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Yang Z, Chen S, Sun W, Yang Y, Xu Y, Tang Y, Jiang W, Li J, Zhang Y. Study on the mechanisms by which pumpkin polysaccharides regulate abnormal glucose and lipid metabolism in diabetic mice under oxidative stress. Int J Biol Macromol 2024; 270:132249. [PMID: 38729500 DOI: 10.1016/j.ijbiomac.2024.132249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 05/04/2024] [Accepted: 05/07/2024] [Indexed: 05/12/2024]
Abstract
Pumpkin polysaccharide (PPe-H) can perform physiological functions through its antioxidative and hypoglycemic effects; however, the mechanisms through which PPe-H regulates abnormal glucose and lipid metabolism caused by oxidative stress injury remain unclear. In the present study, streptozotocin was used to generate an acute diabetic mouse model, and the effects of PPe-H on glucose and lipid metabolism impaired by oxidative stress in diabetic mice were studied. PPe-H significantly reduced blood glucose levels and enhanced the oral glucose tolerance of diabetic mice under stress injury (p < 0.05). The analysis of liver antioxidant enzymes showed that PPe-H significantly enhanced the activities of SOD and CAT (p < 0.05), increased the GSH level, and decreased the level of MDA (p < 0.05). Transcriptomic and metabolomic analyses of the liver tissues of mice revealed characteristic differences in the genetic and metabolic levels of the samples, which showed that PPe-H treatment may play a positive role in regulating the metabolism of methionine, cysteine, glycerol phospholipid, and linoleic acid. These results indicated that PPe-H alleviated the symptoms of hyperglycemia by regulating metabolites related to oxidative stress and glycolipid metabolism in diabetic mice.
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Affiliation(s)
- Zeen Yang
- College of Life Sciences, Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, Zhejiang Province 310018, China
| | - Shengdong Chen
- College of Life Sciences, Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, Zhejiang Province 310018, China
| | - Wenxuan Sun
- Liang Xin College, China Jiliang University, Hangzhou, Zhejiang Province 310018, China
| | - Yechen Yang
- College of Life Sciences, Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, Zhejiang Province 310018, China
| | - Yuxuan Xu
- Liang Xin College, China Jiliang University, Hangzhou, Zhejiang Province 310018, China
| | - Yuxuan Tang
- College of Life Sciences, Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, Zhejiang Province 310018, China
| | - Wen Jiang
- College of Life Sciences, Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, Zhejiang Province 310018, China
| | - Jia Li
- College of Life Sciences, Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, Zhejiang Province 310018, China
| | - Yongjun Zhang
- College of Life Sciences, Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, Zhejiang Province 310018, China.
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Omar M, Alexiou M, Rekhi UR, Lehmann K, Bhardwaj A, Delyea C, Elahi S, Febbraio M. DNA methylation changes underlie the long-term association between periodontitis and atherosclerotic cardiovascular disease. Front Cardiovasc Med 2023; 10:1164499. [PMID: 37153468 PMCID: PMC10160482 DOI: 10.3389/fcvm.2023.1164499] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 03/22/2023] [Indexed: 05/09/2023] Open
Abstract
Periodontitis, the leading cause of adult tooth loss, has been identified as an independent risk factor for cardiovascular disease (CVD). Studies suggest that periodontitis, like other CVD risk factors, shows the persistence of increased CVD risk even after mitigation. We hypothesized that periodontitis induces epigenetic changes in hematopoietic stem cells in the bone marrow (BM), and such changes persist after the clinical elimination of the disease and underlie the increased CVD risk. We used a BM transplant approach to simulate the clinical elimination of periodontitis and the persistence of the hypothesized epigenetic reprogramming. Using the low-density lipoprotein receptor knockout (LDLRo ) atherosclerosis mouse model, BM donor mice were fed a high-fat diet to induce atherosclerosis and orally inoculated with Porphyromonas gingivalis (Pg), a keystone periodontal pathogen; the second group was sham-inoculated. Naïve LDLR o mice were irradiated and transplanted with BM from one of the two donor groups. Recipients of BM from Pg-inoculated donors developed significantly more atherosclerosis, accompanied by cytokine/chemokines that suggested BM progenitor cell mobilization and were associated with atherosclerosis and/or PD. Using whole-genome bisulfite sequencing, 375 differentially methylated regions (DMRs) and global hypomethylation in recipients of BM from Pg-inoculated donors were observed. Some DMRs pointed to the involvement of enzymes with major roles in DNA methylation and demethylation. In validation assays, we found a significant increase in the activity of ten-eleven translocase-2 and a decrease in the activity of DNA methyltransferases. Plasma S-adenosylhomocysteine levels were significantly higher, and the S-adenosylmethionine to S-adenosylhomocysteine ratio was decreased, both of which have been associated with CVD. These changes may be related to increased oxidative stress as a result of Pg infection. These data suggest a novel and paradigm-shifting mechanism in the long-term association between periodontitis and atherosclerotic CVD.
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Zhang M, Dong R, Da J, Yuan J, Zha Y, Long Y. Hyperhomocysteinemia exacerbates acute kidney injury via increased mitochondrial damage. Front Physiol 2022; 13:967104. [PMID: 36277207 PMCID: PMC9581205 DOI: 10.3389/fphys.2022.967104] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 09/20/2022] [Indexed: 11/13/2022] Open
Abstract
Acute kidney injury (AKI) is a complex and common set of multifactorial clinical syndromes, and associated with increased in-hospital mortality. There is increasing evidence that Hyperhomocysteinemia (HHcy) is highly associated with the development of a variety of kidney diseases, including AKI. However, the pathogenesis of HHcy in AKI remains unclear. In this study, we investigated the effect and mechanism of HHcy on cisplatin-induced AKI in mice and NRK-52E cells cultured with HHcy. We confirmed that mice with HHcy had higher serum levels of creatinine and more severe renal tubule injury after cisplatin injection. We found that HHcy aggravated renal mitochondrial damage, mainly manifested as decreased ATP β, significantly increased cytoplasmic Cyt C expression and the ADP/ATP ratio, and a significantly decreased mitochondrial DNA (mtDNA) copy number. In addition, we found that HHcy accelerated cisplatin-induced renal DNA damage; culturing NRK-52E cells with homocysteine (Hcy) could significantly increase apoptosis and mitochondrial damage. Interestingly, we found that Mdivi-1 reduced Hcy-induced mitochondrial damage, thereby reducing the level of apoptosis. In conclusion, these results suggest that HHcy might aggravate the development of AKI by increasing mitochondrial damage and that reducing Hcy levels or inhibiting mitochondrial damage may be a potential therapeutic strategy to delay the development of AKI.
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Affiliation(s)
- Mei Zhang
- Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People’s Hospital, Guiyang, China
| | - Rong Dong
- Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People’s Hospital, Guiyang, China
| | - Jingjing Da
- Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People’s Hospital, Guiyang, China
- Department of Biomedicine, Guizhou University School of Medicine, Guizhou University, Guiyang, China
| | - Jing Yuan
- Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People’s Hospital, Guiyang, China
- Department of Biomedicine, Guizhou University School of Medicine, Guizhou University, Guiyang, China
| | - Yan Zha
- Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People’s Hospital, Guiyang, China
- Department of Biomedicine, Guizhou University School of Medicine, Guizhou University, Guiyang, China
| | - Yanjun Long
- Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People’s Hospital, Guiyang, China
- Department of Biomedicine, Guizhou University School of Medicine, Guizhou University, Guiyang, China
- Department of Nephrology, People’s Hospital of Zhenfeng County, Qianxinan, Guizhou, China
- *Correspondence: Yanjun Long,
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Association of serum s-adenosylmethionine, s-adenosylhomocysteine, and their ratio with the risk of dementia and death in a community. Sci Rep 2022; 12:12427. [PMID: 35859106 PMCID: PMC9300687 DOI: 10.1038/s41598-022-16242-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 07/06/2022] [Indexed: 11/09/2022] Open
Abstract
We examined the association of serum s-adenosylmethionine (SAM), s-adenosylhomocysteine (SAH) (methionine metabolites), and their ratio on the risk of dementia and death in a community-dwelling population of older Japanese individuals. 1371 residents of Hisayama, Japan, aged 65 years or older and without dementia, were followed for a median of 10.2 years (2007–2017). We divided serum SAM, SAH, and SAM/SAH ratio into quartiles. Cox proportional hazards models were used to estimate the hazard ratios (HRs) and their 95% confidence intervals (CIs) of serum SAM, SAH, and SAM/SAH ratio levels on the risk of a composite outcome of all-cause dementia or death, and each outcome. During the follow-up, 635 participants developed all-cause dementia and/or died, of which 379 participants developed dementia and 394 deaths occurred. The multivariable-adjusted HRs of the composite outcome decreased significantly with increasing serum SAM levels (P for trend = 0.01), while they increased significantly with higher serum SAH levels (P for trend = 0.03). Higher serum SAM/SAH ratio levels were significantly associated with a lower risk of the composite outcome (P for trend = 0.002), as well as with lower risk of each outcome. Our findings suggest that the balance of methionine metabolites may closely associate with the risk of dementia and death.
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Dai X, Liu S, Cheng L, Huang T, Guo H, Wang D, Xia M, Ling W, Xiao Y. Betaine Supplementation Attenuates S-Adenosylhomocysteine Hydrolase-Deficiency-Accelerated Atherosclerosis in Apolipoprotein E-Deficient Mice. Nutrients 2022; 14:nu14030718. [PMID: 35277077 PMCID: PMC8840105 DOI: 10.3390/nu14030718] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/25/2022] [Accepted: 02/06/2022] [Indexed: 12/25/2022] Open
Abstract
S-adenosylhomocysteine (SAH) is a risk factor of cardiovascular diseases and atherosclerosis. However, the causal association between SAH and atherosclerosis is still uncertain. In the present study, heterozygous SAH hydrolase (SAHH+/−) knockout mice were bred with apolipoprotein E-deficient mice to produce ApoE−/−/SAHH+/− mice. At 8 weeks of age, these mice were fed on AIN-93G diets added with or without betaine (4 g betaine/100 g diet) for 8 weeks. Compared with ApoE−/−/SAHHWT mice, SAHH deficiency caused an accumulation of plasma SAH concentration and a decrease in S-adenosylmethionine (SAM)/SAH ratio as well as plasma homocysteine levels. Betaine supplementation lowered SAH levels and increased SAM/SAH ratio and homocysteine levels in ApoE−/−/SAHH+/− mice. Furthermore, SAHH deficiency promoted the development of atherosclerosis, which was reduced by betaine supplementation. The atheroprotective effects of betaine on SAHH-deficiency-promoted atherosclerosis were associated with inhibition of NFκB inflammation signaling pathway and inhibition of proliferation and migration of smooth muscle cells. In conclusion, our results suggest that betaine supplementation lowered plasma SAH levels and protected against SAHH-deficiency-promoted atherosclerosis through repressing inflammation and proliferation and migration of smooth muscle cells.
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Affiliation(s)
- Xin Dai
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China; (X.D.); (S.L.); (L.C.); (T.H.)
| | - Si Liu
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China; (X.D.); (S.L.); (L.C.); (T.H.)
| | - Lokyu Cheng
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China; (X.D.); (S.L.); (L.C.); (T.H.)
| | - Ting Huang
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China; (X.D.); (S.L.); (L.C.); (T.H.)
| | - Honghui Guo
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan 523808, China;
| | - Dongliang Wang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China; (D.W.); (M.X.); (W.L.)
| | - Min Xia
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China; (D.W.); (M.X.); (W.L.)
| | - Wenhua Ling
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China; (D.W.); (M.X.); (W.L.)
| | - Yunjun Xiao
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China; (X.D.); (S.L.); (L.C.); (T.H.)
- Correspondence: ; Tel.: +86-138-0989-0750
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Epigenetic regulation of TXNIP-mediated oxidative stress and NLRP3 inflammasome activation contributes to SAHH inhibition-aggravated diabetic nephropathy. Redox Biol 2021; 45:102033. [PMID: 34119876 PMCID: PMC8209273 DOI: 10.1016/j.redox.2021.102033] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/30/2021] [Accepted: 06/02/2021] [Indexed: 12/22/2022] Open
Abstract
S-adenosylhomocysteine (SAH) is hydrolyzed by SAH hydrolase (SAHH) to homocysteine and adenosine. Increased plasma SAH levels were associated with disturbed renal function in patients with diabetes. However, the role and mechanism of SAHH in diabetic nephropathy is still unknown. In the present study, we found that inhibition of SAHH by using its inhibitor adenosine dialdehyde (ADA) accumulates intracellular or plasma SAH levels and increases high glucose-induced podocyte injury and aggravates STZ-induced diabetic nephropathy, which is associated with Nod-like receptor protein 3 (NLRP3) inflammasome activation. Inhibition or knockout of NLRP3 attenuates SAHH inhibition-aggravated podocyte injury and diabetic nephropathy. Additionally, SAHH inhibition increases thioredoxin-interacting protein (TXNIP)-mediated oxidative stress and NLRP3 inflammasome activation, but these effects were not observed in TXNIP knockout mice. Mechanistically, SAHH inhibition increased TXNIP by inhibiting histone methyltransferase enhancer of zeste homolog 2 (EZH2) and reduced trimethylation of histone H3 lysine 27 and its enrichment at promoter of early growth response 1 (EGR1). Moreover, EGR1 is activated and enriched at promoters of TXNIP by SAHH inhibition and is essential for SAHH inhibition-induced TXNIP expression. Inhibition of EGR1 protected against SAHH inhibition-induced NLRP3 inflammasome activation and oxidative stress and diabetic nephropathy. Finally, the harmful effects of SAHH inhibition on inflammation and oxidative stress and diabetic nephropathy were also observed in heterozygote SAHH knockout mice. These findings suggest that EZH2/EGR1/TXNIP/NLRP3 signaling cascade contributes to SAHH inhibition-aggravated diabetic nephropathy. Our study firstly provides a novel insight into the role and mechanism of SAHH inhibition in diabetic nephropathy. SAHH inhibition accumulates SAH levels and aggravates podocyte injury and diabetic nephropathy. SAHH inhibition induces TXNIP-mediated oxidative stress and NLRP3 inflammasome activation. SAHH inhibition increases TXNIP by inhibiting EZH2 and reducing H3K27me3 and its enrichment at promoter of EGR1. EGR1 is required for SAHH inhibition-induced TXNIP and NLRP3 inflammasome activation and diabetic nephropathy.
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Gupta A, Storey KB. Coordinated expression of Jumonji and AHCY under OCT transcription factor control to regulate gene methylation in wood frogs during anoxia. Gene 2021; 788:145671. [PMID: 33887369 DOI: 10.1016/j.gene.2021.145671] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 04/05/2021] [Accepted: 04/15/2021] [Indexed: 12/17/2022]
Abstract
Wood frogs (Rana sylvatica) can survive extended periods of whole body freezing. Freezing imparts multiple stresses on cells that include anoxia and dehydration, but these can also be experienced as independent stresses. Under anoxia stress, energy metabolism is suppressed, and pro-survival pathways are prioritized to differentially regulate some transcription factors including OCT1 and OCT4. Jumonji C domain proteins (JMJD1A and JMJD2C) are hypoxia responsive demethylases whose expression is accelerated by OCT1 and OCT4 which act to demethylate genes related to the methionine cycle. The responses by these factors to 24 h anoxia exposure and 4 h aerobic recovery was analyzed in liver and skeletal muscle of wood frogs to assess their involvement in metabolic adaptation to oxygen limitation. Immunoblot results showed a decrease in JMJD1A levels under anoxia in liver and muscle, but an increase was observed in JMJD2C demethylase protein in anoxic skeletal muscle. Protein levels of adenosylhomocysteinase (AHCY) and methionine adenosyl transferase (MAT), enzymes of the methionine cycle, also showed an increase in the reoxygenated liver, whereas the levels decreased in muscle. A transcription factor ELISA showed a decrease in DNA binding by OCT1 in the reoxygenated liver and anoxic skeletal muscle, and transcript levels also showed tissue specific gene expression. The present study provides the first analysis of the role of the OCT1 transcription factor, associated proteins, and lysine demethylases in mediating responses to anoxia by wood frog tissues.
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Affiliation(s)
- Aakriti Gupta
- Department of Biology, Carleton University, Ottawa K1S 5B6, Canada
| | - Kenneth B Storey
- Department of Biology, Carleton University, Ottawa K1S 5B6, Canada.
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Comparison of the efficacy of multiple antioxidant and hyperbaric oxygen treatments in the prevention of ischemia and necrosis of local random McFarlane skin flap. J Tissue Viability 2021; 30:196-206. [PMID: 33736935 DOI: 10.1016/j.jtv.2021.02.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 01/26/2021] [Accepted: 02/19/2021] [Indexed: 11/20/2022]
Abstract
OBJECTIVE The aim of this study was to compare the efficacy of multiple antioxidant (Proxeed Plus (PP) with Carnitine, Selenium, Zinc, Coenzyme Q10, Vitamin C, Folic Acid, Vitamin B12) on local random skin flap healing with the hyperbaric oxygen (HBO) therapy. METHODS Fourty rats were equally divided into five groups (Control, PP, HBO, HBO + PP, PP + HBO + PP). Local random McFarlane skin flap was applied to all rats. Following the applications, evaluations were made biochemical (TAS, TOS, OSI, IL-1β, IL-6, TNF-α, TGF-β, VEGF) and histopathological parameters. RESULTS Necrosis percentage was found to be lower in the PP + HBO + PP group than all other groups whereas the necrosis percentages of PP and HBO groups were similar. Oxidative stress rates were significantly higher in the control group compared to the other groups whereas it was lower in the PP + HBO + PP group than all other groups. The inflammation parameters were the highest in the control group and the lowest in the PP + HBO + PP group. Growth factors were higher in the PP + HBO + PP group than all other groups. Epithelialization and wound healing were better in the HBO and PP groups than in the control group. The greatest healing, epithelialization and vascularization was seen in the PP + HBO + PP group. The histopathological findings in the PP + HBO + PP group were better in each inner region than in the other groups. CONCLUSION Biochemical and histopathological parameters have shown that PP reduces ischemia and necrosis and increases oxygenation in flap healing by providing significant improvement thanks to the multiple molecular structures in its content.
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Stojan G, Li J, Liu T, Kane MA, Petri MA. Intracellular homocysteine metabolites in SLE: plasma S-adenosylhomocysteine correlates with coronary plaque burden. Lupus Sci Med 2021; 8:8/1/e000453. [PMID: 33479047 PMCID: PMC7825256 DOI: 10.1136/lupus-2020-000453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/09/2020] [Accepted: 01/10/2021] [Indexed: 11/17/2022]
Abstract
Background and aims We hypothesised that intracellular homocysteine and homocysteine metabolite levels in patients with SLE are disproportionately elevated compared with the levels seen in healthy subjects and that they are independently associated with coronary plaque in SLE. Methods A liquid chromatography–tandem mass spectrometry absolute quantification assay was used for the determination of six analytes in both plasma and peripheral blood mononuclear cells (PBMCs): homocysteine (Hcy), S-adenosylmethionine (SAM), S-adenosylhomocysteine (SAH), methionine (Met), cystathionine (Cysta) and 5-methyltetrahydrofolate (5m-THF). We then compared intracellular (PBMC) and extracellular (plasma) Hcy and Hcy metabolite (SAM, SAH, Met, Cysta and 5m-THF) concentrations in 10 patients with SLE and in 10 age, sex and ethnicity matched controls. Subjects with a history of diabetes mellitus, cardiovascular disease, hypertension, alcohol consumption in excess of 3 units per day, anaemia, renal insufficiency (serum creatinine >1.5 mg/dL) and pregnancy were excluded. All patients with SLE had two coronary CT angiography studies as screening for occult coronary atherosclerotic disease. Results Plasma from patients with SLE had higher levels of Hcy (p<0.0001), SAH (p<0.05), SAM (p<0.001) and lower levels of Met (p<0.05) and Cysta (p<0.001) compared with controls. PBMC intracellular concentrations from patients with SLE had higher levels of Cysta (p<0.05), SAH (p<0.05), SAM (p<0.001) and lower levels of 5m-THF (p<0.001). Plasma SAH showed a positive correlation with total coronary plaque, calcified plaque and non-calcified plaque (p<0.05). Conclusion Intracellular concentrations of Hcy metabolites were significantly different between patients with SLE and controls, despite similar intracellular Hcy levels. Plasma SAH was positively correlated with total coronary plaque, calcified plaque and non-calcified plaque.
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Affiliation(s)
- George Stojan
- Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jessica Li
- Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Tian Liu
- University of Maryland School of Pharmacy, Baltimore, Maryland, USA
| | - Maureen A Kane
- University of Maryland School of Pharmacy, Baltimore, Maryland, USA
| | - Michelle A Petri
- Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Singh P, Charles S, Madhavan T, Munusamy-Ramanujam G, Saraswathi NT, Arasu MV, Al-Dhabi NA, Arshad A, Arockiaraj J, Mala K. Pharmacologic downregulation of protein arginine methyltransferase1 expression by adenosine dialdehyde increases cell senescence in breast cancer. Eur J Pharmacol 2020; 891:173697. [PMID: 33144068 DOI: 10.1016/j.ejphar.2020.173697] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/19/2020] [Accepted: 10/27/2020] [Indexed: 11/30/2022]
Abstract
We investigated the role of protein arginine methylation (PAM) in estrogen receptor (ER)-positive breast cancer cells through pharmacological intervention. Tamoxifen (TAM) or adenosine dialdehyde (ADOX), independently, triggered cell cycle arrest and down-regulated PAM, as reduced protein arginine methyltransferase1 (PRMT1) mRNA and asymmetric dimethylarginine (ADMA) levels. Synergistic effect of these compounds elicited potent anti-cancer effect. However, reduction in ADMA was not proportionate with the compound-induced down-regulation of PRMT1 mRNA. We hypothesized that the disproportionate effect is due to the influence of the compounds on other methyltransferases, which catalyze the arginine dimethylation reaction and the diversity in the degree of drug-protein interaction among these methyltransferases. In silico analyses revealed that independently, ADOX or TAM, binds with phosphatidylethanolamine-methyltransferase (PEMT) or betaine homocysteine-methyl transferase (BHMT); and that the binding affinity of ADOX with PEMT or BHMT is prominent than TAM. These observations suggest that in breast cancer, synergistic effect of ADOX + TAM elicits impressive protective function by regulating PAM; and plausibly, restoration of normal enzyme activities of methyltransferases catalyzing arginine dimethylation could have clinical benefits.
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Affiliation(s)
- Priya Singh
- Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, Tamil Nadu, India
| | - Soniya Charles
- Department of Medical Research, Medical College Hospital and Research Center, SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, Tamil Nadu, India; Department of Biotechnology, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, Tamil Nadu, India
| | - Thirumurthy Madhavan
- Computational Biology Laboratory, Department of Genetic Engineering, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, Tamil Nadu, India
| | - Ganesh Munusamy-Ramanujam
- Interdisciplinary Institute of Indian System of Medicine, College of Engineering and Technology,SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, Tamil Nadu, India
| | - N T Saraswathi
- Molecular Biophysics Lab, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, 613 401, Tamil Nadu, India
| | - Mariadhas Valan Arasu
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Naif Abdullah Al-Dhabi
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Aziz Arshad
- International Institute of Aquaculture and Aquatic Sciences (I-AQUAS), Universiti Putra Malaysia, 71050, Port Dickson, Negeri Sembilan, Malaysia; Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Jesu Arockiaraj
- SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, Tamil Nadu, India.
| | - Kanchana Mala
- Department of Medical Research, Medical College Hospital and Research Center, SRM Institute of Science and Technology, Kattankulathur, 603 203, Chennai, Tamil Nadu, India.
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Xiao Y, Xia J, Cheng J, Huang H, Zhou Y, Yang X, Su X, Ke Y, Ling W. Inhibition of S-Adenosylhomocysteine Hydrolase Induces Endothelial Dysfunction via Epigenetic Regulation of p66shc-Mediated Oxidative Stress Pathway. Circulation 2020; 139:2260-2277. [PMID: 30773021 DOI: 10.1161/circulationaha.118.036336] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Elevated levels of S-adenosylhomocysteine (SAH), the precursor of homocysteine, are positively associated with the risk of cardiovascular disease and with the development and progression of atherosclerosis. However, the role of SAH in endothelial dysfunction is unclear. METHODS Apolipoprotein E-deficient ( apoE-/-) mice received dietary supplementation with the SAH hydrolase (SAHH) inhibitor adenosine dialdehyde or were intravenously injected with a retrovirus expressing SAHH shRNA. These 2 approaches, along with the heterozygous SAHH gene knockout ( SAHH+/-) mouse model, were used to elevate plasma SAH levels and to examine the role of SAH in aortic endothelial dysfunction. The relationship between plasma SAH levels and endothelial dysfunction was also investigated in human patients with coronary artery disease and healthy control subjects. RESULTS Plasma SAH levels were increased in SAHH+/- mice and in apoE-/- mice after dietary administration of adenosine dialdehyde or intravenous injection with SAHH shRNA. SAHH+/- mice or apoE-/- mice with SAHH inhibition showed impaired endothelium-dependent vascular relaxation and decreased nitric oxide bioavailability after treatment with acetylcholine; this was completely abolished by the administration of the endothelial nitric oxide synthase inhibitor NG-nitro-l-arginine methyl ester. Furthermore, SAHH inhibition induced production of reactive oxygen species and p66shc expression in the mouse aorta and human aortic endothelial cells. Antioxidants and p66shc siRNA prevented SAHH inhibition-induced generation of reactive oxygen species and attenuated the impaired endothelial vasomotor responses in high-SAH mice. Moreover, inhibition of SAHH induced hypomethylation in the p66shc gene promoter and inhibited expression of DNA methyltransferase 1. Overexpression of DNA methyltransferase 1, induced by transduction of an adenovirus, was sufficient to abrogate SAHH inhibition-induced upregulation of p66shc expression. Finally, plasma SAH levels were inversely associated with flow-mediated dilation and hypomethylation of the p66shc gene promoter and positively associated with oxidative stress levels in patients with coronary artery disease and healthy control subjects. CONCLUSIONS Our findings indicate that inhibition of SAHH results in elevated plasma SAH levels and induces endothelial dysfunction via epigenetic upregulation of the p66shc-mediated oxidative stress pathway. Our study provides novel molecular insight into mechanisms of SAH-associated endothelial injury that may contribute to the development of atherosclerosis. CLINICAL TRIAL REGISTRATION URL: https://www.clinicaltrials.gov . Unique identifier: NCT03345927.
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Affiliation(s)
- Yunjun Xiao
- Shenzhen Key Laboratory of Molecular Epidemiology (Y.X., J.X., J.C., Y.Z., YK.), Shenzhen Center for Disease Control and Prevention, Guangdong, China
| | - Junjie Xia
- Shenzhen Key Laboratory of Molecular Epidemiology (Y.X., J.X., J.C., Y.Z., YK.), Shenzhen Center for Disease Control and Prevention, Guangdong, China
| | - Jinquan Cheng
- Shenzhen Key Laboratory of Molecular Epidemiology (Y.X., J.X., J.C., Y.Z., YK.), Shenzhen Center for Disease Control and Prevention, Guangdong, China
| | - Haiyan Huang
- Key Laboratory of Modern Toxicology of Shenzhen (H.H., X.Y.), Shenzhen Center for Disease Control and Prevention, Guangdong, China
| | - Yani Zhou
- Shenzhen Key Laboratory of Molecular Epidemiology (Y.X., J.X., J.C., Y.Z., YK.), Shenzhen Center for Disease Control and Prevention, Guangdong, China
| | - Xifei Yang
- Key Laboratory of Modern Toxicology of Shenzhen (H.H., X.Y.), Shenzhen Center for Disease Control and Prevention, Guangdong, China
| | - Xuefen Su
- School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, China (X.S.)
| | - Yuebin Ke
- Shenzhen Key Laboratory of Molecular Epidemiology (Y.X., J.X., J.C., Y.Z., YK.), Shenzhen Center for Disease Control and Prevention, Guangdong, China
| | - Wenhua Ling
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, China (W.L.)
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12
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Ivanov AV, Kruglova MP, Virus ED, Bulgakova PO, Vital'evich Grachev S, Kubatiev AA. Determination of S-adenosylmethionine, S-adenosylhomocysteine, and methylthioadenosine in urine using solvent-modified micellar electrokinetic chromatography. Electrophoresis 2019; 41:209-214. [PMID: 31779046 DOI: 10.1002/elps.201900364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/22/2019] [Accepted: 11/25/2019] [Indexed: 01/03/2023]
Abstract
A new approach for direct determination of S-adenosylmethionine (SAM), S-adenosylhomocysteine (SAH), and methylthioadenosine (MTA) in urine was developed based on MEKC by using SDS modified with isobutanol in the presence of PEG-300. Analytes were first extracted with grafted phenylborononic acid. Using a 50 µm internal diameter silica capillary of 32 cm total length filled with 0.05 M SDS, 0.05 M H3 PO4 , 5% (v/v) isobutanol, and 10% (v/v) PEG-300, LOQ of 0.15 µM for SAM and SAH, and 0.2 µM for MTA was reached. Accuracy was 92% for MTA, 109% for SAH, and 105% for SAM, intra- and interday imprecision were <2.5 and ≤3%, respectively. The total time of analysis for one sample was 10 min. Analysis of 30 urine samples from healthy volunteers showed that the median SAM and SAH levels were 12.1 and 0.73 µM, respectively. MTA levels, which were determined in urine for the first time (according to our data), were 0.43 µM, and these values correlated well with the SAM level (r = 0.748, p < 0.01).
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Affiliation(s)
- Alexander Vladimirovich Ivanov
- Department of Molecular and Cell Pathophysiology, Federal State Budgetary Scientific Institution "Institute of General Pathology and Pathophysiology", Moscow, Russia
| | | | - Edward Danielevich Virus
- Department of Molecular and Cell Pathophysiology, Federal State Budgetary Scientific Institution "Institute of General Pathology and Pathophysiology", Moscow, Russia
| | - Polina Olegovna Bulgakova
- Department of Molecular and Cell Pathophysiology, Federal State Budgetary Scientific Institution "Institute of General Pathology and Pathophysiology", Moscow, Russia
| | | | - Aslan Amirkhanovich Kubatiev
- Department of Molecular and Cell Pathophysiology, Federal State Budgetary Scientific Institution "Institute of General Pathology and Pathophysiology", Moscow, Russia.,Russian Medical Academy of Continuous Professional Education, Moscow, Russia
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13
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Pulmonary Endothelial Cell Apoptosis in Emphysema and Acute Lung Injury. ADVANCES IN ANATOMY EMBRYOLOGY AND CELL BIOLOGY 2019; 228:63-86. [PMID: 29288386 DOI: 10.1007/978-3-319-68483-3_4] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Apoptosis plays an essential role in homeostasis and pathogenesis of a variety of human diseases. Endothelial cells are exposed to various environmental and internal stress and endothelial apoptosis is a pathophysiological consequence of these stimuli. Pulmonary endothelial cell apoptosis initiates or contributes to progression of a number of lung diseases. This chapter will focus on the current understanding of the role of pulmonary endothelial cell apoptosis in the development of emphysema and acute lung injury (ALI) and the factors controlling pulmonary endothelial life and death.
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14
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Korkmaz HI, Hahn NE, Jansen KM, Musters R, van Bezu J, van Wieringen WN, van Zuijlen P, Ulrich M, Niessen H, Krijnen P. Homocysteine-induced inverse expression of tissue factor and DPP4 in endothelial cells is related to NADPH oxidase activity. Physiol Int 2019; 106:29-38. [PMID: 30888218 DOI: 10.1556/2060.106.2019.05] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE We previously found that homocysteine (Hcy)-induced apoptosis in endothelial cells coincided with increased NADPH oxidase (NOX) activity. In addition, in ischemic endothelial cells present in the heart, we showed that loss of serine protease dipeptidyl peptidase IV (DPP4) expression was correlated with induction of tissue factor (TF) expression. Since Hcy can initiate thrombosis through the induction of TF expression, in this study, we evaluated whether the inverse relation of TF and DPP4 is also Hcy-dependent and whether NOX-mediated reactive oxygen species (ROS) is playing a role herein. METHODS Human umbilical vein endothelial cells (HUVECs) were incubated with 2.5 mM Hcy for 3 and 6 h. The effects of Hcy on DPP4 and TF expression and NOX2/p47phox-mediated nitrotyrosine (ROS) production were studied using digital-imaging microscopy. RESULTS In HUVECs, high levels of Hcy showed a significant increase of TF expression and a concomitant loss of DPP4 expression after 6 h. In addition, NOX subunits NOX2 and p47phox were also significantly increased after 6 h of Hcy incubation and coincided with nitrotyrosine (ROS) expression. Interestingly, inhibition of NOX-mediated nitrotyrosine (ROS) with the use of apocynin not only reduced these effects, but also counteracted the effects of Hcy on TF and DPP4 expression. CONCLUSION These results indicate that the inverse relation of TF and DPP4 in endothelial cells is also Hcy-dependent and related to NOX activity.
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Affiliation(s)
- H I Korkmaz
- 1 Department of Pathology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands.,2 Amsterdam Cardiovascular Sciences (ACS), Amsterdam UMC, VUmc , Amsterdam, The Netherlands
| | - N E Hahn
- 1 Department of Pathology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands.,2 Amsterdam Cardiovascular Sciences (ACS), Amsterdam UMC, VUmc , Amsterdam, The Netherlands
| | - K M Jansen
- 1 Department of Pathology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands
| | - Rjp Musters
- 3 Department of Physiology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands
| | - J van Bezu
- 3 Department of Physiology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands
| | - W N van Wieringen
- 4 Department of Epidemiology and Biostatistics, Amsterdam UMC, VUmc , Amsterdam, The Netherlands.,5 Department of Mathematics, Amsterdam UMC, VUmc , Amsterdam, The Netherlands
| | - Ppm van Zuijlen
- 6 Department of Plastic, Reconstructive and Hand Surgery, MOVE Research Institute, Amsterdam UMC, VUmc , Amsterdam, The Netherlands.,7 Department of Plastic and Reconstructive Surgery, Burn Center, Red Cross Hospital , Beverwijk, The Netherlands.,8 Preclinical Research, Association of Dutch Burn Centres (ADBC) , Beverwijk, The Netherlands
| | - Mmw Ulrich
- 1 Department of Pathology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands.,8 Preclinical Research, Association of Dutch Burn Centres (ADBC) , Beverwijk, The Netherlands.,9 Department of Molecular Cell Biology and Immunology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands
| | - Hwm Niessen
- 1 Department of Pathology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands.,2 Amsterdam Cardiovascular Sciences (ACS), Amsterdam UMC, VUmc , Amsterdam, The Netherlands.,10 Department of Cardiac Surgery, Amsterdam UMC, VUmc , Amsterdam, The Netherlands
| | - Paj Krijnen
- 1 Department of Pathology, Amsterdam UMC, VUmc , Amsterdam, The Netherlands.,2 Amsterdam Cardiovascular Sciences (ACS), Amsterdam UMC, VUmc , Amsterdam, The Netherlands
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15
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Mafra D, Esgalhado M, Borges NA, Cardozo LFMF, Stockler-Pinto MB, Craven H, Buchanan SJ, Lindholm B, Stenvinkel P, Shiels PG. Methyl Donor Nutrients in Chronic Kidney Disease: Impact on the Epigenetic Landscape. J Nutr 2019; 149:372-380. [PMID: 30796783 DOI: 10.1093/jn/nxy289] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/23/2018] [Accepted: 10/26/2018] [Indexed: 12/28/2022] Open
Abstract
Epigenetic alterations, such as those linked to DNA methylation, may potentially provide molecular explanations for complications associated with altered gene expression in illnesses, such as chronic kidney disease (CKD). Although both DNA hypo- and hypermethylation have been observed in the uremic milieu, this remains only a single aspect of the epigenetic landscape and, thus, of any biochemical dysregulation associated with CKD. Nevertheless, the role of uremia-promoting alterations on the epigenetic landscape regulating gene expression is still a novel and scarcely studied field. Although few studies have actually reported alterations of DNA methylation via methyl donor nutrient intake, emerging evidence indicates that nutritional modification of the microbiome can affect one-carbon metabolism and the capacity to methylate the genome in CKD. In this review, we discuss the nutritional modifications that may affect one-carbon metabolism and the possible impact of methyl donor nutrients on the microbiome, CKD, and its phenotype.
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Affiliation(s)
- Denise Mafra
- Post Graduation Program in Medical Sciences.,Post Graduation Program in Cardiovascular Sciences
| | | | - Natalia A Borges
- Post Graduation Program in Cardiovascular Sciences.,Post Graduation Program in Nutrition Sciences, Federal Fluminense University (UFF), Niterói-Rio de Janeiro (RJ), Brazil
| | | | - Milena B Stockler-Pinto
- Post Graduation Program in Cardiovascular Sciences.,Post Graduation Program in Nutrition Sciences, Federal Fluminense University (UFF), Niterói-Rio de Janeiro (RJ), Brazil
| | - Hannah Craven
- Wolfson Wohl Translational Research Centre, Institute of Cancer Sciences, University of Glasgow, Bearsden, Glasgow, UK
| | - Sarah J Buchanan
- Wolfson Wohl Translational Research Centre, Institute of Cancer Sciences, University of Glasgow, Bearsden, Glasgow, UK
| | - Bengt Lindholm
- Division of Renal Medicine and Baxter Novum, Department of Clinical Science, Technology and Intervention, Karolinska Institutet, Stockholm, Sweden
| | - Peter Stenvinkel
- Division of Renal Medicine and Baxter Novum, Department of Clinical Science, Technology and Intervention, Karolinska Institutet, Stockholm, Sweden
| | - Paul G Shiels
- Wolfson Wohl Translational Research Centre, Institute of Cancer Sciences, University of Glasgow, Bearsden, Glasgow, UK
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16
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Liu X, Qin Z, Liu C, Song M, Luo X, Zhao H, Qian D, Chen J, Huang L. Nox4 and soluble epoxide hydrolase synergistically mediate homocysteine-induced inflammation in vascular smooth muscle cells. Vascul Pharmacol 2019; 120:106544. [PMID: 30610956 DOI: 10.1016/j.vph.2019.01.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/05/2018] [Accepted: 01/01/2019] [Indexed: 01/03/2023]
Abstract
BACKGROUND Hyperhomocysteinemia leads to a vascular smooth muscle cell (VSMC) inflammatory response. Meanwhile, Nox4 dependent reactive oxygen species (ROS) signaling and soluble epoxide hydrolase (sEH)/epoxyeicosatrienoic acids (EETs) are both involved in vascular inflammation. Herein, we hypothesized that Nox4 and soluble epoxide hydrolase cross regulated during homocysteine-induced VSMC inflammation. METHODS AND RESULTS In cultured VSMCs, the expression of the inflammatory factors VCAM1 and ICAM1 was measured by real-time PCR and Western blotting, while supernatant MCP1 was measured by ELISA. Upon VSMC stimulation with 50 μΜ homocysteine, we observed the VCAM1 and ICAM1 mRNA levels were increased by 1.15 and 1.0 folds, respectively. The MCP1 levels in the supernatant of cultured VSMCs treated with 100 μΜ increased to 1.76 folds. As expected, homocysteine induced Nox4 expression and Nox4-dependent ROS generation. The sEH expression was also upregulated in the presence of homocysteine in a dose-dependent manner. Furthermore, we knocked down Nox4 with siRNA. Knockdown of Nox4 decreased ROS generation and homocysteine-induced sEH expression. Overexpression of Nox4 with an adenovirus stimulated sEH expression. Similarly, knockdown or chemical inhibition of sEH blunted the upregulation of Nox4 by homocysteine. In vivo, in homocysteine-fed mice, concomitant upregulation of Nox4 and sEH was associated with increased VCAM1 and ICAM1 expression in the aortic wall. CONCLUSIONS The inflammatory response induced by homocysteine in VSMCs was accompanied by Nox4 and sEH upregulation. Nox4 and soluble epoxide hydrolase synergistically contribute to homocysteine-induced inflammation.
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Affiliation(s)
- Xi Liu
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China
| | - Zhexue Qin
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China
| | - Chuan Liu
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China
| | - Mingbao Song
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China
| | - Xiaolin Luo
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China
| | - Hongqing Zhao
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China
| | - Dehui Qian
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China
| | - Jianfei Chen
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China
| | - Lan Huang
- Department of Cardiology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, China.
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17
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Ostrakhovitch EA, Tabibzadeh S. Homocysteine and age-associated disorders. Ageing Res Rev 2019; 49:144-164. [PMID: 30391754 DOI: 10.1016/j.arr.2018.10.010] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 09/30/2018] [Accepted: 10/25/2018] [Indexed: 12/26/2022]
Abstract
There are numerous theories of aging, a process which still seems inevitable. Aging leads to cancer and multi-systemic disorders as well as chronic diseases. Decline in age- associated cellular functions leads to neurodegeneration and cognitive decline that affect the quality of life. Accumulation of damage, mutations, metabolic changes, failure in cellular energy production and clearance of altered proteins over the lifetime, and hyperhomocysteinemia, ultimately result in tissue degeneration. The decline in renal functions, nutritional deficiencies, deregulation of methionine cycle and deficiencies of homocysteine remethylation and transsulfuration cofactors cause elevation of homocysteine with advancing age. Abnormal accumulation of homocysteine is a risk factor of cardiovascular, neurodegenerative and chronic kidney disease. Moreover, approximately 50% of people, aged 65 years and older develop hypertension and are at a high risk of developing cardiovascular insufficiency and incurable neurodegenerative disorders. Increasing evidence suggests inverse relation between cognitive impairment, cerebrovascular and cardiovascular events and renal function. Oxidative stress, inactivation of nitric oxide synthase pathway and mitochondria dysfunction associated with impaired homocysteine metabolism lead to aging tissue degeneration. In this review, we examine impact of high homocysteine levels on changes observed with aging that contribute to development and progression of age associated diseases.
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Affiliation(s)
- E A Ostrakhovitch
- Frontiers in Bioscience Research Institute in Aging and Cancer, Irvine, CA, USA.
| | - S Tabibzadeh
- Frontiers in Bioscience Research Institute in Aging and Cancer, Irvine, CA, USA.
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18
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p47phox-Dependent Reactive Oxygen Species Stimulate Nuclear Translocation of the FoxO1 Transcription Factor During Metabolic Inhibition in Cardiomyoblasts. Cell Biochem Biophys 2018; 76:401-410. [PMID: 29956081 PMCID: PMC6097050 DOI: 10.1007/s12013-018-0847-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 06/11/2018] [Indexed: 01/06/2023]
Abstract
Reactive oxygen species (ROS) control forkhead box O (FOXO) transcription factor activity by influencing their nuclear translocation. However, knowledge of the ROS cellular source(s) involved herein remains scarce. Recently, we have shown p47phox-dependent activation of ROS-producing NADPH oxidase (NOX) at the nuclear pore in H9c2 rat cardiomyoblasts in response to ischemia. This localizes NOX perfectly to affect protein nuclear translocation, including that of transcription factors. In the current study, involvement of p47phox-dependent production of ROS in the nuclear translocation of FOXO1 was analyzed in H9c2 cells following 4 h of metabolic inhibition (MI), which mimics the effects of ischemia. Nuclear translocation of FOXO1 was determined by quantitative digital-imaging fluorescence and western blot analysis. Subsequently, the effect of inhibiting p47phox-dependent ROS production by short hairpin RNA (shRNA) transfection on FOXO1 translocation was analyzed by digital-imaging microscopy. MI induced a significant translocation of FOXO1 into the nucleus. Transfection with p47phox-shRNA successfully knocked-down p47phox expression, reduced nuclear nitrotyrosine production, an indirect marker for ROS production, and inhibited the nuclear translocation of FOXO1 following MI. With these results, we show for the first time that nuclear import of FOXO1 induced by MI in H9c2 depends critically on p47phox-mediated ROS production.
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19
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Bito T, Misaki T, Yabuta Y, Ishikawa T, Kawano T, Watanabe F. Vitamin B 12 deficiency results in severe oxidative stress, leading to memory retention impairment in Caenorhabditis elegans. Redox Biol 2016; 11:21-29. [PMID: 27840283 PMCID: PMC5107735 DOI: 10.1016/j.redox.2016.10.013] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/21/2016] [Accepted: 10/21/2016] [Indexed: 11/06/2022] Open
Abstract
Oxidative stress is implicated in various human diseases and conditions, such as a neurodegeneration, which is the major symptom of vitamin B12 deficiency, although the underlying disease mechanisms associated with vitamin B12 deficiency are poorly understood. Vitamin B12 deficiency was found to significantly increase cellular H2O2 and NO content in Caenorhabditis elegans and significantly decrease low molecular antioxidant [reduced glutathione (GSH) and L-ascorbic acid] levels and antioxidant enzyme (superoxide dismutase and catalase) activities, indicating that vitamin B12 deficiency induces severe oxidative stress leading to oxidative damage of various cellular components in worms. An NaCl chemotaxis associative learning assay indicated that vitamin B12 deficiency did not affect learning ability but impaired memory retention ability, which decreased to approximately 58% of the control value. When worms were treated with 1 mmol/L GSH, L-ascorbic acid, or vitamin E for three generations during vitamin B12 deficiency, cellular malondialdehyde content as an index of oxidative stress decreased to the control level, but the impairment of memory retention ability was not completely reversed (up to approximately 50%). These results suggest that memory retention impairment formed during vitamin B12 deficiency is partially attributable to oxidative stress.
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Affiliation(s)
- Tomohiro Bito
- The School of Agricultural, Biological and Environmental sciences, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan
| | - Taihei Misaki
- The School of Agricultural, Biological and Environmental sciences, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan
| | - Yukinori Yabuta
- The School of Agricultural, Biological and Environmental sciences, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan
| | - Takahiro Ishikawa
- Department of Life Science and Biotechnology, Faculty of Life and Environmental Science, Shimane University, Shimane 690-8504, Japan
| | - Tsuyoshi Kawano
- The School of Agricultural, Biological and Environmental sciences, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan
| | - Fumio Watanabe
- The School of Agricultural, Biological and Environmental sciences, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
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20
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Zawada AM, Schneider JS, Michel AI, Rogacev KS, Hummel B, Krezdorn N, Müller S, Rotter B, Winter P, Obeid R, Geisel J, Fliser D, Heine GH. DNA methylation profiling reveals differences in the 3 human monocyte subsets and identifies uremia to induce DNA methylation changes during differentiation. Epigenetics 2016; 11:259-72. [PMID: 27018948 DOI: 10.1080/15592294.2016.1158363] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Human monocytes are a heterogeneous cell population consisting of 3 subsets: classical CD14++CD16-, intermediate CD14++CD16+ and nonclassical CD14+CD16++ monocytes. Via poorly characterized mechanisms, intermediate monocyte counts rise in chronic inflammatory diseases, among which chronic kidney disease is of particular epidemiologic importance. DNA methylation is a central epigenetic feature that controls hematopoiesis. By applying next-generation Methyl-Sequencing we now tested how far the 3 monocyte subsets differ in their DNA methylome and whether uremia induces DNA methylation changes in differentiating monocytes. We found that each monocyte subset displays a unique phenotype with regards to DNA methylation. Genes with differentially methylated promoter regions in intermediate monocytes were linked to distinct immunological processes, which is in line with results from recent gene expression analyses. In vitro, uremia induced dysregulation of DNA methylation in differentiating monocytes, which affected several transcription regulators important for monocyte differentiation (e.g., FLT3, HDAC1, MNT) and led to enhanced generation of intermediate monocytes. As potential mediator, the uremic toxin and methylation inhibitor S-adenosylhomocysteine induced shifts in monocyte subsets in vitro, and associated with monocyte subset counts in vivo. Our data support the concept of monocyte trichotomy and the distinct role of intermediate monocytes in human immunity. The shift in monocyte subsets that occurs in chronic kidney disease, a proinflammatory condition of substantial epidemiological impact, may be induced by accumulation of uremic toxins that mediate epigenetic dysregulation.
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Affiliation(s)
- Adam M Zawada
- a Department of Internal Medicine IV , Saarland University Medical Center , Homburg , Germany
| | - Jenny S Schneider
- a Department of Internal Medicine IV , Saarland University Medical Center , Homburg , Germany
| | - Anne I Michel
- a Department of Internal Medicine IV , Saarland University Medical Center , Homburg , Germany
| | - Kyrill S Rogacev
- a Department of Internal Medicine IV , Saarland University Medical Center , Homburg , Germany.,b University Heart Center Luebeck, Medical Clinic II (Cardiology/Angiology/Intensive Care Medicine), University Hospital Schleswig-Holstein , Luebeck , Germany
| | - Björn Hummel
- c Department of Clinical Hemostaseology and Transfusion Medicine , Saarland University Medical Center , Homburg , Germany.,d Clinical Chemistry and Laboratory Medicine/Central Laboratory, Saarland University Medical Center , Homburg , Germany
| | | | - Soeren Müller
- e GenXPro GmbH , Frankfurt/Main , Germany.,f Department of Neurological Surgery , University of California, San Francisco , San Francisco , CA , USA
| | | | | | - Rima Obeid
- d Clinical Chemistry and Laboratory Medicine/Central Laboratory, Saarland University Medical Center , Homburg , Germany
| | - Jürgen Geisel
- d Clinical Chemistry and Laboratory Medicine/Central Laboratory, Saarland University Medical Center , Homburg , Germany
| | - Danilo Fliser
- a Department of Internal Medicine IV , Saarland University Medical Center , Homburg , Germany
| | - Gunnar H Heine
- a Department of Internal Medicine IV , Saarland University Medical Center , Homburg , Germany
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21
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Severe Hyperhomocysteinemia Decreases Respiratory Enzyme and Na(+)-K(+) ATPase Activities, and Leads to Mitochondrial Alterations in Rat Amygdala. Neurotox Res 2015; 29:408-18. [PMID: 26694914 DOI: 10.1007/s12640-015-9587-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/13/2015] [Accepted: 12/08/2015] [Indexed: 12/19/2022]
Abstract
Severe hyperhomocysteinemia is caused by increased plasma levels of homocysteine (Hcy), a methionine derivative, and is associated with cerebral disorders. Creatine supplementation has emerged as an adjuvant to protect against neurodegenerative diseases, due to its potential antioxidant role. Here, we examined the effects of severe hyperhomocysteinemia on brain metabolism, and evaluated a possible neuroprotective role of creatine in hyperhomocysteinemia, by concomitant treatment with Hcy and creatine (50 mg/Kg body weight). Hyperhomocysteinemia was induced in young rats (6-day-old) by treatment with homocysteine (0.3-0.6 µmol/g body weight) for 23 days, and then the following parameters of rat amygdala were evaluated: (1) the activity of the respiratory chain complexes succinate dehydrogenase, complex II and cytochrome c oxidase; (2) mitochondrial mass and membrane potential; (3) the levels of necrosis and apoptosis; and (4) the activity and immunocontent of Na(+),K(+)-ATPase. Hcy treatment decreased the activities of succinate dehydrogenase and cytochrome c oxidase, but did not alter complex II activity. Hcy treatment also increased the number of cells with high mitochondrial mass, high mitochondrial membrane potential, and in late apoptosis. Importantly, creatine administration prevented some of the key effects of Hcy administration on the amygdala. We also observed a decrease in the activity and immunocontent of the α1 subunit of the Na(+),K(+)-ATPase in amygdala after Hcy- treatment. Our findings support the notion that Hcy modulates mitochondrial function and bioenergetics in the brain, as well as Na(+),K(+)-ATPase activity, and suggest that creatine might represent an effective adjuvant to protect against the effects of high Hcy plasma levels.
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Xiao Y, Su X, Huang W, Zhang J, Peng C, Huang H, Wu X, Huang H, Xia M, Ling W. Role of S-adenosylhomocysteine in cardiovascular disease and its potential epigenetic mechanism. Int J Biochem Cell Biol 2015; 67:158-66. [PMID: 26117455 DOI: 10.1016/j.biocel.2015.06.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 06/08/2015] [Accepted: 06/16/2015] [Indexed: 12/28/2022]
Abstract
Transmethylation reactions utilize S-adenosylmethionine (SAM) as a methyl donor and are central to the regulation of many biological processes: more than fifty SAM-dependent methyltransferases methylate a broad spectrum of cellular compounds including DNA, histones, phospholipids and other small molecules. Common to all SAM-dependent transmethylation reactions is the release of the potent inhibitor S-adenosylhomocysteine (SAH) as a by-product. SAH is reversibly hydrolyzed to adenosine and homocysteine by SAH hydrolase. Hyperhomocysteinemia is an independent risk factor for cardiovascular disease. However, a major unanswered question is if homocysteine is causally involved in disease pathogenesis or simply a passive and indirect indicator of a more complex mechanism. A chronic elevation in homocysteine levels results in a parallel increase in intracellular or plasma SAH, which is a more sensitive biomarker of cardiovascular disease than homocysteine and suggests that SAH is a critical pathological factor in homocysteine-associated disorders. Previous reports indicate that supplementation with folate and B vitamins efficiently lowers homocysteine levels but not plasma SAH levels, which possibly explains the failure of homocysteine-lowering vitamins to reduce vascular events in several recent clinical intervention studies. Furthermore, more studies are focusing on the role and mechanisms of SAH in different chronic diseases related to hyperhomocysteinemia, such as cardiovascular disease, kidney disease, diabetes, and obesity. This review summarizes the current role of SAH in cardiovascular disease and its effect on several related risk factors. It also explores possible the mechanisms, such as epigenetics and oxidative stress, of SAH. This article is part of a Directed Issue entitled: Epigenetic dynamics in development and disease.
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Affiliation(s)
- Yunjun Xiao
- Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China.
| | - Xuefen Su
- The Jockey Club School of Public Health and Primary Care, School of Public Health, The Chinese University of Hong Kong, Hong Kong, China
| | - Wei Huang
- Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Jinzhou Zhang
- Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Chaoqiong Peng
- Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Haixiong Huang
- Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Xiaomin Wu
- Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Haiyan Huang
- Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Min Xia
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Wenhua Ling
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou, China.
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23
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Sun W, Pang Y, Liu Z, Sun L, Liu B, Xu M, Dong Y, Feng J, Jiang C, Kong W, Wang X. Macrophage inflammasome mediates hyperhomocysteinemia-aggravated abdominal aortic aneurysm. J Mol Cell Cardiol 2015; 81:96-106. [PMID: 25680906 DOI: 10.1016/j.yjmcc.2015.02.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 02/02/2015] [Accepted: 02/03/2015] [Indexed: 12/25/2022]
Abstract
Abdominal aortic aneurysm (AAA) is a serious vascular disease with high mortality. Our previous study suggested that hyperhomocysteinemia (HHcy) exaggerates the occurrence of AAA. Here, we investigated whether macrophage inflammasome is involved in HHcy-aggravated AAA formation. Two independent HHcy-aggravated AAA models, perivascular calcium phosphate-treated C57BL/6 mice and angiotensin II (Ang II)-infused apolipoprotein E-deficient (ApoE(-/-)) mice were used. NLPR3, caspase 1, and interleukin-1β (IL-1β) levels were higher in aneurysmal lesions of both HHcy models compared to controls, preferentially in macrophages. Similarly, macrophage inflammasome activation was observed in vitro. Folic acid administration reversed the HHcy-accelerated AAA, with ameliorated activation of inflammasome in the tunica adventitia. Lentiviral silencing of NLRP3 significantly ameliorated HHcy-aggravated AAA formation. We observed increased mitochondrial production of reactive oxygen species (ROS) and energy switch from oxidative phosphorylation to glycolysis with excess Hcy in macrophages. Blocking mitochondrial ROS production in macrophages abolished inflammasome activation. Our study highlights the potential importance of macrophage inflammasome in the pathogenesis and development of HHcy-aggravated AAA.
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Affiliation(s)
- Weiliang Sun
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China
| | - Yanli Pang
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China; Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, People's Republic of China
| | - Ziyi Liu
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China
| | - Lulu Sun
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China
| | - Bo Liu
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China
| | - Mingjiang Xu
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China
| | - Yongqiang Dong
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China
| | - Juan Feng
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China
| | - Changtao Jiang
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China
| | - Wei Kong
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China.
| | - Xian Wang
- Department of Physiology and Pathophysiology, Basic Medical College of Peking University, Beijing 100191, People's Republic of China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, People's Republic of China.
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24
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Xiao Y, Huang W, Zhang J, Peng C, Xia M, Ling W. Increased Plasma S-Adenosylhomocysteine–Accelerated Atherosclerosis Is Associated With Epigenetic Regulation of Endoplasmic Reticulum Stress in apoE
−/−
Mice. Arterioscler Thromb Vasc Biol 2015; 35:60-70. [DOI: 10.1161/atvbaha.114.303817] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Yunjun Xiao
- From the Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China (Y.X., W.H., J.Z., C.P.); and Department of Nutrition, School of Public Health, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Sun Yat-Sen University, Guangzhou, China (Y.X., M.X., W.L.)
| | - Wei Huang
- From the Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China (Y.X., W.H., J.Z., C.P.); and Department of Nutrition, School of Public Health, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Sun Yat-Sen University, Guangzhou, China (Y.X., M.X., W.L.)
| | - Jinzhou Zhang
- From the Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China (Y.X., W.H., J.Z., C.P.); and Department of Nutrition, School of Public Health, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Sun Yat-Sen University, Guangzhou, China (Y.X., M.X., W.L.)
| | - Chaoqiong Peng
- From the Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China (Y.X., W.H., J.Z., C.P.); and Department of Nutrition, School of Public Health, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Sun Yat-Sen University, Guangzhou, China (Y.X., M.X., W.L.)
| | - Min Xia
- From the Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China (Y.X., W.H., J.Z., C.P.); and Department of Nutrition, School of Public Health, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Sun Yat-Sen University, Guangzhou, China (Y.X., M.X., W.L.)
| | - Wenhua Ling
- From the Department of Nutrition and Food Hygiene, Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China (Y.X., W.H., J.Z., C.P.); and Department of Nutrition, School of Public Health, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Sun Yat-Sen University, Guangzhou, China (Y.X., M.X., W.L.)
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25
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Zawada AM, Rogacev KS, Hummel B, Berg JT, Friedrich A, Roth HJ, Obeid R, Geisel J, Fliser D, Heine GH. S-adenosylhomocysteine is associated with subclinical atherosclerosis and renal function in a cardiovascular low-risk population. Atherosclerosis 2014; 234:17-22. [DOI: 10.1016/j.atherosclerosis.2014.02.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 01/22/2014] [Accepted: 02/05/2014] [Indexed: 12/29/2022]
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26
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Zolotukhin P, Aleksandrova A, Goncharova A, Shestopalov A, Rymashevskiy A, Shkurat T. Oxidative status shifts in uterine cervical incompetence patients. Syst Biol Reprod Med 2013; 60:98-104. [PMID: 24304328 DOI: 10.3109/19396368.2013.864343] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Uterine cervical incompetence (UCI) is a pregnancy complication affecting about 10% of the pregnancies in the western world. Studying the etiology of the UCI requires a specific approach adequate for this highly heterogenous syndrome. Oxidative status disorders are associated with various pathologies, including pregnancy complications. As such, general oxidative status profiling is a promising methodology to treat UCI. We aimed at assaying the closely interrelated oxidative status markers in the uterine cervical incompetence patients by means of the systems biology-oriented approach. Chemiluminescent assay, circulating thioredoxin 1 protein, uric acid, and homocysteine level measurements were used to assess the character of the oxidative status regulation in the UCI patients. We found UCI to be associated with the atypical plasma oxidative status deregulation; UCI plasma samples demonstrated lowered proneness to the pro-oxidative processes, and this was not due to the excessive antioxidant activity. There were neither signs of oxidative stress nor destructive pro-oxidant feedforward circuit locking in the UCI group. We also report increased circulating levels of uric acid in the UCI patients.
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Affiliation(s)
- Petr Zolotukhin
- Laboratory of Biomedicine, Research Institute of Biology, Southern Federal University , Rostov-on-Don , Russia
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27
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Zolotukhin P, Kozlova Y, Dovzhik A, Kovalenko K, Kutsyn K, Aleksandrova A, Shkurat T. Oxidative status interactome map: towards novel approaches in experiment planning, data analysis, diagnostics and therapy. MOLECULAR BIOSYSTEMS 2013; 9:2085-96. [PMID: 23698602 DOI: 10.1039/c3mb70096h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Experimental evidence suggests an immense variety of processes associated with and aimed at producing reactive oxygen and/or nitrogen species. Clinical studies implicate an enormous range of pathologies associated with reactive oxygen/nitrogen species metabolism deregulation, particularly oxidative stress. Recent advances in biochemistry, proteomics and molecular biology/biophysics of cells suggest oxidative stress to be an endpoint of complex dysregulation events of conjugated pathways consolidated under the term, proposed here, "oxidative status". The oxidative status concept, in order to allow for novel diagnostic and therapeutic approaches, requires elaboration of a new logic system comprehending all the features, versatility and complexity of cellular pro- and antioxidative components of different nature. We have developed a curated and regularly updated interactive interactome map of human cellular-level oxidative status allowing for systematization of the related most up-to-date experimental data. A total of more than 600 papers were selected for the initial creation of the map. The map comprises more than 300 individual factors with respective interactions, all subdivided hierarchically for logical analysis purposes. The pilot application of the interactome map suggested several points for further development of oxidative status-based technologies.
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Affiliation(s)
- Peter Zolotukhin
- Southern Federal University, Stachki av., 194/1, Rostov-on-Don, Russia.
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28
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Ma S, Zhang H, Sun W, Gong H, Wang Y, Ma C, Wang J, Cao C, Yang X, Tian J, Jiang Y. Hyperhomocysteinemia induces cardiac injury by up-regulation of p53-dependent Noxa and Bax expression through the p53 DNA methylation in ApoE(-/-) mice. Acta Biochim Biophys Sin (Shanghai) 2013; 45:391-400. [PMID: 23619570 DOI: 10.1093/abbs/gmt030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Hyperhomocysteinemia (HHcy) is a risk factor for cardiovascular disease and has a strong correlation with heart failure. However, the effects of HHcy on cardiac tissue remain less well understood. To elucidate the role of p53-dependent apoptosis in HHcy-induced cardiac injury, we fed ApoE(-/-) mice with high methionine diet to establish HHcy model. Serum Hcy, cardiac enzymes, and lipids were measured. The protein levels of Noxa, DNMT1, caspases-3/9, and p53 were determined by enzyme-linked immunosorbent assay. Bcl-2 and Bax proteins were detected by immunohistochemistry staining. S-adenosyl methionine and S-adenosyl homocysteine concentrations were determined by high-performance liquid chromatography. The mRNA levels of p53 and DNMT1 were analyzed by real-time polymerase chain reaction (PCR) and the methylation levels of p53 were analyzed by nested methylation-specific-PCR. Our data showed that the concentrations of serum Hcy and lipids were increased in Meth group compared with the N-control group, which indicated that the model was established successfully. The expression levels of p53 and Noxa were increased in Meth group, while the methylation status of p53 was hypomethylation. The activities of caspase-3/9 were increased in Meth group compared with the N-control group. In addition, immunohistochemistry staining showed that the expression of Bax was significantly increased in Meth and Meth-F group compared with the N-control group. In summary, HHcy induces cardiac injury by up-regulation of p53-dependent pro-apoptotic related genes Noxa and Bax, while p53 DNA hypomethylation is a key molecular mechanism in pathological process induced by HHcy.
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Affiliation(s)
- Shengchao Ma
- Department of Laboratory Medical, Ningxia Medical University, Yinchuan 750004, China
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29
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Lu Q, Sakhatskyy P, Newton J, Shamirian P, Hsiao V, Curren S, Gabino Miranda GA, Pedroza M, Blackburn MR, Rounds S. Sustained adenosine exposure causes lung endothelial apoptosis: a possible contributor to cigarette smoke-induced endothelial apoptosis and lung injury. Am J Physiol Lung Cell Mol Physiol 2013; 304:L361-70. [PMID: 23316066 DOI: 10.1152/ajplung.00161.2012] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Pulmonary endothelial cell (EC) apoptosis has been implicated in the pathogenesis of emphysema. Cigarette smoke (CS) causes lung EC apoptosis and emphysema. In this study, we show that CS exposure increased lung tissue adenosine levels in mice, an effect associated with increased lung EC apoptosis and the development of emphysema. Adenosine has a protective effect against apoptosis via adenosine receptor-mediated signaling. However, sustained elevated adenosine increases alveolar cell apoptosis in adenosine deaminase-deficient mice. We established an in vitro model of sustained adenosine exposure by incubating lung EC with adenosine in the presence of an adenosine deaminase inhibitor, deoxycoformicin. We demonstrated that sustained adenosine exposure caused lung EC apoptosis via nucleoside transporter-facilitated intracellular adenosine uptake, subsequent activation of p38 and JNK in mitochondria, and ultimately mitochondrial defects and activation of the mitochondria-mediated intrinsic pathway of apoptosis. Our results suggest that sustained elevated adenosine may contribute to CS-induced lung EC apoptosis and emphysema. Our data also reconcile the paradoxical effects of adenosine on apoptosis, demonstrating that prolonged exposure causes apoptosis via nucleoside transporter-mediated intracellular adenosine signaling, whereas acute exposure protects against apoptosis via activation of adenosine receptors. Inhibition of adenosine uptake may become a new therapeutic target in treatment of CS-induced lung diseases.
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Affiliation(s)
- Qing Lu
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center, Department of Medicine, Alpert Medical School of Brown University, Providence, RI 02908, USA.
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