Objective:To explore the influence of chaperone tapasin on HLA E expression on cell surface.Methods:The infection method was used to transfer the recombinant retrovirus expression vector which was constructed with HLA E molecules on target cells was detected with FACS technique.Results:Exogenous HLA E expression on T2 cell surface was detected with 74.13% and no HLA E expression was detected on control cells and that was transfected with empty vector.Conclusion:It is possible that the expression of HLA E molecules on cell surface involves in TAP independent mechanism.

Objective:To construct mammalian cell expression vector of human leukocyte antigen C gene and express it in JAR cell and study its functions.Methods:Total cell RNA was extracted from peripheral blood mononuclear cells and the cDNA was amplified by RT PCR;the cDNA fragments were directly inserted into Pbluescript KS(+/-) and the recombinant PBS HLA C was identified by restriction endonuclease digestion and sequencing;then the plasmid of pcDNA HLA C was transfected into JAR cells.Lactate Dehydrogenase(LDH) release assay was employed to detect the cytotoxicities of NK cells proliferated in vitro against HLA C transfectants JAR cells.Results:The recombinant mammalian cell expression vectors of pcDNA3 HLA C was constructed,the sequences of the insert was identical to the published sequences encoding HLA Cw *0602 gene.Several transfected JAR clones were obtained,which expressed HLA Cw *0602 in high level and constitutively.The specific lysis was detected for NK cells stimulated by IL 2 against JAR cells and HLA C transfectants JAR cells.But both cells were resistant to freshly isolated PBL cells.Conclusion:The recombinant mammalian cell expression vectors of pcDNA3 HLA Cw *0602 was successfully constructed,JAR cells resistance to NK lysis could involve an HLA C independent mechanism.

Objective:To investigate the effects of recombinant human interluekin-1 receptor antogonist (rhIL-1Ra) on the cartilage repair in rat temporomandibular joint(TMJ) with osteoarthritis(OA).Methods:Collagenase-Ⅱ was injected into bilateral TMJs of 24 adult rats for the induction of bilateral TMJOA,1 week after injection,5μg rhIL-1Ra(diluted in 0.05 ml normal saline) was injected into each right TMJ and the left joint received the same amount of normal saline injection as the control.12 animals were sacrificed at 2and 4 weeks after the first injection respectively.HE staining,immunnohistochemical method and RT-PCR examination were conducted.Mankins scere was used to evaluate the TMJOA degree.1 adult SD rat was used as healthy control,and sacrificed at 2 weeks of the experiment.Results:The TMJs of both sides showed typical OA-related cartilage degradation 2 week after IL-1Ra treatment,the Mankin~ score of the IL-1Ra treated and control joints was 1.33±0.52 and 2.00±6.63 (P＞0.05),4 week after treatment that was 3.00± 0.63 and 6.50 ± 0.84 (P＜0.05),respectively.Lower expression of ADAMTS-4 and ADAMTS-5 was observed in the treated joints than in the controls (P＜0.05).Conclusion:Intra-articular injection of IL-1Ra into TMJ can alleviate the cartilage lesion,the mechanism may lie in the inhibition of the expression of ADAMTS-4 and ADAMTS-5.

Objective To investigate serum nesfatin-1 levels in type 2 diabetes (T2DM)patients with or without nonalcohol-ic fatty liver(NAFLD).Methods The hight,weight,serum GLU,lipid profiles,INS,HbA1c,ALT,nesfatin-1 levels were measured in 21 1 T2DM patients[98 without NAFLD(TD2M without NAFLD group)and 1 13 with NAFLD(TD2M with NAFLD group)] and 75 normal subjects(NGT group).BMI、HOMA-IR were also calculated.Results The serum nesfatin-1 level was significantly higher in T2DM group than those in NGT group(P <0.05),and T2DM with NAFLD group had higher nesfatin-1 level than T2DM without NAFLD group (P < 0.05 ).There was a close relation between nefastin-1 of T2DM group and course of disease (r=-0.447,P <0.05).NAFLD existed a significant correlation with BMI、TG and nesfatin-1 (P <0.05).Conclusion nesfatin-1 may partially contribute to the pathogenesis of T2DM and NAFLD.

Objective:To investigate the mechanism of association between Pregnancy induced Hypertension and HLA G.Methods:The distribution and frequencies of HLA G alleles were analyzed in 54 PIH patients and 146 random healthy controls with nonradioactive digoxigenin labeled PCR SSO method.Results:The results showed that the same nine HLA G alleles were detected and the G*01011 was the commonest allele with the frequency of 31.38% and 37.33% respectively in both PIH and controls groups,the next was G*01013,25.00% and 20.21% separately.Statistic analysis showed that the frequencies of HLA G alleles were similar to in the two groups and there was no significant difference between PIH patients and controls.Conclusion:These data suggest that there is no significant detectable relation between the HLA G polymorphism and PIH.

PurposeTo study the changes of serum nitric oxide(NO)and endothelin(ET)levels by L-Arg therapy in acute hypoxic model. MethodsNADPH diaphorase histochemical staining method, Griess biochemical assay and radioimmune assay were applied to investigate the changes of nitric oxide synthase (NOS) ,NO, cGMP and ET in normal, hypoxic and L-Arg treated hypoxic rats. Resultsduring acute hypoxia, while serum ET rose up significantly, both the levels of serum NO and cGMP and the activity of NOS were significantly lower. After the application of L-Arg therapy, the activity of NOS did not change significantly, but the levels of serum NO and cGMP rose up significantly, and the level of serum ET was to the opposite direction. ConclusionsNO and ET may modulate hypoxic pulmonary hypertension, and acute hypoxia can result in acute hypoxic pulmonary hypertension. L-Arg can reverse the acute hypoxic hypertension.

Genetic Diseases, Inborn ; economics ; prevention & control ; therapy ; Humans ; Metabolic Diseases ; economics ; prevention & control ; therapy

Objective To investigate the antitumor mechanism of astragaloside combine with cetuximab on the colon cancer cell line RKO of EGFR over expression through cell proliferation and autophagy. Methods The cell proliferation of colon cancer cell line RKO intervened by astragaloside with or without cetuximab was detected by 4- methyl- teerazolium (MTT). The expressive changes for protein of EGFR 、P62 and LC3 in RKO cells was detected by western bolt. Results MTT showed that 100 ug/mL astragaloside combined with 120 ug/mL cetuximab had significantly inhibiting effect on RKO cells of EGFR expression. Western blot showed that astragaloside can affect the expression of P62 and LC3 to suppress the occurrence ofautophagy. Conclusion In the vitro studies showed that astragalosidecan enhance the antitumor cell proliferation of cetuximab through inhibit autophagy in the treatment of colon cancer.

Objective:To investigate influences of two different HLA-B antigens expressed on K562 cells on receptors expression of NK cells from peripheral blood lymphocytes.Methods:Studied the alteration of the percentage of CD16+CD56+ cells and the percentage of KIR3DL1+ cells before and after PBMC interaction with K562 cells for 24 hours,and also compared the percentage of CD16+CD56+ cells and the percentage of KIR3DL1+ cells after PBMC interaction with two different kind of K562 cells transfected with HLA-B39 and HLA-B51 respectively.Results:After PBMCs were incubated with K562 cells for 24 hours,the percentage of CD16+CD56+ cells and the percentage of KIR3DL1+ cells were both increased.However,after PBMCs were incubated with K562-HLA-B51 cells for 24 hours,the percentage of KIR3DL1+ cells and the percentage of CD16+CD56+ cells were both decreased in comparison with that interaction with K562-HLA-B39 cells.Conclusion:CD16 up-regulation was associated with an up-regulation of inhibitory receptors(KIR3DL1).The interaction between HLA-Bw4 and KIR3DL1 would down-regulate the expression of KIR3DL1.In addition,KIR3DL1 down-regulation was associated with down-regulation of activating receptors(CD16).

Objectives To analyse the antifungal susceptibility of Candida spp. isolated from the patients with recurrent vulvovaginal candidiasis (RVVC), vulvovaginal candidiasis (VVC) and asymptomatic carriers and to study the correlation between different Candida strains and antifungal susceptibility. Method According to the NCCLS-M27-A scheme, the antifungal susceptibility of Candida spp. isolated from the above different groups was measured. Results Almost all the MICs of C. glabrata and C. krusei to 8 antifungal agents were higher than those of C. albicans. The average MIC of C. albicans isolated from RVVC patients was higher than that from asymptomatic carriers. The resistant strains were mainly isolated from the RVVC group. No resistant strains against itraconazole, fluconazole, ketoconazole, econazole and nystatin was found in asymptomatic carriers. Conclusions These results indicate that more attention has to be paid to the low susceptibility of non-Candida albicans in the treatment of vulvovaginal candidiasis, and the resistant strains may result from long-term or irregular antifungal treatment.