癌症患者通常会受到疲劳的影响。在此，我们试图检查头颈癌 (HNC) 治疗期间和治疗后患者外周血中与疲劳相关的表观遗传修饰（即 DNA 甲基化）。此外，我们还确定了这些修饰是否与基因表达和炎症蛋白标记物相关，我们之前已将其与 HNC 的疲劳联系起来。这项前瞻性纵向研究纳入了符合条件的患者，并在放疗前、放疗结束以及放疗后六个月和一年时收集了数据。患者使用多维疲劳量表 (MFI)-20 报告疲劳数据。 DNA 甲基化 (Illumina MmethylationEPIC) 和基因表达 (Applied Biosystems Clariom S) 芯片和七种炎症标记物 (R

Cancer patients are commonly affected by fatigue. Herein, we sought to examine epigenetic modifications (i.e., DNA methylation) related to fatigue in peripheral blood among patients during and after treatment for head and neck cancer (HNC). Further, we determined whether these modifications were associated with gene expression and inflammatory protein markers, which we have previously linked to fatigue in HNC. This prospective, longitudinal study enrolled eligible patients with data collected at pre-radiotherapy, end of radiotherapy, and six months and one-year post-radiotherapy. Fatigue data were reported by patients using the Multidimensional Fatigue Inventory (MFI)-20. DNA methylation (Illumina MethylationEPIC) and gene expression (Applied Biosystems Clariom S) arrays and assays for seven inflammatory markers (R&D Systems multiplex) were performed. Mixed models and enrichment analyses were applied to establish the associations. A total of 386 methylation loci were associated with fatigue among 145 patients (False Discovery Rate [FDR] < 0.05). Enrichment analyses showed the involvement of genes related to immune and inflammatory responses, insulin and lipid metabolism, neuropsychological disorders, and tumors. We further identified 16 methylation-gene expression pairs (FDR < 0.05), which were linked to immune and inflammatory responses and lipid metabolism. Ninety-one percent (351) of the 386 methylation loci were also significantly associated with inflammatory markers (e.g., interleukin 6, c-reactive protein; FDR < 0.05), which further mediated the association between methylation and fatigue (FDR < 0.05). These data suggest that epigenetic modifications associated with inflammation and immunometabolism, in conjunction with relevant gene expression and protein markers, are potential targets for treating fatigue in HNC patients. The findings also merit future prospective studies in other cancer populations as well as interventional investigations.© 2024. The Author(s), under exclusive licence to Springer Nature Limited.