Background: Systemic sclerosis (SSc) is an autoimmune systemic disease characterized by diffuse fibrosis of skin and visceral organs due to different genetic, infectious, and/or environmental/occupational causative factors, including the inhalation of silica dust. Objectives: To investigate serum trace elements including silicon (s-Si) levels in SSc patients living in a restricted geographical area with high density of worksites with silica exposure hazard. Methods: This case-control study included 80 SSc patients (M:F 10:70; aged 58.4 ± 11.9SD years, mean disease duration 10.1 ± 7.8SD) and 50 age-/sex-matched healthy control subjects consecutively investigated at our University-based Rheumatology Unit. Patients and controls were evaluated for environmental/occupational exposure categories (structured questionnaire), morphological characterization of serum micro-/nanoparticles (Environmental Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy microanalysis), and quantitative assessment of trace elements (inductively coupled plasma atomic emission spectroscopy). Results: Among various categories, only occupational exposure to silica dust was recorded in a significant proportion of SSc patients compared to controls (55% vs. 11%; p <.0001). Qualitative analysis showed serum silica micro- and nanoparticles in all exposed patients. Quantitative evaluation evidenced significantly higher s-Si levels in SSc patients versus controls (p <.0001); in addition, higher s-Si levels were detected in patients with occupational exposure (p <.0001), diffuse cutaneous SSc (p =.0047), myositis (p =.0304), and/or lung fibrosis (p =.0004) compared to those without; notably, the severity of lung fibrosis scoring positively correlated with s-Si levels (p <.0001). Conclusions: The study first demonstrated high s-Si levels in exposed SSc patients; this element might represent a pathogenetic co-factor of more severe clinical phenotypes, mainly diffuse scleroderma with lung fibrosis.
High serum levels of silica nanoparticles in systemic sclerosis patients with occupational exposure: Possible pathogenetic role in disease phenotypes / Ferri, C.; Artoni, E.; Sighinolfi, G. L.; Luppi, F.; Zelent, G.; Colaci, M.; Giuggioli, D.. - In: SEMINARS IN ARTHRITIS AND RHEUMATISM. - ISSN 0049-0172. - 48:3(2018), pp. 475-481.
Data di pubblicazione: | 2018 |
Titolo: | High serum levels of silica nanoparticles in systemic sclerosis patients with occupational exposure: Possible pathogenetic role in disease phenotypes |
Autore/i: | Ferri, C.; Artoni, E.; Sighinolfi, G. L.; Luppi, F.; Zelent, G.; Colaci, M.; Giuggioli, D. |
Autore/i UNIMORE: | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.semarthrit.2018.06.009 |
Rivista: | |
Volume: | 48 |
Fascicolo: | 3 |
Pagina iniziale: | 475 |
Pagina finale: | 481 |
Codice identificativo ISI: | WOS:000454851400014 |
Codice identificativo Scopus: | 2-s2.0-85050963129 |
Codice identificativo Pubmed: | 30093240 |
Citazione: | High serum levels of silica nanoparticles in systemic sclerosis patients with occupational exposure: Possible pathogenetic role in disease phenotypes / Ferri, C.; Artoni, E.; Sighinolfi, G. L.; Luppi, F.; Zelent, G.; Colaci, M.; Giuggioli, D.. - In: SEMINARS IN ARTHRITIS AND RHEUMATISM. - ISSN 0049-0172. - 48:3(2018), pp. 475-481. |
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