Abstract
Introduction
The aim of this study was to show the clinical and pathological characteristics of anti-centromere-antibody (ACA)-seropositive Sjögren’s syndrome (SS) in two anti-human T-cell leukemia virus type I (HTLV-I)-seropositive patients.
Methods
One patient was an HTLV-I carrier whereas the other was diagnosed with HTLV-I-associated myelopathy (HAM). Background data including serum HTLV-I titers, viral loads, and cytokine profiles were recorded. Azocarmine with aniline blue (Azan)–Mallory staining and immunohistochemistry of the labial salivary glands (LSGs) and a muscle biopsy specimen from the HAM patient were performed.
Results
Serum transforming growth factor beta (TGF-β), tumor necrosis factor alpha (TNF-α), and HTLV-I viral load were high in the HAM-SS patient compared with the HTLV-I carrier. Fibrous change in LSG was prominent in the HAM-SS patient. Although TGF-β expression was similar in the two patients, expression of HTLV-I-related proteins including p12, p28, group-specific antigen (GAG), and nuclear factor kappa-B (NF-κB) in the LSG were dominantly detected in the HAM-SS patient. Frequency of TGF-β staining in HTLV-I-seropositive SS patients without ACA, HTLV-I-seronegative SS patients with ACA, and HTLV-I-seronegative SS patients without ACA was lower than that of the previous two patients.
Conclusion
A high HTLV-I viral load in situ is supposed to promote the production of cytokines, especially TGF-β, resulting in the fibrous change of LSG in ACA-seropositive SS patients.
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Abbreviations
- ACA:
-
Anti-centromere antibody
- ANA:
-
Anti-nuclear antibody
- CSF:
-
Cerebrospinal fluid
- HAM:
-
HTLV-I-associated myelopathy
- HTLV-I:
-
Human T-cell leukemia virus type I
- IFN-γ:
-
Interferon gamma
- MNC:
-
Mononuclear cell
- LSG:
-
Labial salivary gland
- SS:
-
Sjögren’s syndrome
- TGF-β:
-
Transforming growth factor beta
- TNF-α:
-
Tumor necrosis factor alpha
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Nakamura, H., Horai, Y., Tokuyama, A. et al. HTLV-I virological and histopathological analysis in two cases of anti-centromere-antibody-seropositive Sjögren’s syndrome. Mod Rheumatol 23, 133–139 (2013). https://doi.org/10.1007/s10165-012-0641-x
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DOI: https://doi.org/10.1007/s10165-012-0641-x