摘要
Wings are an important flight organ of insects and their morphogenesis depends on a series of cell-to-cell and cell-to-extracellular matrix interactions.Integrin as a transmembrane protein receptor mediates cell-to-cell adhesion,cell-to-extracellular matrix interactions and signal transduction.In the present study,we characterized an integrin gene that encodes integrinβ-PS protein in Locusta migratoria.Lmlntegrinβ-PS is highly expressed in the wing pads and the middle stages of 5th instar nymphs.Immunohisto-chemical analysis revealed that the Lmlntegrinβ-PS protein was localized at the cell base of the two layers of wings.After suppression of Lmlntegrinβ-PS by RNA interference,the wing pads or wings were unable to form normally,with a blister wing appearance during nymph to nymph transition and nymph to adult transition.We further found that the dorsal and ventral epidermis of the wings after dsLmlntegrinβ-PS injection were improperly connected and formed huge cavities revealed by hematoxylin and eosin staining.Furthermore,the morphology and structure of the wing cuticle was significantly disturbed which affected the stable arrangement and attachments of the wing epidermis.Moreover,the expression of related cell adhesion genes was significantly decreased in LmIntegrinβ-PS-suppressed L.migratoria,suggesting that Lmlntegrinβ-PS is required for the morphogenesis and development of wings during molting by stabilizing cell adhesion and maintaining the cytoskeleton of these cells.
基金
the National Key R&D Program of China(2017YFD0200900)
National Natural Science Foundation of China(31702067,31970469)
NSFC-DFG(31761133021)
Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(2019L0033)
Key Research and Development Program of Shanxi Province,China(201803D221004-5)
2018 Special Talents Projects in Shanxi Province,China(201805D211019).
