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| Content Provider | Springer Nature Link |
|---|---|
| Author | Decombel, Luc Smagghe, Guy Tirry, Luc |
| Copyright Year | 2004 |
| Abstract | In a first series of experiments, the biological response of a continuous cell line of the beet armyworm, Spodoptera exigua, was tested with different groups, of insecticides with different modes of actions; acetylcholinesterase inhibitors, acetycholine receptor agonists, inhibitors and uncouplers of oxidative phosphorylation, site I electron transport inhibitors, gamma-aminobutyric acid receptor inhibitors, chitin synthesis inhibitors, and juvenile hormone analogues. From the concentration response curves, 50% inhibition concentration (IC$_{50}$) values were calculated. The most active compound in vitro was pyridaben with an IC$_{50}$ value of 0.0083 ppm. In a second series of experiments, the toxicity of these insecticide groups was determined on third-instar larvae of S. exigua, and lethal concentration with 50% kill (LC$_{50}$) values were used in the evaluation of their in vivo biological activity. Toxicity bioassays showed that lufenuron was the most toxic (LC$_{50}$=0.098 ppm). To explain the discrepancies in biological responses in vitro with insect cells compared with in vivo conditions with whole third-instar larvae, the significance of different detoxifying enzyme systems was tested. P$_{450}$ monooxygenases, esterases, and glutathione S-transferases were measured in third-instar larvae and cells of S. exigua. Data are discussed in terms of the usefulness of insect cell cultures as tools in the screening for novel insecticide actions. |
| Starting Page | 43 |
| Ending Page | 51 |
| Page Count | 9 |
| File Format | |
| ISSN | 10712690 |
| Journal | In Vitro Cellular & Developmental Biology - Animal |
| Volume Number | 40 |
| Issue Number | 1-2 |
| e-ISSN | 1543706X |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2004-01-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | cell cultures neurotoxins IGR METI MTT-assay Cell Biology Developmental Biology Animal Genetics and Genomics Animal Biochemistry Animal Physiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Developmental Biology Medicine |
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