Paediatrics (RCH) - Research Publications

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    Delivering multidisciplinary neuromuscular care for children via telehealth
    Carroll, K ; Adams, J ; de Valle, K ; Forbes, R ; Kennedy, RA ; Kornberg, AJ ; Vandeleur, M ; Villano, D ; Woodcock, IR ; Yiu, EM ; Ryan, MM ; Davidson, Z (WILEY, 2022-07)
    INTRODUCTION/AIMS: In response to coronavirus disease 2019 (COVID-19) pandemic restrictions int 2020, our face-to-face (F2F) multidisciplinary neuromuscular clinic (NMC) transitioned to widespread use of telehealth (TH). This study aimed to (1) understand parent/guardian, child, and clinician perceptions of TH; (2) examine TH-related changes in clinical activity; and (3) use these findings to inform a future model of care for the NMC. METHODS: A clinical audit was undertaken to examine clinical activity throughout 2018-2020. Online surveys were distributed to clinicians and parents of children attending the NMC via TH in 2020. A working group of clinicians created a checklist to guide a future hybrid model of TH and F2F care. RESULTS: Total clinical activity in 2020 was maintained from previous years; 62.8% of all appointments occurred via TH, and 82.3% of patients attended NMC by TH at least once. Ninety-nine parents (30.6% response rate), 52 children, and 17 clinicians (77% response rate) responded to the survey. All groups reported better interaction when F2F compared to TH. Eighty percent of parents identified advantages of TH and reported lower levels of stress. A lack of "hands-on" physical assessment was identified by parents and clinicians as a TH limitation. Most families (68.1% of parents; 58.8% of children) and all clinicians indicated a preference for a mix of TH and F2F NMC appointments in the future. DISCUSSION: This study has informed a checklist to guide future TH use in a new hybrid model of care. Further investigation is required to assess health impacts of TH use in pediatric neuromuscular care.
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    THERAPEUTIC OPTIONS TO IMPROVE BONE HEALTH OUTCOMES IN DUCHENNE MUSCULAR DYSTROPHY: ZOLEDRONIC ACID AND PUBERTAL INDUCTION
    Lim, A ; Zacharin, M ; Pitkin, J ; de Valle, K ; Ryan, MM ; Simm, PJ (WILEY, 2017-12)
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    Involving families in the design of a weight management program for Duchenne muscular dystrophy - Supporting nutrition and optimising wellbeing program
    Billich, N ; Bray, P ; Truby, H ; Evans, M ; Sowerby, B ; de Valle, K ; Carroll, K ; Villano, D ; Ryan, M ; Davidson, Z (PERGAMON-ELSEVIER SCIENCE LTD, 2020-10)
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    The effects of calf massage in boys with Duchenne muscular dystrophy: a prospective interventional study
    Carroll, K ; Yiu, EM ; Ryan, MM ; Kennedy, RA ; de Valle, K (TAYLOR & FRANCIS LTD, 2021-12-18)
    PURPOSE: We explored the effects of standardized calf massage in ambulant boys with Duchenne muscular dystrophy (DMD) using a prospective study design. MATERIALS AND METHODS: Twenty boys completed two study visits, 1 week apart. At both visits, each leg received a 10-min calf massage (intervention) and a 10-min control rest period (placebo) in randomized order. Muscle length of calf and hamstrings and gastrocnemius stiffness were measured by a blinded assessor before and after intervention and placebo. Measures of gait function (timed 10-m walk/run and spatio-temporal gait parameters); gastrocnemius muscle ultrasound findings; participant perception of leg pain, stiffness and effort of walking and general psychological well-being were also collected. RESULTS: Consistent significant small increases in muscle length of soleus, gastrocnemius and hamstrings were recorded post-massage, and gastrocnemius stiffness decreased. Small changes in gastrocnemius and soleus length only were also recorded following the control rest period. Gait function and general well-being remained stable throughout. Measurement across both study visits suggested that gains in muscle length may be cumulative with repeated massage. CONCLUSIONS: Calf massage is safe and associated with benefits to muscle length and stiffness for ambulant boys with DMD.Implications for RehabilitationIn a small sample of boys with Duchenne muscular dystrophy, calf massage was found to be safe, well-tolerated and associated with increased muscle length and decreased stiffness.The use of massage may assist in managing muscle length in boys with Duchenne muscular dystrophy.
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    Reliability and validity of the FSHD-composite outcome measure in childhood facioscapulohumeral dystrophy
    de Valle, K ; Dobson, F ; Woodcock, I ; Carroll, K ; Ryan, MM ; Heatwole, C ; Eichinger, K ; McGinley, JL (PERGAMON-ELSEVIER SCIENCE LTD, 2021-08)
    This study aims to investigate intra-rater reliability and construct validity of the Facioscapulohumeral Dystrophy Composite Outcome Measure (FSHD-COM), in childhood FSHD. Participants included eighteen children with FSHD, and matched healthy controls. Reliability data were collected from 15 participants with FSHD over two testing sessions. Validity data were collected from all participants. Participants with FSHD completed; the FSHD-COM (and modified pediatric version), Motor Function Measure-32 (MFM-32), FSHD Severity Scales, Performance of the Upper Limb 2.0, Pediatric Quality of Life™ Neuromuscular Module and pediatric FSHD Health-Index Questionnaire. Both versions of the FSHD-COM showed excellent intra-rater reliability (ICC1,2 > 0.99, lower 95%CI > 0.98) with a Minimal Detectable Change (MDC95%) of ≤14.5%. The FSHD-COM had robust and widespread correlations with other related outcome measures. The FSHD-COM versions and 6 min walk test effectively discriminated between children with and without FSHD; the MFM-32 and 10 m walk/run test did not. Ceiling effects were not observed on either version of the FSHD-COM. Reliability and validity findings in this childhood FSHD study concord with estimates in adults. Both versions of the FSHD-COM were effective in discriminating disease in children with mild FSHD symptoms. The FSHD-COM has the potential to be a useful measure of function across the life span.
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    ATALUREN TREATMENT OF PATIENTS WITH NONSENSE MUTATION DYSTROPHINOPATHY
    Bushby, K ; Finkel, R ; Wong, B ; Barohn, R ; Campbell, C ; Comi, GP ; Connolly, AM ; Day, JW ; Flanigan, KM ; Goemans, N ; Jones, KJ ; Mercuri, E ; Quinlivan, R ; Renfroe, JB ; Russman, B ; Ryan, MM ; Tulinius, M ; Voit, T ; Moore, SA ; Sweeney, HL ; Abresch, RT ; Coleman, KL ; Eagle, M ; Florence, J ; Gappmaier, E ; Glanzman, AM ; Henricson, E ; Barth, J ; Elfring, GL ; Reha, A ; Spiegel, RJ ; O'Donnell, MW ; Peltz, SW ; McDonald, CM (WILEY, 2014-10)
    INTRODUCTION: Dystrophinopathy is a rare, severe muscle disorder, and nonsense mutations are found in 13% of cases. Ataluren was developed to enable ribosomal readthrough of premature stop codons in nonsense mutation (nm) genetic disorders. METHODS: Randomized, double-blind, placebo-controlled study; males ≥ 5 years with nm-dystrophinopathy received study drug orally 3 times daily, ataluren 10, 10, 20 mg/kg (N=57); ataluren 20, 20, 40 mg/kg (N=60); or placebo (N=57) for 48 weeks. The primary endpoint was change in 6-Minute Walk Distance (6MWD) at Week 48. RESULTS: Ataluren was generally well tolerated. The primary endpoint favored ataluren 10, 10, 20 mg/kg versus placebo; the week 48 6MWD Δ=31.3 meters, post hoc P=0.056. Secondary endpoints (timed function tests) showed meaningful differences between ataluren 10, 10, 20 mg/kg, and placebo. CONCLUSIONS: As the first investigational new drug targeting the underlying cause of nm-dystrophinopathy, ataluren offers promise as a treatment for this orphan genetic disorder with high unmet medical need.
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    Dejerine-Sottas disease in childhood-Genetic and sonographic heterogeneity
    Hobbelink, SMR ; Brockley, CR ; Kennedy, RA ; Carroll, K ; de Valle, K ; Rao, P ; Davis, MR ; Laing, NG ; Voermans, NC ; Ryan, MM ; Yiu, EM (WILEY, 2018-04)
    INTRODUCTION: The nerve sonographic features of Dejerine-Sottas disease (DSD) have not previously been described. METHODS: This exploratory cross-sectional, matched, case-control study investigated differences in nerve cross-sectional area (CSA) in children with DSD compared to healthy controls and children with Charcot-Marie-Tooth disease type 1A (CMT1A). CSA of the median, ulnar, tibial, and sural nerves was measured by peripheral nerve ultrasound. The mean difference in CSA between children with DSD, controls, and CMT1A was determined individually and within each group. RESULTS: Five children with DSD and five age- and sex-matched controls were enrolled. Data from five age-matched children with CMT1A was also included. Group comparison showed no mean difference in nerve CSA between children with DSD and controls. Individual analysis of each DSD patient with their matched control indicated an increase in nerve CSA in three of the five children. The largest increase was observed in a child with a heterozygous PMP22 point mutation (nerve CSA fivefold larger than a control and twofold larger than a child with CMT1A). Nerve CSA was moderately increased in two children-one with a heterozygous mutation in MPZ and the other of unknown genetic etiology. CONCLUSIONS: Changes in nerve CSA on ultrasonography in children with DSD differ according to the underlying genetic etiology, confirming the variation in underlying pathobiologic processes and downstream morphological abnormalities of DSD subtypes. Nerve ultrasound may assist in the clinical phenotyping of DSD and act as an adjunct to known distinctive clinical and neurophysiologic findings of DSD subtypes. Larger studies in DSD cohorts are required to confirm these findings.