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2016 ; 68
(3
): 724-9
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Brief Report: Patients With Primary Sjögren s Syndrome Who Are Positive for
Autoantibodies to Tripartite Motif-Containing Protein 38 Show Greater Disease
Severity
#MMPMID26636433
Wolska N
; Rybakowska P
; Rasmussen A
; Brown M
; Montgomery C
; Klopocki A
; Grundahl K
; Scofield RH
; Radfar L
; Stone DU
; Anaya JM
; Ice JA
; Lessard CJ
; Lewis DM
; Rhodus NL
; Gopalakrishnan R
; Huang AJ
; Hughes PJ
; Rohrer MD
; Weisman MH
; Venuturupalli S
; Guthridge JM
; James JA
; Sivils KL
; Bagavant H
; Deshmukh US
Arthritis Rheumatol
2016[Mar]; 68
(3
): 724-9
PMID26636433
show ga
OBJECTIVE: Autoantibodies reactive with Ro52 (tripartite motif-containing protein
21 [TRIM21]) are detected in 70% of patients with primary Sjögren's syndrome
(SS). TRIM21 belongs to a 34-member C-IV family of TRIM proteins. Although
autoantibodies against other TRIM proteins within the C-IV family have been
detected in the sera of patients with primary SS, their clinical relevance
remains unclear. This study was undertaken to investigate the frequency of
anti-TRIM38 in patients with primary SS and evaluate its association with various
clinical measures of the disease. METHODS: Serum samples from patients with
primary SS (n?=?235) and controls (n?=?50) were analyzed for reactivity with in
vitro-transcribed and -translated (35) S-methionine-labeled TRIM38 protein. The
associations of anti-TRIM38 with various laboratory and clinical measures of
primary SS were evaluated. Reactivity of anti-TRIM38 with different structural
domains of TRIM38 was analyzed. Affinity-purified anti-TRIM38 antibodies were
used to immunoprecipitate TRIM21. RESULTS: TRIM38-reactive autoantibodies were
detected in the sera of 24 of the 235 patients with primary SS and 2 of the 50
controls. Anti-TRIM38 positivity was significantly associated with the presence
of anti-Ro60, anti-Ro52, anti-La, rheumatoid factor, and hypergammaglobulinemia.
Clinically, anti-TRIM38 was associated with significantly higher ocular surface
staining scores, lower Schirmer's test scores, and minor labial salivary gland
biopsy focus scores of ?3.0. Anti-TRIM38 antibodies mainly recognized the
cortactin-binding protein 2 (CortBP-2; amino acids 128-238) and the B30.2/SPRY
(amino acids 268-465) domains on TRIM38. Affinity-purified antibodies to
TRIM38-CortBP-2 and TRIM38-B30.2/SPRY domains reacted with TRIM21. CONCLUSION:
Our data demonstrate that anti-TRIM38 specificity arising in a subset of patients
with primary SS is associated with increased severity of the disease.