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Ngo U, Shi Y, Woodruff P, Shokat K, DeGrado W, Jo H, Sheppard D, Sundaram AB. IL-13 and IL-17A Activate β1 Integrin through an NF-kB/Rho kinase/PIP5K1γ pathway to Enhance Force Transmission in Airway Smooth Muscle. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.01.592042. [PMID: 38746410 PMCID: PMC11092608 DOI: 10.1101/2024.05.01.592042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Integrin activation resulting in enhanced adhesion to the extracellular matrix plays a key role in fundamental cellular processes. Although G-protein coupled receptor-mediated integrin activation has been extensively studied in non-adherent migratory cells such as leukocytes and platelets, much less is known about the regulation and functional impact of integrin activation in adherent stationary cells such as airway smooth muscle. Here we show that two different asthmagenic cytokines, IL-13 and IL-17A, activate type I and IL-17 cytokine receptor families respectively, to enhance adhesion of muscle to the matrix. These cytokines also induce activation of β1 integrins as detected by the conformation-specific antibody HUTS-4. Moreover, HUTS-4 binding is significantly increased in the smooth muscle of patients with asthma compared to healthy controls, suggesting a disease-relevant role for aberrant integrin activation. Indeed, we find integrin activation induced by a β1 activating antibody, the divalent cation manganese, or the synthetic peptide β1-CHAMP, dramatically enhances force transmission in collagen gels, mouse tracheal rings, and human bronchial rings even in the absence of cytokines. We further demonstrate that cytokine-induced activation of β1 integrins is regulated by a common pathway of NF-κB-mediated induction of RhoA and its effector Rho kinase, which in turn stimulates PIP5K1γ-mediated synthesis of PIP2 resulting in β1 integrin activation. Taken together, these data identify a previously unknown pathway by which type I and IL-17 cytokine receptor family stimulation induces functionally relevant β1 integrin activation in adherent smooth muscle and help explain the exaggerated force transmission that characterizes chronic airways diseases such as asthma.
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Affiliation(s)
- Uyen Ngo
- Division of Pulmonary, Critical Care, Allergy and Sleep, Department of Medicine, University of California, San Francisco, California, USA
- Sandler Asthma Basic Research Center, University of California, San Francisco, California, USA
| | - Ying Shi
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, California, USA
| | - Prescott Woodruff
- Division of Pulmonary, Critical Care, Allergy and Sleep, Department of Medicine, University of California, San Francisco, California, USA
- Sandler Asthma Basic Research Center, University of California, San Francisco, California, USA
| | - Kevan Shokat
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, California, USA
- Howard Hughes Medical Institute, University of California, San Francisco, California, USA
| | - William DeGrado
- Cardiovascular Research Institute, University of California, San Francisco, California, USA
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California, USA
| | - Hyunil Jo
- Cardiovascular Research Institute, University of California, San Francisco, California, USA
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California, USA
| | - Dean Sheppard
- Division of Pulmonary, Critical Care, Allergy and Sleep, Department of Medicine, University of California, San Francisco, California, USA
- Cardiovascular Research Institute, University of California, San Francisco, California, USA
| | - Aparna B. Sundaram
- Division of Pulmonary, Critical Care, Allergy and Sleep, Department of Medicine, University of California, San Francisco, California, USA
- Sandler Asthma Basic Research Center, University of California, San Francisco, California, USA
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Ren Y, Liu J, Xu H, Wang S, Li S, Xiang M, Chen S. Knockout of integrin β1 in induced pluripotent stem cells accelerates skin-wound healing by promoting cell migration in extracellular matrix. Stem Cell Res Ther 2022; 13:389. [PMID: 35908001 PMCID: PMC9338467 DOI: 10.1186/s13287-022-03085-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 12/27/2021] [Indexed: 11/10/2022] Open
Abstract
Background Induced pluripotent stem cells (iPSCs) have the potential to promote wound healing; however, their adhesion to the extracellular matrix (ECM) might decrease iPSC migration, thereby limiting their therapeutic potential. Integrin β1 (Itgb1) is the major integrin subunit that mediates iPSC-ECM adhesion, suggesting that knocking out Itgb1 might be an effective method for enhancing the therapeutic efficacy of iPSCs. Methods We knocked out Itgb1 in mouse iPSCs and evaluated its effects on the therapeutic potential of topically applied iPSCs, as well as their underlying in vivo and in vitro mechanisms. Results The Itgb1-knockout (Itgb1-KO) did not change iPSC pluripotency, function, or survival in the absence of embedding in an ECM gel but did accelerate wound healing, angiogenesis, blood perfusion, and survival in skin-wound lesions. However, embedding in an ECM gel inhibited the in vivo effects of wild-type iPSCs but not those of Itgb1-knockout iPSCs. Additionally, in vitro results showed that Itgb1-knockout decreased iPSC-ECM adhesion while increasing ECM-crossing migration. Moreover, ECM coating on the culture surface did not change cell survival, regardless of Itgb1 status; however, the in vivo and in vitro functions of both Itgb1-knockout and wild-type iPSCs were not affected by the presence of agarose gel, which does not contain integrin-binding sites. Knockout of Integrin α4 (Itga4) did not change the above-mentioned cellular and therapeutic functions of iPSCs. Conclusions Itgb1-knockout increased iPSCs migration and the wound-healing-promoting effect of topically applied iPSCs. These findings suggest the inhibition of Itgb1 expression is a possible strategy for increasing the efficacy of iPSC therapies. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-03085-7.
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Affiliation(s)
- Yansong Ren
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Jinbo Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Huijun Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Shun Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Shirui Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Meng Xiang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Sifeng Chen
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China.
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