The producing condition and properties of chitinase secreted by Nomuraea rileyi strain CQ031021 were studied.The optimal conditions for the strain to produce chitinase are 6 days of 28℃ with the initial pH 6.0,and the liquid medium containing 2.0% glucose as its carbon source and 0.6% peptone plus 0.6% beef extract as nitrogen source after inoculating dosage 2mL suspension of conidia(1?107/mL).The optimal temperature and pH for enzyme activity is 50℃ and 6.0,respectively,while the activity can be enhanced by Tween-80 and inhibited by SDS.The enzyme activity is stable under 40℃ and in pH range of 5.5～6.5.

Objective To compare the clinical effects and side events between simple synchronal radiochemotherapy(group A) and cervical local implantation chemotherapy combined with synchronal radiochemotherapy(group B) in advanced cervical cancer.Methods Sixty patients with primary cervical cancer,admitted to our hospital from January 2009 to December 2009,were enrolled into the study.The clinical staging of these patients ranged from Ⅱb to Ⅲb.The patients were randomly divided into two different therapy groups.In group A,patients received external irradiation by X-rays and intracavitary by 192 Ir and PT chemotherapy(n=30).In group B,patients received cervical local implantation of fluorouracil palliative 400-500 mg in addition of external irradiation by X-rays and intracavitary by 192 Ir and PT chemotherapy(n=30).The short-term effect and complications were compared between the two groups.Results The effective rate of group A was significantly higher than the second group(97% vs.80%,x2=4.706,P＜ 0.05).The most common complication was myelosuppression.In group A we observed 8 cases had grade Ⅰ,10 cases had grade II,9 cases had grade Ⅲ,3 cases had grade Ⅳ myelosuppression.In group B we observed 8 cases had grade Ⅰ,12 cases had grade Ⅱ,7 cases had grade Ⅲ,3 cases had grade Ⅳ myelosuppression.There were no significantly differences in the comparisons of this complication between the two groups(x2=0.432,P＞0.05).Conclusion The cervical local implantation chemotherapy combined with synchronal radiochemotherapy might improve the prognosis in advanced cervical cancer patients without increasing toxic side effects.

ObjectiveTo investigate the feasibility and importance of the application of simulation ward in medical practice between classes.MethodsTo divide the interns into two groups:the experimental group of 30 and the control group of 30. Both groups apply the simulation ward to practice between classes and both are assessed at the end of the practice.ResultsTo compare the final score of the experimental group and the control group,and significant differences are found in the following aspects:humanistic care,history taking,physical examination,medical record analysis,the theoretical knowledge examinations with the data of P ＜0.05.ConclusionThe application of simulation ward in medical practice between classes can improve the quality of clinical teaching.

AIM:To generate monoclonal antibodies against human augmenter of liver regeneration (rhALR). METHODS:After BALB/C mice were immunized by the purified rhALR, the cells of spleen were fused with the cells of SP2/0; The titer and speciality were respectively fathomed from ascites or foster fluid by ELISA and Western-blot test. RESULTS:2 hybridoma cell lines were successfully obtained. The McAbs titer from ascites and foster fluid are respectively about 10-3-10-5 and 10-2-10-3. It is evident that the two McAbs were directed at different epitopes. CONCLUSIONS:The McAbs have higher speciality. It is significantly useful of the value that how hALR distribute in tissue organs, how the hALR signals the metabolism in the body and the control distribution of the hALR on cell growth on the translational level and so on is researched.

Background Chronic intermittent hypoxia (CIH) has been associated with abnormalities in the liver,which is the most important organ for drug metabolism.This study aimed to investigate the effect of CIH on theophylline metabolism in mouse liver.Methods Eight C57BL/6J mice were exposed to CIH for 12 weeks.Eight C57BL/6J mice were exposed to room air as a control group.Serum levels of alanine aminotransferase and aspartate aminotransferase were measured.Liver histology was observed by light and electron microscopy.Total hepatic cytochrome P450 concentration was measured.Hepatocytes were isolated and incubated with 15 mg/ml theophylline for four hours.After incubation,the theophylline concentration in the supernatant was measured and the theophylline metabolism rate was calculated.Results CIH did not affect the serum transaminase levels.Livers from mice exposed to CIH showed hepatocellular edema,and liver cells had fuzzy rough endoplasmic reticulum under the electron microscope.The theophylline metabolism rate was significantly inhibited by CIH compared with controls; (16.60±2.43)％ vs.(21.58±4.52)％ (P=0.02).The total liver cytochrome P450 concentration in the CIH group was significantly lower than in the control group;(0.83±0.08) vs.(1.13±0.21) mol/mg microsomal protein (P=0.004).Conclusion CIH decreases theophylline metabolism by mouse hepatocytes,which may correlate with the downregulation of cytochrome P450 expression by CIH.

Objective：This study was designed to evaluate the genetic stability on chromosome 16q22 24 in primary nasopharyngeal carcinoma. Methods: Tissue samples from fifty patients with nasopharyngeal carcinoma (NPC) tumors were examined by loss of heterozygosity (LOH) and microsatellite instability (MSI) analysis with a panel of 8 microsatellite polymorphic markers distributed along the chromosome 16q22 24. Results: LOH was observed at one or more loci in 24 cases (48％ ) and the prevalence of MSI was detected in 9 cases (18％ ). But the genomic alterations scattered along the region, neither common deletion or instability region was found. Conclusions: The status of genetic stability in chromosome 16q22 24 suggests that the genomic alterations on chromosome 16q22 24 may be involved in the development of NPC.

This study aims to analyze the molecular epidemiological characteristics of HIV-1 strains prevailing among men who have sex with men (MSM) in Beijing, China. The pol gene fragments from 250 newly diagnosed HIV-1-infected MSM individuals during 2006-2010 in Beijing were amplified by RT-nested PCR, sequenced, and phylogenetically analyzed. HIV-1 pol gene from 189 individuals were amplified and analyzed; 81 (42. 9%), 3 (1. 6%), 2 (1.0%), 88 (46. 6%), and 15 (7.9%) individuals were infected with HIV-1 subtypes B, B', C, CRF01_AE, and CRF07_BC, respectively. The subtypes B and CRF01_AE could both be grouped into two clusters, and CRFO7_BC strains shared high homology and were presumed to originate from a common ancestor. The HIV-1 circulating in MSM in Beijing had a lower genetic diversity than in heterosexuals. The HIV-1 epidemic (2006-2010) in MSM in Beijing was actually a rapid spread of HIV-1 CRF01 AE and B, or rather native strains of the two viruses.
Adult ; China ; epidemiology ; Epidemics ; Genetic Variation ; HIV Infections ; diagnosis ; epidemiology ; virology ; HIV-1 ; classification ; genetics ; isolation & purification ; Homosexuality, Male ; statistics & numerical data ; Humans ; Male ; Middle Aged ; Molecular Epidemiology ; Molecular Sequence Data ; Phylogeny ; Young Adult

OBJECTIVETo discuss the mechanism of the traditional Chinese medicine Keyouling oral liquid in the treatment of condyloma acuminatum(CA) and the adjustment of cellular immunity function.

METHODSThe IL-18 and TNF-alpha levels of peripheral serum and wart tissue of patterned rats and CA patients exposed to Keyouling were determined by means of double-antibody sandwich ELISA, and the NK cellular activity of the spleen of the patterned rats and that of the peripheral blood of the CA patients exposed to Keyouling were determined by means of 3H-TdR isotype release.

RESULTSThe IL-18 and TNF-alpha levels, the NK cellular activity of the high-dosage group showed significant difference from those of the pattern group and low-dosage group in animal experiment(P < 0.05); the IL-18 and TNF-alpha levels of peripheral serum and wart tissues, and the NK cellular activity of the peripheral blood of the treatment group showed significant difference from those of the control group after treatment(P < 0.01, P < 0.05).

CONCLUSIONSKeyouling oral liquid has significant positive adjusting effect, which can markedly ameliorate the cellular immunadeficiency of the patterned animals and reinforce the cellular immunocompetence of CA patients.

Adolescent ; Adult ; Animals ; Condylomata Acuminata ; drug therapy ; immunology ; Female ; Humans ; Interleukin-18 ; blood ; Killer Cells, Natural ; drug effects ; immunology ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Rats ; Rats, Sprague-Dawley ; Tumor Necrosis Factor-alpha ; analysis

Objectives To explore the effect and mechanism of saikosaponin D on cellular autophagy of ICCs by regulating the CaMKKβ/AMPK signaling pathway.Methods Rat primary ICCs cells were isolated and stimulated with glutamate to construct an autophagy model.The Ca2+level was detected by immunofluorescence.Primary ICCs cells were divided into control group,model group,model+saikosaponin D group,model+CaMKKβ inhibitor group,and model+saikosaponin D+CaMKKβ inhibitor group.The ultrastructure of autophagosomes was observed by transmission electron microscopy.The levels of Ghrelin and SP were detected by ELISA.The expressions of Ca2+and LC-3Ⅱ were detected by immunofluorescence.The protein expression levels of LC-3Ⅱ/Ⅰ、CaMKKβ,p-AMPK,Drp1,MFN2,IP3R and RyR were detected by Western blot.Results The fluorescence expression of LC-3Ⅱ was enhanced.Saikosaponin D reduced the levels of CaMKKβ,AMPK and MFN2(P<0.01),and increased the levels of LC-3Ⅱ/Ⅰ、IP3R,RyR,Drp1,Ghrelin and SP(P<0.01).The effect of Saikosaponin D combined with CaMKKβ inhibitor STO-609 was more significant.Conclusion Saikosaponin D can mediate Ca2+outflow through the CaMKKβ/AMPK signaling pathway,and affect the expression of excessive autophagy and gastrointestinal motility-related factors in ICCs cells.

BACKGROUNDChronic intermittent hypoxia (CIH) has been associated with abnormalities in the liver, which is the most important organ for drug metabolism. This study aimed to investigate the effect of CIH on theophylline metabolism in mouse liver.

METHODSEight C57BL/6J mice were exposed to CIH for 12 weeks. Eight C57BL/6J mice were exposed to room air as a control group. Serum levels of alanine aminotransferase and aspartate aminotransferase were measured. Liver histology was observed by light and electron microscopy. Total hepatic cytochrome P450 concentration was measured. Hepatocytes were isolated and incubated with 15 mg/ml theophylline for four hours. After incubation, the theophylline concentration in the supernatant was measured and the theophylline metabolism rate was calculated.

RESULTSCIH did not affect the serum transaminase levels. Livers from mice exposed to CIH showed hepatocellular edema, and liver cells had fuzzy rough endoplasmic reticulum under the electron microscope. The theophylline metabolism rate was significantly inhibited by CIH compared with controls; (16.60 ± 2.43)% vs. (21.58 ± 4.52)% (P = 0.02). The total liver cytochrome P450 concentration in the CIH group was significantly lower than in the control group; (0.83 ± 0.08) vs. (1.13 ± 0.21) mol/mg microsomal protein (P = 0.004).

CONCLUSIONCIH decreases theophylline metabolism by mouse hepatocytes, which may correlate with the downregulation of cytochrome P450 expression by CIH.

Animals ; Chronic Disease ; Cytochrome P-450 Enzyme System ; physiology ; Hepatocytes ; metabolism ; Hypoxia ; metabolism ; Liver ; metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Theophylline ; metabolism