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Tsai CY, Lee CL, Wu JCC. Astrocyte-secreted lipocalin-2 elicits bioenergetic failure-induced neuronal death that is causally related to high fatality in a mouse model of hepatic encephalopathy. Neurochem Int 2024; 178:105800. [PMID: 38964718 DOI: 10.1016/j.neuint.2024.105800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 06/24/2024] [Accepted: 07/01/2024] [Indexed: 07/06/2024]
Abstract
Hepatic encephalopathy (HE) is a neurological complication arising from acute liver failure with poor prognosis and high mortality; the underlying cellular mechanisms are still wanting. We previously found that neuronal death caused by mitochondrial dysfunction in rostral ventrolateral medulla (RVLM), which leads to baroreflex dysregulation, is related to high fatality in an animal model of HE. Lipocalin-2 (Lcn2) is a secreted glycoprotein mainly released by astrocytes in the brain. We noted the presence of Lcn2 receptor (Lcn2R) in RVLM neurons and a parallel increase of Lcn2 gene in astrocytes purified from RVLM during experimental HE. Therefore, our guiding hypothesis is that Lcn2 secreted by reactive astrocytes in RVLM may underpin high fatality during HE by eliciting bioenergetic failure-induced neuronal death in this neural substrate. In this study, we first established the role of astrocyte-secreted Lcn2 in a liver toxin model of HE induced by azoxymethane (100 μg/g, ip) in C57BL/6 mice, followed by mechanistic studies in primary astrocyte and neuron cultures prepared from postnatal day 1 mouse pups. In animal study, immunoneutralization of Lcn2 reduced apoptotic cell death in RVLM, reversed defunct baroreflex-mediated vasomotor tone and prolonged survival during experimental HE. In our primary cell culture experiments, Lcn2 produced by cultured astrocytes and released into the astrocyte-conditioned medium significantly reduced cell viability of cultured neurons. Recombinant Lcn2 protein reduced cell viability, mitochondrial ATP (mitoATP) production, and pyruvate dehydrogenase (PDH) activity but enhanced the expression of pyruvate dehydrogenase kinase (PDK) 1, PDK3 and phospho-PDHA1 (inactive PDH) through MAPK/ERK pathway in cultured neurons, with all cellular actions reversed by Lcn2R knockdown. Our results suggest that astrocyte-secreted Lcn2 upregulates PDKs through MAPK/ERK pathway, which leads to reduced PDH activity and mitoATP production; the reinforced neuronal death in RVLM is causally related to baroreflex dysregulation that underlies high fatality associated with HE.
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Affiliation(s)
- Ching-Yi Tsai
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan.
| | - Chin-Lai Lee
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Jacqueline C C Wu
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
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Wang J, Jin J, Li G. NR3C2 activates LCN2 transcription to promote endoplasmic reticulum stress and cell apoptosis in ischemic cerebral infarction. Brain Res 2024; 1822:148632. [PMID: 37832761 DOI: 10.1016/j.brainres.2023.148632] [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: 08/25/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 10/15/2023]
Abstract
Endoplasmic reticulum (ER) stress can lead to cell death and worsen tissue damage during ischemic events. Nuclear receptor subfamily 3 group C member 2 (NR3C2) and lipocalin 2 (LCN2) are known to be associated with ER stress. In this study, we obtained a potential interaction between NR3C2 and LCN2 through bioinformatics. The primary objective was to investigate their roles and interactions in the context of ER stress in ischemic cerebral infarction (ICI). A mouse model of ICI was generated by middle cerebral artery occlusion, resulting in elevated levels of NR3C2 and LCN2 in brain tissues. NR3C2 bound to the LCN2 promoter, thereby activating its transcription. Either knockdown of LCN2 or NR3C2 led to an improvement in neurologic deficits in mice, along with a reduction in infract size, tissue damage, ER stress, inflammation, and cell apoptosis in their brain tissues. Similar results were reproduced in HT22 cells, where LCN2 or NR3C2 knockdown alleviated oxygen-glucose deprivation-induced ER stress, inflammation, and cell apoptosis while improving cell viability. However, the protective effects of NR3C2 knockdown were counteracted when LCN2 was overexpressed, both in vitro and in vivo. Overall, this study demonstrates that NR3C2 activates LCN2 transcription, ultimately promoting ER stress and cell apoptosis in the context of ICI.
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Affiliation(s)
- Jianxiu Wang
- Department of Neurology, Heilongjiang Provincial Hospital, Harbin 150001, Heilongjiang, PR China
| | - Jing Jin
- Department of Neurology, Heilongjiang Provincial Hospital, Harbin 150001, Heilongjiang, PR China
| | - Guozhong Li
- Department of Neurology, Heilongjiang Provincial Hospital, Harbin 150001, Heilongjiang, PR China.
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Han Y, Luo L, Li H, Zhang L, Yan Y, Fang M, Yu J, Gao X, Liu Y, Huang C, Fan S. Nomilin and its analogue obacunone alleviate NASH and hepatic fibrosis in mice via enhancing antioxidant and anti-inflammation capacity. Biofactors 2023; 49:1189-1204. [PMID: 37401768 DOI: 10.1002/biof.1987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/16/2023] [Indexed: 07/05/2023]
Abstract
Nonalcoholic steatohepatitis (NASH) and hepatic fibrosis are leading causes of cirrhosis with rising morbidity and mortality worldwide. Currently, there is no appropriate treatment for NASH and hepatic fibrosis. Many studies have shown that oxidative stress is a main factor inducing NASH. Nomilin (NML) and obacunone (OBA) are limonoid compounds naturally occurring in citrus fruits with various biological properties. However, whether OBA and NML have beneficial effects on NASH remains unclear. Here, we demonstrated that OBA and NML inhibited hepatic tissue necrosis, inflammatory infiltration and liver fibrosis progression in methionine and choline-deficient (MCD) diet, carbon tetrachloride (CCl4 )-treated and bile duct ligation (BDL) NASH and hepatic fibrosis mouse models. Mechanistic studies showed that NML and OBA enhanced anti-oxidative effects, including reduction of malondialdehyde (MDA) level, increase of catalase (CAT) activity and the gene expression of glutathione S-transferases (GSTs) and Nrf2-keap1 signaling. Additional, NML and OBA inhibited the expression of inflammatory gene interleukin 6 (Il-6), and regulated the bile acid metabolism genes Cyp3a11, Cyp7a1, multidrug resistance-associated protein 3 (Mrp3). Overall, these findings indicate that NML and OBA may alleviate NASH and liver fibrosis in mice via enhancing antioxidant and anti-inflammation capacity. Our study proposed that NML and OBA may be potential strategies for NASH treatment.
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Affiliation(s)
- Yongli Han
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lingling Luo
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hongli Li
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lijun Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yingxuan Yan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Minglv Fang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jing Yu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiaoyan Gao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ying Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Cheng Huang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shengjie Fan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Tecos ME, Steinberger AE, Guo J, Rubin DC, Davidson NO, Warner BW. Disruption of Enterohepatic Circulation of Bile Acids Ameliorates Small Bowel Resection Associated Hepatic Injury. J Pediatr Surg 2023; 58:1074-1078. [PMID: 36914459 PMCID: PMC10355217 DOI: 10.1016/j.jpedsurg.2023.02.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 02/10/2023] [Indexed: 02/23/2023]
Abstract
BACKGROUND Massive small bowel resection (SBR) is associated with liver injury and fibrosis. Efforts to elucidate the driving force behind hepatic injury have identified multiple factors, including the generation of toxic bile acid metabolites. METHODS Sham, 50% proximal, and 50% distal SBR were carried out in C57BL/6 mice to determine the effect of jejunal (proximal SBR) versus ileocecal resection (distal SBR) on bile acid metabolism and liver injury. Tissues were harvested at 2 and 10-week postoperative timepoints. RESULTS When compared with 50% proximal SBR, mice that underwent distal SBR exhibited less hepatic oxidative stress as verified by decreased mRNA expression of tumor necrosis factor-α (TNFα, p ≤ 0.0001), nicotinamide adenine dinucleotide phosphate oxidase (NOX, p ≤ 0.0001), and glutathione synthetase (GSS, p ≤ 0.05). Distal SBR mice also exhibited a more hydrophilic bile acid profile with reduced abundance of insoluble bile acids (cholic acid (CA), taurodeoxycholic acid (TCA), and taurolithocholic acid (TLCA)), and increased abundance of soluble bile acids (tauroursodeoxycholic acid (TUDCA)). In contrast with proximal SBR, ileocecal resection alters enterohepatic circulation leading to reduced oxidative stress and promotes physiological bile acid metabolism. CONCLUSION These findings challenge the notion that preservation of the ileocecal region is beneficial in patients with short bowel syndrome. Administration of selected bile acids may present potential therapy to mitigate resection-associated liver injury. LEVEL OF EVIDENCE III-Case-Control Study.
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Affiliation(s)
- Maria E Tecos
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110 St. Louis, MO, 63110, USA
| | - Allie E Steinberger
- Department of Surgery, Barnes Jewish Hospital, Washington University in St. Louis School of Medicine, 9901 Wohl Hospital, Campus Box 8109, St. Louis, MO, 63110, USA
| | - Jun Guo
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110 St. Louis, MO, 63110, USA
| | - Deborah C Rubin
- Division of Gastroenterology, Department of Medicine, Washington University in St. Louis School of Medicine, Washington University, Campus Box 8124, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Nicholas O Davidson
- Division of Gastroenterology, Department of Medicine, Washington University in St. Louis School of Medicine, Washington University, Campus Box 8124, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Brad W Warner
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110 St. Louis, MO, 63110, USA.
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Borkham-Kamphorst E, Meurer SK, Weiskirchen R. Expression and biological function of the cellular communication network factor 5 (CCN5) in primary liver cells. J Cell Commun Signal 2023:10.1007/s12079-023-00757-8. [PMID: 37166689 DOI: 10.1007/s12079-023-00757-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 04/28/2023] [Indexed: 05/12/2023] Open
Abstract
The cellular (centralized) communication network (CCN) factor protein family contains six small secreted cysteine-rich proteins sharing high structural similarity. These matricellular proteins have vital biological functions in cell adhesion, migration, cell cycle progression, and control of production and degradation of extracellular matrix. However, in liver the biological functions of CCN proteins become most visible during hepatic injury, disease, and remodeling. In particular, most of the hepatic functions of CCN proteins were derived from CCN2/CTGF, which becomes highly expressed in damaged hepatocytes and acts as a profibrogenic molecule. On the contrary, CCN1/CYR61 seems to have opposite effects, while the biological activity during hepatic fibrosis is somewhat controversially discussed for other CCN family members. In the present study, we analyzed the expression of CCN5/WISP2 in cultures of different types of primary liver cells and in an experimental model of hepatic fibrosis. We found that CCN5 is expressed in hepatic stellate cells, myofibroblasts and portal myofibroblasts, while CCN5 expression is virtually absent in hepatocytes. During hepatic fibrogenesis, CCN5 is significantly upregulated. Overexpression of CCN5 in portal myofibroblasts reduced expression of transforming growth factor-β receptor I (ALK5) and concomitant Smad2 activation, whereas JunB expression is upregulated. Moreover, elevated expression of CCN5 induces endoplasmic reticulum stress, unfolded protein response and apoptosis in portal myofibroblasts. We suggest that upregulated expression of CCN5 might be an intrinsic control mechanism that counteracts overshooting fibrotic responses in profibrogenic liver cells.
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Affiliation(s)
- Erawan Borkham-Kamphorst
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry (IFMPEGKC), RWTH University Hospital Aachen, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Steffen K Meurer
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry (IFMPEGKC), RWTH University Hospital Aachen, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Ralf Weiskirchen
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry (IFMPEGKC), RWTH University Hospital Aachen, Pauwelsstr. 30, 52074, Aachen, Germany.
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Steinberger AE, Tecos ME, Phelps HM, Rubin DC, Davidson NO, Guo J, Warner BW. A novel maladaptive unfolded protein response as a mechanism for small bowel resection-induced liver injury. Am J Physiol Gastrointest Liver Physiol 2022; 323:G165-G176. [PMID: 35727920 PMCID: PMC9377788 DOI: 10.1152/ajpgi.00302.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 05/10/2022] [Accepted: 05/10/2022] [Indexed: 01/31/2023]
Abstract
The unfolded protein response (UPR) is a complex adaptive signaling pathway activated by the accumulation of misfolded proteins in the endoplasmic reticulum (ER). ER stress (ERS) triggers a cascade of responses that converge upon C/EBP homologous protein (CHOP) to drive inflammation and apoptosis. Herein, we sought to determine whether liver injury and fibrosis after small bowel resection (SBR) were mediated by a maladaptive hepatic ERS/UPR. C57BL/6 mice underwent 50% proximal SBR or sham operation. Markers of liver injury and UPR/ERS pathways were analyzed. These were compared with experimental groups including dietary fat manipulation, tauroursodeoxycholic acid (TUDCA) treatment, distal SBR, and global CHOP knockout (KO). At 10 wk, proximal SBR had elevated alanine aminotransferase/aspartate aminotransferase (ALT/AST) (P < 0.005) and greater hepatic tumor necrosis factor-α (TNFα) (P = 0.001) and collagen type 1 α1 (COL1A1) (P = 0.02) than shams. SBR livers had increased CHOP and p-eIF2α, but were absent in activating transcription factor 4 (ATF4) protein expression. Low-fat diet (LFD), TUDCA, and distal SBR groups had decreased liver enzymes, inflammation, and fibrosis (P < 0.05). Importantly, they demonstrated reversal of hepatic UPR with diminished CHOP and robust ATF4 signal. CHOP KO-SBR had decreased ALT but not AST compared with wild-type (WT)-SBR (P = 0.01, P = 0.12). There were no differences in TNFα and COL1A1 (P = 0.09, P = 0.50). SBR-induced liver injury, fibrosis is associated with a novel hepatic UPR/ERS response characterized by increased CHOP and decreased ATF4. LFD, TUDCA, and ileocecal resection rescued the hepatic phenotype and reversed the UPR pattern. Global CHOP KO only partially attenuated liver injury. This underscores the significance of disruptions to the gut/liver axis after SBR and potentiates targets to mitigate the progression of intestinal failure-associated liver disease.NEW & NOTEWORTHY The unfolded protein response (UPR) is a complex signaling cascade that converges upon C/EBP-homologous protein (CHOP). Under conditions of chronic cellular stress, the UPR shifts from homeostatic to proapoptotic leading to inflammation and cell death. Here, we provide evidence that small bowel resection-induced liver injury and fibrosis are mediated by a maladaptive hepatic UPR. Low-fat diet, TUDCA treatment, and ileocecal resection rescued the hepatic phenotype and reversed the UPR pattern.
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Affiliation(s)
- Allie E Steinberger
- Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Maria E Tecos
- Department of Surgery, University of Nebraska Medical Center, Omaha, Nebraska
| | - Hannah M Phelps
- Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Deborah C Rubin
- Division of Gastroenterology, Department of Medicine, Washington University, St. Louis, Missouri
| | - Nicholas O Davidson
- Division of Gastroenterology, Department of Medicine, Washington University, St. Louis, Missouri
| | - Jun Guo
- Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Brad W Warner
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis Children's Hospital, St. Louis, Missouri
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Ma B, Xing T, Li J, Zhang L, Jiang Y, Gao F. Chronic heat stress causes liver damage via endoplasmic reticulum stress-induced apoptosis in broilers. Poult Sci 2022; 101:102063. [PMID: 36049294 PMCID: PMC9445382 DOI: 10.1016/j.psj.2022.102063] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 07/13/2022] [Accepted: 07/19/2022] [Indexed: 11/17/2022] Open
Abstract
Liver is a central metabolic organ, which is sensitive to heat stress. Liver damage affects animals' health and endangers the livestock and poultry industry. This study aimed to investigate the mechanism of chronic heat stress-induced liver damage in broiler chickens. Broilers were divided into 3 treatments: normal control group (NOR, 22°C), heat stress group (HS, 32°C) and pair-feeding group (PF, 22°C) for a 7-d and 14-d trial. The results showed that 7 d heat exposure caused microvesicular steatosis and reduced glutamine synthetase activity in broiler liver (P < 0.05). After 14 d of heat exposure, heat stress caused vacuolar degeneration and apoptosis in the liver; elevated liver relative weight and liver glutaminase activity as well as plasma ammonia level (P < 0.05). Additionally, heat stress enhanced GRP78 protein expression and the mRNA expressions of endoplasmic reticulum (ER) stress responses genes and apoptosis-related genes in broiler liver after 14 d of heat exposure (P < 0.05). In conclusion, chronic heat stress triggered ER stress-induced apoptosis and caused liver damage, which may compromise ammonia detoxification in broiler liver.
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Affiliation(s)
- Bingbing Ma
- College of Animal Science and Technology, Key Laboratory of Animal Origin Food Production and Safety Guarantee of Jiangsu Province, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Joint International Research Laboratory of Animal Health and Food Safety, National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, P.R. China
| | - Tong Xing
- College of Animal Science and Technology, Key Laboratory of Animal Origin Food Production and Safety Guarantee of Jiangsu Province, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Joint International Research Laboratory of Animal Health and Food Safety, National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, P.R. China
| | - Jiaolong Li
- Institute of Agri-Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P.R. China
| | - Lin Zhang
- College of Animal Science and Technology, Key Laboratory of Animal Origin Food Production and Safety Guarantee of Jiangsu Province, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Joint International Research Laboratory of Animal Health and Food Safety, National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, P.R. China
| | - Yun Jiang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P.R. China
| | - Feng Gao
- College of Animal Science and Technology, Key Laboratory of Animal Origin Food Production and Safety Guarantee of Jiangsu Province, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Joint International Research Laboratory of Animal Health and Food Safety, National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, P.R. China.
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Luo C, Zhou S, Yin S, Jian L, Luo P, Dong J, Liu E. Lipocalin-2 and Cerebral Stroke. Front Mol Neurosci 2022; 15:850849. [PMID: 35493318 PMCID: PMC9039332 DOI: 10.3389/fnmol.2022.850849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 02/23/2022] [Indexed: 11/26/2022] Open
Abstract
Stroke is a common and devastating disease with an escalating prevalence worldwide. The known secondary injuries after stroke include cell death, neuroinflammation, blood-brain barrier disruption, oxidative stress, iron dysregulation, and neurovascular unit dysfunction. Lipocalin-2 (LCN-2) is a neutrophil gelatinase-associated protein that influences diverse cellular processes during a stroke. The role of LCN-2 has been widely recognized in the peripheral system; however, recent findings have revealed that there are links between LCN-2 and secondary injury and diseases in the central nervous system. Novel roles of LCN-2 in neurons, microglia, astrocytes, and endothelial cells have also been demonstrated. Here, we review the evidence on the regulatory roles of LCN-2 in secondary injuries following a stroke from various perspectives and the pathological mechanisms involved in the modulation of stroke. Overall, our review suggests that LCN-2 is a promising target to promote a better understanding of the neuropathology of stroke.
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Affiliation(s)
- Chao Luo
- Department of Neurosurgery, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Shuai Zhou
- Department of Neurosurgery, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
- Department of Neurosurgery, The First People’s Hospital of Yunnan Province, Kunming, China
| | - Shi Yin
- Department of Neurosurgery, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Lipeng Jian
- Department of Neurosurgery, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Pengren Luo
- Department of Neurosurgery, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Jigeng Dong
- Department of Neurosurgery, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Erheng Liu
- Department of Neurosurgery, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
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Wei Y, Ma D, Fan Y, Gao C, Wang Q, Yuan Y, Zhang Y, Han J, Hao Z. Environmental carbon tetrachloride exposure disrupts the liver structure and metabolic detoxification function in mice via p38MAPK/NF-κB/NLRP3 pathway. FOOD AGR IMMUNOL 2022. [DOI: 10.1080/09540105.2022.2060192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Yuanyuan Wei
- Department of clinical veterinary medicine, Innovation Centre of Chinese veterinary medicine, China Agricultural University, Beijing, People’s Republic of China
| | - Danyang Ma
- Department of clinical veterinary medicine, Innovation Centre of Chinese veterinary medicine, China Agricultural University, Beijing, People’s Republic of China
| | - Yimeng Fan
- Department of clinical veterinary medicine, Innovation Centre of Chinese veterinary medicine, China Agricultural University, Beijing, People’s Republic of China
| | - Chen Gao
- Department of clinical veterinary medicine, Innovation Centre of Chinese veterinary medicine, China Agricultural University, Beijing, People’s Republic of China
| | - Qingtao Wang
- Department of clinical veterinary medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, People’s Republic of China
| | - Yanyan Yuan
- Agricultural Bio-pharmaceutical Laboratory, College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, People’s Republic of China
| | - Yannan Zhang
- Department of clinical veterinary medicine, Innovation Centre of Chinese veterinary medicine, China Agricultural University, Beijing, People’s Republic of China
| | - Juncheng Han
- Department of clinical veterinary medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, People’s Republic of China
| | - Zhihui Hao
- Department of clinical veterinary medicine, Innovation Centre of Chinese veterinary medicine, China Agricultural University, Beijing, People’s Republic of China
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Borkham-Kamphorst E, Haas U, Pinoé-Schmidt M, Abdallah AT, Weiskirchen R. Chronic mineral oil administration increases hepatic inflammation in wild type mice compared to lipocalin 2 null mice. J Transl Med 2021; 101:1528-1539. [PMID: 34518636 PMCID: PMC8590977 DOI: 10.1038/s41374-021-00672-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/22/2021] [Accepted: 08/23/2021] [Indexed: 11/09/2022] Open
Abstract
Lipocalin 2 (LCN2), an acute-phase protein produced during acute liver injury, plays an important role in the innate immune response against bacterial infection via iron scavenging. LCN2 further influences neutrophil development and physiology leading to increased inflammatory responses. We investigated the roles of LCN2 in chronic inflammation and fibrosis, using repeated carbon tetrachloride (CCl4) in mineral-oil injection. Surprisingly, mice treated with the mineral oil vehicle alone showed liver inflammation, evidenced by neutrophil and monocyte-macrophage infiltration. Fluorescence-activated cell sorting (FACS) of isolated liver leukocytes showed significantly high CD45+ leukocyte concentrations in CCl4 mice, but no difference of Ly6G+ neutrophils between mineral oil and CCl4 application. Liver CD11b+ F4/80+ cells counted higher in CCl4 mice, but the proportions of Gr1high, an indicator of inflammation, were significantly higher in mineral oil groups. Liver myeloperoxidase (MPO), expressed in neutrophils and monocytes, showed higher levels in wild type mice compared to Lcn2-/- in both mineral-oil and CCl4 treated groups. Hepatic and serum LCN2 levels were remarkably higher in the mineral oil-injected wild type group compared to the CCl4. Wild type animals receiving mineral oil showed significantly higher inflammatory cytokine- and chemokine mRNA levels compared to Lcn2-/- mice, with no differences in the CCl4 treated groups. RNA sequencing (RNA-Seq) confirmed significant downregulation of gene sets involved in myeloid cell activation and immune responses in Lcn2 null mice receiving chronic mineral oil versus wild-type. We observed significant upregulation of gene sets and proteins involved in cell cycle DNA replication, with downregulation of collagen-containing extracellular matrix genes in Lcn2-/- mice receiving CCl4, compared to the wild type. Consequently, the wild type mice developed slightly more liver fibrosis compared to Lcn2-/- mice, evidenced by higher levels of collagen type I in the CCl4 groups and no liver fibrosis in mineral oil-treated mice. Our findings indicate that serum and hepatic LCN2 levels correlate with hepatic inflammation rather than fibrosis.
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Affiliation(s)
- Erawan Borkham-Kamphorst
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, RWTH Aachen University Hospital, Aachen, Germany.
| | - Ute Haas
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, RWTH Aachen University Hospital, Aachen, Germany
| | - Manuela Pinoé-Schmidt
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, RWTH Aachen University Hospital, Aachen, Germany
| | - Ali T Abdallah
- Interdisciplinary Center for Clinical Research, University Hospital RWTH, Aachen, Germany
| | - Ralf Weiskirchen
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, RWTH Aachen University Hospital, Aachen, Germany.
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