Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0019204 (hepatocellular carcinoma)
 71,386 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Lymphokine-containing supernatants derived from seven different human lymphoid cell lines and lymphokine-containing supernatants from concanavalin A-stimulated murine lymphocytes were found to be capable of reversibly inhibiting the migration of tumor cells in vitro. The tumor cell lines used in these studies were the P815 mastocytoma, Ehrlich ascites, Walker carcinosarcoma, Hepatoma 129, and Sarcoma 37. Preliminary physiochemical evidence suggests that the mediator, here termed TMIF, is distinct from MIF. In any case, these results suggest the possibility that lymphokines other than lymphotoxin or macrophage-activating factors may play a role in tumor immunity.
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PMID:Inhibition of migration of tumor cells in vitro by lymphokine-containing supernatants. 9 77

A factor chemotactic for Walker carcinosarcoma and Novikoff hepatoma tumor cells can be generated by incubation of serum with an extract from tumor cells. The chemotactic factor has no activity for neutrophilic leukocytes, and three factors chemotactic for leukocytes are not chemotactic for tumor cells. By the use of complement deficient serums as well as purified complement components, the chemotactic factor for tumor cells has been found to be a fragment of the fifth component (C5) of complement and appears to result from direct interaction of C5 with an enzyme in the extract. The chemotactic factor for tumor cells can be classified as a functionally unique fragment of C5 that may significantly influence the behavior of tumor cells in vivo.
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PMID:A unique complement derived chemotactic factor for tumor cells. 17 96

Under study were kinetic regularities in development and incorporation of tritium labelled thymidine into cells of two experimental metastasizing tumors -- Zajdela ascites hepatoma and Walker carcinosarcoma, transplanted intratesticulary. Primary tumors and their metastases in regional lymph nodes show certain differences relative both to the rate of the process and intensity of the DNA synthesis, and relative number of cells with incorporated labelled thymidine.
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PMID:[A kinetic analysis of the growth of transplanted tumors and their metastasis]. 17 77

One week after the sc injection of minced tissues of the livers, kidneys, or spleens of W, Donryu, and MP rats into the left back of syngeneic rats, ascites-type tumor cells derived from rat hepatoma (AH 130) or Walker carcinosarcoma cells derived from rat breast tumor were inoculated sc into the right back. Ascites hepatoma cell growth was slowest in the group given the liver preparation, whereas no significant difference was noted in the growth of Walker carcinosarcoma in all groups. The results were similar in all strains.
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PMID:Growth suppression of subcutaneously inoculated hepatic tumors after injection of syngeneic liver cells into the subcutaneous tissue of rats. 17 87

Antibodies to chromatin proteins of Novikoff hepatoma cells formed precipitin bands in the double-diffusion immunoprecipitation assay with chromatin proteins of Novikoff hepatoma, Walker 256 carcinosarcoma, and 18-day fetal rat liver. The antigen used for preparation of antiserum was the chromatin proteins initially extracted with 3 M NaCl-7 M urea and soluble after dialysis to 0.14 M NaCl-0.35 M urea. The chromatin proteins used for analytical studies were extracted with 0.6 M NaCl containing 0.01 M Tris-HCl (pH 8) and 100 muM phenylmethylsulfonyl fluoride. Corresponding chromatin proteins of normal and 18-hr regenerating rat liver, heart, and kidney did not form precipitin bands. The antigen was purified from the chrmatin of Novikoff hepatoma cells by exclusion chromatography on Sephadex G-150 and preparative nondenaturing polyacrylamide gel electrophoresis. Its migration on denaturing sodium dodecyl sulfate-polyacrylamide gels corresponded to a molecular weight of 26,000. Amino acid analysis showed that the ratio of acidic to basic amino acids was 1.4 to 1.0. Evidence for its homogeneity included its migration as a single protein spot on two-dimensional polyacrylamide gel electrophoresis and its single lysine amino-terminal amino acid. This protein is a glycoprotein, as shown by the presence of 15 moles of galactosamine per mole of antigen. These studies demonstrate the presence of a fetal glycoprotein in the chromatin of two tumors that may have an important role in determining their gene products.
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PMID:A fetal protein in chromatin of Novikoff hepatoma and Walker 256 carcinosarcoma tumors that is absent from normal and regenerating rat liver. 18 70

Two-dimensional polyacrylamide gel electrophoresis shows that in nuclei of Novikoff hepatoma ascites cells there are approximately 75 proteins in the chromatin fraction soluble in 3 M NaCl:7 M urea. Dialysis of this fraction to an ionic strength of 0.15 produces a soluble fraction and a precipitate. The proteins in the soluble fraction have been reported to be active in gene control. Antibodies to the soluble fraction distribute diffusely throughout the nucleus, and antibodies to the precipitate localized primarily in the nucleolus and the nuclear ribonucleoprotein network. The nucleolar proteins differ from the extranucleolar proteins in antigenicity and labeling patterns. The development of methods for isolation, purification, and identification of nuclear proteins provided the opportunity for analysis of chromatin antigens in tumor cells. Utilizing two-dimensional preparative polyacrylamide gel techniques as well as conventional procedures, several nuclear proteins have been isolated in electrophoretically homogeneous states including protein A-24, a histone-like nonhistone protein; C-14, a protein that stimulates nucleolar RNA polymerase; and a chromatin antigen soluble in 3 M NaCl:7 M urea that remains soluble after dialysis to 0.15 M NaCl to precipitate the histones and the DNA. This antigen has been found in the chromatin of both the Novikoff hepatoma and the Walker 256 carcinosarcoma but not in the chromatin of either normal or regenerating liver. It is a nonhistone nuclear protein as indicated by its amino acid analysis in which the ratio of the number of acidic to basic amino acids is approximately 1.4. Further studies are in progress on the function and structure of this chromatin protein. As an approach to analysis of relative rates of synthesis of this antigen and otherproteins, the products of translation of messenger RNA of Novikoff hepatoma and normal liver are being analyzed by autoradiography of two-dimensional electrophoretic gels.
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PMID:Antigenically active nonhistone chromatin proteins in cancer cells. 18 49

A factor has been studied that is chemotactic in vitro for Walker carcinosarcoma and Novikoff hepatoma cells of rats and for murine mastocytoma cells, but not for neutrophils. This chemotactic factor is generated by the incubation of normal serum with a crude extract from tumor cells. The generation of the tumor cell chemotactic factor is time and temperature dependent and results in greater than 30% reduction of serum complement activity. The tumor cell chemotatic factor appears to be a small cleavage product of the fifth complement component (C5) which binds to serum globulin. This has been shown by the use of agammaglobulinemic serum. By the use of isolated C5 fragments there is direct evidence that the tumor cell chemotactic factor is structurally derived from a larger C5 leukotactic fragment. The study of tumor cell chemotaxis, particularly the involvement of the complement system in this phenomenon, may suggest a novel approach to the investigation of the mechanism of metastasis in the malignant process.
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PMID:Further studies on the C5-derived chemotactic factor for tumor cells. 19 34

The effect of methylcobalamine (5.6-dimethylbenzimidazolyl-Co-methylcobamide, CH3-B12) and cyanocobalamine (5,6-dimethylbenzimidazolyly-Co-cyanocobamide, CN-B12) on the growth of Walker's carcinosarcoma and longevity of white noninbred rats with implanted Zajdela ascites hepatoma was studied. The two agents exerted a similar effect. They 1) reduced the survival of rats with implanted Zajdela ascites hepatoma and Walker's carcinosarcoma; 2) did not increase the cell concentration in ascites; and 3) increased the total volume of ascites.
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PMID:[Influence of methylcobalamin and cyanocobalamin on the neoplastic process in rats]. 19 3

A newly synthesized water-soluble nitrosourea derivative, 1-(2-chloroethyl)-3-(beta-D-glucopyranosyl)-1-nitrosourea (GANU; NSC-254157) has marked activities against experimental tumors such as lymphoid leukemia L-1210, ascites sarcoma- 180, ascites hepatoma AH-130, and Walker carcinosarcoma-256. A single intraperitoneal injection of the compound is more effective than successive injections on the L-1210 system. An especially interesting point is that both the single intraperitoneal and single oral administrations 2 days after tumor implantation showed a high effectiveness. In addition, growth of the mammary adenocarcinoma transplanted subcutaneously on the back of mice was also considerably suppressed by successive intraperitoneal injections of the compound.
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PMID:Effect of 1-(2-chloroethyl)-3-(beta-D-glucopyranosyl)-1-nitrosourea on experimental tumors. 20 35

The results of studies conducted on 355 white nonpedigree male rats (268 experimental and 87 intact animals) indicated that nephrogenic hypertension: a) potentiates the development of benz(a) pyrene induced blastomas; b) enhances, as a rule, the growth of transplantable tumors: carcinoma RS-1 and sarcoma 45; c) results in a tendency to more frequent metastasization of the tumors (Walker carcinosarcoma and Zajdela ascites hepatoma).
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PMID:[Nephrogenic hypertension and carcinogenesis]. 70 95


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