Publications by authors named "Margaret Wallen"

Introduction: Participatory methods like experience-based co-design (EBCD) can be used to develop complex interventions, but may need adaptations when co-designers include young people with disability, parents and community partners. We aimed to adapt EBCD through co-production by involving people with lived experience of disability as co-researchers. This paper reports the co-produced protocol and reflects on co-researchers' contributions.

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Aim: To identify developmental trajectories of impaired hand function in infants aged 3 to 15 months with unilateral cerebral palsy (CP).

Method: Sixty-three infants (37 male; median gestational age 37 weeks [interquartile range 30-39.1 weeks]) recruited as part of a randomized trial with a confirmed diagnosis of unilateral CP were included.

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Aim: To synthesize the experiences of 15- to 34-year-olds with cerebral palsy (CP) as they participate in key life situations of young adulthood.

Method: A mixed-methods scoping review was undertaken and six electronic databases searched (January 2001 to August 2023). Participation foci and thematic outcomes were mapped to the International Classification of Functioning, Disability and Health.

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Guidelines for implementation of eye-gaze control technology by people with cerebral palsy were published in 2021. The purpose of this study was to identify barriers and facilitators clinicians perceive exist relating to use of these guidelines for eye-gaze control technology, and to explore potential resources that may be developed to support their implementation. A two-phased mixed methods explanatory sequential design was adopted.

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Article Synopsis
  • The study aimed to compare the effectiveness of constraint-induced movement therapy (Baby-CIMT) and bimanual therapy (Baby-BIM) in infants at high risk for unilateral cerebral palsy.
  • A total of 96 infants were randomly assigned to either therapy group, with both interventions yielding significant improvements in hand development, though neither was found to be superior to the other.
  • Infants starting therapy before 6 months of corrected age showed greater enhancements in hand function compared to those who began later, indicating the importance of early intervention.
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Purpose: Pathways and Resources for Engagement and Participation (PREP) is an intervention to optimise individuals' participation by building problem-solving capacity and addressing environmental barriers. We investigated the feasibility of implementing PREP with young adults (18-30 years) with complex disability in Australia.

Materials And Methods: Explanatory sequential mixed methods study in three stages.

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Purpose: To explore the perspectives of primary caregivers of children with cerebral palsy (CP) who had spinal surgery for scoliosis.

Materials And Methods: A qualitative study was conducted using semi-structured interviews and guided by qualitative description methodology. Participants were caregivers of children with CP aged 5-18, who had undergone spinal surgery for scoliosis in Australia.

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  • Gene therapy has struggled to gain traction in treating various diseases over the past 30 years due to challenges in effectively delivering therapeutic nucleic acids to their targets.
  • * The limitations of current plasmid DNA delivery methods, including naked pDNA and nanoparticles, have prompted the search for more efficient systems that minimize side effects and maximize efficacy.
  • * This review focuses on using exosomes derived from bovine milk and colostrum as a promising delivery platform for plasmid DNA in gene therapy, highlighting their scalability, cost-effectiveness, and ability to target multiple tissues.
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Article Synopsis
  • - Chemotherapy remains a key treatment for various cancers but often causes severe side effects and compromises patients' quality of life; new methods for drug delivery, such as nanoparticles and liposomes, have seen limited success due to various challenges.
  • - Exosomes, particularly those derived from bovine milk, offer a promising alternative for delivering cancer treatments, as they can be engineered for targeted delivery and help reduce toxicity while enhancing drug efficacy.
  • - The article reviews studies on exosomal delivery systems, particularly for small molecules and biologics like siRNA, highlighting the benefits of milk exosomes but also emphasizing the need for further research on their safety and effectiveness compared to existing nanoformulations.
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Purpose: Investigate the effect of exercise for adults with cerebral palsy (CP) on quality of life, participation (attendance and involvement in life situations), functional mobility, pain, fatigue, mood, and self-efficacy.

Methods: A systematic review was completed. Twelve databases were searched from inception to August 2022 for studies including participants (≥16 years) with cerebral palsy, and that evaluated an exercise intervention.

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Aim: To review the evidence for the effects of adapted bicycle riding on body structures and functions, activity, participation, and quality of life outcomes in children with disabilities, along with family-level participation outcomes.

Method: A systematic review with searches of nine electronic databases to identify studies involving participants with a developmental disability aged 4 to 18 years who used a dynamic adapted bicycle was completed in August 2021. Risk of bias was assessed based on individual study designs.

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  • The text indicates a correction made to the original article identified by the DOI 10.1016/j.omtn.2022.08.011.
  • This correction may address errors or inaccuracies that were present in the initial publication.
  • Understanding the specifics of the correction could be important for readers relying on the findings or data presented in the original article.
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Article Synopsis
  • Emerging viral diseases like Ebola, SARS, MERS, and COVID-19 pose challenges for therapy development due to strict safety protocols and rapid viral mutations.
  • A novel colostrum exosome-based nanoparticle delivery system, EPM, was created to simulate viral protein expression and facilitate antiviral therapeutic screening in a safer environment.
  • The EPM system successfully expressed key SARS-CoV-2 proteins and identified siRNAs that effectively reduced protein expression by 80%-95%, producing antibodies that persisted for up to 45 days, demonstrating its potential for therapeutic research.
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Purpose: To investigate the effects of providing rigid wrist-hand orthoses plus usual multidisciplinary care, on reducing hand impairments in children with cerebral palsy.

Methods: A pragmatic, multicentre, assessor-blinded randomised controlled trial aimed to enrol 194 children aged 5-15 years, with wrist flexor Modified Ashworth Scale score ≥1. Randomisation with concealed allocation was stratified by study site and passive wrist range.

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Recombination is beneficial over the long term, allowing more effective selection. Despite long-term advantages of recombination, local recombination suppression can evolve and lead to genomic degeneration, in particular on sex chromosomes. Here, we investigated the tempo of degeneration in nonrecombining regions, that is, the function curve for the accumulation of deleterious mutations over time, leveraging on 22 independent events of recombination suppression identified on mating-type chromosomes of anther-smut fungi, including newly identified ones.

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Purpose: Identify perceptions of parents and caregivers of children with cerebral palsy about being consumer research partners and identify strategies to inform involvement of parents in cerebral palsy research.

Materials And Methods: Twenty-two parents in New South Wales and Victoria (Australia) participated in this qualitative study. Seven interviews and three focus groups were completed.

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Aim: To outline the development and examine the content and construct validity of a new tool, the Dyskinetic Cerebral Palsy Functional Impact Scale (D-FIS), which measures the impact of dyskinesia on everyday activities in children with cerebral palsy (CP).

Method: D-FIS content was informed by a systematic review of dyskinesia outcome measures, in collaboration with children with dyskinetic CP, parents, caregivers, and expert clinicians. The D-FIS uses parent proxy to rate impact of dyskinesia on everyday activities.

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Mating-types allow single-celled eukaryotic organisms to distinguish self from non-self in preparation for sexual reproduction. The components of mating-type loci provide initial self/non-self-recognition through pheromone and receptor interactions that control early cell fusion events. However, they may also provide a second level of scrutiny that requires differences in alleles leading to production of a transcription factor required for successful downstream developmental pathways after initial cell fusion.

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Article Synopsis
  • Gene therapy could transform medicine by correcting abnormal gene expressions, but effective and safe delivery systems are currently a major challenge.
  • Researchers developed a delivery method using bovine colostrum exosomes and polyethyleneimine matrix (EPM) to successfully transport siRNA and plasmid DNA for gene therapy purposes.
  • The study demonstrated significant inhibition of lung tumor growth by targeting the KRAS gene and successful expression of wild-type p53 in cancer cells and animal models, indicating the potential of EPM as a novel platform for delivering genetic therapies.
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Background: Limited research exists to guide clinical decisions about trialling, selecting, implementing and evaluating eye-gaze control technology. This paper reports on the outcomes of a Delphi study that was conducted to build international stakeholder consensus to inform decision making about trialling and implementing eye-gaze control technology with people with cerebral palsy.

Methods: A three-round online Delphi survey was conducted.

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Introduction: The second edition of the Movement Assessment Battery for Children (M ABC-2) is a standardised, norm referenced assessment that is frequently used by therapists to identify children with motor difficulties. The norms for the M ABC-2 were derived from a sample of children in the United Kingdom (UK) and are combined across the age groups for boys and girls. The aims of this research were to investigate gender differences in the performance of 8- and 9-year-old Australian children and if the norms in our cohort differed from UK-based M ABC-2 norms.

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Aim: To examine the association between brain magnetic resonance imaging (MRI) characteristics and executive function and bimanual performance in children with unilateral cerebral palsy (CP).

Method: Clinical MRI brain scans were classified as: (1) predominant pathological pattern (normal, white matter injury [WMI]; grey matter injury; focal vascular insults [FVI]; malformations; or miscellaneous); and (2) focal lesions (frontal, basal ganglia, and/or thalamus). Assessments included: (1) bimanual performance; (2) unimanual dexterity; and (3) executive function tasks (information processing, attention control, cognitive flexibility, and goal setting) and behavioural ratings (parent).

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Background: Unilateral cerebral palsy (CP) is a condition that affects muscle control and function on one side of the body. Children with unilateral CP experience difficulties using their hands together secondary to disturbances that occur in the developing fetal or infant brain. Often, the more affected limb is disregarded.

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Purpose: This study aims to identify eye-gaze control technology outcomes, parent perception of the technology and support received, and gauge the feasibility of available measures.

Methods: Five children with dyskinetic cerebral palsy, mean age 4 years, 4 months (1 year, 0 months); n = 4 males; trialled two eye-gaze control technology systems, each for six weeks. Parents completed pre- and post-questionnaires.

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