Objective To analyze the mutation of PreS-S region in occult hepatitis B virus(OHBV) in HBV infected persons with positive HBsAb and investigate the biological mechanisms of the special infectious model.Methods A total of 38 HB-sAb positive OBI serum samples were amplified by Nested PCR and sequenced,HBV genotype and serotype were determined.The amino acid sequences of OHBV were compared to the corresponding sequence of wild-type strains of similar genotype obtained from the GenBank database.Results PreS-S segment of 11 samples were obtained and 8 samples were sequenced successfully.Among which,5 were genotype C and 3 were genotype B.Genotype B were all serotype adw,while genotype C were 1 adw and 4 adr.The mutation rates of PreS-S region,the immunoreactive area and the major hydrophilic region (MHR) were higher in OHBV than the wild-type strains (2.6％ vs 0.8％,x2 =40.23,3.2％ vs 0.3％,x2 =52.13,3.6％ vs 0.6％,x2 =13.25,all P＜0.01) and the substitutions of I126T,Q129R,M133T,F134I,D144E,G145K in α determinant were found in OBI samples.The mutation rate of amino acids in PreS-S region was higher in genotype C than genotype B (3.5％ vs 1.2％,x2--15.98,P＜0.01),meanwhile,the mutation rates in MHR,α determinant and immunoreactive region were higher in genotype C too,but no statistical significance was attained (4.7％ vs 1.7 ％,x2 =2.96,3.6 ％ vs 2.9％,x2 =0.25,4.1％ vs 2.3％,x2 =3.59,all P ＞0.05).Conclusion Mutations in PreS-S region,especially in immunoepitope,might change the virus'immunogenicity leading to escape from immune response and cause OBI with HBsAb positive.

OBJECTIVETo investigate the changing laws of serum high mobility group box 1 protein (HMGB1) in septic rats and intervention effect of Xuebijing on it.

METHODSLipopolysaccharide (LPS) (5 mg/kg BW) was intravenously injected into the tail vein of healthy male Wistar rats to prepare the sepsis rat model. In Experiment 1: 50 Wistar rats were randomly divided into three groups, i.e., the normal group (A, n=10); the LPS model group (B, n=10), the LPS +Xuebijing treatment group (C, n=30). Rats in the C group were further divided into three subgroups, i.e., 2 h before LPS injection (group C1), 2 h after LPS injection (group C2), and 8 h after LPS injection (group C3), 10 in each group. Blood samples were collected from the caudal vein to detect serum HMGB1 levels by Western blot at 4, 12, 24, 48, and 72 h after LPS injection. Experiment 2: 30 Wistar rats were equally divided into the LPS model group (D) and the LPS + Xuebijing treatment group (E), 15 in each group. They were treated as rats in the B group and the C1 group respectively. Five rats were sacrificed at 12, 24, and 48 h after LPS injection in the two groups. Blood as well as the tissue samples were harvested to measure such indices as ALT, AST, Cr, and BUN, as well as pathological changes of liver, lung, and kidney.

RESULTS(1) Compared with the A group, serum HMGB1 levels were higher at various time points in the B group (P < 0.05). Compared with the B group, serum HMGB1 levels at 12,24,48, and 72 h decreased in the C1, C2, and C3 groups. Besides, the decrease was more obvious at 24 h and 48 h.The decrement in the C3 group was less than that in the C1 and C2 groups (P < 0.05). (2) In the D group, ALT, AST, Cr, and BUN were significantly higher than those in the A group and reached the peak at 24 h (P < 0.05). Compared with the E group, AST, Cr, and BUN at 24 and 48 h, and ALT at each time point decreased significantly in the E group (P < 0.05). (3)The results of pathological section of liver, lung, and kidney showed local congestion and hemorrhage, cell edema/necrosis/degeneration, infiltration of inflammatory cells, damage of characteristic structures and so on; particularly serious lesion occurred at 24 and 48 h in the D group. The microscopic lesion was obviously alleviated in the E group than in the D group at corresponding time points.

CONCLUSIONSThe serum HMGB1 levels increased in septic rats, with late occurrence of peak value and longer duration of the high value. HMGB1 played an important role in excessive inflammatory response and multiple organ dysfunction. Xuebijing could reduce the serum levels of HMGB1, improve biochemical parameters, and attenuate severe inflammatory response of liver, lung, and kidney tissues in septic rats. Besides, the earlier use, the better effect obtained.

Animals ; Disease Models, Animal ; Drugs, Chinese Herbal ; therapeutic use ; HMGB1 Protein ; blood ; Male ; Rats ; Rats, Wistar ; Sepsis ; blood ; drug therapy

Objective To explore the relationships between the polyrnorphisms of xeroderma pigmentosum A(XPA) and the susceptibility of esophageal cancer (EC),as well as its interaction with environmental factors-gene in Changzhi area,Shanxi province. Methods A case-control study was conducted,including 196 cases of EC and 201 controls.XPA 23G polymorphisms were determined with polymerase chain-restriction on fragment length polymorphism (PCR-RFLP).Results The risk of EC was significantly degraded in the individuals who had been carrying the XPA heterozygote (A/G) and mutation genotype (G/G),compared to those with wild genotype (X2=16.21,P＜0.01) and the ORs were 0.58 (0.37-0.91) and 0.32 (0.18-0.56),respectively.There was negative interaction between XPA 23G mutation genotype and the consumption of pickled food (S=0.04,API=-0.77).Conclusion Genetic polymorphism in the XPA 23G might be associated with esophageal cancer in Changzhi area,and there was a negative action between XPA predisposing genotype and the consumption of pielded food.

OBJECTIVEThe causes of chronic diarrhea in children are complex. At present, food allergy is generally viewed as an important cause of this disorder, and IgG-mediated delayed allergy plays a major role in this process. This study aimed to explore the link between food specific IgG and chronic diarrhea in children, as well as the value of food allergens-specific IgG antibody detection in the management of this disorder.

METHODSEighty-two children with chronic diarrhea and 30 healthy controls were enrolled. Serum levels of specific IgG antibody to 14 kinds of food were detected using ELISA. The results were classified into four grades: Grade 0 (negative), Grade 1 (mild allergy), Grade 2 (moderate allergy) and Grade 3 (severe allergy). The patients received a diet treatment based on the results of food specific IgG antibody detection. Children with negative IgG antibody were allowed to continue their current diet. In children with Grade 1 allergy, the food responsible for the IgG antibody positive test was given only at an interval of four days. In children with Grade 2 or 3, the offending food was eliminated from the diet.

RESULTSOf the 82 children with chronic diarrhea, 79 (96.2%) had increased specific IgG levels for one or more of the 14 foods tested compared to 8 (26.7%) of the controls (P <0.01). The majority of patients showed increased specific IgG levels for milk (68.3%) and egg (62.2%). A low proportion of patients (2.4%) was allergic to chicken, and no patient was allergic to pork. The symptoms were improved in 65 patients (79.3%) after 1 week to 3 months of diet treatment.

CONCLUSIONSFood allergy is one of major causes of chronic childhood diarrhea. Food specific IgG antibody detection may assist in the dietary management of this disorder.

Allergens ; immunology ; Child ; Child, Preschool ; Chronic Disease ; Diarrhea ; etiology ; immunology ; Female ; Food Hypersensitivity ; immunology ; Humans ; Immunoglobulin G ; blood ; Infant ; Male

Objective To study the pathogen and characteristics of viral diarrhea in children in Changchun area.Methods 460 stools specimens were collected from children with acute diarrhea cured in the childrens,hospital of Changchun in 2010.Rotavirus were detected by ELISA,caliceverus and astrovirus were detected by reverse transcription-polymerase chain reactions (RT-PCR),adenovirus were detected by polymerase chain reactions (PCR).Results A total of 460 specimens were detected.The detection rate of rotavirus,caliceverus,astrovious,adenovious respectively is 35.22％,20.43％,9.78％, 3.70％,the detectablerate of mixed infection is 7.61％,children under 2 years old were the major patient.The main genotypes of the virus:rotavirus ( G3P [ 8 ] ),caliceverus ( GⅡ-4 ),astrovious ( typeⅠ ),adenovious ( Ad41 ).Conclusion Rotavirus is the main pathogen in Changchun.Followed by caliceverus,astrovious,adenovious.

BACKGROUNDCardiac resynchronization therapy (CRT) device and coronary sinus (CS) lead extraction are required due to the occurrence of systemic infection, malfunction, or upgrade. Relevant research of CS lead extraction is rare, especially in developing countries because of the high cost and lack of specialized tools. We aimed to evaluate percutaneous extraction of CS leads by modified conventional techniques.

METHODSOf 200 patients referred for lead extraction from January 2007 to June 2011, 24 (12.0%) involved CS leads (24 CS leads). We prospectively analyzed clinical characteristics, optimized extraction techniques and feasibility of extraction.

RESULTSComplete procedural success was achieved in 23 patients (95.8%), and the clinical success in 24 patients (100.0%). The leading indication for CS lead extraction was infection (66.7%). Mean implant duration was (29.5 ± 20.2) months (range, 3 - 78 months). Sixteen CS leads (66.6%) were removed with locking stylets plus manual traction by superior transvenous approach. Mechanical dilatation and counter-traction was required to free fibrotic adhesions and extract 4 CS leads (16.7%), which had longer implant duration than other leads ((62.5 ± 12.3) vs. (22.9 ± 14.1) months, P < 0.05). Another 4 CS (16.7%) leads were removed by modified and innovative snare techniques from femoral vein approach. Median extraction time was 11 minutes (range, 3 - 61 minutes) per CS lead, which had significant correlation with implant duration (r = 0.8, P < 0.001). Sixteen patients (66.6%) were reimplanted with new devices at a median of 7.5 days after extraction. Median followed-up was 23.5 months (range, 8 - 61 months), three patients died due to sudden cardiac death (26 months), heart failure (45 and 57 months, respectively).

CONCLUSIONThe modified procedure was proved to be practical for percutaneous extraction of CS leads, especially in developing countries lacking expensive powered sheaths.

Aged ; Cardiac Resynchronization Therapy Devices ; adverse effects ; Coronary Sinus ; surgery ; Device Removal ; methods ; Electrodes, Implanted ; adverse effects ; Female ; Humans ; Male ; Middle Aged ; Prospective Studies

OBJECTIVESTo investigate the significance of c-fos oncogene morphogenetic protein's locational expression, and the correlativity between nerve transmitters calcitonin gene-related peptide (CGRP) expression and nerve root's functional change using the animal model of the chronic compressive injury in the nerve root.

METHODSThe animal model of chronic compressive injury of the nerve root was established by transplanting autogenous cancellous bone into the intervertebral foramen. During different injury phase (1, 2, 4, 8, 12, 24 weeks after operation), the functional status of the nerve root was determined under the monitoring of evoked potential, and the expression changes of c-fos oncogene morphogenetic protein and nerve transmitter CGRP were detected using in situ hybridization technique and their expression intensity was determined using automatic image analytic instrument respectively.

RESULTSOne week after operation, the c-fos expression strengthened in both anterior and posterior root fiber obviously. Two to four weeks after operation, the expression of the posterior root fiber weakened than the anterior root fiber. After 12 weeks, the anterior root fiber expression turned down obviously, however the posterior root fiber expression backed up slightly compared with that of the 8 weeks. By the time of 24 weeks after operation, the expression enhancement in all roots disappeared. CGRP expression increased obviously at the site of compressive axon of both anterior and posterior root. The expression of the posterior root axon and ganglion cell was higher than that of the anterior root axon. CGRP expression was diminished in the second week than the first week, and that was especially obvious in the posterior root and ganglion cell. But 4 weeks after operation, the expression enhanced once more, and that was more obvious inside the anterior root axon. Eight weeks after operation, the expression intensity attained the high peak. Twelve weeks after operation, the expression started the slow-moving descent.

CONCLUSIONSThe expression of c-fos gene protein is beneficial to localize the damaged part of certain nerve. During chronic injury, the degeneration of posterior root sensory fiber is earlier than the anterior root motor fiber. The expression of CGRP strengthened when the nerve fiber degenerated by the harmful stimulation, and the expression intensity is positively related with pain. That suggests when the nervous tissue is hurt, the information of warning and regulation should be sent out to our body.

Animals ; Calcitonin Gene-Related Peptide ; metabolism ; Cats ; Disease Models, Animal ; Female ; In Situ Hybridization ; Male ; Proto-Oncogene Proteins c-fos ; metabolism ; Radiculopathy ; metabolism ; physiopathology ; Spinal Nerve Roots ; physiopathology

OBJECTIVETo investigate the prevalence of human papillomavirus (HPV) and the HPV genotype distribution in invasive squamous cell carcinoma of the uterine cervix in the Mongolian women in Inner Mongolia autonomy region.

METHODSThe prevalence data of HPV in our department were retrospectively reviewed. INNO-LiPA genotyping technique was used to detect HPV genotypes in the reserved carcinoma tissue specimens.

RESULTSTotally 63 tissue specimens were collected and detected. The prevalence of HPV was 93.7%. The positive rates of HPV among different clinical staging and different pathological grading were not significantly different (P >0.05). The prevalence of HPV16 was not significantly different among different age groups (P>0.05). HPV16 (69.8%), HPV18 (4.8%), HPV31 (4.8%), HPV39 (4.8%), and HPV52 (3.2%) were the 5 dominating HPV genotypes in all cases.

CONCLUSIONSHPV infection is closely correlated with invasive squamous cell carcinoma of the uterine cervix in Mongolia women. HPV16 is the most important genotype in invasive squamous cell carcinoma of the uterine cervix, followed by HPV18, 31, and 39. HPV infection dose not affect the progression and differentiation of invasive squamous cell carcinoma of the uterine cervix.

Adult ; Aged ; Asian Continental Ancestry Group ; Carcinoma, Squamous Cell ; virology ; Female ; Genotype ; Humans ; In Vitro Techniques ; Middle Aged ; Papillomaviridae ; classification ; genetics ; Papillomavirus Infections ; genetics ; virology ; Polymerase Chain Reaction ; Uterine Cervical Neoplasms ; virology

Peroxisome proliferator-activated receptor gamma(PPAR-γ)is a member of the ligand-activated nuclear tran-scription factor superfamily.Activated PPAR-γ is involved in the regulation of many central nervous system(CNS)events,and is involved in cholesterol metabolism by inducing or inhibi-ting a series of gene pathways,thereby inhibiting the deposition of β-amyloid protein(Aβ).It plays an important neuroprotec-tive role in Alzheimer's disease(AD),improves memory and cognition in AD,and is a potential target for AD.Drug develop-ment aimed at restoring cholesterol homeostasis may be a poten-tial strategy to counteract AD.By analyzing the distribution and structure of PPAR-γ,focusing on the biological correlation be-tween PPAR-γ-mediated cholesterol metabolism and AD,this paper describes the mechanism regulation of PPAR-γ on key proteins,genes and their corresponding molecules,providing a new reference for the treatment of AD.

OBJECTIVETo evaluate the early results of precise liver resection.

METHODSBetween May 2006 and June 2009, 65 patients with complicated liver space-occupying lesions were included in the study. Fifty-one patients underwent curative liver resection. Liver resections performed included 16 trisectionectomies, 11 hemihepatectomy, 5 meso hepatectomies, 3 combined segmentectomies, 5 caudate lobectomies and 11 irregular local resections.

RESULTSPatients undergoing resection had no mortality with a major morbidity of 9.8%. Nineteen vascular repairs and reconstructions were patent at last follow-up. The postoperative 1-year survival rate was 100% in 10 patients with benign lesions and 92.7% in 41 patients with malignant tumors. The 1-year survival rate was zero in patients with malignant tumors, who underwent no liver resection.

CONCLUSIONSPrecise liver resection, as an aggressive surgical approach, offers hope for these patients, who would otherwise have a dismal prognosis.

Adult ; Aged ; Female ; Hepatectomy ; methods ; Humans ; Liver ; surgery ; Liver Diseases ; surgery ; Male ; Middle Aged ; Prognosis ; Retrospective Studies