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Nikouee A, Yap JQ, Rademacher DJ, Kim M, Zang QS. An Optimized Langendorff-free Method for Isolation and Characterization of Primary Adult Cardiomyocytes. Res Sq 2024:rs.3.rs-4131724. [PMID: 38585995 PMCID: PMC10996804 DOI: 10.21203/rs.3.rs-4131724/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Isolation of adult mouse cardiomyocytes is an essential technique for advancing our understanding of cardiac physiology and pathology, and for developing therapeutic strategies to improve cardiac health. Traditionally, cardiomyocytes are isolated from adult mouse hearts using the Langendorff perfusion method in which the heart is excised, cannulated, and retrogradely perfused through the aorta. While this method is highly effective for isolating cardiomyocytes, it requires specialized equipment and technical expertise. To address the challenges of the Langendorff perfusion method, researchers have developed a Langendorff-free technique for isolating cardiomyocytes. This Langendorff-free technique involves anterograde perfusion through the coronary vasculature by clamping the aorta and intraventricular injection. This method simplifies the experimental setup by eliminating the need for specialized equipment and cannulation of the heart. Here, we introduce an updated Langendorff-free method for isolating adult mice cardiomyocytes that builds on the Langendorff-free protocols developed previously. In this method, the aorta is clamped in situ, and the heart is perfused using a peristaltic pump, water bath, and an injection needle. This simplicity makes cardiomyocyte isolation more accessible for researchers who are new to cardiomyocyte isolation or are working with limited resources. In this report, we provide a step-by-step description of our optimized protocol. In addition, we present example studies of analyzing mitochondrial structural and functional characteristics in isolated cardiomyocytes treated with and without the acute inflammatory stimuli lipopolysaccharide (LPS).
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Ji HL, Xi NMS, Mohan C, Yan X, Jain KG, Zang QS, Gahtan V, Zhao R. Biomarkers and molecular endotypes of sarcoidosis: lessons from omics and non-omics studies. Front Immunol 2024; 14:1342429. [PMID: 38250062 PMCID: PMC10797773 DOI: 10.3389/fimmu.2023.1342429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 12/05/2023] [Indexed: 01/23/2024] Open
Abstract
Sarcoidosis is a chronic granulomatous disorder characterized by unknown etiology, undetermined mechanisms, and non-specific therapies except TNF blockade. To improve our understanding of the pathogenicity and to predict the outcomes of the disease, the identification of new biomarkers and molecular endotypes is sorely needed. In this study, we systematically evaluate the biomarkers identified through Omics and non-Omics approaches in sarcoidosis. Most of the currently documented biomarkers for sarcoidosis are mainly identified through conventional "one-for-all" non-Omics targeted studies. Although the application of machine learning algorithms to identify biomarkers and endotypes from unbiased comprehensive Omics studies is still in its infancy, a series of biomarkers, overwhelmingly for diagnosis to differentiate sarcoidosis from healthy controls have been reported. In view of the fact that current biomarker profiles in sarcoidosis are scarce, fragmented and mostly not validated, there is an urgent need to identify novel sarcoidosis biomarkers and molecular endotypes using more advanced Omics approaches to facilitate disease diagnosis and prognosis, resolve disease heterogeneity, and facilitate personalized medicine.
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Affiliation(s)
- Hong-Long Ji
- Burn and Shock Trauma Research Institute, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
- Department of Surgery, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
| | - Nan Mile S. Xi
- Department of Mathematics and Statistics at Loyola University Chicago, Chicago, IL, United States
| | - Chandra Mohan
- Biomedical Engineering & Medicine, University of Houston, Houston, TX, United States
| | - Xiting Yan
- Department of Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine Yale New Haven Hospital and Yale School of Medicine, New Haven, CT, United States
| | - Krishan G. Jain
- Burn and Shock Trauma Research Institute, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
- Department of Surgery, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
| | - Qun Sophia Zang
- Burn and Shock Trauma Research Institute, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
- Department of Surgery, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
| | - Vivian Gahtan
- Burn and Shock Trauma Research Institute, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
- Department of Surgery, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
| | - Runzhen Zhao
- Burn and Shock Trauma Research Institute, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
- Department of Surgery, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL, United States
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Lopez-Soler RI, Nikouee A, Kim M, Khan S, Sivaraman L, Ding X, Zang QS. Beclin-1 dependent autophagy improves renal outcomes following Unilateral Ureteral Obstruction (UUO) injury. Front Immunol 2023; 14:1104652. [PMID: 36875088 PMCID: PMC9978333 DOI: 10.3389/fimmu.2023.1104652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 01/31/2023] [Indexed: 02/18/2023] Open
Abstract
Background Interstitial Fibrosis and Tubular Atrophy (IFTA) is the most common cause of long-term graft failure following renal transplant. One of the hallmarks of IFTA is the development of interstitial fibrosis and loss of normal renal architecture. In this study, we evaluated the role of autophagy initiation factor Beclin-1 in protecting against post-renal injury fibrosis. Methods Adult male wild type (WT) C57BL/6 mice were subjected to Unilateral Ureteral Obstruction (UUO), and kidney tissue samples were harvested at 72-hour, 1- and 3-week post-injury. The UUO-injured and uninjured kidney samples were examined histologically for fibrosis, autophagy flux, inflammation as well activation of the Integrated Stress Response (ISR). We compared WT mice with mice carrying a forced expression of constitutively active mutant form of Beclin-1, Becn1F121A/F121A . Results In all experiments, UUO injury induces a progressive development of fibrosis and inflammation. These pathological signs were diminished in Becn1F121A/F121A mice. In WT animals, UUO caused a strong blockage of autophagy flux, indicated by continuously increases in LC3II accompanied by an over 3-fold accumulation of p62 1-week post injury. However, increases in LC3II and unaffected p62 level by UUO were observed in Becn1F121A/F121A mice, suggesting an alleviation of disrupted autophagy. Beclin-1 F121A mutation causes a significant decrease in phosphorylation of inflammatory STING signal and limited production of IL6 and IFNγ, but had little effect on TNF-α, in response to UUO. Furthermore, activation of ISR signal cascade was detected in UUO-injured in kidneys, namely the phosphorylation signals of elF2S1 and PERK in addition to the stimulated expression of ISR effector ATF4. However, Becn1F121A/F121A mice did not reveal signs of elF2S1 and PERK activation under the same condition and had a dramatically reduced ATF level at 3-week post injury. Conclusions The results suggest that UUO causes a insufficient, maladaptive renal autophagy, which triggered downstream activation of inflammatory STING pathway, production of cytokines, and pathological activation of ISR, eventually leading to the development of fibrosis. Enhancing autophagy via Beclin-1 improved renal outcomes with diminished fibrosis, via underlying mechanisms of differential regulation of inflammatory mediators and control of maladaptive ISR.
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Affiliation(s)
- Reynold I. Lopez-Soler
- Section of Renal Transplantation, Edward Hines Jr. VA Hospital, Hines, IL, United States
- Department of Surgery, Division of Intra-Abdominal Transplantation, Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
| | - Azadeh Nikouee
- Department of Surgery, Burn & Shock Trauma Research Institute; Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
| | - Matthew Kim
- Department of Surgery, Burn & Shock Trauma Research Institute; Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
| | - Saman Khan
- Department of Surgery, Burn & Shock Trauma Research Institute; Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
| | - Lakshmi Sivaraman
- Department of Biology, Loyola University Chicago, Chicago, IL, United States
| | - Xiangzhong Ding
- Department of Pathology, Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
| | - Qun Sophia Zang
- Department of Surgery, Burn & Shock Trauma Research Institute; Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
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Kim M, Nikouee A, Zou R, Ren D, He Z, Li J, Wang L, Djukovic D, Raftery D, Purcell H, Promislow D, Sun Y, Goodarzi M, Zhang QJ, Liu ZP, Zang QS. Age-Independent Cardiac Protection by Pharmacological Activation of Beclin-1 During Endotoxemia and Its Association With Energy Metabolic Reprograming in Myocardium-A Targeted Metabolomics Study. J Am Heart Assoc 2022; 11:e025310. [PMID: 35861821 PMCID: PMC9707816 DOI: 10.1161/jaha.122.025310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background We showed that Beclin-1-dependent autophagy protects the heart in young and adult mice that underwent endotoxemia. Herein, we compared the potential therapeutic effects of Beclin-1 activating peptide, TB-peptide, on endotoxemia-induced cardiac outcomes in young adult and aged mice. We further evaluated lipopolysaccharide (lipopolysaccharide)-induced and TB-peptide treatment-mediated alterations in myocardial metabolism. Methods and Results C57BL/6J mice that were 10 weeks and 24 months old were challenged by lipopolysaccharide using doses at which cardiac dysfunction occurred. Following the treatment of TB-peptide or control vehicle, heart contractility, circulating cytokines, and myocardial autophagy were evaluated. We detected that TB-peptide boosted autophagy, attenuated cytokines, and improved cardiac performance in both young and aged mice during endotoxemia. A targeted metabolomics assay was designed to detect a pool of 361 known metabolites, of which 156 were detected in at least 1 of the heart tissue samples. Lipopolysaccharide-induced impairments were found in glucose and amino acid metabolisms in mice of all ages, and TB-peptide ameliorated these alterations. However, lipid metabolites were upregulated in the young group but moderately downregulated in the aged by lipopolysaccharide, suggesting an age-dependent response. TB-peptide mitigated lipopolysaccharide-mediated trend of lipids in the young mice but had little effect on the aged. (Study registration: Project DOI: https://doi.org/10.21228/M8K11W). Conclusions Pharmacological activation of Beclin-1 by TB-peptide is cardiac protective in both young and aged population during endotoxemia, suggest a therapeutic potential for sepsis-induced cardiomyopathy. Metabolomics analysis suggests that an age-independent protection by TB-peptide is associated with reprograming of energy production via glucose and amino acid metabolisms.
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Affiliation(s)
- Matthew Kim
- Department of Surgery, Burn & Shock Trauma Research Institute Loyola University Chicago Stritch School of Medicine Maywood IL
| | - Azadeh Nikouee
- Department of Surgery, Burn & Shock Trauma Research Institute Loyola University Chicago Stritch School of Medicine Maywood IL
| | - Raymond Zou
- Department of Biological Sciences Rice University Houston TX
| | - Di Ren
- Department of Surgery University of South Florida Tampa FL
| | - Zhibin He
- Department of Surgery University of South Florida Tampa FL
| | - Ji Li
- Department of Surgery University of South Florida Tampa FL
| | - Lu Wang
- Department of Environmental and Occupational Health Sciences University of Washington Seattle WA
| | - Danijel Djukovic
- Department of Anesthesiology and Pain Medicine, Northwest Metabolomics Research Center University of Washington Seattle WA
| | - Daniel Raftery
- Department of Anesthesiology and Pain Medicine, Northwest Metabolomics Research Center University of Washington Seattle WA
| | - Hayley Purcell
- Department of Anesthesiology and Pain Medicine, Northwest Metabolomics Research Center University of Washington Seattle WA
| | - Daniel Promislow
- Department of Lab Medicine & Pathology University of Washington School of Medicine Seattle WA.,Department of Biology University of Washington School of Medicine Seattle WA
| | - Yuxiao Sun
- Department of Surgery University of Texas Southwestern Medical Center Dallas TX
| | - Mohammad Goodarzi
- Department of Immunology University of Texas Southwestern Medical Center Dallas TX
| | - Qing-Jun Zhang
- Cardiology Division, Department of Internal Medicine University of Texas Southwestern Medical Center Dallas TX
| | - Zhi-Ping Liu
- Cardiology Division, Department of Internal Medicine University of Texas Southwestern Medical Center Dallas TX
| | - Qun Sophia Zang
- Department of Surgery, Burn & Shock Trauma Research Institute Loyola University Chicago Stritch School of Medicine Maywood IL
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Kim M, Nikouee A, Sun Y, Zhang QJ, Liu ZP, Zang QS. Evaluation of Parkin in the Regulation of Myocardial Mitochondria-Associated Membranes and Cardiomyopathy During Endotoxemia. Front Cell Dev Biol 2022; 10:796061. [PMID: 35265609 PMCID: PMC8898903 DOI: 10.3389/fcell.2022.796061] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 01/14/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Mitochondrial deficiency is a known pathology in sepsis-induced organ failure. We previously found that mitochondria-associated membranes (MAMs), a subcellular domain supporting mitochondrial status, are impaired in the heart during endotoxemia, suggesting a mechanism of mitochondrial damage occurred in sepsis. Mitophagy pathway via E3 ubiquitin ligase Parkin and PTEN-induced kinase 1 (PINK1) controls mitochondrial quality. Studies described here examined the impact of Parkin on cardiac MAMs and endotoxemia-induced cardiomyopathy. Additionally, point mutation W403A in Parkin was previously identified as a constitutively active mutation in vitro. In vivo effects of forced expression of this mutation were evaluated in the endotoxemia model. Methods: Mice of wild type (WT), Parkin-deficiency (Park2−/−), and knock-in expression of Parkin W402A (human Parkin W403A) were given lipopolysaccharide (LPS) challenge. Cardiac function was evaluated by echocardiography. In the harvested heart tissue, MAM fractions were isolated by ultracentrifugation, and their amount and function were quantified. Ultrastructure of MAMs and mitochondria was examined by electron microscopy. Mitochondrial respiratory activities were measured by enzyme assays. Myocardial inflammation was estimated by levels of pro-inflammatory cytokine IL-6. Myocardial mitophagy was assessed by levels of mitophagy factors associated with mitochondria and degrees of mitochondria-lysosome co-localization. Parkin activation, signified by phosphorylation on serine 65 of Parkin, was also evaluated. Results: Compared with WT, Park2−/− mice showed more severely impaired cardiac MAMs during endotoxemia, characterized by disrupted structure, reduced quantity, and weakened transporting function. Endotoxemia-induced cardiomyopathy was intensified in Park2−/− mice, shown by worsened cardiac contractility and higher production of IL-6. Mitochondria from the Park2−/− hearts were more deteriorated, indicated by losses in both structural integrity and respiration function. Unexpectedly, mice carrying Parkin W402A showed similar levels of cardiomyopathy and mitochondrial damage when compared with their WT counterparts. Further, Parkin W402A mutation neither enhanced mitophagy nor increased Parkin activation in myocardium under the challenge of endotoxemia. Conclusion: our results suggest that Parkin/PINK1 mitophagy participates in the regulation of cardiac MAMs during endotoxemia. Point mutation W402A (human W403A) in Parkin is not sufficient to alleviate cardiomyopathy induced by endotoxemia in vivo.
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Affiliation(s)
- Matthew Kim
- Department of Surgery, Burn & Shock Trauma Research Institute, Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
| | - Azadeh Nikouee
- Department of Surgery, Burn & Shock Trauma Research Institute, Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
| | - Yuxiao Sun
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Qing-Jun Zhang
- Internal Medicine-Cardiology Division, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Zhi-Ping Liu
- Internal Medicine-Cardiology Division, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Qun Sophia Zang
- Department of Surgery, Burn & Shock Trauma Research Institute, Loyola University Chicago Stritch School of Medicine, Maywood, IL, United States
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