Autoimmune Diseases ; immunology ; Gene Expression Regulation ; immunology ; Humans ; Immunoglobulin G ; genetics ; immunology ; Sclerosis ; genetics ; immunology ; pathology

OBJECTIVETo characterize the immune reaction in SD rats exposed to trichloroethylene (TCE) and to identify the gene expression profiles involved in skin after TCE exposure.

METHODSFifteen percent of TCE was injected intradermally into the rat back (100 microL/120 g) at intervals of 7 days. Whole blood was collected 24 h after the fifth or seventh intradermic administration of TCE. The percentages of CD4+ and CD8+ of T lymphocytes were measured by a flow cytometer. The concentrations of IFN-gamma and IL-4 in the serum were semi-quantified by ELISA. Total RNAs of skin samples at 3 h or 24 h after the seventh dose of TCE in SD rats were extracted, and gene expression profiles of these tissues were analyszed by rat toxicology U34 array of Affymetrix.

RESULTSObvious decline of CD4+ in T lymphocytes was observed in the TCE-administer group. No significant concentration differences in IFN-gamma and IL-4 were found between TCE-treated and control rats. Gadd45a and Mel were significantly up regulated in skin tissue 24 h after TCE exposure. The expression regulation of immune response factors was as active as proteins associated with lipid metabolism and synthesis process in these skin samples of SD rats exposed to TCE.

CONCLUSIONT-helper type 1 cells mediate immune response can not be elicited in TCE-treated SD rats, but certain immune disorder can be induced.

Animals ; Female ; Gene Expression ; immunology ; Gene Expression Profiling ; Male ; Rats ; Rats, Sprague-Dawley ; Skin ; immunology ; Trichloroethylene ; immunology

Coxsackievirus Infections ; immunology ; virology ; Enterovirus A, Human ; physiology ; Enterovirus Infections ; immunology ; virology ; Gene Expression Regulation ; immunology ; Gene Expression Regulation, Viral ; Host-Pathogen Interactions ; immunology ; Humans

Gene Expression Regulation ; immunology ; Gene Expression Regulation, Viral ; HIV Infections ; genetics ; immunology ; metabolism ; HIV-1 ; genetics ; immunology ; Humans ; Immunity, Innate ; genetics ; immunology

As one of the most serious types of psoriasis, pathogenesis of erythrodermic psoriasis (EP) is unclear so far. In this study, we aimed to detect the levels of Th1/Th2 cytokine-associated transcription factors and T-lymphocyte clone in peripheral blood mononuclear cells (PBMCs) derived from EP patients, and gene expression level of T-bet/GATA-3 in skin lesion. The potential role of Th1/Th2 reaction pattern played in the pathogenesis of EP was also discussed. Serum levels of IFN-γ, IL-2, IL-4 and IL-10 were quantified by ELISA among 16 EP patients, 20 psoriasis vulgaris (PV) patients and 15 healthy controls. The expression levels of T-bet/GATA-3 in the skin lesion and PBMCs were examined by real-time qPCR. The ratio of Th1/Th2 was measured by flow cytometry. The levels of IFN-γ, IL-2, IL-4 and IL-10 were higher in EP patients than in the healthy controls. The levels of IL-4 and IL-10 were 69.44±11.45 and 12.62±4.57 pg/mL, respectively, in EP patients, significantly higher than those in PV patients and healthy controls (P<0.05). Flow cytometry revealed the levels of both Th1 and Th2 in PBMCs from EP patients were higher than those in healthy controls, and the Th1/Th2 ratio was dramatically lower than in PV patients (P<0.01). The ratios of IFN-γ/IL-4 and T-bet/GATA-3 in EP patients were both less than 1.0, suggesting a reversal when compared with the other two groups. Our study indicated that the EP patients exerted a Th1/Th2 bidirectional response pattern, and the balance of Th cell subsets inclines to Th2, which might be one of the important mechanisms of EP pathogenesis.
Adult ; Cytokines ; immunology ; Dermatitis, Exfoliative ; immunology ; pathology ; Female ; Gene Expression Regulation ; immunology ; Humans ; Male ; Psoriasis ; immunology ; pathology ; Skin ; immunology ; pathology ; Th1 Cells ; immunology ; pathology ; Th2 Cells ; immunology ; pathology

The aim of this study was to investigate the expression of MHCⅠ gene in different tissues of Rana dybowskii under the stress of Aeromonas hydrophila (Ah), and to provide evidence for revealing the anti-infective immune response mechanism of amphibians. The experimental animal model of Aeromonas hydrophila infection was first constructed, and the pathological changes were observed by HE staining. The MHCⅠ gene α1+α2 peptide binding region of Rana dybowskii was cloned by RT-PCR and analyzed by bioinformatics. Real-time PCR was used to detect the transcription level of MHCⅠ in different tissues under Ah stress. After Ah infection, the skin, liver and muscle tissues showed signs of cell structure disappearance and texture disorder. The MHCⅠ gene α1+α2 peptide binding region fragment was 494 bp, encoding 164 amino acids, and homology with amphibians. Above 77%, the homology with mammals was as low as 14.96%, indicating that the α1+α2 region of MHC gene was less conserved among different species. The results of real-time PCR show that the liver, spleen and kidney of the experimental group were under Ah stress. The transcript levels of MHCⅠ gene in skin and muscle tissues were higher than those in the control group at 72 h, but the time to peak of each tissue was different (P<0.01), indicating that the response time of MHCⅠ gene in different tissues was different under Ah stress. This study provides a reference for further exploring the immune function of MHC molecules in anti-infection.
Aeromonas hydrophila ; Animals ; Gene Expression Profiling ; Gene Expression Regulation ; immunology ; Gram-Negative Bacterial Infections ; immunology ; Liver ; metabolism ; Ranidae ; genetics ; immunology ; microbiology ; Skin ; metabolism

Animals ; B7-H1 Antigen ; immunology ; Cell Line, Tumor ; Gene Expression Regulation, Neoplastic ; immunology ; Humans ; Interferons ; immunology ; Mice ; Neoplasm Proteins ; immunology ; Neoplasms ; immunology ; Up-Regulation ; immunology

OBJECTIVETo investigate the expression of immune-related genes during osteogenesis stimulated by simvastatin.

METHODSAfter treated with simvastatin, the expression of immune-related genes of mouse osteoblast was examined with gene chip (BiostarM-140s).

RESULTSThere were 16 differently expressed genes related to immune function, with nine down-regulated genes and seven up-regulated genes.

CONCLUSIONSAfter treated with simvastatin, expression of inflammation related genes is down-regulated and inflammation inhibitor genes is up-regulated in mouse osteoblasts.

Animals ; Down-Regulation ; Gene Expression Profiling ; Gene Expression Regulation ; Mice ; Osteoblasts ; drug effects ; immunology ; Osteogenesis ; drug effects ; Simvastatin ; pharmacology

Hepatitis B virus core antigen (HBcAg) is a major viral nucleocapsid protein of HBV. It is a 21-22kD protein consisting of 183-185 amino acids. Because of its easy purification, strong immunogenicity, high expression level, and self-assembles into the virus-like particles (VLP), HBcAg could be an efficient and safe VLP carrier for developing vaccines for various pathogens. Up to now, HBcAg VLP carrier has been an important system to develop novel vaccines and many antigen epitope genes from viruses, bacteria and parasites were expressed successfully using the system.
Animals ; Defective Viruses ; genetics ; immunology ; Gene Expression ; Hepatitis B Core Antigens ; genetics ; immunology ; Humans ; Vaccines ; genetics ; immunology

Contagious ecthyma (also known as orf) is an acute skin zoonosis caused by orf virus (ORFV), which affects sheep, goats and humans. As one of the typical species of the Parapoxvirus genus of the Poxviridae family, orf virus has distinctive and unique characteristics of these species. A range of immuno-modulatory/pathogenesis -related genes acquired by virus that function is to limit (at least transiently) the effectiveness of host immunity during its evolution. This review is aimed to describe the latest progress on the molecular characteristics of ORFV, and upon which we analyzed molecular mechanism of the immune escape designed and a set of strategies developed for ORFV to effective against immune clearance of the host. Known as an essential component in evolutionary system, host is regulated by ORFV for using in population evolution. By the ORFV evolutional immune regulation components and its effect approach, we can understand the viral biological characteristics of ORFV, and it is helpful for us to further study the counter-measures of this disease.
Animals ; Ecthyma, Contagious ; immunology ; virology ; Gene Expression Regulation, Viral ; Immune Evasion ; Orf virus ; genetics ; immunology ; Viral Proteins ; genetics ; immunology