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Biological Pathways, Candidate Genes, and Molecular Markers Associated with Quality-Of-Life Domains: an Update

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Biological Pathways, Candidate Genes, and Molecular Markers Associated with Quality-Of-Life Domains: an Update Qual Life Res (2014) 23:1997–2013 DOI 10.1007/s11136-014-0656-1 REVIEW Biological pathways, candidate genes, and molecular markers associated with quality-of-life domains: an update Mirjam A. G. Sprangers • Melissa S. Y. Thong • Meike Bartels • Andrea Barsevick • Juan Ordon˜ana • Qiuling Shi • Xin Shelley Wang • Pa˚l Klepstad • Eddy A. Wierenga • Jasvinder A. Singh • Jeff A. Sloan Accepted: 19 February 2014 / Published online: 7 March 2014 Ó Springer International Publishing Switzerland 2014 Abstract (depressed mood) and positive (well-being/happiness) Background There is compelling evidence of a genetic emotional functioning, social functioning, and overall foundation of patient-reported quality of life (QOL). Given QOL. the rapid development of substantial scientific advances in Methods We followed a purposeful search algorithm of this area of research, the current paper updates and extends existing literature to capture empirical papers investigating reviews published in 2010. the relationship between biological pathways and molecu- Objectives The objective was to provide an updated lar markers and the identified QOL domains. overview of the biological pathways, candidate genes, and Results Multiple major pathways are involved in each molecular markers involved in fatigue, pain, negative QOL domain. The inflammatory pathway has the strongest evidence as a controlling mechanism underlying fatigue. Inflammation and neurotransmission are key processes On behalf of the GeneQol Consortium. involved in pain perception, and the catechol-O-methyl- transferase (COMT) gene is associated with multiple sorts Electronic supplementary material The online version of this article (doi:10.1007/s11136-014-0656-1) contains supplementary of pain. The neurotransmitter and neuroplasticity theories material, which is available to authorized users. M. A. G. Sprangers (&) Á M. S. Y. Thong P. Klepstad Department of Medical Psychology/J3-211, Academic Medical Chair Department of Intensive Care Medicine, St. Olav Center, University of Amsterdam, Meibergdreef 15, University Hospital, Trondheim, Norway 1105 AZ Amsterdam, The Netherlands e-mail: [email protected] E. A. Wierenga Department of Cell Biology and Histology, Academic Medical M. S. Y. Thong Center, University of Amsterdam, Amsterdam, The Netherlands Center of Research on Psychology in Somatic diseases (CoRPS), Tilburg University, Tilburg, The Netherlands J. A. Singh Birmingham VA Medical Center, University of Alabama at M. Bartels Birmingham, Birmingham, AL, USA Department of Biological Psychology, VU University, Amsterdam, The Netherlands J. A. Singh Mayo Clinic College of Medicine, Rochester, MN, USA A. Barsevick Thomas Jefferson University, Philadelphia, PA, USA J. A. Sloan Section of Cancer Center Statistics, Division of Biomedical J. Ordon˜ana Statistics and Informatics, Department of Health Sciences, Mayo Department of Human Anatomy and Psychobiology, University Clinic, Rochester, MN, USA of Murcia, Murcia, Spain Q. Shi Á X. S. Wang Department of Symptom Research, MD Anderson Cancer Center, The University of Texas, Houston, TX, USA 123 1998 Qual Life Res (2014) 23:1997–2013 have the strongest evidence for their relationship with computerized literature search on PubMed for the years depression. Oxytocin-related genes and genes involved in November 2007–November 2012. However, we did not set a the serotonergic and dopaminergic pathways play a role in limitation on year of publication for overall QOL as the social functioning. Inflammatory pathways, via cytokines, GeneQol Consortium had not previously published a review also play an important role in overall QOL. on this subject. Due to the large number of hits on depression Conclusions Whereas the current findings need future and pain, up-to-date publications were limited to the last experiments and replication efforts, they will provide three years (2010–2012). Articles or book chapters found researchers supportive background information when through reference checking or personal communication embarking on studies relating candidate genes and/or (until June, 2013) were also included. molecular markers to QOL domains. The ultimate goal of Specific search terms are provided as supplementary this area of research is to enhance patients’ QOL. material (see Supplementary information 1). Empirical papers investigating the relationship between biological pathways/ Keywords Biological pathways Á Genes Á Molecular molecular markers and the following QOL domains were markers Á Quality of life Á Patient-reported outcomes included: fatigue, pain, emotional functioning (depression, (PROs) well-being/happiness), social functioning, and overall QOL. We limited our search to publications in English on human subjects. Introduction A gene or molecular marker is included if there is at least one publication (either empirical, meta-analysis or In 2004, empirical support was found for the provocative review) reporting its significant association with a QOL hypothesis that there is a genetic basis to patient-reported domain. The findings are provided in Tables 1, 2, 3, 4, 5, quality of life (QOL) [1]. In response to this preliminary and 6 for each QOL domain, respectively. References work [2], an international and interdisciplinary research included in the tables are provided as supplementary consortium (GeneQol) was formed to set out the state of information. The text will only elaborate on new infor- the science at that point and to design and implement a mation since our previous reviews. program of research [3]. A theoretical framework was The primary source for identifying the biological path- published to facilitate and focus the investigation into the ways was the KEGG website (Kyoto Encyclopedia for Genes biological foundation of self-perceived QOL [4]. and Genomes) (http://www.genome.jp/kegg/) and supple- Multiple publications and studies ensued laying the mented by Genecards website (http://www.genecards.org/). groundwork for methodological approaches and identifying candidate molecular markers, e.g., [5–7]. Replication of preliminary work has been seen alongside new markers [8]. Results Reviews documented the biological pathways and molecular markers that were found to be associated with QOL domains, Fatigue including the most prevalent symptoms pain [9] and fatigue [10], and emotional [11] and social functioning [12]. To the best of our knowledge, no genome-wide association As a result of this collective work, there is now com- studies (GWAS) on fatigue have been published to date. pelling evidence of a genetic foundation of QOL. Given the Several biological pathways show promise as underlying rapid development of substantial scientific advances in this mechanisms of fatigue: inflammation, serotonin, dopamine, area of research, the current paper updates and extends the and glutathione metabolic pathways [10, 13]. previous work. The objective was to provide an updated Saligan [14] synthesized the evidence for inflammatory overview of the biological pathways, candidate genes, and pathway involvement. In cross-sectional studies, various molecular markers for these domains and those for overall markers of immunity and inflammation obtained at various QOL. This information will provide researchers supportive time points from blood, plasma, serum or in vitro were background information when embarking on studies relat- inconsistent in predicting fatigue depending on the covar- ing candidate genes and/or molecular markers to QOL. iates included in the analysis [15]. In a small number of longitudinal studies, primarily in women with early-stage breast cancer, fatigue was associated with elevations in Methods immune response and inflammation. Significant associa- tions have also been demonstrated between fatigue and To provide an overview of the state of the science, we started genomic markers. Higher morning and evening fatigue in by including the references provided in our earlier reviews cancer patients and caregivers was found to be related to [2, 3, 9–12]. To update these references, we conducted a single nucleotide polymorphisms (SNPs) of the interleukin 123 Qual Life Res (2014) 23:1997–2013 1999 Table 1 Biological pathways, candidate genes, and molecular markers in fatigue Quality-of-life domains Biological pathwaysa Candidate genes Molecular markers Literature Fatigue [1] Serotonergic synapse/ TPH1 5-HT [2–5] metabolic pathway Dopaminergic synapse COMT, DRD4, DAT1 Cortisol [6, 7] Glutathione metabolic GSTZ1, ABCC4, DPYD, GSTP1, NR [8–10] pathway OPRT/UMPS Inflammation Cytokine–cytokine [11] receptor interaction Pro-inflammatory IL-1b,IL-6, TNF-a, CD19?b IL-1b, IL-6, TNF-a, [12–25] CD19?b, TNF-R1, Anti-inflammatory IL-1RN, IL-1Ra,IL-10 IL-1RN, IL-1Ra, IL-10 [13–15, 17] Immunity IL-2, IL-4, IL-5, IFN-c IL-2, IL-4, IL-5, IFN-c [12, 26] Cell migration CXCL9, CXCL11 CXCL9, CXCL11 [27] Inflammation CRP CRP, neopterin [4, 13] Cortisol production, serotonin HPA NR CRH, ACTH, cortisol, [28–31] dysregulation, catecholamine melatonin, norepinephrine, epinephrine Circadian rhythm disruption—i.e., SCN PER2, PER3, TIMELESS EGF, TGF-a, neuregulin-1, [28, through modulation of arousal and prokineticine-2, 32–37] sleep patterns cardiotrophin-like cytokine, PER2, PER3, cortisol, melatonin EGFR NR NR [28] Peripheral fatigue (muscle strength) Skeletal muscle NR ATP [37, 38] Vagal afferent nerve activation Cytokine–cytokine (suppress somatic muscle receptor interaction activity—‘sickness Pro-inflammatory IL-1, IL-6, TNF-a IL-1, IL-6, TNF-a [39] behavior’) References are included
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