vicia villosa/neoplasms

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Detection of Tn antigen with Vicia villosa agglutinin in urinary bladder cancer: its relevance to the patient's clinical course.

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Recently, several investigators have demonstrated that the MN blood group precursor antigens Thomsen-Friedenreich antigen (T-Ag) and Tn-antigen (Tn-Ag) are expressed on the cell surfaces of several cancers, including urinary bladder cancer. T-Ag is composed of a specific carbohydrate chain,

Expression of Vicia villosa agglutinin (VVA)-binding glycoprotein in primary breast cancer cells in relation to lymphatic metastasis: is atypical MUC1 bearing Tn antigen a receptor of VVA?

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Aberrant carbohydrate expression frequently occurs in breast cancer and may endow cells with metastatic potential. Here we first studied the relationship between expression of Vicia villosa agglutinin (lectin) (VVA)-binding carbohydrates and aggressive breast cancer. We then investigated the

Lectin microarray technology identifies specific lectins related to lymph node metastasis of advanced gastric cancer.

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BACKGROUND Although various molecular profiling technologies have the potential to predict specific tumor phenotypes, the comprehensive profiling of lectin-bound glycans in human cancer tissues has not yet been achieved. METHODS We examined 242 advanced gastric cancer (AGC) patients without or with

Cancer metastasis: characterization and identification of the behavior of metastatic tumor cells and the cell adhesion molecules, including carbohydrates.

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This review focuses on the behavior of metastatic tumor cells and their specific adhesion molecules. Much of this review is based on the results from our researches over many years. Electron microscopic investigations of metastatic processes have demonstrated that desmosomes, tight junctions, or

Different patterns of lectin binding and cell surface sialylation detected on related high- and low-metastatic tumor lines.

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We have analyzed cell surface-bound carbohydrates in two different model systems for metastasis composed of closely related tumor cell lines with differing metastatic potential. The first system studied was that of the DBA/2-derived T-lymphoma lines (Eb/ESb) and some recently established sublines of

Detection of the cancer-associated T antigen using an Arachis hypogaea agglutinin biosensor.

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An impedimetric biosensor was developed for the selective detection of the cancer-associated T antigen, using the lectin from Arachis hypogaea (peanut agglutinin, PNA) as the recognition element. The increase in the biosensor's impedance after sample incubation was indicative of lectin recognition

Tumor site-selective localization of an adoptively transferred T cell line expressing a macrophage lectin.

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CTLL-2 cells were transfected with an expression vector that contained cDNA of a mouse macrophage galactose/N-acetylgalactosamine-specific calcium-type lectin (MMGL) and a stable transfectant (CTL-ML) was established. These cells and mock transfectant cells (CTL-CEP) were labeled with a long-term

Effect of benzyl-alpha-GalNAc, an inhibitor of mucin glycosylation, on cancer-associated antigens in human colon cancer cells.

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Many cancer-associated antigens are present on mucin glycoproteins. These include peripheral antigens such as sialyl Lea and sialyl Lex and core region carbohydrate antigens such as T, Tn, and Sialyl Tn. We have recently described an inhibitor of mucin glycosylation, benzyl-alpha-GalNAc. The purpose

Development of an immuno-lectin-enzymatic assay for the detection of serum cancer-associated glycoproteins bearing Tn determinant.

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We report the development of an immuno-lectin-enzymatic assay (CA83.4) with the purpose of quantifying serum glycoproteins bearing Tn determinant (GalNAc alpha-O-Ser/Thr). An anti-Tn monoclonal antibody (83D4) is bound to the solid phase in order to capture glycoproteins. After the addition of a

Polyvalency of Tn (GalNAcalpha1-->Ser/Thr) glycotope as a critical factor for Vicia villosa B4 and glycoprotein interactions.

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Vicia villosa B(4) (VVL-B(4)) is an important lectin for detecting exposed Tn (GalNAcalpha1-Ser/Thr) determinants on cancer cells. In order to elucidate the binding factors involved in VVL-B(4) and glycotope interaction, the binding properties of this lectin were analyzed by enzyme-linked

Contrasuppression and tumor rejection.

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The growth of a highly progressive MCA-induced tumor 3152-PRO is dependent on the activity of suppressor T cells (Ts). Injection of syngeneic mice with antibodies specific for Ts leads to enhanced tumor transplantation resistance of the 3152-PRO tumor. In addition, injection of recipient mice with

Protective immunity to progressive tumors can be induced by antigen presented on regressor tumors.

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Immunization of animals with 1591-RE tumor cells, a highly immunogenic UV-induced epithelia cell tumor from C3H/HeN mice, that were haptenated with trinitrophenol (TNP) leads to protective immunity against a challenge of TNP-haptenated 3152-PRO tumor cells, a progressive highly malignant.

Expression of glycoconjugates in pancreatic, gastric, and colonic tissue by Bauhinia purpurea, Vicia villosa, and peanut lectins.

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We have earlier prepared a pancreatic cancer-associated mucin, whose altered carbohydrate structure was recognized by Vicia villosa (VVA), Bauhinia purpurea (BPA), and peanut (PNA) lectins and which was found preferentially in the sera of patients with pancreatic or gastric cancer. Cancer-associated

Enhancement in accessibility to macrophages by modification of mucin-type carbohydrate chains on a tumor cell line: role of a C-type lectin of macrophages.

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We investigated the role of mucin-type (O-linked) carbohydrate chains of tumor target cells in the recognition by macrophages through a Gal/GalNAc-specific calcium-dependent lectin. Binding of a soluble form of this lectin to P815 mastocytoma cells was increased by treatment with benzyl-GalNAc,

Histochemical study of lectin binding in neoplastic and non-neoplastic urothelium.

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A histochemical study of lectin binding was performed to assess staining with lectins and, therefore, the expression of complex carbohydrates in human neoplastic urothelium. Forty-seven patients with transitional cell carcinoma of the bladder and six controls were studied. Cryostat sections were

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