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Cheng ZY, Chen PK, Feng YZ, Chen XQ, Qian L, Cai XR. Preliminary Feasibility Study on Diffusion Kurtosis Imaging to Monitor the Early Functional Alterations of Kidneys in Streptozocin-Induced Diabetic Rats. Acad Radiol 2023; 30:1544-1551. [PMID: 36244869 DOI: 10.1016/j.acra.2022.09.016] [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: 06/30/2022] [Revised: 09/16/2022] [Accepted: 09/17/2022] [Indexed: 11/30/2022]
Abstract
RATIONALE AND OBJECTIVES The aim of this study was to investigate the potential of diffusion kurtosis imaging (DKI) to assess the early renal functional undulation of diabetic mellitus (DM). MATERIALS AND METHODS Fifty-seven Sprague-Dawley (SD) rats were randomly divided into two groups and eventually 48 rats were included in this study: the normal control (CON) group and diabetic mellitus (DM) group. Weeks 0, 4, 8, and 12 after the diabetes model was successfully established, all the rats were scanned on the 3.0T MRI. The DKI derived parameters of renal parenchyma, including fractional anisotropy (FAco, FAme), mean diffusivity (MDco, MDme), and mean kurtosis (MKco, MKme) were measured. Their alteration over time was analyzed and then correlated with urine volume (UV), blood urea nitrogen (BUN), and serum creatinine (Scr) using Pearson correlation analysis. Finally, hematoxylin and eosin (H&E) staining was performed on the kidneys of the two groups. RESULT There was a decreasing trend in FA, MK, and MD values over time in diabetic rats. Also, the gradually worsening histological damage of kidneys was noted over time in diabetic rats. The cortical FA and MK values and medullary FA, MK and MD values of diabetic rats were significantly lower than those of controls at most time points after DM induction. In addition, negative correlations were revealed between the BUN and FAco (r = -0.43, p = 0.03) or FAme value (r = -0.49, p = 0.01). The cortical MK value was moderately correlated with UV (r = -0.46, p = 0.03) and BUN (r = -0.55, p = 0.01). CONCLUSION The preliminary findings suggest that DKI might be an effective and sensitive tool to assess the early changes of renal function impairment in diabetic rats. The FA values of the cortex and medulla and the MK value of the cortex are sensitive markers in detecting renal injury in diabetic rats.
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Affiliation(s)
- Zhong-Yuan Cheng
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, Guangdong 510630, China
| | - Ping-Kang Chen
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, Guangdong 510630, China
| | - You-Zhen Feng
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, Guangdong 510630, China
| | - Xiao-Qiao Chen
- Radiology Department, Shenzhen Mental Health Center, Shenzhen Kangning Hospital, Shenzhen, Guangdong, China
| | - Long Qian
- Department of Biomedical Engineering, Peking University, Beijing, 100871, China
| | - Xiang-Ran Cai
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, Guangdong 510630, China.
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Short-Term Treatment of Metformin and Glipizide on Oxidative Stress, Lipid Profile and Renal Function in a Rat Model with Diabetes Mellitus. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12042019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Background: Oxidative stress, lipid profile and renal functions are well-known conventional risk factors for diabetes mellitus (DM). Metformin and gliclazide are popularly used monotherapy drugs for the treatment of DM. Aims: This study aims to assess the short-term treatment of single and dual therapy of glipizide/metformin on oxidative stress, glycemic control, serum lipid profiles and renal function in diabetic rats. Methods: DM was induced in rats with streptozotocin (STZ), then five different treatments were applied, including group I (untreated healthy control), group II (diabetic and untreated), group III (diabetic and treated with metformin), group IVI (diabetic and treated with glipizide) and group V (diabetic and treated with a combination of metformin and glipizide. Lipid peroxidation (LPO), nitric oxide (NO), total antioxidant capacity (TAC), fasting blood glucose (FBG), glycated hemoglobin (HbA1c), total cholesterol, triglycerides, high-density lipoprotein (HDL), low-density lipoprotein (LDL), creatinine and urea were measured. Results: Compared to the untreated DM group, FBG and HbA1c were significantly reduced in the DM groups (p < 0.01) treated with metformin (159.7 mg/dL & 6.7%), glipizide (184.3 mg/dL & 7.3%) and dual therapy (118 mg/dL & 5.2%), respectively. Treatment with dual therapy and metformin significantly decreased LPO and NO levels but increased TAC in diabetic rats more than glipizide compared to untreated diabetic rats. Furthermore, metformin (19.8 mg/dL, p < 0.001), glipizide (22.7 mg/dL, p < 0.001), and dual therapy (25.7 mg/dL, p < 0.001) significantly decreased urea levels in the treated rats compared to untreated DM rats (32.2 mg/dL). Both drugs and their combination exhibited a substantial effect on total cholesterol, HDL, LDL and atherogenic index. Conclusions: These results suggest that the therapeutic benefits of metformin and glipizide are complementary. Metformin exhibited superior performance in improving glycemic control and decreasing oxidative stress, while glipizide was more effective against dyslipidemia. These findings could be helpful for the treatment of future vascular patients, antilipidemic medicines and antioxidant therapy to improve the quality of life.
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Feng YZ, Chen XQ, Cheng ZY, Lin QT, Chen PK, Si-Tu DK, Cao R, Qian L, Heng B, Cai XR. Non-invasive investigation of early kidney damage in streptozotocin-induced diabetic rats by intravoxel incoherent motion diffusion-weighted (IVIM) MRI. BMC Nephrol 2021; 22:321. [PMID: 34565330 PMCID: PMC8474753 DOI: 10.1186/s12882-021-02530-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 09/10/2021] [Indexed: 11/21/2022] Open
Abstract
Background The current study investigated the performance of intravoxel incoherent motion diffusion (IVIM) technology in monitoring early renal injury in streptozotocin rats. Methods Forty-eight Sprague-Dawley (SD) rats were divided into a control group and a diabetic mellitus (DM) group. Six rats in each group were randomly selected for MR scans at four different time points (0, 4, 8, and 12 weeks). The IVIM-derived parameters (D, D*, f and ADC values) of the renal cortex (CO), outer and inner stripe of the outer medulla (OS, IS), and internal medulla (IM) were acquired. Changes in each IVIM-derived parameter over time were analyzed, and differences between the two groups at each point were assessed. The associations between the IVIM parameters and IV collagen expression, urine volume (UV), blood urea nitrogen (BUN), and serum creatinine (Scr) were investigated. Results The D and D* values of CO and the ADC values of CO, OS, IS and IM displayed significantly different trends between the two groups over time (P<0.05). In addition, significant correlations were discovered between the D* value of CO and UV and BUN (r=0.527, P=0.033; r=0.617, P=0.005), between the ADC value of IM and BUN (r=0.557, P=0.019) and between the f value of IM and BUN (r=0.527, P=0.033). No correlation was found between IVIM parameters and IV collagen expression and Scr. Conclusions IVIM is a potential sensitive and noninvasive technology for the simultaneous assessment of early renal cortical and medullary injuries induced by diabetes. Supplementary Information The online version contains supplementary material available at 10.1186/s12882-021-02530-8.
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Affiliation(s)
- You-Zhen Feng
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, 510630, Guangdong, China
| | - Xiao-Qiao Chen
- Medical Imaging Center, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, Guangdong, China
| | - Zhong-Yuan Cheng
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, 510630, Guangdong, China
| | - Qi-Ting Lin
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, 510630, Guangdong, China
| | - Ping-Kang Chen
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, 510630, Guangdong, China
| | - Ding-Kun Si-Tu
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, 510630, Guangdong, China
| | - Rui Cao
- Nephrology Department, Jinan University First Affiliated Hospital, Guangzhou, Guangdong, China
| | - Long Qian
- GE Healthcare, Beijing, China.,Department of Biomedical Engineering, Peking University, Beijing, 100871, China
| | - Baoli Heng
- Yingde Base, Institute of Kidney Surgery, Jinan University, Guangzhou, Guangdong, China.,Department of Urology, Jinan University First Affiliated Hospital, Guangzhou, China
| | - Xiang-Ran Cai
- Medical Imaging Center, Jinan University First Affiliated Hospital, No.613 West Huangpu Avenue, Tianhe District, Guangzhou, 510630, Guangdong, China.
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Perspectives on the Role of Magnetic Resonance Imaging (MRI) for Noninvasive Evaluation of Diabetic Kidney Disease. J Clin Med 2021; 10:jcm10112461. [PMID: 34199385 PMCID: PMC8199575 DOI: 10.3390/jcm10112461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/27/2021] [Accepted: 05/28/2021] [Indexed: 01/09/2023] Open
Abstract
Renal magnetic resonance imaging (MRI) techniques are currently in vogue, as they provide in vivo information on renal volume, function, metabolism, perfusion, oxygenation, and microstructural alterations, without the need for exogenous contrast media. New imaging biomarkers can be identified using these tools, which represent a major advance in the understanding and study of the different pathologies affecting the kidney. Diabetic kidney disease (DKD) is one of the most important diseases worldwide due to its high prevalence and impact on public health. However, its multifactorial etiology poses a challenge for both basic and clinical research. Therefore, the use of novel renal MRI techniques is an attractive step forward in the comprehension of DKD, both in its pathogenesis and in its detection and surveillance in the clinical practice. This review article outlines the most promising MRI techniques in the study of DKD, with the purpose of stimulating their clinical translation as possible tools for the diagnosis, follow-up, and monitoring of the clinical impacts of new DKD treatments.
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Zheng SS, He YM, Lu J. Noninvasive evaluation of diabetic patients with high fasting blood glucose using DWI and BOLD MRI. Abdom Radiol (NY) 2021; 46:1659-1669. [PMID: 32997155 DOI: 10.1007/s00261-020-02780-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/10/2020] [Accepted: 09/21/2020] [Indexed: 12/19/2022]
Abstract
PURPOSE To investigate the renal microstructure changes and hypoxia changes in type 2 diabetic patients and the relationship between them and glucose using both diffusion-weighted imaging (DWI) and blood oxygenation level-dependent magnetic resonance imaging (BOLD MRI). METHODS After measuring morning fasting blood glucose, DWI and BOLD MRI were performed in 57 patients with type 2 diabetes mellitus (DM group) and 14 healthy volunteers (NC group). According to the fasting blood glucose levels, diabetic patients were divided into a normoglycemic diabetes group (group A), a less hyperglycemic diabetes group (group B) and a more hyperglycemic diabetes group (group C). The renal parenchymal apparent diffusion coefficient (ADC), renal cortical R2* (CR2*), and medullary R2* (MR2*) were measured, and the R2* ratio between the medulla and cortex (MCR) was calculated. To test for differences in ADC, R2*, and MCR among the four groups, the data were analyzed by separate one-way ANOVAs. The correlations between ADC, R2*, and MCR and the clinical index of renal function were analyzed. RESULTS Groups B and C had significantly lower ADC values in the renal parenchyma (P = 0.048, 0.002) and significantly higher MR2* and MCR values (P < 0.000, P = 0.001, 0.001, and 0.005, respectively) than the NC group. ADC was negatively correlated with glucose, and MR2*, MCR and glucose showed a weak positive correlation. CONCLUSION DWI and BOLD may indirectly and qualitatively reflect the kidney microstructure status and hypoxia level of diabetic patients at different blood glucose levels to a certain extent, and possibly guide the clinical treatment of diabetic patients with different blood glucose levels.
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Affiliation(s)
- Shuang-Shuang Zheng
- Department of Radiology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
- Department of Radiology, Fuxing Hospital, Capital Medical University, Beijing, 100038, China
| | - Yue-Ming He
- Department of Radiology, Fuxing Hospital, Capital Medical University, Beijing, 100038, China
| | - Jie Lu
- Department of Radiology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
- Department of Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
- Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing, 100053, China.
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Wang Y, Zhang X, Wang B, Xie Y, Wang Y, Jiang X, Wang R, Ren K. Evaluation of Renal Pathophysiological Processes Induced by an Iodinated Contrast Agent in a Diabetic Rabbit Model Using Intravoxel Incoherent Motion and Blood Oxygenation Level-Dependent Magnetic Resonance Imaging. Korean J Radiol 2020; 20:830-843. [PMID: 30993934 PMCID: PMC6470079 DOI: 10.3348/kjr.2018.0757] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 01/03/2019] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE To examine the potential of intravoxel incoherent motion (IVIM) and blood oxygen level-dependent (BOLD) magnetic resonance imaging for detecting renal changes after iodinated contrast-induced acute kidney injury (CI-AKI) development in a diabetic rabbit model. MATERIALS AND METHODS Sixty-two rabbits were randomized into 2 groups: diabetic rabbits with the contrast agent (DCA) and healthy rabbits with the contrast agent (NCA). In each group, 6 rabbits underwent IVIM and BOLD imaging at 1 hour, 1 day, 2 days, 3 days, and 4 days after an iohexol injection while 5 rabbits were selected to undergo blood and histological examinations at these specific time points. Iohexol was administrated at a dose of 2.5 g I/kg of body weight. Further, the apparent transverse relaxation rate (R2*), average pure molecular diffusion coefficient (D), pseudo-diffusion coefficient (D*), and perfusion fraction (f) were calculated. RESULTS The D and f values of the renal cortex (CO) and outer medulla (OM) were significantly decreased compared to baseline values in the 2 groups 1 day after the iohexol injection (p < 0.05). A marked reduction in the D* values for both the CO and OM was also observed after 1 hour in each group (p < 0.05). In the OM, a persistent elevation of the R2* was detected for 4 days in the DCA group (p < 0.05). Histopathological changes were prominent, and the pathological features of CI-AKI aggravated in the DCA group until day 4. The D, f, and R2* values significantly correlated with the histological damage scores, hypoxia-inducible transcription factor-1α expression scores, and serum creatinine levels. CONCLUSION A combination of IVIM and BOLD imaging may serve as a noninvasive method for detecting and monitoring CI-AKI in the early stages in the diabetic kidney.
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Affiliation(s)
- Yongfang Wang
- Department of Radiology, First Hospital of China Medical University, Shenyang, China
| | - Xin Zhang
- Department of Radiology, First Hospital of China Medical University, Shenyang, China
| | - Bin Wang
- Department of Radiology, First Hospital of Shanxi Medical University, Taiyuan, China
| | - Yang Xie
- Department of Radiology, First Hospital of China Medical University, Shenyang, China
| | - Yi Wang
- Department of Radiology, The Qianfoshan Hospital of Shandong Province, Jinan, China
| | - Xuan Jiang
- Cardiac Surgery, First Hospital of China Medical University, Shenyang, China
| | - Rongjia Wang
- Department of Radiology, First Hospital of China Medical University, Shenyang, China
| | - Ke Ren
- Department of Radiology, First Hospital of China Medical University, Shenyang, China.
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Gong W, Li J, Chen W, Feng F, Deng Y. Resveratrol Inhibits Lipopolysaccharide-Induced Extracellular Matrix Accumulation and Inflammation in Rat Glomerular Mesangial Cells by SphK1/S1P2/NF-κB Pathway. Diabetes Metab Syndr Obes 2020; 13:4495-4505. [PMID: 33262625 PMCID: PMC7686914 DOI: 10.2147/dmso.s278267] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 10/28/2020] [Indexed: 12/24/2022] Open
Abstract
PURPOSE Chronic inflammation plays a key role in the pathogenesis of various diseases such as diabetic nephropathy (DN). Resveratrol (RSV), a natural polyphenol, has been proven to have renoprotective effects. In this study, we used a lipopolysaccharide (LPS)-induced rat glomerular mesangial cells (RMCs) model, to elucidate the renoprotective effect of RSV on sphingosine kinase 1 (SphK1)/sphingosine 1-phosphate receptor 2 (S1P2)/NF-κB activation and the expression of downstream inflammatory mediators, such as intercellular adhesion molecule-1 (ICAM-1), inducible nitric oxide synthase (iNOS) and fibronectin (FN) protein expression in RMCs. METHODS Cell proliferation was tested by 3-(4, 5-dimethylthiazol-2-yl)-2, 5- diphenyltetrazolium bromide (MTT). The protein levels of FN, ICAM-1, iNOS, SphK1, S1P2 and NF-κB p65 in RMCs were detected by Western blot. The DNA-binding activity of NF-κB was detected by electrophoretic mobility shift assay (EMSA). SphK1 activity and S1P content were measured by using sphingosine kinase activity assay kit and ELISA assay, respectively. RESULTS We first found that LPS could stimulate SphK1/S1P axis activation, whereas this occurrence was significantly blocked by RSV pretreatment. RSV obviously repressed LPS-induced upregulated expression of fibronectin (FN), intercellular adhesion molecule-1 (ICAM-1) and inducible nitric oxide synthase (iNOS) in RMCs. Moreover, RSV markedly reduced SphK1 activity and its protein expression, and attenuated S1P content in LPS-induced RMCs. Furthermore, RSV could block LPS-induced upregulation of NF-κB p65 and DNA-binding activity of NF-κB. And this phenomenon was notably attenuated by SphK1 inhibitor and S1P2 inhibitor. CONCLUSION RSV inhibited LPS-induced RMCs' proliferation and inflammation and FN expression by SphK1/S1P2/NF-κB pathway, suggesting that RSV may be independent of its hypoglycemic effect on preventing or delaying the development of mesangial cell fibrosis.
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Affiliation(s)
- Wenyan Gong
- Department of Cardiology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou310000, People’s Republic of China
| | - Jie Li
- Medical Research Center, Guangdong Second Provincial General Hospital, Guangzhou510317, People’s Republic of China
| | - Wenying Chen
- Department of Pharmacy, The Third Affiliated Hospital of Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Fuzhen Feng
- Department of Pharmacy, The Third Affiliated Hospital of Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Yanhui Deng
- Department of Pharmacy, The Third Affiliated Hospital of Southern Medical University, Guangzhou510630, People’s Republic of China
- Correspondence: Yanhui DengDepartment of Pharmacy, The Third Affiliated Hospital of Southern Medical University, Guangzhou510630, People’s Republic of ChinaTel +86 20 62784810 Email
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Emans TW, Janssen BJ, Joles JA, Krediet CP. Nitric Oxide Synthase Inhibition Induces Renal Medullary Hypoxia in Conscious Rats. J Am Heart Assoc 2018; 7:e009501. [PMID: 30371226 PMCID: PMC6201463 DOI: 10.1161/jaha.118.009501] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/18/2018] [Indexed: 12/14/2022]
Abstract
Background Renal hypoxia, implicated as crucial factor in onset and progression of chronic kidney disease, may be attributed to reduced nitric oxide because nitric oxide dilates vasculature and inhibits mitochondrial oxygen consumption. We hypothesized that chronic nitric oxide synthase inhibition would induce renal hypoxia. Methods and Results Oxygen-sensitive electrodes, attached to telemeters, were implanted in either renal cortex (n=6) or medulla (n=7) in rats. After recovery and stabilization, baseline oxygenation ( pO 2) was recorded for 1 week. To inhibit nitric oxide synthase, N-ω-nitro-l-arginine (L-NNA; 40 mg/kg/day) was administered via drinking water for 2 weeks. A separate group (n=8), instrumented with blood pressure telemeters, followed the same protocol. L-NNA rapidly induced hypertension (165±6 versus 108±3 mm Hg; P<0.001) and proteinuria (79±12 versus 17±2 mg/day; P<0.001). Cortical pO 2, after initially dipping, returned to baseline and then increased. Medullary pO 2 decreased progressively (up to -19±6% versus baseline; P<0.05). After 14 days of L-NNA, amplitude of diurnal medullary pO 2 was decreased (3.7 [2.2-5.3] versus 7.9 [7.5-8.4]; P<0.01), whereas amplitudes of blood pressure and cortical pO 2 were unaltered. Terminal glomerular filtration rate (1374±74 versus 2098±122 μL/min), renal blood flow (5014±336 versus 9966±905 μL/min), and sodium reabsorption efficiency (13.0±0.8 versus 22.8±1.7 μmol/μmol) decreased (all P<0.001). Conclusions For the first time, we show temporal development of renal cortical and medullary oxygenation during chronic nitric oxide synthase inhibition in unrestrained conscious rats. Whereas cortical pO 2 shows transient changes, medullary pO 2 decreased progressively. Chronic L-NNA leads to decreased renal perfusion and sodium reabsorption efficiency, resulting in progressive medullary hypoxia, suggesting that juxtamedullary nephrons are potentially vulnerable to prolonged nitric oxide depletion.
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Affiliation(s)
- Tonja W. Emans
- Internal Medicine‐NephrologyAmsterdam UMC / Academic Medical Centre at the University of AmsterdamThe Netherlands
- Nephrology and HypertensionUniversity Medical Centre UtrechtThe Netherlands
| | - Ben J. Janssen
- Pharmacology and ToxicologyMaastricht UniversityThe Netherlands
| | - Jaap A. Joles
- Nephrology and HypertensionUniversity Medical Centre UtrechtThe Netherlands
| | - C.T. Paul Krediet
- Internal Medicine‐NephrologyAmsterdam UMC / Academic Medical Centre at the University of AmsterdamThe Netherlands
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Liu J, Han Z, Chen G, Li Y, Zhang J, Xu J, van Zijl PCM, Zhang S, Liu G. CEST MRI of sepsis-induced acute kidney injury. NMR IN BIOMEDICINE 2018; 31:e3942. [PMID: 29897643 DOI: 10.1002/nbm.3942] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/15/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
Sepsis-induced acute kidney injury (SAKI) is a major complication of kidney disease associated with increased mortality and faster progression. Therefore, the development of imaging biomarkers to detect septic AKI is of great clinical interest. In this study, we aimed to characterize the endogenous chemical exchange saturation transfer (CEST) MRI contrast in the lipopolysaccharide (LPS)-induced SAKI mouse model and to investigate the use of CEST MRI for detecting such injury. We used a SAKI mouse model that was generated by i.p. injection of 10 mg/kg LPS. The resulting kidney injury was confirmed by the elevation of serum creatinine and histology. MRI assessments were performed 24 h after LPS injection, including CEST MRI at different B1 strengths (1, 1.8 and 3 μT), T1 mapping, T2 mapping and conventional magnetization transfer contrast (MTC) MRI. The CEST MRI results were analyzed using Z-spectra, in which the normalized water signal saturation (Ssat /S0 ) is measured as a function of saturation frequency. Substantial decreases in CEST contrast were observed at both 3.5 and - 3.5 ppm frequency offset from water at all B1 powers, with the most significant difference obtained at a B1 of 1.8 μT. The average Ssat /S0 differences between injured and normal kidneys were 0.07 (0.55 ± 0.04 versus 0.62 ± 0.04, P = 0.0028) and 0.07 (0.50 ± 0.04 versus 0.57 ± 0.03, P = 0.0008) for 3.5 and - 3.5 ppm, respectively. In contrast, the T1 and T2 relaxation times and MTC contrast in the injured kidneys did not show a significant change compared with the normal control. Our results showed that CEST MRI is more sensitive to the pathological changes in injured kidneys than the changes in T1 , T2 and MTC effect, indicating its potential clinical utility for molecular imaging of renal diseases.
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Affiliation(s)
- Jing Liu
- Graduate College, Southern Medical University, Guangzhou, Guangdong, China
- Department of Radiology, Guangdong Provincial People's Hospital/Guangdong General Hospital, Guangzhou, Guangdong, China
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Zheng Han
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Guoli Chen
- Department of Pathology and Laboratory Medicine, Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Yuguo Li
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jia Zhang
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jiadi Xu
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Peter C M van Zijl
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Shuixing Zhang
- Graduate College, Southern Medical University, Guangzhou, Guangdong, China
- Department of Radiology, Guangdong Provincial People's Hospital/Guangdong General Hospital, Guangzhou, Guangdong, China
- Department of Radiology, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Guanshu Liu
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
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Schley G, Jordan J, Ellmann S, Rosen S, Eckardt KU, Uder M, Willam C, Bäuerle T. Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology. PLoS One 2018; 13:e0200259. [PMID: 30011301 PMCID: PMC6047786 DOI: 10.1371/journal.pone.0200259] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 06/24/2018] [Indexed: 12/27/2022] Open
Abstract
Objectives In human chronic kidney disease (CKD) the extent of renal tubulointerstitial fibrosis correlates with progressive loss of renal function. However, fibrosis can so far only be assessed by histology of kidney biopsies. Magnetic resonance imaging (MRI) can provide information about tissue architecture, but its potential to assess fibrosis and inflammation in diseased kidneys remains poorly defined. Materials and methods We evaluated excised kidneys in a murine adenine-induced nephropathy model for CKD by MRI and correlated quantitative MRI parameters (T1, T2, and T2* relaxation times, apparent diffusion coefficient and fractional anisotropy) with histological hallmarks of progressive CKD, including renal fibrosis, inflammation, and microvascular rarefaction. Furthermore, we analyzed the effects of paraformaldehyde fixation on MRI parameters by comparing kidney samples before and after fixation with paraformaldehyde. Results In diseased kidneys T2 and T2* relaxation times, apparent diffusion coefficient and fractional anisotropy in the renal cortex and/or outer medulla were significantly different from those in control kidneys. In particular, T2 relaxation time was the best parameter to distinguish control and CKD groups and correlated very well with the extent of fibrosis, inflammatory infiltrates, tubular dilation, crystal deposition, and loss of peritubular capillaries and normal tubules in the renal cortex and outer medulla. Fixation with paraformaldehyde had no impact on T2 relaxation time and fractional anisotropy, whereas T1 times significantly decreased and T2* times and apparent diffusion coefficients increased in fixed kidney tissue. Conclusions MRI parameters provide a promising approach to quantitatively assess renal fibrosis and inflammation in CKD. Especially T2 relaxation time correlates well with histological features of CKD and is not influenced by paraformaldehyde fixation of kidney samples. Thus, T2 relaxation time might be a candidate parameter for non-invasive assessment of renal fibrosis in human patients.
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Affiliation(s)
- Gunnar Schley
- Department of Nephrology and Hypertension, Friedrich-Alexander University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
- * E-mail:
| | - Jutta Jordan
- Department of Radiology, Friedrich-Alexander University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Stephan Ellmann
- Department of Radiology, Friedrich-Alexander University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Seymour Rosen
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Kai-Uwe Eckardt
- Department of Nephrology and Hypertension, Friedrich-Alexander University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
- Department of Nephrology and Medical Intensive Care, Charité –Universitätsmedizin Berlin, Berlin, Germany
| | - Michael Uder
- Department of Radiology, Friedrich-Alexander University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Carsten Willam
- Department of Nephrology and Hypertension, Friedrich-Alexander University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Tobias Bäuerle
- Department of Radiology, Friedrich-Alexander University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
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11
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Effect of Repeated Injection of Iodixanol on Renal Function in Healthy Wistar Rats Using Functional MRI. BIOMED RESEARCH INTERNATIONAL 2018; 2018:7272485. [PMID: 29850557 PMCID: PMC5904815 DOI: 10.1155/2018/7272485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 11/13/2017] [Accepted: 02/01/2018] [Indexed: 11/24/2022]
Abstract
Purpose To determine the optimal time interval of repeated intravenous injections of iodixanol in rat model and to identify the injury location and causes of renal damage in vivo. Materials and Methods Rats were randomly divided into Control group, Group 1 with one iodixanol injection, and Group 2 with two iodixanol injections. Group 2 was subdivided into 3 cohorts according to the interval between the first and second iodixanol injections as 1, 3, and 5 days, respectively. Blood oxygen level-dependent (BOLD) imaging and diffusion weighted imaging (DWI) were performed at 1 hour, 1 day, 3 days, 5 days, and 10 days after the application of solutions. Results Compared with Group 1 (7.2%), Group 2 produced a remarkable R2⁎ increment at the inner stripe of the renal outer medulla by 15.37% (P = 0.012), 14.83% (P = 0.046), and 13.53% (P > 0.05), respectively, at 1 hour after repeated injection of iodixanol. The severity of BOLD MRI to detect renal hypoxia was consistent with the expression of HIF-1α and R2⁎ was well correlated with HIF-1α expression (r = 0.704). The acute tubular injury was associated with urinary NGAL and increased significantly at 1 day. Conclusions Repetitive injection of iodixanol within a short time window can induce acute kidney injury, the impact of which on renal damage in rats disappears gradually 3–5 days after the injections.
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Battault S, Meziat C, Nascimento A, Braud L, Gayrard S, Legros C, De Nardi F, Drai J, Cazorla O, Thireau J, Meyer G, Reboul C. Vascular endothelial function masks increased sympathetic vasopressor activity in rats with metabolic syndrome. Am J Physiol Heart Circ Physiol 2018; 314:H497-H507. [DOI: 10.1152/ajpheart.00217.2017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sylvain Battault
- Laboratoire de Pharm-Ecologie Cardiovasculaire, Avignon University, Avignon, France
| | - Cindy Meziat
- Laboratoire de Pharm-Ecologie Cardiovasculaire, Avignon University, Avignon, France
| | | | - Laura Braud
- EB2M-PROTEE, Université de Toulon, La Garde, France
| | - Sandrine Gayrard
- Laboratoire de Pharm-Ecologie Cardiovasculaire, Avignon University, Avignon, France
| | - Christian Legros
- Laboratoire de Biologie Neurovasculaire et Mitochondriale Intégrée, Université d'Angers, Angers, France
| | - Frederic De Nardi
- Laboratoire de Biologie Neurovasculaire et Mitochondriale Intégrée, Université d'Angers, Angers, France
| | - Jocelyne Drai
- Fédération de Biochimie, Unité de Biochimie Métabolique et Moléculaire, Centre Hospitalier Lyon-Sud, Pierre-Bénite, France
| | - Olivier Cazorla
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, Montpellier, France
| | - Jérôme Thireau
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, Montpellier, France
| | - Gregory Meyer
- Laboratoire de Pharm-Ecologie Cardiovasculaire, Avignon University, Avignon, France
| | - Cyril Reboul
- Laboratoire de Pharm-Ecologie Cardiovasculaire, Avignon University, Avignon, France
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13
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Wang Y, Ren K, Liu Y, Sun WG, Wang JH, Zhang X, Wu CH. Application of BOLD MRI and DTI for the evaluation of renal effect related to viscosity of iodinated contrast agent in a rat model. J Magn Reson Imaging 2017; 46:1320-1331. [PMID: 28248433 DOI: 10.1002/jmri.25683] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Accepted: 02/06/2017] [Indexed: 12/26/2022] Open
Abstract
PURPOSE To evaluate the effects of viscosity of contrast agent (CA) on intrarenal oxygenation and diffusion as measured by blood oxygenation level-dependent (BOLD) magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) in a rat model. MATERIALS AND METHODS Radiocontrast iodixanol formulated in three viscosities were designated 270, 320, and 350 (mg iodine/mL). Sixty-three male Wistar rats were divided into four groups. Saline and iodixanol (4 g iodine/kg) were administered. MR images were acquired on a 3.0T scanner at baseline and at 1 hour, 24 hours, 48 hours, and 72 hours postinjection of solutions. BOLD-MRI was performed with a multiple gradient-recalled-echo sequence. The changes in R2*, apparent diffusion coefficient (ADC), fractional anisotropy (FA), histology, and hypoxia-inducible factor-1α (HIF-1α) immunoexpression were evaluated. The R2*, ADC, and FA values were normalized to baseline to calculate ΔR2*, ΔADC, and ΔFA. RESULTS Compared with baseline levels, distinct elevation of ΔR2* (P < 0.05) and obvious decrease in ΔADC (P < 0.01) and ΔFA (P < 0.05) were observed in all the anatomical compartments at 1 hour after administration of CA. The absolute values in ΔR2*, ΔADC, and ΔFA increased with increases in CA viscosity, and differed significantly between the CA groups in renal cortex (CO), outer stripe of outer medulla (OSOM), and inner stripe of outer medulla (ISOM) (all P < 0.05). A significant positive correlation was observed between ΔR2* and HIF-1α expression (P < 0.001, r = 0.75). Significant negative correlations were observed between ΔADC, ΔFA, and pathologies in CO, OSOM, ISOM (all P < 0.001, r = -0.68-0.87; all P < 0.001, r = -0.60-0.66). CONCLUSION The effect of CA viscosity on intrarenal oxygenation and diffusion was viscosity-dependent, and was identified using BOLD-MRI and DTI. LEVEL OF EVIDENCE 1 Technical Efficacy: Stage 3 J. Magn. Reson. Imaging 2017;46:1320-1331.
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Affiliation(s)
- Yi Wang
- Department of Radiology, First Hospital of China Medical University, Shenyang, P.R. China.,Key Laboratory of Imaging Diagnosis and Interventional Radiology of Liaoning Province, Shenyang, P.R. China
| | - Ke Ren
- Department of Radiology, First Hospital of China Medical University, Shenyang, P.R. China
| | - Yi Liu
- Department of Radiology, First Hospital of China Medical University, Shenyang, P.R. China
| | - Wen-Ge Sun
- Department of Radiology, First Hospital of China Medical University, Shenyang, P.R. China
| | - Jia-Huan Wang
- Department of Radiology, First Hospital of China Medical University, Shenyang, P.R. China
| | - Xin Zhang
- Department of Radiology, First Hospital of China Medical University, Shenyang, P.R. China.,Key Laboratory of Imaging Diagnosis and Interventional Radiology of Liaoning Province, Shenyang, P.R. China
| | - Cheng-Hua Wu
- Department of Radiology, First Hospital of China Medical University, Shenyang, P.R. China.,Key Laboratory of Imaging Diagnosis and Interventional Radiology of Liaoning Province, Shenyang, P.R. China
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Abstract
PURPOSE OF REVIEW Over the past decade, a variety of MRI methods have been developed and applied to many kidney diseases. These MRI techniques show great promise, enabling the noninvasive assessment of renal structure, function and injury in individuals. This review will highlight the current applications of functional MRI techniques for the assessment of renal disease and discuss future directions. RECENT FINDINGS Many pathological (functional and structural) changes or factors in renal disease can be assessed by advanced MRI techniques. These include renal vascular structure and function (contrast-enhanced MRI, arterial spin labelling), tissue oxygenation (blood oxygen level dependent MRI), renal tissue injury and fibrosis (diffusion or magnetization transfer imaging, magnetic resonance elastography), renal metabolism (chemical exchange saturation transfer, spectroscopic imaging), nephron endowment (cationic-contrast imaging), sodium concentration (23Na-MRI) and molecular events (targeted-contrast imaging). SUMMARY Current advances in MRI techniques have enabled the noninvasive investigation of renal disease. Further development, evaluation and application of the MRI techniques should facilitate better understanding and assessment of renal disease, and the development of new imaging biomarkers, enabling the intensified treatment of high-risk populations and a more rapid interrogation of novel therapeutic agents and protocols.
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15
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Layton AT. Recent advances in renal hemodynamics: insights from bench experiments and computer simulations. Am J Physiol Renal Physiol 2015; 308:F951-5. [PMID: 25715984 DOI: 10.1152/ajprenal.00008.2015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 02/23/2015] [Indexed: 01/08/2023] Open
Abstract
It has been long known that the kidney plays an essential role in the control of body fluids and blood pressure and that impairment of renal function may lead to the development of diseases such as hypertension (Guyton AC, Coleman TG, Granger Annu Rev Physiol 34: 13-46, 1972). In this review, we highlight recent advances in our understanding of renal hemodynamics, obtained from experimental and theoretical studies. Some of these studies were published in response to a recent Call for Papers of this journal: Renal Hemodynamics: Integrating with the Nephron and Beyond.
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Affiliation(s)
- Anita T Layton
- Department of Mathematics, Duke University, Durham, North Carolina
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16
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Neugarten J, Golestaneh L. Blood oxygenation level-dependent MRI for assessment of renal oxygenation. Int J Nephrol Renovasc Dis 2014; 7:421-35. [PMID: 25473304 PMCID: PMC4247132 DOI: 10.2147/ijnrd.s42924] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Blood oxygen level-dependent magnetic resonance imaging (BOLD MRI) has recently emerged as an important noninvasive technique to assess intrarenal oxygenation under physiologic and pathophysiologic conditions. Although this tool represents a major addition to our armamentarium of methodologies to investigate the role of hypoxia in the pathogenesis of acute kidney injury and progressive chronic kidney disease, numerous technical limitations confound interpretation of data derived from this approach. BOLD MRI has been utilized to assess intrarenal oxygenation in numerous experimental models of kidney disease and in human subjects with diabetic and nondiabetic chronic kidney disease, acute kidney injury, renal allograft rejection, contrast-associated nephropathy, and obstructive uropathy. However, confidence in conclusions based on data derived from BOLD MRI measurements will require continuing advances and technical refinements in the use of this technique.
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Affiliation(s)
- Joel Neugarten
- Renal Division, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Ladan Golestaneh
- Renal Division, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
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Egger C, Cannet C, Gérard C, Debon C, Stohler N, Dunbar A, Tigani B, Li J, Beckmann N. Adriamycin-induced nephropathy in rats: Functional and cellular effects characterized by MRI. J Magn Reson Imaging 2014; 41:829-40. [DOI: 10.1002/jmri.24603] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 02/05/2014] [Indexed: 01/21/2023] Open
Affiliation(s)
- Christine Egger
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
- University of Basel; Biocenter; Basel Switzerland
| | - Catherine Cannet
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| | - Christelle Gérard
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| | - Corinne Debon
- Novartis Institutes for BioMedical Research; Autoimmune Diseases; Transplantation & Inflammation Department; Basel Switzerland
| | - Nadine Stohler
- Novartis Institutes for BioMedical Research; Autoimmune Diseases; Transplantation & Inflammation Department; Basel Switzerland
| | - Andrew Dunbar
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| | - Bruno Tigani
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| | - Jianping Li
- Novartis Institutes for BioMedical Research; Autoimmune Diseases; Transplantation & Inflammation Department; Basel Switzerland
| | - Nicolau Beckmann
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
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