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Kawada T, Fukumitsu M, Matsushita H, Yoshida Y, Sato K, Morita H, Nishikawa T, Suehara S, Sawada S, Saku K. Effects of bilateral renal denervation on open-loop baroreflex function and urine excretion in spontaneously hypertensive rats. Hypertens Res 2024:10.1038/s41440-024-01883-5. [PMID: 39261702 DOI: 10.1038/s41440-024-01883-5] [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: 05/17/2024] [Revised: 07/31/2024] [Accepted: 08/15/2024] [Indexed: 09/13/2024]
Abstract
Bilateral renal denervation (RDN) decreases arterial pressure (AP) or delays the development of hypertension in spontaneously hypertensive rats (SHR), but whether bilateral RDN significantly modifies urine output function during baroreflex-mediated acute AP changes remains unknown. We quantified the relationship between AP and normalized urine flow (nUF) in SHR that underwent bilateral RDN (n = 9) and compared the results with those in sham-operated SHR (n = 9). Moreover, we examined the acute effect of an angiotensin II type 1 receptor blocker telmisartan (2.5 mg/kg) on the AP-nUF relationship. Bilateral RDN significantly decreased AP by narrowing the response range of the total arc of the carotid sinus baroreflex. The slopes of nUF versus the mean AP (in μL·min-1·kg-1·mmHg-1) in the sham and RDN groups under baseline conditions were 0.076 ± 0.045 and 0.188 ± 0.039, respectively; and those after telmisartan administration were 0.285 ± 0.034 and 0.416 ± 0.078, respectively. The effect of RDN on the nUF slope was marginally significant (P = 0.059), which may have improved the controllability of urine output in the RDN group. The effect of telmisartan on the nUF slope was significant (P < 0.001) in the sham and RDN groups, signifying the contribution of circulating or locally produced angiotensin II to determining urine output function regardless of ongoing renal sympathetic nerve activity.
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Affiliation(s)
- Toru Kawada
- Department of Cardiovascular Dynamics, National Cerebral and Cardiovascular Center, Osaka, Japan.
| | - Masafumi Fukumitsu
- Department of Cardiovascular Dynamics, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Hiroki Matsushita
- Department of Cardiovascular Dynamics, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Yuki Yoshida
- Department of Cardiovascular Dynamics, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Kei Sato
- Department of Cardiovascular Dynamics, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Hidetaka Morita
- Department of Cardiovascular Dynamics, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Takuya Nishikawa
- Department of Research Promotion and Management, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Satoru Suehara
- Corporate R&D Center, Terumo Corporation, Kanagawa, Japan
| | - Satoshi Sawada
- Corporate R&D Center, Terumo Corporation, Kanagawa, Japan
| | - Keita Saku
- Department of Cardiovascular Dynamics, National Cerebral and Cardiovascular Center, Osaka, Japan
- Bio Digital Twin Center, National Cerebral and Cardiovascular Center, Osaka, Japan
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Abdulla MH, AlMarabeh S, Bolger T, Lucking EF, O'Halloran KD, Johns EJ. Effects of intrarenal pelvic infusion of tumour necrosis factor-α and interleukin 1-β on reno-renal reflexes in anaesthetised rats. J Hypertens 2024; 42:1027-1038. [PMID: 38690904 DOI: 10.1097/hjh.0000000000003689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
OBJECTIVE Reno-renal reflexes are disturbed in cardiovascular and hypertensive conditions when elevated levels of pro-inflammatory mediators/cytokines are present within the kidney. We hypothesised that exogenously administered inflammatory cytokines tumour necrosis factor alpha (TNF-α) and interleukin (IL)-1β modulate the renal sympatho-excitatory response to chemical stimulation of renal pelvic sensory nerves. METHODS In anaesthetised rats, intrarenal pelvic infusions of vehicle [0.9% sodium chloride (NaCl)], TNF-α (500 and 1000 ng/kg) and IL-1β (1000 ng/kg) were maintained for 30 min before chemical activation of renal pelvic sensory receptors was performed using randomized intrarenal pelvic infusions of hypertonic NaCl, potassium chloride (KCl), bradykinin, adenosine and capsaicin. RESULTS The increase in renal sympathetic nerve activity (RSNA) in response to intrarenal pelvic hypertonic NaCl was enhanced during intrapelvic TNF-α (1000 ng/kg) and IL-1β infusions by almost 800% above vehicle with minimal changes in mean arterial pressure (MAP) and heart rate (HR). Similarly, the RSNA response to intrarenal pelvic adenosine in the presence of TNF-α (500 ng/kg), but not IL-1β, was almost 200% above vehicle but neither MAP nor HR were changed. There was a blunted sympatho-excitatory response to intrapelvic bradykinin in the presence of TNF-α (1000 ng/kg), but not IL-1β, by almost 80% below vehicle, again without effect on either MAP or HR. CONCLUSION The renal sympatho-excitatory response to renal pelvic chemoreceptor stimulation is modulated by exogenous TNF-α and IL-1β. This suggests that inflammatory mediators within the kidney can play a significant role in modulating the renal afferent nerve-mediated sympatho-excitatory response.
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Affiliation(s)
- Mohammed H Abdulla
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
| | - Sara AlMarabeh
- Department of Neurobiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Biopharmaceutics and Clinical Pharmacy, School of Pharmacy, The University of Jordan, Amman, Jordan
| | - Tom Bolger
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
| | - Eric F Lucking
- 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
| | - Edward J Johns
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
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Cui X, Zhang T, Xie T, Guo FX, Zhang YY, Deng YJ, Wang Q, Guo YX, Dong MH, Luo XT. Research Progress on the Correlation Between Hypertension and Gut Microbiota. J Multidiscip Healthc 2024; 17:2371-2387. [PMID: 38770171 PMCID: PMC11104380 DOI: 10.2147/jmdh.s463880] [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: 02/12/2024] [Accepted: 04/23/2024] [Indexed: 05/22/2024] Open
Abstract
Among cardiovascular diseases, hypertension is the most important risk factor for morbidity and mortality worldwide, and its pathogenesis is complex, involving genetic, dietary and environmental factors. The characteristics of the gut microbiota can vary in response to increased blood pressure (BP) and influence the development and progression of hypertension. This paper describes five aspects of the relationship between hypertension and the gut microbiota, namely, the different types of gut microbiota, metabolites of the gut microbiota, sympathetic activation, gut-brain interactions, the effects of exercise and dietary patterns and the treatment of the gut microbiota through probiotics, faecal microbiota transplantation (FMT) and herbal remedies, providing new clues for the future prevention of hypertension. Diet, exercise and traditional Chinese medicine may contribute to long-term improvements in hypertension, although the effects of probiotics and FMT still need to be validated in large populations.
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Affiliation(s)
- Xiaomei Cui
- Key Laboratory of Cardio Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, People’s Republic of China
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Ting Zhang
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Tao Xie
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Fang-xi Guo
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Yu-ying Zhang
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Yuan-jia Deng
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Qi Wang
- Key Laboratory of Cardio Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, People’s Republic of China
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Yi-xing Guo
- Key Laboratory of Cardio Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, People’s Republic of China
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Ming-hua Dong
- Key Laboratory of Cardio Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, People’s Republic of China
- School of Public Health and Health Management, Gannan Medical University, Ganzhou, People’s Republic of China
| | - Xiao-ting Luo
- Key Laboratory of Cardio Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, People’s Republic of China
- School of General Medicine, Gannan Medical University, Ganzhou, People’s Republic of China
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Musolino M, D’Agostino M, Zicarelli M, Andreucci M, Coppolino G, Bolignano D. Spice Up Your Kidney: A Review on the Effects of Capsaicin in Renal Physiology and Disease. Int J Mol Sci 2024; 25:791. [PMID: 38255865 PMCID: PMC10815060 DOI: 10.3390/ijms25020791] [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: 12/10/2023] [Revised: 12/31/2023] [Accepted: 01/06/2024] [Indexed: 01/24/2024] Open
Abstract
Capsaicin, the organic compound which attributes the spicy flavor and taste of red peppers and chili peppers, has been extensively studied for centuries as a potential natural remedy for the treatment of several illnesses. Indeed, this compound exerts well-known systemic pleiotropic effects and may thus bring important benefits against various pathological conditions like neuropathic pain, rhinitis, itching, or chronic inflammation. Yet, little is known about the possible biological activity of capsaicin at the kidney level, as this aspect has only been addressed by sparse experimental investigations. In this paper, we aimed to review the available evidence focusing specifically on the effects of capsaicin on renal physiology, as well as its potential benefits for the treatment of various kidney disorders. Capsaicin may indeed modulate various aspects of renal function and renal nervous activity. On the other hand, the observed experimental benefits in preventing acute kidney injury, slowing down the progression of diabetic and chronic kidney disease, ameliorating hypertension, and even delaying renal cancer growth may set the stage for future human trials of capsaicin administration as an adjuvant or preventive therapy for different, difficult-to-treat renal diseases.
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Affiliation(s)
- Michela Musolino
- Nephrology and Dialysis Unit, Magna Graecia University Hospital, 88100 Catanzaro, Italy; (M.M.); (M.D.); (M.A.); (G.C.)
- Department of Health Sciences, Magna Graecia University, 88100 Catanzaro, Italy;
| | - Mario D’Agostino
- Nephrology and Dialysis Unit, Magna Graecia University Hospital, 88100 Catanzaro, Italy; (M.M.); (M.D.); (M.A.); (G.C.)
| | | | - Michele Andreucci
- Nephrology and Dialysis Unit, Magna Graecia University Hospital, 88100 Catanzaro, Italy; (M.M.); (M.D.); (M.A.); (G.C.)
- Department of Health Sciences, Magna Graecia University, 88100 Catanzaro, Italy;
| | - Giuseppe Coppolino
- Nephrology and Dialysis Unit, Magna Graecia University Hospital, 88100 Catanzaro, Italy; (M.M.); (M.D.); (M.A.); (G.C.)
- Department of Health Sciences, Magna Graecia University, 88100 Catanzaro, Italy;
| | - Davide Bolignano
- Nephrology and Dialysis Unit, Magna Graecia University Hospital, 88100 Catanzaro, Italy; (M.M.); (M.D.); (M.A.); (G.C.)
- Department of Medical and Surgical Sciences, Magna Graecia University, 88100 Catanzaro, Italy
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Bo JH, Wang JX, Wang XL, Jiao Y, Jiang M, Chen JL, Hao WY, Chen Q, Li YH, Ma ZL, Zhu GQ. Dexmedetomidine Attenuates Lipopolysaccharide-Induced Sympathetic Activation and Sepsis via Suppressing Superoxide Signaling in Paraventricular Nucleus. Antioxidants (Basel) 2022; 11:antiox11122395. [PMID: 36552603 PMCID: PMC9774688 DOI: 10.3390/antiox11122395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/15/2022] [Accepted: 11/29/2022] [Indexed: 12/07/2022] Open
Abstract
Sympathetic overactivity contributes to the pathogenesis of sepsis. The selective α2-adrenergic receptor agonist dexmedetomidine (DEX) is widely used for perioperative sedation and analgesia. We aimed to determine the central roles and mechanisms of DEX in attenuating sympathetic activity and inflammation in sepsis. Sepsis was induced by a single intraperitoneal injection of lipopolysaccharide (LPS) in rats. Effects of DEX were investigated 24 h after injection of LPS. Bilateral microinjection of DEX in the paraventricular nucleus (PVN) attenuated LPS-induced sympathetic overactivity, which was attenuated by the superoxide dismutase inhibitor DETC, cAMP analog db-cAMP or GABAA receptor antagonist gabazine. Superoxide scavenger tempol, NADPH oxidase inhibitor apocynin, adenylate cyclase inhibitor SQ22536 or PKA inhibitor Rp-cAMP caused similar effects to DEX in attenuating LPS-induced sympathetic activation. DEX inhibited LPS-induced superoxide and cAMP production, as well as NADPH oxidase, adenylate cyclase and PKA activation. The roles of DEX in reducing superoxide production and NADPH oxidase activation were attenuated by db-cAMP or gabazine. Intravenous infusion of DEX inhibited LPS-induced sympathetic overactivity, NOX activation, superoxide production, TNF-α and IL-1β upregulation in the PVN and plasma, as well as lung and renal injury, which were attenuated by the PVN microinjection of yohimbine and DETC. We conclude that activation of α2-adrenergic receptors with DEX in the PVN attenuated LPS-induced sympathetic overactivity by reducing NADPH oxidase-dependent superoxide production via both inhibiting adenylate cyclase-cAMP-PKA signaling and activating GABAA receptors. The inhibition of NADPH oxidase-dependent superoxide production in the PVN partially contributes to the roles of intravenous infusion of DEX in attenuating LPS-induced sympathetic activation, oxidative stress and inflammation.
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Affiliation(s)
- Jin-Hua Bo
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Physiology, Nanjing Medical University, Nanjing 211166, China
- Department of Anesthesiology, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Jing-Xiao Wang
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Physiology, Nanjing Medical University, Nanjing 211166, China
| | - Xiao-Li Wang
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Physiology, Nanjing Medical University, Nanjing 211166, China
| | - Yang Jiao
- Department of Anesthesiology, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Ming Jiang
- Department of Anesthesiology, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Jun-Liu Chen
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Physiology, Nanjing Medical University, Nanjing 211166, China
| | - Wen-Yuan Hao
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Physiology, Nanjing Medical University, Nanjing 211166, China
| | - Qi Chen
- Department of Pathophysiology, Nanjing Medical University, Nanjing 211166, China
| | - Yue-Hua Li
- Department of Pathophysiology, Nanjing Medical University, Nanjing 211166, China
| | - Zheng-Liang Ma
- Department of Anesthesiology, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
- Correspondence: (Z.-L.M.); (G.-Q.Z.)
| | - Guo-Qing Zhu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Physiology, Nanjing Medical University, Nanjing 211166, China
- Correspondence: (Z.-L.M.); (G.-Q.Z.)
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Wu LL, Zhang Y, Li XZ, Du XL, Gao Y, Wang JX, Wang XL, Chen Q, Li YH, Zhu GQ, Tan X. Impact of Selective Renal Afferent Denervation on Oxidative Stress and Vascular Remodeling in Spontaneously Hypertensive Rats. Antioxidants (Basel) 2022; 11:1003. [PMID: 35624870 PMCID: PMC9137540 DOI: 10.3390/antiox11051003] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/15/2022] [Accepted: 05/18/2022] [Indexed: 02/01/2023] Open
Abstract
Oxidative stress and sustained sympathetic over-activity contribute to the pathogenesis of hypertension. Catheter-based renal denervation has been used as a strategy for treatment of resistant hypertension, which interrupts both afferent and efferent renal fibers. However, it is unknown whether selective renal afferent denervation (RAD) may play beneficial roles in attenuating oxidative stress and sympathetic activity in hypertension. This study investigated the impact of selective RAD on hypertension and vascular remodeling. Nine-week-old normotensive Wistar-Kyoto rats (WKY) and spontaneously hypertensive rats (SHR) were subjected to selective renal afferent denervation (RAD) with 33 mM of capsaicin for 15 min. Treatment with the vehicle of capsaicin was used as a control. The selective denervation was confirmed by the reduced calcitonin gene-related peptide expression and the undamaged renal sympathetic nerve activity response to the stimulation of adipose white tissue. Selective RAD reduced plasma norepinephrine levels, improved heart rate variability (HRV) and attenuated hypertension in SHR.It reduced NADPH oxidase (NOX) expression and activity, and superoxide production in the hypothalamic paraventricular nucleus (PVN), aorta and mesenteric artery of SHR. Moreover, the selective RAD attenuated the vascular remodeling of the aorta and mesenteric artery of SHR. These results indicate that selective removal of renal afferents attenuates sympathetic activity, oxidative stress, vascular remodeling and hypertension in SHR. The attenuated superoxide signaling in the PVN is involved in the attenuation of sympathetic activity in SHR, and the reduced sympathetic activity at least partially contributes to the attenuation of vascular oxidative stress and remodeling in the arteries of hypertensive rats.
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Affiliation(s)
- Lu-Lu Wu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center of Translational Medicine for Cardiovascular Disease, and Department of Physiology, Nanjing Medical University, Nanjing 211166, China; (L.-L.W.); (J.-X.W.); (X.-L.W.)
| | - Yue Zhang
- Emergency Department, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 211166, China; (Y.Z.); (X.-Z.L.); (X.-L.D.); (Y.G.)
| | - Xiu-Zhen Li
- Emergency Department, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 211166, China; (Y.Z.); (X.-Z.L.); (X.-L.D.); (Y.G.)
| | - Xin-Li Du
- Emergency Department, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 211166, China; (Y.Z.); (X.-Z.L.); (X.-L.D.); (Y.G.)
| | - Ying Gao
- Emergency Department, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 211166, China; (Y.Z.); (X.-Z.L.); (X.-L.D.); (Y.G.)
| | - Jing-Xiao Wang
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center of Translational Medicine for Cardiovascular Disease, and Department of Physiology, Nanjing Medical University, Nanjing 211166, China; (L.-L.W.); (J.-X.W.); (X.-L.W.)
| | - Xiao-Li Wang
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center of Translational Medicine for Cardiovascular Disease, and Department of Physiology, Nanjing Medical University, Nanjing 211166, China; (L.-L.W.); (J.-X.W.); (X.-L.W.)
| | - Qi Chen
- Department of Pathophysiology, Nanjing Medical University, Nanjing 211166, China; (Q.C.); (Y.-H.L.)
| | - Yue-Hua Li
- Department of Pathophysiology, Nanjing Medical University, Nanjing 211166, China; (Q.C.); (Y.-H.L.)
| | - Guo-Qing Zhu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center of Translational Medicine for Cardiovascular Disease, and Department of Physiology, Nanjing Medical University, Nanjing 211166, China; (L.-L.W.); (J.-X.W.); (X.-L.W.)
| | - Xiao Tan
- Emergency Department, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 211166, China; (Y.Z.); (X.-Z.L.); (X.-L.D.); (Y.G.)
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