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- Title
Gastrointestinal Symptom Cluster is Associated With Epigenetic Regulation of Lymphotoxin Beta in Oncology Patients Receiving Chemotherapy.
- Authors
Harris, Carolyn S.; Miaskowski, Christine A.; Conley, Yvette P.; Hammer, Marilyn J.; Dhruva, Anand A.; Levine, Jon D.; Olshen, Adam B.; Kober, Kord M.
- Abstract
Objectives: While the gastrointestinal symptom cluster (GISC) is common in patients receiving chemotherapy, limited information is available on its underlying mechanism(s). Emerging evidence suggests a role for inflammatory processes through the actions of the nuclear factor kappa B (NF-κB) signaling pathway. This study evaluated for associations between a GISC and levels of DNA methylation for genes within this pathway. Methods: Prior to their second or third cycle of chemotherapy, 1071 outpatients reported symptom occurrence using the Memorial Symptom Assessment Scale. A GISC was identified using exploratory factor analysis. Differential methylation analyses were performed in two independent samples using EPIC (n = 925) and 450K (n = 146) microarrays. Trans expression-associated CpG (eCpG) loci for 56 NF-κB signaling pathway genes were evaluated. Loci significance were assessed using an exploratory false discovery rate (FDR) of 25% for the EPIC sample. For the validation assessment using the 450K sample, significance was assessed at an unadjusted p -value of 0.05. Results: For the EPIC sample, the GISC was associated with increased expression of lymphotoxin beta (LTB) at one differentially methylated trans eCpG locus (cg03171795; FDR = 0.168). This association was not validated in the 450K sample. Conclusions: This study is the first to identify an association between a GISC and epigenetic regulation of a gene that is involved in the initiation of gastrointestinal immune responses. Findings suggest that increased LTB expression by hypermethylation of a trans eCpG locus is involved in the occurrence of this cluster in patients receiving chemotherapy. LTB may be a potential therapeutic target for this common cluster.
- Subjects
RESEARCH; NAUSEA; CANCER chemotherapy; INFLAMMATION; GASTROINTESTINAL diseases; ACQUISITION of data; MICROARRAY technology; CANCER patients; DNA methylation; CELLULAR signal transduction; GENE expression; TUMOR necrosis factors; FACTOR analysis; MEDICAL records; DESCRIPTIVE statistics; RESEARCH funding; KARNOFSKY Performance Status; MOLECULAR structure; DATA analysis software; EPIGENOMICS; COMORBIDITY; SYMPTOMS
- Publication
Biological Research for Nursing, 2023, Vol 25, Issue 1, p51
- ISSN
1099-8004
- Publication type
Article
- DOI
10.1177/10998004221115863