Tumor Necrosis Factor-alpha-induced Protein 1 and Immunity to Hepatitis B Virus
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Aim: To compare the gene expression profile in a pair of HBV-infected twins.
Methods: The gene expression profile was compared in a pair of HBV-infected twins.
Results: The twins displayed different disease outcomes. One acquired natural immunity against HBV, whereas the other became a chronic HBV carrier. Eighty-eight and forty-six genes were found to be up- or down-regulated in their PBMCs, respectively. Tumor necrosis factor-alpha-induced protein 1 (TNF-alphaIP1) that expressed at a higher level in the HBV-immune twins was identified and four pairs of siblings with HBV immunity by RT-PCR. However, upon HBV core antigen stimulation, TNF-alphaIP1 was downregulated in PBMCs from subjects with immunity, whereas it was slightly upregulated in HBV carriers. Bioinformatics analysis revealed a K+ channel tetramerization domain in TNF-alphaIP1 that shares a significant homology with some human, mouse, and C elegan proteins.
Conclusion: TNF-alphaIP1 may play a role in the innate immunity against HBV.
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