Different Molecular Forms of TFF3 in the Human Respiratory Tract: Heterodimerization with IgG Fc Binding Protein (FCGBP) and Proteolytic Cleavage in Bronchial Secretions
Abstract
:1. Introduction
2. Results
2.1. Characterization of TFF3 Forms in Human Bronchial Tissue Specimens
2.2. Characterization of Multiple TFF3 Forms in Human Bronchial Secretions
2.3. Characterization of Multiple TFF3 Forms in Human BAL Fluid
2.4. Interactions of TFF3-FCGBP with DMBT1gp340
3. Discussion
3.1. TFF3 from the Human Respiratory Tract Forms High-Molecular-Mass Heterodimers with FCGBP
3.2. TFF3-FCGBP Forms Oligomers and Does Not Bind to DMBT1gp340
3.3. Respiratory Tract Secretory Specimens Contain 60k and 30k TFF3 Heterodimers
3.4. Degradation of TFF3 in Bronchial Secretions
4. Materials and Methods
4.1. Human Specimens
4.2. Protein Purification by SEC and Anion-Exchange Chromatography
4.3. SDS-PAGE, Agarose Gel Electrophoresis, and Western Blot Analysis
4.4. Identification of Proteins by Bottom-Up Proteomics
4.4.1. Tryptic In-Gel Digestion
4.4.2. LC-MS/MS Analysis of the Tryptic Peptides
4.4.3. LC-MS/MS Data Processing and Protein Identification
5. Conclusions and Medical Perspectives
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Acknowledgments
Conflicts of Interest
Abbreviations
AgGE | Agarose gel electrophoresis |
BAL | Bronchoalveolar lavage |
BS | Bronchial secretion |
COPD | Chronic obstructive pulmonary disease |
FCGBP | IgG Fc binding protein |
PAS | Periodic acid Schiff |
ROS | Reactive oxygen species |
TFF | Trefoil factor family |
vWF | von Willebrand factor |
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Weste, J.; Houben, T.; Harder, S.; Schlüter, H.; Lücke, E.; Schreiber, J.; Hoffmann, W. Different Molecular Forms of TFF3 in the Human Respiratory Tract: Heterodimerization with IgG Fc Binding Protein (FCGBP) and Proteolytic Cleavage in Bronchial Secretions. Int. J. Mol. Sci. 2022, 23, 15359. https://doi.org/10.3390/ijms232315359
Weste J, Houben T, Harder S, Schlüter H, Lücke E, Schreiber J, Hoffmann W. Different Molecular Forms of TFF3 in the Human Respiratory Tract: Heterodimerization with IgG Fc Binding Protein (FCGBP) and Proteolytic Cleavage in Bronchial Secretions. International Journal of Molecular Sciences. 2022; 23(23):15359. https://doi.org/10.3390/ijms232315359
Chicago/Turabian StyleWeste, Jens, Till Houben, Sönke Harder, Hartmut Schlüter, Eva Lücke, Jens Schreiber, and Werner Hoffmann. 2022. "Different Molecular Forms of TFF3 in the Human Respiratory Tract: Heterodimerization with IgG Fc Binding Protein (FCGBP) and Proteolytic Cleavage in Bronchial Secretions" International Journal of Molecular Sciences 23, no. 23: 15359. https://doi.org/10.3390/ijms232315359