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Lyu MA, Huang M, Zeng K, Li L, Khoury JD, Nishimoto M, Ma H, Sadeghi T, Mukherjee S, Slutsky AS, Flowers CR, Parmar S. Allogeneic cord blood regulatory T cells can resolve lung inflammation. Cytotherapy 2023; 25:245-253. [PMID: 36437190 DOI: 10.1016/j.jcyt.2022.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 09/13/2022] [Accepted: 10/27/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND AIMS CD4+CD25+CD127lo regulatory T cells (Tregs) are responsible for maintaining immune homeostasis. Tregs can be rendered defective and deficient as a result of the immune imbalance seen in lung injury, and such dysfunction can play a major role in continued tissue inflammation. The authors hypothesized that adoptive therapy with healthy allogeneic umbilical cord blood (UCB)-derived Tregs may be able to resolve inflammation. RESULTS Ex vivo-expanded UCB Tregs exhibited a unique phenotype with co-expression of CD45RA+CD45RO+ >80% and lung homing markers, including CD49d. UCB Tregs did not turn pathogenic when exposed to IL-6. Co-culture with increasing doses of dexamethasone led to a synergistic increase in UCB Treg-induced apoptosis of conventional T cells (Tcons), which translated into significantly higher suppression of proliferating Tcons, especially at a lower Treg:Tcon ratio. Multiple injections of UCB Tregs led to their preferential accumulation in lung tissue in an immune injury xenogenic model. A significant decrease in lung resident cytotoxic CD8+ T cells (P = 0.0218) correlated with a sustained decrease in their systemic distribution compared with controls (P < 0.0001) (n = 7 per arm) as well as a decrease in circulating human soluble CD40 ligand level (P = 0.031). Tissue architecture was preserved in the treatment arm, and a significant decrease in CD3+ and CD8+ burden was evident in immunohistochemistry analysis. CONCLUSIONS UCB Treg adoptive therapy is a promising therapeutic strategy for treatment of lung injury.
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Affiliation(s)
- Mi-Ae Lyu
- Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Meixian Huang
- Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Ke Zeng
- Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Li Li
- Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Joseph D Khoury
- Department of Hematopathology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Mitsutaka Nishimoto
- Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Hongbing Ma
- Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | | | - Siddhartha Mukherjee
- Division of Hematology/Oncology, Department of Medicine, New York-Presbyterian Hospital, Columbia University Irving Medical Center, New York, New York, USA
| | - Arthur S Slutsky
- Keenan Research Center, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, University of Toronto, Toronto, Canada
| | - Christopher R Flowers
- Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Simrit Parmar
- Department of Lymphoma/Myeloma, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA.
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Bösmüller H, Matter M, Fend F, Tzankov A. The pulmonary pathology of COVID-19. Virchows Arch 2021; 478:137-150. [PMID: 33604758 PMCID: PMC7892326 DOI: 10.1007/s00428-021-03053-1] [Citation(s) in RCA: 98] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 01/08/2023]
Abstract
The lung is the main affected organ in severe coronavirus disease 2019 (COVID-19) caused by the novel coronavirus SARS-CoV-2, and lung damage is the leading cause of death in the vast majority of patients. Mainly based on results obtained by autopsies, the seminal features of fatal COVID-19 have been described by many groups worldwide. Early changes encompass edema, epithelial damage, and capillaritis/endothelialitis, frequently combined with microthrombosis. Subsequently, patients with manifest respiratory insufficiency exhibit exudative diffuse alveolar damage (DAD) with hyaline membrane formation and pneumocyte type 2 hyperplasia, variably complicated by superinfection, which may progress to organizing/fibrotic stage DAD. These features, however, are not specific for COVID-19 and can be found in other disorders including viral infections. Clinically, the early disease stage of severe COVID-19 is characterized by high viral load, lymphopenia, massive secretion of pro-inflammatory cytokines and hypercoagulability, documented by elevated D-dimers and an increased frequency of thrombotic and thromboembolic events, whereas virus loads and cytokine levels tend to decrease in late disease stages, when tissue repair including angiogenesis prevails. The present review describes the spectrum of lung pathology based on the current literature and the authors' personal experience derived from clinical autopsies, and tries to summarize our current understanding and open questions of the pathophysiology of severe pulmonary COVID-19.
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Affiliation(s)
- Hans Bösmüller
- Institute of Pathology and Neuropathology, University Hospital Tübingen and Eberhard Karls University Tübingen, Liebermeisterstraße 8, 72076, Tübingen, Germany
| | - Matthias Matter
- Pathology, Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Falko Fend
- Institute of Pathology and Neuropathology, University Hospital Tübingen and Eberhard Karls University Tübingen, Liebermeisterstraße 8, 72076, Tübingen, Germany.
| | - Alexandar Tzankov
- Pathology, Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland.
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Haddad J, Latoche JD, Nigam S, Bellavia MC, Day KE, Zhu Q, Edwards WB, Anderson CJ, Tavakoli S. Molecular Imaging of Very Late Antigen-4 in Acute Lung Injury. J Nucl Med 2020; 62:280-286. [DOI: 10.2967/jnumed.120.242347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 06/23/2020] [Indexed: 11/16/2022] Open
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Fan J, Lv H, Li J, Che Y, Xu B, Tao Z, Jiang W. Roles of Nrf2/HO-1 and HIF-1α/VEGF in lung tissue injury and repair following cerebral ischemia/reperfusion injury. J Cell Physiol 2018; 234:7695-7707. [PMID: 30565676 DOI: 10.1002/jcp.27767] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 10/30/2018] [Indexed: 12/22/2022]
Abstract
Cerebral ischemia/reperfusion injury (CIRI) leads to injury in distant organs, most commonly the lungs, although limited studies have examined self-protective mechanisms during CIRI-induced lung injury. Here, we investigated self-protective mechanisms that attenuate stress-related injury and promote the angiogenetic repair of epithelial function during CIRI-induced lung injury by measuring nuclear factor erythroid-related factor 2 (Nrf2) and hypoxia-inducible factor-1α (HIF-1α) levels. A CIRI model was established in male Sprague-Dawley rats by blocking the middle cerebral artery. Rats were divided into five subgroups based on the reperfusion time (6, 12, 24, 48, and 72 hr). Lung injury was assessed using a semiquantitative score and a thiobarbituric acid-based method of determining malonaldehyde production. Lung tissue angiogenesis was detected by CD34 and CD31 immunolabeling. Changes in Nrf2, heme oxygenase-1 (HO-1), HIF-1α, vascular-endothelial growth factor (VEGF), phosphatidylinositol 3-kinase (PI3K), extracellular-regulated kinase1/2 (ERK1/2), and phospho-ERK1/2 ( p-ERK1/2) protein- and mRNA-expression levels were measured by immunohistochemistry and reverse transcription polymerase chain reactions, respectively. Oxidative stress induced by cerebral ischemia/reperfusion (CI/R) caused lung injury. Expression of the Nrf2/HO-1 antioxidative stress pathway in lung tissues increased following CI/R, peaking after 24 hr. PI3K, ERK, and p-ERK1/2, which act upstream of Nrf2/HO-1, were expressed at higher levels in the CI/R-model group, consistent with the general trends observed for Nrf2/HO-1. Within 72 hr post-CI/R, HIF-1α, and VEGF expression significantly increased versus the sham group. Thus, during CIRI-induced lung injury, the body may upregulate antioxidative stress activities and promote angiogenesis to repair the endothelial barrier through the Nrf2/HO-1 and HIF-1α/VEGF signaling pathways, enabling self-protection.
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Affiliation(s)
- Jianhua Fan
- Department of Neurology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Hui Lv
- Department of Neurology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Jie Li
- Department of Neurology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yuqin Che
- Department of Neurology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Baoning Xu
- Department of Thoracic Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Zuo Tao
- Department of China Medical University, Shenyang, China
| | - Wenjun Jiang
- Department of Thoracic Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
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Chen Z, Chen Q, Du H, Xu L, Wan J. Mesenchymal stem cells and CXC chemokine receptor 4 overexpression improved the therapeutic effect on colitis via mucosa repair. Exp Ther Med 2018; 16:821-829. [PMID: 30112037 PMCID: PMC6090451 DOI: 10.3892/etm.2018.6233] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 05/15/2018] [Indexed: 12/11/2022] Open
Abstract
The present study intended to observe the homing capability and therapeutic effect of CXC chemokine receptor 4 (CXCR-4) gene overexpressed bone marrow mesenchymal stem cells (BMSCs) on colitis, and to study the possible mechanisms involved. BMSCs were derived from male BALB/c mice and CXCR-4 gene was transfected into BMSCs by the utilization of the lentiviral vector. The expression of CXCR-4 gene was analyzed and the biological characteristics, and vitality of BMSCs and CXCR-4 gene overexpressed BMSCs (CXCR-BMSCs) were detected. The chemotaxis assay was performed to investigate migration in vitro. Colitis was induced by TNBS in female BALB/c mice. BMSCs and CXCR-BMSCs were injected into experimental models intravenously. The homing of cells was confirmed by fluorescence observation and Sry gene detection. Clinical manifestation and histological changes were also evaluated. The expression levels of occludin and vascular endothelial growth factor (VEGF) were detected to measure mucosal repair. Furthermore, CXCR-4 gene was successfully transfected into BMSCs by the utilization of lentiviral vector. Results indicated that overexpression of CXCR-4 gene did not influence the biological characteristics and vitality of BMSCs, but enhanced the capability of migration and homing of BMSCs in vitro and in vivo. Notably, CXCR-BMSCs had an improved effect on treating colitis, and the expression levels of Occludin and VEGF were higher. The results suggested that overexpression of CXCR-4 gene may enhance BMSC homing to damaged intestinal mucosa and their curative effect on colitis. The present findings indicated that using lentiviral vector to transfect CXCR-4 gene into BMSCs may be a potential method to improve the outcomes of BMSCs treatment on inflammatory bowel disease.
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Affiliation(s)
- Zheng Chen
- Department of Geriatric Gastroenterology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Qianqian Chen
- Department of Geriatric Gastroenterology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Haitao Du
- Department of Geriatric Gastroenterology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Lijuan Xu
- Department of Geriatric Gastroenterology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Jun Wan
- Department of Geriatric Gastroenterology, Chinese PLA General Hospital, Beijing 100853, P.R. China
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Preparation of drug-loaded small unilamellar liposomes and evaluation of their potential for the treatment of chronic respiratory diseases. Int J Pharm 2018; 545:378-388. [PMID: 29678545 DOI: 10.1016/j.ijpharm.2018.04.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 03/15/2018] [Accepted: 04/16/2018] [Indexed: 01/08/2023]
Abstract
The aim of the present investigation was to evaluate the influence of liposome formulation on the ability of vesicles to penetrate a pathological mucus model obtained from COPD affected patients in order to assess the potential of such vesicles for the treatment of chronic respiratory diseases by inhalation. Therefore, Small Unilamellar Liposomes (PLAIN-LIPOSOMEs), Pluronic® F127-surface modified liposomes (PF-LIPOSOMEs) and PEG 2000PE-surface modified liposomes (PEG-LIPOSOMEs) were prepared using the micelle-to-vesicle transition (MVT) method and beclomethasone dipropionate (BDP) as model drug. The obtained liposomes showed diameters in the range of 40-65 nm, PDI values between 0.25 and 0.30 and surface electric charge essentially close to zero. The encapsulation efficiency was found to be dependent on the BDP/lipid ratio used and, furthermore, BDP-loaded liposomes were stable in size both at 37 °C and at 4 °C. All liposomes were not cytotoxic on H441 cell line as assessed by the MTT assay. The liposome uptake was evaluated through a cytofluorimetric assay that showed a non-significant reduction in the internalization of PEG-LIPOSOMEs as compared with PLAIN-LIPOSOMEs. The penetration studies of mucus from COPD patients showed that the PEG-LIPOSOMEs were the most mucus-penetrating vesicles after 27 h. In addition, PEG- and PF-LIPOSOMEs did not cause any effect on bronchoalveolar lavage fluid proteins after aerosol administration in the mouse. The results highlight that PEG-LIPOSOMEs show the most interesting features in terms of penetration through the pathologic sputum, uptake by airway epithelial cells and safety profile.
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Highly Efficient In Vitro Reparative Behaviour of Dental Pulp Stem Cells Cultured with Standardised Platelet Lysate Supplementation. Stem Cells Int 2016; 2016:7230987. [PMID: 27774106 PMCID: PMC5059612 DOI: 10.1155/2016/7230987] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 08/04/2016] [Accepted: 08/07/2016] [Indexed: 11/17/2022] Open
Abstract
Dental pulp is an accessible source of multipotent mesenchymal stromal cells (MSCs). The perspective role of dental pulp stem cells (DPSCs) in regenerative medicine demands an in vitro expansion and in vivo delivery which must deal with the safety issues about animal serum, usually required in cell culture practice. Human platelet lysate (PL) contains autologous growth factors and has been considered as valuable alternative to fetal bovine serum (FBS) in cell cultures. The optimum concentration to be added of such supplement is highly dependent on its preparation whose variability limits comparability of results. By in vitro experiments, we aimed to evaluate a standardised formulation of pooled PL. A low selected concentration of PL (1%) was able to support the growth and maintain the viability of the DPSCs. The use of PL in cell cultures did not impair cell surface signature typically expressed by MSCs and even upregulated the transcription of Sox2. Interestingly, DPSCs cultured in presence of PL exhibited a higher healing rate after injury and are less susceptible to toxicity mediated by exogenous H2O2 than those cultured with FBS. Moreover, PL addition was shown as a suitable option for protocols promoting osteogenic and chondrogenic differentiation of DPSCs. Taken together, our results indicated that PL is a valid substitute of FBS to culture and differentiate DPSCs for clinical-grade use.
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Skirecki T, Kawiak J, Machaj E, Pojda Z, Wasilewska D, Czubak J, Hoser G. Early severe impairment of hematopoietic stem and progenitor cells from the bone marrow caused by CLP sepsis and endotoxemia in a humanized mice model. Stem Cell Res Ther 2015; 6:142. [PMID: 26272069 PMCID: PMC4536694 DOI: 10.1186/s13287-015-0135-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Revised: 03/23/2015] [Accepted: 07/17/2015] [Indexed: 12/27/2022] Open
Abstract
Introduction An effective immune response to severe bacterial infections requires a robust production of the innate immunity cells from hematopoietic stem and progenitor cells (HSPCs) in a process called emergency myelopoiesis. In sepsis, an altered immune response that leads to a failure of bacterial clearance is often observed. In this study, we aimed to evaluate the impact of sepsis on human HSPCs in the bone marrow (BM) microenvironment of humanized mice subjected to acute endotoxemia and polymicrobial sepsis. Methods Humanized mice (hu-NSG) were generated by transplanting NOD.Cg-Prkdc/scidIL2rγ (NSG) mice with the human cord blood CD34+ cells. Eight weeks after the transplantation, hu-NSG mice were subjected to sepsis induced by endotoxemia—Escherichia coli lipopolysaccharide (LPS)—or by cecal ligation and puncture (CLP). Twenty-four hours later, HSPCs from BM were analyzed by flow cytometry and colony-forming unit (CFU) assay. CLP after inhibition of Notch signaling was also performed. The effects of LPS on the in vitro proliferation of CD34+ cells from human BM were tested by CellTrace Violet dye staining. Results The expression of Toll-like receptor 4 receptor was present among engrafted human HSPCs. Both CLP and endotoxemia decreased (by 43 % and 37 %) cellularity of the BM. In addition, in both models, accumulation of early CD34+ CD38− HSCs was observed, but the number of CD34+ CD38+ progenitors decreased. After CLP, there was a 1.5-fold increase of proliferating CD34+ CD38−Ki-67+ cells. Moreover, CFU assay revealed a depressed (by 75 % after LPS and by 50 % after CLP) production of human hematopoietic colonies from the BM of septic mice. In contrast, in vitro LPS stimulated differentiation of CD34+ CD38− HSCs but did not induce proliferation of these cells in contrast to the CD34+ CD38+ progenitors. CLP sepsis modulated the BM microenvironment by upregulation of Jagged-1 expression on non-hematopoietic cells, and the proliferation of HSCs was Notch-dependent. Conclusions CLP sepsis and endotoxemia induced a similar expansion and proliferation of early HSCs in the BM, while committed progenitors decreased. It is suggestive that the Notch pathway contributed to this effect. Targeting early hematopoiesis may be considered as a viable alternative in the existing arsenal of supportive therapies in sepsis.
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Affiliation(s)
- Tomasz Skirecki
- Department of Flow Cytometry, The Center of Postgraduate Medical Education, Marymoncka 99/103, 01-813, Warsaw, Poland. .,Department of Anesthesiology and Intensive Care Medicine, The Center of Postgraduate Medical Education, Czerniakowska 231, 00-416, Warsaw, Poland.
| | - Jerzy Kawiak
- Department of Flow Cytometry, The Center of Postgraduate Medical Education, Marymoncka 99/103, 01-813, Warsaw, Poland.
| | - Eugeniusz Machaj
- Department of Cellular Engineering, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, W. Roentgena 5, 02-781, Warsaw, Poland.
| | - Zygmunt Pojda
- Department of Cellular Engineering, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, W. Roentgena 5, 02-781, Warsaw, Poland.
| | - Danuta Wasilewska
- Department of Clinical Cytology, The Center of Postgraduate Medical Education, Marymocnka 99/103, 01-813, Warsaw, Poland.
| | - Jarosław Czubak
- Department of Pediatric Orthopedics, The Center of Postgraduate Medical Education, Konarskiego 13, 05-400, Otwock, Poland.
| | - Grażyna Hoser
- Department of Clinical Cytology, The Center of Postgraduate Medical Education, Marymocnka 99/103, 01-813, Warsaw, Poland.
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Stimulation of β2-adrenergic receptor increases CFTR function and decreases ATP levels in murine hematopoietic stem/progenitor cells. J Cyst Fibros 2014; 14:26-33. [PMID: 25178873 DOI: 10.1016/j.jcf.2014.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 07/15/2014] [Accepted: 08/11/2014] [Indexed: 01/27/2023]
Abstract
BACKGROUND The chloride channel CFTR (Cystic Fibrosis Transmembrane Conductance Regulator) is expressed by many cell types, including hematopoietic stem/progenitor cells (HSPCs). In this study, we sought to better comprehend the regulation of CFTR activity in HSPCs, namely by beta-adrenergic stimuli. METHODS The expression of β2-adrenergic receptor (β2-AR) in murine Sca-1(+) HSPCs was investigated by immunofluorescence/confocal microscopy and flow-cytometric analysis. Association with CFTR was assessed by immunoprecipitation. HSPCs were evaluated for ATP content and CFTR activity by means of luminometric and spectrofluorometric methods, respectively, upon stimulation with salbutamol. RESULTS HSPCs express β2-AR over the whole plasma membrane and are associated in cellula with both the immature and mature forms of CFTR. β2-AR was predominantly expressed by HSPCs with bigger size. CFTR channel activity was increased by salbutamol treatment and this activation was inhibited by either a specific CFTR inhibitor (CFTRinh172) or a β2-AR receptor inhibitor (ICI 118,551). Intracellular ATP levels were reduced by salbutamol stimulation and this effect was reversed when ICI 118,551 or CFTR inhibitors were present. A trend in the increase of extracellular ATP upon salbutamol stimulation was observed. CONCLUSIONS In HSPCs, CFTR is regulated by β2-adrenergic receptor stimulation determining intracellular ATP depletion.
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Hematopoietic and mesenchymal stem cells for the treatment of chronic respiratory diseases: role of plasticity and heterogeneity. ScientificWorldJournal 2014; 2014:859817. [PMID: 24563632 PMCID: PMC3916026 DOI: 10.1155/2014/859817] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 10/20/2013] [Indexed: 12/21/2022] Open
Abstract
Chronic lung diseases, such as cystic fibrosis (CF), asthma, and chronic obstructive pulmonary disease (COPD) are incurable and represent a very high social burden. Stem cell-based treatment may represent a hope for the cure of these diseases. In this paper, we revise the overall knowledge about the plasticity and engraftment of exogenous marrow-derived stem cells into the lung, as well as their usefulness in lung repair and therapy of chronic lung diseases. The lung is easily accessible and the pathophysiology of these diseases is characterized by injury, inflammation, and eventually by remodeling of the airways. Bone marrow-derived stem cells, including hematopoietic stem/progenitor cells (HSPCs) and mesenchymal stromal (stem) cells (MSCs), encompass a wide array of cell subsets with different capacities of engraftment and injured tissue regenerating potential. Proof-of-principle that marrow cells administered locally may engraft and give rise to specialized epithelial cells has been given, but the efficiency of this conversion is too limited to give a therapeutic effect. Besides the identification of plasticity mechanisms, the characterization/isolation of the stem cell subpopulations represents a major challenge to improving the efficacy of transplantation protocols used in regenerative medicine for lung diseases.
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Pro-inflammatory effect of cystic fibrosis sputum microparticles in the murine lung. J Cyst Fibros 2013; 12:721-8. [DOI: 10.1016/j.jcf.2013.03.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 02/20/2013] [Accepted: 03/05/2013] [Indexed: 12/25/2022]
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Conese M, Carbone A, Castellani S, Di Gioia S. Paracrine effects and heterogeneity of marrow-derived stem/progenitor cells: relevance for the treatment of respiratory diseases. Cells Tissues Organs 2013; 197:445-73. [PMID: 23652321 DOI: 10.1159/000348831] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/12/2013] [Indexed: 11/19/2022] Open
Abstract
Stem cell-based treatment may represent a hope for the treatment of acute lung injury and pulmonary fibrosis, and other chronic lung diseases, such as cystic fibrosis, asthma and chronic obstructive pulmonary disease (COPD). It is well established in preclinical models that bone marrow-derived stem and progenitor cells exert beneficial effects on inflammation, immune responses and repairing of damage in virtually all lung-borne diseases. While it was initially thought that the positive outcome was due to a direct engraftment of these cells into the lung as endothelial and epithelial cells, paracrine factors are now considered the main mechanism through which stem and progenitor cells exert their therapeutic effect. This knowledge has led to the clinical use of marrow cells in pulmonary hypertension with endothelial progenitor cells (EPCs) and in COPD with mesenchymal stromal (stem) cells (MSCs). Bone marrow-derived stem cells, including hematopoietic stem/progenitor cells, MSCs, EPCs and fibrocytes, encompass a wide array of cell subsets with different capacities of engraftment and injured tissue-regenerating potential. The characterization/isolation of the stem cell subpopulations represents a major challenge to improve the efficacy of transplantation protocols used in regenerative medicine and applied to lung disorders.
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Affiliation(s)
- Massimo Conese
- Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy.
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