title: Immunolocalization of CC10 in Clara cells in mouse and human lung.
abstract: Two antisera, denoted R41 and R42, were raised against a synthetic peptide from the murine Clara cell-specific protein CC10, and one antiserum, denoted R40, was raised against human recombinant uteroglobin, the human homolog of murine CC10. Purified antigen-specific antisera, denoted R40AP, R41AP, and R42AP were prepared using peptide columns. The purified antisera were characterized by dot blots, immunohistochemistry, and immunoblots. Immunohistochemistry of mouse lung showed specific labeling of Clara cells in distal bronchioles by all three antisera. In human lung, the antiuteroglobin antiserum specifically labeled Clara cells, while the anti-mouse peptide antisera had weak crossreactivity and higher background staining. Electron microscopy revealed immunogold labeling of CC10 granules in Clara cells of mouse lung with all antisera. All antisera also labeled a 5-kDa protein on immunoblots of mouse lung homogenates. The surface epithelium of the alveolar air spaces around the distal bronchioles were CC10 positive suggesting a functional activity for CC10 in the lung parenchyma distal to Clara cells. R40AP immunohistochemical staining of sections of normal human lungs and lungs from patients with surfactant protein B deficiency, bronchopneumonia, and idiopathic alveolar proteinosis illustrate the utility of the anti-human CC10 antibody for diagnostic pathology.
authors.affiliation: Department of Pathology, St. Louis University Health Sciences Center, 1402 South Grand Avenue, St. Louis, MO 63104, USA. ryersejs@slu.edu
authors.forename: J S
authors.initials: JS
authors.lastname: Ryerse
authors.forename: J W
authors.initials: JW
authors.lastname: Hoffmann
authors.forename: S
authors.initials: S
authors.lastname: Mahmoud
authors.forename: B A
authors.initials: BA
authors.lastname: Nagel
authors.forename: D E
authors.initials: DE
authors.lastname: deMello
mesh_terms: D000818:Animals; D001980:Bronchi / Q000737:chemistry / Q000166:cytology / Q000648:ultrastructure; D001996:Bronchopneumonia / Q000473:pathology; D006801:Humans; D007106:Immune Sera; D015151:Immunoblotting / Q000379:methods; D007150:Immunohistochemistry; D008168:Lung / Q000737:chemistry* / Q000166:cytology* / Q000648:ultrastructure; D051379:Mice; D016253:Microscopy, Immunoelectron; D011506:Proteins / Q000032:analysis* / Q000737:chemistry / Q000648:ultrastructure; D011649:Pulmonary Alveolar Proteinosis / Q000473:pathology; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism / Q000648:ultrastructure; D014598:Uteroglobin / Q000032:analysis* / Q000737:chemistry / Q000648:ultrastructure
chemical_list: D007106:Immune Sera; D011506:Proteins; D011994:Recombinant Proteins; C556389:SCGB1A1 protein, human; C556390:Scgb1a1 protein, mouse; D014598:Uteroglobin