Comparative proteome analysis of silkworm in its susceptibility and resistance responses to Bombyx mori densonucleosis virus

Chen, H.-Q.; Yao, Q.; Bao, F.; Chen, K.-P.; Liu, X.-Y.; Li, J.; Wang, L.

Intervirology 55(1): 21-28


ISSN/ISBN: 1423-0100
PMID: 21242662
DOI: 10.1159/000322381
Accession: 052215802

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Bombyx mori densonucleosis virus (BmDNV) is one of the most disastrous viruses in cocoon production. Silkworm resistance to BmDNV has been examined previously using a number of traditional biochemical and molecular techniques. In this study, a near isogenic line, BC(6), was constructed to eliminate the difference in inherited background, which has 99.9% identity with the susceptible strain but carries a resistant gene. We utilized a proteomic approach involving two-dimensional differential gel electrophoresis and mass spectrometry to examine changes in the midgut proteins from the susceptible and resistant silkworm larvae infected with BmDNV. The protein profiles were compared and 9 differentially expressed proteins were identified by mass spectrometry. In the resistant strains, the heat-shock 70-kDa protein cognate, cytochrome P450, vacuolar ATP synthase subunit B, arginine kinase, vacuolar ATP synthase subunit D and glutathione S-transferase sigma were strongly upregulated and α-tubulin was downregulated. Our results imply that these upregulated genes and the downregulated genes might be involved in B. mori immune responses against BmDNV-Z infection.