Nonintegrin laminin receptor precursor protein is expressed on olfactory stem and progenitor cells.
The biochemical identification and immunocytochemical characterization of a cell surface antigen, expressed on globose basal cells (GBCs) of the rodent olfactory epithelium (OE), are described. The monoclonal antibody (MAb) GBC-3 recognizes a surface protein, confirmed by both live cell staining and fluorescence-activated cell sorting. Two-dimensional SDS-PAGE/Western blot followed by tandem mass spectrometry demonstrates that the cell surface GBC-3 antigen is the 40 kDa laminin receptor precursor protein. The MAb GBC-3 labels the vast majority of cells among the GBC population and does not stain either sustentacular cells or horizontal basal cells (HBCs) in the normal rat OE. After epithelial lesion by exposure to methyl bromide, the remaining cells, which are mostly GBCs, are heavily stained by GBC-3, and colabeled with GBC-3 and sustentacular cell or HBC markers. GBC-3 will be a potentially useful tool for identifying and characterizing GBCs.
Jang
Woochan
W
Department of Anatomy and Cellular Biology, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.
Kim
Kwang Pyo
KP
Schwob
James E
JE
D000818:Animals; D002478:Cells, Cultured; D003952:Diagnostic Imaging; D004622:Embryo, Mammalian; D004848:Epithelium / Q000378:metabolism; D005434:Flow Cytometry / Q000379:methods; D018507:Gene Expression Regulation, Developmental / Q000502:physiology*; D013058:Mass Spectrometry; D009419:Nerve Tissue Proteins / Q000378:metabolism; D009830:Olfactory Bulb / Q000166:cytology* / Q000196:embryology; D011498:Protein Precursors / Q000235:genetics / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D017474:Receptors, Laminin; D013234:Stem Cells / Q000378:metabolism*
D009419:Nerve Tissue Proteins; D011498:Protein Precursors; D017474:Receptors, Laminin