Zika virus can cross biological barriers to infect the nervous system,causing serious public health issues. As a key regulator of nervous system development,cerebellin(Cbln)family may have an interrelationship of interference and regulation with Zika virus. Due to the pathogenic characteristics of Zika virus,the functional characteristics of Cbln family and its effect in the nervous system,Cbln family is expected to become an important molecular marker and therapeutic target after Zika virus infection. This paper reviews the potential pathogenic and immunological relationships between Zika virus and Cbln family,and explores the important role of Cbln in maintaining nervous system function and ensuring biosecurity

OBJECTIVE:To study on the effect of iodine (I2) on the acid content titration in the preparations,and establish a method of eliminating I2 for accurate determination of total acid content. METHODS:Taking an example of Onychomycosis paint,I2 was reduced by sodium sulfide(Na2S)before titration analysis and compared with the standard method of traditional titration. Ac-cording to the two methods of consumption of different sodium hydrate(NaOH)volume,the effect of I2 on the determination of to-tal acid content in preparation was explored. RESULTS:Reduction method of Na2S can eliminate the effect of I2,the color of indica-tor changed acutely. The determined total acid and theoretical values were the same;the linear range of the concentration of total ac-id in onychomycosis paint was 3.926-7.290 mol/ml(r=0.9999);RSDs of precision,stability and reproducibility tests were no more than 0.04%;average recovery was 99.91%-100.10%(RSD=0.036%,n=6). CONCLUSIONS:I2 has effect on the determina-tion of total acid content,the disproportion reaction of I2 can generate hydriodic acid that can interfere acid-base titration's results, and the generated hydriodic acid can oxidize indicator to make the end point is not sensitive or even invariant color. Using Na2S can eliminate the effect of iodine on the preparation of acid titration,which has improved precision and reproducibility with accurate and reliable determination results.

Objective To investigate the detection mode for those unpaid blood donors screening as positive HBsAg+ and/or positive anti-HCV could be permitted to recall again for re-detection under the regulation condition in order to determine whether or not regain their qualifications of donating blood and rejoin the blood donation again.Methods The unpaid blood donors preliminari-ly screening as positive HBsAg and/or positive anti-HCV in Shenzhen from Otcober 2007 to December 2013 and conforming to the rules for recalling to re-detection formulated by our center were analyzed and researched for conducting the feasibility discussion on the rejoin mode of unpaid blood donors.Results A total of 415 759 case-times of blood donation were conducted during 2007 ~2013.Among them,2 506 cases(0.60%)and 1 357 cases(0.33%)were screened as positive HBsAg or positive anti-HCV,respec-tively.The recall process of rejoin re-detection was initiated in 59 positive HBsAg donors and 16 positive anti-HCV donors with many times of blood donation.But only 31 positive HBsAg donors and 9 positive anti-HCV donors successfully completed the detec-tion items of re-detection process.Among them 29 positive HBsAg donor regained the qualifications of donating blood and 2 cases were shielded for the blood donation qualification due to unqualification in the following detection.All of the 9 recalled donators with positive anti-HCV regained the blood donation qualification.Conclusion Under present detection mode,the detection tech-nique of blood screening is hard to avoid the occurrence of false positive results caused by the reagents,instruments and personnel operating.In order to protect the donation qualifications of the unpaid blood donators,a set of scientific,reasonable and practical re-detection mode for rejoin of the blood donators should be established for protecting the limited blood donation resource.

Objective To observe the effect of resveratrol on the apoptosis and expressions of bal-2 and bax protein in articular chondrecytes of rabbits experimental osteoarthritis (OA) model,and further explore the mechanisms of resveratrol in the treatment of OA.Methods Thirty Newzealand rabbits were randomly divided into 5 groups：group A (normal control group),group B (model control group),group C (resveratrol intervention high dosage group),group D(resveratrol intervention middle dosage group),group E (resveratrel intervention low dosage group).The model of OA was established with Hulth's modeling method in group B,C,D,E.Four weeks later,groups A and B received intragastric administration of distilled water containing 0.1% DMSO daily and group C,D,E received intragastric administration of resveratrol solution daily (concentration was 60 mg/ml) in different dosages for 6 weeks.Daily dosages of group C,D,E were 120,60,30 mg·kg-1·d-1,respectively.Then the rabbits were sacrificed and the cartilage sections of right femoral medial condyle were analyzed by immunohistochemistry for bcl-2 and bax,TUNEL for apoptosis.Results ① The apoptosis rates of chondrocytes in group B,C,D,E were significantly higher than those in group A (P＜0.01).The apoptosis rates of chandrocytes in group C,D,E were decreased compared with those in group B (P＜0.05).②The positive rates of bcl-2 and bax expression in chondrocytes in group B were significantly higher than those in group A (P＜0.01),but the ratio of the positive rate of bcl-2 expression to that of bax in group B was lower than that in group A (P＜0.01).The positive rates of bcl-2 expression in chondrocytes in group C,D,E were much higher compared with those in group B (P＜0.01).The positive rotes of bax expression in chondrocytes in group C,D,E were lower compared with those in group B (P＜0.01).The ratio of the positive rate of bcl-2 expression to that of bax was increased in group C,D,E compared with group B (P＜0.01).Conclusion Resveratrol can suppress the excessive apoptosis of chondrocytes in experimental OA by up-regulating the expression of bcl-2 while down-regulating the expression of bax and improving the ratio of bcl-2 to bax .Suppressing the excessive apoptosis of chondrocytes in experimental OA may be one of the mechanisms for resveratroi's effect in the treatment of osteoarthritis.

Objective To examine the 5-year incidence of tuberculosis in different populations with strongly positive tuberculin skin test (TST) receiving preventive administration of isoniazide.Methods A total of 12 598 subjects including 8 896 college students,2 496 migrant workers and 1 206 close contacts with active pulmonary were selected from January to December 2003.Subjects with strongly positive TST but without abnormal lung findings were divided into isoniazide group (given isoniazide for 10 months) and control group (not given any drugs).The incidence of tuberculosis in year 2-5 were observed and compared usingx2 test.Results Among 12 598 subjects,897(7.12％) had strongly positive TST,including 316 college students,388 migrant workers and 193 close contacts,and the TST strongly positive rates were 3.55％ (316/8 896),15.54％ (388/2 496) and 16.00％ (193/1 206),respectively.Migrant workers and close contacts had higher TST positive rates than college students (x2 =483.51 and 344.11,P ＜ 0.01).Among 897 TST-positive individuals,37 were diagnosed as tuberculosis,including 11 college students,12 migrant workers and 14 close contacts,and the tuberculosis rates in three populations were 0.12％ (11/8 896),0.48％ (12/2 496) and 1.16％ (14/1 206),respectively.Migrant workers and close contacts also had higher tuberculosis rates than college students (x2 =12.34 and 42.18,P ＜0.01).In the second follow-up year,9 out of 429 subjects in isoniazide group quit the study due to adverse reactions,and in the rest 420 subjects,9 (2.14％) were diagnosed as tuberculosis.The incidence of tuberculosis in three populations were 1.34％ (2/149),1.60％ (3/188) and 4.82％ (4/83),and no significant difference was found (x2 =2.92,P ＞ 0.05).While in the control group,31 out of 429 (7.23％) individuals were diagnosed as tuberculosis,and the incidence was higher than that in isoniazide group (x2 =12.69,P ＜ 0.01).During the next three follow-up years,23 individuals in isoniazide group drop out of the study,and in the rest 388 subjects,8 (2.06％) were diagnosed as tuberculosis.The incidence of tuberculosis in three populations were 1.41％ (2/142),2.35％ (4/170) and 2.63％ (2/76),and no significant difference was found (x2 =3.11,P ＞ 0.05).While in the control group,17 out of 398 (4.27％) subjects were diagnosed as tuberculosis,and the incidence was not of significant difference compared with that in isoniazide group (x2 =2.47,P ＞ 0.05).Conclusion Migrant workers and close contacts are high risk populations of tuberculosis,and preventive administration of isoniazid for 10 months may reduce the incidence of tuberculosis in the following 2 years.

Objective To study the relationship between the cognitive function and speech recognition ability in young patients with OSAHS.Methods We selected 60 young male patients,according to the apnea-hypopnea index(AHI)and the severity of hypoxemia.They were divided into three subgroups on the basis of their syndrome severities:mild group (n= 19;AHI 5~15/h,85%≤minimum SaO2≤90%),moderate group (n= 20;AHI>15~30/h,80%≤minimum SaO2<85%),and severe group (n= 21;AHI>30/h,minimum SaO2<80%).First,we used the MoCA scale for cognitive function tests and recorded the scores.Then 15 lists of sentence Mandarin Speech Test Materials(MSTMs)were utilized to test each group.A data analysis was performed using SPSS 17.0 software. Results The total MoCA scores(mild group:27.32±1.16;moderate group:25.85±1.23;severe group:24.52± 1.69;control group:28.52 ±1.16)decreased progressively as the disease severity increased,showing significant differences between the control group and the mild,moderate and severe groups of OSAHS patients (allP<0.05). When sound stimuli were presented at 22,24,and 26 dB SPL,the speech recognition rates in the patients with se-vere(35.4±22.6,56.3±23.9,75.2±16.5)lower than the other groups (mild group:38.4±23.5,58.3±25.5,79.2 ±18.5;moderate group:38.8±21.6,58.7±22.7,78.5±16.7;control group:39.4±23.5,60.3±24.3,80.2±16.4, respectively,allP<0.05).The differences in intensity of 50% recognition rate between the severe group(4.15± 0.80)and the control(3.62±0.41),mild (3.66±0.50)and moderate groups(3.72±0.55)of OSAHS patients were statistically significant(allP<0.05).Conclusion With hypoxia and disease severity increased,speech recogni-tion abilities in OSAHS patients decreased.This may be an important factor associated with cognitive assessment scale score.

Objective To explore the efficacy and safety of intravenous immunoglobulin and glucocorticoid treatment in elderly dermatomyositis patients. Methods Sixty elderly patients with dermatomyositis were randomly divided into two groups: prednisone alone (n= 30, PA) (first 1 mg per kilogram of body weight daily,then decrease the dose according to disease activity), and the combined treatment (n=30,CT,first 1 mg per kilogram of body weight daily, then decrease the dose according to disease activity, and intravenous immunoglobulin 0. 4 g per kilogram of body weight per month for three months). The improvement of clinical symptoms and the occurrence of side effects were observed at the end of month 3. Results The time of muscle strength recovery, remittences of myasthenia and myalgia visual analogue scale(VAS), the decreasing rates of creatine phospho kinase (CPK) level and the dose of prednisone at the end of month 3 were superior in CT group versus PA group (P<0. 05), while no significant differences in the improvement of rash, muscle strength,erythrocyte sedimentation rate(ESR),C-reactive protein (CRP) and side effects between two groups.Conclusions Combination with intravenous immunoglobulin and oral glucocorticoid is a safe and effective treatment for elderly patients with dermatomyositis, it can alleviate symptoms quickly,decrease CPK level and prednisone dose significantly.

Objective To investigate the anti-inflammatory effect of Resveratrol on type Ⅱ collagen induced arthritis.Methods Collagen induced arthritis (CIA) animal model was established by subcutaneous injection of type Ⅱ collagen emulsified with incomplete and complete Freud's adjuvant to Wistar rats.Fortytwo rats were successfully induced and randomly divided into 7 groups:the experimental group (A),the leflunomide treatment group (B),the TGP treatment group (C),the methotrexate group (D),the low dose Resveratrol group (E),the medium dose Resveratral group (F) and high dose Resveratrol group (G) and the normal control group (H).Symptoms of arthritis were recorded and selalm levels of the anti-C Ⅱ antibody were detected by ELISA.Results For arthritis index.there was no significant difference between groups E and A,neither between groups C and F.The arthritis index was lower in group G than group C,but both of them were higher than groups B and D.② For serum anti-C Ⅱ antibody level,that of group A was higher than groups B,C,D,F and G.There was no difference between groups A and E,and groups C and F.That of Group G was lower than groups C and E.Conclusion High and medium dose of Resveratrol can relieve foot joints swelling in the CIA rats,but low dose does not have similar effect.The effect of medium dose of Resveratrol iS similar to TGP,but weaker than that of leflunomide.Resveratrol may conduct its anti-inflammatory effect via lowering the concentration of the anti-C Ⅱ antibody in the serum.

Objective To investigate the relationship between plasma homocysteine (Hey) level and ankylosing spondylitis (AS).To analyze the association between the NS,N10 methylenetetrahydrofolate reductase (MTFHR) gene polymorphism and AS.Methods One hundred patients with AS and 60 healthy controls were included in the study.The plasma Hey level was examined by enzyme-linked immunoadsorbent assay and MTHFR gene polymorphism was analyzed by the polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP).Results Compared with heahhy controls,the plasma Hey level in AS patients was significantly higher than that of the controls (P＜0.01).There was no significant difference in the frequen-cies of MTHFR genotype and alleles between AS and the controls (P＞0.05),But the ratio of T/T genotype mutation was different between AS and the controls (P＜0.05).The plasma Hey level of T/T genotype was significantly higher than that of C/T or C/C genotype in AS and the controls (P＜0.01).Logisticalregression analysis indicated that Hey was an independent risk factor for AS (P＜0.01,0R=4.582,95%CI=1.984～10.585).Conclusion The plasma homocysteine level is significantly increased in AS patients.Hyperhomo-cysteinemia is an independent risk factor for AS.MTHFR T/T genotype mutation is an important mechanism of hyperhomocysteinemia and may be related with AS.

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