02248nas a2200265   4500008004600000245010000046210006900146300001300215490000700228520133300235653003201568653001201600653004701612653003201659653004301691653003801734653005201772653003001824100001501854700001701869700001601886700001401902700001601916856005001932       Submitted                   eng d     00aGene expression responses in larvae of the fleshfly Sarcophaga bullata after immune stimulation0 aGene expression responses in larvae of the fleshfly Sarcophaga b  a98 - 1060 v553 aInsect larvae develop in decaying organic matter and their defence against various microorganisms must therefore be highly efficient. In the present study, we explored the transcriptional kinetics and induction levels of eight genes in Sarcophaga bullata larvae after infection or aseptic injury. Using real-time PCR, we studied the time-dependent immune response of larvae of the fleshfly S. bullata. We compared the mRNA levels of eight selected genes in induced and non-induced larvae. The third-instar larvae of S. bullata were induced by injecting a bacterial suspension of Escherichia coli, Staphylococcus aureus or Pseudomonas aeruginosa, or by simple aseptic injury with an entomological pin. We used intact larvae as a control for basal mRNA expression. Total RNA was isolated from the whole body, fat body and haemocytes. We determined the mRNA levels of genes encoding sapecin, transferrin, prophenoloxidase 1 and 2, storage-binding protein, cathe psin L, sarcocystatin, and 26/29 kDa protease. We found that there was massive up-regulation of genes encoding the fleshfly peptide sapecin, as well as the protein transferrin. We also detected down-regulation of, or no change in, the expression of genes that encode prophenoloxidase 1 and 2, storage-binding protein, cathepsin L, sarcocystatin, and 26/29 kDa protease.10a*Gene Expression Regulation10aAnimals10aDiptera/*genetics/*immunology/microbiology10aEscherichia coli/immunology10aLarva/genetics/immunology/microbiology10aPseudomonas aeruginosa/immunology10aReverse Transcriptase Polymerase Chain Reaction10aStaphylococcus/immunology1 aMasova, A.1 aSindelka, R.1 aKubista, M.1 aKindl, J.1 aJiracek, J.  uhttps://sarcophagidae.myspecies.info/node/292