Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
1,606
result(s) for
"Leung, Wing"
Sort by:
Chronic oral administration of adipoRon reverses cognitive impairments and ameliorates neuropathology in an Alzheimer’s disease mouse model
Circulating adiponectin (APN) levels decrease with age and obesity. On the other hand, a reduction in APN levels is associated with neurodegeneration and neuroinflammation. We previously showed that aged adiponectin knockout (APN−/−) mice developed Alzheimer’s like pathologies, cerebral insulin resistance, and cognitive impairments. More recently, we also demonstrated that APN deficiency increased Aβ-induced microglia activation and neuroinflammatory responses in 5xFAD mice. There is compelling evidence that deregulated insulin activities or cerebral insulin resistance contributes to neuroinflammation and Alzheimer’s disease (AD) pathogenesis. Here, we demonstrated that APN levels were reduced in the brain of AD patients and 5xFAD mice. We crossbred 5xFAD mice with APN−/− mice to generate APN-deficient 5xFAD (5xFAD;APN−/−). APN deficiency in 5xFAD mice accelerated amyloid loading, increased cerebral amyloid angiopathy, and reduced insulin-signaling activities. Pharmacokinetics study demonstrated adipoRon (APN receptor agonist) was a blood–brain barrier penetrant. AdipoRon improved neuronal insulin-signaling activities and insulin sensitivity in vitro and in vivo. Chronic adipoRon treatment improved spatial memory functions and significantly rescued neuronal and synaptic loss in 5xFAD and 5xFAD;APN−/− mice. AdipoRon lowered plaque and Aβ levels in AD mice. AdipoRon also exerted anti-inflammatory effects by reducing microglial and astrocytes activation as well as suppressing cerebral cytokines levels. The microglial phagocytic activity toward Aβ was restored after adipoRon treatment. Our results indicated that adipoRon exerts multiple beneficial effects providing important therapeutic implications. We propose chronic adipoRon administration as a potential treatment for AD.
Journal Article
East Asian film stars
This book brings together some of the world's leading cinema scholars to offer their insights into the work of regional and transnational screen legends, contemporary superstars and mysterious cult personas. This collection of original essays will explore some of the most globally recognizable and popular, yet academically underexplored, film stars from Japan, Korea and Chinese language cinemas, placing them into their economic, cultural and social contexts, and discussing them in relation to notions of gender, ethnicity and identity. It offers an extension of star studies beyond its traditional geographical and cultural focus on Hollywood and European performers, exploring stardom across national and regional borders, and taking into account the increasingly important phenomenon of international co-productions and distribution that are aimed at diverse markets. This book traverses disciplinary boundaries and considers film stardom as part of ever-changing cultural practices and discourses -- from publisher.
Book
The relationship between social media use and psychosocial outcomes in older adults: A systematic review
ABSTRACTObjectivesSocial isolation and loneliness are prevalent in older adults and are detrimental to physical and mental health. Social media use has been shown to be effective in maintaining social connections and improving older adults’ psychosocial outcomes. This study aimed to systematically review and synthesize current research on this topic. DesignSearches were conducted in November 2021 (and updated in October 2023) in PsycINFO, PubMed, and CINAHL. Inclusion criteria: (1) participants ≥ 65 years (mean, median, or minimum age) and (2) reported impact of social media use on psychosocial outcomes (including loneliness, depression, anxiety, social connectedness, wellbeing, life satisfaction, and quality of life). Quality appraisal tools were utilized, and results were synthesized using narrative synthesis. ResultsSixty-four papers met inclusion criteria, including cross-sectional ( n = 38), observational longitudinal ( n = 6), interventional ( n = 9), mixed-methods ( n = 4), and qualitative ( n = 7) studies. Participant numbers ranged from 6 to 16,925. While associations between social media use and positive psychosocial outcomes were generally reported in cross-sectional studies, the impact of social media use over time from longitudinal studies was mixed and inconclusive. ConclusionsWhile social media use is associated with positive psychosocial outcomes, casual conclusions cannot be drawn. Few longitudinal and randomized controlled trial studies existed, and these reported mixed findings. Large variations in study methodology including participants, measurement of social media use, and outcome measures contributed to the inconsistencies of findings. Addressing this heterogeneity through standardized approaches and more rigorous research may enhance understanding.
Journal Article
Macbeth
Lush visuals illustrate the full original text of William Shakespeare's Macbeth, the tale of a nobleman inspired to commit treason and murder in pursuit of the Scottish throne.
Book
Prevalence and correlates of depression and anxiety in caregivers of children with attention-deficit/hyperactivity disorder during the fifth wave of COVID-19 and school closure in Hong Kong
Background
Caregivers of children with attention-deficit/hyperactivity disorder (ADHD) are vulnerable to increased psychological distress during COVID-19. However, specific pandemic- and child-related factors contributing to their poor mental health have not been fully investigated. We aimed to comprehensively examine prevalence and correlates of depression and anxiety among caregivers of ADHD children in Hong-Kong during the peak of fifth pandemic wave with territory-wide school closure.
Method
One-hundred-ninety-nine caregivers of ADHD children were assessed with self-rated questionnaires between 29 March–14 April, 2022. Questionnaires encompassed socio-demographics, pre-existing physical/psychiatric morbidity, COVID-19 related factors, children’s ADHD and other psychiatric symptoms. Caregivers’ psychological distress was quantified by Patient Health Questionnaire-9 (PHQ-9) and Generalized Anxiety Disorder Scale-7 (GAD-7). Caregivers who scored ≥ 10 in PHQ-9 and GAD-7 were classified as having probable depression and probable anxiety, respectively. Univariate and multivariate logistic regression analyses were conducted to identify correlates associated with caregivers’ probable depression and anxiety status.
Results
Forty-four (22.4%) and 33 (16.9%) caregivers had probable depression and anxiety, respectively. Multivariate regression analyses revealed that caregivers’ pre-existing mental disorder, greater COVID-19 stressor burden, and more severe emotional symptoms and insomnia of ADHD children were independently associated with both caregivers’ depression and anxiety status.
Conclusion
A significant proportion of caregivers of ADHD children experienced clinically-significant depressive and anxiety symptoms during the peak of fifth pandemic wave and school closure. Findings suggest that optimizing management of caregivers’ pre-existing mental health conditions, addressing emotional and sleep symptoms in ADHD children, and implementing strategies to alleviate pandemic-related stressors may reduce caregivers’ psychological distress.
Journal Article
Cell-cycle dynamics of chromosomal organization at single-cell resolution
Chromosomes in proliferating metazoan cells undergo marked structural metamorphoses every cell cycle, alternating between highly condensed mitotic structures that facilitate chromosome segregation, and decondensed interphase structures that accommodate transcription, gene silencing and DNA replication. Here we use single-cell Hi-C (high-resolution chromosome conformation capture) analysis to study chromosome conformations in thousands of individual cells, and discover a continuum of
cis
-interaction profiles that finely position individual cells along the cell cycle. We show that chromosomal compartments, topological-associated domains (TADs), contact insulation and long-range loops, all defined by bulk Hi-C maps, are governed by distinct cell-cycle dynamics. In particular, DNA replication correlates with a build-up of compartments and a reduction in TAD insulation, while loops are generally stable from G1 to S and G2 phase. Whole-genome three-dimensional structural models reveal a radial architecture of chromosomal compartments with distinct epigenomic signatures. Our single-cell data therefore allow re-interpretation of chromosome conformation maps through the prism of the cell cycle.
Single-cell Hi-C analysis in thousands of mouse embryonic stem cells shows that chromosomal compartments, topological-associated domains and long-range loops all have distinct cell-cycle dynamics.
Chromosomal organization dynamics
Eukaryotic chromosomes undergo a cycle of compaction and decondensation during the cell cycle. Here, Peter Fraser and colleagues have developed an improved single-cell Hi-C method to characterize the 3D organization of chromosomes through the cell cycle in thousands of individual mouse embryonic stem cells. They find that chromosomal compartments, topological-associated domains and loops are each governed by distinct dynamics and reveal a continuum of dynamic chromosomal structural features throughout the cell cycle. The results will be a new point of reference for interpreting chromosome conformation Hi-C maps.
Journal Article
Dimensions of Delusions and Attribution Biases along the Continuum of Psychosis
This study compared delusional dimensions and attribution biases along the continuum of psychosis. Participants completed questionnaires on delusion-like beliefs and attributions. Although patients with first-episode psychosis (N = 70) endorsed fewer delusion-like beliefs than non-clinical individuals with psychotic-like experiences (N = 12), they scored highest on delusional conviction, distress and preoccupation, followed by non-clinical individuals with psychotic-like experiences, and then healthy controls (N = 642). Self-serving bias was found in patients and non-clinical individuals with psychotic-like experiences, but not in healthy controls. Personalizing bias for negative events was not significantly different across the three groups. When compared with healthy controls, non-clinical individuals with psychotic-like experiences had an exaggerated self-serving bias, but were not more marked in personalizing bias. Self-serving bias and personalizing bias were both associated with delusional dimensions. However, the association between self-serving bias and number of delusion-like beliefs was stronger among patients than non-clinical participants. Future research could investigate the extent to which self-serving bias, in combination with an appraisal of delusional ideation as convincing, distress, and preoccupying, contributes to the development of clinical delusions.
Journal Article
Noninvasive Prenatal Diagnosis of Fetal Trisomy 18 and Trisomy 13 by Maternal Plasma DNA Sequencing
Massively parallel sequencing of DNA molecules in the plasma of pregnant women has been shown to allow accurate and noninvasive prenatal detection of fetal trisomy 21. However, whether the sequencing approach is as accurate for the noninvasive prenatal diagnosis of trisomy 13 and 18 is unclear due to the lack of data from a large sample set. We studied 392 pregnancies, among which 25 involved a trisomy 13 fetus and 37 involved a trisomy 18 fetus, by massively parallel sequencing. By using our previously reported standard z-score approach, we demonstrated that this approach could identify 36.0% and 73.0% of trisomy 13 and 18 at specificities of 92.4% and 97.2%, respectively. We aimed to improve the detection of trisomy 13 and 18 by using a non-repeat-masked reference human genome instead of a repeat-masked one to increase the number of aligned sequence reads for each sample. We then applied a bioinformatics approach to correct GC content bias in the sequencing data. With these measures, we detected all (25 out of 25) trisomy 13 fetuses at a specificity of 98.9% (261 out of 264 non-trisomy 13 cases), and 91.9% (34 out of 37) of the trisomy 18 fetuses at 98.0% specificity (247 out of 252 non-trisomy 18 cases). These data indicate that with appropriate bioinformatics analysis, noninvasive prenatal diagnosis of trisomy 13 and trisomy 18 by maternal plasma DNA sequencing is achievable.
Journal Article
The Role of microRNAs in Development of Colitis-Associated Colorectal Cancer
Colorectal cancer (CRC) is the third most deadly cancer worldwide, and inflammatory bowel disease (IBD) is one of the critical factors in CRC carcinogenesis. IBD is responsible for an unphysiological and sustained chronic inflammation environment favoring the transformation. MicroRNAs (miRNAs) belong to a class of highly conserved short single-stranded segments (18–25 nucleotides) non-coding RNA and have been extensively discussed in both CRC and IBD. However, the role of miRNAs in the development of colitis-associated CRC (CAC) is less clear. The aim of this review is to summarize the major upregulated (miR-18a, miR-19a, miR-21, miR-31, miR-155 and miR-214) and downregulated (miR-124, miR-193a-3p and miR-139-5p) miRNAs in CAC, and their roles in genes’ expression modulation in chronic colonic-inflammation-induced carcinogenesis, including programmed cell-death pathways. These miRNAs dysregulation could be applied for early CAC diagnosis, to predict therapy efficacy and for precision treatment.
Journal Article