Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 27
Filtrar
1.
Am J Kidney Dis ; 82(6): 706-714, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-37516301

RESUMEN

RATIONALE & OBJECTIVE: Although some evidence exists of increased dementia risk from anemia, it is unclear whether this association persists among adults with CKD. Anemia may be a key marker for dementia among adults with CKD, so we evaluated whether anemia is associated with an increased risk of dementia among adults with CKD. STUDY DESIGN: Retrospective cohort study. SETTING & PARTICIPANTS: The study included 620,095 veterans aged≥45 years with incident stage 3 CKD (estimated glomerular filtration rate [eGFR]<60mL/min/1.73m2) between January 2005 and December 2016 in the US Veterans Health Administration system and followed through December 31, 2018, for incident dementia, kidney failure, or death. EXPOSURE: Anemia was assessed based on the average of hemoglobin levels (g/L) during the 2 years before the date of incident CKD and categorized as normal, mild, or moderate/severe anemia (≥12.0, 11.0-11.9,<11.0g/dL, respectively, for women, and≥13.0, 11.0-12.9,<11.0g/dL for men). OUTCOME: Dementia and the composite outcome of kidney failure or death. ANALYTICAL APPROACH: Adjusted cause-specific hazard ratios were estimated for each outcome. RESULTS: At the time of incident CKD, the mean age of the participants was 72 years, 97% were male, and their mean eGFR was 51mL/min per 1.73m2. Over a median 4.1 years of follow-up, 92,306 veterans (15%) developed dementia before kidney failure or death. Compared with the veterans with CKD without anemia, the multivariable-adjusted models showed a 16% (95% CI, 14%-17%) significantly higher risk of dementia for those with mild anemia and a 27% (95% CI, 23%-31%) higher risk with moderate/severe anemia. Combined risk of kidney failure or death was higher at 39% (95% CI, 37%-40%) and 115% (95% CI, 112%-119%) for mild and moderate/severe anemia, respectively, compared with no anemia. LIMITATIONS: Residual confounding from the observational study design. Findings may not be generalizable to the broader US population. CONCLUSIONS: Anemia was significantly associated with an increased risk of dementia among veterans with incident CKD, underscoring the role of anemia as a predictor of dementia risk. PLAIN-LANGUAGE SUMMARY: Adults with chronic kidney disease (CKD) often have anemia. Prior studies among adults in the general population suggest anemia is a risk factor for dementia, though it is unclear whether this association persists among adults with CKD. In this large study of veterans in the United States, we studied the association between anemia and the risk of 2 important outcomes in this population: (1) dementia and (2) kidney failure or death. We found that anemia was associated with a greater risk of dementia as well as risk of kidney failure or death. The study findings therefore emphasize the role of anemia as a key predictor of dementia risk among adults with CKD.


Asunto(s)
Anemia , Demencia , Insuficiencia Renal Crónica , Insuficiencia Renal , Veteranos , Adulto , Humanos , Masculino , Femenino , Estados Unidos/epidemiología , Anciano , Estudios Retrospectivos , Estudios de Cohortes , Insuficiencia Renal Crónica/complicaciones , Insuficiencia Renal Crónica/epidemiología , Tasa de Filtración Glomerular , Factores de Riesgo , Anemia/epidemiología , Anemia/complicaciones , Insuficiencia Renal/complicaciones , Demencia/epidemiología
2.
PeerJ ; 11: e14879, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36874959

RESUMEN

Background: Chronic kidney disease (CKD) poses a major public health burden. Diabetes mellitus (DM) is one of the major causes of CKD. In patients with DM, it can be difficult to differentiate diabetic kidney disease (DKD) from other causes of glomerular damage; it should not be assumed that all DM patients with decreased eGFR and/or proteinuria have DKD. Renal biopsy is the standard for definitive diagnosis, but other less invasive methods may provide clinical benefit. As previously reported, Raman spectroscopy of CKD patient urine with statistical and chemometric modeling may provide a novel, non-invasive methodology for discriminating between renal pathologies. Methods: Urine samples were collected from renal biopsied and non-biopsied patients presenting with CKD secondary to DM and non-diabetic kidney disease. Samples were analyzed by Raman spectroscopy, baselined with the ISREA algorithm, and subjected to chemometric modeling. Leave-one-out cross-validation was used to assess the predictive capabilities of the model. Results: This proof-of-concept study consisted of 263 samples, including renal biopsied, non-biopsied diabetic and non-diabetic CKD patients, healthy volunteers, and the Surine™ urinalysis control. Urine samples of DKD patients and those with immune-mediated nephropathy (IMN) were distinguished from one another with 82% sensitivity, specificity, positive-predictive value (PPV), and negative-predictive value (NPV). Among urine samples from all biopsied CKD patients, renal neoplasia was identified in urine with 100% sensitivity, specificity, PPV, and NPV, and membranous nephropathy was identified with 66.7% sensitivity, 96.4% specificity, 80.0% PPV, and 93.1% NPV. Finally, DKD was identified among a population of 150 patient urine samples containing biopsy-confirmed DKD, other biopsy-confirmed glomerular pathologies, un-biopsied non-diabetic CKD patients (no DKD), healthy volunteers, and Surine™ with 36.4% sensitivity, 97.8% specificity, 57.1% PPV, and 95.1% NPV. The model was used to screen un-biopsied diabetic CKD patients and identified DKD in more than 8% of this population. IMN in diabetic patients was identified among a similarly sized and diverse population with 83.3% sensitivity, 97.7% specificity, 62.5% PPV, and 99.2% NPV. Finally, IMN in non-diabetic patients was identified with 50.0% sensitivity, 99.4% specificity, 75.0% PPV, and 98.3% NPV. Conclusions: Raman spectroscopy of urine with chemometric analysis may be able to differentiate between DKD, IMN, and other glomerular diseases. Future work will further characterize CKD stages and glomerular pathology, while assessing and controlling for differences in factors such as comorbidities, disease severity, and other lab parameters.


Asunto(s)
Líquidos Corporales , Diabetes Mellitus , Nefropatías Diabéticas , Insuficiencia Renal Crónica , Humanos , Riñón , Glomérulos Renales
3.
Am J Nephrol ; 53(8-9): 652-662, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36209732

RESUMEN

INTRODUCTION: Mortality is an important long-term indicator of the public health impact of chronic kidney disease (CKD). We investigated the role of individual comorbidities and multimorbidity on age-specific mortality risk among US veterans with new-onset CKD. METHODS: The cohort included 892,005 veterans aged ≥18 years with incident CKD stage 3 between January 2004 and April 2018 in the US Veterans Health Administration (VHA) system and followed until death, December 2018, or up to 10 years. Incident CKD was defined as the first-time estimated glomerular filtration rate (eGFR) was <60 mL/min/1.73 m2 for >3 months. Comorbidities were ascertained using inpatient and outpatient clinical records in the VHA system and Medicare claims. We estimated death rates for any cardiovascular disease (CVD, a composite of 6 CVD conditions) and 15 non-CVD comorbidities, and adjusted risks of death (hazard ratio [HR], 95% confidence interval [CI]) overall and by age group at CKD incidence. RESULTS: At CKD incidence, the mean age was 72 years, and 97% were male; the mean eGFR was 52 mL/min/1.73 m2, and 95% had ≥2 comorbidities (median, 4) in addition to CKD. During a median follow-up of 4.5 years, among the 16 comorbidities, CVD was associated with the highest relative risk of death in younger veterans (HR 1.96 [95% CI: 1.61-2.37] in ages 18-44 years and HR 1.66 [1.63-1.70] in ages 45-64 years). Dementia was associated with the highest relative risk of death among older veterans (HR 1.71 [1.68-1.74] in ages 65-84 years and HR 1.69 [1.65-1.73] in ages 85-100 years). The additive effect of multimorbidity on risk of death was stronger in younger than older veterans. Compared to having 1 or no comorbidity at CKD onset, the risk of death with ≥5 comorbidities was >7-fold higher among veterans aged 18-44 years and >2-fold higher among veterans aged 85-100 years. CONCLUSION: The large burden of comorbidities in US veterans with newly identified CKD places them at the risk of premature death. Compared with older veterans, younger veterans with multiple comorbidities, particularly with CVD, at CKD onset are at an even higher relative risk of death.


Asunto(s)
Enfermedades Cardiovasculares , Insuficiencia Renal Crónica , Veteranos , Anciano , Masculino , Humanos , Estados Unidos/epidemiología , Adolescente , Adulto , Femenino , Multimorbilidad , Medicare , Insuficiencia Renal Crónica/epidemiología , Tasa de Filtración Glomerular , Enfermedades Cardiovasculares/epidemiología , Factores de Riesgo
4.
Kidney360 ; 2(11): 1716-1727, 2021 Nov 25.
Artículo en Inglés | MEDLINE | ID: mdl-34913041

RESUMEN

BACKGROUND: AKI requiring dialysis (AKI-D) is associated with prolonged hospitalization, mortality, and progressive CKD among survivors. Previous studies have examined only select urine or serum biomarkers for predicting kidney recovery from AKI. METHODS: Serum samples collected on day 8 of randomized RRT from 72 patients enrolled in the Veteran's Affairs/National Institutes of Health Acute Renal Failure Trial Network study were analyzed by the SOMAscan proteomic platform to profile 1305 proteins in each sample. Of these patients, 38 recovered kidney function and dialysis was discontinued, whereas another 34 patients remained on dialysis by day 28. RESULTS: Differential serum levels of 119 proteins, with 53 higher and 66 lower, were detected in samples from patients who discontinued dialysis, compared with patients who remained on dialysis by day 28. Patients were classified into tertiles on the basis of SOMAscan protein measurements for the 25 proteins most differentially expressed. The association of serum levels of each protein with kidney recovery was further evaluated using logistic regression analysis. Higher serum levels of CXCL11, CXCL2/CXCL3, CD86, Wnt-7a, BTK, c-Myc, TIMP-3, CCL5, ghrelin, PDGF-C, survivin, CA2, IL-9, EGF, and neuregulin-1, and lower levels of soluble CXCL16, IL1RL1, stanniocalcin-1, IL-6, and FGF23 when classified in tertiles were significantly associated with better kidney recovery. This significant association persisted for each of these proteins after adjusting for potential confounding risk factors including age, sex, cardiovascular SOFA score, congestive heart failure, diabetes, modality of intensive dialysis treatment, cause of AKI, baseline serum creatinine, day 8 urine volume, and estimated 60-day mortality risk. CONCLUSIONS: These results suggest concerted changes between survival-related proteins and immune-regulatory chemokines in regulating angiogenesis, endothelial and epithelial remodeling, and kidney cell regeneration, illustrating potential mechanisms of kidney recovery. Thus, this study identifies potential novel predictive biomarkers of kidney recovery in patients with AKI-D.


Asunto(s)
Lesión Renal Aguda , Proteómica , Lesión Renal Aguda/diagnóstico , Biomarcadores/orina , Humanos , Riñón/metabolismo , Diálisis Renal/métodos
5.
Artículo en Inglés | MEDLINE | ID: mdl-34815179

RESUMEN

Acute kidney injury (AKI) requiring renal replacement therapy (RRT) is associated with increased incidence of dialysis dependence and portends high mortality in critically ill patients. At the early stage of RRT, serum metabolic biomarkers might differntiate patients with a high risk of mortality or permanent kidney injury from those who can recover. Serum samples from participants enrolled in the Veteran's Affairs/National Institutes of Health Acute Renal Failure Trial Network study were collected on day 1 (n = 97) and day 8 (n = 105) of randomized RRT. The samples were further evaluated using LC/MS-based metabolic profiling. A model predicting mortality by day 8 was built from samples collected on day 1 and based on four metabolites with an area under the curve (AUC) of 0.641. A model most predictive of mortality by day 28 was built from the levels of 11 serum metabolites from day 8 with an AUC of 0.789. Both day 1 and day 8 samples had lower serum levels of 1-arachidonoyl-lysoPC and 1-eicosatetraenoyl-lysoPC (involved in anti-inflammatory processes) in the critically ill patients who died by day 8 or day 28. Higher levels of amino acids and amino acid metabolites in the day 8 model predicting < day 28 mortality may be indicative of muscle wasting. A kidney recovery biomarker panel based on the serum levels of three metabolites from day 8 samples with an AUC of 0.70 was devised. Serum metabolic profiling of AKI critically ill patients requiring RRT revealed predictive models of mortality based on observed differences in four serum metabolites at day 1 and 11 metabolites at day 8 which were predictive of mortality. Significant changes in the levels of these metabolites suggest links to inflammatory processes and/or muscle wasting.


Asunto(s)
Lesión Renal Aguda , Metaboloma/fisiología , Terapia de Reemplazo Renal , Lesión Renal Aguda/sangre , Lesión Renal Aguda/metabolismo , Lesión Renal Aguda/mortalidad , Lesión Renal Aguda/terapia , Adulto , Anciano , Biomarcadores/sangre , Biomarcadores/metabolismo , Estudios de Cohortes , Enfermedad Crítica , Femenino , Humanos , Masculino , Metabolómica , Persona de Mediana Edad , Modelos Estadísticos
6.
Semin Nephrol ; 41(4): 371-379, 2021 07.
Artículo en Inglés | MEDLINE | ID: mdl-34715966

RESUMEN

Increasing population obesity and associated metabolic consequences has led to increased number of obese patients with chronic kidney disease and end-stage renal disease. While obesity is associated with increased cardiovascular morbidity and mortality, obese dialysis patients present a seeming paradox for survival benefit, given other acute intervening illnesses for those on dialysis with loss of lean body mass overtime. Challenges remain in providing adequate renal replacement options and therapy for this growing segment of obese patients on dialysis which are discussed in this article.


Asunto(s)
Epidemias , Fallo Renal Crónico , Índice de Masa Corporal , Humanos , Fallo Renal Crónico/complicaciones , Fallo Renal Crónico/epidemiología , Fallo Renal Crónico/terapia , Obesidad/complicaciones , Obesidad/epidemiología , Diálisis Renal
7.
South Med J ; 113(8): 401-406, 2020 08.
Artículo en Inglés | MEDLINE | ID: mdl-32747970

RESUMEN

OBJECTIVES: To assess the relation between renal function and delirium and to assess and compare the relation between cerebral white matter lesion (WML) and renal function as estimated by three formulas for the estimated glomerular filtration rate (eGFR) in older adult hospitalized veterans with and without delirium. METHODS: Commonly used formulas to assess renal function-the four-variable Modification of Diet in Renal Disease (MDRD), the six-variable MDRD, and the Cockcroft-Gault eGFR equations-were used to assess renal function in 100 older adult hospitalized veterans with delirium (delirium group) and 100 hospitalized veterans without delirium (nondelirium group) that were age, sex, and race matched. WML location and volumes were assessed using brain computed tomography imaging for each of the 200 veterans in the study. One radiologist, blinded to the diagnoses of the veterans, examined head computed tomography scans for WML in the cortex, subcortex (frontal, temporal, parietal, occipital lobes), basal ganglia (globus pallidus, caudate, putamen), and internal capsule. WML were graded as not present, <1 cm, 1 to 2 cm, or >2 cm. Exploratory χ2 analyses were used to determine the association between the stage of chronic kidney disease and WML. Simple logistic regression analyses were then used to estimate the strength of association between the stages of kidney disease and WML for particular regions of the brain. RESULTS: The mean age of delirium group and nondelirium group veterans was 66 years. χ2 tests revealed no reliable relation between stages of renal disease and delirium. χ2 exploratory analyses of WML in brain regions by renal disease stages demonstrated significant differences in associations among the MDRD-4, MDRD-6, and Cockcroft-Gault formulas for measuring eGFR. The MDRD-4 formula was least associated with the presence or absence of WML. The Cockcroft-Gault estimation of eGFR was most associated with the presence or absence of WML. Simple logistic regressions showed notable increases in the association between stages of renal failure and WMLs in specific areas of the brain, with the MDRD-4 being the least associative with the fewest specific areas and the Cockcroft-Gault formula being the most associative with the most specific areas. CONCLUSIONS: The association between stages 2 through 5 of chronic kidney disease and WLM support the role of kidney function as a potential risk factor for WML in older adult military veterans. The Cockcroft-Gault formula is an important renal index of suspected WML and renal stages 2 through 5, superior to the MDRD-6 and MDRD-4, respectively, in association with WML in older adult military veterans.


Asunto(s)
Trastornos Cerebrovasculares/fisiopatología , Delirio/fisiopatología , Tasa de Filtración Glomerular , Leucoencefalopatías/fisiopatología , Anciano , Estudios de Casos y Controles , Trastornos Cerebrovasculares/diagnóstico por imagen , Delirio/diagnóstico por imagen , Delirio/etiología , Femenino , Tasa de Filtración Glomerular/fisiología , Humanos , Riñón/fisiopatología , Leucoencefalopatías/diagnóstico por imagen , Masculino , Neuroimagen , Insuficiencia Renal Crónica/complicaciones , Insuficiencia Renal Crónica/fisiopatología , Estudios Retrospectivos , Factores de Riesgo , Tomografía Computarizada por Rayos X , Veteranos/estadística & datos numéricos , Sustancia Blanca/diagnóstico por imagen , Sustancia Blanca/patología
8.
Postgrad Med ; 132(3): 225-233, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-31609156

RESUMEN

Urinalysis is a commonly utilized laboratory test, and analysis of urine has been studied and used since ancient times. Urine contains a wide array of metabolites that can provide information regarding the current physiologic state of the body and clinical manifestations of disease. In this review, we discuss the mechanics of the dry chemistry component of the urine dipstick such as the reaction principles underlying various assays and potential effects of collection and storage on results. Additionally, we discuss the benefits and limitations of the urine dipstick as it pertains to its use as a low-cost tool in point-of-care settings and the reasoning for a lack of its use as a broad screening tool.


Asunto(s)
Manejo de Especímenes/normas , Urinálisis/instrumentación , Urinálisis/métodos , Orina/química , Humanos , Sensibilidad y Especificidad , Temperatura , Urinálisis/normas , Toma de Muestras de Orina/normas
9.
Kidney Int Rep ; 3(6): 1482-1488, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30450476
10.
Kidney Int Rep ; 3(5): 1202-1213, 2018 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-30197987

RESUMEN

INTRODUCTION: Currently, no effective therapies exist to reduce the high mortality associated with dialysis-dependent acute kidney injury (AKI-D). Serum biomarkers may be useful in understanding the pathophysiological processes involved with AKI and the severity of injury, and point to novel therapeutic targets. METHODS: Study day 1 serum samples from 100 patients and day 8 samples from 107 patients enrolled in the Veteran's Affairs/National Institutes of Health Acute Renal Failure Trial Network study were analyzed by the slow off-rate modified aptamers scan proteomic platform to profile 1305 proteins in each sample. Patients in each cohort were classified into tertiles based on baseline biomarker measurements. Cox regression analyses were performed to examine the relationships between serum levels of each biomarker and mortality. RESULTS: Changes in the serum levels of 54 proteins, 33 of which increased and 21 of which decreased, were detected when comparing samples of patients who died in the first 8 days versus patients who survived >8 days. Among the 33 proteins that increased, higher serum levels of fibroblast growth factor-23 (FGF23), tissue plasminogen activator (tPA), neutrophil collagenase (matrix metalloproteinase-8), and soluble urokinase plasminogen activator receptor, when stratified by tertiles, were associated with higher mortality. The association with mortality persisted for each of these proteins after adjusting for other potential risk factors, including age, sex, cardiovascular sequential organ failure assessment score, congestive heart failure, and presence of diabetes. Upper tertile levels of FGF23, tPA, and interleukin-6 on day 8 were associated with increased mortality; however, FGF23 barely lost significance after multivariable adjustment. CONCLUSIONS: Our results underscore an emerging proteomics tool capable of identifying low-abundance serum proteins important not only in the pathogenesis of AKI-D, but which is also helpful in discriminating AKI-D patients with high mortality.

11.
Adv Chronic Kidney Dis ; 24(1): 22-30, 2017 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-28224939

RESUMEN

The Veterans Affairs (VA) is the largest integrated health care system in the United States and is responsible for the care of a population with a disproportionately high rate of CKD. As such, ensuring access to kidney health services is a VA imperative. One facet of the VA's strategy to reduce CKD is to leverage the use of teletechnology to expand the VA's outreach to Veterans with kidney disease. A wide array of teletechnology services have been deployed to both pull in Veterans and push out kidney health services to Veterans in their preferred health care venue. Teletechnology, thus, expands Veteran choice, facilitates their access to care, and furthers the goal of delivering patient-centered kidney specialty care. The VA has demonstrated the feasibility of virtual delivery of kidney specialty care services and education via synchronous and asynchronous approaches. The challenges ahead include determining the relative health care value of kidney telehealth services, identifying Veterans most likely to benefit from specific technologies and optimizing the adoption of effective kidney telehealth services by both providers and patients alike to ensure optimal and timely kidney health care delivery.


Asunto(s)
Prestación Integrada de Atención de Salud , Accesibilidad a los Servicios de Salud , Nefrología , Insuficiencia Renal Crónica/terapia , Telemedicina , United States Department of Veterans Affairs , Humanos , Educación del Paciente como Asunto , Atención Dirigida al Paciente , Estados Unidos
12.
Prog Transplant ; 24(2): 163-8, 2014 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-24919733

RESUMEN

Living organ donation has become more common across the world. To ensure an informed consent process, given the complex issues involved with organ donation, independent donor advocacy is required. The choice of how donor advocacy is administered is left up to each transplant center. This article presents the experience and process of donor advocacy at University of Texas Southwestern Medical Center administered by a multidisciplinary team consisting of physicians, surgeons, psychologists, medical ethicists and anthropologists, lawyers, a chaplain, a living kidney donor, and a kidney transplant recipient. To ensure that advocacy remains fair and consistent for all donors being considered, the donor advocacy team at University of Texas Southwestern Medical Center developed the Independent Donor Ethical Assessment, a tool that may be useful to others in rendering donor advocacy. In addition, the tool may be modified as circumstances arise to improve donor advocacy and maintain uniformity in decision making.


Asunto(s)
Consentimiento Informado/ética , Trasplante de Riñón/ética , Donadores Vivos/ética , Defensa del Paciente/ética , Obtención de Tejidos y Órganos/ética , Humanos
13.
Nat Rev Nephrol ; 7(12): 706-17, 2011 Aug 09.
Artículo en Inglés | MEDLINE | ID: mdl-21826079

RESUMEN

The aging process affects all organs, including the kidneys. As part of this process, progressive scarring and a measurable decline in renal function occur in most people over time. The improved understanding of the processes that can lead to and/or hasten scarring and loss of renal function over time parallels advances in our understanding of the aging process. Clinical factors, including hypertension, diabetes mellitus, obesity, abnormal lipid levels and vitamin D deficiency, have been associated with increasing renal sclerosis with age. In addition, tissue factors such as angiotensin II, advanced glycation end products, oxidative stress and Klotho are associated with renal aging. These associations and possible interventions, including the control of blood pressure, blood sugar, weight, diet and calorie restriction might make renal aging more preventable than inevitable.


Asunto(s)
Envejecimiento/fisiología , Productos Finales de Glicación Avanzada/metabolismo , Enfermedades Renales/metabolismo , Riñón/metabolismo , Estrés Oxidativo , Animales , Humanos
14.
Contrib Nephrol ; 170: 209-216, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21659773

RESUMEN

In spite of excellent glucose and blood pressure control, including administration of angiotensin-converting enzyme inhibitors and/or angiotensin II receptor blockers, diabetic nephropathy (DN) still develops and progresses. The development of additional protective therapeutic interventions is, therefore, a major priority. Nuclear hormone receptors regulate carbohydrate metabolism, lipid metabolism, the immune response, inflammation and development of fibrosis. The increasing prevalence of DN has led to intense investigation of the role that nuclear hormone receptors may have in slowing or preventing the progression of renal disease. Several nuclear receptor-activating ligands (agonists) have been shown to have a renal protective effect in the context of DN. This review will discuss the evidence regarding the beneficial effects of the activation of the vitamin D receptor (VDR) and the farnesoid X receptor (FXR) in preventing the progression of DN, and will describe how the discovery and development of compounds that modulate the activity of VDR and FXR may provide potential additional therapeutic approaches in the management of DN.


Asunto(s)
Nefropatías Diabéticas/tratamiento farmacológico , Receptores de Calcitriol/agonistas , Receptores Citoplasmáticos y Nucleares/agonistas , Humanos , Receptores de Calcitriol/fisiología , Receptores Citoplasmáticos y Nucleares/fisiología
15.
Discov Med ; 10(54): 406-15, 2010 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-21122472

RESUMEN

Diabetic nephropathy (DN) remains the most common cause for end stage renal disease (ESRD) as the burden of diabetes increases worldwide. Nearly one-third of patients with diabetes develop nephropathy making early diagnosis critical in preventing long term kidney loss. Microalbuminuria is the earliest clinical manifestation of DN and is associated with substantial risk for progressive kidney damage. Hyperglycemia activates various inflammatory pathways both directly and via gene transcription to induce oxidative stress, reactive oxygen species, fibrotic factors TGF-ß, renin-angiotensin- aldosterone system (RAAS), and advanced glycation end-products, leading collectively to podocyte injury, malfunction, apoptosis, and protein deposition in extracellular matrix of the nephron with albumin leak. Furthermore elevated glucose may also induce epigenetic metabolic memory with continued complications leading to diabetic complications. In addition, other clinical factors including genetic predisposition, obesity, blood pressure, high lipids, and smoking add to the rate of progression in DN. Thus early diagnosis and normalizing glycemic control in addition to careful blood pressure, weight, lipid control, and smoking cessation remain important in decreasing DN progression particularly for those with higher genetic risk.With evolution in the understanding of mechanistic processes leading to DN, targeted therapies such as RAAS blockers, thiazolidinediones, statins, and fibric acid derivatives are being utilized. However the optimal treatment for DM continues to evolve as newer therapies including inhibitors of sodium glucose transport and preglycated proteins as well as antifibrotic agents are being actively investigated in decreasing DN progression.


Asunto(s)
Nefropatías Diabéticas/terapia , Glucemia/análisis , Nefropatías Diabéticas/diagnóstico , Nefropatías Diabéticas/patología , Progresión de la Enfermedad , Humanos , Hipoglucemiantes/uso terapéutico , Insulina/uso terapéutico , Trasplante de Páncreas
16.
Postgrad Med ; 122(6): 29-40, 2010 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-21084779

RESUMEN

Acute kidney injury (AKI) increases morbidity and mortality, particularly for the critically ill. Recent definitions standardizing AKI to reflect graded changes in serum creatinine and urine output (per the Risk, Injury, Failure, Loss, and End-stage renal failure [RIFLE] and Acute Kidney Injury Network [AKIN] criteria) with severity of renal injury and developments in AKI pathobiology are being utilized to identify biomarkers of early kidney injury. These developments may be useful in the early intervention of preventing AKI. Although there has been progress in the management of AKI, therapeutic challenges include appropriate prophylaxis prior to contrast administration, use of diuretics, vasopressors, and the type and dose of renal replacement therapy. Future use of bioartificial dialyzers, plasma therapies, and the possibility of stem cell regeneration of injured kidney tissue are being actively investigated to provide alternative treatment options for AKI. This review aims to provide an overview of current practices, available therapies, and continued research in AKI therapy.


Asunto(s)
Lesión Renal Aguda/diagnóstico , Lesión Renal Aguda/terapia , Biomarcadores/sangre , Fallo Renal Crónico/prevención & control , Lesión Renal Aguda/mortalidad , Lesión Renal Aguda/patología , Creatinina/sangre , Cuidados Críticos/métodos , Enfermedad Crítica , Cistatina C/orina , Progresión de la Enfermedad , Quimioterapia Combinada , Femenino , Humanos , Interleucina-18/orina , Fallo Renal Crónico/terapia , Pruebas de Función Renal , Masculino , Pronóstico , Diálisis Renal/métodos , Medición de Riesgo , Índice de Severidad de la Enfermedad , Análisis de Supervivencia
17.
Nat Rev Nephrol ; 6(7): 435-9, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20517291

RESUMEN

BACKGROUND: A 62-year-old man with a history of end-stage renal disease secondary to hypertension who was on continuous ambulatory peritoneal dialysis (CAPD), presented to a peritoneal dialysis clinic with subacute onset of abdominal pain, mainly in the epigastric region. INVESTIGATIONS: Full medical history, physical examination, laboratory tests, cultures of peritoneal dialysis fluid, radiography, ultrasonography and CT scanning of the abdomen and pelvis. DIAGNOSIS: Isolated fungal peritonitis caused by infection with Histoplasma capsulatum. MANAGEMENT: Removal of the peritoneal dialysis catheter, treatment with itraconazole for 6 months.


Asunto(s)
Histoplasma , Histoplasmosis/complicaciones , Fallo Renal Crónico/terapia , Diálisis Peritoneal Ambulatoria Continua , Peritonitis/microbiología , Antifúngicos/uso terapéutico , Educación Médica Continua , Histoplasmosis/diagnóstico , Histoplasmosis/tratamiento farmacológico , Humanos , Itraconazol/uso terapéutico , Fallo Renal Crónico/complicaciones , Masculino , Persona de Mediana Edad , Peritonitis/diagnóstico , Peritonitis/tratamiento farmacológico
18.
Semin Nephrol ; 29(6): 610-20, 2009 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-20006793

RESUMEN

The growing population of elderly with chronic kidney disease (CKD) is at greater risk for cardiovascular disease given an independent risk of CKD, as well as from added dyslipidemia of aging and renal dysfunction. Changes in lipid metabolism with more isodense and high-dense, triglyceride-rich particles, low high-density lipoprotein cholesterol, and increased triglyceride levels occur with CKD and aging, which are noted to have significant atherogenic potential. In addition, lipid abnormalities may lead to the progression of CKD. Cardiovascular mortality in the end-stage renal disease population is more than 10 times higher than the general population. Treatment of dyslipidemia in the general population suggests important benefits both in reducing cardiovascular risk and in the prevention of cardiovascular disease. Secondary analyses of elderly subgroups of various large prospective studies with statins suggest treatment benefit with statin use in the elderly. Similarly limited data from secondary analyses of CKD subgroups of larger prospective trials using statins also suggest a possible benefit in cardiovascular outcomes and the progression of kidney disease. However, randomized trials have yet to confirm similar benefits and targets of treatment for dyslipidemia in the elderly with CKD and end-stage renal disease. Treatment in the elderly with CKD should be individualized and outweigh risks of side effects and drug-drug interactions. There is a need for further specific investigation of dyslipidemia of CKD in the aging population in relation to renal disease progression and cardiovascular outcome.


Asunto(s)
Inhibidores de Hidroximetilglutaril-CoA Reductasas/uso terapéutico , Hiperlipidemias/fisiopatología , Insuficiencia Renal Crónica/fisiopatología , Anciano , Envejecimiento , Antihipertensivos/uso terapéutico , Progresión de la Enfermedad , Interacciones Farmacológicas , Femenino , Humanos , Hiperlipidemias/complicaciones , Hiperlipidemias/tratamiento farmacológico , Masculino , Insuficiencia Renal Crónica/complicaciones
19.
Nat Rev Nephrol ; 5(8): 450-62, 2009 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-19564889

RESUMEN

The presence of renal dysfunction in a patient receiving chemotherapy can be devastating. Although many patients with cancer have underlying compromised renal function, some chemotherapeutic agents can actually induce renal abnormalities. An understanding of which traditional and newer chemotherapy agents can affect renal function is useful for physicians so that they can monitor patients for renal abnormalities and initiate preventive strategies to minimize renal complications. This Review highlights renal abnormalities associated with current chemotherapy agents and provides suggestions for preventive measures.


Asunto(s)
Antineoplásicos/efectos adversos , Neoplasias/tratamiento farmacológico , Insuficiencia Renal/inducido químicamente , Relación Dosis-Respuesta a Droga , Humanos , Factores de Riesgo
20.
Postgrad Med ; 121(3): 52-60, 2009 May.
Artículo en Inglés | MEDLINE | ID: mdl-19491540

RESUMEN

Management of patients with diabetes mellitus and chronic kidney disease (CKD) is a challenging task because multiple factors in each condition may impact the other. Glycemic control offers significant benefits in the prevention of diabetic kidney disease (DKD), but other associated morbidities are also important to address. Patients with diabetes with insufficient glycemic and blood pressure control are at a high risk for developing both cardiovascular disease and progression of nephropathy. This article discusses proper screening, identification, and management in the different stages of DKD, with special considerations for dialysis and transplant patients. We also review information on altered metabolism of medications and the appropriate use of diabetic agents, including recommendations for management of glucose control in CKD.


Asunto(s)
Glucemia/metabolismo , Diabetes Mellitus/terapia , Hipoglucemiantes/uso terapéutico , Fallo Renal Crónico/complicaciones , Diálisis Renal/métodos , Diabetes Mellitus/sangre , Nefropatías Diabéticas/prevención & control , Humanos , Fallo Renal Crónico/terapia , Resultado del Tratamiento
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...