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Query: UMLS:C0027651 (tumor)
 685,946 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The metabolic mechanism for increased circulating free fatty acids in post-menopausal women with metastatic breast cancer was investigated. Hormone and metabolic response to glucose and growth hormone were compared to cancer patients and control subjects; thyroid, adrenal and pituitary function were evaluated. The results of these studies indicated that breast cancer patients had glucose intolerance and delayed and prolonged insulin secretion, increased basal growth hormone levels and insensitivity of adipose tissue to growth hormone. Cortisol and protein-bound iodine levels were normal and there was no lipolytic factor in the sera of breast cancer patients. The changes observed in breast cancer patients were not attributable to age, obesity, inanition or stress. These metabolic abnormalities may characterize host susceptibility to breast cancer or be effects of tumor.
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PMID:Metabolic parameters in women with metastatic breast cancer. 4 95

The reversibility of changes in ultrastructure, K+, and ATP content was studied in experimental injury of Ehrlich ascites tumor cells. Different grades of injury resulted from incubations in N2 atmosphere and omitting substrate after which air and glucose were reinstated. The changes observed in cells after 1 hour of anoxia such as dilations of endoplasmic reticulum, complex invaginations of plasma membrane, and slight condensation of mitochondria, as well as a drop of K+ and ATP content to a level approximating 40 per cent of the paired controls, were entirely reversible. After 2 hours of anoxia approximately 50 per cent of the cells recovered, but after 3 and 4 hour of anoxia most of the cells were irreversibly damaged showing markedly swollen mitochondria with flocculent densities.
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PMID:Studies of cellular recovery from injury. I. Recovery from anoxia in Ehrlich ascites tumor cells. 5 20

Twenty-three patients with stage III germinal neoplasia of the testis were treated with a variation of our original vinblastine-bleomycin program. This modification consisted of 0.4 mg/kg of vinblastine given in two fractions on Days 1 and 2 followed by continuous intravenous administration of 30 units of bleomycin in 1000 cc of 5% glucose and distilled water over a 24-hour period for 5 successive days beginning on Day 2. Therapy was repeated every 28-35 days as toxicity permitted. There were 17 responses, nine of which were complete (39%). Eight of the complete responses were in patients with massive disease in whom a low complete response rate was expected. Toxic effects consisted of severe leukopenia in 90% thrombopenia in 50%, and unexplained transient hyperbilirubinemia in about 30% of the patients. Bleomycin pneumonitis occurred in one patient and resulted in death. Hypertension was a new and unexpected side reaction experienced by four patients. Further trials are indicated since the complete response rate in patients with advanced massive disease appears to be improved.
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PMID:Continuous intravenous bleomycin (NSC-125066) therapy with vinblastine (NSC-49842) in stage III testicular neoplasia. 5 12

6 autopsy cases of primary leptomeningeal sarcomatosis are presented as a distinct nosological entity with a variable clinical picture and morphology in 5 males and 1 female. The clinical course from onset of symptoms till death ran for only a few weeks in most cases. 2 infants showed brain tumor symptoms and signs. 2 patients of advanced age presented a polyradiculoneuritic syndrome and 2 young adults had spinal cord compression symptoms and a mixed clinical form. In almost all cases, clinical symptoms and signs were for most of the course confined to one part of the neuraxis. The CSF was distinctly abnormal in all cases, showing elevated protein, depressed glucose and pleocytosis of variable extent. CSF sediment was investigated in 3 cases in all of which malignant tumor cells were found so a diagnosis of malignant meningeal tumor was made during life. Electron microscopy of CSF cells in 1 case confirmed the primitive character of the tumor cells. Complete autopsies revealed absence of any neoplasm outside of the CNS. Gross meningeal involvement was visible in all cases. Histologically, 3 tumor types were distinguished: polymorphic cell sarcoma, an undifferentiated form, and fibrosarcomatosis. Clinical data are analyzed in order to distinguish the condition from other neoplasms or infectious, especially tuberculous meningeal infiltrations. CSF cytology studies are considered the most useful step in clinical diagnosis. Neuropathological features are reviewed with stress on differentiation from malignant lymphomas of the CNS, diffusely spreading medulloblastoma, meningeal melanoblastosis and gliomatosis. The origin of meningeal sarcomatosis cells is briefly discussed. The use of the term "meningeal meningiomatosis" for this condition is deprecated.
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PMID:Primary leptomeningeal sarcomatosis. Clinicopathological report of six cases. 5 34

Both naturally occurring disease processes and experimental models of human disease in the Mongolian gerbil were reviewed. The gerbil was highly susceptible to cerebral infarction following unilateral ligation of one common carotid artery and was useful in studies of the pathogenesis of stroke. Spontaneous epileptiform seizures mimicked those of human idiopathic epilepsy, and both seizure-sensitive and resistant strains have been bred. Perhaps because of its more efficient nephron, the gerbil accumulated four to six times as much renal lead as the rat, and the gerbil has been proposed as an experimental model of lead nephropathy. On standard diets, about 10% of the animals became obese, and some showed decreased glucose tolerance, elevated serum immunoreactive insulin and diabetic changes in the pancreas and other organs. Some breeders exhibited hyperactivity of the adrenal cortex associated with hyperglycemia, hyperlipidemia and degenerative vascular disease. Although dietary supplements of cholesterol were toxic and did not induce atherosclerosis, the gerbil was useful in other studies of cholesterol absorption and metabolism. Spontaneous, insidious periodontal disease became evident after about 6 months on standard diets, and dental caries were induced by cariogenic diets or by pathodontic streptococci. Spontaneous neoplasia occurred in 8.4--24% of gerbils, usually after 2 years of life. Adrenal cortical, ovarian and cutaneous tumors were the most consistently reported neoplasms.
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PMID:The pathology of the Mongolian Gerbil (Meriones unguiculatus): a review. 9 95

Parenteral and enteral nutrition are being used as adjuncts to cancer therapy. A liquid diet formulation containing a 27% solution of glucose and 3.9% crystalline amino acids with electrolytes and vitamins was given continuously for a week via parenteral (iv), and via intragastric (ig) routes and also was given ad libitum via the oral or per os (po) route to groups of Buffalo rats with and without a Morris No. 7777 transplantable hepatoma to find out how these feeding procedures affect tumor-host interactions. Other groups of rats with and without the hepatoma were given solid food ad libitum. The following parameters were examined: mortality, carcass and organ weights, body and tumor growth, nitrogen balance, energy intake, fluid balance, urinalysis, hematology values, and serum protein levels. The results are considered with respect to the influence of the tumor on the host and the influence of the feeding procedure on the animal with and without a tumor. The presence of the hepatoma was associated with: higher mortality, a decrease in carcass mass, leucocytosis, anemia, a decrease in serum IgG, transferrin and albumin, and an increase in serum alpha fetoprotein. The iv and ig feeding procedures alone resulted in some mortality which was exacerbated by the presence of the tumor. Mortality was especially high in the tumorous rats on the ig feeding procedure. The degree of positive nitrogen balance and carcass mass was similar in non-tumorous rats fed the same liquid diet formula when given iv, ig, or po. Tumorous rats fed the liquid diet ad libitum showed anorexia and a significantly lower nitrogen balance. The iv and ig feeding of tumorous rats at a level which was well above those of the tumorous rats given solid or liquid diet ad libitum maintained the same degree of positive nitrogen balance as non-tumorous rats. Even though the iv feeding of tumorous rats maintained about the same degree of positive nitrogen balance as non-tumorous rats, these tumorous rats still suffered loss of carcass mass. It appears that the large rapidly growing hepatoma has priority for available nutrition over the host. It is further suggested that the rapidly growing hepatoma places an ever increasing demand on the available nutrients. Thus, a point is eventually reached where even supplemental nutritional support can no longer meet the needs of the growing hepatoma and the host.
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PMID:Tumor-host responses to various nutritional feeding procedures in rats. 10 99

The R3230AC mammary adenocarcinoma was not dependent on insulin; tumor growth was equal to or greater in diabetic rats than in intact animals. However, tumor growth was reduced when daily doses of insulin were administered. Treatment with estrogen inhibited growth of the R3230AC carcinoma, either in diabetic rats or in intact animals simultaneously treated with insulin. The effects of insulin plus estrogen treatment appeared to be additive in causing inhibition of tumor growth. Tumors from diabetic rats showed few metabolic alterations as reflected by little or no changes in the activities of selected glycolytic enzymes, pyruvate kinase, phosphofructokinase, and hexokinase, nor any striking changes in the activities of glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase, representing the pentose phosphate pathway. A modest reduction in the ratio of utilization of (1-14C)glucose: (6-14C)glucose was seen in vitro by tumors from diabetic rats. It was concluded that insulin, along with estrogen and prolactin, should be considered as a hormonal factor that influences growth of this automonous, hormone-responsive adenocarcinoma.
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PMID:Influence of insulin on estrogen-induced responses in the r3230ac mammary carcinoma. 12 68

Experiments concerning tumor transformation of plant cells or protoplasts need complete knowledge of the effects of media components. Here inhibiting effects of cellulase Onozuka, glucose, sucrose and mannitol (up to 0.3M), of tissue culture media, and of the antibiotic aureomycin on the tumor initiation process in Kalanchoe leaves are reported. Also the influence of these substances on the growth of the tumor inducing Agrobacterium tumefaciens is studied. The results lead to the design of conditions which should be favourable to in vitro transformation.
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PMID:[The influence of protoplast media on the tumor induction on kalanchoe leaves]. 12 95

We evaluated plasma growth hormone (GH) and plasma prolactin (PRL) levels in ten patients with metastatic carcinoid tumors and the carcinoid syndrome ("active tumors") and seven patients with metastatic carcinoid tumors without the carcinoid syndrome ("inactive tumors"). The patients with active tumors had elevated serum serotonin levels and increased urinary 5-hydroxyindoleacetic acid (5-HIAA) while these values were normal in patients with inactive tumors. Forty-five per cent of patients with active tumors had elevated fasting plasma GH levels that were either not suppressed or showed a paradoxical increase in response to I.V. glucose. There was a positive correlation between the plasma GH levels and serotonin production by the tumor. Twenty-eight per cent of patients with inactive tumors had elevated fasting plasma GH levels. GH levels were decreased by the administration of serotonin antagonists in some but not all of the patients. Parachlorophenylalanine (PCPA) an inhibitor of serotonin synthesis caused a paradoxical rise in GH levels. GH release in response to insulin hypoglycemia was normal. Plasma prolactin levels were normal in most of the patients with metastatic carcinoid tumors. PCPA administration did not systematically alter plasma prolactin levels. We conclude that elevated plasma GH levels are frequently present in patients with the carcinoid syndrome. Both serotonin produced by the tumors and the tumor itself may be responsible for the elevated GH levels.
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PMID:Growth hormone and prolactin secretion in the carcinoid syndrome. 12 43

Mucopolysaccharide was prepared from media in which the Gardner's lymphosarcoma cells were cultured. Multiple intraperitoneal injections of the preparation into syngeneic mice resulted in enhancement of the tumors which were inoculated prior to the injections. Sera of these hosts contained antibodies reacting with antigens of the outer layer of the tumor cells. Chemical analyses of the preparation showed that the mucopolysaccharide is composed of hexosamine, uronic, acid, hexose, and proteins. The mucopolysaccharide was shown to possess unique migration rate on electrophoresis and thin layer chromatography.
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PMID:Immunologic and chemical studies on mucopolysaccharide derived from murine lymphosarcoma. 13 74


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