1H Nuclear Magnetic Resonance (NMR) Metabolomic Study of Chronic Organophosphate Exposure in Rats
1H NMR spectroscopy and chemometric analysis were used to characterize rat urine obtained after chronic exposure to either tributyl phosphate (TBP) or triphenyl phosphate (TPP). In this study, the daily dose exposure was 1.5 mg/kg body weight for TBP, or 2.0 mg/kg body weight for TPP, administered o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2012-07-01
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| Series: | Metabolites |
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| Online Access: | http://www.mdpi.com/2218-1989/2/3/479 |
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| author | Todd M. Alam Muniasamy Neerathilingam M. Kathleen Alam David E. Volk G. A. Shakeel Ansari Swapna Sarkar Bruce A. Luxon |
| author_facet | Todd M. Alam Muniasamy Neerathilingam M. Kathleen Alam David E. Volk G. A. Shakeel Ansari Swapna Sarkar Bruce A. Luxon |
| author_sort | Todd M. Alam |
| collection | DOAJ |
| description | 1H NMR spectroscopy and chemometric analysis were used to characterize rat urine obtained after chronic exposure to either tributyl phosphate (TBP) or triphenyl phosphate (TPP). In this study, the daily dose exposure was 1.5 mg/kg body weight for TBP, or 2.0 mg/kg body weight for TPP, administered over a 15-week period. Orthogonal signal correction (OSC) -filtered partial least square discriminant analysis (OSC-PLSDA) was used to predict and classify exposure to these organophosphates. During the development of the model, the classification error was evaluated as a function of the number of latent variables. NMR spectral regions and corresponding metabolites important for determination of exposure type were identified using variable importance in projection (VIP) coefficients obtained from the OSC-PLSDA analysis. As expected, the model for classification of chronic (1.5–2.0 mg/kg body weight daily) TBP or TPP exposure was not as strong as the previously reported model developed for identifying acute (15–20 mg/kg body weight) exposure. The set of majorly impacted metabolites identified for chronic TBP or TPP exposure was slightly different than those metabolites previously identified for acute exposure. These metabolites were then mapped to different metabolite pathways and ranked, allowing the metabolic response to chronic organophosphate exposure to be addressed. |
| first_indexed | 2024-04-13T15:03:46Z |
| format | Article |
| id | doaj.art-d082fa76249b4f4badb9798197604864 |
| institution | Directory Open Access Journal |
| issn | 2218-1989 |
| language | English |
| last_indexed | 2024-04-13T15:03:46Z |
| publishDate | 2012-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metabolites |
| spelling | doaj.art-d082fa76249b4f4badb97981976048642022-12-22T02:42:14ZengMDPI AGMetabolites2218-19892012-07-012347949510.3390/metabo20304791H Nuclear Magnetic Resonance (NMR) Metabolomic Study of Chronic Organophosphate Exposure in RatsTodd M. AlamMuniasamy NeerathilingamM. Kathleen AlamDavid E. VolkG. A. Shakeel AnsariSwapna SarkarBruce A. Luxon1H NMR spectroscopy and chemometric analysis were used to characterize rat urine obtained after chronic exposure to either tributyl phosphate (TBP) or triphenyl phosphate (TPP). In this study, the daily dose exposure was 1.5 mg/kg body weight for TBP, or 2.0 mg/kg body weight for TPP, administered over a 15-week period. Orthogonal signal correction (OSC) -filtered partial least square discriminant analysis (OSC-PLSDA) was used to predict and classify exposure to these organophosphates. During the development of the model, the classification error was evaluated as a function of the number of latent variables. NMR spectral regions and corresponding metabolites important for determination of exposure type were identified using variable importance in projection (VIP) coefficients obtained from the OSC-PLSDA analysis. As expected, the model for classification of chronic (1.5–2.0 mg/kg body weight daily) TBP or TPP exposure was not as strong as the previously reported model developed for identifying acute (15–20 mg/kg body weight) exposure. The set of majorly impacted metabolites identified for chronic TBP or TPP exposure was slightly different than those metabolites previously identified for acute exposure. These metabolites were then mapped to different metabolite pathways and ranked, allowing the metabolic response to chronic organophosphate exposure to be addressed.http://www.mdpi.com/2218-1989/2/3/479NMRmetabolomicstributyl phosphate, triphenyl phosphate, chemometrics |
| spellingShingle | Todd M. Alam Muniasamy Neerathilingam M. Kathleen Alam David E. Volk G. A. Shakeel Ansari Swapna Sarkar Bruce A. Luxon 1H Nuclear Magnetic Resonance (NMR) Metabolomic Study of Chronic Organophosphate Exposure in Rats Metabolites NMR metabolomics tributyl phosphate, triphenyl phosphate, chemometrics |
| title | 1H Nuclear Magnetic Resonance (NMR) Metabolomic Study of Chronic Organophosphate Exposure in Rats |
| title_full | 1H Nuclear Magnetic Resonance (NMR) Metabolomic Study of Chronic Organophosphate Exposure in Rats |
| title_fullStr | 1H Nuclear Magnetic Resonance (NMR) Metabolomic Study of Chronic Organophosphate Exposure in Rats |
| title_full_unstemmed | 1H Nuclear Magnetic Resonance (NMR) Metabolomic Study of Chronic Organophosphate Exposure in Rats |
| title_short | 1H Nuclear Magnetic Resonance (NMR) Metabolomic Study of Chronic Organophosphate Exposure in Rats |
| title_sort | 1h nuclear magnetic resonance nmr metabolomic study of chronic organophosphate exposure in rats |
| topic | NMR metabolomics tributyl phosphate, triphenyl phosphate, chemometrics |
| url | http://www.mdpi.com/2218-1989/2/3/479 |
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