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Li Z, Xu T, Peng L, Tang X, Chi Q, Li M, Li S. Polystyrene nanoplastics aggravates lipopolysaccharide-induced apoptosis in mouse kidney cells by regulating IRE1/XBP1 endoplasmic reticulum stress pathway via oxidative stress. J Cell Physiol 2023; 238:151-164. [PMID: 36370432 DOI: 10.1002/jcp.30913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/03/2022] [Accepted: 10/27/2022] [Indexed: 11/13/2022]
Abstract
Nanoplastics (NPs) pollution poses a huge threat to the ecosystem and has become one of the environmental pollutants that have attracted much attention. There is increasing evidence that both oxidative stress and endoplasmic reticulum stress (ERS) are associated with polystyrene nanoplastics (PS-NPs) exposure. Lipopolysaccharide (LPS) has been shown to induce apoptotic damage in various tissues, but whether PS-NPs can aggravate LPS-induced apoptosis in mouse kidneys through oxidative stress-regulated inositol-requiring enzyme 1 (IRE1)/X-box binding protein 1 (XBP1) ERS pathway remains unclear. In this study, based on the establishment of in vitro and in vivo PS-NPs and LPS exposure models alone and in combination in mice and HEK293 cells, the effects and mechanisms of PS-NPs on LPS-induced renal cell apoptosis were investigated. The results showed that PS-NPs could aggravate LPS-induced apoptosis. PS-NPs/LPS can induce ERS through oxidative stress, activate the IRE1/XBP1 pathway, and promote the expression of apoptosis markers (Caspase-3 and Caspase-12). Kidney oxidative stress, ERS, and apoptosis in PS-NPs + LPS combined exposure group were more severe than those in the single exposure group. Interestingly, 4-phenylbutyric acid-treated HEK293 cells inhibited the expression of the IRE1/XBP1 ERS pathway and apoptotic factors in the PS-NPs + LPS combined exposure group. N-acetyl-L-cysteine effectively blocked the activation of the IRE1/XBP1 ERS pathway, suggesting that PS-NPs-induced oxidative stress is an early event that triggers ERS. Collectively, these results confirmed that PS-NPs aggravated LPS-induced apoptosis through the oxidative stress-induced IRE1/XBP1 ERS pathway. Our study provides new insights into the health threats of PS-NPs exposed to mammals and humans.
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Affiliation(s)
- Zhe Li
- Department of Animal Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, P.R. China
| | - Tong Xu
- Department of Animal Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, P.R. China
| | - Lin Peng
- Department of Animal Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, P.R. China
| | - Xinyu Tang
- Department of Animal Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, P.R. China
| | - Qianru Chi
- Department of Animal Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, P.R. China
| | - Ming Li
- Department of Animal Ecology, College of Life and environmental Science, Wenzhou University, Wenzhou, P.R. China
| | - Shu Li
- Department of Animal Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, P.R. China
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He Y, Li Z, Xu T, Luo D, Chi Q, Zhang Y, Li S. Polystyrene nanoplastics deteriorate LPS-modulated duodenal permeability and inflammation in mice via ROS drived-NF-κB/NLRP3 pathway. Chemosphere 2022; 307:135662. [PMID: 35830933 DOI: 10.1016/j.chemosphere.2022.135662] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/04/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
The widespread occurrence of nanoplastics (NPs), has markedly affected the ecosystem and has become a global threat to animals and human health. There is growing evidence showing that polystyrene nanoparticles (PSNPs) exposure induced enteritis and the intestinal barrier disorder. Lipopolysaccharide (LPS) can trigger the inflammation burden of various tissues. Whether PSNPs deteriorate LPS-induced intestinal damage via ROS drived-NF-κB/NLRP3 pathway is remains unknown. In this study, PSNPs exposure/PSNPs and LPS co-exposure mice model were duplicated by intraperitoneal injection. The results showed that exposure to PSNPs/LPS caused duodenal inflammation and increased permeability. We evaluated the change of duodenum structure, oxidative stress parameters, inflammatory factors, and tight junction protein in the duodenum. We found that PSNPs/LPS could aggravate the production of ROS and oxidative stress in cells, activate NF-κB/NLRP3 pathway, decrease the expression tight junction proteins (ZO-1, Claudin 1, and Occludin) levels, promote inflammatory factors (TNF-α, IL-6, and IFN-γ) expressions. Duodenal oxidative stress and inflammation in PS + LPS group were more serious than those in single exposure group, which could be alleviated by NF-kB inhibitor QNZ. Collectively, the results verified that PSNPs deteriorated LPS-induced inflammation and increasing permeability in mice duodenum via ROS drived-NF-κB/NLRP3 pathway. The current study indicated the relationship and molecular mechanism between PSNPs and intestinal injury, providing novel insights into the adverse effects of PSNPs exposure on mammals and humans.
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Affiliation(s)
- Yujiao He
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Zhe Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Tong Xu
- College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Dongliu Luo
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Yiming Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China.
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Chi Q, Xu T, He Y, Li Z, Tang X, Fan X, Li S. Polystyrene nanoparticle exposure supports ROS-NLRP3 axis-dependent DNA-NET to promote liver inflammation. J Hazard Mater 2022; 439:129502. [PMID: 35868089 DOI: 10.1016/j.jhazmat.2022.129502] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 06/24/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
The widespread use of plastics and the rapid development of nanotechnology bring convenience to our lives while also increasing the environmental burden and increasing the risk of exposure of organisms to nanoparticles (NPs). While recent studies have revealed an association between nanoparticles and liver injury, the intrinsic mechanism of NP exposure-induced liver damage remains to be explored. Here, we found that polystyrene nanoparticle (PSNP) exposure resulted in a significant increase in local neutrophil infiltration and neutrophil extracellular trap (NET) formation in the liver. Analysis of a coculture system of PBNs and AML12 cells revealed that PSNP-induced NET formation positively correlates with the reactive oxygen species (ROS)-NLRP3 axis. Inhibition of ROS and genetic and pharmacological inhibition of NLRP3 in AML12 can both alleviate PSNP-induced NET formation. In turn, exposure of mice to deoxyribonuclease I (DNase Ⅰ)-coated PSNPs disassembled NET in vivo, neutrophil infiltration in the liver was reduced, the ROS-NLRP3 axis was inhibited, and the expression of cytokines was markedly decreased. Collectively, our work reveals a mechanism of NET formation in PSNP exposure-induced liver inflammation and highlights the possible role of DNase Ⅰ as a key enzyme in degrading NET and alleviating liver inflammation.
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Affiliation(s)
- Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Tong Xu
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yujiao He
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Zhe Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Xinyu Tang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Xue Fan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China.
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Tang X, Fan X, Xu T, He Y, Chi Q, Li Z, Li S. Polystyrene nanoplastics exacerbated lipopolysaccharide-induced necroptosis and inflammation via the ROS/MAPK pathway in mice spleen. Environ Toxicol 2022; 37:2552-2565. [PMID: 35833596 DOI: 10.1002/tox.23618] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/30/2022] [Accepted: 07/03/2022] [Indexed: 06/15/2023]
Abstract
Plastics are novel environmental pollutants with potential threats to the ecosystem. At least 5.25 trillion plastic particles in the environment, of which nanoplastics are <100 nm in diameter. Polystyrene nanoplastics (PS-NPs) exposure damaged the spleen's immune function. Lipopolysaccharide (LPS) induced other toxicants to damage cells and organs, triggering inflammation. However, the mechanism of PS-NPs aggravated LPS-induced spleen injury remains unclear. In this study, the PS-NPs or/and LPS mice exposure model was replicated by intraperitoneal injection of PS-NPs or/and LPS, and PS-NPs or/and LPS were exposed to RAW264.7 cells. The histopathological and ultrastructural changes of the mice spleen were observed by H&E staining and transmission electron microscope. Western Blot, qRT-PCR, and fluorescent probes staining were used to detect reactive oxygen species (ROS), oxidative stress indicators, inflammatory factors, and necroptosis-related indicators in mice spleen and RAW264.7 cells. The results showed that PS-NPs or LPS induced oxidative stress, activated the MAPK pathway, and eventually caused necroptosis and inflammation in mice spleen and RAW264.7 cells. Compared with the single treatment group, the changes in PS-NPs + LPS group were more obvious. Furthermore, ROS inhibitor N-Acetyl-L-cysteine (NAC) significantly inhibited the activation of the mitogen-activated protein kinase (MAPK) signaling pathway caused by co-treatment of PS-NPs and LPS, reducing necroptosis and inflammation. The results demonstrated that PS-NPs promoted LPS-induced spleen necroptosis and inflammation in mice through the ROS/MAPK pathway. This study increases the data on the damage of PS-NPs to the organism and expands the research ideas and clues.
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Affiliation(s)
- Xinyu Tang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Xue Fan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Tong Xu
- College of Chemistry, Jilin University, Changchun, People's Republic of China
| | - Yujiao He
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Zhe Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
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Xing P, Zhang Y, Chi Q, Li S. Zinc Alleviates Arsenic-Induced Inflammation and Apoptosis in the Head Kidney of Common Carp by Inhibiting Oxidative Stress and Endoplasmic Reticulum Stress. Biol Trace Elem Res 2022; 200:2380-2390. [PMID: 34287812 DOI: 10.1007/s12011-021-02837-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/11/2021] [Indexed: 12/31/2022]
Abstract
Arsenic (As) pollution is ubiquitous in water, which shows immunotoxicity to aquatic organisms. As an indispensable regulator of gene transcription and enzymatic modification, zinc (Zn) may play a preventive and therapeutic effect on As toxicity. The purpose of this study was to investigate the interactions of As and Zn on the head kidney of common carp Cyprinus carpio. Herein the carp were treated alone or in combination with waterborne As3+ (2.83 mg/L) and/or Zn2+ (1 mg/L). Results suggested a head kidney-toxic effect of As exposure, which was manifested by the histopathological damage of the head kidney, elevation of nuclear translocation of pro-inflammatory nuclear factor-kappa light chain enhancer of B cells (NF-κB), and blockage of the anti-oxidative nuclear factor erythroid 2-related factor 2 (Nrf2) pathway. The global activation of three endoplasmic reticulum (ER) stress pathways led to the execution of programmed cell death, including ER apoptosis mediated by C/EBP-homologous protein (CHOP), death receptor-mediated exogenous cell apoptosis, and the endogenous apoptosis executed by Caspases9. The combined application of Zn can significantly improve the histopathological damage of the head kidney, the imbalance of the antioxidant system, and the apoptosis outcomes due to ER stress. In conclusion, this study indicates that Zn has an antagonistic effect on the head kidney injury of common carp induced by sub-chronic As exposure. The results of this study provide basic data for the risk assessment of As accumulation in an aquatic environment and a reference for the use of Zn preparation in aquaculture.
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Affiliation(s)
- Pengcheng Xing
- College of International Culture and Education, Northeast Agricultural University, Harbin, 150030, China
| | - Yiming Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
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Wang Y, He Y, Hu X, Chi Q, Zhao B, Ye J, Li S. Regulating of LncRNA2264/miR-20b-5p/IL17RD axis on hydrogen sulfide exposure-induced inflammation in broiler thymus by activating MYD88/NF-κB pathway. Toxicology 2021; 467:153086. [PMID: 34979168 DOI: 10.1016/j.tox.2021.153086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/14/2021] [Accepted: 12/27/2021] [Indexed: 01/30/2023]
Abstract
Hydrogen sulfide (H2S) is an environmental pollutant. Chronic exposure to H2S can damage the immune system of birds, but the detailed mechanisms of H2S-induced thymus toxicity have not been determined. Competitive endogenous RNA (ceRNA) mechanism participates in many pathophysiological processes by regulating gene expression, including environmental pollutant-induced injury. Therefore, we investigate the specific mechanisms of ceRNA in the process of H2S-induced thymic immune damage in broiler chickens. In the current study, 120 one-day-old male Ross 308 broilers were randomly divided into two groups (n = 60 chickens/group), raising in the control chamber (0.5 ± 0.5 ppm) or H2S-exposed chamber (4.0 ± 0.5 ppm at 0-3 weeks of age and 20.0 ± 0.5 ppm at 4-6 weeks of age groups) to replicate the H2S-exposed broilers. NaHS (3 mM or 6 mM) was used to treat chicken macrophages (HD11) to establish an in vitro. Histopathology and ultrastructural changes of thymus were assessed by hematoxylin and eosin (H&E) staining and transmission electron microscopy (TEM). Gene expression profiles were analyzed by using transcriptomics. The underlying mechanisms of thymic injury were further revealed by dual luciferase reporter gene assay, qRT-PCR and Western blotting. Research results showed that H2S exposure induced an inflammatory response in thymus, with the expression of LncRNA2264 was significantly down-regulated. LncRNA2264 could competitively bind to miR-20b-5p and caused downregulation of the IL17RD. H2S could activate inflammatory factors through the LncRNA2264/miR-20b-5p/IL17RD axis. In summary, this study suggested that LncRNA2264 acted as a miR-20b-5p molecular sponge to regulate the expression of IL17RD involved in H2S exposure-induced thymic inflammation, which has positive implications for guiding the prevention and control of H2S gas poisoning in livestock housing and ensuring animal welfare.
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Affiliation(s)
- Yu Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Yujiao He
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Xueyuan Hu
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Bing Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Jingying Ye
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China.
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Chi Q, Hu X, Liu Z, Han Y, Tao D, Xu S, Li S. H 2S exposure induces cell death in the broiler thymus via the ROS-initiated JNK/MST1/FOXO1 pathway. Ecotoxicol Environ Saf 2021; 222:112488. [PMID: 34246945 DOI: 10.1016/j.ecoenv.2021.112488] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 06/28/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Hydrogen sulfide (H2S) is a common toxic gas in chicken houses that endangers the health of poultry. Harbin has a cold climate in winter, and the conflict between heat preservation and ventilation in poultry houses is obvious. In this study, we investigated the H2S content in chicken houses during winter in Harbin and found that the H2S concentration exceeded the national standard in individual chicken houses. Then, a model of H2S exposure was established in an environmental simulation chamber. We also developed a NaHS exposure model of chicken peripheral blood lymphocytes in vitro. Proteomics analysis was used to reveal the toxicology of thymus injury in broilers, the FOXO signaling pathway was determined to be significantly enriched, ROS bursts and JNK/MST1/FOXO1 pathway activation induced by H2S exposure were detected, and ROS played an important switch role in the JNK/MST1/FOXO1 pathway. In addition, H2S exposure-induced thymus cell death involved immune dysregulation. Overall, the present study adds data for H2S contents in chicken houses, provides new findings for the mechanism of H2S poisoning and reveals a new regulatory pathway in immune injury.
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Affiliation(s)
- Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Xueyuan Hu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Zhaoyi Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yanfei Han
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Dayong Tao
- College of Animal Science, Tarim University, Alar, Xinjiang Uygur Autonomous Region 843300, China
| | - Shiwen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; College of Animal Science, Tarim University, Alar, Xinjiang Uygur Autonomous Region 843300, China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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Qiu ZP, Lin L, Dai N, Li JJ, Chi Q, Liu QH, Zhu J, Zhang HH. Flavonoid extract of hawthorn (Crataegus oxyacantha L.) fruit alleviates oxidative stress, inflammation and vascular dysfunction in L-NAME-induced hypertensive rats. J BIOL REG HOMEOS AG 2021; 34:2271-2276. [PMID: 33198447 DOI: 10.23812/20-111-l] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Z P Qiu
- Department of Emergency, Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, China
| | - L Lin
- Department of Health Examination, Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, China
| | - N Dai
- Department of General Medicine, Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, China
| | - J J Li
- Department of Urology, Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, China
| | - Q Chi
- Department of Urology, Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, China
| | - Q H Liu
- Department of Urology, Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, China
| | - J Zhu
- Department of Urology, Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, China
| | - H H Zhang
- Department of Emergency, Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, China
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Chi Q, Luan Y, Zhang Y, Hu X, Li S. The regulatory effects of miR-138-5p on selenium deficiency-induced chondrocyte apoptosis are mediated by targeting SelM. Metallomics 2020; 11:845-857. [PMID: 30869711 DOI: 10.1039/c9mt00006b] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Apoptosis is a common paradigm of cell death and plays a key role in cartilage damage and selenium (Se) deficiency. Selenoproteins play major roles in determining the biological effects of Se, and are potentially involved in the pathophysiological processes in bone tissue. MicroRNAs (miRNAs) play important roles in cell proliferation, differentiation, apoptosis and tumorigenesis. Based on the preliminary results, the expression of selenoprotein M (SelM) was significantly decreased (69%) in chicken cartilage tissues with Se deficiency, and we subsequently screened and verified that SelM is one of the target genes of miR-138-5p in chicken cartilage using a dual luciferase reporter assay and real-time quantitative PCR (qRT-PCR). The expression of miR-138-5p was increased in response to Se deficiency, and the overexpression of miR-138-5p increased caspase-3, caspase-9, BAX and BAK levels, while the BCL-2 level was decreased, suggesting that miR-138-5p induced apoptosis via the mitochondrial pathway in vivo and in vitro. We explored whether oxidative stress, mitochondrial fission and fusion, and energy metabolism might trigger apoptosis to obtain an understanding of the mechanisms underlying the effects of miR-138-5p on Se deficiency-induced apoptosis in cartilage. The levels of indicators of oxidative stress, mitochondrial dynamics and energy metabolism were changed as well. This study confirmed that SelM is one of the target genes of miR-138-5p, and the overexpression of miR-138-5p induced by Se deficiency triggered oxidative stress, an imbalance in mitochondrial fission and fusion, and energy metabolism dysfunction. Therefore, miR-138-5p is involved in the mitochondrial apoptosis pathway via targeting SelM in chicken chondrocytes.
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Affiliation(s)
- Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China.
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Zheng T, Xie HH, Wu XW, Chi Q, Wang F, Yang ZH, Chen CW, Mai W, Luo SM, Song XF, Yang SM, Zhou W, Liu HY, Xu XJ, Zhou Z, Liu CY, Ding LA, Xie K, Han G, Liu HB, Wang JZ, Wang SC, Wang PG, Wang GF, Gu GS, Ren JA. [Investigation of treatment and analysis of prognostic risk on enterocutaneous fistula in China: a multicenter prospective study]. Zhonghua Wei Chang Wai Ke Za Zhi 2019; 22:1041-1050. [PMID: 31770835 DOI: 10.3760/cma.j.issn.1671-0274.2019.11.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Objective: To investigate the diagnosis and treatment for enterocutaneous fistula (ECF) in China, and to explore the prognostic factors of ECF. Methods: A multi-center cross-sectional study was conducted based on the Registration System of Chinese Gastrointestinal Fistula and Intra-Abdominal Infections to collect the clinical data of ECF patients from 54 medical centers in 22 provinces/municipalities from January 1, 2018 to December 31, 2018. The clinical data included patient gender, age, length of hospital stay, intensive care unit (ICU) admission, underlying diseases, primary diseases, direct causes of ECF, location and type of ECF, complications, treatment and outcomes. All medical records were carefully filled in by the attending physicians, and then re-examined by more than two specialists. The diagnosis of ECF was based on the clinical manifestations, laboratory/imaging findings and intraoperative exploration. Results: A total of 1521 patients with ECF were enrolled, including 1099 males and 422 females, with a median age of 55 years. The top three primary diseases of ECF were malignant tumors in 626 cases (41.2%, including 540 gastrointestinal tumors, accounting for 86.3% of malignant tumors), gastrointestinal ulcers and perforations in 202 cases (13.3%), and trauma in 157 cases (10.3%). The direct causes of ECF were mainly surgical operation in 1194 cases (78.5%), followed by trauma in 156 (10.3%), spontaneous fistula due to Crohn's disease in 92 (6.0%), radiation intestinal injury in 41 (2.7%), severe pancreatitis in 20 (1.3%), endoscopic treatment in 13 (0.9%) and 5 cases (0.3%) of unknown reasons. All the patients were divided into three groups: 1350 cases (88.7%) with simple ECF, 150 (9.9%) with multiple ECF, and 21 (1.4%) with combined internal fistula. Among the patients with simple ECF, 438 cases (28.8%) were jejuno-ileal fistula, 313 (20.6%) colon fistula, 170 (11.2%) rectal fistula, 111 (7.3%) duodenal fistula, 76 (5.0%) ileocecal fistula, 65 (4.3%) ileocolic anastomotic fistula, 55 (3.6%) duodenal stump fistula, 36 (2.4%) gastrointestinal anastomotic fistula, 36 (2.4%) esophagogastric/esophagojejunal anastomotic fistula, 29 (1.9%) gastric fistula and 21 (1.4%) cholangiopancreatiointestinal. Among all the simple ECF patients, 991 were tubular fistula and 359 were labial fistula. A total of 1146 patients finished the treatment, of whom 1061 (92.6%) were healed (586 by surgery and 475 self-healing) and 85 (7.4%) died. A total of 1043 patients (91.0%) received nutritional support therapy, and 77 (6.7%) received fistuloclysis. Infectious source control procedures were applied to 1042 patients, including 711 (62.0%) with active lavage and drainage and 331 (28.9%) with passive drainage. Among them, 841 patients (73.4%) underwent minimally invasive procedures of infectious source control (replacement of drainage tube through sinus tract, puncture drainage, etc.), 201 (17.5%) underwent laparotomy drainage, while 104 (9.1%) did not undergo any drainage measures. A total of 610 patients (53.2%) received definitive operation, 24 patients died within postoperative 30-day with mortality of 3.9% (24/610), 69 (11.3%) developed surgical site infection (SSI), and 24 (3.9%) had a relapse of fistula. The highest cure rate was achieved in ileocecal fistula (100%), followed by rectal fistula (96.2%, 128/133) and duodenal stump fistula (95.7%,44/46). The highest mortality was found in combined internal fistula (3/12) and no death in ileocecal fistula. Univariate prognostic analysis showed that primary diseases as Crohn's disease (χ(2)=6.570, P=0.010) and appendicitis/appendiceal abscess (P=0.012), intestinal fistula combining with internal fistula (χ(2)=5.460, P=0.019), multiple ECF (χ(2)=7.135, P=0.008), esophagogastric / esophagojejunal anastomotic fistula (χ(2)=9.501, P=0.002), ECF at ileocecal junction (P=0.012), non-drainage/passive drainage before the diagnosis of intestinal fistula (χ(2)=9.688, P=0.008), non-drainage/passive drainage after the diagnosis of intestinal fistula (χ(2)=9.711, P=0.008), complicating with multiple organ dysfunction syndrome (MODS) (χ(2)=179.699, P<0.001), sepsis (χ(2)=211.851, P<0.001), hemorrhage (χ(2)=85.300, P<0.001), pulmonary infection (χ(2)=60.096, P<0.001), catheter-associated infection (χ(2)=10.617, P=0.001) and malnutrition (χ(2)=21.199, P<0.001) were associated with mortality. Multivariate prognostic analysis cofirmed that sepsis (OR=7.103, 95%CI:3.694-13.657, P<0.001), complicating with MODS (OR=5.018, 95%CI:2.170-11.604, P<0.001), and hemorrhage (OR=4.703, 95%CI: 2.300-9.618, P<0.001) were independent risk factors of the death for ECF patients. Meanwhile, active lavage and drainage after the definite ECF diagnosis was the protective factor (OR=0.223, 95%CI: 0.067-0.745, P=0.015). Conclusions: The overall mortality of ECF is still high. Surgical operation is the most common cause of ECF. Complications e.g. sepsis, MODS, hemorrhage, and catheter-associated infection, are the main causes of death. Active lavage and drainage is important to improve the prognosis of ECF.
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Affiliation(s)
- T Zheng
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
| | - H H Xie
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
| | - X W Wu
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
| | - Q Chi
- Department of General Surgery, The Second Affiliated Hospital, Harbin Medical University, Harbin 150086, China
| | - F Wang
- Department of Gastrointestinal Surgery, Affiliated Beijing Tsinghua Changgung Hospital, Tsinghua University, Beijing 102218, China
| | - Z H Yang
- Department of General Surgery, The First College of Clinical Medical Science, China Three Gorges University, Hubei Yichang 443000, China
| | - C W Chen
- Department of Gastrointestinal Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - W Mai
- Department of Gastrointestinal Surgery, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - S M Luo
- Department of Emergency Trauma Surgery, The People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
| | - X F Song
- Department of Gastrointestinal Surgery, Henan Provincial People's Hospital, Medical College of Henan University, Zhengzhou 450003, China
| | - S M Yang
- Department of Gastrointestinal Surgery, The Nankai Hospital, Nankai University, Tianjin 300100, China
| | - W Zhou
- Department of General Surgery, Sir Run Run Shaw Hospital, Medicine of School, Zhejiang University, Hangzhou 310016, China
| | - H Y Liu
- Department of Emergency Surgery, The First Affiliated Hospital, Zhengzhou University, Zhengzhou 450000, China
| | - X J Xu
- Department of Pancreatic Surgery, The First Affiliated Hospital, Xinjiang Medical University, Urumqi 830054, China
| | - Z Zhou
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Division of Life Sciences And Medicine, University of Science and Technology of China, Hefei 230001, China
| | - C Y Liu
- Department of Gastrointestinal Surgery and Hernia Surgery, Ganzhou People's Hospital of Jiangxi Province, Jiangxi Ganzhou 341000, China
| | - L A Ding
- Department of Gastrointestinal Surgery, Affiliated Hospital, Qingdao University, Shandong Qingdao 266003, China
| | - K Xie
- Department of General Surgery, Chest Hospital of Nanyang City of Henan Province, Henan Nanyang 473000, China
| | - G Han
- Department of Gastrointestinal Surgery, The Second Hospital of Jilin University, Changchun 130041, China
| | - H B Liu
- Department of GeneralSurgery, The 940th Hospital, Joint Logistics Support Force of Chinese PLA, Lanzhou 730050, China
| | - J Z Wang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Gannan Medical College, Jiangxi Ganzhou 341000, China
| | - S C Wang
- Department of General Surgery, The 901th Hospital, Joint Logistic Support Force of PLA, Hefei 230031, China
| | - P G Wang
- Department of Emergency Surgery, Affiliated Hospital, Qingdao University, Shandong Qingdao 266003, China
| | - G F Wang
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
| | - G S Gu
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
| | - J A Ren
- Research Institute of General Surgery, East War Zone Hospital of PLA, Nanjing 210002, China
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11
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Hu X, Chi Q, Liu Q, Wang D, Zhang Y, Li S. Atmospheric H 2S triggers immune damage by activating the TLR-7/MyD88/NF-κB pathway and NLRP3 inflammasome in broiler thymus. Chemosphere 2019; 237:124427. [PMID: 31352103 DOI: 10.1016/j.chemosphere.2019.124427] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 07/18/2019] [Accepted: 07/20/2019] [Indexed: 06/10/2023]
Abstract
Atmospheric hydrogen sulfide (H2S) is a highly toxic air pollutant that has a negative effect on human health and animal welfare. The immunotoxicity of H2S has been explored previously, but its mechanism still needs to be clarified, especially in chickens. To further evaluate the immunotoxicity of H2S, 1-day-old broilers were recruited and exposed to atmospheric H2S for 42 days of age. Our results showed that H2S significantly reduced the thymus index and the CD4+ and CD8+ T-lymphocyte numbers and that it also changed the CD4+/CD8+ ratio. The morphological analysis showed that H2S incrassated the medulla and generated inflammatory infiltration. In addition, it caused the mitochondria to swell and the chromatin to condense, and destroyed nuclear structures were observed. We also conducted bioinformation and transcriptomic analyses to delve the mechanism of H2S toxicity in chicken thymus. We measured 172 differently expression genes (DEGs) after H2S exposure and further filtrated the DEGs that are related to inflammation and cell death that play a critical role in immune function. We concluded that H2S significantly increased IL-1β, IL-4 and IL-10 levels, whereas it downregulated IL-12 and IFN-γ. This study confirmed that H2S triggered the thymus inflammatory response and caused a Th1/Th2 imbalance. Moreover, our results demonstrated that H2S triggered the TLR-7/MyD88/NF-κB pathway to promote NLRP3 inflammasome activation. In conclusion, atmospheric H2S actives the TLR-7/MyD88/NF-κB pathway and the NLRP3 inflammasome to promote an inflammatory response, which then causes tissues damage in broiler thymus. These results provide new insights for unveiling the immunotoxic effects of H2S.
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Affiliation(s)
- Xueyuan Hu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Qingqing Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Dongxu Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Yiming Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
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12
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Wang S, Chi Q, Hu X, Cong Y, Li S. Hydrogen sulfide-induced oxidative stress leads to excessive mitochondrial fission to activate apoptosis in broiler myocardia. Ecotoxicol Environ Saf 2019; 183:109578. [PMID: 31442807 DOI: 10.1016/j.ecoenv.2019.109578] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 08/09/2019] [Accepted: 08/14/2019] [Indexed: 06/10/2023]
Abstract
Hydrogen sulfide (H2S), as an environmental gas pollutant, has harmful effects on many tissues and organs, including myocardium. However, the underlying mechanisms of H2S-induced myocardia toxicity remain poorly understood. The present study was designed to investigate the effect of H2S on myocardia injury in broilers from the perspective of apoptosis. 30 ppm H2S was administered in the broiler chamber for 2, 4 and 6 week, respectively, and the myocardial samples in control groups and H2S groups were collected immediately after euthanized broilers. Transmission electron microscope, test kits, qRT-PCR and western blot were performed. Results showed that H2S exposure decreased the activities of catalase (CAT) and total antioxidant capability (T-AOC), whereas the content of hydrogen peroxide (H2O2) and the activity of inducible nitric oxide synthase (iNOS) enhanced. Besides, we found the excessive expression of mitochondrial fission genes (Drp1 and Mff) by H2S, the dynamic balance of mitochondrial fission and fusion is destroyed. Furthermore, the levels of pro-apoptotic gene (including CytC, Cas3, Cas8, Cas9, TNF-α and Bax) increased after H2S exposure, as well as the expression level of anti-apoptotic gene bcl-2 decreased. At the same time, the activities of ATPase (including Na+-K+-ATPase, Ca2+-ATPase, Mg2+-ATPase and Ca2+-Mg2+-ATPase) weakened under H2S exposure. Therefore, we conclude that H2S induced oxidative stress and then leaded to excessive mitochondrial fission, which involved in apoptosis and damage broiler myocardia.
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Affiliation(s)
- Shuang Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Xueyuan Hu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Yimei Cong
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China; Heilingjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, PR China.
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13
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Cong Y, Chi Q, Teng X, Li S. The Protection of Selenium Against Cadmium-Induced Mitochondrial Damage via the Cytochrome P450 in the Livers of Chicken. Biol Trace Elem Res 2019; 190:484-492. [PMID: 30392018 DOI: 10.1007/s12011-018-1557-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 10/23/2018] [Indexed: 12/14/2022]
Abstract
Cadmium (Cd) is a heavy metal in natural environment and has extreme toxicity. Selenium (Se) has protective effect against heavy metal-induced injury or oxidative stress. Cytochrome P450 (CYP450) enzymes are a family of hemoproteins primarily responsible for detoxification functions. In order to investigate whether CYP450 is related to the damage of livers caused by Cd exposure, we chose forty-eight 28-day-old healthy Hailan cocks for four groups: control group, Se group, Cd group, and Se + Cd group. After 90-day treatment, euthanized for experiment. Based on an established subchronic Cd poisoning model in chicken, this experiment was designed to detect mitochondrial structure, malondialdehyde (MDA), glutathione (GSH), DNA and protein crosslink (DPC) and protein carbonyl (PCO) content, the CYP450 and b5 contents, the aminopyrine-N-demethylase (AND), erythromycin N-demethylase (ERND), aniline 4-hydroxylase (AH) and NADPH-cytochrome C reducatase (CR) activities, and mRNA expression level in the livers. The present results indicated that the MDA content, PCO content, and DPC index in Cd group were higher than those observed in other three groups. Most of the mitochondrial structure is incomplete in Cd group. The contents of CYP450 and b5 were decreased in Cd group. The activities of AND, ERND, AH, and CR got reduced after Cd exposure, as observed in CYP450 gene expression. Our results showed that CYP450 system was involved in the entire process of injury and protection. This research provides a comprehensive evaluation of the oxidative stress effects of Cd related to CYP450 in chicken.
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Affiliation(s)
- Yimei Cong
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xiaohua Teng
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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14
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Chi Q, Wang D, Hu X, Li S, Li S. Hydrogen Sulfide Gas Exposure Induces Necroptosis and Promotes Inflammation through the MAPK/NF- κB Pathway in Broiler Spleen. Oxid Med Cell Longev 2019; 2019:8061823. [PMID: 31467636 PMCID: PMC6701317 DOI: 10.1155/2019/8061823] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 03/28/2019] [Accepted: 06/03/2019] [Indexed: 12/20/2022]
Abstract
Hydrogen sulfide (H2S) is one of the main pollutants in the atmosphere, which is a serious threat to human health. The decomposition of sulfur-containing organics in chicken houses could produce a large amount of H2S, thereby damaging poultry health. In this study, one-day-old broilers were selected and exposed to 4 or 20 ppm of H2S gas (0-3 weeks: 4 ± 0.5 ppm, 4-6 weeks: 20 ± 0.5 ppm). The spleen samples were collected immediately after the chickens were euthanized at 2, 4, and 6 weeks. The histopathological and ultrastructural observations showed obvious necrosis characteristics of H2S-exposed spleens. H2S exposure suppressed GSH, CAT, T-AOC, and SOD activities; increased NO, H2O2, and MDA content and iNOS activity; and induced oxidative stress. ATPase activities and the expressions of energy metabolism-related genes were significantly decreased. Also, the expressions of related necroptosis (RIPK1, RIPK3, MLKL, TAK1, TAB2, and TAB3) were significantly increased, and the MAPK pathway was activated. Besides, H2S exposure activated the NF-κB classical pathway and induced TNF-α and IL-1β release. Taken together, we conclude that H2S exposure induces oxidative stress and energy metabolism dysfunction; evokes necroptosis; activates the MAPK pathway, eventually triggering the NF-κB pathway; and promotes inflammatory response in chicken spleens.
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Affiliation(s)
- Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Dongxu Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Xueyuan Hu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Shiping Li
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
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15
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Wang D, Zhang Y, Chi Q, Hu X, Li S, Li S. Ammonia exposure induced abnormal expression of cytokines and heat shock proteins via glucose metabolism disorders in chicken neutrophils. Environ Sci Pollut Res Int 2019; 26:10529-10536. [PMID: 30767103 DOI: 10.1007/s11356-019-04516-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 02/05/2019] [Indexed: 06/09/2023]
Abstract
Ammonia (NH3) is a highly irritant, alkaline gas. Atmospheric emission of NH3 was recognized as an environmental challenge. As a global issue, the NH3 emission survey with spatially detailed information demonstrated that the sources of atmospheric NH3 include agriculture (livestock wastes, fertilizers) and some industrial activities. As an environmental pollution, excessive NH3 exposure can induce many bird dysfunction. Neutrophils respond to multiple invading pathogens through different mechanisms. In order to investigate the effect of NH3 exposure on broilers' neutrophil, 1-day-old broilers were treated with/without NH3 for 28 days. We extracted neutrophils from peripheral blood of chicken with/without NH3 exposure and subsequently stimulated with PMA. Changes of cytokines and inflammatory bodies, heat shock proteins (HSPs), and glucose metabolism of neutrophil were examined in both cases. We not only explored that the index associated with inflammation changed due to NH3 exposure but also observed the status of neutrophils which was treated with PMA stimulation. After NH3 exposure, IL-1β and IL-6 were significantly increased on broilers neutrophil. Inflammatory-related factors (NLRP3, ASC, and caspase-1) were significantly elevated. The mRNA expression of HSP70 and HSP90 was increased significantly. All glucose metabolism indicators were reduced. In summary, we concluded that NH3 enhanced inflammation and disrupted glucose metabolism, and increased the expression of HSPs and inflammatory factors. In addition, the sensitivity of neutrophils to exogenous stimuli was diminished. This information can not only be used to evaluate the damage of NH3-spiked neutrophils to chickens, but also provide clues for human health pathophysiology caused by excess NH3, providing valuable information for NH3 risk management.
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Affiliation(s)
- Dongxu Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Yiming Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Xueyuan Hu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Shiping Li
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
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16
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Wan N, Xu Z, Chi Q, Hu X, Pan T, Liu T, Li S. microRNA-33-3p involved in selenium deficiency-induced apoptosis via targeting ADAM10 in the chicken kidney. J Cell Physiol 2019; 234:13693-13704. [PMID: 30605240 DOI: 10.1002/jcp.28050] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 12/03/2018] [Indexed: 12/11/2022]
Abstract
Selenium (Se) deficiency induces typical clinical and pathological changes and causes various pathological responses at the molecular level in several different chicken organs; the kidney is one of the target organs of Se deficiency. To explore the mechanisms that underlie the effects of microRNA-33-3p (miR-33-3p) on Se deficiency-induced kidney apoptosis, 60 chickens were randomly divided into two groups (30 chickens per group). We found that Se deficiency increased the expression of miR-33-3p in the chicken kidney. A disintegrin and metalloprotease domain 10 (ADAM10) was verified to be a target of miR-33-3p in the chicken kidney. The overexpression of miR-33-3p decreased the expression levels of β-catenin, cyclinD1, T-cell factor (TCF), c-myc, survivin, and Bcl-2; it increased the expression levels of E-cadherin, Bak, Bax, and caspase-3; and it increased the number of chicken kidney cells in the G0/G1 phase. In addition, Se deficiency caused the ultrastructure of the kidney to develop apoptotic characteristics. The results of flow cytometry analysis and AO/EB staining showed that the number of apoptotic chicken kidney cells increased in the miR-33-3p mimic group. All these results suggest that Se deficiency-induced cell cycle arrest and apoptosis in vivo and in vitro in the chicken kidney via the regulation of miR-33-3p, which targets ADAM10.
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Affiliation(s)
- Na Wan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Zhe Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Xueyuan Hu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - TingRu Pan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Tianqi Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
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17
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Hu X, Chi Q, Wang D, Chi X, Teng X, Li S. Hydrogen sulfide inhalation-induced immune damage is involved in oxidative stress, inflammation, apoptosis and the Th1/Th2 imbalance in broiler bursa of Fabricius. Ecotoxicol Environ Saf 2018; 164:201-209. [PMID: 30118953 DOI: 10.1016/j.ecoenv.2018.08.029] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 08/05/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
Hydrogen sulfide (H2S) is widely accepted to be a signaling molecule that exhibits some potentially beneficial therapeutic effects at physiological concentrations. At elevated levels, H2S is highly toxic and has a negative effect on human health and animal welfare. Studies have shown that H2S exposure induces an immune function in mice, but there are few studies of the effect of continuous H2S exposure on immune organs in poultry. In this study, one-day-old broilers were selected and exposed to 4 or 20 ppm of H2S gas for 14, 28 and 42 days of age. After exposure, the bursa of Fabricius (BF) was harvested. The results showed that continuous H2S exposure reduced the body weight, abdominal fat percentage, and antibody titer in broilers. H2S exposure also decreased mRNA expression of IgA, IgM and IgG in the broiler BF. A histological study revealed obvious nuclear debris, and a few vacuoles in the BF, and an ultrastructural study revealed mitochondrial and nuclear damage to BF cells after H2S exposure for 42 d. Terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL) assay suggested H2S exposure remarkably increased the number of TUNEL positive nuclei and significantly increased apoptotic index. The expression of apoptotic genes also confirmed that H2S inhalation damaged the broiler BF. Increased cytokines and reduced antioxidant responses were detected in the BF after exposure to H2S. Cytokines promoted inflammation and caused a Th1/Th2 imbalance. We suggest that continuous H2S intoxication triggers oxidative stress, inflammation, apoptosis and a Th1/Th2 imbalance in the BF, leading to immune injury in broilers.
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Affiliation(s)
- Xueyuan Hu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Dongxu Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Xin Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Xiaohua Teng
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China.
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18
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Chi Q, Chi X, Hu X, Wang S, Zhang H, Li S. The effects of atmospheric hydrogen sulfide on peripheral blood lymphocytes of chickens: Perspectives on inflammation, oxidative stress and energy metabolism. Environ Res 2018; 167:1-6. [PMID: 30005195 DOI: 10.1016/j.envres.2018.06.051] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/11/2018] [Accepted: 06/26/2018] [Indexed: 06/08/2023]
Abstract
Excessive hydrogen sulfide (H2S) affects poultry health. Exposure to air pollution induces inflammation, oxidative stress, energy metabolism dysfunction and adverse health effects. However, few detailed studies have been conducted on the molecular mechanisms of H2S-induced injury in poultry. To understand how H2S drives its adverse effects on chickens, twenty-four 14-day-old chickens were randomly divided into two groups. The chickens in the control group were raised in a separate chamber without H2S, and the chickens in the treatment group were exposed to 30 ppm H2S. After 14 days of exposure, peripheral blood samples were taken and the lymphocytes were extracted to detect inflammation, oxidative stress and energy metabolism in broilers. Overall, an increase in the inflammatory response was detected in the peripheral blood lymphocytes following H2S exposure compared to the control group, and the expression levels of the heat shock proteins (HSPs) and the transcription factors nuclear factor κB (NF-κB), cyclooxygenase 2 (COX-2) and inducible nitric oxide synthase (iNOS) were up-regulated in the H2S group, which further suggested that H2S induced an inflammatory response via the NF-κB pathway. Because of the activation of NF-κB, which is a major regulator of oxidative stress, we also observed that reactive oxygen species (ROS) production was elevated under H2S exposure. In addition, we presumed that energy metabolism might be damaged due to the increased ROS production, and we found that H2S down-regulated the expression levels of energy metabolism-related genes, which indicated the occurrence of energy metabolism dysfunction. Altogether, this study suggests that exposure to excessive atmospheric H2S induces an inflammatory response, oxidative stress and energy metabolism dysfunction, providing a reference for comparative medicine.
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Affiliation(s)
- Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Xin Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Xueyuan Hu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Shuang Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Hongfu Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin 150030, China.
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19
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Liang XX, Liang LD, Zhang YY, Gao JB, Zhang YG, Liu X, Chi Q. [Comparative study on image quality of third-generation dual-source CT pulmonary angiography combined with advanced modeled iterative reconstruction]. Zhonghua Yi Xue Za Zhi 2018; 98:1024-1027. [PMID: 29690714 DOI: 10.3760/cma.j.issn.0376-2491.2018.13.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Objective: To quantitatively evaluate the quality of advanced modeled iterative reconstruction (ADMIRE) combined with 70 kVp and linear blending images in low dose dual energy (70 kVp/sn150 kVp) pulmonary angiography. Methods: A total of 74 cases with normal BMI underwent dual-source CT dual-energy pulmonary angiography with small amount of contrast medium (30 ml) from 2015 to 2017 from the First Affiliated Hospital of Zhengzhou University were randomly assigned to protocol Ⅰ(100 kVp/sn140 kVp) or protocol Ⅱ(70 kVp/sn150 kVp). 70 kVp+ ADMIRE (group 1), linear blending+ ADMIRE (group 2), 100 kVp+ SAFIRE (group 3) images were obtained. CT value and noise standard deviation (SD) of pulmonary arteries were measured in pulmonary trunk artery, left pulmonary artery and left superior pulmonary artery, then SNR and CNR were calculated. Radiation dose parameters (CTDIvol, DLP) were recorded. Results: CT values of pulmonary artery of group 1 were significantly higher than those in group 2 and 3 (both P<0.05). In group 2, SD value of pulmonary artery was lower than that of group 1 and 3(both P<0.05). SD value of pulmonary trunk and left pulmonary artery in group 1 was higher than that in group 3 (P<0.05), SD value of left superior pulmonary artery had no significant difference between group 1 and group 3 (P>0.05). SNR and CNR value in group 1 and group 2 had no statistical difference, but they were both higher than that in group 3 (both P<0.05). The effective dose of protocolⅠwas 46% lower than protocol Ⅱ. Conclusion: ADMIRE combined with 70 kVp and linear blending images are better than SAFIRE combined with 100 kVp images, and radiation dose is reduced.70 kVp/sn150 kVp with small amount of contrast medium (30 ml) is a feasible dual energy pulmonary artery scanning protocol.
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Affiliation(s)
- X X Liang
- Department of Radiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
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Chi Q, Liu T, Sun Z, Tan S, Li S, Li S. Involvement of mitochondrial pathway in environmental metal pollutant lead-induced apoptosis of chicken liver: perspectives from oxidative stress and energy metabolism. Environ Sci Pollut Res Int 2017; 24:28121-28131. [PMID: 29019088 DOI: 10.1007/s11356-017-0411-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 10/03/2017] [Indexed: 06/07/2023]
Abstract
This study aimed to investigate the possible mechanisms of environmental metal pollutant lead (Pb)-induced apoptosis in chicken. Forty 8-day-old healthy chickens were randomly assigned to two groups (n = 20/group) after raising standard commercial diet and drinking water for 1 week: including control group and Pb group ((CH3COO)2Pb 350 mg/L of drinking water); the chickens were given euthanasia and collected livers at 90 days. A significant increase of apoptosis rate were found in Pb group and Pb induced obvious ultrastructural changes of chicken liver. The mRNA levels of glycometabolism key enzymes were significantly lower in Pb group than those in controls. Higher levels of malondialdehyde (MDA) and nitric oxide (NO) were observed in Pb group; the activities of antioxidant enzymes and ATPases were significantly lower in Pb group than those in controls, while the inducible nitric oxide synthase (iNOS) activity was on the contrary. The mRNA and protein levels of pro-apoptotic genes were all lower in Pb group than those in controls. Altogether, Pb-induced mitochondrial swelling and nuclear chromatin condensation, oxidative stress, energy metabolism disorder, thereby lead to apoptosis via mitochondrial pathway in chicken liver, suggesting that Pb-induced mitochondrial pathway apoptosis plays an important role in the mechanisms of Pb cytotoxicity to chicken liver.
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Affiliation(s)
- Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Tianqi Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Zhepeng Sun
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Siran Tan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Shiping Li
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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Tan S, Chi Q, Liu T, Sun Z, Min Y, Zhang Z, Li S. Alleviation Mechanisms of Selenium on Cadmium-Spiked Neutrophil Injury to Chicken. Biol Trace Elem Res 2017; 178:301-309. [PMID: 28064415 DOI: 10.1007/s12011-016-0924-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 12/25/2016] [Indexed: 01/10/2023]
Abstract
To determine the negative effects of cadmium (Cd) exposure and the protective role of selenium (Se) on Cd-spiked neutrophils of chicken, forty-eight 28-day-old Isa Brown male chickens were divided randomly into four groups. Group I (control group) was fed with the basic diet containing 0.2 mg/kg Se. Group II (Se-treated group) was fed with the basic diet supplemented with Na2SeO3, and the total Se content was 2 mg/kg. Group III (Se/Cd-treated group) was fed with the basic diet supplemented with Na2SeO3; the total Se content was 2 mg/kg and supplemented with 150 mg/kg CdCl2. Group IV (Cd-treated group) was fed with the basic diet supplemented with 150 mg/kg CdCl2. Analyses of inflammatory factors, cytokines, and heat shock protein (Hsp) messenger RNA (mRNA) expression were detected by real-time PCR (RT-PCR). Additionally, we evaluated the phagocytic rate of neutrophils in peripheral blood. First, we observed that Cd significantly induced the mRNA expression levels of inflammatory factors NF-κB, iNOS, COX-2, and TNF-α, while Se/Cd treatment reduced their mRNA expression, although these expression levels remained higher than that of the control group. In addition, the mRNA expression levels of cytokines (IL-2, IL-4, and IL-10) for the Se-treated group exhibited significant differences between the Se/Cd-treated group and the Cd-treated group. Furthermore, the mRNA expression levels of Hsps demonstrated that the Se/Cd-treated group and the Cd-treated group were significantly higher (P < 0.05) than the control group and the Se-treated group. These results demonstrated that Se presented partial protection on Cd-spiked neutrophils of chicken with Hsps being involved in the process of the Cd-spiked toxic effects in chicken peripheral blood neutrophils.
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Affiliation(s)
- Siran Tan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Qianru Chi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Tianqi Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Zhepeng Sun
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yahong Min
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Ziwei Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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Yao XK, Pan ZP, Li Y, Lun YZ, Chi Q, Jiang SJ, Wang F, Sui W. Downregulation of SWI5 and CTC1 genes: hepatitis B virus DNA polymerase transactivated protein 1-mediated inhibition of DNA repair. Acta Virol 2016; 60:190-5. [PMID: 27265469 DOI: 10.4149/av_2016_02_190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hepatitis B virus (HBV) DNA polymerase transactivated protein 1 (HBVDNAPTP1) is a novel protein upregulated by HBV DNA polymerase, which has been screened by suppression subtractive hybridization technique (SSH) (GenBank Acc. No. AY450389). A vector pcDNA3.1 (-)/myc-His A-HBVDNAPTP1 was constructed and used to transfect acute monocytic leukemia cell line THP-1. HBVDNAPTP1 expression was detected by Western blot analysis in the cells. A cDNA library of genes downregulated by HBVDNAPTP1 in THP-1 cells was made in pGEM-T Easy using SSH. The cDNAs were sequenced and analyzed with BLAST search against the sequences in GenBank. Some sequences, such as DNA repair protein SWI5 homolog (SWI5) and CTS telomere maintenance complex component 1 (CTC1), might be involved in DNA repair. Protein expression of SWI5 and CTC1 was identified by Western blot in THP-1 cells. HBVDNAPTP1 could downregulate the expression of SWI5 and CTC1 at translation level.
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Li X, Chen Y, Chi Q, Hu X, Xu X, Zhang Z, Qiu M, Zheng K. miRNAs are required for the terminal differentiation of white matter astrocytes in the developing CNS. Neuroscience 2015; 312:99-107. [PMID: 26556063 DOI: 10.1016/j.neuroscience.2015.11.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 10/16/2015] [Accepted: 11/04/2015] [Indexed: 11/30/2022]
Abstract
While the regulation of the neurogenesis and oligodendrogenesis by microRNAs has been intensively studied, little is known about the role of microRNAs (miRNAs) in the development of astrocytes. Here, we report that microRNAs play an essential role in the differentiation and maturation of white matter astrocytes in mouse spinal cord tissues. In glial fibrillary acidic protein (GFAP)/Dicer conditional mutants, the initial generation of astrocyte progenitor cells was normal in the spinal cord. However, there was a much reduced number of GFAP+ astrocytes with shorter processes in the white matter of mutant tissues. In contrast, the expression of gray matter protoplasmic astrocyte marker was not affected. Together, our studies indicated that miRNAs are required for the differentiation and morphological maturation of white matter fibrous astrocytes in the developing spinal cord.
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Affiliation(s)
- X Li
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, Hangzhou Normal University, Hangzhou, Zhejiang 310029, China
| | - Y Chen
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, Hangzhou Normal University, Hangzhou, Zhejiang 310029, China
| | - Q Chi
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, Hangzhou Normal University, Hangzhou, Zhejiang 310029, China
| | - X Hu
- Department of Anatomical Sciences and Neurobiology, University of Louisville, Louisville, KY 40292, USA
| | - X Xu
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, Hangzhou Normal University, Hangzhou, Zhejiang 310029, China
| | - Z Zhang
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, Hangzhou Normal University, Hangzhou, Zhejiang 310029, China
| | - M Qiu
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, Hangzhou Normal University, Hangzhou, Zhejiang 310029, China; Department of Anatomical Sciences and Neurobiology, University of Louisville, Louisville, KY 40292, USA.
| | - K Zheng
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, Hangzhou Normal University, Hangzhou, Zhejiang 310029, China.
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Ding X, Wang Y, Ma X, Guo H, Yan X, Chi Q, Li J, Hou Y, Wang C. Expression of HMGA2 in bladder cancer and its association with epithelial-to-mesenchymal transition. Cell Prolif 2014; 47:146-51. [PMID: 24571540 DOI: 10.1111/cpr.12096] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 11/05/2013] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES High mobility group protein2 (HMGA2) and epithelial-to-mesenchymal transition are both related to progress of bladder cancer, however, the relationship between HMGA2, E-cadherin and vimentin in bladder cancer is not yet known. Thus, this study has examined expression of HMGA2, E-cadherin and vimentin in bladder cancer and investigated their relationship. MATERIALS AND METHODS The 5637 bladder cancer cell line and SV-HUC-1 normal uroepithelial cells were used to study expression of HMGA2, E-cadherin and vimentin using RT-PCR and western blotting. Paraffin wax-embedded bladder cancer tissues were used to study protein expression using immunohistochemistry and χ(2) analysis and Kendall's correlation were utilized statistical methods. RESULTS Overexpression of HMGA2 was associated with down-regulation of E-cadherin and up-regulation of vimentin in the 5637 bladder cancer line. A total of 49 paraffin wax-embedded tissues of transitional cell bladder cancer were used. Positive expression levels of HMGA2 protein and vimentin were 41 and 43% in bladder tissues, respectively. No expression of E-cadherin was found in 43%. Expression of HMGA2, loss of E-cadherin and expression of vimentin are all significantly correlated with bladder cancer grade and stage. Loss of E-cadherin and expression of vimentin both correlated with recurrence of the bladder cancer. CONCLUSIONS Expression of HMGA2 was closely associated with occurrence of epithelial-to-mesenchymal transition. Expression of HMGA2, loss of E-cadherin and expression of vimentin may indicate high degree malignancy of bladder cancer. Loss of E-cadherin expression and positive expression of vimentin may predict recurrence of bladder cancer.
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Affiliation(s)
- X Ding
- Department of Radiology, First Hospital of Jilin University, Changchun, 130021, China
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Chi Q, Liu Z, Li Y, Yang J, Chen Z, Yue C, Luo J, Yin H. Development of a Real-Time PCR Assay for Detection and Quantification ofAnaplasma ovisInfection. Transbound Emerg Dis 2013; 60 Suppl 2:119-24. [DOI: 10.1111/tbed.12139] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Indexed: 12/01/2022]
Affiliation(s)
- Q. Chi
- State Key Laboratory of Veterinary Etiological Biology; Key Laboratory of Grazing Animal Diseases MOA; Key Laboratory of Veterinary Parasitology of Gansu Province; Lanzhou Veterinary Research Institute; Chinese Academy of Agricultural Sciences; Lanzhou China
- College of Veterinary Medicine; Xinjiang Agricultural University; Urumqi China
| | - Z. Liu
- State Key Laboratory of Veterinary Etiological Biology; Key Laboratory of Grazing Animal Diseases MOA; Key Laboratory of Veterinary Parasitology of Gansu Province; Lanzhou Veterinary Research Institute; Chinese Academy of Agricultural Sciences; Lanzhou China
| | - Y. Li
- State Key Laboratory of Veterinary Etiological Biology; Key Laboratory of Grazing Animal Diseases MOA; Key Laboratory of Veterinary Parasitology of Gansu Province; Lanzhou Veterinary Research Institute; Chinese Academy of Agricultural Sciences; Lanzhou China
| | - J. Yang
- State Key Laboratory of Veterinary Etiological Biology; Key Laboratory of Grazing Animal Diseases MOA; Key Laboratory of Veterinary Parasitology of Gansu Province; Lanzhou Veterinary Research Institute; Chinese Academy of Agricultural Sciences; Lanzhou China
| | - Z. Chen
- State Key Laboratory of Veterinary Etiological Biology; Key Laboratory of Grazing Animal Diseases MOA; Key Laboratory of Veterinary Parasitology of Gansu Province; Lanzhou Veterinary Research Institute; Chinese Academy of Agricultural Sciences; Lanzhou China
| | - C. Yue
- College of Veterinary Medicine; Xinjiang Agricultural University; Urumqi China
| | - J. Luo
- State Key Laboratory of Veterinary Etiological Biology; Key Laboratory of Grazing Animal Diseases MOA; Key Laboratory of Veterinary Parasitology of Gansu Province; Lanzhou Veterinary Research Institute; Chinese Academy of Agricultural Sciences; Lanzhou China
| | - H. Yin
- State Key Laboratory of Veterinary Etiological Biology; Key Laboratory of Grazing Animal Diseases MOA; Key Laboratory of Veterinary Parasitology of Gansu Province; Lanzhou Veterinary Research Institute; Chinese Academy of Agricultural Sciences; Lanzhou China
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Haiss W, Albrecht T, van Zalinge H, Higgins SJ, Bethell D, Höbenreich H, Schiffrin DJ, Nichols RJ, Kuznetsov AM, Zhang J, Chi Q, Ulstrup J. Single-Molecule Conductance of Redox Molecules in Electrochemical Scanning Tunneling Microscopy. J Phys Chem B 2007; 111:6703-12. [PMID: 17497912 DOI: 10.1021/jp068692m] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Experimental data and theoretical notions are presented for 6-[1'-(6-mercapto-hexyl)-[4,4']bipyridinium]-hexane-1-thiol iodide (6V6) "wired" between a gold electrode surface and tip in an in situ scanning tunneling microscopy configuration. The viologen group can be used to "gate" charge transport across the molecular bridge through control of the electrochemical potential and consequently the redox state of the viologen moiety. This gating is theoretically considered within the framework of superexchange and coherent two-step notions for charge transport. It is shown here that the absence of a maximum in the Itunneling versus electrode potential relationship can be fitted by a "soft" gating concept. This arises from large configurational fluctuations of the molecular bridge linked to the gold contacts by flexible chains. This view is incorporated in a formalism that is well-suited for data analysis and reproduces in all important respects the 6V6 data for physically sound values of the appropriate parameters. This study demonstrates that fluctuations of isolated configurationally "soft" molecules can dominate charge transport patterns and that theoretical frameworks for compact monolayers may not be directly applied under such circumstances.
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Affiliation(s)
- W Haiss
- Centre for Nanoscale Science, Chemistry Department, University of Liverpool, Liverpool L69 7ZD, United Kingdom
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Zhang J, Chi Q, Kuznetsov AM, Hansen AG, Wackerbarth H, Christensen HEM, Andersen JET, Ulstrup J. Electronic Properties of Functional Biomolecules at Metal/Aqueous Solution Interfaces. J Phys Chem B 2002. [DOI: 10.1021/jp0129941] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Zhang
- Building 207, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark, and The A.N. Frumkin Institute of Electrochemistry of the Russian Academy of Sciences, Leninskij Prospect 31, 117071 Moscow, Russia
| | - Q. Chi
- Building 207, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark, and The A.N. Frumkin Institute of Electrochemistry of the Russian Academy of Sciences, Leninskij Prospect 31, 117071 Moscow, Russia
| | - A. M. Kuznetsov
- Building 207, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark, and The A.N. Frumkin Institute of Electrochemistry of the Russian Academy of Sciences, Leninskij Prospect 31, 117071 Moscow, Russia
| | - A. G. Hansen
- Building 207, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark, and The A.N. Frumkin Institute of Electrochemistry of the Russian Academy of Sciences, Leninskij Prospect 31, 117071 Moscow, Russia
| | - H. Wackerbarth
- Building 207, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark, and The A.N. Frumkin Institute of Electrochemistry of the Russian Academy of Sciences, Leninskij Prospect 31, 117071 Moscow, Russia
| | - H. E. M. Christensen
- Building 207, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark, and The A.N. Frumkin Institute of Electrochemistry of the Russian Academy of Sciences, Leninskij Prospect 31, 117071 Moscow, Russia
| | - J. E. T. Andersen
- Building 207, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark, and The A.N. Frumkin Institute of Electrochemistry of the Russian Academy of Sciences, Leninskij Prospect 31, 117071 Moscow, Russia
| | - J. Ulstrup
- Building 207, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark, and The A.N. Frumkin Institute of Electrochemistry of the Russian Academy of Sciences, Leninskij Prospect 31, 117071 Moscow, Russia
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Farver O, Zhang J, Chi Q, Pecht I, Ulstrup J. Deuterium isotope effect on the intramolecular electron transfer in Pseudomonas aeruginosa azurin. Proc Natl Acad Sci U S A 2001; 98:4426-30. [PMID: 11287635 PMCID: PMC31851 DOI: 10.1073/pnas.071043798] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Intramolecular electron transfer in azurin in water and deuterium oxide has been studied over a broad temperature range. The kinetic deuterium isotope effect, k(H)/k(D), is smaller than unity (0.7 at 298 K), primarily caused by the different activation entropies in water (-56.5 J K(-1) mol(-1)) and in deuterium oxide (-35.7 J K(-1) mol(-1)). This difference suggests a role for distinct protein solvation in the two media, which is supported by the results of voltammetric measurements: the reduction potential (E(0')) of Cu(2+/+) at 298 K is 10 mV more positive in D(2)O than in H(2)O. The temperature dependence of E(0') is also different, yielding entropy changes of -57 J K(-1) mol(-1) in water and -84 J K(-1) mol(-1) in deuterium oxide. The driving force difference of 10 mV is in keeping with the kinetic isotope effect, but the contribution to DeltaS from the temperature dependence of E(0') is positive rather than negative. Isotope effects are, however, also inherent in the nuclear reorganization Gibbs free energy and in the tunneling factor for the electron transfer process. A slightly larger thermal protein expansion in H(2)O than in D(2)O (0.001 nm K(-1)) is sufficient both to account for the activation entropy difference and to compensate for the different temperature dependencies of E(0'). Thus, differences in driving force and thermal expansion appear as the most straightforward rationale for the observed isotope effect.
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Affiliation(s)
- O Farver
- Institute of Analytical and Pharmaceutical Chemistry, The Royal Danish School of Pharmacy, DK-2100 Copenhagen Ø, Denmark
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Andersen J, Zhang JD, Chi Q, Hansen A, Nielsen J, Friis E, Ulstrup J, Boisen A, Jensenius H. In situ scanning probe microscopy and new perspectives in analytical chemistry. Trends Analyt Chem 1999. [DOI: 10.1016/s0165-9936(99)00162-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chi Q, Goji T, Yoskiaki K. [Evaluation of the effect of aging on the retinal nerve fiber layer thickness using scanning laser polarimeter]. Zhonghua Yan Ke Za Zhi 1998; 34:199-201. [PMID: 11877189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
OBJECTIVE To study age-related effects on the retinal nerve fiber layer thickness (RNFLT). METHODS 75 eyes of 75 normal volunteers were recruited. Their ages ranged from 20 to 66 years. They were divided into five age groups of 15 subjects each. We measured each subject's RNFLT using scanning laser polarimeter. The mean RNFLT within the 1.5 disc diameter ring around the optic nerve papilla and its four quadrants (superior, temporal, inferior and nasal) was calculated. RESULTS The mean +/- SD of RNFLT was 76.4 +/- 7.50 microm, 71.5 +/- 7.3 microm, 72.1 +/- 3.9 microm, 66.7 +/- 7.2 microm and 67.4 +/- 8.5 microm, respectively. CONCLUSIONS The RNFLT decreases with aging in the normal healthy eye.
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Affiliation(s)
- Q Chi
- Department of Ophthalmology, First Hospital, Beijing Medical University, Beijing 100034
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Kono Y, Chi Q, Tomita G, Yamamoto T. ["Neural capacity" index correlates with neuroretinal rim area of glaucomatous eyes better than light sensitivity]. Nippon Ganka Gakkai Zasshi 1996; 100:223-9. [PMID: 8900588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We compared the relationship between the neuroretinal rim area and the neural capacity (NC) index of high-pass resolution perimetry (HRP) and the differential light sensitivity (DLS) of a Humphrey Field Analyzer (HFA). Subjects were 40 eyes of 27 normal-tension glaucoma (NTG) patients. The total rim area and the area of its temporal, superior, nasal, and inferior quadrants were determined with a confocal laser tomographic scanner. Mean local NC (MLNC) was calculated using the resolution thresholds corresponding to the quadrant. Mean local DLS (MLDLS) was calculated using the data of program 30-2 of HFA. In a total of 40 eyes, NC and mean deviation were significantly correlated with the total rim area (rs = 0.422, p < 0.01: rs = 0.360, p < 0.05, respectively). NC was also significantly correlated with the total rim area in 19 eyes with early visual field changes, but not in 21 eyes with advanced changes. MLNC was significantly correlated with the superior and inferior rim areas, and MLDLS was significantly correlated with the inferior rim area. These results indicate that indices of HRP may relate to glaucomatous optic disc changes better than those of HFA in NTG, especially in patients with early visual field defects.
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Affiliation(s)
- Y Kono
- Department of Ophthalmology, Gifu University School of Medicine, Japan
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Yamamoto T, Chi Q, Kitazawa Y. [Interaction between a prostaglandin F2 alpha derivative, UF-021, and pilocarpine in ocular hypotensive therapy]. Nippon Ganka Gakkai Zasshi 1994; 98:202-5. [PMID: 8109466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We investigated the ocular hypotensive effect of concomitant use of pilocarpine and UF-021, a prostaglandin-related compound, in 10 cases (20 eyes) of primary open-angle glaucoma or ocular hypertension. Following a 2- to 4-week-washout of all anti-glaucoma medication, 0.12% UF-021 was instilled twice daily into both eyes of 5 patients and 1% pilocarpine four times daily in 10 eyes of the remaining 5 patients for 2 weeks. Then both eye-drops were used concomitantly for the subsequent 2 weeks. Intraocular pressure (IOP) measurement and slit-lamp examination were carried out from one hour prior to the instillation to 4 hours after the instillation at the end of the washout period, the single-use period, and the concomitant-use period. Although no significant difference was found between IOPs of the single-use and concomitant use periods at each measurement time point, a significant difference was found between them when all the measured IOP values were pooled. No changes in episcleral venous pressure nor adverse effects were noted. We concluded that the concomitant use of pilocarpine and UF-021 causes an additive ocular hypotensive effect in clinical settings.
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Affiliation(s)
- T Yamamoto
- Department of Ophthalmology, Gifu University School of Medicine
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Chi Q, Guo J, Dang Q. [Thin layer chromatography and extractive technology of Panax japonicum C.A. Mey. var. major (Burk.) C. Y. Wu et K. M. Feng growing in Qingba Mountain Area]. Zhongguo Zhong Yao Za Zhi 1992; 17:478-80, 511. [PMID: 1482533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Chemical components of the root, stem and leaves of Panax japonicum var. major were compared with those of Radix ginseng and Radix notoginseng by TLC. The results showed that the total saponin of the root Panax japonicum var. major was closer to that of Radix ginseng and the total saponin of its stem and leaves was similar to Radix notoginseng. A better extractive technology was obtained after isolating and purifying the whole herb of Panax japonicum var. major by ethyl alcohol at different concentrations. The components were compared by TLC. The results showed that with 60% ethyl alcohol the yield of the total extract was 17.15%.
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Affiliation(s)
- Q Chi
- Shaanxi Academy of Traditional Chinese Medicine and Materia Medica, Xian
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Chi Q, Nie HS, Dang QP. [Ultrafiltration properties in preparing injections of Chinese medicinal herbs using a J-48 ultrafilter]. Zhongguo Zhong Yao Za Zhi 1989; 14:601-3, 639. [PMID: 2597324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Four injections of single Chinese medicinal herbs and 3 medical solutions of pure substances showing impurities were prepared by J-48 ultrafilter. The retention rate of effective compounds and the clearance rate of impurity of each injection and solution before and after ultrafiltration were examined by a UV 265-FW Ultraviolet-spectrophotometer (Shimadzu, Japan).
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