Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0006142 (breast cancer)
 160,383 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Plasma prolactin was determined in a longitudinal study, where -9 manic-depressive patients were examined before lithium treatment and at various times during the treatment with the aim of unravelling a possible association between initial changes in water and sodium balance during lithium treatment and changes in plasma prolactin level. No significant changes were found, nor could any correlation between serum lithium and plasma prolactin be established. Some reports have indicated association between breast cancer and prolonged elevated plasma prolactin, such as is seen during treatment with phenothiazines and reserpine. In a transversal study, determination of plasma prolactin during long-term lithium treatment in 26 patients did not reveal any elevation compared with 16 controls. Lithium is accordingly not among the drugs which produce prolonged elevation of plasma prolactin.
 ...
PMID:Plasma prolactin during lithium treatment. 89 96

The inhibitory effect of selenium on the genesis of spontaneous mammary tumors in C3H mice is statistically significant even at toxic levels of selenium (5 and 15 ppm of Se in form of selenite added to the supply water), no evidence for stimulation of tumor growth by selenium has been obtained. Arsenite lowers the tumor incidence at higher dosage (80 ppm of As in supply water) as well, but animals developing tumors under these conditions demonstrate significantly enhanced tumor growth rates. The addition of subtoxic concentrations of zinc (200 ppm in form of ZnCl2) to supply water containing 5 ppm of Se abolishes the cancer-protecting effect of selenium. The latter result is of possible importance with respect to the human breast cancer mortality experience: The calculated dietary zinc intakes of average adults in 28 countries correlate with the female age-corrected mortalities from breast cancer directly, with P less than 0.005. The zinc concentrations in whole blood from donors in different parts of the U.S.A. are also directly correlated with the female breast cancer mortalities.
 ...
PMID:Inhibition of the genesis of spontaneous mammary tumors in C3H mice: effects of selenium and of selenium-antagonistic elements and their possible role in human breast cancer. 105 16

Two cases of advanced breast cancer treated with a water-salt extract from BCG are presented, showing a positive response -- marked and durable regression of the breast tumor and of the axillar metastases, parallel in the second case with a disappearance of lung metastases.
 ...
PMID:Therapeutic effect of a water-salt extract from BCG in two patients with advanced breast cancer. 109 68

Mammary tumorigenesis is augmented when C3H/Ou mice are fed diet ad libitum but delayed when calories are restricted by 40%. Three feeding experiments were done to evaluate the effect of ethanol on mammary tumorigenesis in isocalorically fed C3H/Ou mice: 1) ad libitum feeding of semipurified solid diet, with one group receiving 12% ethanol (15 g/kg/day) in the drinking water while controls received water alone; 2) isocaloric pair feeding of semipurified solid diet, with ethanol (4 g/kg/day) administered by gavage five time per week; and 3) isocaloric pair feeding of Lieber-DeCarli liquid diet, with one group receiving 29% of calories as ethanol (20 g/kg/day) in the diet. Despite administration of ethanol to isocalorically fed C3H/Ou mice for 65 weeks by three different methods, mammary tumor development was not enhanced. In two of the three ethanol-consuming groups, weight gain and mean body weight were less in the ethanol-consuming mice than in the controls, despite equal total calorie consumption. In only one ethanol-consuming group, where mice received ethanol as a 12% solution in the drinking water, was any difference noted in the tendency to develop mammary tumors. In this case, delay in tumorigenesis was apparent in the ethanol-consuming animals (p = 0.03). These findings do not support the hypothesis that ethanol calories augment the risk of breast tumorigenesis among breast cancer-prone mice consuming isocaloric diets. Instead, reductions in weight gain and body weight among ethanol-consuming mice and an apparent reduction in mammary tumorigenesis in one of three experimental groups suggest that ethanol may decrease metabolic utilization of calories and hence contribute to lowered energy availability.(ABSTRACT TRUNCATED AT 250 WORDS)
 ...
PMID:Ethanol calories do not enhance breast cancer in isocalorically fed C3H/Ou mice. 129 98

California has 12% of the U.S. population. In 1991, the newly diagnosed cancer cases in California represented 10% of all new cancer cases in the country, and the yearly toll was 10% of all cancer deaths. Relative to all new cancer cases in the U.S., California had 10, 9.8, 9.8, and 9.3% of breast, lung, prostate, and colorectal cancers, respectively. Because of its large population and cancer incidence, the epidemiology of cancer in California is of particular interest. Epidemiological factors reviewed in this article include ethnicity, lifestyle, occupation, and environmental conditions. Ethnic factors: There is an increased incidence of cervical and gallbladder cancer among Hispanic women, and of stomach cancer in Hispanic men and women. In U.S.-born Chinese men, the most prevalent cancers are those of the lung and colon, which is also seen in American white men. In U.S.-born Chinese women, there is an upward displacement of breast cancer incidence. In U.S.-born Japanese men and women, the mortality rate is closer to that of American whites. Life-style: Members of the Mormon Church and Seventh-Day Adventists have only 50% of the U.S. standardized mortality rate for cancer associated with smoking. Increased coffee consumption has been found to be associated with increased occurrence of colon and bladder cancer; alcohol use has been reported to have a positive association with colorectal cancer. The large AIDS population in San Francisco has a 144-fold odds ratio of Kaposi's sarcoma and a fivefold odds ratio of lymphoma when compared with the general U.S. population. Occupational factors: An increased incidence of mesothelioma in asbestos workers, of gastric cancer, skin cancer, and lymphoma in men working in dusty environments, and of astrocytoma in individuals with prolonged exposure to low-frequency electric and magnetic fields has been recorded. Environmental factors: The drinking-water pool in northern California is contaminated with asbestos of the serpentine type, which is associated with mesothelioma of the peritoneum and carcinoma of the lung, gallbladder, and pancreas. Petrochemical fumes in the heavily industrialized San Francisco Bay area have not been associated with an increased occurrence of cancer. No significant incidence in cancer has been noted in the counties surrounding the nuclear power plant at San Onofre during 18 years of close observation.
 ...
PMID:Epidemiological factors of cancer in California. 146 11

The calcium channel antagonists (CCAs) amlodipine, diltiazem, and verapamil inhibited HT-39 human breast cancer cell proliferation in a concentration-dependent manner. The apparent 50% inhibitory dose values were 1.5 microM for the dihydropyridine amlodipine, 5 microM for the benzothiazapine diltiazem, and 10 microM for the phenylalkylamine verapamil. Amlodipine treatment caused a rapid concentration-dependent decrease of intracellular calcium concentration in the HT-39 cell line. Addition of 1 microM amlodipine had no effect on intracellular calcium levels, 3 microM amlodipine lowered intracellular calcium levels in the HT-39 cells by 13.7%, and 10 microM amlodipine lowered intracellular calcium levels by 33.2%. Also, lowering medium calcium levels from 2.0 mM to 0.5 microM resulted in a rapid 41.3% decrease in intracellular calcium and a concomitant 60% inhibition of HT-39 cell DNA synthesis. When HT-39 cells were transplanted into athymic mice, marked hypercalcemia developed. Serum calcium levels from control mice were 8.3 +/- 0.6 mg/dl (mean +/- SE; n = 4); those from tumor-bearing mice were 11.3 +/- 0.08 mg/dl (mean +/- SE; n = 17). Blood calcium levels correlated directly with tumor size (r = 0.91, P less than 0.01). We examined the capacity of three CCAs to specifically inhibit HT-39 tumor growth in vivo. One week after inoculation of HT-39 cells, mice were acclimated to vehicle or 0.1 mg/day amlodipine, 1.0 mg/day diltiazem, or 1.0 mg/day verpamil, in their drinking water, for 7 days. Oral administration of the dihydropyridine amlodipine (0.35 mg/day) for 10 days inhibited HT-39 breast tumor growth by 83.5 +/- 20.1% (mean +/- SE). Oral administration of diltiazem (3.5 mg/day) inhibited HT-39 breast tumor growth rate by 46.5 +/- 6.6% over a 2-week measurement period, and verapamil (3.5 mg/day) inhibited tumor growth rate by 68.2 +/- 9.7% (mean +/- SE). The CCAs had no effect on mouse body weight or gross organ morphology at the concentrations used. Lack of depolarization-induced calcium fluxes in the HT-39 cell line suggests that these cells do not express voltage-operated calcium channels. Thus, our study correlates an effect of amlodipine to lower intracellular calcium levels, by a mechanism not known at present, with its effect to inhibit HT-39 cell proliferation. These findings are important since they demonstrate that amlodipine and other CCAs with known pharmacodynamics and side effects act to blunt breast tumor progression in vivo.
 ...
PMID:Inhibition of cancer cell growth by calcium channel antagonists in the athymic mouse. 153 73

Radiation treatment of breast cancer with high-energy X-rays in breast conserving therapy tends to an under-dosage of the skin region. Results of our measurements with patients and in water demonstrate that the skin receives only 40% of the reference dose applying tangential opposed wedged fields with 6 MV X-rays. Doing so we must accept a dose inhomogeneity of about 60% in the target volume. That may cause an increased recurrence rate especially for superficially situated tumors and/or in the case of intraoperatively disseminated tumor cells. We show that utilizing bolus material of only 5 mm water equivalence on the skin above the tumor bed reduces the dose inhomogeneity to 8%.
 ...
PMID:[The surface dosage in the radiotherapy of a small breast carcinoma with 6-MV x-rays. A contribution to quality assurance in radiotherapy]. 159 65

There is considerable evidence from epidemiological studies that even moderate dietary alcohol intake increases the risk of breast cancer in women. The aim of this study was to test the hypothesis that dietary alcohol intake increases the incidence of mammary carcinoma in a rodent model. Two matched groups of female Sprague-Dawley rats were given 7,12-dimethylbenz[a]anthracene 15 mg by gavage when 50 days old. One group of 20 animals was given dietary ethanol at a dose of 4.4 g/kg/day in their drinking water. The incidence of tumors was significantly less in the group given ethanol (P less than 0.001). In those developing tumors, there was no significant difference between the two groups in the mean number of tumors per animal, the tumor growth rate or the time to the appearance of the first tumor. This study fails to support the hypothesis established by previous epidemiological studies.
 ...
PMID:Dietary alcohol intake does not increase the incidence of experimentally induced mammary carcinoma. 160 37

The ability of commonly used operative lavage solutions to destroy breast cancer cells was investigated. The cytotoxicity of solutions of Savlon, noxythiolin, povidone iodine, hydrogen peroxide, bleomycin and water on two human breast cancer cell lines was measured in vitro. Viable cells were determined by ability to exclude trypan blue. Results have been analysed with standard non-parametric tests and demonstrate that all solutions tested significantly (P less than 0.01) reduced the number of viable cells recovered when compared with a control solution of phosphate buffered saline. Solutions of Savlon, 2.5% noxythiolin and povidone iodine were more effective than the other agents in reducing the number of recovered viable cells.
 ...
PMID:The activity of locally applied cytotoxics to breast cancer cells in vitro. 170 17

Primary prevention of cancer requires control of both involuntary and voluntary exposures. Involuntary exposures include carcinogens in air and water, and various forms of radiation. Often these exposures are difficult to characterise individually and difficult to study epidemiologically. Although it is unlikely that they account for more than a small proportion of cancers, it is important that we refine our techniques of study to facilitate their control. Voluntary (lifestyle) exposures are responsible for the majority of cancers. In many developed countries, tobacco accounts for approximately 30% of cancer deaths, and major public health endeavours are justified to reduce this toll. Dietary factors may be as important, with dietary fat the most important risk factor, vegetables and fruits being protective. In several studies, including a cohort study in Canada, dietary fat increases breast cancer risk, though other studies have been negative. The evidence for fat increasing the risk of colorectal is more consistent. Epidemiology has shown that secondary prevention of cancer is applicable by screening for breast cancer with mammography with or without physical examination in women age 50-69, and screening for cervix cancer in women age 25-60 with cervical cytology. Organised screening programmes are essential to ensure that a high proportion of women are screened, and that the tests are high quality with adequate quality control. Under these circumstances screening every 2 years for breast cancer and every 3 years for cervix cancer is cost-effective. Screening for other cancers cannot be recommended currently. There is a time to effect that must be recognised in planning primary or secondary prevention. Full effect of most primary activities will not be achieved for decades, screening may require a decade. Available knowledge must be applied now, however, to ensure the effect will eventually be seen, as is now occurring in some countries with the downturn in lung cancer mortality following smoking reduction in men.
 ...
PMID:Epidemiological approaches to primary and secondary prevention of cancer. 170 41


1 2 3 4 5 6 7 8 9 10 Next >>