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Xie Z, Chen J, Wang C, Zhang J, Wu Y, Yan X. Current knowledge of Krüppel-like factor 5 and vascular remodeling: providing insights for therapeutic strategies. J Mol Cell Biol 2021; 13:79-90. [PMID: 33493334 PMCID: PMC8104942 DOI: 10.1093/jmcb/mjaa080] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/23/2020] [Accepted: 12/08/2020] [Indexed: 12/18/2022] Open
Abstract
Vascular remodeling is a pathological basis of various disorders. Therefore, it is necessary to understand the occurrence, prevention, and treatment of vascular remodeling. Krüppel-like factor 5 (KLF5) has been identified as a significant factor in cardiovascular diseases during the last two decades. This review provides a mechanism network of function and regulation of KLF5 in vascular remodeling based on newly published data and gives a summary of its potential therapeutic applications. KLF5 modulates numerous biological processes, which play essential parts in the development of vascular remodeling, such as cell proliferation, phenotype switch, extracellular matrix deposition, inflammation, and angiogenesis by altering downstream genes and signaling pathways. Considering its essential functions, KLF5 could be developed as a potent therapeutic target in vascular disorders.
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Affiliation(s)
- Ziyan Xie
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Junye Chen
- Department of Vascular Surgery, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Chenyu Wang
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Jiahao Zhang
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yanxiang Wu
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Xiaowei Yan
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
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Acute-on-chronic liver disease enhances phenylephrine-induced endothelial nitric oxide release in rat mesenteric resistance arteries through enhanced PKA, PI3K/AKT and cGMP signalling pathways. Sci Rep 2019; 9:6993. [PMID: 31061522 PMCID: PMC6502824 DOI: 10.1038/s41598-019-43513-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 04/15/2019] [Indexed: 12/15/2022] Open
Abstract
Acute-on-chronic liver disease is a clinical syndrome characterized by decompensated liver fibrosis, portal hypertension and splanchnic hyperdynamic circulation. We aimed to determine whether the alpha-1 agonist phenylephrine (Phe) facilitates endothelial nitric oxide (NO) release by mesenteric resistance arteries (MRA) in rats subjected to an experimental microsurgical obstructive liver cholestasis model (LC). Sham-operated (SO) and LC rats were maintained for eight postoperative weeks. Phe-induced vasoconstriction (in the presence/absence of the NO synthase –NOS- inhibitor L-NAME) and vasodilator response to NO donor DEA-NO were analysed. Phe-induced NO release was determined in the presence/absence of either H89 (protein kinase –PK- A inhibitor) or LY 294002 (PI3K inhibitor). PKA and PKG activities, alpha-1 adrenoceptor, endothelial NOS (eNOS), PI3K, AKT and soluble guanylate cyclase (sGC) subunit expressions, as well as eNOS and AKT phosphorylation, were determined. The results show that LC blunted Phe-induced vasoconstriction, and enhanced DEA-NO-induced vasodilation. L-NAME increased the Phe-induced contraction largely in LC animals. The Phe-induced NO release was greater in MRA from LC animals. Both H89 and LY 294002 reduced NO release in LC. Alpha-1 adrenoceptor, eNOS, PI3K and AKT expressions were unchanged, but sGC subunit expression, eNOS and AKT phosphorylation and the activities of PKA and PKG were higher in MRA from LC animals. In summary, these mechanisms may help maintaining splanchnic vasodilation and hypotension observed in decompensated LC.
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Wang K, Qin S, Liang Z, Zhang Y, Xu Y, Chen A, Guo X, Cheng H, Zhang X, Ke Y. Epithelial disruption of Gab1 perturbs surfactant homeostasis and predisposes mice to lung injuries. Am J Physiol Lung Cell Mol Physiol 2016; 311:L1149-L1159. [PMID: 27793798 DOI: 10.1152/ajplung.00107.2016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 10/19/2016] [Indexed: 12/21/2022] Open
Abstract
GRB2-associated-binding protein 1 (Gab1) belongs to Gab adaptor family, which integrates multiple signals in response to the epithelial growth factors. Recent genetic studies identified genetic variants of human Gab1 gene as potential risk factors of asthmatic inflammation. However, the functions of Gab1 in lungs remain largely unknown. Alveolar type-II cells (AT-IIs) are responsible for surfactant homeostasis and essentially regulate lung inflammation following various injuries (3). In this study, in vitro knockdown of Gab1 was shown to decrease the surfactant proteins (SPs) levels in AT-IIs. We further examined in vivo Gab1 functions through alveolar epithelium-specific Gab1 knockout mice (Gab1Δ/Δ). In vivo Gab1 deficiency leads to a decrease in SP synthesis and the appearance of disorganized lamellar bodies. Histological analysis of the lung sections in Gab1Δ/Δ mice shows no apparent pathological alterations or inflammation. However, Gab1Δ/Δ mice demonstrate inflammatory responses during the LPS-induced acute lung injury. Similarly, in mice challenged with bleomycin, fibrotic lesions were found to be aggravated in Gab1Δ/Δ These observations suggest that the abolishment of Gab1 in AT-IIs impairs SP homeostasis, predisposing mice to lung injuries. In addition, we observed that the production of surfactants in AT-IIs overexpressing Gab1 mutants, in which Shp2 phosphatase and PI3K kinase binding sites have been mutated (Gab1ΔShp2, Gab1ΔPI3K), has been considerably attenuated. Together, these findings provide the direct evidence about the roles of docking protein Gab1 in lungs, adding to our understanding of acute and interstitial lung diseases caused by the disruption of alveolar SP homeostasis.
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Affiliation(s)
- Kai Wang
- Department of Respiratory Medicine, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Shenlu Qin
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Zuyu Liang
- Department of Respiratory Medicine, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yun Zhang
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Yingchun Xu
- Department of Pulmonary Diseases, Children's Hospital, School of Medicine, Zhejiang University, Hangzhou, China; and
| | - An Chen
- Department of Neonatal, Children's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaohong Guo
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Hongqiang Cheng
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Xue Zhang
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuehai Ke
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China;
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