title: BPIFB1 (LPLUNC1) is upregulated in cystic fibrosis lung disease.
abstract: Although the biology the PLUNC (recently renamed BPI fold, BPIF) family of secreted proteins is poorly understood, multiple array based studies have suggested that some are differentially expressed in lung diseases. We have examined the expression of BPIFB1 (LPLUNC1), the prototypic two-domain containing family member, in lungs from CF patients and in mouse models of CF lung disease. BPIFB1 was localized in CF lung samples along with BPIFA1, MUC5AC, CD68 and NE and directly compared to histologically normal lung tissues and that of bacterial pneumonia. We generated novel antibodies to mouse BPIF proteins to conduct similar studies on ENaC transgenic (ENaC-Tg) mice, a model for CF-like lung disease. Small airways in CF demonstrated marked epithelial staining of BPIFB1 in goblet cells but staining was absent from alveolar regions. BPIFA1 and BPIFB1 were not co-localised in the diseased lungs. In ENaC-Tg mice there was strong staining of both proteins in the airways and luminal contents. This was most marked for BPIFB1 and was noted within 2 weeks of birth. The two proteins were present in distinct cells within epithelium. BPIFB1 was readily detected in BAL from ENaC-Tg mice but was absent from wild-type mice. Alterations in the expression of BPIF proteins is associated with CF lung disease in humans and mice. It is unclear if this elevation of protein production, which results from phenotypic alteration of the cells within the diseased epithelium, plays a role in the pathogenesis of the disease.
authors: Academic Unit of Oral and Maxillofacial Pathology, School of Clinical Dentistry, University of Sheffield, Sheffield, UK.
authors: Lynne
authors: L
authors: Bingle
authors: Kirsty
authors: K
authors: Wilson
authors: Maslinda
authors: M
authors: Musa
authors: Bianca
authors: B
authors: Araujo
authors: Doris
authors: D
authors: Rassl
authors: William A
authors: WA
authors: Wallace
authors: Elizabeth E
authors: EE
authors: LeClair
authors: Thais
authors: T
authors: Mauad
authors: Zhe
authors: Z
authors: Zhou
authors: Marcus A
authors: MA
authors: Mall
authors: Colin D
authors: CD
authors: Bingle
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000032:analysis; D015214:Antigens, Differentiation, Myelomonocytic / Q000032:analysis; D001324:Autoantigens; D001992:Bronchoalveolar Lavage Fluid / Q000737:chemistry; D002352:Carrier Proteins / Q000096:biosynthesis / Q000235:genetics; D003550:Cystic Fibrosis / Q000378:metabolism* / Q000473:pathology; D004195:Disease Models, Animal; D053503:Epithelial Sodium Channels / Q000235:genetics / Q000378:metabolism; D050556:Fatty Acid-Binding Proteins; D006023:Glycoproteins / Q000032:analysis; D020397:Goblet Cells / Q000378:metabolism / Q000473:pathology; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000378:metabolism; D008168:Lung / Q000737:chemistry / Q000378:metabolism / Q000473:pathology; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D055271:Mucin 5AC / Q000032:analysis; D009504:Neutrophils / Q000378:metabolism; D010750:Phosphoproteins / Q000032:analysis; D018410:Pneumonia, Bacterial / Q000378:metabolism / Q000473:pathology; D011506:Proteins / Q000032:analysis / Q000378:metabolism*; D015854:Up-Regulation; D000097382:CD68 Molecule
chemical_list: D015703:Antigens, CD; D015214:Antigens, Differentiation, Myelomonocytic; D001324:Autoantigens; D002352:Carrier Proteins; D053503:Epithelial Sodium Channels; D050556:Fatty Acid-Binding Proteins; D006023:Glycoproteins; D055271:Mucin 5AC; D010750:Phosphoproteins; D011506:Proteins; C485599:BPIFA1 protein, human; C568077:BPIFB1 protein, human; C579352:BPIFB1 protein, mouse; C067980:CD68 antigen, human; D000097382:CD68 Molecule; C524678:MUC5AC protein, human