By U. Murat. Massachusetts School of Professional Psychology.
Microalbuminuria in diabetes: A population study of the prevalence and an assessment of three screening tests generic pariet 20mg free shipping. Albumin excretion rate purchase pariet toronto, albumin concentration 20mg pariet for sale, and albumin/creatinine ratio compared for screening diabetics for slight albuminuria. Utility of untimed urinary albumin measurements in assessing albuminuria in black NIDDM subjects. The validity of screening based on spot morning urine samples to detect subjects with microalbuminuria in the general population. Use of albumin creatinine ratio and urine albumin concentration as a screening test for albuminuria in an Indo-Asian population. Association between albuminuria and proteinuria in the general population: the AusDiab Study. Use of urine albumin measurement as a replacement for total protein. Assessing proteinuria in chronic kidney disease: protein–creatinine ratio versus albumin–creatinine ratio. How effective are screening tests for microalbuminuria in random urine specimens? Cost-benefit analysis and prediction of 24-hour proteinuria from the spot urine protein–creatinine ratio. Longitudinal studies on the rate of decline in renal function with age. Estimating the prevalence of renal insufficiency in seniors requiring long-term care. Proteinuria and the risk of developing end-stage renal disease. Very low levels of microalbuminuria are associated with increased risk of coronary heart disease and death independently of renal function, hypertension, and diabetes. Urinary albumin excretion predicts cardiovascular and noncardiovascular mortality in general population. Low-grade albuminuria and incidence of cardiovascular disease events in nonhypertensive and nondiabetic individuals: the Framingham Heart Study. Cardiovascular outcomes in high-risk hypertensive patients stratified by baseline glomerular filtration rate. Chronic kidney disease, cardiovascular risk, and response to angiotensin-converting enzyme inhibition after myocardial infarction: the Survival And Ventricular Enlargement (SAVE) study. Acute myocardial infarction and renal dysfunction: a high-risk combination. Renal function as a predictor of outcome in a broad spectrum of patients with heart failure. Outcomes of acute coronary syndrome in a large Canadian cohort: impact of chronic renal insufficiency, cardiac interventions, and anemia. Impact of renal failure on the risk of myocardial infarction and death. Chronic kidney disease and cognitive impairment in menopausal women. Impact of renal insufficiency on mortality in advanced lower extremity peripheral arterial disease. Impact of comorbidities on mortality in managed care patients with CKD. Independent components of chronic kidney disease as a cardiovascular risk state: results from the Kidney Early Evaluation Program (KEEP). Kidney function and risk of peripheral arterial disease: Results from the Atherosclerosis Risk in Communities (ARIC) study. CKD progression and mortality among older patients with diabetes. Glomerular filtration rate, cardiorenal end points, and all-cause mortality in type 2 diabetic patients. The presence of frailty in elderly persons with chronic renal insufficiency. Chronic kidney disease and cognitive impairment in the elderly: the health, aging, and body composition study. Relationship between predicted creatinine clearance and proteinuria and the risk of developing ESRD in Okinawa, Japan. The progression of chronic kidney disease: A 10-year population-based study of the effects of gender and age. Mortality risk stratification in chronic kidney disease: one size for all ages? Screening strategies for chronic kidney disease in the general population: follow-up of cross sectional health survey. International comparison of the relationship of chronic kidney disease prevalence and ESRD risk. Prevalence of kidney damage in Australian adults: The AusDiab kidney study. Risk factors for chronic kidney disease: a prospective study of 23,534 men and women in Washington County, Maryland. Assessing the prevalence, monitoring and management of chronic kidney disease in patients with diabetes compared with those without diabetes in general practice. Association between body mass index and CKD in apparently healthy men. Lifestyle factors, obesity and the risk of chronic kidney disease. Metabolic syndrome and the risk for chronic kidney disease among nondiabetic adults. Cardiovascular disease and subsequent kidney disease.
However cheap 20mg pariet with amex, these studies were performed in the glutamate/glutamine cycle and neuronal oxidative glu- cellular and tissue preparations pariet 20mg, which have a low rate of cose consumption buy pariet from india. Glutamate is cotransported into the glia synaptic metabolism relative to intact cerebral cortex. In with two to three Na ions, with one K ion countertrans- support of this conclusion Conti and Minelli (42) showed ported (60,78,94). Transport of three Na ions out of the that inhibition of PAG, which is enriched in nerve terminals 25: Glutamate and GABA Neurotransmitter Cycles 329 (55) and has been proposed to primarily replete the vesicular ling between the glutamate/glutamine cycle and glial glu- pool of glutamate (34), results in a similar rapid depletion cose uptake. This mechanism may account for between 60% of both synaptic and whole cell glutamate in the rat cerebral and 80% of the rate of total glucose oxidation in awake cortex. However, there are alternate potential performed looking at glutamine synthesis in mice in which explanations for the in vivo results that need to be tested. In these studies mice were given fluoro- directly distinguishing glial glucose uptake from neuronal acetate and injected with a combination of [1,2-13C] acetate glucose uptake and phosphorylation in the intact cerebral and [1-13C] glucose. In addition, the stoichiometry between neuronal distribution in glutamate and glutamine, the labeling from glucose oxidation and the glutamate/glutamine cycle re- glucose and acetate was distinguished. The labeling from mains to be measured under conditions of sensory stimula- acetate in glutamate and glutamine was greatly reduced by tion, and in different brain regions. Despite this inhibition, there was still a substan- IN VIVO MRS STUDIES OF GABA tial amount of glutamine labeling from [1-13C] glucose, METABOLISM AND THE EFFECTS OF approximately one-third to one-half the labeling found in DISEASE AND PHARMACOLOGIC the control mice. The only mechanism by which this label- TREATMENT ON HUMAN GABA ing of glutamine from glucose could occur is the glutamate/ METABOLISM glutamine cycle, because glutamate labeling in the astrocyte from glucose was completely blocked. The ability to main- GABA is the major inhibitory neurotransmitter in the cere- tain a high glutamate/glutamine cycle flux, despite the near- bral cortex (46,47). It is synthesized from glutamate in spe- complete inhibition of glial mitochondrial ATP generation, cialized cells called GABAergic neurons. The release of has been interpreted by Bachelard (98) as supporting the GABA by a GABAergic neuron inhibits the electrical activ- importance of the glutamate/glutamine cycle as well as the ity of adjacent neurons. Several antiepileptic and also quite clearly demonstrates that even though the glial psychiatric drugs are targeted at the GABAergic system. GABA is overlapped in the in vivo 1H MRS spectrum by TCA cycle is blocked by the toxin, the glia are still capable of participating in the glutamate-glutamine cycle, taking up the more intense resonances of macromolecules (103), glu- tathione, and creatine. The development of 1H MRS spec- glutamate from the neurones and converting it to gluta- mine. Consistent with this pre- logic treatment on GABA metabolism are reviewed below. Vigabatrin irreversibly inhibits the enzyme GABA transami- Consistent with this finding, Pan et al. GABA-T catalyzes the breakdown of increase in brain lactate in 3-day-fasted human subjects with GABA in GABAergic neurons and in astrocytes. By inhibit- elevated plasma ketone concentrations, ing GABA-T, the drug leads to an elevation in GABA con- centration. The ability of 1H MRS editing to measure GABA elevated by GABA-T inhibitors was first demon- Summary and Remaining Questions strated in the rat brain (106,107). Subsequent MRS editing The linear relationship and stoichiometry found using 13C studies of vigabatrin action on patients have made several MRS of the rates of the glutamate/glutamine cycle and neu- new observations relevant to optimum administration of ronal glucose oxidation support a direct mechanistic coup- the drug including (a) chronic dosing above 3 g per day 330 Neuropsychopharmacology: The Fifth Generation of Progress catabolic pathways. GAD exists as two major isoforms (GAD67 and GAD65) in the brain; each is the product of separate genes (113,114) and each has distinct kinetic prop- erties (114,115). GAD67 is distributed throughout the cyto- plasm of GABAergic neurons, whereas GAD65 is associated with synaptic terminals. Recently, it was shown that the 67- kd isoform of GAD protein is reduced in response to ele- vated levels of GABA in vitro and in vivo (116,117). Differ- ential control of the GAD isoforms suggests that they may mediate different fluxes. To investigate the effects of ele- vated GABA on GABA synthesis and quantitatively assess the role of the GAD isoforms in GABA synthesis, rates of turnover of cortical glutamate and GABA were determined in anesthetized rats during an infusion of [1-13C] glucose after administration of the GABA-transaminase inhibitor vigabatrin (500 mg/kg, i. GABA concentration was increased twofold at 24 hours. In vivo H MRS spectra of total edited GABA from the occipital lobe of a patient with epilepsy before and after treatment compared to nontreated rats despite the increased treatment with vigabatrin. An analysis of the turnover data revealed a using spectral editing (112) from a 14-cm3volume centered on the 70% decrease in the rate of GABA synthesis following midline in thevisual cortex. Chronic treatmentwith vigabatrin led to an over twofold increase in the concentration of total edited vigabatrin-treatment (control, 0. The reduction in GABA synthesis concomitant with the selective inhibition of GAD67 suggests that GAD67 accounts for the major fraction of GABA synthesis in the rat cerebral cortex under anesthe- fails to additionally increase GABA concentration (108), (b) tized nonstimulated conditions. This conclusion is sup- GABA concentration reaches a maximum level within 2 ported by studies of GAD67 and GAD65 in knockout mice hours of initial drug administration (109), (c) the effective- (118,119), which have found an order of magnitude greater ness of vigabatrin in controlling seizures depends on elevat- reduction in GABA concentration in the mice with a ing GABA concentration above the mean level found in GAD67 knockout. The isoform composition of human nonepileptic subjects (108), (d) GABA concentration is in- brain is presently unknown. These drugs include GABApentin, topiri- of epilepsy (108,112). The elevation of GABA may be an important mechanism in the effectiveness of these medications as antiepileptic compounds. In addition, these Cortical GABA Synthesis Is Reduced findings provide evidence that the regulation of GABA Following Prolonged GABA-Transaminase metabolism is tightly integrated with the regulation of Inhibition GABAergic function. As with vigabatrin, the concentration of above a dose of 3 g/day (108). The enzymatic mechanisms GABA reaches a maximum of two times the predrug con- controlling GABA levels in vivo are complex, involving centration within 2 hours of drug administration. A similar short-term regulation of GAD by modulators (e. The ability of 1H MRS to track i longer-term regulation involving enzyme protein levels, the response of the GABAergic system to pharmacologic availability of glutamate precursors and their pathways (e. Parsing the Edited GABA Resonance The edited GABA resonance consists of GABA and the GABA derivative homocarnosine, which is a condensation product of GABA and histidine.
Using intervention creators as intervention communicators Suggestion: Enable access to experts order pariet 20mg, but rely on communicators who will elicit the attention of potential adopters cheap 20 mg pariet. Introducing interventions before they are ready Suggestion: Publicize interventions only after clear results have been obtained order pariet overnight delivery. Assuming that information will infuence decision-making Suggestion: Information is necessary, but influence is usually needed too. Therefore pair sources of information with sources of social and political influence. Confusing authority with infuence Suggestion: Gather data on who among potential adopters is seen as a source of advice and use them to acceler- ate dissemination. Allowing those who are frst to adopt (innovators) to gain primacy in dissemination eforts Suggestion: Initial adopters are not always typical or influential. Find out how potential adopters and key users are related to each other in order to identify those who are most influential (109). Failing to distinguish between change agents, authority fgures, opinion leaders and innovation champions Suggestion: Single individuals do not usually play multiple roles, so determine what part each person can play in the dissemination process. Selecting demonstration sites on criteria of motivation and capacity Suggestion: The spread of an intervention depends on how initial demonstration sites are seen by others. So, when selecting demonstration sites, consider which sites will have a positive influence. Advocating single interventions as the solution to a problem Suggestion: One intervention is unlikely to fit all circumstances; offering a cluster of evidence-based practices is usually more effective (105, 110). Tird, by what criteria do potential users circumstances. By and large, programmes can decide to adopt a new intervention? Ideally, the be expected to work imperfectly at frst and will decision formally to adopt will ultimately be need to be adapted and refned (105). To help answer these four questions for a And fourth, once the decision to adopt variety of interventions in diferent settings, an has been taken, how should an intervention be assortment of networks, tools and instruments implemented and evaluated? In practice, there is available, including EvipNet, SURE, TRAction is a tension between preserving the interven- and SUPPORT (Box 4. In the context of health tion in its original form and adapting it to local systems performance, the methods for judging 114 Chapter 4 Building research systems for universal health coverage Box 4. Translating research into policy and practice There is an important distinction between evidence used to set policy and evidence used to influence practice. The first two examples below focus on policy, the third on practice. Evidence-Informed Policy Networks (EVIPNet) The purpose of EVIPNet (www. EVIPNet is a network of teams in more than 20 countries around the world, which synthesize research findings, produce policy briefs, and organize policy forums that bring together policy-makers, researchers and citizen groups. Recent initiatives have, for example, helped to improve access to ACT for the treatment of malaria in Africa and debated the role of primary health care in the management of chronic noncommunicable diseases in the Americas (112). As a component of EVIPnet, SURE (Support for the Use of Research Evidence) offers a set of guides for preparing and using policy briefs to support health systems development in Africa. SUPPORT tools for evidence-informed health policy-making SUPPORT is a collection of articles that describe how to use scientific evidence to inform health policy (113). The series shows, among other things, how to make best use of systematic reviews and how in general to use research evidence to clarify problems linked to health policy. The Translating Research into Action (TRAction) project Recognizing that many health problems in developing countries already have solutions that have not been applied, TRAction (www. TRAction is part of the Health Research Program (HaRP) of the United States Agency for International Development (USAID). However, new tools are needed ment located within a health ministry should to help assess evidence from systematic reviews be well positioned to transfer research fndings in terms of the acceptability of policy options to policy-makers and to help oversee national to stakeholders and the feasibility of implemen- research practice – for instance by setting up tation, and in terms of equity. Research is also national databases of research projects approved needed on ways to develop, structure and pre- and completed, of scientifc publications pro- sent policy options in relation to the functions duced, and of patents awarded. When researchers are put in close contact Researchers and decision-makers typi- with policy-makers they will be in a position not cally work in diferent communities, and the simply to produce results on demand but also to research described in technical publications shape the research agenda (117). For instance, and scientifc journals cannot easily be evalu- routine evaluation of public health programmes ated by most of the people who make most of is an important source of questions for research, the decisions (see Box 2. Te infuence of research depends on how One weakness of existing schemes for promot- research activities are positioned with respect ing universal health coverage is that they fail to to the bodies that are responsible for setting involve evaluators from the start (119). For maximum efect, health scientists placed in public health programmes research should be embedded as a core function would stimulate monitoring and evaluation. Tese registration of clinical trials; are closely related and have repeatedly been ■ in collaboration with other organizations proposed as ways of promoting and support- that currently gather data on science and ing high-priority research (120–122). UNESCO, recently, the report of the Consultative Expert OECD, the Network for Science and Working Group on Research and Development: Technology Indicators – Ibero-American Financing and Coordination (CEWG) made a and Inter-American, the World Intellectual series of recommendations to support R&D for Property Organization), bring together health technology, and the Alliance on Health information on research publications, Policy and Systems Research did the same for clinical trials and patents, as envisaged in HPSR (Box 4. Many of the the Global Strategy and Plan of Action on ideas for promoting R&D and HPSR apply to Public Health, Innovation and Intellectual all aspects of health research, so these are drawn Property (Box 2. WHO Strategy on Health Policy and Systems Research The WHO Strategy on Health Policy and Systems Research (HPSR), launched in November 2012, was shaped by the Alliance on Health Policy and Systems Research. The strategy explains how the evolving field of health policy and systems research (Box 2. As the first- ever global strategy in this area, it represents a milestone in the evolution of HPSR. First, it seeks to unify the worlds of research and decision-making and connect the various research disciplines that generate knowledge on health systems. Second, it contributes to a broader under- standing of the field by clarifying the scope and role of HPSR and providing insights into the dynamic processes through which HPSR evidence is generated and used in decision-making. Third, the strategy is intended to serve as an agent for change, advocating close collaboration between researchers and decision-makers as an alternative to working in parallel. The strategy document outlines several actions by which stakeholders can facilitate evidence-informed decision- making and strengthen health systems. Some of these actions are reflected in the main text of this chapter. These mutually complementary options support the embedding of research into decision-making processes and promote national and global investment in HPSR. National governments may choose to pursue some or all of these actions on the basis of their individual needs and available resources.