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)

The HCG and AFP have been quantitated in the sera of 130 patients with the diagnosis of testicular seminoma utilizing a specific double antibody radioimmunoassay. These tumor markers also were localized in tumor cells of some of these patients utilizing an indirect immunoperoxidase technique. 11 of 130 patients had elevated serum levels of HCG. The HCG molecules have been localized in the syncytiotrophoblastic giant cell (STGC) that is occasionally observed in seminomas. None of the patients with pure seminoma had an elevated level of serum AFP. We have concluded that in patients with pure seminoma the level of serum HCG can be elevated (10 of 130 or 7.6%), but we have not observed elevated serum levels of AFP in these patients.
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PMID:Human chorionic gonadotropin (HCG) and alpha-fetoprotein (AFP) in sera and tumor cells of patients with testicular seminoma: a prospective study. 8 87

An analysis was made from a histopathological and clinical standpoint of 6 cases of yolk sac tumor over a period of 15 years, treated in the first surgical department of the University of Hokkaido. All these cases, with the exception of one retroperitoneal tumor, were diagnosed as embryonic carcinomas before the study. AFP were examined throughout the duration of treatment and their levels reflected changes corresponding to the effects of treatment and recurrence. They were seen in the form of special fluorescence in the tumor cells using the antibody immunofluorescence method. Radiotherapy and chemotherapy may be effective, but the prognosis of these tumors is poor. Amongst the cases mentioned, only the child with a tumor of testicular origin is in good health.
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PMID:[Yolk sac tumor (author's transl)]. 8 5

In several prospective studies during the past 5 years, we evaluated 400 patients with nonseminomatous and 60 with seminomatous testicular tumors with the use of serum and cellular AFP and HCG at the NCI. Ninety percent of the patients with nonseminomatous testicular tumors had elevated levels of either HCG and/or AFP that have been useful in detection, staging, prognosis, and monitoring the efficacy of the therapeutic modalities. Although 5% of the patients with pure seminoma had an elevated level of serum HCG, one must search for elements of nonseminomatous testicular tumor in these patients by serial section of the seminoma specimen. Elevated serum AFP in patients with designations of seminoma indicates the presence of an element of embryonal carcinoma and/or teratoma. We have localized these markers in various tumor cells by using the technique of indirect immunoperoxidase. The HCG is localized in syncytiotrophoblastic component of choriocarcinoma and syncytiotrophoblastic giant cells occasionally found in association with embryonal carcinoma, teratoma, and seminoma. The AFP is localized in embryonal and endodermal sinus tumor.
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PMID:Immunochemical determination of human chorionic gonadotropin and alpha-fetoprotein in sera and tumors of patients with testicular cancer. 8 62

The new radioimmunoassays for AFP and beta-HCG are highly specific for nonseminomatous, germ-cell testicular tumor in genitourinary patients who do not have liver disease or other cancers. When used together, they are an accurate and sensitive indicator of metastases and are helpful in determining the effectiveness of therapy. However, they are not very useful in the differential diagnosis of scrotal masses.
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PMID:Serum alpha-fetoprotein and human chorionic gonadotropin in the management of testicular tumors. 8 63

Five rat yolk sac tumor cell lines were cloned from a yolk sac tumor line which originally arose following fetectomy. The doubling time of each of the cloned tumor lines was about 50 h. All of the cloned tumor cell lines synthesized and secreted AFP and albumin but there was a gradual decrease in the synthesis of these proteins during serial passage. The cells formed clusters which looked like vitelline ducts or the parietal yolk sac and they also had basement membranes which closely resembled Reichert's membrane. When the cloned cell lines were cultivated in the presence of 1 mM dibutyryl cyclic-AMP, myotube-like and neuron-like cells appeared. Acetylcholine esterase and creatine phosphokinase activity were present when myotube-like cells were present whereas acetylcholine esterase activity predominated when neuron-like cells were present.
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PMID:The differentiation of clonal rat yolk sac tumor cell lines cultivated with dibutyryl-cyclic 3', 5'-adenosine monophosphate. 9 Jun 64

Tansplantability, growth, morphology, and function of xenotransplanted human tumors, such as carcinomas of the lung, liver, breast, choriocarcinoma, and blastomas of the liver, lung, kidney, and uterus, are described. From the tumor take rate, it is clear that xenotransplantation cannot be used for the study of every human tumor: slow-growing tumors are difficult to analyze, and functioning adenomas and low-grade malignant carcinomas are at present almost impossible to study by this approach. From the authors' transplantation experience, tumor antigenicity to nude mice with no T-cell function, either tumor specific or species specific, was suspected. Therefore, the growth in nude mice may not equate to that in the human body. The stroma of the transplanted tumor, which is most likely of mouse origin, might also alter the growth rate, as it did the histology of some tumors. Another possible hindrance that has not been described in the text is the mouse endogenous virus. Serially transplanted human tumors are often infected with C particles, which could well influence the tumor growth and character. In spite of the presence of some factors unfavorable for the study of human tumors through xenotransplantation, it has, nevertheless, been clearly shown that the nude mouse/human tumor system is a very useful tool for functional analysis of tumors in relation to growth, differentiation, and morphology, such as eutopic or ectopic production of various hormones, AFP, normal serum proteins, colony-stimulating factor, erythropoietin, and so on. This system can be employed to elucidate the production of many other biologically active and inactive substances by a variety of tumors and their effects on the host in the future and should provide better understanding of human cancers. Attempts to induce differentiation and to change the biologic behavior of xenotransplanted human malignant tumors have failed so far, except for induced dormancy of breast carcinoma under unfavorable hormonal conditions. This line of investigation may have particular import on cancer research, particularly in relation to the biology and treatment of human cancers.
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PMID:Growth, morphology, and function of xenotransplanted human tumors. 9 41

A case of embryonal cell carcinoma of the testes with widespread metastases, and the presence of AFP in the patient's serum, is reported. The usefulness of the detection of AFP for the diagnosis of this type of tumor is stressed. The use of polyacrylamide disc electrophoresis in combination with double-diffusion in gel are considered as a highly sensitive method for the detection of AFP in routine clinical work. The literature dealing with the characterization of AFP and its frequency and significance in various diseases is reviewed.
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PMID:Alpha-fetoprotein in a patient with embryonal cell carcinoma of the testes. 80 96

We examined 35 untreated patients with unresectable hepatocellular carcinoma who exhibited positivity for both plasma PIVKA-II and serum AFP, and studied the weekly course of these markers from the pre-TAE or -HAI period to the third week of treatment. We correlated changes in these markers with the tumor necrosis rate and the time course on X-ray CT images. One week after TAE, the tumor necrosis rate and the time course of PIVKA-II showed a significant correlation (r = 0.7), while the correlation was between the time course of AFP and the tumor necrosis rate was insignificant (r = 0.2). At two and three weeks after TAE, both the time course of AFP and PIVKA-II showed significant correlations with the tumor necrosis rate. In 16 patients with tumor necrosis rates of not less than 90%, the mean of the actual half-life (AHL) of PIVKA-II was 3.2 days, the shortest was 1.83 days, and 75% of all AHLs clustered from two days to four days, while the mean and shortest AHLs of AFP were six days and 2.98 days, respectively, exhibiting a broader distribution. On the other hand, in three out of the nine cases of hepatocellular carcinoma complicated with portal tumor thrombi, PIVKA-II increased after HAI in spite of a reduction in tumor size. It was suggested that the PIVKA-II level requires careful interpretation in cases of portal vein obstruction after intensive hepatic arterial infusion of anticancer agents.
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PMID:Time courses of PIVKA-II and AFP levels after hepatic artery embolization and hepatic artery infusion against hepatocellular carcinoma: relation between the time course and tumor necrosis. 127 48

After 12 days of culture, VX2 carcinoma cells were inoculated into the liver of 16 rabbits; 14 days later, 131I-labeled iodized oil ([131I]-Lp) suspended in lipiodol was injected into the hepatic artery. Selective accumulation of the contrast material in the tumor for an extended time was evident on X-rays and hepatic scintiphotographs. The antitumor effect was remarkable. [131I]-Lp agents warrant further examination for their clinical usefulness. Internal radiation therapy by transcatheter hepatic arterial injection of [131I]-Lp (group A) was evaluated in 9 patients with hepatocellular carcinoma (HCC, tumor stage III or IV) associated with liver cirrhosis (LC) and compared with combination therapy of Lp-TAE (group B) in 18 patients with HCC (tumor stage III or IV) associated with LC. In group A, serum AFP levels dropped rapidly in eight of the nine patients who had an elevated initial level of more than 500 ng/ml. The average reduction in tumor size was 50% in eight cases as determined by computed tomography. Histological examination of one resected liver specimen at 3 months after the third injection of [131I]-Lp revealed microscopic features highly suggestive of a radiation effect in the [131I]-Lp-containing area. The 1-year survival value for patients with HCC was estimated at 49.0% using the Kaplan-Meier method. The survival of patients treated with internal radiation therapy tended to be better than that of those treated with Lp-TAE (P = 0.119).
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PMID:Treatment of hepatocellular carcinoma by transcatheter hepatic arterial injection of radioactive iodized oil solution. 128 Oct 43

The Hokkaido Liver Cancer Study Group focused on the changes in PIVKA-II levels observed in 61 HCC patients after several regimens of treatment in comparison with the AFP levels and the pathophysiological characteristics of HCC. The overall positivity rate for PIVKA-II was 47%, and there was no correlation between the PIVKA-II values and the AFP levels. Accordingly, the HCC detection rate was increased by about 20% by the measurement of both markers. In all, 13 patients underwent hepatic resection, and nonsurgical therapy was carried out in the other 48 subjects. Of the 6 surgically treated patients, 5 (83%) showed a fall in PIVKA-II levels to the normal range immediately after surgery, whereas 14/29 (48%) subjects receiving nonsurgical treatment showed a decrease in PIVKA-II values. Although inconsistency between these tumor markers was detected in four treated cases, we concluded that assay for both of these two parameters may expand their clinical utility for the diagnosis of HCC and monitoring of patients after treatment.
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PMID:Changes in the plasma abnormal prothrombin level following treatment of hepatocellular carcinoma. 128 Oct 44


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