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Individual Dosage Selection of Irinotecan (CPT-11) Based on UGT1A1 Genotype in Metastatic Colorectal Cancer Patients

ABSTRACT: The purpose of this study is to investigate the influence of dose selection of CPT-11 on toxicity, response and pharmacokinetics according to UGT1A1 genotype in colorectal cancer patients.

DISEASE(S): Metastatic Colorectal Cancer,Colorectal Cancer,Colorectal Neoplasms

PROVIDER: 2119625 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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A genotype directed dose-finding study of Irinotecan (CPT-11) by groups of Uridine diphosphate glucuronosyltransferase 1A1 (UGT1A1) polymorphisms in patients with advanced metastatic colorectal cancer and gastric cancer.

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A feasibility study of Irinotecan (CPT-11) by groups of Uridine diphosphate glucuronosyltransferase 1A1 (UGT1A1) polymorphisms in patients with metastatic colorectal cancer.

Project description:Interventions: Patients receive FOLFIRI with bevacizumab fixed 5mg/kg. (Treatment will be continued unless the disease progression, unacceptable toxicity, or consent withdrawal.) Definision of UGT1A1 polymorphisms groups: The homozygous group is patient with homozygous genotype of UGT1A1*28/*28 or UGT1A1*6/*6, with combined heterozygous genotypes of UGT1A1*28 and UGT1A1*6. The heterozygous group is patient with heterozygous genotype of either UGT1A1*28 or UGT1A1*6. The wild group is patients with no UGT1A1*28 and UGT1A1*6 mutation. CPT-11 dosage is wild and heterozygous:CPT-11 150mg/m2 homozygous:CPT-11 100mg/m2 Primary outcome(s): 1)incidence of adverse events 2)frequency of severe toxicity Study Design: Single arm Non-randomized

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Pharmacogenomic Study for Individual Response to CPT-11 in Colorectal Cancer Patients (Step 2)

Project description:Interventions: Intravenous adminstration of CPT-11 100 mg/m2 on Days 1, 8, and 15, every 4 weeks Primary outcome(s): 1)Tumor response rate 2)Genotype-phenotype association (CYP3A4,CES1,2, UGT1A1, ABCG2, ABCB1, and ABCC1,2 vs toxicity), mutation -phenotype association (TOP1A, ABCG2 vs tumor response), and expression-phenotype association (TOP1A, ABCG2 vs tumor response) Study Design: Single arm Non-randomized

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An Observational Study of CPT-11 Based Regimens and UGT1A1 Genotypes in Metastatic Colorectal Cancer (mCRC)

Project description:The purpose of this study is to examine the correlation between UGT1A1 genotypes and the efficacy of CPT-11 based regimens (FOLFIRI, CPT-11+S-1, CPT-11) for patients with metastatic colorectal cancer.

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Study the relationship between UGT1A1, MTHFR gene polymorphism and colorectal cancer chemotherapy sensitivity

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Triclosan administration to humanized UDP-glucuronosyltransferase 1 neonatal mice induces UGT1A1 through a dependence on PPARα and ATF4

Project description:Triclosan (TCS) is an antimicrobial toxicant found in a myriad of consumer products and has been detected in human tissues, including breastmilk. We have evaluated the impact of lactational TCS on UDP-glucuronosyltransferase 1A1 (UGT1A1) expression and bilirubin metabolism in humanized UGT1 (hUGT1) neonatal mice. In hUGT1 mice, expression of the hepatic UGT1A1 gene is developmentally delayed resulting in elevated total serum bilirubin (TSB) levels. We found that newborn hUGT1 mice breastfed or orally treated with TCS presented lower TSB levels along with induction of hepatic UGT1A1. Lactational and oral treatment by gavage with TCS leads to the activation of hepatic nuclear receptors CAR, PPARα, and stress sensor, ATF4. When CAR-deficient hUGT1 mice (hUGT1/Car-/-) were treated with TCS, TSB levels were reduced with a robust induction of hepatic UGT1A1, leaving us to conclude that CAR is not tied to UGT1A1 induction. Alternatively, when PPAR-deficient hUGT1 mice (hUGT1/Ppar-/-) were treated with TCS, hepatic UGT1A1 was not induced. Additionally, we had previously demonstrated that TCS is a potent inducer of ATF4, a transcriptional factor linked to the integrated stress response. When ATF4 was deleted in liver of hUGT1 mice (hUGT1/Atf4∆Hep), and these mice treated with TCS, we observed superinduction of hepatic UGT1A1. Oxidative stress genes in livers of hUGT1/Atf4∆Hep treated with TCS were increased, suggesting that ATF4 protects liver from excessive oxidative stress. The increase oxidative stress may be associated with superinduction of UGT1A1. The expression of ATF4 in neonatal hUGT1 hepatic tissue may play a role in the developmental repression of UGT1A1.

2024-04-24 | GSE264293 | GEO

GENOCARE: A Prospective, Randomized Clinical Trial of Genotype-Guided Dosing Versus Usual Care

Project description:This is a prospective, randomized study designed to compare genotype-guided dosing to usual care in patients with pancreas cancer and colorectal cancer who are UGT1A1 intermediate metabolizers (*1/*28) (heterozygotes) and usual UGT metabolizers (*1/*1). All patients will be assessed for UGT1A1 genotype at screening and those with intermediate or usual UGT1A1 genotypes (*1/*28, *1/*1) will be randomized to genotype-guided dosing versus usual care.

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Transcription profiling of topoisomerase I inhibitor irinotecan (CPT-11) sensitive, resistant, and reverted human neuroblastomas

Project description:We have established a neuroblastoma model resistant in vivo to the topoisomerase I inhibitor irinotecan (CPT-11, Camptothecin-11, CAMPTOSAR®) in order to study resistance to these agents acquired in a therapeutic setting. Common mechanisms of resistance were not involved in this model and we thus explored the gene expression signature associated with resistance by comparing the transcriptomes of sensitive, resistant, and reverted tumours using high-throughput DNA microarrays.

2008-01-26 | E-TABM-211 | biostudies-arrayexpress

Transcriptome analysis of novel CPT-CEF-treated HT29 colon cancer cells to evaluate drug cytotoxicity

Project description:Purpose: To identify differentially expressed genes in HT29 colon cancer cells after treatment with a novel formulation of camptothecin with β-cyclodextrin-EDTA-Fe3O4 nanoparticle-conjugated nanocarriers (CPT-CEF) Methods:Treated HT29 cell lines with CPT-CEF, isolated total RNA from HT29 colon cancer cells, and prepared library for RNA sequencing. Carried out comparative transcriptomic studies between treated and untreated cells to find out which gene functions were dysregulated by CPT-CEF. Results: The study yielded 247 DEGs ((FDR<0.05, FC>2.0) that were affected by CPT-CEF treatment in the HT29 colon cancer cells. The results obtained from cell cycle analysis, mitochondrial depolarization assay and acridium orange/propidium iodide double staining showed potential of CPT-CEF in cancer cell inhibition. Conclusion: Our study successfully identified DEGs in the CPT-CEF treated HT29 colon cancer cells that pointed to inhibition of cancer progression. To further affirm, animal studies are needed.

2021-09-15 | GSE165875 | GEO

Transcription profiling of Zea mays embryos under camptothecin (CPT) treatment.

Project description:Camptothecin (CPT) is a plant alkaloid that specifically binds topoisomerase I (Topo I) inhibiting its activity and inducing double stranded breaks in the DNA, activating the genotoxic cell responses, and ultimately, it might trigger programmed cell death (PCD). We used microarrays to detail the changes in gene expression during as a consequence of CPT treatment in maize immature embryos. In four independent experiments immature embryos were plated on MS medium supplemented with 50 uM CPT and incubated during three days. Untreated embryos incubated on MS medium were used as controls.

2010-11-01 | E-MEXP-2702 | biostudies-arrayexpress

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