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Ma W, Yang J, Zhang J, He R, Luo Y, Li C, Zhao F, Tao F, Fan J, Yin L, Zhu K, Niu S, Li L. Cerebral protective effect of in situ and remote ischemic postconditioning on ischemic stroke rat via the TGFβ1-Smad2/3 signaling pathway. Brain Res 2024; 1824:148685. [PMID: 38006988 DOI: 10.1016/j.brainres.2023.148685] [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: 10/12/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 11/27/2023]
Abstract
Patients with acute ischemic stroke achieve inadequate benefit due to the short therapeutic window for thrombolysis and the risk of ischemia/reperfusion (IR) injury. Ischemic postconditioning induces endogenous cerebral protection for acute ischemic stroke, although the protective mechanisms associated with ischemic postconditioning haven't been well clarified. In present study, the rat models of ischemic cerebral stroke with in situ and remote ischemic postconditioning (ISP and RIP) were established successfully. The Zea Longa and the modified neurological severity scoring (mNSS) were carried out to evaluate neurological function in the rats, while the open field test was explored to estimate their autonomic athletic ability. The 2,3,5-riphenyltetrazolium chloride (TTC) staining method was used to measure the size of the infarcts. TUNEL and Nissl's staining were used to detect the apoptosis rate of cells in the ischemic penumbra, with the expression of TGFβ1, Smad2, and Smad3 in the ischemic penumbra and serum detected by immunohistochemical staining, qRT-PCR, Western blots, and ELISA analysis. We showed that application of both types of ischemic postconditioning had cerebral protective effects for the ischemic stroke rats, that included effective reduction in the volume of cerebral infarction, alleviation of apoptosis and inflammation in the ischemic penumbra, and promotion of recovery of neurological function. These effects included significantly enriched gene ontology (GO) terms after RIP intervention that were related to TGFβ1, increased protein levels of TGFβ1 and decreased levels of p-Smad2/3 and smad3 following RIP intervention. We showed that the TGFβ1-Smad2/3 signaling pathway was associated with the cerebral protection of ischemic postconditioning.
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Affiliation(s)
- Wei Ma
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Jinwei Yang
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China; Second Department of General Surgery, First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Jinfen Zhang
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Rui He
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Yi Luo
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Chunyan Li
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China; Department of Neurology, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Feng Zhao
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Fengping Tao
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Jingjing Fan
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Luwei Yin
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Kewei Zhu
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Shourui Niu
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China
| | - Liyan Li
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan, China.
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Jones IH, Tao D, Vagdama B, Orford M, Eaton S, Collins J, Hall NJ. Remote ischaemic pre-conditioning reduces intestinal ischaemia reperfusion injury in a newborn rat. J Pediatr Surg 2022:S0022-3468(22)00767-9. [PMID: 36621342 DOI: 10.1016/j.jpedsurg.2022.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 11/14/2022] [Accepted: 11/26/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Remote ischaemic conditioning (RIC) has been shown to reduce ischaemia-reperfusion injury(IRI) in multiple organ systems. IRI is seen in multiple bowel pathologies in the newborn, including NEC. We investigated the potential of RIC as a novel therapy for various intestinal pathologies in the newborn. METHODS We used an established intestinal IRI model in rat pups which results in similar intestinal injury to necrotising enterocolitis (NEC). Animals were randomly allocated to IRI only(n = 14), IRI + RIC(n = 13) or sham laparotomy(n = 10). The macroscopic extent of intestinal injury is reported as a percentage of total small bowel. Injury severity was measured using Chiu-Park scoring. Neutrophil infiltration/activation was assayed by myeloperoxidase activity. Immunohistochemistry was used to assess the expression of hypoxia-inducible factor alpha (HIF-1α). Data are median (interquartile range). RESULTS Animals that underwent RIC showed a decreased extent of macroscopic injury from 100%(85-100%) in the IRI only group to 58%(15-84%, p = 0.003) in the IRI + RIC group. Microscopic injury score was significantly lower in animals that underwent RIC compared to IRI alone (3.5[1.25-5] vs 5.5[4-6], p = 0.014). Intestinal myeloperoxidase activity in animals exposed to IRI was 3.4 mU/mg of tissue (2.5-3.7) and 2.1 mU/mg(1.5-2.8) in the IRI + RIC group(p = 0.047). HIF-1α expression showed a non-significant trend towards reduced expression in the IRI + RIC group. CONCLUSIONS RIC reduces the extent and severity of bowel injury in this animal model, supporting the hypothesis that RIC has therapeutic potential for intestinal diseases in the newborn.
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Affiliation(s)
- Ian Howard Jones
- Department of Paediatric Surgery and Urology, Southampton Children's Hospital, Southampton, UK; University Surgery Unit, Faculty of Medicine, University of Southampton, Southampton, UK.
| | - Denise Tao
- Department of Histopathology, University Hospitals Southampton NHS Foundation Trust, Southampton, UK
| | - Bhumita Vagdama
- Department of Histopathology, University Hospitals Southampton NHS Foundation Trust, Southampton, UK
| | - Michael Orford
- Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London, UK
| | - Simon Eaton
- Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London, UK
| | - Jane Collins
- University Surgery Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Nigel John Hall
- Department of Paediatric Surgery and Urology, Southampton Children's Hospital, Southampton, UK; University Surgery Unit, Faculty of Medicine, University of Southampton, Southampton, UK
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Chen F, Chu CN, Ding WW. Mechanisms and prevention of intestinal barrier function damage in traumatic hemorrhagic shock. Shijie Huaren Xiaohua Zazhi 2022; 30:547-554. [DOI: 10.11569/wcjd.v30.i12.547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The intestinal barrier is composed of mechanical barrier, chemical barrier, immune barrier, and microbial barrier, which has an important role in defense against microbial invasion. The components of intestinal barrier coordinate with each other under physiological conditions to maintain the homeostasis of intestinal internal and external environment. In traumatic hemorrhagic shock, intestinal barrier function is prone to be impaired by intestinal hypoperfusion, intestinal ischemia-reperfusion injury, and many other factors. Bacterial translocation and endotoxin entry into the blood may occur, leading to enterogenic infection, multiple organ dysfunction, and even death. At present, there are many conceptual updates and technical progress on the mechanisms, prevention, and treatment of intestinal barrier function injury in traumatic hemorrhagic shock both at home and abroad. This paper intends to make a literature review in this field based on the previous research of our team, in order to provide a systematic and comprehensive theoretical system for the clinical prevention and treatment of post-traumatic intestinal dysfunction related diseases.
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Affiliation(s)
- Fang Chen
- Research Institute of General Surgery, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, Jiangsu Province, China
| | - Cheng-Nan Chu
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, Jiangsu Province, China
| | - Wei-Wei Ding
- Research Institute of General Surgery, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, Jiangsu Province, China
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