Thymosin β4 and β10 in Sjogren's syndrome: saliva proteomics and minor salivary glands expression

被引:5
作者
Bosello, Silvia [1 ]
Peluso, Giusy [1 ]
Iavarone, Federica [2 ]
Tolusso, Barbara [1 ]
Messana, Irene [3 ]
Faa, Gavino [4 ]
Castagnola, Massimo [2 ]
Ferraccioli, Gianfranco [1 ,5 ]
机构
[1] Fdn Policlin Univ Agostino Gemelli, Div Rheumatol, Rome, Italy
[2] Catholic Univ, Inst Chem & Clin Biochem, Rome, Italy
[3] Univ Cagliari, Dept Life & Environm Sci, Cagliari, Italy
[4] Univ Cagliari, Sect Pathol, Dept Surg, Cagliari, Italy
[5] Univ Cattolica Sacro Cuore, Inst Rheumatol & Affine Sci, Via Giuseppe Moscati,31, I-00168 Rome, Italy
关键词
Thymosin beta(4); Thymosin beta(10); Sjogren's syndrome; Saliva; Proteomics; Immunohistochemistry; Minor salivary glands; HEPATOCYTE GROWTH-FACTOR; CLASSIFICATION CRITERIA; AMERICAN-COLLEGE; BETA-4; PEPTIDES;
D O I
10.1186/s13075-016-1134-7
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background: In the present study, we investigated whether thymosin beta (T beta) in saliva and in minor salivary glands is differentially expressed in patients with primary Sjogren's syndrome (pSS) and patients with autoimmune diseases (systemic sclerosis [SSc], systemic lupus erythematosus [SLE], and rheumatoid arthritis [RA], with and without sicca syndrome [ss]). Methods: Saliva specimens of nine patients with pSS, seven with ss/SSc, seven with ss/SLE, seven with ss/RA, seven with SSc, seven with SLE, and seven with RA, as well as ten healthy subjects, were analyzed using a high-performance liquid chromatograph coupled with a mass spectrometer equipped with an electrospray ionization source to investigate the presence and levels of T beta(4), T beta(4) sulfoxide, and T beta(10). Immunostaining for T beta(4) and T beta(10) was performed on minor salivary glands of patients with pSS and ss. Results: T beta(4) levels were statistically higher in patients with pSS with respect to the other subgroups. T beta(10) was detectable in 66.7 % of patients with pSS and in 42.8 % of those with ss/SSc, while T beta(4) sulfoxide was detectable in 44.4 % of patients with pSS and in 42.9 % of those with ss/SSc. T beta(10) and T beta(4) sulfoxide were not detectable in patients without associated ss and in healthy control subjects. Regarding thymosin immunostaining, all patients had immunoreactivity for T beta(10), and a comparable distribution pattern in the four different subgroups of patients was observed. T beta(4) immunoreactivity was present in patients with ss/SSc and those with ss/SLE, while it was completely absent in patients with pSS and those with ss/RA. Conclusions: Our data show that higher salivary T beta expression characterizes patients with pSS, while T beta(4) sulfoxide and T beta(10) salivary expression was selectively present in patients with sicca symptoms. Moreover, at the immunohistochemical level in patients with pSS, minor salivary glands showed a peculiar pattern characterized by immunostaining for T beta(10) in acinar cells in the absence of any reactivity for T beta(4). These findings, taken together, suggest a different role for T beta(4) and T beta(10) in patients with pSS who have ss and other autoimmune disease.
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页数:8
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