DNA methylation at diagnosis is associated with response to disease-modifying drugs in early rheumatoid arthritis. Glossop, J. R., Nixon, N. B., Emes, R. D., Sim, J., Packham, J. C., Mattey, D. L., Farrell, W. E., & Fryer, A. A. Epigenomics, 9(4):419–428, April, 2017.
doi  abstract   bibtex   
AIM: A proof-of-concept study to explore whether DNA methylation at first diagnosis is associated with response to disease-modifying antirheumatic drugs (DMARDs) in patients with early rheumatoid arthritis (RA). PATIENTS & METHODS: DNA methylation was quantified in T-lymphocytes from 46 treatment-naive patients using HumanMethylation450 BeadChips. Treatment response was determined in 6 months using the European League Against Rheumatism (EULAR) response criteria. RESULTS: Initial filtering identified 21 cytosine-phosphate-guanines (CpGs) that were differentially methylated between responders and nonresponders. After conservative adjustment for multiple testing, six sites remained statistically significant, of which four showed high sensitivity and/or specificity (≥75%) for response to treatment. Moreover, methylation at two sites in combination was the strongest factor associated with response (80.0% sensitivity, 90.9% specificity, AUC 0.85). CONCLUSION: DNA methylation at diagnosis is associated with disease-modifying antirheumatic drug treatment response in early RA.
@article{glossop_dna_2017,
	title = {{DNA} methylation at diagnosis is associated with response to disease-modifying drugs in early rheumatoid arthritis},
	volume = {9},
	issn = {1750-192X},
	doi = {10.2217/epi-2016-0042},
	abstract = {AIM: A proof-of-concept study to explore whether DNA methylation at first diagnosis is associated with response to disease-modifying antirheumatic drugs (DMARDs) in patients with early rheumatoid arthritis (RA).
PATIENTS \& METHODS: DNA methylation was quantified in T-lymphocytes from 46 treatment-naive patients using HumanMethylation450 BeadChips. Treatment response was determined in 6 months using the European League Against Rheumatism (EULAR) response criteria.
RESULTS: Initial filtering identified 21 cytosine-phosphate-guanines (CpGs) that were differentially methylated between responders and nonresponders. After conservative adjustment for multiple testing, six sites remained statistically significant, of which four showed high sensitivity and/or specificity (≥75\%) for response to treatment. Moreover, methylation at two sites in combination was the strongest factor associated with response (80.0\% sensitivity, 90.9\% specificity, AUC 0.85).
CONCLUSION: DNA methylation at diagnosis is associated with disease-modifying antirheumatic drug treatment response in early RA.},
	language = {eng},
	number = {4},
	journal = {Epigenomics},
	author = {Glossop, John R. and Nixon, Nicola B. and Emes, Richard D. and Sim, Julius and Packham, Jon C. and Mattey, Derek L. and Farrell, William E. and Fryer, Anthony A.},
	month = apr,
	year = {2017},
	pmid = {27885849},
	keywords = {DNA Methylation, Illumina 450K array, T-lymphocyte, disease activity score with 28 joint counts (DAS28), disease-modifying antirheumatic drugs (DMARDs), early rheumatoid arthritis, treatment response},
	pages = {419--428},
}

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