Objective　To monitor KBD prevalence rate in Changdu of Tibet.Methods　The aged 7～12 year children are tested with X- ray and epidemiological investigation.Results　Xizang are still high yet,the 3 of 4 porints X-rates are more than 20% and the highest one is 55.34%.Conclusions　The Changdu is the severest point of KBD in our country.

This paper is to report our results of the observation on the changes of the pulmonary water content of the rats and mice after their exposure to a simulated altitude of 6000 meters above sea level for seven days.It was found that the changes of the pulmonary water content varied with the duration of exposing to the high altitude. It was lower than the control value on the first day of exposure, and then it increased approaching or even being a little higher than the control value on the second and third day. But it decreased and was below the control value again from the fourth day to the seventh day. The lung weight was increasing continuously in the same period.In addition, there were progressive increase of both the wet-lung/body and dry-lung/body indices, progressive decrease of left/right ventricles ratio, and gradual rising of hemoglobin in the animals studied.

Rats were made to bleed and about 40% of the total blood volume was lost. A replacement of Ringer's solution of the volume four times the lost blood volume was given and the animals were closely monitored for 24 hours. The hemoglobin level of the animals was low throughout the course of observation. The plasma colloid osmotic pressure reached the lowest point 15 minutes after bleeding, and then gradually rising up returned to a level about 90% of the control value at the end of 24 hours. The relativity between the plasma colloid osmotic pressure and the lung water content was quite significant in those rats in a low altitude environment (P0.05).The result indicates that the increased lung water content due to decreased plasma osmotic pressure could not be made further worse by hypoxia due to high altitude. The characteristic pulmonary hemodynamic changSs caused by hypoxia might be considered as the explanation of the phenomenon.

Child ; Graft Survival ; HLA Antigens ; genetics ; immunology ; Hematopoietic Stem Cell Transplantation ; Humans ; Polymerase Chain Reaction ; Tissue Donors ; Transplantation Chimera ; genetics ; Transplantation Conditioning ; methods ; Transplantation, Homologous ; immunology

BACKGROUND: Donor complications have been detected following autologous tendon transplantation for posterior cruciate ligament reconstruction. Although artificial tendon development and tissue-engineered tendon have achieved great progresses, there are some issues in clinical application. Since 1980's, allogenic tendon transplantation has aroused increasing attention. OBJECTIVE: To explore the selection of allogenic tendon materials and the effect of their application on reconstructing posterior cruciate ligament. METHODS: A total of 17 patients with posterior cruciate ligament injury of knee joint were treated with cryopreserved allogenic tendon by Tibial-inlay technique. During the operation, two tracts of tendons soaked in gentamicin saline for 15 minutes were conduplicated, and one end of the tendon was cancellous bone screw and fixed to the tibia attachment point of posterior cruciate ligament, and the other end was introduced into the joint through retention suture. The posterior joint capsule was repaired. The patient was placed at supine position, and the knee was flexed for 90°. The other end of the graft was introduced to femoral tunnel, and anterior drawer was tensed, and fixed by screw. RESULTS AND CONCLUSlN: The preoperative posterior drawer test of patients was >2+, including 7 cases of 3+ and 6 of 4+. The postoperative posterior drawer test was 0 in 4 cases, 1+ in 8 cases, 2+ in 4 cases and 3+ in 1 case, suggesting the posterior movement of the knee joint was significantly improved. Lysholm scores of patients were (48.5±4.3) points before operation and (88.3±5.4) points after operation. Results show that cryopreserved allogenic tendon by Tibial-inlay technique could restored function of posterior cruciate ligament with a favorable effect.

Objective To evaluate the effectiveness of suberselective uterine arterial embolization for uterine fibroids.Methods Uterine arterial embolization with golyvimylalcohol(PVA) particles or Iodized oil and Gelfoam or Pingyangmycin lipiodol and Gelfoam was performed in 182 patients with uterine fibroids.Results Bilateral and unilateral superselective uterine arterial embolization were performed in 173 cases and 9 cases respectively. 6～28 months (mean 11 months) after the procedure, complete disappearance of tumor(16 cases), an average shinkage of 67% in tumor volume(152 cases) and a mean 42% reduction of uterine volume were obtained in 168 followed-up cases. The clinical symptoms were relieved significantly.The main side effets were hypogastic pain(135/182).Conclusion Superselection uterine arterial embolization is an effective and microinvasive method in treating uterine fibroids.

OBJECTIVETo explore the risk factors of neural tube defects (NTDs) in Shanxi province where the incidence of NTDs had been the highest in China.

METHODS1:1 matched case-control study was used. All the objects collected from hospitals were investigated in standardized questionnaires about susceptible risk factors for NTDs and were genotyped for methylenetetrahydrofolate reductase (MTHFR) C667T polymorphism by PCR-RFLP method. The risk factors of NTDs were analyzed by conditional logistic regression and by SPSS 11.5 statistical software. We also analyzed the univariable and multi-variables in order to independently investigate the MTHFR genotype and maternal periconceptional adverse factors influencing on NTDs.

RESULTSComparing MTHFR gene frequency between case group and control group, our results showed that three genotypes were found in MTHFR C677T. There was significant difference between two groups at 0.01 level (chi2 = 14.61, P = 0.001) about the three genotypes. The MTHFR T allele frequency of mother with NTDs (60.6%) was higher than that of the control (41.4%), and there was significant difference between them (chi2 = 14.59, P < 0.001). By univariate conditional logistic regression analysis, it was indicated that 15 factors were correlated with NTDs (P < 0.05) in the level alpha = 0.05. By multi-variables conditional logistic regression analysis, four factors were connected to NTDs: frequency of pregnancy (OR = 2.87, 95%CI: 1.28 - 6.44), contacting chemical combination in early pregnancy (OR = 16.18, 95%CI: 1.18 - 221.59), frequent taking of germinated potato (OR = 4.66, 95%CI: 1.78 - 12.17) and MTHFR C677T mutation (OR = 2.13, 95%CI: 1.08 - 4.21).

CONCLUSIONFactors as 'frequency of pregnancy', 'history of contacting chemicals', 'taking germinated potatoes in early pregnancy', as well as 'MTHFR C677T mutation' in mothers were important risk factors affecting the occurrence of NTDs in Shanxi province.

Adult ; Case-Control Studies ; China ; epidemiology ; Female ; Gene Frequency ; Genotype ; Humans ; Logistic Models ; Methylenetetrahydrofolate Reductase (NADPH2) ; genetics ; Mutation ; Neural Tube Defects ; epidemiology ; genetics ; Parity ; Polymorphism, Genetic ; Pregnancy ; Risk Factors ; Surveys and Questionnaires

AIM: To facilitate the suicide gene delivery into neoplasm, a chimeric gene of HSV-tk and green fluorescent protein (gfp) was constructed. METHODS: Molecular cloning technique was used to construct this kind of eukaryotic vector. The internal ribosome entry site (IRES) of encephalomyocarditis virus (EMCV), which could coordinate expression of two genes in a single vector, was optioned. By using liposome-mediated transfection, eukaryotic expression vector tgCMV/hytk-IRES-gfp was transfected into human bladder carcinoma cells EJ. RESULTS: A bicistronic eukaryotic vector carrying gfp and hygromycin phosphotransferase-thymidine kinase fusion (hytk) gene was constructed. The results of PCR and microscopy detection show that the hytk-IRES-gfp gene was successfully transferred into EJ cells. There were no differences in the growth pattern or the morphology between EJ and EJ/hytk-GFP cells. In vitro experiments demonstrated dose- and time-dependent cell killing by transduction of the hytk-IRES-gfp gene followed by GCV treatment. The IC50 (the concentration required to elicit 50% growth inhibition) was 2.16 mg/L in treatment with GCV for 72 hours. CONCLUSION: These results suggest that this new kind of eukaryotic vector could serves as a new tool and method for neoplasm gene therapy.

Human ScFv against botulinum neurotoxin serotype A(BoNTa) was modified by fusing human IgG1 Fc to C terminal of ScFv. ScFv-Fc fusion protein was expressed at high level over 30% of total host cell proteins in E.coli. Recombinant protein existed in inclusion body form. Renatured ScFv-Fc was purified to 90%~95% by Protein G Sepharose column. In vitro ScFv-Fc could bind specific to toxiod BoNTa in ELISA. Recombinant ScFv-Fc had similar relative affinity to parent ScFv and had improved stability.

In this study, the time-dependent changes on dynamic computed tomograph (CT) of radiation-induced liver injury in gastric cancer patients was examined. The CT images of 52 gastric cancer patients who had received chemoradiotherapies were reviewed on the PACS system. Dynamic CT scan was performed in all the subjects. Our results showed that 18 patients were found to have radiation-induced liver injury. The CT findings of radiation-induced liver injury in gastric cancer patients tend to show up one month after radiation treatment. The damaged area was of low density on all three phases, and then it was enhanced on portal vein phase or delay phase. The focal radiation reaction of liver without basic disease vanished 9-11 months later after treatment. We are led to conclude that dynamic CT is of help in the diagnosis of CRT-induced liver injury, and it may be the method of choice for following up the whole course of the CRT-induced liver injury, i.e., form hepatic damage to healing. The classification of CT findings we recommend can avoid the influence of technological factors, and thereby serve as a better guide for treatment of CRT-induced liver injury.