, the other 17 patients underwent lateral neck incisions and drainage operations. Sequently washing, dressing changes and anti infection treatments were taken. RESULT: Twenty-eight cases were cured, 1 cases died. During a follow-up of half a year,no relapse. CONCLUSION When patient was sufferd the cervical necrotizing fasciitis, surgical operation for exploration should be taken as soon as possible,and incision and drainage in the treatment of cervical abscess would obtain a satisfactory curative effect, which would prevent serious complications.
Adult ; Aged ; Fasciitis, Necrotizing ; diagnosis ; surgery ; Female ; Humans ; Male ; Middle Aged ; Neck

Objective To evaluate the effectiveness and safety of BiPAP non-invasive ventilation on COPD patients during acute exacerbation(AECOPD).Methods 20 COPD patients were ventilated using BiPAP non-inva- sive ventilation through a nose or mouth-nose mask.Their vital signs(RR,HR and BP)and arterial blood gases indi- cators(pH,PaCO_2,PaO_2 and SaO_2)before and after ventilation were monitored and the clinical effectiveness was ob- served.Results The vital signs and arterial blood gases indicators of 17 of the 20 AECOPD patients were improved. PaCO_2 was lowered,pH,PaO_2 and SaO_2 were elevated,and the difference before and after ventilation was statistically significant(P＜0.05).Conclusion BiPAP non-invasive ventilation can improve the vital signs and physiological in- dicators of AECOPD patients,relieve their respiratory muscle fatigue and prevent them from exacerbation of respira- tory failure,thereby lower the need for endotracheal inrubation.

Objective To investigate the structural and functional changes of lower motor neuron distal to the site of spinal cord injury in rats. Methods Seventies Sprague-Dawley rats were divided randomly into 6 groups: sham-operation group (controls, n=10) and 3 day group (n=10), 1 week group (n=10), 2 week group (n=10), 4 week group (n=15) and 8 week group (n=15) after spinal cord transaction at T10. Neuronal apoptosis and acetylcholinesterase (AChE) activity of spinal cord at L4- 6 were observed by using the terminal deoxynucleotidal transferase- mediated DUTP-biotin nick end labeling (TUNEL) method and the semiquantitative enzyme cytochemistry, respectively. Results The assessment of apoptosis by TUNEL labeling showed that fluorescent markers were observed occasionally in anterior horn distal to the site of injury. The optical density (OD) value of AchE positive motor neurons (area > 300 μm2) initially decreased about 3 days after transaction and then overshot 1 week or so. However, after that, the OD value decreased again, the lowest about 4 weeks. Then the OD value increased again, though at 8 weeks was still lower than that of controls (P<0.05). Conclusion The findings on indistinctive apoptosis provided the proof of no significant changes of lower motor neuron distal to the site of transection. Semiquantitative histochemical results about AChE reflected marked metabolic changes of motoneurons caudal to the transaction, which represented as part of functional reorganization.

Objective To evaluate the clinical diagnostic value of nucleic acid amplification (TB- RNA),bacteriophage-based assay,3D culture and smear on the detection of Mycobacteria tuberculosis.Methods 291 clinical sample including 110 sputum,54 thoracic fluid,37 throat swab,31 bronchial fluid,13 cerebrospinal fluid,12 urine,8 lymph fluid and 20 others (pericardial effusion,feces, blood and abdominal fluid) and gynecological specimen (including 6 leucorrhoea and menstrual blood) were analyzed by these four methods.Results Among the 291 clinical samples,the positive rate of mycobacteria tuberculosis for TB-RNA,bacteriophage-based assay,3D culture and smear were 37.1%,28.9%,27.5% and 10.3%.The sensitivity and specificity of the TB-RNA,bacteriophage-based assay,3D culture and smear were 54.3% & 100%,41.7% & 88.9%,31.7% & 93.5% and 14.6% & 98.9%,respectively.Conclusions TB-RNA is an effective clinical diagnostic method for Mycobacteria tuberculosis.Although the sensitivity of smear is poorer than others,it is a universal testing method in clinical laboratory due to low cost.The positive rate of mycobacteria tuberculosis for 3D culture is lower than that of bacteriophage-based assay and TB-RNA.Although the time to result for 3D culture might last for few weeks,the isolates can be used for drug resistance screening and bacterial identification.

Objective To investigate the clinical application of multiplex allele-specific PCR assays for simultaneous detection of the mitochondrial 12S rRNA A1555G and C1494T mutations associated with aminoglycoside-induced hearing impairment.Methods Three standard plasmids of different genotypes (wild-type, A1555G mutant and C1494T mutant) were constructed for templates and allele-specific primers aiming directly at wild-type and mutant of mitochondrial DNA nt1555 and nt1494 were designed for developing a multiplex allele-specific PCR technique to detect the A1555G and C1494T mutations.Then the method was applied to clinical screening of 138 non-syndromic hearing loss subjects and confirmed by DNA sequencing.Results Multiplex allele-specific PCR was successfully applied to the detection of A1555G and C1494T mutations in a cohort of 138 Han Chinese genetically unrelated hearing-loss subjects.Finally, 11(7.97%) unrelated affected subjects harbored the A1555G and C1494T mutations in the 12S rRNA gene(10 cases for A1555G and 1 cases for C1494T), which was well consistent with results of DNA sequencing [7.97%(11/138), Kappa=1.000, P＜0.01].Conclusion This study indicates that the multiplex allele-specific PCR assay is useful, convenient and reliable in the detection of the A1555G and C1494T mutations, which could identify the subjects at risk and effectively prevent of aminoglycoside-induced hearing loss.