Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.4.21.1 (chymotrypsin)
 10,938 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Culture filtrates of enteropathogenic strains of E. coli from adult patients with cholera-like diarrhoea produced a rhythm-disturbing effect when injected into isolated sacklets of rabbit ileum. This action was shown to be medium-dependant. It could not be elicited by cultures grown in synthetic medium. Meat extract cultures gave variable results, but the gut movements could be irritated regularly when cultures were grown in a casamino acids - yeast extract medium (table, figure). This activity which was not associated with non-pathogenic strains appeared in the beginning of the stationary phase of growth. The factor responsible for the dysrhythmic effect could be precipitated by ammonium sulphate, was dialysable, withstood boiling for 10 minutes (figure) and treatment with trypsin, chymotrypsin and pancreatin. Antisera prepared against culture filtrates of strain 10407 containing agglutinating and vascular permeability neutralizing antibodies did not neutralize the gut irritating effect efficiently. We conclude that the factor of our assay system is perhaps closely related to the heat-stable enterotoxin described by other authors concerned by E. coli enterotoxins.
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PMID:[Toxin production by enteropathogenic colibacilli in adult persons (author's transl)]. 24 Nov 79

Recent evidence indicates that toxigenic Clostridium difficile strains are a major cause of antimicrobial-associated ileocecitis in laboratory animals and pseudomembranous colitis in humans. C. difficile ATCC 9689 was cultivated in a synthetic medium to which 3% ultrafiltrated proteose peptone was added. Purification of the toxin from broth filtrate was accomplished through ultrafiltration (100,000 nominal-molecular-weight-limit membrane), precipitation with 75% (NH4)2SO4, and chromatographic separation using Bio-Gel A 5m followed by ion-exchange chromatography on a diethylaminoethyl-Sephadex A-25 column. The purified toxin displayed only one band on polyacrylamide gel electrophoresis, and approximately 170 pg was cytopathic for human amnion cells. The isolated toxin was neutralized by Clostridium sordelli antitoxin, heat labile (56 degrees C for 30 min), and inactivated at pH 4 and 9; it had an isoelectric point of 5.0, increased vascular permeability in rabbits, and caused ileocecitis in hamsters when injected intracecally. Treatment of the toxin with trypsin, chymotrypsin, pronase, amylase, or ethylmercurithiosalicylate caused inactivation, whereas lipase had no effect. By gel filtration, its molecular weight was estimated as 530,000. Upon reduction and denaturation, the toxin dissociated into 185,000- and 50,000-molecular-weight components, as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Extensive dissociation yielded only the 50,000-molecular-weight component. The toxin appears to be protoplasmic and is released into the surrounding environment upon autolysis of the cells. Attempts to correlate specific enzymatic activity with the toxin have been unsuccessful. These studies will help delineate the role of C. difficile toxin in antimicrobial-associated colitis and diarrhea.
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PMID:Purification and characterization of Clostridium difficile toxin. 47 34

Immunoreactive lipase (IRL) was measured in 368 stool samples from 231 individuals by means of a new enzyme-linked immunoabsorbent assay technic, to test its validity as an indicator of exocrine pancreatic insufficiency. Ninety-seven stool samples from 64 healthy volunteers showed a logarithmically normal distribution of IRL values and a median IRL concentration of 17 micrograms/g (range, 2.75-117.3 micrograms/g) with a statistically calculated lower normal limit of 4 micrograms/g. In 100 stool samples from patients with chronic pancreatitis and proven steatorrhea the median IRL concentration of 6 micrograms/g (range, 0.002-107 micrograms/g) was significantly lower than that of normal controls and of 52 stool samples from patients with chronic pancreatitis without steatorrhea (IRL, 40 micrograms/g; range, 0.55-302 micrograms/g), 45 stool samples from 23 patients with celiac disease (IRL, 96 micrograms/g; range, 6.05-563 micrograms/g), and 30 stool samples from 26 patients with chronic diarrhea (IRL, 57 micrograms/g; range, 4.2-573 micrograms/g). It is concluded that fecal IRL is a promising new enzyme test with low diagnostic sensitivity (34%) but excellent diagnostic specificity (98%) in chronic pancreatitis and for diagnostic study of chronic diarrheal disorders. In contrast to fecal chymotrypsin, the test results are unaffected by pancreatic enzyme replacement therapy.
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PMID:Fecal immunoreactive lipase: a new tubeless pancreatic function test. 158 7

In a double-blind, placebo-controlled, crossover trial, we investigated the effects of the prokinetic drug cisapride in patients with cystic fibrosis and chronic recurrent distal intestinal obstruction syndrome (DIOS). After a baseline period, 17 patients (12.9 to 34.9 years; 12 boys) received, in random order, cisapride (7.5 to 10 mg) and placebo three times daily by mouth, each for 6 months. Gastrointestinal symptoms (flatulence, abdominal pain, fullness, abdominal distension, nausea, anorexia, heartburn, diarrhea, vomiting and regurgitation) were scored three times monthly and physical examinations assessed. At baseline and at each 6-month period, assessment included food intake for 7 days, 3-day stool collection, pulmonary function tests, and abdominal radiographs. During cisapride therapy compared with placebo, there were significant reductions in flatulence (p less than 0.005), fullness, and nausea (p less than 0.05). Patients with the worst symptom scores benefited most from cisapride. With cisapride, 12 patients felt better and three worse (p less than 0.05); physicians judged 11 patients improved and two worse (p less than 0.05). No side effects were noted. There were no significant differences between cisapride and placebo periods in nutritional status, x-ray scores, pulmonary function, food intake (fat, protein, calories), stool size and consistency, and fecal losses of fat, bile acids, chymotrypsin, and calories. For acute episodes of DIOS, intestinal lavage was needed 6 times in 4 patients during treatment with cisapride, and 11 times in 6 patients receiving placebo. In comparison with unselected patients with cystic fibrosis and pancreatic insufficiency who were receiving enzyme supplements and who had no distal intestinal obstruction, fecal fat losses (percentage of intake) were almost twice as high in the study group with DIOS (31.2 +/- 20.6% vs 16.2 +/- 17.6%; p less than 0.01). We conclude that in the dosage used, long-term treatment with cisapride appears to improve chronic abdominal symptoms in patients with cystic fibrosis and DIOS, but fails to abolish the need for intestinal lavage. Cisapride treatment had no effect on digestion and nutritional status of cystic fibrosis patients with pancreatic insufficiency.
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PMID:Effects of cisapride in patients with cystic fibrosis and distal intestinal obstruction syndrome. 223 Dec 17

The case of a 55-year-old patient with Crohn's disease and chronic intermittent diarrhea as well as progressive weight loss of 20 percent of his body weight is reported. The establishment of the diagnosis was difficult at the beginning, since characteristic symptoms were missing and radiological and endoscopical findings were normal. Loam-coloured glossy stools, repeated registration of a reduced chymotrypsin concentration of the stool and the response of the symptoms to a substitution of pancreatic enzymes were initially regarded as signs of an exocrine pancreas insufficiency. Not before multiple biopsies were taken from the macroscopically largely normal small and large intestine during persisting complaints, an extensive infiltration with Crohn's disease could be shown. This case report emphasizes the importance of taking multiple biopsies in etiologically unexplained chronic diarrhea even from macroscopic inconspicuous intestinal mucosa. Because of the rising incidence of Crohn's disease late onset is gaining increasing significance in the differential diagnosis of chronic diarrhea in the elderly patients.
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PMID:[Late initial manifestations of Crohn disease with atypical symptoms]. 277 34

Random fecal chymotrypsin activity and fecal alpha 1-antitrypsin (FA-1-AT) concentrations were determined in 11 children with cystic fibrosis, 5 children with Crohn's disease, 9 children with chronic aspecific diarrhea, 85 children with acute gastroenteritis, and 54 control children. Cystic fibrosis patients showed only very low fecal chymotrypsin values that did not overlap with values obtained in patients with either acute or chronic diarrhea. When compared with our control group, a significant increase of FA-1-AT concentrations was found only in children with Crohn's disease. Normal values were found in all patients with either chronic aspecific diarrhea or cystic fibrosis, while 12 of 85 children with acute gastroenteritis showed FA-1-AT concentrations above the 95th percentile of control children. We conclude that diarrhea (either acute or chronic) does not significantly decrease the clinical usefulness of fecal chymotrypsin activity measurements in the diagnosis of pancreatic insufficiency, while acute (gastroenteritis) but not chronic (chronic aspecific diarrhea, cystic fibrosis) diarrhea can give rise to protein losing and FA-1-AT concentrations similar to those found in Crohn's disease.
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PMID:Usefulness of random fecal alpha 1-antitrypsin and chymotrypsin determinations in children. 278 61

Using a new colorimetric method we measured the faecal chymotrypsin in 407 subjects, divided as follows: 252 adult subjects with a normal exocrine pancreatic function as shown by duodenal intubation, 24 adult patients with a mild to moderate pancreatic insufficiency, and 26 adult patients with severe pancreatic insufficiency. In addition, 40 healthy children, 50 children with chronic diarrhoea, and 15 with cystic fibrosis were studied before and after substituting enzyme therapy. Faecal chymotrypsin was found to be useful in evaluating the degree of exocrine functional insufficiency in subjects with diseases of the pancreas that had already been clinically ascertained. The same cannot be said for its ability to provide an early diagnosis of subjects with a slight-moderate insufficiency in exocrine pancreatic function.
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PMID:A new faecal chymotrypsin method for evaluating the exocrine pancreatic function in patients with different pancreatic diseases. 336 Nov 60

The advantages of the photometrical analysis of chymotrypsin in stool of dogs are: the short duration of procedure, the small amount of stool necessary and the simplified manner of measurement at 405 nm. The test was performed in healthy as well as in chronically pancreatic insufficient dogs and those with other origins of diarrhea. The normal value for healthy dogs was more than 1 U chymotrypsin/g stool. Because of distinct individual ranges of chymotrypsin activities a single detection is not sufficiently diagnostic. Several results below 1 U/g stool indicate a great likelihood of chronic pancreatic insufficiency.
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PMID:[Photometric determination of chymotrypsin in feces of the dog. A new method in the diagnosis of chronic exocrine pancreatic insufficiency]. 371 50

The purpose of this report is to evaluate whether a new, simple, non-invasive method for chymotrypsin measurement in stools is useful for the diagnosis of exocrine pancreatic insufficiency in cystic fibrosis (CF). A hundred children aged from 2 months to 12 years were tested: 50 children had been admitted for chronic diarrhoea, 15 for cystic fibrosis and 40 acted as controls. Chymotrypsin in stools was assayed using a kinetic measurement with Succ-Ala-Ala-Pro-Phe-pNa as substrate in a simple photometric assay. In 13 of 15 children with cystic fibrosis, stool enzyme levels were always remarkably low, while all control subjects and all children not presenting cystic fibrosis had normal stool levels of chymotrypsin. Our data suggest that stool chymotrypsin measurement is a simple and reliable "tubeless" test for the evaluation of exocrine pancreatic insufficiency in children with cystic fibrosis.
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PMID:Fecal chymotrypsin: a new diagnostic test for exocrine pancreatic insufficiency in children with cystic fibrosis. 404 20

For evaluation of pancreatic function testing, a peptide that releases p-aminobenzoic acid (PABA) on digestion by chymotrypsin was given to clinically normal dogs and to dogs with unexplained diarrhea. Blood concentration of PABA and percentage of PABA excretion in the urine at 6 hours after oral administration were determined. One-hour blood values did not reflect pancreatic exocrine secretion as well as did the 6-hour urinary excretion values.
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PMID:Evaluation of 60-minute blood p-aminobenzoic acid concentration in pancreatic function testing of dogs. 697 19


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