Objective To study cloning and the primary function of a new gene AsTP2 transactivated by arsenic trioxide. Methods Using suppression subtractive hybridization (SSH) technique, the mRNA was isolated from HepG2 cells treated with arsenic trioxide (5?mol/L) and 0.9 percent sodium chloride, respectively, then cDNA was synthesized. SSH method was employed to analyze the differentially expressed DNA sequences between the two groups. From the subtractive cDNA library of genes transactivated by arsenic trioxide, the coding sequence of a new gene was obtained by bioinformatics method, and amplified by the method of reverse transcription polymerase chain reaction (RT-PCR). Results The novel gene was named as AsTP2, which was logged in the GenBank with the accession number AY744366. AsTP2 of 1119 nucleotides (nt), coding a protein of 372 amino acid residues (aa). Conclusion A new gene has been recognized as the new target transactivated by arsenic trioxide. The results will give a new clue to explore the molecular carcinogenic mechanism of inorganic arsenic.

Objective In order to understand the differentially expressed genes and explore the effects on mechanism of gene expression induced by arsenic trioxide. Methods The mRNA was isolated from human HepG2 cells treated with arsenic trioxide( 5?mol/L ) and DMSO, respectively, then cDNA was synthesized. After restriction enzyme Rsa Ⅰ digestion, small sizes cDNA were obtained. Then tester cDNA was subdivided into two portions and each was ligated with different cDNA adaptor. After tester cDNA was hybridized with driver cDNA twice and underwent nested polymerase chain reaction (PCR) twice, the DNA fragment was subcloned into T/A plasmid vectors to set up the subtractive cDNA library. Amplification of the library was carried out with E. coli strain JM109. The cDNA was sequenced and analyzed in GenBank with Blast search after colony PCR. Results The forward subtracted cDNA library from HepG2 cell line induced by arsenic trioxide was successfully constructed. The sequencing analysis showed that there were eight clones contained ferritin H(L) chain in the library. Conclusion Arsenic trioxide can induce the up expression of ferritin H(L) chain protein in HepG2 cells, indicated that the ferritin H(L) chain may play certain role in the mechanism of anti-arsenical cytotoxicity in liver.

Objective To analyze the characteristics of somatotypes of South Asian type, North Asian type and East Asian type, and to compare the main differences among them. Methods The characteristics of somatotypes among South Asian type, North Asian type and East Asian type in 29 Chinese Mongolian ethnic groups were compared by using the Heath-Carter anthropometric somatotype. The reasons for differences of South Asian type were that North Asian type were analyzed by using principal component analysis. Results The male groups of North Asian type were endomorphic mesomorph and the South Asian types were balanced mesomorph, while the East Asian types differed greatly from each other.The female groups of North Asian types and the East Asian types were mesomorphic endomorph and the South Asian types were endomorphic mesomorph. The somatotypes of East Asian types were similar to North Asian types but were greatly different from South Asian types.Principal components analysis showed that the main differences between South and North of male groups lied first in ectomorphy and then in endomorphy.The differences between female groups of South and North were mainly on endomorphy. Conclusion The ethnic group of North Asian type is higher than South Asian type in endomorphy but lower in ectomorphy.

The expression of inducible co-stimulator (ICOS) in peripheral blood T lymphocytes from the patients with systemic lupus erythematosus (SLE) and the role in the pathogenesis of SLE was investigated. By using two-color immunofluorescent staining and flow cytometric assay, the expression levels of ICOS in peripheal blood T lymphocytes from 33 patients with SLE and 16 healthy volunteers were detected. SLE diseases activity index (SLEDAI) of the patients with SLE was used to evaluate the disease activity. The correlation between the ICOS expression and SLEDAI was analyzed among the groups. The results showed that the expression levels of ICOS in T lymphocytes in active SLE group was markedly higher than those in the control and inactive SLE groups (both P< 0.01). There was no significant difference in the expression levels of ICOS between the inactive SLE and the control groups (P>0.05). In active SLE and inactive SLE groups, positive linear correlation was found between the levels of the ICOS expression in T lymphocytes and SLEDAI (r=0. 711, P=0.001; r=0.561, P=0.03). It was suggested that the expression of ICOS in peripheral blood T lymphocytes from the patients with active SLE was up-regulated and and ICOS might be related to the pathogenesis of SLE.
Antigens, Differentiation, T-Lymphocyte/*biosynthesis ; Antigens, Differentiation, T-Lymphocyte/genetics ; Lupus Erythematosus, Systemic/blood ; Lupus Erythematosus, Systemic/etiology ; Lupus Erythematosus, Systemic/*immunology ; T-Lymphocytes/*immunology

Objective To investigate the expression of inducible co-stimulator (ICOS) on T lymphocytes in peripheral blood from the patients with systemic lupus erythematosus (SLE). Methods Two-color immunofluorescent staining and flow cytometric assay were used to analyze the level of ICOS expression on T lymphocytes in peripheral blood from 33 SLE patients and 16 healthy volunteers. The data of systemic lupus erythematosus diseases activity index (SLEDAI) in SLE patients were also collected. Results The level of ICOS expression on T cells from active SLE group was markedly higher than that in the control group and the inactive SLE group (P 0.05). However, a positive correlation between the expression level of ICOS and the SLEDAI score was found in both active SLE group and inactive SLE group(r = 0.711,P = 0.001?r = 0.561,P = 0.03). Conclusions The expression of ICOS on T cell in peripheral blood from active SLE is increased, which might play a role in the pathogenesis of SLE.

Summary: The expression of inducible co-stimulator (ICOS) in peripheral blood T lymphocytes from the patients with systemic lupus erythematosus (SLE) and the role in the pathogenesis of SLE was investigated. By using two-color immunofluorescent staining and flow cytometric assay, the expression levels of ICOS in peripheal blood T lymphocytes from 33 patients with SLE and 16 healthy volunteers were detected. SLE diseases activity index (SLEDAI) of the patients with SLE was used to evaluate the disease activity. The correlation between the ICOS expression and SLEDAI was analyzed among the groups. The results showed that the expression levels of ICOS in T lymphocytes in active SLE group was markedly higher than those in the control and inactive SLE groups (both P<0.01). There was no significant difference in the expression levels of ICOS between the inactive SLE and the control groups (P>0.05). In active SLE and inactive SLE groups, positive linear correlation was found between the levels of the ICOS expression in T lymphocytes and SLEDAI (r=0.711, P＝0.001; r=0.561, P＝0.03). It was suggested that the expression of ICOS in peripheral blood T lymphocytes from the patients with active SLE was up-regulated and and ICOS might be related to the pathogenesis of SLE.