Publications by authors named "Amanda Liu"

Background: Glaucoma patients with irreversible visual field loss often experience decreased quality of life, impaired mobility, and mental health challenges. Perceptual learning (PL) and transcranial electrical stimulation (tES) have emerged as promising interventions for vision rehabilitation, showing potential in restoring residual visual functions. The Glaucoma Rehabilitation using ElectricAI Transcranial stimulation (GREAT) project aims to investigate whether combining PL and tES is more effective than using either method alone in maximizing the visual function of glaucoma patients.

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Background: Nusinersen treatment has demonstrated efficacy in improving clinical outcomes for spinal muscular atrophy (SMA), yet its impact on scoliosis progression remains unclear.

Objective: This study aimed to assess the progression of scoliosis in pediatric patients with SMA undergoing nusinersen treatment.

Methods: In this prospective study, data were systematically collected from Hong Kong pediatric SMA patients receiving nusinersen between 2018 and 2023.

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Background: Premature infants are at risk for multiple types of intracranial injury with potentially significant long-term neurological impact. The number of screening head ultrasounds needed to detect such injuries remains controversial.

Objective: To determine the rate of abnormal findings on routine follow-up head ultrasound (US) performed in infants born at ≤ 32 weeks' gestational age (GA) after initial normal screening US.

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Phenotypic heterogeneity in cancer is often caused by different patterns of genetic alterations. Understanding such phenotype-genotype relationships is fundamental for the advance of personalized medicine. We develop a computational method, named NETPHIX (NETwork-to-PHenotype association with eXclusivity) to identify subnetworks of genes whose genetic alterations are associated with drug response or other continuous cancer phenotypes.

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The lack of mandated folate enrichment of gluten-free (GF) grains in Canada has been suspected to contribute to suboptimal folate intake among children suffering from Celiac disease (CD). Children with CD on the gluten-free diet (GFD) face nutrient imbalances (higher fat/sugar, lower folate) from processed GF foods. The study objective examined folate intake in children with CD and folate content of household food purchases.

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Introduction: Celiac disease (CD) is an autoimmune disease requiring lifelong adherence to the gluten-free diet (GFD). The GFD has significant nutritional limitations which may result in poor diet quality (DQ). We hypothesized that biopsy-proven children with CD (CCD) would have dietary patterns characterized by high saturated fat/simple sugar intake with a low micronutrient density contributing to lower DQ when compared to children with mild-gastrointestinal complaints (GI-CON).

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Study Objective: Radiology-performed transabdominal pelvic ultrasound, used to evaluate female patients with suspected pelvic pathology in the pediatric emergency department (ED), is often delayed by the need to fill the bladder. We seek to determine whether point-of-care ultrasound assessment of bladder fullness can predict patient readiness for transabdominal pelvic ultrasound more quickly than patient sensation of bladder fullness.

Methods: We performed a randomized controlled trial of female patients aged 8 to 18 years who required transabdominal pelvic ultrasound in a pediatric ED.

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The study purpose was to describe dietary intake and the factors influencing micronutrient supplements (MS) use in Celiac Disease (CD) ± Type 1 Diabetes (T1D). Three-day food records collected from parents of youth (3-18 years) with CD (n = 14) ± T1D (n = 10) were assessed for macro and micronutrient intake, diet quality (DQ), glycemic index (GI), glycemic load (GL), and food group intake. Focus group methodology and thematic concept analysis were conducted to determine factors influencing adolescent MS use.

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Objectives: Celiac disease (CD) is an autoimmune disease that requires lifelong adherence to a gluten-free diet (GFD). Adherence to the GFD in childhood may be poor and adversely influence health-related quality of life (HRQOL). The study purpose was to determine sociodemographic and socioeconomic factors influencing adherence to the GFD and HRQOL in a multiethnic cohort of youth with CD.

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Evolutionary relationships may exist among very diverse groups of proteins even though they perform different functions and display little sequence similarity. The tailed bacteriophages present a uniquely amenable system for identifying such groups because of their huge diversity yet conserved genome structures. In this work, we used structural, functional, and genomic context comparisons to conclude that the head-tail connector protein and tail tube protein of bacteriophage lambda diverged from a common ancestral protein.

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The tail terminator protein (TrP) plays an essential role in phage tail assembly by capping the rapidly polymerizing tail once it has reached its requisite length and serving as the interaction surface for phage heads. Here, we present the 2.7-A crystal structure of a hexameric ring of gpU, the TrP of phage lambda.

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During the late stages of lambda bacteriophage assembly, the protein gpU terminates tail polymerization and participates at the interface between the mature capsid and tail components. When it engages the lambda tail, gpU undergoes a monomer-hexamer transition to achieve its biologically active form. Towards understanding how gpU participates in multiple protein-protein interactions, we have solved the structure of gpU in its monomeric state using NMR methods.

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