CNS drugs最新文献

Background: Raynaud syndrome (RS) is a peripheral vasculopathy characterised be impaired acral perfusion typically manifesting as skin discolouration with pallor, cyanosis and/or erythema, and increased sensitivity to cold. RS may be primary or secondary to systemic disease, lifestyle and environmental factors or medication. RS has been reported with medication to treat ADHD, but we found no recent comprehensive overview of the literature. The aim of this review is to evaluate the evidence in the published literature for Raynaud syndrome associated with medication for ADHD.

Methods: We systematically searched PubMed and Embase from inception to 12 June 2024 for articles published in English describing cases of RS in individuals treated with stimulant medication, atomoxetine, guanfacine or clonidine. Identified cases were assessed against the Naranjo Adverse Drug Reaction Scale criteria to determine the probability of a causal relationship with the medication.

Results: The initial search identified 197 articles. A total of 61 cases were identified from 15 case reports, 5 case series, 1 retrospective case-control study, and 1 retrospective cohort study. No randomised, controlled studies were identified. Implicated medications included methylphenidate, (dex)amfetamine and, more rarely, atomoxetine. Most cases were mild and resolved within weeks of discontinuation, dose reduction or switch to an alternative medication. A few cases associated with systemic disease were reported, leading to ulceration, gangrene and the need for amputation or revascularisation in some individuals. Assessment of 28 cases using the Naranjo criteria suggested a 'possible' causative role of ADHD medication in 13 cases, a 'probable' role in 13 cases and a 'definite' role in two cases.

Conclusions: Due to the uncontrolled nature of all but one of the available studies, a causal relationship between medication for ADHD and RS could not be determined reliably. However, in view of the possibility of severe sequelae, albeit in rare cases, routine monitoring for signs of RS is recommended in individuals treated with CNS stimulants or atomoxetine, especially when initiating treatment or increasing the dose. Large database studies in which individuals act as their own controls should be conducted to clarify any association between treatment with these medications and RS, controlling for confounding factors.

Voltage-gated Kv7 potassium channels, particularly Kv7.2 and Kv.7.3 channels, play a critical role in modulating susceptibility to seizures, and mutations in genes that encode these channels cause heterogeneous epilepsy phenotypes. On the basis of this evidence, activation of Kv7.2 and Kv.7.3 channels has long been considered an attractive target in the search for novel antiseizure medications. Ezogabine (retigabine), the first Kv7.2/3 activator introduced in 2011 for the treatment of focal seizures, was withdrawn from the market in 2017 due to declining use after discovery of its association with pigmentation changes in the retina, skin, and mucosae. A novel formulation of ezogabine for pediatric use (XEN496) has been recently investigated in children with KCNQ2-related developmental and epileptic encephalopathy, but the trial was terminated prematurely for reasons unrelated to safety. Among novel Kv7.2/3 openers in clinical development, azetukalner has shown dose-dependent efficacy against drug-resistant focal seizures with a good tolerability profile and no evidence of pigmentation-related adverse effects in early clinical studies, and it is now under investigation in phase III trials for the treatment of focal seizures, generalized tonic-clonic seizures, and major depressive disorder. Another Kv7.2/3 activator, BHV-7000, has completed phase I studies in healthy subjects, with excellent tolerability at plasma drug concentrations that exceed the median effective concentrations in a preclinical model of anticonvulsant activity, but no efficacy data in patients with epilepsy are available to date. Among other Kv7.2/3 activators in clinical development as potential antiseizure medications, pynegabine and CB-003 have completed phase I safety and pharmacokinetic studies, but results have not been yet reported. Overall, interest in targeting Kv7 channels for the treatment of epilepsy and for other indications remains strong. Future breakthroughs in this area could come from exploitation of mechanistic differences in the action of Kv7 activators, and from the development of molecules that combine Kv7 activation with other mechanisms of action.

The negative symptoms of schizophrenia include diminished emotional expression, avolition, alogia, anhedonia, and asociality, and due to their low responsiveness to available treatments, are a primary driver of functional disability in schizophrenia. This narrative review has the aim of providing a comprehensive overview of the current research developments in the treatment of negative symptoms in schizophrenia, and begins by introducing the concepts of primary, secondary, prominent, predominant, and broadly defined negative symptoms. We then compare and contrast commonly used research assessment scales for negative symptoms and review the evidence for the specific utility of widely available off-label and investigational treatments that have been studied for negative symptoms. Mechanism of action/putative treatments included are antipsychotics (D₂R antagonists), N-methyl-D-aspartate receptor (NMDAR) and other glutamatergic modulators, serotonin receptor (5-HTR) modulators, anti-inflammatory agents, antidepressants, pro-dopaminergic modulators (non-D₂R antagonists), acetylcholine modulators, oxytocin, and phosphodiesterase (PDE) inhibitors. With the caveat that no compounds are definitively proven as gold-standard treatments for broadly defined negative symptoms, the evidence base supports several potentially beneficial off-label and investigational medications for treating negative symptoms in schizophrenia, such as monotherapy with cariprazine, olanzapine, clozapine, and amisulpride, or adjunctive use of memantine, setrons such as ondansetron, minocycline, and antidepressants. These medications are widely available worldwide, generally tolerable and could be considered for an off-label, time-limited trial for a predesignated period of time, after which a decision to switch or stay can be made based on clinical response. Among investigational medications, NMDAR agonists, muscarinic agonists, and LB-102 remain under study. Suggestions for future research include reducing placebo effects by designing studies with a smaller number of high-quality study sites, potentially increasing the use of more precise rating scales for negative symptoms, and focused studies in people with predominant negative symptoms.

Background: Epstein-Barr virus (EBV) is implicated as a necessary factor in the development of multiple sclerosis (MS) and may also be a driver of disease activity. Although it is not clear whether ongoing viral replication is the driver for MS pathology, MS researchers have considered the prospect of using drugs with potential efficacy against EBV in the treatment of MS. We have undertaken scientific and lived experience expert panel reviews to shortlist existing licensed therapies that could be used in later-stage clinical trials in MS.

Methods: A list of therapies with anti-EBV effects was developed from existing reviews. A detailed review of pre-clinical and clinical data was undertaken to assess these candidates for potential usefulness and possible harm in MS. A 'drug-CV' and a plain language version focusing on tolerability aspects was created for each candidate. We used validated criteria to score each candidate with an international scientific panel and people living with MS.

Results: A preliminary list of 11 drug candidates was generated. Following review by the scientific and lived experience expert panels, six yielded the same highest score. A further review by the expert panel shortlisted four drugs (famciclovir, tenofovir alafenamide, maribavir and spironolactone) deemed to have the best balance of efficacy, safety and tolerability for use in MS.

Conclusions: Scientific and lived experience expert panel review of anti-EBV therapies selected four candidates with evidence for efficacy against EBV and acceptable safety and tolerability for potential use in phase III clinical trials for MS.

Background: A network meta-analysis was performed to evaluate the risk of congenital malformations and other prenatal outcomes in fetuses after exposure to antipsychotic medications and mood stabilizers during pregnancy.

Methods: We searched the PubMed, EMBASE, and Cochrane CENTRAL databases up to 15 December 2023, to identify experimental and observational studies comparing antipsychotic and mood stabilizer treatments with control treatments (no exposure). The primary outcome of the study was the incidence of congenital malformations and the secondary outcomes were preterm birth and spontaneous abortion. Additionally, two authors independently assessed the risk of bias in each domain of the included studies using the ROBINS-I tool and evaluated the quality of evidence using the CINeMA rating tool.

Results: The literature search identified 18,334 potential records, and 22 studies involving 3,042,997 pregnant women were ultimately included. Compared with the unexposed group, quetiapine [odds ratio (OR), 1.19; 95% credible interval (CrI), 1.01-1.39], aripiprazole (OR, 1.30; 95% CrI 1.10-1.65), olanzapine (OR, 1.33; 95% CrI 1.11-1.64), risperidone (OR, 1.43; 95% CrI 1.18-1.77), and lithium (OR, 1.61; 95% CrI 1.07-2.30) were associated with a slightly increased risk of congenital malformations. In contrast, lamotrigine (OR, 1.21; 95% CrI 0.86-1.64), ziprasidone (OR, 1.14; 95% CrI 0.73-1.72), and haloperidol (OR, 1.26; 95% CrI 0.90-1.75) did not show significant differences compared with the unexposed group, with narrower credible intervals.

Conclusions: The evidence from this analysis suggests that, overall, quetiapine has the lowest teratogenic risk when used during pregnancy, making it the safer option for pregnant women. Lamotrigine and haloperidol follow closely behind. At the same time, the use of lurasidone and ziprasidone should be approached with caution, and further clinical studies are necessary to better assess their safety.

Systematic review registration: PROSPERO CRD4201811373.

Background and objective: Alcohol pharmacotherapies pose unknown teratogenic risks in pregnancy and are therefore recommended to be avoided. This limits treatment options for pregnant individuals with alcohol use disorders (AUD). The information on the safety of these medications during pregnancy is uncertain, prompting a scoping review. The objective of this review was to investigate available information on the safety of alcohol pharmacotherapies in pregnancy.

Methods: Studies published between January 1990 and July 2023 were identified through searches in BIOSIS, Embase, PsycINFO and MEDLINE databases, using terms related to pregnancy and alcohol pharmacotherapies. The alcohol pharmacotherapies investigated were naltrexone, acamprosate, disulfiram, nalmefene, baclofen, gabapentin and topiramate. Studies were screened by two independent reviewers. Covidence software facilitated the management, screening and extraction of studies.

Results: A total of 105 studies were included in the review (naltrexone: 21, acamprosate: 4, disulfiram: 3, baclofen: 3, nalmefene: 0, topiramate: 55, gabapentin: 32) with some studies investigating multiple medications. Studies investigating naltrexone's safety in pregnancy focussed on opioid use disorders, with limited evidence regarding its safety in the context of AUD. Despite concerns about higher rates of some pregnancy complications, studies generally indicate naltrexone as a safer option compared with opioid agonists or alcohol during pregnancy. Acamprosate was not clearly associated with adverse effects of exposure in pregnancy, with two pre-clinical studies suggesting potential neuroprotective properties. Disulfiram has a high risk of congenital anomalies when used in pregnancy, believed to be due to its mechanism of action. Prenatal topiramate has also been associated with an increased risk of congenital anomalies, particularly oral clefts. There were mixed results concerning the safety of prenatal gabapentin and little to no literature investigating the safety of baclofen or nalmefene during pregnancy.

Conclusions: There is insufficient research on the safety of alcohol pharmacotherapies in pregnancy. Despite this, given alcohol's teratogenic effects, naltrexone could be considered to help maintain abstinence in pregnant individuals with AUD, particularly when psychosocial treatments have failed.

Multiple sclerosis (MS) is a chronic immune-mediated disease of the central nervous system characterised by inflammation, demyelination and neurodegeneration. Although several drugs are approved for MS, their efficacy in progressive disease is modest. Addressing disease progression as a treatment goal in MS is challenging due to several factors. These include a lack of complete understanding of the pathophysiological mechanisms driving MS and the absence of sensitive markers of disease progression in the short-term of clinical trials. MS usually begins at a young age and lasts for decades, whereas clinical research often spans only 1-3 years. Additionally, there is no unifying definition of disease progression. Several drugs are currently being investigated for progressive MS. In addition to new medications, the rise of new technologies and of adaptive trial designs is enabling larger and more integrated data collection. Remote assessments and decentralised clinical trials are becoming feasible. These will allow more efficient and large studies at a lower cost and with less burden on study participants. As new drugs are developed and research evolves, we anticipate a concurrent change in patient care at various levels in the foreseeable future. We conducted a narrative review to discuss the challenges of accurately measuring disease progression in contemporary MS drug trials, some new research trends and their implications for patient care.