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Sorensen CM, Salomonsson M, Lubberding AF, Holstein‐Rathlou N. The renal vasodilatation from β-adrenergic activation in vivo in rats is not driven by K V7 and BK Ca channels. Exp Physiol 2024; 109:791-803. [PMID: 38460127 PMCID: PMC11061631 DOI: 10.1113/ep091618] [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: 10/30/2023] [Accepted: 02/21/2024] [Indexed: 03/11/2024]
Abstract
The mechanisms behind renal vasodilatation elicited by stimulation of β-adrenergic receptors are not clarified. As several classes of K channels are potentially activated, we tested the hypothesis that KV7 and BKCa channels contribute to the decreased renal vascular tone in vivo and in vitro. Changes in renal blood flow (RBF) during β-adrenergic stimulation were measured in anaesthetized rats using an ultrasonic flow probe. The isometric tension of segmental arteries from normo- and hypertensive rats and segmental arteries from wild-type mice and mice lacking functional KV7.1 channels was examined in a wire-myograph. The β-adrenergic agonist isoprenaline increased RBF significantly in vivo. Neither activation nor inhibition of KV7 and BKCa channels affected the β-adrenergic RBF response. In segmental arteries from normo- and hypertensive rats, inhibition of KV7 channels significantly decreased the β-adrenergic vasorelaxation. However, inhibiting BKCa channels was equally effective in reducing the β-adrenergic vasorelaxation. The β-adrenergic vasorelaxation was not different between segmental arteries from wild-type mice and mice lacking KV7.1 channels. As opposed to rats, inhibition of KV7 channels did not affect the murine β-adrenergic vasorelaxation. Although inhibition and activation of KV7 channels or BKCa channels significantly changed baseline RBF in vivo, none of the treatments affected β-adrenergic vasodilatation. In isolated segmental arteries, however, inhibition of KV7 and BKCa channels significantly reduced the β-adrenergic vasorelaxation, indicating that the regulation of RBF in vivo is driven by several actors in order to maintain an adequate RBF. Our data illustrates the challenge in extrapolating results from in vitro to in vivo conditions.
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Affiliation(s)
- Charlotte Mehlin Sorensen
- Department of Biomedical Sciences, Physiology of Circulation, Kidney and LungUniversity of CopenhagenCopenhagenDenmark
| | | | - Anniek Frederike Lubberding
- Department of Biomedical Sciences, Physiology of Inflammation, Metabolism and OxidationUniversity of CopenhagenCopenhagenDenmark
| | - Niels‐Henrik Holstein‐Rathlou
- Department of Biomedical Sciences, Physiology of Circulation, Kidney and LungUniversity of CopenhagenCopenhagenDenmark
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2
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Cha JJ, Park BY, Yoon SG, Park HJ, Yoo JA, Ghee JY, Cha DR, Seong JY, Kang YS. Spexin-based galanin receptor 2 agonist improves renal injury in mice with type 2 diabetes. Anim Cells Syst (Seoul) 2023; 27:187-196. [PMID: 37789932 PMCID: PMC10543361 DOI: 10.1080/19768354.2023.2263067] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/19/2023] [Indexed: 10/05/2023] Open
Abstract
The spexin-based GALR2 agonist (NS200) is a novel drug, which has shown antidepressant and anxiolytic action in a recent experimental study. In this study, we investigated the effects of NS200 on renal injury in an animal model of type 2 diabetes. Eight-week-old diabetic db/db mice were administered NS200 for 12 weeks. NS200 was intraperitoneally administered at a dose of 1.0 mg/kg/day. Metabolic parameters and structural and molecular changes in the kidneys were compared among the three groups: non-diabetic db/m control, db/db mice, and NS200-treated db/db mice. In db/db mice, NS200 administration did not impact the body weight, food and water intake, urinary volume, fasting blood glucose level, or HbA1c levels. Insulin and glucose tolerance were also unaffected by NS200 treatment. However, NS200 improved urinary albumin excretion and glomerulosclerosis in diabetic kidneys. Activation of TGFβ1 and insulin signaling pathways, such as PI3 K /AKT/ERK, were inhibited by NS200. In conclusion, a spexin-based GALR2 agonist attenuated diabetic nephropathy by alleviating renal fibrosis in mice with type 2 diabetes. Spexin-based GALR2 agonists have considerable potential as novel treatment agents in diabetic nephropathy.
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Affiliation(s)
- Jin Joo Cha
- Department of Nephrology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
| | - Boo Yeon Park
- Department of Nephrology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
| | - Sung Gi Yoon
- Department of Nephrology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
| | - Hye Jin Park
- Department of Nephrology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
| | - Ji Ae Yoo
- Department of Nephrology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
| | - Jung Yeon Ghee
- Department of Nephrology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
| | - Dae Ryong Cha
- Department of Nephrology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
| | - Jae Young Seong
- Graduate School of Biomedical Science, Korea University College of Medicine, Seoul, Republic of Korea
| | - Young Sun Kang
- Department of Nephrology, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
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3
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Wang Q, Han W, Ma C, Wang T, Zhong J. Western blot normalization: Time to choose a proper loading control seriously. Electrophoresis 2023; 44:854-863. [PMID: 36645159 DOI: 10.1002/elps.202200222] [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: 09/11/2022] [Revised: 12/28/2022] [Accepted: 01/03/2023] [Indexed: 01/17/2023]
Abstract
Recent research has questioned the validity of housekeeping proteins in Western blot. Our present study proposed new ideas for Western blot normalization that improved the reproducibility of scientific research. We used the Gene Expression Omnibus (GEO) database and the web tool GEO2R to exclude unstable housekeeping genes quickly. In ischemic heart tissues, actin and tubulin changed significantly, whereas no statistically significant changes were observed in the expression of genes relative to glyceraldehyde-3-phosphate dehydrogenase (GAPDH). Besides, the reliability of GAPDH was further examined by Western blot. Additionally, unstable housekeeping genes were found in other animal models of cardiovascular medicine. We also found that sodium dodecyl sulfate and temperature significantly impacted the results of Ponceau S staining. Membranes stained with Ponceau S after immunodetection could avoid this interference, and the coefficients of variation for post-immunodetection staining are lower than those produced by GAPDH immunodetection. Overall, we described a new use of differential gene expression analysis and proposed a modified Ponceau S staining method, which provided researchers with a proper loading control for Western blot and hence could improve reproducibility in research.
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Affiliation(s)
- Qinhong Wang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, P. R. China
| | - Wenqiang Han
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, P. R. China
| | - Chuanzhen Ma
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, P. R. China
| | - Tianyu Wang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, P. R. China
| | - Jingquan Zhong
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, P. R. China.,Department of Cardiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, Shandong, P. R. China
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Moreno KGT, Marques AAM, da Silva GP, Lourençone BR, Fortini CS, Leite PRT, dos Santos AC, Souza RIC, da Siva LI, Gasparotto Junior A. A New Approach for the Development of Multiple Cardiovascular Risk Factors in Two Rat Models of Hypertension. Pharmaceuticals (Basel) 2022; 15:ph15070853. [PMID: 35890152 PMCID: PMC9318210 DOI: 10.3390/ph15070853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 01/21/2023] Open
Abstract
Cardiovascular disease (CVD) is the leading cause of death among non-communicable diseases. There is a lack of valid animal models that mimic associations among multiple cardiovascular risk factors in humans. The present study developed an animal model that uses multiple cardiovascular risk factors—namely, hypertension, hypothyroidism, and a high-fat diet (HFD). Two models of hypertension were used: renovascular hypertension (two-kidney, one clip [2K1C]) and spontaneously hypertensive rats (SHRs). The naive group was composed of normotensive rats. Twelve weeks after surgery to induce renovascular hypertension, rats in the 2K1C and SHR groups underwent thyroidectomy. The HFD was then implemented for 6 weeks. Renal function, serum redox status, biochemical CVD markers, electrocardiographic profile, blood pressure, mesenteric vascular bed reactivity, histopathology, and morphometry were investigated. Both experimental models induced dyslipidemia, renal function impairment, and hepatic steatosis, accompanied by higher levels of different inflammatory markers and serum oxidative stress. These alterations contributed to end-organ damage in all hypertensive rats. Our findings corroborate a viable alternative model that involves multiple cardiovascular risk factors and resembles conditions that are seen in humans. Both models mimicked CVD, but our data show that SHRs exhibit more significant pathophysiological changes.
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Affiliation(s)
- Karyne Garcia Tafarelo Moreno
- Laboratory of Cardiovascular Pharmacology (LaFAC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (K.G.T.M.); (A.A.M.M.); (G.P.d.S.); (B.R.L.); (C.S.F.); (P.R.T.L.)
| | - Aline Aparecida Macedo Marques
- Laboratory of Cardiovascular Pharmacology (LaFAC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (K.G.T.M.); (A.A.M.M.); (G.P.d.S.); (B.R.L.); (C.S.F.); (P.R.T.L.)
| | - Gabriela Pereira da Silva
- Laboratory of Cardiovascular Pharmacology (LaFAC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (K.G.T.M.); (A.A.M.M.); (G.P.d.S.); (B.R.L.); (C.S.F.); (P.R.T.L.)
| | - Bethânia Rosa Lourençone
- Laboratory of Cardiovascular Pharmacology (LaFAC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (K.G.T.M.); (A.A.M.M.); (G.P.d.S.); (B.R.L.); (C.S.F.); (P.R.T.L.)
| | - Clara Soligo Fortini
- Laboratory of Cardiovascular Pharmacology (LaFAC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (K.G.T.M.); (A.A.M.M.); (G.P.d.S.); (B.R.L.); (C.S.F.); (P.R.T.L.)
| | - Patrícia Regina Terço Leite
- Laboratory of Cardiovascular Pharmacology (LaFAC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (K.G.T.M.); (A.A.M.M.); (G.P.d.S.); (B.R.L.); (C.S.F.); (P.R.T.L.)
| | - Ariany Carvalho dos Santos
- Laboratory of Histopathology, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (A.C.d.S.); (R.I.C.S.)
| | - Roosevelt Isaías Carvalho Souza
- Laboratory of Histopathology, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (A.C.d.S.); (R.I.C.S.)
| | - Leila Isabel da Siva
- Post-Graduate Program in Biotechnology Applied to Agriculture, Paranaense University, Umuarama 87502-210, Brazil;
| | - Arquimedes Gasparotto Junior
- Laboratory of Cardiovascular Pharmacology (LaFAC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados 79825-070, Brazil; (K.G.T.M.); (A.A.M.M.); (G.P.d.S.); (B.R.L.); (C.S.F.); (P.R.T.L.)
- Correspondence: ; Tel.: +55-(67)-3410-2333; Fax: +55-(67)-3410-2321
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Tan N, Zhang Y, Zhang Y, Li L, Zong Y, Han W, Liu L. Berberine ameliorates vascular dysfunction by a global modulation of lncRNA and mRNA expression profiles in hypertensive mouse aortae. PLoS One 2021; 16:e0247621. [PMID: 33621262 PMCID: PMC7901729 DOI: 10.1371/journal.pone.0247621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 02/09/2021] [Indexed: 12/24/2022] Open
Abstract
Objective The current study investigated the mechanism underlying the therapeutic effects of berberine in the vasculature in hypertension. Methods Angiotensin II (Ang II)-loaded osmotic pumps were implanted in C57BL/6J mice with or without berberine administration. Mouse aortae were suspended in myograph for force measurement. Microarray technology were performed to analyze expression profiles of lncRNAs and mRNAs in the aortae. These dysregulated expressions were then validated by qRT-PCR. LncRNA-mRNA co-expression network was constructed to reveal the specific relationships. Results Ang Ⅱ resulted in a significant increase in the blood pressure of mice, which was suppressed by berberine. The impaired endothelium-dependent aortic relaxation was restored in hypertensive mice. Microarray data revealed that 578 lncRNAs and 554 mRNAs were up-regulated, while 320 lncRNAs and 377 mRNAs were down-regulated in the aortae by Ang Ⅱ; both were reversed by berberine treatment. qRT-PCR validation results of differentially expressed genes (14 lncRNAs and 6 mRNAs) were completely consistent with the microarray data. GO analysis showed that these verified differentially expressed genes were significantly enriched in terms of “cellular process”, “biological regulation” and “regulation of biological process”, whilst KEGG analysis identified vascular function-related pathways including cAMP signaling pathway, cGMP-PKG signaling pathway, and calcium signaling pathway etc. Importantly, we observed that lncRNA ENSMUST00000144849, ENSMUST00000155383, and AK041185 were majorly expressed in endothelial cells. Conclusion The present results suggest that the five lncRNAs ENSMUST00000144849, NR_028422, ENSMUST00000155383, AK041185, and uc.335+ might serve critical regulatory roles in hypertensive vasculature by targeting pivotal mRNAs and subsequently affecting vascular function-related pathways. Moreover, these lncRNAs were modulated by berberine, therefore providing the novel potential therapeutic targets of berberine in hypertension. Furthermore, lncRNA ENSMUST00000144849, ENSMUST00000155383, and AK041185 might be involved in the preservation of vascular endothelial cell function.
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Affiliation(s)
- Na Tan
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Yi Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Yan Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Li Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Yi Zong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Wenwen Han
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Limei Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
- * E-mail:
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6
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The pathophysiology of acute gastric ulcer development in normotensive and hypertensive rats: A comparative study. Eur J Pharmacol 2020; 887:173469. [DOI: 10.1016/j.ejphar.2020.173469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/30/2020] [Accepted: 08/06/2020] [Indexed: 01/24/2023]
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7
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Qi X, Qi C, Qin B, Kang X, Hu Y, Han W. Immune-Stromal Score Signature: Novel Prognostic Tool of the Tumor Microenvironment in Lung Adenocarcinoma. Front Oncol 2020; 10:541330. [PMID: 33072571 PMCID: PMC7538811 DOI: 10.3389/fonc.2020.541330] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 08/14/2020] [Indexed: 12/16/2022] Open
Abstract
Background: Immune and stromal cells in the tumor microenvironment (TME) significantly contribute to the prognosis of lung adenocarcinoma; however, the TME-related immune prognostic signature is unknown. The aim of this study was to develop a novel immune prognostic model of the TME in lung adenocarcinoma. Methods: First, the immune and stromal scores among lung adenocarcinoma patients were determined using the ESTIMATE algorithm in accordance with The Cancer Genome Atlas (TCGA) database. Differentially expressed immune-related genes (IRGs) between high and low immune/stromal score groups were analyzed, and a univariate Cox regression analysis was performed to identify IRGs significantly correlated with overall survival (OS) among patients with lung adenocarcinoma. Furthermore, a least absolute shrinkage and selection operator (LASSO) regression analysis was performed to generate TME-related immune prognostic signatures. Gene set enrichment analysis was performed to analyze the mechanisms underlying these immune prognostic signatures. Finally, the functions of hub IRGs were further analyzed to delineate the potential prognostic mechanisms in comprehensive TCGA datasets. Results: In total, 702 intersecting differentially expressed IRGs (589 upregulated and 113 downregulated) were screened. Univariate Cox regression analysis revealed that 58 significant differentially expressed IRGs were correlated with patient prognosis in the training cohort, of which three IRGs (CLEC17A, INHA, and XIRP1) were identified through LASSO regression analysis. A robust prognostic model was generated on the basis of this three-IRG signature. Furthermore, functional enrichment analysis of the high-risk-score group was performed primarily on the basis of metabolic pathways, whereas analysis of the low-risk-score group was performed primarily on the basis of immunoregulation and immune cell activation. Finally, hub IRGs CLEC17A, INHA, and XIRP1 were considered novel prognostic biomarkers for lung adenocarcinoma. These hub genes had different mutation frequencies and forms in lung adenocarcinoma and participated in different signaling pathways. More importantly, these hub genes were significantly correlated with the infiltration of CD4+ T cells, CD8+ T cells, macrophages, B cells, and neutrophils. Conclusions: The robust novel TME-related immune prognostic signature effectively predicted the prognosis of patients with lung adenocarcinoma. Further studies are required to further elucidate the regulatory mechanisms of these hub IRGs in the TME and to develop new treatment strategies.
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Affiliation(s)
- Xiaoguang Qi
- Department of Oncology, Chinese PLA General Hospital, Beijing, China
| | - Chunyan Qi
- Department of Health Management, Chinese PLA General Hospital, Beijing, China
| | - Boyu Qin
- Department of Oncology, Chinese PLA General Hospital, Beijing, China
| | - Xindan Kang
- Department of Oncology, Chinese PLA General Hospital, Beijing, China
| | - Yi Hu
- Department of Oncology, Chinese PLA General Hospital, Beijing, China
| | - Weidong Han
- Department of Bio-therapeutic, Chinese PLA General Hospital, Beijing, China
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Defective Function of the Blood-Brain Barrier in a Stroke-Prone Spontaneously Hypertensive Rat: Evaluation in an In Vitro Cell Culture Model. Cell Mol Neurobiol 2020; 42:243-253. [PMID: 32648236 DOI: 10.1007/s10571-020-00917-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 07/05/2020] [Indexed: 12/12/2022]
Abstract
The blood-brain barrier (BBB) comprises three cell types: brain capillary endothelial cells (BECs), astrocytes, and pericytes. Abnormal interaction among these cells may induce BBB dysfunction and lead to cerebrovascular diseases. The stroke-prone spontaneously hypertensive rat (SHRSP) harbors a defective BBB, so we designed the present study to examine the role of these three cell types in a functional disorder of the BBB in SHRSP in order to elucidate the role of these cells in the BBB more generally. To this end, we employed a unique in vitro model of BBB, in which various combinations of the cells could be tested. The three types of cells were prepared from both SHRSPs and Wistar Kyoto rats (WKYs). They were then co-cultured in various combinations to construct in vitro BBB models. The barrier function of the models was estimated by measuring transendothelial electrical resistance and the permeability of the endothelial monolayer to sodium fluorescein. The in vitro models revealed that (1) BECs from SHRSPs had an inherent lower barrier function, (2) astrocytes of SHRSPs had an impaired ability to induce barrier function in BECs, although (3) both pericytes and astrocytes of SHRSPs and WKYs could potentiate the barrier function of BECs under co-culture conditions. Furthermore, we found that claudin-5 expression was consistently lower in models that used BECs and/or SHRSP astrocytes. These results suggested that defective interaction among BBB cells-especially BECs and astrocytes-was responsible for a functional disorder of the BBB in SHRSPs.
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