Publications by authors named "Zornitza Stark"

Background And Objectives: Hypotonia is a relatively common finding among infants in the neonatal intensive care unit (NICU). Consideration of genetic testing is recommended early in the care of infants with unexplained hypotonia. We aimed to assess the diagnostic yield and overall impact of exome and genome sequencing (ES and GS).

View Article and Find Full Text PDF

Background: Acceptability, appropriateness, and feasibility are established implementation outcomes used to understand stakeholders' perceptions of an intervention. Further, they are thought to provide insight into behaviors, such as adoption. To date, measurement instruments for the three outcomes have focused on their individual assessment whilst nodding to the idea that they may interrelate.

View Article and Find Full Text PDF

Purpose: The Clinical Genome Resource (ClinGen) Gene Curation Expert Panels (GCEPs) have historically focused on specific organ systems or phenotypes; thus, the ClinGen Syndromic Disorders GCEP (SD-GCEP) was formed to address an unmet need.

Methods: The SD-GCEP applied ClinGen's framework to evaluate the clinical validity of genes associated with rare syndromic disorders. 111 Gene-Disease Relationships (GDRs) associated with 100 genes spanning the clinical spectrum of syndromic disorders were curated.

View Article and Find Full Text PDF

Purpose: Next generation sequencing has led to the creation of large pools of genomic data with analysis rather than data generation now the limiting factor. Artificial intelligence (AI) may be required to optimize the benefits of these data, but little is known about how the public feels about the use of AI in genomics.

Methods: We conducted focus groups with members of the Australian public.

View Article and Find Full Text PDF

Purpose: Families of children in pediatric acute care who are offered ultrarapid genomic sequencing are making complex decisions during a high-stress period. To reduce complexity for families and clinicians, we offered genomic screening for the child and parents after the completion of diagnostic testing. We evaluated uptake, understanding, and service delivery preferences.

View Article and Find Full Text PDF

Approximately 200 critically ill infants and children in New Zealand are in high-dependency care, many suspected of having genetic conditions, requiring scalable genomic testing. We adopted an acute care genomics protocol from an accredited laboratory and established a clinical pipeline using Oxford Nanopore Technologies PromethION 2 solo system and Fabric GEM™ software. Benchmarking of the pipeline was performed using Global Alliance for Genomics and Health benchmarking tools and Genome in a Bottle samples (HG002-HG007).

View Article and Find Full Text PDF

The use of next-generation sequencing technologies such as exome and genome sequencing in research and clinical care has transformed our understanding of the molecular architecture of genetic kidney diseases. Although the capability to identify and rigorously assess genetic variants and their relationship to disease has advanced considerably in the past decade, the curation of clinically relevant relationships between genes and specific phenotypes has received less attention, despite it underpinning accurate interpretation of genomic tests. Here, we discuss the need to accurately define gene-disease relationships in nephrology and provide a framework for appraising genetic and experimental evidence critically.

View Article and Find Full Text PDF

Objective: To design and assess a visual genomic explainer focusing on plain language and engaging imagery. The explainer aimed to support doctors' comprehension of complex genomic concepts and results and act as a resource promoting the integration of genomic testing into mainstream care.

Design: Prospective genomic resource development and questionnaire.

View Article and Find Full Text PDF

Purpose: To characterize the diagnostic and clinical outcomes of a cohort of critically ill infants and children with suspected mitochondrial disorders (MD) undergoing ultrarapid genomic testing as part of a national program.

Methods: Ultrarapid genomic sequencing was performed in 454 families (genome sequencing: n = 290, exome sequencing +/- mitochondrial DNA sequencing: n = 164). In 91 individuals, MD was considered, prompting analysis using an MD virtual gene panel.

View Article and Find Full Text PDF

Combined oxidative phosphorylation deficiency (COXPD) is a rare multisystem disorder which is clinically and genetically heterogeneous. Genome sequencing identified biallelic variants in individuals from five unrelated families with presentations ranging from Perrault syndrome (primary ovarian insufficiency and sensorineural hearing loss) to severe childhood onset of leukodystrophy, learning disability, microcephaly and retinal dystrophy. Complexome profiling of fibroblasts from affected individuals revealed reduced levels of the small and, a more pronounced reduction of, the large mitochondrial ribosomal subunits.

View Article and Find Full Text PDF
Article Synopsis
  • Scientists are collecting a lot of genetic information from many people around the world to help improve medicine and health care for everyone.
  • To make the most out of this data, we need to work together and make it easier to share it safely and fairly.
  • The article talks about ways to get better at sharing this data, including using new technology and engaging with communities, and suggests 12 important steps we can all take to make this happen.
View Article and Find Full Text PDF
Article Synopsis
  • Diagnostic genomic sequencing is becoming essential in nephrology, with efforts to enhance its national implementation to benefit patient outcomes.
  • A national study established 20 kidney genetics clinics across Australia from 2013 to 2022, offering genomic testing for patients with suspected monogenic kidney diseases and facilitating the collection of data on diagnostic experiences.
  • The initiative successfully integrated a multidisciplinary approach to kidney genetics, optimizing care for patients while adapting to ongoing technological advancements and preparing for broader healthcare funding for genomic testing.
View Article and Find Full Text PDF

The KidGen Collaborative's Policy Implementation Workshop 2023 celebrated the 10th anniversary of Australia's first kidney genetics clinic in Brisbane. This event marked the establishment of a national network now comprising 19 kidney genetics clinics across Australia, all dedicated to providing equitable access to genomic testing for families affected by genetic kidney diseases. The workshop reflected on past progress and outlined future objectives for kidney genetics in Australia, recognising the collaborative efforts of clinical teams, researchers, and patients.

View Article and Find Full Text PDF

Purpose: To develop and evaluate a scalable national program to build confidence, competence and capability in the use of rapid genomic testing (rGT) in the acute pediatric setting.

Methods: We used theory-informed approaches to design a modular, adaptive program of blended learning aimed at diverse professional groups involved in acute pediatric care. The program comprised 4 online learning modules and an online workshop and was centered on case-based learning.

View Article and Find Full Text PDF
Article Synopsis
  • * The study identifies RNU4-2, a non-coding RNA gene, as a significant contributor to syndromic NDD, revealing a specific 18-base pair region with low variation that includes variants found in 115 individuals with NDD.
  • * RNU4-2 is highly expressed in the developing brain, and its variants disrupt splicing processes, indicating that non-coding genes play a crucial role in rare disorders, potentially aiding in the diagnosis of thousands with NDD worldwide.
View Article and Find Full Text PDF

Health care is at a turning point. We are shifting from protocolized medicine to precision medicine, and digital health systems are facilitating this shift. By providing clinicians with detailed information for each patient and analytic support for decision-making at the point of care, digital health technologies are enabling a new era of precision medicine.

View Article and Find Full Text PDF

Newborn screening (NBS) programmes are highly successful, trusted, public health interventions. Genomic sequencing offers the opportunity to increase the benefits of NBS by screening infants for a greater number and variety of childhood-onset conditions. This study aimed to describe who needs to do what, when, and for whom to deliver genomic newborn screening (gNBS) and capture perceived implementation barriers and enablers.

View Article and Find Full Text PDF
Article Synopsis
  • About 25% of patients with unexplained kidney failure have a genetic cause, specifically related to monogenic disorders.
  • A study explored the effectiveness of whole genome sequencing (WGS) combined with broad gene panel analysis in diagnosing these cases, finding it to be a viable method for identifying genetic mutations.
  • Among 100 participants aged ≤50 with stage 5 chronic kidney disease, a genetic diagnosis was reached in 25%, with a higher likelihood of positive results in those with a family history of chronic kidney disease.
View Article and Find Full Text PDF

Reanalyzing stored genomic data over time is highly effective in increasing diagnostic yield in rare disease. Automation holds the promise of delivering the benefits of reanalysis at scale. Our study aimed to understand current reanalysis practices among Australian clinical and laboratory genetics services and explore attitudes towards large-scale automated re-analysis.

View Article and Find Full Text PDF
Article Synopsis
  • Scientists want to add more testing for diseases when babies are born by using special DNA tests called genomic sequencing.
  • They asked a group of Australian adults what they think should be included in this new testing, and most agreed that diseases that affect kids early in life are more important to test for than those that appear later.
  • People believe that experts should help decide which diseases to test for, and they think the testing should be paid for by the public.
View Article and Find Full Text PDF

Around 60% of individuals with neurodevelopmental disorders (NDD) remain undiagnosed after comprehensive genetic testing, primarily of protein-coding genes. Increasingly, large genome-sequenced cohorts are improving our ability to discover new diagnoses in the non-coding genome. Here, we identify the non-coding RNA as a novel syndromic NDD gene.

View Article and Find Full Text PDF

Genome-wide sequencing and genetic matchmaker services are propelling a new era of genotype-driven ascertainment of novel genetic conditions. The degree to which reported phenotype data in discovery-focused studies address informational priorities for clinicians and families is unclear. We identified reports published from 2017 to 2021 in 10 genetics journals of novel Mendelian disorders.

View Article and Find Full Text PDF