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Arikawa LM, Mota LFM, Schmidt PI, Frezarim GB, Fonseca LFS, Magalhães AFB, Silva DA, Carvalheiro R, Chardulo LAL, Albuquerque LGD. Genome-wide scans identify biological and metabolic pathways regulating carcass and meat quality traits in beef cattle. Meat Sci 2024; 209:109402. [PMID: 38056170 DOI: 10.1016/j.meatsci.2023.109402] [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: 04/25/2023] [Revised: 10/19/2023] [Accepted: 11/28/2023] [Indexed: 12/08/2023]
Abstract
Genome association studies (GWAS) provides knowledge about the genetic architecture of beef-related traits that allow linking the target phenotype to genomic information aiding breeding decision. Thus, the present study aims to uncover the genetic mechanism involved in carcass (REA: rib eye area, BF: backfat thickness, and HCW: hot carcass weight) and meat quality traits (SF: shear-force, MARB: marbling score, and IMF: intramuscular fat content) in Nellore cattle. For this, 6910 young bulls with phenotypic information and 23,859 animals genotyped with 435 k markers were used to perform the weighted single-step GBLUP (WssGBLUP) approach, considering two iterations. The top 10 genomic regions explained 8.13, 11.81, and 9.58% of the additive genetic variance, harboring a total of 119, 143, and 95 positional candidate genes for REA, BF, and HCW, respectively. For meat quality traits, the top 10 windows explained a large proportion of the total genetic variance for SF (14.95%), MARB (17.56%), and IMF (21.41%) surrounding 92, 155, and 111 candidate genes, respectively. Relevant candidate genes (CAST, PLAG1, XKR4, PLAGL2, AQP3/AQP7, MYLK2, WWOX, CARTPT, and PLA2G16) are related to physiological aspects affecting growth, carcass, meat quality, feed intake, and reproductive traits by signaling pathways controlling muscle control, key signal metabolic molecules INS / IGF-1 pathway, lipid metabolism, and adipose tissue development. The GWAS results provided insights into the genetic control of the traits studied and the genes found are potential candidates to be used in the improvement of carcass and meat quality traits.
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Affiliation(s)
- Leonardo Machestropa Arikawa
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil.
| | - Lucio Flavio Macedo Mota
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil
| | - Patrícia Iana Schmidt
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil
| | - Gabriela Bonfá Frezarim
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil
| | - Larissa Fernanda Simielli Fonseca
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil
| | - Ana Fabrícia Braga Magalhães
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil; University of Jequitinhonha and Mucuri Valleys, Department of Animal Science, Rod. MG 367, Diamantina, MG 39100-000, Brazil
| | - Delvan Alves Silva
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil; University of Viçosa, Department of Animal Science, Av. PH Rolfs, Viçosa, MG 36570-900, Brazil
| | - Roberto Carvalheiro
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil
| | - Luis Artur Loyola Chardulo
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil; National Council for Science and Technological Development, Brasilia, DF 71605-001, Brazil
| | - Lucia Galvão de Albuquerque
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Department of Animal Science, Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, SP 14884-900, Brazil; National Council for Science and Technological Development, Brasilia, DF 71605-001, Brazil.
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Phelan DE, Reddan B, Shigemura M, Sznajder JI, Crean D, Cummins EP. Orphan Nuclear Receptor Family 4A (NR4A) Members NR4A2 and NR4A3 Selectively Modulate Elements of the Monocyte Response to Buffered Hypercapnia. Int J Mol Sci 2024; 25:2852. [PMID: 38474099 PMCID: PMC10931687 DOI: 10.3390/ijms25052852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/19/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024] Open
Abstract
Hypercapnia occurs when the partial pressure of carbon dioxide (CO2) in the blood exceeds 45 mmHg. Hypercapnia is associated with several lung pathologies and is transcriptionally linked to suppression of immune and inflammatory signalling through poorly understood mechanisms. Here we propose Orphan Nuclear Receptor Family 4A (NR4A) family members NR4A2 and NR4A3 as potential transcriptional regulators of the cellular response to hypercapnia in monocytes. Using a THP-1 monocyte model, we investigated the sensitivity of NR4A family members to CO2 and the impact of depleting NR4A2 and NR4A3 on the monocyte response to buffered hypercapnia (10% CO2) using RNA-sequencing. We observed that NR4A2 and NR4A3 are CO2-sensitive transcription factors and that depletion of NR4A2 and NR4A3 led to reduced CO2-sensitivity of mitochondrial and heat shock protein (Hsp)-related genes, respectively. Several CO2-sensitive genes were, however, refractory to depletion of NR4A2 and NR4A3, indicating that NR4As regulate certain elements of the cellular response to buffered hypercapnia but that other transcription factors also contribute. Bioinformatic analysis of conserved CO2-sensitive genes implicated several novel putative CO2-sensitive transcription factors, of which the ETS Proto-Oncogene 1 Transcription Factor (ETS-1) was validated to show increased nuclear expression in buffered hypercapnia. These data give significant insights into the understanding of immune responses in patients experiencing hypercapnia.
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Affiliation(s)
- David E. Phelan
- School of Medicine, University College Dublin, Dublin 4, Ireland (B.R.)
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin 4, Ireland
| | - Ben Reddan
- School of Medicine, University College Dublin, Dublin 4, Ireland (B.R.)
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin 4, Ireland
| | - Masahiko Shigemura
- Division of Thoracic Surgery, Northwestern University, Chicago, IL 60611, USA;
| | - Jacob I. Sznajder
- Pulmonary and Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Daniel Crean
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin 4, Ireland
- School of Veterinary Medicine, University College Dublin, Dublin 4, Ireland
| | - Eoin P. Cummins
- School of Medicine, University College Dublin, Dublin 4, Ireland (B.R.)
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin 4, Ireland
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Phelan DE, Mota C, Strowitzki MJ, Shigemura M, Sznajder JI, Crowe L, Masterson JC, Hayes SE, Reddan B, Yin X, Brennan L, Crean D, Cummins EP. Hypercapnia alters mitochondrial gene expression and acylcarnitine production in monocytes. Immunol Cell Biol 2023; 101:556-577. [PMID: 36967673 PMCID: PMC10330468 DOI: 10.1111/imcb.12642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 03/03/2023] [Accepted: 03/25/2023] [Indexed: 03/29/2023]
Abstract
CO2 is produced during aerobic respiration. Normally, levels of CO2 in the blood are tightly regulated but pCO2 can rise (hypercapnia, pCO2 > 45 mmHg) in patients with lung diseases, for example, chronic obstructive pulmonary disease (COPD). Hypercapnia is a risk factor in COPD but may be of benefit in the context of destructive inflammation. The effects of CO2 per se, on transcription, independent of pH change are poorly understood and warrant further investigation. Here we elucidate the influence of hypercapnia on monocytes and macrophages through integration of state-of-the-art RNA-sequencing, metabolic and metabolomic approaches. THP-1 monocytes and interleukin 4-polarized primary murine macrophages were exposed to 5% CO2 versus 10% CO2 for up to 24 h in pH-buffered conditions. In hypercapnia, we identified around 370 differentially expressed genes (DEGs) under basal and about 1889 DEGs under lipopolysaccharide-stimulated conditions in monocytes. Transcripts relating to both mitochondrial and nuclear-encoded gene expression were enhanced in hypercapnia in basal and lipopolysaccharide-stimulated cells. Mitochondrial DNA content was not enhanced, but acylcarnitine species and genes associated with fatty acid metabolism were increased in hypercapnia. Primary macrophages exposed to hypercapnia also increased activation of genes associated with fatty acid metabolism and reduced activation of genes associated with glycolysis. Thus, hypercapnia elicits metabolic shifts in lipid metabolism in monocytes and macrophages under pH-buffered conditions. These data indicate that CO2 is an important modulator of monocyte transcription that can influence immunometabolic signaling in immune cells in hypercapnia. These immunometabolic insights may be of benefit in the treatment of patients experiencing hypercapnia.
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Affiliation(s)
- David E Phelan
- School of Medicine, University College Dublin, Dublin, Ireland
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Catarina Mota
- School of Medicine, University College Dublin, Dublin, Ireland
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Moritz J Strowitzki
- School of Medicine, University College Dublin, Dublin, Ireland
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Masahiko Shigemura
- Division of Pulmonary and Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Jacob I Sznajder
- Division of Pulmonary and Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Louise Crowe
- Allergy, Inflammation & Remodeling Research Laboratory, Kathleen Lonsdale Institute for Human Health Research, Department of Biology, Maynooth University, Maynooth, County Kildare, Ireland
| | - Joanne C Masterson
- Allergy, Inflammation & Remodeling Research Laboratory, Kathleen Lonsdale Institute for Human Health Research, Department of Biology, Maynooth University, Maynooth, County Kildare, Ireland
| | - Sophie E Hayes
- School of Medicine, University College Dublin, Dublin, Ireland
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Ben Reddan
- School of Medicine, University College Dublin, Dublin, Ireland
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Xiaofei Yin
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland
| | - Lorraine Brennan
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland
| | - Daniel Crean
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
- School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Eoin P Cummins
- School of Medicine, University College Dublin, Dublin, Ireland
- Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
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Ma X, Zhang X, Leng T, Ma J, Yuan Z, Gu Y, Hu T, Liu Q, Shen T. Identification of Oxidative Stress-Related Biomarkers in Diabetic Kidney Disease. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2022; 2022:1067504. [PMID: 36624863 PMCID: PMC9825216 DOI: 10.1155/2022/1067504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 12/04/2022] [Accepted: 12/06/2022] [Indexed: 01/02/2023]
Abstract
BACKGROUND Diabetic kidney disease (DKD) is a leading cause of end-stage renal disease throughout the world. In kidney disease, oxidative stress has been linked to both antioxidant depletions and increased reactive oxygen species (ROS) production. Thus, the objective of this study was to identify biomarkers related to oxidative stress in DKD. METHODS The gene expression profile of the DKD was extracted from the Gene Expression Omnibus (GEO) database. The identification of the differentially expressed genes (DEGs) was performed using the "limma" R package, and weighted gene coexpression network analysis (WGCNA) was used to find the gene modules that were most related to DKD. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis was performed using "Org.Hs.eg.db" R package. The protein-protein interaction (PPI) network was constructed using the STRING database. The hub genes were identified by the Molecular Complex Detection (MCODE) plug-in of Cytoscape software. The diagnostic capacity of hub genes was verified using the receiver operating characteristic (ROC) curve. Correlations between diagnostic genes were analyzed using the "corrplot" package. In addition, the miRNA gene transcription factor (TF) network was used to explain the regulatory mechanism of hub genes in DKD. RESULTS DEGs analysis and WGCNA-identified 160 key genes were identified in DKD patients. Among them, nine oxidative stress-related genes were identified as candidate hub genes for DKD. Using the PPI network, five hub genes, NR4A2, DUSP1, FOS, JUN, and PTGS2, were subsequently identified. All the hub genes were downregulated in DKD and had a high diagnostic value of DKD. The regulatory mechanism of hub genes was analyzed from the miRNA gene-TF network. CONCLUSION Our study identified NR4A2, DUSP1, FOS, JUN, and PTGS2 as hub genes of DKD. These genes may serve as potential therapeutic targets for DKD patients.
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Affiliation(s)
- Xiaoju Ma
- School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Xiaobo Zhang
- School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Tian Leng
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Jingru Ma
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Zhongzhu Yuan
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Yalin Gu
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Tingting Hu
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Qiuyan Liu
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Tao Shen
- School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
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Wang H, Shao J, Lu X, Jiang M, Li X, Liu Z, Zhao Y, Zhou J, Lin L, Wang L, Xu Q, Chen Y, Zhang R. Potential of immune-related genes as promising biomarkers for premature coronary heart disease through high throughput sequencing and integrated bioinformatics analysis. Front Cardiovasc Med 2022; 9:893502. [PMID: 36093144 PMCID: PMC9458892 DOI: 10.3389/fcvm.2022.893502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 07/06/2022] [Indexed: 11/13/2022] Open
Abstract
Background Coronary heart disease (CHD) is the most common progressive disease that is difficult to diagnose and predict in the young asymptomatic period. Our study explored a mechanistic understanding of the genetic effects of premature CHD (PCHD) and provided potential biomarkers and treatment targets for further research through high throughput sequencing and integrated bioinformatics analysis. Methods High throughput sequencing was performed among recruited patients with PCHD and young healthy individuals, and CHD-related microarray datasets were obtained from the Gene Expression Omnibus (GEO) database. Differentially expressed genes (DEGs) were identified by using R software. Enrichment analysis and CIBERSORT were performed to explore the enriched pathways of DEGs and the characteristics of infiltrating immune cells. Hub genes identified by protein–protein interaction (PPI) networks were used to construct the competitive endogenous RNA (ceRNA) networks. Potential drugs were predicted by using the Drug Gene Interaction Database (DGIdb). Results A total of 35 DEGs were identified from the sequencing dataset and GEO database by the Venn Diagram. Enrichment analysis indicated that DEGs are mostly enriched in excessive immune activation pathways and signal transduction. CIBERSORT exhibited that resting memory CD4 T cells and neutrophils were more abundant, and M2 macrophages, CD8 T cells, and naïve CD4 T cells were relatively scarce in patients with PCHD. After the identification of 10 hub gens, three ceRNA networks of CD83, CXCL8, and NR4A2 were constructed by data retrieval and validation. In addition, CXCL8 might interact most with multiple chemical compounds mainly consisting of anti-inflammatory drugs. Conclusions The immune dysfunction mainly contributes to the pathogenesis of PCHD, and three ceRNA networks of CD83, CXCL8, and NR4A2 may be potential candidate biomarkers for early diagnosis and treatment targets of PCHD.
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Affiliation(s)
- Haiming Wang
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Junjie Shao
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Xuechun Lu
- Department of Hematology, The Second Medical Center of Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Min Jiang
- Department of Respiratory and Critical Care, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Xin Li
- Department of Health Services, The First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Zifan Liu
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Yunzhang Zhao
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Jingjing Zhou
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Lejian Lin
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Lin Wang
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Qiang Xu
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
| | - Yundai Chen
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
- Yundai Chen
| | - Ran Zhang
- Department of Cardiovascular Medicine, Chinese PLA General Hospital and Chinese People's Liberation Army (PLA) Medical School, Beijing, China
- *Correspondence: Ran Zhang
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Murphy EP, Crean D. NR4A1-3 nuclear receptor activity and immune cell dysregulation in rheumatic diseases. Front Med (Lausanne) 2022; 9:874182. [PMID: 35935773 PMCID: PMC9354819 DOI: 10.3389/fmed.2022.874182] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 07/05/2022] [Indexed: 11/24/2022] Open
Abstract
The development and progression of immune-mediated rheumatic disease (IMRD) involves dysfunction of innate and adaptive immune cell populations leading to altered responses including inflammasome activation, dysregulated cytokine networks, increased immune cell numbers and multifaceted cell-cell communication. Several rheumatic diseases are further characterized by the presence of autoantibodies, immune complex mediated complement activation and the deficit of peripheral immune tolerance due to reduced regulatory T-lymphocyte cell function. Ultimately, in rheumatic disease the loss in cellular and tissue homeostasis culminates in the advancement of chronic inflammation. The three members of the NR4A subfamily of nuclear receptors are immediate early genes, and act as potent transcriptional responders to changes in the cellular and tissue microenvironment. Subfamily members are rapidly expressed in diseases characterized by inflammation and function to control the differentiation and activity of innate and adaptive immune cells in a cell-type and cell-context specific manner. Rheumatic disease including rheumatoid-, psoriatic-, osteo-arthritis and systemic sclerosis display altered NR4A1-3 activity in controlling immune cell migration and function, production of paracrine signaling molecules, synovial tissue hyperplasia, and regulating cartilage turn-over in vivo. Additionally, NR4A1-3 activities mediate cytokine, prostanoid and growth factor signaling to control angiogenesis, modulate the regulatory functions of mesenchymal stromal cells, alter the activation status of dendritic cells, influence the generation of peripheral myeloid and T-lymphocyte lineages and promote the maintenance of functional regulatory T-cells. Further reports uncover the potential of moderating NR4A 1-3 receptors as therapeutic targets in altering immune tolerance, pathological angiogenesis and controlling inflammation in several models of disease.
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Affiliation(s)
| | - Daniel Crean
- School of Veterinary Medicine, University College Dublin, Dublin, Ireland
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Li Q, Li Y, Huang W, Wang X, Liu Z, Chen J, Fan Y, Peng T, Sadayappan S, Wang Y, Fan GC. Loss of Lipocalin 10 Exacerbates Diabetes-Induced Cardiomyopathy via Disruption of Nr4a1-Mediated Anti-Inflammatory Response in Macrophages. Front Immunol 2022; 13:930397. [PMID: 35757735 PMCID: PMC9226549 DOI: 10.3389/fimmu.2022.930397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 05/11/2022] [Indexed: 11/13/2022] Open
Abstract
Metabolic disorders (i.e., hyperglycemia, hyperlipidemia, and hyperinsulinemia) cause increased secretion of inflammatory cytokines/chemokines, leading to gradual loss of cardiac resident macrophage population and increased accumulation of inflammatory monocytes/macrophages in the heart. Such self-perpetuating effect may contribute to the development of cardiomyopathy during diabetes. Recent meta-analysis data reveal that lipocalin 10 (Lcn10) is significantly downregulated in cardiac tissue of patients with heart failure but is increased in the blood of septic patients. However, the functional role of Lcn10 in cardiac inflammation triggered by metabolic disorders has never been investigated. In this study, we demonstrate that the expression of Lcn10 in macrophages was significantly decreased under multiple metabolic stress conditions. Furthermore, Lcn10-null macrophages exhibited pro-inflammatory phenotype in response to inflammation stimuli. Next, using a global Lcn10-knockout (KO) mouse model to induce type-2 diabetes (T2D), we observed that loss of Lcn10 promoted more pro-inflammatory macrophage infiltration into the heart, compared to controls, leading to aggravated insulin resistance and impaired cardiac function. Similarly, adoptive transfer of Lcn10-KO bone marrow cells into X-ray irradiated mice displayed higher ratio of pro-/anti-inflammatory macrophages in the heart and worsened cardiac function than those mice received wild-type (WT) bone marrows upon T2D conditions. Mechanistically, RNA-sequencing analysis showed that Nr4a1, a nuclear receptor known to have potent anti-inflammatory effects, is involved in Lcn10-mediated macrophage activation. Indeed, we found that nuclear translocation of Nr4a1 was disrupted in Lcn10-KO macrophages upon stimulation with LPS + IFNγ. Accordingly, treatment with Cytosporone B (CsnB), an agonist of Nr4a1, attenuated the pro-inflammatory response in Lcn10-null macrophages and partially improved cardiac function in Lcn10-KO diabetic mice. Together, these findings indicate that loss of Lcn10 skews macrophage polarization to pro-inflammatory phenotype and aggravates cardiac dysfunction during type-2 diabetes through the disruption of Nr4a1-mediated anti-inflammatory signaling pathway in macrophages. Therefore, reduction of Lcn10 expression observed in diabetic macrophages may be responsible for the pathogenesis of diabetes-induced cardiac dysfunction. It suggests that Lcn10 might be a potential therapeutic factor for diabetic heart failure.
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Affiliation(s)
- Qianqian Li
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, United States
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Yutian Li
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Wei Huang
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Xiaohong Wang
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Zhenling Liu
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Jing Chen
- Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Yanbo Fan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Tianqing Peng
- The Centre for Critical Illness Research, Lawson Health Research Institute, London, ON, Canada
| | - Sakthivel Sadayappan
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Yigang Wang
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Guo-Chang Fan
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
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