| 11746190 |
Nakamura T, Ushiyama C, Shimada N, Hayashi K, Ebihara I, Suzaki M, Koide H: Changes in concentrations of type IV collagen and tissue inhibitor of metalloproteinase-1 in patients with paraquat poisoning. J Appl Toxicol. 2001 Nov-Dec;21(6):445-7.
Respiratory failure is one of the major causes of death in patients with paraquat poisoning. In paraquat-poisoned lungs, abnormal extracellular matrix regulation occurs. The aim of the present study is to determine whether serum concentrations of type IV collagen and tissue inhibitor of metalloproteinase-1 (TIMP-1) are altered during the course of paraquat poisoning and whether haemoperfusion therapy affects these concentrations. Twenty-one patients were admitted within 3 h after ingestion of paraquat and all patients received direct haemoperfusion therapy. Five out of 21 patients survived and 16 patients died within 28 days. Plasma paraquat concentrations in non-survivors (5740 +/- 380 microg l (-1)) were not significantly different from those in survivors ( 5920 +/- 280 microg l (-1)) before treatment. Haemoperfusion reduced these concentrations in both non-survivors (120 +/- 7 microg l (-1)) as well as survivors (136 +/- 9 microg l (-1)) on day 5. Serum concentrations of type IV collagen and TIMP-1 in survivors showed little change between day 1 (type IV collagen, 90.4 +/- 3.6 ng ml (-1); TIMP-1, 172.2 +/- 7.0 ng ml (-1)) and day 5 (type IV collagen, 92.6 +/- 4.2 ng ml (-1); TIMP-1, 174.2 +/- 7.2 ng ml (-1)). In contrast, these concentrations in non-survivors on day 5 (type IV collagen, 143.6 +/- 7.8 mg ml (-1); TIMP-1, 246.8 +/- 13.6 ng ml (-1)) were significantly higher than those on day 1 (type IV collagen, 88.4 +/- 4.2 ng ml (-1), P < 0.01; TIMP-1, 170.6 +/- 9.2 ng ml (-1), P < 0.05). These data suggest that serum concentrations of type IV collagen and TIMP-1 may be useful indicators for the development of respiratory failure in patients with paraquat poisoning. |
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