Microarray analysis of the gene expression profile in the midgut of silkworm infected with cytoplasmic polyhedrosis virus |
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Authors: | Ping Wu Xiu Wang Guang-xing Qin Ting Liu Yun-Feng Jiang Mu-Wang Li Xi-Jie Guo |
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Institution: | (1) School of Biotechnology and Environmental Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212018, China;(2) Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture of The People’s Republic of China, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, China; |
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Abstract: | In order to obtain an overall view on silkworm response to Bombyx mori cytoplasmic polyhedrosis virus (BmCPV) infection, a microarray system comprising 22,987 oligonucluotide 70-mer probes was
employed to compare differentially expressed genes in the midguts of BmCPV-infected and normal silkworm larvae. At 72 h post-inoculation,
258 genes exhibited at least 2.0-fold differences in expression level. Out of these, 135 genes were up-regulated, while 123
genes were down-regulated. According to gene ontology (GO), 140 genes were classified into GO categories. Kyoto Encyclopedia
of Genes and Genomes (KEGG) pathway analysis indicates that 35 genes were involved in 10 significant (P < 0.05) KEGG pathways. The expressions of genes related to valine, leucine, and isoleucine degradation, retinol metabolism,
and vitamin B6 metabolism were all down-regulated. The expressions of genes involved in ribosome and proteasome pathway were
all up-regulated. Quantitative real-time polymerase chain reaction was performed to validate the expression patterns of 13
selected genes of interest. The results suggest that BmCPV infection resulted in the disturbance of protein and amino acid
metabolism and a series of major physiological and pathological changes in silkworm. Our results provide new insights into
the molecular mechanism of BmCPV infection and host cell response. |
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