title: [Correlation between the production of mature mammary tumour virus particles and the histomorphological differentiation of murine mammary tumours].
abstract: The mammary tumour virus (MTV) contents of mammary tumours (MT's) of various mouse strains were investigated by means of the indirect immunofluorescence technique and the electron microscopy. Only in acinus-forming, well differentiated MT's MTV-B particles could be observed in high quantity. The release of B particles seems to be correlated with the degree of structural ripeness of the tumor tissue. As to intracytoplasmic A particles such a strong relationship could not be found out. Many A particles were seen in mature adenocarcinomas as well as in acinus-free tumours. Some mammary carcinomas of an extreme low degree of histomorphological differentiation were free of any detectable virus production. The indirect immunofluorescence test was confirmed as a sensitive method for the detection of MTV antigens in MT slices. Using polyvalent anti-MTV sera, obtained after immunization of rabbits with ether-disrupted B particles from tumour tissue or milk, the test system allowed the distinction of A and B particle antigens. Accumulations of B particles were seen as an intercellular fluorescence reaction while clusters of A particles were represented by a granular paranuclear reaction within the tumor cells.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology; D000818:Animals; D002277:Carcinoma / Q000473:pathology; D002454:Cell Differentiation; D005260:Female; D005455:Fluorescent Antibody Technique; D008325:Mammary Neoplasms, Experimental / Q000382:microbiology*; D008324:Mammary Tumor Virus, Mouse / Q000032:analysis / Q000302:isolation & purification*; D051379:Mice; D008854:Microscopy, Electron; D011817:Rabbits / Q000276:immunology
vernacular_title: Korrelation zwischen der Produktion reifer Viruspartikel und der histo-morphologischen Differenzierung virusinduzierter muriner Mammakarzinome