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Harris DD, Sabe SA, Sabra M, Xu CM, Malhotra A, Broadwin M, Banerjee D, Abid MR, Sellke FW. Intramyocardial injection of hypoxia-conditioned extracellular vesicles modulates apoptotic signaling in chronically ischemic myocardium. JTCVS OPEN 2023; 15:220-228. [PMID: 37808040 PMCID: PMC10556811 DOI: 10.1016/j.xjon.2023.05.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/28/2023] [Accepted: 05/18/2023] [Indexed: 10/10/2023]
Abstract
Objective Limited treatments exist for nonoperative chronic coronary artery disease. Previously, our laboratory has investigated extracellular vesicle (EV) therapy as a potential treatment for chronic coronary artery disease using a swine model and demonstrated improved cardiac function in swine treated with intramyocardial EV injection. Here, we seek to investigate the potential cardiac benefits of EVs by using hypoxia-conditioned EVs (HEV). Specifically, this study aims to investigate the effect of HEV on apoptosis in chronically ischemic myocardium in swine. Methods Fourteen Yorkshire swine underwent placement of an ameroid constrictor on the left circumflex artery. Two weeks later, swine underwent redo left thoracotomy with injection of either saline (control, n = 7) or HEVs (n = 7). After 5 weeks, swine were euthanized for tissue collection. Terminal deoxynucleotidyl transferase dUTP nick end labeling was used to quantify apoptosis. Immunoblotting was used for protein quantification. Results Terminal deoxynucleotidyl transferase dUTP nick end labeling staining showed a decrease in apoptosis in the HEV group compared with the control (P = .049). The HEV group exhibited a significant increase in the anti-apoptotic signaling molecule phospho-BAD (P = .005), a significant decrease in B-cell lymphoma 2 (P = .006) and an increase in the phospho-B-cell lymphoma to B-cell lymphoma 2 ratio (P < .001). Furthermore, the HEV group exhibited increased levels of prosurvival signaling markers including phosphoinositide 3-kinase, phosphor-extracellular signal-regulated kinase 1/2, phospho-forkhead box protein O1, and phospho-protein kinase B to protein kinase B ratio (all P < .05). Conclusions In chronic myocardial ischemia, treatment with HEV results in a decrease in overall apoptosis, possibly through the activation of both pro-survival and anti-apoptotic signaling pathways.
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Affiliation(s)
- Dwight D. Harris
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
| | - Sharif A. Sabe
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
| | - Mohamed Sabra
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
| | - Cynthia M. Xu
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
| | - Akshay Malhotra
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
| | - Mark Broadwin
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
| | - Debolina Banerjee
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
| | - M. Ruhul Abid
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
| | - Frank W. Sellke
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI
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Concurrent Akt, ERK1/2 and AMPK Activation by Obestatin Inhibits Apoptotic Signaling Cascades on Nutrient-Deprived PC12 Cells. Cell Mol Neurobiol 2021; 42:1607-1614. [PMID: 33400083 PMCID: PMC9142446 DOI: 10.1007/s10571-020-01025-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 12/02/2020] [Indexed: 01/08/2023]
Abstract
Targeting apoptosis in the ischemic penumbra is a rational therapeutic approach for restricting cerebral infarct volume after clinical stroke. The present work explored the capability of the obestatin peptide, as a novel approach to inhibit apoptotic signaling cascades on PC12 cells. According to the results, obestatin treatment significantly reduced nutrient deprivation-induced apoptotic cell death. The protective effects were related to the regulation of the anti-apoptotic protein, BCL-2, and the apoptotic protein caspase-3. This encompasses the control of apoptosis by the interplay between Akt, ERK1/2 and AMPK signaling pathways. The activation of Akt and AMPK was concomitant with the phosphorylation of their downstream targets, GSK3 and ACC, respectively. Besides, obestatin also causes FoxO1 nuclear export supporting the prevention of the apoptosome formation. The concurrent activation of Akt and AMPK by obestatin via the GPR39 receptor, supports a role for this system in the balance concerning the catabolic and the anabolic signaling to sustain cellular function and viability. Furthermore, these results provide both an insight into how the obestatin/GPR39 system regulates anti-apoptotic pathways, and a framework for ascertaining how this system can be optimally targeted in treatment of brain cell death after stroke.
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Wen Y, Zhang X, Liu X, Huo Y, Gao Y, Yang Y. Suppression of lncRNA SNHG15 protects against cerebral ischemia-reperfusion injury by targeting miR-183-5p/FOXO1 axis. Am J Transl Res 2020; 12:6250-6263. [PMID: 33194027 PMCID: PMC7653613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 08/22/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Cerebral ischemia/reperfusion (I/R) injury is a severe complication during the treatment of patients with stroke. It has been shown that the expression of SNHG15 was increased in patients with ischemic stroke (IS). However, the function and regulatory mechanism of SNHG15 in IS remains unclear. METHODS An oxygen glucose deprivation/reoxygenation (OGD/R) cell model was use to establish an in vitro model of I/R injury. RT-qPCR assay was used to detect the level of SNHG15 in OGD/R-treated SH-SY5Y cells. Meanwhile, middle cerebral artery occlusion (MCAO) was used to establish an in vivo model of cerebral I/R injury. RESULTS The expression of SNHG15 was upregulated in OGD/R-treated SH-SY5Y cells. Downregulation of SNHG15 during reperfusion reduced cell death in OGD/R-treated SH-SY5Y cells. In addition, SNHG15 knockdown suppressed OGD/R-induced apoptosis in SY-SY5Y cells by attenuating intracellular ROS generation and reducing mitochondrial membrane potential (MMP) lost. In addition, SNHG15 knockdown promoted cell cycle transition in SY-SY5Y cells after OGD/R insult accompany with PI3K/Akt signaling activation. Meanwhile, mechanism investigations suggested SNHG15 knockdown downregulated the expression of FOXO1 through acting as a competitive 'sponge' of miR-183-5p. Most importantly, knockdown of SNHG15 expression in vivo inhibited neuronal apoptosis and decreased infarct area in MCAO rats. CONCLUSION Thus, the present study indicated that SNHG15 knockdown protected against cerebral I/R injury via targeting miR-183-5p/FOXO1 axis, which may represent a potential therapeutic option for the treatment of cerebral IS.
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Affiliation(s)
- Ya Wen
- Department of Neurology, The Second Hospital of Hebei Medical UniversityShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of NeurologyShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of Vascular HomeostasisShijiazhuang 050000, Hebei, P. R. China
| | - Xiangjian Zhang
- Department of Neurology, The Second Hospital of Hebei Medical UniversityShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of NeurologyShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of Vascular HomeostasisShijiazhuang 050000, Hebei, P. R. China
| | - Xiaoyun Liu
- Department of Neurology, The Second Hospital of Hebei Medical UniversityShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of NeurologyShijiazhuang 050000, Hebei, P. R. China
| | - Yinghao Huo
- Department of Neurology, The Second Hospital of Hebei Medical UniversityShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of NeurologyShijiazhuang 050000, Hebei, P. R. China
| | - Yuxiao Gao
- Department of Neurology, The Second Hospital of Hebei Medical UniversityShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of NeurologyShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of Vascular HomeostasisShijiazhuang 050000, Hebei, P. R. China
| | - Yi Yang
- Department of Neurology, The Second Hospital of Hebei Medical UniversityShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of NeurologyShijiazhuang 050000, Hebei, P. R. China
- Hebei Key Laboratory of Vascular HomeostasisShijiazhuang 050000, Hebei, P. R. China
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Li HL, Wang LH, Hu YL, Feng Y, Li XH, Liu YF, Li P, Mao QS, Xue WJ. Clinical and prognostic significance of CC chemokine receptor type 8 protein expression in gastrointestinal stromal tumors. World J Gastroenterol 2020; 26:4656-4668. [PMID: 32884223 PMCID: PMC7445867 DOI: 10.3748/wjg.v26.i31.4656] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 06/07/2020] [Accepted: 07/18/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms of the gastrointestinal tract. Surgical resection and tyrosine kinase inhibitors are defined as the main treatments but cannot cure patients with advanced GIST, which eventually develops into recurrence and acquired drug resistance. Therefore, it is necessary to identify prognostic biomarkers and new therapeutic targets for GISTs. CC chemokine receptor type 8 (CCR8) protein participates in regulation of immune responses. Recent studies on CCR8 in non-small cell lung cancer and colorectal cancer showed that it was highly expressed in tumor-infiltrating regulatory T cells and correlated with a poor prognosis.
AIM To detect CCR8 expression in GIST tissues and analyze its relationships with clinicopathological features and prognosis in patients with GISTs.
METHODS Tissue samples were used for the tissue microarrays construction. The microarrays were then subjected to immunohistochemical analyses to detect CCR8 expression. Next, Kaplan–Meier analysis was utilized to calculate the survival rate of patients with complete follow-up data, and the potential prognostic value of CCR8 was evaluated by Cox regression analysis. Finally, a Gene Ontology/Kyoto Encyclopedia of Genes and Genomes single-gene enrichment chart of CCR8 was constructed using the STRING database.
RESULTS CCR8-positive signals were detected as brown or brown-yellow particles by immunohistochemistry located in the cytoplasm. Among 125 tissue samples, 74 had CCR8 high expression and 51 had low or negative expression. Statistical analyses suggested CCR8 was significantly correlated with tumor size, mitotic index, AFIP-Miettinen risk classification and tumor location. Kaplan–Meier and multivariate analyses showed that patients with low or negative CCR8 expression, mitotic index < 5/high-power fields (HPF) and tumor diameter < 5 cm had a better prognosis. Based on the STRING database, CCR8 was significantly enriched in biological processes such as tumor immunity, T lymphocyte chemotaxis, migration and pathways like the nuclear factor-κB and tumor necrosis factor pathways as well as intestinal immune regulation networks.
CONCLUSION CCR8 is a prognostic biomarker for malignant potential of GISTs, with high expression correlated with malignancy and poor prognosis.
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Affiliation(s)
- Huai-Liang Li
- Department of Gastrointestinal Surgery, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
| | - Lin-Hua Wang
- Department of Intensive Care Unit, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
| | - Yi-Lin Hu
- Department of Gastrointestinal Surgery, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
| | - Ying Feng
- Department of Gastrointestinal Surgery, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
| | - Xiao-Hong Li
- Department of Surgical Comprehensive Laboratory, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
| | - Yi-Fei Liu
- Department of Pathology, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
| | - Peng Li
- Department of Gastrointestinal Surgery, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
| | - Qin-Sheng Mao
- Department of Gastrointestinal Surgery, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
| | - Wan-Jiang Xue
- Department of Gastrointestinal Surgery, Nantong University Affiliated Hospital, Nantong 226001, Jiangsu Province, China
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Elucidating the mechanism of action of alpha-1-antitrypsin using retinal pigment epithelium cells exposed to high glucose. Potential use in diabetic retinopathy. PLoS One 2020; 15:e0228895. [PMID: 32032388 PMCID: PMC7006930 DOI: 10.1371/journal.pone.0228895] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 01/24/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Alpha-1-antitrypsin is a protein involved in avoidance of different processes that are seen in diabetic retinopathy pathogenesis. These processes include apoptosis, extracellular matrix remodeling and damage of vessel walls and capillaries. Furthermore, because of its anti-inflammatory effects, alpha-1-antitrypsin has been proposed as a possible therapeutic approach for diabetic retinopathy. Our group tested alpha-1-antitrypsin in a type 1 diabetes mouse model and observed a reduction of inflammation and retinal neurodegeneration. Thus, shedding light on the mechanism of action of alpha-1-antitrypsin at molecular level may explain how it works in the diabetic retinopathy context and show its potential for use in other retinal diseases. METHODS In this work, we evaluated alpha-1-antitrypsin in an ARPE-19 human cell line exposed to high glucose. We explored the expression of different mediators on signaling pathways related to pro-inflammatory cytokines production, glucose metabolism, epithelial-mesenchymal transition and other proteins involved in the normal function of retinal pigment epithelium by RT-qPCR and Western Blot. RESULTS We obtained different expression patterns for evaluated mediators altered with high glucose exposure and corrected with the use of alpha-1-antitrypsin. CONCLUSIONS The expression profile obtained in vitro for the evaluated proteins and mRNA allowed us to explain our previous results obtained on mouse models and to hypothesize how alpha-1-antitrypsin hinder diabetic retinopathy progression on a complex network between different signaling pathways. GENERAL SIGNIFICANCE This network helps to understand the way alpha-1-antitrypsin works in diabetic retinopathy and its scope of action.
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