Differentially expressed genes in resistant and susceptible Bombyx mori strains infected with a densonucleosis virus.
We investigated variations in the gene expression of Bombyx mori following infection with a densonucleosis virus (BmDNV-Z). Two B. mori near-isogenic lines, Jingsong and Jingsong.nsd-Z.NIL, which are highly susceptible and completely resistant to BmDNV-Z, respectively, were used in this study. The infection profiles of BmDNV-Z in the midguts of the B. mori Jingsong and Jingsong.nsd-Z.NIL larvae revealed that the virus invaded the midguts of both of these strains. However, its proliferation was notably inhibited in the midgut of the resistant strain. By using the suppression subtractive hybridization method, three cDNA libraries were constructed to compare BmDNV-Z responsive gene expression between the two silkworm lines. In total, 151 differentially expressed genes were obtained. Real-time qPCR analysis confirmed that 11 genes were significantly up-regulated in the midgut of the Jingsong.nsd-Z.NIL strain following BmDNV-Z infection. Our results imply that these up-regulated genes might be involved in B. mori immune responses against BmDNV infection.
Bao
Yan-Yuan
YY
Institute of Insect Sciences, Zhejiang University, Kaixuan Road 268, Hangzhou 310029, China.
Li
Mu-Wang
MW
Zhao
Yun-Po
YP
Ge
Jun-Qing
JQ
Wang
Cheng-Shu
CS
Huang
Yong-Ping
YP
Zhang
Chuan-Xi
CX
D000818:Animals; D012831:Bombyx / Q000235:genetics / Q000276:immunology* / Q000821:virology; D018076:DNA, Complementary; D019223:Densovirinae / Q000502:physiology*; D041981:Gastrointestinal Tract / Q000276:immunology / Q000821:virology; D015870:Gene Expression; D017344:Genes, Insect; D054884:Host-Pathogen Interactions; D007814:Larva / Q000276:immunology / Q000821:virology; D016133:Polymerase Chain Reaction
D018076:DNA, Complementary