Abstract
The objectives of this study were to describe the clinical features and evaluate the utility of immunological features as predictors of organ involvement and disease severity in patients with primary Sjogren’s syndrome (pSS). In this single-center observational cross-sectional study, subjects fulfilling the 2012 AECG criteria or 2016 ACR/EULAR criteria for pSS were included. Details of glandular, extra-glandular manifestations, ESSDAI, ESSPRI, ANA, anti-Ro/La antibodies, rheumatoid factor (RF), complement (C3 and C4) levels and hyperglobulinemia were noted. Chi-square and Mann–Whitney U tests were performed for determining associations and relative risk (RR) was calculated. Sixty-four subjects with pSS were included in the study. Females constituted 92% and median age at onset was 37.5 (15–74) years. Ocular or oral sicca was noted in 61 (95.3%) subjects and parotidomegaly was noted in 17 (26.5%) subjects. Extra-glandular manifestations noted were: constitutional (85.9%), articular (65.6%), renal (29.6%), hematological (26.6%), cutaneous (12.5%), peripheral nerves (9.3%) and pulmonary (4.7%). Immunological features noted were: ANA (85.9%), anti-Ro (81.3%), anti-La (60.9%), RF (84.4%), hypocomplementemia (39.1%) and hyperglobulinemia (62.5%). Median ESSDAI was 6 (0–23) and ESSPRI was 7 (0–10). ANA was associated with younger age and renal involvement (RR 1.25). Anti-Ro was associated with younger age, renal involvement (RR 1.36) and high ESSDAI. Anti-La was associated with high renal (RR 3.4) and low articular involvement (RR 2.75). RF was associated with hematological involvement and hyperglobulinemia was associated with younger age. Certain immunological features can help predict the organ involvement in patients with pSS. Larger, prospective follow-up studies are needed to clearly understand these associations.
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Acknowledgements
We thank Mr. Prabir Dass, Mrs. Rajwant Kaur and Mrs. Shashi Anand, Department of Immunopathology, for their help in performing various laboratory investigations of study subjects.
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No funding was received from any source to carry out the work described in this study.
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HSKR and GN conceptualized the study; HSKR, GN, VS, VD, SKS, AS and SJ contributed in collecting clinical data; MK and RWM contributed in collecting immunological data. HSKR and GN analyzed and interpreted the data. HSKR and GN drafted the manuscript while all other authors critically analyzed and revised the manuscript. All authors approved the final version of the manuscript for submission and agree to be accountable for all aspects of the work being submitted.
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The study was conducted after approval by the Institute Ethics Committee and the study complies with the Declaration of Helsinki. A written informed consent was obtained from all subjects before being enrolled in the study.
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Relangi, H.S.K., Naidu, G.S.R.S.N.K., Sharma, V. et al. Association of immunological features with clinical manifestations in primary Sjogren’s syndrome: a single-center cross-sectional study. Clin Exp Med 22, 613–620 (2022). https://doi.org/10.1007/s10238-021-00772-2
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DOI: https://doi.org/10.1007/s10238-021-00772-2