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Modulation of GAPDH expression and cellular localization after vaccinia virus infection of human adherent monocytes.

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Nahlik K. W., Mleczko A. K., Gawlik M. K., Rokita H. B.
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2003
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vol. 50
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issue 3
667-676
EN
Vaccinia virus is able to replicate in many cell types and is known to modulate apoptosis in infected cells. In this study, expression of apoptosis-related genes was screened in human adherent monocytes after vaccinia infection using a DNA array. A marked increase of the key glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) expression was found. Increased expression and nuclear translocation of GAPDH have recently been reported to participate in apoptosis of many cell types. To confirm the array results, levels of GAPDH mRNA were estimated by RT-PCR, showing an increase at 4 h p.i. followed by a slight decrease, which correlated with the viral anti-apoptotic E3L gene transcript levels. Subcellular localization of the enzyme in human monocytes was examined by Western blot and immunostaining of the infected cells. Both experiments revealed accumulation of GAPDH in the nucleus at 14 h p.i., which was completely suppressed at 24 h p.i. This might indicate GAPDH as a novel target for vaccinia anti-apoptotic modulation.
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Cloning and partial characterization of a gene in Bombyx mori homologous to a human adiponectin receptor

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Zhu M., Chen K., Wang Y., Guo Z., Yin H., Yao Q., Chen H.
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2008
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vol. 55
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issue 2
241-249
EN
In this study, we report the cloning and characteristics of an adiponectin-like receptor gene from Bombyx mori (BmAdipoR) with highly conserved deduced amino-acid sequences and similar structure to the human adiponectin receptor (AdipoR). Structural analysis of the translated cDNA suggested it encoded a membrane protein with seven transmembrane domains. BmAdipoR was found to be expressed in multiple tissues and highly expressed in Malpighian tubules, fat body and testis. BmNPV (Bombyx mori nucleopolyhedrovirus) bacmid system combined with confocal microscopy revealed that BmAdipoR was targeted to the cell membrane. We also found that infection with BmNPV did not have an effect on BmAdipoR mRNA quantity in the midgut of susceptible Bombyx mori strain (306) at 48 h, but BmAdipoR mRNA quantity increased significantly at 72 h. We concluded that BmAdipoR gene was a membrane protein ubiquitously expressed in Bombyx mori tissues and that its expression was altered by treating with BmNPV.
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