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Query: UMLS:C0242379 (lung cancer)
 71,905 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

With the aid of specific monoclonal antibodies, tumor tissues from 68 patients with lung cancer were examined for their expression of two small cell lung carcinoma (SCLC) antigens, Fuc-GM1 (fucosyl GM1; IV2FucII3NeuAc GgOse4) and neural-cell adhesion molecule (NCAM), and two broader tumor antigens, carcinoembryonic antigen (CEA) and carbohydrate cancer-associated antigen CA 50. Expression of Fuc-GM1 was seen in 75% and NCAM in 78% of the SCLC specimens, but also in 12 and 20% of non-SCLC. Either or both of these antigens were expressed in more than 90% of SCLC and in 25% of non-SCLC. CEA was found in more than 80% of SCLC and non-SCLC. Expression of CA 50 was seen in 65-68% of non-SCLC and SCLC, showing preference for SCLC and lung adenocarcinoma. In SCLC, cellular expression of Fuc-GM1 was generally seen together with NCAM and CA 50, but rarely with CEA. There was considerable inter- and intratumor heterogeneity in the expression of all four antigens. The results suggest that CEA is the antigen of choice for the detection of lung cancer regardless of histotype. In combined analysis of CEA, CA 50, Fuc-GM1 and NCAM, two patterns of antigen expression were recognized that appear to discriminate between SCLC and non-SCLC tumors, respectively. A considerable fraction of SCLC and non-SCLC tumors, however, exhibited similar patterns of antigen expression. The biological and clinical significance of these observations remains to be investigated.
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PMID:Coexpression of ganglioside antigen Fuc-GM1, neural-cell adhesion molecule, carcinoembryonic antigen, and carbohydrate tumor-associated antigen CA 50 in lung cancer. 133 98

An epidemiological cohort study has been carried out to demonstrate any excess cancer mortality in a group of French uranium miners who worked underground for at least 2 years. The latency period of cancer associated with this type of professional exposure was long (10 to 20 years). The first study includes miners who began underground mining between 1946-1972. The individual monthly exposure to radon and its decay products has been recorded since 1956. The exposure of the first 10 years had to be estimated retrospectively for each miner regarding the working conditions. Problems associated with these two different exposure recordings are discussed. The results revealed an excess of lung cancer mortality for miners who had begun underground mining during the years 1946-1956.
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PMID:Epidemiological study of French uranium miners. 145 6

The sialosyl-Tn (STn) antigen is a mucin-associated carbohydrate antigen expressed by a variety of adenocarcinomas. In the colon, expression of this antigen has been associated with a poor prognosis, independent of tumor stage or histology. The present study was performed to determine whether this adverse clinical outcome might be due to an interaction between STn-positive mucin and natural killer (NK) cell cytotoxicity. Ovine submaxillary mucin (OSM), a mucin highly rich in STn antigen, partially inhibited NK cell cytotoxicity against K562 target cells, but only at high concentrations. Low concentrations of OSM were not inhibitory but became markedly inhibitory in the presence of ammonium ions. Two other STn-positive submaxillary mucins also markedly inhibited NK cytotoxicity when combined with ammonium ions. Removal of sialic acid from OSM reversed the OSM/ammonium-mediated inhibition of NK cell activity. Unlike the submaxillary mucins, two mucins derived from human breast and lung cancer cells which lack the STn antigen, did not inhibit NK cell activity in this system. Likewise, four other non-mucin glycoproteins which lack STn expression did not inhibit NK cells despite having levels of sialic acid that were, in some cases, comparable to submaxillary mucin. These results indicate that mucins bearing the cancer-associated STn antigen can effectively inhibit NK cell cytotoxicity in the presence of ammonium ions. While this NK cell inhibition is likely to be caused by ammonium, mucin markedly enhances this effect, thereby implicating a novel immunomodulatory property of mucin.
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PMID:Mucins bearing the cancer-associated sialosyl-Tn antigen mediate inhibition of natural killer cell cytotoxicity. 151 39

The SHIN-3 cell line producing CA125 was established from an ovarian cancer patient. Using the SHIN-3 cell line, we found that the low-molecular-mass antigen (about 50 KDa) might be the main antigenic determinant in CA125-immunoreactive species. A new monoclonal antibody to this low-molecular-mass was raised to examine a new cancer associated antigen by a hybridoma technique. Using enzyme linked immuno sorbent assay, ten clones were selected from among 398 clones. Two clones were IgG1 and eight were IgM. By immunostaining (ABC assay), a new antibody (named SH-9) reacted with normal pulmonary bronchus and uterine cervical glands. No positivity, however, was observed in endometriosis (adenomyosis). In tumorous lesions of ovary, SH-9 antibody reacted specifically with mucinous cystadenoma-benign, borderline or malignant. However, no positivity was found in serous cystadenocarcinoma. In any other carcinomas, only lung cancer (adenocarcinoma, squamous cell carcinoma) showed a clear positivity. Immuno blotting analysis showed that SH-9 antibody recognized a low molecular mass. Therefore, SH-9 is seen to be an extremely unique antibody when compared with OC125 biochemically and histochemically.
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PMID:[A new monoclonal antibody (SH-9) recognizes the low molecular mass of ovarian cancer antigen CA125]. 169 12

Elevation of the carcinoembryonal antigen concentration in patients with pulmonary carcinoma is directly dependent on the tumor process dissemination. Measurements of mucinous cancer-associated antigen, neurospecific enolase, CA-125 improve the reliability of enzyme immunoassays of tumor markers of lung cancer. Measurements of carcinoembryonic antigen over the course of treatment may become a valuable test permitting an objective assessment of the treatment efficacy.
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PMID:[Determination of carcinoembryonic antigen in lung cancer using an immunoenzyme assay]. 171 51

A review is made of the epidemiological studies of occupational cancer risks among tannery, leather and shoe industry workers. The risk of nasal cancer associated with exposure to leather dust, which had already been stressed at the beginning of the 1970's, was confirmed in recent studies. However, a decreasing trend of RR was observed among shoe industry workers. The excess of leukemia among shoe workers, which was mainly based on the description of numerous cases of acute myeloblastic leukemia, has also been confirmed by two cohort studies carried out in Italy and the U.K. In addition to the evident increase in these two diseases, there are indications of an excess of cancer of other sites among leather and shoe workers, particularly bladder cancer, both among workers assigned to leather finishing operations and in leather goods and shoe production workers. Another interesting result is the excess of lung cancer among tannery workers. This evidence is unanimous in the studies carried out in Italy but is not supported by the majority of studies performed in other countries. For this reason, we consider it extremely important to carry out a multicentric study in Italy, with particular attention to the definition of occupational exposures to carcinogens. There are also other isolated reports of excesses of other cancers in the shoe and leather industries but in our opinion they are of dubious interpretation.
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PMID:[Epidemiologic studies on carcinogenic risk and occupational activities in tanning, leather and shoe industries]. 227 95

Among 1,922 deaths in the American merchant marine population who were patients in the United States Public Health Service Hospital system in 1973-78, 46% were cancer associated. Eighteen percent of all deaths were due to heart disease. This pattern represented a reversal of the pattern found among patients of acute general care hospitals nationwide for the year 1975. Respiratory cancer amounted to 19.3% of the total, more than twice the number of such deaths among non-seamen patients. These patterns were consistent across a six-year time period. The finding in this study of an excess of cancer-associated deaths, particularly respiratory cancer, could be indicative of an occupationally associated risk. Data on the total population of merchant seamen at risk and of seamen deaths which may have occurred outside of the United States Public Health Service Hospital system are required to test more definitely the hypothesis of an occupational risk of cancer--especially lung cancer--among American merchant seamen.
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PMID:Mortality patterns of American merchant seamen 1973-1978. 232 12

We previously demonstrated that an acidic variant (B1) of lysosomal arylsulfatase B from transplanted human lung cancer is phosphorylated on its protein and carbohydrate moieties (Gasa, S., and Makita, A. (1983) J. Biol. Chem. 258, 5034-5039). The present study identifies that a cAMP-dependent protein kinase is responsible for phosphorylation of arylsulfatase B. The protein kinase activity toward the sulfatase was considerably higher in the transplanted lung cancer than in normal lung in the presence of cAMP. B enzyme purified from normal human liver was found to contain 0.6 mol/mol B enzyme, and protein kinase treatment added further 1.3 mol of Pi to give a single phosphopeptide (X). On the other hand, B1 enzyme purified from the transplanted human lung cancer which had been labeled in vivo with 32Pi revealed at least two phosphopeptides (X and Y). Assuming that the sulfatase from normal liver and lung cancer possesses the same number of available phosphorylation sites, phosphorylation of site X which was available only by deliberate phosphorylation of the native, ordinary B enzyme appears to be cancer-associated. Increasing phosphorylation of the sulfatase resulted in a maximum 50% elevation in arylsulfatase activity, followed by a decrease of the activity upon overphosphorylation, using an artificial substrate.
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PMID:Phosphorylation of human lysosomal arylsulfatase B by cAMP-dependent protein kinase. Different sites of phosphorylation between normal and cancer tissues. 243 76

The very rapidly expanding knowledge and technologies of molecular biology are reviewed with special reference to problems in the clinical management of lung cancer. Genetic events, tumor-associated antigens, production of murine and human monoclonal antibodies, culture of cell lines, intratumoral phenotypic diversity and squamous-lung-cancer-associated antigens are discussed and related to possible therapeutical approaches. A monoclonal antibody with high specificity for squamous cell lung cancer reacted positively in blood samples and tissue extracts in about 80%. Its use as a marker during follow-up after surgical treatment is demonstrated by examples. It is concluded that there will be limiting factors in the therapeutic use of monoclonal antibodies, such as intratumoral phenotypic diversity. Genetic analysis might be a method for selecting a high risk group of individuals in whom exposure to carcinogenic factors, such as cigarette smoking, would be fatal. Murine monoclonal antibodies can be used in vitro for screening, for histological examination and for prognostic studies. Human monoclonal antibodies should be used for in vivo purposes as well as for the screening of primary tumor and metastases for the therapy. To achieve usable results, the monoclonal antibodies should be raised against the cell membranes that, in particular, are expressed on the stem cells of the neoplastic cell population.
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PMID:On the advent and necessity of molecular biology in the clinical management of lung cancer. 243 92

The techniques of molecular biology now make it possible to clone specific genes, determine the nature of their molecular message, produce their protein product, and study their function in health and disease. DNA probes, particularly those for ribosomal RNA, offer a new way for the diagnosis of infectious diseases affecting the lung, particularly TB. In addition, recombinant DNA libraries of mycobacteria can be used to isolate mycobacterial antigens recognized by patients with TB. This may allow development of better immunologic tests and vaccines. A specific chromosomal abnormality of human chromosome 3 has been found in small cell lung cancer. It is hypothesized that loss of genes from this region may play a role in the pathogenesis of lung cancer. Another important factor in development of the disease is the expression of cancer-associated oncogenes. In addition to insights into the biology of lung cancer, these oncogenes might provide a method to classify various types of lung cancer and predict response to therapy. Specialized DNA markers known as RFLPs have now been linked with CF. This has resulted in localization of the CF gene to human chromosome 7 and the detection of the gene in most of its carriers who have been studied. Knowing where the gene resides and use of techniques of genetic engineering will eventually allow isolation of the CF gene (or genes) on chromosome 11 and determination of the biochemical defect for which it codes. Similarly, the gene for human alpha 1-antitrypsin has also been cloned. A practical benefit is the production of normal and mutant enzyme for replacement therapy in patients.
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PMID:Application of molecular biology to pulmonary disease. 265 Sep 62


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