keratoacanthoma/carbohydrate

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Differences in sialyl-Tn antigen expression between keratoacanthomas and cutaneous squamous cell carcinomas.

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Keratoacanthoma and squamous cell carcinoma are common skin tumors, especially in immunosuppressed transplant recipients, but the distinction between these two types of epidermal neoplasia may be difficult. Sialyl-Tn (Sia-GalNAc-O-Ser/Thr) is a cell surface carbohydrate associated with hyperplasia

Utility of peanut agglutinin (PNA) in the diagnosis of squamous cell carcinoma and keratoacanthoma.

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Lectins are glycoproteins that bind to specific carbohydrate groups on cell surfaces. Peanut lectin (PNA) binds to carbohydrates on the membranes of normal keratinocytes. Recently, some authors have proposed that PNA may be a useful marker to help differentiate keratoacanthomas from

Cell surface carbohydrates in proliferative epidermal lesions. II. Masking of peanut agglutinin (PNA) binding sites in solar keratoses, Bowen's disease, and squamous cell carcinoma by neuraminic acid.

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Seventy-six skin biopsies of proliferative lesions were studied by using 4 different lectins and an avidin-biotin-peroxidase complex. In solar keratosis, Bowen's disease and squamous cell carcinoma, malignant-appearing keratinocytes exhibited loss of membrane staining with Concanavalia ensiformis

Is the carbohydrate sialosyl-Tn a marker for altered, non-malignant activity in squamous epithelium in the head and neck region?

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Cell surface carbohydrates are involved in many cell functions such as cellular differentiation, adhesion, and invasion. A carbohydrate, sialosyl-Tn (STn), is expressed in many human carcinomas but generally not in normal epithelia. In the oral mucosa, however, STn has recently been observed on

Cell-surface carbohydrates in proliferative epidermal lesions. Distribution of A, B, and H blood group antigens in benign and malignant lesions.

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The distribution of A, B, and H blood group antigens was studied by means of peroxidase-antiperoxidase technique in normal skin and in lesions of carcinomas in situ (solar keratoses, Bowen's disease), squamous cell carcinoma, keratoacanthomas, and verrucae. In normal skin, the epidermis of persons

Enzymes of carbohydrate metabolism in human epidermal tumors 4. Enzymes of the pentose phosphate pathway.

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The acitvities of six enzymes were determined by fluorometric micromethods in epidermal tumors (basal and squamous cell epithelioma, verruca seborrhecia and keratoacanthoma) and compared to the activities in the adjoining, apparently normal epidermis. Specific changes related to malignancy were not

Enzymes of carbohydrate metabolism in human epidermal tumors. 5.

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The activities of eight enzymes were determined by fluorometric micromethods in epidermal tumors (basal and squamous cell epithelioma, verruca seborroeica and keratoacanthoma) and compared to the activities in the adjoining, apparently normal epidermis. The activities were increased in basal cell

Glycophenotype evaluation in cutaneous tumors using lectins labeled with acridinium ester.

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BACKGROUND Tumor cells show alterations in their glycosylation patterns when compared to normal cells. Lectins can be used to evaluate these glycocode changes. Chemiluminescence assay is an effective technique for quantitative analysis of proteins, nucleic acids, and carbohydrates due to its high

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