neuraminic acid/neoplasms

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Diagnosis of head and neck carcinomas by means of immunological tumour markers (Beta-2-microglobulin, immunoglobulin E, ferritin, N-acetyl-neuraminic acid, phosphohexose-isomerase).

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In a great number of patients with squamous cell cancer of the head and neck, tumour markers in the serum were determined before any therapy, in order to evaluate their possible usefulness as parameters for monitoring therapy as well as for early detection of cancer. Patients with primary tumours (n

[Concentration of neuraminic acid in the serum of tumor patients (author's transl)].

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The neuraminic acid level in the serum of 588 patients was determined. The patients suffered from bronchial carcinomas other malignant diseases (mastocarcinoma, carcinoma of the cervix and the body of the uterus, Hodgkin's lymphoma, non-Hodgkin's lymphoma), and benign pulmonary diseases

Graphic-aided study of metabolic modifications of plasma in cancer using proton magnetic resonance spectroscopy.

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Proton high-resolution MRS of human plasma allows the rapid detection, on the same spectrum, of many compounds originating from different metabolic pathways. In this paper, we illustrate the modifications of the plasma metabolic profiles recorded by proton NMR spectroscopy in different classes of

Glycoproteins and human cancer: II. Correlation between circulating level and disease status.

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Many cancer patients have elevated serum protein and sialic acid (N-acetyl neuraminic acid, NANA) levels. Serial determinations were performed, using serum treated with perchloric acid from 34 patients with widespread metastatic disease. Six of six patients who underwent debulking surgery had a drop

Modulation of lectin-triggered superoxide release from neutrophils of tumor patients with and without chemotherapy.

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Superoxide production by neutrophils is believed to contribute to the efficiency of the host defence system. This activity is stimulated by the mannose-specific lectin concanavalin A, the N-acetylglucosamine/neuraminic acid-specific wheat germ agglutinin and the galactoside-specific lectins from

Ganglioside biosynthesis in developing brains and apoptotic cancer cells: X. regulation of glyco-genes involved in GD3 and Sialyl-Lex/a syntheses.

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Gangliosides, the acidic glycosphingolipids (GSLs) containing N-acetylgalactosamine and sialic acid are ubiquitous in the central nervous system. At least six DSL-glycosyltransferase activities (GLTs Gangliosides, the acidic glycosphingolipids (GSLs) containing N-acetylgalactosamine and sialic acid

Neuraminidase and tumor immunotherapy.

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Preliminary results of first clinical studies with the enzyme neuraminidase call attention to a new kind of cancer treatment. This promising approach to tumor immunotherapy was entered into the clinical phase as a consequence of successful experimental studies in tumor-bearing mice, rats and dogs.

Ganglioside as a Therapy Target in Various Types of Cancer.

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Since their discovery in 1940, it has been well established that gangliosides are associated with a number of biological pathways and cellular processes such as growth, differentiation and toxin uptake. Gangliosides are glycosphingolipids containing neuraminic acid which are expressed on the plasma

A shift from N-glycolyl- to N-acetyl-sialic acid in the GM3 ganglioside impairs tumor development in mouse lymphocytic leukemia cells.

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Humans, in contrast to other mammals, do not synthesize N-glycolyl-neuraminic acid (Neu5Gc) due to a deletion in the gene (cmah) encoding the enzyme responsible for this conversion, the cytidine monophospho-N-acetyl-neuraminic acid hydroxylase (CMP-Neu5Ac hydroxylase). The detection of considerable

Antitumor effects of the GM3(Neu5Gc) ganglioside-specific humanized antibody 14F7hT against Cmah-transfected cancer cells.

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The GM3(Neu5Gc) ganglioside represents a tumor-specific antigen that is considered a promising target for cancer immunotherapy. We previously demonstrated that the humanized antibody 14F7hT, specific for this ganglioside, exhibited significant antitumor effects in preclinical hematological tumor

Sweet escape: sialic acids in tumor immune evasion.

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Sialic acids represent a family of sugar molecules derived from neuraminic acid that frequently terminate glycan chains and contribute to many biological processes. Already five decades ago, aberrantly high expression of sialic acids has been proposed to protect cancer cells from recognition and

Glycophenotype of breast and prostate cancer stem cells treated with thieno[2,3-b]pyridine anticancer compound.

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Tumor progression may be driven by a small subpopulation of cancer stem cells (CSCs characterized by CD44+/CD24- phenotype). We investigated the influence of a newly developed thienopyridine anticancer compound (3-amino-5-oxo-N-naphthyl-5,6,7, 8-tetrahydrothieno[2,3-b]quinoline-2-carboxamide, 1) on

Ganglioside vaccines with emphasis on GM2.

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Gangliosides are neuraminic acid-containing glycosphingolipids that are anchored into the cell membrane lipid bilayer by lipophilic ceramide chains. They are overexpressed on tissues of neuroectodermal origin, and particularly in tumors such as melanomas, sarcomas, neuroblastomas, astrocytomas, and

Inhibition by N-acetyl neuraminic (sialic) acid of platelet aggregation induced by different stimuli.

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Addition of N-acetyl neuraminic acid (sialic acid, NANA) to citrated rat platelet-rich plasma significantly inhibited aggregation induced by near-threshold concentration of ADP, collagen or thrombin. In heparinized rat platelet-rich plasma aggregation of platelets induced by endotoxin or tumour

Phosphorylation-mediated changes in the electrophoretic mobility of CD5 molecules.

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This work shows that tumor promoter agents (TPA) induce the post-translational modification of the human lymphocyte surface CD5 antigen (Tp67) in several cellular types. Treatment of [32P]orthophosphate- and [35S]cysteine-labeled normal and lymphoblastoid T and B cells with active tumor promoters

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