1
|
Li J, Hui D, Yang L, Hou J, Xie H. Effect of high density lipoprotein cholesterol (HDL-C) on renal outcome in patients with nephrotic syndrome complicated with steroid-induced diabetes mellitus(SIDM). BMC Nephrol 2023; 24:2. [PMID: 36597028 PMCID: PMC9809113 DOI: 10.1186/s12882-022-03042-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 12/15/2022] [Indexed: 01/04/2023] Open
Abstract
OBJECTIVE We aimed to investigate the renal prognosis of patients with idiopathic nephrotic syndrome (INS) complicated with steroid-induced diabetes mellitus (SIDM), the association of high-density lipoprotein cholesterol (HDL-C) before glucocorticoid treatment with renal prognosis, and the risk for persistent diabetes among patients with INS who had withdrawn from steroid therapy. MATERIALS AND METHODS We retrospectively analyzed 239 patients with INS complicated with SIDM at the National Clinical Research Center of Kidney Diseases, Jinling Hospital, from January 2008 to December 2019. The primary endpoint was the composite renal outcome defined as the development of end-stage renal disease (ESRD) or a 50% decrease in estimated glomerular filtration rate (eGFR) for more than 24 months after glucocorticoid withdrawal. The secondary endpoint was persistent diabetes, defined as fulfilling the criteria for diagnosing diabetes or using antidiabetic medications for at least 24 months after glucocorticoid withdrawal. RESULTS After glucocorticoid withdrawal for over 24 months, 35 (14.6%) patients reached the composite renal endpoint: end-stage renal disease (n = 14) or a 50% decrease in eGFR (n = 21). Before glucocorticoid therapy, a level of HDL-C greater than 1.45 mmol/L worsened renal survival in patients with INS complicated with SIDM. The log10 the level of HDL-C before glucocorticoid treatment was an independent risk factor for the renal outcome. A prediction model was generated: Hazard ratio (renal outcome) = 0.94 * hypertension before glucocorticoid therapy + 2.29 * log10 level of HDL-C before glucocorticoid treatment + 0.90 * the grade of interstitial tubule injury (AUROC, 0.75; 95% CI, 0.63 to 0.87; P < 0.01). Meanwhile, a level of fasting plasma glucose (FPG) before glucocorticoid treatment greater than 5.2 mmol/L enhanced the likelihood of persistent diabetes for at least 24 months after glucocorticoid withdrawal. CONCLUSIONS Increased level of HDL-C before glucocorticoid therapy was independently associated with a higher risk for renal outcome and thus may be useful in the renal prognosis of patients with INS complicated with SIDM.
Collapse
Affiliation(s)
- Jiarong Li
- grid.41156.370000 0001 2314 964XNational Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing Univerisity School of Medicine, Nanjing, 210016 China
| | - Di Hui
- grid.41156.370000 0001 2314 964XNational Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing Univerisity School of Medicine, Nanjing, 210016 China
| | - Liu Yang
- grid.41156.370000 0001 2314 964XNational Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing Univerisity School of Medicine, Nanjing, 210016 China
| | - Jinhua Hou
- grid.41156.370000 0001 2314 964XNational Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing Univerisity School of Medicine, Nanjing, 210016 China
| | - Honglang Xie
- grid.41156.370000 0001 2314 964XNational Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing Univerisity School of Medicine, Nanjing, 210016 China
| |
Collapse
|
2
|
HDL and Kidney Diseases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1377:163-170. [PMID: 35575929 DOI: 10.1007/978-981-19-1592-5_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Serum lipid profiles, as well as HDL can be altered in patients with kidney diseases. There are various types of kidney diseases, including nephrotic syndrome and chronic kidney disease. In patients with nephrotic syndrome, plasma levels of HDL cholesterol and ApoA-I were within or below the normal limits. The HDL cholesterol: total cholesterol ratio decreased compared to healthy individuals. In patients with chronic kidney disease (CKD), reverse cholesterol transport function of HDL is impaired, and CKD also affects the composition and function of HDL. Cardiovascular disease (CVD) is the severe complication of CKD. Furthermore, HDL might also be a potential target for the prevention of cardiovascular complications associated with CKD.
Collapse
|
3
|
Wu F, Zhang Y, Cui W, Dong Y, Geng Y, Liu C, Li Z, Xie Y, Cai X, Shang J, Xiao J, Zhao Z. Development and validation of a discrimination model between primary PLA2R-negative membranous nephropathy and minimal change disease confirmed by renal biopsy. Sci Rep 2021; 11:18064. [PMID: 34508140 PMCID: PMC8433159 DOI: 10.1038/s41598-021-97517-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 08/25/2021] [Indexed: 11/09/2022] Open
Abstract
Membranous nephropathy (MN) and minimal change disease (MCD) are two common causes leading to nephrotic syndrome (NS). They have similar clinical features but different treatment strategies and prognoses. M-type phospholipase A2 receptor (PLA2R) is considered as a specific marker of membranous nephropathy. However, its sensitivity is only about 70%. Therefore, there is a lack of effective and noninvasive tools to distinguish PLA2R-negative MN and MCD patients without renal biopsy. A total 949 patients who were pathologically diagnosed as idiopathic MN or MCD were enrolled in this study, including 805 idiopathic MN and 144 MCD. Based on the basic information and laboratory examination of 200 PLA2R-negative MN and 144 MCD, we used a univariate and multivariate logistic regression to select the relevant variables and develop a discrimination model. A novel model including age, albumin, urea, high density lipoprotein, C3 levels and red blood cell count was established for PLA2R-negative MN and MCD. The discrimination model has great differential capability (with an AUC of 0.904 in training group and an AUC of 0.886 in test group) and calibration capability. When testing in all 949 patients, our model also showed good discrimination ability for all idiopathic MN and MCD.
Collapse
Affiliation(s)
- Feng Wu
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Yiding Zhang
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Wen Cui
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Yijun Dong
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Yingyang Geng
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Changhao Liu
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Zemeng Li
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Yandong Xie
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Xiaojing Cai
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China
| | - Jin Shang
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China.
| | - Jing Xiao
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China.
| | - Zhanzheng Zhao
- Department of Nephrology, The First Affiliated Hospital, Zhengzhou University, No. 1, East Jianshe Road, Zhengzhou, 450052, Henan, People's Republic of China.
| |
Collapse
|
4
|
Yang T, Wan K, Song R, Guo X, Xu Y, Wang J, Zhang Q, Alexander KM, Liao R, Chen Y. Serum high-density lipoprotein cholesterol serves as a prognostic marker for light-chain cardiac amyloidosis. Int J Cardiol 2020; 325:96-102. [PMID: 33080283 DOI: 10.1016/j.ijcard.2020.10.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 10/09/2020] [Accepted: 10/11/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Oxidative stress and inflammation are central in the pathophysiology of light-chain amyloid cardiomyopathy (AL-CM). High-density lipoprotein cholesterol (HDLC) is an antioxidant and acts as an anti-inflammatory regulator. In this study, the prognostic value of serum HDL-C was explored in AL-CM. METHOD In this prospective single-center study, two hundred consecutive patients with biopsy-confirmed light-chain amyloidosis (AL) and cardiac involvement were enrolled. Patients were classified into low or normal serum HDL-C groups (HDL-C < 40 mg/dL and HDL-C ≥ 40 mg/dL, respectively). Univariate and multivariate Cox models were used to identify predictors of survival. Kaplan-Meier analysis was performed to compare survival between patients with low or normal serum HDL-C. RESULTS Patients with low serum HDL-C were more likely to present with higher levels of cardiac troponin-T (123.4 ng/L vs. 79.1 ng/L, p = 0.026) and higher levels of N-terminal pro-B-type natriuretic peptide (9146 pg/mL vs. 4945 pg/mL, p = 0.011). Patients were followed for a median follow-up period of 19 months, in which 118 (59%) patients died. The median overall survival times for patients with low or normal serum HDL-C were 7 and 16 months, respectively (p = 0.002). Multivariate analysis demonstrated that serum HDL-C (HR 0.984, 95% CI 0.973-0.994, p = 0.003) was independently associated with prognosis, after adjusting for nephrotic syndrome, hepatic involvement, nutritional state, renal function, SBP, DBP, serum uric acid, total cholesterol, Mayo AL 2004 stage, and treatment with chemotherapy. CONCLUSIONS HDL-C is a novel serum biomarker for disease severity and prognosis in light-chain cardiac amyloidosis.
Collapse
Affiliation(s)
- Tingjie Yang
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China
| | - Ke Wan
- Department of Geriatrics and National Clinical Research Centre for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China
| | - Rizhen Song
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China
| | - Xinli Guo
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China
| | - Yuanwei Xu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China
| | - Jie Wang
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China
| | - Qing Zhang
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China
| | - Kevin Michael Alexander
- Stanford Amyloid Center, Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, 1651 Page Mill Road, Room 2330, Palo Alto, CA 94304, USA; Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Ronglih Liao
- Stanford Amyloid Center, Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, 1651 Page Mill Road, Room 2330, Palo Alto, CA 94304, USA; Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Yucheng Chen
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China; Center of Rare Diseases, West China Hospital, Sichuan University, Chengdu, Sichuan Province 610041, PR China.
| |
Collapse
|
5
|
Molina-Jijon E, Gambut S, Macé C, Avila-Casado C, Clement LC. Secretion of the epithelial sodium channel chaperone PCSK9 from the cortical collecting duct links sodium retention with hypercholesterolemia in nephrotic syndrome. Kidney Int 2020; 98:1449-1460. [PMID: 32750454 DOI: 10.1016/j.kint.2020.06.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 06/08/2020] [Accepted: 06/29/2020] [Indexed: 01/08/2023]
Abstract
The proprotein PCSK9 functions as a chaperone for the epithelial sodium channel in the cortical collecting duct (CCD), is highly expressed in the liver, and plays a significant role in the pathogenesis of hypercholesterolemia. Lower levels of PCSK9 expression also occur in the normal kidney and intestine. Here, we found increased PCSK9 expression in the CCD of biopsies of patients with primary glomerular disease and explored a possible relationship with hypercholesterolemia of nephrotic syndrome. Significantly elevated serum PCSK9 and cholesterol levels were noted in two models of focal and segmental glomerulosclerosis, the Rrm2b-/- mouse and the Buffalo/Mna rat. Increased expression of PCSK9 in the kidney occurred when liver expression was reduced in both models. The impact of reduced or increased PCSK9 in the CCD on hypercholesterolemia in nephrotic syndrome was next studied. Mice with selective deficiency of PCSK9 expression in the collecting duct failed to develop hypercholesterolemia after injection of nephrotoxic serum. Blocking epithelial sodium channel activity with Amiloride in Rrm2b-/- mice resulted in increased expression of its chaperone PCSK9 in the CCD, followed by elevated plasma levels and worsening hypercholesterolemia. Thus, our data suggest that PCSK9 in the kidney plays a role in the initiation of hypercholesterolemia in nephrotic syndrome and make a case for depletion of PCSK9 early in patients with nephrotic syndrome to prevent the development of hypercholesterolemia.
Collapse
Affiliation(s)
- Eduardo Molina-Jijon
- Department of Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA
| | - Stéphanie Gambut
- Department of Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA
| | - Camille Macé
- Department of Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA
| | - Carmen Avila-Casado
- Department of Pathology, Toronto General Hospital, University of Toronto, Toronto, Canada
| | - Lionel C Clement
- Department of Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA.
| |
Collapse
|
6
|
The activation of BAFF/APRIL system in spleen and lymph nodes of Plasmodium falciparum infected patients. Sci Rep 2020; 10:3865. [PMID: 32123265 PMCID: PMC7052189 DOI: 10.1038/s41598-020-60763-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 02/13/2020] [Indexed: 12/16/2022] Open
Abstract
Previous studies have reported activation of the B cell-activating factor (BAFF)/a proliferation-inducing ligand (APRIL) system in T independent immunity against malaria infection. Plasmodium falciparum (P. falciparum) infected animal model is not feasible. Therefore, little is known about the occurrence of BAFF/APRIL system and changes in falciparum lymphoid tissues. This study aimed to investigate the expression of BAFF/APRIL system components in lymphoid tissues from P. falciparum infected patients. Spleen and lymph node samples from 14 patients were collected at autopsy. Normal spleens and bacterially infected tonsils served as controls. The protein and/or mRNA expression of BAFF/APRIL and their cognate receptors, BAFF-R, TACI and BCMA, were determined by immunohistochemistry and RT-qPCR, respectively. The spleens of the patients exhibited significantly higher BAFF-R protein expression than normal spleens. Although without appropriate control, BCMA protein was markedly observed only in the lymph nodes. BAFF and BCMA mRNA levels were also significantly elevated in the spleen tissues of the patients compared with normal spleens. The overall BAFF-R protein levels in the lymphoid tissues of the patients correlated positively with parasitaemia. These findings are the first to confirm that BAFF/APRIL system activation in lymphoid tissues and is positively correlated with the parasitaemia levels in falciparum malaria.
Collapse
|
7
|
IL-13-driven alterations in hepatic cholesterol handling contributes to hypercholesterolemia in a rat model of minimal change disease. Clin Sci (Lond) 2020; 134:225-237. [DOI: 10.1042/cs20190961] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/03/2020] [Accepted: 01/14/2020] [Indexed: 02/08/2023]
Abstract
AbstractCirculating factors have been implicated in the pathogenesis of minimal change disease (MCD), and may have direct effects on cholesterol metabolism. This study investigated the pathogenesis of hypercholesterolemia in an IL-13 overexpression rat model of MCD prior to the onset of proteinuria, so as to establish the direct contribution of IL-13, especially with regard to hepatic cholesterol handling. In this model of MCD, the temporal relationship between hypercholesterolemia and proteinuria was first identified. Plasma proprotein convertase subtilisin/kexin type 9 (Pcsk9) and liver ATP-binding cassette sub-family G member 5 (Abcg5) were measured using ELISA. Liver Ldlr and liver X receptor alpha (Lxra) were quantified with Western blot. Abcg5-mediated cholesterol efflux in IL-13-stimulated rat primary hepatocytes was measured using taurocholate as cholesterol acceptor. The role of Lxra was validated using a luciferase assay in Lxre-luciferase-transfected IL-13-stimulated hepatocytes. IL-13-transfected rats developed hypercholesterolemia prior to proteinuria, with 35% of rats hypercholesterolemic but only 11% proteinuric by Day 20 (P = 0.04). These pre-proteinuric hypercholesterolemic rats showed elevations in total and LDL-cholesterol, but not hypertriglyceridemia or hepatic steatosis. The hypercholesterolemia was associated with increased hepatic Pcsk9 synthesis and enhanced circulating Pcsk9 levels, which correlated strongly with plasma total cholesterol (r = 0.73, P<0.001). The hypercholesterolemia was also contributed by decreased Abcg5 expression and activity, due to reduced Lxra expression. Lxra expression correlated with plasma total cholesterol levels (r = −0.52, P = 0.01), and overexpression of pLxra in rat hepatocytes abrogated the IL-13-mediated down-regulation of Lxre-driven gene expression. In conclusion, we have shown that IL-13 induced changes in hepatic cholesterol handling in a cytokine-induced rat model of MCD, resulting in hypercholesterolemia which can precede the onset of proteinuria.
Collapse
|
8
|
Corsetti JP, Bakker SJL, Gansevoort RT, Gruppen EG, Connelly MA, Sparks CE, Dullaart RPF. Compositional Features of HDL Particles Interact with Albuminuria to Modulate Cardiovascular Disease Risk. Int J Mol Sci 2019; 20:E977. [PMID: 30813431 PMCID: PMC6412699 DOI: 10.3390/ijms20040977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/17/2019] [Accepted: 02/19/2019] [Indexed: 11/28/2022] Open
Abstract
Lipoproteins containing apolipoprotein B modify associations of elevated urinary albumin excretion (UAE) with cardiovascular disease (CVD). Additionally, it is known that elevated UAE alters high-density lipoprotein functionality. Accordingly, we examined whether HDL features might also modify UAE-associated CVD. Multivariable Cox proportional-hazards modeling was performed on participants of the PREVEND (Prevention of Renal and Vascular Endstage Disease) study at the baseline screening with standard lipid/lipoprotein analyses and, three-to-four years later (second screen), with nuclear magnetic resonance lipoprotein analyses focusing on HDL parameters including HDL particle (HDL-P) and apolipoprotein A-I concentrations. These were used with UAE and derived measures of HDL apoA-I content (apoA-I/HDL-C and apoA-I/HDL-P) in risk models adjusted for gender, age, apoB, diabetes, past CVD history, CRP and GFR. Interaction analysis was also performed. Baseline screening revealed significant associations inverse for HDL-C and apoA-I and direct for apoA-I/HDL-C. The second screening demonstrated associations inverse for HDL-P, large HDL-P, medium HDL-P, HDL size, and apoA-I/HDL-P. Significant interactions with UAE included apoA-I/HDL-C at the baseline screening, and apoA-I/HDL-P and medium HDL-P but not apoA-I/HDL-C at the second screening. We conclude that features of HDL particles including apoA-I/HDL-P, indicative of HDL apoA-I content, and medium HDL-P modify associations of elevated UAE with CVD risk.
Collapse
Affiliation(s)
- James P Corsetti
- Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.
| | - Stephan J L Bakker
- Department of Nephrology, University of Groningen and University Medical Center Groningen, 9700 RB Groningen, The Netherlands.
| | - Ronald T Gansevoort
- Department of Nephrology, University of Groningen and University Medical Center Groningen, 9700 RB Groningen, The Netherlands.
| | - Eke G Gruppen
- Department of Nephrology, University of Groningen and University Medical Center Groningen, 9700 RB Groningen, The Netherlands.
- Department of Endocrinology, University of Groningen and University Medical Center Groningen, 9700 RB Groningen, The Netherlands.
| | - Margery A Connelly
- Laboratory Corporation of America Holdings (LabCorp), Morrisville, NC 27560, USA.
| | - Charles E Sparks
- Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.
| | - Robin P F Dullaart
- Department of Endocrinology, University of Groningen and University Medical Center Groningen, 9700 RB Groningen, The Netherlands.
| |
Collapse
|
9
|
Haas ME, Levenson AE, Sun X, Liao WH, Rutkowski JM, de Ferranti SD, Schumacher VA, Scherer PE, Salant DJ, Biddinger SB. The Role of Proprotein Convertase Subtilisin/Kexin Type 9 in Nephrotic Syndrome-Associated Hypercholesterolemia. Circulation 2016; 134:61-72. [PMID: 27358438 DOI: 10.1161/circulationaha.115.020912] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 04/28/2016] [Indexed: 01/27/2023]
Abstract
BACKGROUND In nephrotic syndrome, damage to the podocytes of the kidney produces severe hypercholesterolemia for which novel treatments are urgently needed. PCSK9 (proprotein convertase subtilisin/kexin type 9) has emerged as an important regulator of plasma cholesterol levels and therapeutic target. Here, we tested the role of PCSK9 in mediating the hypercholesterolemia of nephrotic syndrome. METHODS PCSK9 and plasma lipids were studied in nephrotic syndrome patients before and after remission of disease, mice with genetic ablation of the podocyte (Podocyte Apoptosis Through Targeted Activation of Caspase-8, Pod-ATTAC mice) and mice treated with nephrotoxic serum (NTS), which triggers immune-mediated podocyte damage. In addition, mice with hepatic deletion of Pcsk9 were treated with NTS to determine the contribution of PCSK9 to the dyslipidemia of nephrotic syndrome. RESULTS Patients with nephrotic syndrome showed a decrease in plasma cholesterol and plasma PCSK9 on remission of their disease (P<0.05, n=47-50). Conversely, Pod-ATTAC mice and NTS-treated mice showed hypercholesterolemia and a 7- to 24-fold induction in plasma PCSK9. The induction of plasma PCSK9 appeared to be attributable to increased secretion of PCSK9 from the hepatocyte coupled with decreased clearance. Interestingly, knockout of Pcsk9ameliorated the effects of NTS on plasma lipids. Thus, in the presence of NTS, mice lacking hepatic Pcsk9 showed a 40% to 50% decrease in plasma cholesterol and triglycerides. Moreover, the ability of NTS treatment to increase the percentage of low-density lipoprotein-associated cholesterol (from 9% in vehicle-treated Flox mice to 47% after NTS treatment), was lost in mice with hepatic deletion of Pcsk9 (5% in both the presence and absence of NTS). CONCLUSIONS Podocyte damage triggers marked inductions in plasma PCSK9, and knockout of Pcsk9 ameliorates dyslipidemia in a mouse model of nephrotic syndrome. These data suggest that PCSK9 inhibitors may be beneficial in patients with nephrotic syndrome-associated hypercholesterolemia.
Collapse
Affiliation(s)
- Mary E Haas
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - Amy E Levenson
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - Xiaowei Sun
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - Wan-Hui Liao
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - Joseph M Rutkowski
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - Sarah D de Ferranti
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - Valerie A Schumacher
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - Philipp E Scherer
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - David J Salant
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.)
| | - Sudha B Biddinger
- From Division of Endocrinology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (M.E.H., A.E.L., X.S., W.-H.L., S.B.B.); Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas (J.M.R., P.E.S.); Division of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, MA (S.D.d.F.); Division of Nephrology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA (V.A.S.); and Department of Medicine, Section of Nephrology, Boston University Medical Center, MA (D.J.S.).
| |
Collapse
|
10
|
Vaziri ND. Disorders of lipid metabolism in nephrotic syndrome: mechanisms and consequences. Kidney Int 2016; 90:41-52. [PMID: 27165836 DOI: 10.1016/j.kint.2016.02.026] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 02/02/2016] [Accepted: 02/11/2016] [Indexed: 12/17/2022]
Abstract
Nephrotic syndrome results in hyperlipidemia and profound alterations in lipid and lipoprotein metabolism. Serum cholesterol, triglycerides, apolipoprotein B (apoB)-containing lipoproteins (very low-density lipoprotein [VLDL], immediate-density lipoprotein [IDL], and low-density lipoprotein [LDL]), lipoprotein(a) (Lp[a]), and the total cholesterol/high-density lipoprotein (HDL) cholesterol ratio are increased in nephrotic syndrome. This is accompanied by significant changes in the composition of various lipoproteins including their cholesterol-to-triglyceride, free cholesterol-to-cholesterol ester, and phospholipid-to-protein ratios. These abnormalities are mediated by changes in the expression and activities of the key proteins involved in the biosynthesis, transport, remodeling, and catabolism of lipids and lipoproteins including apoproteins A, B, C, and E; 3-hydroxy-3-methylglutaryl-coenzyme A reductase; fatty acid synthase; LDL receptor; lecithin cholesteryl ester acyltransferase; acyl coenzyme A cholesterol acyltransferase; HDL docking receptor (scavenger receptor class B, type 1 [SR-B1]); HDL endocytic receptor; lipoprotein lipase; and hepatic lipase, among others. The disorders of lipid and lipoprotein metabolism in nephrotic syndrome contribute to the development and progression of cardiovascular and kidney disease. In addition, by limiting delivery of lipid fuel to the muscles for generation of energy and to the adipose tissues for storage of energy, changes in lipid metabolism contribute to the reduction of body mass and impaired exercise capacity. This article provides an overview of the mechanisms, consequences, and treatment of lipid disorders in nephrotic syndrome.
Collapse
Affiliation(s)
- Nosratola D Vaziri
- Division of Nephrology and Hypertension, Departments of Medicine, Physiology, and Biophysics, University of California, Irvine, Irvine, California.
| |
Collapse
|
11
|
Abstract
Normal HDL activity confers cardiovascular and overall protection by mediating reverse cholesterol transport and through its potent anti-inflammatory, antioxidant, and antithrombotic functions. Serum lipid profile, as well as various aspects of HDL metabolism, structure, and function can be profoundly altered in patients with nephrotic range proteinuria or chronic kidney disease (CKD). These abnormalities can, in turn, contribute to the progression of cardiovascular complications and various other comorbidities, such as foam cell formation, atherosclerosis, and/or glomerulosclerosis, in affected patients. The presence and severity of proteinuria and renal insufficiency, as well as dietary and drug regimens, pre-existing genetic disorders of lipid metabolism, and renal replacement therapies (including haemodialysis, peritoneal dialysis, and renal transplantation) determine the natural history of lipid disorders in patients with kidney disease. Despite the adverse effects associated with dysregulated reverse cholesterol transport and advances in our understanding of the underlying mechanisms, safe and effective therapeutic interventions are currently lacking. This Review provides an overview of HDL metabolism under normal conditions, and discusses the features, mechanisms, and consequences of HDL abnormalities in patients with nephrotic syndrome or advanced CKD.
Collapse
|
12
|
Kardassis D, Gafencu A, Zannis VI, Davalos A. Regulation of HDL genes: transcriptional, posttranscriptional, and posttranslational. Handb Exp Pharmacol 2015; 224:113-179. [PMID: 25522987 DOI: 10.1007/978-3-319-09665-0_3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
HDL regulation is exerted at multiple levels including regulation at the level of transcription initiation by transcription factors and signal transduction cascades; regulation at the posttranscriptional level by microRNAs and other noncoding RNAs which bind to the coding or noncoding regions of HDL genes regulating mRNA stability and translation; as well as regulation at the posttranslational level by protein modifications, intracellular trafficking, and degradation. The above mechanisms have drastic effects on several HDL-mediated processes including HDL biogenesis, remodeling, cholesterol efflux and uptake, as well as atheroprotective functions on the cells of the arterial wall. The emphasis is on mechanisms that operate in physiologically relevant tissues such as the liver (which accounts for 80% of the total HDL-C levels in the plasma), the macrophages, the adrenals, and the endothelium. Transcription factors that have a significant impact on HDL regulation such as hormone nuclear receptors and hepatocyte nuclear factors are extensively discussed both in terms of gene promoter recognition and regulation but also in terms of their impact on plasma HDL levels as was revealed by knockout studies. Understanding the different modes of regulation of this complex lipoprotein may provide useful insights for the development of novel HDL-raising therapies that could be used to fight against atherosclerosis which is the underlying cause of coronary heart disease.
Collapse
Affiliation(s)
- Dimitris Kardassis
- Department of Biochemistry, University of Crete Medical School and Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology of Hellas, Heraklion, Crete, 71110, Greece,
| | | | | | | |
Collapse
|
13
|
Vaziri ND, Norris KC. Reasons for the lack of salutary effects of cholesterol-lowering interventions in end-stage renal disease populations. Blood Purif 2013; 35:31-6. [PMID: 23343544 DOI: 10.1159/000345176] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Cardiovascular disease (CVD) is the main cause of premature death in patients with chronic kidney disease (CKD). The underlying mechanisms of CVD in patients with mild to moderate CKD are different from those with end-stage renal disease (ESRD). While serum cholesterol is frequently elevated and contributes to atherosclerosis in many CKD patients, particularly those with nephrotic proteinuria, it is usually normal, even subnormal, in most ESRD patients receiving hemodialysis. CVD in the ESRD population is primarily driven by oxidative stress, inflammation, accumulation of the oxidation-prone intermediate-density lipoproteins, chylomicron remnants and small dense low-density lipoprotein particles as well as high-density lipoprotein deficiency and dysfunction, hypertension, vascular calcification, and arrhythmias. Only a minority of hemodialysis patients have hypercholesterolemia which is most likely due to genetic or unrelated factors. In addition, due to peritoneal losses of proteins which simulate nephrotic syndrome, peritoneal dialysis patients often exhibit hypercholesterolemia. Clearly when present, hypercholesterolemia contributes to CVD in the CKD and ESRD population and justifies cholesterol-lowering therapy. However, the majority of ESRD patients and a subpopulation of CKD patients with minimal proteinuria have normal or subnormal serum cholesterol levels and do not benefit from and can be potentially harmed by statin therapy. In fact the lack of efficacy of statins in hemodialysis patients has been demonstrated in several randomized clinical trials. This review is intended to provide an overview of the mechanisms responsible for the failure of statins to reduce cardiovascular morbidity and mortality in most ESRD patients and to advocate the adoption of individualized care principles in the management of dyslipidemia in this population.
Collapse
Affiliation(s)
- Nosratola D Vaziri
- Departments of Medicine, Physiology and Biophysics, Division of Nephrology and Hypertension, University of California, Irvine, CA 92868, USA.
| | | |
Collapse
|
14
|
Epstein M, Vaziri ND. Statins in the management of dyslipidemia associated with chronic kidney disease. Nat Rev Nephrol 2012; 8:214-23. [PMID: 22349484 DOI: 10.1038/nrneph.2012.33] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The cause of death in the majority of patients with chronic kidney disease (CKD) and end-stage renal disease (ESRD) is accelerated cardiovascular disease and not renal failure per se, suggesting a role for statin therapy in this setting. During the past 6 years three large, randomized, placebo-controlled studies of three different statins have been conducted in the dialysis population-but two of these studies did not demonstrate any benefits of statin therapy, and the third study showed only marginally positive results. To understand why statins have failed to reduce cardiovascular events in patients with ESRD, the basic mechanisms underlying the pathogenesis of dyslipidemia in CKD must be critically examined. The observed negative results in the clinical trials of statin therapy might also reflect the biomarkers and targets that were chosen to be evaluated. The characteristics of dyslipidemia in patients with CKD not yet requiring dialysis treatment differ markedly from those of individuals with established ESRD and form the basis for therapeutic recommendations. The potential adverse effects associated with statin therapy are important to consider in the management of dyslipidemia in patients with CKD.
Collapse
Affiliation(s)
- Murray Epstein
- Division of Nephrology and Hypertension, University of Miami Miller School of Medicine, 1201 North West 16th Street, Miami, FL 33125, USA.
| | | |
Collapse
|