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Guo WY, Lu DY, Guan ZZ, Zheng L, Chen SS, Liu T. Periploca forrestii Schltr. ameliorate liver injury caused by fluorosis in rat. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 270:115813. [PMID: 38113798 DOI: 10.1016/j.ecoenv.2023.115813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/02/2023] [Accepted: 12/09/2023] [Indexed: 12/21/2023]
Abstract
To investigate the impact of the ethanoic fractions of Periploca forrestii Schltr. (P. forrestii) in ameliorating the liver injury caused by fluoride ingestion and to explore the potential mechanisms. Initially, an in vitro fluorosis cell model was constructed using the human normal liver cell line (L-02) induced by fluoride. Cell viability was assessed using the CCK-8 assay kit. The lactate dehydrogenase (LDH) assay kit was utilized to measure LDH content in the cell supernatant, while the malonic dialdehyde (MDA) assay kit was employed to determine MDA levels within the cells. Subsequently, a fluorosis rat model was established, and LDH content in the cell supernatant was measured using the LDH assay kit. Various parameters, including MDA, superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT), and reactive oxygen species (ROS) content within the cells, were detected using appropriate assay kits. Additionally, cell apoptosis rate was determined using the Annexin V-FITC/PI cell apoptosis assay kit. The protein expression levels of B-cell lymphoma-2 (Bcl-2), Bcl-2-associated X protein (Bax), Caspase-3, Cleaved Caspase-3, Caspase-9, and Cleaved Caspase-9 were analyzed through Western blotting. Compared to the model group, the ethanolic fraction D of P.forrestii (Fr.D) increased cell viability (P < 0.01) and decreased LDH and MDA levels (P < 0.01). In the high-dose Fr.D treatment group of fluoride-poisoned rats, serum ALT, AST, LDH and MDA levels significantly decreased (P < 0.01). Results from rat primary cells exhibited that the Fr.D administration group exhibited significantly higher cell survival rates than the fluoride group (P < 0.01). Similarly, primary rat cells treated with Fr.D showed enhanced cell viability (P < 0.05) and reduced apoptosis rate, LDH, MDA, SOD, GSH-Px, CAT, and ROS levels (P < 0.05) compared to the model group. Western blot analysis indicated that the Fr.D treatment group elevated the Bcl-2/Bax protein expression ratio and reduced Caspase-3 and Caspase-9 activation levels (P < 0.01) compared to the model group. The results suggest that components within the Fr.D from Periploca forrestii may alleviate fluoride-induced liver injury by potentially counteracting oxidative stress and cell apoptosis.
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Affiliation(s)
- Wei-Yu Guo
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, China; School of Pharmacy, Guizhou Medical University, Guiyang 550004, China
| | - Ding-Yan Lu
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education) and State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550004, China
| | - Zhi-Zhong Guan
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education & Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang 550001, Guizhou, China
| | - Lin Zheng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, China
| | - Shuai-Shuai Chen
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, China; Guizhou Institute of Precision Medicine, Affiliated Hospital of Guizhou Medical University, Guiyang 550009, Guizhou, China.
| | - Ting Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, China; School of Pharmacy, Guizhou Medical University, Guiyang 550004, China.
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2
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Duan K, Shen Q, Wang Y, Xiang P, Shi Y, Yang C, Jiang C, Wang G, Xu JR, Zhang X. Herbicide 2,4-dichlorophenoxyacetic acid interferes with MAP kinase signaling in Fusarium graminearum and is inhibitory to fungal growth and pathogenesis. STRESS BIOLOGY 2023; 3:31. [PMID: 37676555 PMCID: PMC10442047 DOI: 10.1007/s44154-023-00109-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 07/11/2023] [Indexed: 09/08/2023]
Abstract
Plant hormones are important for regulating growth, development, and plant-pathogen interactions. Some of them are inhibitory to growth of fungal pathogens but the underlying mechanism is not clear. In this study, we found that hyphal growth of Fusarium graminearum was significantly reduced by high concentrations of IAA and its metabolically stable analogue 2,4-dichlorophenoxyacetic acid (2,4-D). Besides inhibitory effects on growth rate, treatments with 2,4-D also caused significant reduction in conidiation, conidium germination, and germ tube growth. Treatments with 2,4-D had no obvious effect on sexual reproduction but significantly reduced TRI gene expression, toxisome formation, and DON production. More importantly, treatments with 2,4-D were inhibitory to infection structure formation and pathogenesis at concentrations higher than 100 µM. The presence of 1000 µM 2,4-D almost completely inhibited plant infection and invasive growth. In F. graminearum, 2,4-D induced ROS accumulation and FgHog1 activation but reduced the phosphorylation level of Gpmk1 MAP kinase. Metabolomics analysis showed that the accumulation of a number of metabolites such as glycerol and arabitol was increased by 2,4-D treatment in the wild type but not in the Fghog1 mutant. Transformants expressing the dominant active FgPBS2S451D T455D allele were less sensitive to 2,4-D and had elevated levels of intracellular glycerol and arabitol induced by 2,4-D in PH-1. Taken together, our results showed that treatments with 2,4-D interfere with two important MAP kinase pathways and are inhibitory to hyphal growth, DON biosynthesis, and plant infection in F. graminearum.
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Affiliation(s)
- Kaili Duan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Qifang Shen
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yu Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Ping Xiang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yutong Shi
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Chenfei Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Cong Jiang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Guanghui Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jin-Rong Xu
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, 47907, USA.
| | - Xue Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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Wójcicka G, Pradiuch A, Fornal E, Stachniuk A, Korolczuk A, Marzec-Kotarska B, Nikolaichuk H, Czechowska G, Kozub A, Trzpil A, Góralczyk A, Bełtowski J. The effect of exenatide (a GLP-1 analogue) and sitagliptin (a DPP-4 inhibitor) on asymmetric dimethylarginine (ADMA) metabolism and selected biomarkers of cardiac fibrosis in rats with fructose-induced metabolic syndrome. Biochem Pharmacol 2023:115637. [PMID: 37290595 DOI: 10.1016/j.bcp.2023.115637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 05/31/2023] [Accepted: 05/31/2023] [Indexed: 06/10/2023]
Abstract
Asymmetric dimethylarginine (ADMA), an endogenous inhibitor of nitric oxide (NO) synthesis, is a risk factor for endothelial dysfunction, a common pathophysiological denominator for both atherogenesis and cardiac fibrosis. We aimed to investigate whether the cardioprotective and antifibrotic effects of incretin drugs, exenatide and sitagliptin, may be associated with their ability to affect circulating and cardiac ADMA metabolism. Normal and fructose-fed rats were treated with sitagliptin (5.0/10 mg/kg) or exenatide (5/10 µg/kg) for 4 weeks. The following methods were used: LC-MS/MS, ELISA, Real-Time-PCR, colorimetry, IHC and H&E staining, PCA and OPLS-DA projections. Eight-week fructose feeding resulted in an increase in plasma ADMA and a decrease in NO concentration. Exenatide administration into fructose-fed rats reduced the plasma ADMA level and increased NO level. In the heart of these animals exenatide administration increased NO and PRMT1 level, reduced TGF-ß1, α-SMA levels and COL1A1 expression. In the exenatide treated rats renal DDAH activity positively correlated with plasma NO level and negatively with plasma ADMA level and cardiac α-SMA concentration. Sitagliptin treatment of fructose-fed rats increased plasma NO concentration, reduced circulating SDMA level, increased renal DDAH activity and reduced myocardial DDAH activity. Both drugs attenuated the myocardial immunoexpression of Smad2/3/P and perivascular fibrosis. In the metabolic syndrome condition both sitagliptin and exenatide positively modulated cardiac fibrotic remodeling and circulating level of endogenous NOS inhibitors but had no effects on ADMA levels in the myocardium.
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Affiliation(s)
- G Wójcicka
- Department of Pathophysiology, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - A Pradiuch
- Department of Pathophysiology, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - E Fornal
- Department of Bioanalytic, Medical University of Lublin ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - A Stachniuk
- Department of Bioanalytic, Medical University of Lublin ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - A Korolczuk
- Department of Clinical Pathology, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - B Marzec-Kotarska
- Department of Clinical Pathology, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - H Nikolaichuk
- Department of Bioanalytic, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - G Czechowska
- Department of Pharmacology, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - A Kozub
- Department of Bioanalytic, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - A Trzpil
- Department of Bioanalytic, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - A Góralczyk
- Department of Pathophysiology, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
| | - J Bełtowski
- Department of Pathophysiology, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland.
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Wang W, Mu M, Zou Y, Deng S, Lu Y, Li Q, Li Z, Tao H, Wang Y, Tao X. Glycogen metabolism reprogramming promotes inflammation in coal dust-exposed lung. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 242:113913. [PMID: 35907323 DOI: 10.1016/j.ecoenv.2022.113913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/16/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Long-term coal dust exposure triggers complex inflammatory processes in the coal workers' pneumoconiosis (CWP) lungs. The progress of the inflammation is reported to be affected by disordered cell metabolism. However, the changes in the metabolic reprogramming associated with the pulmonary inflammation induced by the coal dust particles are unknown. Herein, we show that coal dust exposure causes glycogen accumulation and the reprogramming of glucose metabolism in the CWP lung. The glycogen accumulation caused by coal dust is mainly due to macrophages, which reprogram glycogen metabolism and trigger an inflammatory response. In addition, 2-deoxy-D-glucose (2-DG) reduced glycogen content in macrophages, which was accompanied by mitigated inflammation and restrained NF-κB activation. Accordingly, we have pinpointed a novel and crucial metabolic pathway that is an essential regulator of the inflammatory phenotype of coal dust-exposed macrophages. These results shed light on new ways to regulate CWP inflammation.
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Affiliation(s)
- Wenyang Wang
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Min Mu
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China
| | - Yuanjie Zou
- School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Songsong Deng
- Department of Clinical Laboratory, Chaoyang Hospital, Huainan, China
| | - Yuting Lu
- School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Qinglong Li
- School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Zeyu Li
- School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Huihui Tao
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China
| | - Yun Wang
- School of Bioengineering, Huainan Normal University, Huainan 232038, China
| | - Xinrong Tao
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China.
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5
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Antibacterial effect of Cu2O/TiO2 photocatalytic composite on Pseudomonas marginalis pv. marginalis. Arch Microbiol 2022; 204:462. [DOI: 10.1007/s00203-022-03065-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/13/2022] [Indexed: 11/02/2022]
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6
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Aizawa Y, Mori M, Suzuki T, Saito A, Inoue H. Shotgun proteomic investigation of methyltransferase and methylation profiles in lipopolysaccharide stimulated RAW264.7 murine macrophages. Biomed Res 2022; 43:73-80. [PMID: 35718447 DOI: 10.2220/biomedres.43.73] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Arginine methylation is a common post-translational modification which functions as an epigenetic regulator of transcription and plays a key role in various cell signaling pathways. The methylation of arginine residues is catalyzed by protein arginine methyltransferase (PRMT). However, the expression pattern and underlying mechanism of PRMTs and protein methylation profile in lipopolysaccharide (LPS)-induced innate immune responses are poorly understood. Using a shotgun proteomic approach, we found that LPS stimulation increased arginine and proline metabolism and responses to inflammation and bacterial infections. In comparison, cysteine and methionine metabolism, the pentose phosphate pathway, purine metabolism, and protein methylation factors were also decreased in LPS stimulated murine macrophage cell lines. We revealed that LPS stimulation downregulated PRMT1, PRMT5, and protein arginine methylation profiles in RAW264.7 cells using western blot analysis. Additionally, this phenomenon occurred in parallel with nitric oxide accumulation in LPS-induced macrophages. Using inflammation models, we demonstrate for the first time that LPS stimulation decreases PRMTs, leading to the decreasing of arginine methylation in macrophages.
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Affiliation(s)
- Yumi Aizawa
- Faculty of Applied Bioscience, Tokyo University of Agriculture.,Research and Development Center for Minimally Invasive Therapies, Institute of Medical Science, Tokyo Medical University
| | - Masaru Mori
- Institute for Advanced Biosciences, Keio University
| | - Tsukasa Suzuki
- Faculty of Applied Bioscience, Tokyo University of Agriculture
| | - Akihiro Saito
- Faculty of Applied Bioscience, Tokyo University of Agriculture
| | - Hirofumi Inoue
- Faculty of Applied Bioscience, Tokyo University of Agriculture
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7
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Zhang X, Li Z, Liu X, Qin X, Luo J, Zhang W, Liu B, Wei Y. ZPI prevents ox-LDL-mediated endothelial injury leading to inhibition of EndMT, inflammation, apoptosis, and oxidative stress through activating Pi3k/Akt signal pathway. Drug Dev Res 2022; 83:1212-1225. [PMID: 35656597 DOI: 10.1002/ddr.21952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 03/31/2022] [Accepted: 05/02/2022] [Indexed: 11/09/2022]
Abstract
Oxidized low-density lipoprotein (ox-LDL)-mediated endothelial dysfunction exerts an essential role in the development of atherosclerosis. Protein Z-dependent protease inhibitor (ZPI), a member of the serine protease inhibitor superfamily, could inhibit the function of activated coagulation factor X (FXa) via interaction with protein Z (PZ). Studies have pointed out that ZPI was statistically related to atherosclerotic diseases, which may have a robust cardiovascular protective effect. However, the underlying mechanism of ZPI on ox-LDL-mediated endothelial injury requires further elucidation. Human umbilical vein endothelial cells (HUVECs) were treated with ox-LDL (100 μg/ml) and ZPI (10 μg/ml). Cell viability was measured by the Cell Counting Kit-8 (CCK-8) assay. Cell apoptosis, oxidative stress, and endothelial-to-mesenchymal transition (EndMT) were analyzed by immunofluorescence (IF). Cell migration was measured using a wound-healing assay. Quantitative real-time polymerase chain reaction and western blot analysis were performed to determine messenger RNA and protein expression. Ox-LDL (100 μg/ml, 48 h) significantly reduced cell viability and migration, increased EndMT, inflammation, apoptosis, and oxidative stress. The related protein expression of phosphatidylinositol 3 kinase/protein kinase B (Pi3k/Akt) signal pathway in HUVECs was also simultaneously decreased. We also discovered that ZPI treatment could prevent ox-LDL-mediated endothelial injury through the improvement of cell viability and alleviation of apoptosis, oxidative stress, EndMT, and inflammation. Thus, the protective effect of ZPI on HUVECs may be mediated by activation of the Pi3k/Akt signal pathway. ZPI may exert an important protective role in HUVECs dysfunction triggered by ox-LDL via activation of the Pi3k/Akt signal pathway. Therefore, ZPI may possess potential therapeutic effects on atherosclerotic endothelial injury-related diseases.
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Affiliation(s)
- Xingxu Zhang
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhiqiang Li
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiangdong Liu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiaoming Qin
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jiachen Luo
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wenming Zhang
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Baoxin Liu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yidong Wei
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
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Zhang K, Chai B, Ji H, Chen L, Ma Y, Zhu L, Xu J, Wu Y, Lan Y, Li H, Feng Z, Xiao J, Zhang H, Xu K. Bioglass promotes wound healing by inhibiting endothelial cell pyroptosis through regulation of the connexin 43/reactive oxygen species (ROS) signaling pathway. J Transl Med 2022; 102:90-101. [PMID: 34521991 DOI: 10.1038/s41374-021-00675-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 08/22/2021] [Accepted: 08/30/2021] [Indexed: 11/08/2022] Open
Abstract
Bioactive glass (BG) has recently shown great promise in soft tissue repair, especially in wound healing; however, the underlying mechanism remains unclear. Pyroptosis is a novel type of programmed cell death that is involved in various traumatic injury diseases. Here, we hypothesized that BG may promote wound healing through suppression of pyroptosis. To test this scenario, we investigated the possible effect of BG on pyroptosis in wound healing both in vivo and in vitro. This study showed that BG can accelerate wound closure, granulation formation, collagen deposition, and angiogenesis. Moreover, western blot analysis and immunofluorescence staining revealed that BG inhibited the expression of pyroptosis-related proteins in vivo and in vitro. In addition, while BG regulated the expression of connexin43 (Cx43), it inhibited reactive oxygen species (ROS) production. Cx43 activation and inhibition experiments further indicate that BG inhibited pyroptosis in endothelial cells by decreasing Cx43 expression and ROS levels. Taken together, these studies suggest that BG promotes wound healing by inhibiting pyroptosis via Cx43/ROS signaling pathway.
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Affiliation(s)
- Kailun Zhang
- Institute of Life Sciences, Engineering Laboratory of Zhejiang province for pharmaceutical development of growth factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Zhejiang, China
| | - Bo Chai
- School of Pharmaceutical Sciences, Wenzhou Wound Repair and Regeneration Key Laboratory, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang, China
| | - Hao Ji
- Institute of Life Sciences, Engineering Laboratory of Zhejiang province for pharmaceutical development of growth factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Zhejiang, China
| | - Liuqing Chen
- Institute of Life Sciences, Engineering Laboratory of Zhejiang province for pharmaceutical development of growth factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Zhejiang, China
| | - Yanbing Ma
- Institute of Life Sciences, Engineering Laboratory of Zhejiang province for pharmaceutical development of growth factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Zhejiang, China
| | - Lifei Zhu
- School of Pharmaceutical Sciences, Wenzhou Wound Repair and Regeneration Key Laboratory, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang, China
| | - Jingyu Xu
- Institute of Life Sciences, Engineering Laboratory of Zhejiang province for pharmaceutical development of growth factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Zhejiang, China
| | - Yanqing Wu
- Institute of Life Sciences, Engineering Laboratory of Zhejiang province for pharmaceutical development of growth factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Zhejiang, China
| | - Yinan Lan
- Department of Orthopedic Surgery, Lishui Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Zhejiang, China
| | - Hao Li
- Department of Orthopedics Surgery, Lishui People's Hospital, The sixth affiliated hospital of Wenzhou medical university, Lishui, Zhejiang, China
| | - Zhiguo Feng
- School of Pharmaceutical Sciences, Wenzhou Wound Repair and Regeneration Key Laboratory, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang, China
| | - Jian Xiao
- School of Pharmaceutical Sciences, Wenzhou Wound Repair and Regeneration Key Laboratory, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang, China.
| | - Hongyu Zhang
- School of Pharmaceutical Sciences, Wenzhou Wound Repair and Regeneration Key Laboratory, Cixi Biomedical Research Institute, Wenzhou Medical University, Zhejiang, China.
| | - Ke Xu
- Institute of Life Sciences, Engineering Laboratory of Zhejiang province for pharmaceutical development of growth factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Zhejiang, China.
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Yang Q, Lu T, Yan J, Li J, Zhou H, Pan X, Lu Y, He N, Ling X. Regulation of polyunsaturated fatty acids synthesis by enhancing carotenoid-mediated endogenous antioxidant capacity in Schizochytrium sp. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Sun C, Shen H, Cai H, Zhao Z, Gan G, Feng S, Chu P, Zeng M, Deng J, Ming F, Ma M, Jia J, He R, Cao D, Chen Z, Li J, Zhang L. Intestinal guard: Human CXCL17 modulates protective response against mycotoxins and CXCL17-mimetic peptides development. Biochem Pharmacol 2021; 188:114586. [PMID: 33932472 DOI: 10.1016/j.bcp.2021.114586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 04/24/2021] [Accepted: 04/26/2021] [Indexed: 02/06/2023]
Abstract
Mycotoxin contamination is an ongoing and growing issue that can create health risks and even cause death. Unfortunately, there is currently a lack of specific therapy against mycotoxins with few side effects. On the other hand, the strategic expression of CXCL17 in mucosal tissues suggests that it may be involved in immune response when exposed to mycotoxins, but the exact role of CXCL17 remains largely unknown. Using Caco-2 as a cell model of the intestinal epithelial barrier (the first line of defense against mycotoxins), we showed that a strong production of ROS-dependent CXCL17 was triggered by mycotoxins via p38 and JNK pathways. Under the mycotoxins stress, CXCL17 modulated enhanced immuno-protective response with a remission of inflammation and apoptosis through PI3K/AKT/mTOR. Based on our observed feedback of CXCL17 to the mycotoxins, we developed the CXCL17-mimetic peptides in silico (CX1 and CX2) that possessed the safety and the capability to ameliorate mycotoxins-inducible inflammation and apoptosis. In this study, the identification of detoxifying feature of CXCL17 is a prominent addition to the chemokine field, pointing out a new direction for curing the mycotoxins-caused damage.
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Affiliation(s)
- Chongjun Sun
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Haokun Shen
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Haiming Cai
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Zengjue Zhao
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Guanhua Gan
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Saixiang Feng
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Pinpin Chu
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Min Zeng
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Jinbo Deng
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Feiping Ming
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Miaopeng Ma
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Junhao Jia
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Rongxiao He
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Ding Cao
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Zhiyang Chen
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Jiayi Li
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Linghua Zhang
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, Guangdong 510642, China.
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Inoue H, Hanawa N, Katsumata SI, Aizawa Y, Katsumata-Tsuboi R, Tanaka M, Takahashi N, Uehara M. Iron deficiency negatively regulates protein methylation via the downregulation of protein arginine methyltransferase. Heliyon 2020; 6:e05059. [PMID: 33033759 PMCID: PMC7533365 DOI: 10.1016/j.heliyon.2020.e05059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/25/2020] [Accepted: 09/21/2020] [Indexed: 12/21/2022] Open
Abstract
Iron is an essential trace metal for all biological processes and plays a role in almost every aspect of body growth. Previously, we found that iron-depletion downregulated the expression of proteins, arginine methyltransferase-1 and 3 (PRMT1 and PRMT3), by an iron-specific chelator, deferoxamine (DFO), in rat liver FAO cell line using DNA microarray analysis (unpublished data). However, regulatory mechanisms underlying the association between iron deficiency and PRMT expression are unclear in vitro and in vivo. In the present study, we revealed that the treatment of cells with two iron-specific chelators, DFO and deferasirox (DFX), downregulated the gene and protein expression of PRMT1 and 3 as compared with the untreated cells. Subsequently, DFO and DFX treatments decreased protein methylation. Importantly, these effects were attenuated by a holo-transferrin treatment. Furthermore, weanling Wistar-strain rats were fed a control diet or an iron-deficient diet for 4 weeks. Dietary iron deficiency was found to decrease the concentration of hemoglobin and liver iron while increasing the heart weight. PRMT and protein methylation levels were also significantly reduced in the iron-deficient group as compared to the control group. To our knowledge, this is the first study to demonstrate that PRMT levels and protein methylation are reduced in iron-deficient models, in vitro and in vivo.
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Affiliation(s)
- Hirofumi Inoue
- Department of Nutritional Science and Food Safety, Faculty of Applied Bioscience, Tokyo University of Agriculture, Japan
| | - Nobuaki Hanawa
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, Japan
| | - Shin-Ichi Katsumata
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, Japan
| | - Yumi Aizawa
- Department of Agricultural Chemistry, Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo, Japan
| | - Rie Katsumata-Tsuboi
- Department of Nutritional Science and Food Safety, Faculty of Applied Bioscience, Tokyo University of Agriculture, Japan
| | - Miori Tanaka
- Department of Nutritional Science and Food Safety, Faculty of Applied Bioscience, Tokyo University of Agriculture, Japan
| | - Nobuyuki Takahashi
- Department of Nutritional Science and Food Safety, Faculty of Applied Bioscience, Tokyo University of Agriculture, Japan
| | - Mariko Uehara
- Department of Nutritional Science and Food Safety, Faculty of Applied Bioscience, Tokyo University of Agriculture, Japan
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12
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Wang E, Liu X, Tu W, Do DC, Yu H, Yang L, Zhou Y, Xu D, Huang S, Yang P, Ran P, Gao P, Liu Z. Benzo(a)pyrene facilitates dermatophagoides group 1 (Der f 1)-induced epithelial cytokine release through aryl hydrocarbon receptor in asthma. Allergy 2019; 74:1675-1690. [PMID: 30982974 PMCID: PMC6790621 DOI: 10.1111/all.13784] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 01/24/2019] [Accepted: 02/18/2019] [Indexed: 01/12/2023]
Abstract
BACKGROUND Environmental pollutants, which coexist with allergens, have been associated with the exacerbation of asthma. However, the underlying molecular mechanisms remain elusive. We sought to determine whether benzo(a)pyrene (BaP) co-exposure with dermatophagoides group 1 allergen (Der f 1) can potentiate Der f 1-induced asthma and its underlying mechanisms. METHODS The effect of BaP was investigated in Der f 1-induced mouse model of asthma, including airway hyper-responsiveness, allergic inflammation, and epithelial-derived cytokines. The impact of BaP on Der f 1-induced airway epithelial cell oxidative stress (ROS) and cytokine release was further analyzed. The role of aryl hydrocarbon receptor (AhR) signaling in BaP-promoted Der f 1-induced ROS, cytokine production, and allergic inflammation was also investigated. RESULTS Compared with Der f 1, BaP co-exposure with Der f 1 led to airway hyper-responsiveness and increased lung inflammation in mouse model of asthma. Increased expression of TSLP, IL-33, and IL-25 was also found in the airways of these mice. Moreover, BaP co-exposure with Der f 1 activated AhR signaling with increased expression of AhR and CYP1A1 and promoted airway epithelial ROS generation and TSLP and IL-33, but not IL-25, expression. Interestingly, AhR antagonist CH223191 or cells with AhR knockdown abrogated the increased expression of ROS, TSLP, and IL-33. Furthermore, ROS inhibitor N-acetyl-L-cysteine (NAC) also suppressed BaP co-exposure-induced expression of epithelial TSLP, IL-33, and IL-25. Finally, AhR antagonist CH223191 and NAC inhibited BaP co-exposure with Der f 1-induced lung inflammation. CONCLUSIONS Our findings suggest that BaP facilitates Der f 1-induced epithelial cytokine release through the AhR-ROS axis.
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Affiliation(s)
- Eryi Wang
- The Affiliated Luohu Hospital of Shenzhen University, Shenzhen Luohu Hospital GroupShenzhenChina
- The State Key Laboratory of Respiratory Disease for Allergy, Shenzhen University School of MedicineShenzhen UniversityShenzhenChina
| | - Xiaoyu Liu
- The State Key Laboratory of Respiratory Disease for Allergy, Shenzhen University School of MedicineShenzhen UniversityShenzhenChina
| | - Wei Tu
- The Affiliated Luohu Hospital of Shenzhen University, Shenzhen Luohu Hospital GroupShenzhenChina
- The State Key Laboratory of Respiratory Disease for Allergy, Shenzhen University School of MedicineShenzhen UniversityShenzhenChina
| | - Danh C. Do
- Johns Hopkins Asthma and Allergy CenterJohns Hopkins University School of MedicineBaltimoreMaryland
| | - Haiqiong Yu
- The Affiliated Luohu Hospital of Shenzhen University, Shenzhen Luohu Hospital GroupShenzhenChina
| | - Liteng Yang
- The Affiliated Luohu Hospital of Shenzhen University, Shenzhen Luohu Hospital GroupShenzhenChina
| | - Yufeng Zhou
- Key Laboratory of Neonatal Disease, Ministry of Health, Children's Hospital and Institute of Biomedical SciencesFudan UniversityShanghaiChina
| | - Damo Xu
- Institute of Infection, Immunity and InflammationUniversity of GlasgowGlasgowUK
| | - Shau‐Ku Huang
- The Affiliated Luohu Hospital of Shenzhen University, Shenzhen Luohu Hospital GroupShenzhenChina
- Johns Hopkins Asthma and Allergy CenterJohns Hopkins University School of MedicineBaltimoreMaryland
- National Institute of Environmental Health SciencesNational Health Research InstitutesMiaoliTaiwan
| | - Pingchang Yang
- The Affiliated Luohu Hospital of Shenzhen University, Shenzhen Luohu Hospital GroupShenzhenChina
- The State Key Laboratory of Respiratory Disease for Allergy, Shenzhen University School of MedicineShenzhen UniversityShenzhenChina
| | - Pixin Ran
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Diseases, The First Affiliated HospitalGuangzhou Medical UniversityGuangzhouChina
| | - Pei‐Song Gao
- Johns Hopkins Asthma and Allergy CenterJohns Hopkins University School of MedicineBaltimoreMaryland
| | - Zhigang Liu
- The Affiliated Luohu Hospital of Shenzhen University, Shenzhen Luohu Hospital GroupShenzhenChina
- The State Key Laboratory of Respiratory Disease for Allergy, Shenzhen University School of MedicineShenzhen UniversityShenzhenChina
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Tong T, Liu Z, Zhang H, Sun J, Zhang D, Wang F, Miao D, Shen Y. Age-dependent expression of the vitamin D receptor and the protective effect of vitamin D receptor activation on H 2O 2-induced apoptosis in rat intervertebral disc cells. J Steroid Biochem Mol Biol 2019; 190:126-138. [PMID: 30905826 DOI: 10.1016/j.jsbmb.2019.03.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/13/2019] [Accepted: 03/19/2019] [Indexed: 11/17/2022]
Abstract
Accumulating evidence shows that genetic polymorphism of the vitamin D receptor (VDR) gene is associated with intervertebral disc degeneration (IDD), implying that VDR may be involved in the pathogenesis of IDD. However, the exact relationship between VDR and IDD remains unknown. The aim of this study was to investigate the age-dependent expression of VDR in rat intervertebral discs and to determine the effect of VDR on oxidative stress-induced cell apoptosis of the annulus fibrosus (AF) and the underlying mechanism. Sprague-Dawley rats were subjected to magnetic resonance imaging (MRI) and CT scans at young (2-3 months), adult (6-7 months), and old (14-15 months) ages. The images revealed age-related degeneration of the lumbar intervertebral discs and endplates. Immunohistochemistry demonstrated positive expression of VDR in the AF. The expression level of VDR in aged rats was significantly reduced compared with that in the young and adult animals and exhibited a negative correlation to IDD severity. Western blot analysis further demonstrated that the amount of VDR protein was significantly decreased in severe degenerative discs. AF cells were also isolated from young rat lumbar discs and subjected to different concentrations of hydrogen peroxide (H2O2) for various amounts of time. The results revealed that H2O2 inhibited the viability of AF cells and induced mitochondrial pathway apoptosis. However, pretreatment of AF cells with 10-7 and 10-8 M 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] effectively increased cell viability, increased mitochondrial membrane potential, decreased the level of reactive oxygen species, increased mitochondrial ATP content, reserved the activity of key enzymes in the oxidative respiratory chain, and thus protected the mitochondria from H2O2-induced damage. Whereas, siRNA knock-down of VDR abolished the protective effects of 1,25(OH)2D3. Moreover, 1,25(OH)2D3 inhibited H2O2-induced autophagy of AF cells through inhibition of the mTOR/p70S6K signal pathway. Our study demonstrated that decreased expression of VDR may play a role in age-related intervertebral disc degeneration in rats and that activation of VDR ameliorates oxidative stress-induced apoptosis in AF cells by preserving mitochondrial functions.
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Affiliation(s)
- Tong Tong
- Department of Spine Surgery, Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China
| | - Zhihui Liu
- Department of Endocrinology and Metabolism, First Hospital of Shijiazhuang City, Shijiazhuang, 050051, China
| | - Hua Zhang
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, 050051, China
| | - Jinglei Sun
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, 050051, China
| | - Dongxia Zhang
- Department of Cardiovascular Medicine, Fourth Hospital of Hebei Medical University, Shijiazhuang, 050051, China
| | - Feng Wang
- Department of Spine Surgery, Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China
| | - Dechao Miao
- Department of Spine Surgery, Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China
| | - Yong Shen
- Department of Spine Surgery, Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China.
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Chen WT, Shie CB, Yang CC, Lee TM. Blockade of Cardiac Proton Pump Impairs Ventricular Remodeling Through a Superoxide-DDAH-Dependent Pathway in Infarcted Rats. ACTA CARDIOLOGICA SINICA 2019; 35:165-178. [PMID: 30930564 DOI: 10.6515/acs.201903_35(2).20180917a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Background Proton pump inhibitors (PPIs) are frequently used to prevent or treat peptic ulcers. Recently, PPIs have been shown to increase the risk of myocardial infarction. The purpose of this study was to determine whether PPIs adversely affect ventricular remodeling in infarcted rats. Methods Male Wistar rats were randomly assigned to receive either vehicle, omeprazole, omeprazole + vitamin C, omeprazole + olmesartan, or famotidine treatment for 4 weeks starting 24 hours after inducing myocardial infarction by ligating coronary arteries. Results Compared with vehicle-treated infarcted rats, omeprazole-treated infarcted rats had significant changes with reduced myocardial vitamin C levels, increased oxidant production, and decreased dimethylarginine dimethylaminohydrolase 2 (DDAH2) activity, which in turn increased asymmetric dimethylarginine (ADMA) levels and impaired ventricular remodeling. With gastric protection similar to omeprazole, the H2 blocker famotidine had no effect on ventricular remodeling. In contrast to the in vivo results, the ex vivo study showed similar superoxide and DDAH2 protein levels between vehicle- and omeprazole-treated infarcted rats, suggesting involvement of gastric vitamin C uptake rather than myocardial vitamin C in mediating the impaired axis of vitamin C-superoxide-DDAH2 in the in vivo measurements. The administration of PPIs was associated with impaired DDAH2 expression and increased myocardial ADMA, which impaired ventricular remodeling after infarction. These effects were prevented by the coadministration of vitamin C or olmesartan. Conclusions Our results indicate that the administration of PPIs was associated with impaired DDAH2 expression and increased myocardial ADMA by reducing gastric vitamin C uptake, which impaired ventricular remodeling after infarction.
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Affiliation(s)
| | - Chang-Bie Shie
- Gastrointestinal Section, Department of Medicine, China Medical University-An Nan Hospital, Tainan
| | | | - Tsung-Ming Lee
- Cardiovascular Institute.,Department of Medicine, School of Medicine, China Medical University, Taichung.,Department of Internal Medicine, School of Medicine, Taipei Medical University, Taipei, Taiwan
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Sun D, Zhang Z, Zhang Y, Cheng KW, Chen F. Light induces carotenoids accumulation in a heterotrophic docosahexaenoic acid producing microalga, Crypthecodinium sp. SUN. BIORESOURCE TECHNOLOGY 2019; 276:177-182. [PMID: 30623873 DOI: 10.1016/j.biortech.2018.12.093] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 12/22/2018] [Accepted: 12/24/2018] [Indexed: 06/09/2023]
Abstract
In the present study, the effect of various light conditions on carotenoid accumulation in a novel heterotrophic microalga, Crypthecodinium sp. SUN was investigated. The results showed that C. sp. SUN mainly produced γ-carotene and β-carotene. The total carotenoid content could reach to 12.8 mg g-1 dry weight under high light intensity (100 μmol m-2 s-1), which was >100-fold higher than that under dark condition. Besides, along with the light intensity increased, the ROS level in vivo was decreased at 48 h and 72 h. Further study showed that, light could efficiently promote the gene expression of PSY and LCYb, which explain the molecular mechanisms of carotenoids accumulation under light conditions. Meanwhile, slightly inhibited fatty acids accumulation could promote the carotenoids yield. The present work proposed that C. sp. SUN could be a potential carotenoid producer, and provided valuable insight for carotenoids biosynthesis.
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Affiliation(s)
- Dongzhe Sun
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China; Nutrition & Health Research Institute, COFCO, Beijing 102209, China
| | - Zhao Zhang
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China; BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
| | - Yue Zhang
- BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
| | - Ka-Wing Cheng
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China; BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; Institute for Advanced Study, Shenzhen University, Nanshan, Shenzhen 518060, China
| | - Feng Chen
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China; BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; Institute for Advanced Study, Shenzhen University, Nanshan, Shenzhen 518060, China.
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16
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Bao X, Wu J, Kim S, LoRusso P, Li J. Pharmacometabolomics Reveals Irinotecan Mechanism of Action in Cancer Patients. J Clin Pharmacol 2018; 59:20-34. [PMID: 30052267 DOI: 10.1002/jcph.1275] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/31/2018] [Indexed: 12/25/2022]
Abstract
The purpose of this study was to identify early circulating metabolite changes implicated in the mechanism of action of irinotecan, a DNA topoisomerase I inhibitor, in cancer patients. A liquid chromatography-tandem mass spectrometry-based targeted metabolomic platform capable of measuring 254 endogenous metabolites was applied to profile circulating metabolites in plasma samples collected pre- and post-irinotecan treatment from 13 cancer patients. To gain further mechanistic insights, metabolic profiling was also performed for the culture medium of human primary hepatocytes (HepatoCells) and 2 cancer cell lines on exposure to SN-38 (an active metabolite of irinotecan). Intracellular reactive oxygen species (ROS) was detected by dihydroethidium assay. Irinotecan induced a global metabolic change in patient plasma, as represented by elevations of circulating purine/pyrimidine nucleobases, acylcarnitines, and specific amino acid metabolites. The plasma metabolic signature was well replicated in HepatoCells medium on SN-38 exposure, whereas in cancer cell medium SN-38 induced accumulation of pyrimidine/purine nucleosides and nucleobases while having no impact on acylcarnitines and amino acid metabolites. SN-38 induced ROS in HepatoCells, but not in cancer cells. Distinct metabolite signatures of SN-38 exposure in HepatoCells medium and cancer cell medium revealed different mechanisms of drug action on hepatocytes and cancer cells. Elevations in circulating purine/pyrimidine nucleobases may stem from nucleotide degradation following irinotecan-induced DNA double-strand breaks. Accumulations of circulating acylcarnitines and specific amino acid metabolites may reflect, at least in part, irinotecan-induced mitochondrial dysfunction and oxidative stress in the liver. The plasma metabolic signature of irinotecan exposure provides early insights into irinotecan mechanism of action in patients.
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Affiliation(s)
- Xun Bao
- Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jianmei Wu
- Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Seongho Kim
- Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Patricia LoRusso
- Yale Cancer Center, Yale University School of Medicine, New Haven, CT, USA
| | - Jing Li
- Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
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Li XQ, Cai LM, Liu J, Ma YL, Kong YH, Li H, Jiang M. Liquiritin suppresses UVB‑induced skin injury through prevention of inflammation, oxidative stress and apoptosis through the TLR4/MyD88/NF‑κB and MAPK/caspase signaling pathways. Int J Mol Med 2018; 42:1445-1459. [PMID: 29901082 PMCID: PMC6089709 DOI: 10.3892/ijmm.2018.3720] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Accepted: 05/09/2018] [Indexed: 12/03/2022] Open
Abstract
Solar ultraviolet B (UVB) radiation is known to trigger inflammation, oxidative stress and apoptotic responses through various signaling pathways, which eventually lead to skin cancer. The present study investigated whether liquiritin suppresses UVB-induced skin injury in viv and in vitr using SKH-1 hairless mice and HACAT cells, respectively. The animals were exposed to UVB irradiation (180 mJ/cm2) for 20 min, followed by liquiritin treatment. The findings indicated that UVB exposure resulted in the excessive release of pro-inflammatory cytokines, including interleukin (IL)-1β, tumor necrosis factor (TNF)-α, IL-18, IL-6 and cyclooxygenase (COX)2, which were dependent on the toll-like receptor (TLR)4/myeloid differentiation factor 88 (MyD88)/nuclear factor-κB (NF-κB) signaling pathway. Oxidative stress was also observed, evidenced by reduced antioxidants and elevated oxidants. Apoptosis, examined using terminal deoxynucleotidyl transferase dUTP nick end labeling and crystal violet staining, suggested that UVB irradiation caused cell death in viv and in vitro, which was closely associated with p38/c-Jun N-terminal kinase and caspase activity. Of note, liquiritin treatment in mice and cells exposed to UVB showed reduced inflammatory response, oxidative stress and apoptosis through inhibiting the activation of TLR4/MyD88/NF-κB mitogen-activated protein kinases and caspase pathways, and downregulating the release of oxidants. Overall, the data revealed that liquiritin may be a useful compound against UVB-induced skin injury.
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Affiliation(s)
- Xiao-Qing Li
- Department of Dermatology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Li-Min Cai
- Department of Dermatology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Jing Liu
- Department of Dermatology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Yan-Li Ma
- Department of Dermatology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Ying-Hui Kong
- Department of Dermatology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - He Li
- Department of Dermatology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Ming Jiang
- Department of Dermatology, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
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Sadeghian I, Khalvati B, Ghasemi Y, Hemmati S. TAT-mediated intracellular delivery of carboxypeptidase G2 protects against methotrexate-induced cell death in HepG2 cells. Toxicol Appl Pharmacol 2018; 346:9-18. [PMID: 29574210 DOI: 10.1016/j.taap.2018.03.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 03/05/2018] [Accepted: 03/20/2018] [Indexed: 12/20/2022]
Abstract
Side effects of methotrexate (MTX) especially hepatotoxicity limits clinical applications of this anticancer agent. Carboxypeptidase G2 (CPG2) is administrated for the treatment of elevated plasma concentrations of MTX. In this study, we have investigated the intracellular delivery of CPG2 fused to the transactivator transduction domain (TAT) and its protective effects against MTX-induced cell death of HepG2 cells. We have observed that both native and denatured forms of the enzyme transduced into the HepG2 cells efficiently in a concentration and time-dependent manner. The denatured protein transduced with higher efficiency than the native form and was functional inside the cells. MTX exposure significantly decreased HepG2 cell viability in a dose- and time-dependent manner. The cell viability after 24 and 48 h of incubation with 100 μM MTX was reduced to 44.37% and 17.69%, respectively. In cells pretreated with native and denatured TAT-CPG2 protein the cell viability was 98.63% and 86.31% after 24 and 48 h, respectively. Treatment with MTX increased the number of apoptotic HepG2 cells to 90.23% after 48 h. However, the apoptosis percentage in cells pretreated with native and denatured TAT-CPG2 was 21.49% and 22.28%, respectively. Our results showed that TAT-CPG2 significantly prevents MTX-induced oxidative stress by decreasing the formation of ROS and increasing the content of glutathione (GSH) and catalase activity. Our finding indicates that both native and denatured TAT-CPG2 strongly protect HepG2 cells against MTX-induced oxidative stress and apoptosis. Hence, intracellular delivery of CPG2 might provide a new therapeutic strategy for protecting against MTX mediated cytotoxicity.
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Affiliation(s)
- Issa Sadeghian
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Bahman Khalvati
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Younes Ghasemi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Shiva Hemmati
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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Fang Z, Luo W, Luo Y. Protective effect of α-mangostin against CoCl2-induced apoptosis by suppressing oxidative stress in H9C2 rat cardiomyoblasts. Mol Med Rep 2018; 17:6697-6704. [PMID: 29512772 DOI: 10.3892/mmr.2018.8680] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 02/01/2018] [Indexed: 12/07/2022] Open
Abstract
Garcinia mangostana (a fruit) has been commonly used as a traditional drug in the treatment of various types of diseases. The aim of the present study was to evaluate the potential protective effect of α‑mangostin (α‑MG), a primary constituent extracted from the hull of the G. mangostana fruit (mangosteen), against CoCl2‑induced apoptotic damage in H9C2 rat cardiomyoblasts. α‑MG was demonstrated to significantly improve the viability of the CoCl2‑treated cells by up to 79.6%, attenuating CoCl2‑induced damage. Further studies revealed that α‑MG exerted a positive effect in terms of decreased reactive oxygen species generation, malondialdehyde concentration, cellular apoptosis, and increased superoxide dismutase activity. Furthermore, treatment with CoCl2 increased the cleavage of caspase‑9, caspase‑3 and apoptosis regulator BAX, and reduced apoptosis regulator Bcl‑2 in H9C2 cells, as measured by reverse transcription‑quantitative polymerase chain reaction and western blotting, which were significantly reversed by co‑treatment with α‑MG (0.06 and 0.3 mM). In conclusion, these results demonstrated that α‑MG protects H9C2 cells against CoCl2‑induced hypoxic injury, indicating that α‑MG is a potential therapeutic agent for cardiac hypoxic injury.
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Affiliation(s)
- Zhao Fang
- Department of Cardiovascular Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Wanjun Luo
- Department of Cardiovascular Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Yanli Luo
- International Medical Center, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
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Polachi N, Subramaniyan B, Nagaraja P, Rangiah K, Ganeshan M. Extract from Butea monosperma inhibits β-catenin/Tcf signaling in SW480 human colon cancer cells. GENE REPORTS 2018. [DOI: 10.1016/j.genrep.2017.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Zhang Z, Sun D, Cheng KW, Chen F. Inhibition of autophagy modulates astaxanthin and total fatty acid biosynthesis in Chlorella zofingiensis under nitrogen starvation. BIORESOURCE TECHNOLOGY 2018; 247:610-615. [PMID: 28985609 DOI: 10.1016/j.biortech.2017.09.133] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/15/2017] [Accepted: 09/19/2017] [Indexed: 05/16/2023]
Abstract
The present study showed that inhibition of autophagy significantly increased cellular levels of reactive oxygen species in Chlorella zofingiensis under nitrogen starvation. This was accompanied with increased expression of PSY, and enhanced accumulation of astaxanthin after 48h of cultivation. Nevertheless, the proportion of astaxanthin in secondary carotenoids remained unchanged. Meanwhile, the expression level of ACCase was also elevated in the 3-MA-treated cells compared to the control despite a >20% lower content of fatty acid in the former than the latter. This phenomenon might be due to inhibition of recycling of cellular components by 3-MA and suggests the potential involvement of post-transcriptional regulation in fatty acid biosynthesis. In summary, our work has been the first to report a potentially important role of autophagy in fatty acid and astaxanthin accumulation in C. zofingiensis under stress conditions. The findings might provide valuable insights to guide further research in this area.
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Affiliation(s)
- Zhao Zhang
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China; BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
| | - Dongzhe Sun
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Ka-Wing Cheng
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Feng Chen
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China; BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China.
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Navia-Pelaez JM, Campos-Mota GP, Araujo de Souza JC, Aguilar EC, Stergiopulos N, Alvarez-Leite JI, Capettini LSA. nNOS uncoupling by oxidized LDL: Implications in atherosclerosis. Free Radic Biol Med 2017; 113:335-346. [PMID: 28970060 DOI: 10.1016/j.freeradbiomed.2017.09.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 09/13/2017] [Accepted: 09/21/2017] [Indexed: 02/03/2023]
Affiliation(s)
- Juliana Maria Navia-Pelaez
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Gianne Paul Campos-Mota
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Jessica Cristina Araujo de Souza
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Edenil Costa Aguilar
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil; Laboratory of Atherosclerosis and Nutritional Biochemistry, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Nikos Stergiopulos
- Laboratory of Hemodynamics and Cardiovascular Technology, Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, BM 5128 Station 17, CH-1015 Lausanne, Switzerland.
| | - Jacqueline Isaura Alvarez-Leite
- Laboratory of Atherosclerosis and Nutritional Biochemistry, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Luciano Santos Aggum Capettini
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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Nagasaka H, Morioka I, Takuwa M, Nakacho M, Yoshida M, Ishida A, Hirayama S, Miida T, Tsukahara H, Yorifuji T, Iijima K. Blood asymmetric dimethylarginine and nitrite/nitrate concentrations in short-stature children born small for gestational age with and without growth hormone therapy. J Int Med Res 2017; 46:761-772. [PMID: 28974136 PMCID: PMC5971506 DOI: 10.1177/0300060517723183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Objective
To investigate the basal amino acid metabolism and impact of growth hormone (GH) therapy in short-stature children born small for gestational age (short SGA children). Methods In this age-matched case-control study, the basal blood levels of amino acids, asymmetric dimethylarginine (ADMA), and nitrite/nitrate (NOx) were compared between 24 short SGA children and 25 age-matched normal children. Changes in these parameters were assessed for 12 months in 12 short SGA children initiating GH therapy (Group A) and 12 age-matched short SGA children without GH therapy (Group B). Results The arginine levels were significantly lower in the short SGA than in normal children. The ADMA levels were significantly higher and NOx levels were significantly lower in the short SGA than normal children. In Group A, the ADMA level was significantly lower and NOx level was significantly higher at 6 months than at baseline. At 12 months, the ADMA level in Group A began to increase, but the NOx level remained the same. Group B showed no significant changes. Conclusions This study is the first to show that ADMA is promoted and nitric oxide is suppressed in short SGA children and that GH therapy affects the production of ADMA and nitric oxide.
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Affiliation(s)
- Hironori Nagasaka
- 1 Department of Pediatrics, Takarazuka City Hospital, Takarazuka, Japan
| | - Ichiro Morioka
- 2 Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mayuko Takuwa
- 1 Department of Pediatrics, Takarazuka City Hospital, Takarazuka, Japan
| | - Mariko Nakacho
- 1 Department of Pediatrics, Takarazuka City Hospital, Takarazuka, Japan
| | - Mayumi Yoshida
- 1 Department of Pediatrics, Takarazuka City Hospital, Takarazuka, Japan
| | - Akihito Ishida
- 3 Kobe Children's Primary Emergency Medical Center, Kobe, Japan
| | - Satoshi Hirayama
- 4 Department of Clinical Laboratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Takashi Miida
- 4 Department of Clinical Laboratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Hirokazu Tsukahara
- 5 Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tohru Yorifuji
- 6 Division of Pediatric Endocrinology and Metabolism, Children's Medical Center, Osaka City General Hospital, Osaka, Japan
| | - Kazumoto Iijima
- 2 Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
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24
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Ma J, Feng Y, Jiang S, Li X. Altered cellular metabolism of HepG2 cells caused by microcystin-LR. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 225:610-619. [PMID: 28336091 DOI: 10.1016/j.envpol.2017.03.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 01/20/2017] [Accepted: 03/14/2017] [Indexed: 06/06/2023]
Abstract
This study aimed to evaluate the possible effects of microcystin-LR (MC-LR) exposure on the metabolism and drug resistance of human hepatocellular carcinoma (HepG2) cells. For this purpose, we first conducted an experiment to make sure that MC-LR could penetrate the HepG2 cell membrane effectively. The transcriptional levels of phase I (such as CYP2E1, CYP3A4, and CYP26B1) and phase II (such as EPHX1, SULTs, and GSTM) enzymes and export pump genes (such as MRP1 and MDR1) were altered by MC-LR-exposure for 24 h, indicating that MC-LR treatment may destabilize the metabolism of HepG2 cells. Further research showed that the CYP inducers omeprazole, ethanol, and rifampicin inhibited cell viability, in particular, ethanol, a CYP2E1 inducer, induced ROS generation, lipid peroxidation, and apoptosis in HepG2 cells treated with MC-LR. The CYP2E1 inhibitor chlormethiazole inhibited ROS generation, mitochondrial membrane potential loss, caspase-3 activity, and cytotoxicity caused by MC-LR. Meanwhile, the results also showed that co-incubation with the ROS scavenger l-ascorbic acid and MC-LR decreased ROS levels and effectively prevented apoptosis. These findings provide an interesting mechanistic explanation of cellular metabolism associated with MC-LR, i.e., MC-LR-exposure exerted toxicity on HepG2 cells and induced apoptosis of HepG2 cells via promoting CYP2E1 expression and inducing excessive ROS in HepG2 cells.
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Affiliation(s)
- Junguo Ma
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yiyi Feng
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China
| | - Siyu Jiang
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xiaoyu Li
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
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25
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Subramaniyan B, Kumar V, Mathan G. Effect of sodium salt of Butrin, a novel compound isolated from Butea monosperma flowers on suppressing the expression of SIRT1 and Aurora B kinase-mediated apoptosis in colorectal cancer cells. Biomed Pharmacother 2017; 90:402-413. [PMID: 28390310 DOI: 10.1016/j.biopha.2017.03.086] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 03/26/2017] [Accepted: 03/26/2017] [Indexed: 02/07/2023] Open
Abstract
The infrequent manifestation of SIRT1 and Aurora B kinase has shown to play a pivotal role in colorectal cancer (CRC) progression by regulating Wnt signaling pathway. The present study investigates the signaling events that regulate the modulation of SIRT1 and Aurora B kinase expression and it's mediated cell proliferation in SW480 human primary adenocarcinoma CRC cells using Butea monosperma floral compounds (BMFC). In this, cell viability, mitochondrial mediated apoptosis, cell cycle arrest and inhibition of Wnt pathway were examined. Interestingly, the active novel compound, sodium salt of butrin, from BMFC significantly enhances the apoptosis activity, where SIRT1 and Aurora B kinase were ectopically overexpressed in CRC cells. Moreover, mRNA and protein expressions analysis indicates that the expression of GSK-3β, β-catenin, cyclin D1, pAKT, TGF-3β, SIRT1 and Aurora B kinase were down regulated in BMFC treated cells. These findings provide valuable information that the active BMFC having great impact on SIRT1 and Aurora B kinase mediated Wnt signaling down regulation in SW480 CRC cells.
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Affiliation(s)
- Boopathi Subramaniyan
- Department of Biomedical Science, School of Basic Medical Science, Bharathidasan University, Tiruchirappalli, 620 024 Tamilnadu, India
| | - Vijay Kumar
- Virology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110 067, India
| | - Ganeshan Mathan
- Department of Biomedical Science, School of Basic Medical Science, Bharathidasan University, Tiruchirappalli, 620 024 Tamilnadu, India.
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26
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McCarty MF. Supplementation with Phycocyanobilin, Citrulline, Taurine, and Supranutritional Doses of Folic Acid and Biotin-Potential for Preventing or Slowing the Progression of Diabetic Complications. Healthcare (Basel) 2017; 5:E15. [PMID: 28335416 PMCID: PMC5371921 DOI: 10.3390/healthcare5010015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 02/23/2017] [Accepted: 03/06/2017] [Indexed: 02/07/2023] Open
Abstract
Oxidative stress, the resulting uncoupling of endothelial nitric oxide synthase (eNOS), and loss of nitric oxide (NO) bioactivity, are key mediators of the vascular and microvascular complications of diabetes. Much of this oxidative stress arises from up-regulated nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity. Phycocyanobilin (PhyCB), the light-harvesting chromophore in edible cyanobacteria such as spirulina, is a biliverdin derivative that shares the ability of free bilirubin to inhibit certain isoforms of NADPH oxidase. Epidemiological studies reveal that diabetics with relatively elevated serum bilirubin are less likely to develop coronary disease or microvascular complications; this may reflect the ability of bilirubin to ward off these complications via inhibition of NADPH oxidase. Oral PhyCB may likewise have potential in this regard, and has been shown to protect diabetic mice from glomerulosclerosis. With respect to oxidant-mediated uncoupling of eNOS, high-dose folate can help to reverse this by modulating the oxidation status of the eNOS cofactor tetrahydrobiopterin (BH4). Oxidation of BH4 yields dihydrobiopterin (BH2), which competes with BH4 for binding to eNOS and promotes its uncoupling. The reduced intracellular metabolites of folate have versatile oxidant-scavenging activity that can prevent oxidation of BH4; concurrently, these metabolites promote induction of dihydrofolate reductase, which functions to reconvert BH2 to BH4, and hence alleviate the uncoupling of eNOS. The arginine metabolite asymmetric dimethylarginine (ADMA), typically elevated in diabetics, also uncouples eNOS by competitively inhibiting binding of arginine to eNOS; this effect is exacerbated by the increased expression of arginase that accompanies diabetes. These effects can be countered via supplementation with citrulline, which efficiently enhances tissue levels of arginine. With respect to the loss of NO bioactivity that contributes to diabetic complications, high dose biotin has the potential to "pinch hit" for diminished NO by direct activation of soluble guanylate cyclase (sGC). High-dose biotin also may aid glycemic control via modulatory effects on enzyme induction in hepatocytes and pancreatic beta cells. Taurine, which suppresses diabetic complications in rodents, has the potential to reverse the inactivating impact of oxidative stress on sGC by boosting synthesis of hydrogen sulfide. Hence, it is proposed that concurrent administration of PhyCB, citrulline, taurine, and supranutritional doses of folate and biotin may have considerable potential for prevention and control of diabetic complications. Such a regimen could also be complemented with antioxidants such as lipoic acid, N-acetylcysteine, and melatonin-that boost cellular expression of antioxidant enzymes and glutathione-as well as astaxanthin, zinc, and glycine. The development of appropriate functional foods might make it feasible for patients to use complex nutraceutical regimens of the sort suggested here.
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Affiliation(s)
- Mark F McCarty
- Catalytic Longevity, 7831 Rush Rose Dr., Apt. 316, Carlsbad, CA 92009, USA.
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27
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Wu T, Zhan Q, Zhang T, Ang S, Ying J, He K, Zhang S, Xue Y, Tang M. The protective effects of resveratrol, H 2S and thermotherapy on the cell apoptosis induced by CdTe quantum dots. Toxicol In Vitro 2017; 41:106-113. [PMID: 28219723 DOI: 10.1016/j.tiv.2017.02.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 12/19/2016] [Accepted: 02/17/2017] [Indexed: 02/07/2023]
Abstract
Quantum dots (QDs) could be used in the field of biology and medicine as excellent nano-scale fluorescent probes due to their unique optical properties, but the adverse effects of QDs are always the obstruction for its usage in living organisms. In this study, we observed that CdTe QDs exposure decreased the cell viability while increased the apoptosis rates in the L929 cells. Apart from QD-induced oxidative stress indicated by excessive ROS generation, three signal transductions, including Akt, p38 and JNK, played important roles on the regulation of cell apoptosis by CdTe QDs exposure as well. In order to reduce the toxicity of CdTe QDs, we explored the protective effects of three treatments, i.e. resveratrol, H2S and thermotherapy at 43°C, against the cell apoptosis elicited by CdTe QDs. The results showed that resveratrol, H2S and thermotherapy at 43°C were capable of attenuating cell apoptosis and intercellular ROS production through inhibiting signal pathways of Akt, p38 and JNK, respectively. As there is only limited number of exogenous treatments reported to diminish the toxicity of QDs, our findings will provide a novel insight for researchers who try to reduce or even eliminate the adverse health effects of QDs.
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Affiliation(s)
- Tianshu Wu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China
| | - Qingling Zhan
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China
| | - Ting Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China
| | - Shengjun Ang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China
| | - Jiali Ying
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China
| | - Keyu He
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China
| | - Shihan Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China
| | - Yuying Xue
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China
| | - Meng Tang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, & Collaborative Innovation Center of Suzhou Nano Science and Technology, Southeast University, Nanjing 210009, China; Jiangsu key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210009, China.
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Campos-Mota GP, Navia-Pelaez JM, Araujo-Souza JC, Stergiopulos N, Capettini LSA. Role of ERK1/2 activation and nNOS uncoupling on endothelial dysfunction induced by lysophosphatidylcholine. Atherosclerosis 2016; 258:108-118. [PMID: 28235709 DOI: 10.1016/j.atherosclerosis.2016.11.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIMS Lysophosphatidylcholine (LPC) - a main component of oxidized LDL - is involved in endothelial dysfunction that precedes atherosclerosis, with an increased superoxide anions and a reduced NO production via endothelial NO synthase (eNOS) uncoupling. However, there is no evidence about the mechanisms involved in neuronal NOS (nNOS) uncoupling. Extracellular signal-regulated kinase (ERK) is related to the control of NO production and inflammatory gene transcription activation in atherosclerosis. Our aim was to investigate the role of nNOS/ERK1/2 pathway on endothelial dysfunction induced by LPC, in mouse aorta and human endothelial cells. METHODS Thoracic aorta from wild type mice was used to perform vascular reactivity studies in the presence or absence of LPC. Human endothelial cells were used to investigate the effect of LPC on expression of nNOS and his products NO and H2O2. RESULTS LPC reduced acetylcholine (ACh)-induced vasodilation in mouse aorta (EmaxCT/LPC = ∼95 ± 2/62 ± 3%, p = 0.0004) and increased phenylephrine-induced vasoconstriction (EmaxCT/LPC = ∼4 ± 0,1/6 ± 0,1 mN/mm, p = 0.0002), with a reduction in NO (fluorescence intensityCT/LPC = 91 ± 3/62±2 × 103, p = 0.0002) and H2O2 (fluorescence intensityCT/LPC = ∼16 ± 0,8/10 ± 0,7 × 103, p = 0.0041) production evocated by ACh. An inhibition of nNOS by TRIM (EmaxCT/CT+TRIM = ∼93 ± 1/43 ± 3%, p = 0,0048; EmaxLPC/LPC+TRIM = ∼62 ± 3/65 ± 3%) or H2O2 degradation by catalase (EmaxCT/CT+cat = ∼93 ± 1/46 ± 2%, p < 0,001; EmaxLPC/LPC+cat = ∼62,8 ± 3,2/60,5 ± 4,7%) reduced the relaxation in the control but not in LPC group. PD98059, an ERK1/2 inhibitor, abolished the increase in vasoconstriction in LPC-treated vessels (EmaxLPC/LPC+PD = ∼6 ± 0,1/3 ± 0,1 mN/mm, p = 0.0001). LPC also reduced the dimer/monomer proportion and increased nNOSser852 phosphorylation. CONCLUSIONS LPC induced nNOS uncoupling and nNOSSer852 phosphorylation, reduced NO and H2O2 production and improved superoxide production by modulating ERK1/2 activity in human and murine endothelial cells.
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Affiliation(s)
- Gianne P Campos-Mota
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Juliana M Navia-Pelaez
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Jessica Cristina Araujo-Souza
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Nikos Stergiopulos
- Laboratory of Hemodynamics and Cardiovascular Technology, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, BM 5128 Station 17, CH-1015 Lausanne, Switzerland
| | - Luciano S A Capettini
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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29
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The crosstalk between astaxanthin, fatty acids and reactive oxygen species in heterotrophic Chlorella zofingiensis. ALGAL RES 2016. [DOI: 10.1016/j.algal.2016.08.015] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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30
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McCarty MF. Asymmetric Dimethylarginine Is a Well Established Mediating Risk Factor for Cardiovascular Morbidity and Mortality-Should Patients with Elevated Levels Be Supplemented with Citrulline? Healthcare (Basel) 2016; 4:healthcare4030040. [PMID: 27417628 PMCID: PMC5041041 DOI: 10.3390/healthcare4030040] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 06/21/2016] [Accepted: 06/27/2016] [Indexed: 02/07/2023] Open
Abstract
The arginine metabolite asymmetric dimethylarginine (ADMA) is a competitive inhibitor and uncoupler of endothelial nitric oxide synthase (eNOS), an enzyme that acts in multifarious ways to promote cardiovascular health. This phenomenon likely explains, at least in part, why elevated ADMA has been established as an independent risk factor for cardiovascular events, ventricular hypertrophy, and cardiovascular mortality. Fortunately, the suppressive impact of ADMA on eNOS activity can be offset by increasing intracellular arginine levels with supplemental citrulline. Although the long-term impact of supplemental citrulline on cardiovascular health in patients with elevated ADMA has not yet been studied, shorter-term clinical studies of citrulline administration demonstrate effects suggestive of increased NO synthesis, such as reductions in blood pressure and arterial stiffness, improved endothelium-dependent vasodilation, increased erection hardness, and increased ejection fractions in patients with heart failure. Supplemental citrulline could be a practical option for primary or secondary prevention of cardiovascular events and mortality, as it is inexpensive, has a mild flavor, and is well tolerated in doses (3-6 g daily) that can influence eNOS activity. Large and long-term clinical trials, targeting patients at high risk for cardiovascular events in whom ADMA is elevated, are needed to evaluate citrulline's potential for aiding cardiovascular health.
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Affiliation(s)
- Mark F McCarty
- Catalytic Longevity, 7831 Rush Rose Dr., Apt. 316, Carlsbad, CA 92009, USA.
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Systemic saturated lysophosphatidylcholine is associated with hepatic function in patients with liver cirrhosis. Prostaglandins Other Lipid Mediat 2016; 124:27-33. [DOI: 10.1016/j.prostaglandins.2016.06.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 06/01/2016] [Accepted: 06/01/2016] [Indexed: 12/11/2022]
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32
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Wang YW, Zhang JH, Yu Y, Yu J, Huang L. Inhibition of Store-Operated Calcium Entry Protects Endothelial Progenitor Cells from H2O2-Induced Apoptosis. Biomol Ther (Seoul) 2016; 24:371-9. [PMID: 27169819 PMCID: PMC4930280 DOI: 10.4062/biomolther.2015.130] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 11/09/2015] [Accepted: 11/17/2015] [Indexed: 01/09/2023] Open
Abstract
Store-operated calcium entry (SOCE), a major mode of extracellular calcium entry, plays roles in a variety of cell activities. Accumulating evidence indicates that the intracellular calcium ion concentration and calcium signaling are critical for the responses induced by oxidative stress. The present study was designed to investigate the potential effect of SOCE inhibition on H2O2-induced apoptosis in endothelial progenitor cells (EPCs), which are the predominant cells involved in endothelial repair. The results showed that H2O2-induced EPC apoptosis was reversed by SOCE inhibition induced either using the SOCE antagonist ML-9 or via silencing of stromal interaction molecule 1 (STIM1), a component of SOCE. Furthermore, SOCE inhibition repressed the increases in intracellular reactive oxygen species (ROS) levels and endoplasmic reticulum (ER) stress and ameliorated the mitochondrial dysfunction caused by H2O2. Our findings provide evidence that SOCE inhibition exerts a protective effect on EPCs in response to oxidative stress induced by H2O2 and may serve as a potential therapeutic strategy against vascular endothelial injury.
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Affiliation(s)
- Yan-Wei Wang
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, People's Republic of China
| | - Ji-Hang Zhang
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, People's Republic of China
| | - Yang Yu
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, People's Republic of China
| | - Jie Yu
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, People's Republic of China
| | - Lan Huang
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, People's Republic of China
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Vázquez-Medina JP, Dodia C, Weng L, Mesaros C, Blair IA, Feinstein SI, Chatterjee S, Fisher AB. The phospholipase A2 activity of peroxiredoxin 6 modulates NADPH oxidase 2 activation via lysophosphatidic acid receptor signaling in the pulmonary endothelium and alveolar macrophages. FASEB J 2016; 30:2885-98. [PMID: 27178323 DOI: 10.1096/fj.201500146r] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 04/26/2016] [Indexed: 01/04/2023]
Abstract
Peroxiredoxin 6 (Prdx6) is essential for activation of NADPH oxidase type 2 (NOX2) in pulmonary microvascular endothelial cells (PMVECs), alveolar macrophages (AMs), and polymorphonuclear leukocytes. Angiotensin II and phorbol ester increased superoxide/H2O2 generation in PMVECs, AMs, and isolated lungs from wild-type (WT) mice, but had much less effect on cells or lungs from Prdx6-null or Prdx6-D140A-knock-in mice that lack the phospholipase A2 activity (PLA2) of Prdx6; addition of either lysophosphatidylcholine (LPC) or lysophosphatidic acid (LPA) to cells restored their oxidant generation. The generation of LPC by PMVECs required Prdx6-PLA2 We propose that Prdx6-PLA2 modulates NOX2 activation by generation of LPC that is converted to LPA by the lysophospholipase D activity of autotaxin (ATX/lysoPLD). Inhibition of lysoPLD with HA130 (cells,10 μM; lungs, 20 μM; IC50, 29 nM) decreased agonist-induced oxidant generation. LPA stimulates pathways regulated by small GTPases through binding to G-protein-coupled LPA receptors (LPARs). The LPAR blocker Ki16425 (cells, 10 μM; lungs, 25 μM; Ki, 0.34 μM) or cellular knockdown of LPAR type 1 decreased oxidant generation and blocked translocation of rac1 to plasma membrane. Thus, Prdx6-PLA2 modulates NOX2 activation through generation of LPC for conversion to LPA; binding of LPA to LPAR1 signals rac activation.-Vázquez-Medina, J. P., Dodia, C., Weng, L., Mesaros, C., Blair, I. A., Feinstein, S. I., Chatterjee, S., Fisher, A. B. The phospholipase A2 activity of peroxiredoxin 6 modulates NADPH oxidase 2 activation via lysophosphatidic acid receptor signaling in the pulmonary endothelium and alveolar macrophages.
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Affiliation(s)
- José Pablo Vázquez-Medina
- Institute for Environmental Medicine, Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and
| | - Chandra Dodia
- Institute for Environmental Medicine, Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and
| | - Liwei Weng
- Center for Cancer Pharmacology, Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA Center for Excellence in Environmental Toxicology, Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Clementina Mesaros
- Center for Cancer Pharmacology, Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA Center for Excellence in Environmental Toxicology, Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ian A Blair
- Center for Cancer Pharmacology, Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA Center for Excellence in Environmental Toxicology, Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sheldon I Feinstein
- Institute for Environmental Medicine, Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and
| | - Shampa Chatterjee
- Institute for Environmental Medicine, Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and
| | - Aron B Fisher
- Institute for Environmental Medicine, Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; and
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Li M, Ma Z, Zhu Y, Xia H, Yao M, Chu X, Wang X, Yang K, Yang M, Zhang Y, Mao C. Toward a Molecular Understanding of the Antibacterial Mechanism of Copper-Bearing Titanium Alloys against Staphylococcus aureus. Adv Healthc Mater 2016; 5:557-66. [PMID: 26692564 PMCID: PMC4785048 DOI: 10.1002/adhm.201500712] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 10/15/2015] [Indexed: 12/14/2022]
Abstract
The antibacterial mechanism of the Cu-containing materials has not been fully understood although such understanding is crucial for the sustained clinical use of Cu-containing antibacterial materials such as bone implants. The aim of this study is to investigate the molecular mechanisms by which the Gram-positive Staphylococcus aureus is inactivated through Cu-bearing titanium alloys (Ti6Al4V5Cu). Cu ions released from the alloys are found to contribute to lethal damage of bacteria. They destroy the permeability of the bacterial membranes, resulting in the leakage of reducing sugars and proteins from the cells. They also promote the generation of bacteria-killing reactive oxygen species (ROS). The ROS production is confirmed by several assays including fluorescent staining of intracellular oxidative stress, detection of respiratory chain activity, and measurement of the levels of lipid peroxidation, catalase, and glutathione. Furthermore, the released Cu ions show obvious genetic toxicity by interfering the replication of nuc (species-specific) and 16SrRNA genes, but with no effect on the genome integrity. All of these effects lead to the antibacterial effect of Ti6Al4V5Cu. Collectively, our work reconciles the conflicting antibacterial mechanisms of Cu-bearing metallic materials or nanoparticles reported in the literature and highlights the potential use of Ti6Al4V5Cu alloys in inhibiting bacterial infections.
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Affiliation(s)
- Mei Li
- Department of Orthopedics, Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, 510010, China
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Zheng Ma
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China
| | - Ye Zhu
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK, 73019, USA
| | - Hong Xia
- Department of Orthopedics, Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, 510010, China
| | - Mengyu Yao
- Department of Orthopedics, Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, 510010, China
| | - Xiao Chu
- Department of Orthopedics, Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, 510010, China
| | - Xiaolan Wang
- Department of Orthopedics, Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, 510010, China
| | - Ke Yang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China
| | - Mingying Yang
- Institute of Applied Bioresource Research, College of Animal Science, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, China
| | - Yu Zhang
- Department of Orthopedics, Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, 510010, China
| | - Chuanbin Mao
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK, 73019, USA
- School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China
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Voge NV, Perera R, Mahapatra S, Gresh L, Balmaseda A, Loroño-Pino MA, Hopf-Jannasch AS, Belisle JT, Harris E, Blair CD, Beaty BJ. Metabolomics-Based Discovery of Small Molecule Biomarkers in Serum Associated with Dengue Virus Infections and Disease Outcomes. PLoS Negl Trop Dis 2016; 10:e0004449. [PMID: 26913918 PMCID: PMC4768770 DOI: 10.1371/journal.pntd.0004449] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 01/20/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Epidemic dengue fever (DF) and dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS) are overwhelming public health capacity for diagnosis and clinical care of dengue patients throughout the tropical and subtropical world. The ability to predict severe dengue disease outcomes (DHF/DSS) using acute phase clinical specimens would be of enormous value to physicians and health care workers for appropriate triaging of patients for clinical management. Advances in the field of metabolomics and analytic software provide new opportunities to identify host small molecule biomarkers (SMBs) in acute phase clinical specimens that differentiate dengue disease outcomes. METHODOLOGY/PRINCIPAL FINDINGS Exploratory metabolomic studies were conducted to characterize the serum metabolome of patients who experienced different dengue disease outcomes. Serum samples from dengue patients from Nicaragua and Mexico were retrospectively obtained, and hydrophilic interaction liquid chromatography (HILIC)-mass spectrometry (MS) identified small molecule metabolites that were associated with and statistically differentiated DHF/DSS, DF, and non-dengue (ND) diagnosis groups. In the Nicaraguan samples, 191 metabolites differentiated DF from ND outcomes and 83 differentiated DHF/DSS and DF outcomes. In the Mexican samples, 306 metabolites differentiated DF from ND and 37 differentiated DHF/DSS and DF outcomes. The structural identities of 13 metabolites were confirmed using tandem mass spectrometry (MS/MS). Metabolomic analysis of serum samples from patients diagnosed as DF who progressed to DHF/DSS identified 65 metabolites that predicted dengue disease outcomes. Differential perturbation of the serum metabolome was demonstrated following infection with different DENV serotypes and following primary and secondary DENV infections. CONCLUSIONS/SIGNIFICANCE These results provide proof-of-concept that a metabolomics approach can be used to identify metabolites or SMBs in serum specimens that are associated with distinct DENV infections and disease outcomes. The differentiating metabolites also provide insights into metabolic pathways and pathogenic and immunologic mechanisms associated with dengue disease severity.
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Affiliation(s)
- Natalia V. Voge
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Rushika Perera
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Sebabrata Mahapatra
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Lionel Gresh
- Sustainable Sciences Institute, Managua, Nicaragua
| | - Angel Balmaseda
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministry of Health, Managua, Nicaragua
| | - María A. Loroño-Pino
- Laboratorio de Arbovirología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatán, México
| | - Amber S. Hopf-Jannasch
- Bindley Bioscience Center, Purdue University, West Lafayette, Indiana, United States of America
| | - John T. Belisle
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Carol D. Blair
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Barry J. Beaty
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
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Otunctemur A, Ozbek E, Sahin S, Ozcan L, Dursun M, Polat EC, Cekmen M, Ozsoy OD, Erkoc M, Danis E, Bozkurt M. Low serum insulin-like growth factor-1 in patients with erectile dysfunction. Basic Clin Androl 2016; 26:1. [PMID: 26823979 PMCID: PMC4730635 DOI: 10.1186/s12610-015-0028-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 12/18/2015] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVE Endothelial dysfunction and microvascular damage play a crurical role in the pathogenesis of erectile dysfunction (ED). Insulin-like growth factor-1 (IGF-1) is one of the growth factors that have a wide range of biologic effects. IGF-1 is an important mediator of cell growth, differentiation and transformation in various tissues. The purpose of the current study was to determine the association between IGF-1 levels and ED. MATERIALS AND METHODS All men were evaluated for ED and divided into two groups: 80 patients suffering from ED for > 1 year and 80 subjects without ED were enrolled as a control group in this study. Diagnosis of ED was based on the International Index of Erectile Function Score-5. IGF-1 levels were measured in serum by an automated chemiluminescence immunoassay. The relationship between IGF-1 levels and ED scores in patients was statistically evaluated. RESULTS The mean age of patients in ED group was 60.4 ± 11.3 years and 55.4 ± 9.6 in control group. The plasma IGF-1 levels were significantly lower in ED than in control group (96.5 ± 38.3 and 132.5 ± 53.3 ng/ mL, respectively, P < 0.001). The IGF-1 levels were positively correlated with ED score (r = 0.623, P < 0.01). CONCLUSION In this study serum IGF-1 levels were found to be associated with endothelial dysfunction that predicts ED. Serum IGF-1 level appears to be a specific predictor of ED, and it might be used in early prediction of ED in male population.
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Affiliation(s)
- Alper Otunctemur
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Emin Ozbek
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Suleyman Sahin
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Levent Ozcan
- Department of Urology, Derince Training and Research Hospital, Kocaeli, Turkey
| | - Murat Dursun
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Emre Can Polat
- Department of Urology, Istanbul Medipol University, School of Medicine, Istanbul, Turkey
| | - Mustafa Cekmen
- Department of Biochemistry, Kocaeli University, School of Medicine, Kocaeli, Turkey
| | - Ozgur Doga Ozsoy
- Department of Biochemistry, Kocaeli University, School of Medicine, Kocaeli, Turkey
| | - Mustafa Erkoc
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Eyup Danis
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Muammer Bozkurt
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
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Does the ADMA/DDAH/NO pathway modulate early regression of left ventricular hypertrophy with esmolol? Med Hypotheses 2015; 87:44-7. [PMID: 26826640 DOI: 10.1016/j.mehy.2015.12.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 12/08/2015] [Accepted: 12/15/2015] [Indexed: 11/21/2022]
Abstract
Hypertensive left ventricular hypertrophy (LVH) is a maladaptive response to chronic pressure overload and a strong independent risk factor for cardiovascular disease. Regression of LVH is associated with improved prognosis. Regression of LVH with antihypertensive therapy (angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, beta-blockers, calcium channel blockers, and diuretics) has been reported, although only after long-term treatment. Asymmetrical dimethylarginine (ADMA), the most potent endogenous NO synthase inhibitor, is emerging as an important cardiovascular risk factor in patients with arterial hypertension and LVH, and dimethylarginine dimethylaminohydrolase (DDAH) is the mechanism that most frequently leads to accumulation of ADMA (plasma ADMA is cleared in small part by renal excretion, although the bulk of ADMA is degraded by DDAH). Left ventricular mass is strongly modulated by the NO system. As an important inhibitor of the bioavailability of NO, ADMA is an underlying mechanism of LVH. Beta-blockers can induce regression of LVH and reduced plasma ADMA levels. Oxidative stress is increased in patients with LVH, and this in turn increases generation of ADMA. In a previous preclinical study of spontaneously hypertensive rats, we found that short-term treatment (48 h) with esmolol reverses early LVH, increases the bioavailability of NO, and improves antioxidant status in plasma. Therefore, we propose that the ADMA/DDAH/NO pathway could modulate early regression of LVH with esmolol.
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Yin J, Huang F, Yi Y, Yin L, Peng D. EGCG attenuates atherosclerosis through the Jagged-1/Notch pathway. Int J Mol Med 2015; 37:398-406. [PMID: 26648562 DOI: 10.3892/ijmm.2015.2422] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 11/19/2015] [Indexed: 11/06/2022] Open
Abstract
Atherosclerosis is the most common cause of cardiovascular diseases worldwide. Oxidized low-density lipoprotein (ox-LDL) is a particularly important risk factor in the pathogenesis of atherosclerosis. Accumulating evidence has indicated that epigallocatechin-3-gallate (EGCG; a catechin found in the popular beverage, greent tea) protects against ox-LDL-induced atherosclerosis. However, the underlying mechanisms remain unclear. In the present study, ox-LDL (100 mg/l) induced damage to, and the apoptosis of human umbilical vein endothelial cells (HUVECs) by reducing endothelial nitric oxide synthase (eNOS) expression and promoting inducible nitric oxide synthase (iNOS) expression; these effects were abrogated by the addition of 50 µM EGCG. Furthermore, ox-LDL rapidly activated the membrane translocation of p22phox, and altered the protein expression of Jagged-1 and Notch pathway-related proteins [Math1, hairy and enhancer of split (HES)1 and HES5]; these effects were also prevented by pre-treatment with 50 µM EGCG. In addition, Jagged-1 played a significant role in the EGCG-mediated protection against ox-LDL-induced apoptosis and ox-LDL‑diminished cell adhesion in the HUVECs. Finally, EGCG inhibited high-fat diet (HFD)-induced atherosclerosis in apolipoprotein E (ApoE) knockout (ApoE-KO) mice through the Jagged-1/Notch pathway. Taken together, these findings demonstrate that 50 µM EGCG protects against ox-LDL-induced endothelial dysfunction through the Jagged-1/Notch signaling pathway. Moreover, our data provide insight into the possible molecular mechanisms through which EGCG attenuates ox-LDL‑induced vascular endothelial dysfunction.
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Affiliation(s)
- Jianguo Yin
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Fang Huang
- Department of Cardiology, The First Hospital of Changsha, Changsha, Hunan 410011, P.R. China
| | - Yuhong Yi
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Liang Yin
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Daoquan Peng
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
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Li X, Ma J, Wang J. Cytotoxicity, oxidative stress, and apoptosis in HepG2 cells induced by ionic liquid 1-methyl-3-octylimidazolium bromide. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 120:342-348. [PMID: 26099465 DOI: 10.1016/j.ecoenv.2015.06.018] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 06/09/2015] [Accepted: 06/10/2015] [Indexed: 06/04/2023]
Abstract
The present study aimed to determine the cytotoxicity of 1-methyl-3-octylimidazolium bromide ([C8mim]Br) on the human hepatocellular carcinoma (HepG2) cells in order to elucidate the biochemical and molecular mechanism of [C8mim]Br-cytotoxicity. For this purpose, cell viability, oxidative stress, apoptosis, caspase activity, and apoptosis-related gene expression in HepG2 cells following [C8mim]Br-exposure were evaluated. The results showed that viability of HepG2 cells was decreased by [C8mim]Br-exposure in a concentration-dependent pattern. Moreover, biochemical assays reveal that [C8mim]Br-exposure can induce apoptosis, cause overproduction of reactive oxygen species (ROS), inhibit superoxide dismutase and catalase, reduce glutathione content, and increase the cellular malondialdehyde level of HepG2 cells. The transcriptions of p53 and bax were markedly up-regulated while bcl-2 was significantly down-regulated in HepG2 cells after [C8mim]Br-exposure, suggesting that p53 and bcl-2 family may be involved in the cytotoxicity and apoptosis of HepG2 cells caused by [C8mim]Br. In addition, we also found that caspase-3, caspase-8, and caspase-9 were significantly activated in HepG2 cells following [C8mim]Br-exposure. Our results suggest that ROS may be a key early signal of [C8mim]Br-induced apoptosis and caspases play a key role in the initiation and execution of apoptosis of HepG2 cells.
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Affiliation(s)
- Xiaoyu Li
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Junguo Ma
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China
| | - Jianji Wang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China.
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Kim JS, Song KS, Yu IJ. Multiwall Carbon Nanotube-Induced DNA Damage and Cytotoxicity in Male Human Peripheral Blood Lymphocytes. Int J Toxicol 2015; 35:27-37. [PMID: 26268766 DOI: 10.1177/1091581815598749] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Carbon nanotubes (CNTs) have been introduced recently as a novel carrier system for both small and large therapeutic molecules. Biotin-functionalized single-wall CNTs have been conjugated with the anticancer agent taxoid using a cleavable linker, and multiwall carbon nanotubes (MWCNTs) conjugated with iron nanoparticles have been efficiently loaded with doxorubicin. The MWCNTs are effective transporters for biological macromolecules and drugs to target cells and tissues, thereby attracting the attention of the biomedical industry. Administrating MWCNTs for medical application invariably involves intravenous administration and ultimate contact with human peripheral blood lymphocytes (HPBLs), yet toxicological studies on the effect of MWCNTs on HPBLs are lacking. Accordingly, this study evaluated the cytotoxic and genotoxic effects of MWCNTs on healthy male HPBLs. Healthy male HPBLs were treated with MWCNTs at 3 different concentrations (12.5, 25, and 50 μg/mL) for 48 hours. Under these conditions, the MWCNTs induced significant cell growth retardation, DNA damage, and cytotoxicity. The MWCNT-treated HPBLs also exhibited an increased intracellular reactive oxygen species level during the experimental period, which leads to cell damage and death, proliferation inhibition, DNA damage, and an inflammatory response.
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Affiliation(s)
- Jin Sik Kim
- Bioconvergence Laboratory, Korea Conformity Laboratories, Incheon, Korea
| | - Kyung Seuk Song
- Bioconvergence Laboratory, Korea Conformity Laboratories, Incheon, Korea
| | - Il Je Yu
- Institute of Nanoproduct Safety Research, Hoseo University, Asan, Korea
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Bekpinar S, Vardagli D, Unlucerci Y, Can A, Uysal M, Gurdol F. Effect of rosiglitazone on asymmetric dimethylarginine metabolism in thioacetamide-induced acute liver injury. ACTA ACUST UNITED AC 2015. [PMID: 26224212 DOI: 10.1016/j.pathophys.2015.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Asymmetric dimethylarginine (ADMA), an endogenous nitric oxide synthase inhibitor, is metabolized in the liver by dimethylarginine dimethylaminohydrolase (DDAH). We aimed to investigate the effect of rosiglitazone, a peroxysome proliferator-activated receptor-gamma (PPAR-γ) agonist, on ADMA metabolism in acute liver injury. Male Sprague Dawley rats were injected thioacetamide (TAA; 500mgkg(-1)) intraperitoneally in order to induce acute liver injury. ADMA, SDMA and arginine levels were determined in plasma by the HPLC. Liver DDAH activity and malondialdehyde (MDA) levels were measured by spectrophotometric procedures. TAA injection caused marked increases in ALT and AST activities. Plasma ADMA levels were increased, while arginine levels and arginine/ADMA ratio were decreased. Liver DDAH activity was significantly diminished and MDA levels were elevated. In another group of animals which were treated with a PPAR-γ agonist (rosiglitazone, 5mgkg(-1)) daily via gastric intubation for a week prior to TAA injection, significant recoveries in DDAH activity and antioxidant status were observed when compared with solely TAA-injected animals. Rosiglitazone pretreatment improved the plasma arginine/ADMA ratio. Our findings indicated that PPAR-γ agonist rosiglitazone beneficially influenced hepatic metabolism of ADMA in TAA-induced acute liver damage.
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Affiliation(s)
- Seldag Bekpinar
- Department of Biochemistry, Istanbul Faculty of Medicine, Istanbul University, Capa, 34093, Istanbul, Turkey.
| | - Duygu Vardagli
- Department of Biochemistry, Istanbul Faculty of Medicine, Istanbul University, Capa, 34093, Istanbul, Turkey
| | - Yesim Unlucerci
- Department of Biochemistry, Istanbul Faculty of Medicine, Istanbul University, Capa, 34093, Istanbul, Turkey
| | - Ayten Can
- Department of Biochemistry, Istanbul Faculty of Medicine, Istanbul University, Capa, 34093, Istanbul, Turkey
| | - Mujdat Uysal
- Department of Biochemistry, Istanbul Faculty of Medicine, Istanbul University, Capa, 34093, Istanbul, Turkey
| | - Figen Gurdol
- Department of Biochemistry, Istanbul Faculty of Medicine, Istanbul University, Capa, 34093, Istanbul, Turkey
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Xiao HB, Liu ZK, Lu XY, Deng CN, Luo ZF. Icariin regulates PRMT/ADMA/DDAH pathway to improve endothelial function. Pharmacol Rep 2015; 67:1147-54. [PMID: 26481534 DOI: 10.1016/j.pharep.2015.04.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 04/21/2015] [Accepted: 04/27/2015] [Indexed: 11/19/2022]
Abstract
BACKGROUND Oxidative stress may affect PRMT/ADMA/DDAH (protein arginine methyltransferases/asymmetric dimethylarginine/dimethylarginine dimethylaminohydrolase) pathway to impair endothelial dysfunction. The present study was carried out to test the effect of icariin on endothelial function and the mechanisms responsible for this. METHODS Eighty mice at 12 weeks of age were separated randomly into four groups (n = 20): C57BL/6J control, untreated apolipoprotein E-deficient (ApoE(-/-)), two groups of icariin-treated (10 or 30 mg/kg body wt/day, intragastrically) ApoE(-/-). Primary human umbilical vein endothelial cells (HUVECs) were randomly divided into 7 groups: control group, vehicle of icariin (10 μmol/L) group, icariin (10 μmol/L) group, lysophosphatidylcholine (LPC) (10 μg/mL) group, LPC plus icariin (1 μmol/L) group, LPC plus icariin (3 μmol/L) group, and LPC plus icariin (10 μmol/L) group. RESULTS In ApoE(-/-) mice and primary HUVECs, icariin treatment decreased reactive oxygen species production, PRMT I expression, ADMA level, half-maximum effective concentration of ApoE(-/-) mice aortic rings. Icariin increased DDAH II expression, DDAH activity, maximal relaxation value and endothelium-dependent vasorelaxation in aortic rings from ApoE(-/-) mice (p < 0.05 or p < 0.01). CONCLUSIONS The present results suggest that icariin regulates PRMT/ADMA/DDAH pathway to improve endothelial function.
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Affiliation(s)
- Hong-Bo Xiao
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China.
| | - Zi-Kui Liu
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Xiang-Yang Lu
- Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, Changsha, China
| | | | - Zhi-Feng Luo
- Department of Basic Medicine, Xiangnan University, Chenzhou, China
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Wang N, Deng Y, Wei W, Song L, Wang Y. Serum containing Tongqiaohuoxue decoction suppresses glutamate-induced PC12 cell injury. Neural Regen Res 2015; 7:1125-31. [PMID: 25722704 PMCID: PMC4340028 DOI: 10.3969/j.issn.1673-5374.2012.15.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 04/10/2012] [Indexed: 11/18/2022] Open
Abstract
Glutamate application is an established method of inducing PC12 cell injury. PC12 cells were cultured with serum containing Tongqiaohuoxue decoction consisting of moschus, Carthamus tinctorius, Rhizoma chuanxiong, Semen pruni persicae, and Radix Paeoniae Rubra. After 24 hours of co-cultivation, glutamate (12.5 mM) was added to the culture medium. We found that serum containing Tongqiaohuoxue decoction prevented the increase in reactive oxygen species, and the decreases in superoxide dismutase and Na+-K+-ATPase activity, induced by glutamate. It also reduced the concentration of malondialdehyde, enhanced the mitochondrial transmembrane potential, inhibited the elevation of cellular calcium, and decreased phosphorylation of calmodulin-dependent protein kinase II. Thus, serum containing Tongqiaohuoxue decoction had protective effects on cell proliferation and membrane permeability in glutamate-injured PC12 cells.
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Affiliation(s)
- Ning Wang
- Institute of Clinical Pharmacology of Anhui Medical University, Hefei 230032, Anhui Province, China ; Anhui Anke Biotechnology (Group) Co., Ltd., Hefei 230088, Anhui Province, China ; Anhui Key Laboratory of Modernized Chinese Material, Anhui University of Traditional Chinese Medicine, Hefei 230031, Anhui Province, China
| | - Yi Deng
- Anhui Key Laboratory of Modernized Chinese Material, Anhui University of Traditional Chinese Medicine, Hefei 230031, Anhui Province, China
| | - Wei Wei
- Institute of Clinical Pharmacology of Anhui Medical University, Hefei 230032, Anhui Province, China
| | - Lihua Song
- Anhui Anke Biotechnology (Group) Co., Ltd., Hefei 230088, Anhui Province, China
| | - Yan Wang
- Anhui Key Laboratory of Modernized Chinese Material, Anhui University of Traditional Chinese Medicine, Hefei 230031, Anhui Province, China
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Oleoyl-lysophosphatidylcholine limits endothelial nitric oxide bioavailability by induction of reactive oxygen species. PLoS One 2014; 9:e113443. [PMID: 25419657 PMCID: PMC4242637 DOI: 10.1371/journal.pone.0113443] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Accepted: 10/23/2014] [Indexed: 12/25/2022] Open
Abstract
Previously we reported modulation of endothelial prostacyclin and interleukin-8 production, cyclooxygenase-2 expression and vasorelaxation by oleoyl- lysophosphatidylcholine (LPC 18:1). In the present study, we examined the impact of this LPC on nitric oxide (NO) bioavailability in vascular endothelial EA.hy926 cells. Basal NO formation in these cells was decreased by LPC 18:1. This was accompanied with a partial disruption of the active endothelial nitric oxide synthase (eNOS)- dimer, leading to eNOS uncoupling and increased formation of reactive oxygen species (ROS). The LPC 18:1-induced ROS formation was attenuated by the superoxide scavenger Tiron, as well as by the pharmacological inhibitors of eNOS, NADPH oxidases, flavin-containing enzymes and superoxide dismutase (SOD). Intracellular ROS-formation was most prominent in mitochondria, less pronounced in cytosol and undetectable in endoplasmic reticulum. Importantly, Tiron completely prevented the LPC 18:1-induced decrease in NO bioavailability in EA.hy926 cells. The importance of the discovered findings for more in vivo like situations was analyzed by organ bath experiments in mouse aortic rings. LPC 18:1 attenuated the acetylcholine-induced, endothelium dependent vasorelaxation and massively decreased NO bioavailability. We conclude that LPC 18:1 induces eNOS uncoupling and unspecific superoxide production. This results in NO scavenging by ROS, a limited endothelial NO bioavailability and impaired vascular function.
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Mangiferin induces cell death against rhabdomyosarcoma through sustained oxidative stress. Integr Med Res 2014; 4:66-75. [PMID: 28664112 PMCID: PMC5481771 DOI: 10.1016/j.imr.2014.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 07/31/2014] [Accepted: 08/01/2014] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Embryonic rhabdomyosarcoma (RD) is the most prevalent type of cancer among children. The present study aimed to investigate cell death induced by mangiferin in RD cells. METHODS The Inhibitory concentration (IC50) value of mangiferin was determined by an MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide) assay. Cell death induced by mangiferin against RD cells was determined through lactate dehydrogenase and nitric oxide release, intracellular calcium levels, reactive oxygen species generation, antioxidant status, mitochondrial calcium level, and mitochondrial membrane potential. Furthermore, acridine orange/ethidium bromide staining was performed to determine early/late apoptotic event. RESULTS Mangiferin induced cell death in RD cells with an IC50 value of 70 μM. The cytotoxic effect was reflected in a dose-dependent increase in lactate dehydrogenase leakage and nitric oxide release during mangiferin treatment. Mangiferin caused dose dependent increase in reactive oxygen species generation, intracellular calcium levels with subsequent decrease in antioxidant status (catalase, superoxide dismutase, glutathione-S-transferase, and glutathione) and loss of mitochondrial membrane potential in RD cells. Further data from fluorescence microscopy suggest that mangiferin caused cell shrinkage and nuclear condensation along with the occurrence of a late event of apoptosis. CONCLUSION Results of the present study shows that mangiferin can act as a promising chemopreventive agent against RD by inducing sustained oxidative stress.
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Relationship between dimethylarginine dimethylaminohydrolase gene variants and asymmetric dimethylarginine in patients with rheumatoid arthritis. Atherosclerosis 2014; 237:38-44. [PMID: 25194333 DOI: 10.1016/j.atherosclerosis.2014.07.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 07/06/2014] [Accepted: 07/29/2014] [Indexed: 01/17/2023]
Abstract
OBJECTIVE The aim of our study was to determine whether Dimethylarginine Dimethylaminohydrolase (DDAH) 1 and 2 gene polymorphisms - the main enzyme involved in ADMA degradation - are associated with high Asymmetric Dimethylarginine (ADMA) levels in Rheumatoid Arthritis (RA). METHODS Serum ADMA levels were measured in 201 individuals with RA [155 females median age 67 (59-73)]. Four tag SNPs in DDAH1 gene and 2 in the DDAH2 gene were genotyped by using the LightCycler™ System. ADMA was initially compared across the genetic variables using one-way ANOVA and then multivariate analysis examined each of the genes after adjustment for parameters of systemic inflammation and insulin resistance, namely erythrocyte sedimentation rate (ESR) and homeostatic model assessment (HOMA), which we have previously shown affect ADMA levels in RA. RESULTS No significant relationship between DDAH genetic variables and ADMA levels was established in ANOVA analysis. Multivariate model adjusted for age, HOMA and ESR did not demonstrate any significant association between DDAH variants and ADMA. CONCLUSION The results of our study give no evidence to suggest that increased ADMA levels in RA relate to DDAH genetic polymorphisms. Better understanding of disease-related factors and their interactions with traditional CV risk factors may represent mechanisms responsible for ADMA accumulation in this population.
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Otunctemur A, Sahin S, Ozbek E, Cekmen M, İnal A, Tulubas F, Dursun M, Besiroglu H, Koklu I. Lipoprotein-associated phospholipase A2 levels are associated with erectile dysfunction in patients without known coronary artery disease. Andrologia 2014; 47:706-10. [PMID: 25091174 DOI: 10.1111/and.12322] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2014] [Indexed: 12/22/2022] Open
Abstract
Endothelial dysfunction and microvascular damage play a crucial role in the pathogenesis of erectile dysfunction (ED). Lp-PLA2 is a calcium-independent member of the phospholipase A2 family and hydrolyses oxidised phospholipids on low-density lipoprotein (LDL) particles that plays a pivotal role in ox-LDL-induced endothelial dysfunction. The purpose of the current study was to determine the association between Lp-PLA2 levels and ED in patients without known coronary artery disease (CAD). All patients were evaluated for ED and divided into two groups: 88 patients suffering from ED for >1 year were enrolled as an experimental group and 88 patients without ED were enrolled as a control group in this study. Diagnosis of ED was based on the International Index of Erectile Function Score-5. Levels of Lp-PLA2 were measured in serum by colorimetric assay. The relationship between Lp-PLA2 levels and ED in patients was evaluated statistically. The mean age of patients with ED group was 59.4 ± 11.32 and 55.8 ± 9.67 in the control group. Plasma Lp-PLA2 levels were significantly higher in ED than in the control group (220.3 ± 66.90 and 174.8 ± 58.83 pg ml(-1) , respectively, P < 0.001). The Lp-PLA2 levels were negatively correlated with score of ED (r = -0.482, P < 0.05). In logistic regression analysis, enhanced plasma Lp-PLA2 levels result in approximately 1.2-fold increase in ED [1.22 (1.25-2.76)]. In this study, serum Lp-PLA2 levels were found to be associated with endothelial dysfunction predictive of ED. Serum Lp-PLA2 level appears to be a specific predictor of ED, and it may be used in early prediction of ED in the male population.
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Affiliation(s)
- A Otunctemur
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - S Sahin
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - E Ozbek
- Department of Urology, Ataturk Training and Research Hospital, Katip Celebi University, Izmir, Turkey
| | - M Cekmen
- Department of biochemistry, Kocaeli University, Kocaeli, Turkey
| | - A İnal
- Istanbul Medical Application and Research Center, Baskent University, Istanbul, Turkey
| | - F Tulubas
- Department of Biochemistry, Namik Kemal University, Tekirdag, Turkey
| | - M Dursun
- Department of Urology, Bahcelievler Government Hospital, Istanbul, Turkey
| | - H Besiroglu
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - I Koklu
- Department of Urology, Okmeydani Training and Research Hospital, Istanbul, Turkey
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Cao Y, Zheng L, Liu S, Peng Z, Zhang S. Total flavonoids from Plumula Nelumbinis suppress angiotensin II-induced fractalkine production by inhibiting the ROS/NF-κB pathway in human umbilical vein endothelial cells. Exp Ther Med 2014; 7:1187-1192. [PMID: 24940409 PMCID: PMC3991487 DOI: 10.3892/etm.2014.1554] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 01/28/2014] [Indexed: 11/29/2022] Open
Abstract
Angiotensin II (Ang II) is a neuroendocrine factor that promotes hypertension and has been implicated in vascular inflammation through the induction of reactive oxygen species (ROS) and proinflammatory genes in endothelial cells. However, relatively little attention has been paid to the effect of Ang II on fractalkine (FKN), an important chemokine involved in endothelial dysfunction. In the study, we aimed to investigate the protective role of total flavonoids from Plumula Nelumbinis (TFPN), the main component extracted from Semen Nelumbinis, in Ang II-induced oxidative stress injury in human umbilical vein endothelial cells (HUVECs). Furthermore, we studied whether TFPN could attenuate the Ang II-induced generation of ROS and the activation of nuclear factor-κB (NF-κB); whether these Ang II-induced effects were inhibited by apocynin (a nicotinamide adenine dinucleotide phosphate oxidase inhibitor) and pyrrolidine dithiocarbamate (an NF-κB inhibitor). In the present study, it was observed that total flavonoids from Plumula Nelumbinis (TFPN), the main component extracted from Semen Nelumbinis, concentration-dependently inhibited the FKN production induced by Ang II in human umbilical vein endothelial cells (HUVECs). Furthermore, TFPN attenuated the Ang II-induced generation of ROS and the activation of nuclear factor-κB (NF-κB); these Ang II-induced effects were also inhibited by apocynin (a nicotinamide adenine dinucleotide phosphate oxidase inhibitor) and pyrrolidine dithiocarbamate (an NF-κB inhibitor). In conclusion, the findings of the present study indicate that TFPN attenuate Ang II-induced upregulation of FKN by inhibiting the ROS/NF-κB pathway in HUVECs and thus have a suppressive effect on vascular inflammation.
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Affiliation(s)
- Yongwen Cao
- Department of Cardiology, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
| | - Lulu Zheng
- Department of Cardiology, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
| | - Shao Liu
- Department of Pharmacology, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
| | - Zhenyu Peng
- Department of Emergency, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Saidan Zhang
- Department of Cardiology, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
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Ballard KD, Mah E, Guo Y, Pei R, Volek JS, Bruno RS. Low-fat milk ingestion prevents postprandial hyperglycemia-mediated impairments in vascular endothelial function in obese individuals with metabolic syndrome. J Nutr 2013; 143:1602-10. [PMID: 23966328 DOI: 10.3945/jn.113.179465] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Greater intakes of low-fat dairy foods are associated with a lower risk of cardiovascular disease. The objective of this study was to examine whether acute low-fat milk ingestion would limit postprandial impairments in vascular endothelial function by limiting oxidative stress responses that decrease nitric oxide (NO) bioavailability. A randomized, double-blind, cross-over study was conducted in adults with metabolic syndrome (MetS) who ingested low-fat milk (475 mL) or an isocaloric volume of rice milk after an overnight fast. Brachial artery flow-mediated dilation (FMD), plasma glucose, malondialdehyde (MDA), arginine (ARG), and asymmetric dimethylarginine (ADMA) were assessed at 30-min intervals during the 3-h postprandial period. Participants' (n = 19) postprandial FMD responses were unaffected by low-fat milk but transiently decreased (P < 0.01) from 6.2 ± 0.8% (mean ± SEM) at baseline to 3.3 ± 0.7% at 30 min and 3.9 ± 0.6% at 60 min following rice milk consumption. Glucose and MDA increased to a greater extent in the rice milk trial (P < 0.001). The MDA area under the 3 h postprandial curve (AUC0-3 h) was correlated with glucose AUC0-3 h (r = 0.75; P < 0.01) and inversely related to FMD AUC0-3 h (r = -0.59; P < 0.01). ARG decreased following rice milk and increased with low-fat milk, whereas only rice milk increased ADMA:ARG. The ADMA:ARG AUC0-3 h was correlated with MDA AUC0-3 h (r = 0.55) and was inversely related to FMD AUC0-3 h (r = -0.52) (P < 0.05). These findings suggest that low-fat milk maintains vascular endothelial function in individuals with MetS by limiting postprandial hyperglycemia that otherwise increases lipid peroxidation and reduces NO bioavailability. This trial was registered at clinicaltrials.gov as NCT01411293.
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Plasma asymmetric dimethylarginine and adverse events in patients with atrial fibrillation referred for coronary angiogram. PLoS One 2013; 8:e71675. [PMID: 23951217 PMCID: PMC3737156 DOI: 10.1371/journal.pone.0071675] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 07/02/2013] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES Elevated plasma levels of asymmetric dimethylarginine (ADMA) have been reported to be associated with endothelial dysfunction, inflammation, and oxidative stress in multiple cardiovascular diseases. This study aimed to investigate whether ADMA was a predictor of clinical outcomes in atrial fibrillation (AF). METHODS AND RESULTS From 2006-2009, 990 individuals were referred to our institution for coronary angiography. Among these patients, 141 subjects with a diagnosis of AF, including 52 paroxysmal AF (PAF) and 89 non-paroxysmal AF (non-PAF) patients, were identified as the study population. Plasma ADMA levels were measured. An adverse event was defined as the occurrence of ischemic stroke or cardiovascular death. The ADMA levels were higher in AF than non-AF patients (0.50 ± 0.13 versus 0.45 ± 0.07 µmol/L; p<0.001). Besides, non-PAF patients had higher ADMA levels than PAF patients (0.52 ± 0.15 versus 0.48 ± 0.08 µmol/L; p<0.001). During the follow-up of 30.7±14.4 months, 21 patients (14.9%) experienced adverse events, including cardiovascular death in 7 patients and ischemic stroke in 14. ADMA level, CHA2DS2-VASc score, and left atrial diameter were independent predictors of adverse events in the multivariate analysis. At a cutoff-value of 0.55 µmol/L, the Kaplan-Meier survival analysis showed that patients with a high ADMA level had a higher event rate during the follow-up period. CONCLUSIONS A higher level of ADMA was a risk factor of adverse events in AF patients, which was independent from the CHA2DS2-VASc score. It deserves to further study whether ADMA could potentially refine the clinical risk stratification in AF.
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