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Immunohistochemical localization of the immunodominant differentiation antigen lacto-N-fucopentaose III in normal adult and fetal tissues

SG Combs, RJ Marder, JD Minna, JL Mulshine, MR Polovina and ST Rosen

Monoclonal antibodies were produced by immunizing rats with human small cell lung carcinoma (SCLC) cell lines. Monoclonal antibodies 600D11 and 624A12 were found to be directed against the ceramide pentasaccharide that contains the lacto-N-fucopentaose III (LNFP III) sequence of sugars, an isomer of the Lewis A blood group antigen. LNFP III is an immunodominant antigen whose reactivity is maintained in formalin-fixed paraffin-embedded sections (PS). LNFP III has been recognized in a number of human tumors including: SCLC; adenocarcinomas of the breast, gastrointestinal tract, genitourinary tract, and lung; renal cell carcinoma; neuroblastoma; and myelogenous leukemia. We now report the normal adult and fetal tissue distribution of the LNFP III antigen by immunoperoxidase staining on PS utilizing 600D11 and 624A12. Binding was demonstrated in bronchial epithelium and bronchial glands; squamous epithelium of the esophagus; gastric crypts, duodenal enterocytes and Brunners glands; argentaffin cells; jejunal and colonic goblet cells; pancreatic acinar cells; salivary glands; endocervical and exocervical cells; skin epidermis; myelinated motor fibers; cells of the adrenal medulla and anterior pituitary gland; polymorphonuclear leukocytes (PMNs); tissue macrophages and renal proximal tubules and loops of Henle. Staining was localized to cell membranes and within the cytoplasm, with greatest intensity at the apical and basal portions of the cells. These staining patterns were noted in adult and neonatal tissues, and initial expression could be traced to approximately the second trimester of fetal development. Knowledge of the normal tissue distribution of this immunodominant antigenic determinant may offer insight into its structural and functional role in benign and malignant tissues.

Volume 32, Issue 9, pp. 982-988, 09/01/1984
Copyright © 1984 by The Histochemical Society


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