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Objective To investigate the expressions of leukaemia inhibitory factor (LIF) and regulated upon activation,normal T cell expressed and secreted factor (RANTES) in mice with bloodstream infection by 4 different single pathogen and provide research basis for the early diagnosis of bacteriogenous bloodstream infection.Methods CD-1 (ICR,Institute of Cancer Research) mouse models of bloodstream infection with the standard strains of Staphylococcus aureus (S.aureus),Enterococcus faecalis (E.faecalis),Escherichia coli (E.coli) and Klebsiella pneumonia(K,pneumoniae) were established.The serum samples were collected at the 0.5,1,3,6,12,24 and 48 hours after infection and the concentrations of LIF and RANTES in mouse serum of experimental groups and control were detected by Luminex liquid chip system.Results The median lethal dose (LD50) of S.aureus,E.faecalis,E.coli and K.pneumoniae were 8.1 × 108/mL,9.6 × 108/mL,8.1 × 108/mL and 1.1 × 109/mL,respectively.The concentration of serum LIF was significantly increased in 1 hour after infection.The peak concentrations of LIF in the four groups were (51.6±5.0),(73.2±20.8),(7.3 ±0.9)and (6.1 ± 1.2) pg/mL respectively,and the differences were statistically significant compared with the control group (P ＜ 0.01).The concentrations of RANTES in E.faecalis group,E.coli group and K.pneumoniae group were increased after infection for 1 hour and increased significantly after infection for 3 hours.The increased concentrations of RANTES in E.coli group and K.pneumoniae group were more than those in S.aureus group and E.faecalis group.The peak concentrations of RANTES in S.aureus group,E.faecalis group,E.coli group and K.pneumoniae group were (1 929.0-± 25.2),(1 218.1 ± 227.4),(55.7 ± 10.0) and (179.2 ± 9.2)pg/mL,and the differences were statistically significant compared with the control group (P ＜ 0.01).Conclusion The concentrations of LIF and RANTES increased obviously in 1 h after the bacteria entered bloodstream.After 2 days of infections,the levels of LIF and RANTES in E.coli group and K.pneumoniae group were significantly higher than those in S.aureus group and the E.faecalis group.Combined detections of LIF and RANTES may be of certain values to differentiate the infections caused by the pathogens between gram positive and gram negative bacteria.
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Objective To investigate the association between both regulated upon activation normal T cell expressed and secreted (RANTES)-403G/A,-28C/G gene polymorphism and the susceptibilities to hepatitis B virus (HBV) infection,among people with Dong and Han ethnicities,in Guizhou.Methods A total of 229 individuals with HBV persistence infection,161 HBV clearanced patients and another 200 controls were recruited to conduct a case-control study among residents with Dong or Han ethnicities.Allelic frequencies of both RANTES-403G/A and-28C/G were identified by TaqMan-MGB probe.Results Both RANTES-403G/A and-28C/G polymorphism in the HBV-persistent group,when compared to the HBV-clearances group,no significant difference was found (P＞0.05).Results from the univariate analysis showed that subjects carrying-403AG and-28GG genotype had higher risk on the susceptibility to HBV persistence infection.The distributions of RANTES-28C/G gene polymorphism between Dong minority and Han ethnicities regarding HBV persistence showed statistically significant difference (P＜0.05).There was no difference on the distributions of RANTES-403G/A gene polymorphism between Dong minority and Han ethnicities.Conclnsion Patients that carrying both RANTES-403AG and-28GG genotype had higher risk on the persistence to HBV,while RANTES-403A had contributed to the clearance of HBV infection.
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This study examined the role of regulated upon activation normal T cell expressed and secreted (RANTES) and its receptor C-C chemokine receptor type 5 (CCR5) in gastric cancer metastasis and the associated mechanism.The expression of RANTES and CCR5 was detected by using immunohistochemical staining and Western blotting in the gastric cancer tissues obtained from 60 gastric cancer patients with or without lymph node metastasis (n=30 in each).The results showed that the expression levels of RANTES and CCR5 were higher in gastric cancer with lymph node metastasis than in that without metastasis (P＜0.05).The expression levels of RANTES in 30 lymph nodes with cancerous invasion were higher than in 30 normal lymph nodes (P＜0.05).Chemotactic test revealed that the number of migrating gastric cancer cells (n=295.0±54.6) induced by the protein of cancer-invading lymph nodes was greater than that by the protein mixture from cancer-invading lymph nodes and RANTES antibody (n=42.5+11.6) (P＜0.05).RT-PCR showed that the expression levels of the main Th1 cytokines (IL-2,γ-IFN) were lower in gastric cancer with lymph node metastasis (2.22±0.90,3.26±1.15 respectively)than in that without metastasis (3.07±1.67,4.77±1.52 respectively) (P＜0.05),but the expression level of the main Th 2 cytokine (IL-10) was higher in gastric cancer with lymph nodes metastasis (6.06±2.04)than in that without metastasis (4.88±1.87) (P＜0.05).It was concluded that RANTES and its receptor CCR5 may contribute to gastric cancer metastasis through influencing the balance of Th1/Th2.RANTES and CCR5 may become a marker of gastric cancer metastasis.
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Objective To investigate the association of single nucleotide polymorphisms(SNPs)in regulated upon activation normal T cell expressed and secreted (RANTES) gene C-28G(RANTES C-28G),RANTES A-403G and Eotaxin-3 gene C +77T(Eotaxin-3 C+77T) with asthma in Han ethnic children. Methods The buccal mucosa swabs of 192 Han ethnic children with asthma (asthma group) were collected,and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was employed to detect the SNP loci of RANTES A-403G,C-28G and Eotaxin-3 C+77T.Besides,another 192 healthy subjects (aged 18 to 22 years) without sibship with those in asthma group were served as controls.Genotype and genotypic distribution between these two groups were analysed. Results There was no significant differences in genotype and genotypic distribution of SNP loci of RANTES A-403G and RANTES C-28G between asthma group and control group (P>0.05),while there were significant differences in genotypic distribution of Eotaxin-3 C+77T between these two groups.The frequency of Eotaxin-3 C+77T T/T genotype in asthma group was significantly higher than that in control group (32.3% vs 12.5%,OR=3.44,P=0.000). Conclusion Eotaxin-3 C+77T may be the asthma susceptible SNP loci for Han ethnic children,and Eotaxin-3 C+77T T/T is significantly related with the development of childhood asthma
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Objective To explore the roles of macrophage inflammatory protein- 1?(MIP- 1?) and regulated upon activation normal I" cell expressed and secreted(RANTES)in pathogenesis of respiratory syncytiai virus(RSV) infection,and explore the roles of these chemokines asthma caused by RSV mfectron. Methods Serum samples were obtained from 45 infants with RSV infection, including 10 hroivhial asthma, 15 bronchitis or pneumonia ,20 upper respiratory tract infection ;20 healthy infants with non - RSV infection as the normal group. ELISA method was used to determine the concentrations of MIP- 1? and RANTES in serum. Results MIP - 1? and RANTES levels in infants with RSV infection were much higher than those of non - RSV infected healthy subjects (P