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PubMed1980

[Liver fibrosis. 2].

The mortality of liver cirrhosis has doubled during the past two decades and is still increasing in most of the European countries. One important feature and precursor of liver cirrhosis is liver fibrosis. Its aetiology includes a wide spectrum of well known causes, in Europe most frequently alcohol, virus infection, and chemical agents. The pathomechanism of liver fibrosis is unknown. Diagnostic and therapeutic approaches for early detection and treatment have been recently developed applying the results of pathobiochemical, cellular and clinical research. The composition of the excess hepatic connective tissue suggests the involvement of myofibroblasts and shows similarities to atherosclerotic plaques and lung fibrosis. The isolation, purification and cultivation of cells from liver biopsies offers new avenues for the study of fibroplastic cells. Clinical studies are now facilitated, since products of the collagen synthetic pathway - procollagen peptides - can be measured in serum with a sensitive radioimmunoassay. Further prospective studies including additional parameters of fibroplasia, such as N-acetyl-beta-D-glucosaminidase, lysyl-oxidase and prolyl-hydroxylase will have to demonstrate the diagnostic value of such methods. Even today, they should be applied in therapeutic trials of chronic fibrotic liver diseases. Better knowledge of the molecular regulation of connective tissue and the use of new animal models and cellular systems support a successful search for new therapeutic tools. Above all, limitation of alcohol consumption, vaccination for viral hepatitis and elimination of chemical agents offer the prevention of fibrosis, which calls for major efforts on a nation-wide scale.

Acetylglucosaminidase↗
PubMedDate not supplied

Neurological dysfunction of the bladder in workers exposed to dimethylaminopropionitrile.

Neurogenic bladder dysfunction, characterized by hesitancy, need to strain, decreased stream, and increased duration of urination, developed in 104 (63%) of 166 employees working in the manufacture of polyurethane foam. Highest rates of illness (69%) occurred in production workers, and no illness occurred in office or warehouse workers. Onset of the epidemic coincided with introduction of a catalyst, dimethylaminopropionitrile (DMAPN), and monthly case incidence rates increased as DMAPN use increased. Outbreak ceased abruptly when DMAPN use was stopped. Of eight patients who underwent neurourologic testing during recovery, seven lacked either detrusor reflex or normal sensation of bladder filling; seven had a subclinical sensory abnormality; three had prolonged sacral-evoked responses; and two of these three had limb motor neuropathies. Dimethylaminopropionitrile is unique among known neurotoxins in producing urinary symptoms more frequently than limb nerve symptoms.

Adult↗