28 results on '"Fisk, K"'
Search Results
2. Paternal retraction of a fragile X allele to normal size, showing normal function over two generations
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Bartlett, E, Archibald, AD, Francis, D, Ling, L, Thomas, R, Chandler, G, Ward, L, O'Farrell, G, Pandelache, A, Delatycki, MB, Bennetts, BH, Ho, G, Fisk, K, Baker, EK, Amor, DJ, Godler, DE, Bartlett, E, Archibald, AD, Francis, D, Ling, L, Thomas, R, Chandler, G, Ward, L, O'Farrell, G, Pandelache, A, Delatycki, MB, Bennetts, BH, Ho, G, Fisk, K, Baker, EK, Amor, DJ, and Godler, DE
- Abstract
The FMR1 premutation (PM:55-199 CGG) is associated with fragile X-associated tremor/ataxia syndrome (FXTAS) and when maternally transmitted is at risk of expansion to a hypermethylated full mutation (FM: ≥ 200 CGG) that causes fragile X syndrome (FXS). We describe a maternally transmitted PM (77 CGG) that was passed to a son (103 CGG), and to a daughter (220-1822 CGG), who were affected with FXTAS and FXS, respectively. The male with the PM showed low-level mosaicism for normal size of 30 and 37 CGG. This male had two offspring: one female mosaic for PM and FM (56, 157, >200 CGG) and another with only a 37 CGG allele detected in multiple tissues, neither with a clinical phenotype. The female with the 37 CGG allele showed normal levels of FMR1 methylation and mRNA and passed this 37 CGG allele to one of her daughters, who was also unaffected. These findings show that post-zygotic paternal retraction can lead to low-level mosaicism for normal size alleles, with these normal alleles being functional when passed over two generations.
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- 2022
3. Revealing hidden genetic diagnoses in the ocular anterior segment disorders
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Ma, A, Yousoof, S, Grigg, JR, Flaherty, M, Minoche, AE, Cowley, MJ, Nash, BM, Ho, G, Gayagay, T, Lai, T, Farnsworth, E, Hackett, EL, Fisk, K, Wong, K, Holman, KJ, Jenkins, G, Cheng, A, Martin, F, Karaconji, T, Elder, JE, Enriquez, A, Wilson, M, Amor, DJ, Stutterd, CA, Kamien, B, Nelson, J, Dinger, ME, Bennetts, B, Jamieson, RV, Ma, A, Yousoof, S, Grigg, JR, Flaherty, M, Minoche, AE, Cowley, MJ, Nash, BM, Ho, G, Gayagay, T, Lai, T, Farnsworth, E, Hackett, EL, Fisk, K, Wong, K, Holman, KJ, Jenkins, G, Cheng, A, Martin, F, Karaconji, T, Elder, JE, Enriquez, A, Wilson, M, Amor, DJ, Stutterd, CA, Kamien, B, Nelson, J, Dinger, ME, Bennetts, B, and Jamieson, RV
- Abstract
Purpose: Ocular anterior segment disorders (ASDs) are clinically and genetically heterogeneous, and genetic diagnosis often remains elusive. In this study, we demonstrate the value of a combined analysis protocol using phenotypic, genomic, and pedigree structure data to achieve a genetic conclusion. Methods: We utilized a combination of chromosome microarray, exome sequencing, and genome sequencing with structural variant and trio analysis to investigate a cohort of 41 predominantly sporadic cases. Results: We identified likely causative variants in 54% (22/41) of cases, including 51% (19/37) of sporadic cases and 75% (3/4) of cases initially referred as familial ASD. Two-thirds of sporadic cases were found to have heterozygous variants, which in most cases were de novo. Approximately one-third (7/22) of genetic diagnoses were found in rarely reported or recently identified ASD genes including PXDN, GJA8, COL4A1, ITPR1, CPAMD8, as well as the new phenotypic association of Axenfeld–Rieger anomaly with a homozygous ADAMTS17 variant. The remainder of the variants were in key ASD genes including FOXC1, PITX2, CYP1B1, FOXE3, and PAX6. Conclusions: We demonstrate the benefit of detailed phenotypic, genomic, variant, and segregation analysis to uncover some of the previously “hidden” heritable answers in several rarely reported and newly identified ocular ASD-related disease genes.
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- 2020
4. Context matters: Explicit and implicit reminders of ingroup privilege increase collective guilt among foreigners in a developing country
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Greenaway, KH, Fisk, K, Branscombe, NR, Greenaway, KH, Fisk, K, and Branscombe, NR
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We test three ways context matters in the study of intergroup inequality: where participants are approached, who interacts with participants, and how researchers ask participants questions. Regarding how, we replicate a finding that framing intergroup inequality as outgroup disadvantage rather than ingroup privilege reduces collective guilt in a novel context. Regarding where, we go beyond the laboratory to test foreigners in Nepal—a country where inequality is highly salient. Regarding who, we had participants approached by an ingroup (foreign) experimenter or an outgroup (Nepalese) experimenter. We found an outgroup disadvantage framing reduced collective guilt relative to ingroup privilege framing, but only when delivered by an ingroup member. This highlights the importance of taking where, who, and how into account to fully understand the contextual nature of intergroup emotion.
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- 2017
5. Performance of calves fed fresh colostrum from their dams, compared with that of calves fed colostrum from cows other than their dams
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Donovan, G. A., Sims, L. J., Fisk, K., Sapp, W., and Pinedo, P.
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Preservative ,Potassium sorbate ,animal diseases ,food and beverages ,Cold storage ,Biology ,chemistry.chemical_compound ,fluids and secretions ,Animal science ,Nutrient ,chemistry ,Colostrum ,reproductive and urinary physiology ,Immune Factors - Abstract
Adequate colostrum feeding is the most important management factor determining calf health and survival. Colostrum not only provides immunoglobulins, but it is also an important source of nutrients and nonspecific immune factors, including maternal leukocytes and cytokine proteins, all of which protect the newborn calf against infectious diseases early in life. Considering the potential role of these non-immunoglobulin factors, our hypothesis was that dairy calves fed fresh colostrum from their dams would perform better than those fed colostrum from cows other than their dams that had been stored cold and had a preservative added. The objective was to assess performance (growth and survival) of calves fed fresh colostrum from their dams, compared with that of calves fed colostrum from cows other than their dams that had been treated with a potassium sorbate preservative and stored refrigerated (up to 48 hours) or frozen., American Association of Bovine Practitioners Proceedings of the Annual Conference, 2012
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- 2012
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6. Performance of calves fed fresh colostrum from their dams, compared with that of calves fed colostrum from cows other than their dams
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Donovan, G. A., primary, Sims, L. J., additional, Fisk, K., additional, Sapp, W., additional, and Pinedo, P., additional
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- 2012
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7. Magnetostratigraphy and sedimentary evolution of the late Miocene to early Pleistocene sediments, Quseir region, Egyptian Red Sea
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Lean, CB, Hounslow, MW, Vine, FJ, Harwood, GM, Elvidge, L, Fisk, K, Kendall, AC, Montgomery, P, Lean, CB, Hounslow, MW, Vine, FJ, Harwood, GM, Elvidge, L, Fisk, K, Kendall, AC, and Montgomery, P
- Abstract
An integrated sedimentological and magnetostratigraphic study has allowed a detailed understanding of the late Miocene to early Pleistocene evolution of the sediments in the Quseir region of the Egyptian Red Sea coast. Palaeomagnetic samples were collected from sections in six wadis, covering the Shagara Formation, the Gabir and Samh members of the Wardan Formation, and the Abu Dabbab Formation evaporites. Remanence properties are carried by magnetite, haematite and goethite. The characteristic remanence is typically carried by detrital magnetite and haematite, with more recent overprints predominantly associated with haematite and goethite, produced by the weathering of diagenetic pyrite. The magnetostratigraphy has allowed the following detailed age assignments for the lithostratigraphic units. The Shagara Formation ranges in age from late Pliocene (late Piacenzian) to middle Pleistocene (0.6–2.5Ma). The Gabir Member is latest Messinian to earliest Piacenzian in age (≈3.5–5.5Ma) and the Samh Member, late Tortonian to mid-Messinian (≈6.0–7.5Ma). The age of the top of the Abu Dabbab Formation is probably mid-Tortonian (≈8Ma). Disconformities occur between all the lithostratigraphic units, with a local angular unconformity between the Shagara and Wardan Formations. Lowstands in global sea level appear to have a strong influence on the timing of these disconformities. Characteristic mixed alluvial and reef facies of the Shagara formation are a response to the ephemeral wetter climate following the initiation of northern hemisphere glaciation at ≈2.4Ma, enhanced by rift-margin uplift of basement complexes to the west. This tectonic activity was concentrated in the early Piacenzian. The marine Gabir Member was deposited during the early Pliocene and latest Messinian high-sea-level stands. The late Tortonian/early Messinian age and sedimentological character of the Samh Member indicates this unit was affected by marine flooding events, which ultimately produced, during d
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- 1998
8. Anisotropic Prestack Depth Migration and Model Building
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Bloor, R., primary, Whitfield, P., additional, and Fisk, K., additional
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- 2001
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9. An Automated Database System for Preliminary Spacecraft Design
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Grooms, H. R., additional, Blanchard, W., additional, Hawthorne, D., additional, and Fisk, K., additional
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- 1992
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10. Fat Uptake in French Fries as Affected by Different Potato Varieties and Processing.
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O'Connor, C. J., Fisk, K. J., Smith, B. G., and Melton, L. D.
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POTATOES , *SWEET potatoes , *FRENCH fries , *FAT content of food , *FRYING , *LIPIDS - Abstract
The uptake of lipid into French fries was investigated using two varieties of potato ('Russet Burbank' and 'Agria') and the New Zealand sweet potato, Ipomoea batatas, (kumara). The variety of potato used had a significant effect on lipid uptake, with 'Agria' having the lowest lipid content. The different cellular structures may have affected the fat uptake in the French fries by influencing either the loss of moisture during finish-frying or the damage done to the original anatomy during processing before pre-frying. The French fries that had undergone frozen storage had a higher amount of lipid contained in their inner core than did those that had been either chilled or prepared freshly for frying. [ABSTRACT FROM AUTHOR]
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- 2001
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11. Open line.
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FOSTER, D., FINCH, J., GERHARDY, D., and FISK, K.
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MURDER trials ,BULLYING ,DOMESTIC violence - Abstract
Several letters to the editor are presented in response to articles published in the March 2014 issue including "The Society Murder Trial Shocking Melbourne," "I didn't relate to the bloodied & bruised woman, even though I was her," and "How we've created a bullying epidemic."
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- 2014
12. Monitoring performance of tallow during deep frying of chips (French fries)
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O'Connor, Charmian J, Fisk, Kimberly J, and Melton, Laurence D
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- 2001
13. Millennium focus
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Fisk, Kimberley
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- 1999
14. 8 blue-ribbon classrooms.
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Fisk, K. and Moreno, L.
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EDUCATION - Abstract
Offers innovative ideas from `Instructor's' Class Design Contest winners. Big-book rack; Themed trellis that hangs from the ceiling; Mini gallery for children's artwork.
- Published
- 1992
15. Nationwide, Couple-Based Genetic Carrier Screening.
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Kirk EP, Delatycki MB, Archibald AD, Tutty E, Caruana J, Halliday JL, Lewis S, McClaren BJ, Newson AJ, Dive L, Best S, Long JC, Braithwaite J, Downes MJ, Scuffham PA, Massie J, Barlow-Stewart K, Kulkarni A, Ruscigno A, Kanga-Parabia A, Rodrigues B, Bennetts BH, Ebzery C, Hunt C, Cliffe CC, Lee C, Azmanov D, King EA, Madelli EO, Zhang F, Ho G, Danos I, Liebelt J, Fletcher J, Kennedy J, Beilby J, Emery JD, McGaughran J, Marum JE, Scarff K, Fisk K, Harrison K, Boggs K, Giameos L, Fitzgerald L, Thomas L, Burnett L, Freeman L, Harris M, Berbic M, Davis MR, Cifuentes Ochoa M, Wallis M, Wall M, Chow MTM, Ferrie MM, Pachter N, Quayum N, Lang N, Kasi Pandy P, Casella R, Allcock RJN, Ong R, Edwards S, Sundercombe S, Jelenich S, Righetti S, Lunke S, Kaur S, Stock-Myer S, Eggers S, Walker SP, Theodorou T, Catchpool T, Clinch T, Roscioli T, Hardy T, Zhu Y, Fehlberg Z, Boughtwood TF, and Laing NG
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- Adult, Female, Humans, Male, Pregnancy, Australia, Feasibility Studies, Patient Acceptance of Health Care statistics & numerical data, Decision Making, Heterozygote, Family Characteristics, Reproductive Behavior, Genetic Carrier Screening methods, Genetic Carrier Screening statistics & numerical data, Genetic Diseases, Inborn genetics, Genetic Diseases, Inborn prevention & control, Genetic Diseases, Inborn psychology
- Abstract
Background: Genomic sequencing technology allows for identification of reproductive couples with an increased chance, as compared with that in the general population, of having a child with an autosomal recessive or X-linked genetic condition., Methods: We investigated the feasibility, acceptability, and outcomes of a nationwide, couple-based genetic carrier screening program in Australia as part of the Mackenzie's Mission project. Health care providers offered screening to persons before pregnancy or early in pregnancy. The results obtained from testing at least 1281 genes were provided to the reproductive couples. We aimed to ascertain the psychosocial effects on participants, the acceptability of screening to all participants, and the reproductive choices of persons identified as having an increased chance of having a child with a condition for which we screened., Results: Among 10,038 reproductive couples enrolled in the study, 9107 (90.7%) completed screening, and 175 (1.9%) were newly identified as having an increased chance of having a child with a genetic condition for which we screened. These conditions involved pathogenic variants in 90 different genes; 74.3% of the conditions were autosomal recessive. Three months after receiving the results, 76.6% of the couples with a newly identified increased chance had used or planned to use reproductive interventions to avoid having an affected child. Those newly identified as having an increased chance had greater anxiety than those with a low chance. The median level of decisional regret was low in all result groups, and 98.9% of participants perceived screening to be acceptable., Conclusions: Couple-based reproductive genetic carrier screening was largely acceptable to participants and was used to inform reproductive decision making. The delivery of screening to a diverse and geographically dispersed population was feasible. (Funded by the Medical Research Future Fund of the Australian government; ClinicalTrials.gov number, NCT04157595.)., (Copyright © 2024 Massachusetts Medical Society.)
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- 2024
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16. Prevalence, Best Practice Use, and Member Engagement on School Mental Health Teams.
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Wargel-Fisk K, Kerr AM, Hall MD, Litvitskiy NS, Flaspohler PD, and Meyer AL
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School mental health (SMH) teams have been widely recommended to support multi-tiered mental health program implementation in schools. Available research suggests emerging best practices that promote effective SMH teaming and indicates the importance of having team members who are highly engaged (e.g., actively involved, retained on the team). Despite evidence that these factors improve team functioning, there is limited knowledge of SMH team prevalence, best practice use, and factors impacting member engagement among a diverse sample of elementary schools. This study surveyed a cross-sectional sample of elementary principals ( n = 314) across the United States whose schools implement multi-tiered SMH programs. Most principals (89%, n = 280) reported using teams to organize these programs. Schools in urban/suburban communities, with 300 or more students, or with specific school funding for SMH activities were more likely to have SMH teams. Only one-third of principals reported that their team members participated in related training. Other SMH team best practices were commonly reported (by two-thirds or more teams). Results of a linear regression model indicate that larger teams (six or more members) and teams with access to resources had significantly higher member engagement scores. The study's findings provide recommendations for practice and future research directions.
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- 2024
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17. On the Discontinuation of Enteral Feeding in Head and Neck Cancer: A Case Report.
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Fisk K and Sanchez A
- Abstract
Introduction: The goal of palliative care is to preserve the quality of life or patient "comfort" in patients with serious diseases. Palliative care providers serve a wide range of patients: from those who seek curative treatment to those who are actively dying. Given this range, palliative care must mirror the dynamic goals of the patient at different stages of life and treatment. Throughout these stages, a goal of the palliative care provider would be to avoid hastening death; however, this often leads to clinical decisions that directly pit the patient's comfort against the patient's life span. This is most salient with clinical decisions of withdrawing treatments that prolong life even at the expense of comfort. An example of this dichotomy can be seen when providers use enteral nutrition to treat head and neck cancer patients., Case Presentation: We describe a patient with stage IV pancreatic cancer with metastases to her head and neck. The patient was experiencing increased morbidity related to her percutaneous endoscopic gastrostomy (PEG) tube feeding. These complications included tube-related concerns such as infection, leakage, and diarrhea but also decreased intended benefits as she lost weight and functionality while maintaining enteral feeding. Despite the patient experiencing a common and expected disease course, she remained unsure and was fearful about considering discontinuation of her enteral feeding. However, the care team who understood the risks, benefits, and harms related to withdrawal provided a foundation of discussion and mitigated patient fears, allowing for the successful removal of her PEG tube and increased quality of life at the end of life., Conclusion: To care for a patient in their entirety is also to care for them at all stages of disease. Care is not limited to those who might be cured of disease, but should also consider those who continue to live with disease and the downstream effects of medical interventions used to support them. Discontinuing treatments whose harms outweigh the benefits to patients is a moral imperative to providers; yet, how providers approach discontinuing life-prolonging treatment is seen as morally distressing. Our patient did not see the discussion as morally distressing and continued to benefit from active discussions even at the end of her life., Competing Interests: Conflicts of Interest: The authors declare they have no conflicts of interest., (© 2023 HCA Physician Services, Inc. d/b/a Emerald Medical Education.)
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- 2023
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18. GABRA1-Related Disorders: From Genetic to Functional Pathways.
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Musto E, Liao VWY, Johannesen KM, Fenger CD, Lederer D, Kothur K, Fisk K, Bennetts B, Vrielynck P, Delaby D, Ceulemans B, Weckhuysen S, Sparber P, Bouman A, Ardern-Holmes S, Troedson C, Battaglia DI, Goel H, Feyma T, Bakhtiari S, Tjoa L, Boxill M, Demina N, Shchagina O, Dadali E, Kruer M, Cantalupo G, Contaldo I, Polster T, Isidor B, Bova SM, Fazeli W, Wouters L, Miranda MJ, Darra F, Pede E, Le Duc D, Jamra RA, Küry S, Proietti J, McSweeney N, Brokamp E, Andrews PI, Gouray Garcia M, Chebib M, Møller RS, Ahring PK, and Gardella E
- Abstract
Objective: Variants in GABRA1 have been associated with a broad epilepsy spectrum, ranging from genetic generalized epilepsies to developmental and epileptic encephalopathies. However, our understanding of what determines the phenotype severity and best treatment options remains inadequate. We therefore aimed to analyze the electroclinical features and the functional effects of GABRA1 variants to establish genotype-phenotype correlations., Methods: Genetic and electroclinical data of 27 individuals (22 unrelated and 2 families) harboring 20 different GABRA1 variants were collected and accompanied by functional analysis of 19 variants., Results: Individuals in this cohort could be assigned into different clinical subgroups based on the functional effect of their variant and its structural position within the GABRA1 subunit. A homogenous phenotype with mild cognitive impairment and infantile onset epilepsy (focal seizures, fever sensitivity, and electroencephalographic posterior epileptiform discharges) was described for variants in the extracellular domain and the small transmembrane loops. These variants displayed loss-of-function (LoF) effects, and the patients generally had a favorable outcome. A more severe phenotype was associated with variants in the pore-forming transmembrane helices. These variants displayed either gain-of-function (GoF) or LoF effects. GoF variants were associated with severe early onset neurodevelopmental disorders, including early infantile developmental and epileptic encephalopathy., Interpretation: Our data expand the genetic and phenotypic spectrum of GABRA1 epilepsies and permit delineation of specific subphenotypes for LoF and GoF variants, through the heterogeneity of phenotypes and variants. Generally, variants in the transmembrane helices cause more severe phenotypes, in particular GoF variants. These findings establish the basis for a better understanding of the pathomechanism and a precision medicine approach in GABRA1-related disorders. Further studies in larger populations are needed to provide a conclusive genotype-phenotype correlation. ANN NEUROL 2023., (© 2023 American Neurological Association.)
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- 2023
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19. Shariant platform: Enabling evidence sharing across Australian clinical genetic-testing laboratories to support variant interpretation.
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Tudini E, Andrews J, Lawrence DM, King-Smith SL, Baker N, Baxter L, Beilby J, Bennetts B, Beshay V, Black M, Boughtwood TF, Brion K, Cheong PL, Christie M, Christodoulou J, Chong B, Cox K, Davis MR, Dejong L, Dinger ME, Doig KD, Douglas E, Dubowsky A, Ellul M, Fellowes A, Fisk K, Fortuno C, Friend K, Gallagher RL, Gao S, Hackett E, Hadler J, Hipwell M, Ho G, Hollway G, Hooper AJ, Kassahn KS, Krishnaraj R, Lau C, Le H, San Leong H, Lundie B, Lunke S, Marty A, McPhillips M, Nguyen LT, Nones K, Palmer K, Pearson JV, Quinn MCJ, Rawlings LH, Sadedin S, Sanchez L, Schreiber AW, Sigalas E, Simsek A, Soubrier J, Stark Z, Thompson BA, U J, Vakulin CG, Wells AV, Wise CA, Woods R, Ziolkowski A, Brion MJ, Scott HS, Thorne NP, and Spurdle AB
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- Humans, Genetic Variation, Australia, Genetic Testing, Databases, Genetic, Laboratories
- Abstract
Sharing genomic variant interpretations across laboratories promotes consistency in variant assertions. A landscape analysis of Australian clinical genetic-testing laboratories in 2017 identified that, despite the national-accreditation-body recommendations encouraging laboratories to submit genotypic data to clinical databases, fewer than 300 variants had been shared to the ClinVar public database. Consultations with Australian laboratories identified resource constraints limiting routine application of manual processes, consent issues, and differences in interpretation systems as barriers to sharing. This information was used to define key needs and solutions required to enable national sharing of variant interpretations. The Shariant platform, using both the GRCh37 and GRCh38 genome builds, was developed to enable ongoing sharing of variant interpretations and associated evidence between Australian clinical genetic-testing laboratories. Where possible, two-way automated sharing was implemented so that disruption to laboratory workflows would be minimized. Terms of use were developed through consultation and currently restrict access to Australian clinical genetic-testing laboratories. Shariant was designed to store and compare structured evidence, to promote and record resolution of inter-laboratory classification discrepancies, and to streamline the submission of variant assertions to ClinVar. As of December 2021, more than 14,000 largely prospectively curated variant records from 11 participating laboratories have been shared. Discrepant classifications have been identified for 11% (28/260) of variants submitted by more than one laboratory. We have demonstrated that co-design with clinical laboratories is vital to developing and implementing a national variant-interpretation sharing effort. This approach has improved inter-laboratory concordance and enabled opportunities to standardize interpretation practices., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2022 American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.)
- Published
- 2022
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20. Preventive Force : Drones, Targeted Killing, and the Transformation of Contemporary Warfare
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Fisk, Kerstin, Ramos, Jennifer M., Fisk, Kerstin, and Ramos, Jennifer M.
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- 2016
21. A serendipitous journey to a promoter variant: The c.-106C>A variant and its role in late-onset ornithine transcarbamylase deficiency.
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Hertzog A, Selvanathan A, Halligan R, Fazio T, de Jong G, Bratkovic D, Bhattacharya K, Tolun AA, Bennetts B, and Fisk K
- Abstract
Ornithine transcarbamylase deficiency (OTCD) is an X-linked urea cycle disorder characterised by reduced or absent OTC enzyme activity, resulting in the accumulation of neurotoxic ammonia. Approximately 80%-90% of the causative variants are identified by Sanger sequencing or multiplex ligation-dependent probe amplification (MLPA) of the OTC gene. A 23-year-old male with biochemical evidence of OTCD was referred for molecular analysis. Initial Sanger sequencing yielded no pathogenic variants. MLPA testing raised suspicion of a mosaic deletion of exon 1; however, high-resolution microarray did not identify a copy number variant on the X chromosome. Sequencing over the suspected breakpoint detected a hemizygous likely pathogenic promoter variant, c.-106C > A, which was located within the MLPA probe binding site. Subsequently, historical patients referred to our centre, without a molecular aetiology for their OTCD, were re-sequenced with these primers and this variant was also identified in two additional unrelated males. All three patients described in this case series have the late-onset disease. Two presented at 5 years of age with vomiting, whilst the other was managed from birth based on a family history of late-onset OTCD. One patient required liver transplantation due to recurrent decompensations; the other two are managed with a protein-restricted diet. All three patients have not sustained any significant neurological insults and are functioning well as adults. These cases support screening of the promoter region within the OTC gene, particularly if a molecular basis has not been elucidated by MLPA or sequencing of the coding regions., Competing Interests: Ashley Hertzog, Arthavan Selvanathan, Rebecca Halligan, Timothy Fazio, Gerard de Jong, Drago Bratkovic, Kaustuv Bhattacharya, Adviye Ayper Tolun, Bruce Bennetts and Katrina Fisk declare that they have no conflicts of interest. This manuscript has not been submitted for review elsewhere and has been approved by all other authors for submission., (© 2022 The Authors. JIMD Reports published by John Wiley & Sons Ltd on behalf of SSIEM.)
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- 2022
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22. Paternal retraction of a fragile X allele to normal size, showing normal function over two generations.
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Bartlett E, Archibald AD, Francis D, Ling L, Thomas R, Chandler G, Ward L, O'Farrell G, Pandelache A, Delatycki MB, Bennetts BH, Ho G, Fisk K, Baker EK, Amor DJ, and Godler DE
- Subjects
- Alleles, DNA Methylation, Female, Humans, Male, Mutation, Trinucleotide Repeat Expansion, Fragile X Mental Retardation Protein genetics, Fragile X Syndrome diagnosis, Fragile X Syndrome genetics
- Abstract
The FMR1 premutation (PM:55-199 CGG) is associated with fragile X-associated tremor/ataxia syndrome (FXTAS) and when maternally transmitted is at risk of expansion to a hypermethylated full mutation (FM: ≥ 200 CGG) that causes fragile X syndrome (FXS). We describe a maternally transmitted PM (77 CGG) that was passed to a son (103 CGG), and to a daughter (220-1822 CGG), who were affected with FXTAS and FXS, respectively. The male with the PM showed low-level mosaicism for normal size of 30 and 37 CGG. This male had two offspring: one female mosaic for PM and FM (56, 157, >200 CGG) and another with only a 37 CGG allele detected in multiple tissues, neither with a clinical phenotype. The female with the 37 CGG allele showed normal levels of FMR1 methylation and mRNA and passed this 37 CGG allele to one of her daughters, who was also unaffected. These findings show that post-zygotic paternal retraction can lead to low-level mosaicism for normal size alleles, with these normal alleles being functional when passed over two generations., (© 2021 Wiley Periodicals LLC.)
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- 2022
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23. Adverse health manifestations in the hands of vibration exposed carpenters - a cross sectional study.
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Tekavec E, Löfqvist L, Larsson A, Fisk K, Riddar J, Nilsson T, and Nordander C
- Abstract
Background: Despite EU regulatory standards, many workers suffer injury as a result of working with hand-held vibrating tools. Our aim of this study was to confirm whether carpenters, a highly exposed group, suffer more injuries to their hands than painters, a group assumed to be less exposed to vibration., Methods: 193 carpenters (participation rate 100%) and 72 painters (participation rate 67%), all men, answered a questionnaire and underwent a clinical examination to identify manifestations of neural and vascular origin in the hands. Neurosensory affection was defined as having at least one symptom in the fingers/hands (impaired perception of touch, warmth, or cold, impaired dexterity, increased sensation of cold, numbness or tingling, or pain in the fingers/hands when cold) and at least one clinical finding (impaired perception of touch, warmth, cold, vibration, or two-point discrimination). Logistic regression was used to calculate odds ratios (OR) and 95% confidence intervals (CI)., Results: Neurosensory affection was fulfilled for 31% of the carpenters and 17% of the painters, age-adjusted OR 3.3 (CI 1.6-7.0). Among carpenters with neurosensory affection 18% reported interference with daily life activities, the most common symptoms being increased sensation of cold, numbness and pain in the fingers/hands when cold, the most common clinical findings were impaired perception of touch and vibration. Neurosensory affection was found in 12% of young carpenters (≤ 30 years old). No difference was found in the prevalence of white fingers between carpenters and painters., Conclusions: Carpenters showed more symptoms and clinical findings of neurosensory affection than painters, probably due to vibration exposure. Also young carpenters showed signs of neurosensory affection, which indicates that under current conditions workers at these companies are not protected against injury. This underlines the importance of reducing exposure to vibration and conducting regular medical check-ups to detect early signs of neural and vascular manifestations indicating hand-arm vibration injuries. Special attention should be given to symptoms of increased sensation of cold, pain in the fingers when cold, and numbness, as these were the most common initiating ones, and should be addressed as early as possible in the preventive sentinel process. It is also important to test clinically for small- and large-fibre neuropathy, as the individual may be unaware of any pathology.
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- 2021
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24. Australia and New Zealand renal gene panel testing in routine clinical practice of 542 families.
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Tanudisastro HA, Holman K, Ho G, Farnsworth E, Fisk K, Gayagay T, Hackett E, Jenkins G, Krishnaraj R, Lai T, Wong K, Patel C, Mallawaarachchi A, Mallett AJ, Bennetts B, Alexander SI, and McCarthy HJ
- Abstract
Genetic testing in nephrology clinical practice has moved rapidly from a rare specialized test to routine practice both in pediatric and adult nephrology. However, clear information pertaining to the likely outcome of testing is still missing. Here we describe the experience of the accredited Australia and New Zealand Renal Gene Panels clinical service, reporting on sequencing for 552 individuals from 542 families with suspected kidney disease in Australia and New Zealand. An increasing number of referrals have been processed since service inception with an overall diagnostic rate of 35%. The likelihood of identifying a causative variant varies according to both age at referral and gene panel. Although results from high throughput genetic testing have been primarily for diagnostic purposes, they will increasingly play an important role in directing treatment, genetic counseling, and family planning.
- Published
- 2021
- Full Text
- View/download PDF
25. Revealing hidden genetic diagnoses in the ocular anterior segment disorders.
- Author
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Ma A, Yousoof S, Grigg JR, Flaherty M, Minoche AE, Cowley MJ, Nash BM, Ho G, Gayagay T, Lai T, Farnsworth E, Hackett EL, Fisk K, Wong K, Holman KJ, Jenkins G, Cheng A, Martin F, Karaconji T, Elder JE, Enriquez A, Wilson M, Amor DJ, Stutterd CA, Kamien B, Nelson J, Dinger ME, Bennetts B, and Jamieson RV
- Subjects
- ADAMTS Proteins, Anterior Eye Segment, Cytochrome P-450 CYP1B1 genetics, Forkhead Transcription Factors genetics, Humans, Mutation, Pedigree, Eye Abnormalities diagnosis, Eye Abnormalities genetics, Eye Diseases, Hereditary diagnosis, Eye Diseases, Hereditary genetics
- Abstract
Purpose: Ocular anterior segment disorders (ASDs) are clinically and genetically heterogeneous, and genetic diagnosis often remains elusive. In this study, we demonstrate the value of a combined analysis protocol using phenotypic, genomic, and pedigree structure data to achieve a genetic conclusion., Methods: We utilized a combination of chromosome microarray, exome sequencing, and genome sequencing with structural variant and trio analysis to investigate a cohort of 41 predominantly sporadic cases., Results: We identified likely causative variants in 54% (22/41) of cases, including 51% (19/37) of sporadic cases and 75% (3/4) of cases initially referred as familial ASD. Two-thirds of sporadic cases were found to have heterozygous variants, which in most cases were de novo. Approximately one-third (7/22) of genetic diagnoses were found in rarely reported or recently identified ASD genes including PXDN, GJA8, COL4A1, ITPR1, CPAMD8, as well as the new phenotypic association of Axenfeld-Rieger anomaly with a homozygous ADAMTS17 variant. The remainder of the variants were in key ASD genes including FOXC1, PITX2, CYP1B1, FOXE3, and PAX6., Conclusions: We demonstrate the benefit of detailed phenotypic, genomic, variant, and segregation analysis to uncover some of the previously "hidden" heritable answers in several rarely reported and newly identified ocular ASD-related disease genes.
- Published
- 2020
- Full Text
- View/download PDF
26. Financial analysis of telecardiology used in a correctional setting.
- Author
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McCue MJ, Hampton CL, Malloy W, Fisk KJ, Dixon L, and Neece A
- Subjects
- Cost Savings, Cost-Benefit Analysis, Health Services Research, Humans, Remote Consultation statistics & numerical data, Transportation economics, Virginia, Cardiology economics, Health Care Costs statistics & numerical data, Prisons, Remote Consultation economics
- Abstract
The aim of this study is to evaluate the cost savings of 3 years of telecardiology used in a prison. This study compares the cost per visit of providing cardiology services by telemedicine (telecardiology) to patients at Powhatan Correctional Center of the Virginia Department of Corrections (PCC) and the cost of providing traditional cardiology services at the cardiology clinic of the Medical College of Virginia Campus of Virginia Commonwealth University (MCV Campus). During 1996 to 1998, telecardiology visits increased from 24 per year to 86. In this study, lower use of telecardiology services in 1996 resulted in higher cost per visit of $189. This was $45 more than the cost of traditional cardiology in the cardiology clinic at the MCV Campus. In 1997 and 1998, however, higher utilization of telecardiology services decreased the cost per visit to $135 and $132, respectively. This resulted in a cost saving with telecardiology of $15 per visit in 1997 and $46 per visit in 1998. Because the vast proportion of telemedicine operating costs are fixed, increased utilization causes reduced cost per visit and results in a cost saving compared with providing these services via a non-telemedicine program.
- Published
- 2000
- Full Text
- View/download PDF
27. Cost-minimization analysis: A follow-up study of a telemedicine program.
- Author
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McCue MJ, Mazmanian PE, Hampton CL, Marks TK, Fisher EJ, Parpart F, Malloy WN, and Fisk KJ
- Subjects
- Cost Savings, Cost-Benefit Analysis, Follow-Up Studies, Health Services Accessibility, Humans, Liability, Legal economics, Patient Care economics, Prisoners, Remote Consultation economics, Transportation of Patients economics, Virginia, Telemedicine economics
- Abstract
Objective: To present the follow-up findings to a cost-benefit analysis of telemedicine subspecialty services provided between the Powhatan Correctional Center (PCC) of the Virginia Department of Corrections and the Medical College of Virginia Campus of Virginia Commonwealth University (MCV Campus)., Methods: Costs included those of operating the telemedicine system, transportation, litigation avoidance, and the medical care itself., Results: Over a 12-month study period, the total number of consults completed through telemedicine was 290. The cost per visit of treating inmates at the MCV Campus clinics was $401. The cost per visit of treating inmates at PCC via telemedicine was $387, a net saving of $14 per visit with the use of telemedicine., Conclusion: As a result of implementing telemedicine, the Department of Corrections for the State of Virginia was able to achieve a cost saving of $14 per visit. Nonmonetary cost savings, such as greater security and increased access to care, should be considered a net benefit as well.
- Published
- 1998
- Full Text
- View/download PDF
28. A review of gentamicin use in neonates.
- Author
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Fisk KL
- Subjects
- Gentamicins administration & dosage, Gentamicins adverse effects, Gentamicins pharmacokinetics, Humans, Infant, Newborn, Gentamicins therapeutic use, Gram-Negative Bacterial Infections drug therapy
- Abstract
Gram-negative sepsis contributes significantly to neonatal morbidity and mortality. Gentamicin is an aminoglycoside antibiotic used in the treatment of gram-negative infections. However, developmental differences of the neonate (compared with the older child or adult) influence the drug's disposition in the body. Administration, distribution, elimination, as well as susceptibility to toxicities may be altered in the neonatal period because of these pharmacokinetic differences. A literature review reveals pharmacokinetic differences of the neonate that affect gentamicin dosing. Nursing considerations affected by the developmental differences of the neonate include knowing appropriate dosages and routes of administration, pathophysiological and pharmacological conditions that affect gentamicin disposition, serum monitoring, and evaluation of adverse reactions and toxicities.
- Published
- 1993
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