delta-9-Tetrahydrocannabinol (THC) inhibition of the membrane transport system for thymidine]

THC decreases 3H-thymidine uptake within 15 sec. after addition of the drug to the culture (L1210 murine lymphoma cells and human lymphocytes). Experiments performed at 0 degrees C indicate that THC has no action on thymidine binding to the carrier. THC in micromolar concentration inhibits DNA synthesis through a alteration of membrane configuration.     

Inclusion of Gross virus cell surface associated antigen in liposomes]

The Gross virus associated cell surface antigen GCSAa was extracted from (C58NT)D cells by solubilization of membranes with detergent and partially purified. This antigen was entraped in liposomes. Absorption experiments of the cytotoxic activity towards EmaleG2 cells of a W/Fu anti (C58NT)D serum showed the presence of the antigen at the surface of sensibilized liposomes.     

Immunocytology of alpha-endorphin positive hypothalamic fibers of Carassius auratus L. and Cyprinus carpio L.]

An immunocytological study of the basal hypothalamus of Carassius auratus and Cyprinus carpio with an alpha-endorphin antiserum shows the different nerve processes belonging probably to the immunoreactive cells of the lateral part of the N.L.T. According to their pathways, two main fibre tracts have been distinguished: many fluorescent fibres converge towards the pituitary gland into which they enter, other fibres run caudally through the tuber towards the nucleus tuberis inferior (Baumgarten and Braak) where they could not be followed further.     

Electron microscope observation of "thyroidectomy cells" in the hypophyseal ventral lobe of a Chondrichthyan fish, the small spotted dogfish, Scyllium canicula Cuv.]

In the adenohypophysis of very young spotted dogfish, only one kind of granulated cells show strcutural changes following thyroidectomy: the small granule cells of the ventral lobe (granule diameter about 110 nm). These cells are similar to the thyrotrophs of other Vertebrates, and well distinct from the supposed gonadotrophs found in the same lobe.     

A quantitative difference in the immune response to sheep red cells between rat strains

Résumé Des rats appartenant à plusieurs souches ont été immunisés par injection i.p. de 2×10⁸ globules rouges de mouton. La mesure du titre des haemolysines réalisée 6 jours plus tard montre des différences quantitatives selon les souches. Une réponse importante n'a pu être décelée que pour 3 d'entre elles (August, OFA et Wistar R).     

Histochemistry of lysosomal enzymes in juxtaglomerular cells

Zusammenfassung In den Granula juxtaglomerulärer granulierter Mäusenierenzellen wurde eine saure Phosphatase und eine-Glykuronidase-Aktivität nachgewiesen. (Methoden für Arylsulphatase und unspezifische Esterase waren negativ.) Es wird der Zusammenhang mit der Lysosomenart der Granula diskutiert.