1
|
Liu T, Wang L, Chen G, Tong L, Ye X, Yang H, Liu H, Zhang H, Lu W, Zhang S, Du D. PDZD8-mediated endoplasmic reticulum-mitochondria associations regulate sympathetic drive and blood pressure through the intervention of neuronal mitochondrial homeostasis in stress-induced hypertension. Neurobiol Dis 2023:106173. [PMID: 37247681 DOI: 10.1016/j.nbd.2023.106173] [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: 04/10/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 05/31/2023] Open
Abstract
Neuronal hyperexcitation in the rostral ventrolateral medulla (RVLM) drives heightened sympathetic nerve activity and contributes to the etiology of stress-induced hypertension (SIH). Maintenance of mitochondrial functions is central to neuronal homeostasis. PDZD8, an endoplasmic reticulum (ER) transmembrane protein, tethers ER to mitochondria. However, the mechanisms of PDZD8-mediated ER-mitochondria associations regulating neuronal mitochondrial functions and thereby mediating blood pressure (BP) in the RVLM of SIH were largely unknown. SIH rats were subjected to intermittent electric foot shocks plus noise for 2 h twice daily for 15 consecutive days. The underlying mechanisms of PDZD8 were investigated through in vitro experiments by using small interfering RNA and through in vivo experiments, such as intra-RVLM microinjection and Western blot analysis. The function of PDZD8 on BP regulation in the RVLM was determined in vivo via the intra-RVLM microinjection of adeno-associated virus (AAV)2-r-Pdzd8. We found that the c-Fos-positive RVLM tyrosine hydroxylase (TH) neurons, renal sympathetic nerve activity (RSNA), plasma norepinephrine (NE) level, BP, and heart rate (HR) were elevated in SIH rats. ER-mitochondria associations in RVLM neurons were significantly reduced in SIH rats. PDZD8 was mainly expressed in RVLM neurons, and mRNA and protein levels were markedly decreased in SIH rats. In N2a cells, PDZD8 knockdown disrupted ER-mitochondria associations and mitochondrial structure, decreased mitochondrial membrane potential (MMP) and respiratory metabolism, enhanced ROS levels, and reduced catalase (CAT) activity. These effects suggested that PDZD8 dysregulation induced mitochondrial malfunction. By contrast, PDZD8 upregulation in the RVLM of SIH rats could rescue neuronal mitochondrial function, thereby suppressing c-Fos expression in TH neurons and decreasing RSNA, plasma NE, BP, and HR. Our results indicated that the dysregulation of PDZD8-mediated ER-mitochondria associations led to the loss of the activity homeostasis of RVLM neurons by disrupting mitochondrial functions, thereby participating in the regulation of SIH pathology.
Collapse
Affiliation(s)
- Tianfeng Liu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; College of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Linping Wang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; College of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Gaojun Chen
- College of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Lei Tong
- College of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Xuanxuan Ye
- College of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Hui Yang
- College of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Haisheng Liu
- College of Agriculture and Bioengineering, Heze University, Heze 274000, China
| | - Haili Zhang
- College of Agriculture and Bioengineering, Heze University, Heze 274000, China
| | - Wen Lu
- College of Agriculture and Bioengineering, Heze University, Heze 274000, China
| | - Shuai Zhang
- International Cooperation Laboratory of Molecular Medicine, Academy of Chinese Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China.
| | - Dongshu Du
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; College of Life Sciences, Shanghai University, Shanghai 200444, China; Shaoxing Institute of Shanghai University, Shaoxing, Zhejiang 312000, China; College of Agriculture and Bioengineering, Heze University, Heze 274000, China.
| |
Collapse
|
2
|
Renal Denervation Influences Angiotensin II Types 1 and 2 Receptors. Int J Nephrol 2022; 2022:8731357. [PMID: 36262553 PMCID: PMC9576444 DOI: 10.1155/2022/8731357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 09/05/2022] [Accepted: 09/12/2022] [Indexed: 11/17/2022] Open
Abstract
The sympathetic and renin-angiotensin systems (RAS) are two critical regulatory systems in the kidney which affect renal hemodynamics and function. These two systems interact with each other so that angiotensin II (Ang II) has the presynaptic effect on the norepinephrine secretion. Another aspect of this interaction is that the sympathetic nervous system affects the function and expression of local RAS receptors, mainly Ang II receptors. Therefore, in many pathological conditions associated with an increased renal sympathetic tone, these receptors' expression changes and renal denervation can normalize these changes and improve the diseases. It seems that the renal sympathectomy can alter Ang II receptors expression and the distribution of RAS receptors in the kidneys, which influence renal functions.
Collapse
|
3
|
Knox DB, Hirshberg EL, Orme J, Peltan I, Lanspa MJ. Effect of COVID 19 pneumonia on hyperglycemia: Is it different from non COVID pneumonia? Diabetes Metab Syndr 2022; 16:102407. [PMID: 35074624 PMCID: PMC8767985 DOI: 10.1016/j.dsx.2022.102407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 01/14/2022] [Accepted: 01/16/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND AIMS Glycemic control in critical illness has been linked to outcomes. We sought to investigate if COVID pneumonia was causing disrupted glycemic control compared to historically similar diseases. METHODS At Intermountain Healthcare, a 23-hospital healthcare system in the intermountain west, we performed a multicenter, retrospective cohort observational study. We compared 13,268 hospitalized patients with COVID pneumonia to 6673 patients with non -COVID-pneumonia. RESULTS Patients with COVID-19 were younger had fewer comorbidities, had lower mortality and greater length of hospital stay. Our regression models demonstrated that daily insulin dose, indexed for weight, was associated with COVID-19, age, diabetic status, HgbA1c, admission SOFA, ICU length of stay and receipt of corticosteroids. There was significant interaction between a diagnosis of diabetes and having COVID-19. Time in range for our IV insulin protocol was not correlated with having COVID after adjustment. It was correlated with ICU length of stay, diabetic control (HgbA1C) and prior history of diabetes. Among patients with subcutaneous (SQ) insulin only percent of glucose checks in range was correlated with diabetic status, having Covid-19, HgbA1c, total steroids given and Elixhauser comorbidity score even when controlled for other factors. CONCLUSIONS Hospitalized patients with COVID-19 pneumonia who receive insulin for glycemic control require both more SQ and IV insulin than the non-COVID-19 pneumonia counterparts. Patients with COVID-19 who received SQ insulin only had a lower percent of glucose checks in range.
Collapse
Affiliation(s)
- Daniel B Knox
- Division of Pulmonary and Critical Care Medicine, Intermountain Medical Center, Murray, UT, USA; Division of Pulmonary and Critical Care Medicine, University of Utah, Salt Lake City, UT, USA.
| | - Eliotte L Hirshberg
- Division of Pulmonary and Critical Care Medicine, Intermountain Medical Center, Murray, UT, USA; Division of Pulmonary and Critical Care Medicine, University of Utah, Salt Lake City, UT, USA
| | - James Orme
- Division of Pulmonary and Critical Care Medicine, Intermountain Medical Center, Murray, UT, USA; Division of Pulmonary and Critical Care Medicine, University of Utah, Salt Lake City, UT, USA
| | - Ithan Peltan
- Division of Pulmonary and Critical Care Medicine, Intermountain Medical Center, Murray, UT, USA; Division of Pulmonary and Critical Care Medicine, University of Utah, Salt Lake City, UT, USA
| | - Michael J Lanspa
- Division of Pulmonary and Critical Care Medicine, Intermountain Medical Center, Murray, UT, USA; Division of Pulmonary and Critical Care Medicine, University of Utah, Salt Lake City, UT, USA
| |
Collapse
|
4
|
Ooi K, Hu L, Feng Y, Han C, Ren X, Qian X, Huang H, Chen S, Shi Q, Lin H, Wang J, Zhu D, Wang R, Xia C. Sigma-1 Receptor Activation Suppresses Microglia M1 Polarization via Regulating Endoplasmic Reticulum-Mitochondria Contact and Mitochondrial Functions in Stress-Induced Hypertension Rats. Mol Neurobiol 2021; 58:6625-6646. [PMID: 34601668 DOI: 10.1007/s12035-021-02488-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 07/08/2021] [Indexed: 12/31/2022]
Abstract
Exposure to stress plays a detrimental role in the pathogenesis of hypertension via neuroinflammation pathways. Microglial neuroinflammation in the rostral ventrolateral medulla (RVLM) exacerbates stress-induced hypertension (SIH) by increasing sympathetic hyperactivity. Mitochondria of microglia are the regulators of innate immune response. Sigma-1R (σ-1R) localizes to the mitochondria-associated membranes (MAMs) and regulates endoplasmic reticulum (ER) and mitochondria communication, in part through its chaperone activity. The present study aims to investigate the protective role of σ-1R on microglial-mediated neuroinflammation. Stress-induced hypertension (SIH) was induced in rats using electric foot shocks and intermittent noise. Arterial blood pressure (ABP), heart rate (HR), and renal sympathetic nerve activity (RSNA) were measured to evaluate the sympathetic nervous system (SNS) activities. SKF10047 (100 µM), an agonist of σ-1R, was administrated to rats, then σ-1R localization and MAM alterations were detected by immuno-electron microscopy. Mitochondrial calcium homeostasis was examined in primary microglia and/or BV-2 microglia cells. The effect of SKF10047 treatment on the mitochondrial respiratory function of cultured microglia was measured using a Seahorse Extracellular Flux Analyzer. Confocal microscopic images were performed to indicate mitochondrial dynamics. Stress reduces σ-1R's localization at the MAMs, leading to decreased ER-mitochondria contact and IP3R-GRP75-VDAC calcium transport complexes expression in the RVLM of rats. SKF10047 promotes the length and coverage of MAMs in the prorenin-treated microglia. Prorenin treatment increases mitoROS levels, and inhibits Ca2+ signalling between the two organelles, therefore negatively affects ATP production in BV2 cells, and these effects are reversed by SKF10047 treatment. We found mitochondrial hyperfusion and microglial M1 polarization in prorenin-treated microglia. SKF10047 suppresses microglial M1 polarization and RVLM neuroinflammation, subsequently ameliorates sympathetic hyperactivity in stress-induced hypertensive rats. Sigma-1 receptor activation suppresses microglia M1 polarization and neuroinflammation via regulating endoplasmic reticulum-mitochondria contact and mitochondrial functions in stress-induced hypertension rats.
Collapse
Affiliation(s)
- Kokwin Ooi
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Li Hu
- Department of Cardiovascular Diseases, Renji Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Yi Feng
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Chenzhi Han
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Xiaorong Ren
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Xinyi Qian
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Haofeng Huang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Sijia Chen
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Qi Shi
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Hong Lin
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Jijiang Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Danian Zhu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China
| | - Rui Wang
- Department of Cardiovascular Diseases, Yangpu District Central Hospital Affiliated to Tongji University School of Medicine, Shanghai, 200090, People's Republic of China.
| | - Chunmei Xia
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, People's Republic of China.
| |
Collapse
|
5
|
Song Y, Bai Z, Zhang Y, Chen J, Chen M, Zhang Y, Zhang X, Mai H, Wang B, Lin Y, Gu S. Protective effects of endothelial progenitor cell microvesicles on Ang II‑induced rat kidney cell injury. Mol Med Rep 2021; 25:4. [PMID: 34738620 PMCID: PMC8600403 DOI: 10.3892/mmr.2021.12520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/14/2021] [Indexed: 12/29/2022] Open
Abstract
Chronic hypertension can lead to kidney damage, known as hypertensive nephropathy or hypertensive nephrosclerosis. Further understanding of the molecular mechanisms via which hypertensive nephropathy develops is essential for effective diagnosis and treatment. The present study investigated the mechanisms by which endothelial progenitor cells (EPCs) repair primary rat kidney cells (PRKs). ELISA, Cell Counting Kit-8 and flow cytometry assays were used to analyze the effects of EPCs or EPC-MVs on the oxidative stress, inflammation, cell proliferation, apoptosis and cycle of PRKs induced by AngII. A PRK injury model was established using angiotensin II (Ang II). After Ang II induction, PRK proliferation was decreased, apoptosis was increased and the cell cycle was blocked at the G1 phase before entering the S phase. It was found that the levels of reactive oxygen species and malondialdehyde were increased, while the levels of glutathione peroxidase and superoxide dismutase were decreased. Moreover, the levels of the inflammatory cytokines IL-1β, IL-6 and TNF-α were significantly increased. Thus, Ang II damaged PRKs by stimulating oxidative stress and promoting the inflammatory response. However, when PRKs were co-cultured with EPCs, the damage induced by Ang II was significantly reduced. The current study collected the microvesicles (MVs) secreted by EPCs and co-cultured them with Ang II-induced PRKs, and identified that EPC-MVs retained their protective effect on PRKs. In conclusion, EPCs protect PRKs from Ang II-induced damage via secreted MVs.
Collapse
Affiliation(s)
- Yanling Song
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Zhenbing Bai
- Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Yuanyuan Zhang
- Department of Cardiology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Juming Chen
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Minghui Chen
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Yunbo Zhang
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Xiaodian Zhang
- Key Laboratory of Tropical Cardiovascular Diseases Research of Hainan Province, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Huade Mai
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Bingshu Wang
- Key Laboratory of Tropical Cardiovascular Diseases Research of Hainan Province, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Yunyun Lin
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| | - Shenhong Gu
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570100, P.R. China
| |
Collapse
|
6
|
Lezama-Martinez D, Elena Hernandez-Campos M, Flores-Monroy J, Valencia-Hernandez I, Martinez-Aguilar L. Time-Dependent Effects of Individual and Combined Treatments With Nebivolol, Lisinopril, and Valsartan on Blood Pressure and Vascular Reactivity to Angiotensin II and Norepinephrine. J Cardiovasc Pharmacol Ther 2021; 26:490-499. [PMID: 33779339 DOI: 10.1177/10742484211001861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Clinical guidelines suggest the combination of 2 drugs as a strategy to treat hypertension. However, some antihypertensive combinations have been shown to be ineffective. Therefore, it is necessary to determine whether differences exist between the results of monotherapy and combination therapy by temporal monitoring of the responses to angiotensin II and norepinephrine, which are vasoconstrictors involved in the development of hypertension. Thus, the purpose of this work was to determine the vascular reactivity to angiotensin II and norepinephrine in spontaneously hypertensive rat (SHR) aortic rings after treatment with valsartan, lisinopril, nebivolol, nebivolol-lisinopril, and nebivolol-valsartan for different periods of time. In this study, male SHR and Wistar Kyoto normotensive (WKY) rats were divided into 7 groups treated for 1, 2, and 4 weeks: (1) WKY + vehicle, (2) SHR + vehicle; (3) SHR + nebivolol; (4) SHR + lisinopril; (5) SHR + valsartan; (6) SHR + nebivolol-lisinopril; and (7) SHR + nebivolol-valsartan. Blood pressure was measured by the tail-cuff method, and vascular reactivity was determined from the concentration-response curve to angiotensin II and norepinephrine in aortic rings. The results showed that the combined and individual treatments reduced mean blood pressure at all times evaluated. All treatments decreased vascular reactivity to angiotensin II; however, in the case of lisinopril and nebivolol-lisinopril, the effect observed was significant up to 2 weeks. All treatments decreased the reactivity to norepinephrine up to week 4. These results show a time-dependent difference in vascular reactivity between the pharmacological treatments, with nebivolol-valsartan and nebivolol-lisinopril being both effective combinations. Additionally, the results suggest crosstalk between the renin-angiotensin and sympathetic nervous systems to reduce blood pressure and to improve treatment efficacy.
Collapse
Affiliation(s)
- Diego Lezama-Martinez
- Laboratory of Pharmacology, F.E.S.-Cuautitlan, 7180Universidad Nacional Autonoma de Mexico, Cuautitlan Izcalli, Mexico, Mexico
- Laboratory of Pharmacodynamics, Escuela Superior de Medicina, 27740Instituto Politecnico Nacional, D.F., Mexico, Mexico
| | - Maria Elena Hernandez-Campos
- Laboratory of Pharmacodynamics, Escuela Superior de Medicina, 27740Instituto Politecnico Nacional, D.F., Mexico, Mexico
| | - Jazmin Flores-Monroy
- Laboratory of Pharmacology, F.E.S.-Cuautitlan, 7180Universidad Nacional Autonoma de Mexico, Cuautitlan Izcalli, Mexico, Mexico
| | - Ignacio Valencia-Hernandez
- Laboratory of Pharmacodynamics, Escuela Superior de Medicina, 27740Instituto Politecnico Nacional, D.F., Mexico, Mexico
| | - Luisa Martinez-Aguilar
- Laboratory of Pharmacology, F.E.S.-Cuautitlan, 7180Universidad Nacional Autonoma de Mexico, Cuautitlan Izcalli, Mexico, Mexico
| |
Collapse
|
7
|
Lacerda Leocádio PC, Dias RP, Pinto DV, Reis JM, Rodrigues Nascimento JC, Anne de Castro Brito G, Valença JT, Foureaux G, Ferreira AJ, Windmöller CC, Crespo-Lopez ME, Santos FA, Oriá RB, Alvarez-Leite JI. Pollutants and nutrition: Are methylmercury effects on blood pressure and lipoprotein profile comparable to high-fat diet in mice? ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 204:111036. [PMID: 32784013 DOI: 10.1016/j.ecoenv.2020.111036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 06/11/2023]
Abstract
Human exposure to methylmercury (MeHg) due to contaminated fish intake as part of a high-fat (HFD), high-carbohydrate diets is a reality today for many populations. HFD is associated with hypertension and hyperlipidemia, primary cardiovascular disease (CVD) risk factors. Some studies suggest that MeHg induces those risk factors. We evaluated the effect of MeHg exposure in mice fed with HFD or control diet for eight weeks. In the last experimental 15 days, the half group received a MeHg solution (20 mg/L) replacing water. Blood pressure (BP), heart rate, lipoprotein concentrations, and paraoxonase activity were evaluated. Liver cholesterol, triacylglycerol, and IBA-1+ cells, as well as transcriptional levels of genes related to lipid metabolism and inflammatory response, were also assessed. HFD and both MeHg groups presented increased BP and total cholesterol (TC). In the liver, HFD but not MeHg was related to an increase in TC. Also, MeHg intoxication reduced paraoxonase activity regardless of diet. MeHg intoxication and HFD increased steatosis and the number of IBA-1+ cells and modified some gene transcripts associated with lipid metabolism. In conclusion, we demonstrated that MeHg effects on CVD risk factors resemble those caused by HFD.
Collapse
|
8
|
Chen MJ, Wei YJ, Dong XX, Liu JY, Chen QY, Zhang GX. The effect of candesartan on chronic stress induced imbalance of glucose homeostasis. Biomed Pharmacother 2020; 128:110300. [PMID: 32485572 DOI: 10.1016/j.biopha.2020.110300] [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: 04/10/2020] [Revised: 05/16/2020] [Accepted: 05/20/2020] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE To explore whether chronic stress induces imbalance of glucose homeostasis, and to investigate the possible involvement of the renin-angiotensin system (RAS). METHODS Male Sprague-Dawley rats were divided into four groups: control, chronic stress, chronic stress plus low dose candesartan (an angiotensin II receptor-1 blocker, ARB, 5 mg/kg/d, i.p.), chronic stress plus high dose candesartan (15 mg/kg/d, i.p.). Rats were received restraint stress for 14 days. Glucose transporter 2 (GLUT2) mRNA was quantified in liver by real-time polymerase chain reaction. The concentration of glucokinase (GK), glucose-6-phosphatase (G-6-P), glycogen synthase (GS), insulin receptor (ISR), glucocorticoid receptor (GR)-alpha and -beta in liver, hexokinase (HK), lactate dehydrogenase (LDH) and succinate dehydrogenase (SDH) in muscle, and serum insulin were measured by ELISA. Body weights, systolic blood pressure, heart rate and fasting blood glucose were monitored. Glucose tolerance test were performed after 14 days restraint stress. RESULTS After 14 days restraint stress, systolic blood pressure, increase of plasma glucose concentration at 15 minutes were higher and the fasting plasma concentration of glucose was lower compared with control group (P < 0.05), which were reversed by high dose ARB treatment (P < 0.05). In addition, chronic stress decreased expression of GLUT2 and increased expression of GR beta in liver. High dose ARB treatment normalized GLUT2 and GR beta expressions in liver. CONCLUSIONS Our present data indicate chronic stress induces the imbalance of glucose homeostasis and RAS contributes to the imbalance of glucose homeostasis induced by chronic stress.
Collapse
Affiliation(s)
- Ming-Jia Chen
- Department of Physiology, Medical College of Soochow University, 199 Ren-Ai Road, Dushu Lake Campus, Suzhou Industrial Park, Suzhou 215123, PR China
| | - Yu-Jia Wei
- Department of Physiology, Medical College of Soochow University, 199 Ren-Ai Road, Dushu Lake Campus, Suzhou Industrial Park, Suzhou 215123, PR China
| | - Xing-Xuan Dong
- Department of Physiology, Medical College of Soochow University, 199 Ren-Ai Road, Dushu Lake Campus, Suzhou Industrial Park, Suzhou 215123, PR China
| | - Jie-Yu Liu
- Department of Physiology, Medical College of Soochow University, 199 Ren-Ai Road, Dushu Lake Campus, Suzhou Industrial Park, Suzhou 215123, PR China
| | - Qiu-Yu Chen
- Department of Physiology, Medical College of Soochow University, 199 Ren-Ai Road, Dushu Lake Campus, Suzhou Industrial Park, Suzhou 215123, PR China
| | - Guo-Xing Zhang
- Department of Physiology, Medical College of Soochow University, 199 Ren-Ai Road, Dushu Lake Campus, Suzhou Industrial Park, Suzhou 215123, PR China.
| |
Collapse
|
9
|
Zhang S, Hu L, Jiang J, Li H, Wu Q, Ooi K, Wang J, Feng Y, Zhu D, Xia C. HMGB1/RAGE axis mediates stress-induced RVLM neuroinflammation in mice via impairing mitophagy flux in microglia. J Neuroinflammation 2020; 17:15. [PMID: 31924219 PMCID: PMC6953162 DOI: 10.1186/s12974-019-1673-3] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 12/11/2019] [Indexed: 12/15/2022] Open
Abstract
Background Microglial mediated neuroinflammation in the rostral ventrolateral medulla (RVLM) plays roles in the etiology of stress-induced hypertension (SIH). It was reported that autophagy influenced inflammation via immunophenotypic switching of microglia. High-mobility group box 1 (HMGB1) acts as a regulator of autophagy and initiates the production of proinflammatory cytokines (PICs), but the underlying mechanisms remain unclear. Methods The stressed mice were subjected to intermittent electric foot shocks plus noises administered for 2 h twice daily for 15 consecutive days. In mice, blood pressure (BP) and renal sympathetic nerve activity (RSNA) were monitored by noninvasive tail-cuff method and platinum-iridium electrodes placed respectively. Microinjection of siRNA-HMGB1 (siHMGB1) into the RVLM of mice to study the effect of HMGB1 on microglia M1 activation was done. mRFP-GFP-tandem fluorescent LC3 (tf-LC3) vectors were transfected into the RVLM to evaluate the process of autolysosome formation/autophagy flux. The expression of RAB7, lysosomal-associated membrane protein 1 (LAMP1), and lysosomal pH change were used to evaluate lysosomal function in microglia. Mitophagy was identified by transmission electron microscopic observation or by checking LC3 and MitoTracker colocalization under a confocal microscope. Results We showed chronic stress increased cytoplasmic translocations of HMGB1 and upregulation of its receptor RAGE expression in microglia. The mitochondria injury, oxidative stress, and M1 polarization were attenuated in the RVLM of stressed Cre-CX3CR1/RAGEfl/fl mice. The HMGB1/RAGE axis increased at the early stage of stress-induced mitophagy flux while impairing the late stages of mitophagy flux in microglia, as revealed by decreased GFP fluorescence quenching of GFP-RFP-LC3-II puncta and decreased colocalization of lysosomes with mitochondria. The expressions of RAB7 and LAMP1 were decreased in the stressed microglia, while knockout of RAGE reversed these effects and caused an increase in acidity of lysosomes. siHMGB1 in the RVLM resulted in BP lowering and RSNA decreasing in SIH mice. When the autophagy inducer, rapamycin, is used to facilitate the mitophagy flux, this treatment results in attenuated NF-κB activation and reduced PIC release in exogenous disulfide HMGB1 (ds-HMGB1)-stimulated microglia. Conclusions Collectively, we demonstrated that inhibition of the HMGB1/RAGE axis activation led to increased stress-induced mitophagy flux, hence reducing the activity of microglia-mediated neuroinflammation and consequently reduced the sympathetic vasoconstriction drive in the RVLM. Electronic supplementary material The online version of this article (10.1186/s12974-019-1673-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Shutian Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, No. 130, Dongan Road, Shanghai, 200032, People's Republic of China.,Clinical Medicine (Eight-year Program), Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Li Hu
- Laboratory of Neuropharmacology and Neurotoxicology, Shanghai Key Laboratory of Bio-Energy Crops, College of Life Science, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Jialun Jiang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, No. 130, Dongan Road, Shanghai, 200032, People's Republic of China
| | - Hongji Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, No. 130, Dongan Road, Shanghai, 200032, People's Republic of China
| | - Qin Wu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, No. 130, Dongan Road, Shanghai, 200032, People's Republic of China
| | - Kokwin Ooi
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, No. 130, Dongan Road, Shanghai, 200032, People's Republic of China
| | - Jijiang Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, No. 130, Dongan Road, Shanghai, 200032, People's Republic of China
| | - Yi Feng
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Danian Zhu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, No. 130, Dongan Road, Shanghai, 200032, People's Republic of China
| | - Chunmei Xia
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, No. 130, Dongan Road, Shanghai, 200032, People's Republic of China.
| |
Collapse
|
10
|
Azadbakht MK, Hassanshahi J, Nematbakhsh M. The Role of Angiotensin II Infusion on the Baroreflex Sensitivity and Renal Function in Intact and Bilateral Renal Denervation Rats. Adv Biomed Res 2018; 7:52. [PMID: 29657937 PMCID: PMC5887788 DOI: 10.4103/abr.abr_192_17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Background The role of renin-angiotensin system (RAS) in communication between renal system and cardiovascular system is extremely important. Baroreflex sensitivity (BRS) index defines as heart rate (HR) alteration versus mean arterial pressure (MAP) change ratio . Sympathetic nerve is arm of the baroreflexes and any change in its activity will lead to change in the BRS. The role of angiotensin II (Ang II) infusion in systemic circulation accompanied with bilateral renal denervation (RDN) on BRS index and renal function was studied. Materials and Methods Seventy-two male and female Wistar rats in 12 groups were anesthetized and catheterized. The alteration of MAP and HR responses to phenylephrine infusion compared to control groups was determined in bilateral RDN rats subjected to treat with Ang II (300 or 1000 ng/kg/min) administration. Results The BRS index was elevated in Ang II-treated non-RDN (normal) male rats gradually and dose dependently (P < 0.05), while this index was significantly different when compared with RDN male rats (P < 0.05). Accordingly, the BRS index was significantly lower in RDN than non-RDN male rats, and such observation was not observed in female rats. The creatinine clearance (insignificantly) and urine flow (significantly; P < 0.05) were decreased in both non-RDN and RDN male and female rats treated with Ang II. In RDN model, the serum nitrite levels were decreased in male and increased in female by Ang II infusion when compared with vehicle infusion. Conclusion The Ang II infusion could increase the BRS index in non-RDN (normal) male rats which is significantly greater than BRS index in RDN rats.
Collapse
Affiliation(s)
- Mohammad Karim Azadbakht
- Water and Electrolytes Research Center/Department of Physiology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Jalal Hassanshahi
- Water and Electrolytes Research Center/Department of Physiology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mehdi Nematbakhsh
- Water and Electrolytes Research Center/Department of Physiology, Isfahan University of Medical Sciences, Isfahan, Iran
| |
Collapse
|
11
|
Ribeiro VS, Cabral EV, Vieira LD, Aires RS, Farias JS, Muzi-Filho H, Vieyra A, Paixão AD. Perinatal α-tocopherol overload programs alterations in kidney development and renal angiotensin II signaling pathways at birth and at juvenile age: Mechanisms underlying the development of elevated blood pressure. Biochim Biophys Acta Mol Basis Dis 2018; 1864:2458-2471. [PMID: 29654944 DOI: 10.1016/j.bbadis.2018.04.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 03/26/2018] [Accepted: 04/10/2018] [Indexed: 12/15/2022]
Abstract
α-Tocopherol (α-Toc) overload increases the risk of dying in humans (E.R. Miller III et al. Meta-analysis: high-dosage vitamin E supplementation may increase all-cause mortality Ann Int Med. 142 (2005) 37-46), and overload during early development leads to elevation of blood pressure at adult life, but the mechanism(s) remains unknown. We hypothesized that α-Toc overload during organogenesis affects the renal renin angiotensin system (RAS) components and renal Na+ handling, culminating with late elevated blood pressure. Pregnant Wistar rats received α-Toc or the superoxide dismutase mimetic tempol throughout pregnancy. We evaluated components of the intrarenal renin angiotensin system in neonate and juvenile offspring: Ang II-positive cells, Ang II receptors (AT1 and AT2), linked protein kinases, O2- production, NADPH oxidase abundance, lipid peroxidation and activity of Na+-transporting ATPases. In juvenile offspring we followed the evolution of arterial blood pressure. Neonates from α-Toc and tempol mothers presented with accentuated retardment in tubular development, pronounced decrease in glomerular Ang II-positive cells and AT1/AT2 ratio, intense production of O2- and upregulation of the α, ε and λ PKC isoforms. α-Toc decreased or augmented the abundance of renal (Na++K+)ATPase depending on the age and α-Toc dose. In juvenile rats the number of Ang II-positive cells returned to control values as well as PKCα, but co-existing with marked upregulation in the activity of (Na++K+) and Na+-ATPase and elevated arterial pressure at 30 days. We conclude that the mechanisms of these alterations rely on selective targeting of renal RAS components through genic and pro-oxidant effects of the vitamin.
Collapse
Affiliation(s)
- Valdilene S Ribeiro
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Edjair V Cabral
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil; National Center of Structural Biology and Bioimaging/CENABIO, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | - Leucio D Vieira
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil; National Center of Structural Biology and Bioimaging/CENABIO, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | - Regina S Aires
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Juliane S Farias
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Humberto Muzi-Filho
- National Center of Structural Biology and Bioimaging/CENABIO, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil; Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil; National Institute in Science and Technology for Regenerative Medicine, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil
| | - Adalberto Vieyra
- National Center of Structural Biology and Bioimaging/CENABIO, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil; Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil; National Institute in Science and Technology for Regenerative Medicine, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil; Graduate Program in Translational Biomedicine, Grande Rio University, Duque de Caxias 25071-202, Rio de Janeiro, Brazil
| | - Ana D Paixão
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil; National Center of Structural Biology and Bioimaging/CENABIO, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Rio de Janeiro, Brazil.
| |
Collapse
|
12
|
Cevik B, Tekcan A, Inanir A, Kurt SG, Yigit S. The investigation of association between IL-1Ra and ACE I/D polymorphisms in carpal tunnel syndrome. J Clin Lab Anal 2017; 32. [PMID: 28370589 DOI: 10.1002/jcla.22204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 02/22/2017] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Carpal tunnel syndrome (CTS) is a common neurologic impairment caused by injury on the median nerve in the wrist, characterized by pain and loss of sensory. CTS usually occurs through three factors, such as a mechanical pressure on median nerve, immunologic changes, and oxidative stress. The aim of this study was to evaluate the influence of interleukin-1 receptor antagonist (IL-1Ra) and angiotensin-converting enzyme (ACE) I/D polymorphisms on the susceptibility of patients to the CTS. METHODS One hundred fifty-eight patients with CTS and 151 healthy controls were enrolled in this study. Each patient was analyzed according to diseases symptoms, such as gender, a positive Tinel's sign, a positive Phalen maneuver, disease sides, EMG findings, and clinical stage. We applied the polymerase chain reaction (PCR) to determine the polymorphisms of IL-1Ra and ACE I/D. RESULTS The statistically significant relation was not found between IL-1Ra, ACE I/D polymorphisms and CTS (respectively, P>.05; P>.05, OR: 1.51, CI: 0.82-1.61). Additionally, in the result of the statistical analysis compared with gene polymorphisms and clinical characteristics, we did not find any correlation (P>.05). CONCLUSIONS Our findings showed that there are no associations of IL-1Ra and ACE I/D polymorphisms with susceptibility of a person for the development of CTS. So, it means that these polymorphisms do not create a risk for the development of CTS. Further studies with larger populations will be required to confirm these findings in different study populations.
Collapse
Affiliation(s)
- Betul Cevik
- Faculty of Medicine, Department of Neurology, Gaziosmanpasa University, Tokat, Turkey
| | - Akin Tekcan
- Faculty of Medicine, Department of Medical Biology, Ahi Evran University, Kirsehir, Turkey
| | - Ahmet Inanir
- Faculty of Medicine, Department of Physical Medicine and Rehabilitation, Gaziosmanpasa University, Tokat, Turkey.,Academic Pain-Hernia Center, Samsun, Turkey
| | - Semiha Gulsum Kurt
- Faculty of Medicine, Department of Neurology, Gaziosmanpasa University, Tokat, Turkey
| | - Serbulent Yigit
- Faculty of Medicine, Department of Medical Biology, Gaziosmanpasa University, Tokat, Turkey
| |
Collapse
|
13
|
Effects of Extracts from Tiaozhi Granule and Its Components on Expression of Scavenger Receptor Class B Type I. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2016:9238512. [PMID: 28050195 PMCID: PMC5168482 DOI: 10.1155/2016/9238512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 10/23/2016] [Accepted: 11/20/2016] [Indexed: 11/17/2022]
Abstract
Sera from the rats with different drug treatments (atorvastatin, Tiaozhi granule, or its extracts) were collected. LO-2 cells or HepG2 cells were pretreated with different sera as the following groups randomly: (1) blank control group, (2) positive control group (atorvastatin group), (3) Tiaozhi granule water extract groups, (4) Tiaozhi granule alcohol extract groups, and (5) alcohol extracts for each component: Pollen Typhae Angustifoliae, Curcuma longa L., and Rhizoma Alismatis. LO-2 cells were cotransfected with plasmid carrying SR-BI and pRL-TK promoter genes. Promoter activity was measured by the luciferase reporter gene assay. The mRNA and protein expressions of SR-BI were examined using real-time PCR and western blot analyses. Our results show that promoter activity and mRNA and protein expression levels of the SR-BI were significantly upregulated by Tiaozhi granules alcohol or water extracts in a dose-dependent manner. Pollen Typhae Angustifoliae alcohol extract with a high dosage could also increase SR-BI activity and expression, but not the extracts from Curcuma longa L. and Rhizoma Alismatis. Both Tiaozhi granule alcohol and water extracts can upregulate SR-BI gene expression. Among the components, Pollen Typhae Angustifoliae are important for the regulatory effect coordinating with Curcuma longa L. and Rhizoma Alismatis.
Collapse
|