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Young AE, Finno CJ. Current insights into equine neuroaxonal dystrophy/equine degenerative myeloencephalopathy. Vet J 2024:106129. [PMID: 38734404 DOI: 10.1016/j.tvjl.2024.106129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/06/2024] [Accepted: 05/07/2024] [Indexed: 05/13/2024]
Abstract
Equine neuroaxonal dystrophy/equine degenerative myeloencephalopathy (eNAD/EDM) is an inherited neurodegenerative disease associated with vitamin E deficiency in the first year of life. It is the second most common cause of spinal ataxia in horses euthanized for neurologic disease. Equine NAD/EDM is characterized by sudden onset of neurologic signs including symmetric ataxia (> grade 2/5), wide-base stance at rest, and proprioceptive defects. There are currently no antemortem tests for eNAD/EDM in any breed. Conclusive diagnosis requires postmortem histologic evaluation of the brainstem and spinal cord at necropsy. Research studies on antemortem biomarker and genetic testing are ongoing. The development of a genetic test for eNAD/EDM would have widespread impact, even if it were breed specific. Currently, the best approach to eNAD/EDM is to focus on preventing cases by providing pregnant mares and foals with access to pasture. Alternatively, dams' diets can be supplemented with high doses of water-soluble RRR-α-tocopherol during the last trimester of gestation, with continued supplementation of foals through the first two years of life. It is important to measure horses' baseline serum vitamin E levels prior to supplementing. While considered generally safe, oversupplementation of vitamin E is possible and can lead to coagulopathies.
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Affiliation(s)
- Amy E Young
- Center for Equine Health, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Carrie J Finno
- Center for Equine Health, School of Veterinary Medicine, University of California, Davis, CA, USA; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, USA.
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Young AE, Staruch RMT, Dziewulski P. Why is priority setting important for global burn care research? Burns 2022; 48:1035-1039. [PMID: 35525771 DOI: 10.1016/j.burns.2022.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 04/12/2022] [Indexed: 12/15/2022]
Abstract
The use of robust evidence is a key component of providing high quality care to patients. Synthesised evidence to support clinical decision-making is lacking for many aspects of clinical burn care. Identifying the most important areas of care that lack high quality evidence and requires research is necessary, as funding for primary research is limited. Priority setting research studies are a joint endeavour between patients, carers and clinicians to identify and rank topics for research in a healthcare area in order to reduce research waste. Such an exercise has yet to be undertaken in burns. The aim of this paper is to outline the importance of research prioritisation in burn care, to discuss how it facilitates the maximum benefit from limited research funding and to explain the methodologies used.
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Affiliation(s)
- A E Young
- Population Health Sciences, Bristol Medical School, University of Bristol, UK.
| | - R M T Staruch
- Department of Engineering Science, University of Oxford, Oxford, UK
| | - P Dziewulski
- St Andrews Centre for Burns & Plastic Surgery, Chelmsford, UK
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Davies P, Davies AK, Kirkham JJ, Young AE. Secondary analysis of data from a core outcome set for burns demonstrated the need for involvement of lower income countries. J Clin Epidemiol 2021; 144:56-71. [PMID: 34906674 PMCID: PMC9094759 DOI: 10.1016/j.jclinepi.2021.12.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/17/2021] [Accepted: 12/07/2021] [Indexed: 11/08/2022]
Abstract
Objective To compare the views of participants from different income-status countries on outcome selection for a burn care Core Outcome Set (COS). Methods A retrospective analysis of data collected during a two round Delphi survey to prioritise the most important outcomes in burn care research. Results There was considerable agreement between participants from low- and middle-income countries (LMICs) and high-income countries (HICs) across outcomes. The groups agreed on 91% of 88 outcomes in round 1 and 92% of 100 in round 2. In cases of discordance, the consensus of participants from LMICs was to include the outcome and for participants from HICs to exclude. There was also considerable agreement between the groups for the top-ten ranking outcomes. Discordance in outcome prioritisation gives an insight into the different values clinicians from LMICs place on outcomes compared to those from HICs. Limitations of the study were that outcome rankings from international patients were not available. Healthcare professionals from LMICs were not involved in the final consensus meeting. Conclusion COS developers should consider the need for a COS to be global at protocol stage. Global COS should include equal representation from both LMICs and HICs at all stages of development.
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Affiliation(s)
- P Davies
- Bristol Centre for Surgical Research, Bristol Biomedical Research Centre, Population Health Sciences, University of Bristol, United Kingdom
| | - A K Davies
- Centre for Academic Child Health, University of Bristol, United Kingdom
| | - J J Kirkham
- Centre for Biostatistics, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom
| | - A E Young
- Bristol Centre for Surgical Research, Bristol Biomedical Research Centre, Population Health Sciences, University of Bristol, United Kingdom.
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Trott JF, Young AE, McNabb BR, Yang X, Bishop TF, Van Eenennaam AL. 19 Comparative Evaluation of Human-edible Animal Products Derived from Offspring of Genome Edited and Control Cattle. J Anim Sci 2021. [DOI: 10.1093/jas/skab235.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Risk assessments of genetically modified (GM) animals include evaluating whether milk and meat derived from the GM animal is as nutritious to humans and/or animals as traditionally-bred animals. The underlying assumption of this comparative approach is that traditionally-bred animals have a well-established history of safe use. The goal of this project was to provide empirical data on the development and nutritional composition of animal products derived from the offspring of a genome edited dairy bull, homozygous for the dominant PC Celtic POLLED allele. The bull was crossed with horned Hereford (HH) cows (pp) to obtain five male and one female heterozygous hornless (RC) calves. Hereford, Angus and Holstein bulls were also bred to Hereford cows to produce five HH calves, two polled Angus/Hereford (AH) calves, and three horned Holstein/Hereford (HO) calves (with 25% genetic identity to the hornless offspring), respectively as contemporary controls. Weights were recorded at 8 months, 1 year and slaughter (n = 9–16). Following calving, individual quarters of the RC heifer (RC.calf1), one HO heifer (HO.calf2), two horned HH heifers, and one contemporaneous hornless AH cow (3113) were milked at varying timepoints during the first seven weeks of lactation. Meat samples were collected from the 6 hornless RC calves and 3 horned HO comparator offspring after slaughter. Proximate analysis was conducted for meat and milk samples. Cattle that inherited a POLLED allele from the genome-edited bull showed no differences in their overall growth (Figure 1) or meat composition (Figure 2) when compared to contemporary controls. Milk composition varied between animals and by days in milk (DIM), although values were within the normal range reported in peer-reviewed literature (Figure 3). Bovine milk composition is known to be influenced by breed, nutrition, parity, and DIM, making it difficult to obtain appropriate comparators in experiments with a limited number of GM animals.
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Nerhood KJ, James ER, Hardin A, Bray JE, Hines TS, Young AE, Bhavnani D. Screening Programs for SARS-CoV-2 Infections on a University Campus - Austin, Texas, September 30-November 30, 2020. MMWR Morb Mortal Wkly Rep 2021; 70:1201-1205. [PMID: 34473686 PMCID: PMC8422875 DOI: 10.15585/mmwr.mm7035a4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Young AE, Kemp JF, Uhlson C, Westcott JL, Ali SA, Saleem S, Garcès A, Figueroa L, Somannavar MS, Goudar SS, Hambidge KM, Hendricks AE, Krebs NF. Improved first trimester maternal iodine status with preconception supplementation: The Women First Trial. Matern Child Nutr 2021; 17:e13204. [PMID: 34036728 PMCID: PMC8476419 DOI: 10.1111/mcn.13204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 03/31/2021] [Accepted: 04/28/2021] [Indexed: 11/25/2022]
Abstract
Maternal iodine (I) status is critical in embryonic and foetal development. We examined the effect of preconception iodine supplementation on maternal iodine status and on birth outcomes. Non‐pregnant women in Guatemala, India and Pakistan (n ~ 100 per arm per site) were randomized ≥ 3 months prior to conception to one of three intervention arms: a multimicronutrient‐fortified lipid‐based nutrient supplement containing 250‐μg I per day started immediately after randomization (Arm 1), the same supplement started at ~12 weeks gestation (Arm 2) and no intervention supplement (Arm 3). Urinary I (μg/L) to creatinine (mg/dl) ratios (I/Cr) were determined at 12 weeks for Arm 1 versus Arm 2 (before supplement started) and 34 weeks for all arms. Generalized linear models were used to assess the relationship of I/Cr with arm and with newborn anthropometry. At 12 weeks gestation, adjusted mean I/Cr (μg/g) for all sites combined was significantly higher for Arm 1 versus Arm 2: (203 [95% CI: 189, 217] vs. 163 [95% CI: 152, 175], p < 0.0001). Overall adjusted prevalence of I/Cr < 150 μg/g was also lower in Arm 1 versus Arm 2: 32% (95% CI: 26%, 38%) versus 43% (95% CI: 37%, 49%) (p = 0.0052). At 34 weeks, adjusted mean I/Cr for Arm 1 (235, 95% CI: 220, 252) and Arm 2 (254, 95% CI: 238, 272) did not differ significantly but were significantly higher than Arm 3 (200, 95% CI: 184, 218) (p < 0.0001). Nominally significant positive associations were observed between I/Cr at 12 weeks and birth length and head circumference z‐scores (p = 0.028 and p = 0.005, respectively). These findings support the importance of first trimester iodine status and suggest need for preconception supplementation beyond salt iodization alone.
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Affiliation(s)
- Amy E Young
- Department of Pediatrics, Section of Nutrition, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Jennifer F Kemp
- Department of Pediatrics, Section of Nutrition, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Charis Uhlson
- Department of Pediatrics, Section of Nutrition, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Jamie L Westcott
- Department of Pediatrics, Section of Nutrition, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Sumera A Ali
- Department of Community Health Sciences, Aga Khan University, Karachi, Pakistan
| | - Sarah Saleem
- Department of Community Health Sciences, Aga Khan University, Karachi, Pakistan
| | - Ana Garcès
- Maternal Infant Health Center, Instituto de Nutrición de Centro América y Panamá (INCAP), Guatemala City, Guatemala
| | - Lester Figueroa
- Maternal Infant Health Center, Instituto de Nutrición de Centro América y Panamá (INCAP), Guatemala City, Guatemala
| | - Manjunath S Somannavar
- Women's and Children's Health Research Unit, KLE Academy of Higher Education & Research's JN Medical College, Belagavi, India
| | - Shivaprasad S Goudar
- Women's and Children's Health Research Unit, KLE Academy of Higher Education & Research's JN Medical College, Belagavi, India
| | - K Michael Hambidge
- Department of Pediatrics, Section of Nutrition, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Audrey E Hendricks
- Department of Mathematical & Statistical Sciences, University of Colorado Denver, Denver, Colorado, USA
| | - Nancy F Krebs
- Department of Pediatrics, Section of Nutrition, University of Colorado School of Medicine, Aurora, Colorado, USA
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Owen JR, Hennig SL, McNabb BR, Mansour TA, Smith JM, Lin JC, Young AE, Trott JF, Murray JD, Delany ME, Ross PJ, Van Eenennaam AL. One-step generation of a targeted knock-in calf using the CRISPR-Cas9 system in bovine zygotes. BMC Genomics 2021; 22:118. [PMID: 33581720 PMCID: PMC7881600 DOI: 10.1186/s12864-021-07418-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 01/31/2021] [Indexed: 12/31/2022] Open
Abstract
Background The homologous recombination (HR) pathway is largely inactive in early embryos prior to the first cell division, making it difficult to achieve targeted gene knock-ins. The homology-mediated end joining (HMEJ)-based strategy has been shown to increase knock-in efficiency relative to HR, non-homologous end joining (NHEJ), and microhomology-mediated end joining (MMEJ) strategies in non-dividing cells. Results By introducing gRNA/Cas9 ribonucleoprotein complex and a HMEJ-based donor template with 1 kb homology arms flanked by the H11 safe harbor locus gRNA target site, knock-in rates of 40% of a 5.1 kb bovine sex-determining region Y (SRY)-green fluorescent protein (GFP) template were achieved in Bos taurus zygotes. Embryos that developed to the blastocyst stage were screened for GFP, and nine were transferred to recipient cows resulting in a live phenotypically normal bull calf. Genomic analyses revealed no wildtype sequence at the H11 target site, but rather a 26 bp insertion allele, and a complex 38 kb knock-in allele with seven copies of the SRY-GFP template and a single copy of the donor plasmid backbone. An additional minor 18 kb allele was detected that looks to be a derivative of the 38 kb allele resulting from the deletion of an inverted repeat of four copies of the SRY-GFP template. Conclusion The allelic heterogeneity in this biallelic knock-in calf appears to have resulted from a combination of homology directed repair, homology independent targeted insertion by blunt-end ligation, NHEJ, and rearrangement following editing of the gRNA target site in the donor template. This study illustrates the potential to produce targeted gene knock-in animals by direct cytoplasmic injection of bovine embryos with gRNA/Cas9, although further optimization is required to ensure a precise single-copy gene integration event. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07418-3.
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Affiliation(s)
- Joseph R Owen
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Sadie L Hennig
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Bret R McNabb
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California - Davis, Davis, CA, USA
| | - Tamer A Mansour
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California - Davis, Davis, CA, USA.,Department of Clinical Pathology, School of Medicine, University of Mansoura, Mansoura, Egypt
| | - Justin M Smith
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Jason C Lin
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Amy E Young
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Josephine F Trott
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - James D Murray
- Department of Animal Science, University of California - Davis, Davis, CA, USA.,Department of Population Health and Reproduction, School of Veterinary Medicine, University of California - Davis, Davis, CA, USA
| | - Mary E Delany
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Pablo J Ross
- Department of Animal Science, University of California - Davis, Davis, CA, USA
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Hennig SL, Owen JR, Lin JC, Young AE, Ross PJ, Van Eenennaam AL, Murray JD. Evaluation of mutation rates, mosaicism and off target mutations when injecting Cas9 mRNA or protein for genome editing of bovine embryos. Sci Rep 2020; 10:22309. [PMID: 33339870 PMCID: PMC7749171 DOI: 10.1038/s41598-020-78264-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 11/19/2020] [Indexed: 12/11/2022] Open
Abstract
The CRISPR/Cas9 genome editing tool has the potential to improve the livestock breeding industry by allowing for the introduction of desirable traits. Although an efficient and targeted tool, the CRISPR/Cas9 system can have some drawbacks, including off-target mutations and mosaicism, particularly when used in developing embryos. Here, we introduced genome editing reagents into single-cell bovine embryos to compare the effect of Cas9 mRNA and protein on the mutation efficiency, level of mosaicism, and evaluate potential off-target mutations utilizing next generation sequencing. We designed guide-RNAs targeting three loci (POLLED, H11, and ZFX) in the bovine genome and saw a significantly higher rate of mutation in embryos injected with Cas9 protein (84.2%) vs. Cas9 mRNA (68.5%). In addition, the level of mosaicism was higher in embryos injected with Cas9 mRNA (100%) compared to those injected with Cas9 protein (94.2%), with little to no unintended off-target mutations detected. This study demonstrated that the use of gRNA/Cas9 ribonucleoprotein complex resulted in a high editing efficiency at three different loci in bovine embryos and decreased levels of mosaicism relative to Cas9 mRNA. Additional optimization will be required to further reduce mosaicism to levels that make single-step embryo editing in cattle commercially feasible.
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Affiliation(s)
- Sadie L Hennig
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Joseph R Owen
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Jason C Lin
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Amy E Young
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | - Pablo J Ross
- Department of Animal Science, University of California - Davis, Davis, CA, USA
| | | | - James D Murray
- Department of Animal Science, University of California - Davis, Davis, CA, USA.,Department of Population Health and Reproduction, University of California - Davis, Davis, CA, USA
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Owen JR, Henning SL, McNabb BR, Lin JC, Young AE, Murray JD, Ross PJ, Van Eenennaam AL. PSX-32 Late-Breaking Abstract: Production of a Gene Knock-In Bull Calf by Embryo-Mediated Genome Editing. J Anim Sci 2020. [DOI: 10.1093/jas/skaa278.628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Genome editing offers an opportunity to introduce targeted gene insertions into livestock breeding programs. Molecular geneticists have typically employed a donor repair template and the homologous recombination (HR) pathway in somatic cells to introduce gene knock-ins into livestock genomes, followed by cloning. Editing embryos directly to achieve targeted gene knock-ins is inefficient, especially for introducing large DNA sequences. Here we report using a one-step method to produce a gene knock-in bull calf by cytoplasmic microinjection of CRISPR/Cas9 reagents into a bovine embryo. In vitro fertilized one-cell bovine zygotes were injected with a gRNA/Cas9 ribonucleoprotein complex and homology mediated end joining donor template containing the sex determining region Y (SRY) gene, the green fluorescent protein (gfp) reporter gene driven by the SV40 promoter, and one kilobase homology arms targeting the H11 safe harbor locus on bovine chromosome 17. Seven-day blastocysts were evaluated using fluorescent microscopy, and nine green fluorescent embryos were transferred to synchronized recipients. Ultrasound evaluation at 35 days revealed one pregnancy. In April 2020, a healthy 50 kg male calf was born. DNA was extracted from placenta, blood and a fibroblast line derived from the calf and analyzed for SRY-GFP knock-in, as well as genotypic sex. PCR and Sanger sequencing revealed the biallelic edit of the target location on chromosome 17, with the insertion of three or seven copies of the SRY-GFP construct in addition to donor plasmid backbone, or a 26 base pair insertion, and an XY genotype. Future analysis of the XX offspring inheriting the SRY gene on chromosome 17 from this knock-in bull will reveal whether inheritance of the bovine SRY gene is sufficient to trigger the male developmental pathway in cattle.
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Young AE, Thet NT, Mercer-Chalmers J, Greenwood RJ, Coy K, Booth S, Sack A, Jenkins ATA. The SPaCE diagnostic: a pilot study to test the accuracy of a novel point of care sensor for point of care detection of burn wound infection. J Hosp Infect 2020; 106:726-733. [PMID: 33022335 DOI: 10.1016/j.jhin.2020.09.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/28/2020] [Accepted: 09/28/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Wound infection in burn patients is common and has an impact on outcomes. There is no objective method to diagnose infection at point of care (PoC). Early diagnosis prevents progression to sepsis. Diagnostic subjectivity supports over-diagnosis, unnecessary hospitalization, and antibiotic overuse. AIM This pilot study aimed to investigate the accuracy of a novel PoC wound infection diagnostic in burn patients. METHODS We produced, and in vitro tested, a PoC diagnostic for early wound infection diagnosis. The prototype SPaCE diagnostic uses a patented lipid vesicle suspension into which a clinical swab is placed. The diagnostic delivers a colour-response to Staphylococcus aureus, Pseudomonas aeruginosa, Candida species and Enterococcus faecalis at toxin release. A pilot clinical diagnostic accuracy study was undertaken. The reference standard was a retrospective decision made by an expert clinical panel using routinely available data. FINDINGS Data was available from 33 of 34 patients. Of these, 52% were considered to have a wound infection, 42% not, and two (6%) were equivocal. The diagnostic results showed 24% were infected, 42% were not and 33% produced intermediate results. Agreement between clinical judgement and diagnostic result, assessed using a weighted Kappa, was 0.591 suggesting moderate agreement. If the intermediate results were excluded, 22 sets of data with definitive results achieved a Kappa statistic of 0.81 suggesting 'almost perfect' agreement. Sensitivity and specificity were 57% (8/14) and 71% (12/17), respectively. CONCLUSION This pilot study provided evidence that the SPaCE diagnostic could provide valuable and timely data to support clinical decision-making at PoC for wound infection.
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Affiliation(s)
- A E Young
- Children's Burn Research Centre, University Hospital Bristol and Weston NHS Foundation Trust, Bristol, UK; Bristol Centre for Surgical Research, Bristol Medical School University of Bristol, Bristol, UK.
| | - N T Thet
- Chemistry Department, University of Bath, Bath, UK
| | | | - R J Greenwood
- Research Design Service, Education Centre, University Hospitals Bristol and Weston NHS Foundation Trust, Bristol, UK
| | - K Coy
- Bristol Centre for Surgical Research, Bristol Medical School University of Bristol, Bristol, UK
| | - S Booth
- Queen Victoria Hospital NHS Foundation Trust, East Grinstead, UK
| | - A Sack
- Southmead Hospital, North Bristol NHS Foundation Trust, Bristol, UK
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Owen JR, Hennig SL, McNabb BR, Lin JC, Young AE, Murray JD, Ross PJ, Van Eenennaam AL. Harnessing endogenous repair mechanisms for targeted gene knock-in of bovine embryos. Sci Rep 2020; 10:16031. [PMID: 32994506 PMCID: PMC7525238 DOI: 10.1038/s41598-020-72902-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 09/04/2020] [Indexed: 01/06/2023] Open
Abstract
Introducing useful traits into livestock breeding programs through gene knock-ins has proven challenging. Typically, targeted insertions have been performed in cell lines, followed by somatic cell nuclear transfer cloning, which can be inefficient. An alternative is to introduce genome editing reagents and a homologous recombination (HR) donor template into embryos to trigger homology directed repair (HDR). However, the HR pathway is primarily restricted to actively dividing cells (S/G2-phase) and its efficiency for the introduction of large DNA sequences in zygotes is low. The homology-mediated end joining (HMEJ) approach has been shown to improve knock-in efficiency in non-dividing cells and to harness HDR after direct injection of embryos. The knock-in efficiency for a 1.8 kb gene was contrasted when combining microinjection of a gRNA/Cas9 ribonucleoprotein complex with a traditional HR donor template or an HMEJ template in bovine zygotes. The HMEJ template resulted in a significantly higher rate of gene knock-in as compared to the HR template (37.0% and 13.8%; P < 0.05). Additionally, more than a third of the knock-in embryos (36.9%) were non-mosaic. This approach will facilitate the one-step introduction of gene constructs at a specific location of the bovine genome and contribute to the next generation of elite cattle.
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Affiliation(s)
- Joseph R Owen
- Department of Animal Science, University of CA - Davis, Davis, CA, USA
| | - Sadie L Hennig
- Department of Animal Science, University of CA - Davis, Davis, CA, USA
| | - Bret R McNabb
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of CA - Davis, Davis, CA, USA
| | - Jason C Lin
- Department of Animal Science, University of CA - Davis, Davis, CA, USA
| | - Amy E Young
- Department of Animal Science, University of CA - Davis, Davis, CA, USA
| | - James D Murray
- Department of Animal Science, University of CA - Davis, Davis, CA, USA
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of CA - Davis, Davis, CA, USA
| | - Pablo J Ross
- Department of Animal Science, University of CA - Davis, Davis, CA, USA
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Young AE, Mansour TA, McNabb BR, Owen JR, Trott JF, Brown CT, Van Eenennaam AL. Genomic and phenotypic analyses of six offspring of a genome-edited hornless bull. Nat Biotechnol 2020; 38:225-232. [PMID: 31591551 PMCID: PMC7007412 DOI: 10.1038/s41587-019-0266-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 08/28/2019] [Indexed: 12/20/2022]
Abstract
Genome editing followed by reproductive cloning was previously used to produce two hornless dairy bulls. We crossed one genome-edited dairy bull, homozygous for the dominant PC Celtic POLLED allele, with horned cows (pp) and obtained six heterozygous (PCp) polled calves. The calves had no horns and were otherwise healthy and phenotypically unremarkable. We conducted whole-genome sequencing of all animals using an Illumina HiSeq4000 to achieve ~20× coverage. Bioinformatics analyses revealed the bull was a compound heterozygote, carrying one naturally occurring PC Celtic POLLED allele and an allele containing an additional introgression of the homology-directed repair donor plasmid along with the PC Celtic allele. These alleles segregated in the offspring of this bull, and inheritance of either allele produced polled calves. No other unintended genomic alterations were observed. These data can be used to inform conversations in the scientific community, with regulatory authorities and with the public around 'intentional genomic alterations' and future regulatory actions regarding genome-edited animals.
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Affiliation(s)
- Amy E Young
- Department of Animal Science, University of California, Davis, CA, USA
| | - Tamer A Mansour
- Department of Clinical Pathology, School of Medicine, University of Mansoura, Mansoura, Egypt
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Bret R McNabb
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Joseph R Owen
- Department of Animal Science, University of California, Davis, CA, USA
| | - Josephine F Trott
- Department of Animal Science, University of California, Davis, CA, USA
| | - C Titus Brown
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, USA
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Young AE, Mansour TA, McNabb BR, Owen JR, Trott JF, Brown CT, Van Eenennaam AL. Author Correction: Genomic and phenotypic analyses of six offspring of a genome-edited hornless bull. Nat Biotechnol 2020; 38:245. [PMID: 31992864 PMCID: PMC7007411 DOI: 10.1038/s41587-020-0423-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Amy E Young
- Department of Animal Science, University of California, Davis, CA, USA
| | - Tamer A Mansour
- Department of Clinical Pathology, School of Medicine, University of Mansoura, Mansoura, Egypt.,Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Bret R McNabb
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Joseph R Owen
- Department of Animal Science, University of California, Davis, CA, USA
| | - Josephine F Trott
- Department of Animal Science, University of California, Davis, CA, USA
| | - C Titus Brown
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, USA
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McPherson T, Exton LS, Biswas S, Creamer D, Dziewulski P, Newell L, Tabor KL, Wali GN, Walker G, Walker R, Walker S, Young AE, Mohd Mustapa MF, Murphy R. British Association of Dermatologists' guidelines for the management of Stevens-Johnson syndrome/toxic epidermal necrolysis in children and young people, 2018. Br J Dermatol 2019; 181:37-54. [PMID: 30829411 DOI: 10.1111/bjd.17841] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2019] [Indexed: 12/12/2022]
Affiliation(s)
- T McPherson
- Oxford University Hospitals NHS Foundation Trust, Old Road, Headington, Oxford, OX3 7LE, U.K
| | - L S Exton
- British Association of Dermatologists, Willan House, 4 Fitzroy Square, London, W1T 5HQ, U.K
| | - S Biswas
- Manchester University Hospitals NHS Foundation Trust, Oxford Road, Manchester, M13 9WL, U.K
| | - D Creamer
- Department of Dermatology, King's Hospital NHS Foundation Trust, London, SE5 9RS, U.K
| | - P Dziewulski
- St Andrews Centre for Plastic Surgery and Burns, Mid Essex Hospital Services NHS Trust, Chelmsford, CM1 7ET, U.K
| | - L Newell
- Bristol Royal Hospital for Children, University Hospitals Bristol NHS Foundation Trust, Bristol, BS2 8BJ, U.K
| | - K L Tabor
- Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, U.K
| | - G N Wali
- Oxford University Hospitals NHS Foundation Trust, Old Road, Headington, Oxford, OX3 7LE, U.K
| | | | | | | | - A E Young
- Bristol Royal Hospital for Children, University Hospitals Bristol NHS Foundation Trust, Bristol, BS2 8BJ, U.K
| | - M F Mohd Mustapa
- British Association of Dermatologists, Willan House, 4 Fitzroy Square, London, W1T 5HQ, U.K
| | - R Murphy
- Sheffield Teaching Hospitals NHS Foundation Trust, Glossop Road, Sheffield, S10 2JF, U.K.,Department of Dermatology, Sheffield Children's NHS Foundation Trust, Western Bank, Sheffield, S10 2TH, U.K.,University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
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Soler DC, Young AE, Vahedi-Faridi A, McCormick TS. Generation of Flp-in tm-ready DG44 and Lec 3.2.8.1 CHO cell lines for quick and easy constitutive protein expression. Biotechniques 2018; 65:41-46. [PMID: 30014730 DOI: 10.2144/btn-2018-0075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The well-characterized cell line Chinese hamster ovary (CHO) has been used to produce numerous biopharmaceuticals and is an important tool for basic research. However, introducing foreign DNA into specially modified CHO cells such as DG44 and Lec 3.2.8.1 can sometimes be an arduous process. Here we show that the Flp-intm plasmid can be modified to produce a fluorescent tracer protein tag (mCherrytm) as a fusion reporter, to allow for the rapid selection of single-cell sorted, isogenic Flp-intm-ready DG44 and Lec 3.2.8.1 cell lines. These two cell lines are stable and viable and may be useful for applications such as antibody production and crystallographic studies. Here we provide key details on how the modified pFRT/CherryZeo plasmid may be used to incorporate Flp-intm technology into virtually any desired target cell line in a fast, safe and reliable manner.
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Affiliation(s)
- D C Soler
- The Department of Neurosurgery, 2109 Adelbert Road, Cleveland, OH 44106, USA
- Case Western Reserve University School of Medicine, 2109 Adelbert Road, Cleveland, OH 44106, USA
| | - A E Young
- Case Western Reserve University School of Medicine, 2109 Adelbert Road, Cleveland, OH 44106, USA
- The Department of Dermatology, 2109 Adelbert Road, OH, USA
- The Skin Diseases Research Center, 2109 Adelbert Road, OH, USA
| | - A Vahedi-Faridi
- Department of Physiology & Biophysics, 2109 Adelbert Road, OH, USA
| | - T S McCormick
- Case Western Reserve University School of Medicine, 2109 Adelbert Road, Cleveland, OH 44106, USA
- The Department of Dermatology, 2109 Adelbert Road, OH, USA
- The Skin Diseases Research Center, 2109 Adelbert Road, OH, USA
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Whale K, Ingram JC, George S, Spickett-Jones F, Sack A, Young AE. Exploring the acceptability of using low-friction bedding for patients with burns: Qualitative results from the SILKIE study. Burns 2018; 44:1251-1258. [PMID: 29753452 DOI: 10.1016/j.burns.2018.03.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 10/16/2022]
Abstract
BACKGROUND Skin grafts following deep burns are needed to ensure healing. Grafts that fail and require re-grafting cause significant distress to patients and additional costs for the NHS. Shearing, which leads to graft loss, may be reduced through the use of low-friction bedding. A feasibility study was conducted to assess proof of concept for the use of low-friction bedding for patients with burns. Patient, parent and staff views on the acceptability of this material were explored through semi-structured interviews. METHOD Patient views were gathered through telephone interviews (n=17; 11 adult patients and 6 parents of child patients). One patient completed the questionnaire in written form because of hearing difficulties. Staff views were gathered at two time points: at the start of the study through open-ended questionnaires (n=20) and at the end of the study through focus group (n=12) and telephone interviews (n=3). Data were analysed using framework analysis. RESULTS Three themes were identified describing both patient and staff views of the sheets: Slippery feel of the sheets; leaking wounds and sheet changes; and movement and friction. Overall patients' views of the sheets were positive; they were comfortable to use the sheets and experienced reduced pain and itching. However, issues related to the slipperiness were highlighted. Staff views were largely negative because of difficulty in use, lack of absorbency, and increased workload. CONCLUSION The use of low-friction bedding is acceptable to patients undergoing a skin graft following a burn injury; however, problems related to sliding down the bed and soiling of sheets need addressing. Staff were supportive of the concept of low-friction bedding; however, they reported significant challenges in day-to-day use of sheets. Low-friction bedding presents a promising alternative to standard cotton sheets for patients with burns and those at risk of pressure sores; however, further work is needed to address current challenges in use.
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Affiliation(s)
- K Whale
- Centre for Child and Adolescent Health, Bristol Medical School, Population Health Sciences, University of Bristol, United Kingdom.
| | - J C Ingram
- Centre for Child and Adolescent Health, Bristol Medical School, Population Health Sciences, University of Bristol, United Kingdom
| | - S George
- Bristol Royal Children's Hospital, University Hospitals Bristol NHS Foundation Trust, United Kingdom
| | - F Spickett-Jones
- Bristol Royal Children's Hospital, University Hospitals Bristol NHS Foundation Trust, United Kingdom
| | - A Sack
- Southmead Hospital Bristol, North Bristol NHS Trust, United Kingdom
| | - A E Young
- Bristol Royal Children's Hospital, University Hospitals Bristol NHS Foundation Trust, United Kingdom
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Abstract
Although day case surgery is recommended, its widespread feasibility in an urban environment is unclear. We studied 100 consecutive unselected patients admitted for surgical procedures considered to be suitable for day case surgery. Their age, fitness and social details were recorded and they were asked both before surgery and after discharge by a postal questionnaire, whether they would have preferred treatment as an outpatient. There were 47 men and 53 women with a mean age of 42.5 years. Ninety-six were considered to be medically fit for day case surgery but 10 patients lived alone, seven had no suitable companion, 22 had too many stairs to climb, 13 lived too far from the hospital and two could not provide a lift home. Thus 58 of the patients were unsuitable for day case surgery. Seventy-eight of the patients replied to the postal questionnaire. Before the operation 51 patients preferred the idea of day care but only 14 felt the same way afterwards. The single postoperative complication was one case of acute retention after a hernia repair. In our experience, over half the patients initially deemed suitable for day case surgery would be unsuitable.
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Affiliation(s)
- A Senapati
- Department of Surgery, St Thomas' Hospital, London
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Vinas EK, White AB, Rogers RG, Ridgeway JJ, Young AE. Developing Best Clinical Practices Through Outcomes Improvement: An Ongoing Quality Improvement Curriculum for Faculty and Residents. MedEdPORTAL 2018; 14:10676. [PMID: 30800876 PMCID: PMC6342518 DOI: 10.15766/mep_2374-8265.10676] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 01/22/2018] [Indexed: 05/30/2023]
Abstract
Introduction Practice patterns in clinical learning environments are an important predictor of the patient care quality that residents will deliver after training. The Accreditation Council for Graduate Medical Education (ACGME) Clinical Learning Environment Review Evaluation Committee reported that from 2012-2015, residents and fellows rarely engaged in quality improvement (QI) activities. A QI curriculum was created for OB-GYN faculty and trainees to develop and implement best practices and study the resulting improvement in patient outcomes. Methods Educational leadership in the Dell Medical School Department of Women's Health designed a five-stage curriculum: (1) learning module describing the curriculum's rationale, (2) clinical practice proposal development, (3) implementation/data analysis for selected proposals, (4) dissemination of proposals and outcomes during a live forum, and (5) evaluation. PGY1 and PGY4 OB-GYN residents collaborated in dyads with selected faculty mentors to draft evidence-based proposals. Dyads identified suggested outcomes measures to be analyzed postimplementation. Remaining faculty analyzed outcomes from the previous year's proposals with PGY2 and PGY3 OB-GYN residents. Results Forum participants, including faculty, residents, nursing staff, and private obstetrician-gynecologists, evaluated the activity. In 2017, 15 (35%) completed the evaluation. All respondents intended to change their practice based on findings. In addition, the 2016 ACGME survey indicated significant increases in faculty perception of resident QI from 58% in 2014-2015 to 89% in 2015-2016 (p = .01) and in collaboration in scholarly activity from 50% to 85% (p < .01). Discussion This curriculum was effective in engaging OB-GYN faculty and residents in formalized problem-based learning to address QI.
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Affiliation(s)
- Emily K. Vinas
- Assistant Professor, Department of Women's Health, University of Texas at Austin Dell Medical School
- Director of Educational Strategy and Program Development, Department of Women's Health, University of Texas at Austin Dell Medical School
| | - Amanda B. White
- Assistant Professor, Department of Women's Health, University of Texas at Austin Dell Medical School
| | - Rebecca G. Rogers
- Professor, Department of Women's Health, University of Texas at Austin Dell Medical School
- Associate Chair of Clinical Integration and Operations, Department of Women's Health, University of Texas at Austin Dell Medical School
| | - Jeffrey J. Ridgeway
- Clinical Assistant Professor, Department of Women's Health, University of Texas at Austin Dell Medical School
| | - Amy E. Young
- Professor, Department of Women's Health, University of Texas at Austin Dell Medical School
- Chair, Department of Women's Health, University of Texas at Austin Dell Medical School
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Young AE. Value-Based Medical Education in Obstetrics and Gynecology: A Paradigm Shift. Obstet Gynecol 2017; 130:684-685. [PMID: 28885407 DOI: 10.1097/aog.0000000000002273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Amy E Young
- Dr. Young is from the Department of Women's Health at the University of Texas at Austin Dell Medical School, Austin, Texas;
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Abstract
Products such as meat, milk, and eggs from animals that have consumed genetically engineered (GE) feed are not currently subject to mandatory GE labeling requirements. Some voluntary "non-genetically modified organism" labeling has been associated with such products, indicating that the animals were not fed GE crops, as there are no commercialized GE food animals. This review summarizes the available scientific literature on the detection of dietary DNA and protein in animal products and briefly discusses the implications of mandatory GE labeling for products from animals that have consumed GE feed. Because glyphosate is used on some GE crops, the available studies on glyphosate residues in animal products are also reviewed. In GE crops, recombinant DNA (rDNA) makes up a small percentage of the plant's total DNA. The final amount of DNA in food/feed depends on many factors including the variable number and density of cells in the edible parts, the DNA-containing matrix, environmental conditions, and the specific transgenic event. Processing treatments and animals' digestive systems degrade DNA into small fragments. Available reports conclude that endogenous DNA and rDNA are processed in exactly the same way in the gastrointestinal tract and that they account for a very small proportion of food intake by weight. Small pieces of high copy number endogenous plant genes have occasionally been detected in meat and milk. Similarly sized pieces of rDNA have also been identified in meat, primarily fish, although detection is inconsistent. Dietary rDNA fragments have not been detected in chicken or quail eggs or in fresh milk from cows or goats. Collectively, studies have failed to identify full-length endogenous or rDNA transcripts or recombinant proteins in meat, milk, or eggs. Similarly, because mammals do not bioaccumulate glyphosate and it is rapidly excreted, negligible levels of glyphosate in cattle, pig and poultry meat, milk, and eggs have been reported. Despite consumer concern about the presence of trace concentrations of glyphosate that might have been applied to feed crops and/or the presence of rDNA or recombinant proteins in meat, milk, and eggs, the available data do not provide evidence to suggest that products from animals that have consumed approved GE feed crops differ in any distinguishable way from those derived from animals fed conventional feed or that products from animals fed GE feedstuffs pose novel health risks.
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Pisansky MT, Young AE, O'Connor MB, Gottesman II, Bagchi A, Gewirtz JC. Mice lacking the chromodomain helicase DNA-binding 5 chromatin remodeler display autism-like characteristics. Transl Psychiatry 2017; 7:e1152. [PMID: 28608855 PMCID: PMC5537637 DOI: 10.1038/tp.2017.111] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 04/20/2017] [Indexed: 12/12/2022] Open
Abstract
Although autism spectrum disorders (ASDs) share a core set of nosological features, they exhibit substantial genetic heterogeneity. A parsimonious hypothesis posits that dysregulated epigenetic mechanisms represent common pathways in the etiology of ASDs. To investigate this hypothesis, we generated a novel mouse model resulting from brain-specific deletion of chromodomain helicase DNA-binding 5 (Chd5), a chromatin remodeling protein known to regulate neuronal differentiation and a member of a gene family strongly implicated in ASDs. RNA sequencing of Chd5-/- mouse forebrain tissue revealed a preponderance of changes in expression of genes important in cellular development and signaling, sociocommunicative behavior and ASDs. Pyramidal neurons cultured from Chd5-/- cortex displayed alterations in dendritic morphology. Paralleling ASD nosology, Chd5-/- mice exhibited abnormal sociocommunicative behavior and a strong preference for familiarity. Chd5-/- mice further showed deficits in responding to the distress of a conspecific, a mouse homolog of empathy. Thus, dysregulated chromatin remodeling produces a pattern of transcriptional, neuronal and behavioral effects consistent with the presentation of ASDs.
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Affiliation(s)
- M T Pisansky
- Graduate Program in Neuroscience University of Minnesota —Twin Cities, Minneapolis, MN, USA
| | - A E Young
- Department of Psychology, University of Minnesota —Twin Cities, Minneapolis, MN, USA
| | - M B O'Connor
- Department of Genetics, Cell Biology, and Development, University of Minnesota —Twin Cities, Minneapolis, MN, USA
| | - I I Gottesman
- Department of Psychology, University of Minnesota —Twin Cities, Minneapolis, MN, USA
| | - A Bagchi
- Department of Genetics, Cell Biology, and Development, University of Minnesota —Twin Cities, Minneapolis, MN, USA
| | - J C Gewirtz
- Department of Psychology, University of Minnesota —Twin Cities, Minneapolis, MN, USA
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Weber KL, Welly BT, Van Eenennaam AL, Young AE, Porto-Neto LR, Reverter A, Rincon G. Identification of Gene Networks for Residual Feed Intake in Angus Cattle Using Genomic Prediction and RNA-seq. PLoS One 2016; 11:e0152274. [PMID: 27019286 PMCID: PMC4809598 DOI: 10.1371/journal.pone.0152274] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 03/12/2016] [Indexed: 11/17/2022] Open
Abstract
Improvement in feed conversion efficiency can improve the sustainability of beef cattle production, but genomic selection for feed efficiency affects many underlying molecular networks and physiological traits. This study describes the differences between steer progeny of two influential Angus bulls with divergent genomic predictions for residual feed intake (RFI). Eight steer progeny of each sire were phenotyped for growth and feed intake from 8 mo. of age (average BW 254 kg, with a mean difference between sire groups of 4.8 kg) until slaughter at 14-16 mo. of age (average BW 534 kg, sire group difference of 28.8 kg). Terminal samples from pituitary gland, skeletal muscle, liver, adipose, and duodenum were collected from each steer for transcriptome sequencing. Gene expression networks were derived using partial correlation and information theory (PCIT), including differentially expressed (DE) genes, tissue specific (TS) genes, transcription factors (TF), and genes associated with RFI from a genome-wide association study (GWAS). Relative to progeny of the high RFI sire, progeny of the low RFI sire had -0.56 kg/d finishing period RFI (P = 0.05), -1.08 finishing period feed conversion ratio (P = 0.01), +3.3 kg^0.75 finishing period metabolic mid-weight (MMW; P = 0.04), +28.8 kg final body weight (P = 0.01), -12.9 feed bunk visits per day (P = 0.02) with +0.60 min/visit duration (P = 0.01), and +0.0045 carcass specific gravity (weight in air/weight in air-weight in water, a predictor of carcass fat content; P = 0.03). RNA-seq identified 633 DE genes between sire groups among 17,016 expressed genes. PCIT analysis identified >115,000 significant co-expression correlations between genes and 25 TF hubs, i.e. controllers of clusters of DE, TS, and GWAS SNP genes. Pathway analysis suggests low RFI bull progeny possess heightened gut inflammation and reduced fat deposition. This multi-omics analysis shows how differences in RFI genomic breeding values can impact other traits and gene co-expression networks.
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Affiliation(s)
- Kristina L Weber
- VMRD Genetics R&D, Zoetis Inc., Kalamazoo, MI, United States of America
| | - Bryan T Welly
- Department of Animal Science, University of California Davis, Davis, CA, United States of America
| | - Alison L Van Eenennaam
- Department of Animal Science, University of California Davis, Davis, CA, United States of America
| | - Amy E Young
- Department of Animal Science, University of California Davis, Davis, CA, United States of America
| | | | - Antonio Reverter
- CSIRO Agriculture, Queensland Bioscience Precinct, St. Lucia, QLD, Australia
| | - Gonzalo Rincon
- VMRD Genetics R&D, Zoetis Inc., Kalamazoo, MI, United States of America
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Goggin MJ, Black DA, Wells CP, Collins RE, Coakley AJ, Nunan TO, Wolfe JH, Gaunt JI, Croft DN, Young AE. Thallium-201 and technetium-99m subtraction scanning of the parathyroid glands in patients with hyperparathyroidism due to renal osteodystrophy. Contrib Nephrol 2015; 56:196-9. [PMID: 3038464 DOI: 10.1159/000413805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Kaye AD, McDowell JL, Diaz JH, Buras JA, Young AE, Urman RD. Effective strategies in improving operating room case delays and cancellations at an academic medical center. J Med Pract Manage 2015; 30:24-29. [PMID: 26062313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND Traditionally, the operating room (OR) in an academic medical center has faced numerous challenges to effective clinical productivity, including additional missions of teaching and research. Level 1 trauma poses more challenges related to the need for additional specialized personnel in anesthesia, surgery, and nursing. The present investigation explores lessons learned in efficiency, teamwork, and data evaluation at a level 1 academic teaching facility. METHODS The months of July 2012, July 2013, and July 2014 were selected for this study. Multiple strategies were implemented through the Operating Room Committee during this time in an effort to reduce the number of OR delays and cancellations. RESULTS Case cancellations decreased significantly over the three-year period, while delays remained relatively stable. In July 2012, 15.0% of cases were cancelled and 10.2% were delayed. Cancellations decreased to 6.3% in 2013 and to 5.9% in 2014. The total number of cases completed per month increased each year throughout the study, from 577 in 2012 to 649 in 2013 to 842 in 2014. CONCLUSION These results are remarkable in comparison to the greater-than 20% cancellation rate recorded in 2005 when the current OR leadership team first assessed OR efficiency. An increase in the number of cases completed per month likely can be attributed to a reduction in the number of case cancellations. Increased efficiency allows for more operations to be performed, leading to increased profitability and an increased ability of hospitals to continue caring for patients. We advocate the implementation of a comprehensive multidisciplinary strategy for sustained improvement in OR efficiency and utilization.
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Abstract
Globally, food-producing animals consume 70 to 90% of genetically engineered (GE) crop biomass. This review briefly summarizes the scientific literature on performance and health of animals consuming feed containing GE ingredients and composition of products derived from them. It also discusses the field experience of feeding GE feed sources to commercial livestock populations and summarizes the suppliers of GE and non-GE animal feed in global trade. Numerous experimental studies have consistently revealed that the performance and health of GE-fed animals are comparable with those fed isogenic non-GE crop lines. United States animal agriculture produces over 9 billion food-producing animals annually, and more than 95% of these animals consume feed containing GE ingredients. Data on livestock productivity and health were collated from publicly available sources from 1983, before the introduction of GE crops in 1996, and subsequently through 2011, a period with high levels of predominately GE animal feed. These field data sets, representing over 100 billion animals following the introduction of GE crops, did not reveal unfavorable or perturbed trends in livestock health and productivity. No study has revealed any differences in the nutritional profile of animal products derived from GE-fed animals. Because DNA and protein are normal components of the diet that are digested, there are no detectable or reliably quantifiable traces of GE components in milk, meat, and eggs following consumption of GE feed. Globally, countries that are cultivating GE corn and soy are the major livestock feed exporters. Asynchronous regulatory approvals (i.e., cultivation approvals of GE varieties in exporting countries occurring before food and feed approvals in importing countries) have resulted in trade disruptions. This is likely to be increasingly problematic in the future as there are a large number of "second generation" GE crops with altered output traits for improved livestock feed in the developmental and regulatory pipelines. Additionally, advanced techniques to affect targeted genome modifications are emerging, and it is not clear whether these will be encompassed by the current GE process-based trigger for regulatory oversight. There is a pressing need for international harmonization of both regulatory frameworks for GE crops and governance of advanced breeding techniques to prevent widespread disruptions in international trade of livestock feedstuffs in the future.
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Affiliation(s)
| | - A E Young
- Department of Animal Science, University of California, Davis 95616
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27
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Abstract
Genomic selection (GS) is the use of statistical methods to estimate the genetic merit of a genotyped animal based on prediction equations derived from large ancestral populations with both phenotypes and genotypes. It has revolutionized the dairy cattle breeding industry and has been implemented with varying degrees of success in other animal breeding programs, including swine, poultry, and beef cattle. The findings of empirical field studies applying GS to the breeding sectors of these main animal protein industries are reviewed. Several translational considerations must be addressed before implementing GS in genetic improvement programs. These include determining and obtaining economically relevant phenotypes and determining the optimal size of the training population, cost-effective genotyping strategies, the practicality of field implementation, and the relative costs versus the benefits of the realized rate of genetic gain. GS may additionally change the optimal breeding scheme design, and studies that address this consideration are also reviewed briefly.
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28
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Momeni M, Cantu J, Young AE. Placental abruption and fetal demise secondary to placental metastases from unknown primary: a case report. J Reprod Med 2013; 58:341-343. [PMID: 23947085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Although maternal malignancy is relatively common, maternal metastases to the products of conception remains a rare event. There is no available literature that describes the incidence of placental metastases as a cause of abruption and fetal death. importanc CASE We present an unusual case of placental abruption and disseminated intravascular coagulation leading to fetal demise secondary to placental metastases of unknown origin. CONCLUSION In our case placental abruption likely resulted from metastases to the intervillous space.
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Affiliation(s)
- Mazdak Momeni
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA.
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Lin FYC, Weisman LE, Azimi P, Young AE, Chang K, Cielo M, Moyer P, Troendle JF, Schneerson R, Robbins JB. Assessment of intrapartum antibiotic prophylaxis for the prevention of early-onset group B Streptococcal disease. Pediatr Infect Dis J 2011; 30:759-63. [PMID: 21540758 PMCID: PMC3158245 DOI: 10.1097/inf.0b013e31821dc76f] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Most early-onset group B streptococcal (GBS) disease in recent years has occurred in newborns of prenatally GBS-negative mothers who missed intrapartum antibiotic prophylaxis (IAP). We aimed to assess the accuracy of prenatal culture in predicting GBS carriage during labor, the IAP use, and occurrence of early-onset GBS disease. METHODS We obtained vaginal-rectal swabs at labor for GBS culture from 5497 women of ≥ 32 weeks' gestation and surface cultures at birth from newborns between February 5, 2008 and February 4, 2009 at 3 hospitals in Houston, TX and Oakland, CA. Prenatal cultures were performed by a healthcare provider during routine care, and culture results were obtained from medical records. The accuracy of prenatal culture in predicting intrapartum GBS carriage was assessed by positive and negative predictive values. Mother-to-newborn transmission of GBS was assessed. Newborns were monitored for early-onset GBS disease. RESULTS GBS carriage was 24.5% by prenatal and 18.8% by labor cultures. Comparing prenatal with labor GBS cultures of 4696 women, the positive predictive value was 50.5% and negative predictive value was 91.7%. IAP, administered to 93.3% of prenatally GBS-positive women, was 83.7% effective in preventing newborn's GBS colonization. Mother-to-newborn transmission of GBS occurred in 2.6% of elective cesarean deliveries. Two newborns developed early-onset GBS disease (0.36/1000 births); the prenatal GBS culture of one was negative, the other's was unknown. CONCLUSIONS IAP was effective in interrupting mother-to-newborn transmission of GBS. However, approximately 10% of prenatally GBS-negative women were positive during labor and missed IAP, whereas approximately 50% of prenatally GBS-positive women were negative during labor and received IAP. These findings emphasize the need for rapid diagnostics during labor.
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Affiliation(s)
- Feng-Ying C Lin
- Division of Intramural Research and Division of Epidemiology, Statistic, and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
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Dietrich JE, De Silva NK, Young AE. Reliability study for pediatric and adolescent gynecology case-based learning in resident education. J Pediatr Adolesc Gynecol 2010; 23:102-6. [PMID: 19896402 DOI: 10.1016/j.jpag.2009.09.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2009] [Revised: 08/26/2009] [Accepted: 09/01/2009] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To assess web-based teaching as a tool for resident education in pediatric and adolescent gynecology. STUDY DESIGN Prospective Cohort involving 12 third year OB/GYN residents in a large university-based program. A second look reliability study on a previously utilized, web-based teaching case series in Pediatric and Adolescent Gynecology topics was evaluated. Residents' knowledge regarding the subject matter was assessed by pretest. After completion of the web-based teaching tool, a post test was administered. Residents were also given an opportunity to provide feedback regarding improvements to address future case series development for the tool and resident satisfaction in using this resource for resident education. RESULTS The pre-test group mean score was 11.2 (58.9%), SD=1.9. The post-test group mean score was 15.2 (80%), SD=1.70. (P=0.0002). Resident participants universally reported the case series was a useful teaching tool. Pooled results from 2005-2006 and 2007-2008 also yielded statistically significant scores from pre test to post test (power of >80% at the 95% confidence interval). CONCLUSION A computer-based learning tool is an effective resource to improve baseline knowledge among ob-gyn residents in the subspecialty field of Pediatric and Adolescent Gynecology.
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Affiliation(s)
- Jennifer E Dietrich
- Pediatric and Adolescent Gynecology, Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas 77030, USA.
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De Silva NK, Dietrich JE, Young AE. Pediatric and adolescent gynecology learned via a Web-based computerized case series. J Pediatr Adolesc Gynecol 2010; 23:111-5. [PMID: 19944631 DOI: 10.1016/j.jpag.2009.09.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Accepted: 09/14/2009] [Indexed: 10/20/2022]
Abstract
STUDY OBJECTIVE To increase resident knowledge in pediatric and adolescent gynecology via a Web-based self-tutorial. STUDY DESIGN Prospective cohort involving 11 third- and fourth-year residents in a large university program. Residents were asked to complete a Web-based teaching series of cases involving common topics of pediatric and adolescent gynecology (PAG). A pretest and a posttest were completed to assess knowledge gained. Residents were asked to give feedback regarding improvements to the Web-based series for future case development. SETTING University-affiliated residency program in a major metropolitan area. PARTICIPANTS Resident physicians in the Department of Obstetrics and Gynecology. INTERVENTIONS Introduction of a Web-based teaching series to enhance resident education. MAIN OUTCOME MEASURES Improvement of resident knowledge in PAG. RESULTS All residents improved their knowledge in PAG after reviewing the series of cases. The pretest group mean score was 50%. The posttest group score was 69% (P < .05). All (100%) of participants said that this tool was an effective way to improve resident knowledge in PAG. CONCLUSION A computer-based self-tutorial in pediatric and adolescent gynecology is a feasible and satisfactory teaching adjunct to PAG.
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Affiliation(s)
- Nirupama K De Silva
- Division of Pediatric and Adolescent Gynecology, Department of Obstetrics and Gynecology, University of Oklahoma-Tulsa, Tulsa, OK 74135-2512, USA.
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Séguin B, Zwerdling T, McCallan JL, DeCock HEV, Dewe LL, Naydan DK, Young AE, Bannasch DL, Foreman O, Kent MS. Development of a new canine osteosarcoma cell line. Vet Comp Oncol 2009; 4:232-40. [PMID: 19754807 DOI: 10.1111/j.1476-5829.2006.00112.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Establishing a canine osteosarcoma (OSA) cell line can be useful to develop in vivo and in vitro models of OSA. The goal of this study was to develop, characterize and authenticate a new canine OSA cell line and a clone. A cell line and a clone were developed with standard cell culture techniques from a naturally occurring OSA in a dog. The clonal cell line induced a tumour after injection in RAG 1-deficient mouse. Histology was consistent with OSA. The original tumour from the dog and the tumour induced in the mouse were both reactive with vimentin and osteonectin (ON). The parent cell line and clonal cell line were reactive with ON, osteocalcin and alkaline phosphatase. Loss of heterozygosity was found in the same three microsatellite markers in the parent and clonal cell lines, and the tumour tissue grown in the mouse.
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Affiliation(s)
- B Séguin
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA, USA.
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Smith LB, Bannasch DL, Young AE, Grossman DI, Belanger JM, Oberbauer AM. Canine fibroblast growth factor receptor 3 sequence is conserved across dogs of divergent skeletal size. BMC Genet 2008; 9:67. [PMID: 18940000 PMCID: PMC2576350 DOI: 10.1186/1471-2156-9-67] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2008] [Accepted: 10/21/2008] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Fibroblast growth factor receptor 3 (FGFR3) is expressed in the growth plate of endochondral bones and serves as a negative regulator of linear bone elongation. Activating mutations severely limit bone growth, resulting in dwarfism, while inactivating mutations significantly enhance bone elongation and overall skeletal size. Domesticated dogs exhibit the greatest skeletal size diversity of any species and, given the regulatory role of FGFR3 on growth plate proliferation, we asked whether sequence differences in FGFR3 could account for some of the size differences. METHODS All exons, the promoter region, and 60 bp of the 3' flanking region of the canine FGFR3 gene were sequenced for nine different dog breeds representing a spectrum of skeletal size. The resultant sequences were compared to the reference Boxer genome sequence. RESULTS There was no variation in sequence for any FGFR3 exons, promoter region, or 3' flanking sequence across all breeds evaluated. CONCLUSION The results suggest that, regardless of domestication selection pressure to develop breeds having extreme differences in skeletal size, the FGFR3 gene is conserved. This implies a critical role for this gene in normal skeletal integrity and indicates that other genes account for size variability in dogs.
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Affiliation(s)
- Logan B Smith
- Department of Animal Science, University of California, Davis, CA, USA
| | - Danika L Bannasch
- Department of Population Health and Reproduction, School of Veterinary Medicine University of California, Davis, CA, USA
| | - Amy E Young
- Department of Population Health and Reproduction, School of Veterinary Medicine University of California, Davis, CA, USA
| | | | | | - Anita M Oberbauer
- Department of Animal Science, University of California, Davis, CA, USA
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Abstract
Defects in angiogenesis occurring in utero produce a broad spectrum of clinical abnormalities. Some regress in infancy, some persist and may be allied with abnormalities of other structures. The possible interrelationships between abnormalities of the arterial, venous and lymphatic systems and skeletal development are explored in this paper.
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Abstract
Canine chondrodysplasia is a heritable defect of endochondral ossification characterized by disproportionately short limbs. It is directly linked to significant health concerns, such as intervertebral disc disease. Some human skeletal dysplasias exhibit similar disproportionate dwarfisms and are associated with mutations in the RMRP and SHOX genes. These phenotypic similarities indicated RMRP and SHOX as candidate genes in dogs. They were sequenced in three chondrodysplastic and three normal-legged breeds. Single nucleotide polymorphisms in the promoter regions of both genes and in exon 2 of SHOX were found in affected and unaffected breeds, indicating that they are not associated with canine chondrodysplasia.
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Affiliation(s)
- Amy E Young
- Department of Population Health and Reproduction, University of California, Davis, School of Veterinary Medicine, Davis, California 95616, USA
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Young AE, Timmins A, Olson G, Jennings J, Toy E, Dola C, Pridjian G. A multi-institutional effort for temporary training of residents displaced by disaster: lessons from Katrina. Am J Obstet Gynecol 2007; 197:534.e1-7. [PMID: 17980199 DOI: 10.1016/j.ajog.2007.07.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Revised: 06/28/2007] [Accepted: 07/23/2007] [Indexed: 11/30/2022]
Abstract
OBJECTIVE This study was undertaken to describe a comprehensive, collaborative temporary residency training curriculum after disaster. STUDY DESIGN The Texas Southeast Alliance was created in response to the Katrina Disaster by regional obstetric/gynecology programs. Principles were devised to guide development of a temporary training curriculum. Learning opportunities were identified and pooled. Affected program directors were contacted who expressed interest in the curriculum which had been approved by institutional officials and appropriate regulatory bodies. RESULTS In total, 41 different training opportunities were made available to the Tulane residents. Twenty-four residents completed 92 rotations in total. Residents met weekly with their program director. Free psychiatric consultative services were provided through resident counseling services. Housing was facilitated wherever possible. CONCLUSION Consolidation of resources by the Texas Southeast Alliance provided temporary training experiences for Tulane obstetric and gynecology residents displaced by Hurricane Katrina. Effective training can be maintained after disaster by coordinating institutional efforts and establishing governing principles.
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Affiliation(s)
- Amy E Young
- Baylor College of Medicine, Houston, TX, USA
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Young AE, Bower LP, Affolter VK, De Cock HEV, Ferraro GL, Bannasch DL. Evaluation of FOXC2 as a candidate gene for chronic progressive lymphedema in draft horses. Vet J 2007; 174:397-9. [PMID: 16884936 DOI: 10.1016/j.tvjl.2006.05.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2006] [Revised: 05/12/2006] [Accepted: 05/27/2006] [Indexed: 11/30/2022]
Abstract
Chronic progressive lymphedema (CPL) is a debilitating condition identified in Clydesdales, Shires and Belgian draft horses and results in progressive swelling of the lower legs associated with the development of thick skin folds, ulcerations, fibrosis and marked hyperkeratosis. The result is severe discomfort and recurrent secondary infection, often requiring euthanasia. Due to the delayed onset, many horses are bred prior to diagnosis. CPL has only been documented in three related draft horse breeds, suggesting a genetic cause. Determining the molecular basis would enable owners to test horses prior to breeding and facilitate the elimination of CPL. Mutations in the FOXC2 gene cause a comparable condition in humans, lymphedema-distichiasis. This gene was sequenced in affected and unaffected draft horses and a control horse. Four single nucleotide polymorphisms (SNPs) were identified in unaffected draft horses and the control horse, indicating that they were not associated with CPL. A fifth SNP was seen in a single affected draft horse and the control horse. Since it was not seen in all affected draft horses, this SNP is not associated with the CPL phenotype.
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Affiliation(s)
- Amy E Young
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
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Young AE, Fine PM, McCrery R, Wren PA, Richter HE, Brubaker L, Brown MB, Weber AM. Spanish language translation of pelvic floor disorders instruments. Int Urogynecol J 2007; 18:1171-8. [PMID: 17576498 DOI: 10.1007/s00192-006-0297-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2006] [Accepted: 12/19/2006] [Indexed: 10/23/2022]
Abstract
The purpose of the study is to translate existing measures of pelvic symptoms and quality of life from English into Spanish, facilitating research participation of Hispanic/Latina women. The forward-backward translation protocol was applied then adjudicated by a concordance committee. The measures included the Pelvic Floor Distress Inventory (PFDI), Pelvic Floor Impact Questionnaire (PFIQ), Medical, Epidemiological, and Social Aspects of Aging (MESA) Questionnaire, Hunskaar Severity Measure, Fecal Incontinence Severity Index and modified Manchester Questionnaire, Pelvic Organ Prolapse/Urinary Incontinence Sexual Functioning Questionnaire (PISQ), and the Life Orientation Test (LOT). English and Spanish versions were administered to 50 Hispanic/Latina women with pelvic symptoms. Kappa correlations of items and correlation coefficients for scales were computed. Psychometric testing for translations demonstrated good (0.80-0.89), very good (0.90-0.95), or excellent (>0.95) correlations for primary scales of the PFDI, PFIQ, MESA, Hunskaar, PISQ, and LOT. Strict translation techniques and testing yielded valid Spanish translations of instruments assessing pelvic symptoms/functional life impact in women with pelvic floor disorders.
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Affiliation(s)
- Amy E Young
- Department of Obstetrics and Gynecology, Baylor College of Medicine, 1706 Dryden, Suite 1100, Houston, TX 77030, USA.
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Young AE, Brady JR, Patino M. The case of the vanishing tumor. Am J Obstet Gynecol 2007; 196:417.e1-2. [PMID: 17403442 DOI: 10.1016/j.ajog.2006.10.859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2006] [Revised: 08/17/2006] [Accepted: 10/04/2006] [Indexed: 11/25/2022]
Affiliation(s)
- Amy E Young
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
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Rincón G, Young AE, Bannasch DL, Medrano JF. Characterization of variation in the canine suppressor of cytokine signaling-2 (SOCS2) gene. Genet Mol Res 2007; 6:144-51. [PMID: 17469064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Suppressor of cytokine signaling 2 (SOCS2) is a negative regulator of growth hormone signaling. The deletion of SOCS2 in mice results in a 30-50% increase in post-natal growth. In an effort to identify polymorphisms in the SOCS2 gene that may be associated with body size in dogs, we characterized the canine SOCS2 gene and analyzed its genetic diversity among small and large dog breeds. The study was carried out on a total of 520 dogs from 66 different breeds. Dogs were classified as large or small based on height and weight as determined by their respective American Kennel Club breed standards. The SH2 and SOCS domains of the canine SOCS2 gene were sequenced in 32 dogs from different breeds. Only one non-synonymous sequence variant (DQ415457:g.326G>T) was detected which corresponds to an amino acid change (Asp127Tyr). All samples were genotyped by PCR/RFLP and the allele frequencies were determined for each dog breed. The T allele was distributed primarily among European large dog breeds with a gene frequency ranging from 0.72 to 0.04. The nature of the nucleotide change and the effect on the protein together with the finding of a QTL related to body size in the same CFA15 region by other researchers suggest canine SOCS2 as a potential candidate gene for body size in dogs. Future studies will be needed to clarify the role of the 326G>T polymorphism and its interaction with genes like growth hormone and insulin-like growth factor 1.
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Affiliation(s)
- G Rincón
- Department of Animal Science, University of California, Davis, CA, USA
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Young AE. An emerging diagnosis. Am J Obstet Gynecol 2007; 196:282.e1-2. [PMID: 17346556 DOI: 10.1016/j.ajog.2006.10.860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2006] [Revised: 08/15/2006] [Accepted: 10/04/2006] [Indexed: 10/23/2022]
Affiliation(s)
- Amy E Young
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
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Young AE, Ryun JR, Bannasch DL. Deletions in the COL10A1 gene are not associated with skeletal changes in dogs. Mamm Genome 2006; 17:761-8. [PMID: 16845471 DOI: 10.1007/s00335-005-0163-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2005] [Accepted: 03/02/2006] [Indexed: 12/31/2022]
Abstract
Type 10 collagen alpha 1 (COL10A1) is a short-chain collagen of cartilage synthesized by chondrocytes during the growth of long bones. COL10A1 mutations, which frequently result in COL10A1 haploinsufficiency, have been identified in patients with Schmid metaphyseal chondrodysplasia (SMCD), a cartilage disorder characterized by short-limbed short stature and bowed legs. Similarities between SMCD and short stature in various dog breeds suggested COL10A1 as a candidate for canine skeletal dysplasia. We report the sequencing of the exons and promoter region of the COL10A1 gene in dog breeds fixed for a specific type of skeletal dysplasia known as chondrodysplasia, breeds that segregate the skeletal dysplasia phenotype, and control dogs of normal stature. Thirteen single nucleotide polymorphisms (SNPs), one insertion, and two deletions, one of which introduces a premature stop codon and likely results in nonsense-mediated decay and the degradation of the mutant allele product, were identified in the coding region. There appear to be no causal relationships between the polymorphisms identified in this study and short stature in dogs. Although COL10A1 haploinsufficiency is an important cause of SMCD in humans, it does not seem to be responsible for the skeletal dysplasia phenotype in these dog breeds. In addition, homozygosity for the nonsense allele does not result in the observed canine skeletal dysplasia phenotype.
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Affiliation(s)
- Amy E Young
- Department of Population Health and Reproduction, University of California-Davis, School of Veterinary Medicine, 1114 Tupper Hall, 1 Shields Avenue, 95616, USA.
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Young AE. Medicolegal reporting in surgery. B. J. Jones (ed.). 240 × 160mm. Pp. 314, Illustrated. 1996. Edinburgh: Churchill Livingstone. £55. Br J Surg 2005. [DOI: 10.1002/bjs.1800840857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- A E Young
- St Thomas' Hospital, London SE1 7EH, UK
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Young AE. The man behind the syndrome. P. Beighton and G. Beighton. 275 × 195 mm. Pp. 240. Illustrated. 1986. London: Springer Verlag. £19.90. Br J Surg 2005. [DOI: 10.1002/bjs.1800740143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Affiliation(s)
- A E Young
- St. Thomas' Hospital, London SEI 7EH, UK
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Young AE. Private medical practice. C. Locke. 233 × 150 mm. Pp 200. Illustrated. 1994. Abingdon: Radcliffe Medical Press Ltd. £14.95. Br J Surg 2005. [DOI: 10.1002/bjs.1800820458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- A E Young
- Department of Surgery, St Thomas' Hospital, London SE1 7EH, UK
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Young AE. Textbook of surgery 1. D. C. Sabiston Jr. 270 × 205 mm Pp. 2496. 1986. Philadelphia: W. B. Saunders. £65.00. Br J Surg 2005. [DOI: 10.1002/bjs.1800740132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Young AE, Burnand KG. Higher degrees in surgical training: A premeeting workshop at the SRS. Br J Surg 2005. [DOI: 10.1002/bjs.1800720345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Young AE. Endocrine surgery of the thyroid and parathyroid glands. O. H. Clark. 270 × 190 mm. pp. 378 + xi. Illustrated in black and white and colour. 1985. St. Louis, Minnesota: C. V. Mosby Co. £62.00. Br J Surg 2005. [DOI: 10.1002/bjs.1800731151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
OBJECTIVE To estimate whether benzocaine spray applied to the cervix and the endocervical canal before performing office endometrial biopsy improves patient comfort during the procedure. METHODS Eighty-eight women were randomly assigned to receive either 20% benzocaine spray or placebo to the outside of the cervix and into the endocervical canal before an endometrial biopsy was performed. The main outcome measure was pain during the endometrial biopsy, assessed by a visual analog scale. Statistical analysis was performed using Wilcoxon rank-sum test and Student t test. RESULTS There were no statistically significant differences between the study group and the control group in mean age, race, parity, body mass index, menopausal status, tenaculum use, or history of chronic pelvic pain. No statistically significant differences were found in median pain scores between the 2 treatment groups. CONCLUSION Topical benzocaine spray does not appear to offer effective pain control in patients undergoing an endometrial biopsy. LEVEL OF EVIDENCE I.
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Affiliation(s)
- Jon I Einarsson
- Department of Obstetrics and Gynecology, Landspitali-University Hospital, Reykjavik, Iceland.
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