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Suh SH, Oh TR, Choi HS, Kim CS, Bae EH, Ma SK, Oh KH, Jung JY, Hyun YY, Kim SW. Circulating osteoprotegerin as a cardiac biomarker for left ventricular diastolic dysfunction in patients with pre-dialysis chronic kidney disease: the KNOW-CKD study. Clin Res Cardiol 2024:10.1007/s00392-024-02382-w. [PMID: 38319325 DOI: 10.1007/s00392-024-02382-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 01/16/2024] [Indexed: 02/07/2024]
Abstract
BACKGROUND Heart failure with preserved ejection fraction (HFpEF) is a major cause of mortality in patients with chronic kidney disease (CKD), and diagnosis is challenging. Moreover, no specific biomarker for HFpEF has been validated in patients with CKD. The present study aimed to investigate the association between serum osteoprotegerin (OPG) levels and the risk of left ventricular diastolic dysfunction (LVDD), a surrogate of HFpEF, in patients with pre-dialysis CKD. METHODS A total of 2039 patients with CKD at stage 1 to pre-dialysis 5 were categorized into quartiles (Q1 to Q4) by serum OPG levels, and were cross-sectionally analyzed. The study outcome was LVDD, which was operationally defined as the ratio of early transmitral blood flow velocity to early diastolic velocity of the mitral annulus (E/e') > 14. RESULTS In the analysis of baseline characteristics, higher serum OPG levels were clearly related to the risk factors of HFpEF. A scatter plot analysis revealed a moderate correlation between serum OPG levels and E/e' (R = 0.351, P < 0.001). Logistic regression analysis demonstrated that the risk of LVDD in Q3 (adjusted odds ratio 2.576, 95% confidence interval 1.279 to 5.188) and Q4 (adjusted odds ratio 3.536, 95% confidence interval 1.657 to 7.544) was significantly higher than that in Q1. CONCLUSIONS Elevated serum OPG levels are associated with the risk of LVDD in patients with pre-dialysis CKD. The measurement of serum OPG levels may help the diagnosis of LVDD, which is an important echocardiographic feature of HFpEF.
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Affiliation(s)
- Sang Heon Suh
- Department of Internal Medicine, Chonnam National University Medical School and Chonnam National University Hospital, 42 Jebongro, Gwangju, 61469, Korea
| | - Tae Ryom Oh
- Department of Internal Medicine, Chonnam National University Medical School and Chonnam National University Hospital, 42 Jebongro, Gwangju, 61469, Korea
| | - Hong Sang Choi
- Department of Internal Medicine, Chonnam National University Medical School and Chonnam National University Hospital, 42 Jebongro, Gwangju, 61469, Korea
| | - Chang Seong Kim
- Department of Internal Medicine, Chonnam National University Medical School and Chonnam National University Hospital, 42 Jebongro, Gwangju, 61469, Korea
| | - Eun Hui Bae
- Department of Internal Medicine, Chonnam National University Medical School and Chonnam National University Hospital, 42 Jebongro, Gwangju, 61469, Korea
| | - Seong Kwon Ma
- Department of Internal Medicine, Chonnam National University Medical School and Chonnam National University Hospital, 42 Jebongro, Gwangju, 61469, Korea
| | - Kook-Hwan Oh
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Ji Yong Jung
- Division of Nephrology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - Young Youl Hyun
- Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, 03181, Republic of Korea
| | - Soo Wan Kim
- Department of Internal Medicine, Chonnam National University Medical School and Chonnam National University Hospital, 42 Jebongro, Gwangju, 61469, Korea.
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Lu QB, Fu X, Liu Y, Wang ZC, Liu SY, Li YC, Sun HJ. Disrupted cardiac fibroblast BCAA catabolism contributes to diabetic cardiomyopathy via a periostin/NAP1L2/SIRT3 axis. Cell Mol Biol Lett 2023; 28:93. [PMID: 37993768 PMCID: PMC10666354 DOI: 10.1186/s11658-023-00510-4] [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: 08/02/2023] [Accepted: 11/06/2023] [Indexed: 11/24/2023] Open
Abstract
BACKGROUND Periostin is an extracellular matrix protein that plays a critical role in cell fate determination and tissue remodeling, but the underlying role and mechanism of periostin in diabetic cardiomyopathy (DCM) are far from clear. Thus, we aimed to clarify the mechanistic participation of periostin in DCM. METHODS The expression of periostin was examined in DCM patients, diabetic mice and high glucose (HG)-exposed cardiac fibroblasts (CF). Gain- and loss-of-function experiments assessed the potential role of periostin in DCM pathogenesis. RNA sequencing was used to investigate the underlying mechanisms of periostin in DCM. RESULTS A mouse cytokine antibody array showed that the protein expression of periostin was most significantly upregulated in diabetic mouse heart, and this increase was also observed in patients with DCM or HG-incubated CF. Periostin-deficient mice were protected from diabetes-induced cardiac dysfunction and myocardial damage, while overexpression of periostin held the opposite effects. Hyperglycemia stimulated the expression of periostin in a TGF-β/Smad-dependent manner. RNA sequencing results showed that periostin upregulated the expression of nucleosome assembly protein 1-like 2 (NAP1L2) which recruited SIRT3 to deacetylate H3K27ac on the promoters of the branched-chain amino acid (BCAA) catabolism-related enzymes BCAT2 and PP2Cm, resulting in BCAA catabolism impairment. Additionally, CF-derived periostin induced hypertrophy, oxidative injury and inflammation in primary cardiomyocytes. Finally, we identified that glucosyringic acid (GA) specifically targeted and inhibited periostin to ameliorate DCM. CONCLUSION Overall, manipulating periostin expression may function as a promising strategy in the treatment of DCM.
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Affiliation(s)
- Qing-Bo Lu
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
- Department of Endocrine, Affiliated Hospital of Jiangnan University, Jiangnan University, Wuxi, 214125, China
| | - Xiao Fu
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Yao Liu
- Department of Cardiac Ultrasound, The Fourth Affiliated Hospital of Nanjing Medical University, Nanjing, 210000, Jiangsu, China
| | - Zi-Chao Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Lane, Nanjing, 210009, China
| | - Shi-Yi Liu
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Yu-Chao Li
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Hai-Jian Sun
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China.
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Lane, Nanjing, 210009, China.
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Hof A, Guthoff H, Ahdab M, Landerer M, Schäkel J, Niehues J, Schorscher M, Zimmermann O, Winkels H, von Stein P, Geißen S, Baldus S, Adam M, Mollenhauer M, Mehrkens D. Vascular Ultrasound for In Vivo Assessment of Arterial Pathologies in a Murine Model of Atherosclerosis and Aortic Aneurysm. Int J Mol Sci 2023; 24:15261. [PMID: 37894941 PMCID: PMC10607567 DOI: 10.3390/ijms242015261] [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: 09/18/2023] [Revised: 10/11/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
Vascular diseases like atherosclerosis and abdominal aortic aneurysm (AAA) are common pathologies in the western world, promoting various potentially fatal conditions. Here, we evaluate high-resolution (HR) ultrasound in mouse models of atherosclerosis and AAA as a useful tool for noninvasive monitoring of early vascular changes in vivo. We used Apolipoprotein E-deficient (ApoE-/-) mice as an atherosclerosis model and induced AAA development by the implementation of Angiotensin II-releasing osmotic minipumps. HR ultrasound of the carotid artery or the abdominal aorta was performed to monitor vascular remodeling in vivo. Images were analyzed by speckle tracking algorithms and correlated to histological analyses and subsequent automated collagen quantification. Consistent changes were observed via ultrasound in both models: Global radial strain (GRS) was notably reduced in the AAA model (23.8 ± 2.8% vs. 12.5 ± 2.5%, p = 0.01) and in the atherosclerotic mice (20.6 ± 1.3% vs. 15.8 ± 0.9%, p = 0.02). In mice with AAA, vessel distensibility was significantly reduced, whereas intima-media thickness was increased in atherosclerotic mice. The area and collagen content of the tunica media were increased in diseased arteries of both models as measured by automated image analysis of Picrosirius Red-stained aortic sections. Correlation analysis revealed a strong correlation of multiple parameters, predicting early vascular damage in HR ultrasound and histological examinations. In conclusion, our findings underscore the potential of HR ultrasound in effectively tracing early alterations in arterial wall properties in murine models of atherosclerosis and AAA.
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Affiliation(s)
- Alexander Hof
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Henning Guthoff
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Maysam Ahdab
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
| | - Max Landerer
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
| | - Jasper Schäkel
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Jana Niehues
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
| | - Maximilian Schorscher
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Oscar Zimmermann
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Holger Winkels
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Philipp von Stein
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
| | - Simon Geißen
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Stephan Baldus
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Matti Adam
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Martin Mollenhauer
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
| | - Dennis Mehrkens
- Department for Experimental Cardiology, Faculty of Medicine, University of Cologne, Clinic III for Internal Medicine, University Hospital Cologne, 50937 Cologne, Germany; (A.H.); (M.A.); (M.L.); (J.S.); (J.N.); (M.S.); (O.Z.); (H.W.); (P.v.S.); (S.G.); (S.B.); (M.A.); (M.M.)
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50937 Cologne, Germany
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Liu HY, Zhang SP, Zhang CX, Gao QY, Liu YY, Ge SL. Postoperative hypoxemia for patients undergoing Stanford type A aortic dissection. World J Clin Cases 2023; 11:3140-3147. [PMID: 37274044 PMCID: PMC10237117 DOI: 10.12998/wjcc.v11.i14.3140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 03/06/2023] [Accepted: 04/04/2023] [Indexed: 05/16/2023] Open
Abstract
Clinically, it is widely recognized that surgical treatment is the preferred and reliable option for Stanford type A aortic dissection. Stanford type A aortic dissection is an emergent and serious cardiovascular disease characterized with an acute onset, poor prognosis, and high mortality. However, the incidences of postoperative complications are relatively higher due to the complexity of the disease and its intricate procedure. It has been considered that hypoxemia, one of the most common postoperative complications, plays an important role in having a worse clinical prognosis. Therefore, the effective intervention of postoperative hypoxemia is significant for the improved prognosis of patients with Stanford type A aortic dissection.
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Affiliation(s)
- Hai-Yuan Liu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui Province, China
| | - Shuai-Peng Zhang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui Province, China
| | - Cheng-Xin Zhang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui Province, China
| | - Qing-Yun Gao
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui Province, China
| | - Yu-Yong Liu
- First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei 230032, Anhui Province, China
| | - Sheng-Lin Ge
- First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei 230032, Anhui Province, China
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Leyssens L, Balcaen T, Pétréa M, Ayllón NB, Aazmani WE, de Pierpont A, Pyka G, Lacroix V, Kerckhofs G. Non-destructive 3D characterization of the blood vessel wall microstructure in different species and blood vessel types using contrast-enhanced microCT and comparison with synthetic vascular grafts. Acta Biomater 2023; 164:303-316. [PMID: 37072066 DOI: 10.1016/j.actbio.2023.04.013] [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: 12/19/2022] [Revised: 03/14/2023] [Accepted: 04/07/2023] [Indexed: 04/20/2023]
Abstract
To improve the current treatment for vascular diseases, such as vascular grafts, intravascular stents, and balloon angioplasty intervention, the evaluation of the native blood vessel microstructure in full 3D could be beneficial. For this purpose, we used contrast-enhanced X-ray microfocus computed tomography (CECT): a combination of X-ray microfocus computed tomography (microCT) and contrast-enhancing staining agents (CESAs) containing high atomic number elements. In this work, we performed a comparative study based on staining time and contrast-enhancement of 2 CESAs: Monolacunary and 1:2 Hafnium-substituted Wells-Dawson polyoxometalate (Mono-WD POM and Hf-WD POM, respectively) for imaging of the porcine aorta. After showing the advantages of Hf-WD POM in terms of contrast enhancement, we expanded our imaging to other species (rat, porcine, and human) and other types of blood vessels (porcine aorta, femoral artery, and vena cava), clearly indicating microstructural differences between different types of blood vessels and different species. We then showed the possibility to extract useful 3D quantitative information from the rat and porcine aortic wall, potentially to be used for computational modeling or for future design optimization of graft materials. Finally, a structural comparison with existing synthetic vascular grafts was made. This information will allow to better understand the in vivo functioning of native blood vessels and to improve the current disease treatments. STATEMENT OF SIGNIFICANCE: Synthetic vascular grafts, used as treatment for some cardiovascular diseases, still often fail clinically, potentially because of a mismatch in mechanical behaviour between the native blood vessel and the graft. To better understand the causes of this mismatch, we studied the full 3D microstructure of blood vessels. For this, we identified Hafnium-substituted Wells-Dawson polyoxometalate as contrast-enhancing staining agent to perform contrast-enhanced X-ray microfocus computed tomography. This technique allowed to show important differences in the microstructure of different types of blood vessels and in different species, as well as with that of synthetic grafts. This information can lead to a better understanding of the functioning of blood vessels and will allow to improve current disease treatments, such as vascular grafts.
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Affiliation(s)
- Lisa Leyssens
- Mechatronic, Electrical Energy and Dynamic Systems, Institute of Mechanics, Materials, and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium; Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, 1200 Woluwe-Saint-Lambert, Belgium
| | - Tim Balcaen
- Mechatronic, Electrical Energy and Dynamic Systems, Institute of Mechanics, Materials, and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium; Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, 1200 Woluwe-Saint-Lambert, Belgium; MolDesignS, Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, 3001 Leuven, Belgium
| | - Maïté Pétréa
- Department BioMechanics, KU Leuven, 3001 Leuven, Belgium
| | - Natalia Béjar Ayllón
- Mechatronic, Electrical Energy and Dynamic Systems, Institute of Mechanics, Materials, and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | - Walid El Aazmani
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, 1200 Woluwe-Saint-Lambert, Belgium
| | - Alix de Pierpont
- Mechatronic, Electrical Energy and Dynamic Systems, Institute of Mechanics, Materials, and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | - Grzegorz Pyka
- Mechatronic, Electrical Energy and Dynamic Systems, Institute of Mechanics, Materials, and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium; Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, 1200 Woluwe-Saint-Lambert, Belgium
| | - Valérie Lacroix
- Pole of Cardiovascular Research, Institute of Experimental and Clinical Research, UCLouvain, 1200 Woluwe-Saint-Lambert, Belgium; Cliniques Universitaires Saint-Luc, Service de chirurgie cardiovasculaire et thoracique, 1200 Woluwe-Saint-Lambert, Belgium
| | - Greet Kerckhofs
- Mechatronic, Electrical Energy and Dynamic Systems, Institute of Mechanics, Materials, and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium; Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, 1200 Woluwe-Saint-Lambert, Belgium; Department of Materials Engineering, KU Leuven, 3001 Leuven, Belgium; Prometheus, Division of Skeletal Tissue Engineering, KU Leuven, 3000 Leuven, Belgium.
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Analysis of Mechanisms for Increased Blood Pressure Variability in Rats Continuously Infused with Angiotensin II. J Renin Angiotensin Aldosterone Syst 2023; 2023:4201342. [PMID: 36704758 PMCID: PMC9833913 DOI: 10.1155/2023/4201342] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/14/2022] [Accepted: 12/20/2022] [Indexed: 01/06/2023] Open
Abstract
Objective We reported that rats infused with angiotensin II (Ang II) are not only a model of hypertension but also of augmented 24 h blood pressure variability (BPV). In this study, we examined the mechanisms for Ang II-induced BPV, focusing on BP, heart rate (HR), baroreceptor reflex sensitivity (BRS), and medial area of the aortic arch. Methods Nine-week-old male Wistar rats were infused with subcutaneous 5.2 μg/kg/h Ang II with or without oral administration with 30 mg/kg/day azelnidipine for 14 days. BP and HR were recorded every 15 min under an unrestrained condition by a radiotelemetry system, while BPV was evaluated by standard deviation of BP. BRS was quantified by a sequence analysis, and medial thickness of the aortic arch was measured by microscopic examination. Results BPV increased at days 7 and 14 following continuous infusion of Ang II. Before the infusion, a positive correlation was found between BP and HR, but it became negative at day 7 and then weakened or disappeared at day 14. BRS was slightly impaired at day 7 and significantly lowered at day 14, a phenomenon accompanied by thickened medial area of the aortic arch in Ang II-infused rats. Those Ang II-induced alterations were all significantly attenuated by azelnidipine. Conclusions The present findings suggest sequential changes in the mechanisms behind augmented BPV in rats continuously infused with Ang II over 14 days.
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