Report on an open-label prospective study of divalproex sodium for the behavioral and psychological symptoms of dementia as monotherapy and in combination with second-generation antipsychotic medication

The effects of repetitive transcranial magnetic stimulation and aerobic exercise on cognition, balance and functional brain networks in patients with Alzheimer's disease

The purpose of this study was to investigate the effects of high-frequency repetitive Transcranial Magnetic Stimulation (rTMS) and aerobic exercises (AE) in addition to the pharmacological therapy (PT) in Alzheimer's Disease (AD). Twenty-seven patients with AD aged ≥ 60 years were included in the study and divided into 3 groups (rTMS, AE and control). All groups received PT. rTMS group (n = 10) received 20 Hz rTMS over dorsolateral prefrontal cortex (dlPFC) bilaterally and AE group (n = 9) received the structured moderate-intensity AE for 5 consecutive days/week over 2 weeks. Control group (n = 8) only received PT. Cognition, balance, mobility, quality of life (QoL), and resting state functional brain activity were evaluated one week before and one week after the interventions. (ClinicalTrials.gov ID:NCT05102045). Significant improvements were found in executive functions, behavior, and QoL in the rTMS group, in balance and mobility in the AE group, and in the visual memory and behavior in the control group (p < 0.05). Significant differences were found in the behavior in favor of the rTMS group, and balance in favor of the AE group (p < 0.05). There was a significant increase in activation on middle temporal gyrus, intra calcarine, central opercular cortex, superior parietal lobule, and paracingulate cortex in Default Mode Network (DMN) in the rTMS group (p < 0.05). High-frequency rTMS over bilateral dlPFC may improve executive functions and behavior and lead to increased activation in DMN, structured moderate-intensity AE may improve balance and mobility, and PT may improve memory and behaviour compared to pretreatment in AD.

Bipolar Disorder and Manic-Like Symptoms in Alzheimer's, Vascular and Frontotemporal Dementia: A Systematic Review

BACKGROUND

An increased risk of manic episodes has been reported in patients with neurodegenerative disorders, but the clinical features of bipolar disorder (BD) in different subtypes of dementia have not been thoroughly investigated.

OBJECTIVES

The main aim of this study is to systematically review clinical and therapeutic evidence about manic syndromes in patients with Alzheimer's disease (AD), vascular dementia (VaD), and frontotemporal dementia (FTD). Since manic-mixed episodes have been associated to negative outcomes in patients with dementia and often require medical intervention, we also critically summarized selected studies with relevance for the treatment of mania in patients with cognitive decline.

METHODS

A systematic review of the literature was conducted according to PRISMA guidelines. PubMed, Scopus, and Web of Science databases were searched up to February 2022. Sixty-one articles on patients with AD, VaD, or FTD and BD or (hypo) mania have been included.

RESULTS

Manic symptoms seem to be associated to disease progression in AD, have a greatly variable temporal relationship with cognitive decline in VaD, and frequently coincide with or precede cognitive impairment in FTD. Overall, mood stabilizers, and electroconvulsive therapy may be the most effective treatments, while the benefits of short-term treatment with antipsychotic agents must be balanced with the associated risks. Importantly, low-dose lithium salts may exert neuroprotective activity in patients with AD.

CONCLUSION

Prevalence, course, and characteristics of manic syndromes in patients with dementia may be differentially affected by the nature of the underlying neurodegenerative conditions.

Pharmacological and nonpharmacological approaches to reduce disinhibited behaviors in dementia: a systematic review

OBJECTIVES

Disinhibited behaviors in dementia are associated with multiple negative outcomes. However, effective interventions are under-researched. This systematic review aims to provide an overview of intervention studies that report outcome measures of disinhibited behaviors in dementia.

DESIGN

Systematic searches of the databases MEDLINE, EMBASE, and PsychINFO, Social Work Abstracts and Cochrane Central Register of Controlled Trial databases were conducted for publications published between 2002 and March 2020. We included hand-searched reviews, original articles, case reports, cohort studies, and randomized controlled trials (RCTs). All studies were rated for research quality. Statistical and clinical significance were considered for individual studies. Effect sizes were included where provided or calculated where possible. Mean effect sizes were calculated for RCTs only.

PARTICIPANTS

The systematic review included studies involving people living with dementia.

MEASUREMENTS

The Neuropsychiatric Inventory disinhibition subscale was used most often.

RESULTS

Nine pharmacological and 21 nonpharmacological intervention studies utilized different theoretical/clinical approaches. These included pain management, antidepressants, models of care, education and/or training, music-based approaches, and physical activity. The quality of research in RCTs was strong with a greater effect size in nonpharmacological compared to pharmacological approaches (mean Cohen's d = 0.49 and 0.27, respectively). Disinhibition was a secondary outcome in all studies.

CONCLUSION

Pharmacological (including pain management and antidepressants) and, more so, nonpharmacological (models of care, education/training, physical activity, and music) approaches were effective in reducing disinhibition.

Valproate in dementia: time to move on?

Baillonet al’s Cochrane review included 430 participants with agitation in dementia from five randomised controlled trials. Overall, the reviewers found that valproate was no better than placebo for the treatment of agitation in people with dementia; however, the quality of the studies included was very variable. Adverse effects and events were higher in the treatment group compared with the controls, although these finding were largely based on low-quality data with incomplete reporting; thus, valproate's safety profile is of concern. This review demonstrates that there is insufficient evidence to change current treatment guidelines.

DECLARATION OF INTEREST

None.

Valproate preparations for agitation in dementia

BACKGROUND

Agitation has been reported in up to 90% of people with dementia. Agitation in people with dementia worsens carer burden, increases the risk of injury, and adds to the need for institutionalisation. Valproate preparations have been used in an attempt to control agitation in dementia, but their safety and efficacy have been questioned.

OBJECTIVES

To determine the efficacy and adverse effects of valproate preparations used to treat agitation in people with dementia, including the impact on carers.

SEARCH METHODS

We searched ALOIS - the Cochrane Dementia and Cognitive Improvement Group's Specialized Register on 7 December 2017 using the terms: valproic OR valproate OR divalproex. ALOIS contains records from all major health care databases (the Cochrane Library, MEDLINE, Embase, PsycINFO, CINAHL, LILACS) as well as from many trials databases and grey literature sources.

SELECTION CRITERIA

Randomised, placebo-controlled trials that assessed valproate preparations for agitation in people with dementia.

DATA COLLECTION AND ANALYSIS

Two review authors independently screened the retrieved studies against the inclusion criteria and extracted data and assessed methodological quality of the included studies. If necessary, we contacted trial authors to ask for additional data, including relevant subscales, or for other missing information. We pooled data in meta-analyses where possible. This is an update of a Cochrane Review last published in 2009. We found no new studies for inclusion.

MAIN RESULTS

The review included five studies with 430 participants. Studies varied in the preparations of valproate, mean doses (480 mg/day to 1000 mg/day), duration of treatment (three weeks to six weeks), and outcome measures used. The studies were generally well conducted although some methodological information was missing and one study was at high risk of attrition bias.The quality of evidence related to our primary efficacy outcome of agitation varied from moderate to very low. We found moderate-quality evidence from two studies that measured behaviour with the total Brief Psychiatric Rating Scale (BPRS) score (range 0 to 108) and with the BPRS agitation factor (range 0 to 18). They found that there was probably little or no effect of valproate treatment over six weeks (total BPRS: mean difference (MD) 0.23, 95% confidence interval (CI) -2.14 to 2.59; 202 participants, 2 studies; BPRS agitation factor: MD -0.67, 95% CI -1.49 to 0.15; 202 participants, 2 studies). Very low-quality evidence from three studies which measured agitation with the Cohen-Mansfield Agitation Index (CMAI) were consistent with a lack of effect of valproate treatment on agitation. There was variable quality evidence on other behaviour outcomes reported in single studies of no difference between groups or a benefit for the placebo group.Three studies, which measured cognitive function using the Mini-Mental State Examination (MMSE), found little or no effect of valproate over six weeks, but we were uncertain about this result because the quality of the evidence was very low. Two studies that assessed functional ability using the Physical Self-Maintenance Scale (PSMS) (range 6 to 30) found that there was probably slightly worse function in the valproate-treated group, which was of uncertain clinical importance (MD 1.19, 95% CI 0.40 to 1.98; 203 participants, 2 studies; moderate-quality evidence).Analysis of adverse effects and serious adverse events (SAE) indicated a higher incidence in valproate-treated participants. A meta-analysis of three studies showed that there may have been a higher rate of adverse effects among valproate-treated participants than among controls (odds ratio (OR) 2.02, 95% CI 1.30 to 3.14; 381 participants, 3 studies, low-quality evidence). Pooled analysis of the number of SAE for the two studies that reported such data indicated that participants treated with valproate preparations were more likely to experience SAEs (OR 4.77, 95% CI 1.00 to 22.74; 228 participants, 2 studies), but the very low quality of the data made it difficult to draw any firm conclusions regarding SAEs. Individual adverse events that were more frequent in the valproate-treated group included sedation, gastrointestinal symptoms (nausea, vomiting, and diarrhoea), and urinary tract infections.

AUTHORS' CONCLUSIONS

This updated review corroborates earlier findings that valproate preparations are probably ineffective in treating agitation in people with dementia, but are associated with a higher rate of adverse effects, and possibly of SAEs. On the basis of this evidence, valproate therapy cannot be recommended for management of agitation in dementia. Further research may not be justified, particularly in light of the increased risk of adverse effects in this often frail group of people. Research would be better focused on effective non-pharmacological interventions for this patient group, or, for those situations where medication may be needed, further investigation of how to use other medications as effectively and safely as possible.

Dementia Care at End of Life: Current Approaches

PURPOSE OF REVIEW

Dementia is a progressive and life-limiting condition that can be described in three stages: early, middle, and late. This article reviews current literature on late-stage dementia.

RECENT FINDINGS

Survival times may vary across dementia subtypes. Yet, the overall trajectory is characterized by progressive decline until death. Ideally, as people with dementia approach the end of life, care should focus on comfort, dignity, and quality of life. However, barriers prevent optimal end-of-life care in the final stages of dementia. Improved and earlier advanced care planning for persons with dementia and their caregivers can help delineate goals of care and prepare for the inevitable complications of end-stage dementia. This allows for timely access to palliative and hospice care, which ultimately improves dementia end-of-life care.

Epigenetics-Based Therapeutics for Neurodegenerative Disorders

Epigenetic regulation, such as DNA methylation and histone modification, is implicated in the aberrant changes in gene expression that occur during the progression of neurodegeneration. Many epigenetics-based drugs have been developed recently for the treatment of some neurodegenerative disorders, including Alzheimer's, Parkinson's, and Huntington's diseases. Here we review recent studies that highlight the role of epigenetic modifications in neurodegeneration, among them DNA methylation and demethylation and histone acetylation and deacetylation; we also explore the possibility of using epigenetics-based therapeutics to treat neurodegenerative disorders.

Dosing of valproate in an elderly population with dementia: Evaluation of discontinuations and dose reductions

It is estimated that more than half of elderly patients with dementia will develop some degree of behavioral and psychological symptoms of dementia (BPSD). BPSD is associated with significant morbidity, rapid functional decline, and psychiatric hospitalization, and there are currently no medications approved by the Food and Drug Administration (FDA) for its treatment. One treatment option that has been evaluated is the antiepileptic drug valproate. This retrospective medical record review evaluated the tolerability of valproate in elderly patients with dementia. A total of 62 patients met inclusion criteria for this review, which sought to determine whether there was an association either between the initial valproate dose and discontinuation or dose reduction (DCDR) or the maximum valproate dose achieved and DCDR. Both the total daily dose and total daily dose in mg/kg were assessed. For both the maximum daily dose (OR 1.0; 95% CI 0.99, 1.01) and maximum daily mg/kg dose (OR =1.15; 95% CI 0.92, 1.49) there was also no association with DCDR. There was no associated risk of DCDR when evaluating initial daily doses (OR: 1.0; 95% CI: 0.99 – 1.01). However, an association between DCDR and initial daily mg/kg dose was found (OR: 1.92; 95% CI: 1.11–4.02). For both the initial dose and initial mg/kg dose model, African Americans were associated with the need for DCDR (OR 20.75; 95% CI: 1.77–660). Results from this study suggest that higher initial starting doses based on weight may lead to higher rates of side effects necessitating a discontinuation or dose reduction; however, large trials are needed to confirm these results.

Mood stabilizers for the treatment of behavioral and psychological symptoms of dementia: an update review

Behavioral and psychological symptoms of dementia (BPSD) are common and debilitating problems, but current treatments are limited. Antipsychotic agents show some efficacy on BPSD, but their use is limited by the associated risk of cerebrovascular events and mortality. Reports have shown the efficacy of mood stabilizers on BPSD, but systemic reviews on this issue are scant. This article aims to review studies of the efficacy of mood stabilizers on BPSD, and the quality of the available evidence. We searched for articles published in English during the period 1990 to 2010 and included in the PubMed database that concerned treatment of BPSD with mood stabilizers, such as carbamazepine, valproate, gabapentin, topiramate, lamotrigine, oxcarbazepine and lithium. The quality of the studies was assessed by considering the trial designs, analyses, subjects and results. We found one meta-analysis and three randomized controlled trials (RCTs) supporting the efficacy of carbamazepine in managing global BPSD, particularly aggression and hostility. With regard to valproate, current evidence from one meta-analysis and five RCTs did not strongly support its efficacy for global BPSD, including agitation and aggression. Only open trials or case series showed some efficacy of gabapentin, topiramate and lamotrigine in controlling BPSD. The single RCT investigating the effect of oxcarbazepine on agitation and aggression showed negative results. Case series reports on lithium tended to show it to be ineffective. Thus far, among mood stabilizers, carbamazepine has the most robust evidence of efficacy on BPSD. More RCTs are needed to strengthen evidence regarding the efficacy of gabapentin, topiramate and lamotrigine. Valproate, oxcarbazepine and lithium showed low or no evidence of efficacy. Large and well designed RCTs focusing on specific symptoms of BPSD are needed to deal with the issue.

Valproic acid in dementia: does an optimal dose exist?

Valproic acid is widely used in the treatment of behavioral disturbances in patients with dementia; however, there is uncertainty about its dosing and studies have reported mixed findings. The current article examines published trials of valproic acid in the treatment of patients with dementia to identify whether an optimal dosing strategy exists. Secondarily, valproic acid dosing from published studies is compared with a real-world 5-year sample of valproic acid prescribing. Twenty studies met selection criteria and were included in the review. Based primarily on uncontrolled trials and the current retrospective study, valproic acid serum levels between 40 and 60 mcg/mL and relatively low doses (ie, 7-12 mg/kg per d) are associated with improvements in agitation in some patients with dementia. At the same time, similar valproic acid levels produced no significant behavioral improvements in most placebo-controlled studies and led to substantial side effects in some patients. Considerable trial design differences exist between controlled and uncontrolled trials. Overall, valproic acid appears to have limited efficacy as monotherapy in many patients with dementia. Its optimal role may be in combination with other psychotropics as a treatment of agitation associated with dementia.

Pharmacology of epigenetics in brain disorders

Epigenetics is a rapidly growing field and holds great promise for a range of human diseases, including brain disorders such as Rett syndrome, anxiety and depressive disorders, schizophrenia, Alzheimer disease and Huntington disease. This review is concerned with the pharmacology of epigenetics to treat disorders of the epigenome whether induced developmentally or manifested/acquired later in life. In particular, we will focus on brain disorders and their treatment by drugs that modify the epigenome. While the use of DNA methyl transferase inhibitors and histone deacetylase inhibitors in in vitro and in vivo models have demonstrated improvements in disease-related deficits, clinical trials in humans have been less promising. We will address recent advances in our understanding of the complexity of the epigenome with its many molecular players, and discuss evidence for a compromised epigenome in the context of an ageing or diseased brain. We will also draw on examples of species differences that may exist between humans and model systems, emphasizing the need for more robust pre-clinical testing. Finally, we will discuss fundamental issues to be considered in study design when targeting the epigenome.

Treatment-resistant bipolar depression: towards a new definition

OBJECTIVE

To summarize the conceptual and operational definitions of treatment-resistant bipolar depression and to review the evidence-based therapeutic options.

METHOD

Structured searches of PubMed, Index Medicus, Excerpta Medica and Psyclit conducted in December 2008.

RESULTS

Criteria for treatment resistance in bipolar depression are commonly based on concepts stemming from treatment resistance as defined for unipolar depression, an approach that proved to be inadequate. In fact, the addition of an ad hoc criterion based on lithium and other mood stabilizer unresponsiveness after reaching adequate plasma levels appears to be a patch that attempts to take into account the uniqueness of bipolar depression but fails to become operational. Recent data from randomized clinical trials of new anticonvulsants and second-generation antipsychotics should lead to the development of a modern definition of treatment-resistant bipolar depression, and specific therapeutic algorithms.

CONCLUSION

We suggest a redefinition of resistant bipolar I and II depression. We propose different degrees of severity within bipolar depression in a stepwise manner.

Valproate preparations for agitation in dementia

BACKGROUND

Agitation affects up to 70% of older people with dementia. Valproic acid derivatives have been used for the past 10 years to control agitation in dementia, but no systematic review of the effectiveness of this treatment has been published to date. A systematic review of 2004 examined three randomised, placebo-controlled trials of the effect of valproate therapy on older people with dementia who were agitated. The review was updated (October 2008) to include two additional studies.

OBJECTIVES

To determine whether evidence supports the use of valproate preparations in the treatment of agitation of people with dementia.

SEARCH STRATEGY

The Specialized Register of the Cochrane Dementia and Cognitive Improvement Group (CDCIG), The Cochrane Library, MEDLINE, EMBASE, PsycINFO, CINAHL and LILACS were searched on 7 February 2008 using the terms: valproic OR valproate OR divalproex* . The CDCIG Specialized Register contains records from all major health care databases (The Cochrane Library, MEDLINE, EMBASE, PsycINFO, CINAHL, LILACS) as well as from many trials databases and grey literature sources.

SELECTION CRITERIA

Randomized, placebo-controlled trials with concealed allocation where agitation and dementia of participants were assessed

DATA COLLECTION AND ANALYSIS

1. Two reviewers extracted data from published trials 2. Odds ratios of average differences were calculated 3. Only "intention to treat" analyses were included 4. Analysis compared participants treated with valproic acid with controls

MAIN RESULTS

Meta-analysis in 2004 of the pooled results was limited because of the following problems.In Porsteinsson 2001, although the physicians having direct responsibility for patient care were blinded, a non-blinded physician, who had no direct contact with these physicians, adjusted divalproex sodium dosage on the basis of reports from blinded raters and from confidential laboratory reports. Therefore, because the physician who controlled therapy knew which patients were receiving divalproex, the trial did not satisfy the criterion of concealed allocation.In Tariot 2001, 54% of the treated patients dropped out compared with 29% of control patients. Of all treated patients, 22% dropped out because of adverse effects, and the study had to be discontinued prematurely.The third trial (Sival 2002) had a cross-over design. No results from the first phase of the study were available, and although the statistical section stated, "the t-test for independent samples is used to analyse the two-period cross-over trial", because the samples were not independent - they are the same patients in the treatment and placebo groups - a question must be raised about the correctness of the analyses.The valproate preparation used in the trials varied - one used short-acting sodium valproate, one long-acting divalproex sodium, and the third early-onset acting divalproex sodium. Average doses differed (480 mg/d - 1000 mg/d), as did duration of therapy (3 weeks - 6 weeks), and ways of evaluating patients and their response to therapy.A limited meta-analysis, pooling the results concerning adverse effects (Porsteinsson 2001, Tariot 2001) revealed the following: sedation occurred more frequently in patients treated with valproic acid than in controls. Urinary tract infection was more common among patients treated with valproic acid than controls.An updated systematic review (October 2008) of two new studies (Tariot 2005, Herrmann 2007) applied meta-analysis to the effect of valproate on agitation in demented patients and also combined these studies with the earlier reports to examine adverse effects among valproate treated patients. Because the study of Herrmann et al involved a cross-over design, only those results from the first part of this study were included in the updated review.The new meta-analysis of pooled results showed no improvement of agitation among valproate treated patients, compared with controls, and showed an increase in adverse events (falls, infection, gastrointestinal disorders) among valproate treated patients.

AUTHORS' CONCLUSIONS

The updated review corroborates the earlier findings that valproate preparations are ineffective in treating agitation among demented patients, and that valproate therapy is associated with an unacceptable rate of adverse effects. More research on the use of valproate preparations for agitation of people with dementia is needed. On the basis of current evidence, valproate therapy cannot be recommended for management of agitation in dementia.

Anticonvulsants in the treatment of aggression in the demented elderly: an update

INTRODUCTION

Complex psychopathological and behavioral symptoms, such as delusions and aggression against care providers, are often the primary cause of acute hospital admissions of elderly patients to emergency units and psychiatric departments. This issue resembles an interdisciplinary clinically highly relevant diagnostic and therapeutic challenge across many medical subjects and general practice. At least 50% of the dramatically growing number of patients with dementia exerts aggressive and agitated symptoms during the course of clinical progression, particularly at moderate clinical severity.

METHODS

Commonly used rating scales for agitation and aggression are reviewed and discussed. Furthermore, we focus in this article on benefits and limitations of all available data of anticonvulsants published in this specific indication, such as valproate, carbamazepine, oxcarbazepine, lamotrigine, gabapentin and topiramate.

RESULTS

To date, most positive and robust data are available for carbamazepine, however, pharmacokinetic interactions with secondary enzyme induction limit its use. Controlled data of valproate do not seem to support the use in this population. For oxcarbazepine only one controlled but negative trial is available. Positive small series and case reports have been reported for lamotrigine, gabapentin and topiramate.

CONCLUSION

So far, data of anticonvulsants in demented patients with behavioral disturbances are not convincing. Controlled clinical trials using specific, valid and psychometrically sound instruments of newer anticonvulsants with a better tolerability profile are mandatory to verify whether they can contribute as treatment option in this indication.

Alternatives to atypical antipsychotics for the management of dementia-related agitation

Numerous recent studies have challenged the widely held belief that atypical antipsychotics are safe and effective options for the treatment of behavioural problems such as agitation in patients with dementia. Accordingly, there is a need to reconsider the place of atypical antipsychotics in the treatment of patients with dementia. The present article is intended to assist clinicians with the assessment and pharmacological management of agitation in patients with dementia. We review the risk-benefit evidence for the use of atypical antipsychotics in patients with dementia-related agitation (DRA). Emerging evidence indicates that, for patients with dementia, the risks associated with atypical antipsychotics may outweigh the benefits except for patients with severe agitation who require short-term chemical restraint. We then discuss the importance of a careful assessment to rule out potentially reversible factors contributing to DRA. Finally, we summarize the evidence supporting the use of medications other than antipsychotics to treat DRA. There is wide variability in the levels of evidence supporting the use of non-antipsychotic medication for the treatment of DRA. The best evidence currently exists for cholinesterase inhibitors and serotonin-specific reuptake inhibitor antidepressants. Emerging reports suggest that numerous other medications, for example, antiepileptics, lithium, anxiolytics, analgesics, beta-adrenoceptor antagonists, cannabinoid receptor agonists and hormonal agents, may prove to be viable alternatives to antipsychotics for the treatment of severe DRA and more research is urgently needed to help assess the effectiveness of these agents. A comprehensive biopsychosocial assessment and treatment plan is likely the most effective way to manage DRA.