OBJECTIVETo study the effects of sacral nerve root electrostimulation (SNS) on the colon function and its mechanisms in rats with spinal cord injury (SCI).

METHODSOne hundred and four Wistar rats were divided into three groups: A, B and C. A group ( n = 24) was divided into three subgroups (n = 8) for studying the bioelectricity: Normal group (NG), SCI group (SCI) and SCI group with SNS(SNS); B group( n = 24) was divided into three subgroups( n = 8) for studying the colon motility: NG, SCI and SNS. C group( n = 56) were divided into three groups for studying the change of morphology and neurotransmitters(SP and VIP): NG (n = 8), SCI (n = 24), and SNS (n = 24) . In SCI and SNS, included of three subgroups: 24, 48, 72 h after spinal cord injury (n = 8).

RESULTSIn SCI group, the activity of bioelectricity in proximal and distal colon was reduced; the colon motility was lessened, and colon mucosa appeared different degree of damage; cell-cell connections between intestinal epithelial cells were destroyed. The expressions of substance P(SP) and vasoactive intestinal peptide (VIP) in colon were decreased obviously. SNS was found to activate the bioelectricity, promote the colon motility, improve the intestinal mucosal, and increase the expressions of SP and VIP. Conclusion: SNS can activate the peristalsis, rehabilitate the motility of denervated colon, protection of the intestinal mechanical barrier between intestinal epithelial cells and tight junction, rebuild the colon function through activating the bioelectricity and increase the expressions of SP and VIP.

Animals ; Colon ; physiopathology ; Electric Stimulation Therapy ; Epithelial Cells ; drug effects ; Intestinal Mucosa ; drug effects ; Lumbosacral Region ; innervation ; Neurotransmitter Agents ; metabolism ; Rats ; Rats, Wistar ; Spinal Cord Injuries ; therapy ; Substance P ; metabolism ; Vasoactive Intestinal Peptide ; metabolism

OBJECTIVETo observe the ultrastructural change of the route of gut bacterial translocation in a rat with spinal cord injury (SCI).

METHODSForty Wistar rats were divided into the following groups: control group and 3 SCI groups (10 in each group). The rats in the SCI groups were established SCI model at 24 h, 48 h, and 72 h after SCI. Small intestine mucous membrane tissue was identified and assayed by transmission electron microscope, scanning electron microscope and immunofluorescence microscopy.

RESULTSSmall intestine mucous membrane tissue in control group was not damaged significantly, but those in SCI groups were damaged significantly. Proliferation bacteria in gut lumen attached on microvilli. The extracellular bacteria torn the intestinal barrier and perforated into the small intestinal mucosal epithelial cell. The bacteria and a lot of particles of the seriously damaged region penetrated into the lymphatic system and the blood system directly. Some bacteria were internalized into the goblet cell through the apical granule. Some bacteria and particles perforated into the submucosa of the M cell running the long axis of M cells through the tight junctions. In the microcirculation of mucosa, the bacteria that had already broken through the microvilli into blood circulation swim accompanying with erythrocytes.

CONCLUSIONThe routes of bacterial translocation interact and format a vicious circle. At early step, the transcellular pathway of bacterial translocation is major. Following with the destroyed small intestine mucous, the routes of bacterial translocation through the lymphatic system and the blood system become direct pathways. The goblet cell-dendritic cell and M cell pathway also play an important role in the bacterial translocation.

Animals ; Bacteria ; Bacterial Translocation ; Epithelial Cells ; microbiology ; Goblet Cells ; microbiology ; Intestinal Mucosa ; microbiology ; pathology ; ultrastructure ; Intestine, Small ; microbiology ; pathology ; ultrastructure ; Microvilli ; microbiology ; Rats ; Rats, Wistar ; Spinal Cord Injuries ; microbiology

Hematopoietic Stem Cell Transplantation ; adverse effects ; Humans ; Male ; Middle Aged ; Purpura, Thrombotic Thrombocytopenic ; etiology ; Transplantation, Autologous

Objective: To explore the relationship between social support and internet addiction in undergraduates. Method: 382 undergraduates were divided into three groups according to their social support score and perceived social support score at end of the first term in their freshmen year. They were followed for 4.5 years to collect the incidence of internet addiction. Results: The group with less social support or less perceived social support had higher incidence rate (15.7%, 7.9% and 2.4% with social support score 0～60, 61～73 and higher than 73 respectively, ?2=9.49,P=0.009). There was obvious dose-effect relationship between social support and incidence of internet addiction. Conclusion: Less social support is a risk factor of internet addiction.

Objective To sum up the experience of renal transplantation in order to improve transplant effect and enhance the long-term survival and recovery rate.Methods The data of renal transplantation of 1 124 cases who received renal transplantation from Jul. 1978 to Oct. 2001 were summarized. All the possible factors that could influence the transplant effect such as pre-operative preparation, HLA match, donors' quality, surgical procedure, immunosuppressive therapy and so on were analyzed. Results The 1-, 3-, 5-year survival rate (%) of patient/kidney was 83.1/ 70.3, 74.6/ 68.6 and 62.6/ 56.1 respectively. The rate of AR was decreased significantly from 3.09?% only with LXM to 0.89?% with LXM test in combination with HLA serological test. The rate of HAR and AR in 130 cases with additional PRA test were lower than those only with LXM test.Conclusions The well pre-operative preparation, the ideal HLA match, the high quality of donor's kidney and transplant operation were keys for successful renal transplantation. Reduction of the complications, individual and combined medication in reason and long-term follow-up were very important in the long-term survival time.

The paper introduces the development of hematology analysis technique in recent 10 years,and mainly concentrates in WBC differential technique,the extended functions and automation.The clinical application of red cell volume distribution width,reticulated platelets and reticulocyte subpopulation are also described in the paper.The common problems in the usage of hematology analyzer and correction methods are pointed out.

Objective:To design and prepare repaglinide and metformin hydrochloride tablets for pilot scale test and industrial pro-duction. Methods:Dissolution was applied to optimize the formula and preparation process. Results: The tablets were prepared ac-cording to the determined formula and process with poloxamer 188, meglumine, PVP K30, croscarmellose sodium, microcrystalline cellulose PH101, sorbitol, magnesium stearate and coating powder as the adjuvants. The dissolution behavior of the tablets in four media was similar to that of the reference. Conclusion:The preparation process of repaglinide and metformin hydrochloride tablets is simple and feasible, and the quality is controllable and stable.

Objective To quantitatively assess cardiac intervals with tissue Doppler imaging(TDI) and normal reference values. Methods Apical 4 chamber, 2 chamber and long axis views of two-dimensional TDI were acquired in 29 healthy individuals(using GE Vivid 7 commercially ultrasound machine). The basal and middle segments in left ventricle(anterior septal, anterior, lateral, posterior, inferior and septal wall) and in the free wall of right ventricle were analyzed with tissue velocity imaging(TVI) model.Cardiac intervals of each segment, which included the isovolumic contraction time, contraction to peak time, insovolumetric relaxation time, rapid filling time and artrial contraction time were measured using TVI in the left ventricle and free wall of the right ventricle. Results The successful rate of sample was 100% in basal segment of each wall. There were significant differences between the left and right ventricle in the isovolumetric contraction time, the systolic accelaration time, contraction to peak time, isovolumetric relaxation time, early diastolic time, diastasis and artrial contraction( P

Adult ; Female ; Humans ; Myocardial Infarction ; Puerperal Disorders

Objective To illustrate the evaluation effect of bivariate analysis of sensitivity and specificity meta-analysis model in diagnosis test to provide basis for selecting better evaluation method of diagnostic test.Methods Bivariate model was presented by reanalyzing the data from a published meta-analysis of two diagnostic techniques in diagnosis of schistosomiasis japonica.Results The bivariate model could directly provide summary estimates of(logit)sensitivity,specificity and DOR with corresponding 95% CI for two diagnostic tests(IHA and ELISA).Also,it could elicit any significant difference that existed among sensitivity,specificity and DOR between the two diagnostic methods,and incorporate any correlation that existed between sensitivity;specificity.Conclusion The bivariate model preserves the two dimensional nature of the original data,and separates effects of sensitivity and specificity,which is more rational than a net effect on diagnostic odds ratio scale as in SROC approach.The bivariate model is appropriate and agile,and can be used as an extension and improvement of the traditional SROC method.