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Chen K, Ruan Y, Ma W, Yu X, Hu Y, Li Y, Tang H, Zhang X, Yin Y, Chen D, Song Z. FGF8 Protects Against Polymicrobial Sepsis by Enhancing the Host's Anti-infective Immunity. J Infect Dis 2025; 231:e659-e670. [PMID: 39556487 PMCID: PMC11998567 DOI: 10.1093/infdis/jiae559] [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: 09/05/2024] [Revised: 11/05/2024] [Accepted: 11/14/2024] [Indexed: 11/20/2024] Open
Abstract
BACKGROUND Sepsis is characterized by a life-threatening syndrome caused by an unbalanced host response to infection. Fibroblast growth factor 8 (FGF8) has been newly identified to play important roles in inflammation and innate immunity, but its role in host response to sepsis is undefined. METHODS A cecal ligation and puncture (CLP)-induced mouse sepsis model was established to evaluate the immunomodulatory function of FGF8 during sepsis. The underlying molecular mechanisms were elucidated by cell models using relevant molecular biology experiments. The clinical value of FGF8 in the adjuvant diagnosis of sepsis was evaluated using clinical samples. RESULTS FGF8 protein concentrations were elevated in CLP-induced septic mice compared to controls. In vivo, FGF8 blockade using anti-FGF8 antibody significantly increased mortality and bacterial burden and was paralleled by significantly aggravated tissue injury after CLP. Therapeutic administration of recombinant FGF8 (rFGF8) improved the bacterial clearance and mortality of septic mice in a FGFR1-dependent manner. In vitro, FGF8 directly enhanced bacterial phagocytosis and killing of macrophages by enhancing the phosphorylation of the ERK1/2 signaling pathway, which could be abrogated with the ERK1/2 pathway inhibitor U0126. Clinically, serum FGF8 levels in both adult and pediatric patients with sepsis in an intensive care unit were significantly higher than those in healthy controls. CONCLUSIONS These results present a previously unrecognized role of FGF8 in improving survival of sepsis by enhancing host immune defense. Therefore, targeting FGF8 may provide new strategies for the diagnosis and immunotherapy of sepsis.
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Affiliation(s)
- Kai Chen
- Department of Clinical Laboratory, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing, China
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine, Chongqing Medical University, Chongqing, China
| | - Yanting Ruan
- Department of Clinical Laboratory, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing, China
| | - Wenjing Ma
- Department of Clinical Laboratory, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing, China
| | - Xiaoyan Yu
- Department of Clinical Laboratory, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing, China
| | - Ying Hu
- Department of Clinical Laboratory, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing, China
| | - Yue Li
- Molecular Medicine and Cancer Research Center, College of Basic Medical Sciences, Chongqing Medical University, Chongqing, China
| | - Hong Tang
- Department of Critical Care Medicine, Department of Surgical Intensive Care Unit, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xuemei Zhang
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine, Chongqing Medical University, Chongqing, China
| | - Yibing Yin
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine, Chongqing Medical University, Chongqing, China
| | - Dapeng Chen
- Department of Clinical Laboratory, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing, China
| | - Zhixin Song
- Department of Clinical Laboratory, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatric Metabolism and Inflammatory Diseases, Chongqing, China
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Rodríguez-Martín M, Báez-Flores J, Ribes V, Isidoro-García M, Lacal J, Prieto-Matos P. Non-Mammalian Models for Understanding Neurological Defects in RASopathies. Biomedicines 2024; 12:841. [PMID: 38672195 PMCID: PMC11048513 DOI: 10.3390/biomedicines12040841] [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: 02/27/2024] [Revised: 03/27/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
RASopathies, a group of neurodevelopmental congenital disorders stemming from mutations in the RAS/MAPK pathway, present a unique opportunity to delve into the intricacies of complex neurological disorders. Afflicting approximately one in a thousand newborns, RASopathies manifest as abnormalities across multiple organ systems, with a pronounced impact on the central and peripheral nervous system. In the pursuit of understanding RASopathies' neurobiology and establishing phenotype-genotype relationships, in vivo non-mammalian models have emerged as indispensable tools. Species such as Danio rerio, Drosophila melanogaster, Caenorhabditis elegans, Xenopus species and Gallus gallus embryos have proven to be invaluable in shedding light on the intricate pathways implicated in RASopathies. Despite some inherent weaknesses, these genetic models offer distinct advantages over traditional rodent models, providing a holistic perspective on complex genetics, multi-organ involvement, and the interplay among various pathway components, offering insights into the pathophysiological aspects of mutations-driven symptoms. This review underscores the value of investigating the genetic basis of RASopathies for unraveling the underlying mechanisms contributing to broader neurological complexities. It also emphasizes the pivotal role of non-mammalian models in serving as a crucial preliminary step for the development of innovative therapeutic strategies.
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Affiliation(s)
- Mario Rodríguez-Martín
- Laboratory of Functional Genetics of Rare Diseases, Department of Microbiology and Genetics, University of Salamanca, 37007 Salamanca, Spain; (M.R.-M.); (J.B.-F.)
- Institute of Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.I.-G.); (P.P.-M.)
| | - Juan Báez-Flores
- Laboratory of Functional Genetics of Rare Diseases, Department of Microbiology and Genetics, University of Salamanca, 37007 Salamanca, Spain; (M.R.-M.); (J.B.-F.)
- Institute of Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.I.-G.); (P.P.-M.)
| | - Vanessa Ribes
- Institut Jacques Monod, Université Paris Cité, CNRS, F-75013 Paris, France;
| | - María Isidoro-García
- Institute of Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.I.-G.); (P.P.-M.)
- Clinical Biochemistry Department, Hospital Universitario de Salamanca, 37007 Salamanca, Spain
- Clinical Rare Diseases Reference Unit DiERCyL, 37007 Castilla y León, Spain
- Department of Medicine, University of Salamanca, 37007 Salamanca, Spain
| | - Jesus Lacal
- Laboratory of Functional Genetics of Rare Diseases, Department of Microbiology and Genetics, University of Salamanca, 37007 Salamanca, Spain; (M.R.-M.); (J.B.-F.)
- Institute of Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.I.-G.); (P.P.-M.)
| | - Pablo Prieto-Matos
- Institute of Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (M.I.-G.); (P.P.-M.)
- Clinical Rare Diseases Reference Unit DiERCyL, 37007 Castilla y León, Spain
- Department of Pediatrics, Hospital Universitario de Salamanca, 37007 Salamanca, Spain
- Department of Biomedical and Diagnostics Science, University of Salamanca, 37007 Salamanca, Spain
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miR-6742-5p regulates the invasion and migration of lung adenocarcinoma cells via mediating FGF8/ERK12/MMP9/MMP2 signaling pathway. Aging (Albany NY) 2023; 15:53-69. [PMID: 36629518 PMCID: PMC9876640 DOI: 10.18632/aging.204277] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/22/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND microRNAs (miRNAs) are involved in the progression of Lung adenocarcinoma (LUAD), however, the functions of miR-6742-5p in LUAD remains unknown, thereby this study was carried on. METHODS The mRNA and miRNA expression data from the LUAD and normal control were obtained from Gene Expression Omnibus (GEO) database, TargetScan and mirDIP were applied to predict the relationship between miR-6742-5p and FGF8.Q-PCR, western blot, dual-luciferase, wound Healing and transwell assays were performed to test the functions of miR-6742-5p in LUAD. RESULTS Bioinformatics analysis and dual-luciferase identified FGF8 is the target-gene of miR-6742-5p, which is declined in LUAD of human tissues and cell lines, and miR-6742-5P OE suppressed the progression of LUAD in nude mice. MiR-6742-5p OE and KD suppressed or increased the abilities of LUAD' metastasis tested by wound healing and transwell assays H522 and PC-9 cells, these effects about miR-6742-5p OE were reversed by FGF8; miR-6742-5p OE, KD inhibited and increased the expression of FGF8 as its downstream p-ERK1/2, MMP-2/-9, these results were corrected by ERK1/2 inhibitor: Ro 67-7476; the miR-6742-5p KD increased the migrated and invaded cells and suppressed by MMPs inhibitor: S3304. These results identified the negative correlation of miR-6742-5p with FGF8-ERK1/2 signal pathway in LUAD progression. CONCLUSIONS We conclude that miR-6742-5p might be a regulator of LUAD progression by targeting FGF8/ERK1/2/MMPs signaling pathway, which provides a novel therapeutic target for LUAD.
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