Identification and replication of loci involved in camptothecin-induced cytotoxicity using CEPH pedigrees.
To date, the Centre d'Etude Polymorphism Humain (CEPH) cell line model has only been used as a pharmacogenomic tool to evaluate which genes are responsible for the disparity in response to a single drug. The purpose of this study was demonstrate the model's ability to establish a specific...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2011-05-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3088663?pdf=render |
| _version_ | 1819079983965929472 |
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| author | Venita Gresham Watson Alison Motsinger-Reif Nicholas E Hardison Eric J Peters Tammy M Havener Lorraine Everitt James Todd Auman Daniel L Comins Howard L McLeod |
| author_facet | Venita Gresham Watson Alison Motsinger-Reif Nicholas E Hardison Eric J Peters Tammy M Havener Lorraine Everitt James Todd Auman Daniel L Comins Howard L McLeod |
| author_sort | Venita Gresham Watson |
| collection | DOAJ |
| description | To date, the Centre d'Etude Polymorphism Humain (CEPH) cell line model has only been used as a pharmacogenomic tool to evaluate which genes are responsible for the disparity in response to a single drug. The purpose of this study was demonstrate the model's ability to establish a specific pattern of quantitative trait loci (QTL) related to a shared mechanism for multiple structurally related drugs, the camptothecins, which are Topoisomerase 1 inhibitors. A simultaneous screen of six camptothecin analogues for in vitro sensitivity in the CEPH cell lines resulted in cytotoxicity profiles and orders of potency which were in agreement with the literature. For all camptothecins studied, heritability estimates for cytotoxic response averaged 23.1 ± 2.6%. Nonparametric linkage analysis was used to identify a relationship between genetic markers and response to the camptothecins. Ten QTLs on chromosomes 1, 3, 5, 6, 11, 12, 16 and 20 were identified as shared by all six camptothecin analogues. In a separate validation experiment, nine of the ten QTLs were replicated at the significant and suggestive levels using three additional camptothecin analogues. To further refine this list of QTLs, another validation study was undertaken and seven of the nine QTLs were independently replicated for all nine camptothecin analogues. This is the first study using the CEPH cell lines that demonstrates that a specific pattern of QTLs could be established for a class of drugs which share a mechanism of action. Moreover, it is the first study to report replication of linkage results for drug-induced cytotoxicity using this model. The QTLs, which have been identified as shared by all camptothecins and replicated across multiple datasets, are of considerable interest; they harbor genes related to the shared mechanism of action for the camptothecins, which are responsible for variation in response. |
| first_indexed | 2024-12-21T19:37:40Z |
| format | Article |
| id | doaj.art-71b79f756d114691976e3037609f67c3 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-21T19:37:40Z |
| publishDate | 2011-05-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-71b79f756d114691976e3037609f67c32022-12-21T18:52:33ZengPublic Library of Science (PLoS)PLoS ONE1932-62032011-05-0165e1756110.1371/journal.pone.0017561Identification and replication of loci involved in camptothecin-induced cytotoxicity using CEPH pedigrees.Venita Gresham WatsonAlison Motsinger-ReifNicholas E HardisonEric J PetersTammy M HavenerLorraine EverittJames Todd AumanDaniel L CominsHoward L McLeodTo date, the Centre d'Etude Polymorphism Humain (CEPH) cell line model has only been used as a pharmacogenomic tool to evaluate which genes are responsible for the disparity in response to a single drug. The purpose of this study was demonstrate the model's ability to establish a specific pattern of quantitative trait loci (QTL) related to a shared mechanism for multiple structurally related drugs, the camptothecins, which are Topoisomerase 1 inhibitors. A simultaneous screen of six camptothecin analogues for in vitro sensitivity in the CEPH cell lines resulted in cytotoxicity profiles and orders of potency which were in agreement with the literature. For all camptothecins studied, heritability estimates for cytotoxic response averaged 23.1 ± 2.6%. Nonparametric linkage analysis was used to identify a relationship between genetic markers and response to the camptothecins. Ten QTLs on chromosomes 1, 3, 5, 6, 11, 12, 16 and 20 were identified as shared by all six camptothecin analogues. In a separate validation experiment, nine of the ten QTLs were replicated at the significant and suggestive levels using three additional camptothecin analogues. To further refine this list of QTLs, another validation study was undertaken and seven of the nine QTLs were independently replicated for all nine camptothecin analogues. This is the first study using the CEPH cell lines that demonstrates that a specific pattern of QTLs could be established for a class of drugs which share a mechanism of action. Moreover, it is the first study to report replication of linkage results for drug-induced cytotoxicity using this model. The QTLs, which have been identified as shared by all camptothecins and replicated across multiple datasets, are of considerable interest; they harbor genes related to the shared mechanism of action for the camptothecins, which are responsible for variation in response.http://europepmc.org/articles/PMC3088663?pdf=render |
| spellingShingle | Venita Gresham Watson Alison Motsinger-Reif Nicholas E Hardison Eric J Peters Tammy M Havener Lorraine Everitt James Todd Auman Daniel L Comins Howard L McLeod Identification and replication of loci involved in camptothecin-induced cytotoxicity using CEPH pedigrees. PLoS ONE |
| title | Identification and replication of loci involved in camptothecin-induced cytotoxicity using CEPH pedigrees. |
| title_full | Identification and replication of loci involved in camptothecin-induced cytotoxicity using CEPH pedigrees. |
| title_fullStr | Identification and replication of loci involved in camptothecin-induced cytotoxicity using CEPH pedigrees. |
| title_full_unstemmed | Identification and replication of loci involved in camptothecin-induced cytotoxicity using CEPH pedigrees. |
| title_short | Identification and replication of loci involved in camptothecin-induced cytotoxicity using CEPH pedigrees. |
| title_sort | identification and replication of loci involved in camptothecin induced cytotoxicity using ceph pedigrees |
| url | http://europepmc.org/articles/PMC3088663?pdf=render |
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