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Lombardi G, Ferraro PM, Gambaro G. The Optimal Length of Pharmacological Prophylaxis in Calcium Kidney Stone Formers. KIDNEY360 2023; 4:e1318-e1321. [PMID: 37424064 PMCID: PMC10550000 DOI: 10.34067/kid.0000000000000203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 06/28/2023] [Indexed: 07/11/2023]
Affiliation(s)
- Gianmarco Lombardi
- Division of Nephrology, Department of Medicine, University of Verona, Verona, Italy
| | - Pietro Manuel Ferraro
- Università Cattolica del Sacro Cuore, Roma, Italia
- U.O.C. Nefrologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia
| | - Giovanni Gambaro
- Division of Nephrology, Department of Medicine, University of Verona, Verona, Italy
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Nephrolithiasis: A Red Flag for Cardiovascular Risk. J Clin Med 2022; 11:jcm11195512. [PMID: 36233380 PMCID: PMC9573143 DOI: 10.3390/jcm11195512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/13/2022] [Accepted: 09/16/2022] [Indexed: 02/05/2023] Open
Abstract
Epidemiological evidence shows that nephrolithiasis is associated with cardiovascular (CV) morbidities. The association between nephrolithiasis and CV disease is not surprising because both diseases share conditions that facilitate their development. Metabolic conditions, encompassed in the definition of metabolic syndrome (MS), and habits that promote nephrolithiasis by altering urine composition also promote clinical manifestations of CV disease. By inducing oxidative stress, these conditions cause endothelial dysfunction and increased arterial stiffness, which are both well-known predictors of CV disease. Furthermore, the subtle systemic metabolic acidosis observed in stone formers with CV disease may have a pathogenic role by increasing bone turnover and leading to reduced mineral content and osteoporosis/osteopenia. Heart valves and/or coronary artery and aortic calcifications are frequently associated with reduced mineral density. This is known as the 'calcification paradox' in osteoporosis and has also been observed in subjects with calcium nephrolithiasis. Evidence supports the hypothesis that osteoporosis/osteopenia is an independent risk factor for the development of CV calcifications. In the long term, episodes of renal stones may occur from the onset of metabolic derangements/MS to arterial stiffness/atherosclerosis and CV morbidities. These episodes should be considered a warning sign of an ongoing and silent atherosclerotic process. The evaluation of cardiometabolic risk factors and MS components should be routine in the assessment of renal stone formers. This would allow for treatment and prevention of the development of CV complications, which are much more severe for the patient and for public health.
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An YH, Kim J, Kim HJ, Lim K. Effects of leucine-enriched essential amino acid supplementation on muscular fatigue and inflammatory cytokines in wheelchair basketball players. Phys Act Nutr 2020; 24:38-46. [PMID: 32698260 PMCID: PMC7451841 DOI: 10.20463/pan.2020.0013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/26/2020] [Accepted: 06/26/2020] [Indexed: 11/22/2022] Open
Abstract
PURPOSE This study aimed to investigate the effects of leucine-enriched essential amino acid (LEAA) supplementation on muscle fatigue and the level of inflammatory cytokines in wheelchair basketball players after a basketball game and interval training. METHODS Of the ten recruited wheelchair basketball players (aged 34.5±8.9 years; lean body mass of 34.3±10.0 kg) who had spinal cord injury (SCI) and had undergone amputation, nine participated in the final test. These nine athletes received LEAA supplements (3 times 4.0 g/day) or placebo treatment in a double-blind, randomized, crossover study. We measured variables related to muscular fatigue and inflammatory response before the intense exercise and 4 days after recovery. RESULTS The significant effect of LEAA supplementation was inhibition of circulating IL-6 levels in the LEAA-treated group compared with the placebo group (P < .05). However, no changes were observed in the TNF-α and creatinine kinase levels. Moreover, analysis of variance analysis showed no significant difference in the relative values of muscle soreness. However, the effect size analysis with Cohen's d reported a significant improvement in the relative values of whole body and back muscle soreness. CONCLUSION Our results revealed that LEAA supplementation before and after intense exercise could help reduce muscle soreness and IL-6 levels in wheelchair basketball players.
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Affiliation(s)
- Young Hwan An
- Department of Physical Education, Konkuk University, SeoulRepublic of Korea
| | - Jisu Kim
- Department of Sports Medicine and Science in Graduate School, Konkuk University, SeoulRepublic of Korea
- Physical Activity and Performance Institute, Konkuk University, SeoulRepublic of Korea
| | - Hee-Jae Kim
- Physical Activity and Performance Institute, Konkuk University, SeoulRepublic of Korea
| | - Kiwon Lim
- Department of Physical Education, Konkuk University, SeoulRepublic of Korea
- Department of Sports Medicine and Science in Graduate School, Konkuk University, SeoulRepublic of Korea
- Physical Activity and Performance Institute, Konkuk University, SeoulRepublic of Korea
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Salcuni AS, Carnevale V, Battista C, Palmieri S, Eller-Vainicher C, Guarnieri V, Pugliese F, Guglielmi G, Desina G, Minisola S, Chiodini I, Scillitani A. Primary aldosteronism as a cause of secondary osteoporosis. Eur J Endocrinol 2017; 177:431-437. [PMID: 28794160 DOI: 10.1530/eje-17-0417] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 08/03/2017] [Accepted: 08/07/2017] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Patients with primary aldosteronism (PA) have a high prevalence of osteoporosis (OP) and fractures (Fx). We evaluated the presence of PA in patients admitted to our metabolic bone disease outpatient clinic. DESIGN Study conducted on an in- and outpatient basis in a referral Italian endocrinology unit. METHODS A total of 2632 patients were evaluated. 2310 were excluded because they were taking drugs known to affect bone or mineralocorticoids metabolism or were diagnosed to have a secondary cause of osteoporosis. The remaining 322 subjects (304 females, 18 males) took part in the study. Bone mineral density (BMD) and thoracic and lumbar spine vertebral morphometry were performed by dual X-ray absorptiometry. All patients were screened for PA with aldosterone-to-renin ratio. In those who had positive results, confirmatory tests were performed. RESULTS Among 322 subjects, 213 were osteoporotics and 109 were not. PA was diagnosed in eleven out of 213 osteoporotic patients (5.2%) and one out of 109 non-osteoporotic subjects (0.9%, P = 0.066). PA was observed in the 26.1% of patients with the concomitant presence of osteoporosis, hypertension and hypercalciuria. Compared with patients without PA, patients with PA had mean values of urinary calcium excretion, 4.8 ± 2.5 mmol/day vs 7.6 ± 3.2 mmol/day, P < 0.001 and serum PTH levels, 5.4 pmol/L vs 7.3 pmol/L, P < 0.01, significantly higher. CONCLUSIONS PA should be considered among the causes of secondary OP.
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Affiliation(s)
| | - Vincenzo Carnevale
- Internal Medicine Unit, 'Casa Sollievo della Sofferenza', IRCCS, San Giovanni Rotondo (FG), Italy
| | | | - Serena Palmieri
- Unit of Endocrinology and Metabolic Diseases, Fondazione IRCCS Cà Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | - Cristina Eller-Vainicher
- Unit of Endocrinology and Metabolic Diseases, Fondazione IRCCS Cà Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | | | | | | | - Gaetano Desina
- Clinical Pathology Unit, 'Casa Sollievo della Sofferenza', IRCCS, San Giovanni Rotondo (FG), Italy
| | - Salvatore Minisola
- Department of Internal Medicine and Medical Disciplines, 'Sapienza', Rome University, Rome, Italy
| | - Iacopo Chiodini
- Unit of Endocrinology and Metabolic Diseases, Fondazione IRCCS Cà Granda - Ospedale Maggiore Policlinico, Milan, Italy
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Lucato P, Trevisan C, Stubbs B, Zanforlini BM, Solmi M, Luchini C, Girotti G, Pizzato S, Manzato E, Sergi G, Giannini S, Fusaro M, Veronese N. Nephrolithiasis, bone mineral density, osteoporosis, and fractures: a systematic review and comparative meta-analysis. Osteoporos Int 2016; 27:3155-3164. [PMID: 27289533 DOI: 10.1007/s00198-016-3658-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/27/2016] [Indexed: 01/14/2023]
Abstract
UNLABELLED Our meta-analysis demonstrates that people with nephrolithiasis have decreased bone mineral density, an increased odds of osteoporosis, and potentially an elevated risk of fractures. INTRODUCTION People with nephrolithiasis might be at risk of reduced bone mineral density (BMD) and fractures, but the data is equivocal. We conducted a meta-analysis to investigate if patients with nephrolithiasis have worse bone health outcomes (BMD), osteoporosis, and fractures versus healthy controls (HCs). METHODS Two investigators searched major databases for articles reporting BMD (expressed as g/cm2 or a T- or Z-score), osteoporosis or fractures in a sample of people with nephrolithiasis, and HCs. Standardized mean differences (SMDs), 95 % confidence intervals (CIs) were calculated for BMD parameters; in addition odds (ORs) for case-control and adjusted hazard ratios (HRs) in longitudinal studies for categorical variables were calculated. RESULTS From 1816 initial hits, 28 studies were included. A meta-analysis of case-control studies including 1595 patients with nephrolithiasis (mean age 41.1 years) versus 3402 HCs (mean age 40.2 years) was conducted. Patients with nephrolithiasis showed significant lower T-scores values for the spine (seven studies; SMD = -0.69; 95 % CI = -0.86 to -0.52; I 2 = 0 %), total hip (seven studies; SMD = -0.82; 95 % CI = -1.11 to -0.52; I 2 = 72 %), and femoral neck (six studies; SMD = -0.67; 95 % CI = --1.00 to -0.34; I 2 = 69 %). A meta-analysis of the case-controlled studies suggests that people with nephrolithiasis are at increased risk of fractures (OR = 1.15, 95 % CI = 1.12-1.17, p < 0.0001, studies = 4), while the risk of fractures in two longitudinal studies demonstrated trend level significance (HR = 1.31, 95 % CI = 0.95-1.62). People with nephrolithiasis were four times more likely to have osteoporosis than HCs (OR = 4.12, p < 0.0001). CONCLUSIONS Nephrolithiasis is associated with lower BMD, an increased risk of osteoporosis, and possibly, fractures. Future screening/preventative interventions targeting bone health might be indicated.
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Affiliation(s)
- P Lucato
- Department of Medicine - DIMED, Geriatrics Division, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy
| | - C Trevisan
- Department of Medicine - DIMED, Geriatrics Division, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy
| | - B Stubbs
- Physiotherapy Department, South London and Maudsley NHS Foundation Trust, Denmark Hill, London, SE5 8AZ, UK
- Health Service and Population Research Department, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, De Crespigny Park, Box, SE5 8 AF, London, UK
| | - B M Zanforlini
- Department of Medicine - DIMED, Geriatrics Division, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy
| | - M Solmi
- Department of Neurosciences, University of Padova, Padova, Italy
- Institute of Clinical Research and Education in Medicine (IREM), Padova, Italy
| | - C Luchini
- Department of Pathology and Diagnostics, Verona University and Hospital Trust, Verona, Italy
- Azienda Provinciale per i Servizi Sanitari (APSS) Trento, Trento, Italy
| | - G Girotti
- Department of Medicine - DIMED, Geriatrics Division, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy
| | - S Pizzato
- Department of Medicine - DIMED, Geriatrics Division, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy
| | - E Manzato
- Department of Medicine - DIMED, Geriatrics Division, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy
- National Research Council, Aging Branch, Institute of Neuroscience, Padova, Italy
| | - G Sergi
- Department of Medicine - DIMED, Geriatrics Division, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy
| | - S Giannini
- Department of Medicine, Clinica Medica I, University of Padova, Padova, Italy
| | - M Fusaro
- National Research Council (CNR), Neuroscience Institute, Padova, Italy
| | - N Veronese
- Department of Medicine - DIMED, Geriatrics Division, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy.
- Institute of Clinical Research and Education in Medicine (IREM), Padova, Italy.
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Calcium nephrolithiasis and bone demineralization: pathophysiology, diagnosis, and medical management. Curr Opin Urol 2015; 24:633-8. [PMID: 25188231 DOI: 10.1097/mou.0000000000000111] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE OF REVIEW To establish the relationship between calcium nephrolithiasis, bone densitometry scoring, and bone mineral density (BMD) loss according to bone turnover markers (BTMs) and urinary metabolites. RECENT FINDINGS Patients with recurrent calcium nephrolithiasis and idiopathic fasting hypercalciuria (urinary calcium/creatinine ratio >0.11) are more likely to have BMD loss that may lead to osteopenia or osteoporosis. In these patients, BTMs may be used as a surrogate for both bone health and stone recurrence. Suspect higher lithogenic states when calcium stone formers have serum beta-crosslaps (resorptive marker) greater than 0.311 ng/ml, serum osteocalcin (formative marker) greater than 13.2 ng/ml, and beta-crosslaps/osteocalcin ratio greater than 0.024. SUMMARY Patients with recurrent calcium nephrolithiasis and fasting hypercalciuria have a higher incidence of osteopenia and osteoporosis, measured by the dual-energy X-ray absorptiometry. These patients present not only with hypercalciuria and increased BTMs (mainly resorptive), but also up to 30% have hypocitraturia and increased urinary calcium/citrate ratio (>0.25). On the basis of these results, a diagnostic algorithm was created, classifying hypercalciurics according to their fasting calcium/creatinine and calcium/citrate ratio. Medical therapy for these patients is aimed at improving the dietary habits (normocalcemic, low salt, low animal protein diet), prescribing combinations of potassium citrate, thiazides, and bisphosphonates, and correcting bone and urinary abnormalities that may lower future skeletal and kidney stone risk.
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Arrabal-Polo MA, Girón-Prieto MS, Cano-García MDC, Poyatos-Andujar A, Quesada-Charneco M, Abad-Menor F, Arias-Santiago S, Zuluaga-Gomez A, Arrabal-Martin M. Retrospective review of serum and urinary lithogenic risk factors in patients with osteoporosis and osteopenia. Urology 2015; 85:782-5. [PMID: 25817102 DOI: 10.1016/j.urology.2015.01.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 01/06/2015] [Accepted: 01/16/2015] [Indexed: 01/17/2023]
Abstract
OBJECTIVE To analyze differences in bone remodeling markers, lithogenic factors and bone densitometry among the 3 groups of patients (controls, patients with relapsing calcium renal lithiasis, and patients with loss of bone mineral density without lithiasis). MATERIAL AND METHODS This is a cross-sectional study including 203 patients who were divided in 3 groups: group 1 (controls), group 2 (patients with relapsing calcium renal lithiasis), and group 3 (patients with osteopenia and/or osteoporosis in the lumbar spine or hip). Bone densitometry, calcium-phosphorous and bone metabolism analysis, and analysis of lithogenic risk factors in fasting urine samples and 24-hour urine samples were performed. Statistical analysis was performed with SPSS 17.0. A P ≤.05 was considered statistically significant. RESULTS Patients in group 2 presented greater calcium excretion and a lower citrate excretion in 24-hour urine samples as compared with the other 2 groups. The proportion of hypercalciuria and hypocitraturia was higher in group 2. In addition, patients in group 2 presented a lower loss of bone mineral density as well as altered bone remodeling markers as compared with those in group 1. Patients in group 3 also presented alterations in urine calcium and citrate excretion with respect to the control group, with elevated fasting calcium and citrate levels and calcium-to-citrateratio. CONCLUSION Lithogenic risk factors are altered in patients with osteopenia and/or osteoporosis without renal lithiasis although to a lesser extent than patients with calcium renal lithiasis.
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Affiliation(s)
| | - María Sierra Girón-Prieto
- Centro de Salud de Atarfe, Spain; Programa de Doctorado de Medicina Clínica y Salud Pública, Universidad de Granada, Spain
| | | | | | | | - Felix Abad-Menor
- Servicio de Urología, Hospital Universitario San Cecilio, IBS Granada, Granada, Spain
| | | | - Armando Zuluaga-Gomez
- Servicio de Urología, Hospital Universitario San Cecilio, IBS Granada, Granada, Spain
| | - Miguel Arrabal-Martin
- Servicio de Urología, Hospital Universitario San Cecilio, IBS Granada, Granada, Spain
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Kim CS, Kim JY, Kim HJ. The effects of a single bout pilates exercise on mRNA expression of bone metabolic cytokines in osteopenia women. J Exerc Nutrition Biochem 2014; 18:69-78. [PMID: 25566441 PMCID: PMC4241937 DOI: 10.5717/jenb.2014.18.1.69] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 02/03/2014] [Accepted: 02/08/2014] [Indexed: 11/09/2022] Open
Abstract
[Purpose] The purpose of this study was to examine the effect of a single bout pilates exercise on mRNA expression of bone metabolic cytokines in elderly osteopenia women. [Methods] We selected 11 people of elderly osteopenia women and loaded a single bout pilates exercise about RPE 10-14 level. The blood samples were collected before, immediately after and 60 minute after pilates exercise, then examined calcium metabolic markers in serum and extracted peripheral blood mononuclear cell (PBMC) from whole blood and confirmed mRNA expression of bone metabolic cytokines from PBMC. To clarify the changes during exercise, we designed repeated measure ANOVA as the control group to perform blood sampling without exercise. [Results] As a result, serum P showed significant interaction effect between group and time (p<.001), the pilates exercise group decreased about 9% at immediately after exercise and 13% during recovery after exercise (p<.05), while the control group showed a tendency to increase. Serum CK also showed a significant interaction between group and time (p<.05), the pilates group significantly increased at immediately after exercise and during recovery after exercise (p<.05) but the control group didn’t have changes. TNF-α and IL-6 mRNA expression in PBMC was significantly increased in the pilates group (p<.01, p<.05), although INF-γ mRNA expression didn’t show statistically significant difference, it tended to increase in the pilates group (NS). [Conclusion] These results suggested that a single bout pilates exercise of elderly osteopenia women cause hypophosphatemia with temporary muscle damage, and it leading high turnover bone metabolic state with to activate both of bone formation and bone resorption.
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Affiliation(s)
- Chang Sun Kim
- Department of Physical Education, Dongduk Women's University, Seoul, Korea
| | - Ji Yeon Kim
- Department of Physical Education, Dongduk Women's University, Seoul, Korea
| | - Hyo Jin Kim
- Department of Physical Education, Dongduk Women's University, Seoul, Korea
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Arrabal-Polo MÁ, Sierra Girón-Prieto M, Orgaz-Molina J, Zuluaga-Gómez A, Arias-Santiago S, Arrabal-Martín M. Calcium renal lithiasis and bone mineral density. Importance of bone metabolism in urinary lithiasis. Actas Urol Esp 2013; 37:362-7. [PMID: 23411066 DOI: 10.1016/j.acuro.2012.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 10/25/2012] [Indexed: 12/14/2022]
Abstract
CONTEXT Calcium Nephrolithiasis is a multifactorial disease; in its pathophysiology is involved various minerals and metabolic factors that may be altered, including bone and phosphor-calcium metabolism. OBJECTIVE To establish the scientific evidence and demonstrate the relationship between calcium nephrolithiasis and bone mineral density loss, through the use of bone turnover markers, serum and urinary metabolites. EVIDENCE ACQUISITION We performed a PubMed literature review using different MeSH Terms like "Nephrolithiasis", "Bone mineral density", "Urinary stones", "Calcium", Bone resorption" and "Bone formation", with different combinations. We only selected articles with abstracts in English or Spanish and discarded clinical cases and articles with inappropriate statistical study. A total of 40 articles were selected. EVIDENCE SYNTHESIS In different studies reviewed have been observed that patients with hypercalciuria have a higher bone mineral density loss with respect to normocalciuric. Among patients with calcium stones (normocalciuric or hypercalciuric), there is loss of bone mineral density, being more evident in patients with stones and hypercalciuria. This mineral density loss is marked and important in patients with recurrent calcium stones. Increased markers like fasting calcium/creatinine and β-CrossLaps are determinant of nephrolithiasis and mineral density loss in these patients. CONCLUSION We recommend perform markers of bone turnover and fasting calcium/creatinine in patients with recurrent calcium stones by the significant presence of bone mineral density loss, with a level of evidence III.
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Affiliation(s)
- M Á Arrabal-Polo
- Servicio de Urología, Hospital Universitario San Cecilio, Granada, España.
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Salcuni AS, Palmieri S, Carnevale V, Morelli V, Battista C, Guarnieri V, Guglielmi G, Desina G, Eller-Vainicher C, Beck-Peccoz P, Scillitani A, Chiodini I. Bone involvement in aldosteronism. J Bone Miner Res 2012; 27:2217-22. [PMID: 22589146 DOI: 10.1002/jbmr.1660] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In rats with aldosteronism, a reduction of bone mineral density (BMD) and cortical bone strength has been reported. Our study was aimed to evaluate bone involvement in patients with primary aldosteronism (PA). A total of 188 consecutive subjects with adrenal incidentaloma, observed between November 2009 and October 2011, were screened for PA with aldosterone-to-renin ratio. After confirmatory tests, in those who screened positive, 11 patients were diagnosed as PA and 15 patients were not (nPA). A serum/urinary biochemical profile, parathyroid hormone (PTH), BMD measured at lumbar spine (LS) and total and femoral neck (TN and FN) by dual X-ray absorptiometry, and conventional spinal radiographs (T(4) -L(4) ) were obtained in all subjects. PA patients had a significantly higher 24-hour urinary calcium (6.28 ± 1.85 versus 4.28 ± 1.18 mmol/d; p < 0.01), and PTH (9.8 [5.8-14.6], median [range] versus 5.3 [2.5-10.8] pmol/L; p < 0.01) than nPA patients. BMD expressed as Z-value at LS (-1.18 ± 0.99 versus 0.22 ± 1.12), FN (-0.85 ± 0.73 versus 0.01 ± 0.82), and TN (-0.49 ± 0.61 versus 0.39 ± 0.93) was lower in PA than in nPA (p = 0.003, p = 0.011, and p = 0.012, respectively). The prevalence of osteoporosis was higher in PA than in nPA (8/11, 72.7% versus 3/15, 20.0%; Fisher's exact test: p = 0.015). Vertebral fractures tended to be more prevalent in PA than in nPA (5/11, 45.5% versus 2/15, 13.3%; Fisher's exact test: p = 0.095). Logistic regression analysis showed that osteoporosis and morphometric vertebral fractures were associated with PA (odds ratio [OR], 15.4; 95% confidence interval [CI] = 1.83-130, p = 0.012; and OR, 30.4; 95%CI, 1.07-862, p = 0.045, respectively) regardless of age, body mass index (BMI), and LS-BMD. In 9 of 11 PA patients, 6 months after beginning of treatment (surgery or spironolactone) there was a significant reduction of urinary calcium excretion (p < 0.01) and PTH (p < 0.01), whereas in 5 of 11 PA patients, 1 year after beginning of treatment, BMD was significantly increased at LS, p < 0.01). In conclusion, PA is associated with osteoporosis, vertebral fractures, and increased urinary calcium excretion.
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Plasma and urinary levels of cytokines in patients with idiopathic hypercalciuria. Pediatr Nephrol 2012; 27:941-8. [PMID: 22223141 DOI: 10.1007/s00467-011-2094-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2011] [Revised: 12/02/2011] [Accepted: 12/05/2011] [Indexed: 10/14/2022]
Abstract
BACKGROUND Recent studies suggest that cytokines modulate bone turnover. Idiopathic hypercalciuria (IH) seems to be associated with bone mineral loss. Therefore, the aim of this study was to assess cytokines involved in bone turnover in patients with IH. METHODS Plasma and spot-urine levels of interleukin (IL)-1β, IL-6, IL-8, tumor necrosis factor alpha (TNF-α), transforming growth factor β1 (TGF-β1), and monocyte chemoattractant protein (MCP-1) were measured in 70 children and adolescents with IH and in 37 healthy controls. Patients with IH were subdivided according to their calciuria at the time of sample collection: ≥4 mg/kg/day (persistent IH, n=27) and below 4 mg/kg/day (controlled IH, n=43). Cytokines were determined by enzyme-linked immunoassay. RESULTS Plasma and urinary concentrations of IL-1β, IL-6, IL-8, and TNF-α were undetectable in all groups. No differences were found between controlled and persistent hypercalciuria for plasma and urinary levels of MCP-1 and TGF-β1. On the other hand, MCP-1 levels were significantly higher in both subgroups of IH in comparison to healthy controls. Furthermore, urinary MCP-1 levels of IH patients correlated positively with bone mineral content (p=0.013). CONCLUSION Although cytokine measurements did not allow the differentiation between persistent and controlled IH, our findings suggest that MCP-1 might play a role in patients with IH.
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Moreira Guimarães Penido MG, de Sousa Tavares M. Bone disease in pediatric idiopathic hypercalciuria. World J Nephrol 2012; 1:54-62. [PMID: 24175242 PMCID: PMC3782196 DOI: 10.5527/wjn.v1.i2.54] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Revised: 11/11/2011] [Accepted: 02/10/2012] [Indexed: 02/06/2023] Open
Abstract
Idiopathic hypercalciuria (IH) is the leading metabolic risk factor for urolithiasis and affects all age groups without gender or race predominance. IH has a high morbidity with or without lithiasis and reduced bone mineral density (BMD), as described previously in pediatric patients as well as in adults. The pathogenesis of IH is complex and not completely understood, given that urinary excretion of calcium is the end result of an interplay between three organs (gut, bone and kidney), which is further orchestrated by hormones, such as 1,25 dihydroxyvitamin D, parathyroid hormone, calcitonin and fosfatonins (i.e., fibroblast growth-factor-23). Usually, a primary defect in one organ induces compensatory mechanisms in the remaining two organs, such as increased absorption of calcium in the gut secondary to a primary renal loss. Thus, IH is a systemic abnormality of calcium homeostasis with changes in cellular transport of this ion in intestines, kidneys and bones. Reduced BMD has been demonstrated in pediatric patients diagnosed with IH. However, the precise mechanisms of bone loss or failure of adequate bone mass gain are still unknown. The largest accumulation of bone mass occurs during childhood and adolescence, peaking at the end of the second decade of life. This accumulation should occur without interference to achieve the peak of optimal bone mass. Any interference may be a risk factor for the reduction of bone mass with increased risk of fractures in adulthood. This review will address the pathogenesis of IH and its consequence in bone mass.
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Affiliation(s)
- Maria Goretti Moreira Guimarães Penido
- Maria Goretti Moreira Guimarães Penido, Marcelo de Sousa Tavares, Department of Pediatrics, Pediatric Nephrology Unit, School of Medicine, Federal University of Minas Gerais, Belo Horizonte, Belo Horizonte, CEP 30130100, Minas Gerais, Brazil
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Abstract
GPRC6A is a widely expressed orphan G protein-coupled receptor that senses extracellular amino acids, osteocalcin, and divalent cations in vitro. GPRC6A null (GPRC6A(-/-)) mice exhibit multiple metabolic abnormalities including osteopenia. To investigate whether the osseous abnormalities are a direct function of GPRC6A in osteoblasts, we examined the function of primary osteoblasts and bone marrow stromal cell cultures (BMSCs) in GPRC6A(-/-) mice. We confirmed that GPRC6A(-/-) mice exhibited a decrease in bone mineral density (BMD) associated with reduced expression of osteocalcin, ALP, osteoprotegerin, and Runx2-II transcripts in bone. Osteoblasts and BMSCs derived from GPRC6A(-/-) mice exhibited an attenuated response to extracellular calcium-stimulated extracellular signal-related kinase (ERK) activation, diminished alkaline phosphatase (ALP) expression, and impaired mineralization ex vivo. In addition, siRNA-mediated knockdown of GPRC6A in MC3T3 osteoblasts also resulted in a reduction in extracellular calcium-stimulated ERK activity. To explore the potential relevance of GPRC6A function in humans, we looked for an association between GPRC6A gene polymorphisms and BMD in a sample of 1000 unrelated American Caucasians. We found that GPRC6A gene polymorphisms were significantly associated with human spine BMD. These data indicate that GRPC6A directly participates in the regulation of osteoblast-mediated bone mineralization and may mediate the anabolic effects of extracellular amino acids, osteocalcin, and divalent cations in bone.
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Pi M, Chen L, Huang MZ, Zhu W, Ringhofer B, Luo J, Christenson L, Li B, Zhang J, Jackson PD, Faber P, Brunden KR, Harrington JJ, Quarles LD. GPRC6A null mice exhibit osteopenia, feminization and metabolic syndrome. PLoS One 2008; 3:e3858. [PMID: 19050760 PMCID: PMC2585477 DOI: 10.1371/journal.pone.0003858] [Citation(s) in RCA: 181] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Accepted: 11/12/2008] [Indexed: 12/20/2022] Open
Abstract
Background GPRC6A is a widely expressed orphan G-protein coupled receptor that senses extracellular amino acids, osteocalcin and divalent cations in vitro. The physiological functions of GPRC6A are unknown. Methods/Principal Findings In this study, we created and characterized the phenotype of GPRC6A−/− mice. We observed complex metabolic abnormalities in GPRC6A−/− mice involving multiple organ systems that express GPRC6A, including bone, kidney, testes, and liver. GPRC6A−/− mice exhibited hepatic steatosis, hyperglycemia, glucose intolerance, and insulin resistance. In addition, we observed high expression of GPRC6A in Leydig cells in the testis. Ablation of GPRC6A resulted in feminization of male GPRC6A−/− mice in association with decreased lean body mass, increased fat mass, increased circulating levels of estradiol, and reduced levels of testosterone. GPRC6A was also highly expressed in kidney proximal and distal tubules, and GPRC6A−/− mice exhibited increments in urine Ca/Cr and PO4/Cr ratios as well as low molecular weight proteinuria. Finally, GPRC6A−/− mice exhibited a decrease in bone mineral density (BMD) in association with impaired mineralization of bone. Conclusions/Significance GPRC6A−/− mice have a metabolic syndrome characterized by defective osteoblast-mediated bone mineralization, abnormal renal handling of calcium and phosphorus, fatty liver, glucose intolerance and disordered steroidogenesis. These findings suggest the overall function of GPRC6A may be to coordinate the anabolic responses of multiple tissues through the sensing of extracellular amino acids, osteocalcin and divalent cations.
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Affiliation(s)
- Min Pi
- The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Ling Chen
- The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Min-Zhao Huang
- The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Wenyu Zhu
- The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Brian Ringhofer
- The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Junming Luo
- The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Lane Christenson
- Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Benyi Li
- Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Jianghong Zhang
- Center for Bone Biology, Clinical Pharmacology, Division/Medicine, Vanderbilt University, Nashville, Tennessee, United States of America
| | | | - Pieter Faber
- Athersys, Inc., Cleveland, Ohio, United States of America
| | | | | | - L. Darryl Quarles
- The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, United States of America
- * E-mail:
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Berkemeyer S, Bhargava A, Bhargava U. Urinary phosphorus rather than urinary calcium possibly increases renal stone formation in a sample of Asian Indian, male stone-formers. Br J Nutr 2007; 98:1224-8. [PMID: 17617937 DOI: 10.1017/s0007114507778686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The contribution of dietary Ca and P in renal stone formation is debated. Thus, the main objective was to investigate if there were any differences in the dietary, serum and urine values of Ca and P in stone formers (SF) compared with healthy controls (HC). The secondary aim was to analyse if dietary, serum and urine Ca and P correlated. The study enrolled ten patients with renal stones admitted for stone removal and ten healthy controls. Their dietary macronutrients, Ca and P intakes were calculated from 2-d dietary records. On the second day of dietary record 24-h urine was collected and on the third day morning a 5 ml blood sample was collected. Biochemical analyses were conducted for serum and urine Ca, P and uric acid with qualitative renal stone analysis. All the dietary intakes and urine P were significantly higher (P < 0·05) in SF than in HC. Correlation results showed that in SF dietary Ca correlated to serum and urine Ca. No such correlations were seen for P. Additionally, in SF urine Ca correlated to dietary proteins and fats but not to carbohydrates. None of the biochemical values lay outside the normal range of values. The study suggests urine P rather than urine Ca to be probably at work in the formation of renal stones. Limitation of protein intake with normal Ca intakes could provide a suitable measure to avoid renal stone formation.
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Abstract
PURPOSE OF REVIEW Decreased bone mineral density and increased prevalence of bone fractures have been found in patients with idiopathic hypercalciuria. The purpose of this review is to summarize the recent published evidence that supports a potential role of the bone, and its link to the kidney and intestine, in the pathogenesis of idiopathic hypercalciuria. The effects of hypercalciuria on bone and the implications for treatment are also reviewed. RECENT FINDINGS Evidence suggests that the incidence of a first fracture in kidney stone patients is fourfold higher than the control population. Support for the role of bone in the pathophysiology of hypercalciuria has been corroborated. New studies have detailed the effects of several cytokines - increased number and sensitivity of vitamin D receptors, and increased acid production - upon the bone acting cells. Similarly, recent clinical and experimental studies have suggested that genetic factors confer a predisposition to the formation of renal calcium stones and bone demineralization. SUMMARY Whether hypercalciuria is the result of a primary bone disorder, a consequence of a persisting negative calcium balance or a combination of both still remains to be determined. Nevertheless, bone status must be evaluated and followed up in patients with idiopathic hypercalciuria.
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Affiliation(s)
- Ita P Heilberg
- Division of Nephrology, Universidade Federal de São Paulo, São Paulo, Brazil
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Bibliography. Current world literature. Mineral metabolism. Curr Opin Nephrol Hypertens 2006; 15:464-7. [PMID: 16775463 DOI: 10.1097/01.mnh.0000232889.65895.ae] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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