Objective To observe the initial mechanism investigation in immune escaping correlated T cell proportion of Lewis lung cancer by Fuzheng-Peiyuan formula. To provide a theoretical basis for the application of the Chinese medicine of strengthening the body resistance in clinics. Methods The healthy C57BL/6J mice were divided into six groups by the random number table: the Chinese medicine group, the Chinese medicine plus chemotherapy group, the chemotherapy group, the model group and the normal control group. There were 6 mice in each group. All the groups expect the normal control group were inoculated subcutaneously with Lewis lung cancer cell suspension 0.2 ml. The medicine given to the Chinese medicine group were orally Fuzheng-Peiyuan formula with 8.17 g/kg. The combination group was given intraperitoneal injection of cyclophosphamide 60 mg/kg and orally Fuzheng-Peiyuan formula 8.17 g/kg. The chemotherapy group received the injection of cyclophosphamide 60 mg/kg and intragastric administration of normal saline. The model group and normal control group were administered with saline. After continuous administration for 13 days, the expressions of CD4, Foxp3, CD8 and CD28 in spleen cells of tumor bearing mice were observed by flow cytometry. Results Compared with the model group, the chemotherapy group and the chemotherapy combined with Chinese traditional medicine group showed that tumor weight (1.76 ± 0.42 g, 1.40 ± 0.43 g vs. 4.37 ± 0.59 g) significantly decreased (P<0.01); and the CD4+ Foxp3+ cells of mouse spleen cells in the Chinese medicine group and Chinese medicine plus chemotherapy group (11.25% ± 1.69%, 9.30% ± 2.68% vs. 14.21% ± 1.50 %) significantly decreased (P<0.05 or P<0.01). Conclusions The result initial proved that the Chinese medicine could strengthen the body resistance, adjust the proportion of Treg and CTL in spleen T cell in tumor-bearing mouse.

Objective To propose the blood detection strategies for human immunodeficiency virus (HIV) among blood donors, and provide reference for the detection, early diagnosis and transmission blocking of HIV. Methods A total of 117 987 blood samples from blood donors were screened using the third- and fourth-generation ELISA HIV detection reagents. Western blot analysis was used to verify the reactive results of the third-generation reagent alone, or both the third-generation and fourth-generation reagents. HIV nucleic acid test was carried out for those with negative test results of the third- and fourth-generation reagents. For those with positive results of the fourth-generation reagent only, nucleic acid test followed by a confirmatory test by Western blot analysis was carried out. Results 117 987 blood samples from blood donors were tested by different reagents. Among them, 55 were tested positive by both the third- and fourth-generation HIV detection reagents at the same time, accounting for 0.047% and 54 cases were confirmed HIV-positive by Western blot analysis, and 1 case was indeterminate, then turned positive during follow-up testing. 26 cases were positive by the third-generation reagent test alone, among which 24 cases were negative and 2 were indeterminate by Western blot analysis. The band types were p24 and gp160 respectively detected by Western blot analysis, and were confirmed to be HIV negative in follow-up testing. 31 cases were positive by the fourth-generation HIV reagent alone, among which 29 were negative by nucleic acid test, and 2 were positive according to the nucleic acid test.Western blot analysis was used to verify that the two cases were negative. However, after 2~4 weeks, the results turned positive when the blood sample was retested by Western blot analysis during the follow-up of these two cases. All the specimens that were tested negative by both the third- and fourth-generation HIV reagents were validated negative by HIV nucleic acid test. Conclusion A combined strategy with both third- and fourth-generation HIV detection reagents can play a complementary role in blood screening among blood donors. The application of complementary tests, such as nucleic acid test and Western blot analysis, can further improve the safety of blood supply, thus contributing to the early diagnosis, prevention, transmission and treatment of blood donors potentially infected by HIV.
Humans ; HIV Infections/diagnosis* ; HIV Antibodies ; Blood Donors ; HIV-1 ; Blotting, Western ; Nucleic Acids

Objective: To compare and analyze the antibacterial effects of platelets against five common clinical pathogenic bacteria including MRSA, SE, SA, E. coli, and CRKP, and to preliminarily explore the role of DCD sensitivity in the observed variations of antibacterial effects. Methods: The same number of platelets were used to establish co-culture systems of platelets and platelet lysates with the five pathogenic bacteria. The antibacterial effects of platelets and platelet lysates on the five pathogenic bacteria were evaluated by observing the turbidity of the bacterial solution, measuring the OD value of the bacterial solution and counting the colonies. The supernatant protein of platelets co-cultured with MRSA was collected for quantitative proteomics analysis to explore the important antibacterial proteins of platelets. The content of DCD in the supernatant after co-culture of platelets and platelet lysates with the five pathogenic bacteria was detected by ELISA to preliminarily analyze the reasons for the different antibacterial effects of platelets on the five pathogenic bacteria. Results: Compared with the control group of MRSA, SA, and SE, the turbidity of the bacterial solution decreased after co-culture of platelets and platelet lysates with MRSA, SA, and SE for 12 h, and the OD value and colony count were significantly reduced (P<0.05). The turbidity of the bacterial solution did not change significantly after co-culture of platelets and platelet lysates with E. coli for 24 h, but the OD value decreased (P<0.05), and the colony count decreased to 10 CFU/mL but the difference was not statistically significant (P>0.05). Compared with the control group of CRKP, the turbidity, OD value, and colony count of the bacterial solution did not change significantly after co-culture of platelets and platelet lysates with CRKP (P>0.05). Proteomics results showed that after co-culture with MRSA, important proteins related to platelet activation, including collagen, fibrinogen, von Willebrand factor, integrin αIIbβ3, platelet glycoprotein V and IV were significantly up-regulated. ELISA results showed that after co-culture with the five pathogenic bacteria, platelets could secrete a large amount of DCD, with the content around 3 μg/mL. Conclusion: The antibacterial effect of platelets on Gram-positive bacteria MRSA, SA, and SE is better than that on Gram-negative bacteria E. coli and CRKP, and platelets have the best antibacterial effect on MRSA. The differences in antibacterial effects of platelets on the five pathogenic bacteria may be related to the sensitivity of DCD antibacterial peptides to the five pathogenic bacteria.