Background: Brick manufacturing constitutes an important industrial sector in Egypt with considerable exposure to silica.

Objectives: We aimed for evaluating hepatic functions in silica-exposed workers in the clay brick industry, and the possible role of matrix remodeling and immunological factors.

Methods: A case-control study, 87 workers as exposed and 45 as control subjects. Questionnaire, clinical examination, and laboratory investigations: liver functions, matrix metalloproteinase-9, immunoglobulins G and E, and anti-liver kidney microsomal antibody.

Results: In the exposed workers, mean levels of liver functions, matrix metalloproteinase-9 (MMP-9), and IgG and IgE were significantly higher. In the silicotic subgroup the mean level of GGT was almost twice the level in the non-silicotic subjects. Logistic regression showed that abnormal GGT and ALT were associated with production workers.

Conclusion: Workers in the clay brick industry showed evidence of liver disease that could be related to matrix remodeling.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4090877PMC
http://dx.doi.org/10.1179/2049396714Y.0000000061DOI Listing

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