2
|
Ramanan VK, Risacher SL, Nho K, Kim S, Shen L, McDonald BC, Yoder KK, Hutchins GD, West JD, Tallman EF, Gao S, Foroud TM, Farlow MR, De Jager PL, Bennett DA, Aisen PS, Petersen RC, Jack CR, Toga AW, Green RC, Jagust WJ, Weiner MW, Saykin AJ. GWAS of longitudinal amyloid accumulation on 18F-florbetapir PET in Alzheimer's disease implicates microglial activation gene IL1RAP. Brain 2015; 138:3076-88. [PMID: 26268530 PMCID: PMC4671479 DOI: 10.1093/brain/awv231] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 06/24/2015] [Indexed: 12/30/2022] Open
Abstract
Brain amyloid deposition is thought to be a seminal event in Alzheimer's disease. To identify genes influencing Alzheimer's disease pathogenesis, we performed a genome-wide association study of longitudinal change in brain amyloid burden measured by (18)F-florbetapir PET. A novel association with higher rates of amyloid accumulation independent from APOE (apolipoprotein E) ε4 status was identified in IL1RAP (interleukin-1 receptor accessory protein; rs12053868-G; P = 1.38 × 10(-9)) and was validated by deep sequencing. IL1RAP rs12053868-G carriers were more likely to progress from mild cognitive impairment to Alzheimer's disease and exhibited greater longitudinal temporal cortex atrophy on MRI. In independent cohorts rs12053868-G was associated with accelerated cognitive decline and lower cortical (11)C-PBR28 PET signal, a marker of microglial activation. These results suggest a crucial role of activated microglia in limiting amyloid accumulation and nominate the IL-1/IL1RAP pathway as a potential target for modulating this process.
Collapse
Affiliation(s)
- Vijay K Ramanan
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA,4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Shannon L. Risacher
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA,4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Kwangsik Nho
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA,4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA,5 Centre for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Sungeun Kim
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA,4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA,5 Centre for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Li Shen
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA,4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA,5 Centre for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Brenna C. McDonald
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA,4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA,6 Department of Neurology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Karmen K. Yoder
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Gary D. Hutchins
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - John D. West
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Eileen F. Tallman
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Sujuan Gao
- 4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA,7 Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Tatiana M. Foroud
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA,4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA,5 Centre for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Martin R. Farlow
- 4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA,6 Department of Neurology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Philip L. De Jager
- 8 Program in Translational NeuroPsychiatric Genomics, Institute for the Neurosciences, Brigham and Women’s Hospital, Boston, MA 02115, USA,9 Departments of Neurology and Psychiatry, Harvard Medical School, Boston, MA 02115, USA,10 Program in Medical and Population Genetics, Broad Institute, Cambridge, MA 02142, USA
| | - David A. Bennett
- 11 Rush Alzheimer’s Disease Centre, Rush University Medical Centre, Chicago, IL 60612, USA
| | - Paul S. Aisen
- 12 University of Southern California Alzheimer's Therapeutic Research Institute, San Diego, CA 92121, USA
| | - Ronald C. Petersen
- 13 Department of Neurology, Mayo Clinic Minnesota, Rochester, MN 55905, USA
| | - Clifford R. Jack
- 14 Department of Radiology, Mayo Clinic Minnesota, Rochester, MN 55905, USA
| | - Arthur W. Toga
- 15 Laboratory of NeuroImaging, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Robert C. Green
- 16 Division of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - William J. Jagust
- 17 Department of Neurology, University of California, Berkeley, CA 94720, USA
| | - Michael W. Weiner
- 18 Departments of Radiology, Medicine, and Psychiatry, University of California-San Francisco, San Francisco, CA 94143, USA,19 Department of Veterans Affairs Medical Centre, San Francisco, CA 94121, USA
| | - Andrew J. Saykin
- 1 Centre for Neuroimaging, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA,4 Indiana Alzheimer Disease Centre, Indiana University School of Medicine, Indianapolis, IN 46202, USA,5 Centre for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | | |
Collapse
|