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Lv S, Zhao X, Ma C, Zhao D, Sun T, Fu W, Wei Y, Li W. Advancements in the study of acute lung injury resulting from intestinal ischemia/reperfusion. Front Med (Lausanne) 2024; 11:1399744. [PMID: 38933104 PMCID: PMC11199783 DOI: 10.3389/fmed.2024.1399744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 05/31/2024] [Indexed: 06/28/2024] Open
Abstract
Intestinal ischemia/reperfusion is a prevalent pathological process that can result in intestinal dysfunction, bacterial translocation, energy metabolism disturbances, and subsequent harm to distal tissues and organs via the circulatory system. Acute lung injury frequently arises as a complication of intestinal ischemia/reperfusion, exhibiting early onset and a grim prognosis. Without appropriate preventative measures and efficacious interventions, this condition may progress to acute respiratory distress syndrome and elevate mortality rates. Nonetheless, the precise mechanisms and efficacious treatments remain elusive. This paper synthesizes recent research models and pertinent injury evaluation criteria within the realm of acute lung injury induced by intestinal ischemia/reperfusion. The objective is to investigate the roles of pathophysiological mechanisms like oxidative stress, inflammatory response, apoptosis, ferroptosis, and pyroptosis; and to assess the strengths and limitations of current therapeutic approaches for acute lung injury stemming from intestinal ischemia/reperfusion. The goal is to elucidate potential targets for enhancing recovery rates, identify suitable treatment modalities, and offer insights for translating fundamental research into clinical applications.
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Affiliation(s)
- Shihua Lv
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xudong Zhao
- Department of Hepatopancreatobiliary, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Can Ma
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Dengming Zhao
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Tian Sun
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wenchao Fu
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yuting Wei
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wenzhi Li
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Shi Y, Jiang B, Zhao J. Induction mechanisms of autophagy and endoplasmic reticulum stress in intestinal ischemia-reperfusion injury, inflammatory bowel disease, and colorectal cancer. Biomed Pharmacother 2024; 170:115984. [PMID: 38070244 DOI: 10.1016/j.biopha.2023.115984] [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: 09/03/2023] [Revised: 11/19/2023] [Accepted: 12/02/2023] [Indexed: 01/10/2024] Open
Abstract
In recent years, the incidence of intestinal ischemia-reperfusion injury (II/RI), inflammatory bowel disease (IBD), and colorectal cancer (CRC) has been gradually increasing, posing significant threats to human health. Autophagy and endoplasmic reticulum stress (ERS) play important roles in II/RI. Damage caused by ischemia and cellular stress can activate ERS, which in turn initiates autophagy to clear damaged organelles and abnormal proteins, thereby alleviating ERS and maintaining the intestinal environment. In IBD, chronic inflammation damages intestinal tissues and activates autophagy and ERS. Autophagy is initiated by upregulating ATG genes and downregulating factors that inhibit autophagy, thereby clearing abnormal proteins, damaged organelles, and bacteria. Simultaneously, persistent inflammatory stimulation can also trigger ERS, leading to protein imbalance and abnormal folding in the ER lumen. The activation of ERS can maintain cellular homeostasis by initiating the autophagy process, thereby reducing inflammatory responses and cell apoptosis in the intestine. In CRC, excessive cell proliferation and protein synthesis lead to increased ERS. The activation of ERS, regulated by signaling pathways such as IRE1α and PERK, can initiate autophagy to clear abnormal proteins and damaged organelles, thereby reducing the negative effects of ERS. It can be seen that autophagy and ERS play a crucial regulatory role in the development of intestinal diseases. Therefore, the progress in targeted therapy for intestinal diseases based on autophagy and ERS provides novel strategies for managing intestinal diseases. In this paper, we review the advances in regulation of autophagy and ERS in intestinal diseases, emphasizing the potential molecular mechanisms for therapeutic applications.
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Affiliation(s)
- Yan Shi
- Department of Basic Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, PR China
| | - Bing Jiang
- Department of Integrated Chinese and Western Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, PR China
| | - Jingwen Zhao
- Department of Proctology, Baoji Traditional Chinese Medicine Hospital, Baoji 721001, Shanxi, PR China.
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Wang Y, Li B, Liu G, Han Q, Diao Y, Liu J. Corilagin attenuates intestinal ischemia/reperfusion injury in mice by inhibiting ferritinophagy-mediated ferroptosis through disrupting NCOA4-ferritin interaction. Life Sci 2023; 334:122176. [PMID: 37858718 DOI: 10.1016/j.lfs.2023.122176] [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: 08/24/2023] [Revised: 10/03/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023]
Abstract
AIMS Intestinal ischemia reperfusion (II/R) is a common clinical emergency. Ferroptosis is reported to play a role in II/R injury. Our previous studies revealed that corilagin significantly attenuates intestinal ischemia/reperfusion injuries. However, the underlying molecular mechanism is unclear and requires further study. MATERIALS AND METHODS DAO, GSSG/T-GSH, MDA, and Fe2+ were measured by assay kits, 4-HNE was assessed by IHC, and 15-LOX was measured by ELISA. Mitochondrial damage was observed by TEM and cellular oxidation levels were detected by C11-BODIPY 581/591 and DHE probes. LC3, p62, Beclin1, ACSL4, GPX4, NCOA4, and ferritin expression were examined by WB in vivo and in vitro. IF, co-IF, q-PCR, and constructed NCOA4-knock-down IEC-6 cells were used to evaluate the role of NCOA4 in the effect of corilagin against II/R injury. Temporal and nucleoplasmic variations with or without corilagin were observed by WB. Co-IP and molecular docking were used to investigate the NCOA4-ferritin interaction. KEY FINDINGS Corilagin attenuated II/R-induced ferroptosis both in vitro and in vivo. Further study revealed that the anti-ferroptosis bioactivity of corilagin might be due to the modulation of iron homeostasis via inhibition of ferritinophagy in an NCOA4-dependent manner. SIGNIFICANCE Corilagin might be a potential therapeutic agent for II/R-induced tissue injury.
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Affiliation(s)
- Yunxiang Wang
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China
| | - Bin Li
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China; Dalian Anti-Infective Traditional Chinese Medicine Development Engineering Technology Research Center, Dalian 116044, China
| | - Guanting Liu
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China
| | - Qipeng Han
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China
| | - Yunpeng Diao
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China; Dalian Anti-Infective Traditional Chinese Medicine Development Engineering Technology Research Center, Dalian 116044, China.
| | - Jing Liu
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China; Dalian Anti-Infective Traditional Chinese Medicine Development Engineering Technology Research Center, Dalian 116044, China.
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4
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Sidheeque Hassan V, Hanifa M, Navik U, Bali A. Exogenous fetuin-A protects against sepsis-induced myocardial injury by inhibiting oxidative stress and inflammation in mice. Fundam Clin Pharmacol 2023; 37:607-617. [PMID: 36647295 DOI: 10.1111/fcp.12870] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/23/2022] [Accepted: 01/09/2023] [Indexed: 01/18/2023]
Abstract
Sepsis-induced myocardial injury is a consequence of septicemia and is one of the major causes of death in intensive care units. A serum glycoprotein called fetuin-A is secreted largely by the liver, tongue, placenta, and adipose tissue. Fetuin-A has a variety of biological and pharmacological properties. The anti-inflammatory and antioxidant glycoprotein fetuin-A has shown its efficacy in a number of inflammatory disorders including sepsis. However, its protective role against sepsis-induced myocardial injury remains elusive. The purpose of this work is to explore the role of fetuin-A in mouse models of myocardial injury brought on by cecal ligation and puncture (CLP). CLP significantly induced the myocardial injury assessed in terms of elevated myocardial markers (serum CK-MB, cTnI levels), inflammatory markers (IL-6, TNF-α) in the serum, and oxidative stress markers (increased MDA levels and decreased reduced glutathione) in heart tissue homogenate following 24 h of ligation and puncture. Further, hematoxylin and eosin (H&E) staining showed considerable histological alterations in the myocardial tissue of sepsis-developed mice. Interestingly, fetuin-A pretreatment (50 and 100 mg/kg) for 4 days before the CLP procedure significantly improved the myocardial injury and was evaluated in perspective of a reduction in the CK-MB, cTnI levels, IL-6, and TNF-α in sepsis-developed animals. Fetuin-A pretreatment significantly attenuated the oxidative stress and improved the myocardial morphology in a dose-dependent manner. The present study provides preliminary evidence that fetuin-A exerts protection against sepsis-induced cardiac dysfunction in vivo via suppression of inflammation and oxidative damage.
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Affiliation(s)
- V Sidheeque Hassan
- Department of Pharmacology, Central University of Punjab, Bathinda, India
| | - Mohd Hanifa
- Department of Pharmacology, Central University of Punjab, Bathinda, India
| | - Umashanker Navik
- Department of Pharmacology, Central University of Punjab, Bathinda, India
| | - Anjana Bali
- Department of Pharmacology, Central University of Punjab, Bathinda, India
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Alghanem B, Mansour FA, Shaibah H, Almuhalhil K, Almourfi F, Alamri HS, Alajmi H, Rashid M, Alroqi F, Jalouli M, Harrath AH, Boudjellal M, Barhoumi T. Quantitative proteomics analysis of COVID-19 patients: Fetuin-A and tetranectin as potential modulators of innate immune responses. Heliyon 2023; 9:e15224. [PMID: 37064481 PMCID: PMC10082967 DOI: 10.1016/j.heliyon.2023.e15224] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/26/2023] [Accepted: 03/30/2023] [Indexed: 04/18/2023] Open
Abstract
Treatment of severe cases of coronavirus disease 2019 (COVID-19) is extremely important to minimize death and end-organ damage. Here we performed a proteomic analysis of plasma samples from mild, moderate and severe COVID-19 patients. Analysis revealed differentially expressed proteins and different therapeutic potential targets related to innate immune responses such as fetuin-A, tetranectin (TN) and paraoxonase-1 (PON1). Furthermore, protein changes in plasma showed dysregulation of complement and coagulation cascades in COVID-19 patients compared to healthy controls. In conclusion, our proteomics data suggested fetuin-A and TN as potential targets that might be used for diagnosis as well as signatures for a better understanding of the pathogenesis of COVID-19 disease.
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Affiliation(s)
- Bandar Alghanem
- Medical Research Core Facility and Platforms, King Abdullah International Medical Research Centre, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Fatmah A Mansour
- Medical Research Core Facility and Platforms, King Abdullah International Medical Research Centre, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Hayat Shaibah
- Medical Research Core Facility and Platforms, King Abdullah International Medical Research Centre, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Khawlah Almuhalhil
- Medical Research Core Facility and Platforms, King Abdullah International Medical Research Centre, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Feras Almourfi
- Medical Research Core Facility and Platforms, King Abdullah International Medical Research Centre, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Hassan S Alamri
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Hala Alajmi
- Saudi Biobank, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard - Health Affairs, Riyadh, Saudi Arabia
| | - Mamoon Rashid
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Fayhan Alroqi
- Department of Pediatrics, King Abdulaziz Medical City, King Abdullah Specialized Children's Hospital, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Maroua Jalouli
- Department of Biology, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11623, Saudi Arabia
| | - Abdel Halim Harrath
- King Saud University, Department of Zoology, College of Sciences, Riyadh, 11451, Saudi Arabia
| | - Mohammad Boudjellal
- Medical Research Core Facility and Platforms, King Abdullah International Medical Research Centre, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Tlili Barhoumi
- Medical Research Core Facility and Platforms, King Abdullah International Medical Research Centre, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
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Tang B, Luo Z, Zhang R, Zhang D, Nie G, Li M, Dai Y. An update on the molecular mechanism and pharmacological interventions for Ischemia-reperfusion injury by regulating AMPK/mTOR signaling pathway in autophagy. Cell Signal 2023; 107:110665. [PMID: 37004834 DOI: 10.1016/j.cellsig.2023.110665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023]
Abstract
AMP-activated protein kinase (5'-adenosine monophosphate-activated protein kinase, AMPK)/mammalian target of rapamycin (mTOR) is an important signaling pathway maintaining normal cell function and homeostasis in vivo. The AMPK/mTOR pathway regulates cellular proliferation, autophagy, and apoptosis. Ischemia-reperfusion injury (IRI) is secondary damage that frequently occurs clinically in various disease processes and treatments, and the exacerbated injury during tissue reperfusion increases disease-associated morbidity and mortality. IRI arises from multiple complex pathological mechanisms, among which cell autophagy is a focus of recent research and a new therapeutic target. The activation of AMPK/mTOR signaling in IRI can modulate cellular metabolism and regulate cell proliferation and immune cell differentiation by adjusting gene transcription and protein synthesis. Thus, the AMPK/mTOR signaling pathway has been intensively investigated in studies focused on IRI prevention and treatment. In recent years, AMPK/mTOR pathway-mediated autophagy has been found to play a crucial role in IRI treatment. This article aims to elaborate the action mechanisms of AMPK/mTOR signaling pathway activation in IRI and summarize the progress of AMPK/mTOR-mediated autophagy research in the field of IRI therapy.
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Affiliation(s)
- Bin Tang
- Department of Ultrasound, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Zhijian Luo
- Department of Ultrasound, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Rong Zhang
- Department of Ultrasound, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Dongmei Zhang
- Department of Ultrasound, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Guojun Nie
- The First Outpatient Department of People's Liberation Army Western Theater General Hospital, Cheng Du, Sichuan Province 61000, China
| | - Mingxing Li
- Department of Ultrasound, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province 646000, China.
| | - Yan Dai
- Department of pharmacy, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province 646000, China.
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Zhao P, Wei Y, Sun G, Xu L, Wang T, Tian Y, Chao H, Tu Y, Ji J. Fetuin-A alleviates neuroinflammation against traumatic brain injury-induced microglial necroptosis by regulating Nrf-2/HO-1 pathway. J Neuroinflammation 2022; 19:269. [PMID: 36333786 PMCID: PMC9636801 DOI: 10.1186/s12974-022-02633-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 10/28/2022] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND The microglia-mediated inflammatory response is a vital mechanism of secondary damage following traumatic brain injury (TBI), but the underlying mechanism of microglial activation is unclear. METHODS Controlled cortical impact (CCI) was induced in adult male C57BL/6J mice, and glutamate was used to construct a classical in vitro injury model in the primary microglia. Microglial activation was determined by western blot and immunostaining. The inflammatory factors were measured by enzyme-linked immunosorbent assay. The oxidative stress marker and mitochondrial reactive oxygen species (ROS) were measured by immunoblotting and MitoSox Red staining. Transmission electron microscopy was used to observe the typical morphology of necroptotic cells. RESULTS Our quantitative proteomics identified 2499 proteins; 157 were significantly differentially expressed in brain tissue between the 6 h after CCI (CCI6h) group and sham group, and 109 were significantly differentially expressed between the CCI24h and sham groups. Moreover, compared with the sham group, the terms "acute-phase response", "inflammation", and "protein binding" were significantly enriched in CCI groups. Fetuin-A, a liver-secreted acute-phase glycoprotein, was involved in these biological processes. Using an experimental TBI model, we found that the Fetuin-A level peaked at 6 h and then decreased gradually. Importantly, we showed that administration of Fetuin-A reduced the cortical lesion volume and edema area and inhibited the inflammatory response, which was associated with suppressing microglial necroptosis, thus decreasing microglial activation. Furthermore, administration of Fetuin-A attenuated mitochondrial oxidative stress in glutamate-treated microglial cells, which is a critical mechanism of necroptosis suppression. In addition, we demonstrated that Fetuin-A treatment promoted translocation of nuclear factor erythroid 2-related factor 2 (Nrf-2) from the cytoplasm to the nucleus in vivo; however, the Nrf-2 inhibitor ML385 and si-heme oxygenase-1 (si-HO-1) disrupted the regulation of oxidative stress by Fetuin-A and induced increased ROS levels and necroptosis in glutamate-treated microglial cells. Fetuin-A also protected neurons from adverse factors in vivo and in vitro. CONCLUSIONS Our results demonstrated that Fetuin-A activated Nrf-2/HO-1, suppressed oxidative stress and necroptosis levels, and thereby attenuates the abnormal inflammatory response following TBI. The findings suggest a potential therapeutic strategy for TBI treatment.
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Affiliation(s)
- Pengzhan Zhao
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China ,grid.412679.f0000 0004 1771 3402Department of Neurosurgery, The First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, 230031 Anhui China
| | - Yutian Wei
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China
| | - Guangchi Sun
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China
| | - Lei Xu
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China
| | - Tian Wang
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China
| | - Yufei Tian
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China
| | - Honglu Chao
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China
| | - Yiming Tu
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China
| | - Jing Ji
- grid.412676.00000 0004 1799 0784Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029 Jiangsu China ,grid.89957.3a0000 0000 9255 8984Gusu School, Nanjing Medical University, Suzhou, 215031 Jiangsu China
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Dengler F, Sternberg F, Grages M, Kästner SBR, Verhaar N. Adaptive mechanisms in no flow vs. low flow ischemia in equine jejunum epithelium: Different paths to the same destination. Front Vet Sci 2022; 9:947482. [PMID: 36157182 PMCID: PMC9493374 DOI: 10.3389/fvets.2022.947482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/17/2022] [Indexed: 01/18/2023] Open
Abstract
Intestinal ischemia reperfusion injury (IRI) is a frequent complication of equine colic. Several mechanisms may be involved in adaptation of the intestinal epithelium to IRI and might infer therapeutic potential, including hypoxia-inducible factor (HIF) 1α, AMP-activated protein kinase (AMPK), nuclear factor-erythroid 2-related factor 2 (NRF2), and induction of autophagy. However, the mechanisms supporting adaptation and thus cellular survival are not completely understood yet. We investigated the activation of specific adaptation mechanisms in both no and low flow ischemia and reperfusion simulated in equine jejunum epithelium in vivo. We found an activation of HIF1α in no and low flow ischemia as indicated by increased levels of HIF1α target genes and phosphorylation of AMPKα tended to increase during ischemia. Furthermore, the protein expression of the autophagy marker LC3B in combination with decreased expression of nuclear-encoded mitochondrial genes indicates an increased rate of mitophagy in equine intestinal IRI, possibly preventing damage by mitochondria-derived reactive oxygen species (ROS). Interestingly, ROS levels were increased only shortly after the onset of low flow ischemia, which may be explained by an increased antioxidative defense, although NFR2 was not activated in this setup. In conclusion, we could demonstrate that a variety of adaptation mechanisms manipulating different aspects of cellular homeostasis are activated in IRI irrespective of the ischemia model, and that mitophagy might be an important factor for epithelial survival following small intestinal ischemia in horses that should be investigated further.
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Affiliation(s)
- Franziska Dengler
- Department of Biochemical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine, Vienna, Austria
- *Correspondence: Franziska Dengler
| | - Felix Sternberg
- Department of Biochemical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine, Vienna, Austria
| | - Marei Grages
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Sabine BR Kästner
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Nicole Verhaar
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
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Zhao L, Shang Y, Luo Q, Ma X, Ni W, He Y, Yang D, Xu Y, Gao Z. Decreased plasma fetuin-A level as a novel bioindicator of poor prognosis in community-acquired pneumonia: A multi-center cohort study. Front Med (Lausanne) 2022; 9:807536. [PMID: 35966877 PMCID: PMC9372348 DOI: 10.3389/fmed.2022.807536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 07/11/2022] [Indexed: 11/29/2022] Open
Abstract
Background Community-acquired pneumonia (CAP) is a respiratory disease that frequently requires hospital admission, and is a significant cause of death worldwide. Plasma fetuin-A levels were significantly lower in patients with sepsis, but data regarding CAP are scarce. This study aimed to evaluate the usefulness of fetuin-A as a prognostic biomarker of CAP. Methods A multicenter cohort study on CAP was conducted between January 2017 and December 2018. Demographic and clinical data were recorded for all enrolled patients. Plasma fetuin-A levels were determined using a quantitative enzyme-linked immunosorbent assay. A Cox proportional hazards regression analysis was used to analyse the effect of variables on 30-day mortality. A logistic regression analysis was performed to assess risk factors associated with severe CAP (SCAP) and 30-day mortality. A receiver operating characteristic (ROC) curve was used to verify the association between variables and CAP prognosis. Correlations were assessed using Spearman's test. Survival curves were constructed and compared using the log-rank test. Results A total of 283 patients with CAP were enrolled in this study. Fetuin-A levels were decreased in patients with CAP, especially in SCAP and non-survivors. A cox regression analysis showed that CURB-65 and fetuin-A levels were independent prognostic indicators of 30-day mortality. Via a multiple logistic regression analysis, plasma level of fetuin-A (<202.86 mg/L) was determined to be the strongest independent predictor of 30-day mortality considered (odds ratio, 57.365), and also was also determined to be an independent predictor of SCAP. The area under the curve (AUC) of fetuin-A for predicting 30-day mortality was 0.871, and accuracy was high (P < 0.05). Plasma fetuin-A levels were negatively correlated with WBC, NE%, Glu, CRP, PCT, CURB-65, and pneumonia severity index scores and positively correlated with albumin level. Kaplan–Meier curves showed that lower plasma levels of fetuin-A levels were associated with increased 30-day mortality levels (P < 0.0001). Conclusion Plasma fetuin-A levels were decreased in patients with CAP. Fetuin-A can reliably predict mortality in patients with CAP, and is a useful diagnostic indicator of SCAP.
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Affiliation(s)
- Lili Zhao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Ying Shang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Qiongzhen Luo
- Department of Respiratory and Critical Care Medicine, School of Clinical Medicine, Beijing Tsinghua Changgung Hospital, Tsinghua University, Beijing, China
| | - Xinqian Ma
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Wentao Ni
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Yukun He
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Donghong Yang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Yu Xu
- Department of Respiratory and Critical Care Medicine, Beijing Jishuitan Hospital, Beijing, China
- Yu Xu
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
- *Correspondence: Zhancheng Gao
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Zhenzhen L, Wenting L, Jianmin Z, Guangru Z, Disheng L, Zhiyu Z, Feng C, Yajing S, Yingxiang H, Jipeng L, Zhanhai W, Yan Z, Xin L, Yongqiang L, Yufang L. miR-146a-5p/TXNIP axis attenuates intestinal ischemia-reperfusion injury by inhibiting autophagy via the PRKAA/mTOR signaling pathway. Biochem Pharmacol 2021; 197:114839. [PMID: 34774846 DOI: 10.1016/j.bcp.2021.114839] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/20/2021] [Accepted: 11/09/2021] [Indexed: 11/02/2022]
Abstract
Autophagy is being increasingly recognized as an important regulator of intestinal ischemia-reperfusion(I/R)injury, but its exact role is still debated. Emerging evidence suggests that miR-146a-5p is involved in the initiation and development of I/R injury, but its role in intestinal I/R injury remains unclear. The present study generated an intestinal I/R mouse model and an oxygen glucose deprivation/reoxygenation (OGD/R) Caco-2 cell model and found that autophagy was increased and contributed to the intestinal injury and cell death induced by I/R and OGD/R. In addition, in both I/R and OGD/R models, the miR-146a-5p expression level was decreased and accompanied by an increase in TXNIP expression. By transfecting cells with an miR-146a-5p inhibitor or mimic, we observed that miR-146a-5p inhibits autophagy during OGD/R by targeting TXNIP; this was confirmed by the dual luciferase reporter gene assay. Additionally, through overexpression and knockdown cell lines, we established that TXNIP regulates autophagy during intestinal I/R via the PRKAA/mTOR pathway. The interaction between TXNIP and p-PRKAA was verified by immunofluorescence co-localization and immunoprecipitation assays. Moreover, we confirmed that TXNIP is indispensable for miR-146a-5p-mediated cell protection. Finally, we observed that miR-146a-5p overexpression inhibits autophagy and attenuates intestinal I/R injury via the PRKAA/mTOR pathway by targeting TXNIP in vivo. In conclusion, this study highlights the role of miR-146a-5p in regulating autophagy by targeting TXNIP, suggesting that miR-146a-5p may be a novel drug target for intestinal I/R therapy.
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Affiliation(s)
- Liu Zhenzhen
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Leng Wenting
- The Second School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Zhang Jianmin
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Zhang Guangru
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Liu Disheng
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Zhao Zhiyu
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Chen Feng
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Shi Yajing
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Hao Yingxiang
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Lv Jipeng
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Wan Zhanhai
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Zhang Yan
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Liu Xin
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Liu Yongqiang
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Leng Yufang
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China; The Department of Anesthesiology, The First Hospital of Lanzhou University, Lanzhou, China.
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