Publications by authors named "Ma-Li Wong"

This review examines the longstanding debate of nature and intrauterine environmental challenges that shapes human development and behavior, with a special focus on the influence of maternal prenatal gut microbes. Recent research has revealed the critical role of the gut microbiome in human neurodevelopment, and evidence suggest that maternal microbiota can impact fetal gene and microenvironment composition, as well as immunophysiology and neurochemical responses. Furthermore, intrauterine neuroepigenetic regulation may be influenced by maternal microbiota, capable of having long-lasting effects on offspring behavior and cognition.

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Background: This scoping review aimed to characterise near-death experiences in the setting of cardiac arrest, a phenomenon that is poorly understood and may have clinical consequences.

Method: PubMed/MEDLINE was searched to 23 July 2023 for prospective studies describing near-death experiences in cardiac arrest. PRISMA-ScR guidelines were adhered to.

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Major depressive disorder represents a serious public health challenge worldwide; however, the underlying cellular and molecular mechanisms are mostly unknown. Here, we profile the dorsolateral prefrontal cortex of female cynomolgus macaques with social stress-associated depressive-like behaviors using single-nucleus RNA-sequencing and spatial transcriptomics. We find gene expression changes associated with depressive-like behaviors mostly in microglia, and we report a pro-inflammatory microglia subpopulation enriched in the depressive-like condition.

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Background: Depression is the leading cause of global disability and can develop following the change in body image and functional capacity associated with stoma surgery. However, reported prevalence across the literature is unknown. Accordingly, we performed a systematic review and meta-analysis aiming to characterise depressive symptoms after stoma surgery and potential predictive factors.

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In the aftermath of the COVID-19 pandemic, we are witnessing an unprecedented wave of post-infectious complications. Most prominently, millions of patients with Long-Covid complain about chronic fatigue and severe post-exertional malaise. Therapeutic apheresis has been suggested as an efficient treatment option for alleviating and mitigating symptoms in this desperate group of patients.

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In addition to their traditional roles in immune cell communication, cytokines regulate brain development. Cytokines are known to influence neural cell generation, differentiation, maturation, and survival. However, most work on the role of cytokines in brain development investigates rodents or focuses on prenatal events.

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Clinical and animal studies have shown that gut microbiome disturbances can affect neural function and behaviors via the microbiota-gut-brain axis, and may be implicated in the pathogenesis of several brain diseases. However, exactly how the gut microbiome modulates nervous system activity remains obscure. Here, using a single-cell nucleus sequencing approach, we sought to characterize the cell type-specific transcriptomic changes in the prefrontal cortex and hippocampus derived from germ-free (GF), specific pathogen free, and colonized-GF mice.

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Objective: This study aimed to explore the gender specificity of gut microbiome in patients with unipolar and bipolar depression disorder by analyzing the data of gut microbiome in this two mental disorders and healthy people.

Methods: A case-control study using 16S ribosomal RNA gene sequencing from fecal samples of MDD (male set, n = 43; female set, n = 77) and BD (male set, n = 82; female set, n = 83) compared with HCs (male set, n = 71; female set, n = 100) was conducted. Linear discriminant analysis was used to identify microbial characteristics.

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Article Synopsis
  • Synaptic dysfunction is linked to various neurological disorders, and understanding the regulatory factors behind these synaptic processes is challenging.
  • Researchers created a mutant mouse model lacking the PHD finger protein 21B (Phf21b) to investigate its function in the brain, which resulted in impaired social memory and reduced synaptic protein expression.
  • The study found that PHF21B interacts with specific histone modifications and transcription factors, highlighting its role in regulating synaptic plasticity genes, making it a potential target for treating neurobehavioral disorders.
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Article Synopsis
  • - The gut microbiome significantly impacts human mental health and neurophysiology, influencing the development of psychiatric conditions and the effectiveness of treatments.
  • - Research is shifting from merely identifying how gut bacteria relate to mental health issues to using this knowledge to enhance clinical practices.
  • - The review highlights advancements in understanding how gut microbiome affects the brain, along with the challenges of determining true causal relationships and offers a model for evaluating these interactions to improve disease risk assessment.
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Climate change represents a major global challenge. Some hallmarks of climate change that have been connected to human activity include an increase of 0.8-1.

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The neuropeptide oxytocin (OXT) is well recognized for eliciting anxiolytic effects and promoting social reward. However, emerging evidence shows that OXT increases aversive events. These seemingly inconsistent results may be attributable to the broad OXT receptor (OXTr) expression in the central nervous system.

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Article Synopsis
  • The study investigates how chronic alcohol exposure affects the GABA receptor (GABAR) dynamics in the brain, particularly focusing on the motor cortex in mice.
  • Results showed a decrease in GABAR-mediated currents and activity, linked to a specific site of dephosphorylation in GABA subunits, impacting their function.
  • Human studies corroborate these findings, revealing reduced cortical inhibition in individuals with alcohol use disorder (AUD), suggesting that enhancing GABAR signaling could explain baclofen's effectiveness in treating AUD.
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Gut microbiome disturbances have been implicated in major depressive disorder (MDD). However, little is known about how the gut virome, microbiome, and fecal metabolome change, and how they interact in MDD. Here, using whole-genome shotgun metagenomic and untargeted metabolomic methods, we identified 3 bacteriophages, 47 bacterial species, and 50 fecal metabolites showing notable differences in abundance between MDD patients and healthy controls (HCs).

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