共查询到20条相似文献，搜索用时 727 毫秒
1.
HUEBNER RJ LANE WT WELCH AD CALABRESI P MCCOLLUM RW PRUSOFF WH 《Science (New York, N.Y.)》1963,142(3591):488-490
Subcutaneous tumors induced in newborn hamsters by type 12 adenovirus were suppressed when 0.5 mg of 5-iodo-2'-deoxyuridine (IUdR) was given at the same subcutaneous site as the virus. Although one injection of IUdR given immediately after the virus was effective, additional injections on subsequent days reduced further the number of hamsters developing tumors. These effects of lUdR are especially interesting since replication of infectious adenovirus 12 cannot be demonstrated in the hamsters at any time before or after tumor development. 相似文献
2.
Human papovavirus (JC): induction of brain tumors in hamsters 总被引：40，自引：0，他引：40
D L Walker B L Padgett G M ZuRhein A E Albert R F Marsh 《Science (New York, N.Y.)》1973,181(100):674-676
Eighty-three percent of hamsters inoculated at birth with JC virus, a human papovavirus isolated from brain tissue of a case of progressive multifocal leukoencephalopathy, developed malignant gliomas within 6 months. Three brain tumors have been serially transplanted as subcutaneous tumors. JC virus was isolated from five of seven tumors tested. Cells from four tumors were cultivated in vitro. These cells contained an intranuclear antigen with the characteristics of a T antigen, and this antigen was antigenically related to SV40 T antigen. Although virus was not recovered from extracts of serially cultured tumor cells, JC virus was rescued when one tumor cell line was fused with permissive cells. 相似文献
3.
GERBER P 《Science (New York, N.Y.)》1963,140(3569):889-890
The cells of two hamster ependymomas, originally induced by intracerebral inoculation with simian virus 40 in newborn animals, have been serially cultured in vitro. None of the virus was detected in cell-free culture fluids or cell lysates. All cells retained their neoplastic potential when newborn hamsters were inoculated. Data suggest that viral nucleic acid is permanently present in some tumor cells. 相似文献
4.
An epithelial-like cell has been developed in line culture that apparently is stable. Although initially isolated cells were incapable of supporting the growth of poliovirus, the cells of the sixth and later passages allowed virus to propagate. The early, nonsusceptible cells were fibroblastic in appearance, in contrast to the epithelial type, poliovirussusceptible, derived cell of later passages. 相似文献
5.
Neoplastic transformation of hamster astrocytes in vitro by simian virus 40 and polyoma virus 总被引：1，自引：0，他引：1
H M Shein 《Science (New York, N.Y.)》1968,159(3822):1476-1477
Astrocytes in cultures of brain cells from fetal or newborn hamsters undergo neoplastic transformation after infection with simian virus 40 or polyoma virus. Subcutaneous or intracerebral inoculation of the transformed brain cells into newborn or adult hamsters produces progressively enlarging astrocytomas at the sites of injection. Astrocytomas produced by polyomatransformed cell lines are histologically better differentiated, but grow more rapidly and metastasize more frequently, than astrocytomas produced by cell lines transformed by simian virus 40. These observations make available in vitro models of virus-induced oncogenesis in astrocytes and provide simple techniques for obtaining astrocytoma cell lines suitable for screening studies of chemical agents effective against astrocytomas. 相似文献
6.
Oncogenicity of the simian adenoviruses 总被引：7，自引：0，他引：7
R N Hull I S Johnson C G Culbertson C B Reimer H F Wright 《Science (New York, N.Y.)》1965,150(699):1044-1046
Five of 17 adenoviruses of rhesus or cynomolgus monkey origin induced tumors in newborn hamsters. The tumors appeared between 42 and 280 days after subcutaneous inoculation and had the general characteristics of lymphomas. The tumors were specific by cross-complement fixation tests. An adenovirus recovered from Cercopithecus monkeys appeared to be highly oncogenic; all 23 inoculated hamsters developed tumors within 30 to 40 days. 相似文献
7.
Fibroblast-like cells from human embryonic lung were infected with adenovirus type 12, and they survived as an established line, with the characteristics of "transformation" following considerable cellular killing. Inclusion bodies disappeared and cells became resistant to reinfection with type 12 virus as they grew in thick multilayered strands, and giant and syncytial cells became commonplace. An induced new cell antigen demonstrable by complement-fixation and fluorescent-antibody studies persisted for at least 20 culture passages after infection. 相似文献
8.
A passage line of a spontaneous hamster fibrosarcoma is contaminated by the virus. of lymphocytic choriomeningitis. Tumors from animals receiving implants when newborn contain high titers of infectious lymphocytic-choriomeningitis virus and complement-fixing antigen, and hamsters receiving implants when weanlings develop high titers of complement-fixing antibody against lymphocytic-choriomeningitis virus. In contrast with the specific reactions of tumorous hamsters to the initiating virus in virus-induced tumors, the development of complement-fixing antibody to lymphocytic-choriomeningitis virus does not depend on the development of tumors. Infant hamsters bearing the tumor have a generalized subclinical infection and seem able to spread virus to other hamsters and to humans. 相似文献
9.
Herpes simplex virus type 1 (HSV-1), type 2 (HSV-2), and simian virus 40 (SV40) fail to induce immunity in weanling Syrian hamsters to transplant of hamster cells transformed by HSV-2. However, the development of metastatic tumors is markedly enhanced by prior immunization with HSV-1. Immunization with SV40, ultraviolet-irradiated tumor cells, or ultraviolet-irradiated normal hamster embryo cells inhibits the development of metastases. The HSV-hamster system appears a good one for the study of development, prevention, and control of metastases by mammalian cells transformed by a common human virus. 相似文献
10.
试验感染鸭病毒性肝炎雏鸭的组织病理学研究 总被引：6，自引：0，他引：6
对试验感染Ⅰ型鸭肝炎病毒雏鸭的组织病理变化进行了观察,结果表明：接毒后１２ｈ肝、脾、肾及胰等器官组织主要表现为变性性变化;接毒后２４ｈ,则呈现明显的坏死性变化;接毒后７２ｈ及１６８ｈ,则出现较为明显的增生性反应。脑表现为非化脓性脑炎变化。肝、肾、脾及胰的超微结构研究表明,主要是组织细胞的膜系统及核结构的损伤。在肝细胞和脾细胞中有脂滴。在肾小管上皮细胞胞浆中有晶格状排列的类病毒颗粒。 相似文献
11.
Tumor etiology and chromosome pattern 总被引：7，自引：0，他引：7
Fibrosarcomas induced in Chinese hamsters and rats by Rous sarcomla virus and 7,12-dimethylbenz(a)anthracene are associated with nonrandom chromosome variation. Although histologically indistinguishable, the tumors induced by the virus or chemical in each host species are characterized by completely different karyotypic patterns. 相似文献
12.
以患病牙鲆的囊肿组织为试验材料,冰浴匀浆后采用低速离心的方法提取淋巴囊肿病毒,用粗提的病毒液感染牙鲆鳃细胞系FG-9307,同时应用以抗淋巴囊肿病毒单克隆抗体为第一抗体的间接免疫荧光抗体技术检测淋巴囊肿病毒是否感染了牙鲆鳃细胞并在其中增殖.结果发现生长旺盛的单层牙鲆鳃细胞接种淋巴囊肿病毒2天后出现明显的细胞病变效应,形成空斑,应用间接免疫荧光抗体方法检测结果为抗淋巴囊肿病毒单抗与未接种淋巴囊肿病毒的牙鲆鳃细胞呈阴性反应,而接种病毒的牙鲆鳃细胞,细胞质中有明显的特异性荧光,该结果说明牙鲆鳃细胞系是淋巴囊肿病毒的敏感细胞系. 相似文献
13.
14.
Complement-fixing antigens in hamster tumors induced by the Bryan strain of Rous sarcoma virus 总被引：1，自引：0，他引：1
M J Casey G F Rabotti P S Sarma W T Lane H C Turner R J Huebner 《Science (New York, N.Y.)》1966,151(714):1086-1088
Hamster tumors transplanted subcutaneously from primary intracranial tumors which developed after inoculation of the Bryan strain of Rous sarcoma virus, contained virusspecific tumor antigens indistinguishable from those induced by the Schmidt-Ruppin strain. 相似文献
15.
Herpes-type virus and chromosome marker in normal leukocytes after growth with irradiated Burkitt cells 总被引：87，自引：0，他引：87
Cultured cells derived from male patients with Burkitt's lymphoma and harboring herpes-type virus particles were lethally irradiated. These irradiated cells induced normal peripheral leukocytes of female infants to grow within 2 to 4 weeks after mixed cultivation. Cells of a line free of this agent failed to stimulate growth. If either type of cell was cultured separately, it did not survive under the experimental conditions. Herpes-type viral antigen and C-group chromosomal marker previously described in cultured Burkitt cells were found in all of the female cell cultures that were obtained. 相似文献
16.
New method for detecting cellular transforming genes 总被引：24，自引：0，他引：24
D G Blair C S Cooper M K Oskarsson L A Eader G F Vande Woude 《Science (New York, N.Y.)》1982,218(4577):1122-1125
Tumor induction in athymic nude mice can be used to detect dominant transforming genes in cellular DNA. Mouse NIH 3T3 cells freshly transfected with either cloned Moloney sarcoma proviral DNA or cellular DNA's derived from virally transformed cells induced tumors when injected into athymic nu/nu mice. Tumors were also induced by cells transfected with DNA from two tumor-derived and one chemically transformed human cell lines. The mouse tumors induced by human cell line DNA's contained human DNA sequences, and DNA derived from these tumors was capable of inducing both tumors and foci on subsequent transfection. Tumor induction in nude mice represents a useful new method for the detection and selection of cells transformed by cellular oncogenes. 相似文献
17.
Virus-induced hydrocephalus: development of aqueductal stenosis in hamsters after mumps infection 总被引：10，自引：0，他引：10
Hydrocephalus developed as a sequela of mumps virus infections of suckling hamsters. The initial infection after intracerebral inoculation was limited largely to ependymal cells lining the ventricles. This infection was clinically inapparent but later resulted in a noninflammatory stenosis or occlusion of the aqueduct of Sylvius. 相似文献
18.
为了探究PEDV(猪流行性腹泻病毒)流行毒株SHpd/2012侵染细胞的特性,研究采用IFA(间接免疫荧光)及绘制病毒一步生长曲线等方法,对感染PEDVSHpd/2012株后的Vero细胞(非洲绿猴肾细胞)病变过程进行研究。结果发现,CPE(细胞病变)主要表现为细胞肿胀、变圆、皱缩、聚集成合胞体甚至从培养瓶壁大量脱落。IFA结果显示,接毒后12h病毒开始增殖,在接毒后36h时感染细胞数量最多,其后病毒增殖速度逐步下降,60h时趋于平稳。病毒一步生长曲线结果显示,SHpd/2012株感染细胞后24~60h的毒价一直处于较高水平,60h后开始下降。此外,本研究成功克隆并真核表达了PEDV S蛋白,为研究PEDV与受体蛋白的互作及病毒的致病机制奠定基础。 相似文献
19.
It has been demonstrated that dengue virus can be propagated by intracerebral inoculation in mice. Although initial adaptation to the mouse is a tedious and difficult process, 16 consecutive passages have been achieved already in one series and further passages are in progress. The virus propagated in mice produced dengue in human volunters, but was not pathogenic for cotton rats, hamsters, guinea pigs or rabbits. Although it was evident that even after 2 serial passages in mice the virus produced a modified type of disease in human beings, tests with the 7th, 9th and 10th passage material indicated that the modification had become so marked that it could be used as a vaccine for the production of immunity against dengue. 相似文献
20.
Poliovirus host range is determined by a short amino acid sequence in neutralization antigenic site I 总被引：43，自引：0，他引：43
M G Murray J Bradley X F Yang E Wimmer E G Moss V R Racaniello 《Science (New York, N.Y.)》1988,241(4862):213-215
The mouse-adapted strain of poliovirus type 2 (Lansing) induces fatal poliomyelitis in mice after intracerebral inoculation, whereas mice inoculated with poliovirus type 1 (Mahoney) show no signs of disease. Previous work indicated that the adaptation to mouse virulence is associated with the viral capsid proteins and that mutations in neutralization antigenic site I of poliovirus reduce neurovirulence of the Lansing strain in mice. The role of antigenic site I in mouse neurovirulence was further explored by constructing an antigenic hybrid virus. Six amino acids in antigenic site I of the Mahoney strain were replaced with a sequence specific for the Lansing strain by using a mutagenesis cartridge. The hybrid virus was neutralized by polyclonal antisera elicited by the type 1 and type 2 strains of poliovirus and by neutralizing monoclonal antibodies directed against antigenic site I of type 2 virus. The hybrid virus induced paralytic disease in mice, an observation demonstrating that a short sequence of amino acids in antigenic site I is an important determinant of poliovirus host range. Antigenic site I may be involved in attachment of poliovirus to cells of the mouse central nervous system. 相似文献