Objectlve To explore the mechanism of the protection in high expression of HO-1 induced by CoPP on murine islet xenografts. Method An islet transplantation of a SD rat-to-C57 BL/6 mouse model was established.Mice were randomized into five groups i.e.control,CoPP-induction in vivo,CoPP+ZnPP in vivo.CoPP-induction in vitro and CoPP+ZnPP in vitro and the islet xenografts were transplanted into the subrenal capsule.Normoglycemia time was recorded and insulin-releasing test was performed.IL-10、TNF-α、IL-1β and INF-γ in serum and their cytokine mRNA and HO-1 in xenografts were measured by RT-PCR and Western-blotting.The pathological examination was done to observe the lymphocyte infiltration. Results There Was significant difference in the normoglycemia time between CoPP-induction in vivo and in vitro and other three groups.The results of insulin-releasing stimulated by low level glucose were identical among groups,but that of insulin-releasing stimulated by high-glucose in in vivo group were the hiishest as in CoPP-induction in vivo and in vitro and control group were 187.68 ±19.93、137.22±11.73,91.25±12.64 μIU·ml~(-1)·10islets~(-1)·45 min~(-1),(P<0.05).The IL-10 in serum in CoPP-induction in vivo and in vitro(in vivo:72.97±9.74 pg/ml;in vitro:70.84±3.56 pg/ml)was significantly hisher than other three groups(control:30.57±3.93 pg/ml;CoPP+ZnPP in vivo:39.78±3.00 pg/ml;CoPP+ZnPP in vitro:35.42±4.30 pg/ml).The expression tendency of IL-10 mRNA was similar to that of insulin secretion.There was no significant difieFence in TNF-α、IL-1β and INF-γ.The expression of HO-1 by PCR and Western-blot analysis in CoPP-induction in vivo and vitro was higher than other three groups.The pathological examination showed that fewer lymphocytes infiltrated into the islet xenografts from CoPP-treated in comparison with xenografts from other three groups. Conclusion HO-1 could improve the survival of islet xenograft:the induetion of HO-1 expression in vivo was much mole efficient than in vitro.The CoPP-induction could be related to immune modulation of IL-10.

Objective To explore the diagnostic value of serum ficolin-3(FCN3)and collagen triple helix repeat containing-1(CTHRC1)in non-small cell lung cancer(NSCLC)and their relationship with clinicopathological characteristics.Methods From July 2021 to August 2022,73 patients with NSCLC who were admitted to the our Hospital were selected as the study group,and 55 healthy people who came to our hospital for physical examination were regarded as the control group.the serum levels of FCN3 and CTHRC1 were measured by enzyme-linked immunosorbent assay(ELISA);Pearson method was applied to analyze the correlation of serum FCN3 and CTHRC1 levels in NSCLC patients;Logistic regression analysis was applied to analyze the influencing factors of NSCLC;the diagnostic value of serum FCN3 and CTHRC1 levels on the occurrence of NSCLC was analyzed by the ROC curve.Results The levels of serum FCN3 and CTHRC1 in the study group were obviously higher than those in the control group(P＜0.05);the levels of serum FCN3 and CTHRC1 were correlated with the degree of cancer cell differentiation,TNM stage and lymph node metastasis in NSCLC patients(P＜0.05);Pearson method analysis showed that there was a positive correlation between serum FCN3 and CTHRC1 levels in NSCLC patients(r=0.258,P=0.028);Logistic regression analysis showed that serum FCN3 and CTHRC1 were the influencing factors of NSCLC(P＜0.05);the area under the ROC curve of serum FCN3 and CTHRC1 levels in diagnosis of NSCLC was 0.869 and 0.810,respectively,the area under the ROC curve of NSCLC was 0.881,which were better than those of serum FCN3 and CTHRC1.Conclusion The levels of serum FCN3 and CTHRC1 in patients with NSCLC increase,which are related to the degree of cancer cell differentiation,TNM stage and lymph node metastasis,they are risk factor for NSCLC,and the combination of the two is more valuable in diagnosis of NSCLC.

We developed a method for accurate quantification of the intact virus particles in inactivated avian influenza virus feedstocks. To address the problem of impurities interference in the detection of inactivated avian influenza virus feedstocks by direct high performance size exclusion chromatography (HPSEC), we firstly investigated polyethylene glycol (PEG) precipitation and ion exchange chromatography (IEC) for H5N8 antigen purification. Under the optimized conditions, the removal rate of impurity was 86.87% in IEC using DEAE FF, and the viral hemagglutination recovery was 100%. HPSEC was used to analyze the pretreated samples. The peak of 8.5-10.0 min, which was the characteristic adsorption of intact virus, was analyzed by SDS-PAGE and dynamic light scattering. It was almost free of impurities and the particle size was uniform with an average particle size of 127.7 nm. After adding antibody to the IEC pretreated samples for HPSEC detection, the characteristic peak disappeared, indicating that IEC pretreatment effectively removed the impurities. By coupling HPSEC with multi-angle laser scattering technique (MALLS), the amount of intact virus particles in the sample could be accurately quantified with a good linear relationship between the number of virus particles and the chromatographic peak area (R²=0.997). The established IEC pretreatment-HPSEC-MALLS assay was applied to accurate detection of the number of intact virus particles in viral feedstocks of different subtypes (H7N9), different batches and different concentrations, all with good applicability and reproducibility, Relative standard deviation < 5%, n=3.
Animals ; Reproducibility of Results ; Influenza A Virus, H7N9 Subtype ; Influenza in Birds ; Chromatography, Gel ; Virion ; Lasers