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Almeida PRJ, Periard AM, Tana FL, Avila RE, Milhorato LB, Alcantara KMM, Resende CB, Serufo AV, Santos FR, Teixeira DC, Queiroz-Junior CM, Fonseca TCM, Silva BLV, Costa VV, Souza RP, Perretti M, Jonassen TEN, Teixeira MM. Effects of a pro-resolving drug in COVID-19: preclinical studies to a randomized, placebo-controlled, phase Ib/IIa trial in hospitalized patients. Br J Pharmacol 2024. [PMID: 39159951 DOI: 10.1111/bph.17322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 05/22/2024] [Accepted: 06/03/2024] [Indexed: 08/21/2024] Open
Abstract
INTRODUCTION Pro-resolving molecules may curb disease caused by viruses without altering the capacity of the host to deal with infection. AP1189 is a melanocortin receptor-biased agonist endowed with pro-resolving and anti-inflammatory activity. We evaluated the preclinical and early clinical effects of treatment with AP1189 in the context of COVID-19. METHODS C57BL/6j mice were infected intranasally with MHV-A59 or hK18-ACE2 mice with SARS-CoV-2. AP1189 (10 mg·kg-1, BID, s.c.) was given to the animals from day 2 and parameters evaluated at day 5. Human PBMCs from health donors were infected with SARS-CoV-2 in presence or absence of AP1189 and production of cytokines quantified. In the clinical study, 6 patients were initially given AP1189 (100 mg daily for 14 days) and this was followed by a randomized (2:1), placebo-controlled, double-blind trial that enrolled 54 hospitalized COVID-19 patients needing oxygen support. The primary outcome was the time in days until respiratory recovery, defined as a SpO2 ≥ 93% in ambient air. RESULTS Treatment with AP1189 attenuated pulmonary inflammation in mice infected with MHV-A59 or SARS-CoV-2 and decreased the release of CXCL10, TNF-α and IL-1β by human PBMCs. Hospitalized COVID-19 patients already taking glucocorticoids took a median time of 6 days until respiratory recovery when given placebo versus 4 days when taking AP1189 (P = 0.017). CONCLUSION Treatment with AP1189 was associated with less disease caused by beta-coronavirus infection both in mice and in humans. This is the first demonstration of the effects of a pro-resolving molecule in the context of severe infection in humans.
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Affiliation(s)
- Pedro R J Almeida
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Alexandre M Periard
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fernanda L Tana
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Larissa B Milhorato
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Katlen M M Alcantara
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Carolina B Resende
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Angela V Serufo
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Felipe R Santos
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Danielle C Teixeira
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Celso M Queiroz-Junior
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Talita C M Fonseca
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Barbara L V Silva
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Vivian V Costa
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Renan P Souza
- Genetics Department, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mauro Perretti
- William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Thomas E N Jonassen
- Synact Pharma Aps, Holte, Denmark and Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mauro M Teixeira
- Center for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Zhu Y, Zhang Y, He S, Yi S, Feng H, Xia X, Fang X, Gong X, Zhao P. Integrating single-nucleus RNA sequencing and spatial transcriptomics to elucidate a specialized subpopulation of astrocytes, microglia and vascular cells in brains of mouse model of lipopolysaccharide-induced sepsis-associated encephalopathy. J Neuroinflammation 2024; 21:169. [PMID: 38961424 PMCID: PMC11223438 DOI: 10.1186/s12974-024-03161-0] [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: 02/22/2024] [Accepted: 06/26/2024] [Indexed: 07/05/2024] Open
Abstract
BACKGROUND Understanding the mechanism behind sepsis-associated encephalopathy (SAE) remains a formidable task. This study endeavors to shed light on the complex cellular and molecular alterations that occur in the brains of a mouse model with SAE, ultimately unraveling the underlying mechanisms of this condition. METHODS We established a murine model using intraperitoneal injection of lipopolysaccharide (LPS) in wild type and Anxa1-/- mice and collected brain tissues for analysis at 0-hour, 12-hour, 24-hour, and 72-hour post-injection. Utilizing advanced techniques such as single-nucleus RNA sequencing (snRNA-seq) and Stereo-seq, we conducted a comprehensive characterization of the cellular responses and molecular patterns within the brain. RESULTS Our study uncovered notable temporal differences in the response to LPS challenge between Anxa1-/- (annexin A1 knockout) and wild type mice, specifically at the 12-hour and 24-hour time points following injection. We observed a significant increase in the proportion of Astro-2 and Micro-2 cells in these mice. These cells exhibited a colocalization pattern with the vascular subtype Vas-1, forming a distinct region known as V1A2M2, where Astro-2 and Micro-2 cells surrounded Vas-1. Moreover, through further analysis, we discovered significant upregulation of ligands and receptors such as Timp1-Cd63, Timp1-Itgb1, Timp1-Lrp1, as well as Ccl2-Ackr1 and Cxcl2-Ackr1 within this region. In addition, we observed a notable increase in the expression of Cd14-Itgb1, Cd14-Tlr2, and Cd14-C3ar1 in regions enriched with Micro-2 cells. Additionally, Cxcl10-Sdc4 showed broad upregulation in brain regions containing both Micro-2 and Astro-2 cells. Notably, upon LPS challenge, there was an observed increase in Anxa1 expression in the mouse brain. Furthermore, our study revealed a noteworthy increase in mortality rates following Anxa1 knockdown. However, we did not observe substantial differences in the types, numbers, or distribution of other brain cells between Anxa1-/- and wildtype mice over time. Nevertheless, when comparing the 24-hour post LPS injection time point, we observed a significant decrease in the proportion and distribution of Micro-2 and Astro-2 cells in the vicinity of blood vessels in Anxa1-/- mice. Additionally, we noted reduced expression levels of several ligand-receptor pairs including Cd14-Tlr2, Cd14-C3ar1, Cd14-Itgb1, Cxcl10-Sdc4, Ccl2-Ackr1, and Cxcl2-Ackr1. CONCLUSIONS By combining snRNA-seq and Stereo-seq techniques, our study successfully identified a distinctive cellular colocalization, referred to as a special pathological niche, comprising Astro-2, Micro-2, and Vas-1 cells. Furthermore, we observed an upregulation of ligand-receptor pairs within this niche. These findings suggest a potential association between this cellular arrangement and the underlying mechanisms contributing to SAE or the increased mortality observed in Anxa1 knockdown mice.
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Grants
- 2021A1515012429 Natural Science Foundation of Guangdong Province, China
- 211102114530659 Shaoguan Municipal Science and Technology Program, China
- 20221807 Shaoguan Engineering Research Center for Research and Development of Molecular and Cellular Technology in Rapid Diagnosis of Infectious Diseases and Cancer Program, China
- KEYANSHEN (2023) 01 Research Fund for Joint Laboratory for Digital and Precise Detection of Clinical Pathogens, Yuebei People's Hospital Affiliated to Shantou University Medical College, China
- RS202001 Research Project for Outstanding Scholar of Yuebei People's Hospital, Shantou University Medical College, China
- Research Fund for Joint Laboratory for Digital and Precise Detection of Clinical Pathogens, Yuebei People’s Hospital Affiliated to Shantou University Medical College, China
- Research Project for Outstanding Scholar of Yuebei People’s Hospital, Shantou University Medical College, China
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Affiliation(s)
- Yanyan Zhu
- Department of Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, No 133, Huimin Road South, Wujiang District, Shaoguan, 512025, China
- Laboratory for Diagnosis of Clinical Microbiology and Infection, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China
- Research Center for Interdisciplinary & High-quality Innovative Development in Laboratory Medicine, Shaoguan, 512025, China
- Shaoguan Municipal Quality Control Center for Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China
- Shaoguan Municipal Quality Control Center for Surveillance of Bacterial Resistance, Shaoguan, 512025, China
- Shaoguan Engineering Research Center for Research and Development of Molecular and Cellular Technology in Rapid Diagnosis of Infectious Diseases and Cancer, Shaoguan, 512025, China
| | - Yin Zhang
- BGI-Shenzhen, Shenzhen, 518083, China
| | - Sheng He
- Department of Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, No 133, Huimin Road South, Wujiang District, Shaoguan, 512025, China
- Laboratory for Diagnosis of Clinical Microbiology and Infection, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China
- Research Center for Interdisciplinary & High-quality Innovative Development in Laboratory Medicine, Shaoguan, 512025, China
- Shaoguan Municipal Quality Control Center for Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China
- Shaoguan Municipal Quality Control Center for Surveillance of Bacterial Resistance, Shaoguan, 512025, China
- Shaoguan Engineering Research Center for Research and Development of Molecular and Cellular Technology in Rapid Diagnosis of Infectious Diseases and Cancer, Shaoguan, 512025, China
| | - Sanjun Yi
- Department of Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, No 133, Huimin Road South, Wujiang District, Shaoguan, 512025, China
- Laboratory for Diagnosis of Clinical Microbiology and Infection, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China
- Research Center for Interdisciplinary & High-quality Innovative Development in Laboratory Medicine, Shaoguan, 512025, China
- Shaoguan Municipal Quality Control Center for Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China
- Shaoguan Municipal Quality Control Center for Surveillance of Bacterial Resistance, Shaoguan, 512025, China
- Shaoguan Engineering Research Center for Research and Development of Molecular and Cellular Technology in Rapid Diagnosis of Infectious Diseases and Cancer, Shaoguan, 512025, China
| | - Hao Feng
- Jiaxing University Master Degree Cultivation Base, Zhejiang Chinese Medical University, Jiaxing, 314001, China
| | - Xianzhu Xia
- Department of Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, No 133, Huimin Road South, Wujiang District, Shaoguan, 512025, China
- Laboratory for Diagnosis of Clinical Microbiology and Infection, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China
- Research Center for Interdisciplinary & High-quality Innovative Development in Laboratory Medicine, Shaoguan, 512025, China
| | | | - Xiaoqian Gong
- Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China.
| | - Pingsen Zhao
- Department of Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, No 133, Huimin Road South, Wujiang District, Shaoguan, 512025, China.
- Laboratory for Diagnosis of Clinical Microbiology and Infection, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China.
- Research Center for Interdisciplinary & High-quality Innovative Development in Laboratory Medicine, Shaoguan, 512025, China.
- Shaoguan Municipal Quality Control Center for Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, 512025, China.
- Shaoguan Municipal Quality Control Center for Surveillance of Bacterial Resistance, Shaoguan, 512025, China.
- Shaoguan Engineering Research Center for Research and Development of Molecular and Cellular Technology in Rapid Diagnosis of Infectious Diseases and Cancer, Shaoguan, 512025, China.
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Ayilam Ramachandran R, Lemoff A, Robertson DM. Extracellular vesicles released by host epithelial cells during Pseudomonas aeruginosa infection function as homing beacons for neutrophils. Cell Commun Signal 2024; 22:341. [PMID: 38907250 PMCID: PMC11191230 DOI: 10.1186/s12964-024-01609-7] [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: 01/23/2024] [Accepted: 04/10/2024] [Indexed: 06/23/2024] Open
Abstract
BACKGROUND Pseudomonas aeruginosa (PA) is an opportunistic pathogen that can cause sight threatening infections in the eye and fatal infections in the cystic fibrosis airway. Extracellular vesicles (EVs) are released by host cells during infection and by the bacteria themselves; however, there are no studies on the composition and functional role of host-derived EVs during PA infection of the eye or lung. Here we investigated the composition and capacity of EVs released by PA infected epithelial cells to modulate innate immune responses in host cells. METHODS Human telomerase immortalized corneal epithelial cells (hTCEpi) cells and human telomerase immortalized bronchial epithelial cells (HBECs) were treated with a standard invasive test strain of Pseudomonas aeruginosa, PAO1, for 6 h. Host derived EVs were isolated by qEV size exclusion chromatography. EV proteomic profiles during infection were compared using mass spectrometry and functional studies were carried out using hTCEpi cells, HBECs, differentiated neutrophil-like HL-60 cells, and primary human neutrophils isolated from peripheral blood. RESULTS EVs released from PA infected corneal epithelial cells increased pro-inflammatory cytokine production in naïve corneal epithelial cells and induced neutrophil chemotaxis independent of cytokine production. The EVs released from PA infected bronchial epithelial cells were also chemotactic although they failed to induce cytokine secretion from naïve HBECs. At the proteomic level, EVs derived from PA infected corneal epithelial cells exhibited lower complexity compared to bronchial epithelial cells, with the latter having reduced protein expression compared to the non-infected control. CONCLUSIONS This is the first study to comprehensively profile EVs released by corneal and bronchial epithelial cells during Pseudomonas infection. Together, these findings show that EVs released by PA infected corneal and bronchial epithelial cells function as potent mediators of neutrophil migration, contributing to the exuberant neutrophil response that occurs during infection in these tissues.
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Affiliation(s)
| | - Andrew Lemoff
- The Departments of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Danielle M Robertson
- The Departments of Ophthalmology, UT Southwestern Medical Center, Dallas, TX, USA.
- The Department of Ophthalmology, UT Southwestern Medical Center, 5323 Harry Hines Blvd, 75390-9057, Dallas, TX, USA.
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Wang S, Song Y, Wang Z, Chang X, Wu H, Yan Z, Wu J, He Z, Kang L, Hu W, Xia T, Li Z, Ren X, Bai Y. Neutrophil-derived PAD4 induces citrullination of CKMT1 exacerbates mucosal inflammation in inflammatory bowel disease. Cell Mol Immunol 2024; 21:620-633. [PMID: 38720063 PMCID: PMC11143373 DOI: 10.1038/s41423-024-01158-6] [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: 09/22/2023] [Accepted: 03/21/2024] [Indexed: 06/02/2024] Open
Abstract
Peptidyl arginine deiminase 4 (PAD4) plays a pivotal role in infection and inflammatory diseases by facilitating the formation of neutrophil extracellular traps (NETs). However, the substrates of PAD4 and its exact role in inflammatory bowel disease (IBD) remain unclear. In this study, we employed single-cell RNA sequencing (scRNA-seq) and substrate citrullination mapping to decipher the role of PAD4 in intestinal inflammation associated with IBD. Our results demonstrated that PAD4 deficiency alleviated colonic inflammation and restored intestinal barrier function in a dextran sulfate sodium (DSS)-induced colitis mouse model. scRNA-seq analysis revealed significant alterations in intestinal cell populations, with reduced neutrophil numbers and changes in epithelial subsets upon PAD4 deletion. Gene expression analysis highlighted pathways related to inflammation and epithelial cell function. Furthermore, we found that neutrophil-derived extracellular vesicles (EVs) carrying PAD4 were secreted into intestinal epithelial cells (IECs). Within IECs, PAD4 citrullinates mitochondrial creatine kinase 1 (CKMT1) at the R242 site, leading to reduced CKMT1 protein stability via the autophagy pathway. This action compromises mitochondrial homeostasis, impairs intestinal barrier integrity, and induces IECs apoptosis. IEC-specific depletion of CKMT1 exacerbated intestinal inflammation and apoptosis in mice with colitis. Clinical analysis of IBD patients revealed elevated levels of PAD4, increased CKMT1 citrullination, and decreased CKMT1 expression. In summary, our findings highlight the crucial role of PAD4 in IBD, where it modulates IECs plasticity via CKMT1 citrullination, suggesting that PAD4 may be a potential therapeutic target for IBD.
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Affiliation(s)
- Shuling Wang
- National Clinical Research Center for Digestive Diseases, Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
- Changhai Clinical Research Unit, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China
| | - Yihang Song
- National Clinical Research Center for Digestive Diseases, Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Zhijie Wang
- National Clinical Research Center for Digestive Diseases, Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Xin Chang
- National Clinical Research Center for Digestive Diseases, Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
| | - Haicong Wu
- National Clinical Research Center for Digestive Diseases, Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
| | - Ziwei Yan
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Jiayi Wu
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
| | - Zixuan He
- Changhai Clinical Research Unit, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Le Kang
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Wenjun Hu
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Tian Xia
- National Clinical Research Center for Digestive Diseases, Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- Changhai Clinical Research Unit, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Zhaoshen Li
- National Clinical Research Center for Digestive Diseases, Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China.
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China.
- Changhai Clinical Research Unit, Changhai Hospital, Naval Medical University, Shanghai, 200433, China.
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China.
| | - Xingxing Ren
- Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China.
| | - Yu Bai
- National Clinical Research Center for Digestive Diseases, Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China.
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China.
- Changhai Clinical Research Unit, Changhai Hospital, Naval Medical University, Shanghai, 200433, China.
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China.
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Suh SB, Suh JY, Cho SB. Analyzing secretory proteins in human dermal fibroblast-conditioned medium for angiogenesis: A bioinformatic approach. Skin Res Technol 2024; 30:e13568. [PMID: 38200622 PMCID: PMC10781896 DOI: 10.1111/srt.13568] [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: 12/07/2023] [Accepted: 12/19/2023] [Indexed: 01/12/2024]
Abstract
BACKGROUND The conditioned medium from human dermal fibroblasts (dermal fibroblast-conditioned medium; DFCM) contains a diverse array of secretory proteins, including growth factors and wound repair-promoting proteins. Angiogenesis, a crucial process that facilitates the infiltration of inflammatory cells during wound repair, is induced by a hypoxic environment and inflammatory cytokines. METHODS In this study, we conducted a comprehensive bioinformatic analysis of 337 proteins identified through proteomics analysis of DFCM. We specifically focused on 64 DFCM proteins with potential involvement in angiogenesis. These proteins were further classified based on their characteristics, and we conducted a detailed analysis of their protein-protein interactions. RESULTS Gene Ontology protein classification categorized these 64 DFCM proteins into various classes, including metabolite interconversion enzymes (N = 11), protein modifying enzymes (N = 10), protein-binding activity modulators (N = 9), cell adhesion molecules (N = 6), extracellular matrix proteins (N = 6), transfer/carrier proteins (N = 3), calcium-binding proteins (N = 2), chaperones (N = 2), cytoskeletal proteins (N = 2), RNA metabolism proteins (N = 1), intercellular signal molecules (N = 1), transporters (N = 1), scaffold/adaptor proteins (N = 1), and unclassified proteins (N = 9). Furthermore, our protein-protein interaction network analysis of DFCM proteins revealed two distinct networks: one with medium confidence level interaction scores, consisting of 60 proteins with significant connections, and another at a high confidence level, comprising 52 proteins with significant interactions. CONCLUSIONS Our bioinformatic analysis highlights the presence of a multitude of secretory proteins in DFCM that form significant protein-protein interaction networks crucial for regulating angiogenesis. These findings underscore the critical roles played by DFCM proteins in various stages of angiogenesis during the wound repair process.
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Affiliation(s)
| | | | - Sung Bin Cho
- Yonsei Seran Dermatology and Laser ClinicSeoulSouth Korea
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