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Yang X, Dong X, Li J, Zheng A, Shi W, Shen C, Liu J. Nanocurcumin attenuates pyroptosis and inflammation through inhibiting NF-κB/GSDMD signal in high altitude-associated acute liver injury. J Biochem Mol Toxicol 2024; 38:e23606. [PMID: 38050447 DOI: 10.1002/jbt.23606] [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: 05/07/2022] [Revised: 07/12/2023] [Accepted: 11/21/2023] [Indexed: 12/06/2023]
Abstract
Exposure to a hypobaric hypoxic environment at high altitudes can lead to liver injury, and mounting evidence indicates that pyroptosis and inflammation play important roles in liver injury. Curcumin (Cur) can inhibit pyroptosis and inflammation. Therefore, our purpose here was to clarify the mechanism underlying the protective effect of nanocurcumin (Ncur) and Cur in a rat model of high altitude-associated acute liver injury. Eighty healthy rats were selected and exposed to different altitudes (6000 or 7000 m) for 0, 24, 48, or 72 h. Fifty normal healthy rats were divided into normal control, high-altitude control, salidroside (40 mg/kg [Sal-40]), Cur (200 mg/kg [Cur-200]), and Ncur (25 mg/kg [Ncur-25]) groups and exposed to a high-altitude hypobaric hypoxic environment (48 h, 7000 m). Serum-liver enzyme activities (alanine transaminase, aspartate transaminase, and lactate dehydrogenase were detected and histopathology of liver injury was evaluated by hematoxylin and eosin staining, and inflammatory factors were detected in liver tissues by enzyme-linked immunosorbent assays. Pyroptosis-associated proteins (gasdermin D, gasdermin D N-terminal [GSDMD-N], pro-Caspase-1, and cleaved-Caspase-1 [cleaved-Casp1]) and inflammation-associated proteins (nuclear factor-κB [NF-κB], phospho-NF-κB [P-NF-κB], and high-mobility group protein B1 [HMGB1]) levels were analyzed by immunoblotting. Ncur and Cur inhibited increased serum-liver enzyme activities, alleviated liver injury in rats caused by high-altitude hypobaric hypoxic exposure, and downregulated inflammatory factors, including tumor necrosis factor-α, interleukin (IL)-1β, IL-6, and IL-18, in rat liver tissues. The level of P-NF-κB, GSDMD-N, cleaved-Casp1, and HMGB1 in rat liver tissues increased significantly after high-altitude exposure. Ncur and Cur downregulated P-NF-κB, GSDMD-N, cleaved-Casp-1, and HMGB1. Ncur and Cur may inhibit inflammatory responses and pyroptosis in a rat model of high altitude-associated acute liver injury.
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Affiliation(s)
- Xinyue Yang
- Key Laboratory of Special Environmental Medicine of Xinjiang, General Hospital of Xinjang Military Command, Urumqi, China
- Graduate School, Xinjiang Medical University, Urumqi, China
| | - Xiang Dong
- Graduate School, Xinjiang Medical University, Urumqi, China
| | - Jiajia Li
- Graduate School, Xinjiang Medical University, Urumqi, China
| | - Aiping Zheng
- Institute of Pharmacology and Toxicology, Academy of Military Medicine, Beijing, China
| | - Wenhui Shi
- Graduate School, Xinjiang Medical University, Urumqi, China
| | - Caifu Shen
- Graduate School, Xinjiang Medical University, Urumqi, China
| | - Jiangwei Liu
- Graduate School, Xinjiang Medical University, Urumqi, China
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Xiong Y, Wang Y, Xiong Y, Teng L. 4-PBA inhibits hypoxia-induced lipolysis in rat adipose tissue and lipid accumulation in the liver through regulating ER stress. Food Sci Nutr 2023; 11:1223-1231. [PMID: 36911831 PMCID: PMC10002945 DOI: 10.1002/fsn3.3156] [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: 02/21/2022] [Revised: 11/05/2022] [Accepted: 11/10/2022] [Indexed: 02/12/2023] Open
Abstract
High-altitude hypoxia may disturb the metabolic modulation and function of both adipose tissue and liver. The endoplasmic reticulum (ER) is a crucial organelle in lipid metabolism and ER stress is closely correlated with lipid metabolism dysfunction. The aim of this study is to elucidate whether the inhibition of ER stress could alleviate hypoxia-induced white adipose tissue (WAT) lipolysis and liver lipid accumulation-mediated hepatic injury. A rat model of high-altitude hypoxia (5500 m) was established using hypobaric chamber. The response of ER stress and lipolysis-related pathways were analyzed in WAT under hypoxia exposure with or without 4-phenylbutyric acid (PBA) treatment. Liver lipid accumulation, liver injury, and apoptosis were evaluated. Hypoxia evoked significant ER stress in WAT, evidenced by increased GRP78, CHOP, and phosphorylation of IRE1α, PERK. Moreover, Lipolysis in perirenal WAT significantly increased under hypoxia, accompanied with increased phosphorylation of hormone-sensitive lipase (HSL) and perilipin. Treatment with 4-PBA, inhibitor of ER stress, effectively attenuated hypoxia-induced lipolysis via cAMP-PKA-HSL/perilipin pathway. In addition, 4-PBA treatment significantly inhibited the increase in fatty acid transporters (CD36, FABP1, FABP4) and ameliorated liver FFA accumulation. 4-PBA treatment significantly attenuated liver injury and apoptosis, which is likely resulting from decreased liver lipid accumulation. Our results highlight the importance of ER stress in hypoxia-induced WAT lipolysis and liver lipid accumulation.
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Affiliation(s)
- Yanlei Xiong
- Department of Pathology Xuanwu Hospital, Capital Medical University Beijing China.,Department of Pathophysiology Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS); School of Basic Medicine, Peking Union Medical College (PUMC) Beijing China
| | - Yueming Wang
- Department of Anatomy School of Basic Medicine, Binzhou Medical University Yantai China
| | - Yanlian Xiong
- Department of Anatomy School of Basic Medicine, Binzhou Medical University Yantai China
| | - Lianghong Teng
- Department of Pathology Xuanwu Hospital, Capital Medical University Beijing China
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Improvement of Total Flavonoids from Dracocephalum moldavica L. in Rats with Chronic Mountain Sickness through 1H-NMR Metabonomics. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:6695346. [PMID: 34007298 PMCID: PMC8110374 DOI: 10.1155/2021/6695346] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/12/2021] [Accepted: 04/26/2021] [Indexed: 12/12/2022]
Abstract
Background We analyzed the effects of total flavonoids from Dracocephalum moldavica L. (D. moldavica L.) on improving chronic mountain sickness (CMS) in rats using the NMR hydrogen spectrum (1H-NMR) metabonomics technology. Method We extracted the total flavonoids of D. moldavica L with 60% ethanol reflux. A CMS model was established with 48 Sprague-Dawley (SD) rats, which were then randomly divided into six groups (n = 8): control group (normal saline, 0.4 mL/100 g/d, ig); model group (normal saline, 0.4 mL/100 g/d, ig); nifedipine group (nifedipine tablets, 2.7 mg/kg/d, ig); and high-, middle-, and low-dose groups of total flavonoids from D. moldavica L. (DML.H, DML.M, and DML.L, receiving total flavonoids from D. moldavica L. at 400, 200, and 100 mg/kg/d, ig, respectively). The sera of the rats in all the groups were determined, and NMR hydrogen spectrum metabolomics was analyzed. The serum contents of apolipoproteins A1 (Apo-A1) and E (Apo-E) were determined, and histopathological changes in the brain tissue of each group were observed. Results Serum tests showed that total flavonoids from D. moldavica L. significantly increased the Apo-A1 and Apo-E levels in rats with CMS (P < 0.05). The results of serum metabonomics showed that total flavonoids from D. moldavica L can alleviate amino acid, energy, and lipid metabolism disorders in rats with CMS. Pathohistological examination of brain tissue showed that these flavonoids improved pathological changes, such as meningeal vasodilation, hyperemia, edema of brain parenchyma, inflammatory cell infiltration, increase in perivascular space, and increase in pyramidal cells. Conclusion Total flavonoids from D. moldavica L. have potential therapeutic effects on CMS. The possible mechanism is the reduction of oxidative damage through the alleviation of metabolism disorder.
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Ma Y, Zhu MM, Yang M, Luo W, Ji LH. [Expression of MMP-9 and microvessels in rat organs with chronic mountain sickness]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2021; 42:343-345. [PMID: 33979981 PMCID: PMC8120125 DOI: 10.3760/cma.j.issn.0253-2727.2021.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Indexed: 11/22/2022]
Affiliation(s)
- Y Ma
- Department of Hematology, Affiliated Hospital of Qinghai University, Xining 810000, China
| | - M M Zhu
- Department of Hematology, Affiliated Hospital of Qinghai University, Xining 810000, China
| | - M Yang
- Department of Hematology, Affiliated Hospital of Qinghai University, Xining 810000, China
| | - W Luo
- Department of Hematology, Affiliated Hospital of Qinghai University, Xining 810000, China
| | - L H Ji
- Department of Hematology, Affiliated Hospital of Qinghai University, Xining 810000, China
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Yasukochi Y, Shin S, Wakabayashi H, Maeda T. Transcriptomic Changes in Young Japanese Males After Exposure to Acute Hypobaric Hypoxia. Front Genet 2020; 11:559074. [PMID: 33101380 PMCID: PMC7506118 DOI: 10.3389/fgene.2020.559074] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 08/14/2020] [Indexed: 12/27/2022] Open
Abstract
After the genomic era, the development of high-throughput sequencing technologies has allowed us to advance our understanding of genetic variants responsible for adaptation to high altitude in humans. However, transcriptomic characteristics associated with phenotypic plasticity conferring tolerance to acute hypobaric hypoxic stress remain unclear. To elucidate the effects of hypobaric hypoxic stress on transcriptional variability, we aimed to describe transcriptomic profiles in response to acute hypobaric hypoxia in humans. In a hypobaric hypoxic chamber, young Japanese males were exposed to a barometric pressure of 493 mmHg (hypobaric hypoxia) for 75 min after resting for 30 min at the pressure of 760 mmHg (normobaric normoxia) at 28°C. Saliva samples of the subjects were collected before and after hypobaric hypoxia exposure, to be used for RNA sequencing. Differential gene expression analysis identified 30 significantly upregulated genes and some of these genes may be involved in biological processes influencing hematological or immunological responses to hypobaric hypoxic stress. We also confirmed the absence of any significant transcriptional fluctuations in the analysis of basal transcriptomic profiles under no-stimulus conditions, suggesting that the 30 genes were actually upregulated by hypobaric hypoxia exposure. In conclusion, our findings showed that the transcriptional profiles of Japanese individuals can be rapidly changed as a result of acute hypobaric hypoxia, and this change may influence the phenotypic plasticity of lowland individuals for acclimatization to a hypobaric hypoxic environment. Therefore, the results obtained in this study shed light on the transcriptional mechanisms underlying high-altitude acclimatization in humans.
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Affiliation(s)
- Yoshiki Yasukochi
- Department of Human Functional Genomics, Advanced Science Research Promotion Center, Organization for the Promotion of Regional Innovation, Mie University, Tsu, Japan
| | - Sora Shin
- Graduate School of Design, Kyushu University, Fukuoka, Japan
| | | | - Takafumi Maeda
- Department of Human Science, Faculty of Design, Kyushu University, Fukuoka, Japan.,Physiological Anthropology Research Center, Faculty of Design, Kyushu University, Fukuoka, Japan
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Shan Q, Chen N, Liu W, Qu F, Chen A. Exposure to 2,3,3',4,4',5-hexachlorobiphenyl promotes nonalcoholic fatty liver disease development in C57BL/6 mice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114563. [PMID: 32304952 DOI: 10.1016/j.envpol.2020.114563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/23/2020] [Accepted: 04/06/2020] [Indexed: 05/20/2023]
Abstract
Previous in vitro studies have indicated that 2,3,3',4,4',5-hexachlorobiphenyl (PCB 156) may be a new contributor to metabolic disruption and may further cause the occurrence of nonalcoholic fatty liver disease (NAFLD). However, no study has clarified the specific contributions of PCB 156 to NAFLD progression by constructing an in vivo model. Herein, we evaluated the effects of PCB 156 treatment (55 mg/kg, i.p.) on the livers of C57BL/6 mice fed a control diet (CD) or a high-fat diet (HFD). The results showed that PCB 156 administration increased intra-abdominal fat mass, hepatic lipid levels and dyslipidemia in the CD-fed group and aggravated NAFLD in HFD-fed group. By using transcriptomics studies and biological methods, we found that the genes expression involved in lipid metabolism pathways, such as lipogenesis, lipid accumulation and lipid β-oxidation, was greatly altered in liver tissues exposed to PCB 156. In addition, the cytochrome P450 pathway, peroxisome proliferator-activated receptors (PPARs) and the glutathione metabolism pathway were significantly activated following exposure to PCB 156. Furthermore, PCB 156 exposure increased serum transaminase levels and lipid peroxidation, and the redox-related genes were significantly dysregulated in liver tissue. In conclusion, our data suggested that PCB 156 could promote NAFLD development by altering the expression of genes related to lipid metabolism and inducing oxidative stress.
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Affiliation(s)
- Qiuli Shan
- College of Biological Science and Technology, University of Jinan, Jinan, 250022, China; State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Ningning Chen
- College of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Wei Liu
- State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Fan Qu
- College of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Anhui Chen
- Jiangsu Key Laboratory of Food Resource Development and Quality Safe, Xuzhou University of Technology, Xuzhou, China
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