Incidence of leptospirosis in Fujian province, 2015-2020 / 中华流行病学杂志

Objective: To analyze the incidence of leptospirosis in Fujian province from 2015 to 2020 and provide the scientific evidences for the risk assessment, prevention and control of leptospirosis. Methods: The incidence data of leptospirosis in Fujian during 2015-2020 were collected from China Information System for Disease Control and Prevention for a descriptive analysis, and software ArcGIS 10.3.1 was used for spatial autocorrelation analysis, and rats were captured in 17 surveillance areas during the same period, and the rat organs were collected for pathogen culture, the level of Leptospira antibody was detected in serum samples of rats, healthy population and the serum samples of patients sent by the hospitals. The infection status of Leptospira in human and rats were analyzed. Results: The incidence of leptospirosis in Fujian showed a downward trend from 2015 to 2020. A total of 176 cases of leptospirosis were reported. There were obvious seasonality and bimodal distribution. The majority of cases were farmers, accounting for 49.43% (87/176). Most cases were aged 30-69 years (85.80%, 151/176). The male to female ratio of the cases was 3.51∶1 (137∶39). Spatial autocorrelation analysis showed that leptospirosis had high or low clustering areas. From 2015 to 2020, the average capture rate of rats in 17 surveillance areas was 6.96% (1 519/21 838), Rattus losea, Rattus flavipectus and Niviventer fulvescens were the main species. The average positive rate of Leptospira antibody in rats was 28.64% (252/880). Java and Autumnalis were the predominant serogroups, accounting for 56.75% (143/252) and 17.46% (44/252), respectively. The average positive rate of Leptospira antibody in healthy population was 16.13% (254/1 575), and Autumnalis and Australis were the predominant serogroups, accounting for 71.65% (182/254). The confirmation rate of leptospirosis in patient serum samples sent by the hospitals was 2.23% (188/8 431), Autumnalis (56.38%, 106/188) and Hebdomadis (19.68%, 37/188) were the major serogroups. Conclusions: The incidence of leptospirosis in Fujian showed a downward trend from 2015 to 2020, there were obvious area clustering and seasonality. The high clustering areas were mainly distributed in northern, western and central Fujian. Java and Autumnalis were the predominant serogroups in rats. The infection rate in healthy population decreased year by year. Autumnalis and Hebdomadis were the main serogroups in population in Fujian.

Analysis of independent risk factors for early castrate-resistant after endocrine therapy in elderly patients with prostate cancer / 解放军医学杂志

[Abstract] Objective To analyze the independent risk factors for castrate-resistant prostate cancer (CRPC) after conservative endocrine therapy in elderly prostate cancer patients. Methods Totally 90 elderly prostate cancer patients undergoing endocrine therapy from July 2013 to July 2015 were included into this study as research objects. The basic data and pathological, and laboratory indexes were collected from them. The incidence of CRPC in 2 years after discharge was recorded by follow-up, the Cox risk regression model was used to analyze the high-risk factors of CRPC. The application value of the risk factors to predict CRPC were analyzed by receiver operating characteristic curve and the exponential equation was established to predict the occurrence of CRPC in elderly patients with prostate cancer for 2 years. Results Totally 90 patients were followed up for 24 months in average, of whom 2 cases were lost to follow-up, 26 developed CRPC, the incidence of CRPC was 29.55%. The Cox risk regression model showed that T stage (OR=3.823, 95%CI 2.137-6.839, P<0.001), Gleason score (OR=8.045, 95%CI 3.501-18.487, P<0.001), prostatic specific antigen (PSA) (OR=2.983, 95%CI 1.407-6.324, P=0.004) and prostate cancer gene 3 (PCA3) (OR=1.998, 95%CI 1.263-3.161, P=0.003) were the independent risk factors for prostate cancer progressing to early CRPC in elderly prostate cancer patients. The exponential equation for predicting CRPC model was 0.367X1+0.642X2+0.409X3 +0.815X4 according to the results of multivariate analysis (X1: T stage, X2: Gleason score, X3: PSA value, X4: PCA3 value), the AUC was 0.855 (β=0.056, 95%CI 0.745-0.965, P<0.001). The sensitivity was 0.919, the specificity 0.857, the Youden index 0.776, and the corresponding index of prognosis 1.325. Conclusion The T stage, Gleason score, PSA and PCA3 are independent risk factors for prostate cancer progressing to CRPC after endocrine therapy in elderly prostate cancer patients, can be used comprehensively to establish a model of predicting CRPC for improving the accuracy of judgments.

The Effect of FRAX on the Prediction of Osteoporotic Fractures in Urban Middle-aged and Elderly Healthy Chinese Adults

OBJECTIVE: We aimed to analyze the applicability of a fracture risk assessment tool for the prediction of osteoporotic fractures in middle-aged and elderly healthy Chinese adults. METHODS: A standard questionnaire was administered, and bone mineral density was measured in residents visiting the Dongliu Street Community Health Service Center. Paired t-tests were used to compare the FRAX-based probabilities of fractures estimated with and without consideration of bone mineral density. Risk stratification and partial correlation analyses were applied to analyze the associations between FRAX-based probabilities and body mass index or bone mineral density at different sites. RESULTS: A total of 444 subjects were included in this study. Of these subjects, 175 (39.59%) were diagnosed as osteoporotic, and 208 (47.06%) were diagnosed as osteopenic. The Kappa value for the detection of osteoporosis at the L1-L4 lumbar spine and femoral neck was 0.314. The FRAX-based 10-year major osteoporotic fracture probability and hip osteoporotic fracture probability estimated without considering bone mineral density were 4.93% and 1.64%, respectively; when estimated while considering bone mineral density, these probabilities were 4.97% and 1.54%, respectively. A significant positive association was observed between the FRAX-based fracture probabilities estimated with and without consideration of bone mineral density, while significant negative associations between body mass index and the estimated FRAX-based fracture probabilities after adjustment for age and the estimated FRAX-based fracture probabilities and femoral neck bone mineral density were identified. These results remained the same after controlling for lumbar spine bone mineral density. CONCLUSIONS: The Chinese FRAX model could predict osteoporotic fracture risk regardless of whether bone mineral density was considered and was especially appropriate for predicting osteoporotic fractures of the femoral neck.

Challenge and solution of eugenics and assisted reproduction in China / 第二军医大学学报

Human assisted reproductive technology has brought hope to the growing infertility population, but also has increased the risk of birth defects and even adult disease incidence. Here we discussed the gametes, embryos and maternal factors which affect eugenics and assisted reproductive safety. With the help of the new genomics technology such as the next generation sequencing, we can greatly reduce the incidence of hereditary birth defects, and prevent and control embryonic developmental risk of adult diseases.

Staged retrograde flexible ureteroscopic lithotripsy versus miniaturized percutaneous nephrolithotomy for renal stones of 2-4 cm in diameter: a randomized controlled trial / 南方医科大学学报

<p><b>OBJECTIVE</b>To compare the efficacy and safety of staged retrograde flexible ureteroscopic lithotripsy (FURS) and miniaturized percutaneous nephrolithotomy (m-PCNL) for treatment of renal stones of 2-4 cm in diameter.</p><p><b>METHODS</b>This randomized controlled trial was conducted in 70 patients with renal stones of 2-4 cm in diameter admitted in our hospital between January 2013 and December 2015. The patients were randomized to receive staged FURS (35 cases) or m-PCNL (35 cases), and the total treatment time, total hospital stay after procedure, total medical cost, treatment success, decrease in hemoglobin level and complications were compared between the two groups.</p><p><b>RESULTS</b>The treatment success rate was 100% in both groups, but the complete stone-free rate was significantly lowered in FURS group than m-PCNL group (65.71% vs 94.29%, P<0.01). The average decrease in hemoglobin level was 3.37∓1.56 g/L in FURS group and 11.93∓2.24 g/L in m-PCNL group (P<0.01). The overall complication rates in the two groups were 6.25% and 9.37%, respectively (P>0.05). Minor complications (grade I by Clavien-Dindo classification) occurred in one case in FURS group (fever) and two cases in m-PCNL group (self-limiting hematuria); major complications (grade II) occurred in one case in FURS group (steinstrase) and one case in m-PCNL group (blood transfusion). In staged FURS and m-PCNL groups, the mean total treatment time was 4.06∓1.11 vs 1.26∓0.47 weeks (P<0.01), the mean hospital stay after procedure was 3.66∓1.29 vs 5.13∓0.43 days (P<0.01), and the mean total medical cost was 54 291.00 RMB ∓6149.00 vs 23 482.00 RMB ∓2317.00 (P<0.01), respectively.</p><p><b>CONCLUSION</b>FURS is safe and effective for treatment of renal stones of 2-4 cm in diameter, and a staged procedure is necessary to achieve a stone-free status for large calculi. Both sophisticated equipment and rich surgical experience are essential to ensure treatment success.</p>

Paeoniflorin inhibits macrophage-mediated lung cancer metastasis / 中国天然药物

Alternatively activated macrophages are more frequently involved in tumor growth, angiogenesis, and immunosuppression. A previous study showed that paeoniflorin, the major active constituent of Paeonia lactiflora Pallas, can inhibit tumor growth and lung metastases of Lewis lung tumor-bearing mice. This study tried to investigate whether paeoniflorin inhibited lung cancer metastasis by inhibiting the alternative activation of macrophages (M2 macrophage). Using a viability assay, the cytotoxicity of paeoniflorin on Lewis lung cancer cells and peritoneal macrophages were investigated. In vitro scratch wound and in vivo lung metastasis experiments were used to test the ability to inhibit the migration of paeoniflorin and the function of M2 macrophages. Flow cytometry was performed to test the cell cycle of Lewis lung cancer cells, and to test the M2 macrophages in peritoneal macrophages and subcutaneous transplantable tumor. It was found that paeoniflorin showed no inhibitory effect on the growth of Lewis lung cancer cells and peritoneal macrophages of mouse in vitro. Paeoniflorin could attenuate the migration of LLC stimulated by alternatively activated macrophages (stimulated for 24 h and 48 h, paeoniflorin 1, 3, 10, 30, 100 μmol·L(-1), P < 0.01 or P < 0.05 vs control group). Paeoniflorin could decrease the cell populations at S phases (paeoniflorin 10, 30, 100 μmol·L(-1), P < 0.05 vs control group) and increase the cell populations at G0-G1 phases of Lewis lung cancer cells (paeoniflorin 100 μmol·L(-1), P < 0.05 vs control group) and reduce the numbers of M2 macrophages in peritoneal macrophages induced by IL-4 (paeoniflorin 1, 3, 10, 30, 100 μmol·L(-1), P < 0.01 vs Control group). Paeoniflorin could reduce lung metastasis of Lewis lung cancer cells xenograft and decrease the numbers of M2 macrophages in subcutaneous xenograft tumour in vivo (paeoniflorin 20, 40 mg·kg(-1), P < 0.01 vs control group). These results suggest that paeoniflorin could reduce lung metastasis of Lewis lung cancer cells xenograft partly through inhibiting the alternative activation of macrophages.

Treatment of children with EB virus infection by Chinese medicine: a clinical study / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To provide evidence for Chinese medical treatment of children with EB virus infection by exploring its clinical efficacy from multiple angles.</p><p><b>METHODS</b>Totally 81 children patients were randomly assigned to the treatment group (46 cases) and the control group (35 cases). Patients in the treatment group took Chinese medical decoction, while those in the control received intravenous dripping of Ganciclovir and oral administration of pidotimod. The treatment period for the two groups was 2 weeks. Patients were followed-up till the 12th week. Clinical symptoms such as fever, lymphadenopathy and hepatosplenomegaly, as well as lab indices such as abnormal lymphocyte percentage, EB virus antibody, virus DNA load, T cell subsets, immunoglobulin, and so on were observed before and after treatment, at week 4 and 12 of follow-ups.</p><p><b>RESULTS</b>(1) The total effective rate at week 2 was 95.6% in the treatment group, higher than that of the control group (94.3%), but there was no statistical difference between the two groups. (2) The time for defervescence, duration of pharyngeal hyperemia, duration of swollen tonsils was shorter in the treatment group than in the control group (P<0.05). The subsidence of lymphadenopathy, hepatomegaly, and abnormal lymphocytes was better in the treatment group than in the control group (P < 0.05). (3) The positive cases of peripheral blood hetero-lymphocyte was significantly reduced after treatment, at week 4 and 12 of follow-ups both in the treatment group and the control group (P < 0.01). The expression of IgA and IgM decreased after treatment in the two groups when compared with before treatment in the same group (P < 0.05, P < 0.01). IgG in the treatment group also obviously decreased after treatment, at week 4 and 12 of follow-ups (P < 0.05, P < 0.01), while it decreased only after treatment in the control group (P < 0.05). Activities of AST and ALT in the treatment group and the AST activity in the control group were markedly improved when compared with those before treatment (P < 0.05). Compared with the control group, the abnormal lymphocyte positive case number obviously decreased in the treatment group after treatment, at week 4 and 12 of follow-ups (P < 0.05). (4) After treatment, at week 4 and 12 of follow-ups, CD3+ and CD8+ significantly decreased; CD4+, CD4/CD8, and B cells significantly increased in the two groups, when compared with before treatment (P < 0.05). NK cells significantly increased more in the treatment group after treatment, at week 4 and 12 of follow-ups, higher than before treatment as well as the control group (P < 0.05). (5) EB viral DNA and EB viral CA-IgM negative conversion case numbers significantly increased in the two groups after treatment, at week 4 and 12 of follow-ups (P < 0.05). Compared with the control group, EB viral DNA and EB viral CA-IgM negative conversion case numbers significantly increased in the treatment group after treatment and at week 4 of follow-ups (P < 0.05).</p><p><b>CONCLUSIONS</b>Treatment of EB virus infection by Chinese medical treatment was effective. It could promote the recovery of EB viral infection, and reduce the risk of vicious disease after EB viral infection.</p>

Henoch-Sch（o）nlein purpura with central nervous system dysfunction in 18 children / 中华实用儿科临床杂志

Objective To investigate the clinical manifestations,laboratory examinations,treatments and prognosis of Henoch-Schn(o)lein purpura (HSP) children with central nervous system (CNS) dysfunction.Methods All clinical data of HSP patients with CNS dysfunction admitted to Beijing Children's Hospital Affiliated to Capital Medical University,from Jul.2007 to Nov.2012 were reviewed.Their manifestations,laboratory examinations,treatments and prognosis were analyzed.Results There were 18 patients with CNS dysfunctions in all 3512 HSP patients,the major presentations include convulsions,headache,altered level of consciousness and personality changes,et al.Six patients were investigate oligoclonal bands test in cerebrospinal fluid(CSF),4 cases of their results were positive.Thirteen patients did the electroencephalogram (EEG) examination,7 cases were abnormal.Ten patients did the brain CT scan,5 cases of their results were abnormal.Thirteen patients did brain MRI,9 cases were abnormal.After treatment,the CNS manifestations disappeared in all patients.Thirteen patients were follow-up,none of their CNS symptoms relapsed.Conclusions The presentations of patients with CNS system in HSP could be not so typical,and the condition of the patient could be more or less severe,while most of the prognosis of the patients are good.CSF oligoclonal bands test,EEG,brain CT and MRI are beneficial to the diagnosis and evaluation of the HSP associated with CNS dysfunction.

Clinical characteristics of juvenile dermatomyositis complicated with interstitial lung disease / 中华儿科杂志

<p><b>OBJECTIVE</b>To explore the clinical and laboratory features and the prognosis of juvenile dermatomyositis (JDM) complicated with interstitial lung disease (ILD).</p><p><b>METHOD</b>Data of 39 cases of JDM complicated with ILD hospitalized in Beijing Children's Hospital from January 2005 to December 2011 were collected. The clinical features, laboratory data and prognosis of these children were analyzed.</p><p><b>RESULT</b>Of the 39 cases studied, 16 were boys, and 23 girls. The average age of onset was 5.6 years, and 61.5% of the patients' age of onset (24 cases) was under 6 years. Rashes (17 cases, 43.6%), simultaneous eruption of rashes and muscle weakness (14 cases, 35.9%), fever (4 cases, 10.1%), or muscle weakness (3 cases, 7.7%) were common initial symptoms of the disease. Only 51.3% of the patients (20 cases) had the symptoms of respiratory system, but (24 cases) 61.5% were complicated with that of the gastrointestinal system; (27 cases) 69.2% had at the same time electrocardiographic and echocardiographic abnormalities. The chest high resolution computed tomography (HRCT) showed cord or band-like shadows in their lungs of more than half of the cases (25 cases, 64.1%), and other changes included ground glass-like shadow (10 cases, 25.6%), net and lineation-like shadow (9 cases, 23.1%), nodular change (5 cases, 12.8%). The patients complicated with lung essential infiltration accounted for as high as 71.8% (28 cases). These imaging changes were largely seen on both dorsal sides of their lungs. Severe patients also had mediastinal emphysema, pneumothorax, pneumorrhagia or aerodermectasia. Twenty-four patients underwent pulmonary function examination, and 62.5% of the patients' pulmonary function (15 cases) was abnormal. The fatality rate of the cases studied was 10.1%.</p><p><b>CONCLUSION</b>The imaging changes of patients suffering from JDM with ILD were often more severe as compared to the clinical symptoms, and were often complicated with damages to other systems and organs. The prognosis of those patients was poorer than others. Patients with JDM especially at a younger age of onset and with various organ damages should be examined with chest HRCT examinations as early as possible.</p>

Short reaction of C-peptide, glucagon-like peptide-1, ghrelin and endomorphin-1 for different style diet in type 2 diabetic patients / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Food composition and style is changing dramatically now, which causes inappropriate secretion of hormones from brain, gastrointestinal and endo-pancreas, may be related to unbalance of glucose in blood. The aim of this study was to explore the fast response of C-peptide, glucagon-like peptide-1 (GLP-1), ghrelin and endomorphin-1 (EM-1) to the eastern and western style meals in patients with type 2 diabetes mellitus.</p><p><b>METHODS</b>The study enrolled 57 patients with type 2 diabetes (20 men and 37 women, mean age (67.05 ± 8.26) years). Eastern style meal (meal A) and western style meal (meal B) were designed to produce the fullness effect. C-peptide, GLP-1, ghrelin and EM-1 were assessed before (0 hour) and after (2 hours) each diet.</p><p><b>RESULTS</b>The delta (2h - 0h) of C- peptide in meal A was significantly lower than that in meal B (P = 0.0004). C-peptide, GLP-1, ghrelin and EM-1 were obviously higher before meal B than those before meal A (P < 0.0001, < 0.0001, = 0.001, = 0.0004 respectively). Blood glucose 2 hours and 3 hours after meal B were higher than those after meal A (P = 0.0005, 0.0079 respectively). Correlations between GLP-1 and ghrelin were strongly positive before both meals and 2 hours after both meals and also in relation to the delta of meal A and meal B (r(A0h) = 0.7836, r(B0h) = 0.9368, r(A2h) = 0.7615, r(B2h) = 0.9409, r(A(2h-0h)) = 0.7531, r((2h-0h))B = 0.9980, respectively, P < 0.0001).</p><p><b>CONCLUSION</b>Western style meal (high fat and protein food) could make more response of C-peptide than eastern style meal, and could stimulate more gut hormones (GLP-1, ghrelin) and brain peptide (EM-1) at the first phase of digestion.</p>

Effect of herbs in early intervention of children with Henoch-Schonlein purpura nephritis / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the effect of blood activating and cooling, stasis removing herbs on the occurrence rate of Henoch-Schonlein purpura nephritis (HSPN).</p><p><b>METHODS</b>The 141 HSP children patients with bleeding of the blood stasis syndrome and of the blood heat syndrome (having normal results of urine routines) were assigned to the blood activating and stasis removing group and the blood cooling and arresting group. They were treated with blood activating and stasis removing herbs and blood cooling and arresting herbs respectively for eight weeks. The occurrence rate and time of the renal injury, changes of transforming growth factor (TGF), D-dimer (D-D), immunoglobulin (Ig), urine micro-protein, and urease before and after treatment were observed.</p><p><b>RESULTS</b>The occurrence of the renal injury in the blood activating and stasis removing group was 36.2%, obviously lower than that in the blood cooling and arresting group (69.4%). The occurrence time of the renal injury was 32.2 +/- 10.6 days, obviously later than that in the blood cooling and arresting group (20.0 +/- 9.0 days), showing statistical difference (P<0.05). The levels of TGF, D-D, IgA, microglobulin (MG), immunoglobulin G (IgG), albuminuria (ALB) of children patients in the blood activating and stasis removing group were lower after treatment than before treatment, showing significant difference (P<0.05). Significant difference was also shown when compared with those of the blood cooling and arresting group (P<0.05).</p><p><b>CONCLUSION</b>The application of activating blood and removing stasis method could lower the probability of the renal injury in Henoch-Schonlein purpura (HSP). It played a role in preventing the occurrence of HSPN.</p>

Current state of clinical diagnosis and treatment of infantile cytomegaloviral hepatitis / 中国结合医学杂志

Cytomegaloviral hepatitis is an infantile liver disease commonly encountered in China, which could be differentiated into 4 patterns with different clinical conditions. Along with the progress of laboratory diagnostic techniques, multiple diagnostic approaches are available for this disease, but accurate diagnosis can only be made when individual patients' realities are taken into consideration. Clinical treatments are various, and the Western medicine used is mainly anti-viral agents such as Ganciclovir, and so far no unified therapeutic program has been formed. More and more ways of regarding Chinese medicine treatment of cytomegaloviral hepatitis have been published increasingly in recent years, though further research to seek preferable treatment programs is still expected.

Clinically controlled study on children's infectious mononucleosis treated by Chinese medicine / 中国结合医学杂志

<p><b>OBJECTIVE</b>To evaluate the clinical efficacy and safety of Chinese drugs for the treatment of children's infectious mononucleosis (CIM).</p><p><b>METHODS</b>Sixty CIM patients were assigned into the treated group and the control group, patients in the treated group were administered with Chinese herbal decoction, and those in the control group were treated with intravenous dripping of ganciclovir 10 mg/kg per day, for a treatment course of 14 days.</p><p><b>RESULTS</b>The total effective rate was 96.0% in the treated group and 97.1% in the control group, showing insignificant difference between groups. The efficacy in the treated group was superior to that in the control group on the fever clearance time (3.0+/-1.5 days vs 4.9+/-3.9 days ) and the disappearance time of cervical lymph node swelling (0.8+/-1.0 score vs 1.5+/-1.2 score), showing statistical significance (all P<0.05). T-cell subsets were markedly improved in both groups after treatment. Adverse reaction occurred in four cases of the control group.</p><p><b>CONCLUSION</b>Using Chinese herbs for clearing heat, removing toxin, activating blood circulation, and dissolving stasis is effective and safe for the treatment of CIM. It can effectively improve the clinical symptoms and shows a certain effect on immune regulation.</p>

Tracing to the source of staphylococcus aureus isolates from ice cream / 中华预防医学杂志

<p><b>OBJECTIVE</b>To investigate the contamination of Staphylococcus aureus isolates in ice cream by phenotypic typing and molecular typing.</p><p><b>METHODS</b>The Staphylococcus aureus isolates were separated from ice cream, filler, cutter, salves and material. The separated isolates were characterized by drug-resistance, staphylococcal enterotoxin (SEA-E), SE (A-E, G-J) genes and pulsed-field gel electrophoresis (PFGE) types.</p><p><b>RESULT</b>Two Staphylococcus aureus isolates were separated, one from ice cream, another from cutter. Their characteristics of drug-resistance, staphylococcal enterotoxin (SEA-E), SE (A-E,G-J) genes and PFGE type were the same.</p><p><b>CONCLUSION</b>The two Staphylococcus aureus isolates were the same clone. The contaminated Staphylococcus aureus isolates could be traced to the contaminated cutters.</p>

Research on Expression of the Tervalent Fusion Toxin Gene of Vibrio and Establishment of ELISA for Detection / 中国生物工程杂志

To obtain the tervalent fusion toxin gene (named FT),three toxin gene fragments from three species of Vibrio parahaemolyticus,Vibrio vulnificus and Vibrio mimicus were connected with the flexible linker (GGGGS) using overla Pextension PCR. The three toxin gene fragments respectively encode the mature proteins of the thermostable direct hemolysin (TDH) of V. parahaemolyticus,the cytotoxin (VVC) of V. vulnificus and the heat-labile hemolysin (VMH) of V. mimicus. The identity of FT nucleic acid sequence was 99.6% with the corresponding toxin gene fragments. The open reading frame of FT was 3225 bp,encoding 1074 amino acid residues with the predicted molecular weight (MW) of 120.4 kDa. Then,FT was subcloned into the expression vector pET-22b(+). The construction of recombinant expression vector pET-22b-FT was followed by transforming into E. coli BL21(DE3) for expression. The SDS-PAGE electrophoresis results indicated that the MW of the fusion toxin protein was matched to the predicted MW. After induction by 1 mmol/L IPTG at 37℃,the fusion toxin protein was effectively expressed in E. coli BL21(DE3) with the amount of 11.49% through thin layer chromatography scanning (TLCS) analysis. Cavia cobaya was immunized using the purified cytorrhyctes to produce the anti-serum. Through the determination of the optimum working conditions,the sensitivity test,the specificity test,repeatability test and sample simulation test,the indirect ELISA method was established,which is a broad-spectrum,rapid and specific to detect various of food-poisoning Vibrio simultaneously.

Effects of low-dose radiation on tumor growth, erythrocyte immune function and SOD activity in tumor-bearing mice / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Activating on mammalian and human body LDR is thought to induce adaptive response, enhance immune function and increase anti-tumor ability. This study was designed to assess the effect of low-dose radiation on tumor growth and on erythrocyte immune function and superoxide dismutase (SOD) activity in tumor-bearing mice.</p><p><b>METHODS</b>Male Kunming mice were subcutaneously implanted with S180 sarcoma cells in the right inguen to create an experimental in situ animal model. Six hours before implantation, the mice were given 75 mGy X-ray radiation, over the body. Tumor size was observed 5 days later while tumor volume was calculated every other day, allowing for the creation of a graph depicting tumor growth. Fifteen days after implantation, the mice were killed to measure tumor weight and observe the necrotic areas and the location of tumor-infiltrating lymphocytes (TILs). Erythrocyte immune function and SOD activity were also determined.</p><p><b>RESULTS</b>Mice pre-exposed to low-dose radiation had a lower tumor formation rate than did those receiving no radiation (P < 0.05). Tumor growth was significantly lower in the mice pre-exposed to low-dose radiation; after 15 days, the average tumor weight in the mice pre-exposed to low-dose radiation was also lower (P < 0.05). Areas of tumor necrosis and infiltration of TILs were larger in the low-dose radiation group than in the non-radiation group. Erythrocyte immune function and SOD activity were higher in the low-dose radiation group than in the non-radiation group (P < 0.05).</p><p><b>CONCLUSION</b>Low-dose radiation can markedly increase the anti-tumor ability of an organism and improve erythrocyte immune function and red blood cell SOD activity as well, suggesting that low-dose radiation might be useful in the clinical treatment of cancer.</p>

Study on prognosis of 96 cases of children with juvenile rheumatoid a rthritis / 实用儿科临床杂志

Objective To investigate the long-term prognosis an d recorery of children with juvenile rheumatoid arthritis(JRA).Methods The cases diagnosed JRA in our hospital over the period of 1988～1992 we re followed up for the conditions of disease,the deteriorated joints,the treatme nt and the living conditions of patients.Results Ninty-six ca ses were followed up(involving male 66 cases,female 29 cases,the mean age of on set 8.21?3.17 years )except for a case who died of lymphoma.There were 44 cases with systemic JRA ,2 cases of them died after 7-years onset and 23 cases developed severe destructive arthritis.There were 38 oligoarthritis cases,27 cases of them stiu had active disease during 10-year following-up and 9 cases were diagnosed sacroiliitis.There were 13 polyarthritis and 3 cases of them were RF positive, who had developed severe destructive arthritis.Conclusions The prognosis of juvenile rheumatoid arthritis is not desirable,especially in systemic JRA,whose prognostic factors are related to age of onset,the lasting of fever,the markers of phlegmasia activity and the condition of systemic involvement and treatment.Oligoarthritis about 30 % may develop into ankylosing spondylitis.The probability of destructive arthritis is hi gher in polyarthritis with more RF positive and poor prognosis.