Clostridium butyricum was incubated in 10m mol, 30m mol 50m mol and 70m mol phosphate buffer medium (pH 7.0). With the high concentration buffer, the pH value decreased more slowly. The H_2 evolution hydrogenase kept on high activity level for a longer time, While the H_2 uptake hydrogenase kept constant. So more hydrogen was produced. The hydrogen production nearly doubled in 70m mol phosphate buffer than in 10m tool phosphate buffer. The result shows that to keep pH constant can increase the H_2 production of C. butyricum.

The nerve tissue engineering is to apply scalfolds and seed cells for the treatment of injury or disease of nerve system by restoring their anatomic structures and funetiorm.The scaffolds played important roles in supporting and conducting axonal regeneration.They could also limit the in-growth of scar tissue and hence help to build the connection between axonal and target cell.Self-assembling peptide scaffold is one of the excellent material used is nerve tissue engineering.This article reviews the self-assembling peptide based scaffolds for nerve tissue engineering and discusses the unsolved problems in the fields and the trend d the related research in the future.

Objective:To investigate the effect of acupuncture combined with cognitive behavior therapy on insomnia.Methods:A total of 90 patients with insomnia who received treatment in Department of Acupuncture and Moxibustion, Quzhou Municipal Hospital of Traditional Chinese Medicine, China from June 2018 to June 2020 were included in this study. They were randomly assigned to receive acupuncture combined with cognitive behavior therapy (combined treatment group, n = 46) or cognitive behavior therapy (control group, n = 44). The Hamilton Rating Scale for Depression (HAMD) score, the Hamilton Anxiety Scale (HAMA) score, the insomnia severity index (ISI), sleep onset latency, total sleep time, wake-up times after sleep onset, bedtime, sleep quality were compared between the two groups. Results:At the end of treatment, the cure rate, effective rate and total effective rate in the combined treatment group were significantly higher than those in the control group (cure rate: 28.26% vs. 11.36%, χ2 = 4.013, P = 0.045; effective rate: 54.35% vs. 31.82%, χ2 = 4.649, P = 0.031; total effective rate: 95.65% vs. 79.55%, χ2 = 5.438, P = 0.020). The HAMA score [(13.05 ± 2.19) points], ISI score [(13.01 ± 3.03) points], sleep onset latency [(28.03 ± 7.50) min] and wake-up times after sleep onset [(1.36±0.91) times] in the combined treatment group were significantly lower or shorter than those in the control group [(14.92 ±3.04) points, t = 1.803, P = 0.040; (15.02 ± 3.22) points, t = 3.201, P = 0.031; (36.15 ± 7.87) min, t = 3.186, P = 0.033; (1.94 ± 1.05) times, t = 3.254, P = 0.027]. Sleep quality in the combined treatment group was significantly higher than that in the control group [(83.28 ± 5.41) % vs. (79.56 ± 5.20) %, t = 2.278, P = 0.043]. Conclusion:Acupuncture combined with cognitive behavior therapy exhibits better efficacy in the treatment of insomnia than cognitive behavior therapy alone and therefore the combined treatment is worthy of clinical application.

Objective:To investigate the diagnosis and treatment for incarceration of retroverted uterus in pregnant women.Methods:This study retrospectively recruited four gravidas with incarcerated retroverted uterus indicated by prenatal ultrasonography in Hunan Provincial Maternal and Child Health Care Hospital from August 2016 to February 2020. Clinical features, diagnosis, and treatment of these cases were described.Results:Vaginal bleeding or discharge were the main symptoms of the four cases and prenatal ultrasound suggested incarcerated retroverted uterus. Obstetric examination was performed for all cases, except one due to small gestational age, and bulging posterior fornix was found in one case. Three cases were diagnosed in the third trimester and one at 14 gestational weeks. In light of gestations, symptoms, and anterior uterine muscle thickness, three patients underwent planned cesarean sections with a median abdominal incision and a superior transverse uterine incision after fetal lung maturation acceleration. Uterus involution was good, and the incisions healed well in these three cases, with all neonates in good condition. Following a two-week knee-chest position treatment, the position of her uterus and bladder turned normal in case 4.Conclusions:Considering the atypical clinical presentations, clinicians should be aware of incarceration of retroverted uterus when related symptoms or signs were presented. Placenta previa might be the comorbidity and should be differentially diagnosed. The timing of a cesarean section is supposed to be determined based on multiple factors. Moreover, a median abdominal incision and a superior transverse uterine incision are recommended, and an anatomic landmark is often required for the latter's accurate position.

Objective: To investigate the expression and clinical significance of ribosome-binding protein 1 (RRBP1) in esophageal carcinoma. Methods: A total of 120 esophageal carcinoma patients admitted to Yulin First Hospital of Shaanxi Province from January 2010 to December 2014 were enrolled in this study. RRBP1 expression was detected in esophageal carcinoma and matched adjacent normal tissues by real-time quantitative PCR (qRT-PCR), Western blotting and immunohistochemical staining. The relationships of RRBP1 expression with clinicopathological futures and prognosis were statistically analyzed. Results: RRBP1 expression level was significantly higher in esophageal carcinoma tissues compared with matched adjacent normal tissues. In the mRNA level, the relative quantitative expression in tumor tissues was 3.5±1.3, and 1.0±0.3 in adjacent normal tissues, with a significant difference (t=19.130, P<0.001). In the protein level, the relative quantitative expression in tumor tissues was 1.0±0.4, and 0.3±0.1 in adjacent normal tissues, with a significant difference (t=4.225, P<0.001). The immunohistochemical results showed that RRBP1 high expression was found in 71 (59.2%) tumor tissues, and the proportion dropped to 11.7% (14/120) in adjacent normal tissues, with a significant difference (χ²=59.182, P<0.001). In addition, RRBP1 expression was correlated with lymph node metastasis and TNM stage (χ²=10.631, P=0.001; χ²=31.212, P<0.001). Survival analysis revealed that RRBP1 expression, lymph node metastasis and TNM stage were significantly correlated with patients′ prognosis (χ²=9.455, P=0.006; χ²=14.542, P<0.001; χ²=11.987, P<0.001). Cox regression analysis showed that high expression of RRBP1 (RR=2.441, 95%CI: 1.267-4.702, P=0.008), lymph node metastasis (RR=4.024, 95%CI: 2.180-7.424, P<0.001) and high TNM stage (RR=3.054, 95%CI: 1.452-6.421, P=0.003) were the risk factors for poor prognosis of esophageal carcinoma patients. Conclusion RRBP1 is highly expressed in esophageal carcinoma and can serve as a potential biomarker to predict patients′ prognosis.

Objective: To explore the mechanism of damaging effect of advanced glycation end products (AGEs) on human umbilical vein endothelial cell (HUVEC) in vitro. Methods: The HUVEC was incubated with exogenous AGEs for 12 h, and ergamine (Hi) and catalase (CAT) were used as control. The activity, monolayer permeability, apoptosis rate, biochemical indexes and morphous changes were detected in HUVEC. Results: The activities of HUVEC were dose-dependently reduced by exogenous AGEs(40 mg/L, 120 mg/L and 160 mg/L), meanwhile the monolayer permeability, the malondialdehyde (MDA) content and apoptosis rate were increased，the activity of superoxide dismutase（SOD）was decreased（P < 0.05, respectively). There was no significant difference in damaging effect between exogenous AGEs and Hi(P ＞ 0.05). The damaging effect of exogenous AGEs was obviously inhibited by CAT in HUVEC. Conclusion: Exogenous AGEs induced the damaging effect on vascular endothelial cells, which may be related to the oxidative stress.

ObjectiveTo assess the effects of intra-articular Hydromorphone with Ropivacaine for postoperative analgesia after arthroscopic knee surgery.Methods 90 patients undergoing arthroscopic knee surgery were randomly divided into 3 groups. Group R: 0.375% Ropivacaine 20ml; group H1: Hydromorphone 0.3 mg and 0.375 % Ropivacaine 20 ml; group H2: Hydromorphone 0.6 mg and 0.375 % Ropivacaine 20 ml. The visual analogue scale (VAS) at rest were recorded at 6, 12, 18 and 24 h after surgery, Duration of analgesia, number of patients and frequency requiring Parecoxib at 24 h after surgery were observed.Results Compared with group R, VAS of group H1 and group H2 were signiifcantly lower at 12 and 18h after the operation, duration of analgesia was much longer, number of patients and frequency requiring Parecoxib was lower in group H1 and H2 (P < 0.05); Compared with group H1, No signiifcant differences of VAS, duration of analgesia and number of patients and frequency requiring Parecoxib of group H2.Conclusions After knee arthroscopic surgery, intra-articular 0.3 mg Hydromorphone can signiifcantly improve the efifcacy of Ropivacaine for postoperative analgesia; the efifcacy of Hydromorphone can’t increased with the increase of dosage.

Objective To investigate the effects of cryopreservation on the growth and osteogenesis capa- bility of human bone marrow stromal cells(BMSCs)on demineralized bene matrix(DBM).Methods Bone marrow aspirates were obtained from the lilac crests of three donors.The BMSCs were isolated from the bone marrow by density gradient centrifugation.Cells of passage 3 were cryopreserved in liquid nitrogen for 24 hours,and then re- covered.The non-cryopreserved BMSCs were used as the control,The cryopreserved and control BMSCs were cul- tured in osteogenic media,collected and labeled with Dil to be seeded onto the DBM when cells were confluent.The percentage of BMSCs adhered to the DMB was detected.The cell morphology and matrices secreted by BMSCs on the DBM were observed by the inverted phase-contrasted microscope,fluorescence microscope and scanning electron microscope(SEM).The growth and viability of BMSCs on the DBM were determined using the modified MTT ashy. The osteogenesis ability of BMSCs on the DBM was determined by assessment of the alkaline phosphatase(ALP) activity and osteocalcin(OCN)content.Results The percentages of the cryopreserved and control cells adhered to DBM were(97.25?1.17)% and(97.00?1.09)% respectively.The cells adhered well to the DBM and grew rapidly.Large amounts of matrices on the DBM were observed by the light microscope and SEM.The cells embedded in the matrices could be observed by fluorescence microscope.There were no significant differences in the assay values of MTT,ALP and OCN between the cryopreserved and control BMSCs on the DBM.Conclusion Since cryopreservation does not affect the growth and osteogenesis capability of BMSCs on DBM,the cryopreserved BMSCs can be used as a cell source in bone tissue engineering.

Objective To analyze the association between the polymorphism of 5509-5511delCAA in exon4 of Tim-1 gene and the susceptibility to rheumatoid arthritis(RA)in a group of Han population from Yunnan province.Methods The PCR-DNA se-quencing analysis was used to detect the polymorphism of 5509-5511delCAA in exon4 of Tim-1 gene in 196 RA Han nationality pa-tients and 190 individuals of healthy physical examination(control).The ELISA method and indirect immunofluorescence assay was adopted to detect the three related aotuantibodies of RA,including the rheumatoid factors(RF)and the anti-cyclic citrullinated pep-tide(Anti-CCP)and the anti-keratin antibodies(AKA).Results There were statistically significant differences in genotype and al-lele frequency of 5509-5511delCAA between the RA group and the control group(P <0.05);the positive rate of RF and the anti-CCP between different genotypes of 5509-5511delCAA in the RA group had no statistically significant differences(P >0.05 ),but the positive rate of AKA between different genotypes of 5509-5511delCAA in the RA group had statistically significant differences (P <0.05).Conclusion The 5509-5511delCAA site of Tim-1 exon4 has the polymorphic variation,the 5509-5511delCAA genotype maybe related with the genetic susceptibility to RA in Han population of Yunnan province,the different genotypes does not affect the expression of RF and the anti-CCP,but affects the expression of AKA.

ObjectiveTo analyze the Envelope (E) gene of type 1,2,3 dengue virus isolated fromGuangzhouin2010, andtoinvestigatetheinfectionsourceandvirusgenotypes.MethodsEighty-five serum samples were collected from 85 patients in acute phase of dengue fever.Dengue virus was cultured and isolated by C6/36 cells.The whole length of E gene was amplified by reverse transcriptase-polymerase chain reaction (RT-PCR) and then sequenced.The phylogenetic tree was drawn by neighbor-joining method.The bioinformatics analysis was performed by combining the phylogenetic information and the epidemiologic data.ResultsSix strains of type 1 dengue virus,two strains of type 2 dengue virus and six strains of type 3 dengue virus were isolated from 85 samples.The E gene sequence of these strains was obtained by sequencing.The phylogenetic analysis showed that type 1 and 3 dengue virus belonged to two genotypes (Asian and South Pacific ocean,India subcontinent and Southeast Asia/South Pacific ocean,respectively),and type 2 dengue virus belonged to one genotype (Malaysia/India subcontinent).ConclusionIt's presumed that all strains of type 2 dengue virus are imported,four strains of type 1 dengue virus are imported and four strains of type 3 dengue virus arc imported,the remaining two stains of type 1 and two stains of type 3 dengue virus need mosquito intermediary research further to prove their origins.