Objective To explore the difference of pathogenesis between chronic hepatitis B (CHB) and asymptomatic hepatitis B virus(HBV) carriers(ASCs) in children.Methods Subtracted libraries was constructed by suppression subtractive hybridization (SSH) from peripheral blood mononuclear cell (PBMC) of two groups, beta-2-microglobulin (?_2-MG) was screened as one of differentially expressed genes. Serum was collected from children with CHB and ASCs, the differential expression of ?_2-MG was confirmed by enzyme immunoassay.Results Subtractive libraries were constructed successfully, the differentially expression of ?_2-MG and lactroferrin were up-regulated in CHB children.And the differentially expression of ?_2-MG on the level of protein was confirmed.Conclusion The up-regulation of ?_2-MG in CHB children is involved in the pathogenesis mechanisms.

Objective To discuss the influence of different doses budesonide aerosol inhalation on serum cytokines levels in children with severe asthma.Methods 96 children with severe asthma aged 4 to 14 years old in our hospital were chosen,and they were randomly divided into the observation group and the control group,48 cases in each group.All patients were given conventional treatment, and the control group was given 1mg/time budesonide treatment on the basis of conventional treatment (3 times a day),while the observation group was given 2mg/time budesonide treatment (3 times a day).Before and 1 week after treatment,the clinical symptoms of two groups were observed and compared,as well as the changes of IL-4,IFN-gamma,IL-10 and TNF-α.Results In the obser-vation group,wheezes,coughing,wheezy sound and rales disappearance time were (2.10 ±0.77)d,(5.45 ±1.20)d, (3.46 ±1.03)d,(5.55 ±1.35),which were significantly shorter than (2.98 ±1.02)d,(7.48 ±1.19)d,(5.43 ± 1.06)d,(7.56 ±1.67)d in the control group (t=4.77,8.32,9.23 and 8.32,all P<0.01).4 weeks after treat-ment,the total effective rate of the observation group was 89.6%,which was significantly higher than 72.9% of the control group (χ2 =4.376,P<0.05).After treatment,the IL-4,IL-10,TNF-alpha,IFN-gamma levels in the observation group were (4.06 ±1.77)pg/mL,(12.77 ±2.05)pg/mL,(4.15 ±1.11)ng/mL,(26.23 ±2.78)pg/mL, which had significant changes compared with (9.02 ±2.23)pg/mL,(10.21 ±1.30)ng/mL,(6.66 ±1.62)pg/mL, (17.33 ±2.31)pg/mL before treatment(t=12.07,24.56,16.20,17.25,all P<0.01).After treatment,the IL-4, IL-10,TNF-alpha,IFN-gamma levels in the control group were (9.11 ±2.05)pg/mL,(6.80 ±1.23)ng/mL, (9.88 ±2.20)pg/mL,(21.22 ±2.80)pg/mL,which had significant changes compared with (9.11 ±2.05)pg/mL, (10.38 ±1.37) ng/mL,(6.71 ±1.77) pg/mL,(17.30 ±2.05) pg/mL before treatment( t=5.36,13.47,7.77, 7.83,all P<0.01).But IL-4,TNF-alpha levels in the treatment group were significantly lower than those in the control group (t=7.32,11.08,all P<0.01),while IL-10 and IFN-gamma levels were significantly higher than those in the control group (t=6.65,8.80,all P<0.01).The incidence of adverse reactions of the two groups had no statistically significant difference (χ2 =0.771,P>0.771).Conclusion High doses of budesonide aerosol inhalation in the treatment of children with severe asthma has obvious clinical curative effects,which could significantly improve the patients'clinical symptoms,and also has low incidence of adverse reactions,which is worthy of clinical promotion.

Objective To study the effect of early enteral nutrition(EN) and total parenteral nutrition(TPN) in patients with severe acute pancreatitis by a mata analysis.Methods Randomized controlled trials of TPN and early EN in patients with severe acute pancreatitis were searched in Medline,Pubmed and Embase from Jan 1970 to June 2009,and Cochrane Library(Issue 2,2009).Seven studies were enrolled into the analysis.The detail about the trial design,characters of the subjects and results of the studies were reviewed by two independent authors and analysed by using Revman 5.0.18 software.Results Compared with TPN,early EN was associated with a significantly lower incidence of pancreatic infections(OR =0.38,95% CI :0.18～0.82,P =0.01),organ failure(OR =0.43,95% CI :0.23～0.79,P =0.007),fewer surgical interventions(OR =0.34,95% CI :0.18～0.63,P =0.0006) and mortaily(OR =0.41,95% CI :0.19～0.88,P =0.02).However,there was no significant difference in total infections [ OR =0.43,95% CI(0.17,1.10),P =0.08]between patients with TPN and early EN.Conclusions Early EN could be the preferred nutrition feeding method for patients with severe acute pancreatitis.

Objective To investigate the effect of bifidobacteria on dextran sulphate sodium(DSS)- induced acute ulcerative colitis in mice.Methods Thirty BALB/C mice were randomly divided into nor- mal control group (n=10),0501 strain group (n=10) and c122 strain group (n=10).Fifty BALB/ C mice received 5% dextran sulphate sodium(DSS) for 7 days to induce ulcerative colitis.The mice were then divided to model group,negative control group(perfused with 0.9 NaCl solution ),positive control group(perfused with SASP of 20 mg/ml),DSS + 0501 strain group(perfused with 1?10~9 CFU/ml bifidobacteria 0501 strain solution and DSS + c122 strain group (perfused with 1?10~9 CFU/ml bifidobacteria c122 strain solution).All mice were sacrificed 9 days later.The colon specimens were measure by histoehemical staining with H-E.The expressions of interleukin-10 (IL-10) and its protein were detected by RT-PCR and immunohistochemistry respectively.Results The degree of colon inflam- mation in mice both in DSS+ 0501 strain and DSS+ c122 strain groups were aggravated and expressions of IL-10 mRNA and protein were reduced compared to model group.No colon inflammation was found in 0501 strain and c122 strain groups.Conclusion Some strain of bifidobaeteria may aggravate colon in- flammation in mice when mucosal harrier is destroyed.

Objective: To investigate the alteration of bcl- 2 gene family in the rat brain and the molecular mechanism of neuronal apoptosis following traumatic brain injury. Methods: Male Sprague -Dawley rats were subjected to lateral fluid percussion brain injury(FPI) of mo derate severity. Bcl-2, Bcl-x and Bax protein expression was detected by immun ohistochemistry. Results: (1) The immunoreactivity of Bcl-2 and Bcl-x protein decreased in the hippocampus ipsilateral impact site as early as 6 h post-injury, and this was the main cause of down-regulation of the ratio of Bcl-2+Bcl-x to Bax. (2) During 1-3 d after injury, the Bax protein express i on increased significantly, while the Bcl-2 and Bcl-x protein expression decre ased relatively slow. The decreased ratio of Bcl-2+Bcl-x to Bax was mainly due to the Bax up-regulation. Conclusion: The bcl-2 gene family is involved in neuronal apoptosis after FBI, and the protein expression alteration of the family members leads the neuronal cell to apoptosis.

Acute Disease ; Adolescent ; Asthma ; immunology ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Male ; RNA, Viral ; genetics ; Respiratory Syncytial Viruses ; genetics ; Respiratory Tract Infections ; immunology ; virology ; Reverse Transcriptase Polymerase Chain Reaction

Objective: To investigate the alterations of bcl-2 gene family in the rat brain and the molecular mechanism of neuronal apoptosis follow ing traumatic brain injury (TBI). Methods: Male Sprague-Dawley rats were subjected to lateral fluid percussion brain injury(FPBI) of moderate severity. bax and bcl-xL mRNA and protein expression was detected by RT-PCR an d immunohistochemistry. In addition to morphological evidence of apoptosis, TUNE L histochemistry was used to identify DNA fragmentation in situ under both l ight and electron microscope, whereas characteristic internucleosomal DN A fragm entation of apoptosis was demonstrated by DNA gel electrophoresis. Resul ts: bcl-xL mRNA and protein decreased in the ipsilateral hemisphere t o the impact site as early as 6 h post-injury［(67.42±7.54)% and (85.85±5.72)% r espectively］. The decrease in bcl-xL mRNA and protein preceded apoptosis was observed 12 h post-injury. And this was the main cause of up-regulation of the ratio of bax to bcl-xL in the acute period(minutes-hours) followin g FPBI. bax mRNA and protein were observed to rise slowly, doubled 3 d post- injury, returned to sham level slowly. The delayed cell death (days-weeks) migh t associated with the up-regulation of pro-apoptotic gene bax. Conclusio n: The expression of bcl-xL and bax coincide with apoptosis following TBI. The reg ulation of bax and bcl-xL by TBI occur before transcription. The balance of bax/bcl-xL ratio determines the neurocytes to survive or die following FPBI.

AIM To develop an HPLC method for the simultaneous content determination of five constituents in Chairen Capsules (Bupleuri Radix,Ziziphi spinosae Semen,Chuanxiong Rhizoma,etc.).METHODS The analysis of 80％ methanol extract of this drug was performed on a 30 ℃ thermostatic Merck Purospher STAR C1s column (250 mm × 4.6 mm,5 μm),with the mobile phase comprising of acetonitrile-0.1％ formic acid flowing at 1.0 mL/min in a gradient elution manner,and the detection wavelengths were set at 237,290 and 335 nm.RESULTS Spinosin,ferulic acid,cinnamaldehyde,liquiritin and ammonium glycyrrhizate showed good linear relationships within the ranges of 0.009 26-0.092 6 μg (R2 =0.999 6),0.056 2-0.562 μg (R2 =0.999 8),0.130-1.30 μg (R2 =0.999 8),0.275-2.75 μg (R2 =0.999 5) and 0.568-5.68 μg (R2 =0.999 2),whose average recoveries were 100.73％,100.62％,100.02％,100.41％ and 99.96％ ％ with the RSDs of 2.20％,1.37％,1.52％,1.30％ and 0.80％,respectively.CONCLUSION This simple,accurate and reproducible method can be used for the quality control of Chairen Capsules.

Objective To verify the reference interval for D-dimer assay and analyze the influence of age and gender on the ref-erence interval.Methods Inclusion criteria for reference individuals were established.60 healthy males and 63 females were enrolled and divided to three groups by age,including 20 to 39 years old group (20 males and 20 females),40 to 59 years old group (20 males and 23 females)and above 60 years old group (20 males and 20 females).Blood samples were drawn in cit-rate sodium anticoagulated tubes and D-dimer concentration was determined by three different coagulation analyzers using o-riginal reagents.According to CLSI guideline C-28-A3,the reference interval for each measurement system from reagent manufacturer was verified and the difference of D-dimer concentration between different age-group and sex-group was ana-lyzed using non-parameters tests.Results All reference intervals were verified for people under age 40,while one reference interval cannot be verified for people from 40 to 59 years old as same as one for people above 60 years old.D-dimer concen-tration increased with age and there was significantly different between 20~39 years old group and 40~59 years old group or above 60 years old group(P<0.05).There was only a significant difference between sex-group for people under age 60(P<0.05).Conclusion D-dimer concentration was associated with age and sex.For people under age 40,the reference inter-val from reagent manufacture can be verified and directly used in laboratory,while for people above age 60,the reference in-terval from reagent manufacture cannot be verified.The cause should be investigated and a new reference interval should be established separately when necessary.

Objective To evaluate the radical effect and prognosis of laparoscopic resection for colorectal cancer in China.Methods Articles of non.randomized comparative studies(NRCs)of laparoscopic resection and open Burgery for colorectal cancer which were published before October 2007 were retrieved,and correlated indexeswere extraeted for meta.analysis.Results The mean quality score of the 14 articles selected was 18.92±1.27.The basic characteristics of patients in laparoscopic resection group were similar to those in open surgery group.Compared with open surgery group,the incised length of the intestine in the laparoscopic resection group was shorter by 0.66 cm.and the distance between distal margin of resection and tumor was farther by 0.26 cm.The 2-year survival rate of patients in laparoscopic group Was 1.67 times higher than that of open surgery group.There was no significant difference upon follow-up rate,tumor diameter,number of resected lymph nodes,local recurrence rate and distal metastasis rate between the 2 groups.Conclusions The results of meta-analysis show that laparoscopic resection has the sanle radical effect as open surgery for colorectal cancer.but the 2-year survival rate of patients treated by laparoscopic resection is comparatively higher.