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Genome-wide association study of café-au-lait macule number in neurofibromatosis type 1

  1. Author:
    Sung, Heejong [ORCID]
    Hyland, Paula L
    Pemov, Alexander [ORCID]
    Sabourin, Jeremy A
    Baldwin, Andrea M
    Bass,Sara
    Teshome,Kedest
    Luo,Wen
    Widemann, Brigitte C
    Stewart, Douglas R [ORCID]
    Wilson, Alexander F

  2. Author Address

    Genometrics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Baltimore, MD, USA., Integrative Tumor Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD, USA., Division of Applied Regulatory Science, Office of Translational Science, Center for Drug Evaluation & Research, U.S. Food and Drug Administration, Silver Spring, MD, USA., Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD, USA., Pediatric Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA., Frederick National Laboratory for Cancer Research, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD, USA.,
    1. Year: 2020
    2. Date: Aug 31
    3. Epub Date: 2020 08 31
  2. Journal: Molecular genetics & genomic medicine
    1. Pages: e1400
  4. Type of Article: Article
  5. Article Number: e1400
  6. ISSN: 2324-9269
  1. Abstract:

    Background: Neurofibromatosis type 1 (NF1) is a tumor-predisposition disorder that arises due to pathogenic variants in tumor suppressor NF1. NF1 has variable expressivity that may be due, at least in part, from heritable elements such as modifier genes; however, few genetic modifiers have been identified to date. Methods: In this study, we performed a genome-wide association analysis of the number of café-au-lait macules (CALM) that are considered a tumor-like trait as a clinical phenotype modifying NF1. Results: A borderline genome-wide significant association was identified in the discovery cohort (CALM1, N = 112) between CALM number and rs12190451 (and rs3799603, r2 = 1.0; p = 7.4 × 10-8 ) in the intronic region of RPS6KA2. Although, this association was not replicated in the second cohort (CALM2, N = 59) and a meta-analysis did not show significantly associated variants in this region, a significant corroboration score (0.72) was obtained for the RPS6KA2 signal in the discovery cohort (CALM1) using Complementary Pairs Stability Selection for Genome-Wide Association Studies (ComPaSS-GWAS) analysis, suggesting that the lack of replication may be due to heterogeneity of the cohorts rather than type I error. Conclusion: rs12190451 is located in a melanocyte-specific enhancer and may influence RPS6KA2 expression in melanocytes-warranting further functional studies. Keywords: café-au-lait macule; complementary pairs stability selection for genome-wide association studies analysis; genetic modifiers; genome-wide association study; neurofibromatosis type 1. © Published 2020. This article is a U.S. Government work and is in the public domain in the USA. Molecular Genetics & Genomic Medicine published by Wiley Periodicals LLC.

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External Sources

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  2. DOI: 10.1002/mgg3.1400
  3. PMID: 32869517
  4. View record in Web of Science®
  5. WOS: 000564567500001

Library Notes

  1. Fiscal Year: FY2019-2020
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