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Zheng X, Lu X, Li Q, Gong S, Chen B, Xie Q, Yan F, Li J, Su Z, Liu Y, Guo Z, Chen J, Li Y. Discovery of 2,8-dihydroxyadenine in HUA patients with uroliths and biomarkers for its associated nephropathy. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167051. [PMID: 38336103 DOI: 10.1016/j.bbadis.2024.167051] [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: 10/16/2023] [Revised: 01/18/2024] [Accepted: 01/30/2024] [Indexed: 02/12/2024]
Abstract
Currently, it is acknowledged that gout is caused by uric acid (UA). However, some studies have revealed no correlation between gout and UA levels, and growing evidence suggests that 2,8-dihydroxyadenine (2,8-DHA), whose structural formula is similar to UA but is less soluble, may induce gout. Hence, we hypothesized that uroliths from hyperuricemia (HUA) patients, which is closely associated with gout, may contain 2,8-DHA. In this study, 2,8-DHA in uroliths and serum of HUA patients were determined using HPLC. Moreover, bioinformatics was used to investigate the pathogenic mechanisms of 2,8-DHA nephropathy. Subsequently, a mouse model of 2,8-DHA nephropathy established by the gavage administration of adenine, as well as a model of injured HK-2 cells induced by 2,8-DHA were used to explore the pathogenesis of 2,8-DHA nephropathy. Interestingly, 2,8-DHA could readily deposit in the cortex of the renal tubules, and was found in the majority of these HUA patients. Additionally, the differentially expressed genes between 2,8-DHA nephropathy mice and control mice were found to be involved in inflammatory reactions. Importantly, CCL2 and IL-1β genes had the maximum degree, closeness, and betweenness centrality scores. The expressions of CCL2 and IL-1β genes were significantly increased in the serum of 24 HUA patients with uroliths, indicating that they may be significant factors for 2,8-DHA nephropathy. Further analysis illustrated that oxidative damage and inflammation were the crucial processes of 2,8-DHA renal injury, and CCL2 and IL-1β genes were verified to be essential biomarkers for 2,8-DHA nephropathy. These findings revealed further insights into 2,8-DHA nephropathy, and provided new ideas for its diagnosis and treatment.
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Affiliation(s)
- Xiaohong Zheng
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan 523808, China
| | - Xiaowei Lu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan 523808, China
| | - Qiuxian Li
- Clinical Laboratory Department, Guangzhou Panyu Central Hospital, Guangzhou 511486, China
| | - Shiting Gong
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Baoyi Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Qingfeng Xie
- Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan 523808, China; Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510120, China
| | - Fang Yan
- The Second Clinical College Guangdong University of Chinese Medicine, Guangzhou 510120, China
| | - Jincan Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Yuhong Liu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Zhonghui Guo
- Clinical Laboratory Department, Guangzhou Panyu Central Hospital, Guangzhou 511486, China.
| | - Jiannan Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan 523808, China.
| | - Yucui Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan 523808, China.
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Alfano G, Morisi N, Giovanella S, Frisina M, Amurri A, Tei L, Ferri M, Ligabue G, Donati G. Risk of infections related to endovascular catheters and cardiac implantable devices in hemodialysis patients. J Vasc Access 2024:11297298241240502. [PMID: 38506890 DOI: 10.1177/11297298241240502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024] Open
Abstract
Patients requiring dialysis are extremely vulnerable to infectious diseases. The high burden of comorbidities and weakened immune system due to uremia and previous immunosuppressive therapy expose the patient on dialysis to more infectious events than the general population. The infectious risk is further increased by the presence of endovascular catheters and implantable cardiologic devices. The former is generally placed as urgent vascular access for dialysis and in subjects requiring hemodialysis treatments without autogenous arteriovenous fistula. The high frequency of cardiovascular events also increases the likelihood of implanting indwelling implantable cardiac devices (CIED) such as pacemakers (PMs) and defibrillators (ICDs). The simultaneous presence of CVC and CIED yields an increased risk of developing severe prosthetic device-associated bloodstream infections often progressing to septicemia. Although, antibiotic therapy is the mainstay of prosthetic device-related infections, antibiotic resistance of biofilm-residing bacteria reduces the choice of infection eradication. In these cases, the resolution of the infection process relies on the removal of the prosthetic device. Compared to CVC removal, the extraction of leads is a more complex procedure and poses an increased risk of vessel tearing. As a result, the prevention of prosthetic device-related infection is of utmost importance in hemodialysis (HD) patients and relies principally on avoiding CVC as vascular access for HD and placement of a new class of wireless implantable medical devices. When the combination of CVC and CIED is inevitable, prevention of infection, mainly due translocation of skin bacteria, should be a mandatory priority for healthcare workers.
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Affiliation(s)
- Gaetano Alfano
- Nephrology, Dialysis and Kidney Transplant Unit, Azienda Ospedaliero-Universitaria di Modena, Modena, Emilia-Romagna, Italy
| | - Niccolò Morisi
- Nephrology, Dialysis and Kidney Transplant Unit, Azienda Ospedaliero-Universitaria di Modena, Modena, Emilia-Romagna, Italy
- Surgical, Medical, Dental and Morphological Sciences Department (CHIMOMO), University of Modena and Reggio Emilia, Modena, Emilia-Romagna, Italy
| | - Silvia Giovanella
- Surgical, Medical, Dental and Morphological Sciences Department (CHIMOMO), University of Modena and Reggio Emilia, Modena, Emilia-Romagna, Italy
| | - Monica Frisina
- Nephrology, Dialysis and Kidney Transplant Unit, Azienda Ospedaliero-Universitaria di Modena, Modena, Emilia-Romagna, Italy
- Surgical, Medical, Dental and Morphological Sciences Department (CHIMOMO), University of Modena and Reggio Emilia, Modena, Emilia-Romagna, Italy
| | - Alessio Amurri
- Nephrology, Dialysis and Kidney Transplant Unit, Azienda Ospedaliero-Universitaria di Modena, Modena, Emilia-Romagna, Italy
- Surgical, Medical, Dental and Morphological Sciences Department (CHIMOMO), University of Modena and Reggio Emilia, Modena, Emilia-Romagna, Italy
| | - Lorenzo Tei
- Surgical, Medical, Dental and Morphological Sciences Department (CHIMOMO), University of Modena and Reggio Emilia, Modena, Emilia-Romagna, Italy
- Nephrology and Dialysis Unit, Azienda USL di Modena, Modena, Emilia-Romagna, Italy
| | - Maria Ferri
- Nephrology, Dialysis and Kidney Transplant Unit, Azienda Ospedaliero-Universitaria di Modena, Modena, Emilia-Romagna, Italy
- Surgical, Medical, Dental and Morphological Sciences Department (CHIMOMO), University of Modena and Reggio Emilia, Modena, Emilia-Romagna, Italy
| | - Giulia Ligabue
- Surgical, Medical, Dental and Morphological Sciences Department (CHIMOMO), University of Modena and Reggio Emilia, Modena, Emilia-Romagna, Italy
| | - Gabriele Donati
- Nephrology, Dialysis and Kidney Transplant Unit, Azienda Ospedaliero-Universitaria di Modena, Modena, Emilia-Romagna, Italy
- Surgical, Medical, Dental and Morphological Sciences Department (CHIMOMO), University of Modena and Reggio Emilia, Modena, Emilia-Romagna, Italy
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Mitochondrial Pathophysiology on Chronic Kidney Disease. Int J Mol Sci 2022; 23:ijms23031776. [PMID: 35163697 PMCID: PMC8836100 DOI: 10.3390/ijms23031776] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/01/2022] [Accepted: 02/02/2022] [Indexed: 02/04/2023] Open
Abstract
In healthy kidneys, interstitial fibroblasts are responsible for the maintenance of renal architecture. Progressive interstitial fibrosis is thought to be a common pathway for chronic kidney diseases (CKD). Diabetes is one of the boosters of CKD. There is no effective treatment to improve kidney function in CKD patients. The kidney is a highly demanding organ, rich in redox reactions occurring in mitochondria, making it particularly vulnerable to oxidative stress (OS). A dysregulation in OS leads to an impairment of the Electron transport chain (ETC). Gene deficiencies in the ETC are closely related to the development of kidney disease, providing evidence that mitochondria integrity is a key player in the early detection of CKD. The development of novel CKD therapies is needed since current methods of treatment are ineffective. Antioxidant targeted therapies and metabolic approaches revealed promising results to delay the progression of some markers associated with kidney disease. Herein, we discuss the role and possible origin of fibroblasts and the possible potentiators of CKD. We will focus on the important features of mitochondria in renal cell function and discuss their role in kidney disease progression. We also discuss the potential of antioxidants and pharmacologic agents to delay kidney disease progression.
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Buraczynska M, Ksiazek K, Wacinski P, Zaluska W. Interleukin-1β Gene ( IL1B) Polymorphism and Risk of Developing Diabetic Nephropathy. Immunol Invest 2019; 48:577-584. [PMID: 31044637 DOI: 10.1080/08820139.2019.1595642] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Objective: Cytokines play an important role in the pathogenesis of type 2 diabetes (T2DM) and its complications. The aim of the study was to evaluate an association of the -511 (C/T) polymorphism in the IL1B gene with diabetic nephropathy (DN). Methods: The study population included 860 patients with T2DM (506 with diabetic nephropathy and 354 without nephropathy) as well as 505 healthy individuals. Genomic DNA was genotyped for the IL1B -511 (C/T) polymorphism using PCR-RFLP technique. Results: The IL1B -511 C/T polymorphism was genotyped in 860 T2DM patients with or without DN and 505 healthy individuals. The average age of patients was 65.3 years in DN+ and 62.2 years in DN- subgroups. The genotype distribution did not differ significantly between patients and controls. Only a tendency to a slight increase of T allele frequency was observed in patient group. Genotype and allele frequencies of -511 C/T polymorphism were compared in patients with DN and those without it. The minor allele (T) and homozygote TT frequencies were significantly different between subgroups. The T allele was more frequent in DN+ patients, with odds ratio 1.45 (95% CI 1.2-1.8), p = 0.0003. The TT genotype frequency was also higher in DN+, with OR 1.76 (96% CI 1.1-2.7), p = 0.01. Conclusion: In a studied population the -511 C/T polymorphism in the IL1B gene is associated with diabetic nephropathy in dialyzed T2DM patients. Further studies are required to confirm the clinical significance of this finding.
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Affiliation(s)
- Monika Buraczynska
- a Department of Nephrology , Medical University of Lublin , Lublin , Poland
| | - Katarzyna Ksiazek
- b Department of Paedodontics , Medical University of Lublin , Lublin , Poland
| | - Piotr Wacinski
- c Department of Cardiology , Medical University of Lublin , Lublin , Poland
| | - Wojciech Zaluska
- a Department of Nephrology , Medical University of Lublin , Lublin , Poland
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Hameed I, Masoodi SR, Malik PA, Mir SA, Ghazanfar K, Ganai BA. Genetic variations in key inflammatory cytokines exacerbates the risk of diabetic nephropathy by influencing the gene expression. Gene 2018; 661:51-59. [PMID: 29605608 DOI: 10.1016/j.gene.2018.03.095] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 03/24/2018] [Accepted: 03/28/2018] [Indexed: 12/22/2022]
Abstract
BACKGROUND Diabetic nephropathy is the single strongest predictor of mortality in patients with diabetes. The development of overt nephropathy involves important inter-individual variations, even after adjusting for potential confounding influences of modifiable and non-modifiable risk factors. Genome-wide transcriptome studies have reported the activation of inflammatory signaling pathways and there is mounting indication of the role of genetic factors. METHODS We screened nine genetic variations in three cytokine genes (TNF-α, IL-6 and IL-β) in 1326 unrelated subjects comprising of healthy controls (n = 464), type 2 diabetics with nephropathy (DN, n = 448) and type 2 diabetes without nephropathy (T2D, n = 414) by sequence-specific amplification. Functional implication of SNPs was elucidated by correlation studies and relative gene expression using Realtime-Quantitative PCR (RT-qPCR). RESULTS Individual SNP analysis showed highest association of IL-1β rs16944-TT genotype (OR = 3.51, 95%CI = 2.36-5.21, P = 0.001) and TNF-α rs1800629-AA genotype (OR = 2.75, 95% CI = 1.64-4.59, P = 0.001) with T2D and DN respectively. The haplotype frequency showed significant risk of seven combinations among T2D and four combinations among DN subjects. The highest risk of T2D and DN was associated with GGTGAGTTT (OR = 4.25, 95%CI = 3.3-14.20, P = 0.0016) and GACGACCTT (OR = 21.3, 95%CI = 15.1-28.33, P = 0.026) haplotypes respectively. Relative expression by RT-qPCR showed increased cytokine expression in cases as compared to controls. TNF-α expression was increased by more than four-folds (n-fold = 4.43 ± 1.11) in DN. TNF-α, IL-6 and IL-1β transcript levels were significantly modulated by promoter region SNPs. CONCLUSIONS The present study implicates a strong association between cytokine TNF-α, IL-6 and IL-1β gene promoter polymorphisms and modulation of transcript levels with susceptibility to nephropathy in diabetes subjects.
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Affiliation(s)
- Iqra Hameed
- Department of Biochemistry, University of Kashmir, Hazratbal Srinagar, India; Department of Biochemistry and Molecular Biology, GK Medical Trust, Srinagar, India
| | - Shariq R Masoodi
- Department of Endocrinology and Metabolism, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India; Department of Endocrinology, Diabetes & Nutrition, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Perveez A Malik
- Department of Minimal Access Surgery, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Shahnaz A Mir
- Department of Endocrinology, Government Medical College and Associated Hospital, Srinagar, India
| | | | - Bashir A Ganai
- Center for Research and Development, University of Kashmir, Srinagar, India.
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