Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0007097 (carcinoma)
 152,788 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Sera of 24 patients with nasopharyngeal carcinoma (NPC) and of 60 healthy donors were studied for presence of IgG and IgA antibodies against different antigens induced by Epstein--Barr virus (EBV). The results obtained demonstrate that NPC in Cuba, as in other countries, is accompanied by elevated antibody titers against EBV-specific IgG antibodies, whose levels strongly differ from those of healthy persons. Patients with NPC in Cuba had higher titers of antibody against VCA of EBV in comparison with patients of Caucasian origin in those countries where NPC, the same as in cuba, is rarely found. Cuban NPC patients had high levels of antibody against EA, often higher than in NPC patients in endemic zones of this disease.
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PMID:EBV-specific humoral antibodies in nasopharyngeal carcinoma patients in Cuba. 22 30

The Epstein-Barr virus (EBV) is closely associated with nasopharyngeal carcinoma, suggesting an etiologic relationship. We have under-taken studies (1) to quantitate the relationship between antibody titers to EBV-associated antigens and nasopharyngeal carcinoma in American patients since most of the patients in previous studies were of either Asian or African descent and (2) to determine the relationship between antibody titers and the clinical course of the disease. Sera from patients with primary or recurrent nasopharyngeal carcinoma and from patients in remission, from patients with various other head and neck tumors (including occult primary lesions and lymphomas), and from normal controls were titrated for IgG antibodies to viral capsid antigen (VCA) and early antigen and IgA antibodies to VCA, using indirect immunofluorescence procedures previously detailed. High titers of antibodies to EBV-induced early antigens and VCA in the IgG fraction and VCA in the IgA fraction were frequently found in the sera of patients with nasopharyngeal carcinoma. A significant reduction in these titers was observed with clinical remission of the disease in treated patients. Preliminary findings suggest that EBV serology may be useful in the evaluation and treatment of patients with nasopharyngeal carcinoma and also in patients with cervical metastases from clinically occult promary sites in order to identify those with occult nasopharyngeal carcinoma.
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PMID:Immunovirologic assessment of American patients with nasopharyngeal carcinoma and occult primary tumors. 22 61

A total of 363 cases of nasopharyngeal carcinoma (NPC) in Singapore were classified into squamous cell carcinoma (SCC; 73 cases), non-keratinizing carcinoma (NKC; 178 cases) and undifferentiated carcinoma (UC; 172 cases). Possible biological differences between these histologic types and between tumors with and without lymphocytic infiltration were investigated by correlations with survival rates and with selected epidemiologic, immunovirologic, and immunogenetic data on the disease. The 5-year survival rates following radiotherapy were 25.3% for all cases and 58.8% for tumors restricted to the nasopharynx. The 5-year survival rate for SCC was poorer than for the combined NKC and UC groups (p less than 0.05). The 3-year survival rate was better for tumors with lymphocytic infiltration (p less than 0.05), but there were no differences in the 5-year survivals. The survival rates were better in females (p less than 0.01) and in the younger age groups (p less than 0.01). There were no significant correlations between histopathology of NPC and the distributions of cases by age, sex, HLA antigen profiles, or cell-mediated immune status. Squamous cell carcinoma was associated with lower levels of antibodies to the Epstein-Barr nuclear antigen (p less than 0.05), but there were no differences with respect to antibodies against other EBV related antigens. These findings support the view that SCC, NKC, and UC of the nasopharynx, as defined in the WHO classification, are variants of a fairly homogeneous group of neoplasms in the Singapore population.
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PMID:Histopathology of nasopharyngeal carcinoma: correlations with epidemiology, survival rates and other biological characteristics. 22 2

Sera from 24 patients with nasopharyngeal carcinoma (NPC) and from 60 normal subjects were examined for the presence of IgG and IgA antibody to various antigens associated with Epstein-Barr virus (EBV). The results indicate that NPC in Cuba, like in other countries, was accompanied by high titers of EBV-specific IgG antibody the levels of which differed markedly from those in normal subjects. Serological activity of the patients differed depending on the stage of the illness and its duration. Geometric mean antibody titers to the capsid antigen (VCA), D and R components of early antigen (EA) of EBV complex were higher in patients with extensive tumour process (III--IV stages) and in patients with the duration of the disease since the onset less than 3 years. Sera of the most patients contained EBV-specific IgA antibody which were practically completely absent in sera of the control subjects. Alongside with characteristic manifestations of responsiveness to EBV observed by other workers, patients with NPC in Cuba had specific features: higher antibody titers to VCA than in Caucasian subjects in the countries where this disease occurred sporadically, like in Cuba; high levels of antibody to EA, frequently exceeding those in patients with NPC from endemic zones (for instance in Chinese patients); prevalence of EBV-specific antibody to the R component of EA complex.
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PMID:[IgG- and IgA-antibodies to the Epstein-Barr virus in the sera of patients with nasopharyngeal carcinoma in Cuba]. 22 87

In order to better understand the relationship between IgA and IgG antibodies to Epstein-Barr virus (EBV) in nasopharyngeal carcinoma (NPC), we analyzed 230 NPC sera but also a series of sera from patients with other carcinomas selected for their high EBV/IgG antibody titres. We were surprised to find that 21 out of 46 sera from bronchopulmonary carcinomas (BPC) and 6 out of 7 carcinomas of nasal fossae were IgA anti-VCA positive, and 9 BPC sera and 5 nasal fossae sera were also positive for IgA and anti-EA. Bronchial undifferentiated small-cell carcinomas may represent a particular group associated with high EBV profile.
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PMID:Epstein-Barr virus specific IgA serum antibodies in nasopharyngeal and other respiratory carcinomas. 23 Oct 14

Soluble antigen of P3HR-1 cells (SA-P3HR-1) was identified in indirect double immunodiffusion enhanced with tannic acid using serum of a nasopharyngeal carcinoma patient containing high-titer antibodies to Epstein-Barr virus (EBV) antigens. SA-P3HR-1 was nonidentical to soluble antigen of Raji cells. Human and baboon sera containing antibodies to all the known antigen of EBV and HVP respectively were anti-SA-3HR-1-positive. Human and baboon sera containing antibodies to all the known antigens of EBV and herpesvirus Papio (HVP) were also anti-SA-P3HR-1-negative. Prevalence of anti-SA-P3HR-1 was very high in two groups of the high-lymphoma incidence stock of hamadryas baboons of the Sukhumi monkey colony. 54% (15 of 28) and 38% (13 of 34) of clinically lymphomatous and clinical normal monkeys, respectively, were anti-SA-P3HR-1-positive.. Only 1 of 30 normal baboons studied, living in the forest and having no contacts with the baboons in the main stock of the Sukhumi monkey colony, was anti-SA-P3HR-1-positive (3%).
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PMID:Prevalence of antibodies to soluble antigen of Epstein-Barr virus-producing cells (P3HR-1) in the sera of hamadryas baboons of the high lymphoma incidence stock. 23 20

Sera collected from patients with nasopharyngeal carcinoma, patients with other head and neck neoplasms, patients with infectious mononucleosis (IM), and healthy donors were titrated for antibodies (IgM, IgG, IgA) against Epstein-Barr-Virus (EBV) specific antigens (VCA, EA, EBNA) by indirect and by antikomplementary immunfluorescence. NPC-patients develop significantly high anti-EBV titers of IgG and IgA. In contrast patients with neoplasms (mainly carcinomas) arising in sites of the head and neck other than the nasopharynx revealed a lower incidence of high titers. Our results emphasize the remarkable predominance of IgA-antibodies to VCA and EA in NPC-patients and shows that Europeans to not differ in that respect from Asian patients. The significance and implications of these findings are discussed.
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PMID:[Significance of virus-specific antibodies to EBV-antigens in patients with nasopharyngeal carcinoma (author's transl)]. 23 16

Thirteen cases of nasopharyngeal carcinoma (NPC) and 16 cases of non-NPC tumors in the nasopharynx or in adjacent locations were investigated clinically, immunologically, and pathologically. All tumors were classified according to the TNM classification, and the stage and course of the disease was correlated with the histological tumor type, the T- and B-cell distribution in tumor tissue and in the peripheral blood, as well as with antibody titers against Epstein-Barr virus (EBV). The results showed a positive correlation of decreased T- and B-cells in tumor tissue and of decreased T-cells in the peripheral blood with the extend of the tumor in both NPC and non-NPC cases, with some exceptions of lymphocyte rich neoplasms (lymphoepithelial carcinoma and malignant lymphoma). Antibodies against EBV (early antigen and capsid antigen) became progressively elevated with increasing tumor stage in NPC-cases but not in non-NPC cases. The latter, however, was observed only in two histological types of NPC's: anaplastic carcinoma and lymphoepithelial carcinoma; titers in the remaining tumor types stayed insignificant.
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PMID:Nasopharyngeal and adjacent neoplasms: a clinico-pathologic and immunologic study. 30 42

In attempts to heterotransplant human NPc into nude mice, using seven cultured cell lines, we have succeeded in growing a carcinoma simplex, composed of Epstein-Barr virus-determined nuclear antigen-positive and Epstein-Barr virus genome-positive cancer cells, at the injected site with two of the cell lines. These originated from a spindle-cell carcinoma (Chinese NPC-204) and from a combined-cell carcinoma (Chinese NPC-501), respectively. During the first few passages, wandering macrophages were prevalent and increased in number in response to the presence of the tumours. In conjunction with a gradual decrease in the number of wandering macrophages in the medullary sinuses, diffuse hyperplasia of lymphocytes occurred in regional lymph nodes. As a result of the release of lymphocytes and macrophages into the peripheral lymph nodes, the spleen underwent extensive change, as manifested by the collapse of the splenic cords and the formation of septa studded with granulomas. Under these conditions of immunosuppression, lymphatic metastases were observed during the periods between the 11th and 14th generations and the 24th and 30th generations with NPC-204 and between the 9th and 14th generations with NPC-501. The neighbouring lymph nodes, like the spleen, were often studded with epithelioid-cell granulomas, formed by the aggregation of macrophages around nuclear debris in the subcortical areas. We assume that the clumps of debris are the remnants of metastatic cancer cells which were probably killed by macrophages or by sensitized lymphocytes. If the lymph nodes contain a barrier of granulomas, they are not invaded by tumour cells from the cortical sinuses, except in the rare case of retrograde metastasis from the hilus. It would appear that macrophages can replace T lymphocytes, which are found in very small numbers in the nude mice used in this study, in killing tumour cells and, furthermore, in protecting the lymph nodes from the spread of metastases. Metastasis cannot occur in these nude mice when their lymphoreticular system, especially that of the spleen, is working in a stable balance.
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PMID:A histopathological study of lymphoid tissue reaction to metastatic nasopharyngeal carcinoma in nude mice. 31 Apr 17

Immunohistochemical investigations by the immunoperoxidase method have been carried out on sections of biopsy specimens obtained from the primary tumour sites of patients with nasopharyngeal carcinoma (NPC). It was found that, in many of the sections thus examined, there was an accumulation of plasma cells, particularly of the IgA type, in the connective tissues surrounding nests of NPC cells. Similar accumulation of plasma cells in the subepithelial connective tissues was likewise observed in a case of choanal polyp. Plasma cells were rarely observed in the section of a biopsy specimen of non-neoplastic oropharyngeal mucosa. These results indicated that the nasopharynx may be a site for the local production of IgA, but the antigenic specificity of these molecules is, however, not known. The possibility that the nasopharynx is a site for the local production of antibodies to the Epstein-Barr virus (EBV)-related antigens was discussed.
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PMID:Immunohistochemistry of local immunoglobulin production in nasopharyngeal carcinoma. 34 24


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