Abstract:
:Deoxyribonuclease1 (DNase1) is involved in chromatin degradation of apoptotic cells. Its deficiency results in accumulation of self-DNA, which in turn may induce inflammation and autoimmunity. We assessed for the first time serum DNase1-activity in a large consecutive cohort of treatment-naïve patients with autoimmune liver diseases (ALD). DNase1-activity was determined by single radial enzyme-diffusion (SRED) at diagnosis of 224 patients with autoimmune hepatitis (AIH), 249 with primary biliary cirrhosis (PBC) and 36 with primary sclerosing cholangitis (PSC). Sera from 146 patients with chronic hepatitis B or C, 140 with nonalcoholic fatty liver disease/nonalcoholic steatohepatitis (NAFLD/NASH) and 114 healthy individuals served as disease and healthy controls. Available serum samples during remission from 50 AIH and 39 PBC patients were also investigated by paired analyzes. DNase1-activity was significantly lower in AIH, PBC and PSC compared to viral hepatitis (p < 0.02, p < 0.001, p = 0.03), NAFLD/NASH (p < 0.001) and healthy (p < 0.001). No significant difference was found in between each specific ALD. In AIH, DNAse1-activity was positively correlated with aspartate aminotransferase (AST) (p < 0.02), bilirubin (p < 0.01) and increased IgG (>1400 mg/dl; p < 0.05); in PBC, with AST (p < 0.01), alanine aminotransferase (ALT) (p < 0.03) and anti-mitochondrial antibodies (AMA) (p = 0.008). In PSC, DNase1-activity was inversely associated with alkaline phosphatase (ALP) (p < 0.05). In AIH, complete responders were characterized by increased baseline DNase1-activity compared to partial responders, relapsers and non-responders (p < 0.02), whereas it was significantly increased after achievement of remission (p < 0.001). Serum DNase1-activity is significantly decreased in ALD patients, indicating its potential implication in their pathogenesis. Furthermore, DNase1-activity could be used as a new surrogate biomarker for predicting response to AIH treatment.
journal_name
Autoimmunityjournal_title
Autoimmunityauthors
Gatselis NK,Vakrakou AG,Zachou K,Androutsakos T,Azariadis K,Hatzis G,Manoussakis MN,Dalekos GNdoi
10.1080/08916934.2017.1279610subject
Has Abstractpub_date
2017-03-01 00:00:00pages
125-132issue
2eissn
0891-6934issn
1607-842Xjournal_volume
50pub_type
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