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Frame AA, Nist KM, Kim K, Puleo F, Moreira JD, Swaldi H, McKenna J, Wainford RD. Integrated renal and sympathetic mechanisms underlying the development of sex- and age-dependent hypertension and the salt sensitivity of blood pressure. GeroScience 2024; 46:6435-6458. [PMID: 38976131 PMCID: PMC11494650 DOI: 10.1007/s11357-024-01266-1] [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: 05/13/2024] [Accepted: 06/25/2024] [Indexed: 07/09/2024] Open
Abstract
Aging is a non-modifiable understudied risk factor for hypertension. We hypothesized that sympathetically mediated activation of renal sodium reabsorption drives age-dependent hypertension and the salt sensitivity of blood pressure (BP). Using 3-, 8-, and 16-month-old male and female Sprague-Dawley rats as a model of normal aging, we assessed BP, indices of sympathetic tone, and the physiological responses to acute and chronic sodium challenge including sodium chloride cotransporter (NCC) regulation. The effects of renal nerve ablation and NCC antagonism were assessed in hypertensive male rats. We observed sex-dependent impaired renal sodium handling (24 h sodium balance (meq), male 3-month 0.36 ± 0.1 vs. 16-month 0.84 ± 0.2; sodium load excreted during 5% bodyweight isotonic saline volume expansion (%) male 3-month 77 ± 5 vs. 16-month 22 ± 8), hypertension (MAP (mmHg) male 3-month 123 ± 4 vs. 16-month 148 ± 6), and the salt sensitivity of BP in aged male, but not female, rats. Attenuated sympathoinhibitory afferent renal nerve (ARN) responses contributed to increased sympathetic tone and hypertension in male rats. Increased sympathetic tone contributes to renal sodium retention, in part through increased NCC activity via a dysfunctional with-no-lysine kinase-(WNK) STE20/SPS1-related proline/alanine-rich kinase signaling pathway, to drive hypertension and the salt sensitivity of BP in aged male rats. NCC antagonism and renal nerve ablation, which reduced WNK dysfunction and decreased NCC activity, attenuated age-dependent hypertension in male Sprague-Dawley rats. The contribution of an impaired sympathoinhibitory ARN reflex to sex- and age-dependent hypertension in an NCC-dependent manner, via an impaired WNK1/WNK4 dynamic, suggests this pathway as a mechanism-based target for the treatment of age-dependent hypertension.
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Affiliation(s)
- Alissa A Frame
- Department of Pharmacology & Experimental Therapeutics and the Whitaker Cardiovascular Institute, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA
| | - Kayla M Nist
- Department of Anatomy & Neurobiology, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA
| | - Kiyoung Kim
- Department of Pharmacology & Experimental Therapeutics and the Whitaker Cardiovascular Institute, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA
| | - Franco Puleo
- Department of Pharmacology & Experimental Therapeutics and the Whitaker Cardiovascular Institute, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA
| | - Jesse D Moreira
- Department of Health Sciences, Sargent College, Boston University, Boston, MA, USA
| | - Hailey Swaldi
- Division of Cardiology, Emory University School of Medicine, 1750 Haygood Drive, Atlanta, GA, N22030322, USA
| | - James McKenna
- Division of Cardiology, Emory University School of Medicine, 1750 Haygood Drive, Atlanta, GA, N22030322, USA
| | - Richard D Wainford
- Department of Pharmacology & Experimental Therapeutics and the Whitaker Cardiovascular Institute, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA.
- Division of Cardiology, Emory University School of Medicine, 1750 Haygood Drive, Atlanta, GA, N22030322, USA.
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Iwhiwhu SA, Kumar R, Khan AH, Afolabi JM, Williams JD, de la Cruz JE, Adebiyi A. A low-dose pemetrexed-cisplatin combination regimen induces significant nephrotoxicity in mice. BMC Nephrol 2024; 25:370. [PMID: 39434019 PMCID: PMC11494951 DOI: 10.1186/s12882-024-03822-5] [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: 07/15/2024] [Accepted: 10/14/2024] [Indexed: 10/23/2024] Open
Abstract
BACKGROUND Pemetrexed is combined with cisplatin to treat cancer. Whether pemetrexed-cisplatin combination chemotherapy exacerbates cisplatin nephrotoxicity is unclear. Here, we investigated kidney injury in mice administered a non-lethal low-dose regimen of pemetrexed or cisplatin alone and compared it with a pemetrexed-cisplatin combination. METHODS Mice were randomly divided into four groups and administered intraperitoneally the experimental drugs solubilized in captisol (sulfobutylether β-cyclodextrin). Group 1 received captisol, Group 2 pemetrexed (10 mg/kg), Group 3 cisplatin (1 mg/kg), and Group 4 pemetrexed (10 mg/kg) plus cisplatin (1 mg/kg). The mice were treated every other day for two weeks, three times per week. Glomerular filtration rate (GFR) was determined on the third day after the last treatment, followed by a necropsy. RESULTS Whereas the relative kidney weight was comparable in the control vs. pemetrexed or cisplatin alone group, it was significantly increased in the combination group. Mice treated with cisplatin and pemetrexed-cisplatin combination exhibited reduced GFR. The pemetrexed-cisplatin combination caused significant increases in the plasma or urinary levels of kidney injury biomarkers, renal lipid peroxidation, and nitrosative stress compared with pemetrexed or cisplatin alone. Histopathology revealed that pemetrexed or cisplatin alone had minimal effects on the kidneys. By contrast, the pemetrexed-cisplatin combination caused tubular degeneration, dilatation, and granular casts. Live-cell imaging showed that the pemetrexed-cisplatin combination caused more severe apoptosis of primary renal epithelial cells than individual concentrations. CONCLUSIONS These findings suggest that combining pemetrexed and cisplatin causes oxidative kidney damage at individual doses that do not cause significant nephrotoxicity. Hence, the renal function of patients undergoing treatment with the pemetrexed-cisplatin combination needs extensive monitoring.
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Affiliation(s)
- Samson A Iwhiwhu
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Ravi Kumar
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, USA
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri Columbia, MO, 65211, USA
| | - Abdul H Khan
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, USA
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri Columbia, MO, 65211, USA
- Department of Anesthesiology and Perioperative Medicine, University of Missouri, Columbia, MO, USA
| | - Jeremiah M Afolabi
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Jada D Williams
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, USA
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri Columbia, MO, 65211, USA
| | - Julia E de la Cruz
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, USA
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri Columbia, MO, 65211, USA
| | - Adebowale Adebiyi
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, USA.
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri Columbia, MO, 65211, USA.
- NextGen Precision Health, University of Missouri, Columbia, MO, USA.
- Department of Anesthesiology and Perioperative Medicine, University of Missouri, Columbia, MO, USA.
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3
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Tuttle M, Levey AS. Relmapirazin, a new exogenous filtration marker, and more widespread use of measured GFR. Kidney Int 2024; 106:562-565. [PMID: 39304270 DOI: 10.1016/j.kint.2024.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Accepted: 07/11/2024] [Indexed: 09/22/2024]
Abstract
Plasma or urinary clearance of exogenous filtration markers is required for assessment of measured glomerular filtration rate. Although multiple methods are available, none is widely used because of their complexity, each has measurement error, and standardization is limited. Recently, a study validated the plasma clearance of a new exogenous filtration marker, relmapirazin, which can be detected by its transdermal fluorescence, potentially simplifying the procedure and increasing access to measured glomerular filtration rate.
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Affiliation(s)
- Marcelle Tuttle
- Division of Nephrology, Tufts Medical Center, Boston, Massachusetts, USA
| | - Andrew S Levey
- Division of Nephrology, Tufts Medical Center, Boston, Massachusetts, USA.
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4
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Xin Y, Liu Y, Liu L, Wang X, Wang D, Song Y, Shen L, Liu Y, Liu Y, Peng Y, Wang X, Zhou Y, Li H, Zhou Y, Huang P, Yuan M, Xiao Y, Yu K, Wang C. Dynamic changes in the real-time glomerular filtration rate and kidney injury markers in different acute kidney injury models. J Transl Med 2024; 22:857. [PMID: 39334187 PMCID: PMC11430329 DOI: 10.1186/s12967-024-05667-w] [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: 03/07/2024] [Accepted: 09/09/2024] [Indexed: 09/30/2024] Open
Abstract
In this study, we dynamically monitored the glomerular filtration rate and other assessment of renal function and markers of injury in various mice models of acute kidney injury. Male C57BL/6 mice were utilized to establish acute kidney injury models of sepsis, ischemia reperfusion, cisplatin, folic acid, aristolochic acid and antibiotic. In addition to the real time glomerular filtration rate, renal LCN-2 and HAVCR-1 mRNA expression levels, and serum creatinine, urea nitrogen and cystatin c levels were also used to evaluate renal function. In addition, the protein levels of LCN-2 and HAVCR-1 in renal, serum and urine were measured. Our results demonstrated that the changes in biomarkers always lagged the real time glomerular filtration rate during the progression and recovery of renal injury. Cystatin-c can reflect renal injury earlier than other markers, but it remains higher in the recovery stage. Perhaps the glomerular filtration rate does not reflect the greater injury caused by vancomycin plus piperacillin.
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Affiliation(s)
- Yu Xin
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Yanqi Liu
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Linqiong Liu
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Department of Critical Care Medicine, the Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150001, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Xinran Wang
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Dawei Wang
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, No. 150 Haping Rd, Nangang District, Harbin, 150081, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Yuchen Song
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Lifeng Shen
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Yuxi Liu
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Department of Critical Care Medicine, the Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150001, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Yuhan Liu
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Yahui Peng
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Xibo Wang
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Yang Zhou
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Hongxu Li
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Yuxin Zhou
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Pengfei Huang
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Mengyao Yuan
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Yu Xiao
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China
| | - Kaijiang Yu
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China.
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China.
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China.
| | - Changsong Wang
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150007, China.
- Central Laboratory of The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China.
- Heilongjiang provincial key laboratory of critical care medicine, Harbin, Heilongjiang Province, China.
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Chang J, Pais GM, Barreto EF, Young B, Scott H, Schwartz Z, Cartwright C, Jubrail R, Srivastava A, Scheetz MH. Past, Present, and Future Biomarkers of Kidney Function and Injury: The Relationship With Antibiotics. Int J Antimicrob Agents 2024; 64:107332. [PMID: 39245327 DOI: 10.1016/j.ijantimicag.2024.107332] [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: 05/08/2024] [Revised: 08/27/2024] [Accepted: 09/02/2024] [Indexed: 09/10/2024]
Abstract
Routinely used kidney biomarkers of injury and function such as serum creatinine and urine albumin to creatinine ratio, are neither sensitive nor specific. Future biomarkers are being developed for clinical use and have already been included in guidance from groups such as the U.S. Food and Drug Administration and the Predictive Safety Testing Consortium. These biomarkers have important implications for early identification of kidney injury and more accurate measurement of kidney function. Many antibiotics are either eliminated by the kidney or can cause clinically significant nephrotoxicity. As a result, clinicians should be familiar with new biomarkers of kidney function and injury, their place in clinical practice, and applications for antibiotic dosing.
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Affiliation(s)
- Jack Chang
- Department of Pharmacy Practice (J.C., G.M.P., R.J., M.H.S.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA; Pharmacometrics Center of Excellence (J.C., G.M.P., M.H.S.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA; Department of Pharmacy (J.C., M.H.S.), Northwestern Memorial Hospital, Chicago, Illinois, USA
| | - Gwendolyn M Pais
- Department of Pharmacy Practice (J.C., G.M.P., R.J., M.H.S.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA; Pharmacometrics Center of Excellence (J.C., G.M.P., M.H.S.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA
| | - Erin F Barreto
- Department of Pharmacy (E.F.B.), Mayo Clinic, Rochester, Minnesota, USA
| | - Bryce Young
- Chicago College of Osteopathic Medicine (B.Y., H.S., Z.S., C.C.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA
| | - Haley Scott
- Chicago College of Osteopathic Medicine (B.Y., H.S., Z.S., C.C.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA
| | - Zachary Schwartz
- Chicago College of Osteopathic Medicine (B.Y., H.S., Z.S., C.C.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA
| | - Collin Cartwright
- Chicago College of Osteopathic Medicine (B.Y., H.S., Z.S., C.C.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA
| | - Raymond Jubrail
- Department of Pharmacy Practice (J.C., G.M.P., R.J., M.H.S.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA
| | - Anand Srivastava
- Division of Nephrology (A.S.), University of Illinois-Chicago, Chicago, Illinois, USA
| | - Marc H Scheetz
- Department of Pharmacy Practice (J.C., G.M.P., R.J., M.H.S.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA; Pharmacometrics Center of Excellence (J.C., G.M.P., M.H.S.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA; Department of Pharmacy (J.C., M.H.S.), Northwestern Memorial Hospital, Chicago, Illinois, USA; Department of Pharmacology (M.H.S.), Midwestern University-Downers Grove Campus, Downers Grove, Illinois, USA.
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6
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Peters AM. The physiological basis of renal nuclear medicine. Nucl Med Commun 2024; 45:745-757. [PMID: 38903047 DOI: 10.1097/mnm.0000000000001872] [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: 06/22/2024]
Abstract
Renal physiology underpins renal nuclear medicine, both academic and clinical. Clearance, an important concept in renal physiology, comprises tissue uptake rate of tracer (tissue clearance), disappearance rate from plasma (plasma clearance), appearance rate in urine (urinary clearance) and disappearance rate from tissue. In clinical research, steady-state plasma clearances of para-amino-hippurate and inulin have been widely used to measure renal blood flow (RBF) and glomerular filtration rate (GFR), respectively. Routinely, GFR is measured at non-steady state as plasma clearance of a filtration agent, such as technetium-99m diethylenetriaminepentaacetic acid. Scaled to three-dimensional whole body metrics rather than body surface area, GFR in women is higher than in men but declines faster with age. Age-related decline is predominantly from nephron loss. Tubular function determines parenchymal transit time, which is important in renography, and the route of uptake of technetium-99m dimercaptosuccinic acid, which is via filtration. Resistance to flow is defined according to the pressure-flow relationship but in renography, only transit time can be measured, which, being equal to urine flow divided by collecting system volume, introduces further uncertainty because the volume is also unmeasurable. Tubuloglomerular feedback governs RBF and GFR, is regulated by the macula densa, mediated by adenosine and renin, and can be manipulated with proximal tubular sodium-glucose cotransporter-2 inhibitors. Other determinants of renal haemodynamics include prostaglandins, nitric oxide and dopamine, while protein meal and amino acid infusion are used to measure renal functional reserve. In conclusion, for measuring renal responses to exogenous agents, steady-state para-amino-hippurate and inulin clearances should be replaced with rubidium-82 and gallium-68 EDTA for measuring RBF and GFR.
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Opurum PC, Decker ST, Stuart D, Peterlin AD, Paula VL, Siripoksup P, Drummond MJ, Sanchez A, Ramkumar N, Funai K. Six months of physical inactivity is insufficient to cause chronic kidney disease in C57BL/6J mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.29.610415. [PMID: 39257785 PMCID: PMC11384017 DOI: 10.1101/2024.08.29.610415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
Chronic kidney disease (CKD) is a progressive disorder marked by a decline in kidney function. Obesity and sedentary behavior contribute to the development of CKD, though mechanisms by which this occurs are poorly understood. This knowledge gap is worsened by the lack of a reliable murine CKD model that does not rely on injury, toxin, or gene deletion to induce a reduction in kidney function. High-fat diet (HFD) feeding alone is insufficient to cause reduced kidney function until later in life. Here, we employed a small mouse cage (SMC), a recently developed mouse model of sedentariness, to study its effect on kidney function. Wildtype C57BL/6J male mice were housed in sham or SMC housing for six months with HFD in room (22°C) or thermoneutral (30°C) conditions. Despite hyperinsulinemia induced by the SMC+HFD intervention, kidneys from these mice displayed normal glomerular filtration rate (GFR). However, the kidneys showed early signs of kidney injury, including increases in Col1a1 and NGAL transcripts, as well as fibrosis by histology, primarily in the inner medullary/papilla region. High-resolution respirometry and fluorometry experiments showed no statistically significant changes in the capacities for respiration, ATP synthesis, or electron leak. These data confirm the technical challenge in modeling human CKD. They further support the notion that obesity and a sedentary lifestyle make the kidneys more vulnerable, but additional insults are likely required for the pathogenesis of CKD.
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Affiliation(s)
- Precious C. Opurum
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA
| | - Stephen T. Decker
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
| | - Deborah Stuart
- Division of Nephrology & Hypertension, School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Alek D. Peterlin
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA
| | - Venisia L. Paula
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA
| | - Piyarat Siripoksup
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA
- Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Micah J. Drummond
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA
- Division of Nephrology & Hypertension, School of Medicine, University of Utah, Salt Lake City, Utah, USA
- Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Alejandro Sanchez
- Division of Urology, Department of Surgery, University of Utah School of Medicine, Salt Lake City, Utah, USA
- Huntsman Cancer Institute, Cancer Hospital, Salt Lake City, Utah, USA
| | - Nirupama Ramkumar
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA
- Division of Nephrology & Hypertension, School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Katsuhiko Funai
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
- Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, Utah, USA
- Huntsman Cancer Institute, Cancer Hospital, Salt Lake City, Utah, USA
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8
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Imenez Silva PH, Pepin M, Figurek A, Gutiérrez-Jiménez E, Bobot M, Iervolino A, Mattace-Raso F, Hoorn EJ, Bailey MA, Hénaut L, Nielsen R, Frische S, Trepiccione F, Hafez G, Altunkaynak HO, Endlich N, Unwin R, Capasso G, Pesic V, Massy Z, Wagner CA. Animal models to study cognitive impairment of chronic kidney disease. Am J Physiol Renal Physiol 2024; 326:F894-F916. [PMID: 38634137 DOI: 10.1152/ajprenal.00338.2023] [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: 10/19/2023] [Revised: 03/11/2024] [Accepted: 04/04/2024] [Indexed: 04/19/2024] Open
Abstract
Mild cognitive impairment (MCI) is common in people with chronic kidney disease (CKD), and its prevalence increases with progressive loss of kidney function. MCI is characterized by a decline in cognitive performance greater than expected for an individual age and education level but with minimal impairment of instrumental activities of daily living. Deterioration can affect one or several cognitive domains (attention, memory, executive functions, language, and perceptual motor or social cognition). Given the increasing prevalence of kidney disease, more and more people with CKD will also develop MCI causing an enormous disease burden for these individuals, their relatives, and society. However, the underlying pathomechanisms are poorly understood, and current therapies mostly aim at supporting patients in their daily lives. This illustrates the urgent need to elucidate the pathogenesis and potential therapeutic targets and test novel therapies in appropriate preclinical models. Here, we will outline the necessary criteria for experimental modeling of cognitive disorders in CKD. We discuss the use of mice, rats, and zebrafish as model systems and present valuable techniques through which kidney function and cognitive impairment can be assessed in this setting. Our objective is to enable researchers to overcome hurdles and accelerate preclinical research aimed at improving the therapy of people with CKD and MCI.
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Affiliation(s)
- Pedro H Imenez Silva
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, University Medical Center, Rotterdam, The Netherlands
| | - Marion Pepin
- Institut National de la Santé et de la Recherche Médicale U-1018 Centre de Recherche en Épidémiologie et Santé des Population, Équipe 5, Paris-Saclay University, Versailles Saint-Quentin-en-Yvelines University, Villejuif, France
- Department of Geriatrics, Centre Hospitalier Universitaire Ambroise Paré, Assistance Publique-Hôpitaux de Paris Université Paris-Saclay, Paris, France
| | - Andreja Figurek
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Eugenio Gutiérrez-Jiménez
- Center for Functionally Integrative Neuroscience, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Mickaël Bobot
- Centre de Néphrologie et Transplantation Rénale, Hôpital de la Conception, Assistance Publique-Hopitaux de Marseille, and INSERM 1263, Institut National de la Recherche Agronomique 1260, C2VN, Aix-Marseille Universitaire, Marseille, France
| | - Anna Iervolino
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli,' Naples, Italy
| | - Francesco Mattace-Raso
- Division of Geriatrics, Department of Internal Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Ewout J Hoorn
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, University Medical Center, Rotterdam, The Netherlands
| | - Matthew A Bailey
- Edinburgh Kidney, Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh, United Kingdom
| | - Lucie Hénaut
- UR UPJV 7517, Jules Verne University of Picardie, Amiens, France
| | - Rikke Nielsen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | - Francesco Trepiccione
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli,' Naples, Italy
| | - Gaye Hafez
- Department of Pharmacology, Faculty of Pharmacy, Altinbas University, Istanbul, Turkey
| | - Hande O Altunkaynak
- Department of Pharmacology, Gulhane Faculty of Pharmacy, University of Health Sciences, Istanbul, Turkey
| | - Nicole Endlich
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Robert Unwin
- Department of Renal Medicine, Royal Free Hospital, University College London, London, United Kingdom
| | - Giovambattista Capasso
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli,' Naples, Italy
- Biogem Research Institute, Ariano Irpino, Italy
| | - Vesna Pesic
- Department of Physiology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Ziad Massy
- Centre for Research in Epidemiology and Population Health, INSERM UMRS 1018, Clinical Epidemiology Team, University Paris-Saclay, University Versailles-Saint Quentin, Villejuif, France
- Department of Nephrology, Centre Hospitalier Universitaire Ambroise Paré, Assistance Publique-Hôpitaux de Paris Université Paris-Saclay, Paris, France
| | - Carsten A Wagner
- Institute of Physiology, University of Zurich, Zurich, Switzerland
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9
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Pieters TT, Besseling PJ, Bovée DM, Rookmaaker MB, Verhaar MC, Yard B, Hoorn EJ, Joles JA. Discrepancies between transcutaneous and estimated glomerular filtration rates in rats with chronic kidney disease. Kidney Int 2024; 105:1212-1220. [PMID: 38514000 DOI: 10.1016/j.kint.2024.02.020] [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: 06/05/2023] [Revised: 02/03/2024] [Accepted: 02/12/2024] [Indexed: 03/23/2024]
Abstract
Accurate assessment of the glomerular filtration rate (GFR) is crucial for researching kidney disease in rats. Although validation of methods that assess GFR is crucial, large-scale comparisons between different methods are lacking. Both transcutaneous GFR (tGFR) and a newly developed estimated GFR (eGFR) equation by our group provide a low-invasive approach enabling repeated measurements. The tGFR is a single bolus method using FITC-labeled sinistrin to measure GFR based on half-life of the transcutaneous signal, whilst the eGFR is based on urinary sinistrin clearance. Here, we retrospectively compared tGFR, using both 1- and 3- compartment models (tGFR_1c and tGFR_3c, respectively) to the eGFR in a historic cohort of 43 healthy male rats and 84 male rats with various models of chronic kidney disease. The eGFR was on average considerably lower than tGFR-1c and tGFR-3c (mean differences 855 and 216 μL/min, respectively) and only 20 and 47% of measurements were within 30% of each other, respectively. The relative difference between eGFR and tGFR was highest in rats with the lowest GFR. Possible explanations for the divergence are problems inherent to tGFR, such as technical issues with signal measurement, description of the signal kinetics, and translation of half-life to tGFR, which depends on distribution volume. The unknown impact of isoflurane anesthesia used in determining mGFR remains a limiting factor. Thus, our study shows that there is a severe disagreement between GFR measured by tGFR and eGFR, stressing the need for more rigorous validation of the tGFR and possible adjustments to the underlying technique.
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Affiliation(s)
- Tobias T Pieters
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Paul J Besseling
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Dominique M Bovée
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Maarten B Rookmaaker
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marianne C Verhaar
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Benito Yard
- Department of Medicine, University Hospital Mannheim, University of Heidelberg, Mannheim, Germany
| | - Ewout J Hoorn
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Jaap A Joles
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands.
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10
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Zhong Z, Zhang Y, Wei Y, Li X, Ren L, Li Y, Zhang X, Chen C, Yin X, Liu R, Wang Q. Fucoidan Improves Early Stage Diabetic Nephropathy via the Gut Microbiota-Mitochondria Axis in High-Fat Diet-Induced Diabetic Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:9755-9767. [PMID: 38635872 DOI: 10.1021/acs.jafc.3c08503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Diabetic nephropathy (DN) is a common microvascular complication of diabetes. Fucoidan, a polysaccharide containing fucose and sulfate group, ameliorates DN. However, the underlying mechanism has not been fully understood. This study aimed to explore the effects and mechanism of fucoidan on DN in high-fat diet-induced diabetic mice. A total of 90 C57BL/6J mice were randomly assigned to six groups (n = 15) as follows: normal control (NC), diabetes mellitus (DM), metformin (MTF), low-dose fucoidan (LFC), medium-dose fucoidan (MFC), and high-dose fucoidan (HFC). A technique based on fluorescein isothiocyanate (FITC-sinistin) elimination kinetics measured percutaneously was applied to determine the glomerular filtration rate (GFR). After 24 weeks, the mice were sacrificed and an early stage DN model was confirmed by GFR hyperfiltration, elevated urinary creatinine, normal urinary albumin, tubulointerstitial fibrosis, and glomerular hypertrophy. Fucoidan significantly improved the GFR hyperfiltration and renal fibrosis. An enriched SCFAs-producing bacteria and increased acetic concentration in cecum contents were found in fucoidan groups, as well as increased renal ATP levels and improved mitochondrial dysfunction. The renal inflammation and fibrosis were ameliorated through inhibiting the MAPKs pathway. In conclusion, fucoidan improved early stage DN targeting the microbiota-mitochondria axis by ameliorating mitochondrial oxidative stress and inhibiting the MAPKs pathway.
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Affiliation(s)
- Zhaoyi Zhong
- School of Public health, Qingdao University, Qingdao 266071, China
- . Hedong District Center for Disease Control and Prevention, Tianjin 300171, China
| | - Yangting Zhang
- School of Public health, Qingdao University, Qingdao 266071, China
- Institute of Nutrition & Health, Qingdao University, Qingdao 266071, China
| | - Yuan Wei
- . Qingdao Eighth People's Hospital, Qingdao 266041, China
| | - Xiaona Li
- School of Public health, Qingdao University, Qingdao 266071, China
- Institute of Nutrition & Health, Qingdao University, Qingdao 266071, China
| | - Lisheng Ren
- . The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Yan Li
- School of Public health, Qingdao University, Qingdao 266071, China
- Institute of Nutrition & Health, Qingdao University, Qingdao 266071, China
| | - Xueqian Zhang
- School of Public health, Qingdao University, Qingdao 266071, China
- Institute of Nutrition & Health, Qingdao University, Qingdao 266071, China
| | - Chengyu Chen
- School of Public health, Qingdao University, Qingdao 266071, China
| | - Xueru Yin
- School of Public health, Qingdao University, Qingdao 266071, China
| | - Run Liu
- School of Public health, Qingdao University, Qingdao 266071, China
- Institute of Nutrition & Health, Qingdao University, Qingdao 266071, China
| | - Qiuzhen Wang
- School of Public health, Qingdao University, Qingdao 266071, China
- Institute of Nutrition & Health, Qingdao University, Qingdao 266071, China
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11
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Madison J, Wilhelm K, Meehan DT, Gratton MA, Vosik D, Samuelson G, Ott M, Fascianella J, Nelson N, Cosgrove D. Ramipril therapy in integrin α1-null, autosomal recessive Alport mice triples lifespan: mechanistic clues from RNA-seq analysis. J Pathol 2024; 262:296-309. [PMID: 38129319 PMCID: PMC10872630 DOI: 10.1002/path.6231] [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: 02/09/2023] [Revised: 10/10/2023] [Accepted: 10/29/2023] [Indexed: 12/23/2023]
Abstract
The standard of care for patients with Alport syndrome (AS) is angiotensin-converting enzyme (ACE) inhibitors. In autosomal recessive Alport (ARAS) mice, ACE inhibitors double lifespan. We previously showed that deletion of Itga1 in Alport mice [double-knockout (DKO) mice] increased lifespan by 50%. This effect seemed dependent on the prevention of laminin 211-mediated podocyte injury. Here, we treated DKO mice with vehicle or ramipril starting at 4 weeks of age. Proteinuria and glomerular filtration rates were measured at 5-week intervals. Glomeruli were analyzed for laminin 211 deposition in the glomerular basement membrane (GBM) and GBM ultrastructure was analyzed using transmission electron microscopy (TEM). RNA sequencing (RNA-seq) was performed on isolated glomeruli at all time points and the results were compared with cultured podocytes overlaid (or not) with recombinant laminin 211. Glomerular filtration rate declined in ramipril-treated DKO mice between 30 and 35 weeks. Proteinuria followed these same patterns with normalization of foot process architecture in ramipril-treated DKO mice. RNA-seq revealed a decline in the expression of Foxc2, nephrin (Nphs1), and podocin (Nphs2) mRNAs, which was delayed in the ramipril-treated DKO mice. GBM accumulation of laminin 211 was delayed in ramipril-treated DKO mice, likely due to a role for α1β1 integrin in CDC42 activation in Alport mesangial cells, which is required for mesangial filopodial invasion of the subendothelial spaces of the glomerular capillary loops. Ramipril synergized with Itga1 knockout, tripling lifespan compared with untreated ARAS mice. © 2023 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Jacob Madison
- Boys Town National Research Hospital, Omaha, NE, USA
| | - Kevin Wilhelm
- Boys Town National Research Hospital, Omaha, NE, USA
| | | | | | - Denise Vosik
- Boys Town National Research Hospital, Omaha, NE, USA
| | | | - Megan Ott
- Boys Town National Research Hospital, Omaha, NE, USA
| | | | - Noa Nelson
- Boys Town National Research Hospital, Omaha, NE, USA
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12
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Pang L, Liang N, Li C, Merriman TR, Zhang H, Yan F, Sun W, Li R, Xue X, Liu Z, Wang C, Cheng X, Chen S, Yin H, Dalbeth N, Yuan X. A stable liver-specific urate oxidase gene knockout hyperuricemia mouse model finds activated hepatic de novo purine biosynthesis and urate nephropathy. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167009. [PMID: 38237409 DOI: 10.1016/j.bbadis.2023.167009] [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: 05/11/2023] [Revised: 12/25/2023] [Accepted: 12/26/2023] [Indexed: 02/20/2024]
Abstract
Urate oxidase (Uox)-deficient mice could be an optimal animal model to study hyperuricemia and associated disorders. We develop a liver-specific conditional knockout Uox-deficient (UoxCKO) mouse using the Cre/loxP gene targeting system. These UoxCKO mice spontaneously developed hyperuricemia with accumulated serum urate metabolites. Blocking urate degradation, the UoxCKO mice showed significant de novo purine biosynthesis (DNPB) in the liver along with amidophosphoribosyltransferase (Ppat). Pegloticase and allopurinol reversed the elevated serum urate (SU) levels in UoxCKO mice and suppressed the Ppat up-regulation. Although urate nephropathy occurred in 30-week-old UoxCKO mice, 90 % of Uox-deficient mice had a normal lifespan without pronounced urate transport abnormality. Thus, UoxCKO mice are a stable model of human hyperuricemia. Activated DNPB in the UoxCKO mice provides new insights into hyperuricemia, suggesting increased SU influences purine synthesis.
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Affiliation(s)
- Lei Pang
- Institute of Metabolic Diseases, Qingdao University, Qingdao, China; Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Ningning Liang
- CAS Key Laboratory of Nutrition, Metabolism, and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China
| | - Changgui Li
- Institute of Metabolic Diseases, Qingdao University, Qingdao, China; Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Tony R Merriman
- Division of Clinical Immunology and Rheumatology, University of Alabama at Birmingham, AL, United States
| | - Hui Zhang
- Institute of Metabolic Diseases, Qingdao University, Qingdao, China
| | - Fei Yan
- Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Wenyan Sun
- Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Rui Li
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Xiaomei Xue
- Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Zhen Liu
- Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Can Wang
- Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xiaoyu Cheng
- Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shiting Chen
- CAS Key Laboratory of Nutrition, Metabolism, and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China
| | - Huiyong Yin
- CAS Key Laboratory of Nutrition, Metabolism, and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai, China, University of Chinese Academy of Sciences, Beijing, China; School of Life Science and Technology, ShanghaiTech University, Shanghai, China; Department of Biomedical Sciences, Jockey Club College of Veterinary Medicine and Medicine, State Key Laboratory of Marine Pollution (SKLMP), The Shenzhen Research Institute, City University of Hong Kong, Hong Kong, China.
| | - Nicola Dalbeth
- Department of Medicine, University of Auckland, Auckland, New Zealand.
| | - Xuan Yuan
- Institute of Metabolic Diseases, Qingdao University, Qingdao, China; Shandong Provincial Key Laboratory of Metabolic Diseases, Qingdao Key Laboratory of Gout, the Affiliated Hospital of Qingdao University, Qingdao, China.
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13
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Mallet J, Billiet PA, Scarton M, Benichou N, Bobot M, Chaibi K, Hertig A, Hadchouel J, Dreyfuss D, Gaudry S, Placier S. A model of hemodialysis after acute kidney injury in rats. Intensive Care Med Exp 2023; 11:97. [PMID: 38117344 PMCID: PMC10733261 DOI: 10.1186/s40635-023-00583-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 12/12/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND Acute kidney injury (AKI) is frequent among critically ill patients. Renal replacement therapy (RRT) is often required to deal with severe complications of AKI. This technique is however associated with side effects such as hemodynamic instability and delayed renal recovery. In this study, we aimed to describe a novel model of hemodialysis in rats with AKI and depict a dialysis membrane performance. METHODS Eighteen Sprague-Dawley rats received 0.75% adenine-rich diet to induce AKI. After 2 weeks, nine underwent an arterio-venous extracorporeal circulation (ECC) (ECC group) for 2 h without a dialysis membrane on the circuit and nine received a hemodialysis session (HD group) for 2 h with an ECC circuit. All rats were hemodynamically monitored, and glomerular filtration rate (GFR) was measured by transcutaneous fluorescence after the injection of FITC-Sinistrin. Blood samples were collected at different time points to assess serum creatinine and serum urea concentrations and to determine the Kt/V. Sinistrin concentration was also quantified in both plasma and dialysis effluent. RESULTS After 2 weeks of adenine-rich diet, rats exhibited a decrease in GFR. Both serum urea and serum creatinine concentrations increased in the ECC group but remained stable in the HD group. We found no significant difference in serum creatinine and serum urea concentrations between groups. At the end of experiments, mean serum urea was 36.7 mmol/l (95%CI 19.7-46.9 mmol/l) and 23.6 mmol/l (95%CI 15.2-33.5 mmol/l) in the ECC and HD groups, respectively (p = 0.15), and mean serum creatinine concentration was 158.0 µmol/l (95%CI 108.1-191.9 µmol/l) and 114.0 µmol/l (95%CI 90.2-140.9 µmol/l) in the ECC and HD groups, respectively (p = 0.11). The Kt/V of the model was estimated at 0.23. Sinistrin quantity in the ultrafiltrate raised steadily during the dialysis session. After 2 h, the median quantity was 149.2 µg (95% CI 99.7-250.3 µg). CONCLUSIONS This hemodialysis model is an acceptable compromise between the requirement of hemodynamic tolerance which implies reducing extracorporeal blood volume (using a small dialyzer) and the demonstration that diffusion of molecules through the membrane is achieved.
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Affiliation(s)
- J Mallet
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
- Intensive Care Unit, Service de Réanimation Médico-Chirurgicale, AP-HP, Hôpital Avicenne, 125 Rue de Stalingrad, 93000, Bobigny, France
| | - P-A Billiet
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
- Service de Médecine Intensive Réanimation, Hôpital Henri Mondor, Assistance Publique Hôpitaux de Paris, Créteil, France
| | - M Scarton
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
- Service de Médecine Intensive Réanimation, Hôpital Louis Mourier, Assistance Publique, Colombes, France
| | - N Benichou
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
- Service de Néphrologie, Hôpital Européen Georges Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - M Bobot
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
- Centre de Néphrologie et Transplantation Rénale, Hôpital de la Conception, Assistance Publique Hôpitaux de Marseille, Marseille, France
- Aix Marseille Univ, INSERM 1632, INRAE 1260, C2VN, CERIMED, Marseille, France
| | - K Chaibi
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
- Intensive Care Unit, Service de Réanimation Médico-Chirurgicale, AP-HP, Hôpital Avicenne, 125 Rue de Stalingrad, 93000, Bobigny, France
| | - A Hertig
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
| | - J Hadchouel
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
| | - D Dreyfuss
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
- Service de Médecine Intensive Réanimation, Hôpital Louis Mourier, Assistance Publique, Colombes, France
- Université de Paris, Paris, France
| | - S Gaudry
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France.
- Intensive Care Unit, Service de Réanimation Médico-Chirurgicale, AP-HP, Hôpital Avicenne, 125 Rue de Stalingrad, 93000, Bobigny, France.
- Health Care Simulation Center, UFR SMBH, Université Sorbonne Paris Nord, Bobigny, France.
| | - S Placier
- French National Institute of Health and Medical Research (INSERM), UMR_S1155, CORAKID, Hôpital Tenon, Sorbonne Université, 75020, Paris, France
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14
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Taylor KM, Au AYM, Herath S, Succar L, Wong J, Erlich JH, Endre ZH. Kidney functional reserve and damage biomarkers in subclinical chronic kidney disease and acute kidney injury. Am J Physiol Renal Physiol 2023; 325:F888-F898. [PMID: 37733876 DOI: 10.1152/ajprenal.00133.2023] [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: 05/19/2023] [Revised: 09/01/2023] [Accepted: 09/15/2023] [Indexed: 09/23/2023] Open
Abstract
Significant loss of kidney function is not easily identified by serum creatinine (sCr)-based measurements. In the presence of normal sCr, decreased kidney functional reserve (KFR) may identify a significant loss of function. We evaluated KFR in experimental subclinical chronic kidney disease (sCKD) before and after brief ischemia-reperfusion injury (IRI). Using fluorescein isothiocyanate-labeled sinistrin, glomerular filtration rate (GFR) was measured transcutaneously before and after adenine-induced sCKD, and 1 and 2 wk after brief IRI, and compared with urinary kidney damage biomarkers. sCKD reduced stimulated and unstimulated GFR by ∼20% while reducing KFR by 50%. IRI reduced unstimulated GFR for 14 days, but KFR remained relatively unchanged in sCKD and transiently increased in control kidneys at 7 days. sCr increased and creatinine clearance (CrCl) decreased only immediately after IRI; sCr and CrCl correlated poorly with measured GFR except on day 1 after IRI. Heterogeneity in sCr and CrCl resulted from variation in tubular creatinine secretion. The increase in damage biomarker concentrations persisted for up to 14 days after IRI, allowing retrospective detection of sCKD before AKI by urine clusterin/urine kidney injury molecule-1 with an area under the curve of 1.0. sCr and CrCl are unreliable unless sCr is acutely elevated. Measurement of KFR and urine damage biomarker excretion detected sCKD despite normal sCr and CrCl. After IRI, the urine clusterin-to-urine kidney injury molecule-1 ratio may identify prior sCKD.NEW & NOTEWORTHY Early kidney function loss is poorly identified by serum creatinine (sCr)-based measurements. Direct kidney functional reserve (KFR) measurement before kidney injury and elevated urinary biomarkers clusterin and kidney injury molecule-1 detect subclinical chronic kidney disease (sCKD) after kidney injury despite normal range sCr and creatinine clearance. Reliance on sCr masks underlying sCKD. Acute kidney injury risk evaluation requires direct glomerular filtration rate measurement and KFR, whereas kidney damage biomarkers facilitate identification of prior subclinical injury.
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Affiliation(s)
- Kylie M Taylor
- Faculty of Medicine and Health, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Amy Y M Au
- Faculty of Medicine and Health, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
- Department of Nephrology, Prince of Wales Hospital, Sydney, New South Wales, Australia
| | - Sanjeeva Herath
- Faculty of Medicine and Health, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Lena Succar
- Faculty of Medicine and Health, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Jasmine Wong
- Department of Nephrology, Prince of Wales Hospital, Sydney, New South Wales, Australia
| | - Jonathan H Erlich
- Faculty of Medicine and Health, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
- Department of Nephrology, Prince of Wales Hospital, Sydney, New South Wales, Australia
| | - Zoltán H Endre
- Faculty of Medicine and Health, School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
- Department of Nephrology, Prince of Wales Hospital, Sydney, New South Wales, Australia
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15
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Hettler SA, Picascia T, Pastene DO, Vajpayee S, Perciaccante R, Yard BA, Gretz N, Krämer BK. Hyperfiltration can be detected by transcutaneous assessment of glomerular filtration rate in diabetic obese mice. Am J Physiol Cell Physiol 2023; 325:C1558-C1566. [PMID: 37955125 DOI: 10.1152/ajpcell.00483.2022] [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: 10/31/2022] [Revised: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 11/14/2023]
Abstract
We addressed if hyperfiltration can be assessed transcutaneously in male diabetic obese mice (BTBRob/ob) at 12 and 24 wk and how this relates to glomerular parameters indicative for hyperfiltration. Transcutaneous assessment of FITC-Sinistrin clearance [transcutaneous assessment of glomerular filtration rate (tGFR)] was compared against classical plasma clearance. Kidney from SV620C-01-PEI perfused mice were harvested at 24 wk and processed for tissue clearing and classical histology. Perfusion patterns of glomerular capillaries, glomerular size, and vasodilation of the afferent arterioles were assessed. Although at 12 wk FITC-Sinistrin half-life (t1/2) for both tGFR and plasma clearance suggested hyperfiltration, this was not significant anymore at 24 wk. In kidneys of diabetic mice the diameter of the afferent arteriole was significantly larger and positively correlated with glomerular size. Glomerular perfusion pattern in these mice was heterogeneous ranging from non- to well-perfused glomeruli. Nonperfused glomerular areas displayed a strong periodic acid-Schiff's (PAS) positive staining. Collectively our data demonstrate that tGFR is a valid method to detect hyperfiltration. Hyperfiltration occurs early in BTBRob/ob mice and disappears with disease progression as a consequence of a reduced filtration surface. It remains to be assessed if tGFR is also a valid method in diabetic mice with severely compromised renal function.NEW & NOTEWORTHY tGFR measurement is a relatively new method to assess kidney function in conscious rodents, which can be repeated multiple times in the same animal to track the course of the disease and/or the effect of potential treatments. Since the literature was inconclusive on the suitability of this technique in obese mice, we validated it for the first time against classical plasma clearance in the commonly used BTBRob/ob mouse model.
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Affiliation(s)
- Steffen A Hettler
- Vth Medical Department, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Tiziana Picascia
- Medical Research Center, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Diego O Pastene
- V Medical Department, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | | | | | - Benito A Yard
- V Medical Department, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
- European Center for Angioscience, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Norbert Gretz
- Medical Research Center, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Bernhard K Krämer
- V Medical Department, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
- European Center for Angioscience, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
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16
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Teixido-Trujillo S, Luis-Lima S, López-Martínez M, Navarro-Díaz M, Díaz-Martín L, Escasany-Martínez E, Gaspari F, Rodríguez-Rodríguez AE. Measured GFR in murine animal models: review on methods, techniques, and procedures. Pflugers Arch 2023; 475:1241-1250. [PMID: 37552296 PMCID: PMC10567863 DOI: 10.1007/s00424-023-02841-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/10/2023] [Accepted: 07/11/2023] [Indexed: 08/09/2023]
Abstract
Chronic kidney disease (CKD) is one of the most common chronic diseases worldwide, with increasing rates of morbidity and mortality. Thus, early detection is essential to prevent severe adverse events and the progression of kidney disease to an end stage. Glomerular filtration rate (GFR) is the most appropriate index to evaluate renal function in both clinical practice and basic medical research. Several animal models have been developed to understand renal disease induction and progression. Specifically, murine models are useful to study the pathogenesis of renal damage, so a reliable determination of GFR is essential to evaluate the progression of CKD. However, as in clinical practise, the estimation of GFR in murine by levels of serum/urine creatinine or cystatin-C could not be accurate and needed other more reliable methods. As an alternative, the measurement of GFR by the clearance of exogenous markers like inulin, sinistrin, 51Cr-EDTA, 99mTc-DTPA, 125I-iothalamate, or iohexol could be performed. Nevertheless, both approaches-estimation or measurement of GFR-have their limitations and a standard method for the GFR determination has not been defined. Altogether, in this review, we aim to give an overview of the current methods for GFR assessment in murine models, describing each methodology and focusing on their advantages and limitations.
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Affiliation(s)
- Silvia Teixido-Trujillo
- Universidad de La Laguna, Faculty of Medicine, San Cristóbal de La Laguna, Spain
- Research Unit, Hospital Universitario de Canarias, San Cristóbal de La Laguna, Spain
| | - Sergio Luis-Lima
- Department of Laboratory Medicine, Complejo Hospitalario Universitario de Canarias, San Cristóbal de La Laguna, Spain
| | | | - Maruja Navarro-Díaz
- Department of Nephology, Hospital de Sant Joan Despí Moisès Broggi, Barcelona, Spain
| | - Laura Díaz-Martín
- Research Unit, Hospital Universitario de Canarias, San Cristóbal de La Laguna, Spain
- Instituto de Tecnologías Biomédicas (ITB), Universidad de la Laguna, San Cristóbal de La Laguna, Spain
| | - Elia Escasany-Martínez
- Lipobeta group. Departamento de Ciencias Básicas de la Salud, Facultad de Ciencias de la Salud, Universidad Rey Juan Carlos, Madrid, Spain
| | - Flavio Gaspari
- Instituto di Ricerche Farmacologiche Mario Negri (IRCCS), Clinical Research Center for Rare Diseases 'Aldo & Cele Daccò, Bergamo, Italy
| | - Ana Elena Rodríguez-Rodríguez
- Universidad de La Laguna, Faculty of Medicine, San Cristóbal de La Laguna, Spain.
- Research Unit, Hospital Universitario de Canarias, San Cristóbal de La Laguna, Spain.
- Instituto de Tecnologías Biomédicas (ITB), Universidad de la Laguna, San Cristóbal de La Laguna, Spain.
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Kious KW, Savage KA, Twohey SCE, Highum AF, Philipose A, Díaz HS, Del Rio R, Lang JA, Clayton SC, Marcus NJ. Chronic intermittent hypoxia promotes glomerular hyperfiltration and potentiates hypoxia-evoked decreases in renal perfusion and PO 2. Front Physiol 2023; 14:1235289. [PMID: 37485067 PMCID: PMC10358516 DOI: 10.3389/fphys.2023.1235289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 06/27/2023] [Indexed: 07/25/2023] Open
Abstract
Introduction: Sleep apnea (SA) is highly prevalent in patients with chronic kidney disease and may contribute to the development and/or progression of this condition. Previous studies suggest that dysregulation of renal hemodynamics and oxygen flux may play a key role in this process. The present study sought to determine how chronic intermittent hypoxia (CIH) associated with SA affects regulation of renal artery blood flow (RBF), renal microcirculatory perfusion (RP), glomerular filtration rate (GFR), and cortical and medullary tissue PO2 as well as expression of genes that could contribute to renal injury. We hypothesized that normoxic RBF and tissue PO2 would be reduced after CIH, but that GFR would be increased relative to baseline, and that RBF, RP, and tissue PO2 would be decreased to a greater extent in CIH vs. sham during exposure to intermittent asphyxia (IA, FiO2 0.10/FiCO2 0.03). Additionally, we hypothesized that gene programs promoting oxidative stress and fibrosis would be activated by CIH in renal tissue. Methods: All physiological variables were measured at baseline (FiO2 0.21) and during exposure to 10 episodes of IA (excluding GFR). Results: GFR was higher in CIH-conditioned vs. sham (p < 0.05), whereas normoxic RBF and renal tissue PO2 were significantly lower in CIH vs. sham (p < 0.05). Reductions in RBF, RP, and renal tissue PO2 during IA occurred in both groups but to a greater extent in CIH (p < 0.05). Pro-oxidative and pro-fibrotic gene programs were activated in renal tissue from CIH but not sham. Conclusion: CIH adversely affects renal hemodynamic regulation and oxygen flux during both normoxia and IA and results in changes in renal tissue gene expression.
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Affiliation(s)
- Kiefer W. Kious
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Kalie A. Savage
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Stephanie C. E. Twohey
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
- Department of Biology, Simpson College, Indianola, IA, United States
| | - Aubrey F. Highum
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Andrew Philipose
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Hugo S. Díaz
- Laboratory of Cardiorespiratory Control, Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile
- Facultad de Ciencias de la Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Santiago, Chile
| | - Rodrigo Del Rio
- Laboratory of Cardiorespiratory Control, Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile
- Centro de Excelencia en Biomedicina de Magallanes (CEBIMA), Universidad de Magallanes, Punta Arenas, Chile
| | - James A. Lang
- Department of Kinesiology, Iowa State University, Ames, IA, United States
| | - Sarah C. Clayton
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Noah J. Marcus
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
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Cosgrove D, Gratton MA, Madison J, Vosik D, Samuelson G, Meehan D, Delimont D, Phillips G, Smyth B, Pramparo T, Jarocki D, Nguyen M, Komers R, Jenkinson C. Dual inhibition of the endothelin and angiotensin receptor ameliorates renal and inner ear pathologies in Alport mice. J Pathol 2023; 260:353-364. [PMID: 37256677 PMCID: PMC10330771 DOI: 10.1002/path.6087] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/08/2023] [Accepted: 04/04/2023] [Indexed: 06/01/2023]
Abstract
Alport syndrome (AS), a type IV collagen disorder, leads to glomerular disease and, in some patients, hearing loss. AS is treated with inhibitors of the renin-angiotensin system; however, a need exists for novel therapies, especially those addressing both major pathologies. Sparsentan is a single-molecule dual endothelin type-A and angiotensin II type 1 receptor antagonist (DEARA) under clinical development for focal segmental glomerulosclerosis and IgA nephropathy. We report the ability of sparsentan to ameliorate both renal and inner ear pathologies in an autosomal-recessive Alport mouse model. Sparsentan significantly delayed onset of glomerulosclerosis, interstitial fibrosis, proteinuria, and glomerular filtration rate decline. Sparsentan attenuated glomerular basement membrane defects, blunted mesangial filopodial invasion into the glomerular capillaries, increased lifespan more than losartan, and lessened changes in profibrotic/pro-inflammatory gene pathways in both the glomerular and the renal cortical compartments. Notably, treatment with sparsentan, but not losartan, prevented accumulation of extracellular matrix in the strial capillary basement membranes in the inner ear and reduced susceptibility to hearing loss. Improvements in lifespan and in renal and strial pathology were observed even when sparsentan was initiated after development of renal pathologies. These findings suggest that sparsentan may address both renal and hearing pathologies in Alport syndrome patients. © 2023 Travere Therapeutics, Inc and The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Dominic Cosgrove
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Michael Anne Gratton
- Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO, USA
| | - Jacob Madison
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Denise Vosik
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Gina Samuelson
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Daniel Meehan
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Duane Delimont
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Grady Phillips
- Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO, USA
| | - Brendan Smyth
- Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO, USA
| | | | - Diana Jarocki
- Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO, USA
| | - Mai Nguyen
- Travere Therapeutics, San Diego, CA, USA
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19
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Jensen MS, de Araujo IBBA, Mutsaers HAM, Nørregaard R. Transcutaneous measurement of renal function in two rodent models of obstructive nephropathy. BMC Res Notes 2023; 16:119. [PMID: 37365638 DOI: 10.1186/s13104-023-06387-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 06/13/2023] [Indexed: 06/28/2023] Open
Abstract
OBJECTIVE Glomerular filtration rate (GFR) is a key indicator of renal function. In both clinical practice and pre-clinical research, serum levels of endogenous filtration markers, such as creatinine, are often used to estimate GFR. However, these markers often do not reflect minor changes in renal function. In this study, we therefore set out to evaluate the applicability of transcutaneous GFR (tGFR) measurements to monitor the changes in renal function, as compared to plasma creatinine (pCreatinine), in two models of obstructive nephropathy, namely unilateral ureteral obstruction (UUO) or bilateral ureteral obstruction followed by release (BUO-R) in male Wistar rats. RESULTS UUO animals showed a significant reduction in tGFR compared to baseline; whereas pCreatinine levels were not significantly changed. In BUO animals, tGFR drops 24 h post BUO and remains lower upon release of the obstruction until day 11. Concomitantly, pCreatinine levels were also increased 24 h after obstruction and 24 h post release, however after 4 days, pCreatinine returned to baseline levels. In conclusion, this study revealed that the tGFR method is superior at detecting minor changes in renal function as compared to pCreatinine measurements.
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Affiliation(s)
- Michael Schou Jensen
- Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 11, Aarhus N, DK-8200, Denmark
| | | | - Henricus A M Mutsaers
- Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 11, Aarhus N, DK-8200, Denmark
| | - Rikke Nørregaard
- Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 11, Aarhus N, DK-8200, Denmark.
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20
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Afolabi JM, Kanthakumar P, Williams JD, Kumar R, Soni H, Adebiyi A. Post-injury Inhibition of Endothelin-1 Dependent Renal Vasoregulation Mitigates Rhabdomyolysis-Induced Acute Kidney Injury. FUNCTION 2023; 4:zqad022. [PMID: 37342410 PMCID: PMC10278989 DOI: 10.1093/function/zqad022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 04/30/2023] [Accepted: 05/01/2023] [Indexed: 06/22/2023] Open
Abstract
In patients with rhabdomyolysis, the overwhelming release of myoglobin into the circulation is the primary cause of kidney injury. Myoglobin causes direct kidney injury as well as severe renal vasoconstriction. An increase in renal vascular resistance (RVR) results in renal blood flow (RBF) and glomerular filtration rate (GFR) reduction, tubular injury, and acute kidney injury (AKI). The mechanisms that underlie rhabdomyolysis-induced AKI are not fully understood but may involve the local production of vasoactive mediators in the kidney. Studies have shown that myoglobin stimulates endothelin-1 (ET-1) production in glomerular mesangial cells. Circulating ET-1 is also increased in rats subjected to glycerol-induced rhabdomyolysis. However, the upstream mechanisms of ET-1 production and downstream effectors of ET-1 actions in rhabdomyolysis-induced AKI remain unclear. Vasoactive ET-1 is generated by ET converting enzyme 1 (ECE-1)-induced proteolytic processing of inactive big ET to biologically active peptides. The downstream ion channel effectors of ET-1-induced vasoregulation include the transient receptor potential cation channel, subfamily C member 3 (TRPC3). This study demonstrates that glycerol-induced rhabdomyolysis in Wistar rats promotes ECE-1-dependent ET-1 production, RVR increase, GFR decrease, and AKI. Rhabdomyolysis-induced increases in RVR and AKI in the rats were attenuated by post-injury pharmacological inhibition of ECE-1, ET receptors, and TRPC3 channels. CRISPR/Cas9-mediated knockout of TRPC3 channels attenuated ET-1-induced renal vascular reactivity and rhabdomyolysis-induced AKI. These findings suggest that ECE-1-driven ET-1 production and downstream activation of TRPC3-dependent renal vasoconstriction contribute to rhabdomyolysis-induced AKI. Hence, post-injury inhibition of ET-1-mediated renal vasoregulation may provide therapeutic targets for rhabdomyolysis-induced AKI.
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Affiliation(s)
- Jeremiah M Afolabi
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Praghalathan Kanthakumar
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Jada D Williams
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Ravi Kumar
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Hitesh Soni
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Adebowale Adebiyi
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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21
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Williams JD, Kumar R, Afolabi JM, Park F, Adebiyi A. Rhabdomyolysis aggravates renal iron accumulation and acute kidney injury in a humanized mouse model of sickle cell disease. Free Radic Res 2023; 57:404-412. [PMID: 37840281 PMCID: PMC11259575 DOI: 10.1080/10715762.2023.2269313] [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: 05/23/2023] [Accepted: 09/29/2023] [Indexed: 10/17/2023]
Abstract
Individuals with sickle cell disease (SCD) are at greater risk of rhabdomyolysis, a potentially life-threatening condition resulting from the breakdown of skeletal muscle fibers. Acute kidney injury (AKI) is one of the most severe complications of rhabdomyolysis. Chronic kidney and cardiovascular disease, which account for SCD mortality, are long-term consequences of AKI. Although SCD elevates the risks of rhabdomyolysis-induced sudden death, the mechanisms that underlie rhabdomyolysis-induced AKI in SCD are unclear. In the present study, we show that, unlike their control non-sickling (AA) counterparts, transgenic homozygous SCD (SS; Townes model) mice exhibited 100% mortality 8-24 h after intramuscular glycerol injection. Five hours after glycerol injection, SS mice showed a more significant increase in myoglobinuria and plasma creatine kinase levels than AA mice. Basal plasma heme and kidney tissue iron levels were significantly higher in SS than in AA mice. In contrast to AA, glycerol-induced rhabdomyolysis aggravated these parameters in SS mice. Rhabdomyolysis also amplified oxidative stress in SS compared to AA mice. Glycerol-treated SS mice exhibited worse renal function, exemplified by a reduction in GFR with a corresponding increase in plasma and urinary biomarkers of early AKI and renal tubular damage. The free radical scavenger and Fenton chemistry inhibitor, TEMPOL, ameliorated rhabdomyolysis-induced AKI in the SS mice. These findings demonstrate that oxidative stress driven by renal iron accumulation amplifies rhabdomyolysis-induced AKI in SCD mice.
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Affiliation(s)
- Jada D. Williams
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Ravi Kumar
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri
| | - Jeremiah M. Afolabi
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Frank Park
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Adebowale Adebiyi
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri
- NextGen Precision Health, University of Missouri, Columbia, Missouri
- Department of Anesthesiology and Perioperative Medicine, University of Missouri, Columbia, Missouri
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22
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Qiao P, Sun Y, Wang Y, Lin S, An Y, Wang L, Liu J, Huang Y, Yang B, Zhou H. Activation of NRF2 Signaling Pathway Delays the Progression of Hyperuricemic Nephropathy by Reducing Oxidative Stress. Antioxidants (Basel) 2023; 12:antiox12051022. [PMID: 37237889 DOI: 10.3390/antiox12051022] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/28/2023] Open
Abstract
Hyperuricemia (HUA)-induced oxidative stress is a crucial contributor to hyperuricemic nephropathy (HN), but the molecular mechanisms underlying the disturbed redox homeostasis in kidneys remain elusive. Using RNA sequencing, together with biochemical analyses, we found that nuclear factor erythroid 2-related factor 2 (NRF2) expression and nuclear localization levels were increased in early HN progression and then gradually declined below the baseline level. We identified the impaired activity of the NRF2-activated antioxidant pathway as a driver of oxidative damage in HN progression. Through nrf2 deletion, we further confirmed aggravated kidney damage in nrf2 knockout HN mice compared with HN mice. In contrast, the pharmacological agonist of NRF2 improved kidney function and alleviated renal fibrosis in mice. Mechanistically, the activation of NRF2 signaling reduced oxidative stress by restoring mitochondrial homeostasis and reducing NADPH oxidase 4 (NOX4) expression in vivo or in vitro. Moreover, the activation of NRF2 promoted the expression levels of heme oxygenase 1 (HO-1) and quinone oxidoreductase 1 (NQO1) and enhanced the antioxidant capacity of cells. Furthermore, the activation of NRF2 ameliorated renal fibrosis in HN mice through the downregulation of the transforming growth factor-beta 1 (TGF-β1) signaling pathway and ultimately delayed the progression of HN. Collectively, these results suggested NRF2 as a key regulator in improving mitochondrial homeostasis and fibrosis in renal tubular cells by reducing oxidative stress, upregulating the antioxidant signaling pathway, and downregulating the TGF-β1 signaling pathway. The activation of NRF2 represents a promising strategy to restore redox homeostasis and combat HN.
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Affiliation(s)
- Panshuang Qiao
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Yi Sun
- Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Yiming Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Simei Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Yongpan An
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Liang Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Jihan Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Yajun Huang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Baoxue Yang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Hong Zhou
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
- Department of the Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing 100191, China
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Ashraf UM, Atari E, Alasmari F, Waghulde H, Kumar V, Sari Y, Najjar SM, Jose PA, Kumarasamy S. Intrarenal Dopaminergic System Is Dysregulated in SS- Resp18mutant Rats. Biomedicines 2023; 11:111. [PMID: 36672619 PMCID: PMC9855394 DOI: 10.3390/biomedicines11010111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 12/23/2022] [Accepted: 12/27/2022] [Indexed: 01/04/2023] Open
Abstract
The genetic and molecular basis of developing high blood pressure and renal disease are not well known. Resp18mutant Dahl salt-sensitive (SS-Resp18mutant) rats fed a 2% NaCl diet for six weeks have high blood pressure, increased renal fibrosis, and decreased mean survival time. Impairment of the dopaminergic system also leads to hypertension that involves renal and non-renal mechanisms. Deletion of any of the five dopamine receptors may lead to salt-sensitive hypertension. Therefore, we investigated the interaction between Resp18 and renal dopamine in SS-Resp18mutant and Dahl salt-sensitive (SS) rats. We found that SS-Resp18mutant rats had vascular dysfunction, as evidenced by a decrease in vasorelaxation in response to sodium nitroprusside. The pressure-natriuresis curve in SS-Resp18mutant rats was shifted down and to the right of SS rats. SS-Resp18mutant rats had decreased glomerular filtration rate and dopamine receptor subtypes, D1R and D5R. Renal dopamine levels were decreased, but urinary dopamine levels were increased, which may be the consequence of increased renal dopamine production, followed by secretion into the tubular lumen. The increased renal dopamine production in SS-Resp18mutant rats in vivo was substantiated by the increased dopamine production in renal proximal tubule cells treated with L-DOPA. Overall, our study provides evidence that targeted disruption of the Resp18 locus in the SS rat dysregulates the renal dopaminergic system.
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Affiliation(s)
- Usman M. Ashraf
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Ealla Atari
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Fawaz Alasmari
- Department of Pharmacology and Experimental Therapeutics, University of Toledo College of Pharmacy & Pharmaceutical Sciences, Toledo, OH 43614, USA
| | - Harshal Waghulde
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Vikash Kumar
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Youssef Sari
- Department of Pharmacology and Experimental Therapeutics, University of Toledo College of Pharmacy & Pharmaceutical Sciences, Toledo, OH 43614, USA
| | - Sonia M. Najjar
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA
- Diabetes Institute, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA
| | - Pedro A. Jose
- Department of Medicine, Division of Kidney Diseases & Hypertension, The George Washington University School of Medicine & Health Sciences, Washington, DC 20052, USA
- Department of Pharmacology and Physiology, The George Washington University School of Medicine & Health Sciences, Washington, DC 20052, USA
| | - Sivarajan Kumarasamy
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA
- Diabetes Institute, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA
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24
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Protective effect of Cistanche deserticola on gentamicin-induced nephrotoxicity in rats. CHINESE HERBAL MEDICINES 2023; 15:102-109. [PMID: 36875447 PMCID: PMC9975639 DOI: 10.1016/j.chmed.2022.03.008] [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: 01/17/2022] [Revised: 04/15/2022] [Accepted: 06/24/2022] [Indexed: 12/23/2022] Open
Abstract
Objective Gentamicin (GM) is a commonly used aminoglycoside antibiotic, however, renal toxicity has limited its usage. The present study was designed to evaluate the ameliorative effect of Cistanche deserticola on GM-induced nephrotoxicity in rats. Methods The nephrotoxicity in rats was induced by intraperitoneal administration of GM (100 mg/kg) for 10 consecutive days. Glomerular filtration rate, blood urea nitrogen, creatinine and kidney histopathology were detected to assess the GM-induced nephrotoxicity. The oxidative stress (catalase, superoxide dismutase, glutathione and malondialdehyde) was assessed. The inflammatory response (tumor necrosis factor-α, interleukin-6, myeloperoxidase and nuclear factor-kappa B) and apoptotic marker (Bax and Bcl-2) were also evaluated. Results The results showed that water and 75% ethanol extracts of C. deserticola (named CDW and CDE, respectively) (100, 200 and 400 mg/kg) in combination with GM could recover the reduction of glomerular filtration rate and enhance the renal endogenous antioxidant capability induced by GM. The increase in the expression of renal inflammatory cytokines (tumor necrosis factor-α and interleukin-6), nuclear protein of nuclear factor-kappa B (p65) and the activity of myeloperoxidase induced by GM was significantly decreased upon CDW or CDE treatment. In addition, CDW or CDE treatment could decrease the Bax protein expression and increase the Bcl-2 protein expression in GM-induced nephrotoxicity in rats significantly. Conclusion The study demonstrated that C. deserticola treatment could attenuate kidney dysfunction and structural damage in rats induced by GM through the reduction of inflammation, oxidative stress and apoptosis.
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Mullins TP, Schock-Kusch D, Gallo LA. Transdermal Measurement of Glomerular Filtration Rate in Preclinical Research. Methods Mol Biol 2023; 2664:309-315. [PMID: 37423996 DOI: 10.1007/978-1-0716-3179-9_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
The measurement of glomerular filtration rate (GFR) is essential to understanding renal physiology, including the monitoring of disease progression and treatment effectiveness. Transdermal measurement of glomerular filtration rate (tGFR) using a miniaturized fluorescence monitor in combination with a fluorescent exogenous GFR tracer has become a common technique to measure GFR in the preclinical setting, especially in rodent models. It allows for close to real-time measurement of GFR in conscious unrestrained animals and overcomes several limitations of other GFR measures. Its widespread use is reflected by published research articles and conference abstracts from different research fields, including in the assessment of new and existing kidney therapeutics, evaluation of nephrotoxicity, screening of novel chemical or medical agents, and fundamental understanding of kidney function.
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Affiliation(s)
- Thomas P Mullins
- School of Biomedical Sciences, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Daniel Schock-Kusch
- Institute of Process Control and Innovative Energy Conversion, Mannheim University of Applied Sciences, Mannheim, Germany
| | - Linda A Gallo
- School of Biomedical Sciences, The University of Queensland, St Lucia, Brisbane, QLD, Australia.
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Li XC, Hassan R, Leite APO, Katsurada A, Dugas C, Sato R, Zhuo JL. Genetic Deletion of AT 1a Receptor or Na +/H + Exchanger 3 Selectively in the Proximal Tubules of the Kidney Attenuates Two-Kidney, One-Clip Goldblatt Hypertension in Mice. Int J Mol Sci 2022; 23:ijms232415798. [PMID: 36555438 PMCID: PMC9779213 DOI: 10.3390/ijms232415798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/30/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
The roles of angiotensin II (Ang II) AT1 (AT1a) receptors and its downstream target Na+/H+ exchanger 3 (NHE3) in the proximal tubules in the development of two-kidney, 1-clip (2K1C) Goldblatt hypertension have not been investigated previously. The present study tested the hypothesis that deletion of the AT1a receptor or NHE3 selectively in the proximal tubules of the kidney attenuates the development of 2K1C hypertension using novel mouse models with proximal tubule-specific deletion of AT1a receptors or NHE3. 2K1C Goldblatt hypertension was induced by placing a silver clip (0.12 mm) on the left renal artery for 4 weeks in adult male wild-type (WT), global Agtr1a−/−, proximal tubule (PT)-specific PT-Agtr1a−/− or PT-Nhe3−/− mice, respectively. As expected, telemetry blood pressure increased in a time-dependent manner in WT mice, reaching a maximal response by Week 3 (p < 0.01). 2K1C hypertension in WT mice was associated with increases in renin expression in the clipped kidney and decreases in the nonclipped kidney (p < 0.05). Plasma and kidney Ang II were significantly increased in WT mice with 2K1C hypertension (p < 0.05). Tubulointerstitial fibrotic responses were significantly increased in the clipped kidney (p < 0.01). Whole-body deletion of AT1a receptors completely blocked the development of 2K1C hypertension in Agtr1a−/− mice (p < 0.01 vs. WT). Likewise, proximal tubule-specific deletion of Agtr1a in PT-Agtr1a−/− mice or NHE3 in PT-Nhe3−/− mice also blocked the development of 2K1C hypertension (p < 0.01 vs. WT). Taken together, the present study provides new evidence for a critical role of proximal tubule Ang II/AT1 (AT1a)/NHE3 axis in the development of 2K1C Goldblatt hypertension.
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Affiliation(s)
- Xiao Chun Li
- Tulane Hypertension and Renal Center of Excellence, 1430 Tulane Avenue, New Orleans, LA 70112, USA
- Department of Physiology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA 70112, USA
| | - Rumana Hassan
- Tulane Hypertension and Renal Center of Excellence, 1430 Tulane Avenue, New Orleans, LA 70112, USA
- Department of Physiology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA 70112, USA
| | - Ana Paula O. Leite
- Tulane Hypertension and Renal Center of Excellence, 1430 Tulane Avenue, New Orleans, LA 70112, USA
- Department of Physiology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA 70112, USA
| | - Akemi Katsurada
- Tulane Hypertension and Renal Center of Excellence, 1430 Tulane Avenue, New Orleans, LA 70112, USA
- Department of Physiology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA 70112, USA
| | - Courtney Dugas
- Tulane Hypertension and Renal Center of Excellence, 1430 Tulane Avenue, New Orleans, LA 70112, USA
- Department of Physiology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA 70112, USA
| | - Ryosuke Sato
- Tulane Hypertension and Renal Center of Excellence, 1430 Tulane Avenue, New Orleans, LA 70112, USA
- Department of Physiology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA 70112, USA
| | - Jia Long Zhuo
- Tulane Hypertension and Renal Center of Excellence, 1430 Tulane Avenue, New Orleans, LA 70112, USA
- Department of Physiology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA 70112, USA
- Correspondence: ; Tel.: +1-504-988-4363; Fax: +1-504-988-2675
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Kious KW, Philipose A, Smith LJ, Kemble JP, Twohey SCE, Savage K, Díaz HS, Del Rio R, Marcus NJ. Peripheral chemoreflex modulation of renal hemodynamics and renal tissue PO2 in chronic heart failure with reduced ejection fraction. Front Physiol 2022; 13:955538. [PMID: 36091359 PMCID: PMC9459040 DOI: 10.3389/fphys.2022.955538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 07/25/2022] [Indexed: 11/13/2022] Open
Abstract
Aberrant carotid body chemoreceptor (CBC) function contributes to increased sympathetic nerve activity (SNA) and reduced renal blood flow (RBF) in chronic heart failure (CHF). Intermittent asphyxia (IA) mimicking sleep apnea is associated with additional increases in SNA and may worsen reductions in RBF and renal PO2 (RPO2) in CHF. The combined effects of decreased RBF and RPO2 may contribute to biochemical changes precipitating renal injury. This study sought to determine the role of CBC activity on glomerular filtration rate (GFR), RBF and RPO2 in CHF, and to assess the additive effects of IA. Furthermore, we sought to identify changes in gene expression that might contribute to renal injury. We hypothesized that GFR, RBF, and RPO2 would be reduced in CHF, that decreases in RBF and RPO2 would be worsened by IA, and that these changes would be ameliorated by CBC ablation (CBD). Finally, we hypothesized that CHF would be associated with pro-oxidative pro-fibrotic changes in renal gene expression that would be ameliorated by CBD. CHF was induced in adult male Sprague Dawley rats using coronary artery ligation (CAL). Carotid body denervation was performed by cryogenic ablation. GFR was assessed in conscious animals at the beginning and end of the experimental period. At 8-weeks post-CAL, cardiac function was assessed via echocardiography, and GFR, baseline and IA RBF and RPO2 were measured. Renal gene expression was measured using qRT-PCR. GFR was lower in CHF compared to sham (p < 0.05) but CBD had no salutary effect. RBF and RPO2 were decreased in CHF compared to sham (p < 0.05), and this effect was attenuated by CBD (p < 0.05). RBF and RPO2 were reduced to a greater extent in CHF vs. sham during exposure to IA (p < 0.05), and this effect was attenuated by CBD for RBF (p < 0.05). Downregulation of antioxidant defense and fibrosis-suppressing genes was observed in CHF vs. sham however CBD had no salutary effect. These results suggest that aberrant CBC function in CHF has a clear modulatory effect on RBF during normoxia and during IA simulating central sleep apnea.
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Affiliation(s)
- Kiefer W. Kious
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Andrew Philipose
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Luke J. Smith
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Jayson P. Kemble
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Stephanie C. E. Twohey
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
- Department of Biology, Simpson College, Indianola, IA, United States
| | - Kalie Savage
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
| | - Hugo S. Díaz
- Laboratory of Cardiorespiratory Control, Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rodrigo Del Rio
- Laboratory of Cardiorespiratory Control, Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Noah J. Marcus
- Department of Physiology and Pharmacology, Des Moines University Medicine and Health Sciences, Des Moines, IA, United States
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Lu Y, Manson SR, de Araujo IBBA, Austin PF, Djurhuus JC, Olsen LH, Nørregaard R. The Release of 24 h Infravesical Obstruction in Mice: Changes in Molecular, Morphological, and Functional Parameters for 14-Day Observation. Front Med (Lausanne) 2022; 9:892746. [PMID: 35646977 PMCID: PMC9133373 DOI: 10.3389/fmed.2022.892746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 04/13/2022] [Indexed: 11/18/2022] Open
Abstract
Bladder outlet obstruction (BOO) induces bladder dysfunction and altered bladder architecture. Irrespective of the release of the obstruction, persistent bladder dysfunction severely affects the quality of life. A better understanding of the repair process offers an opportunity to enhance postintervention management. We subsequently evaluated the postobstructive repair process in mice subjected to 24 h BOO followed by release. Male and female mice bladders were obstructed for 24 h by placing a clip around the bladder neck. After the release of obstruction, the mice were studied for 3, 7, and 14 days to observe the bladder repair process over time. Voiding frequency and volume were recorded using the voiding spot assay, and the transcutaneous glomerular filtration rate (tGFR) was measured. Fibrogenesis and associated gene expressions and altered protein levels were evaluated in the bladder using histology, quantatative polymerase chain reaction (qPCR), and Western blot analyses. Bladder wall thickness was increased in both genders over time but occurred later in female mice. Moreover, collagen deposition in the smooth muscle layer increased over time in both genders. Male mice showed a decreased average voided volume at 3 days post release, while female mice showed no significant change during the time course. Fibrosis-related molecular events, including upregulation of fibronectin (FN) protein and Collagen-3 (Col-3) mRNA expression, were transient and normalized again at 14 days in both genders. Transforming growth factor-β (TGF-β) and bone morphogenic protein (BMP)-7 mRNA expressions were upregulated at 14 days post release in both genders. Transcutaneous GFR remained normal during the time course. Release of 24 h BOO initiated a bladder remodeling process. The animal model enables a wide range of experiments to study bladder remodeling, and gender differences offer potential targets for understanding bladder fibrosis and adaptation with BOO.
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Affiliation(s)
- Yutao Lu
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Scott R. Manson
- Department of Urology, Baylor College of Medicine, Houston, TX, United States
| | | | - Paul F. Austin
- Department of Urology, Baylor College of Medicine, Houston, TX, United States
| | - Jens C. Djurhuus
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - L. Henning Olsen
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Rikke Nørregaard
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- *Correspondence: Rikke Nørregaard,
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Shimada S, Yang C, Kurth T, Cowley AW. Divergent roles of angiotensin II upon the immediate and sustained increases of renal blood flow following unilateral nephrectomy. Am J Physiol Renal Physiol 2022; 322:F473-F485. [PMID: 35224992 PMCID: PMC8977133 DOI: 10.1152/ajprenal.00376.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 01/31/2022] [Accepted: 02/18/2022] [Indexed: 12/18/2022] Open
Abstract
Although the molecular and functional responses related to renal compensatory hypertrophy after unilateral nephrectomy (UNX) has been well described, many aspects of these events remain unclear. One question is how the remaining kidney senses the absence of the contralateral organ, and another is what the role of the renin-angiotensin system is in these responses. Both acute anesthetized and chronic unanesthetized experiments were performed using the angiotensin II type 1 receptor blocker losartan and the renin inhibitor aliskiren to determine the contribution of the renin-angiotensin system to immediate changes and losartan for chronic changes of renal blood flow (RBF) and the associated hypertrophic events in male Sprague-Dawley rats. Chronic experiments used implanted RBF probes and arterial catheters for continuous data collection, and the glomerular filtration rate was determined by noninvasive transcutaneous FITC-sinistrin measurements. The results of the acute experiments found that RBF increased nearly 25% (4.6 ± 0.5 to 5.6 ± 0.6 mL/min/g kidney wt) during the first 15 min following UNX and that this response was abolished by losartan (6.7 ± 0.7 to 7.0 ± 0.7 mL/min/g kidney wt) or aliskiren (5.8 ± 0.4 to 6.0 ± 0.4 mL/min/g kidney wt) treatment. Thereafter, RBF increased progressively over 7 days, and kidney weight increased by 19% of pre-UNX values. When normalized to kidney weight determined at day 7 after UNX, RBF was not significantly different from pre-UNX levels. Semiquantification of CD31-positive capillaries revealed increases of the glomeruli and peritubular capillaries that paralleled the kidney hypertrophy. None of these chronic changes was inhibited by losartan treatment, indicating that neither the compensatory structural nor the RBF changes were angiotensin II type 1 receptor dependent.NEW & NOTEWORTHY This study found that the immediate increases of renal blood flow (RBF) following unilateral nephrectomy (UNX) are a consequence of reduced angiotensin II type 1 (AT1) receptor stimulation. The continuous monitoring of RBF and intermittent measurement of glomerular filtration rate (GFR) in conscious rats during the 1-wk period of rapid hypertrophy following UNX provided unique insights into the regulation of RBF and GFR when faced with increased metabolic loads. It was found that neither kidney hypertrophy nor the associated increase of capillaries was an AT1-dependent phenomenon.
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Affiliation(s)
- Satoshi Shimada
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Chun Yang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Theresa Kurth
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Allen W Cowley
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
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30
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Khalaf FK, Mohammed CJ, Dube P, Connolly JA, Lad A, Ashraf UM, Breidenbach JD, Su RC, Kleinhenz AL, Malhotra D, Gohara AF, Haller ST, Kennedy DJ. Paraoxonase-1 Regulation of Renal Inflammation and Fibrosis in Chronic Kidney Disease. Antioxidants (Basel) 2022; 11:antiox11050900. [PMID: 35624764 PMCID: PMC9137734 DOI: 10.3390/antiox11050900] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/27/2022] [Accepted: 04/27/2022] [Indexed: 12/04/2022] Open
Abstract
Papraoxonase-1 (PON1) is a hydrolytic lactonase enzyme that is synthesized in the liver and circulates attached to high-density lipoproteins (HDL). Clinical studies have demonstrated an association between diminished PON-1 and the progression of chronic kidney disease (CKD). However, whether decreased PON-1 is mechanistically linked to renal injury is unknown. We tested the hypothesis that the absence of PON-1 is mechanistically linked to the progression of renal inflammation and injury in CKD. Experiments were performed on control Dahl salt-sensitive rats (SSMcwi, hereafter designated SS rats) and Pon1 knock-out rats (designated SS-Pon1em1Mcwi, hereafter designated SS-PON-1 KO rats) generated by injecting a CRISPR targeting the sequence into SSMcwi rat embryos. The resulting mutation is a 7 bp frameshift insertion in exon 4 of the PON-1 gene. First, to examine the renal protective role of PON-1 in settings of CKD, ten-week-old, age-matched male rats were maintained on a high-salt diet (8% NaCl) for up to 5 weeks to initiate the salt-sensitive hypertensive renal disease characteristic of this model. We found that SS-PON-1 KO rats demonstrated several hallmarks of increased renal injury vs. SS rats including increased renal fibrosis, sclerosis, and tubular injury. SS-PON-1 KO also demonstrated increased recruitment of immune cells in the renal interstitium, as well as increased expression of inflammatory genes compared to SS rats (all p < 0.05). SS-PON-1 KO rats also showed a significant (p < 0.05) decline in renal function and increased renal oxidative stress compared to SS rats, despite no differences in blood pressure between the two groups. These findings suggest a new role for PON-1 in regulating renal inflammation and fibrosis in the setting of chronic renal disease independent of blood pressure.
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Affiliation(s)
- Fatimah K. Khalaf
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
- Department of Clinical Pharmacy, University of Alkafeel, Najaf 54001, Iraq
| | - Chrysan J. Mohammed
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Prabhatchandra Dube
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Jacob A. Connolly
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Apurva Lad
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Usman M. Ashraf
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Joshua D. Breidenbach
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Robin C. Su
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Andrew L. Kleinhenz
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Deepak Malhotra
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Amira F. Gohara
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Steven T. Haller
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - David J. Kennedy
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
- Correspondence: ; Tel.: +1-419-383-6822
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Pais GM, Chang J, Liu J, Scheetz MH. A Translational Rat Model to Assess Glomerular Function Changes with Vancomycin. Int J Antimicrob Agents 2022; 59:106583. [PMID: 35378229 PMCID: PMC10119746 DOI: 10.1016/j.ijantimicag.2022.106583] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 03/16/2022] [Accepted: 03/27/2022] [Indexed: 11/05/2022]
Abstract
Vancomycin (VAN) causes acute kidney injury as defined by serum creatinine (SCr) increase. Glomerular filtration rate (GFR) is the gold standard for defining kidney function, and SCr is often used as a GFR surrogate; however, SCr changes can lag behind acute functional decline. We sought to define the rate and extent of GFR change for VAN in a translational rat model. Male Sprague Dawley rats received VAN 150 mg/kg/day intravenously (n = 6) or saline (n = 5) once daily followed by an intravenous injection of fluorescein isothiocyanate-sinistrin (FITC-sinistrin) for 3 days. FITC-sinistrin fluorescence was monitored transdermally prior to VAN administration and daily during treatment. GFR was calculated from FITC-sinistrin clearance. A mixed-effects model compared urinary biomarkers and GFRs between treatments and across days of dosing. Urinary biomarkers for injury and GFR were compared between treatment groups and correlated with VAN kidney accumulation. Mean GFR for saline-treated animals was 1.07, 1.20, 1.15 and 1.24 mL/min/100g body weight (b.w.) pre-treatment and at Days 1-3, respectively. VAN-treated rats had lower GFR after treatment (0.457, 0.584 and 0.759 mL/min/100g b.w. on Days 1-3, respectively; P ≤ 0.05). KIM-1 and clusterin were elevated on Day 1 for VAN-treated animals. The relationship between VAN accumulation in the kidney with GFR and biomarkers followed a four-parameter Hill slope (R2 = 0.6 and R2 = 0.9, respectively). Rats receiving VAN had a significant decline in GFR immediately following the first dose, which correlated with increasing VAN concentrations in the kidney and urinary biomarkers.
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32
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Brown AK, Nichols A, Coley CA, Ekperikpe US, McPherson KC, Shields CA, Poudel B, Cornelius DC, Williams JM. Treatment With Lisinopril Prevents the Early Progression of Glomerular Injury in Obese Dahl Salt-Sensitive Rats Independent of Lowering Arterial Pressure. Front Physiol 2021; 12:765305. [PMID: 34975523 PMCID: PMC8719629 DOI: 10.3389/fphys.2021.765305] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/25/2021] [Indexed: 01/04/2023] Open
Abstract
Recently, we reported that obese Dahl salt-sensitive leptin receptor mutant (SSLepRmutant) rats develop glomerular injury and progressive proteinuria prior to puberty. Moreover, this early progression of proteinuria was associated with elevations in GFR. Therefore, the current study examined whether treatment with lisinopril to reduce GFR slows the early progression of proteinuria in SSLepRmutant rats prior to puberty. Experiments were performed on 4-week-old SS and SSLepRmutant rats that were either treated with vehicle or lisinopril (20 mg/kg/day, drinking water) for 4 weeks. We did not observe any differences in MAP between SS and SSLepRmutant rats treated with vehicle (148 ± 5 vs. 163 ± 6 mmHg, respectively). Interestingly, chronic treatment with lisinopril markedly reduced MAP in SS rats (111 ± 3 mmHg) but had no effect on MAP in SSLepRmutant rats (155 ± 4 mmHg). Treatment with lisinopril significantly reduced proteinuria in SS and SSLepRmutant rats compared to their vehicle counterparts (19 ± 5 and 258 ± 34 vs. 71 ± 12 and 498 ± 66 mg/day, respectively). Additionally, nephrin excretion was significantly elevated in SSLepRmutant rats versus SS rats, and lisinopril reduced nephrin excretion in both strains. GFR was significantly elevated in SSLepRmutant rats compared to SS rats, and lisinopril treatment reduced GFR in SSLepRmutant rats by 30%. The kidneys from SSLepRmutant rats displayed glomerular injury with increased mesangial expansion and renal inflammation versus SS rats. Chronic treatment with lisinopril significantly decreased glomerular injury and renal inflammation in the SSLepRmutant rats. Overall, these data indicate that inhibiting renal hyperfiltration associated with obesity is beneficial in slowing the early development of glomerular injury and renal inflammation.
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Affiliation(s)
- Andrea K. Brown
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
| | - Alyssa Nichols
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
| | - Chantell A. Coley
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
| | - Ubong S. Ekperikpe
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
| | - Kasi C. McPherson
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
| | - Corbin A. Shields
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
| | - Bibek Poudel
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
| | - Denise C. Cornelius
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, MS, United States
| | - Jan M. Williams
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, United States
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Zhang R, Cheng L, Dong Z, Hou L, Zhang S, Meng Z, Betzer O, Wang Y, Popovtzer R, Liu Z. Ultra-small natural product based coordination polymer nanodots for acute kidney injury relief. MATERIALS HORIZONS 2021; 8:1314-1322. [PMID: 34821924 DOI: 10.1039/d0mh00193g] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Acute kidney injury (AKI) is frequently associated with reactive oxygen species (ROS) and causes high mortality in clinics annually, and nanotechnology-mediated antioxidative therapy is emerging as a novel strategy for AKI treatment. Herein, four kinds of natural antioxidants are able to coordinate with iron (Fe) ions to form ultra-small coordination polymer nanodots (CPNs) with good water dispersibility and strong ROS scavenging ability. In particular, Fe-curcumin CPNs (Fe-Cur CPNs) are applied for cellular ROS scavenging and rhabdomyolysis-induced AKI relief.
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Affiliation(s)
- Rui Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China.
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Ahmad A, Shi J, Ansari S, Afaghani J, Molina J, Pollack A, Merscher S, Zeidan YH, Fornoni A, Marples B. Noninvasive assessment of radiation-induced renal injury in mice. Int J Radiat Biol 2021; 97:664-674. [PMID: 33464992 PMCID: PMC8352084 DOI: 10.1080/09553002.2021.1876950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 12/11/2020] [Accepted: 01/06/2021] [Indexed: 12/25/2022]
Abstract
PURPOSE The kidney is a radiosensitive late-responding normal tissue. Injury is characterized by radiation nephropathy and decline of glomerular filtration rate (GFR). The current study aimed to compare two rapid and cost-effective methodologies of assessing GFR against more conventional biomarker measurements. METHODS C57BL/6 mice were treated with bilateral focal X-irradiation (1x14Gy or 5x6Gy). Functional measurements of kidney injury were assessed 20 weeks post-treatment. GFR was estimated using a transcutaneous measurement of fluorescein-isothiocyanate conjugated (FITC)-sinistrin renal excretion and also dynamic contrast-enhanced CT imaging with a contrast agent (ISOVUE-300 Iopamidol). RESULTS Hematoxylin and eosin (H&E) and Periodic acid-Schiff staining identified comparable radiation-induced glomerular atrophy and mesangial matrix accumulation after both radiation schedules, respectively, although the fractionated regimen resulted in less diffuse tubulointerstitial fibrosis. Albumin-to-creatinine ratios (ACR) increased after irradiation (1x14Gy: 100.4 ± 12.2 µg/mg; 6x5Gy: 80.4 ± 3.02 µg/mg) and were double that of nontreated controls (44.9 ± 3.64 µg/mg). GFR defined by both techniques was negatively correlated with BUN, mesangial expansion score, and serum creatinine. The FITC-sinistrin transcutaneous method was more rapid and can be used to assess GFR in conscious animals, dynamic contrast-enhanced CT imaging technique was equally safe and effective. CONCLUSION This study demonstrated that GFR measured by dynamic contrast-enhanced CT imaging is safe and effective compared to transcutaneous methodology to estimate kidney function.
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Affiliation(s)
- Anis Ahmad
- Department of Radiation Oncology, University of Miami, Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL
| | - Junwei Shi
- Department of Radiation Oncology, University of Miami, Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL
| | - Saba Ansari
- Department of Radiation Oncology, University of Miami, Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL
| | - Jumana Afaghani
- Department of Radiation Oncology, University of Miami, Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL
| | - Judith Molina
- Peggy and Harold Katz Family Drug Discovery Center and Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami, Miami, FL, USA
| | - Alan Pollack
- Department of Radiation Oncology, University of Miami, Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL
| | - Sandra Merscher
- Peggy and Harold Katz Family Drug Discovery Center and Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami, Miami, FL, USA
| | - Youssef H. Zeidan
- Department of Radiation Oncology, Anatomy, Cell Biology, and Physiology, American University of Beirut School of Medicine, Beirut, Lebanon
| | - Alessia Fornoni
- Peggy and Harold Katz Family Drug Discovery Center and Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami, Miami, FL, USA
| | - Brian Marples
- Department of Radiation Oncology, University of Miami, Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL
- Department of Radiation Oncology, University of Rochester, Rochester, NY 14642
- Peggy and Harold Katz Family Drug Discovery Center and Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami, Miami, FL, USA
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Iohexol plasma clearance simplified by Dried Blood Spot (DBS) sampling to measure renal function in conscious mice. Sci Rep 2021; 11:4591. [PMID: 33633207 PMCID: PMC7907335 DOI: 10.1038/s41598-021-83934-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 01/18/2021] [Indexed: 12/28/2022] Open
Abstract
There is no simple method to measure glomerular filtration rate (GFR) in mice, which limits the use of mice in models of renal diseases. We aimed at simplifying the plasma clearance of iohexol in mice, using dried blood spot (DBS) sampling in order to reduce the amount of blood taken for analysis. GFR was measured simultaneously by a reference method in total blood—as described before—and tested method using DBS in fifteen male and six female C57BL/6J mice. Total blood extraction was 50 μL for the reference methods and 25μL for the tested methods, distributed in 5 samples. The agreement of GFR values between both methods was analyzed with the concordance correlation coefficient (CCC), total deviation index (TDI) and coverage probability (CP). The agreement between both methods was excellent, showing a TDI = 8.1%, which indicates that 90% of the GFR values obtained with DBS showed an error ranging from − 8 to + 8% of the reference method; a CCC of 0.996 (CI: 0.992), reflecting high precision and accuracy and a CP of 94 (CI: 83), indicating that 6% of the GFR values obtained with DBS had an error greater than 10% of the method in blood. So, both methods are interchangeable. DBS represent a major simplification of GFR measurement in mice. Also, DBS improves animal welfare by reducing the total blood required and refining the procedure.
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Besseling PJ, Pieters TT, Nguyen ITN, de Bree PM, Willekes N, Dijk AH, Bovée DM, Hoorn EJ, Rookmaaker MB, Gerritsen KG, Verhaar MC, Gremmels H, Joles JA. A plasma creatinine- and urea-based equation to estimate glomerular filtration rate in rats. Am J Physiol Renal Physiol 2021; 320:F518-F524. [PMID: 33522412 DOI: 10.1152/ajprenal.00656.2020] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Monitoring renal function is a vital part of kidney research involving rats. The laborious measurement of glomerular filtration rate (GFR) with administration of exogenous filtration markers does not easily allow serial measurements. Using an in-house database of inulin clearances, we developed and validated a plasma creatinine- and plasma urea-based equation to estimate GFR in a large cohort of male rats [development cohort n = 325, R2 = 0.816, percentage of predictions that fell within 30% of the true value (P30) = 76%] that had high accuracy in the validation cohort (n = 116 rats, R2 = 0.935, P30 = 79%). The equation was less accurate in rats with nonsteady-state creatinine, in which the equation should therefore not be used. In conclusion, applying this equation facilitates easy and repeatable estimates of GFR in rats.NEW & NOTEWORTHY This is the first equation, that we know of, which estimates glomerular filtration rate in rats based on a single measurement of body weight, plasma creatinine, and plasma urea.
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Affiliation(s)
- Paul J Besseling
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Tobias T Pieters
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Isabel T N Nguyen
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Petra M de Bree
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Nel Willekes
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Adele H Dijk
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Dominique M Bovée
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Ewout J Hoorn
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Maarten B Rookmaaker
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Karin G Gerritsen
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marianne C Verhaar
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Hendrik Gremmels
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands.,Department of Medical Microbiology and Immunology, Diakonessenhuis, Utrecht, The Netherlands
| | - Jaap A Joles
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
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Real-time glomerular filtration rate: improving sensitivity, accuracy and prognostic value in acute kidney injury. Curr Opin Crit Care 2021; 26:549-555. [PMID: 33002974 DOI: 10.1097/mcc.0000000000000770] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE OF REVIEW Acute kidney injury (AKI) is common and associated with high patient mortality, and accelerated progression to chronic kidney disease. Our ability to diagnose and stratify patients with AKI is paramount for translational progress. Unfortunately, currently available methods have major pitfalls. Serum creatinine is an insensitive functional biomarker of AKI, slow to register the event and influenced by multiple variables. Cystatin C, a proposed alternative, requires long laboratory processing and also lacks specificity. Other techniques are either very cumbersome (inuline, iohexol) or involve administration of radioactive products, and are therefore, not applicable on a large scale. RECENT FINDINGS The development of two optical measurement techniques utilizing novel minimally invasive techniques to quantify kidney function, independent of serum or urinary measurements is advancing. Utilization of both one and two compartmental models, as well as continuous monitoring, are being developed. SUMMARY The clinical utility of rapid GFR measurements in AKI patients remains unknown as these disruptive technologies have not been tested in studies exploring clinical outcomes. However, these approaches have the potential to improve our understanding of AKI and clinical care. This overdue technology has the potential to individualize patient care and foster therapeutic success in AKI.
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Martin WP, le Roux CW, Docherty NG. Impact of Metabolic Surgery on Renal Injury in Pre-Clinical Models of Diabetic Kidney Disease. Nephron Clin Pract 2020; 145:585-594. [PMID: 33264793 DOI: 10.1159/000511790] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 09/17/2020] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Surgical approaches to the treatment of obesity and type 2 diabetes, most notably the Roux-en-Y gastric bypass (RYGB) procedure, have been shown to be renoprotective, reducing the incidence of albuminuria and end-stage kidney disease over 15- to 20-year follow-up in patients with obesity. The tissue level effects of metabolic surgery on the diabetic kidney are not easily interrogated in clinical samples. However, elucidation of the cellular and molecular basis for the renoprotective effects of metabolic surgery is now emerging from a body of pre-clinical work in rodent models of diabetic kidney disease (DKD). SUMMARY Experimental metabolic surgery (RYGB, sleeve gastrectomy [SG], Roux-en-Y oesophagojejunostomy, and duodenojejunal bypass) exerts a pronounced albuminuria-lowering effect in rat models of DKD. Following RYGB in the Zucker diabetic fatty rat, glomerular histology is improved as demonstrated by reductions in podocyte stress, glomerulomegaly, and glomerulosclerosis. Glomerular ultrastructure improves after RYGB and after SG, manifested by quantifiable reductions in podocyte foot process effacement. The transcriptional programme underpinning these structural improvements has been characterized at the pathway level using RNA sequencing and is associated with a significant reduction in the activation of inflammatory and fibrotic responses. Key Messages: Experimental metabolic surgery reduces biochemical, histological, and molecular indices of DKD. These pre-clinical data support a growing interest in the potential utility of metabolic surgery as a therapeutic approach to slow renal functional decline in patients with obesity and DKD.
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Affiliation(s)
- William P Martin
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, School of Medicine, University College Dublin, Dublin, Ireland,
| | - Carel W le Roux
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, School of Medicine, University College Dublin, Dublin, Ireland.,Division of Investigative Science, Imperial College London, London, United Kingdom
| | - Neil G Docherty
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, School of Medicine, University College Dublin, Dublin, Ireland
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Docherty NG, le Roux CW. Bariatric surgery for the treatment of chronic kidney disease in obesity and type 2 diabetes mellitus. Nat Rev Nephrol 2020; 16:709-720. [DOI: 10.1038/s41581-020-0323-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2020] [Indexed: 12/13/2022]
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40
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Ullah MM, Ow CPC, Evans RG, Hilliard Krause LM. Impact of choice of kinetic model for the determination of transcutaneous FITC-sinistrin clearance in rats with streptozotocin-induced type 1 diabetes. Clin Exp Pharmacol Physiol 2020; 47:1158-1168. [PMID: 32160333 DOI: 10.1111/1440-1681.13301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 03/08/2020] [Indexed: 11/28/2022]
Abstract
Transcutaneous assessment of fluorescein isothiocyanate (FITC)-sinistrin clearance using an optical device was recently validated for determination of glomerular filtration rate (GFR) in conscious animals. In the current study, we compared four available kinetic models for calculating FITC-sinistrin clearance, to provide further insight into whether the choice of model might influence findings generated using this device. Specifically, we calculated the excretion half-life of FITC-sinistrin (minutes), rate constant (minute-1 ) and GFR indexed to bodyweight in control rats and rats with streptozotocin-induced diabetes across a 4-week experimental period using standard one-compartment (1-COM), two-compartment (2-COM) and three-compartment (3-COM) kinetic models (1-COM), and a three-compartment kinetic model with baseline correction (3-COMB). Glomerular hyperfiltration was detected in STZ-induced diabetic rats with the 2-COM or 3-COMB at day 14 and with the 3-COM at day 3 and 14 after induction of diabetes, but not at any time point using the 1-COM. From a theoretical perspective, we reasoned that the 3-COMB model provides a better estimate of t1/2 than the other models. Linear regression analysis of data generated using the 3-COMB showed a significant relationship between blood glucose and calculated GFR at the day 14 (P = .004) and day 28 (P = .01) time points, and a strong tendency for a relationship at the day 3 time point (P = .06). We conclude that hyperfiltration is an early and sustained characteristic of STZ-induced diabetes in rats. Furthermore, we propose that the 3-COMB model provides the most valid t1/2 for estimation of GFR via transcutaneous detection of FITC-sinistrin clearance.
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Affiliation(s)
- Md Mahbub Ullah
- Cardiovascular Disease Program, Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Vic., Australia
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Connie P C Ow
- Cardiovascular Disease Program, Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Vic., Australia
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Roger G Evans
- Cardiovascular Disease Program, Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Vic., Australia
| | - Lucinda M Hilliard Krause
- Cardiovascular Disease Program, Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Vic., Australia
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41
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How to assess kidney function in oncology patients. Kidney Int 2020; 97:894-903. [DOI: 10.1016/j.kint.2019.12.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/20/2019] [Accepted: 12/17/2019] [Indexed: 12/24/2022]
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Mullins TP, Tan WS, Carter DA, Gallo LA. Validation of non-invasive transcutaneous measurement for glomerular filtration rate in lean and obese C57BL/6J mice. Nephrology (Carlton) 2020; 25:575-581. [PMID: 32180312 DOI: 10.1111/nep.13713] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/01/2020] [Accepted: 03/04/2020] [Indexed: 02/02/2023]
Abstract
AIM The measurement of glomerular filtration rate (GFR) in experimental rodents is pivotal to understanding the progression of kidney disease and benefits of treatment strategies. A non-invasive clearance device has been developed, which measures transcutaneous decay of injected FITC-sinistrin in conscious rodents. The technique was validated against the well-established plasma clearance method in the same mice, but on consecutive days, using only models of uninephrectomy and polycystic kidney disease. We aimed to validate this widely used technique in the same lean or obese mice, at the same time. METHODS Five-week-old male C57BL/6J mice were randomised to a high fat diet (n = 12) or normal diet (n = 11) for 10 weeks. Transcutaneous and plasma clearance of FITC-sinistrin were measured simultaneously in each mouse. RESULTS In lean mice, there was a positive correlation between transcutaneous and plasma derived GFR (P < .01, R2 = .704), although there was an approximate 40% underestimation by the transcutaneous method (P < .0001). In obese mice, no correlation was observed between transcutaneous and plasma derived GFR, nor elimination half-life which removes any effect of the conversion factor and injected dose. The limits of agreement in a Bland-Altman plot were narrower when we used new conversion factors derived from mice in the current study and, in lean mice, a generic conversion factor which assumes 20% extracellular volume. CONCLUSION The non-invasive clearance device may be useful for serial GFR measurements in lean and healthy mice, provided validation studies have been carried out, but its utility in obesity requires further study.
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Affiliation(s)
- Thomas P Mullins
- School of Biomedical Sciences, The University of Queensland, St Lucia, Australia.,Mater Research Institute-UQ, Translational Research Institute, Woolloongabba, Australia
| | - Wei Sheng Tan
- School of Biomedical Sciences, The University of Queensland, St Lucia, Australia.,Duke-NUS Medical School, Singapore, Singapore
| | - David A Carter
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Australia
| | - Linda A Gallo
- School of Biomedical Sciences, The University of Queensland, St Lucia, Australia.,Mater Research Institute-UQ, Translational Research Institute, Woolloongabba, Australia
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Gupta N, Buffa JA, Roberts AB, Sangwan N, Skye SM, Li L, Ho KJ, Varga J, DiDonato JA, Tang WHW, Hazen SL. Targeted Inhibition of Gut Microbial Trimethylamine N-Oxide Production Reduces Renal Tubulointerstitial Fibrosis and Functional Impairment in a Murine Model of Chronic Kidney Disease. Arterioscler Thromb Vasc Biol 2020; 40:1239-1255. [PMID: 32212854 DOI: 10.1161/atvbaha.120.314139] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Gut microbial metabolism of dietary choline, a nutrient abundant in a Western diet, produces trimethylamine (TMA) and the atherothrombosis- and fibrosis-promoting metabolite TMA-N-oxide (TMAO). Recent clinical and animal studies reveal that elevated TMAO levels are associated with heightened risks for both cardiovascular disease and incident chronic kidney disease development. Despite this, studies focusing on therapeutically targeting gut microbiota-dependent TMAO production and its impact on preserving renal function are limited. Approach and Results: Herein we examined the impact of pharmacological inhibition of choline diet-induced gut microbiota-dependent production of TMA, and consequently TMAO, on renal tubulointerstitial fibrosis and functional impairment in a model of chronic kidney disease. Initial studies with a gut microbial choline TMA-lyase mechanism-based inhibitor, iodomethylcholine, confirmed both marked suppression of TMA generation, and consequently TMAO levels, and selective targeting of the gut microbial compartment (ie, both accumulation of the drug in intestinal microbes and limited systemic exposure in the host). Dietary supplementation of either choline or TMAO significantly augmented multiple indices of renal functional impairment and fibrosis associated with chronic subcutaneous infusion of isoproterenol. However, the presence of the gut microbiota-targeting inhibitor iodomethylcholine blocked choline diet-induced elevation in TMAO, and both significantly improved decline in renal function, and significantly attenuated multiple indices of tubulointerstitial fibrosis. Iodomethylcholine treatment also reversed many choline diet-induced changes in cecal microbial community composition associated with TMAO and renal functional impairment. CONCLUSIONS Selective targeting of gut microbiota-dependent TMAO generation may prevent adverse renal structural and functional alterations in subjects at risk for chronic kidney disease.
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Affiliation(s)
- Nilaksh Gupta
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH
| | - Jennifer A Buffa
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH
| | - Adam B Roberts
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH
| | - Naseer Sangwan
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH
| | - Sarah M Skye
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH
| | - Lin Li
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH
| | - Karen J Ho
- Division of Vascular Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL (K.J.H)
| | - John Varga
- Division of Rheumatology, Northwestern University, Chicago, IL (J.V.)
| | - Joseph A DiDonato
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH
| | - W H Wilson Tang
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T., S.L.H.), Cleveland Clinic, OH
| | - Stanley L Hazen
- From the Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome & Human Health (N.G., J.A.B., A.B.R., N.S., S.M.S., L.L., J.A.D., W.H.W.T., S.L.H.), Cleveland Clinic, OH.,Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T., S.L.H.), Cleveland Clinic, OH
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Zhang S, Breidenbach JD, Khalaf FK, Dube PR, Mohammed CJ, Lad A, Stepkowski S, Hinds TD, Kumarasamy S, Kleinhenz A, Tian J, Malhotra D, Kennedy DJ, Cooper CJ, Haller ST. Renal Fibrosis Is Significantly Attenuated Following Targeted Disruption of Cd40 in Experimental Renal Ischemia. J Am Heart Assoc 2020; 9:e014072. [PMID: 32200719 PMCID: PMC7428653 DOI: 10.1161/jaha.119.014072] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Renal artery stenosis is a common cause of renal ischemia, contributing to the development of chronic kidney disease. To investigate the role of local CD40 expression in renal artery stenosis, Goldblatt 2‐kidney 1‐clip surgery was performed on hypertensive Dahl salt‐sensitive rats (S rats) and genetically modified S rats in which CD40 function is abolished (Cd40mutant). Methods and Results Four weeks following the 2‐kidney 1‐clip procedure, Cd40mutant rats demonstrated significantly reduced blood pressure and renal fibrosis in the ischemic kidneys compared with S rat controls. Similarly, disruption of Cd40 resulted in reduced 24‐hour urinary protein excretion in Cd40mutant rats versus S rat controls (46.2±1.9 versus 118.4±5.3 mg/24 h; P<0.01), as well as protection from oxidative stress, as indicated by increased paraoxonase activity in Cd40mutant rats versus S rat controls (P<0.01). Ischemic kidneys from Cd40mutant rats demonstrated a significant decrease in gene expression of the profibrotic mediator, plasminogen activator inhibitor‐1 (P<0.05), and the proinflammatory mediators, C‐C motif chemokine ligand 19 (P<0.01), C‐X‐C Motif Chemokine Ligand 9 (P<0.01), and interleukin‐6 receptor (P<0.001), compared with S rat ischemic kidneys, as assessed by quantitative PCR assay. Reciprocal renal transplantation documented that CD40 exclusively expressed in the kidney contributes to ischemia‐induced renal fibrosis. Furthermore, human CD40‐knockout proximal tubule epithelial cells suggested that suppression of CD40 signaling significantly inhibited expression of proinflammatory and ‐fibrotic genes. Conclusions Taken together, our data suggest that activation of CD40 induces a significant proinflammatory and ‐fibrotic response and represents an attractive therapeutic target for treatment of ischemic renal disease.
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Affiliation(s)
- Shungang Zhang
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Joshua D. Breidenbach
- Department of Medical Microbiology and ImmunologyUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Fatimah K. Khalaf
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Prabhatchandra R. Dube
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Chrysan J. Mohammed
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Apurva Lad
- Department of Medical Microbiology and ImmunologyUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Stanislaw Stepkowski
- Department of Medical Microbiology and ImmunologyUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Terry D. Hinds
- Department of Physiology and PharmacologyUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Sivarajan Kumarasamy
- Department of Physiology and PharmacologyUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Andrew Kleinhenz
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Jiang Tian
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Deepak Malhotra
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - David J. Kennedy
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Christopher J. Cooper
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
| | - Steven T. Haller
- Department of MedicineUniversity of Toledo College of Medicine and Life SciencesToledoOH
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45
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McPherson KC, Shields CA, Poudel B, Johnson AC, Taylor L, Stubbs C, Nichols A, Cornelius DC, Garrett MR, Williams JM. Altered renal hemodynamics is associated with glomerular lipid accumulation in obese Dahl salt-sensitive leptin receptor mutant rats. Am J Physiol Renal Physiol 2020; 318:F911-F921. [PMID: 32068459 DOI: 10.1152/ajprenal.00438.2019] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The present study examined whether development of renal injury in the nondiabetic obese Dahl salt-sensitive leptin receptor mutant (SSLepRmutant) strain is associated with elevations in glomerular filtration rate and renal lipid accumulation. Baseline mean arterial pressure at 6 wk of age was similar between Dahl salt-sensitive wild-type (SSWT) and SSLepRmutant rats. However, by 18 wk of age, the SSLepRmutant strain developed hypertension, while the elevation in mean arterial pressure was not as severe in SSWT rats (192 ± 4 and 149 ± 6 mmHg, respectively). At baseline, proteinuria was fourfold higher in SSLepRmutant than SSWT rats and remained elevated throughout the study. The early development of progressive proteinuria was associated with renal hyperfiltration followed by a decline in renal function over the course of study in the SSLepRmutant compared with SSWT rats. Kidneys from the SSLepRmutant strain displayed more glomerulosclerosis and glomerular lipid accumulation than SSWT rats. Glomeruli were isolated from the renal cortex of both strains at 6 and 18 wk of age, and RNA sequencing was performed to identify genes and pathways driving glomerular injury. We observed significant increases in expression of the influx lipid transporters, chemokine (C-X-C motif) ligand 16 (Cxcl16) and scavenger receptor and fatty acid translocase (Cd36), respectively, and a significant decrease in expression of the efflux lipid transporter, ATP-binding cassette subfamily A member 2 (Abca2; cholesterol efflux regulatory protein 2), in SSLepRmutant compared with SSWT rats at 6 and 18 wk of age, which were validated by RT-PCR analysis. These data suggest an association between glomerular hyperfiltration and glomerular lipid accumulation during the early development of proteinuria associated with obesity.
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Affiliation(s)
- Kasi C McPherson
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Corbin A Shields
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Bibek Poudel
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Ashley C Johnson
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Lateia Taylor
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Cassandra Stubbs
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Alyssa Nichols
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Denise C Cornelius
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi.,Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - Michael R Garrett
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Jan M Williams
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
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46
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Akison LK, Probyn ME, Gray SP, Cullen-McEwen LA, Tep K, Steane SE, Gobe GC, Wlodek ME, Bertram JF, Moritz KM. Moderate prenatal ethanol exposure in the rat promotes kidney cell apoptosis, nephron deficits, and sex-specific kidney dysfunction in adult offspring. Anat Rec (Hoboken) 2020; 303:2632-2645. [PMID: 31984647 DOI: 10.1002/ar.24370] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 10/31/2019] [Accepted: 12/07/2019] [Indexed: 12/12/2022]
Abstract
Alcohol during pregnancy can impair fetal development and result in offspring with neurodevelopmental deficits. Less is known about how low to moderate alcohol exposure can affect other organs, such as the kidney. Here, the effects of moderate ethanol exposure throughout pregnancy on kidney development were examined using a rat model. Rats were fed a liquid diet containing 6% ethanol (vol/vol) or control (0% ethanol) throughout pregnancy. Kidneys were collected at embryonic day (E) 20 or postnatal day (PN) 30 and total glomerular (nephron) number determined using unbiased stereology. Kidney function was examined in offspring at 8 and 19 months. At E20, fetuses exposed to ethanol had fewer nephrons with increased apoptosis. Alcohol exposure caused kidney dysregulation of pro- (Bax) and anti- (Bcl-2) apoptotic factors, and reduced expression of the cell proliferation marker, Ki67. Prenatal alcohol decreased expression of Gdnf and Tgfb1, important regulators of branching morphogenesis, in male fetuses. At PN30, kidney volume and nephron number were lower in offspring exposed to prenatal alcohol. Urine flow and osmolality were normal in offspring exposed to alcohol however sodium excretion tended to be lower in females prenatally exposed to alcohol. Findings suggest exposure to moderate levels of alcohol during pregnancy results in impaired kidney development and leads to a permanent nephron deficit. Although the impact on adult kidney function was relatively minor, these data highlight that even at moderate levels, alcohol consumption during pregnancy can have deleterious long-term outcomes and should be avoided.
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Affiliation(s)
- Lisa K Akison
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia.,Child Health Research Centre, The University of Queensland, Brisbane, Australia
| | - Megan E Probyn
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Stephen P Gray
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, Clayton, Australia.,Department of Anatomy and Developmental Biology, Monash University, Clayton, Australia
| | - Louise A Cullen-McEwen
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, Clayton, Australia.,Department of Anatomy and Developmental Biology, Monash University, Clayton, Australia
| | - Karrona Tep
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Sarah E Steane
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Glenda C Gobe
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Mary E Wlodek
- Department of Physiology, The University of Melbourne, Parkville, Australia
| | - John F Bertram
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, Clayton, Australia.,Department of Anatomy and Developmental Biology, Monash University, Clayton, Australia
| | - Karen M Moritz
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia.,Child Health Research Centre, The University of Queensland, Brisbane, Australia
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47
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Fu Y, Cai J, Li F, Liu Z, Shu S, Wang Y, Liu Y, Tang C, Dong Z. Chronic effects of repeated low-dose cisplatin treatment in mouse kidneys and renal tubular cells. Am J Physiol Renal Physiol 2019; 317:F1582-F1592. [PMID: 31532246 DOI: 10.1152/ajprenal.00385.2019] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Cisplatin is a commonly used chemotherapeutic drug for cancer treatment, but its nephrotoxicity may lead to the deterioration of renal function. Previous work has been focused on cisplatin-induced acute kidney disease, whereas the mechanism of chronic kidney disease after cisplatin chemotherapy is largely unknown. In the present study, we have characterized the mouse model of chronic kidney defects induced by repeated low-dose cisplatin treatment. We have also established a relevant cell culture model. In the animal model, C57 mice were given weekly injection of 8 mg/kg cisplatin for 4 wk. This led to a sustained decline of kidney function. These mice showed loss of kidney mass, interstitial fibrosis, continued activation of inflammatory cytokines, and appearance of atubular glomeruli. In the cell model, the BUMPT mouse proximal tubular cell line was treated four times with 1-2 μM cisplatin, resulting in low levels of apoptosis and the expression of fibrosis proteins and profibrotic factors. These data suggest that repeated treatment with low-dose cisplatin causes long-term renal pathologies with characteristics of chronic kidney disease.
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Affiliation(s)
- Ying Fu
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Juan Cai
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Fanghua Li
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhiwen Liu
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shaoqun Shu
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ying Wang
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuxue Liu
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chengyuan Tang
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zheng Dong
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University and Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia
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48
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Li XC, Zhu D, Chen X, Zheng X, Zhao C, Zhang J, Soleimani M, Rubera I, Tauc M, Zhou X, Zhuo JL. Proximal Tubule-Specific Deletion of the NHE3 (Na +/H + Exchanger 3) in the Kidney Attenuates Ang II (Angiotensin II)-Induced Hypertension in Mice. Hypertension 2019; 74:526-535. [PMID: 31352824 DOI: 10.1161/hypertensionaha.119.13094] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The present study directly tested the hypothesis that the NHE3 (Na+/H+ exchanger 3) in the proximal tubules of the kidney is required for the development of Ang II (angiotensin II)-induced hypertension using PT-Nhe3-/- (proximal tubule-specific NHE3 knockout) mice. Specifically, PT-Nhe3-/- mice were generated using the SGLT2-Cre/Nhe3loxlox approach, whereas Ang II-induced hypertension was studied in 12 groups (n=5-12 per group) of adult male and female wild-type (WT) and PT-Nhe3-/- mice. Under basal conditions, systolic blood pressure, diastolic blood pressure, and mean arterial blood pressure were significantly lower in male and female PT-Nhe3-/- than WT mice (P<0.01). A high pressor, 1.5 mg/kg per day, intraperitoneal or a slow pressor dose of Ang II, 0.5 mg/kg per day, intraperitoneal for 2 weeks significantly increased systolic blood pressure, diastolic blood pressure, and mean arterial blood pressure in male and female WT mice (P<0.01), but the hypertensive response to Ang II was markedly attenuated in male and female PT-Nhe3-/- mice (P<0.01). Ang II impaired the pressure-natriuresis response in WT mice, whereas proximal tubule-specific deletion of NHE3 improved the pressure-natriuresis response in Ang II-infused PT-Nhe3-/- mice (P<0.01). AT1 receptor blocker losartan completely blocked Ang II-induced hypertension in both WT and PT-Nhe3-/- mice (P<0.01). However, inhibition of nitric oxide synthase with L-NG-Nitroarginine methyl ester had no effect on Ang II-induced hypertension in WT or PT-Nhe3-/- mice (not significant). Furthermore, Ang II-induced hypertension was significantly attenuated by an orally absorbable NHE3 inhibitor AVE0657. In conclusion, NHE3 in the proximal tubules of the kidney may be a therapeutical target in hypertension induced by Ang II or with increased NHE3 expression in the proximal tubules.
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Affiliation(s)
- Xiao C Li
- From the Department of Pharmacology and Toxicology (X.C.L., D.Z., X.C., X. Zheng, C.Z., J.Z., J.L.Z.), University of Mississippi Medical Center, Jackson
- Division of Nephrology, Department of Medicine (X.C.L., J.L.Z.), University of Mississippi Medical Center, Jackson
| | - Dongmin Zhu
- From the Department of Pharmacology and Toxicology (X.C.L., D.Z., X.C., X. Zheng, C.Z., J.Z., J.L.Z.), University of Mississippi Medical Center, Jackson
- Department of Anesthesiology, Shenzhen Far East Obstetrics and Gynecology Hospital, China (D.Z.)
| | - Xu Chen
- From the Department of Pharmacology and Toxicology (X.C.L., D.Z., X.C., X. Zheng, C.Z., J.Z., J.L.Z.), University of Mississippi Medical Center, Jackson
| | - Xiaowen Zheng
- From the Department of Pharmacology and Toxicology (X.C.L., D.Z., X.C., X. Zheng, C.Z., J.Z., J.L.Z.), University of Mississippi Medical Center, Jackson
- Department of Emergency Medicine, Second Affiliated Hospital, Guangxi Medical University, Nanning, China (X. Zheng, C.Z., J.Z.)
| | - Chunling Zhao
- From the Department of Pharmacology and Toxicology (X.C.L., D.Z., X.C., X. Zheng, C.Z., J.Z., J.L.Z.), University of Mississippi Medical Center, Jackson
- Department of Emergency Medicine, Second Affiliated Hospital, Guangxi Medical University, Nanning, China (X. Zheng, C.Z., J.Z.)
| | - Jianfeng Zhang
- From the Department of Pharmacology and Toxicology (X.C.L., D.Z., X.C., X. Zheng, C.Z., J.Z., J.L.Z.), University of Mississippi Medical Center, Jackson
- Department of Emergency Medicine, Second Affiliated Hospital, Guangxi Medical University, Nanning, China (X. Zheng, C.Z., J.Z.)
| | - Manoocher Soleimani
- Division of Nephrology and Hypertension, Department of Internal Medicine, The University of Cincinnati College of Medicine, OH (M.S.)
| | - Isabelle Rubera
- Laboratoire de Physiomédecine Moléculaire, LP2M, UMR-CNRS 7370, Université Côte d'Azur, Nice Cedex 2, France (I.R., M.T.)
| | - Michel Tauc
- Laboratoire de Physiomédecine Moléculaire, LP2M, UMR-CNRS 7370, Université Côte d'Azur, Nice Cedex 2, France (I.R., M.T.)
| | - Xinchun Zhou
- Department of Pathology (X. Zhou), University of Mississippi Medical Center, Jackson
| | - Jia L Zhuo
- From the Department of Pharmacology and Toxicology (X.C.L., D.Z., X.C., X. Zheng, C.Z., J.Z., J.L.Z.), University of Mississippi Medical Center, Jackson
- Division of Nephrology, Department of Medicine (X.C.L., J.L.Z.), University of Mississippi Medical Center, Jackson
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49
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Zhou X, Muise ES, Haimbach R, Sebhat IK, Zhu Y, Liu F, Souza SC, Kan Y, Pinto S, Kelley DE, Hoek M. PAN-AMPK Activation Improves Renal Function in a Rat Model of Progressive Diabetic Nephropathy. J Pharmacol Exp Ther 2019; 371:45-55. [PMID: 31300612 DOI: 10.1124/jpet.119.258244] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 07/03/2019] [Indexed: 12/24/2022] Open
Abstract
Metabolic dysregulation and mitochondrial dysfunction are important features of acute and chronic tissue injury across species, and human genetics and preclinical data suggest that the master metabolic regulator 5'-adenosine monophosphate-activated protein kinase (AMPK) may be an effective therapeutic target for chronic kidney disease (CKD). We have recently disclosed a pan-AMPK activator, MK-8722, that was shown to have beneficial effects in preclinical models. In this study we investigated the effects of MK-8722 in a progressive rat model of diabetic nephropathy to determine whether activation of AMPK would be of therapeutic benefit. We found that MK-8722 administration in a therapeutic paradigm is profoundly renoprotective, as demonstrated by a reduction in proteinuria (63% decrease in MK-8722 10 mg/kg per day compared with vehicle group) and a significant improvement in glomerular filtration rate (779 and 430 μl/min per gram kidney weight in MK-8722 10 mg/kg per day and vehicle group, respectively), as well as improvements in kidney fibrosis. We provide evidence that the therapeutic effects of MK-8722 may be mediated by modulation of renal mitochondrial quality control as well by attenuating fibrotic and lipotoxic mechanisms in kidney cells. MK-8722 (10 mg/kg per day compared with vehicle group) achieved modest blood pressure reduction (10 mmHg lower for mean blood pressure) and significant metabolic improvements (decreased plasma glucose, triglyceride, and body weight) that could contribute to renoprotection. These data further validate the concept that targeting metabolic dysregulation in CKD could be a potential therapeutic approach. SIGNIFICANCE STATEMENT: We demonstrate in the present study that the pharmacological activation of AMPK using a small-molecule agent provided renoprotection and improved systemic and cellular metabolism. We further indicate that modulation of renal mitochondrial quality control probably contributed to renoprotection and was distinct from the effects of enalapril. Our findings suggest that improving renal mitochondrial biogenesis and function and attenuating fibrosis and lipotoxicity by targeting key metabolic nodes could be a potential therapeutic approach in management of CKD that could complement the current standard of care.
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Affiliation(s)
- Xiaoyan Zhou
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Eric S Muise
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Robin Haimbach
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Iyassu K Sebhat
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Yonghua Zhu
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Franklin Liu
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Sandra C Souza
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Yanqing Kan
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Shirly Pinto
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - David E Kelley
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
| | - Maarten Hoek
- Department of Cardiometabolic Diseases (X.Z., R.H., Y.Z., F.L., S.C.S., Y.K., S.P., D.E.K., M.H.), Genetics and Pharmacogenomics (E.S.M.), and Medicinal Chemistry (I.K.S.), Merck & Co., Inc., Kenilworth, New Jersey
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50
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Cippà PE, Liu J, Sun B, Kumar S, Naesens M, McMahon AP. A late B lymphocyte action in dysfunctional tissue repair following kidney injury and transplantation. Nat Commun 2019; 10:1157. [PMID: 30858375 PMCID: PMC6411919 DOI: 10.1038/s41467-019-09092-2] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 02/20/2019] [Indexed: 12/24/2022] Open
Abstract
The mechanisms initiating late immune responses to an allograft are poorly understood. Here we show, via transcriptome analysis of serial protocol biopsies from kidney transplants, that the initial responses to kidney injury correlate with a late B lymphocyte signature relating to renal dysfunction and fibrosis. With a potential link between dysfunctional repair and immunoreactivity, we investigate the immunological consequences of dysfunctional repair examining chronic disease in mouse kidneys 18 months after a bilateral ischemia/reperfusion injury event. In the absence of foreign antigens, a sustained immune response involving both innate and adaptive immune systems accompanies a transition to chronic kidney damage. At late stages, B lymphocytes exhibite an antigen-driven proliferation, selection and maturation into broadly-reacting antibody-secreting cells. These findings reveal a previously unappreciated role for dysfunctional tissue repair in local immunomodulation that may have particular relevance to transplant-associated immunobiology.
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Affiliation(s)
- Pietro E Cippà
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, 90033-9080, CA, USA.
- Division of Nephrology, Regional Hospital Lugano, Lugano, 6900, Switzerland.
| | - Jing Liu
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, 90033-9080, CA, USA
| | - Bo Sun
- Molecular and Computational Biology, University of Southern California, Los Angeles, 90089-2910, CA, USA
| | - Sanjeev Kumar
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, 90033-9080, CA, USA
| | - Maarten Naesens
- Department of Microbiology and Immunology, KU Leuven, Leuven, 3000, Belgium
- Department of Nephrology and Kidney Transplantation, University Hospitals Leuven, Leuven, 3000, Belgium
| | - Andrew P McMahon
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of Southern California, Los Angeles, 90033-9080, CA, USA.
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