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ultrastructural comparison of a virus from a rhesus-monkey mammary carcinoma with four oncogenic rna viruses.the ultrastructure and morphogenesis of mason-pfizer monkey virus, isolated from a mammary carcinoma in a rhesus monkey, was compared with those of murine mammary tumor virus, murine leukemia virus, l1210 leukemia-associated virus, and avian myeloblastosis virus. the simian virus resembled murine mammary tumor virus and the l1210 virus in that it produced intracytoplasmic particles that were enveloped during budding. it resembled l1210 virus and murine leukemia virus in budding with smooth envel ...19714327008
studies on the mouse mammary tumor agent (mta). 3. electrophoretic distribution of esterases. glucose 6-phosphogluconate dehydrogenases in normal mammary gland of c57b1 and riiif and in virus induced and spontaneous mammary tumours in c57b1 and riii mouse strain. 19714327430
reverse transcriptase in human milk virus. 19714324917
rna-dependent dna polymerase activity in virus-like particles isolated from human milk. 19714324918
serological identification of hamster oncornaviruses. 19714325141
pulling together. 19714325178
inhibition of spontaneous mammary carcinoma of mice by treatment with interferon and poly i:c. 19714325777
appearance of virus particles in balb-c mammary nodule outgrowth lines transplanted into balb-c f. c3h and (c3hf x balb-c)f1 mice. 19714325928
nodule bioassay of the mouse mammary tumor virus: modifications and quantitative considerations. 19714325935
hormonal regulation of rna and protein synthesis in the mouse mammary gland before and during lactation. 19714326220
[cancer of the breast. 1. developmental pathology (etiology and morphogenesis)]. 19714326375
[immunoelectron microscopic studies on mouse mammary tumor virus and leukemia virus]. 19714326485
inhibition of development of mammary tumors in c3h mice by neonatal administration of polycarboxylate. 19714326651
possibility of a dna-containing mammary tumour virus in red blood cells of mouse. 19714323759
[virus induced breast carcinoma in humans?]. 19714323872
localization of mammary tumor virus inside red blood cells of mice. 19714324250
effects of cell fusion on production of the mouse mammary tumor virus--immunofluorescence study. 19714324514
the induction of precipitating antibodies to the mammary tumor virus in several inbred mouse strains. 19714322863
immunological aspects of the relationship between host and oncogenic virus in the mouse mammary tumor system. 19714322864
studies on the immunogenicity of preneoplastic and neoplastic mammary tissues of balb-c mice free of the mammary tumor virus. 19714322865
mouse mammary tumorigenesis by mammary tumor virus in the absence of thymus, spleen or both organs. 19714322866
mammary tumors, plaques, and hyperplastic alveolar nodules in various combinations of mouse inbred strains and the different lines of the mammary tumor virus. 19714322934
[comparative studies on mammary tumor virus detection in murine mammae cancer of strain cba-bln]. 19714335534
[tumorgenesis by type b particles (mammary tumor virus) in the mouse and implications for human pathology]. 19714335903
[penetration by mature particles of mammary cancer virus in producing cells, in vivo]. 19714333132
antigenically distinct forms of mammary tumor virus in blood and mammary tissues of mice. 19714333722
inhibition of pituitary-induced nodular hyperplasia in mammary glands of c3h mice fed a phenylalanine-deficient diet. 19714333726
[concept of the morphological evolution and mechanisms of transmission of mammary cancer virus: attempted generalization]. 19714333760
mammary noduligenic activity of the sperm from various high mammary tumor strain mice in histocompatible recipients of different ages. 19714338569
[increase and modification of the carcinogenic power of mammary tumors virus, after treatment with ethylene oxide; distribution of viral particles]. 19714333066
detection of antigens of the mouse mammary tumor (mtv) and murine leukemia virus (mulv) in cells of cultures derived from mammary tumors of mice of several strains. 19714328811
cell culture techniques in the search for cancer viruses of man. 19714360734
helical nucleocapsid structure of the oncogenic ribonucleic acid viruses (oncornaviruses).negative staining of virions and isolated nucleoids from avian myeloblastosis virus, murine leukemia virus, murine mammary tumor virus, and feline leukemia virus reveals common internal structures. the majority of virions that are penetrated by phosphotungstate show spherical nucleoids with no apparent symmetry. in a small percentage of virions, two distinctive structures are found: (i) single strands (3 to 5 nm in diameter) which are presumed to be the nucleoprotein and are found randomly orien ...19714108573
a virus in human breast cancer? 19714101437
human breast-cancer virus and artificial feeding of babies. 19714102299
demonstration by the antiglobulin consumption test with murine antisera of common antigens in tissues infected with the mammary tumor virus from different mouse strains. 19714107242
characteristics of the structural components of the mouse mammary tumor virus. i. morphological and biochemical studies. 19714108031
[immunology of mammary cancer in mice]. 19714110762
comparative studies on monolayer and suspension cell cultures from a transplantable rat mammary carcinoma containing c-tye virus particles. 19714112478
[is the breast carcinoma of the female caused by a virus?]. 19724114024
homology between rna from human malignant breast tissue and dna synthesized by milk particles. 19724121809
oncogenicity of mammary tumor viruses. 19724122068
binding of concanavalin a to the envelope of two murine rna tumour viruses. 19724110930
regression of spontaneous mammary carcinomas using direct injections of neuraminidase and bcg. 19724111004
electron microscopy in mammary cancer research. 19724112452
electron microscopy of cell transformation by r-35 rat virus and comparative morphology with other oncogenic viruses. 19724112453
human leukaemic cells contain reverse transcriptase associated with a high molecular weight virus-related rna. 19724117891
viral-related rna in hodgkins' disease and other human lymphomas.molecular hybridization with radioactively labeled dna complementary to the rna of the rauscher leukemia virus was used to probe for homologous rna in human lymphomas. 22 of 32 specimens contained rna possessing homology to the rna of the mouse leukemia virus, but not to that of the unrelated viruses causing mammary tumors in mice or myeloblastosis in chickens. normal adult and fetal tissues failed to show significant levels of the leukemia-specific rna. it appears that human lymphomas contain r ...19724340156
the biology of the mouse mammary tumor virus. 19724349859
some structural and antigenic properties of intracisternal a particles occurring in mouse tumors (complement fixation-immunodiffusion-neuroblastoma-plasma-cell tumor).intracisternal a-particles were isolated from three different myeloma lines in balb/c mice and from cultured neuroblastoma cells of a/j origin. all preparations contained a major structural protein with an apparent molecular weight near 70,000 as estimated by electrophoretic mobility in sodium dodecyl sulfate-containing polyacrylamide gels. solubilization of this component by sodium dodecyl sulfate was dependent on prior or concomitant treatment with sulfhydryl compounds. the size distribution o ...19724333040
[the viral problem in mammary tumors]. 19724335126
rna in human leukemic cells related to the rna of a mouse leukemia virus (leukocytes-rna-dna hybridization-rauscher virus-polysomal rna).molecular hybridization with radioactively labeled dna complementary to the rna of the rauscher leukemia virus was used to probe for homologous rna in the polysome fraction of human leukemic cells. the leukocytes of 24 out of 27 patients examined contained rna possessing homology to that of the mouse leukemia agent, but not to that of the unrelated viruses causing mammary tumors in mice or myeloblastosis in chickens. further, no control human leukocytes or other adult and fetal tissues showed si ...19724333985
evidence for translation of viral-specific rna in cells of a mouse mammary carcinoma.a procedure is described permitting the detection of viral-specific rna in a mouse mammary tumor. the method involves molecular hybridization with radioactively labeled dna complementary to the rna of the mouse mammary-tumor virus. rna homologous to that of the mammary agent has been found in both the nuclear and polyribosomal fractions of tumor cells. the results imply that the oncogenic information is serving as messenger rna that directs the synthesis of proteins required for virus production ...19724335063
relationship between organization of mammary tumors and the ability of tumor cells to replicate mammary tumor virus and to recognize growth-inhibitory contact signals in vitro.mammary tumor virus (mtv) replication was confined primarily to cells organized as acini in intact mouse mammary glands. primary mammary tumors maintained a high degree of acinar organization and cells therein continued to replicate mtv vegetatively. nonacinar mammary cells, derived by serial transplantation of acinar tumor cells, no longer actively replicated mtv. this suggests that phenotypic differences exist among mammary epithelial cells in their ability to support virus replication, that a ...19724335525
protein kinase associated with rna tumor viruses and other budding rna viruses. 19724333745
effect of transient immunosuppression on host response to neonatally introduced oncogenic virus. 19724333498
[virus-like particles in breast tissue in breast carcinoma and chronic cystic mastopathy]. 19724333649
urethan and x-ray effects on mice of a tumor-resistant strain, x-gf. 19724345404
electron microscopic study of neoplasms induced by urethan and x-rays in x-gf mice. 19724345405
mammary gland tumors in substrains c57bl-m and c57bl-he mice. 19724345968
tissue culture studies of mouse mammary tumor cells and associated viruses. 19724346536
[immunological cross reaction between human breast cancer and mammopathy and virus-producing breast carcinomas of the mouse]. 19724346686
spontaneous immunity to mammary-tumour virus (mtv)-associated antigens in mice and its influence on syngeneic mammary-tumour growth. 19724346866
[immunologic cross reactions between virus producing and non-virus producing murine mammary carcinoma]. 19724347235
isolation and partial characterization of intracytoplasmic a particles. 19724335936
spontaneous mammary tumours in spf c3h-a vy mice: formation of virus structures. 19724336249
morphologic and functional characteristics of long-term cultures of murine myeloma cells.murine myeloma cells proliferate well in cell culture even after up to 5 years in vitro and the globulin synthesized, as well as the ultrastructure, continues to be comparable to that of original tumor cells. globulin synthesis by cultured cells from the c3h mouse tumor (x5563) ranged from 6 to 12.2 mg/g/48 hr and by cultured cells from balb/c mouse plasmacytomas mopc 21, 31c and 315 up to 40 mg/g/48 hr. this production is greater and occurs over a more prolonged period than those reported in ot ...19724336548
mechanisms of resistance to mammary tumor development in c57bl and i strains of mice. i. noduligenesis, tumorigenesis, and characteristics of nodules and tumors. 19724336864
symposium on mammary neoplasia. introductory remarks. 19724336865
considerations for epidemiologic studies to test the hypothesis of viral causation of human breast cancer. 19724336867
possible etiological role of virus particles detected in rat and monkey mammary tumors. 19724336869
transformation of rat mammary cell cultures by r-35 virus isolated from spontaneous rat mammary adenocarcinoma. 19724336870
cell-associated mammary tumor virus in blood of balb-cfc3h mice. 19724336871
interactions between viral and genetic factors in the origin of mammary tumors in mice. 19724336872
further analysis of the detailed structure of type b and c particles. 19724336873
pitfalls in the isolation of a human breast carcinoma virus in tissue culture. 19724336874
immunologic aspects of tumor induction by mammary tumor virus. 19724336876
immunization studies with mammary tumor virus. 19724336877
immunological studies on human breast carcinoma and mouse mammary tumors. 19724336878
effect of exogenous interferon treatment on mouse mammary tumors. 19724336879
serologic and structural studies of mouse mammary tumor virus. 19724336880
antigens of murine mammary tumor virus: applications to human breast cancer. 19724336881
rna-directed dna polymerase systems: not necessarily transforming rous viruses. 19724336882
polymerase and rna studies on milk virions from women of the parsi community. 19724336884
virus-related rna in human and mouse mammary tumors. 19724336885
symposium on mammary neoplasia. epilogue: quo vadis? 19724336886
maternal modification of self-recognition in ova-transfer substrains of c3h mice. 19724336887
[oncogenic activity of dna preparations isolated from mouse tumors and organs]. 19724337598
serial transplantation of urethan-treated mammary nodule outgrowth line d1. 19724337908
an antigen in human breast cancer sera related to the murine mammary tumour virus. 19724338143
strain differences in thymus weight in mice with different predispositions to spontaneous mammary cancer. 19724339293
[radioresistance of the murine mammary tumor virus subjected to gamma irradiation]. 19724339979
immunosuppression and cancer. 19724340542
[immunology of mammary tumors]. 19724340547
mammary tumour virus specific nucleotide sequences in mouse dna. 19724340575
detection of rna-instructed dna polymerase and high molecular weight rna in malignant tissue.an experimental procedure is detailed that permits the detection of 70s rna-directed dna synthesis in mouse mammary carcinomas. the dna synthesized is complementary to the rna of the mouse mammary tumor virus by molecular hybridization, thus, completing the proof that an rna-instructed dna polymerase has been identified. further, rna-instructed dna polymerase and its 70s rna template are physically associated in a particle that has a density characteristic of oncornaviruses. these experiments no ...19724340747
ultrastructural cytochemistry of enzymes associated with mouse mammary tumour virus (mtv). 19724340767
[is mammary cancer in mice a model for breast cancer in women?]. 19724341060
influence of dietary phenylalanine deficiency on the mammary tumor virus activity in c3h mice. 19724343007
[different effects of early thymectomy on the development of transplanted mammary neoplasms in relation to the presence of the milk factor in the recipients]. 19724343378
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