Abstract:
:Hyperhomocysteinemia is an independent cardiovascular risk factor, according to most observational studies and to studies using the Mendelian randomization approach, utilizing the common polymorphism C677T of methylene tetrahydrofolate reductase. In contrast, the most recent secondary preventive intervention studies, in the general population and in chronic kidney disease (CKD) and uremia, which are all negative (with the possible notable exception of stroke), point to other directions. However, all trials use folic acid in various dosages as a means to reduce homocysteine levels, with the addition of vitamins B6 and B12. It is possible that folic acid has negative effects, which offset the benefits; alternatively, homocysteine could be an innocent by-stander, or a surrogate of the real culprit. The latter possibility leads us to the search for potential candidates. First, the accumulation of homocysteine in blood leads to an intracellular increase of S-adenosylhomocysteine (AdoHcy), a powerful competitive methyltransferase inhibitor, which by itself is considered a predictor of cardiovascular events. DNA methyltransferases are among the principal targets of hyperhomocysteinemia, as studies in several cell culture and animal models, as well as in humans, show. In CKD and in uremia, hyperhomocysteinemia and high intracellular AdoHcy are present and are associated with abnormal allelic expression of genes regulated through methylation, such as imprinted genes, and pseudoautosomal genes, thus pointing to epigenetic dysregulation. These alterations are susceptible to reversal upon homocysteine-lowering therapy obtained through folate administration. Second, it has to be kept in mind that homocysteine is mainly protein-bound, and its effects could be linked therefore to protein homocysteinylation. In this respect, increased protein homocysteinylation has been found in uremia, leading to alterations in protein function.
journal_name
Semin Dialjournal_title
Seminars in dialysisauthors
Perna AF,Ingrosso D,Violetti E,Luciano MG,Sepe I,Lanza D,Capasso R,Ascione E,Raiola I,Lombardi C,Stenvinkel P,Massy Z,De Santo NGdoi
10.1111/j.1525-139X.2009.00579.xsubject
Has Abstractpub_date
2009-07-01 00:00:00pages
351-6issue
4eissn
0894-0959issn
1525-139Xpii
SDI579journal_volume
22pub_type
杂志文章,评审abstract::Almost 30% of prevalent hemodialysis patients use catheters for vascular access although outcomes are superior with the use of either an arteriovenous fistula or a synthetic graft. Catheter complications are a major cause of morbidity and mortality for hemodialysis patients and increase the burden on the health care s...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139X.2008.00499.x
更新日期:2008-11-01 00:00:00
abstract::Atrial fibrillation, venous thromboembolism, and access malfunction are common clinical problems in dialysis patients that prompt consideration of warfarin therapy. Atrial fibrillation appears to be more common in people with low glomerular filtration rate (GFR) or on dialysis than in the general population, but the r...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139X.2009.00632.x
更新日期:2009-09-01 00:00:00
abstract::In response to rapid alkali delivery during hemodialysis, hydrogen ions (H+ ) are mobilized from body buffers and from stimulation of organic acid production in amounts sufficient to convert most of the delivered bicarbonate to CO2 and water. Release of H+ from nonbicarbonate buffers serves to back-titrate them to a m...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12779
更新日期:2019-05-01 00:00:00
abstract::A patient with newly diagnosed end-stage renal disease (ESRD) received a femoral catheter for hemodialysis (HD). Shortly thereafter he developed fever, and blood cultures grew methicillin-resistant Staphylococcus aureus. The catheter was removed and the patient was treated with both vancomycin and rifampin; however, b...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2005.18323.x
更新日期:2005-07-01 00:00:00
abstract::Peritoneal dialysis (PD) is a markedly underutilized modality for permanent renal replacement therapy in the United States owing to a low rate of patient referral and high rate of patient dropout or transfer to hemodialysis. One cause for patient loss from PD is problematic PD catheters that often are removed rather t...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2006.00148.x
更新日期:2006-03-01 00:00:00
abstract::Translumbar tunneled dialysis catheter (TLDC) is a temporary dialysis access for patients exhausted traditional access for dialysis. While few small studies reported successes with TLDC, additional studies are warranted to understand the short- and long-term patency and safety of TLDC. We conducted a retrospective ana...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12358
更新日期:2015-07-01 00:00:00
abstract::Tunneled dialysis catheters (TDC) become dysfunctional because of placement problems, infection, thrombosis, and fibrin sheath formation. Occasional patients who are catheter dependant develop frequent catheter dysfunction because of thrombosis or thrombosis associated with fibrin sheath formation. This article attemp...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2010.00802.x
更新日期:2010-11-01 00:00:00
abstract::Data derived from a large cohort of hemodialysis patients (12,896) undergoing dialysis access maintenance procedures being performed by interventional nephrologists were analyzed to determine the safety of sedation/analgesia (S/A) in a freestanding facility. Data collected included patient demographics, procedures per...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2011.00844.x
更新日期:2011-01-01 00:00:00
abstract::Hemodialysis patient outcomes are often suboptimal, with one-sixth of patients receiving an inadequate dialysis dose, one-fourth using catheters for vascular access, and more than one-half being malnourished. This review describes a four-step approach for improving dialysis patient outcomes. First, select an outcome t...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1046/j.1525-139x.2002.00013.x
更新日期:2002-01-01 00:00:00
abstract::Congestive heart failure (CHF) is highly prevalent in patients on renal replacement therapy and is a leading cause of death in such patients. Several studies suggest that therapeutic agents for the treatment of CHF, particularly angiotensin converting enzyme inhibitors and beta-blockers, are underused in end-stage ren...
journal_title:Seminars in dialysis
pub_type: 社论
doi:10.1111/j.1525-139X.2007.00313.x
更新日期:2007-09-01 00:00:00
abstract::We describe the use of directional atherectomy (DA) to restore patency of a thrombosed polytetrafluoroethylene arteriovenous graft with an in-stent restenosis at the venous anastomosis. Technically, the procedure described is not an atherectomy per se, but rather the removal of fibrosis and intimal hyperplasia with sh...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2007.00418.x
更新日期:2008-05-01 00:00:00
abstract::This review aims to summarize the available evidence of the effectiveness of oral iron in patients receiving dialysis. Four small randomized controlled trials (105 evaluated patients) compared oral iron supplements with placebo or no treatment; hemoglobin and ferritin levels did not differ significantly between groups...
journal_title:Seminars in dialysis
pub_type: 社论,评审
doi:10.1111/sdi.12149
更新日期:2014-01-01 00:00:00
abstract::The treatment of end-stage renal disease (ESRD) makes extensive use of presterilized disposable items which, after use, are contaminated by blood. The preferred route of disposal of such items is by incineration. Disposal costs have risen and this increase in costs has not been matched by waste management programs in ...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139X.2005.00078.x
更新日期:2005-09-01 00:00:00
abstract::Meta-analyses of the published literature are increasingly being used, allowing similar clinical trials to be combined quantitatively, thereby increasing the precision of the estimation of treatment effect. Four meta-analyses were recently published comparing the impact of dialysis membranes or dialysis modality on cl...
journal_title:Seminars in dialysis
pub_type: 社论,评审
doi:10.1046/j.1525-139x.2003.16071.x
更新日期:2003-09-01 00:00:00
abstract::To prevent pyrogenic reactions during hemodialysis, it is recommended that bacteria and endotoxin in dialysate not exceed 100-200 colony forming units (CFU)/ml and 0.25-2 endotoxin units (EU)/ml, respectively. While these limits are adequate to prevent acute pyrogenic reactions, data are accumulating to suggest they m...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.0894-0959.2004.17617.x
更新日期:2004-11-01 00:00:00
abstract::There are studies reporting that soluble kltho (sKlotho) deficiency plays a role in cardiovascular disease in addition to traditional risk factors such as diabetes, hypertension, anemia, smoking, and excessive volume burden. Our aim in this study was to investigate the relationship of sKlotho with uremic cardiomyopath...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12942
更新日期:2020-11-30 00:00:00
abstract::Over the last 10 years an increasing number of patients worldwide have started dialysis or had transplantation. Many are elderly with complex comorbid conditions. Registries across the world all show a rapid and dramatic increase in the number of older patients accepted for renal replacement therapy. In addition, the ...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1046/j.1525-139x.2002.00028.x
更新日期:2002-03-01 00:00:00
abstract::Both the morbidity of the uremic syndrome and the generation of uremic toxins are attributed to malnutrition. If protein intake and catabolism result in the generation of solutes, then nutritional intake should be related directly to toxicity. On the other hand, inadequate nutrition has been linked to inflammation and...
journal_title:Seminars in dialysis
pub_type: 社论
doi:10.1046/j.1525-139x.2002.00076.x
更新日期:2002-09-01 00:00:00
abstract::Arteriovenous fistula (AVF) nonmaturation is currently a significant clinical problem; however, the mechanisms responsible for this have remained unanswered. Previous work by our group and others has suggested that anatomical configuration and the corresponding hemodynamic endpoints could have an important role in AVF...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2012.01112.x
更新日期:2013-03-01 00:00:00
abstract::Arteriovenous grafts (AVGs) suffer from high thrombosis rates. It is not known whether placement of stent grafts at the venous anastomosis (VA) of thrombosed AVGs would impact future thrombosis. This is a retrospective study evaluating a group of AVGs that underwent endovascular thrombectomy with placement of a stent ...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12254
更新日期:2014-11-01 00:00:00
abstract::The prevalence of arrhythmia has increased in hemodialysis (HD) patients and the most frequent is atrial fibrillation (AF). It was reported that the amount of epicardial fat tissue (EFT) in the population without renal disease is closely related to AF. In the present study of ours, the relation between EFT thickness a...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12901
更新日期:2020-09-01 00:00:00
abstract::The specialty of Nephrology, by virtue of its relationship with the dialysis procedure, is highly vulnerable to litigation. As is the case with all nephrologists, a dialysis unit medical director is not immune to medical malpractice suits, and can be held liable for any act of perceived or potential harm to any dialys...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12174
更新日期:2014-09-01 00:00:00
abstract::There is abundant evidence that chronic renal failure (CRF) and end-stage renal disease (ESRD) alter drug disposition by affecting protein and tissue binding and reducing systemic clearance of renally cleared drugs. What is not fully appreciated is that CRF can significantly reduce nonrenal clearance and alter the bio...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1046/j.1525-139x.2003.03011.x
更新日期:2003-01-01 00:00:00
abstract::Cardiovascular morbidity and mortality remain frustratingly common in dialysis patients. A dearth of established evidence-based treatment calls for alternative therapeutic avenues to be embraced. Sympathetic hyperactivity, predominantly due to afferent nerve signaling from the diseased native kidneys, has been establi...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12756
更新日期:2019-05-01 00:00:00
abstract::Arteriovenous fistulas (AVFs) and arteriovenous grafts (AVGs) are the vascular accesses of choice for long-term hemodialysis. Strategies to establish and maintain functioning AVFs and AVGs are essential. In addition to clinical evaluation, ultrasound plays a critical role in the evaluation and maintenance of AVFs and ...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12599
更新日期:2017-07-01 00:00:00
abstract::Hospitalizations drive up to 35% of the astronomical costs of care for patients on hemodialysis and are associated with poor outcomes. We describe outpatient care-sensitive categories of hospitalization risks in an effort to engage stakeholders and patients, as stakeholders, in mitigating hospitalizations. These categ...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12675
更新日期:2018-05-01 00:00:00
abstract::Hypertension among patients on hemodialysis is common, difficult to diagnose and often inadequately controlled. Although specific blood pressure (BP) targets in this particular population are not yet established, meta-analyses of randomized trials showed that deliberate BP-lowering with antihypertensive drugs improves...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12741
更新日期:2018-11-01 00:00:00
abstract::The etiology and management of intradialytic hypotension has become an increasingly complex issue. Volume depletion due to ultrafiltration remains the predominant underlying etiologic factor. However, patients vary markedly in their hemodynamic tolerance to fluid removal. While many risk factors have been identified, ...
journal_title:Seminars in dialysis
pub_type: 社论,评审
doi:10.1046/j.1525-139x.2002.00002.x
更新日期:2002-05-01 00:00:00
abstract::A thorough consideration of all factors contributing to successful dialysis access creation is necessary to achieve optimal outcomes. A high bifurcation of the brachial artery (brachioradial variant) occurs in greater than 20% of patients. Dialysis access was created in 22 limbs with this variant--15 fistula, and 7 pr...
journal_title:Seminars in dialysis
pub_type: 杂志文章,收录出版
doi:10.1111/j.1525-139X.2011.00923.x
更新日期:2011-11-01 00:00:00
abstract::Peritoneal dialysis (PD) is a simple, safe, gentle, and efficient renal replacement therapy (RRT) method. It is able to correct acute kidney injury (AKI)-induced metabolic, electrolytic, and acid-base disorders and volume overload both in and out the intensive care unit setting. Some PD modalities, such as high-volume...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139X.2011.00868.x
更新日期:2011-03-01 00:00:00