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Biomedical subjects

O Morin

Publications and source records attributed to O Morin.

At least 73 records · Page 4Linked to original sources
PubMed1975

[Suppurative trichophytosis of animal origin. Apropos of 38 recent cases].

This study of 38 cases observed over a period of 7 years emphasizes the constancy of rural contamination, whether professional or not. An enquiry carried out among veterinary surgeons in this region, showed the increasing frequency of the animal infection particularly in young oxen, hence the increased risk of kerions. The author recalls the clinical description of kerion of the scalp in children and sycosis barbae in adults, in which one may also encounter folliculitis of the limbs. The parasite isolated, included various strains of Trichophyton, e.g., Trichophyton Trimentagrophytes, Tr. verrucosum and, more rarely, Tr. magnini. On the other hand, bacteriological examination was usually negative, there were only two cases of secondary staphylococcal infection. The authors emphasize their concept of the disease which is probably an immune process. Finally, rather than the usual treatment, they emphasize the possibilities of social re-insertion; the disease should be recognised as an occupational disease.

Adolescent↗
PubMedDate not supplied

Cellular interactions promote tissue-specific function, biomatrix deposition and junctional communication of primary cultured hepatocytes.

Hepatocytes, prepared from normal adult rat liver, were seeded onto a collagen substratum and cultured alone or in the presence of rat liver endothelial cells. When hepatocytes were cultured alone in a hormonally defined serum-free medium, decreased albumin production and rapid morphological deterioration of bile canaliculi structures and gap junctions occurred within 4 to 5 days. In contrast, hepatocytes cocultured with liver mesenchymal cells remained morphologically intact and biochemically functional for at least 4 weeks. They reorganized into small islands, continued to secrete high levels of albumin, did not express alpha-fetoprotein (a fetal marker), and remained strongly dye coupled. All of the hepatocytes synthesized albumin and retained their gap junctional channels. No junctional communication was observed between hepatocytes and endothelial cells. Long fibers containing fibronectin, Type I collagen and laminin distributed over the hepatocytes were induced in coculture but never appeared in hepatocytes cultured alone. Moreover, supplementation of the hormonally defined medium with phenobarbital and dimethyl sulfoxide, both of which improve the life span and functional activities of cultured hepatocytes, failed to induce reticulin fiber formation in pure culture of hepatocytes. The modulation of albumin secretion, biomatrix deposition and junctional communication observed in hepatocytes cultured with sinusoidal liver cells was also obtained when hepatocytes were in association with various epithelial or mesenchymal cells [rat liver epithelial cells (T51B), mouse embryonic fibroblasts (NIH 3T3), human or rat dermal fibroblasts and bovine aorta endothelial cells (AG 4762)].

Albumins↗
PubMedDate not supplied

[Do the eosinophilic granulomas observed in Brittany represent a form of anisakiasis? The larvae of Thynnascaris aduncum do not produce these granulomas experimentally].

To explain the enigmatical origin of gastric eosinophilic granulomas prevailing among patients in Brittany (France), we have tried to experiment with the larvae of Thynnascaris (Thynnascaris aduncum (Rud.)), a Nematode found in the sardine (Sardina pilchardus (Walbaum)), a fish sometimes eaten raw in our country. In a preliminary experiment, larvae of Thynnascaris were observed to penetrate the mucosa of the rabbit stomach in vitro at room temperature. But in vivo, whatever the means, the ways and the experimented mammals of our study, we have failed to experimentally reproduce such tumours. We think that this result belongs to the fact that the larvae of Thynnascaris in the conditions of our experimentation could not perform an evolution in homeothermal animals.

Animals↗