Rab32 and the remodeling of the imaginal midgut in Helicoverpa armigera.
Midgut remodeling is a complex physiological process in holometabolous insects. During midgut remodeling, the larval midgut is decomposed by apoptosis or autophagy during metamorphosis, and the degraded larval midgut is partially absorbed as nutrients by the imaginal midgut for its formation. The molecular mechanism involved in this process is not clear. Here, we found that a Rab protein, which we have named HaRab32, is related to the organogenesis of insect imaginal midgut. Results show that HaRab32 is up-regulated in epidermis and midgut during metamorphosis. Its expression could be up-regulated by 20E. Immunohistochemistry shows Rab32 is distributed in the epithelium of the imaginal midgut during metamorphosis. Knockdown of HaRab32 by RNA interference disturbs the formation of the imaginal midgut. These data imply HaRab32 plays important roles in midgut remodeling by participating in the imaginal midgut formation.
Hou
Li
L
School of Life Sciences, Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, Shandong University, Jinan, Shandong, China.
Wang
Jin-Xing
JX
Zhao
Xiao-Fan
XF
D000818:Animals; D004064:Digestive System / Q000254:growth & development / Q000378:metabolism; D018507:Gene Expression Regulation, Developmental; D019476:Insect Proteins / Q000235:genetics / Q000378:metabolism*; D008675:Metamorphosis, Biological; D008969:Molecular Sequence Data; D009036:Moths / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism*; D020691:rab GTP-Binding Proteins / Q000235:genetics / Q000378:metabolism*
D019476:Insect Proteins; D020691:rab GTP-Binding Proteins