Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0027651 (tumor)
 685,946 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Effect of PS-K on tumor growth and antibody production was studied in inbred C57BL/6, SL, C3H/He, and AKR mice, and in colony-bred ICR mice. (1) PS-K exhibited antitumor activity on sarcoma-180 in ICR mice, but not in AKR mice. Growth of sarcoma-180 was suppressed to the intermediate extent in other strains. (2) In ICR strain, antibody production against trinitrophenyl was depressed in mice bearing sarcoma-180 and restored by PS-K. In AKR mice, on the other hand, antibody production was not depressed in tumor-bearing state and was not augmented by PS-K. Other strains showed intermediate degrees of suppression of antibody-producing capacity by sarcoma-180 and its restoration by PS-K.CR strain, the growth of Ehrlich tumor as the challenge tumor was enhanced in mice bearing sarcoma-180 as compared to that in controls. After the treatment with PS-K in this strain, however, not only the growth of sarcoma-180 but also of Ehrlich tumor was inhibited completely. On the other hand, the growth of Ehrlich tumor in AKR strain was neither enhanced in mice bearing sarcoma-180 nor inhibited by PS-K.
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PMID:Mouse strain difference in the expression of antitumor activity of PS-K. 13 29

In vitro transformation of brain cells of hamsters at various ages was examined after the addition of bovine adenovirus type 3 to determine the type and origin of the target cells. Cellular transformations occurred only in cultures of fetus and newborn animals and at low incidences. Nine cell lines were obtained. Virus specific tumor antigens were demonstrated in the transformed cells. The present investigation suggested that bovine adenovirus type 3 might transform mesenchymal cells (ME cell) and that these cells are probably of meningeal or vascular origin. The histological picture of tumors following transplantation of the transformed cells resembled human primary sarcoma of the meninges and brain.
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PMID:In vitro studies on target cells of oncogenic adenoviruses in hamster brain. III. In vitro transformation of brain cells of hamsters at various ages by bovine adenovirus type 3. 13 85

Previous experimental data suggested a pronounced inhibition of the spontaneous intravascular tumor cell shedding by induced antifibrinolysis. Furthermore, the growth rate of primary tumours was reduced. This initiated the present investigation, in which the effect of antifibrinolysis, induced with tranexamic acid, on the per-operative intravascular release of cells from a 20-methylcholanthrene induced rat sarcoma was studied. Tumour cell shedding was estimated by registration of the outgrowth of secondary tumours in animals transplanted intrasmuscularly or intravenously with blood from the operatively treated tumour area. Induced antifibrinolysis was not found to influence the intravascular shedding of tumour cells. However, a significantly increase release of tumour cells was found during biopsies on large primary tumours compared to the same operative procedure on small tumours.
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PMID:Experimental studies on the effect of induced antifibrinolysis on per-operative tumour cell shedding. 13 84

Impairment of mitogen responses to Con A and LPS and of MLR and MLTR was detected in the spleens of rats bearing syngeneic Moloney sarcoma tumors. Depressed responses of both T cell and Ig+ cell populations were observed. During the observation period of 6 to 10 days post-tumor inoculation when maximal T cell-mediated cytotoxicity was observed in spleen and draining lymph node cells, spleen cells showed marked impairment in response to stimuli mentioned above. By contrast, draining lymph node cell activity was either unaltered or somewhat elevated above the level of activity measured in normal control populations. Data presented in this and an accompanying paper strongly indicate that macrophages are activated as immunosuppressor cells in tumor-bearing rats.
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PMID:Altered lymphocyte functions in rats bearing syngeneic Moloney sarcoma tumors. I. Mitogen responses, mixed lymphocyte reactions (MLR) and mixed lymphocyte-tumor reactions (MLTR). 13 90

A case of abdominal wall epithelioid sarcoma, studied by light and electron microscopy over a 3-year period, is presented. Ultrastructurally, there appear to be two types of tumor cells, light and dark, which differ by virtue of a heavier concentration of microfibrils and dilated rough endoplasmic reticulum in the dark cells. Both tumor cell types contain prominent Golgi systems, abundant free ribosomes, and numerous pinocytotic vesicles. The ultrastructural characteristics of the tumor cells resembel those of epithelioid cells of experimental human granulomas, as well as those of normal human synovium. A multifaceted relationship between histiocytes and synovial cells is demonstrated and it is concluded that the tumor is probably derived from mesenchymal reserve cells capable of differentiating a long histiocytic or synovial lines. Preliminary chemotherapeutic data are reviewed.
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PMID:Epithelioid sarcoma: case report with ultrastructural review, histogenetic discussion, and chemotherapeutic data. 13 71

A study was made of the effect of various cytotoxic drugs on the ability of i.v.-injected KHT sarcoma cells to form lung colonies in syngeneic C3H mice. Some enhancement of the number of lung colonies following an i.v. injection was seen following pretreatment of the mice with actinomycin D and mithramycin, while pretreatment with vinblastine, bleomycin, methotrexate, cytosine arabinoside, or 5-fluorouracil had little or no effect on lung colony formation. Pretreatment of the mice with cyclophosphamide, however, greatly increased lung colony formation (by a factor of approximately 100). This enhancement in lung colony formation was maximal when the drug was given 24 hr prio to the injection of tumor cells, but was seen as early as 2 hr and persisted as long as 8 weeks prior to the tumor cell injection. The degree of enhancement of lung colony formation was related to the dose of cyclophosphamide and was present in weaning as well as adult mice. This enhancement was not significantly reversed by anticoagulation with either aspirin or warfarin. Immunosuppression by whole-body irradiation did not affect the number of lung colonies seen in cyclophosphamide-treated mice. The mechanism by which cyclophosphamide enhances metastatic tumor growth within the lung is not known. The major effect, however, does not appear to be mediated either by specific immunological or clotting factors.
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PMID:The effect of cyclophosphamide and other drugs on the incidence of pulmonary metastases in mice. 13 74

Murine sarcoma virus, Moloney strain, was inoculated intracerebrally into 75 Spraque-Dawley rats within 24 hours after birth. Of 48 rats examined histologically within 35 days after virus inoculation, most developed granulomatous lesions in the meninges or in the cortex and in the glial nodules of the subependymal region, or in all these regions. The granulomatous lesions first appeared 8 days after virus inoculation and reached a peak about 30 days after virus inoculation. Thereafter, the lesions healed gradually to scars and disappeared. Of 27 rats that survived beyond 35 days, 10 developed brain tumors at or near the sites of cortical granulomatous lesions and subependymal glial nodules. The interval from virus inoculation to death of tumor-bearing rats was between 40 to 115 days, averaging 84 days. The predilection sites were in the subependymal region and hippocampal cerebral cortex. Three brain tumors were cultured using monolayer and rotation culture techniques. These cultured tumor cells showed morphological features very similar to those of the original tumor cells. THe tumor was classified morphologically into the astrocytoma group by light and electron microscopy and by cytological characteristics of tumor cells in tissue culture.
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PMID:The pathology of brain tumors induced by murine sarcoma virus, Moloney strain. 13 51

Heparan sulfate from the surface of a variety of mouse cells at different cell densities was examined by ion-exchange chromatography. The results of this analysis show that: (1) The heparan sulfate from new isolates of Swiss 3T3 cells transformed by SV40 virus (a DNA tumor virus) elutes from DEAE-cellulose at a lower ionic strength than that from the parent cell type. This finding confirms our earlier observation with an established SV40-transformed cell line (Underhill and Keller, '75) and eliminates the possibility that this change is caused by extended passage in culture. (2) For both parent and transformed 3T3 cells, the heparan sulfates from low and high density cultures were the same as judged by chromatography on DEAE-cellulose. This result demonstrates that the transformation-dependent change which we have observed is independent of cell density. (3) The heparan sulfate from Balb/c 3T3 cells transformed with Kirsten murine sarcoma virus (an RNA tumor virus) elutes from DEAE-cellulose prior to that from parent Balb/c 3T3 cells. This result extends the transformation dependent change in heparan sulfate to the Balb/c 3T3 cell line and to cells transformed with an RNA virus.
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PMID:Heparan sulfates of mouse cells. Analysis of parent and transformed 3T3 cell lines. 13 10

Cells of sarcoma 180 and of Ehrlich's carcinoma were maintained by serial transplantation in male and female Swiss mice. Either estrogen, progesterone, or testosterone were injected im at doses of 1 mg/mouse. Ascitic fluid was aspirated at intervals of 1, 3, 6, 24, and 48 hours following hormone injections. Enzyme activities were analyzed by subjective grading according to the intensity of staining reaction. Estrogen produced enhancement of alkaline phosphatase activity in both types of cells in both sexes of mice. Progesterone produced increased alkaline phosphatase activity in both types of cells from female hosts but an inhibitory effect in male hosts' cells. Testosterone produced no change in enzyme activity in tumor cells of female hosts but in male hosts it inhibited enzyme activity of sarcoma 180 cells and activated activity in carcinoma cells. The effect of all 3 hormones on acid phosphatase activity was activation. With adenosine triphosphatase, estrogen stimulated the activity in both types of tumor in both sexes. Progesterone stimulated cells from male hosts with little or no effect on cells from female hosts. This enzyme was resistant to testosterone. Succinate dehydrogenase activity under similar conditions was different. Estrogen reduced this activity and progesterone produced some inhibition of activity. Testosterone inhibited the sarcoma cells but had no effect on carcinoma cells of either sex. Others have shown that sex hormones affect the enzyme activities beyond the target tissues, particularly in the liver, kidney, and pancreas. Different responses of the enzymes seemed to depend on the endogenous hormonal status of the mice.
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PMID:Enzymatic responses of transplanted tumour cells towards estrogen, progesterone and testosterone. 13 8

A case of endobronchial carcinosarcoma is reported in which a small area of epidermoid carcinoma at the base of the partly necrotic, polypoid part of the tumor was found, and where the pulmonary invasive part consisted of osteosarcoma. To our knowledge such a case has not been published before. In the literature 23 cases of endobronchial carcinosarcoma were found. All but one of those alive at the time of diagnosis were considered operable. The first year survival rate of the reviewed and the reported cases was 36% of all or 42% of the resected cases. The figures for bronchial carcinoma are 33% or 62% of the resected cases. The pre- and post-operative mortality for endobronchial carcinosarcoma was 23%. Because follow-up was too short, the 5 year survival rate cannot be estimated. Features common to pulmonary sarcoma and pseudosarcoma of the upper respiratory tract are also discussed.
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PMID:Endobronchial carcinosarcoma. A case with osteosarcoma of pulmonary invasive part, and a review with respect to prognosis. 14 May 9


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