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A new test using N-benzoyl-L-tyrosyl-p-aminobenzoic acid (N-BT-PABA) for an evaluation of exocrine pancreatic function was compared with a pancreozymin-secretin test in 38 subjects. Urinary recovery of PABA, which is absorbed from the intestine and conjugated in the liver after an oral administration of N-BT-PABA, depends mainly on chymotrypsin activity. The recovery rate of PABA in urine decreases in chronic pancreatitis, in which chymotrypsin activity in the duodenal juice is disturbed. The recovery rate of PABA in calcifying chronic pancreatitis was 40.2 +/- 15% and significantly less than 81.2 +/- 7.4% in normal subjects (P less than 0.01). The amount of PABA in urine during eight hours was correlated with parameters of volume output- bicarbonate concentration and amylase output stimulated by injections of pancreozymin and secretin (P-S test). The new test using N-BT-PABA is useful for the evaluation of exocrine pancreatic function in general practice.
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Urinary excretion of p-aminobenzoic acid (PABA) within 6 h after oral administration of N-benzoyl-L-tyrosyl-P-aminobenzoic acid (Peptide-PABA) was measured. In healthy subjects PABA-excretion rate was not different after 150 mg and 1 g Peptide-PABA. PABA-recovery was significantly lower in patients with chronic pancreatitis. Seperation between healthy persons and patients with chronic pancreatic insufficiency was better with 1 g Peptide-PABA.
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The prophylactic use of the antifibrinolytic drug, PAMBA, in a small intravenous dose preoperatively, combined with local irrigation postoperatively, effectively reduces blood loss. The drug is safe and relatively free of adverse side effects, but attentive postoperative care is warranted.
Experimental mice fed a balanced rodent chow, called LSM fodder, had markedly lower gamma-glutamyl transferase activity in the epithelium of intestinal villi then control mice fed wheat. After oral administration of gamma-14C-glutamyglycine, oxidized 14C-glutathione or gamma-glutamyl-p-amino-benzoate the amounts of gamma-glutamyl substrates and their metabolites in intestines, livers and kidneys of experimental mice were significantly lower than those in control mice. L-serine simultaneously administered with gamma-14C-glutamylglycine reduced the radioactivity of gamma-glutamyl substances in organs of the control mice. No differences in organ radioactivity of experimental and control mice were observed when some uniformly labeled with 14C amino acids were given. The obtained results are not in aggreement with hypothesis on a role of gamma-glutamyl transferase in amino acid transport.
In acute experimental pancreatitis in the rat neither intravenous nor intramuscular therapy with the antifibrinolytic drug PAMBA (p-aminomethylbenzoic-acid) had any influence on the lethality, enzyme content in either serum, ascites and pancreas or on the amount of destruction of the organ.
In rabbits (intact and with experimental myocardial infarction) histamine metabolism (histamine content and diaminoxidase activity) following introduction of malaben was studied. In intact animals the ability of malaben to reduce the blood histamine level and to activate diaminoxidase was discovered. Administration of malaben in experimental myocardial infarction promotes a quicker normalization of the disturbed metabolism of histamine.
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