Abstract:
BACKGROUND:Altered matrix degradation contributes to fibrosis in some liver diseases but the role of matrix degradation in fibrogenesis associated with genetic haemochromatosis has not previously been addressed. AIMS:To measure serum concentrations of tissue inhibitor of metalloproteinase 1 (TIMP-1) and matrix metalloproteinases (MMP), MMP-1, MMP-2, and MMP-3 in patients with haemochromatosis and control subjects. PATIENTS:Forty patients with haemochromatosis and 19 healthy control subjects. Ten of the 40 patients were studied before and after venesection therapy. METHODS:Serum levels of TIMP-1, MMP-1, MMP-2, and MMP-3 were measured by enzyme immunoassay and correlated to hepatic iron concentration and degree of histological fibrosis. RESULTS:Serum TIMP-1 was increased in patients with haemochromatosis compared with controls (163 (30) versus 123 (28) ng/ml, p < 0.0002). Mean serum TIMP-1 concentration of patients with haemochromatosis without fibrosis was significantly higher than in controls (153 (16) versus 123 (28) ng/ml, p = 0.03). Serum TIMP-1 concentration correlated with both hepatic iron concentration and hepatic iron index (r = 0.42, p < 0.01; r = 0.42, p < 0.01). Serum MMP-2 concentrations correlated with increasing degree of fibrosis in patients with haemochromatosis (r = 0.38, p = 0.01). The mean MMP-1: TIMP-1, MMP-2:TIMP-1 and age/sex matched MMP-3:TIMP-1 ratios were significantly lower in patients with haemochromatosis than controls (0.11 (0.06) versus 0.2 (0.14), p = 0.02; 3.32 (0.9) versus 3.91 (0.81), p = 0.05; and 0.26 (0.12) versus 0.47 (0.27), p = 0.007, respectively). Following venesection, MMP-2 and MMP-3 concentrations increased by 11% (p = 0.03) and 19% (p = 0.03), respectively. CONCLUSIONS:This study provides the first evidence of an alteration in matrix degradation in haemochromatosis that may be a contributing factor to hepatic fibrogenesis in this disease.
journal_name
Gutjournal_title
Gutauthors
George DK,Ramm GA,Powell LW,Fletcher LM,Walker NI,Cowley LL,Crawford DHdoi
10.1136/gut.42.5.715subject
Has Abstractpub_date
1998-05-01 00:00:00pages
715-20issue
5eissn
0017-5749issn
1468-3288journal_volume
42pub_type
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