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The slow, progressive accumulation of pathology characteristic of Alzheimer's disease is the principal determinant of cognitive decline leading to dementia. Risk-reduction strategies during midlife focus on raising the clinical threshold for the appearance of cognitive symptoms and on reducing the extent of Alzheimer pathology. Best available evidence suggests an approach based on three, conceptually distinct strategies. (1) Raise the threshold for cognitive symptoms by improving brain health. To achieve this goal, the tactic is to reduce cerebrovascular risks mediated by hypertension, diabetes, cigarette smoking, and hyperlipidemia. (2) Raise the threshold for cognitive symptoms by enhancing cognitive reserve. Here, tactics focus on mental stimulation associated with occupation, leisure activities and social engagement. (3) Reduce the burden of Alzheimer pathology. The most promising tactic toward this end is regular aerobic exercise. Tactics in support of strategies to reduce cognitive impairment due to Alzheimer pathology are not yet substantiated by robust, consistent clinical trial evidence. There is pressing need for well-designed pragmatic trials to provide stronger evidence on preventive strategies for late-life cognitive decline and dementia.
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PMID:Three midlife strategies to prevent cognitive impairment due to Alzheimer's disease. 2489 36

Longitudinal studies carried out in this laboratory for the past 12 years among patients with ischemic vascular dementia (IVD) are summarized. The criteria for the diagnosis of probable IVD and definite IVD are described and are consonant with the State of California Alzheimer's Disease Diagnostic and Treatment Centers recommended criteria. Demography of IVD patients and associated risk factors are described, and the types of cerebral infarcts causing IVD are listed. Control of risk factors for stroke stabilizes patients with IVD as judged by serial cognitive testing. Control of hypertension and cigarette smoking and a reduction in hyperlipidemia all benefit IVD patients. Best cognitive results are obtained if hypertension is controlled within the upper limits of normal with mean systolic blood pressure values maintained above and around 137 mm Hg. Serial measurements of cerebral perfusion indicate that cognition and cerebral perfusion fluctuate together. When demented and nondemented patients with stroke are compared, overall cerebral perfusion is reduced to a greater extent in the stroke patients with dementia, particularly within cortical gray matter and subcortical white matter. Leuko-araiosis is twice as great in demented stroke patients compared to stroke patients who are cognitively intact. In longitudinal studies, cerebral perfusion declined further among stroke patients with cognitive deterioration, but, when cerebral perfusion became stabilized, cognitive performance likewise stabilized or improved.
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PMID:Longitudinal outcome among patients with ischemic vascular dementia(1). 2648 53

Excess and ectopic fat accumulation in obesity is a major risk factor for developing hyperlipidemia, type 2 diabetes and cardiovascular disease. The activation of brown and/or beige adipocytes is a promising target for the treatment of metabolic disorders as the combustion of excess energy by these thermogenic adipocytes may help losing weight and improving plasma parameters including triglyceride, cholesterol and glucose levels. The regulation of heat production by thermogenic adipose tissues is based on a complex crosstalk between the autonomous nervous system, intracellular and secreted factors. This multifaceted alignment regulates thermogenic demands to environmental circumstances in dependence on available energy resources. This review summarizes the current knowledge how thermogenic tissues can be targeted to combat the burden of diseases with a special focus on lipid metabolism and diseases related to lipoprotein metabolism.
Best Pract Res Clin Endocrinol Metab 2016 Aug
PMID:Implications of thermogenic adipose tissues for metabolic health. 2769 10

Improved short- and long-term survival of liver transplant recipients has led to increased focus on complications of both the early and late posttransplant periods. A variety of metabolic complications have been observed in the post-orthotopic liver transplant population, including hypertension, hyperlipidemia, obesity, diabetes mellitus, nonalcoholic fatty liver disease, and nonalcoholic steatohepatitis. Although only a small proportion of patients experience metabolic complications prior to transplantation, the prevalence of these complications posttransplantation reaches or exceeds that of the general population. This is of particular concern, as cardiovascular disease is the second leading cause of death in the late transplant period. A number of mechanisms mediate these metabolic complications, including reversal of cirrhosis pathophysiology, patient lifestyle factors, and immunosuppressive medications. Titration and modification of immunosuppression have been demonstrated to improve and sometimes even eliminate these conditions. Therefore, given the multiple etiologies contributing to the metabolic derangements, an effective management approach must incorporate lifestyle modifications, immunosuppression titration, and medical management. Best practices and understanding of the mechanisms underlying these complications allow for discussion of initial therapies and strategies; however, further study is necessary to determine the optimal management of metabolic complications over time.
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PMID:Medical Management of Metabolic Complications of Liver Transplant Recipients. 2791 74

The 2017 update of The Canadian Stroke Best Practice Recommendations for the Secondary Prevention of Stroke is a collection of current evidence-based recommendations intended for use by clinicians across a wide range of settings. The goal is to provide guidance for the prevention of ischemic stroke recurrence through the identification and management of modifiable vascular risk factors. Recommendations include those related to diagnostic testing, diet and lifestyle, smoking, hypertension, hyperlipidemia, diabetes, antiplatelet and anticoagulant therapies, carotid artery disease, atrial fibrillation, and other cardiac conditions. Notable changes in this sixth edition include the development of core elements for delivering secondary stroke prevention services, the addition of a section on cervical artery dissection, new recommendations regarding the management of patent foramen ovale, and the removal of the recommendations on management of sleep apnea. The Canadian Stroke Best Practice Recommendations include a range of supporting materials such as implementation resources to facilitate the adoption of evidence to practice, and related performance measures to enable monitoring of uptake and effectiveness of the recommendations. The guidelines further emphasize the need for a systems approach to stroke care, involving an interprofessional team, with access to specialists regardless of patient location, and the need to overcome geographic barriers to ensure equity in access within a universal health care system.
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PMID:Canadian stroke best practice recommendations: Secondary prevention of stroke, sixth edition practice guidelines, update 2017. 2917 61

Despite near universal use of ursodeoxycholic acid (UDCA) several patients with PBC still progress to liver transplant (LT) or death. Pruritus and fatigue are the most common symptoms. Liver transplantation for pruritus is highly effective but fatigue will not disappear in the majority of the patients. In contrast to other liver diseases, portal hypertension may develop in pre-cirrhotic patients with PBC. Patients with PBC have an incidence rate of 3.4 hepatocellular carcinoma cases for every 1000 patient-years and risk factors are advanced stage of the disease and male sex. For the appropriate timing of LT the utility of prognostic models (bilirubin, Mayo risk score and MELD, in particular) and standard exception points in case of HCC are established. However, recent data from different part of the world demonstrated that PBC patients compared to patients with PSC have higher waiting-list mortality. Hyperlipidemia can be present in up to 80% of the patients but there is no evidence for an elevated cardiovascular risk, certainly not in relationship with LT. Patients transplanted for PBC suffer more frequently from acute cellular and also late cellular rejection. However, 5-year patient survival rates after LT of 80-85% is better than for most other indications. Recurrent PBC is reported in a range from 14% up to 42% after LT but in contrast to other autoimmune diseases graft loss due to recurrent disease is not a major issue. The type of immunosuppression after LT was found to be associated with the incidence of recurrence but since mediate-term impact on overall and graft survival is negligible, tacrolimus-based regimens remain standard at most centers. Observational studies suggest that long-term administration of UDCA following LT has a beneficial effect on recurrence of PBC. Therefore biomarkers after LT that may identify patients at risk for recurrence should be further explored to allows early medical intervention.
Best Pract Res Clin Gastroenterol
PMID:PBC-transplantation and disease recurrence. 3034 4


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