Functional Consequences of Cathepsin L Deficiency in Human Lung Epithelial Cells
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A. Wille
Abstract
Cathepsin L is a cysteine protease of the papain family. Lung epithelial cells play an important role in host defence. The aim of the present study was to investigate the functional role of cathepsin L in the human lung carcinoma cell line A549. Cathepsin Ldeficient A549 clones were generated. They showed a significant lower proliferation and secreted 5- to 8-fold more IL-8 than the control cells. The production of IL 6, IL-18, and TGFβ1/2 was not affected significantly. It was shown that the cells upregulate IL-8 transcription and that IL-8 in the culture supernatant is necessary for the containment of cellular proliferation. In conclusion, the data show that suppression of cathepsin L expression in A549 cells leads to a growth inhibition which is partially compensated by an upregulation of IL-8 production.
Copyright © 2002 by Walter de Gruyter GmbH & Co. KG
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- Phage Display Substrate: A Blind Method for Determining Protease Specificity
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Articles in the same Issue
- The International Proteolysis Society (IPS): A Society for Proteolysis, Proteases and Protease Inhibitors
- Proteases and Their Inhibitors: Traditional Research Subjects in the Munich Area
- Apoptotic Pathways: Involvement of Lysosomal Proteases
- Human Tissue Kallikreins: A New Enzymatic Cascade Pathway?
- Discovery of Chemokine Substrates for Matrix Metalloproteinases by Exosite Scanning: A New Tool for Degradomics
- Novel Secretory Vesicle Serpins, Endopin 1 and Endopin 2: Endogenous Protease Inhibitors with Distinct Target Protease Specificities
- Extracellular Proteases of Staphylococcus spp.
- Secreted Aspartic Proteases as Virulence Factors of Candida Species
- Triple-Helical Peptide Analysis of Collagenolytic Protease Activity
- Phage Display Substrate: A Blind Method for Determining Protease Specificity
- Evolution of Placental Proteases
- Factor VII Activating Protease (FSAP): A Novel Protease in Hemostasis
- Cold-Adapted and Mesophilic Brachyurins
- The Role of Dipeptidyl Peptidase IV (DP IV) Enzymatic Activity in T Cell Activation and Autoimmunity
- Biochemical Features, Molecular Biology and Clinical Relevance of the Human 15-Domain Serine Proteinase Inhibitor LEKTI
- Interaction of Plasminogen Activator Inhibitor Type-1 (PAI-1) with Vitronectin (Vn): Mapping the Binding Sites on PAI-1 and Vn
- Structure-Function Relationship of Bromelain Isoinhibitors from Pineapple Stem
- Structural Basis for the Processive Protein Degradation by Tricorn Protease
- Zinc Ligands in an Astacin Family Metalloprotease Meprin A
- Probing the Active Sites and Mechanisms of Rat Metalloproteases Meprin A and B
- (R)-3-Amidinophenylalanine-Derived Inhibitors of Factor Xa with a Novel Active-Site Binding Mode
- Inhibition of Arginine Gingipains (RgpB and HRgpA) with Benzamidine Inhibitors: Zinc Increases Inhibitory Potency
- Cathepsin B Stability, But Not Activity, Is Affected in Cysteine:Cystine Redox Buffers
- Inhibition of Mammalian Legumain by Michael Acceptors and AzaAsn-Halomethylketones
- Role of the Prosegment of Fasciola hepatica Cathepsin L1 in Folding of the Catalytic Domain
- Roles for Arg- and Lys-Gingipains in the Disruption of Cytokine Responses and Loss of Viability of Human Endothelial Cells by Porphyromonas gingivalis Infection
- Aberrant Expression of Serpin Squamous Cell Carcinoma Antigen 2 in Human Tumor Tissues and Cell Lines: Evidence of Protection from Tumor Necrosis Factor-Mediated Apoptosis
- Endosomal-Lysosomal Proteolysis Mediates Death Signalling by TNFα, Not by Etoposide, in L929 Fibrosarcoma Cells: Evidence for an Active Role of Cathepsin D
- Anti-Inflammatory Effect of Pre-Elafin in Lipopolysaccharide-Induced Acute Lung Inflammation
- The 26S Proteasome Rpn10 Gene Encoding Splicing Isoforms: Evolutional Conservation of the Genomic Organization in Vertebrates
- Reverse Genetic Analysis of the Caenorhabditis elegans 26S Proteasome Subunits by RNA Interference
- Purification and Characterization of the 20S Proteasome from Ostrich Skeletal Muscle
- Identification of a Signal Transduction Pathway That Regulates MMP-9 mRNA Expression in Glomerular Injury
- Modulation of the Endosomal and Lysosomal Distribution of Cathepsins B, L and S in Human Monocytes/Macrophages
- Characterization of Novel Anti-Cathepsin W Antibodies and Cellular Distribution of Cathepsin W in the Gastrointestinal Tract
- Functional Consequences of Cathepsin L Deficiency in Human Lung Epithelial Cells
- Determination of Cathepsin B Expression May Offer Additional Prognostic Information for Ovarian Cancer Patients
- CA-074, But Not Its Methyl Ester CA-074Me, Is a Selective Inhibitor of Cathepsin B within Living Cells
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