Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: KEGG:D02003 (NBT)
 1,323 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A well known in physiology fact is that stimulation with enterohormones (secretin, cholecystokinin) causes a steep increase in the synthesis of pancreatic enzymes, and this might affect the plasma level of amino acids. In view of this, this level was studied in healthy subjects and patients with chronic pancreatitis. Hormonal stimulation was observed to cause in healthy subjects a significant rapid fall of the levels of all amino acids, which was greatest in the 20th minute. A less evident fall of the amino acid level was observed in chronic pancreatitis. A high correlation was noted (r = 0.9) between the value of amino acid fall in plasma and the degree of failure of the exocrine pancreatic function measured with the NBT-PABA test. All results are an encouraging indication that plasma amino acid level fall may be used for the assessment of the pancreatic exocrine potential. In the analysis of individual amino acids the most significant fall was noted of methionine, serine, valine, isoleucine, glutamine and tyrosine.
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PMID:[Level of amino acids in blood plasma as a test for exocrine pancreatic function]. 221 24

A new toxin of Enterobacter cloacae able to lyse erythrocytes and leukocytes was found. Purification of the toxin was performed by salt precipitation, gel filtration, ion exchange and HPLC in C8 column. SDS-PAGE electrophoresis showed more than one bank corresponding to the leukotoxin able to form polymers and aggregate like some pore-forming cytotoxins (RTX). In culture supernatant the toxin showed 1 HU/ml (hemolytic unit) and 1.5 LU/ml (leukotoxic unit); after purification it reached 15 HU/ml and 20 LU/ml. The ratio between HU and percentage red cells affected the lytic capacity. E. cloacae toxin stimulated the oxidative metabolism of neutrophils, but over 50 microg toxin/ml the stimulus ceased as it was shown by NBT assay due to cell death. Chemiluminescence evidenced an increase in superoxide anion generation, but an excess of toxin interfered with this stimulus, as was previously observed in HlyA Escherichia coli toxin. Cross-reaction was found by immunoblotting with this HlyA. E. cloacae toxin presented higher amounts of proline, valine, aspartic and glutamic acids than HlyA. E. cloacae toxin was similar to HlyA in the prescence of a glycine-rich DNA sequence and in the observed effect of calcium on toxin activity. E. cloacae toxin did not cross-react by immunoblotting with hemolysin HmpA of Proteus.
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PMID:Molecular properties and metabolic effect on blood cells produced by a new toxin of Enterobacter cloacae. 1178 62