1
|
Wang H, Wang H, Chen J, Liu P, Xiao X. Overexpressed FAM111B degrades GSDMA to promote esophageal cancer tumorigenesis and cisplatin resistance. Cell Oncol (Dordr) 2024; 47:343-359. [PMID: 37672204 DOI: 10.1007/s13402-023-00871-0] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2023] [Indexed: 09/07/2023] Open
Abstract
BACKGROUND Chemotherapeutic agents such as cisplatin are commonly used in patients with clinically unresectable or recurrent esophageal cancer (ESCA). However, patients often develop resistance to cisplatin, which in turn leads to a poor prognosis. Studies have shown that FAM111B may be involved in the development of tumors as an oncogene or tumor suppressor gene. However, the pathological role and corresponding mechanism of FAM111B in ESCA are still unclear. METHODS The GEPIA web tool, ENCORI Pan-Cancer Analysis Platform and UALCAN-TCGA database were used to study the expression of FAM111B in ESCA. CCK-8, angiogenesis, Transwell and xenograft assays were applied to explore the biological function of FAM111B in ESCA. Western blot, RT-qPCR, and RNA-seq analyses were applied to study the FAM111B/GSDMA axis in the progression of ESCA cells. CCK-8 and xenograft assays were used to study the role of the FAM111B/GSDMA axis in determining the sensitivity of ESCA to cisplatin. RESULTS Our results demonstrated that FAM111B is highly expressed in ESCA tissues compared to normal tissues. We showed that FAM111B promotes the progression of ESCC cells by binding to GSDMA and that the trypsin protease domain is essential for the activity of FAM111B. Furthermore, we showed that the FAM111B/GSDMA axis regulates cisplatin sensitivity in ESCA. CONCLUSIONS Overall, we identified a novel FAM111B/GSDMA axis regulating ESCA tumorigenesis and chemosensitivity, at least in ESCC cells.
Collapse
Affiliation(s)
- Haiqin Wang
- Department of Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- Hunan Clinical Medical Research Center for Geriatric Syndrome, Changsha, Hunan, China
| | - Haohui Wang
- Department of Thoracic Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Early Diagnosis and Precise Treatment of Lung Cancer, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Jiajing Chen
- Department of Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- Hunan Clinical Medical Research Center for Geriatric Syndrome, Changsha, Hunan, China
| | - Pian Liu
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Cancer Center, Wuhan, Hubei, China.
- Institute of Radiation Oncology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
| | - Xiaoxiong Xiao
- Department of Thoracic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- Xiangya Lung Cancer Center, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China.
| |
Collapse
|
2
|
Liu Q, Li M, Sun M, Xin R, Wang Y, Chen Q, Gao X, Lin Z. Depletion of Gsdma1/2/3 alleviates PMA-induced epidermal hyperplasia by inhibiting the EGFR-Stat3/Akt pathway. J Mol Cell Biol 2023:mjad080. [PMID: 38115633 DOI: 10.1093/jmcb/mjad080] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023] Open
Abstract
Homeostasis of the skin barrier is essential for maintaining normal skin function. Gasdermin A (GSDMA) is highly expressed in the skin and is associated with many skin diseases, such as melanoma and psoriasis. In mice, GSDMA is encoded by three gene homologues, namely Gsdma1, Gsdma2, and Gsdma3. Although Gsdma3 gain-of-function mutations cause hair loss and skin inflammation, Gsdma3-deficient mice show no phenotypes in skin or hair structures. To explore the physiological function of GSDMA, we generated conventional Gsdma1/2/3 knockout (KO) mice. We found that Gsdma1/2/3 KO mice showed significantly decreased epidermal hyperplasia and inflammation induced by phorbol 12-myristate 13-acetate (PMA). Furthermore, we found that the alleviation of epidermal hyperplasia depends on Gsdma1/2/3 expressed specifically in keratinocytes. Mechanistically, Gsdma1/2/3 depletion downregulated epidermal growth factor receptor (EGFR) ligands, leading to decreased EGFR-Stat3/Akt signalling. These results demonstrate that depletion of Gsdma1/2/3 alleviates PMA-induced epidermal hyperplasia partially by inhibiting the EGFR-Stat3/Akt pathway.
Collapse
Affiliation(s)
- Qiyao Liu
- MOE Key Laboratory of Model Animals for Disease Study, State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Model Animal Research Center, National Resource Center for Mutant Mice of China, Nanjing Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing 210061, China
| | - Manyun Li
- MOE Key Laboratory of Model Animals for Disease Study, State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Model Animal Research Center, National Resource Center for Mutant Mice of China, Nanjing Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing 210061, China
| | - Minli Sun
- MOE Key Laboratory of Model Animals for Disease Study, State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Model Animal Research Center, National Resource Center for Mutant Mice of China, Nanjing Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing 210061, China
| | - Ruyue Xin
- MOE Key Laboratory of Model Animals for Disease Study, State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Model Animal Research Center, National Resource Center for Mutant Mice of China, Nanjing Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing 210061, China
| | - Yushu Wang
- MOE Key Laboratory of Model Animals for Disease Study, State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Model Animal Research Center, National Resource Center for Mutant Mice of China, Nanjing Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing 210061, China
| | - Qin Chen
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200240, China
| | - Xiang Gao
- MOE Key Laboratory of Model Animals for Disease Study, State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Model Animal Research Center, National Resource Center for Mutant Mice of China, Nanjing Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing 210061, China
| | - Zhaoyu Lin
- MOE Key Laboratory of Model Animals for Disease Study, State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Model Animal Research Center, National Resource Center for Mutant Mice of China, Nanjing Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing 210061, China
| |
Collapse
|
3
|
Zhang R, Song Q, Lin X, Du B, Geng D, Gao D. GSDMA at the crossroads between pyroptosis and tumor immune evasion in glioma. Biochem Biophys Res Commun 2023; 686:149181. [PMID: 37924669 DOI: 10.1016/j.bbrc.2023.149181] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/18/2023] [Accepted: 10/27/2023] [Indexed: 11/06/2023]
Abstract
Pyroptosis, an inflammatory and programmed cell death process, has been controversial in its role in tumor immunity. However, as the first molecule in the gasdermin family, the mechanism of GSDMA in glioma growth is not well understood. We identified the differentially expressed gene GSDMA from Treg cells-related genes using the TCGA database. The biological functions of GSDMA and the relationship between GSDMA expression and tumor immune cell infiltration and cancer patient survival were investigated using open-source databases and platforms. Additionally, flow cytometry analysis was used to examine the effect of GSDMA on tumor immune cell infiltration. Our study showed that GSDMA expression played an important role in immune evasion in glioma. Patients with high GSDMA expression had a worse prognosis. In vivo studies demonstrated that GSDMA knockdown could enhance the infiltration level of CD8+ T cells. High GSDMA expression was also positively correlated with poor anti-PD-L1 treatment outcomes in GBM patients, suggesting that GSDMA may be a potential biomarker that should be considered in combination with anti-PD-L1 therapy for glioma patients. In conclusion, our study demonstrates that high GSDMA expression in gliomas is associated with immune-infiltrating cells CD8+ T cells and Treg cells, and indicates a worse prognosis in glioma. Therefore, GSDMA may serve as a therapeutic target for glioma progression and should be applied in immunotherapy for glioma patients.
Collapse
Affiliation(s)
- Ruicheng Zhang
- Nanjing Medical University, Nanjing, China; Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Qiuya Song
- Department of Pathology, Xuzhou Medical University, Xuzhou, China
| | - Xiaoqian Lin
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Bo Du
- Nanjing Medical University, Nanjing, China; Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Deqin Geng
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China.
| | - Dianshuai Gao
- Nanjing Medical University, Nanjing, China; Department of Human Anatomy and Neurobiology, Xuzhou Medical University, Xuzhou, China.
| |
Collapse
|
4
|
Eckhart L, Chen R. Editorial: Gasdermins in the defense against pathogens. Front Immunol 2023; 14:1238368. [PMID: 37409112 PMCID: PMC10319151 DOI: 10.3389/fimmu.2023.1238368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 06/12/2023] [Indexed: 07/07/2023] Open
Affiliation(s)
- Leopold Eckhart
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Ruochan Chen
- Hunan Provincial Key Laboratory of Viral Hepatitis, Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
5
|
Kondolf HC, D'Orlando DA, Dubyak GR, Abbott DW. Protein engineering reveals that gasdermin A preferentially targets mitochondrial membranes over the plasma membrane during pyroptosis. J Biol Chem 2023; 299:102908. [PMID: 36642180 DOI: 10.1016/j.jbc.2023.102908] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
When activated, gasdermin family members are thought to be pore-forming proteins that cause lytic cell death. Despite this, numerous studies have suggested that the threshold for lytic cell death is dependent on which gasdermin family member is activated. Determination of the propensity of various gasdermin family members to cause pyroptosis has been handicapped by the fact that for many of them, the mechanisms and timing of their activation are uncertain. In this article, we exploit the recently discovered exosite-mediated recognition of gasdermin D (GSDMD) by the inflammatory caspases to develop a system that activates gasdermin family members in an efficient and equivalent manner. We leverage this system to show that upon activation, GSDMD and gasdermin A (GSDMA) exhibit differential subcellular localization, differential plasma membrane permeabilization, and differential lytic cell death. While GSDMD localizes rapidly to both the plasma membrane and organelle membranes, GSDMA preferentially localizes to the mitochondria with delayed and diminished accumulation at the plasma membrane. As a consequence of this differential kinetics of subcellular localization, N-terminal GSDMA results in early mitochondrial dysfunction relative to plasma membrane permeabilization. This study thus challenges the assumption that gasdermin family members effect cell death through identical mechanisms and establishes that their activation in their respective tissues of expression likely results in different immunological outcomes.
Collapse
|
6
|
Fu L, Zhang J, Lin Z, Li Y, Qin G. CircularRNA circ_0071269 knockdown protects against from diabetic cardiomyopathy injury by microRNA-145/gasdermin A axis. Bioengineered 2022; 13:2398-2411. [PMID: 35034587 PMCID: PMC8974193 DOI: 10.1080/21655979.2021.2024688] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 12/16/2022] Open
Abstract
Circular RNAs (circRNAs) are involved in the development and progression of diabetic cardiomyopathy (DCM). However, the specific function and underlying mechanism of circ_0071269 in DCM remains unclear. In our study, mRNA and miRNA expression was detected by real-time quantitative PCR (qRT-PCR). RNase R and actinomycin D treatment were applied to test the characteristics of circ_0071269. Cell Counting Kit-8 (CCK-8) assay, lactate dehydrogenase (LDH) and enzyme-linked immunosorbent assay (ELISA) kits were performed to determine the cell viability, cell LDH content and interleukin (IL)-1β and IL-18 levels, respectively. Cell death rate was determined by Flow cytometry, and Western blotting was for the protein expression levels. In addition, luciferase reporter and RNA pull-down assays were performed to confirm the binding relationship between miR-145 and circ_0071269 or gasdermin A (GSDMA). Echocardiography, Hematoxylin and Eosin (HE) Staining, and Immunohistochemical (IHC) Staining were performed to evaluate myocardial damage in vivo. We found that circ_0071269 was significantly overexpressed in H9c2 cells upon treatment with high glucose. Knockdown of circ_0071269 promoted cell viability and inhibited the inflammatory response, cytotoxicity, and pyroptosis of H9c2 cells in vitro. Moreover, circ_0071269 sponges miR-145 to upregulate GSDMA. A miR-145 inhibitor antagonized the effects of circ_0071269 knockdown on the cellular functions of H9c2 cells, while the effects of miR-145 were abrogated by the overexpression of GSDMA. Meanwhile, knockdown of circ_0071269 attenuated cardiac dysfunction of DM mice. Hence, circ_0071269 may promote the development of DCM through the miR-145/GSDMA axis and thus provide a novel marker for the treatment of DCM.
Collapse
Affiliation(s)
- Lanfang Fu
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou City, China
- Department of Endocrinology, Haikou Hospital, Affiliated to Xiangya Medical College, Central South University, Haikou, China
| | - Juyun Zhang
- Department of Endocrinology, Haikou Hospital, Affiliated to Xiangya Medical College, Central South University, Haikou, China
| | - Zhu Lin
- Department of Endocrinology, Haikou Hospital, Affiliated to Xiangya Medical College, Central South University, Haikou, China
| | - Yi Li
- Department of Clinical Medicine, Hainan Medical College, Haikou, China
| | - Guijun Qin
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou City, China
| |
Collapse
|
7
|
Li X, Christenson SA, Modena B, Li H, Busse WW, Castro M, Denlinger LC, Erzurum SC, Fahy JV, Gaston B, Hastie AT, Israel E, Jarjour NN, Levy BD, Moore WC, Woodruff PG, Kaminski N, Wenzel SE, Bleecker ER, Meyers DA; NHLBI Severe Asthma Research Program (SARP). Genetic analyses identify GSDMB associated with asthma severity, exacerbations, and antiviral pathways. J Allergy Clin Immunol 2021; 147:894-909. [PMID: 32795586 DOI: 10.1016/j.jaci.2020.07.030] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 07/16/2020] [Accepted: 07/24/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND The Chr17q12-21.2 region is the strongest and most consistently associated region with asthma susceptibility. The functional genes or single nucleotide polymorphisms (SNPs) are not obvious due to linkage disequilibrium. OBJECTIVES We sought to comprehensively investigate whole-genome sequence and RNA sequence from human bronchial epithelial cells to dissect functional genes/SNPs for asthma severity in the Severe Asthma Research Program. METHODS Expression quantitative trait loci analysis (n = 114), correlation analysis (n = 156) of gene expression and asthma phenotypes, and pathway analysis were performed in bronchial epithelial cells and replicated. Genetic association for asthma severity (426 severe vs 531 nonsevere asthma) and longitudinal asthma exacerbations (n = 273) was performed. RESULTS Multiple SNPs in gasdermin B (GSDMB) associated with asthma severity (odds ratio, >1.25) and longitudinal asthma exacerbations (P < .05). Expression quantitative trait loci analyses identified multiple SNPs associated with expression levels of post-GPI attachment to proteins 3, GSDMB, or gasdermin A (3.1 × 10-9 <P < 1.8 × 10-4). Higher expression levels of GSDMB correlated with asthma and greater number of exacerbations (P < .05). Expression levels of GSDMB correlated with genes involved in IFN signaling, MHC class I antigen presentation, and immune system pathways (false-discovery rate-adjusted P < .05). rs1031458 and rs3902920 in GSDMB colocalized with IFN regulatory factor binding sites and associated with GSDMB expression, asthma severity, and asthma exacerbations (P < .05). CONCLUSIONS By using a unique set of gene expression data from lung cells obtained using bronchoscopy from comprehensively characterized subjects with asthma, we show that SNPs in GSDMB associated with asthma severity, exacerbations, and GSDMB expression levels. Furthermore, its expression levels correlated with asthma exacerbations and antiviral pathways. Thus, GSDMB is a functional gene for both asthma susceptibility and severity.
Collapse
|
8
|
Na W, Rui-Rui Y, Ming-Kai C, Bin Z, Qing-Li B, Feng-Yun D, Feng-Rong L, Hai-Xin D, Hai-Hua W, Guang-Tao L, Cheng-Qiang J, Yan-Xia J. Establishment of a fluorescent PCR melting curve method for detecting asthma susceptibility using gene SNP typing. J Asthma 2019; 57:850-857. [PMID: 31082286 DOI: 10.1080/02770903.2019.1619084] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Objective: To develop a detection method for single nucleotide polymorphisms (SNPs) of bronchial asthma (BA) susceptibility genes (IL-13, IL-33, and GSDMA) based on fluorescence PCR melting curves.Methods: Peripheral blood samples from 33 patients with BA were collected. DNA was extracted, and positive plasmids were constructed. Probes and primers for fluorescence polymerase chain reaction (PCR) were designed according to IL-13, IL-33, and GSDMA sequences, and the SNPs were separately detected by gene sequencing and fluorescence PCR melting curve.Results: The system was successfully divided into 3 SNPs, including IL-13, IL-33, and GSDMA, and a comparison of sequencing methods showed that the results were completely consistent. The lowest detection limit was 1 ng/reaction, the sensitivity and specificity were 100%, and this method had high repeatability (CV = 2.8%).Conclusion: The fluorescence PCR melting curve method is suitable for the rapid and accurate classification of SNPs. The method is economical, simple, and efficient, and is suitable for the screening of the susceptible gene SNPs in a large-scale population of patients with BA.
Collapse
Affiliation(s)
- Wang Na
- Department of Clinical Laboratory, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China
| | - Yang Rui-Rui
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan City, Shandong Province, PR China
| | - Chen Ming-Kai
- Department of Clinical Laboratory, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China
| | - Zhang Bin
- Department of Clinical Laboratory, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China
| | - Bie Qing-Li
- Department of Clinical Laboratory, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China
| | - Dong Feng-Yun
- Department of Clinical Laboratory, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China
| | - Liang Feng-Rong
- Department of Physical Examination, Medical Examination Center, Jining First People's Hospital, Jining City, Shandong Province, PR China
| | - Dong Hai-Xin
- Department of Clinical Laboratory, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China
| | - Wang Hai-Hua
- Department of Central Laboratory, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China
| | - Li Guang-Tao
- Department of Respiratory Medicine, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China
| | - Jin Cheng-Qiang
- Department of Clinical Laboratory, Affiliated Hospital of Jining Medical University, Jining City, Shandong Province, PR China.,Department of Clinical Laboratory Teaching and Research, College of Forensic Medicine and Medical Laboratory, Jining Medical University, Jining, Shandong Province, PR China
| | - Jia Yan-Xia
- Radiology Department, Jining First People's Hospital, Jining City, Shandong Province, PR China.,Department of Medical Imaging Teaching and Research, Basic Medical College, Jining Medical University, Jining City, Shandong Province, PR China
| |
Collapse
|
9
|
Moreno-Moral A, Bagnati M, Koturan S, Ko JH, Fonseca C, Harmston N, Game L, Martin J, Ong V, Abraham DJ, Denton CP, Behmoaras J, Petretto E. Changes in macrophage transcriptome associate with systemic sclerosis and mediate GSDMA contribution to disease risk. Ann Rheum Dis 2018; 77:596-601. [PMID: 29348297 PMCID: PMC5890626 DOI: 10.1136/annrheumdis-2017-212454] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [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: 09/27/2017] [Revised: 12/05/2017] [Accepted: 12/27/2017] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Several common and rare risk variants have been reported for systemic sclerosis (SSc), but the effector cell(s) mediating the function of these genetic variants remains to be elucidated. While innate immune cells have been proposed as the critical targets to interfere with the disease process underlying SSc, no studies have comprehensively established their effector role. Here we investigated the contribution of monocyte-derived macrophages (MDMs) in mediating genetic susceptibility to SSc. METHODS We carried out RNA sequencing and genome-wide genotyping in MDMs from 57 patients with SSc and 15 controls. Our differential expression and expression quantitative trait locus (eQTL) analysis in SSc was further integrated with epigenetic, expression and eQTL data from skin, monocytes, neutrophils and lymphocytes. RESULTS We identified 602 genes upregulated and downregulated in SSc macrophages that were significantly enriched for genes previously implicated in SSc susceptibility (P=5×10-4), and 270 cis-regulated genes in MDMs. Among these, GSDMA was reported to carry an SSc risk variant (rs3894194) regulating expression of neighbouring genes in blood. We show that GSDMA is upregulated in SSc MDMs (P=8.4×10-4) but not in the skin, and is a significant eQTL in SSc macrophages and lipopolysaccharide/interferon gamma (IFNγ)-stimulated monocytes. Furthermore, we identify an SSc macrophage transcriptome signature characterised by upregulation of glycolysis, hypoxia and mTOR signalling and a downregulation of IFNγ response pathways. CONCLUSIONS Our data further establish the link between macrophages and SSc, and suggest that the contribution of the rs3894194 risk variant to SSc susceptibility can be mediated by GSDMA expression in macrophages.
Collapse
Affiliation(s)
- Aida Moreno-Moral
- Centre for Computational Biology, Duke-NUS Medical School, Singapore, Singapore
| | - Marta Bagnati
- Centre for Complement and Inflammation Research, Hammersmith Hospital, Imperial College London, London, UK
| | - Surya Koturan
- Centre for Complement and Inflammation Research, Hammersmith Hospital, Imperial College London, London, UK
| | - Jeong-Hun Ko
- Centre for Complement and Inflammation Research, Hammersmith Hospital, Imperial College London, London, UK
| | - Carmen Fonseca
- Division of Medicine, Department of Inflammation, Centre for Rheumatology and Connective Tissue Diseases, Royal Free and University College Medical School, University College London, London, UK
| | - Nathan Harmston
- Centre for Computational Biology, Duke-NUS Medical School, Singapore, Singapore
| | - Laurence Game
- Genomics Laboratory, MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College London, London, UK
| | - Javier Martin
- Instituto de Parasitología y Biomedicina López Neyra, Consejo Superior de Investigaciones Cientıficas, Granada, Spain
| | - Voon Ong
- Division of Medicine, Department of Inflammation, Centre for Rheumatology and Connective Tissue Diseases, Royal Free and University College Medical School, University College London, London, UK
| | - David J Abraham
- Division of Medicine, Department of Inflammation, Centre for Rheumatology and Connective Tissue Diseases, Royal Free and University College Medical School, University College London, London, UK
| | - Christopher P Denton
- Division of Medicine, Department of Inflammation, Centre for Rheumatology and Connective Tissue Diseases, Royal Free and University College Medical School, University College London, London, UK
| | - Jacques Behmoaras
- Centre for Complement and Inflammation Research, Hammersmith Hospital, Imperial College London, London, UK
| | - Enrico Petretto
- Centre for Computational Biology, Duke-NUS Medical School, Singapore, Singapore.,Faculty of Medicine, Medical Research Council (MRC) London Institute of Medical Sciences, Imperial College London, London, UK
| |
Collapse
|
10
|
Stein MM, Thompson EE, Schoettler N, Helling BA, Magnaye KM, Stanhope C, Igartua C, Morin A, Washington C 3rd, Nicolae D, Bønnelykke K, Ober C. A decade of research on the 17q12-21 asthma locus: Piecing together the puzzle. J Allergy Clin Immunol 2018; 142:749-764.e3. [PMID: 29307657 DOI: 10.1016/j.jaci.2017.12.974] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 12/13/2017] [Accepted: 12/16/2017] [Indexed: 12/20/2022]
Abstract
Chromosome 17q12–21 remains the most highly replicated and significant asthma locus. Genotypes in the core region defined by the first genome-wide association study correlate with expression of 2 genes, ORM1-like 3 (ORMDL3) and gasdermin B (GSDMB), making these prime candidate asthma genes, although recent studies have implicated gasdermin A (GSDMA) distal to and post-GPI attachment to proteins 3 (PGAP3) proximal to the core region as independent loci. We review 10 years of studies on the 17q12–21 locus and suggest that genotype-specific risks for asthma at the proximal and distal loci are not specific to early-onset asthma and mediated by PGAP3, ORMDL3, and/or GSDMA expression. We propose that the weak and inconsistent associations of 17q single nucleotide polymorphisms with asthma in African Americans is due to the high frequency of some 17q alleles, the breakdown of linkage disequilibrium on African-derived chromosomes, and possibly different early-life asthma endotypes in these children. Finally, the inconsistent association between asthma and gene expression levels in blood or lung cells from older children and adults suggests that genotype effects may mediate asthma risk or protection during critical developmental windows and/or in response to relevant exposures in early life. Thus studies of young children and ethnically diverse populations are required to fully understand the relationship between genotype and asthma phenotype and the gene regulatory architecture at this locus. (J Allergy Clin Immunol 2018;142:749–64.)
Collapse
|