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Arnaud C, Billoir E, de Melo Junior AF, Pereira SA, O'Halloran KD, Monteiro EC. Chronic intermittent hypoxia-induced cardiovascular and renal dysfunction: from adaptation to maladaptation. J Physiol 2023; 601:5553-5577. [PMID: 37882783 DOI: 10.1113/jp284166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 10/12/2023] [Indexed: 10/27/2023] Open
Abstract
Chronic intermittent hypoxia (CIH) is the dominant pathological feature of human obstructive sleep apnoea (OSA), which is highly prevalent and associated with cardiovascular and renal diseases. CIH causes hypertension, centred on sympathetic nervous overactivity, which persists following removal of the CIH stimulus. Molecular mechanisms contributing to CIH-induced hypertension have been carefully delineated. However, there is a dearth of knowledge on the efficacy of interventions to ameliorate high blood pressure in established disease. CIH causes endothelial dysfunction, aberrant structural remodelling of vessels and accelerates atherosclerotic processes. Pro-inflammatory and pro-oxidant pathways converge on disrupted nitric oxide signalling driving vascular dysfunction. In addition, CIH has adverse effects on the myocardium, manifesting atrial fibrillation, and cardiac remodelling progressing to contractile dysfunction. Sympatho-vagal imbalance, oxidative stress, inflammation, dysregulated HIF-1α transcriptional responses and resultant pro-apoptotic ER stress, calcium dysregulation, and mitochondrial dysfunction conspire to drive myocardial injury and failure. CIH elaborates direct and indirect effects in the kidney that initially contribute to the development of hypertension and later to chronic kidney disease. CIH-induced morphological damage of the kidney is dependent on TLR4/NF-κB/NLRP3/caspase-1 inflammasome activation and associated pyroptosis. Emerging potential therapies related to the gut-kidney axis and blockade of aryl hydrocarbon receptors (AhR) are promising. Cardiorenal outcomes in response to intermittent hypoxia present along a continuum from adaptation to maladaptation and are dependent on the intensity and duration of exposure to intermittent hypoxia. This heterogeneity of OSA is relevant to therapeutic treatment options and we argue the need for better stratification of OSA phenotypes.
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Affiliation(s)
- Claire Arnaud
- Université Grenoble-Alpes INSERM U1300, Laboratoire HP2, Grenoble, France
| | - Emma Billoir
- Université Grenoble-Alpes INSERM U1300, Laboratoire HP2, Grenoble, France
| | | | - Sofia A Pereira
- iNOVA4Health, NOVA Medical School, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Ken D O'Halloran
- Department of Physiology, School of Medicine, College of Medicine & Health, University College Cork, Cork, Ireland
| | - Emilia C Monteiro
- iNOVA4Health, NOVA Medical School, Universidade NOVA de Lisboa, Lisboa, Portugal
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Liang RN, Yan DQ, Zhang XP, Chen X, Zhang WH, Jia HL. Kidney Mesenchymal stem cells alleviate cisplatin-induced kidney injury and apoptosis in rats. Tissue Cell 2023; 80:101998. [PMID: 36529038 DOI: 10.1016/j.tice.2022.101998] [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: 06/27/2022] [Revised: 12/03/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE This experiment was designed to demonstrate Mesenchymal stem cells (MSCs) derived from kidney can alleviate cisplatin-induced kidney injury and renal cell apoptosis through paracrine pathway. METHODS Firstly, MSCs were isolated from kidney of young rats, and their surface-specific markers were identified by Reverse Transcription-Polymerase Chain Reaction (RT-PCR) and immunofluorescence staining. Self-renewal ability of Kidney Mesenchymal Stem Cells (KMSCs) was observed by cell counting and 5-Bromo-2'-deoxyuridine (BrdU) fluorescence staining. KMSCs at logarithmic growth stage were traced and injected into rat through tail vein. RESULTS The results showed that KMSCs homed in the kidney tissues, decreased the secretion of inflammatory factors (CRP, TNFα, IL-1β, IL-6), and alleviated renal function. Hematoxylin and Eosin (H&E), Masson and Periodic Acid-silver Methenamine (PASM) staining showed that KMSCs could alleviate pathological damage in rats. Terminal Deoxynucleotidyl Transferase mediated dUTP Nick-End Labeling (TUNEL) assay showed that KMSCs could reduce the apoptosis of rat kidney cells induced by cisplatin. Finally, Immunohistochemistry (IHC) results showed that cisplatin could induce higher expression of the pro-apoptotic protein Bax and lower expression of anti-apoptotic Bcl-2 in kidney tissues. However, KMSCs could reverse the pro-apoptotic effect of cisplatin on kidney cells and improve the survival rate of rats. CONCLUSIONS In conclusion, KMSCs were successfully isolated from kidney tissues, and KMSCs have therapeutic effects on rat kidney injury induced by cisplatin.
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Affiliation(s)
- Rui-Ning Liang
- Fourth Clinical Medical College of Xinjiang Medical University, Urumqi, Xinjiang 830099, PR China; Affiliated Hospital of Traditional Chinese Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830000, PR China.
| | - De-Qi Yan
- Fourth Clinical Medical College of Xinjiang Medical University, Urumqi, Xinjiang 830099, PR China; Affiliated Hospital of Traditional Chinese Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830000, PR China
| | - Xing-Ping Zhang
- Fourth Clinical Medical College of Xinjiang Medical University, Urumqi, Xinjiang 830099, PR China; Affiliated Hospital of Traditional Chinese Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830000, PR China.
| | - Xu Chen
- Fourth Clinical Medical College of Xinjiang Medical University, Urumqi, Xinjiang 830099, PR China; Affiliated Hospital of Traditional Chinese Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830000, PR China
| | - Wen-Hui Zhang
- Fourth Clinical Medical College of Xinjiang Medical University, Urumqi, Xinjiang 830099, PR China; Affiliated Hospital of Traditional Chinese Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830000, PR China
| | - Hong-Lin Jia
- Fourth Clinical Medical College of Xinjiang Medical University, Urumqi, Xinjiang 830099, PR China; Affiliated Hospital of Traditional Chinese Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830000, PR China
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Intermittent Hypoxia-Induced Cardiomyocyte Death Is Mediated by HIF-1 Dependent MAM Disruption. Antioxidants (Basel) 2022; 11:antiox11081462. [PMID: 36009181 PMCID: PMC9405320 DOI: 10.3390/antiox11081462] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 12/04/2022] Open
Abstract
Rationale: Intermittent hypoxia (IH) is one of the main features of sleep-disordered breathing (SDB). Recent findings indicate that hypoxia inducible factor-1 (HIF-1) promotes cardiomyocytes apoptosis during chronic IH, but the mechanisms involved remain to be elucidated. Here, we hypothesize that IH-induced ER stress is associated with mitochondria-associated ER membrane (MAM) alteration and mitochondrial dysfunction, through HIF-1 activation. Methods: Right atrial appendage biopsies from patients with and without SDB were used to determine HIF-1α, Grp78 and CHOP expressions. Wild-type and HIF-1α+/− mice were exposed to normoxia (N) or IH (21–5% O2, 60 cycles/h, 8 h/day) for 21 days. Expressions of HIF-1α, Grp78 and CHOP, and apoptosis, were measured by Western blot and immunochemistry. In isolated cardiomyocytes, we examined structural integrity of MAM by proximity ligation assay and their function by measuring ER-to-mitochondria Ca2+ transfer by confocal microscopy. Finally, we measured mitochondrial respiration using oxygraphy and calcium retention capacity (CRC) by spectrofluorometry. MAM structure was also investigated in H9C2 cells incubated with 1 mM CoCl2, a potent HIF-1α inducer. Results: In human atrial biopsies and mice, IH induced HIF-1 activation, ER stress and apoptosis. IH disrupted MAM, altered Ca2+ homeostasis, mitochondrial respiration and CRC. Importantly, IH had no effect in HIF-1α+/− mice. Similar to what observed under IH, HIF-1α overexpression was associated with MAM alteration in H9C2. Conclusion: IH-induced ER stress, MAM alterations and mitochondrial dysfunction were mediated by HIF-1; all these intermediate mechanisms ultimately inducing cardiomyocyte apoptosis. This suggests that HIF-1 modulation might limit the deleterious cardiac effects of SDB.
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Choi D, Yun T, Lee D, Koo Y, Chae Y, Yang MP, Kang BT, Kim H. Serum concentrations of leptin and adiponectin in dogs with chronic kidney disease. J Vet Intern Med 2022; 36:1330-1340. [PMID: 35621133 PMCID: PMC9308420 DOI: 10.1111/jvim.16463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 05/10/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND An imbalance in adipokines is associated with the progression of chronic kidney disease (CKD) in humans. However, alterations in adipokines in dogs with CKD remain unclear. OBJECTIVES To examine whether adipokine concentrations in serum differ between healthy dogs and dogs with CKD and to determine the correlation between serum adipokine concentrations and CKD severity in dogs. ANIMALS Twenty dogs with CKD and 10 healthy dogs. METHODS In this cross-sectional study, serum concentrations of leptin, adiponectin, interleukin (IL)-6, IL-10, IL-18, and tumor necrosis factor (TNF)-α were measured in healthy dogs and dogs with CKD, which were classified according to the International Renal Interest Society guidelines. RESULTS Serum leptin concentrations were positively correlated with systolic arterial blood pressure (r = .41), creatinine concentrations (r = .39), and symmetric dimethylarginine concentrations (r = .73). Serum adiponectin concentrations (median [range]) in CKD dogs with borderline or non-proteinuric (20.25 [14.9-45.8] ng/mL) were significantly higher than those in proteinuric CKD dogs (13.95 [6.4-22.1] ng/mL; P = .01). Serum IL-6 (median [range]; 43.27 [24.30-537.30] vs 25.63 [6.83-61.03] pg/mL; P = .02), IL-18 (median [range]; 25.98 [11.52-280.55] vs 10.77 [3.53-38.45] pg/mL; P = .01), and TNF-α (median [range]) concentrations (11.44 [8.54-38.45] vs 6.105 [3.97-30.68] pg/mL; P = .02) were significantly different between proteinuric and borderline or non-proteinuric CKD dogs. CONCLUSIONS AND CLINICAL IMPORTANCE leptin and adiponectin concentrations in serum might be associated with severity of CKD and proteinuria in dogs with CKD, respectively.
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Affiliation(s)
- Dongjoon Choi
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Taesik Yun
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Dohee Lee
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Yoonhoi Koo
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Yeon Chae
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Mhan-Pyo Yang
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Byeong-Teck Kang
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Hakhyun Kim
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
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Li D, Xu N, Hou Y, Ren W, Zhang N, Wang X, Sun Y, Lu W, Qu G, Yu Y, Lv C, Han F. Abnormal lipid droplets accumulation induced cognitive deficits in obstructive sleep apnea syndrome mice via JNK/SREBP/ACC pathway but not through PDP1/PDC pathway. Mol Med 2022; 28:3. [PMID: 35030992 PMCID: PMC8760803 DOI: 10.1186/s10020-021-00427-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 12/17/2021] [Indexed: 11/25/2022] Open
Abstract
The mechanisms of chronic intermittent hypoxia (CIH)-induced cognitive deficits remain unclear. Here, our study found that about 3 months CIH treatment induced lipid droplets (LDs) accumulation in hippocampal nerve and glia cells of C57BL/6 mice, and caused severe neuro damage including neuron lesions, neuroblast (NB) apoptosis and abnormal glial activation. Studies have shown that the neuronal metabolism disorders might contribute to the CIH induced-hippocampal impairment. Mechanistically, the results showed that pyruvate dehydrogenase complex E1ɑ subunit (PDHA1) and the pyruvate dehydrogenase complex (PDC) activator pyruvate dehydrogenase phosphatase 1 (PDP1) did not noticeable change after intermittent hypoxia. Consistent with those results, the level of Acetyl-CoA in hippocampus did not significantly change after CIH exposure. Interestingly, we found that CIH produced large quantities of ROS, which activated the JNK/SREBP/ACC pathway in nerve and glia cells. ACC catalyzed the carboxylation of Acetyl-CoA to malonyl-CoA and then more lipid acids were synthesized, which finally caused aberrant LDs accumulation. Therefore, the JNK/SREBP/ACC pathway played a crucial role in the cognitive deficits caused by LDs accumulation after CIH exposure. Additionally, LDs were peroxidized by the high level of ROS under CIH conditions. Together, lipid metabolic disorders contributed to nerve and glia cells damage, which ultimately caused behavioral dysfunction. An active component of Salvia miltiorrhiza, SMND-309, dramatically alleviated these injuries and improved cognitive deficits of CIH mice.
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Affiliation(s)
- Dongze Li
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China
| | - Na Xu
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China
| | - Yanyan Hou
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China
| | - Wenjing Ren
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China
| | - Na Zhang
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China
| | - Xi Wang
- Yantai Affiliated Hospital of Binzhou Medical University, 717 Jinbu Street, YanTai, 264199, China
| | - Yeying Sun
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China
| | - Wenxue Lu
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China
| | - Guiwu Qu
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China
| | - Yan Yu
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China.
| | - Changjun Lv
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China.
| | - Fang Han
- Binzhou Medical University, 346 Guanhai Road, YanTai, 264003, China.
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Arabi T, Shafqat A, Sabbah BN, Fawzy NA, Shah H, Abdulkader H, Razak A, Sabbah AN, Arabi Z. Obesity-related kidney disease: Beyond hypertension and insulin-resistance. Front Endocrinol (Lausanne) 2022; 13:1095211. [PMID: 36726470 PMCID: PMC9884830 DOI: 10.3389/fendo.2022.1095211] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/22/2022] [Indexed: 01/19/2023] Open
Abstract
Chronic kidney disease (CKD) causes considerable morbidity, mortality, and health expenditures worldwide. Obesity is a significant risk factor for CKD development, partially explained by the high prevalence of diabetes mellitus and hypertension in obese patients. However, adipocytes also possess potent endocrine functions, secreting a myriad of cytokines and adipokines that contribute to insulin resistance and induce a chronic low-grade inflammatory state thereby damaging the kidney. CKD development itself is associated with various metabolic alterations that exacerbate adipose tissue dysfunction and insulin resistance. This adipose-renal axis is a major focus of current research, given the rising incidence of CKD and obesity. Cellular senescence is a biologic hallmark of aging, and age is another significant risk factor for obesity and CKD. An elevated senescent cell burden in adipose tissue predicts renal dysfunction in animal models, and senotherapies may alleviate these phenotypes. In this review, we discuss the direct mechanisms by which adipose tissue contributes to CKD development, emphasizing the potential clinical importance of such pathways in augmenting the care of CKD.
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Affiliation(s)
- Tarek Arabi
- College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
- *Correspondence: Tarek Arabi,
| | - Areez Shafqat
- College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | | | | | - Hassan Shah
- College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | | | - Adhil Razak
- College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | | | - Ziad Arabi
- Division of Nephrology, Department of Medicine, King Abdulaziz Medical City, Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
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Correia MJ, Pimpão AB, Lopes-Coelho F, Sequeira CO, Coelho NR, Gonçalves-Dias C, Barouki R, Coumoul X, Serpa J, Morello J, Monteiro EC, Pereira SA. Aryl Hydrocarbon Receptor and Cysteine Redox Dynamics Underlie (Mal)adaptive Mechanisms to Chronic Intermittent Hypoxia in Kidney Cortex. Antioxidants (Basel) 2021; 10:antiox10091484. [PMID: 34573115 PMCID: PMC8469308 DOI: 10.3390/antiox10091484] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 12/31/2022] Open
Abstract
We hypothesized that an interplay between aryl hydrocarbon receptor (AhR) and cysteine-related thiolome at the kidney cortex underlies the mechanisms of (mal)adaptation to chronic intermittent hypoxia (CIH), promoting arterial hypertension (HTN). Using a rat model of CIH-HTN, we investigated the impact of short-term (1 and 7 days), mid-term (14 and 21 days, pre-HTN), and long-term intermittent hypoxia (IH) (up to 60 days, established HTN) on CYP1A1 protein level (a sensitive hallmark of AhR activation) and cysteine-related thiol pools. We found that acute and chronic IH had opposite effects on CYP1A1 and the thiolome. While short-term IH decreased CYP1A1 and increased protein-S-thiolation, long-term IH increased CYP1A1 and free oxidized cysteine. In addition, an in vitro administration of cystine, but not cysteine, to human endothelial cells increased Cyp1a1 expression, supporting cystine as a putative AhR activator. This study supports CYP1A1 as a biomarker of obstructive sleep apnea (OSA) severity and oxidized pools of cysteine as risk indicator of OSA-HTN. This work contributes to a better understanding of the mechanisms underlying the phenotype of OSA-HTN, mimicked by this model, which is in line with precision medicine challenges in OSA.
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Affiliation(s)
- Maria João Correia
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
| | - António B. Pimpão
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
| | - Filipa Lopes-Coelho
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
- Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG), Rua Prof Lima Basto, 1099-023 Lisboa, Portugal
| | - Catarina O. Sequeira
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
| | - Nuno R. Coelho
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
| | - Clara Gonçalves-Dias
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
| | - Robert Barouki
- INSERM UMR-S 1124, 3TS, Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, Université de Paris, 45 rue des Saints-Pères, 75006 Paris, France; (R.B.); (X.C.)
| | - Xavier Coumoul
- INSERM UMR-S 1124, 3TS, Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, Université de Paris, 45 rue des Saints-Pères, 75006 Paris, France; (R.B.); (X.C.)
| | - Jacinta Serpa
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
- Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG), Rua Prof Lima Basto, 1099-023 Lisboa, Portugal
| | - Judit Morello
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
| | - Emília C. Monteiro
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
| | - Sofia A. Pereira
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal; (M.J.C.); (A.B.P.); (F.L.-C.); (C.O.S.); (N.R.C.); (C.G.-D.); (J.S.); (J.M.); (E.C.M.)
- Correspondence:
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8
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Sheng L, Bayliss G, Zhuang S. Epidermal Growth Factor Receptor: A Potential Therapeutic Target for Diabetic Kidney Disease. Front Pharmacol 2021; 11:598910. [PMID: 33574751 PMCID: PMC7870700 DOI: 10.3389/fphar.2020.598910] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/30/2020] [Indexed: 12/11/2022] Open
Abstract
Diabetic kidney disease (DKD) is a leading cause of end-stage renal disease worldwide and the major cause of renal failure among patients on hemodialysis. Numerous studies have demonstrated that transient activation of epidermal growth factor receptor (EGFR) pathway is required for promoting kidney recovery from acute injury whereas its persistent activation is involved in the progression of various chronic kidney diseases including DKD. EGFR-mediated pathogenesis of DKD is involved in hemodynamic alteration, metabolic disturbance, inflammatory response and parenchymal cellular dysfunction. Therapeutic intervention of this receptor has been available in the oncology setting. Targeting EGFR might also hold a therapeutic potential for DKD. Here we review the functional role of EGFR in the development of DKD, mechanisms involved and the perspective about use of EGFR inhibitors as a treatment for DKD.
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Affiliation(s)
- Lili Sheng
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - George Bayliss
- Department of Medicine, Rhode Island Hospital and Alpert Medical School, Brown University, Providence, RI, United States
| | - Shougang Zhuang
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medicine, Rhode Island Hospital and Alpert Medical School, Brown University, Providence, RI, United States
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Rimke AN, Ahmed SB, Turin TC, Pendharkar SR, Raneri JK, Lynch EJ, Hanly PJ. Effect of CPAP Therapy on Kidney Function in Patients With Chronic Kidney Disease: A Pilot Randomized Controlled Trial. Chest 2020; 159:2008-2019. [PMID: 33316238 DOI: 10.1016/j.chest.2020.11.052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 11/22/2020] [Accepted: 11/25/2020] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND OSA is common in chronic kidney disease (CKD) and may accelerate a decline in kidney function. It is not clear whether treatment of OSA with CPAP improves kidney function. RESEARCH QUESTION Does treatment with CPAP improve kidney function in patients with CKD and coexisting OSA? STUDY DESIGN AND METHODS A randomized, controlled, nonblinded, parallel clinical trial was performed of patients with stages 3 and 4 CKD and coexisting OSA comparing the effect of CPAP vs usual care on the estimated glomerular filtration rate (eGFR) and the urine albumin to creatinine ratio (ACR) over 12 months. RESULTS Fifty-seven patients were enrolled and 30 were randomized to CPAP. They had moderately severe CKD (eGFR, 38.4 ± 1.5 mL/min/1.73 m2) and significant OSA and nocturnal hypoxemia (oxygen desaturation index: 23.9 events/h; interquartile range [IQR], 20.3 events/h; mean peripheral capillary oxygen saturation: 89.5%; IQR, 1.7%); 60% had baseline albuminuria (ACR, > 3 mg/mmol). No significant difference was found between CPAP and usual care in the change in eGFR and ACR over 12 months. Although some improvement in eGFR occurred with CPAP therapy in patients with a lower risk of CKD progression, this did not reach statistical significance. INTERPRETATION Although CPAP did not provide additional renal benefits over usual care in all CKD patients, some evidence suggested that CPAP slowed the decline in eGFR in CKD patients with a lower risk of CKD progression. These preliminary data support the need for larger clinical trials exploring the effects of CPAP on kidney function. TRIAL REGISTRY ClinicalTrials.gov; No.: NCT02420184; URL: www.clinicaltrials.gov.
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Affiliation(s)
- Alex N Rimke
- Sleep Centre, Foothills Medical Centre, University of Calgary, Calgary, AB, Canada; Libin Cardiovascular Institute of Alberta, Calgary, AB, Canada
| | - Sofia B Ahmed
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Libin Cardiovascular Institute of Alberta, Calgary, AB, Canada; Alberta Kidney Disease Network, Calgary, AB, Canada
| | - Tanvir C Turin
- Department of Family Medicine, University of Calgary, Calgary, AB, Canada
| | - Sachin R Pendharkar
- Sleep Centre, Foothills Medical Centre, University of Calgary, Calgary, AB, Canada; Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Jill K Raneri
- Sleep Centre, Foothills Medical Centre, University of Calgary, Calgary, AB, Canada
| | - Emma J Lynch
- Sleep Centre, Foothills Medical Centre, University of Calgary, Calgary, AB, Canada
| | - Patrick J Hanly
- Sleep Centre, Foothills Medical Centre, University of Calgary, Calgary, AB, Canada; Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
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Przybyciński J, Dziedziejko V, Puchałowicz K, Domański L, Pawlik A. Adiponectin in Chronic Kidney Disease. Int J Mol Sci 2020; 21:ijms21249375. [PMID: 33317050 PMCID: PMC7764041 DOI: 10.3390/ijms21249375] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/01/2020] [Accepted: 12/07/2020] [Indexed: 12/14/2022] Open
Abstract
Adiponectin is the adipokine associated with insulin sensitization, reducing liver gluconeogenesis, and increasing fatty acid oxidation and glucose uptake. Adiponectin is present in the kidneys, mainly in the arterial endothelium and smooth muscle cells, as well as in the capillary endothelium, and might be considered as a marker of many negative factors in chronic kidney disease. The last few years have brought a rising body of evidence that adiponectin is a multipotential protein with anti-inflammatory, metabolic, anti-atherogenic, and reactive oxygen species (ROS) protective actions. Similarly, adiponectin has shown many positive and direct actions in kidney diseases, and among many kidney cells. Data from large cross-sectional and cohort studies showed a positive correlation between serum adiponectin and mortality in chronic kidney disease. This suggests a complex interaction between local adiponectin action, comorbidities, and uremic milieu. In this review we discuss the role of adiponectin in chronic kidney disease.
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Affiliation(s)
- Jarosław Przybyciński
- Department of Nephrology, Transplantology and Internal Medicine, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland; (J.P.); (L.D.)
| | - Violetta Dziedziejko
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland; (V.D.); (K.P.)
| | - Kamila Puchałowicz
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland; (V.D.); (K.P.)
| | - Leszek Domański
- Department of Nephrology, Transplantology and Internal Medicine, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland; (J.P.); (L.D.)
| | - Andrzej Pawlik
- Department of Physiology, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 72, 70-111 Szczecin, Poland
- Correspondence: ; Tel.: +48-91-4661611
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Zheng X, Liu D. Adiponectin alleviates the symptoms of ischemic renal disease by inhibiting renal cell apoptosis. Life Sci 2020; 265:118825. [PMID: 33275989 DOI: 10.1016/j.lfs.2020.118825] [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: 08/31/2020] [Revised: 11/06/2020] [Accepted: 11/21/2020] [Indexed: 11/15/2022]
Abstract
AIMS Ischemic renal disease (IRD) can cause kidney damage and eventually lead to end-stage renal disease. Adiponectin (APN), a recently discovered collagen-like protein secreted by adipose tissues, plays an important role in regulating energy metabolism and inflammation. This study aimed to explore the specific mechanism by which APN affects IRD. MAIN METHODS We cultured human renal tubular epithelial cells (HK-2) and created a mouse model of IRD to detect apoptosis-related indicators in vitro and in vivo. KEY FINDINGS Compared with those in the control group, the apoptosis rate and expression levels of Bax and Fas increased in the CoCl2-induced hypoxia model group. However, the expression of Bcl-2 decreased, and after the combined treatment with APN, the phenomenon mentioned above was reversed. Moreover, studies have found that stanniocalcin-1 (STC-1) and uncoupling protein3 (UCP3) are also involved in the protective effect of APN. Additionally, we found that the glomeruli of the mice were significantly enlarged after the APN gene was knocked out; furthermore, the number of collagen fibers in the renal tubules, as well as the expression of the corresponding fibrogenic factors, increased significantly. More importantly, after the knockout of the APN gene, the expression of the hypoxia-inducible factors HIF-1α and HIF-1β and the apoptotic rate of renal tissue cells also increased. SIGNIFICANCE These results indicate that APN can alleviate the symptoms of IRD by inhibiting renal cell apoptosis. Thus, in the future, APN may be a new target for the treatment of IRD. CHEMICAL COMPOUNDS Cobalt chloride (PubChem CID: 24643).
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Affiliation(s)
- Xiaotong Zheng
- Department of Nephrology, Shengjing Hospital of China Medical University, NO.39 Huaxiang Road, Tiexi District, Shenyang 110022, Liaoning, PR China
| | - Dajun Liu
- Department of Nephrology, Shengjing Hospital of China Medical University, NO.39 Huaxiang Road, Tiexi District, Shenyang 110022, Liaoning, PR China.
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12
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First evidence of aryl hydrocarbon receptor as a druggable target in hypertension induced by chronic intermittent hypoxia. Pharmacol Res 2020; 159:104869. [DOI: 10.1016/j.phrs.2020.104869] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/15/2020] [Accepted: 04/24/2020] [Indexed: 02/08/2023]
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13
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AdipoRon Protects against Tubular Injury in Diabetic Nephropathy by Inhibiting Endoplasmic Reticulum Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6104375. [PMID: 32832003 PMCID: PMC7428946 DOI: 10.1155/2020/6104375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/13/2020] [Accepted: 07/20/2020] [Indexed: 12/25/2022]
Abstract
Endoplasmic reticulum (ER) stress has been reported to play a pivotal role in diabetic nephropathy (DN). AdipoRon is a newly developed adiponectin receptor agonist that provides beneficial effects for diabetic mice; however, its underlying mechanism remains to be delineated. Here, we demonstrated increased expression levels of ER stress markers, accompanied by upregulated levels of proinflammatory cytokines and increased expression of collagen I, fibronectin, Bax, and cleaved caspase 3 in the kidneys of db/db mice compared with control mice. Decreased expression of adiponectin receptor 1 (AdipoR1) and phosphorylated 5′AMP-activated kinase (p-AMPK) was also observed in the kidneys of db/db mice. However, these alterations were partially reversed by intragastric gavage with AdipoRon. In vitro, AdipoRon alleviated high-glucose-induced ER stress, oxidative stress, and apoptosis in HK-2 cells, a human tubular cell line. Moreover, AdipoRon restored the expression of AdipoR1 and p-AMPK in HK-2 cells exposed to high-glucose conditions. Additionally, these effects were partially abrogated by pretreatment with AdipoR1 siRNA, but this abrogation was ameliorated by cotreatment with AICAR, an AMPK activator. Furthermore, the effects of AdipoRon were also partially abolished by cotreatment with compound C. Together, these results suggest that AdipoRon exerts favorable effects on diabetes-induced tubular injury in DN by inhibiting ER stress mediated by the AdipoR1/p-AMPK pathway.
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Gauda EB, Conde S, Bassi M, Zoccal DB, Almeida Colombari DS, Colombari E, Despotovic N. Leptin: Master Regulator of Biological Functions that Affects Breathing. Compr Physiol 2020; 10:1047-1083. [PMID: 32941688 DOI: 10.1002/cphy.c190031] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Obesity is a global epidemic in developed countries accounting for many of the metabolic and cardiorespiratory morbidities that occur in adults. These morbidities include type 2 diabetes, sleep-disordered breathing (SDB), obstructive sleep apnea, chronic intermittent hypoxia, and hypertension. Leptin, produced by adipocytes, is a master regulator of metabolism and of many other biological functions including central and peripheral circuits that control breathing. By binding to receptors on cells and neurons in the brainstem, hypothalamus, and carotid body, leptin links energy and metabolism to breathing. In this comprehensive article, we review the central and peripheral locations of leptin's actions that affect cardiorespiratory responses during health and disease, with a particular focus on obesity, SDB, and its effects during early development. Obesity-induced hyperleptinemia is associated with centrally mediated hypoventilation with decrease CO2 sensitivity. On the other hand, hyperleptinemia augments peripheral chemoreflexes to hypoxia and induces sympathoexcitation. Thus, "leptin resistance" in obesity is relative. We delineate the circuits responsible for these divergent effects, including signaling pathways. We review the unique effects of leptin during development on organogenesis, feeding behavior, and cardiorespiratory responses, and how undernutrition and overnutrition during critical periods of development can lead to cardiorespiratory comorbidities in adulthood. We conclude with suggestions for future directions to improve our understanding of leptin dysregulation and associated clinical diseases and possible therapeutic targets. Lastly, we briefly discuss the yin and the yang, specifically the contribution of relative adiponectin deficiency in adults with hyperleptinemia to the development of metabolic and cardiovascular disease. © 2020 American Physiological Society. Compr Physiol 10:1047-1083, 2020.
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Affiliation(s)
- Estelle B Gauda
- Division of Neonatology, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Silvia Conde
- CEDOC, NOVA Medical School, Faculdade de Ciências Médicas, Lisboa, Portugal
| | - Mirian Bassi
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Daniel B Zoccal
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Debora Simoes Almeida Colombari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Eduardo Colombari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Nikola Despotovic
- Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
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Moulin S, Arnaud C, Bouyon S, Pépin JL, Godin-Ribuot D, Belaidi E. Curcumin prevents chronic intermittent hypoxia-induced myocardial injury. Ther Adv Chronic Dis 2020; 11:2040622320922104. [PMID: 32637058 PMCID: PMC7315663 DOI: 10.1177/2040622320922104] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 03/24/2020] [Indexed: 01/14/2023] Open
Abstract
Background: Chronic intermittent hypoxia (IH), the hallmark feature of obstructive sleep apnoea syndrome, contributes to infarct size enhancement after myocardial ischemia–reperfusion (I/R). Curcumin (Curc), the natural pigment of Curcuma longa, has been demonstrated to be beneficial in the context of myocardial injury. In this study, we assessed the effects of Curc on the maladaptive cardiac response to IH, and particularly on IH-induced hypoxia inducible factor-1 (HIF-1) expression, oxidative stress, inflammation, endoplasmic reticulum (ER) stress and apoptosis. Methods: Swiss/SV129 mice were exposed to normoxia or IH (21–5% FiO2, 60 s cycles, 8 h per day, for 21 days) and treated orally with Curc (100 mg kg−1
day−1, oral gavage) or its vehicle. Mice were then either euthanised for heart sampling in order to perform biochemical and histological analysis, or subjected to an in vivo ischemia-reperfusion protocol in order to measure infarct size. Results: IH increased nuclear HIF-1α expression and superoxide anion (O2.–) production as well as nuclear factor kappa B (NF-kB) p65, glucose-regulated protein (Grp78) and C/EBP homologous protein (CHOP) expression. IH also induced apoptosis and increased infarct size after I/R . The IH-induced HIF-1 activation, oxidative stress, inflammation, ER stress and apoptosis were abolished by chronic Curc treatment. Curc also significantly decreased infarct size only in mice exposed to IH. Conclusion: Curc prevents IH-induced myocardial cell death signalling. Curc might be used as a combined therapy with continuous positive airway pressure in sleep apnoea patients with high cardiovascular risk.
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Affiliation(s)
- Sophie Moulin
- Université Grenoble Alpes-HP2-Grenoble F-38042, France / INSERM, U1042-Grenoble F38042, France
| | - Claire Arnaud
- Université Grenoble Alpes-HP2-Grenoble F-38042, France / INSERM, U1042-Grenoble F38042, France
| | - Sophie Bouyon
- Université Grenoble Alpes-HP2-Grenoble F-38042, France / INSERM, U1042-Grenoble F38042, France
| | - Jean-Louis Pépin
- Université Grenoble Alpes-HP2-Grenoble F-38042, France / INSERM, U1042-Grenoble F38042, France / Centre Hospitalier Universitaire des Alpes, Grenoble F38042, France
| | - Diane Godin-Ribuot
- Université Grenoble Alpes-HP2-Grenoble F-38042, France / INSERM, U1042-Grenoble F38042, France
| | - Elise Belaidi
- University Grenoble Alpes, Grenoble, France INSERM, U1042, Grenoble, France
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He Y, Liu B, Yao P, Shao Y, Cheng Y, Zhao J, Wu J, Zhao ZW, Huang W, Christopher TA, Lopez B, Ma X, Cao Y. Adiponectin inhibits cardiac arrest/cardiopulmonary resuscitation‑induced apoptosis in brain by increasing autophagy involved in AdipoR1‑AMPK signaling. Mol Med Rep 2020; 22:870-878. [PMID: 32468051 PMCID: PMC7339636 DOI: 10.3892/mmr.2020.11181] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 04/04/2020] [Indexed: 02/05/2023] Open
Abstract
Emerging evidence suggests that both apoptosis and autophagy contribute to global cerebral ischemia‑reperfusion (GCIR)‑induced neuronal death, which results from cardiac arrest (CA). However, the mechanism of how GCIR may affect the balance between apoptosis and autophagy resulting from CA remains to be elucidated. Additionally, the role of adiponectin (APN) in reversing the apoptosis and autophagy induced by GCIR following cardiac arrest‑cardiopulmonary resuscitation (CA‑CPR) is unclear. Thus, the aim of the present study was to investigate how GCIR affect the apoptosis and autophagy in response to CA and to clarify whether APN may alter the apoptosis and autophagy of neuronal death in GCIR‑injured brain post‑CA‑CPR. Using normal controls (Sham group) and two experimental groups [CA‑CPR‑induced GCIR injury (PCAS) group and exogenous treatment with adiponectin post‑CA‑CPR (APN group)], it was demonstrated that both apoptosis and autophagy were observed simultaneously in the brain subjected to GCIR, but apoptosis appeared to be more apparent. Exogenous administration of APN significantly reduced the formation of malondialdehyde, a marker of oxidative stress and increased the expression of superoxide dismutase, an anti‑oxidative enzyme, resulting in the stimulation of autophagy, inhibition of apoptosis and reduced brain tissue injury (P<0.05 vs. PCAS). APN treatment increased the expression of APN receptor 1 (AdipR1) and the phosphorylation of AMP‑activated protein kinase (AMPK; Ser182) in brain tissues. In conclusion, GCIR induced apoptosis and inhibited autophagy, contributing to brain injury in CA‑CPR. By contrast, APN reduced the brain injury by reversing the changes of neuronal autophagy and apoptosis induced by GCIR. The possible mechanism might owe to its effects on the activation of AMPK after combining with AdipR1 on neurons, which suggests a novel intervention against GCIR injury in CA‑CPR conditions.
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Affiliation(s)
- Yarong He
- Emergency Medicine Department, West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Bofu Liu
- Emergency Medicine Department, West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Peng Yao
- Emergency Medicine Department, West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yuming Shao
- Emergency Medicine Department, West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yanwei Cheng
- Emergency Medicine Department, West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jie Zhao
- Emergency Medicine Department, West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jiang Wu
- West China Clinical Medical School, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Zhi Wei Zhao
- West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Wen Huang
- Laboratory of Ethnopharmacology, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Theodore A Christopher
- Emergency Medicine Department, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA
| | - Bernard Lopez
- Emergency Medicine Department, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA
| | - Xinliang Ma
- Emergency Medicine Department, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA
| | - Yu Cao
- Emergency Medicine Department, West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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17
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Adiponectin ameliorates lung injury induced by intermittent hypoxia through inhibition of ROS-associated pulmonary cell apoptosis. Sleep Breath 2020; 25:459-470. [PMID: 32458376 DOI: 10.1007/s11325-020-02103-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 04/23/2020] [Accepted: 05/07/2020] [Indexed: 12/21/2022]
Abstract
PURPOSE Obstructive sleep apnea hypopnea syndrome has been reported to be associated with pulmonary hypertension (PH). Adiponectin (Ad) has many protective roles in the human body, including its function as an anti-inflammatory and an anti-oxidant, as well as its role in preventing insulin resistance and atherosclerosis. This study aimed to investigate the molecular mechanism of chronic intermittent hypoxia (CIH)-induced pulmonary injury and the protective role of Ad in experimental rats. METHODS Thirty male Sprague-Dawley rats were randomly divided into three groups with 10 rats in each group: normal control (NC) group, CIH group, and CIH + Ad group. Rats in the NC group were kept breathing room air for 12 weeks. Rats in the CIH group were intermittently exposed to a hypoxic environment for 8 h/day for 12 weeks. Rats in the CIH + Ad group received 10 μg Ad twice weekly via intravenous injection. After 12 weeks of CIH exposure, we detected the pulmonary function, pulmonary artery pressure, lung histology, pulmonary cell apoptosis, pulmonary artery endothelial cell apoptosis, mitochondrial membrane potential (MMP), and reactive oxygen species (ROS) level. We also analyzed expression proteins involved in the mitochondria-, endoplasmic reticulum (ER) stress-, and Fas receptor-associated pulmonary apoptosis pathways, as well as the SIRT3/SOD2 pathway. RESULTS CIH exposure for 12 weeks did not lead to abnormal pulmonary function, PH, or pulmonary artery endothelial cell apoptosis. However, we observed a significant increase in the rate of pulmonary cell apoptosis, the expression of proteins involved in mitochondria-, ER stress-, and Fas receptor-associated pulmonary apoptosis pathways, and the generation of ROS in the CIH group compared with the NC group. In contrast, the MMP and protein expressions of SIRT3/SOD2 pathway were significantly decreased in the CIH group compared with the NC group. Ad supplementation in the CIH + Ad group partially improved these changes induced by CIH. CONCLUSION Even though CIH did not cause abnormal pulmonary function or PH, early lung injury was detected at the molecular level in rats exposed to CIH. Treatment with Ad ameliorated the pulmonary injury by activating the SIRT3/SOD2 pathway, reducing ROS generation, and inhibiting ROS-associated lung cell apoptosis.
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18
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Obstructive sleep apnoea and cardiovascular consequences: Pathophysiological mechanisms. Arch Cardiovasc Dis 2020; 113:350-358. [DOI: 10.1016/j.acvd.2020.01.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 01/10/2020] [Accepted: 01/15/2020] [Indexed: 12/11/2022]
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Shi W, Guo Z, Ji Y, Feng J. The protective effect of recombinant globular adiponectin on testis by modulating autophagy, endoplasmic reticulum stress and oxidative stress in streptozotocin-induced diabetic mice. Eur J Pharmacol 2020; 879:173132. [PMID: 32353359 DOI: 10.1016/j.ejphar.2020.173132] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 02/07/2023]
Abstract
This study was to investigate whether recombinant globular adiponectin produced its protective effect on the testis of diabetic mice by modulating autophagy, endoplasmic reticulum stress and oxidative stress. Male mice were randomly divided into control, diabetic, diabetic treated with low and high dose of adiponectin. Mice were killed at the termination after 4 weeks and 8 weeks of adiponectin treatment. Serum levels of glucose, lipids, testosterone, insulin, LH and FSH were measured. The protein expression of glucose-regulated protein 78 (GRP78), C/EBP homologous protein (CHOP), Caspase12, Beclin1, microtubule-associated protein light chain 3 (LC3) and p62 was determined by western blotting. The mRNA expression of adiponectin receptor 1 (AdipoR1), p22phox, p47phox, nuclear factor erythroid2-related factor 2 (Nrf2), NAD(P)H-quinone oxidoreductase 1(NQO1), heme oxygenase-1 (HO-1) and superoxide dismutase (SOD) were determined by real-time fluorescence quantitative PCR. The testicular weight, the sperm number and motility, and the serum levels of testosterone and insulin were significantly decreased in diabetic mice (P < 0.05). The expression of Beclin1, LC3, Nrf2, NQO1, HO-1, SOD and AdipoR1 were significantly decreased (P < 0.05), while the expression of GRP78, CHOP, Caspase12, p62, p22phox and p47phox were notably increased in the testes of diabetic mice (P < 0.05). Adiponectin treatment significantly reversed the above-mentioned changes in the testes of diabetic mice, some of which were dose- and time-dependent (P < 0.05). These data suggested that recombinant globular adiponectin may produce the protective effect on the testes of diabetic mice by inducing autophagy and inhibiting ER stress and oxidative stress.
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Affiliation(s)
- Wenjiao Shi
- Department of Endocrinology, Second Hospital, Shanxi Medical University, Taiyuan, 030001, China; Department of Anesthesiology, Xinhua Hospital, Shanghai Jiaotong University, Shanghai, 200092, China
| | - Zhixin Guo
- Department of Endocrinology, Second Hospital, Shanxi Medical University, Taiyuan, 030001, China.
| | - Yun Ji
- Department of Anesthesiology, Xinhua Hospital, Shanghai Jiaotong University, Shanghai, 200092, China
| | - Jingyi Feng
- Department of Endocrinology, Second Hospital, Shanxi Medical University, Taiyuan, 030001, China
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Moulin S, Thomas A, Arnaud C, Arzt M, Wagner S, Maier LS, Pépin JL, Godin-Ribuot D, Gaucher J, Belaidi E. Cooperation Between Hypoxia-Inducible Factor 1α and Activating Transcription Factor 4 in Sleep Apnea-Mediated Myocardial Injury. Can J Cardiol 2020; 36:936-940. [PMID: 32387037 DOI: 10.1016/j.cjca.2020.04.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 04/01/2020] [Accepted: 04/01/2020] [Indexed: 01/21/2023] Open
Abstract
Chronic intermittent hypoxia (CIH) occurring during sleep apnea amplifies infarct size owing to ischemia-reperfusion. CIH activates hypoxia-inducible factor 1 (HIF-1) and activating transcription factor 4 (ATF4). However, whether HIF-1 and ATF4 interact to promote cardiomyocyte death remains unexplored. For the first time, we observed that in myocardium from apneic patients, CCAAT enhancer-binding protein homologous protein (CHOP) expression is increased and HIF-1α expression is correlated with sleep apnea severity. In mice, single-allele deletion of HIF-1α prevents CIH increase in CHOP expression and infarct size. We uncovered a physical interaction between HIF-1α and ATF4 in CIH that may represent a novel cardiomyocyte death complex.
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Affiliation(s)
- Sophie Moulin
- Laboratoire HP2, Institut National de la Santé et de la Recherche Médicale, Université Grenoble Alpes, Grenoble, France; Institut National de la Santé et de la Recherche Médicale U1042, Grenoble, France
| | - Amandine Thomas
- Laboratoire HP2, Institut National de la Santé et de la Recherche Médicale, Université Grenoble Alpes, Grenoble, France; Institut National de la Santé et de la Recherche Médicale U1042, Grenoble, France
| | - Claire Arnaud
- Laboratoire HP2, Institut National de la Santé et de la Recherche Médicale, Université Grenoble Alpes, Grenoble, France; Institut National de la Santé et de la Recherche Médicale U1042, Grenoble, France
| | - Michael Arzt
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Stefan Wagner
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Lars S Maier
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Jean-Louis Pépin
- Laboratoire HP2, Institut National de la Santé et de la Recherche Médicale, Université Grenoble Alpes, Grenoble, France; Institut National de la Santé et de la Recherche Médicale U1042, Grenoble, France; Centre Hospitalier Universitaire des Alpes, Grenoble, France
| | - Diane Godin-Ribuot
- Laboratoire HP2, Institut National de la Santé et de la Recherche Médicale, Université Grenoble Alpes, Grenoble, France; Institut National de la Santé et de la Recherche Médicale U1042, Grenoble, France
| | - Jonathan Gaucher
- Laboratoire HP2, Institut National de la Santé et de la Recherche Médicale, Université Grenoble Alpes, Grenoble, France; Institut National de la Santé et de la Recherche Médicale U1042, Grenoble, France
| | - Elise Belaidi
- Laboratoire HP2, Institut National de la Santé et de la Recherche Médicale, Université Grenoble Alpes, Grenoble, France; Institut National de la Santé et de la Recherche Médicale U1042, Grenoble, France.
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Jing H, Tang S, Lin S, Liao M, Chen H, Fan Y, Zhou J. Adiponectin in renal fibrosis. Aging (Albany NY) 2020; 12:4660-4672. [PMID: 32065783 PMCID: PMC7093169 DOI: 10.18632/aging.102811] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 01/25/2020] [Indexed: 04/11/2023]
Abstract
Renal fibrosis is an inevitable consequence of parenchymal scarring and is the common final pathway that mediates almost all progressive renal diseases. Adiponectin, a hormone produced by adipose tissue, possesses potent anti-insulin, anti-inflammatory, and anti-fibrotic properties. Reportedly, adiponectin serves as an important messenger that facilitates complex interactions between adipose tissue and other metabolically related organs. In recent years, a growing body of evidence supports adiponectin involvement in renal fibrosis. These studies provide a deeper understanding of the molecular mechanism of action of adiponectin in renal fibrosis and also offer a potential preventive and therapeutic target for renal fibrosis. In this review, the physiological role of adiponectin is briefly introduced, and then the mechanism of adiponectin-mediated renal fibrosis and the related signaling pathways are described. Finally, we summarize the findings regarding the clinical value of adiponectin in renal fibrotic diseases and prospected its application potential.
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Affiliation(s)
- Huan Jing
- The Third Affiliated Hospital of Southern Medical University, Zunyi Medical University, Guangzhou, Guangdong Province, China
| | - Simin Tang
- The Third Affiliated Hospital of Southern Medical University, Zunyi Medical University, Guangzhou, Guangdong Province, China
| | - Sen Lin
- The First People’s Hospital of Foshan, Foshan, Guangdong Province, China
| | - Meijuan Liao
- The First People’s Hospital of Foshan, Foshan, Guangdong Province, China
| | - Hongtao Chen
- Guangzhou Eighth People's Hospital, Guangzhou, Guangdong Province, China
| | - Youling Fan
- Panyu Central Hospital, Panyu, Guangzhou, Guangdong Province, China
| | - Jun Zhou
- The Third Affiliated Hospital of Southern Medical University, Zunyi Medical University, Guangzhou, Guangdong Province, China
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AlMarabeh S, Abdulla MH, O'Halloran KD. Is Aberrant Reno-Renal Reflex Control of Blood Pressure a Contributor to Chronic Intermittent Hypoxia-Induced Hypertension? Front Physiol 2019; 10:465. [PMID: 31105584 PMCID: PMC6491928 DOI: 10.3389/fphys.2019.00465] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 04/04/2019] [Indexed: 12/16/2022] Open
Abstract
Renal sensory nerves are important in the regulation of body fluid and electrolyte homeostasis, and blood pressure. Activation of renal mechanoreceptor afferents triggers a negative feedback reno-renal reflex that leads to the inhibition of sympathetic nervous outflow. Conversely, activation of renal chemoreceptor afferents elicits reflex sympathoexcitation. Dysregulation of reno-renal reflexes by suppression of the inhibitory reflex and/or activation of the excitatory reflex impairs blood pressure control, predisposing to hypertension. Obstructive sleep apnoea syndrome (OSAS) is causally related to hypertension. Renal denervation in patients with OSAS or in experimental models of chronic intermittent hypoxia (CIH), a cardinal feature of OSAS due to recurrent apnoeas (pauses in breathing), results in a decrease in circulating norepinephrine levels and attenuation of hypertension. The mechanism of the beneficial effect of renal denervation on blood pressure control in models of CIH and OSAS is not fully understood, since renal denervation interrupts renal afferent signaling to the brain and sympathetic efferent signals to the kidneys. Herein, we consider the currently proposed mechanisms involved in the development of hypertension in CIH disease models with a focus on oxidative and inflammatory mediators in the kidneys and their potential influence on renal afferent control of blood pressure, with wider consideration of the evidence available from a variety of hypertension models. We draw focus to the potential contribution of aberrant renal afferent signaling in the development, maintenance and progression of high blood pressure, which may have relevance to CIH-induced hypertension.
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Affiliation(s)
- Sara AlMarabeh
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
| | - Mohammed H Abdulla
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
| | - Ken D O'Halloran
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
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Guan P, Sun ZM, Luo LF, Zhou J, Yang S, Zhao YS, Yu FY, An JR, Wang N, Ji ES. Hydrogen protects against chronic intermittent hypoxia induced renal dysfunction by promoting autophagy and alleviating apoptosis. Life Sci 2019; 225:46-54. [PMID: 30951745 DOI: 10.1016/j.lfs.2019.04.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/18/2019] [Accepted: 04/01/2019] [Indexed: 12/23/2022]
Abstract
AIMS Hydrogen gas (H2) has a diversity of effects such as anti-apoptotic, anti-inflammatory and anti-oxidative properties. However, molecular mechanism underlying the potential effect of H2 on chronic intermittent hypoxia (CIH) induced renal injury remains obscure. MATERIALS AND METHODS In the present study, adult male Sprague-Dawley rats were randomly allocated into four groups: control (CON) group, CIH group, CIH with H2 treatment (CIH + H2) group, and control with H2 treatment (CON + H2) group. Oxidative stress, autophagy and endoplasmic reticulum (ER) stress were detected to determine how H2 affected the renal function of CIH exposed rats. KEY FINDINGS We demonstrated that rats who inhale hydrogen gas showed improved renal function, alleviated pathological damage, oxidative stress and apoptosis in CIH rats. Meanwhile, CIH-induced endoplasmic reticulum stress was decreased by H2 as the expressions of CHOP, caspase-12, and GRP78 were down-regulated. Furthermore, relative higher levels of LC3-II/I ratio and Beclin-1, with decreased expression of p62, were found after H2 administrated. Inhibition of mTOR may be involved in the upregulation of autophagy by H2. Finally, increased phosphorylation of p38 and JNK was involved in the CIH-induced pathological process. H2 could inhibit the activation of p38 and JNK, suggesting H2 played an active part in resisting renal injury via MAPK. SIGNIFICANCE Taken together, our study reveals that H2 can ameliorate CIH-induced kidney injury by decreasing endoplasmic reticulum stress and activating autophagy through inhibiting oxidative stress-dependent p38 and JNK MAPK activation.
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Affiliation(s)
- Peng Guan
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - Zhi-Min Sun
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - Li-Fei Luo
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - Jian Zhou
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - Shengchang Yang
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - Ya-Shuo Zhao
- Scientific Research Center, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - Fu-Yang Yu
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - Ji-Ren An
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - Na Wang
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China
| | - En-Sheng Ji
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, PR China.
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Zhang X, Rui L, Lv B, Chen F, Cai L. Adiponectin Relieves Human Adult Cardiac Myocytes Injury Induced by Intermittent Hypoxia. Med Sci Monit 2019; 25:786-793. [PMID: 30685768 PMCID: PMC6360873 DOI: 10.12659/msm.912349] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background Obstructive sleep apnea (OSA) is associated with many cardiovascular disorders. Intermittent hypoxia (IH) is a key pathological hallmark of OSA. This study was conducted to evaluate the potential therapeutic effects and the associated mechanisms of adiponectin (APN) on IH induced human adult cardiac myocytes (HACMs) injury. Material/Methods HACMs were exposed to normoxia or IH (1% to 21% O2) using a novel cell culture bio-reactor with gas-permeable membranes. Cell viability was detected by Cell Counting Kit-8 assay. Cell membrane integrity was assessed by the detection of lactate dehydrogenase (LDH) release. Cell apoptosis was analyzed by flow cytometry. Malondialdehyde (MDA), superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px) levels were determined using specific assay kits. P-AMPK (AMP-activated protein kinase), p-LKB1, and p-p65 protein levels were measured by western blotting. Pro-inflammatory factors including interleukin (IL)-1β, IL-6, IL-8 expressions were detected by enzyme-linked immunosorbent assay and quantitative real-time polymerase chain reaction. Results The results showed that APN had no cytotoxic to HACMs. Compared with the control group, HACMs cell viability significantly decreased, LDH release increased and cell apoptosis increased in the IH group. The levels of IL-1β, IL-6, IL-8, MDA, and p-p65 were higher, while the levels of SOD, GSH-Px, p-AMPK, and p-LKB1 were lower in HACMs cells in the IH group than that in the control group. However, APN treatment significantly rescued these effects compared with the IH group in a dose-dependent manner. Conclusions In conclusion, these results indicated that APN protected against IH induced HACMs injury possibly mediated by AMPK and NF-κB pathway.
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Affiliation(s)
- Xiaofeng Zhang
- Department of Respiratory Medicine, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China (mainland)
| | - Lijun Rui
- Department of Respiratory Medicine, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China (mainland)
| | - Beili Lv
- Department of Respiratory Medicine, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China (mainland)
| | - Fangfang Chen
- Department of Respiratory Medicine, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China (mainland)
| | - Liming Cai
- Department of Respiratory Medicine, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China (mainland)
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Huang Z, Liu Y, Huang X. Formononetin may protect aged hearts from ischemia/reperfusion damage by enhancing autophagic degradation. Mol Med Rep 2018; 18:4821-4830. [PMID: 30320398 PMCID: PMC6236296 DOI: 10.3892/mmr.2018.9544] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 05/01/2018] [Indexed: 01/18/2023] Open
Abstract
Myocardial infarction is a leading cause of mortality worldwide, and timely blood/oxygen reperfusion may substantially improve the outcome of infarction. However, ischemia/reperfusion (I/R) may cause severe side effects through excess reactive oxygen species generation. To develop novel methods to relieve I/R induced cell damage, the present study used a component of traditional Chinese medicine. In the present study, isolated heart tissue from aged mice and H9C2 cells with chemically‑induced aging were used as experimental subjects, and it was demonstrated that formononetin was able to alleviate I/R‑induced cell or tissue apoptosis. By applying formononetin to I/R‑damaged tissue or cells, it was demonstrated that formononetin was able to enhance autophagy and thus alleviate I/R‑induced cell damage. Furthermore, it was observed that I/R was able to inhibit lysosomal degradation processes in aged tissues or cells by impairing the lysosome acidification level, and formononetin was able to reverse this process via the re‑acidification of lysosomes. In conclusion, the present study demonstrated that formononetin was able to alleviate I/R‑induced cellular apoptosis in aged cells by facilitating autophagy.
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Affiliation(s)
- Zhengxin Huang
- Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Yingfeng Liu
- Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Xianping Huang
- Laboratory of Biochemistry, Hunan University of Chinese Medicine, Changsha, Hunan 410000, P.R. China
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Xin L, Fan W, Tingting D, Zuoming S, Qiang Z. 4-phenylbutyric acid attenuates endoplasmic reticulum stress-mediated apoptosis and protects the hepatocytes from intermittent hypoxia-induced injury. Sleep Breath 2018; 23:711-717. [PMID: 30324548 DOI: 10.1007/s11325-018-1739-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 09/27/2018] [Accepted: 10/08/2018] [Indexed: 12/15/2022]
Abstract
PURPOSE To investigate the effect of 4-phenylbutyric acid (4-PBA) on intermittent hypoxia (IH)-induced liver cell injury and to clarify the underlying mechanisms. METHODS L02 cells (normal human liver cells) were cultured in normoxic condition or subjected to intermittent hypoxia for 4, 8, and 12 h. A part of hypoxia-treated L02 cells was applied with 4-PBA 1 h before exposure to hypoxia. The effect of 4-PBA on liver injury, hepatocyte apoptosis, endoplasmic reticulum stress (ERS), and PERK-eIFa2-ATF4-CHOP apoptotic pathway was investigated. RESULTS (1) IH caused apoptosis in hepatocyte; (2) IH caused ERS in hepatocyte; (3) IH caused hepatic injury; (4) 4-PBA attenuated IH-induced liver cell injury; (5) 4-PBA protected liver cell from IH-induced apoptosis; (6) 4-PBA suppressed ERS-related apoptotic pathway (PERK-eIFa2-ATF4-CHOP), but did not suppress IH-induced unfold protein reaction (UPR). CONCLUSIONS 4-PBA could protect liver cells by suppressing IH-induced apoptosis mediated by ERS, but not by reducing the UPR.
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Affiliation(s)
- Liu Xin
- Geriatrics, Institute of Gerontology of Tianjin, Tianjin Medical University General Hospital, No.154, Anshan Road, Heping District, Tianjin, China
| | - Wu Fan
- Geriatrics, Institute of Gerontology of Tianjin, Tianjin Medical University General Hospital, No.154, Anshan Road, Heping District, Tianjin, China
| | - Du Tingting
- Geriatrics, Institute of Gerontology of Tianjin, Tianjin Medical University General Hospital, No.154, Anshan Road, Heping District, Tianjin, China
| | - Sun Zuoming
- Beckman Research Institute of the City of Hope, Duarte, CA, USA
| | - Zhang Qiang
- Geriatrics, Institute of Gerontology of Tianjin, Tianjin Medical University General Hospital, No.154, Anshan Road, Heping District, Tianjin, China.
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Li Z, Li Y, Overstreet JM, Chung S, Niu A, Fan X, Wang S, Wang Y, Zhang MZ, Harris RC. Inhibition of Epidermal Growth Factor Receptor Activation Is Associated With Improved Diabetic Nephropathy and Insulin Resistance in Type 2 Diabetes. Diabetes 2018; 67:1847-1857. [PMID: 29959129 PMCID: PMC6110321 DOI: 10.2337/db17-1513] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 06/18/2018] [Indexed: 12/18/2022]
Abstract
Previous studies by us and others have indicated that renal epidermal growth factor receptors (EGFR) are activated in models of diabetic nephropathy (DN) and that inhibition of EGFR activity protects against progressive DN in type 1 diabetes. In this study we examined whether inhibition of EGFR activation would affect the development of DN in a mouse model of accelerated type 2 diabetes (BKS db/db with endothelial nitric oxide knockout [eNOS-/-db/db]). eNOS-/-db/db mice received vehicle or erlotinib, an inhibitor of EGFR tyrosine kinase activity, beginning at 8 weeks of age and were sacrificed at 20 weeks of age. In addition, genetic models inhibiting EGFR activity (waved 2) and transforming growth factor-α (waved 1) were studied in this model of DN in type 2 diabetes. Compared with vehicle-treated mice, erlotinib-treated animals had less albuminuria and glomerulosclerosis, less podocyte loss, and smaller amounts of renal profibrotic and fibrotic components. Erlotinib treatment decreased renal oxidative stress, macrophage and T-lymphocyte infiltration, and the production of proinflammatory cytokines. Erlotinib treatment also preserved pancreas function, and these mice had higher blood insulin levels at 20 weeks, decreased basal blood glucose levels, increased glucose tolerance and insulin sensitivity, and increased blood levels of adiponectin compared with vehicle-treated mice. Similar to the aforementioned results, both waved 1 and waved 2 diabetic mice also had attenuated DN, preserved pancreas function, and decreased basal blood glucose levels. In this mouse model of accelerated DN, inhibition of EGFR signaling led to increased longevity.
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Affiliation(s)
- Zhilian Li
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong, China
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
| | - Yan Li
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jessica M Overstreet
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
| | - Sungjin Chung
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
| | - Aolei Niu
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
| | - Xiaofeng Fan
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
| | - Suwan Wang
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
| | - Yinqiu Wang
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
| | - Ming-Zhi Zhang
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
| | - Raymond C Harris
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, TN
- Department of Veterans Affairs, Nashville, TN
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Zhang Y, Su X, Zou F, Xu T, Pan P, Hu C. Toll-like receptor-4 deficiency alleviates chronic intermittent hypoxia-induced renal injury, inflammation, and fibrosis. Sleep Breath 2018; 23:503-513. [PMID: 30099700 DOI: 10.1007/s11325-018-1704-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/16/2018] [Accepted: 07/30/2018] [Indexed: 02/03/2023]
Abstract
BACKGROUND Obstructive sleep apnea (OSA)-associated chronic kidney disease is mainly caused by chronic intermittent hypoxia (CIH) triggered renal damage. This study aims to investigate the role of toll-like receptor-4 (TLR4) in underlying mechanism involved chronic intermittent hypoxia (CIH)-induced renal damage. METHODS C57BL/6J mice with normal TLR4 (TLR4 WT) or deficient TLR4 (TLR4 KO) were divided into four groups and exposed to normal air (NA) and CIH: TLR4 WT + NA, TLR4 KO + NA, TLR4 WT + CIH, and TLR4 KO + CIH. CIH lasted for 8 h/day and 7 days/week for 6 weeks. Renal injury and inflammation were evaluated by histology and ELISA. Renal tubular apoptosis, macrophages, and fibroblasts recruitment were determined by TUNEL assay, immunofluorescence, and western blot. RESULTS In response to CIH, TLR4 deficiency alleviated renal histological injury, renal dysfunction, and fibrosis. TLR4 deficiency ameliorated renal dysfunction (serum BUN and creatinine) and tubular endothelial apoptosis determined by immunofluorescence staining of CD31 and TUNEL, and western blot of apoptotic protein (caspase-3, c-caspase-3, and Bax/Bcl-2 ratio). Furthermore, we also found TLR4 deficiency abrogated CIH-induced macrophages (CD68) and fibroblasts (α-SMA) recruitment, further reducing expression of extra-cellular matrix protein (collagen I and collagen IV) and inflammatory cytokines release (IL-6, TNF-α, and MCP-1). Finally, we used immunohistochemistry to demonstrate that TLR4 deficiency attenuated increased expression of MyD88 and NF-kB p65 after CIH treatment. CONCLUSIONS Our data suggest that TLR4 plays a vital role in CIH-induced renal injury, inflammation and fibrosis, and inhibition of TLR4 probably provides a therapeutic potential for CIH-induced kidney damage.
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Affiliation(s)
- Yan Zhang
- Department of Respiratory Medicine, Xiangya Hospital, Key Cite of National Clinical Research Center for Respiratory Disease, Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Xiaoli Su
- Department of Respiratory Medicine, Xiangya Hospital, Key Cite of National Clinical Research Center for Respiratory Disease, Central South University, Changsha, 410008, Hunan, People's Republic of China.
| | - Fangfang Zou
- Department of Respiratory Medicine, Xiangya Hospital, Key Cite of National Clinical Research Center for Respiratory Disease, Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Tengjuan Xu
- Department of Respiratory Medicine, Xiangya Hospital, Key Cite of National Clinical Research Center for Respiratory Disease, Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Pinhua Pan
- Department of Respiratory Medicine, Xiangya Hospital, Key Cite of National Clinical Research Center for Respiratory Disease, Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Chengping Hu
- Department of Respiratory Medicine, Xiangya Hospital, Key Cite of National Clinical Research Center for Respiratory Disease, Central South University, Changsha, 410008, Hunan, People's Republic of China
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Poonit ND, Cai XH. The relation and mechanism of kidney injury in obstructive sleep apnea: a literature review. Sleep Biol Rhythms 2018. [DOI: 10.1007/s41105-018-0146-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Poonit ND, Zhang YC, Ye CY, Cai HL, Yu CY, Li T, Cai XH. Chronic intermittent hypoxia exposure induces kidney injury in growing rats. Sleep Breath 2017; 22:453-461. [PMID: 29124628 DOI: 10.1007/s11325-017-1587-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 09/21/2017] [Accepted: 10/20/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The objectives of this paper are to examine the effect of chronic intermittent hypoxia (CIH) on the morphological changes in the kidney of growing rats and to explore the mechanisms underlying the CIH-induced renal damage. METHODS Forty Sprague-Dawley rats were randomly divided into two groups: 2 and 4 weeks CIH groups (2IH, 4IH), and in the control group 2 and 4 weeks air-stimulated groups (2C, 4C), with 10 rats in each group. Pathological changes of renal tissue were observed by HE staining, PAS staining, and Masson staining. Real-time PCR method was used to detect the mRNA expression of HIF-1α, CuZnSOD/ZnSOD, and MnSOD in renal tissue. RESULTS (1) Intermittent hypoxia (IH) caused morphological damage in the kidney. Hypertrophy of epithelial cells in the kidney tubules and dilation in the glomeruli were observed under light microscope in HE and PAS stain, especially in 4IH group. Masson staining showed no significant fibrotic response in the IH groups. (2) Compared with the corresponding control groups, the levels of serum SOD were significantly lower in CIH groups, and especially in 4IH group. The mRNA expression of Cu/ZnSOD and MnSOD in CIH groups decreased significantly as compared to control groups. The mRNA levels of HIF-1α in the kidney were significantly higher in CIH groups than those in the corresponding control groups. CONCLUSION Oxidative stress played a critical role in renal damage by up-regulating HIF-1α transcription and down-regulating Cu/ZnSOD and MnSOD transcription after chronic intermittent hypoxia exposure in growing rats.
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Affiliation(s)
- Neha-Devi Poonit
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan Western Road, Wenzhou, Zhejiang, 325027, People's Republic of China
| | - Yi-Chun Zhang
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan Western Road, Wenzhou, Zhejiang, 325027, People's Republic of China
| | - Chu-Yuan Ye
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan Western Road, Wenzhou, Zhejiang, 325027, People's Republic of China
| | - Hui-Lin Cai
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan Western Road, Wenzhou, Zhejiang, 325027, People's Republic of China
| | - Chen-Yi Yu
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan Western Road, Wenzhou, Zhejiang, 325027, People's Republic of China
| | - Ting Li
- The Children's Hospital, Zhejiang University School Of Medicine, Hangzhou, 310000, China
| | - Xiao-Hong Cai
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan Western Road, Wenzhou, Zhejiang, 325027, People's Republic of China. .,Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325027, China.
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31
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Hou Y, Yang H, Cui Z, Tai X, Chu Y, Guo X. Tauroursodeoxycholic acid attenuates endoplasmic reticulum stress and protects the liver from chronic intermittent hypoxia induced injury. Exp Ther Med 2017; 14:2461-2468. [PMID: 28962181 PMCID: PMC5609300 DOI: 10.3892/etm.2017.4804] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 03/10/2017] [Indexed: 01/14/2023] Open
Abstract
Obstructive sleep apnea that characterized by chronic intermittent hypoxia (CIH) has been reported to associate with chronic liver injury. Tauroursodeoxycholic acid (TUDCA) exerts liver-protective effects in various liver diseases. The purpose of this study was to test the hypothesis that TUDCA could protect liver against CIH injury. C57BL/6 mice were subjected to intermittent hypoxia for eight weeks and applied with TUDCA by intraperitoneal injection. The effect of TUDCA on liver histological changes, liver function, oxidative stress, inflammatory response, hepatocyte apoptosis and endoplasmic reticulum (ER) stress were investigated. The results showed that administration of TUDCA attenuated liver pathological changes, reduced serum alanine aminotransferase and aspartate aminotransferase level, suppressed reactive oxygen species activity, decreased tumor necrosis factor-α and interleukin-1β level and inhibited hepatocyte apoptosis induced by CIH. TUDCA also inhibited CIH-induced ER stress in liver as evidenced by decreased expression of ER chaperone 78 kDa glucose-related protein, unfolded protein response transducers and ER proapoptotic proteins. Altogether, the present study described a liver-protective effect of TUDCA in CIH mice model, and this effect seems at least partly through the inhibition of ER stress.
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Affiliation(s)
- Yanpeng Hou
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China.,Department of Otolaryngology, The 463rd Hospital of The Chinese People's Liberation Army, Shenyang, Liaoning 110042, P.R. China
| | - Huai'an Yang
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Zeshi Cui
- Science Experiment Center of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Xuhui Tai
- Department of Otolaryngology, The 463rd Hospital of The Chinese People's Liberation Army, Shenyang, Liaoning 110042, P.R. China
| | - Yanling Chu
- Department of Otolaryngology, The 463rd Hospital of The Chinese People's Liberation Army, Shenyang, Liaoning 110042, P.R. China
| | - Xing Guo
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
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Lim W, Choi MJ, Bae H, Bazer FW, Song G. A critical role for adiponectin-mediated development of endometrial luminal epithelial cells during the peri-implantation period of pregnancy. J Cell Physiol 2017; 232:3146-3157. [PMID: 28063235 DOI: 10.1002/jcp.25768] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Accepted: 01/05/2017] [Indexed: 11/11/2022]
Abstract
Adiponectin is one of the adipokines in the collagen superfamily. It is secreted primarily by white adipocytes and influences reproductive processes including ovarian and uterine functions. Adiponectin regulates energy homeostasis, insulin sensitivity, and is anti-inflammatory in various tissues. Its receptors (ADIPOR1 and ADIPOR2) are widely expressed in mammalian tissues, including porcine conceptuses and endometrial during the estrous cycle and peri-implantation period of pregnancy. However, regulatory effects of adiponectin on endometrial epithelial cells are unknown. Therefore, we investigated the effects of parity on expression of ADIPOR1 and ADIPOR2 and the effects of adiponectin in the porcine endometrium during early pregnancy. Results of this study revealed robust expression of ADIPOR1 and ADIPOR2 in uterine luminal (LE) and glandular (GE) epithelia during early pregnancy and expression decreased as with increasing parity. For porcine luminal epithelial (pLE) cells, adiponectin enhanced proliferation, and increased phosphorylation of AKT, P70S6K, S6, ERK1/2, JNK, P38, and P90RSK in a time-dependent manner. Moreover, the abundance of adiponectin-activated signaling molecules were suppressed by pharmacological inhibitors including wortmannin, U0126, SP600125, and SB203580, respectively, in pLE cells. Furthermore, inhibition of each targeted signal transduction molecule influenced proliferation of adiponectin-stimulated pLE cells. In addition, adiponectin inhibited tunicamycin-induced endoplasmic reticulum (ER)-stress through effects on ER stress regulated proteins in pLE cells. Collectively, these results suggest that adiponectin affects development of porcine uterine epithelia and reproductive performance through modulation of PI3K/AKT and MAPK cell signaling pathways.
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Affiliation(s)
- Whasun Lim
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea.,Department of Biomedical Sciences, Catholic Kwandong University, Gangneung, Republic of Korea
| | - Myung Jin Choi
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Hyocheol Bae
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Fuller W Bazer
- Center for Animal Biotechnology and Genomics and Department of Animal Science, Texas A&M University, College Station, Texas
| | - Gwonhwa Song
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
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33
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Liu M, Ning X, Li R, Yang Z, Yang X, Sun S, Qian Q. Signalling pathways involved in hypoxia-induced renal fibrosis. J Cell Mol Med 2017; 21:1248-1259. [PMID: 28097825 PMCID: PMC5487923 DOI: 10.1111/jcmm.13060] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Accepted: 11/18/2016] [Indexed: 12/23/2022] Open
Abstract
Renal fibrosis is the common pathological hallmark of progressive chronic kidney disease (CKD) with diverse aetiologies. Recent researches have highlighted the critical role of hypoxia during the development of renal fibrosis as a final common pathway in end‐stage kidney disease (ESKD), which joints the scientist's attention recently to exploit the molecular mechanism underlying hypoxia‐induced renal fibrogenesis. The scaring formation is a multilayered cellular response and involves the regulation of multiple hypoxia‐inducible signalling pathways and complex interactive networks. Therefore, this review will focus on the signalling pathways involved in hypoxia‐induced pathogenesis of interstitial fibrosis, including pathways mediated by HIF, TGF‐β, Notch, PKC/ERK, PI3K/Akt, NF‐κB, Ang II/ROS and microRNAs. Roles of molecules such as IL‐6, IL‐18, KIM‐1 and ADO are also reviewed. A comprehensive understanding of the roles that these hypoxia‐responsive signalling pathways and molecules play in the context of renal fibrosis will provide a foundation towards revealing the underlying mechanisms of progression of CKD and identifying novel therapeutic targets. In the future, promising new effective therapy against hypoxic effects may be successfully translated into the clinic to alleviate renal fibrosis and inhibit the progression of CKD.
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Affiliation(s)
- Minna Liu
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.,State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaoxuan Ning
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Rong Li
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Zhen Yang
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.,State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaoxia Yang
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.,State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Shiren Sun
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Qi Qian
- Department of Medicine, Division of Nephrology and hypertension, Mayo Clinic College of Medicine, Mayo Graduate School, Rochester, MN, USA
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34
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Lu W, Kang J, Hu K, Tang S, Zhou X, Yu S, Xu L. Angiotensin-(1-7) relieved renal injury induced by chronic intermittent hypoxia in rats by reducing inflammation, oxidative stress and fibrosis. ACTA ACUST UNITED AC 2017; 50:e5594. [PMID: 28076452 PMCID: PMC5264539 DOI: 10.1590/1414-431x20165594] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 10/25/2016] [Indexed: 11/25/2022]
Abstract
We aimed to study the renal injury and hypertension induced by chronic intermittent
hypoxia (CIH) and the protective effects mediated by angiotensin 1-7 [Ang(1-7)]. We
randomly assigned 32 male Sprague-Dawley rats (body weight 180-200 g) to normoxia
control, CIH, Ang(1-7)-treated normoxia, and Ang(1-7)-treated CIH groups. Systolic
blood pressure (SBP) was monitored at the start and end of each week. Renal
sympathetic nerve activity (RSNA) was recorded. CTGF and TGF-β were detected by
immunohistochemistry and western blotting. Tissue parameters of oxidative stress were
also determined. In addition, renal levels of interleukin-6, tumor necrosis factor-α,
nitrotyrosine, and hypoxia-inducible factor-1α were determined by
immunohistochemistry, immunoblotting, and ELISA. TUNEL assay results and cleaved
caspase 3 and 12 were also determined. Ang(1-7) induced a reduction in SBP together
with a restoration of RSNA in the rat model of CIH. Ang(1-7) treatment also
suppressed the production of reactive oxygen species, reduced renal tissue
inflammation, ameliorated mesangial expansion, and decreased renal fibrosis. Thus,
Ang(1-7) treatment exerted renoprotective effects on CIH-induced renal injury and was
associated with a reduction of oxidative stress, inflammation and fibrosis. Ang(1-7)
might therefore represent a promising therapy for obstructive sleep apnea-related
hypertension and renal injury.
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Affiliation(s)
- W Lu
- Division of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - J Kang
- Division of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - K Hu
- Division of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - S Tang
- Division of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - X Zhou
- Division of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - S Yu
- Division of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - L Xu
- Division of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan, China
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