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Epigenetic Signatures of Salivary Gland Inflammation in Sjögren's Syndrome.

ABSTRACT: Genome wide DNA methylation profiling of human labial salivary gland (LSG) biopsy samples obtained from 28 female members of the Sjögren's International Collaborative Clinical Alliance (SICCA) Registry. The Illumina HumanMethylation450 BeadChip platform was used to obtain DNA methylation profiles across more than 450,000 highly informative CpG sites. Samples included 15 non-case glands, and 13 glands from patients with Sjögren's Syndrome.

OTHER RELATED OMICS DATASETS IN: PRJNA432548

ORGANISM(S): Homo sapiens

PROVIDER: GSE110007 | GEO | 2018/02/02

REPOSITORIES: GEO

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Project description:The Sjögren's International Collaborative Clinical Alliance (SICCA) is a multisite observational cohort study that recruited a large cohort of geographically diverse participants. Enrollment of participants began in late 2004 at five (one domestic and four international) sites, in which all groups used the same protocol-directed methods to provide uniform evaluations; collect oral, ocular, and rheumatologic data; and collect specimens. The sites were located at the University of Buenos Aires, Argentina; Peking Union Medical College, Beijing, China; Rigshopitalet (formerly at Glostrup Hospital), Copenhagen, Denmark; Kanazawa Medical University, Ishikawa, Japan; King's College, London, UK (joined in 2007); and the University of California, San Francisco (UCSF). In 2009, Aravind Eye Hospital, Madurai, India; Johns Hopkins University, Baltimore, MD; and University of Pennsylvania, Philadelphia, PA were added as additional SICCA sites. UCSF is the coordinating center for SICCA. All specimens and data collected for SICCA are housed at UCSF. To facilitate the research focused on understanding the genetics of Sjögren'sSjögren's syndrome, high-density SNP genotype data and SICCA clinical information are being made available to the research community. This includes participants recruited from all SICCA research groups (RG). These participants (3,382), blood relatives (439), and unrelated healthy controls (25) had their whole blood or saliva sample (Oragene) extracted for DNA for the GWAS at the UCSF DNA Bank. Eighty eight percent of the participants are women, most are of European or Asian ancestry and the median age is 55. To assess potential batch effects when doing case-control comparisons using planned external controls, 30 DNA samples from each of three studies were genotyped with SICCA DNA samples: <ol> <li>The Genetic Architecture of Smoking and Smoking Cessation - <a href="http://www.ncbi.nlm.nih.gov/projects/gap/cgi-bin/study.cgi?study_id=phs000404.v1.p1">Collaborative Genetic Study of Nicotine Dependence (COGEND)</a> - PI: Laura Bierut.</li> <li>NEI-Age-related disease study (AREDS) - <a href="http://www.ncbi.nlm.nih.gov/projects/gap/cgi-bin/study.cgi?study_id=phs000429.v1.p1">Genetic Variation in Refractive Error Substudy</a> - PI: Dwight Stambolian.</li> <li>Controls from the National Institute of Mental Health's <a href="http://www.nimhgenetics.org/available_data/controls/">(NIMH's)</a> Human Genetics Initiative.</li> </ol> <ul><a href="http://www.ncbi.nlm.nih.gov/projects/gap/cgi-bin/study.cgi?study_id=phs000021.v3.p2">Genome-Wide Association Study of Schizophrenia</a> - PI: Pablo V. Gejman.</ul> <ul><a href="http://www.ncbi.nlm.nih.gov/projects/gap/cgi-bin/study.cgi?study_id=phs000167.v1.p1">Molecular Genetics of Schizophrenia - nonGAIN Sample</a> (MGS_nonGAIN) - PI: Pablo V. Gejman.</ul> Genotyping was performed at the Johns Hopkins University Center for Inherited Disease Research (CIDR). Data quality control, dbGaP preparation and posting, and imputation to 1000 Genomes to increase SNP density was performed by the Center for Biomedical Statistics at the University of Washington. Data analysis was performed at UCSF using software PLINK, EIGENSOFT, and SNPTEST.

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Epigenetic Signatures of Salivary Gland Inflammation in Sjögren's Syndrome.

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