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Query: UMLS:C0034067 (emphysema)
 11,506 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

By application of the correlation flow resistance/intrathoracic gas volume the lung emphysema is differentiated in quality within the scope of chronic obstructive lung diseases. For these groups immunoglobulins, the alpha1-trypsin activity in serum and the activity of further protease inhibitors were determined. There are no substantial variables in the different groups with regard to immunoglobulins. In the emphysema group alpha1-antitrypsin was a little reduced. This group included 2 patients with an alpha1-antitrypsin deficit. The two-dimensional separation of the inter-alpha-trypsin big inhibitor shows 3 areas which decrease significantly in case of severe emphysemata. The irritation of the inter-alpha-trypsin big inhibitor, i.e. in its turnover, parallel to the increasing degree of emphysema formation, is discussed.
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PMID:[Clinical-functional emphysema diagnostics and immunological correlations (author's transl)]. 31 77

This article reviews some properties of human leucocyte elastase. This 30 kDa glycoprotein formed of 218 amino acid residues, is a serine proteinase which cleaves proteins at Val-X, Ala-X, Leu-X or Met-X bonds. Leucocyte elastase solubilizes fibrous elastin and also degrades other extracellular matrix proteins. It hydrolyses and inactivates a number of plasma proteins. Synthetic substrates are more convenient than elastin to measure elastase activity. A large number of natural and synthetic inhibitors of leucocyte elastase have been described. The former include alpha 1-proteinase inhibitor or alpha 1-antitrypsin, inter-alpha-inhibitor, alpha 2-macroglobulin, bronchial and cervical mucous inhibitor and a number of animal and plant proteins. Numerous synthetic inhibitors with therapeutic potentials have been designed. The efficiency of an inhibitor depends, among others, upon its rate of association with the enzyme and upon the stability of the enzyme-inhibitor complex. Elastase probably plays a physiological function in neutrophil migration, phagocytosis and tissue remodeling. It apparently plays a pathological role in pulmonary emphysema, rheumatoid arthritis, infections and inflammation. The pathogenic role of leucocyte elastase is best understood in emphysema.
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PMID:[Human leukocyte elastase]. 306 2