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William S, Khan A, Riaz M, Ahmad R, Akhtar MF, Anwar F. Antiurolithic Activity of Zaleya Pentandra (L.) C Jeffrey in Ethylene glycol-induced Calcium Oxalate Crystal Rat Model; A Scientific Validation of Traditional Use for Kidney Stone Prevention. JOURNAL OF ETHNOPHARMACOLOGY 2024:118905. [PMID: 39374879 DOI: 10.1016/j.jep.2024.118905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Revised: 10/01/2024] [Accepted: 10/04/2024] [Indexed: 10/09/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Traditional herbal remedies have been used for treating nephrolithiasis, but the relevant scientific evidence is limited. Zaleya pentandra (L.) C. Jeffrey is traditionally used for the prevention of kidney stones in various cultures. However, its efficacy has not been scientifically studied. AIM OF THE STUDY This study aimed to investigate the antiurolithic activity of Zaleya pentandra, and validate its traditional used for preventing kidney stones. MATERIALS AND METHODS The crude ethanolic extract of Z. pentandra (Zp.Crd) was evaluated through in vitro and in vivo studies. In vitro experiments assessed its impact on crystal count and morphology in metastable calcium oxalate solutions. In vivo studies involved diuretic and ethylene glycol-induced calcium oxalate crystal formation in male Wistar rats. RESULTS Zp.Crd transforms calcium oxalate crystals from harmful calcium oxalate monohydrate (COM) to calcium oxalate dihydrate (COD). In vivo, Zp.Crd exhibited dose-dependent (30-300 mg/kg) diuretic activity in rats by significantly increasing urinary sodium (Na+) and potassium (K+) excretion, similar to the standard diuretic hydrochlorothiazide (HCT). In the urolithiasis model, Zp.Crd exhibited dose-dependent antiurolithic effects by reducing kidney crystals and significantly altering lithogenic factors induced by ethylene glycol, including crystalluria, oxaluria, calcium, creatinine, and urea, in the urine and serum of treated rats. Zp.Crd also exhibited antioxidant effects, effectively combating oxidative lithogenic stress in rats. CONCLUSION Zp.Crd has been shown to demonstrate antiurolithic activity against CaOx stones through CaOx crystal inhibition, diuretic activity, antioxidant properties, hypocalciuric effects, and hypercitrauric actions. The findings underscore Zp.Crd's potential as a viable alternative or supplemental therapy to current urolithiasis treatments, paving the door for further clinical trials and its inclusion into modern medical practices.
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Affiliation(s)
- Sumaira William
- Institute of Pharmaceutical Sciences, Riphah International University, Lahore, Pakistan
| | - Aslam Khan
- Institute of Pharmaceutical Sciences, Riphah International University, Lahore, Pakistan; Institute of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan.
| | - Muhammad Riaz
- Department of Pharmacy, Shaheed Benazir Bhutto University Sheringal Dir Upper, Pakistan
| | - Rizwan Ahmad
- Department of Natural Products, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | | | - Fareeha Anwar
- Institute of Pharmaceutical Sciences, Riphah International University, Lahore, Pakistan
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Liu J, Liu X, Guo L, Liu X, Gao Q, Wang E, Dong Z. PPARγ agonist alleviates calcium oxalate nephrolithiasis by regulating mitochondrial dynamics in renal tubular epithelial cell. PLoS One 2024; 19:e0310947. [PMID: 39325731 PMCID: PMC11426502 DOI: 10.1371/journal.pone.0310947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Accepted: 09/09/2024] [Indexed: 09/28/2024] Open
Abstract
BACKGROUND Kidney stone formation is a common disease that causes a significant threat to human health. The crystallization mechanism of calcium oxalate, the most common type of kidney stone, has been extensively researched, yet the damaging effects and mechanisms of calcium oxalate crystals on renal tubular epithelial cells remain incompletely elucidated. Regulated mitochondrial dynamics is essential for eukaryotic cells, but its role in the occurrence and progression of calcium oxalate (CaOx) nephrolithiasis is not yet understood. METHODS An animal model of calcium oxalate-related nephrolithiasis was established in adult male Sprague‒Dawley (SD) rats by continuously administering drinking water containing 1% ethylene glycol for 28 days. The impact of calcium oxalate crystals on mitochondrial dynamics and apoptosis in renal tubular epithelial cells was investigated using HK2 cells in vitro. Blood samples and bilateral kidney tissues were collected for histopathological evaluation and processed for tissue injury, inflammation, fibrosis, oxidative stress detection, and mitochondrial dynamics parameter analysis. RESULTS Calcium oxalate crystals caused higher levels of mitochondrial fission and apoptosis in renal tubular epithelial cells both in vivo and in vitro. Administration of a PPARγ agonist significantly alleviated mitochondrial fission and apoptosis in renal tubular epithelial cells, and improved renal function, accompanied by reduced levels of oxidative stress, increased antioxidant enzyme expression, alleviation of inflammation, and reduced fibrosis in vivo. CONCLUSION Our results indicated that increased mitochondrial fission in renal tubular epithelial cells is a critical component of kidney injury caused by calcium oxalate stones, leading to the accumulation of reactive oxygen species within the tissue and the subsequent initiation of apoptosis. Regulating mitochondrial dynamics represents a promising approach for calcium oxalate nephrolithiasis.
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Affiliation(s)
- Junfa Liu
- Department of Urology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xingyang Liu
- Department of Anesthesiology, Xiangya Hospital Central South University, Changsha, China
| | - Lizhe Guo
- Department of Anesthesiology, Xiangya Hospital Central South University, Changsha, China
| | - Xiongfei Liu
- Department of Urology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Qian Gao
- Center for Translational Medicine and Jiangsu Key Laboratory of Molecular Medicine, Medical School of Nanjing University, Nanjing, China
| | - E Wang
- Department of Anesthesiology, Xiangya Hospital Central South University, Changsha, China
| | - Zhitao Dong
- Department of Urology, The Second Xiangya Hospital, Central South University, Changsha, China
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Hong SY, Qin BL. The Protective Role of Dietary Polyphenols in Urolithiasis: Insights into Antioxidant Effects and Mechanisms of Action. Nutrients 2023; 15:3753. [PMID: 37686790 PMCID: PMC10490426 DOI: 10.3390/nu15173753] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/15/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
Urolithiasis is a common urological disease with increasing prevalence and high recurrence rates around the world. Numerous studies have indicated reactive oxygen species (ROS) and oxidative stress (OS) were crucial pathogenic factors in stone formation. Dietary polyphenols are a large group of natural antioxidant compounds widely distributed in plant-based foods and beverages. Their diverse health benefits have attracted growing scientific attention in recent decades. Many literatures have reported the effectiveness of dietary polyphenols against stone formation. The antiurolithiatic mechanisms of polyphenols have been explained by their antioxidant potential to scavenge free radicals and ROS, modulate the expression and the activity of endogenous antioxidant and prooxidant enzymes, regulate signaling pathways associated with OS, and maintain cell morphology and function. In this review, we first describe OS and its pathogenic effects in urolithiasis and summarize the classification and sources of dietary polyphenols. Then, we focus on the current evidence defining their antioxidant potential against stone formation and put forward challenges and future perspectives of dietary polyphenols. To conclude, dietary polyphenols offer potential applications in the treatment and prevention of urolithiasis.
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Affiliation(s)
| | - Bao-Long Qin
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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Khan A, Gilani AH. An insight investigation to the antiurolithic activity of Trachyspermum ammi using the in vitro and in vivo experiments. Urolithiasis 2023; 51:43. [PMID: 36867274 DOI: 10.1007/s00240-023-01415-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 02/18/2023] [Indexed: 03/04/2023]
Abstract
The crude extract of Trachyspermum ammi seeds (Ta.Cr) was studied for its antiurolithic activity using the in vivo and in vitro experiments. In the in vivo experiments, Ta.Cr treatment showed a diuretic activity at the dose of 30 and 100 mg/kg and exhibited curative effect in male hyperoxaluric Wistar rats, which received 0.75% ethylene glycol (EG) in drinking water given for 3 weeks, with 1% ammonium chloride (AC) for initial three days. In the in vitro experiments, Ta.Cr delayed the slopes of nucleation and inhibited the calcium oxalate (CaOx) crystal aggregation in a concentration-dependent manner like that of potassium citrate. Ta.Cr also inhibited DPPH free radicals like standard antioxidant drug butylated hydroxytoluene (BHT), and significantly reduced cell toxicity and LDH release in Madin-Darby canine kidney (MDCK) cells, exposed to oxalate (0.5 mM) and COM (66 µg/cm2) crystals. In isolated rabbit urinary bladder strips, Ta.Cr relaxed high K+ (80 mM) and CCh (1 µM)-induced contractions, showing antispasmodic activity. The findings of this study suggest that the antiurolithic activity of crude extract of Trachyspermum ammi seeds may be mediated by a number of mechanisms, including a diuretic, an inhibitor of CaOx crystal aggregation, an antioxidant, renal epithelial cell protection, and an antispasmodic, thus, showing the therapeutic potential in urolithiasis, for which there is no viable non-invasive option in modern medicine.
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Affiliation(s)
- Aslam Khan
- Riphah Institute of Pharmaceutical Sciences, Riphah International University, 13 KM Raiwind Road, Lahore, Pakistan. .,Department of Biological and Biomedical Sciences, Aga Khan University Medical College, Karachi, 74800, Pakistan.
| | - Anwar H Gilani
- Department of Biological and Biomedical Sciences, Aga Khan University Medical College, Karachi, 74800, Pakistan. .,Pakistan Academy of Sciences, Constitution Avenue, G-5, Islamabad, Pakistan.
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Huan G, Tao Y, Yu W, Jinghui Z, Yueming Z, Yanqing S. Egg white protein hydrolysate ameliorated sepsis-induced inflammatory injuries in kidney and liver based on metabolomics analysis. Biomed Pharmacother 2022; 153:113442. [DOI: 10.1016/j.biopha.2022.113442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/14/2022] [Accepted: 07/18/2022] [Indexed: 11/02/2022] Open
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Rasool M, Mousa T, Alhamadani H, Ismael A. Therapeutic potential of medicinal plants for the management of renal stones: A review. BAGHDAD JOURNAL OF BIOCHEMISTRY AND APPLIED BIOLOGICAL SCIENCES 2022. [DOI: 10.47419/bjbabs.v3i02.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Kidney stone disease is the third most common urological ailment worldwide, people. The mechanism of stone formation includes: urine supersaturation, aggregation, retention, nucleation, and growth of crystals in the cells of the renal tubular epithelium. Kidney stones may cause extreme pain and blockage of urine flow. They are usually treated with conventional drugs and shock wave (ESWL) as well as a variety of medications that may cause several adverse effects. The remaining stone fragments and the risk of infection following ESWL are major challenges in the treatment of kidney stones. Recently, despite the emergence of modern drugs, medicinal plants have been recognized and utilized in many nations clinically due to their safety profile, efficiency, cultural acceptance, and fewer side effects than approved drugs. Medicinal plants are used in different cultures as a reliable source of natural remedies. The aim of this review is to provide comprehensive information about traditionally used plants as well as their scientifically proven pharmacological activities, their primary chemical ingredients, and potential mechanisms of action, such as analgesic, astringent, demulcent, diuretic activity, antioxidant activity, inhibition of the inflammatory process, nucleation inhibition, crystallization inhibition, inhibition of crystal aggregation, reducing , reducing stone size, and reducing urine supersaturation.
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Dong F, Jiang S, Tang C, Wang X, Ren X, Wei Q, Tian J, Hu W, Guo J, Fu X, Liu L, Patzak A, Persson PB, Gao F, Lai EY, Zhao L. Trimethylamine N-oxide promotes hyperoxaluria-induced calcium oxalate deposition and kidney injury by activating autophagy. Free Radic Biol Med 2022; 179:288-300. [PMID: 34767921 DOI: 10.1016/j.freeradbiomed.2021.11.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/06/2021] [Accepted: 11/08/2021] [Indexed: 12/12/2022]
Abstract
Calcium oxalate (CaOx) is the most common component of kidney stones. Oxidative stress, inflammation and autophagy-induced cell death are the major causes of CaOx crystal deposition and CaOx crystal deposition can further lead to kidney injury. Trimethylamine N-oxide (TMAO), a gut microbiota-derived metabolite, plays an important role in the pathogenesis of many diseases, such as atherosclerosis, diabetes and chronic kidney disease, but the effect of TMAO on hyperoxaluria-induced CaOx crystal deposition and kidney injury remains unknown. We hypothesize that TMAO aggravates CaOx crystal deposition via promoting CaOx-mediated cell death. C57Bl/6 mice were given high-oxalate diet as a model of hyperoxaluria. TMAO was provided via drinking water. Serum TMAO levels increased 15 days after CaOx treatment (6.30 ± 0.17 μmol/L vs. 34.65 ± 8.95 μmol/L). High-oxalate diet induced inflammation, CaOx deposition and kidney injury, which TMAO aggravated. In accordance, TMAO intensified high-oxalate diet induced oxidative stress, autophagy and apoptosis. Moreover, TMAO enhanced CaOx crystal adhesion to HK-2 cells and reduced cell viability (from 88.9 ± 1.6% to 75.0 ± 2.7%). Protein kinase R-like endoplasmic reticulum kinase (PERK) may mediate these TMAO effects, as TMAO promoted PERK phosphorylation. Consistently, PERK knockdown alleviated TMAO-evoked CaOx-autophagy, apoptosis and oxidative stress in HK-2 cells. In conclusion, TMAO can aggravate hyperoxaluria-induced kidney injury by triggering the PERK/ROS pathway, which enhances autophagy, apoptosis and inflammation, and facilitates CaOx crystal deposition in renal tubular cells.
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Affiliation(s)
- Fang Dong
- Department of Physiology, School of Basic Medical Sciences, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Shan Jiang
- Department of Nephrology, Center of Kidney and Urology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Chun Tang
- Department of Nephrology, Center of Kidney and Urology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Xiaohua Wang
- Department of Nephrology, Center of Kidney and Urology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Xiaoqiu Ren
- Department of Radiation Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Qichun Wei
- Department of Radiation Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Jiong Tian
- Department of Physiology, School of Basic Medical Sciences, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Weipeng Hu
- Department of Physiology, School of Basic Medical Sciences, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Jie Guo
- Department of Physiology, School of Basic Medical Sciences, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Xiaodong Fu
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China
| | - Linlin Liu
- Durbrain Medical Laboratory, Hangzhou, 310000, China
| | - Andreas Patzak
- Institute of Vegetative Physiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, 10117, Germany
| | - Pontus B Persson
- Institute of Vegetative Physiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, 10117, Germany
| | - Fei Gao
- Durbrain Medical Laboratory, Hangzhou, 310000, China.
| | - En Yin Lai
- Department of Physiology, School of Basic Medical Sciences, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China; Department of Nephrology, Center of Kidney and Urology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China; Institute of Vegetative Physiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, 10117, Germany.
| | - Liang Zhao
- Department of Physiology, School of Basic Medical Sciences, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China; Department of Nephrology, Center of Kidney and Urology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China; Institute of Vegetative Physiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, 10117, Germany.
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Saenz-Medina J, Muñoz M, Rodriguez C, Sanchez A, Contreras C, Carballido-Rodríguez J, Prieto D. Endothelial Dysfunction: An Intermediate Clinical Feature between Urolithiasis and Cardiovascular Diseases. Int J Mol Sci 2022; 23:ijms23020912. [PMID: 35055099 PMCID: PMC8778796 DOI: 10.3390/ijms23020912] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/10/2022] [Accepted: 01/11/2022] [Indexed: 02/08/2023] Open
Abstract
UNLABELLED An epidemiological relationship between urolithiasis and cardiovascular diseases has extensively been reported. Endothelial dysfunction is an early pathogenic event in cardiovascular diseases and has been associated with oxidative stress and low chronic inflammation in hypertension, coronary heart disease, stroke or the vascular complications of diabetes and obesity. The aim of this study is to summarize the current knowledge about the pathogenic mechanisms of urolithiasis in relation to the development of endothelial dysfunction and cardiovascular morbidities. METHODS A non-systematic review has been performed mixing the terms "urolithiasis", "kidney stone" or "nephrolithiasis" with "cardiovascular disease", "myocardial infarction", "stroke", or "endothelial dysfunction". RESULTS Patients with nephrolithiasis develop a higher incidence of cardiovascular disease with a relative risk estimated between 1.20 and 1.24 and also develop a higher vascular disease risk scores. Analyses of subgroups have rendered inconclusive results regarding gender or age. Endothelial dysfunction has also been strongly associated with urolithiasis in clinical studies, although no systemic serum markers of endothelial dysfunction, inflammation or oxidative stress could be clearly related. Analysis of urine composition of lithiasic patients also detected a higher expression of proteins related to cardiovascular disease. Experimental models of hyperoxaluria have also found elevation of serum endothelial dysfunction markers. CONCLUSIONS Endothelial dysfunction has been strongly associated with urolithiasis and based on the experimental evidence, should be considered as an intermediate and changeable feature between urolithiasis and cardiovascular diseases. Oxidative stress, a key pathogenic factor in the development of endothelial dysfunction has been also pointed out as an important factor of lithogenesis. Special attention must be paid to cardiovascular morbidities associated with urolithiasis in order to take advantage of pleiotropic effects of statins, angiotensin receptor blockers and allopurinol.
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Affiliation(s)
- Javier Saenz-Medina
- Department of Urology, Puerta de Hierro-Majadahonda University Hospital, 28222 Majadahonda, Spain
- Department of Medical Specialities and Public Health, Faculty of Health Sciences, King Juan Carlos University, 28933 Móstoles, Spain
- Correspondence:
| | - Mercedes Muñoz
- Department of Physiology, Pharmacy Faculty, Complutense University, 28040 Madrid, Spain; (M.M.); (C.R.); (A.S.); (C.C.); (D.P.)
| | - Claudia Rodriguez
- Department of Physiology, Pharmacy Faculty, Complutense University, 28040 Madrid, Spain; (M.M.); (C.R.); (A.S.); (C.C.); (D.P.)
| | - Ana Sanchez
- Department of Physiology, Pharmacy Faculty, Complutense University, 28040 Madrid, Spain; (M.M.); (C.R.); (A.S.); (C.C.); (D.P.)
| | - Cristina Contreras
- Department of Physiology, Pharmacy Faculty, Complutense University, 28040 Madrid, Spain; (M.M.); (C.R.); (A.S.); (C.C.); (D.P.)
| | - Joaquín Carballido-Rodríguez
- Department of Urology, Puerta de Hierro-Majadahonda University Hospital, Autonoma University, 08193 Bellaterra, Spain;
| | - Dolores Prieto
- Department of Physiology, Pharmacy Faculty, Complutense University, 28040 Madrid, Spain; (M.M.); (C.R.); (A.S.); (C.C.); (D.P.)
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Guo J, Zhao J, Liu R, Yu J, Zhang M, Wang H, Liu L. Metabolomics analysis of serum in pediatric nephrotic syndrome based on targeted and non-targeted platforms. Metabolomics 2021; 17:38. [PMID: 33788045 DOI: 10.1007/s11306-021-01788-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 03/16/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND AIMS Nephrotic syndrome (NS) is a common pediatric urinary system disease. The aim in this work was to investigate the changes in pediatric NS-related metabolites through serum metabolomics, and explore the new potential metabolites and differential metabolic pathways. METHODS Serum samples from 40 pediatric patients with nephrotic syndrome and 40 healthy controls were collected. The targeted and non-targeted metabolomics analyses were performed to determine the metabolic changes in pediatric NS. Based on multivariate statistical analysis and the regression model, the serum potential metabolites were screened and different metabolic pathways were explored. RESULTS 39 differential metabolites in pediatric NS were obtained based on the metabolomics analysis. 12 differential metabolites (serine, C18: 2 (EFA), C18: 2 (FFA), Isonuatigenin 3- [rhamnosyl- (1- > 2) -glucoside], C18: 4 (EFA), C18: 4 (FFA), caprylic acid, citric acid, methylmalonic acid, caproic acid, canavalioside and uroporphyrin were identified to establish the diagnostic model for pediatric NS. Five metabolic pathways including TCA cycle, amino acid metabolism, bile acid biosynthesis, linoleate metabolism and glyoxylate and dicarboxylate metabolism were the key differential metabolic pathways. CONCLUSION These data elucidated the metabolic alterations associated with pediatric NS and suggested a new diagnosis model for monitoring pediatric NS. The current study provides the useful information to bridge the gaps in our understanding of the metabolic alterations associated with pediatric NS and might facilitate the characterization of pediatric NS patients by performing serum metabolomics.
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Affiliation(s)
- Jing Guo
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, 150086, People's Republic of China
| | - Jinhui Zhao
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, 150086, People's Republic of China
| | - Rui Liu
- The Department of Clinical Nutrition, Southern University of Science and Technology Hospital, Shenzhen, People's Republic of China
| | - Jiaying Yu
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, 150086, People's Republic of China
| | - Mingjia Zhang
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, 150086, People's Republic of China
| | - Hanming Wang
- Department of Infectious Diseases, Harbin Children's Hospital, 57 Youyi Road, Daoli District, Harbin, People's Republic of China
| | - Liyan Liu
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, 150086, People's Republic of China.
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Mosquera DMG, Ortega YH, Quero PC, Martínez RS, Pieters L. Antiurolithiatic activity of Boldoa purpurascens aqueous extract: An in vitro and in vivo study. JOURNAL OF ETHNOPHARMACOLOGY 2020; 253:112691. [PMID: 32092500 DOI: 10.1016/j.jep.2020.112691] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 02/19/2020] [Accepted: 02/19/2020] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Boldoa purpurascens Cav. (Nyctaginaceae) is a plant species used in traditional medicine in Cuba as antiurolithiatic. AIM OF THE STUDY The aim of the present investigation was to evaluate the in vitro and in vivo antiurolothiatic activity of an aqueous extract from the leaves of Boldoa purpurascens. MATERIALS AND METHODS The aqueous extract from leaves of Boldoa purpurascens was evaluated for antiurolithiatic activity in vitro and in vivo. In vitro crystallization of calcium oxalate (CaOx) was assessed using a nucleation, aggregation and growth assay. The effects of the extract and of Cystone®, used as a positive control, on the slope of nucleation and aggregation, as well as on the growth of CaOx crystals, were evaluated spectrophotometrically. The densities of the formed crystals were compared microscopically. In vivo activity was evaluated in an urolithiasis model in rats, in which kidney stones are induced by ethylene glycol (0.75%) and ammonium chloride (2%) in drinking water for 10 days. Three different experimental doses (100, 200 and 400 mg/kg, p.o.) of the extract and Cystone® were administered for 10 days. After 10 days, various biochemical parameters were measured in urine and serum, and histopathological analysis of the kidneys was carried out. RESULTS The aqueous extract of Boldoa purpurascens inhibited the slope of nucleation and aggregation of CaOx crystallization, and decreased the crystal density. It also inhibited the growth and caused the dissolution of CaOx crystals. Cystone® exhibited similar effects. At a dose of 400 mg/kg the extract reduced the concentration of uric acid in urine, as well as the serum concentration of uric acid and creatinine. Histopathologic analysis of the kidneys of the same treatment group revealed reduced tissue damage; the results were almost similar to the untreated healthy control group. CONCLUSION This study indicates that an aqueous leaf extract of Boldoa purpurascens may be effective in the prevention of urinary stone formation, and substantiates the traditional claim.
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Affiliation(s)
| | | | - Pedro César Quero
- Chemical Bioactive Center, Central University ‟Marta Abreu of Las Villas", Cuba
| | | | - Luc Pieters
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Science, University of Antwerpen, Belgium.
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Yang A, Guo H, Fu M, Liu M. Inhibitive Effects of Huashi Pill on Formation of Renal Stones by Modulating Urine Biochemical Indexes and Osteopontin in Renal Stone Rat Models. Med Sci Monit 2019; 25:8335-8344. [PMID: 31690714 PMCID: PMC6857440 DOI: 10.12659/msm.916247] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Background Renal stones are the accumulated or deposited crystals that form and appear in supersaturated urine. This study aimed to the investigate the therapeutic effects of Huashi Pill on clearance of renal stones. Material/Methods Sprague Dawley rats were divided into normal control, positive control, low-dosage Huashi Pill, medium-dosage Huashi Pill, and high-dosage Huashi Pill groups. A renal rat model was established by using ethylene glycol, ammonium chloride, and calcium gluconate. The urinary pH, urine protein, and uric acid levels, as well as the calcium, magnesium, and phosphorus levels were examined. The blood urea nitrogen (BUN) and creatinine (Cr) levels were also evaluated. Aspartate aminotransferase (AST), alanine aminotransferase (ALT), and total bilirubin (TBIL) levels were evaluated. Crystal formation and calcium deposits were examined using hematoxylin and eosin (H and E) staining and von Kossa staining, respectively. Osteopontin (OPN) expression was evaluated with quantitative real-time polymerase chain reaction assay and immunohistochemical assay. Results A renal stone rat model was successfully established. Huashi Pill significantly improved water and food intake and enhanced pH value of urine (P<0.05). Huashi Pill significantly improved the liver functions by decreasing ALT and TBIL levels (P<0.05). Huashi Pill regulated the amounts of microelements. Huashi Pill significantly decreased the urine protein, uric acid, and Cr levels (P<0.05). Huashi Pill inhibited formation of stone crystals and reduced the insoluble calcium deposition. Huashi Pill significantly downregulated expression of OPN in the kidney tissues of renal rat models (P<0.05). Conclusions Huashi Pill inhibited stone formation by regulating urine biochemical indexes and reducing OPN expression in kidney tissue in a renal stone rat model.
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Affiliation(s)
- Ailing Yang
- Medical Laboratory Center, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China (mainland)
| | - Huimeng Guo
- Medical Laboratory Center, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China (mainland)
| | - Manling Fu
- School of Nursing, Southwest Medical University, Luzhou, Sichuan, China (mainland)
| | - Minyong Liu
- Medical Device Research and Development Room, Southwest Medical University, Luzhou, Sichuan, China (mainland)
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Joshi S, Khan SR. Opportunities for future therapeutic interventions for hyperoxaluria: targeting oxidative stress. Expert Opin Ther Targets 2019; 23:379-391. [PMID: 30905219 DOI: 10.1080/14728222.2019.1599359] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Oxalate is a toxic byproduct of metabolism and is normally produced in quantities easily removed from the body. However, under specific circumstances oxalate production is increased resulting in deposition of calcium oxalate (CaOx) crystals in the kidneys as well as other organs causing inflammation and injury. Excessive buildup of crystal deposits in the kidneys causes eventual loss of renal function requiring renal transplantation. Areas covered: Cellular exposure to CaOx crystals induces the production of reactive oxygen species (ROS) with the involvement of renin-angiotensin aldosterone system (RAAS), mitochondria, and NADPH oxidase. Inflammasomes are activated and pro-inflammatory cytokines, such as IL-1β and IL-18 are produced. We reviewed results of experimental and clinical studies of crystal renal epithelial cell interactions with emphasis on cellular injury and ROS production. Expert opinion: Treatment should depend upon the level of hyperoxaluria and whether it is associated with CaOx crystal deposition. Persistent low grade or intermittent hyperoxaluria can be treated with antioxidants, free radical scavengers. Hyperoxaluria associated with CaOx crystal deposition will require administration of angiotensin II receptor blockers, and NADPH oxidase or NLRP3 inflammasome inhibitors. DASH-style diet will be beneficial in both cases.
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Affiliation(s)
- Sunil Joshi
- a Department of Pathology, Immunology & Laboratory Medicine, College of Medicine , University of Florida , Gainesville , FL , USA
| | - Saeed R Khan
- a Department of Pathology, Immunology & Laboratory Medicine, College of Medicine , University of Florida , Gainesville , FL , USA
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Assimos DG. Re: Transcriptional Study of Hyperoxaluria and Calcium Oxalate Nephrolithiasis in Male Rats: Inflammatory Changes are Mainly Associated with Crystal Deposition. J Urol 2018. [DOI: 10.1016/j.juro.2018.05.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Protective effect of pentoxifylline on oxidative renal cell injury associated with renal crystal formation in a hyperoxaluric rat model. Urolithiasis 2018; 47:415-424. [PMID: 29980797 DOI: 10.1007/s00240-018-1072-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 06/25/2018] [Indexed: 12/25/2022]
Abstract
The aim of the study is to investigate the effects of pentoxifylline (PTX) on the renal tubular cell injury and stone formation in a hyperoxaluric rat model induced by ethylene glycol and its possible underlying mechanisms. The study was performed with 30 male Wistar rats and randomized into three groups of teen. The sham-control (group 1) received only drinking water orally. The EG/untreated (group 2) received drinking water containing 0.75% EG for 4 weeks orally. The EG/PTX treated (group 3) received drinking water containing 0.75% EG for 4 weeks orally and PTX. Urine and blood were collected to determine some parameters. The kidneys were also removed for histological examination. Serum and urinary parameters were significantly improved in the EG/PTX treated. In the EG/PTX-treated group, the MDA, TOS and MPO activity reduced and the TAS, SOD, CAT and GSH-Px activities were increased markedly compared with the group 2. In urine of the group 2 rats, a large number of CaOx crystals were displayed and most tubules that contained crystals were dilated and showed degeneration, necrosis, and desquamation of the lining epithelium. Only few CaOx crystals were r in EG/PTX-treated animal's urine. Mild tissue damage was observed in PTX-treated rats. iNOS expression was significantly elevated in the group 2. In contrast, in the EG/PTX-treated group, eNOS expression in renal tubular epithelial cells was increased. Current study indicates that PTX may partially reduce renal tubular injury resulting from hyperoxaluria-induced oxidative and nitrosative stress.
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Khan A. Prevalence, pathophysiological mechanisms and factors affecting urolithiasis. Int Urol Nephrol 2018; 50:799-806. [PMID: 29569213 DOI: 10.1007/s11255-018-1849-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 03/14/2018] [Indexed: 10/17/2022]
Abstract
The formation of urinary stone, urolithiasis, is one the oldest known disease affecting human throughout different civilizations and times. The exact pathophysiological mechanism of urolithiasis is not yet clear, as these calculi are of various types and too complex for simple understanding. A single theory cannot explain its formation; therefore, different theories are presented in various times for its explanation like free particle, fixed particle, Randall's plaque theory. In addition, various factors and components are identified that play an important role in the formation of these urinary calculi. In this review, composition of kidney stones, its prevalence/incidence, explanation of pathophysiological mechanisms and role of various factors; urinary pH, uric acid, parathyroid hormone, citrate, oxalate, calcium and macromolecules; osteopontin, matrix Gla protein, kidney injury molecules, urinary prothrombin fragment-1, Tamm-Horsfall protein, inter-α-inhibitors, have been discussed in detail.
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Affiliation(s)
- Aslam Khan
- Basic Sciences Department, College of Science and Health Professions-(COSHP-J), King Saud bin Abdulaziz University for Health Sciences, Mail Code: 6666, P.O. Box 9515, Jeddah, 21423, Kingdom of Saudi Arabia.
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Evaluation of anti-urolithiatic and diuretic activities of watermelon (Citrullus lanatus) using in vivo and in vitro experiments. Biomed Pharmacother 2018; 97:1212-1221. [DOI: 10.1016/j.biopha.2017.10.162] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 10/14/2017] [Accepted: 10/28/2017] [Indexed: 11/24/2022] Open
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Panigrahi PN, Dey S, Sahoo M, Dan A. Antiurolithiatic and antioxidant efficacy of Musa paradisiaca pseudostem on ethylene glycol-induced nephrolithiasis in rat. Indian J Pharmacol 2017; 49:77-83. [PMID: 28458427 PMCID: PMC5351243 DOI: 10.4103/0253-7613.201026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVE Musa paradisiaca has been used in the treatment of urolithiasis by the rural people in South India. Therefore, we plan to evaluate its efficacy and possible mechanism of antiurolithiatic effect to rationalize its medicinal use. MATERIALS AND METHODS Urolithiasis was induced in hyperoxaluric rat model by giving 0.75% ethylene glycol (EG) for 28 days along with 1% ammonium chloride (AC) for the first 14 days. Antiurolithiatic effect of aqueous-ethanol extract of M. paradisiaca pseudostem (MUSA) was evaluated based on urine and serum biochemistry, microscopy of urine, oxidative/nitrosative indices, kidney calcium content, and histopathology. RESULTS Administration of EG and AC resulted in increased crystalluria and oxaluria, hypercalciuria, polyuria, crystal deposition in urine, raised serum urea, and creatinine as well as nitric oxide concentration and erythrocytic lipid peroxidation in lithiatic group. However, MUSA treatment significantly restored the impairment in above kidney function test as that of standard treatment, cystone in a dose-dependent manner. CONCLUSIONS The present findings demonstrate the efficacy of MUSA in EG-induced urolithiasis, which might be mediated through inhibiting various pathways involved in renal calcium oxalate formation, antioxidant effect, and potential to inhibit biochemical markers of renal impairment.
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Affiliation(s)
- Padma Nibash Panigrahi
- Division of Medicine, Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India.,Division of Veterinary Medicine, Faculty of Veterinary and Animal Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Sahadeb Dey
- Division of Medicine, Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Monalisa Sahoo
- Division of Pathology, Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Ananya Dan
- Division of Medicine, Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
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Assimos DG. Re: Calcium Oxalate Induces Renal Injury through Calcium-Sensing Receptor. J Urol 2017. [DOI: 10.1016/j.juro.2017.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Panigrahi PN, Dey S, Sahoo M, Choudhary SS, Mahajan S. Alteration in Oxidative/nitrosative imbalance, histochemical expression of osteopontin and antiurolithiatic efficacy of Xanthium strumarium (L.) in ethylene glycol induced urolithiasis. Biomed Pharmacother 2016; 84:1524-1532. [PMID: 27876212 DOI: 10.1016/j.biopha.2016.11.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 10/24/2016] [Accepted: 11/08/2016] [Indexed: 02/03/2023] Open
Abstract
Xanthium strumarium has traditionally been used in the treatment of urolitiasis especially by the rural people in India, but its antiurolithiatic efficacy was not explored scientifically till now. Therefore, the present study was designed to validate the ethnic practice scientifically, and explore the possible antiurolithiatic effect to rationalize its medicinal use. Urolitiasis was induced in hyperoxaluric rat model by giving 0.75% ethylene glycol (EG) for 28days along with 1% ammonium chloride (AC) for first 14days. Antiurolithiatic effect of aqueous-ethanol extract of Xanthium strumarium bur (xanthium) was evaluated based on urine and serum biochemistry, oxidative/nitrosative stress indices, histopathology, kidney calcium and calcium oxalate content and immunohistochemical expression of matrix glycoprotein, osteopontin (OPN). Administration of EG and AC resulted in hyperoxaluria, crystalluria, hypocalciuria, polyurea, raised serum urea, creatinine, erythrocytic lipid peroxidise and nitric oxide, kidney calcium content as well as crystal deposition in kidney section in lithiatic group rats. However, xanthium treatment significantly restored the impairment in above kidney function test as that of standard treatment, cystone. The up-regulation of OPN was also significantly decreased after xanthium treatment. The present findings demonstrate the curative efficacy of xanthium in ethylene glycol induced urolithiasis, possibly mediated through inhibition of various pathways involved in renal calcium oxalate formation, antioxidant property and down regulation of matrix glycoprotein, OPN. Therefore, future studies may be established to evaluate its efficacy and safety for clinical use.
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Affiliation(s)
- Padma Nibash Panigrahi
- Division of Medicine, Indian Veterinary Research Institute, Izatnagar, Bareilly Uttar Pradesh-243122, India; Division of Medicine, Faculty of Veterinary and Animal Science, Banaras Hindu University, Varanasi, Uttar Pradesh-221005, India.
| | - Sahadeb Dey
- Division of Medicine, Indian Veterinary Research Institute, Izatnagar, Bareilly Uttar Pradesh-243122, India
| | - Monalisa Sahoo
- Division of Pathology, Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh-243122, India
| | - Shyam Sundar Choudhary
- Division of Medicine, Indian Veterinary Research Institute, Izatnagar, Bareilly Uttar Pradesh-243122, India
| | - Sumit Mahajan
- Division of Medicine, Indian Veterinary Research Institute, Izatnagar, Bareilly Uttar Pradesh-243122, India
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Calcium Oxalate Induces Renal Injury through Calcium-Sensing Receptor. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:5203801. [PMID: 27965733 PMCID: PMC5124692 DOI: 10.1155/2016/5203801] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 07/29/2016] [Accepted: 10/05/2016] [Indexed: 01/24/2023]
Abstract
Objective. To investigate whether calcium-sensing receptor (CaSR) plays a role in calcium-oxalate-induced renal injury. Materials and Methods. HK-2 cells and rats were treated with calcium oxalate (CaOx) crystals with or without pretreatment with the CaSR-specific agonist gadolinium chloride (GdCl3) or the CaSR-specific antagonist NPS2390. Changes in oxidative stress (OS) in HK-2 cells and rat kidneys were assessed. In addition, CaSR, extracellular signal-regulated protein kinase (ERK), c-Jun N-terminal protein kinase (JNK), and p38 expression was determined. Further, crystal adhesion assay was performed in vitro, and the serum urea and creatinine levels and crystal deposition in the kidneys were also examined. Results. CaOx increased CaSR, ERK, JNK, and p38 protein expression and OS in vitro and in vivo. These deleterious changes were further enhanced upon pretreatment with the CaSR agonist GdCl3 but were attenuated by the specific CaSR inhibitor NPS2390 compared with CaOx treatment alone. Pretreatment with GdCl3 further increased in vitro and in vivo crystal adhesion and renal hypofunction. In contrast, pretreatment with NPS2390 decreased in vitro and in vivo crystal adhesion and renal hypofunction. Conclusions. CaOx-induced renal injury is related to CaSR-mediated OS and increased mitogen-activated protein kinase (MAPK) signaling, which subsequently leads to CaOx crystal adhesion.
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An Explanation of the Underlying Mechanisms for the In Vitro and In Vivo Antiurolithic Activity of Glechoma longituba. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:3134919. [PMID: 27840669 PMCID: PMC5093267 DOI: 10.1155/2016/3134919] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 08/26/2016] [Accepted: 09/27/2016] [Indexed: 11/18/2022]
Abstract
Purpose. To use in vitro and in vivo models to evaluate Glechoma longituba extract to provide scientific evidence for this extract's antiurolithic activity. Materials and Methods. Potassium citrate was used as a positive control group. Oxidative stress (OS) markers and the expression of osteopontin (OPN) and kidney injury molecule-1 (KIM-1) were measured to assess the protective effects of Glechoma longituba. Multiple urolithiasis-related biochemical parameters were evaluated in urine and serum. Kidneys were harvested for histological examination and the assessment of crystal deposits. Results. In vitro and in vivo experiments demonstrated that treatment with Glechoma longituba extract significantly decreased calcium oxalate- (CaOx-) induced OPN expression, KIM-1 expression, and OS compared with the positive control group (P < 0.05). Additionally, in vivo rats that received Glechoma longituba extract exhibited significantly decreased CaOx deposits and pathological alterations (P < 0.05) compared with urolithic rats. Significantly lower levels of oxalate, creatinine, and urea and increased citrate levels were observed among rats that received Glechoma longituba (P < 0.05) compared with urolithic rats. Conclusion. Glechoma longituba has antiurolithic effects due to its possible combined effects of increasing antioxidant levels, decreasing urinary stone-forming constituents and urolithiasis-related protein expression, and elevating urinary citrate levels.
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Abstract
Nephrolithiasis (NL) is one of the most prevalent nontransmissible diseases in western countries. It is being associated with other frequent diseases, including osteoporosis, cardiovascular disease, hypertension, diabetes mellitus, through a putative common link with metabolic syndrome and insulin resistance or altered mineral metabolism. This review will focus on classification, physicochemical basis, risk factors, laboratory and imaging investigations, medical management.Classification as to stone composition includes calcium, uric acid (UA), cystine (Cys), infected, 2-8 dihydroxyadenine and rare NL. According to pathophysiology, NL is classified as primary, secondary to systemic diseases or drugs, caused by renal or metabolic hereditary disorders.A stone can only form in supersaturated environment, and this is sufficient in UA, Cys and infected NL, but not in Ca-NL, which results from the imbalance between supersaturation and inhibition. All types are characterized by derangements of peculiar risk factors. Laboratory investigations aim at identifying type of NL, underlying risk factors and state of saturation, and pathophysiology. This justifies a rationale therapy able to dissolve some types of stones and/or produce reduction in recurrence rate in others.Medical management includes alkali and allopurinol for UA nephrolithiasis (UA-NL), thiols and alkali in Cys-NL, dietary and pharmacological intervention for Ca-NL. Thiazides and alkaline citrate salts are the most widely used drugs in Ca-NL, where they proved efficient to prevent new stones. Other drugs have only been used in particular subsets.Proper medical management and modern urological approaches have already notably improved clinical outcomes. Future studies will further clarify mechanisms of NL with expected new and targeted therapeutic options.
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Metabolic disturbances in Chinese children with urolithiasis: a single center report. Urolithiasis 2016; 45:285-290. [PMID: 27510800 DOI: 10.1007/s00240-016-0910-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 08/02/2016] [Indexed: 10/21/2022]
Abstract
Urinary stones and urine composition are the first steps in the process of recurrence prevention, but data concerning the association between the two compositions are scarce in Chinese children with urolithiasis. We retrospectively analyzed the records of children (age range 0-18 years) with urolithiasis in our center between March 2004 and December 2013. Stone analysis was carried out in 382 children and 24-hour urine analysis in 80 children. Analysis of both stone and 24-hour urine composition was completed in 56 children. Stone samples were analyzed by Fourier transform-infrared spectrometry. The major stone constituents were calcium oxalate (78.8 %). Of 80 children with 24 h urine analysis, only 2.5 % were without urinary metabolic abnormalities. Hypocitraturia was recorded in 97.5 %, high sodium excretion in 50.0 %, cystinuria in 48.7 %, hypercalciuria in 18.8 %, small urine volumes in 12.5 %, hyperoxaluria in 5.0 % and hyperuricosuria in 1.3 %. Interestingly, higher urine volumes were recorded in girls than in boys (73.2 ± 58.5 vs 51.3 ± 45.3 mL/kg, p = 0.036). Urine sodium (p = 0.002) and oxalate (p = 0.004) were significantly higher in children >9 year old. Moreover, compared with calcium oxalate stone formers, the urine volume (p = 0.040), citrate (p = 0.007) and cystine (p = 0.004) were higher in patients with cystine stones. Hypocitraturia was the common abnormality among Chinese children with urolithiasis. The surprisingly high incidence of cystinuria is of note.
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Sarica K, Kafkasli A, Narter F, Ozturk O, Yazici O, Hamarat B, Sahin C, Eryildirim B. Hyperoxaluria-induced tubular ischemia: the effects of verapamil on the antioxidant capacity of the affected kidneys. Urolithiasis 2016; 44:509-519. [DOI: 10.1007/s00240-016-0894-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 06/02/2016] [Indexed: 11/28/2022]
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Lee JE, Lee YH, Kim SY, Kim YG, Moon JY, Jeong KH, Lee TW, Ihm CG, Kim S, Kim KH, Kim DK, Kim YS, Kim CD, Park CW, Lee DY, Lee SH. Systematic biomarker discovery and coordinative validation for different primary nephrotic syndromes using gas chromatography-mass spectrometry. J Chromatogr A 2016; 1453:105-15. [PMID: 27247212 DOI: 10.1016/j.chroma.2016.05.058] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 05/04/2016] [Accepted: 05/15/2016] [Indexed: 11/24/2022]
Abstract
The goal of this study is to identify systematic biomarker panel for primary nephrotic syndromes from urine samples by applying a non-target metabolite profiling, and to validate their utility in independent sampling and analysis by multiplex statistical approaches. Nephrotic syndrome (NS) is a nonspecific kidney disorder, which is mostly represented by minimal change disease (MCD), focal segmental glomerulosclerosis (FSGS), and membranous glomerulonephritis (MGN). Since urine metabolites may mirror disease-specific functional perturbations in kidney injury, we examined urine samples for distinctive metabolic changes to identify biomarkers for clinical applications. We developed unbiased multi-component covarianced models from a discovery set with 48 samples (12 healthy controls, 12 MCD, 12 FSGS, and 12 MGN). To extensively validate their diagnostic potential, new batch from 54 patients with primary NS were independently examined a year after. In the independent validation set, the model including citric acid, pyruvic acid, fructose, ethanolamine, and cysteine effectively discriminated each NS using receiver operating characteristic (ROC) analysis except MCD-MGN comparison; nonetheless an additional metabolite multi-composite greatly improved the discrimination power between MCD and MGN. Finally, we proposed the re-constructed metabolic network distinctively dysregulated by the different NSs that may deepen comprehensive understanding of the disease mechanistic, and help the enhanced identification of NS and therapeutic plans for future.
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Affiliation(s)
- Jung-Eun Lee
- The Dept. of Bio and Fermentation Convergence Technology, BK21 PLUS project, Kookmin University, Seoul, Republic of Korea; Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Yu Ho Lee
- Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Se-Yun Kim
- Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Yang Gyun Kim
- Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Ju-Young Moon
- Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Kyung-Hwan Jeong
- Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Tae Won Lee
- Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Chun-Gyoo Ihm
- Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Sooah Kim
- The Dept. of Biotechnology, Graduate School, Korea University, Seoul, Republic of Korea
| | - Kyoung Heon Kim
- The Dept. of Biotechnology, Graduate School, Korea University, Seoul, Republic of Korea
| | - Dong Ki Kim
- Division of Nephrology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yon Su Kim
- Division of Nephrology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Chan-Duck Kim
- Division of Nephrology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea
| | - Cheol Whee Park
- Division of Nephrology, Department of Internal Medicine, College of Medicine, The St. Mary's Hospital of Catholic University of Korea, Seoul, Republic of Korea
| | - Do Yup Lee
- The Dept. of Bio and Fermentation Convergence Technology, BK21 PLUS project, Kookmin University, Seoul, Republic of Korea.
| | - Sang-Ho Lee
- Division of Nephrology, Department of Internal Medicine, College of medicine, Kyung Hee University, Seoul, Republic of Korea.
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Osis G, Handlogten ME, Lee HW, Hering-Smith KS, Huang W, Romero MF, Verlander JW, Weiner ID. Effect of NBCe1 deletion on renal citrate and 2-oxoglutarate handling. Physiol Rep 2016; 4:e12778. [PMID: 27117802 PMCID: PMC4848728 DOI: 10.14814/phy2.12778] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 03/29/2016] [Accepted: 04/01/2016] [Indexed: 12/03/2022] Open
Abstract
UNLABELLED The bicarbonate transporter, NBCe1 (SLC4A4), is necessary for at least two components of the proximal tubule contribution to acid-base homeostasis, filtered bicarbonate reabsorption, and ammonia metabolism. This study's purpose was to determine NBCe1's role in a third component of acid-base homeostasis, organic anion metabolism, by studying mice with NBCe1 deletion. Because NBCe1 deletion causes metabolic acidosis, we also examined acid-loaded wild-type adult mice to determine if the effects of NBCe1 deletion were specific to NBCe1 deletion or were a non-specific effect of the associated metabolic acidosis. Both NBCe1 KO and acid-loading decreased citrate excretion, but in contrast to metabolic acidosis alone, NBCe1 KO decreased expression of the apical citrate transporter, NaDC-1. Thus, NBCe1 expression is necessary for normal NaDC-1 expression, and NBCe1 deletion induces a novel citrate reabsorptive pathway. Second, NBCe1 KO increased 2-oxoglutarate excretion. This could not be attributed to the metabolic acidosis as experimental acidosis decreased excretion. Increased 2-oxoglutarate excretion could not be explained by changes in plasma 2-oxoglutarate levels, the glutaminase I or the glutaminase II generation pathways, 2-oxoglutarate metabolism, its putative apical 2-oxoglutarate transporter, OAT10, or its basolateral transporter, NaDC-3. IN SUMMARY (1) NBCe1 is necessary for normal proximal tubule NaDC-1 expression; (2) NBCe1 deletion results in stimulation of a novel citrate reabsorptive pathway; and (3) NBCe1 is necessary for normal 2-oxoglutarate metabolism through mechanisms independent of expression of known transport and metabolic pathways.
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Affiliation(s)
- Gunars Osis
- Division of Nephrology, Hypertension and Renal Transplantation, University of Florida College of Medicine, Gainesville, Florida
| | - Mary E Handlogten
- Division of Nephrology, Hypertension and Renal Transplantation, University of Florida College of Medicine, Gainesville, Florida
| | - Hyun-Wook Lee
- Division of Nephrology, Hypertension and Renal Transplantation, University of Florida College of Medicine, Gainesville, Florida
| | | | - Weitao Huang
- Renal Division, Tulane University College of Medicine, New Orleans, Louisiana
| | - Michael F Romero
- Department of Physiology & Biomedical Engineering and Nephrology & Hypertension, Mayo Clinic College Of Medicine, Rochester, Minnesota
| | - Jill W Verlander
- Division of Nephrology, Hypertension and Renal Transplantation, University of Florida College of Medicine, Gainesville, Florida
| | - I David Weiner
- Division of Nephrology, Hypertension and Renal Transplantation, University of Florida College of Medicine, Gainesville, Florida Nephrology and Hypertension Section, North Florida/South Georgia Veterans Health System, Gainesville, Florida
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Bhagavathula AS, Mahmoud Al-Khatib AJ, Elnour AA, Al Kalbani NMS, Shehab A. Ammi Visnaga in treatment of urolithiasis and hypertriglyceridemia. Pharmacognosy Res 2015; 7:397-400. [PMID: 26692756 PMCID: PMC4660521 DOI: 10.4103/0974-8490.167894] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Ammi visnaga is a widely distributed Ancient Egyptian medicinal plant used for treatment of several diseases including urolithiasis (kidney stones). The active chemical constituents’ khellin and visnagin obtained from the A. visnaga seeds have activity of antilithiogenic and pleiotropic. However, little is known about its activity on hypertriglyceridemia. The main aim of this review is to explore the use of A. visnaga in urolithiasis and to present a case of relevancy. We highlighted a case of a patient who has recurrent urethral stones and hypertriglyceridemia. The patient was treated with A. visnaga seeds, has recovered completely from ureteral stones and his high-density lipoprotein (HDL)-cholesterol low levels retained to normal after using of A. visnaga seeds for 10 days. The present case of A. visnaga seeds being local medicinal plant has shown the effect in treating urolithiasis with extended effect on raising HDL-cholesterol. These results may provide insights for in vitro studies for isolation of these biologically active compounds for potential in raising HDL-cholesterol. Whether or not the later effect can have clinical utility remains to be explored.
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Affiliation(s)
| | | | - Asim Ahmed Elnour
- Department of Pharmacology, College of Medicine and Health Sciences, UAE University, Al Ain, UAE
| | | | - Abdulla Shehab
- Department of Internal Medicine, College of Medicine and Health Sciences, UAE University, Al Ain, UAE
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Saha S, Goswami G, Pandrangi A. Isolation and prevention of calcium oxalate-induced apoptotic death and oxidative stress in MDCK cells by diosgenin. Chem Biol Interact 2014; 224:51-7. [DOI: 10.1016/j.cbi.2014.09.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 08/29/2014] [Accepted: 09/23/2014] [Indexed: 11/30/2022]
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Increased oxidative DNA damage seen in renal biopsies adjacent stones in patients with nephrolithiasis. Urolithiasis 2014; 42:387-94. [DOI: 10.1007/s00240-014-0676-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 06/09/2014] [Indexed: 12/21/2022]
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Niimi K, Yasui T, Okada A, Hirose Y, Kubota Y, Umemoto Y, Kawai N, Tozawa K, Kohri K. Novel effect of the inhibitor of mitochondrial cyclophilin D activation, N-methyl-4-isoleucine cyclosporin, on renal calcium crystallization. Int J Urol 2014; 21:707-13. [PMID: 24661223 DOI: 10.1111/iju.12425] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 01/30/2014] [Indexed: 12/28/2022]
Abstract
OBJECTIVES To experimentally evaluate the clinical application of N-methyl-4-isoleucine cyclosporin, a novel selective inhibitor of cyclophilin D activation. METHODS In vitro, cultured renal tubular cells were exposed to calcium oxalate monohydrate crystals and treated with N-methyl-4-isoleucine cyclosporin. The mitochondrial membrane was stained with tetramethylrhodamine ethyl ester perchlorate and observed. In vivo, Sprague-Dawley rats were divided into four groups: a control group, an ethylene glycol group (administration of ethylene glycol to induce renal calcium crystallization), a N-methyl-4-isoleucine cyclosporin group (administration of N-methyl-4-isoleucine cyclosporin) and an ethylene glycol + N-methyl-4-isoleucine cyclosporin group (administration of ethylene glycol and N-methyl-4-isoleucine cyclosporin). Renal calcium crystallization was evaluated using Pizzolato staining. Oxidative stress was evaluated using superoxide dismutase and 8-hydroxy-deoxyguanosine. Mitochondria within renal tubular cells were observed by transmission electron microscopy. Cell apoptosis was evaluated using cleaved caspase-3. RESULTS In vitro, calcium oxalate monohydrate crystals induced depolarization of the mitochondrial membrane potential, which was remarkably prevented by N-methyl-4-isoleucine cyclosporin. In vivo, ethylene glycol administration induced renal calcium crystallization, oxidative stress, mitochondrial collapse and cell apoptosis in rats, which were significantly prevented by N-methyl-4-isoleucine cyclosporin. CONCLUSIONS Herein we first report a new treatment agent determining renal calcium crystallization through cyclophilin D activation.
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Affiliation(s)
- Kazuhiro Niimi
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
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Domingos F, Serra A. Metabolic syndrome: A multifaceted risk factor for kidney stones. Scand J Urol 2014; 48:414-9. [DOI: 10.3109/21681805.2014.903513] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Worcester EM, Evan AP, Coe FL, Lingeman JE, Krambeck A, Sommers A, Phillips CL, Milliner D. A test of the hypothesis that oxalate secretion produces proximal tubule crystallization in primary hyperoxaluria type I. Am J Physiol Renal Physiol 2013; 305:F1574-84. [PMID: 24089413 DOI: 10.1152/ajprenal.00382.2013] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The sequence of events by which primary hyperoxaluria type 1 (PH1) causes renal failure is unclear. We hypothesize that proximal tubule (PT) is vulnerable because oxalate secretion raises calcium oxalate (CaOx) supersaturation (SS) there, leading to crystal formation and cellular injury. We studied cortical and papillary biopsies from two PH1 patients with preserved renal function, and seven native kidneys removed from four patients at the time of transplant, after short-term (2) or longer term (2) dialysis. In these patients, and another five PH1 patients without renal failure, we calculated oxalate secretion, and estimated PT CaOx SS. Plasma oxalate was elevated in all PH1 patients and inverse to creatinine clearance. Renal secretion of oxalate was present in all PH1 but rare in controls. PT CaOx SS was >1 in all nonpyridoxine-responsive PH1 before transplant and most marked in patients who developed end stage renal disease (ESRD). PT from PH1 with preserved renal function had birefringent crystals, confirming the presence of CaOx SS, but had no evidence of cortical inflammation or scarring by histopathology or hyaluronan staining. PH1 with short ESRD showed CaOx deposition and hyaluronan staining particularly at the corticomedullary junction in distal PT while cortical collecting ducts were spared. Longer ESRD showed widespread cortical CaOx, and in both groups papillary tissue had marked intratubular CaOx deposits and fibrosis. CaOx SS in PT causes CaOx crystal formation, and CaOx deposition in distal PT appears to be associated with ESRD. Minimizing PT CaOx SS may be important for preserving renal function in PH1.
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Affiliation(s)
- Elaine M Worcester
- Nephrology Section, MC5100, Univ. of Chicago, School of Medicine, 5841 South Maryland Ave., Chicago, IL 60637.
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Catechin prevents the calcium oxalate monohydrate induced renal calcium crystallization in NRK-52E cells and the ethylene glycol induced renal stone formation in rat. Altern Ther Health Med 2013; 13:228. [PMID: 24044655 PMCID: PMC3849621 DOI: 10.1186/1472-6882-13-228] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 08/28/2013] [Indexed: 11/10/2022]
Abstract
BACKGROUND Reactive oxygen species play important roles in renal calcium crystallization. In this study, we examined the effects of catechin, which have been shown to have antioxidant properties on the renal calcium crystallization. METHODS In the vitro experiment, the changes of the mitochondrial membrane potential, expression of superoxide dismutase (SOD), 4-hydroxynonenal (4-HNE), cytochrome c, and cleaved caspase 3 were measured to show the effects of catechin treatment on the NRK-52E cells induced by calcium oxalate monohydrate (COM). In the vivo study, Sprague-Dawley rats were administered 1% ethylene glycol (EG) to generate a rat kidney stone model and then treated with catechin (2.5 and 10 mg/kg/day) for 14 days. The urine and serum variables were dected on 7 and 14 days after EG administration. The expression of cytochrome c, cleaved caspase 3, SOD, osteopontin (OPN), malondialdehyde (MDA), 8-hydroxy-2'-deoxyguanosine (8-OHdG) in kidney were measured. Furthermore, the mitochondrial microstructure in the kidney was also examined by transmission electron microscopy. RESULTS Catechin treatment could prevent the changes in mitochondrial membrane potential and expression of SOD, 4-HNE, cytochrome c, and cleaved caspase 3 in NRK-52E cells induced by the COM. For the in vivo experiments, the EG administration induced renal calcium crystallization was also prevented by the catechin. The expression of SOD, OPN, MDA, OPN and 8-OHdG, were increased after EG administration and this increase was diminished by catechin. Moreover, catechin also prevented EG induced mitochondrial collapse in rat. CONCLUSIONS Catechin has preventive effects on renal calcium crystallization both in vivo and in vitro, and provide a potential therapeutic treatment for this disease.
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Fujii Y, Okada A, Yasui T, Niimi K, Hamamoto S, Hirose M, Kubota Y, Tozawa K, Hayashi Y, Kohri K. Effect of adiponectin on kidney crystal formation in metabolic syndrome model mice via inhibition of inflammation and apoptosis. PLoS One 2013; 8:e61343. [PMID: 23630583 PMCID: PMC3632593 DOI: 10.1371/journal.pone.0061343] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Accepted: 03/07/2013] [Indexed: 12/03/2022] Open
Abstract
The aims of the present study were to elucidate a possible mechanism of kidney crystal formation by using a metabolic syndrome (MetS) mouse model and to assess the effectiveness of adiponectin treatment for the prevention of kidney crystals. Further, we performed genome-wide expression analyses for investigating novel genetic environmental changes. Wild-type (+/+) mice showed no kidney crystal formation, whereas ob/ob mice showed crystal depositions in their renal tubules. However, this deposition was remarkably reduced by adiponectin. Expression analysis of genes associated with MetS-related kidney crystal formation identified 259 genes that were >2.0-fold up-regulated and 243 genes that were <0.5-fold down-regulated. Gene Ontology (GO) analyses revealed that the up-regulated genes belonged to the categories of immunoreaction, inflammation, and adhesion molecules and that the down-regulated genes belonged to the categories of oxidative stress and lipid metabolism. Expression analysis of adiponectin-induced genes related to crystal prevention revealed that the numbers of up- and down-regulated genes were 154 and 190, respectively. GO analyses indicated that the up-regulated genes belonged to the categories of cellular and mitochondrial repair, whereas the down-regulated genes belonged to the categories of immune and inflammatory reactions and apoptosis. The results of this study provide compelling evidence that the mechanism of kidney crystal formation in the MetS environment involves the progression of an inflammation and immunoresponse, including oxidative stress and adhesion reactions in renal tissues. This is the first report to prove the preventive effect of adiponectin treatment for kidney crystal formation by renoprotective activities and inhibition of inflammation and apoptosis.
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Affiliation(s)
- Yasuhiro Fujii
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Atsushi Okada
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Takahiro Yasui
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Kazuhiro Niimi
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Shuzo Hamamoto
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Masahito Hirose
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yasue Kubota
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Keiichi Tozawa
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yutaro Hayashi
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Kenjiro Kohri
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
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Saito J, Matsuzawa Y, Ito H, Omura M, Kino T, Nishikawa T. Alkalizer administration improves renal function in hyperuricemia associated with obesity. JAPANESE CLINICAL MEDICINE 2013; 4:1-6. [PMID: 23966810 PMCID: PMC3742355 DOI: 10.4137/jcm.s10056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We evaluated the combination effect of the alkalizer citrate with the xanthine oxidase inhibitor allopurinol on renal function and uric acid in patients with hyperuricemia associated with obesity and/or metabolic syndrome (MetS), who were extracted from among the subjects enrolled in a prospective randomized controlled study aimed at assessing the efficacy of such a combination for improving renal function. We also conducted a post hoc analysis to examine influences on lipid profiles. Patients who consented to participate in the study were randomly allocated to receive either allopurinol alone (monotherapy) or in combination with a citrate preparation (combination therapy). The analysis population consisted of 31 obese patients with a body mass index greater than 25 kg/m2 (monotherapy, 15 patients; combination therapy, 16 patients). The creatinine clearance rate (Ccr), serum uric acid levels, and lipid profiles were measured before and at 12 weeks after the start of treatment. In the combination therapy group, Ccr increased significantly and serum uric acid levels decreased significantly in obese patients, while Ccr tended to increase and serum uric acid levels decreased, though not significantly, in patients with MetS-related clinical parameters. Overall, blood triglyceride levels tended to improve in the combination therapy group as compared with the monotherapy group.
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Affiliation(s)
- Jun Saito
- Division of Endocrinology and Metabolism, Endocrinology and Diabetic center, Department of Medicine, Yokohama Rosai Hospital
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Khan SR. Reactive oxygen species as the molecular modulators of calcium oxalate kidney stone formation: evidence from clinical and experimental investigations. J Urol 2012; 189:803-11. [PMID: 23022011 DOI: 10.1016/j.juro.2012.05.078] [Citation(s) in RCA: 245] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2012] [Indexed: 01/18/2023]
Abstract
PURPOSE Idiopathic calcium oxalate kidney stones form while attached to Randall plaques, the subepithelial deposits on renal papillary surfaces. Plaque formation and growth mechanisms are poorly understood. Plaque formation elsewhere in the body is triggered by reactive oxygen species and oxidative stress. This review explores possible reactive oxygen species involvement in plaque formation and calcium oxalate nephrolithiasis. MATERIALS AND METHODS A search of various databases for the last 8 years identified literature on reactive oxygen species involvement in calcium oxalate nephrolithiasis. The literature was reviewed and results are discussed. RESULTS Under normal conditions reactive oxygen species production is controlled, increasing as needed and regulating crystallization modulator production. Reactive oxygen species overproduction or decreased antioxidants lead to oxidative stress, inflammation and injury, and are involved in stone comorbidity. All major chronic inflammation markers are detectable in stone patient urine. Patients also have increased urinary excretion of the IαI and the thrombin protein families. Results of a recent study of 17,695 participants in NHANES III (National Health and Nutrition Examination Survey) showed significantly lower antioxidants, carotene and β-cryptoxanthin in those with a kidney stone history. Animal model and tissue culture studies revealed that high oxalate, calcium oxalate and calcium phosphate crystals provoked renal cell reactive oxygen species mediated inflammatory responses. Calcium oxalate crystals induce renin up-regulation and angiotensin II generation. Nonphagocytic NADPH oxidase leads to reactive oxygen species production mediated by protein kinase C. The P-38 MAPK/JNK transduction pathway is turned on. Transcriptional and growth factors, and generated secondary mediators become involved. Chemoattractant and osteopontin production is increased and macrophages infiltrate the renal interstitium around the crystal. Phagocytic NADPH oxidase is probably activated, producing additional reactive oxygen species. Localized inflammation, extracellular matrix and fibrosis develop. Crystallization modulators have a significant role in inflammation and tissue repair. CONCLUSIONS Based on available data, Randall plaque formation is similar to extracellular matrix mineralization at many body sites. Renal interstitial collagen becomes mineralized, assisting plaque growth through the interstitium until the mineralizing front reaches papillary surface epithelium. Plaque exposure to pelvic urine may also be a result of reactive oxygen species triggered epithelial sloughing.
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Affiliation(s)
- Saeed R Khan
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida College of Medicine, Gainesville, Florida 32610, USA.
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Kilicaslan I, Coskun S. Spontaneous stone passage: is it Ammi visnaga effect? ACTA ACUST UNITED AC 2012; 40:799-800. [PMID: 22990409 DOI: 10.1007/s00240-012-0509-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 09/04/2012] [Indexed: 11/27/2022]
Abstract
Ammi visnaga was used in Ancient Egypt as an herbal remedy for renal colic. "Khellin", a chemical obtained from Ammi visnaga, was used as a smooth muscle relaxant and has been thought to have pleiotropic effects on urolithiasis. We report a case with multiple ureteral stone passages possibly as a result of medication with an herb preparation, Khellin.
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Li K, Chen Y, Zhang W, Pu Z, Jiang L, Chen Y. Surface interactions affect the toxicity of engineered metal oxide nanoparticles toward Paramecium. Chem Res Toxicol 2012; 25:1675-81. [PMID: 22693953 DOI: 10.1021/tx300151y] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
To better understand the potential impacts of engineered metal oxide nanoparticles (NPs) in the ecosystem, we investigated the acute toxicity of seven different types of engineered metal oxide NPs against Paramecium multimicronucleatum, a ciliated protozoan, using the 48 h LC(50) (lethal concentration, 50%) test. Our results showed that the 48 h LC(50) values of these NPs to Paramecium ranged from 0.81 (Fe(2)O(3) NPs) to 9269 mg/L (Al(2)O(3) NPs); their toxicity to Paramecium increased as follows: Al(2)O(3) < TiO(2) < CeO(2) < ZnO < SiO(2) < CuO < Fe(2)O(3) NPs. On the basis of the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, interfacial interactions between NPs and cell membrane were evaluated, and the magnitude of interaction energy barrier correlated well with the 48 h LC(50) data of NPs to Paramecium; this implies that metal oxide NPs with strong association with the cell surface might induce more severe cytotoxicity in unicellular organisms.
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Affiliation(s)
- Kungang Li
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
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Studies on the in vitro and in vivo antiurolithic activity of Holarrhena antidysenterica. ACTA ACUST UNITED AC 2012; 40:671-81. [PMID: 22622371 DOI: 10.1007/s00240-012-0483-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 05/02/2012] [Indexed: 10/28/2022]
Abstract
Holarrhena antidysenterica has a traditional use in the treatment of urolithiasis, therefore, its crude extract has been investigated for possible antiurolithic effect. The crude aqueous-methanolic extract of Holarrhena antidysenterica (Ha.Cr) was studied using the in vitro and in vivo methods. In the in vitro experiments, Ha.Cr demonstrated a concentration-dependent (0.25-4 mg/ml) inhibitory effect on the slope of aggregation. It decreased the size of crystals and transformed the calcium oxalate monohydrate (COM) to calcium oxalate dehydrate (COD) crystals, in calcium oxalate metastable solutions. It also showed concentration-dependent antioxidant effect against 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radicals and lipid peroxidation induced in rat kidney tissue homogenate. Ha.Cr (0.3 mg/ml) reduced (p < 0.05) the cell toxicity and LDH release in renal epithelial cells (MDCK) exposed to oxalate (0.5 mM) and COM (66 μg/cm(2)) crystals. In male Wistar rats, receiving 0.75 % ethylene glycol (EG) for 21 days along with 1 % ammonium chloride (AC) in drinking water, Ha.Cr treatment (30-100 mg/kg) prevented the toxic changes caused by lithogenic agents; EG and AC, like loss of body weight, polyurea, oxaluria, raised serum urea and creatinine levels and crystal deposition in kidneys compared to their respective controls. These data indicate that Holarrhena antidysenterica possesses antiurolithic activity, possibly mediated through the inhibition of CaOx crystal aggregation, antioxidant and renal epithelial cell protective activities and may provide base for designing future studies to establish its efficacy and safety for clinical use.
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Niimi K, Yasui T, Hirose M, Hamamoto S, Itoh Y, Okada A, Kubota Y, Kojima Y, Tozawa K, Sasaki S, Hayashi Y, Kohri K. Mitochondrial permeability transition pore opening induces the initial process of renal calcium crystallization. Free Radic Biol Med 2012; 52:1207-17. [PMID: 22285391 DOI: 10.1016/j.freeradbiomed.2012.01.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 12/27/2011] [Accepted: 01/09/2012] [Indexed: 12/17/2022]
Abstract
Renal tubular cell injury induced by oxidative stress via mitochondrial collapse is thought to be the initial process of renal calcium crystallization. Mitochondrial collapse is generally caused by mitochondrial permeability transition pore (mPTP) opening, which can be blocked by cyclosporine A (CsA). Definitive evidence for the involvement of mPTP opening in the initial process of renal calcium crystallization, however, is lacking. In this study, we examined the physiological role of mPTP opening in renal calcium crystallization in vitro and in vivo. In the in vitro study, cultured renal tubular cells were exposed to calcium oxalate monohydrate (COM) crystals and treated with CsA (2 μM). COM crystals induced depolarization of the mitochondrial membrane potential and generated oxidative stress as evaluated by Cu-Zn SOD and 4-HNE. Furthermore, the expression of cytochrome c and cleaved caspase 3 was increased and these effects were prevented by CsA. In the in vivo study, Sprague-Dawley rats were administered 1% ethylene glycol (EG) to generate a rat kidney stone model and then treated with CsA (2.5, 5.0, and 10.0 mg/kg/day) for 14 days. EG administration induced renal calcium crystallization, which was prevented by CsA. Mitochondrial collapse was demonstrated by transmission electron microscopy, and oxidative stress was evaluated by measuring Cu-Zn SOD, MDA, and 8-OHdG generated by EG administration, all of which were prevented by CsA. Collectively, our results provide compelling evidence for a role of mPTP opening and its associated mitochondrial collapse, oxidative stress, and activation of the apoptotic pathway in the initial process of renal calcium crystallization.
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Affiliation(s)
- Kazuhiro Niimi
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan
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Hamamoto S, Yasui T, Okada A, Hirose M, Matsui Y, Kon S, Sakai F, Kojima Y, Hayashi Y, Tozawa K, Uede T, Kohri K. Crucial role of the cryptic epitope SLAYGLR within osteopontin in renal crystal formation of mice. J Bone Miner Res 2011; 26:2967-77. [PMID: 21898593 DOI: 10.1002/jbmr.495] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Osteopontin plays a crucial role in the formation of renal calcium crystals, which are primarily induced by renal tubular cell injury, especially mitochondrial damage. We have previously shown that the impaired Arg-Gly-Asp (RGD) sequence of osteopontin inhibits renal crystal formation by using OPN-transgenic mice and OPN-knockout (OPN-KO) mice. Here, we investigated the effects of an antimurine osteopontin antibody (35B6-Ab) that specifically reacts with the (162) SLAYGLR(168) sequence, which is exposed by thrombin cleavage and is located adjacent to the RGD sequence, on renal crystal formation. Renal crystals induced by daily administration of glyoxylate over 9 days (from days 1 to 9) in a murine model were sporadically detected in the renal tubular cells at the corticomedullary junction, where thrombin-cleaved osteopontin expression was also coincidentally detected. On days 0, 3, 6, and 9, 35B6-Ab administration inhibited renal crystal formation and induced significant morphological changes in a dose-dependent manner (250, 500, and 1000 µg per mouse). Scanning electron microscopy showed that the crystals in 35B6-Ab-treated mice were aberrantly formed and their density was low; in contrast, the crystals in untreated mice that were not administered 35B6-Ab had a radial pattern of growth (rosette petal-like crystals), and their density was high. Microstructure analysis of renal tubular cells by transmission electron microscopy revealed that untreated mice showed collapsed mitochondria in the flattened cytoplasm of renal tubular cells, unlike the corresponding structures in 35B6-Ab-treated mice, in which renal tubular cell injury was inhibited. In vitro, 35B6-Ab was found to inhibit the attachment of (14) C-labeled crystals to renal tubular culture cells and reduce morphological damage to these cells. We conclude that thrombin-cleaved osteopontin plays an important role in formation of renal calcium crystals and that 35B6-Ab contributes to the remarkable inhibition of early-stage renal crystal formation by preventing renal tubular cell injury and crystal-cell attachment.
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Affiliation(s)
- Shuzo Hamamoto
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan
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Khan A, Bashir S, Khan SR, Gilani AH. Antiurolithic activity of Origanum vulgare is mediated through multiple pathways. Altern Ther Health Med 2011; 11:96. [PMID: 22004514 PMCID: PMC3222619 DOI: 10.1186/1472-6882-11-96] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2011] [Accepted: 10/17/2011] [Indexed: 11/17/2022]
Abstract
Background Origanum vulgare Linn has traditionally been used in the treatment of urolithiasis. Therefore, we investigated the crude extract of Origanum vulgare for possible antiurolithic effect, to rationalize its medicinal use. Methods The crude aqueous-methanolic extract of Origanum vulgare (Ov.Cr) was studied using the in vitro and in vivo methods. In the in vitro experiments, supersaturated solution of calcium and oxalate, kidney epithelial cell lines (MDCK) and urinary bladder of rabbits were used, whereas, in the in vivo studies, rat model of urolithiasis was used for the study of preventive and curative effect. Results In the in vitro experiments, Ov.Cr exhibited a concentration-dependent (0.25-4 mg/ml) inhibitory effect on the slope of nucleation and aggregation and also decreased the number of calcium oxalate monohydrate crystals (COM) produced in calcium oxalate metastable solutions. It also showed concentration-dependent antioxidant effect against DPPH free radical and lipid peroxidation induced in rat kidney tissue homogenate. Ov.Cr reduced the cell toxicity using MTT assay and LDH release in renal epithelial cells (MDCK) exposed to oxalate (0.5 mM) and COM (66 μg/cm2) crystals. Ov.Cr relaxed high K+ (80 mM) induced contraction in rabbit urinary bladder strips, and shifted the calcium concentration-response curves (CRCs) towards right with suppression of the maximum response similar to that of verapamil, a standard calcium channel blocker. In male Wistar rats receiving lithogenic treatment comprising of 0.75% ethylene glycol in drinking water given for 3 weeks along with ammonium chloride (NH4Cl) for the first 5 days, Ov.Cr treatment (10-30 mg/kg) prevented as well as reversed toxic changes including loss of body weight, polyurea, crystalluria, oxaluria, raised serum urea and creatinine levels and crystal deposition in kidneys compared to their respective controls. Conclusion These data indicating the antiurolithic activity in Ov.Cr, possibly mediated through inhibition of CaOx crystallization, antioxidant, renal epithelial cell protective and antispasmodic activities, rationalizes its medicinal use in urolithiasis.
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Selective Rac1 inhibition protects renal tubular epithelial cells from oxalate-induced NADPH oxidase-mediated oxidative cell injury. ACTA ACUST UNITED AC 2011; 40:415-23. [PMID: 21814770 DOI: 10.1007/s00240-011-0405-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Accepted: 07/14/2011] [Indexed: 10/17/2022]
Abstract
Oxalate-induced oxidative cell injury is one of the major mechanisms implicated in calcium oxalate nucleation, aggregation and growth of kidney stones. We previously demonstrated that oxalate-induced NADPH oxidase-derived free radicals play a significant role in renal injury. Since NADPH oxidase activation requires several regulatory proteins, the primary goal of this study was to characterize the role of Rac GTPase in oxalate-induced NADPH oxidase-mediated oxidative injury in renal epithelial cells. Our results show that oxalate significantly increased membrane translocation of Rac1 and NADPH oxidase activity of renal epithelial cells in a time-dependent manner. We found that NSC23766, a selective inhibitor of Rac1, blocked oxalate-induced membrane translocation of Rac1 and NADPH oxidase activity. In the absence of Rac1 inhibitor, oxalate exposure significantly increased hydrogen peroxide formation and LDH release in renal epithelial cells. In contrast, Rac1 inhibitor pretreatment, significantly decreased oxalate-induced hydrogen peroxide production and LDH release. Furthermore, PKC α and δ inhibitor, oxalate exposure did not increase Rac1 protein translocation, suggesting that PKC resides upstream from Rac1 in the pathway that regulates NADPH oxidase. In conclusion, our data demonstrate for the first time that Rac1-dependent activation of NADPH oxidase might be a crucial mechanism responsible for oxalate-induced oxidative renal cell injury. These findings suggest that Rac1 signaling plays a key role in oxalate-induced renal injury, and may serve as a potential therapeutic target to prevent calcium oxalate crystal deposition in stone formers and reduce recurrence.
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Yu SL, Gan XG, Huang JM, Cao Y, Wang YQ, Pan SH, Ma LY, Teng YQ, An RH. Oxalate impairs aminophospholipid translocase activity in renal epithelial cells via oxidative stress: implications for calcium oxalate urolithiasis. J Urol 2011; 186:1114-20. [PMID: 21784463 DOI: 10.1016/j.juro.2011.04.106] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Indexed: 12/25/2022]
Abstract
PURPOSE We evaluated the possible involvement of phospholipid transporters and reactive oxygen species in the oxalate induced redistribution of renal epithelial cell phosphatidylserine. MATERIALS AND METHODS Madin-Darby canine kidney cells were labeled with the fluorescent phospholipid NBD-PS in the inner or outer leaflet of the plasma membrane and then exposed to oxalate in the presence or absence of antioxidant. This probe was tracked using a fluorescent quenching assay to assess the bidirectional transmembrane movement of phosphatidylserine. Surface expressed phosphatidylserine was detected by annexin V binding assay. The cell permeable fluorogenic probe DCFH-DA was used to measure the intracellular reactive oxygen species level. RESULTS Oxalate produced a time and concentration dependent increase in phosphatidylserine, which may have resulted from impaired aminophospholipid translocase mediated, inward directed phosphatidylserine transport and from enhanced phosphatidylserine outward transport. Adding the antioxidant N-acetyl-L-cysteine significantly attenuated phosphatidylserine externalization by effectively rescuing aminophospholipid translocase activity. CONCLUSIONS To our knowledge our findings are the first to show that oxalate induced increased reactive oxygen species generation impairs aminophospholipid translocase activity and decreased aminophospholipid translocase activity has a role in hyperoxaluria promoted calcium oxalate urolithiasis by facilitating phosphatidylserine redistribution in renal epithelial cells.
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Affiliation(s)
- Shi-Liang Yu
- Department of Urology, First Affiliated Hospital of Harbin Medical University, and Tumor Prevention and Cure Research Laboratory, Harbin Medical University, Harbin, People's Republic of China
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Tanriverdi O, Telci D, Aydin M, Ekici ID, Miroglu C, Sarıca K. Hyperoxaluria-induced tubular ischemia: the effects of verapamil and vitamin E on apoptotic changes with an emphasis on renal papilla in rat model. ACTA ACUST UNITED AC 2011; 40:17-25. [PMID: 21607878 DOI: 10.1007/s00240-011-0388-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2011] [Accepted: 04/26/2011] [Indexed: 11/29/2022]
Abstract
An experimental study in rats was performed to evaluate the presence and the degree of both tubular apoptotic changes and crystallization at cortical, medullar and papillary regions of the kidney during hyperoxaluric phase and assess the possible protective effects of vitamin E and verapamil on these pathologic changes (particularly in papillary part of the affected kidneys). A total of 32 rats have been included into the study program. Hyperoxaluria was induced by continuous administration of ethylene glycol (0.75%). In addition to hyperoxaluria induction, animals in Groups 2 and 3 did receive a calcium channel-blocking agent (verapamil) and vitamin E, respectively. Histologic alterations of the kidneys including crystal formation together with apoptotic changes were evaluated on days 1, 14 and 28, respectively. Both apoptotic changes and the presence and degree of crystallization were assessed separately in renal cortical region, medulla and particularly papillary parts of the removed kidneys. Although verapamil did well limit the degree of crystal formation and apoptosis and brought it to the same levels observed in control group animals in all parts of the kidneys during intermediate phase, addition of vitamin E was failed to show the same protective effect during both intermediate and late phase evaluations. As demonstrated in our study, the limitation of both crystal deposition and apoptotic changes might be instituted by calcium channel-blocking agents. Clinical application of such agents in the prophylaxis of stone disease might limit the formation of urinary calculi, especially in recurrent stone formers.
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Affiliation(s)
- Orhan Tanriverdi
- The Second Urology Department, Sisli Etfal Training and Research Hospital, 2. Uroloji Klinigi, Istanbul 34360, Turkey.
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Saito J, Matsuzawa Y, Ito H, Omura M, Ito Y, Yoshimura K, Yajima Y, Kino T, Nishikawa T. The alkalizer citrate reduces serum uric Acid levels and improves renal function in hyperuricemic patients treated with the xanthine oxidase inhibitor allopurinol. Endocr Res 2010; 35:145-54. [PMID: 20958145 PMCID: PMC3413920 DOI: 10.3109/07435800.2010.497178] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Hyperuricemia, an integral component of metabolic syndrome, is a major health problem causing gout and renal damage. Urine alkalizers such as citrate preparations facilitate renal excretion of the uric acid, but its supportive effect on xanthine oxidase inhibitors has not been tested yet. We performed a randomized, prospective study of the effect of a combination of allopurinol and a citrate preparation on renal function in patients with hyperuricemia, employing 70 patients who had hyperuricemia with serum uric acid levels ≥7.0 mg/dL, or those diagnosed as having hyperuricemia in the past. METHODS They were randomly enrolled into two study groups: the allopurinol monotherapy (MT) group or combination treatment (CT) group with allopurinol and a citrate preparation. Allopurinol (100-200 mg/day) in the absence or presence of a citrate preparation (3 g/day) was administered for 12 weeks and levels of serum uric acid, its urinary clearance (Cua), and the renal glomerular filtration rates assessed with the creatinine clearance (Ccr) were evaluated before and after the treatment. RESULTS Serum levels of uric acid decreased significantly in both groups, whereas the change observed was much greater in CT group. Cua was significantly increased in CT group but not in MT group. Ccr was not altered in both groups in general, whereas it was significantly increased in a fraction of CT group with decreased renal function. CONCLUSIONS These results indicate that an additional use of citrate preparations with xanthine oxidase inhibitors is beneficial for patients with hyperuricemia, reducing circulating uric acid and improving their glomerular filtration rates.
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Affiliation(s)
- Jun Saito
- Division of Endocrinology and Metabolism, Department of Medicine, Yokohama Rosai Hospital, Yokohama, Japan.
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Hirose M, Yasui T, Okada A, Hamamoto S, Shimizu H, Itoh Y, Tozawa K, Kohri K. Renal tubular epithelial cell injury and oxidative stress induce calcium oxalate crystal formation in mouse kidney. Int J Urol 2009; 17:83-92. [PMID: 19919640 DOI: 10.1111/j.1442-2042.2009.02410.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVES To clarify the role of renal tubular cell (RTC) injury and oxidative stress in the early stage of renal calcium oxalate crystal formation in a mouse model. METHODS Daily intra-abdominal injections of glyoxylate (1.35 mmol/kg/day) into 8-week-old mice were carried out over 6 days. Kidneys were extracted before and at 6, 12 and 24 h and 3 and 6 days after glyoxylate injection. Crystal formation was detected using Pizzolato staining and polarized light optical microscopy. Immunohistochemical staining and western blotting of superoxide dismutase, and 4-hydroxynonenal and malondialdehyde were carried out in order to observe oxidative stress and lipid peroxidation, respectively. RTC microstructural damage and crystal nuclei formation were observed using transmission electron microscopy. To ameliorate RTC injury, mice were treated with green tea 1 week before and 1 week after glyoxylate administration. The number of crystals and RTC damage were observed and comparisons were made between glyoxylate-treated mice with and without green tea administration. RESULTS Oxidative stress and lipid peroxidation were observed after 6 h. Crystal nuclei containing collapsed mitochondria and fallen microvilli appeared in the renal distal tubular lumen after 24 h. Crystals occupying the tubular lumen were detected on day 3. The number of crystals in mice receiving green tea was significantly lower than in those receiving glyoxylate alone. CONCLUSIONS RTC injury, especially mitochondrial damage, and oxidative stress induce the early stage of calcium oxalate crystal formation in mice.
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Affiliation(s)
- Masahito Hirose
- Department of Nephro-urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi, Japan
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Thamilselvan V, Menon M, Thamilselvan S. Oxalate-induced activation of PKC-alpha and -delta regulates NADPH oxidase-mediated oxidative injury in renal tubular epithelial cells. Am J Physiol Renal Physiol 2009; 297:F1399-410. [PMID: 19692488 DOI: 10.1152/ajprenal.00051.2009] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Oxalate-induced oxidative stress contributes to cell injury and promotes renal deposition of calcium oxalate crystals. However, we do not know how oxalate stimulates reactive oxygen species (ROS) in renal tubular epithelial cells. We investigated the signaling mechanism of oxalate-induced ROS formation in these cells and found that oxalate significantly increased membrane-associated protein kinase C (PKC) activity while at the same time lowering cytosolic PKC activity. Oxalate markedly translocated PKC-alpha and -delta from the cytosol to the cell membrane. Pretreatment of LLC-PK1 cells with specific inhibitors of PKC-alpha or -delta significantly blocked oxalate-induced generation of superoxide and hydrogen peroxide along with NADPH oxidase activity, LDH release, lipid hydroperoxide formation, and apoptosis. The PKC activator PMA mimicked oxalate's effect on oxidative stress in LLC-PK1 cells as well as cytosol-to-membrane translocation of PKC-alpha and -delta. Silencing of PKC-alpha expression by PKC-alpha-specific small interfering RNA significantly attenuated oxalate-induced cell injury by decreasing hydrogen peroxide generation and LDH release. We believe this is the first demonstration that PKC-alpha- and -delta-dependent activation of NADPH oxidase is one of the mechanisms responsible for oxalate-induced oxidative injury in renal tubular epithelial cells. The study suggests that the therapeutic approach might be considered toward attenuating oxalate-induced PKC signaling-mediated oxidative injury in recurrent stone formers.
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Garofalo AS, Borges FT, Dalboni MA, Pavão dos Santos OF. Reactive Oxygen Species Independent Cytotoxicity Induced by Radiocontrast Agents in Tubular Cells (LLC-PK1 and MDCK). Ren Fail 2009; 29:121-31. [PMID: 17365925 DOI: 10.1080/08860220601095892] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
PURPOSE Radiocontrast agents (RAs) cause renal tubular damage by hemodynamic imbalance, which could cause hypoxic stimulus and direct cytotoxicity. However, reactive oxygen species (ROS) could be an important factor in RAs' direct cytotoxicity. This study investigated the involvement of ROS in deleterious effects produced by RAs on normoxic and hypoxic renal tubular cells. MATERIALS AND METHODS LLC-PK1 and MDCK were exposed to diatrizoate and ioxaglate in normoxic and hypoxic conditions. Apoptotic and necrotic cell death were assessed by acridine orange/ethidium bromide and annexin V methods. Hydrogen peroxide, superoxide anion, and malondialdehyde levels were analyzed by, respectively, 2',7'-dichlorofluorescein, luminal, and thiobarbituric acid. Antioxidant agents were used to prevent cellular RAs damage. RESULTS Diatrizoate and ioxaglate decreased cellular viability in both cells, and this effect was enhanced by hypoxic conditions. Diatrizoate induced more injury than ioxaglate to both cell lines. LLC-PK1 underwent necrosis, while MDCK cells underwent apoptosis when exposed to diatrizoate. These results could not be attributed to an increase in osmolality. RAs did not increase hydrogen peroxide, superoxide anion or malondialdehyde levels in both cells. Additionally, N-acetyl-L-cysteine (NAC), ascorbic acid, alpha-tocopherol, glutathione, beta-carotene, allopurinol, cimetidine, and citric acid did not protect cells against RAs damage. Surprising, NAC increased the cellular damage induced by ioxaglate in the both cell lines. CONCLUSION The present study shows that RAs induce damage in cultured tubular cells, especially in hypoxic conditions. ROS were not involved in the observed RAs' cytotoxicity, and NAC increased ioxaglate-induced tubular damage.
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Affiliation(s)
- Andrezza Sanches Garofalo
- Nephrology Division, Medicine Department, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
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Piskac-Collier AL, Smith MA. Lindane-induced generation of reactive oxygen species and depletion of glutathione do not result in necrosis in renal distal tubule cells. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2009; 72:1160-1167. [PMID: 20077184 DOI: 10.1080/15287390903091780] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Lindane is a chlorinated hydrocarbon pesticide, currently used in prescription shampoos and lotions to treat scabies and lice infestations. Lindane is known to be nephrotoxic; however, the mechanism of action is not well understood. In other organ systems, lindane produces cellular damage by generation of free radicals and oxidative stress. Morphological changes were observed in lindane-treated Madin-Darby canine kidney (MDCK) cells indicative of apoptosis. Lindane treatment induced time-dependent reactive oxygen species (ROS) generation. Onset of ROS generation correlated with an initial increase in total glutathione (GSH) levels above control values, with a subsequent decline in a time-dependent manner. This decline may be attributed to quenching of free radicals by GSH, thereby decreasing the cellular stores of this antioxidant. Necrotic injury was assessed by measuring lactate dehydrogenase (LDH) leakage from the cell after lindane exposure. No significant LDH leakage was noted for all concentrations tested over time. Generation of ROS and alterations in cellular protective mechanisms did not result in necrotic injury in MDCK cells, which corresponds with our morphological findings of lindane-induced apoptotic changes as opposed to necrosis in MDCK cells. Thus, lindane exposure results in oxidative damage and alterations in antioxidant response in renal distal tubule cells, followed by cell death not attributed to necrotic injury.
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Affiliation(s)
- Amanda L Piskac-Collier
- Department of Epidemiology, University of Texas M. D. Anderson Cancer Center, Houston, Texas, USA.
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