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Graham C, Chooniedass R, Stefura WP, Lotoski L, Lopez P, Befus AD, Becker AB, HayGlass KT. Stability of pro- and anti-inflammatory immune biomarkers for human cohort studies. J Transl Med 2017; 15:53. [PMID: 28253888 PMCID: PMC5335797 DOI: 10.1186/s12967-017-1154-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 02/21/2017] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Although discovery research has identified the importance of dozens of pro- and anti-inflammatory immune mediators in the pathogenesis, maintenance, exacerbation and resolution of inflammatory diseases, most human cohort studies have incorporated few or no immunological intermediate phenotypes in their analyses. Significant hindrances have been (1) the limited panel of biomarkers known to be readily detected in healthy human populations and (2) the stability, hence utility, of such biomarkers to repeated analysis. METHODS The frequency and stability of 14 plasma biomarkers linked to in vivo immune regulation of allergic and autoimmune inflammatory disorders was determined in 140 healthy pediatric and adult participants. The impact of initial and multiple subsequent freeze/thaw cycles on pro-inflammatory (CCL2, CXCL10, IL-18, TNFα, IL-6), anti-inflammatory (IL-10, sTNF-RII, IL-1Ra), acute phase proteins (CRP, PTX3) and other biomarkers (sST2, IL-1RAcP) was subsequently quantified. RESULTS Multiple biomarkers capable of providing an innate immune signature of inflammation were readily detected directly ex vivo in healthy individuals. These biomarker levels were unaffected when comparing paired data sets from freshly obtained, never frozen plasma or serum and matched aliquots despite extensive freeze/thaw cycles. Neither age nor sex affected stability. Similarly, no quantitative differences were found following repetitive analysis of inflammatory biomarkers in culture samples obtained following in vitro stimulation with TLR and RLR ligands. CONCLUSIONS A broad panel of in vivo and ex vivo cytokine, chemokine and acute phase protein biomarkers that have been linked to human chronic inflammatory disorders are readily detected in vivo and remain stable for analysis despite multiple freeze thaw cycles. These data provide the foundation and confidence for large scale analyses of panels of inflammatory biomarkers to provide better understanding of immunological mechanisms underlying health versus disease.
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Affiliation(s)
- C Graham
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - R Chooniedass
- Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, MB, Canada
| | - W P Stefura
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - L Lotoski
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada.,Community Health and Epidemiology-Saskatchewan Population Health and Evaluation Research Unit, University of Saskatchewan, Saskatoon, SK, Canada
| | - P Lopez
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - A D Befus
- Division of Pulmonary Medicine, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - A B Becker
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada.,Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, MB, Canada.,Children's Hospital Research Institute of Manitoba, Winnipeg, MB, Canada
| | - K T HayGlass
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada. .,Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, MB, Canada. .,Children's Hospital Research Institute of Manitoba, Winnipeg, MB, Canada.
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Moraes TJ, Lefebvre DL, Chooniedass R, Becker AB, Brook JR, Denburg J, HayGlass KT, Hegele RG, Kollmann TR, Macri J, Mandhane PJ, Scott JA, Subbarao P, Takaro TK, Turvey SE, Duncan JD, Sears MR, Befus AD. The Canadian healthy infant longitudinal development birth cohort study: biological samples and biobanking. Paediatr Perinat Epidemiol 2015; 29:84-92. [PMID: 25405552 DOI: 10.1111/ppe.12161] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND It is hypothesised that complex interactions between genetic and environmental factors give rise to allergy and asthma in childhood. The Canadian Healthy Infant Longitudinal Development (CHILD) study was designed to explore these factors. METHODS CHILD is a longitudinal, general population birth cohort study following infants from mid-pregnancy to age 5 years. Over this time period, biological samples, questionnaires, clinical measures and environmental data are collected. RESULTS A total of 3624 families have been recruited, and many thousands of samples and questionnaires have been collected, annotated, and archived. This report outlines the rationale and methodology for collecting and storing diverse biological samples from parents and children in this study, and the mechanisms for their release for analyses. CONCLUSIONS The CHILD sample and data repository is a tremendous current and future resource and will provide a wealth of information not only informing studies of asthma and allergy, but also potentially in many other aspects of health relevant for Canadian infants and children.
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Affiliation(s)
- T J Moraes
- Physiology and Experimental Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada; Department of Paediatrics, University of Toronto, Toronto, ON, Canada
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HayGlass K, Xie J, Chooniedass R, Becker A, Simons E. IL-33 Is Produced And Responded To At Elevated Levels In Peanut Allergic Humans. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chooniedass R, Rabbani R, Liem J, Becker A. The Risk of Asthma in Children Sensitized to Alternaria. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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