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Goldwater DS, Leng M, Karlamangla A, Seeman T, Elashoff D, Wanagat JM, Reuben DB, Lindman BR, Cole S. Baseline pro-inflammatory gene expression in whole blood is related to adverse long-term outcomes after transcatheter aortic valve replacement: a case control study. BMC Cardiovasc Disord 2021; 21:368. [PMID: 34340660 PMCID: PMC8327421 DOI: 10.1186/s12872-021-02186-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 04/02/2021] [Accepted: 07/28/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Age-associated inflammation and immune system dysfunction have been implicated as mechanisms that increase risk for adverse long-term procedural outcomes in older adults. The purpose of this study was to investigate relationships between baseline inflammatory and innate antiviral gene expression and outcomes after transcatheter aortic valve replacement (TAVR) in older adults with severe aortic stenosis. METHODS We performed a retrospective case-control study comparing pre-procedural pro-inflammatory and Type 1 interferon (IFN) gene expression in 48 controls with favorable outcomes (alive 1 year after TAVR with improved quality of life [QoL]) versus 48 individuals with unfavorable outcomes (dead by 1 year or alive at 1 year but with reduced QoL). Gene expression was evaluated in whole blood via (1) pre-defined composite scores of 19 inflammation-associated genes and 34 Type I IFN response genes, and (2) pro-inflammatory and antiviral transcription factor activity inferred from promotor based bioinformatics analyses of genes showing > 25% difference in average expression levels across groups. All analyses were adjusted for age, gender, body mass index, diabetes, immunosuppression, cardiovascular disease (CVD), and frailty. RESULTS Relative to controls, those with unfavorable outcomes demonstrated higher expression of the pro-inflammatory gene composite prior to TAVR (p < 0.01) and bioinformatic indicators of elevated Nuclear Factor kB (p < 0.001) and Activator Protein 1 (p < 0.001) transcription factor activity, but no significant differences in Type I IFN-related gene expression. CONCLUSIONS These results demonstrate that a pro-inflammatory state prior to TAVR, independent of CVD severity and frailty status, is associated with worse long-term procedural outcomes.
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Affiliation(s)
- Deena S Goldwater
- Division of Cardiology, Department of Medicine, University of California, Los Angeles, CA, USA. .,Division of Geriatrics, Department of Medicine, University of California, Los Angeles, CA, USA.
| | - Mei Leng
- Department of Biostatistics, University of California, Los Angeles, CA, USA
| | - Arun Karlamangla
- Division of Geriatrics, Department of Medicine, University of California, Los Angeles, CA, USA
| | - Teresa Seeman
- Division of Geriatrics, Department of Medicine, University of California, Los Angeles, CA, USA
| | - David Elashoff
- Department of Biostatistics, University of California, Los Angeles, CA, USA
| | - Jonathan M Wanagat
- Division of Geriatrics, Department of Medicine, University of California, Los Angeles, CA, USA.,Veterans Administration Greater Los Angeles Healthcare System, Los Angeles, CA, USA
| | - David B Reuben
- Division of Geriatrics, Department of Medicine, University of California, Los Angeles, CA, USA
| | - Brian R Lindman
- Structural Heart and Valve Center, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Steve Cole
- Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA, USA
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