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Medline ® Abstract for Reference 84

of 'Laboratory tests to support the clinical diagnosis of anaphylaxis'

Usefulness of serum mast cell-specific chymase levels for postmortem diagnosis of anaphylaxis.
Nishio H, Takai S, Miyazaki M, Horiuchi H, Osawa M, Uemura K, Yoshida K, Mukaida M, Ueno Y, Suzuki K
Int J Legal Med. 2005;119(6):331.
Chymase, a serine protease, is stored mainly in secretory granules of human mast cells. Serum chymase concentration was examined in 8 autopsy cases with anaphylaxis as well as in 104 control cases without anaphylaxis. It was detected in all 8 cases with anaphylaxis (range 3-380 ng/ml, mean 89.8 ng/ml), while it was detected in only 2 of the 104 controls and was below a detectable level (<3 ng/ml) in the other 102. Serum tryptase levels are known to be a diagnostic indicator of anaphylaxis, therefore the relationship between serum chymase and tryptase levels was investigated in the 8 cases of anaphylactic death; a significant positive correlation was found (r=0.826, p=0.011). Furthermore, chymase was shown to be quite stable in serum. These results showed that measurement of serum chymase levels might be an additional tool for postmortem diagnosis of anaphylaxis.
Department of Legal Medicine, Osaka Medical College, Takatsuki 569-8686, Japan. leg010@art.osaka-med.ac.jp