Change in the Distribution of Acetylcholinesterase Molecular Forms in Hirschsprung's Disease

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Abstract
Density gradient ultracentrifugation shows that two molecular forms of acetylcholinesterase (4S and 10S) can be distinguished in the bowels of both normal subjects and Hirschsprung's disease patients. In this disease, besides the very large elevation of acetylcholinesterase activity, the relative distribution of the heavy and light forms was also changed. In the affected bowel the 10S/4S ratio was 2.5 times higher than the normal value. It is assumed that the accumulation of the 10S form might be a response of the intestine to this pathological state. It is also suggested that the increase in the heavy form is closely connected with the nerve fibre proliferation in the aganglionic megacolon.

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