Pharmacogenetic Determinants Of Treatment Response In Children
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- This is an observational study: the protocol does not assign a study treatment.
- Who it may be relevant to
- Registry conditions: All Malignancies, Children Being Treated for Catastrophic Illness. Basic parameters: No limits · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- United States
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
To investigate whether genetic polymorphisms in genes encoding proteins involved in the metabolism or effects of drugs or environmental agents influence the disposition or effects of these xenobiotic substrates. To investigate the nature of heritability and the genetic basis of pharmacogenetic traits by studying family members of individuals with specific genotypes.
Detailed description
Pharmacogenetics is that discipline devoted to elucidating the genetic determinants of drug response. Particularly in the area of drug metabolism, many genes exhibit genetic polymorphism; that is, a stable percentage of the population (which generally differs by ethnic group) is deficient in the functional expression of the enzyme involved, and the deficiency is typically inherited as an autosomal recessive trait. With currently known polymorphisms in drug metabolism, the percentage of homozygous deficient individuals ranges from 0.3% to as many as 90% of the population, depending on the enzyme and the ethnic group.
Our prior studies have revealed multigenic pharmacogenetic models that are significantly predictive of various drug response phenotypes (e.g., drug resistance, drug clearance, drug toxicity, disease response) in children with ALL. The large number of candidate loci and the relatively small number of patients illustrate the fact that larger sample sizes are required to definitively establish these polygenic models. The fact that there were significant race/genotype interactions, such that predictions differed in whites vs blacks, highlights the need for adequate numbers of patients within racial and ethnic groups to allow differential analysis of genotypic predictors after adjusting for confounding demographic factors in pharmacogenetic studies via stratified design and analyses.
Primary outcome measures
- To investigate whether genetic polymorphisms in genes encoding proteins involved in the metabolism or effects of drugs or environmental agents influence the disposition or effects of these xenobiotic substrates. [Time frame: 28 years]
Eligibility criteria
Inclusion criteria
- Any patients under evaluation/treatment at St. Jude Children's Research Hospital (SJCRH)
- Parents or family members of St. Jude patients
- Non patient volunteers
- All study subjects must provide informed consent for participation
- Assent/Consent of the patient (parent) must be provided prior to attempts made by investigators to enroll a family member of a SJCRH patient
Exclusion criteria
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Observational model
- Case-control
Study locations
United States · 1 center
- St. Jude Children's Research Hospital — Memphis
Identifiers
NCT: NCT00730678 · PGEN5 · R37CA036401 · P50GM115279 · R01CA036401 · R01GM118578 · R35GM141947 · R01CA264837 · NCI-2021-09904