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Query: UMLS:C0546837 (esophageal cancer)
 8,907 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Fifty-three patients had pharyngolaryngoesophagectomy during the years 1965 to 1976 for lower hypopharyngeal or cervical esophageal cancer. The operative mortality--defined as the percent of patients who died within seven days of operation--was 7.5%, which is reduced to 5.6% if one patient with inoperable disease is excluded. Twenty-eight percent of patients survived for longer than one year, and there have been no problems with swallowing. Communication is possible in every patient who possesses good motivation, but the problems of long-term management of calcium metabolism still require attention.
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PMID:Rehabilitation problems after pharyngogastric anastomosis. 64 15

A retroviral vector, called pDAM3, containing the neomycin resistant gene and the antisense human c-myc gene fragment (the third exon and 3' flanking sequence) was constructed. pDAM3 was introduced into amphotropic packaging cells PA317 by the calcium phosphate precipitation method. Several G418-resistant PA317 clones were isolated. The virus titer of these cell lines was determined by infectivity of their culture fluid to NIH/3T3 cells. The highest titer obtained was 8 x 10(5) G418-resistant colony forming units/ml. Clonal and pooled G418-resistant PA317 colonies with high titers were expanded and analyzed by Southern blot for the presence of intact viral sequences. All cell lines were found to harbor the internal sequences of the pDAM3 vector without any rearrangement. Recombinant virus DAM3 infected human esophageal cancer cell line EC8712 efficiently. The DAM3-infected EC8712 (called EC-DAM3) was found to contain the full DAM3 sequence (4.8 kb) by Southern blot analysis. Antisense myc RNA expressed in the EC-DAM3 cell was detected by RNA hybridization. Further studies indicated that [3H]-thymidine incorporation in EC-DAM3 cells was reduced by 45% in average compared to that in untreated EC8712 cells. Growth rate of EC-DAM3 cells also decreased about 50%. DAM3-infected EC8712 cells lost their ability of forming tumor in nude mice. It thus appeared that the antisense myc gene introduced into EC8712 cells via retrovirus vector was capable of inhibiting cell proliferation and malignancy.
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PMID:Retrovirus mediated transfer of antisense human c-myc gene into human esophageal cancer cells suppressed cell proliferation and malignancy. 131 26

To explore the relation between esophageal cancer and dietary trace elements in humans, we estimated the average daily intake of zinc, copper, iron, selenium, molybdenum, silicon, cadmium, and nickel in 21 Chinese communes, where the annual mortality rate from esophageal cancer among the population 30 years of age and over ranged from 0 to 495/100,000 person-years. We also estimated the relative level of calcium consumption. Zinc and copper intake were inversely related to esophageal cancer mortality, and calcium intake levels was positively related to esophageal cancer mortality. The predicted esophageal cancer mortality among a vegetarian population with a high level of dietary calcium and a low level of dietary zinc was 5.3 times as high as that in a vegetarian population with a low level of dietary calcium and a high level of dietary zinc. The influence of a high level of dietary calcium in a vegetarian population may be explained by a reduction in the absorption of dietary zinc.
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PMID:Dietary trace elements and esophageal cancer mortality in Shanxi, China. 139 Nov 31

A randomized double blind intervention trial was carried out in Huixian County Henan Province, a high risk area for esophageal cancer, to observe the effect of oral calcium supplementation on esophageal precancerous lesions. Two hundred and fourteen cases with basal cell hyperplasia and 40 with dysplasia of the esophagus aged 25-75 randomly received daily oral supplementation of 600 mg calcium or placebo for 7 months. In the calcium supplementation group, the basal cell hyperplasia and dysplasia of the esophagus were significantly improved and the profile of esophageal epithelial proliferation cells labeled with 3H-TdR approached that of the normal subjects in low risk area for esophageal cancer. The results indicate that calcium supplementation can inhibit basal cell hyperplasia and dysplasia of the esophageal epithelium in high risk area for esophageal cancer. The mechanism of interruption of esophageal precancerous lesions by calcium is discussed.
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PMID:[Effect of added dietary calcium on human esophageal precancerous lesion in the high risk area for esophageal cancer--a randomized double blind intervention trial]. 227 21

This study of 178 cases of cancer of the esophagus from three counties in western New York, as compared with sex- and age-matched neighborhood controls in 1975-1986, replicated some earlier findings, particularly with regard to the increased risks associated with use of cigarettes and alcohol. The concentration of alcohol in an alcoholic beverage apparently did not affect risk: Beer carried a substantial risk, whereas less-dilute forms of alcohol carried no risk. These findings also suggest that the risk of cancer of the esophagus increases with ingestion of foods containing retinol but not carotene. Although increased risks were found to be associated with increases in total calories and fat ingested, as well as calcium, they appeared to be confounded with the risk associated with retinol, as distinct from carotene. Inasmuch as a difference in risk associated with retinol and carotene has been shown in a few previous inquiries dealing with esophageal cancer and cancer at other sites, a need for further investigations distinguishing risks associated with the two compounds is apparent.
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PMID:Nutritional epidemiology of cancer of the esophagus. 230 55

Between January 1980 and December 1982, 183 patients with histologically confirmed carcinoma of the esophagus who were referred to a tertiary referral hospital were studied. Thirty-two (17%) patients were referred from Gassim Region at the north central part of Saudi Arabia. In contrast, only 5% of total cancer patient referrals were from this area. A case-control study showed a significant regional difference within Saudi Arabia and the most referrals from Gassim area. A prospective case-control study showed persistently high numbers of referrals from that region during 1983-1987. When patients from Gassim Region were compared with those referred from other locations, no statistical differences were noted between the two groups except for the source of drinking water. Water analysis from Gassim area showed a high solid content with elevated levels of calcium, magnesium, and to a lesser extent, chromium iron, cadmium, and cobalt. Traces of petroleum oil were found in five of six water samples from Gassim during 1983, compared with 3 of 49 samples from other areas. Mutagenicity tests on water specimens form Gassim Region indicated the presence of possible carcinogens. It is being suggested that the high prevalence of esophageal cancer in this region may be related to contamination of water by impurities such as petroleum oils. Malnutrition, particularly vitamin A deficiency, as well as other factors may have promoted such malignancies.
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PMID:Water contamination and esophageal cancer at Gassim Region, Saudi Arabia. 232 7

This paper provides an overview of our knowledge on the involvement in cancer of vitamins A, C and E and of calcium, selenium and zinc. This work is a background for studies on dietary magnesium's effects on cancer. Consumption of vitamin A and its dietary precursors has been associated with reduced cancer at several sites in human and animal studies. Carcinogenesis studies using several models of cancer have been conducted on the influence of vitamin A deficiency, vitamin A excess and supplementation of vitamin A analogues. Vitamins C and E are effective in the prevention of N-nitroso compound (nitrosamine) formation. Vitamin C is effective in aqueous and vitamin E is effective in non-aqueous media. Both of these vitamins also have inhibited carcinogenesis by preformed carcinogens at several sites, but enhancement has been observed at some sites when excess vitamin treatment was studied. The potential role of calcium in the prevention of colon cancer is being pursed. Few experimental studies have been conducted but data support an effect of calcium on colonic epithelial proliferation. Epidemiological and especially experimental results suggest an inhibition of cancer by dietary selenium. In animal studies, selenium supplementation has been particularly effective in inhibiting colon and mammary carcinogenesis, but enhanced carcinogenesis was observed in some studies on skin, liver and pancreas cancer. Data suggest that zinc deficiency may be a factor in esophageal cancer; however, studies on tumor growth have demonstrated retarded tumor growth in zinc-deficient animals.
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PMID:Effects of the intake of selected vitamins and minerals on cancer prevention. 266 27

The transforming gene in human esophageal carcinoma (HEC) tissues collected from Lin-xian county, a high incidence area of esophageal cancer was studied. Eight primary HEC tissues were used as sources for the preparation of DNA. High molecular weight DNAs were separately added to NIH 3T3 cells by the calcium phosphate coprecipitation method. Of the 8 HEC tissues examined, 3 DNAs showed transforming activity and produced secondary transformants. The use of uncloned NIH 3T3 cells resulted in the appearances of non-transforming. The efficiency of primary transfection foci was low (0.025--0.05 focus per ug of DNA). In the secondary transfection, the efficiency was increased (0.30 focus per ug of DNA). The primary and secondary transformants were capable of forming colonies in soft agar (0.33%) in contrast to the control NIH 3T3 cells, which did not show any anchorage-independent growth. About 1 X 10(6) cells of the cloned secondary transformants were injected subcutaneously into athymic BALB/c nude mice. The mice developed large tumors (approximately 20-30 mm in diameter) within 5--15 days after injection. No tumor developed in mice injected with control NIH 3T3 cells even after 2 months. The transforming DNA had a linkage to the Alu sequence, indicating that a common human DNA fragment is conserved in the tumors. H-ras was found in the transforming DNA using Southern blot assay.
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PMID:[Transforming gene in human esophageal carcinoma tissue]. 324 97

Nutritional status indicators were assessed chemically in blood and urine taken from 625 Transkeians drawn from three age-groups in each of two regions: one with a moderate risk for esophageal cancer and one with a very high risk. Aggregate mean values for protein, albumin, vitamin A, and phosphorus were generally acceptable, but many subjects had inadequate (though not necessarily deficient) values for nicotinic acid (74% of subjects), magnesium (60%), vitamin C (55%), carotene (53%), riboflavin (41%), calcium (35%), and zinc (27%). Groups at highest risk for esophageal cancer had markedly lower serum magnesium and carotene concentrations and mildly depressed hemoglobin and hematocrit values, but such findings are not necessarily associated with esophageal cancer etiology. Possible intestinal malabsorption in the populations at highest risk may be associated with the unusually high fiber and phytate intake of the high-risk populations as well as with exposure to necrotizing mycotoxins. Thus, while protein and energy nutriture seem generally adequate, both the high- and moderate-risk populations had high incidences of multiple micronutrient malnutrition.
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PMID:Nutritional status of African populations predisposed to esophageal cancer. 684 45

A population-based case-control study was conducted in western Washington state to investigate possible dietary risk factors for laryngeal, esophageal, and oral cancers. Using results from a food frequency questionnaire, past dietary intakes of iron, zinc, and calcium were estimated for 661 cases and 466 controls. Clippings were also taken from the nails of both halluces to determine concentrations of iron, zinc, calcium, chromium, and cobalt in 507 of the cases and 434 of the controls. After adjustment for smoking, alcohol, and dietary beta-carotene and vitamin C intake, individuals who reported dietary intakes of iron and zinc in the upper quartile were less likely to develop cancers of the larynx and esophagus than were individuals with intakes in the lowest quartile [odds ratios (OR), 0.5 for iron and 0.1 for zinc]. However, there were no significant differences in zinc concentrations in nail tissue between subjects with these types of cancer and controls. Esophageal cancer cases had higher nail concentrations of iron and calcium than did controls (OR, 2.9 for high versus low quartiles of iron; OR, 2.6 for high versus low quartiles of calcium). Individuals who developed esophageal or oral cancer were more likely to have elevated cobalt concentrations in their nail tissue than were individuals without cancer (OR, 9.0 and 1.9 respectively, for high versus low quartiles). The results of this study suggest that there may be differences in mineral intake or metabolism between individuals who develop some carcinomas of the upper aerodigestive tract and those who do not.
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PMID:A case-control study of element levels and cancer of the upper aerodigestive tract. 834 53


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