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

Palpable subcutaneous transplants of hepatocellular carcinoma-35 appeared slightly earlier in male animals; however, the number of successful growths was no greater than that in female animals. Castration and administration of testosterone or diethylstilbestrol were performed after the transplants reached 1.0-1.5 cm in size. The carcinoma was less well differentiated histologically, had more bile pigment, grew rapidly, mestastasized sooner and killed the host quickly in castrated females given testosterone propionate. Bile was present in lung metastases. There was little difference in the growth rate in intact or castrated male or female animals. Exogenous diethylstilbestrol slowed the growth of the transplants and cause weight loss in castrated males. The weight loss was felt to be related to extensive necrosis of the carcinoma.
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PMID:Influence of sex and sex hormones on transplantable hepatocellular carcinoma in the rat. 16 45

In this case report, the patient had been delivered by Caesarean section and weighed only 4 pounds at birth. The mother was O negative, the father A positive, and the infant A positive. Initial red cell count was 2.85 million/cu mm; white cell count, 19,200/cu mm; and hemoglobin 70% of normal. At 3 months of age hemoglobin was 10% of normal. Bone marrow examination revealed marked erythroid hyperplasia. A diagnosis of Blackfan-Diamond syndrome was made. He received blood transfusions every 2 or 3 weeks for the first 4 years of his life. During his lifetime he received 433 units of packed cells for the treatment of congenital hypoplastic anemia. Vitamin-B12, folic acid, and iron were given without benefit. At 8 years of age a spelectomy was done. 20 months after surgery he recovered from pneumonococcal meningitis without sequelae. Progressive signs of hemochromatosis developed and finally progressive signs of heart failure with edema. At 24 years of age severe epigastric pain developed. An open liver biopsy disclosed multiple liver nodules which proved to be hepatoma. Severe ascites followed the surgery. Pulmonary metastases of the liver tumor developed and heart failure. He died at age 25. This patient had received no androgen. He was consistently hepatitis antigen negative. He was prepubertal at the age of 25 and had almost no endogenous androgens. Alpha-fetoglobin was present. This test may be useful as a screening test for hepatoma.
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PMID:Hepatocellular carcinoma, transfusion-induced hemochromatosis and congenital hypoplastic anemia (Blackfan-Diamond syndrome). 18 Aug 2

Lasiocarpine, a pyrrolizidine alkaloid, was fed at a dietary concentration of 50/10(6) for 55 weeks, to 20 male F-344 rats. Malignant tumours developed in 17/20 animals between 48 and 59 weeks. Forty-five percent (9/20) developed angiosarcomas of the liver and 35% (7/20) had hepatocellular carcinomas. Other tumours included malignant adnexas tumour of the skin (1 rat) and lympohoma (1 rat). Lung metastases were observed in 4 animals with angiosarcoma of the liver and one animal with hepatocellular carcinoma. From one animal, angiosarcoma was successfully transplanted through 4 generations.
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PMID:Malignant neoplasms in rats fed lasiocarpine. 20 22

A spectrum of chemically induced transplantable adenocarcinomas of the rat hepatocyte was developed in inbred strains of rats. For the most part, the tumors showed remarkable stability in growth rate between 1973 and 1976, as determined by months between transfers. A few tumors were slower-growing in 1976 than in 1973, and a few tumors of intermediate growth rate were somewhat slower-growing in 1973 than in 1976. Percentage distributions of chromosomes of six aneuploid hepatoma are presented. The most homogeneous cell lines were a haploid and a hyperdiploid line. The karyotype of each hepatoma had a consistent number of abnormal chromosomes. Lung metastases were observed in almost all cell lines.
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PMID:Development, growth rate, degree of malignancy, and chromosome pattern of Morris transplantable hepatomas. 38 79

Eight LF x ICIG cell hybrid clones, isolated upon fusion of normal ICIG-7 human fibroblasts with tumorigenic, non-metastatic LF Cl.2A cells derived from a DAB-induced rat hepatocarcinoma, were studied. They were all highly tumorigenic and were capable of developing spontaneous lung metastases in syngeneic animals. All the hybrids were characterized by a rapid loss of human chromosomes. However, in long-term culture, they all revealed a persistence of human genetic information as assessed by Southern blotting. In hybrid lines in which human chromosomes were still visible, the most recurrent were numbers 7 and 9. Neither chromosome 7, previously reported to bear some of the genes controlling metastasis in human X mouse T-cell hybrids, nor chromosome 9 appeared to be correlated with the metastatic potential of LF X ICIG hybrids. The same conclusion applied (1) to a human 3.3-kb EcoRI DNA fragment which was amplified (approx. 10-fold) only in metastases induced by one out of 3 metastatic hybrids tested; (2) to the transcription level of c-Ha-ras and c-Ki-ras genes which was enhanced (approx. 4-fold) in metastatic and non-metastatic lines as well. Co-transfection of LF Cl.2A cells with pHSG 272 selectable marker DNA and genomic DNA from normal ICIG-7 human cells or from a hybrid-induced metastasis, reproducibly gave rise to geneticin-resistant transfectants capable of producing spontaneous lung metastases. Neither transfectants nor transfectant-induced metastases harbored detectable human DNA sequences but all harbored pHSG 272 DNA. These results again call for caution in gene transfer studies of the metastatic process.
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PMID:Spontaneous metastatic potential of rat hepatocarcinoma cells after cell fusion or DNA transfection. 130 25

The author presents a case of metastatic hepatoma diagnosed at autopsy. The patient's liver had been nearly entirely replaced, and there were diffuse microscopic pulmonary metastases. Chest x-ray was normal at the time of gallium imaging for fever of unknown origin. Gallium imaging revealed a normal-appearing liver and mild, diffuse, bilateral increased uptake in the lungs. A CT scan 3 weeks before autopsy showed relatively minimal abnormality of the liver with a few areas of inhomogeneity and mild enhancement with contrast. Ultrasound-guided aspiration and liver biopsy were negative for tumor or infection. No case report or description of microscopic lung metastases from hepatoma seen with gallium was discovered in a recent literature search.
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PMID:Visualization of microscopic metastatic hepatoma to lung on gallium scintigraphy. 131 20

A 58-year-old man was admitted to our department because he had been diagnosed as hepatocellular carcinoma, which was located at S6 segment, and posterior segmentectomy was performed. After 6 months, right lung metastases of HCC were found and right bronchial arterial infusion of CDDP and MMC was performed twice. Dramatic effects were obtained such as disappearance of lung metastases. We emphasize the useful effect of CDDP and MMC for metastases of HCC.
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PMID:[Disappearance of lung metastases from hepatocellular carcinoma following bronchial arterial infusion of CDDP and MMC]. 132 18

P-Glycoprotein (Pgp) has been shown to mediate multidrug resistance in tumor cell lines. Overexpression of Pgp has been detected in clinical cancer samples of many histological types. The basis and biological significance of such increases in Pgp expression are not well understood. In this study, the expression of Pgp during stepwise progression to rat liver cancer was examined to investigate the possible role of Pgp in carcinogenesis. An immunohistochemical technique was used to detect Pgp at the single-cell level, in a large number of liver nodules, hepatocellular carcinoma, and in distant metastases of the carcinomas. The results showed that distinct changes in Pgp expression occurred during stepwise liver carcinogenesis and that these changes were closely associated with the microscopic anatomy of the lesions. In contrast to gamma-glutamyl transpeptidase and glutathione S-transferase-7.7, whose expression appeared to correlate with the early steps of liver carcinogenesis, Pgp expression was higher in the large hyperplastic nodules and in hepatocellular carcinomas than in the early microscopic lesions. A particularly striking finding was the consistent expression of Pgp in the lung metastases. These findings suggested that Pgp was associated with a more progressed malignant phenotype in liver carcinogenesis.
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PMID:P-glycoprotein expression during tumor progression in the rat liver. 138 36

To investigate therapeutic strategies for hepatoma, it is necessary to have a reproducible animal model with a tumor growth pattern allowing accurate assessment of results. Many techniques of intrahepatic tumor implantation (IHTI) have been devised for intrahepatic tumor models. Most of them, however, have the disadvantage of high rates of artificial tumor dissemination during tumor implantation, which interferes with the evaluation of therapy. To overcome this problem, we have developed a technique of IHTI in which a piece of Gelfoam is placed into a small incision in the liver for the purpose of both hemostasis and formation of a tension-free pocket to accept the tumor implant. In 583 ACI rats receiving IHTI with Morris hepatoma 3924A, the tumor take rate was 100%. Resembling the natural course of human hepatoma, the implanted tumor grows locally early in the course of disease and eventually invades the surrounding organs causing ascites and also metastasizes to the lung. Liver microangiography demonstrated that the tumor received blood supply mainly from the hepatic artery. This IHTI technique was also compared to two other methods of IHTI: insertion of fragments without using Gelfoam and implantation with a tumor cell suspension. A significantly lower rate of early lung metastases was achieved with our technique (0%) in comparison with other two techniques (41 and 80%). We conclude that this rat liver cancer model is reproducible and allows efficient evaluation of treatment modalities for liver cancer without interference from tumor at undesirable sites.
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PMID:A reproducible rat liver cancer model for experimental therapy: introducing a technique of intrahepatic tumor implantation. 153 93

A major interest of our laboratory is to delineate the pathways leading to experimentally induced liver cancer in the rat. Although the cellular progenitors of primary hepatocellular carcinoma remain controversial, current findings suggest that proliferation of chemically initiated liver epithelial cells gives rise to hepatic nodules, a rare population of which eventually progress to carcinoma. Presently, the availability of cell surface markers that are closely associated with malignant progression is needed for the identification, isolation, and further characterization of these rare malignant cells. In this paper, we describe two new monoclonal antibodies (MAbs), MAb 324.5 and MAb 324.9, that recognize a novel oncofetal membrane glycoprotein, designated TuAg1. MAbs 324.5 and 324.9 were produced using three different transplantable hepatocellular carcinoma cell lines during immunization and screening. MAb 324.5 and MAb 324.9 were shown to be reactive with different epitopes on TuAg1 by competitive immunoprecipitation assays combined with results from immunodepletion analysis and one-dimensional V-8 peptide maps. TuAg1 showed variations in molecular weight from 78,000 to 92,000, and a marked heterogeneity in pI, with charge variants ranging between 4.3 and 6.0. The 324.5-epitope was not expressed at detectable levels in any adult normal tissues or during liver regeneration but was transiently expressed during fetal liver development as shown by indirect immunofluorescence analysis of frozen tissue sections. In contrast, the 324.9-epitope was observed on nerve fibers and ganglia and on sperm tails in the adult rat and also appeared independently of the 324.5-epitope during fetal development. Although normal hepatocytes did not express TuAg1, isolated hepatocytes became positive during the first 24 h of primary culture. Attempts to modulate the in vitro expression of TuAg1 were unsuccessful; however, TuAg1 was lost within 7 days following ectopic transplantation of cultured hepatocytes into the pancreas. During the carcinogenic process, TuAg1 was expressed by a rare population of hepatic nodules, by many primary liver tumors, and by all lung metastases and transplantable hepatocellular carcinomas examined to date. Taken together, these observations suggest that the in vivo constitutive expression of this novel oncofetal membrane antigen is closely associated with acquisition of the malignant phenotype during hepatocarcinogenesis.
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PMID:Identification and characterization of a rat hepatic oncofetal membrane glycoprotein. 169 25


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