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  1. Lactobacillus paracasei PS23 reduced early-life stress abnormalities in maternal separation mouse model
    Liao JF, Hsu CC, Chou GT, Hsu JS, Liong MT, Tsai YC
    Benef Microbes, 2019 Apr 19;10(4):425-436.
    PMID: 30882243 DOI: 10.3920/BM2018.0077
    Maternal separation (MS) has been developed as a model for inducing stress and depression in studies using rodents. The concept of the gut-brain axis suggests that gut health is essential for brain health. Here, we present the effects of administration of a probiotic, Lactobacillus paracasei PS23 (PS23), to MS mice against psychological traits including anxiety and depression. The administration of live and heat-killed PS23 cells showed positive behavioural effects on MS animals, where exploratory tendencies and mobility were increased in behavioural tests, indicating reduced anxiety and depression compared to the negative control mice (P<0.05). Mice administered with both live and heat-killed PS23 cells also showed lower serum corticosterone levels accompanied by higher serum anti-inflammatory interleukin 10 (IL-10) levels, compared to MS separated mice (P<0.05), indicating a stress-elicited response affiliated with increased immunomodulatory properties. Assessment of neurotransmitters in the brain hippocampal region revealed that PS23 affected the concentrations of dopaminergic metabolites differently than the control, suggesting that PS23 may have improved MS-induced stress levels via neurotransmitter pathways, such as dopamine or other mechanisms not addressed in the current study. Our study illustrates the potential of a probiotic in reversing abnormalities induced by early life stress and could be an alternative for brain health along the gut-brain axis.
  2. Exome Sequencing Identifies Population-Specific Genetic Risk Factors for Progressive Supranuclear Palsy in Asia
    Chen PS, Lin RJ, Chen HY, Cheng L, Hung MZ, Lee NC, et al.
    Mov Disord, 2026 Nov 01.
    PMID: 42967813 DOI: 10.1002/mds.70595
    BACKGROUND: Progressive supranuclear palsy (PSP) is a debilitating primary tauopathy. Although genome-wide association studies have identified risk loci in European populations, the genetic architecture of PSP in Asia remains largely undefined.

    OBJECTIVES: We aimed to identify population-specific genetic risk factors in Asian patients with PSP.

    METHODS: We performed whole-exome sequencing in 549 patients with PSP recruited across East and Southeast Asia. Variant frequencies were compared with 1492 whole-genome-sequenced controls from the Taiwan Biobank. Novel variants were functionally evaluated using cellular and Drosophila models.

    RESULTS: Among 549 patients (mean age at onset 65.1 ± 7.4 years; 60.47% male), 29 (5.28%) carried heterozygous pathogenic or likely pathogenic variants, including 12 novel variants. Additionally, 127 patients (23.13%) harbored 144 rare variants of uncertain significance with minor allele frequency 

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