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Potato tuber proteins efficiently inhibit human faecal proteolytic activity: implications for treatment of peri‐anal dermatitis
Author(s) -
Ruselervan Embden J. G. H.,
Van Lieshout L. M. C.,
Smits S. A.,
Van Kessel I.,
Laman J. D.
Publication year - 2004
Publication title -
european journal of clinical investigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.164
H-Index - 107
eISSN - 1365-2362
pISSN - 0014-2972
DOI - 10.1111/j.1365-2362.2004.01330.x
Subject(s) - proteases , protease , feces , proteolytic enzymes , microbiology and biotechnology , medicine , biology , immunology , gastroenterology , enzyme , biochemistry
Background Frequent diarrhoea after intestinal resections and faecal incontinence in healthy infants may lead to perianal injury. A causative agent may be a high concentration of pancreatic proteases in faeces. The aim of the present study was to assess whether protease inhibitors are applicable for treating and preventing peri‐anal dermatitis by inhibiting the initial cause of the inflammation, the faecal proteases. Design Proteolytic activity was estimated in faeces of subjects frequently suffering from peri‐anal dermatitis: patients with intestinal resections and healthy infants. The development of perianal dermatitis was studied after the construction of a reservoir with ileoanal anastomosis. The inhibitory effect of crude and partly purified potato juice on proteolytic activity of faecal output from patients with intestinal resections and healthy infants was investigated in vitro and in vivo (skin tests). Results Faecal protease activity in faeces from patients with intestinal resections and healthy infants was found to be significantly higher than in healthy adults. After the construction of an ileum reservoir, 46 of 48 patients developed a protease‐related peri‐anal dermatitis. The partly purified protein fraction from potatoes inhibited the larger part of faecal proteases in vitro and completely prevented skin irritation by pancreatic proteases dissolved in sterilized faecal fluid, in a 24‐h skin test, on the back of healthy human volunteers. Conclusions Potato proteins contain protease inhibitors, which suppress almost the complete proteolytic activity in faeces. Topical application of potato protease inhibitors might be a novel approach in preventing protease‐induced peri‐anal dermatitis, and therapeutic studies are needed to confirm our results.