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Jin J, Pan B, Wang K, Yu S, Wu G, Fang H, Zhu B, Chen Y, Zhu L, Liu Y, Xia Z, Zhu S, Sun Y. Subvacuum environment-enhanced cell migration promotes wound healing without increasing hypertrophic scars caused by excessive cell proliferation. Cell Prolif 2023; 56:e13493. [PMID: 37128180 PMCID: PMC10623940 DOI: 10.1111/cpr.13493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/03/2023] Open
Abstract
Cell migration and proliferation are conducive to wound healing; however, regulating cell proliferation remains challenging, and excessive proliferation is an important cause of scar hyperplasia. Here, we aimed to explore how a subvacuum environment promotes wound epithelisation without affecting scar hyperplasia. Human immortalized keratinocyte cells and human skin fibroblasts were cultured under subvacuum conditions (1/10 atmospheric pressure), and changes in cell proliferation and migration, target protein content, calcium influx, and cytoskeleton and membrane fluidity were observed. Mechanical calcium (Ca2+ ) channel blockers were used to prevent Ca2+ influx for reverse validation. A rat wound model was used to elucidate the mechanism of the subvacuum dressing in promoting healing. The subvacuum environment was observed to promote cell migration without affecting cell proliferation; intracellular Ca2+ concentrations and PI3K, p-PI3K, AKT1, p-AKT 1 levels increased significantly. The cytoskeleton was depolymerized, pseudopodia were reduced or absent, and membrane fluidity increased. The use of Ca2+ channel blockers weakened or eliminated these changes. Animal experiments confirmed these phenomena and demonstrated that subvacuum dressings can effectively promote wound epithelisation. Our study demonstrates that the use of subvacuum dressings can enhance cell migration without affecting cell proliferation, promote wound healing, and decrease the probability of scar hyperplasia.
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Affiliation(s)
- Jian Jin
- Department of Polymer ScienceFudan UniversityShanghaiChina
| | - Bo‐han Pan
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
| | - Kang‐an Wang
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
| | - Shao‐Shuo Yu
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
| | - Guo‐sheng Wu
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
| | - He Fang
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
| | - Bang‐hui Zhu
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
| | - Yu Chen
- 903rd Hospital of PLAHangzhouChina
| | | | - Yan Liu
- Department of Burns and Plastic Surgery, Ruijing Hospital, School of MedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Zhao‐fan Xia
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
| | - Shi‐hui Zhu
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
| | - Yu Sun
- Department of Burn Surgery, Changhai HospitalThe Naval Medical UniversityShanghaiChina
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Chen HY, Lin LT, Wang ML, Lee SH, Tsai ML, Tsai CC, Liu WH, Chen TC, Yang YP, Lee YY, Chang YL, Huang PI, Chen YW, Lo WL, Chiou SH, Chen MT. Musashi-1 regulates AKT-derived IL-6 autocrinal/paracrinal malignancy and chemoresistance in glioblastoma. Oncotarget 2018; 7:42485-42501. [PMID: 27285760 PMCID: PMC5173150 DOI: 10.18632/oncotarget.9890] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 05/11/2016] [Indexed: 01/05/2023] Open
Abstract
Glioblastoma multiform (GBM) is one of the most lethal human malignant brain tumors with high risks of recurrence and poor treatment outcomes. The RNA-binding protein Musashi-1 (MSI1) is a marker of neural stem/progenitor cells. Recent study showed that high expression level of MSI1 positively correlates with advanced grade of GBM, where MSI1 increases the growth of GBM. Herein, we explore the roles of MSI1 as well as the underlying mechanisms in the regulation of drug resistance and tumorigenesis of GBM cells. Our results demonstrated that overexpression of MSI1 effectively protected GBM cells from drug-induced apoptosis through down-regulating pro-apoptotic genes; whereas inhibition of AKT withdrew the MSI1-induced anti-apoptosis and cell survival. We further showed that MSI1 robustly promoted the secretion of the pro-inflammatory cytokine IL-6, which was governed by AKT activity. Autonomously, the secreted IL-6 enhanced AKT activity in an autocrine/paracrine manner, forming a positive feedback regulatory loop with the MSI1-AKT pathway. Our results conclusively demonstrated a novel drug resistance mechanism in GBM cells that MSI1 inhibits drug-induced apoptosis through AKT/IL6 regulatory circuit. MSI1 regulates both cellular signaling and tumor-microenvironmental cytokine secretion to create an intra- and intercellular niche for GBM to survive from chemo-drug attack.
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Affiliation(s)
- Hsiao-Yun Chen
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Liang-Ting Lin
- Institute of Pharmacology, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Mong-Lien Wang
- Institute of Pharmacology, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shu-Hsien Lee
- Institute of Pharmacology, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ming-Long Tsai
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chi-Chang Tsai
- Institute of Pharmacology, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Wei-Hsiu Liu
- Graduate Institute of Medical Sciences, National Defense Medical Center, Department of Neurological Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Tzu-Chien Chen
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yi-Ping Yang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Graduate Institute of Medical Sciences, National Defense Medical Center, Department of Neurological Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yi-Yen Lee
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yuh-Lih Chang
- Institute of Pharmacology, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Pin-I Huang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Cancer Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yi-Wei Chen
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Cancer Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Wen-Liang Lo
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Division of Oral and Maxillofacial Surgery, Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shih-Hwa Chiou
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Institute of Pharmacology, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,School of Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ming-Teh Chen
- Institute of Clinical Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,School of Medicine, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
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Scopoletin suppresses IL-6 production from fibroblast-like synoviocytes of adjuvant arthritis rats induced by IL-1β stimulation. Int Immunopharmacol 2014; 17:1037-43. [PMID: 24455774 DOI: 10.1016/j.intimp.2013.10.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Scopoletin, a coumarin compound naturally occurring in many medicinal plants, has previously been demonstrated to ameliorate synovial inflammation and destruction of cartilage and bone in adjuvant arthritis (AA) rats. As interleukin (IL)-6 is critically involved in the initiation and development of rheumatoid arthritis (RA), the present study was performed to investigate the effect of scopoletin on IL-6 production from fibroblast-like synoviocytes (FLS) to get insight into its anti-RA mechanisms. FLS were isolated from synovial membrane tissues of AA rats, and stimulated with IL-1β (10 ng/mL). Scopoletin, at concentrations of 15, 30, and 60 μM, was shown to only moderately inhibit FLS proliferation, but dramatically reduce IL-6 production at both mRNA and protein levels. It also inhibited the phosphorylation of p38 mitogen-activated protein kinase, extracellular signal-regulated kinase (ERK), protein kinase C (PKC) and cAMP response element binding protein (CREB). These findings suggest that scopoletin exerts anti-RA action probably through suppressing IL-6 production from FLS via MAPK/PKC/CREB pathways.
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Adenosine A2B receptor-mediated leukemia inhibitory factor release from astrocytes protects cortical neurons against excitotoxicity. J Neuroinflammation 2012; 9:198. [PMID: 22894638 PMCID: PMC3458985 DOI: 10.1186/1742-2094-9-198] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 08/01/2012] [Indexed: 02/07/2023] Open
Abstract
Background Neuroprotective and neurotrophic properties of leukemia inhibitory factor (LIF) have been widely reported. In the central nervous system (CNS), astrocytes are the major source for LIF, expression of which is enhanced following disturbances leading to neuronal damage. How astrocytic LIF expression is regulated, however, has remained an unanswered question. Since neuronal stress is associated with production of extracellular adenosine, we investigated whether LIF expression in astrocytes was mediated through adenosine receptor signaling. Methods Mouse cortical neuronal and astrocyte cultures from wild-type and adenosine A2B receptor knock-out animals, as well as adenosine receptor agonists/antagonists and various enzymatic inhibitors, were used to study LIF expression and release in astrocytes. When needed, a one-way analysis of variance (ANOVA) followed by Bonferroni post-hoc test was used for statistical analysis. Results We show here that glutamate-stressed cortical neurons induce LIF expression through activation of adenosine A2B receptor subtype in cultured astrocytes and require signaling of protein kinase C (PKC), mitogen-activated protein kinases (MAPKs: p38 and ERK1/2), and the nuclear transcription factor (NF)-κB. Moreover, LIF concentration in the supernatant in response to 5′-N-ethylcarboxamide (NECA) stimulation was directly correlated to de novo protein synthesis, suggesting that LIF release did not occur through a regulated release pathway. Immunocytochemistry experiments show that LIF-containing vesicles co-localize with clathrin and Rab11, but not with pHogrin, Chromogranin (Cg)A and CgB, suggesting that LIF might be secreted through recycling endosomes. We further show that pre-treatment with supernatants from NECA-treated astrocytes increased survival of cultured cortical neurons against glutamate, which was absent when the supernatants were pre-treated with an anti-LIF neutralizing antibody. Conclusions Adenosine from glutamate-stressed neurons induces rapid LIF release in astrocytes. This rapid release of LIF promotes the survival of cortical neurons against excitotoxicity.
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Molgat ASD, Gagnon A, Sorisky A. Macrophage-induced preadipocyte survival depends on signaling through Akt, ERK1/2, and reactive oxygen species. Exp Cell Res 2010; 317:521-30. [PMID: 21056559 DOI: 10.1016/j.yexcr.2010.10.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 10/25/2010] [Accepted: 10/27/2010] [Indexed: 01/11/2023]
Abstract
Obesity is associated with adipose tissue remodeling, characterized by macrophage accumulation, adipocyte hypertrophy, and apoptosis. We previously reported that macrophage-conditioned medium (MacCM) protects preadipocytes from apoptosis, due to serum withdrawal, in a platelet-derived growth factor (PDGF)-dependent manner. We have now investigated the role of intracellular signaling pathways, activated in response to MacCM versus PDGF, in promoting preadipocyte survival. Exposure of 3T3-L1 preadipocytes to J774A.1-MacCM or PDGF strongly stimulated Akt and ERK1/2 phosphorylation from initially undetectable levels. Inhibition of the upstream regulators of Akt or ERK1/2, i.e. phosphoinositide 3-kinase (PI3K; using wortmannin or LY294002) or MEK1/2 (using UO126 or PD98509), abrogated the respective phosphorylation responses, and significantly impaired pro-survival activity. J774A.1-MacCM increased reactive oxygen species (ROS) levels by 3.4-fold, and diphenyleneiodonium (DPI) or N-acetyl cysteine (NAC) significantly inhibited pro-survival signaling and preadipocyte survival in response to J774A.1-MacCM. Serum withdrawal itself also increased ROS levels (2.1-fold), and the associated cell death was attenuated by DPI or NAC. In summary, J774A.1-MacCM-dependent 3T3-L1 preadipocyte survival requires the Akt and ERK1/2 signaling pathways. Furthermore, ROS generation by J774A.1-MacCM is required for Akt and ERK1/2 signaling to promote 3T3-L1 preadipocyte survival. These data suggest potential mechanisms by which macrophages may alter preadipocyte fate.
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Affiliation(s)
- André S D Molgat
- Chronic Disease Program, Ottawa Hospital Research Institute, Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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Kim MO, Lee YJ, Han HJ. Involvement of Cx43 phosphorylation in 5'-N-ethylcarboxamide-induced migration and proliferation of mouse embryonic stem cells. J Cell Physiol 2010; 224:187-94. [PMID: 20232318 DOI: 10.1002/jcp.22117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Despite a lot of gap junction research, the complex connection between gap junction and cell proliferation remains an exciting area of investigation. Thus, we examined the effect of connexin 43 (Cx43) on the migration and proliferation of embryonic stem (ES) cells and its related signaling pathways following stimulation with the adenosine analogue 5'-N-ethylcarboxamide (NECA). NECA increased phosphorylation of Cx43 which was blocked by caffeine, a non-selective adenosine receptor antagonist. In experiment to measure the gap junctional intercellular communication, NECA blocked transfer of Lucifer yellow to neighboring cells in a scrape loading/dye transfer (SL/DT) assay. In addition, NECA-induced phosphorylation of phosphoinositide 3-kinase (PI3K)/Akt, protein kinase C (PKC), mitogen-activated protein kinases (MAPKs), and nuclear factor-kappa B (NF-kappaB) signal pathways. Inhibition of these signaling pathways reduced NECA-induced phosphorylation of Cx43. Moreover, NECA-treated cells demonstrated phosphorylation of Src, which was blocked by caffeine. In this experiment, a disruption of Cx43 using Cx43-specific small interfering RNA (siRNA) also enhanced Src phosphorylation. In a further study, phosphorylations of integrin beta1, focal adhesion kinase (FAK), and paxillin by NECA were restrained by caffeine as well as the Src blocker, PP2. Finally, we identified that NECA-stimulated cell migration and expressions of cell-cycle regulatory proteins [cyclin D1, cyclin-dependent kinase (CDK) 4, cyclin E, and CDK2]; these increases were inhibited by caffeine, or PP2. We conclude that NECA-stimulated Cx43 phosphorylation mediated by PI3K/Akt, PKC, MAPKs, and NF-kappaB, which subsequently stimulated cell migration and proliferation through Src, integrin beta1, FAK, and paxillin signal pathways.
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Affiliation(s)
- Mi Ok Kim
- Department of Veterinary Physiology, Biotherapy Human Resources Center (BK 21), College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
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