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Fleece H, Wagner NJ, Chronis-Tuscano A, Smith KA, Novick DR, Druskin LR, Shakiba N, Danko CM, Rubin KH. Can behaviorally inhibited preschoolers make friends? Dev Psychol 2024:2024-76631-001. [PMID: 38647467 DOI: 10.1037/dev0001742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Preschoolers who display extremely inhibited behavior are at risk for the development of anxiety disorders. However, behavioral inhibition (BI) is a multifaceted characteristic. Some children with BI are fearful when confronted by unfamiliar adults, peers, and objects; others are fearful when separated from their parents. In the present study, we examined specific features of BI that predicted observed friendship formation among preschoolers who are behaviorally inhibited. We also examined whether teacher ratings of classroom behaviors predicted friendship formation. Sixty highly inhibited children (35 female, Mage = 52.57 months) were observed during eight weekly free-play sessions with initially unfamiliar inhibited peers. Free-play periods occurred before weekly intervention sessions for children with BI and their parents. An observational protocol was developed to identify children who made a friend during the eight weekly sessions. Before the first session, different subtypes of BI were assessed by parents; preschool teachers assessed the children's classroom behaviors with familiar peers. Twenty-six children met the criteria for having made and kept a friend. Probit regression analyses revealed that parent ratings of BI among unfamiliar peers and teacher ratings of children's social anxiety before the intervention were associated with a decreased probability of making a friend. No evidence was found linking children's responses to the intervention and friendship formation. Results suggest that extremelyinhibited preschoolers are capable of making friends. Implications for future research and intervention efforts that focus on individual differences of children with BI are discussed. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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Affiliation(s)
- Hailey Fleece
- Department of Human Development and Quantitative Methodology, University of Maryland
| | | | | | - Kelly A Smith
- Department of Human Development and Quantitative Methodology, University of Maryland
| | | | | | - Nila Shakiba
- Department of Psychological and Brain Sciences, Boston University
| | | | - Kenneth H Rubin
- Department of Human Development and Quantitative Methodology, University of Maryland
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Friedman CE, Cheetham SW, Negi S, Mills RJ, Ogawa M, Redd MA, Chiu HS, Shen S, Sun Y, Mizikovsky D, Bouveret R, Chen X, Voges HK, Paterson S, De Angelis JE, Andersen SB, Cao Y, Wu Y, Jafrani YMA, Yoon S, Faulkner GJ, Smith KA, Porrello E, Harvey RP, Hogan BM, Nguyen Q, Zeng J, Kikuchi K, Hudson JE, Palpant NJ. HOPX-associated molecular programs control cardiomyocyte cell states underpinning cardiac structure and function. Dev Cell 2024; 59:91-107.e6. [PMID: 38091997 DOI: 10.1016/j.devcel.2023.11.012] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 05/09/2023] [Accepted: 11/13/2023] [Indexed: 01/11/2024]
Abstract
Genomic regulation of cardiomyocyte differentiation is central to heart development and function. This study uses genetic loss-of-function human-induced pluripotent stem cell-derived cardiomyocytes to evaluate the genomic regulatory basis of the non-DNA-binding homeodomain protein HOPX. We show that HOPX interacts with and controls cardiac genes and enhancer networks associated with diverse aspects of heart development. Using perturbation studies in vitro, we define how upstream cell growth and proliferation control HOPX transcription to regulate cardiac gene programs. We then use cell, organoid, and zebrafish regeneration models to demonstrate that HOPX-regulated gene programs control cardiomyocyte function in development and disease. Collectively, this study mechanistically links cell signaling pathways as upstream regulators of HOPX transcription to control gene programs underpinning cardiomyocyte identity and function.
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Affiliation(s)
- Clayton E Friedman
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Seth W Cheetham
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Sumedha Negi
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Richard J Mills
- QIMR Berghofer Medical Research Institute, Brisbane, QLD 4006, Australia; School of Biomedical Sciences, The University of Queensland, St Lucia, QLD 4072, Australia; Novo Nordisk Foundation Center for Stem Cell Medicine, Murdoch Children's Research Institute, Melbourne, VIC 3052, Australia; Department of Paediatrics, The University of Melbourne, Melbourne, VIC 3052, Australia; School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD, Australia
| | - Masahito Ogawa
- Victor Chang Cardiac Research Institute, Sydney, NSW 2010, Australia; School of Clinical Medicine and School of Biotechnology and Biomolecular Science, UNSW Sydney, Kensington, Sydney, NSW 2052, Australia
| | - Meredith A Redd
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Han Sheng Chiu
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Sophie Shen
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Yuliangzi Sun
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Dalia Mizikovsky
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Romaric Bouveret
- Victor Chang Cardiac Research Institute, Sydney, NSW 2010, Australia; School of Clinical Medicine and School of Biotechnology and Biomolecular Science, UNSW Sydney, Kensington, Sydney, NSW 2052, Australia
| | - Xiaoli Chen
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Holly K Voges
- QIMR Berghofer Medical Research Institute, Brisbane, QLD 4006, Australia; School of Biomedical Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Scott Paterson
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Jessica E De Angelis
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Stacey B Andersen
- Genome Innovation Hub, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Yuanzhao Cao
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Yang Wu
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Yohaann M A Jafrani
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Sohye Yoon
- Genome Innovation Hub, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Geoffrey J Faulkner
- Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia; Mater Research Institute, University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Kelly A Smith
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Enzo Porrello
- Novo Nordisk Foundation Center for Stem Cell Medicine, Murdoch Children's Research Institute, Melbourne, VIC 3052, Australia; Melbourne Centre for Cardiovascular Genomics and Regenerative Medicine, The Royal Children's Hospital, Melbourne, VIC 3052, Australia; Department of Anatomy and Physiology, School of Biomedical Sciences, The University of Melbourne, Melbourne, VIC 3010, Australia; Department of Paediatrics, The University of Melbourne, Melbourne, VIC 3052, Australia
| | - Richard P Harvey
- Victor Chang Cardiac Research Institute, Sydney, NSW 2010, Australia; School of Clinical Medicine and School of Biotechnology and Biomolecular Science, UNSW Sydney, Kensington, Sydney, NSW 2052, Australia
| | - Benjamin M Hogan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Quan Nguyen
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Jian Zeng
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Kazu Kikuchi
- Victor Chang Cardiac Research Institute, Sydney, NSW 2010, Australia; School of Clinical Medicine and School of Biotechnology and Biomolecular Science, UNSW Sydney, Kensington, Sydney, NSW 2052, Australia
| | - James E Hudson
- QIMR Berghofer Medical Research Institute, Brisbane, QLD 4006, Australia; School of Biomedical Sciences, The University of Queensland, St Lucia, QLD 4072, Australia; School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD, Australia
| | - Nathan J Palpant
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia.
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Novick DR, Meyer CT, Wagner NJ, Rubin KH, Danko CM, Dougherty LR, Druskin LR, Smith KA, Chronis-Tuscano A. Testing reciprocal associations between child anxiety and parenting across early interventions for inhibited preschoolers. J Child Psychol Psychiatry 2023; 64:1665-1678. [PMID: 37644651 DOI: 10.1111/jcpp.13879] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/28/2023] [Indexed: 08/31/2023]
Abstract
BACKGROUND Given the robust evidence base for the efficacy of evidence-based treatments targeting youth anxiety, researchers have advanced beyond efficacy outcome analysis to identify mechanisms of change and treatment directionality. Grounded in developmental transactional models, interventions for young children at risk for anxiety by virtue of behaviorally inhibited temperament often target parenting and child factors implicated in the early emergence and maintenance of anxiety. In particular, overcontrolling parenting moderates risk for anxiety among highly inhibited children, just as child inhibition has been shown to elicit overcontrolling parenting. Although longitudinal research has elucidated the temporal unfolding of factors that interact to place inhibited children at risk for anxiety, reciprocal transactions between these child and parent factors in the context of early interventions remain unknown. METHOD This study addresses these gaps by examining mechanisms of change and treatment directionality (i.e., parent-to-child vs. child-to-parent influences) within a randomized controlled trial comparing two interventions for inhibited preschoolers (N = 151): the multicomponent Turtle Program ('Turtle') and the parent-only Cool Little Kids program ('CLK'). Reciprocal relations between parent-reported child anxiety, observed parenting, and parent-reported accommodation of child anxiety were examined across four timepoints: pre-, mid-, and post-treatment, and one-year follow-up (NCT02308826). RESULTS Hypotheses were tested via latent curve models with structured residuals (LCM-SR) and latent change score (LCS) models. LCM-SR results were consistent with the child-to-parent influences found in previous research on cognitive behavioral therapy (CBT) for older anxious youth, but only emerged in Turtle. LCS analyses revealed bidirectional effects of changes in parent accommodation and child anxiety during and after intervention, but only in Turtle. CONCLUSION Our findings coincide with developmental transactional models, suggesting that the development of child anxiety may result from child-to-parent influences rather than the reverse, and highlight the importance of targeting parent and child factors simultaneously in early interventions for young, inhibited children.
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Affiliation(s)
- Danielle R Novick
- Department of Psychology, University of Maryland, College Park, College Park, MD, USA
- Yale School of Medicine, Yale Child Study Center, New Haven, CT, USA
| | - Christian T Meyer
- Department of Human Development & Quantitative Methodology, University of Maryland, College Park, College Park, MD, USA
| | - Nicholas J Wagner
- Department of Psychological & Brain Sciences, Boston University, Boston, MA, USA
| | - Kenneth H Rubin
- Department of Human Development & Quantitative Methodology, University of Maryland, College Park, College Park, MD, USA
| | - Christina M Danko
- Department of Psychology, University of Maryland, College Park, College Park, MD, USA
| | - Lea R Dougherty
- Department of Psychology, University of Maryland, College Park, College Park, MD, USA
| | - Lindsay R Druskin
- Department of Psychology, West Virginia University, Morgantown, WV, USA
| | - Kelly A Smith
- Department of Human Development & Quantitative Methodology, University of Maryland, College Park, College Park, MD, USA
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Huttner IG, Santiago CF, Jacoby A, Cheng D, Trivedi G, Cull S, Cvetkovska J, Chand R, Berger J, Currie PD, Smith KA, Fatkin D. Loss of Sec-1 Family Domain-Containing 1 ( scfd1) Causes Severe Cardiac Defects and Endoplasmic Reticulum Stress in Zebrafish. J Cardiovasc Dev Dis 2023; 10:408. [PMID: 37887855 PMCID: PMC10607167 DOI: 10.3390/jcdd10100408] [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: 03/28/2023] [Revised: 09/15/2023] [Accepted: 09/20/2023] [Indexed: 10/28/2023] Open
Abstract
Dilated cardiomyopathy (DCM) is a common heart muscle disorder that frequently leads to heart failure, arrhythmias, and death. While DCM is often heritable, disease-causing mutations are identified in only ~30% of cases. In a forward genetic mutagenesis screen, we identified a novel zebrafish mutant, heart and head (hahvcc43), characterized by early-onset cardiomyopathy and craniofacial defects. Linkage analysis and next-generation sequencing identified a nonsense variant in the highly conserved scfd1 gene, also known as sly1, that encodes sec1 family domain-containing 1. Sec1/Munc18 proteins, such as Scfd1, are involved in membrane fusion regulating endoplasmic reticulum (ER)/Golgi transport. CRISPR/Cas9-engineered scfd1vcc44 null mutants showed severe cardiac and craniofacial defects and embryonic lethality that recapitulated the phenotype of hahvcc43 mutants. Electron micrographs of scfd1-depleted cardiomyocytes showed reduced myofibril width and sarcomere density, as well as reticular network disorganization and fragmentation of Golgi stacks. Furthermore, quantitative PCR analysis showed upregulation of ER stress response and apoptosis markers. Both heterozygous hahvcc43 mutants and scfd1vcc44 mutants survived to adulthood, showing chamber dilation and reduced ventricular contraction. Collectively, our data implicate scfd1 loss-of-function as the genetic defect at the hahvcc43 locus and provide new insights into the role of scfd1 in cardiac development and function.
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Affiliation(s)
- Inken G. Huttner
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Celine F. Santiago
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Arie Jacoby
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
| | - Delfine Cheng
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Gunjan Trivedi
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
| | - Stephen Cull
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
| | - Jasmina Cvetkovska
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
| | - Renee Chand
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
| | - Joachim Berger
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia; (J.B.); (P.D.C.)
- European Molecular Biology Labs (EMBL) Australia, Victorian Node, Monash University, Clayton, VIC 3800, Australia
| | - Peter D. Currie
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia; (J.B.); (P.D.C.)
- European Molecular Biology Labs (EMBL) Australia, Victorian Node, Monash University, Clayton, VIC 3800, Australia
| | - Kelly A. Smith
- Department of Anatomy & Physiology, The University of Melbourne, Parkville, VIC 3010, Australia;
| | - Diane Fatkin
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; (I.G.H.); (C.F.S.); (A.J.); (D.C.); (G.T.); (S.C.); (J.C.); (R.C.)
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, NSW 2052, Australia
- Cardiology Department, St Vincent’s Hospital, Darlinghurst, NSW 2010, Australia
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5
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Druskin LR, Novick DR, Smith KA, Chronis-Tuscano A, Wagner NJ, Pham S, Fleece HM, Danko CM, Rubin KH. Comparison of behaviorally inhibited and typically developing children's play behaviors in the preschool classroom. Front Psychol 2023; 14:1193915. [PMID: 37502750 PMCID: PMC10369178 DOI: 10.3389/fpsyg.2023.1193915] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 06/22/2023] [Indexed: 07/29/2023] Open
Abstract
Introduction Behavioral inhibition (BI) is a temperamental trait characterized by a bias to respond with patterns of fearful or anxious behavior when faced with unfamiliar situations, objects, or people. It has been suggested that children who are inhibited may experience early peer difficulties. However, researchers have yet to systematically compare BI versus typically developing children's observed asocial and social behavior in familiar, naturalistic settings. Method We compared the in-school behaviors of 130 (M = 54 months, 52% female) highly inhibited preschoolers (identified using the parent-reported Behavioral Inhibition Questionnaire) to 145 (M = 53 months, 52% female) typically developing preschoolers. Both samples were observed on at least two different days for approximately 60 min. Observers used the Play Observation Scale to code children's behavior in 10-s blocks during free play. Teachers completed two measures of children's behavior in the classroom. Results Regression models with robust standard errors controlling for child sex, age, and weekly hours in school revealed that preschoolers identified as BI engaged in significantly more observed reticent and solitary behavior, and less social play and teacher interaction than the typically developing sample. Children with BI also initiated social interaction with their peers and teachers less often than their counterparts who were not inhibited. Teachers reported that children identified as BI were more asocial and less prosocial than their non-BI counterparts. Discussion Significantly, the findings indicated that inhibited children displayed more solitude in the context of familiar peers. Previous observational studies have indicated behavioral differences between BI and unfamiliar typical age-mates in novel laboratory settings. Children identified as BI did not receive fewer bids for social interaction than their typically developing peers, thereby suggesting that children who are inhibited have difficulty capitalizing on opportunities to engage in social interaction with familiar peers. These findings highlight the need for early intervention for children with BI to promote social engagement, given that the frequent expression of solitude in preschool has predicted such negative outcomes as peer rejection, negative self-regard, and anxiety during the elementary and middle school years.
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Affiliation(s)
- Lindsay R. Druskin
- Department of Psychology, West Virginia University, Morgantown, WV, United States
| | - Danielle R. Novick
- Department of Psychology, University of Maryland, College Park, MD, United States
- Yale Child Study Center, Yale School of Medicine, New Haven, CT, United States
| | - Kelly A. Smith
- Department of Human Department & Quantitative Methodology, University of Maryland, College Park, MD, United States
| | | | - Nicholas J. Wagner
- Department of Psychological & Brain Sciences, Boston University, Boston, MA, United States
| | - Stephanie Pham
- Department of Human Department & Quantitative Methodology, University of Maryland, College Park, MD, United States
| | - Hailey M. Fleece
- Department of Counseling, Higher Education, and Special Education, University of Maryland, College Park, MD, United States
| | - Christina M. Danko
- Department of Psychology, University of Maryland, College Park, MD, United States
| | - Kenneth H. Rubin
- Department of Human Department & Quantitative Methodology, University of Maryland, College Park, MD, United States
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6
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Smith KA, Dominado N, Briffa JF. Fins, fur, and wings: the study of Tmem161b across species, and what it tells us about its function in the heart. Mamm Genome 2023; 34:270-275. [PMID: 37222785 PMCID: PMC10290617 DOI: 10.1007/s00335-023-09994-z] [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: 10/26/2022] [Accepted: 04/19/2023] [Indexed: 05/25/2023]
Abstract
Transmembrane protein 161b (Tmem161b) was recently identified in multiple high-through-put phenotypic screens, including in fly, zebrafish, and mouse. In zebrafish, Tmem161b was identified as an essential regulator of cardiac rhythm. In mouse, Tmem161b shows conserved function in regulating cardiac rhythm but has also been shown to impact cardiac morphology. Homozygous or heterozygous missense mutations have also recently been reported for TMEM161B in patients with structural brain malformations, although its significance in the human heart remains to be determined. Across the three model organisms studied to date (fly, fish, and mouse), Tmem161b loss of function is implicated in intracellular calcium ion handling, which may explain the diverse phenotypes observed. This review summarises the current knowledge of this conserved and functionally essential protein in the context of cardiac biology.
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Affiliation(s)
- Kelly A Smith
- Department of Anatomy & Physiology, The University of Melbourne, Parkville, VIC, 3010, Australia.
| | - Nicole Dominado
- Department of Anatomy & Physiology, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Jessica F Briffa
- Department of Anatomy & Physiology, The University of Melbourne, Parkville, VIC, 3010, Australia
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7
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Grimm L, Mason E, Yu H, Dudczig S, Panara V, Chen T, Bower NI, Paterson S, Rondon Galeano M, Kobayashi S, Senabouth A, Lagendijk AK, Powell J, Smith KA, Okuda KS, Koltowska K, Hogan BM. Single-cell analysis of lymphatic endothelial cell fate specification and differentiation during zebrafish development. EMBO J 2023:e112590. [PMID: 36912146 DOI: 10.15252/embj.2022112590] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 09/13/2022] [Revised: 01/24/2023] [Accepted: 02/03/2023] [Indexed: 03/14/2023] Open
Abstract
During development, the lymphatic vasculature forms as a second network derived chiefly from blood vessels. The transdifferentiation of embryonic venous endothelial cells (VECs) into lymphatic endothelial cells (LECs) is a key step in this process. Specification, differentiation and maintenance of LEC fate are all driven by the transcription factor Prox1, yet the downstream mechanisms remain to be elucidated. We here present a single-cell transcriptomic atlas of lymphangiogenesis in zebrafish, revealing new markers and hallmarks of LEC differentiation over four developmental stages. We further profile single-cell transcriptomic and chromatin accessibility changes in zygotic prox1a mutants that are undergoing a LEC-VEC fate shift. Using maternal and zygotic prox1a/prox1b mutants, we determine the earliest transcriptomic changes directed by Prox1 during LEC specification. This work altogether reveals new downstream targets and regulatory regions of the genome controlled by Prox1 and presents evidence that Prox1 specifies LEC fate primarily by limiting blood vascular and haematopoietic fate. This extensive single-cell resource provides new mechanistic insights into the enigmatic role of Prox1 and the control of LEC differentiation in development.
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Affiliation(s)
- Lin Grimm
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia.,Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Elizabeth Mason
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Hujun Yu
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Stefanie Dudczig
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Virginia Panara
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Tyrone Chen
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Neil I Bower
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Scott Paterson
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia.,Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Maria Rondon Galeano
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Sakurako Kobayashi
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Anne Senabouth
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia.,Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Anne K Lagendijk
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Joseph Powell
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia.,Garvan Institute of Medical Research, Sydney, NSW, Australia.,School of Medical Sciences, University of New South Wales, Kensington, Sydney, NSW, Australia.,Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Kelly A Smith
- Department of Anatomy and Physiology, University of Melbourne, Melbourne, VIC, Australia
| | - Kazuhide S Okuda
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Katarzyna Koltowska
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Benjamin M Hogan
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia.,Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia.,Department of Anatomy and Physiology, University of Melbourne, Melbourne, VIC, Australia
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8
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Akula SK, Marciano JH, Lim Y, Exposito-Alonso D, Hylton NK, Hwang GH, Neil JE, Dominado N, Bunton-Stasyshyn RK, Song JHT, Talukdar M, Schmid A, Teboul L, Mo A, Shin T, Finander B, Beck SG, Yeh RC, Otani A, Qian X, DeGennaro EM, Alkuraya FS, Maddirevula S, Cascino GD, Giannini C, Burrage LC, Rosenfield JA, Ketkar S, Clark GD, Bacino C, Lewis RA, Segal RA, Bazan JF, Smith KA, Golden JA, Cho G, Walsh CA. TMEM161B regulates cerebral cortical gyration, Sonic Hedgehog signaling, and ciliary structure in the developing central nervous system. Proc Natl Acad Sci U S A 2023; 120:e2209964120. [PMID: 36669111 PMCID: PMC9942790 DOI: 10.1073/pnas.2209964120] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 12/14/2022] [Indexed: 01/22/2023] Open
Abstract
Sonic hedgehog signaling regulates processes of embryonic development across multiple tissues, yet factors regulating context-specific Shh signaling remain poorly understood. Exome sequencing of families with polymicrogyria (disordered cortical folding) revealed multiple individuals with biallelic deleterious variants in TMEM161B, which encodes a multi-pass transmembrane protein of unknown function. Tmem161b null mice demonstrated holoprosencephaly, craniofacial midline defects, eye defects, and spinal cord patterning changes consistent with impaired Shh signaling, but were without limb defects, suggesting a CNS-specific role of Tmem161b. Tmem161b depletion impaired the response to Smoothened activation in vitro and disrupted cortical histogenesis in vivo in both mouse and ferret models, including leading to abnormal gyration in the ferret model. Tmem161b localizes non-exclusively to the primary cilium, and scanning electron microscopy revealed shortened, dysmorphic, and ballooned ventricular zone cilia in the Tmem161b null mouse, suggesting that the Shh-related phenotypes may reflect ciliary dysfunction. Our data identify TMEM161B as a regulator of cerebral cortical gyration, as involved in primary ciliary structure, as a regulator of Shh signaling, and further implicate Shh signaling in human gyral development.
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Affiliation(s)
- Shyam K. Akula
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Harvard-Massachusetts Institute of Technology MD/PhD Program, Program in Neuroscience, Harvard Medical School, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Jack H. Marciano
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Youngshin Lim
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA90048
| | - David Exposito-Alonso
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Norma K. Hylton
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Harvard-Massachusetts Institute of Technology MD/PhD Program, Program in Neuroscience, Harvard Medical School, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Grace H. Hwang
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA02115
- Department of Neurobiology, Harvard Medical School, Boston, MA02115
| | - Jennifer E. Neil
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
| | - Nicole Dominado
- Department of Anatomy & Physiology, The University of Melbourne, Melbourne, VIC3010, Australia
| | | | - Janet H. T. Song
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Maya Talukdar
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Harvard-Massachusetts Institute of Technology MD/PhD Program, Program in Neuroscience, Harvard Medical School, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Aloisia Schmid
- Department of Physics/Electron Microscopy Core, Northeastern University, Boston, MA02115
| | - Lydia Teboul
- Mary Lyon Centre, United Kingdom Medical Research Council Harwell, Didcot, Oxfordshire,OX11 0RD, UK
| | - Alisa Mo
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
| | - Taehwan Shin
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Benjamin Finander
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Samantha G. Beck
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
| | - Rebecca C. Yeh
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
| | - Aoi Otani
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
| | - Xuyu Qian
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
| | - Ellen M. DeGennaro
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
| | - Fowzan S. Alkuraya
- Department of Translational Genomics, Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center, 11564 Riyadh, Saudi Arabia
| | - Sateesh Maddirevula
- Department of Translational Genomics, Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center, 11564 Riyadh, Saudi Arabia
| | | | - Caterina Giannini
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN55905
| | | | - Lindsay C. Burrage
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX77030
- Departments of Pediatrics, Baylor College of Medicine, Houston, TX77030
- Neurology, Baylor College of Medicine, Houston, TX77030
- Neuroscience, Baylor College of Medicine, Houston, TX77030
| | - Jill A. Rosenfield
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX77030
| | - Shamika Ketkar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX77030
| | - Gary D. Clark
- Departments of Pediatrics, Baylor College of Medicine, Houston, TX77030
- Neurology, Baylor College of Medicine, Houston, TX77030
- Neuroscience, Baylor College of Medicine, Houston, TX77030
| | - Carlos Bacino
- Departments of Pediatrics, Baylor College of Medicine, Houston, TX77030
- Neurology, Baylor College of Medicine, Houston, TX77030
- Neuroscience, Baylor College of Medicine, Houston, TX77030
| | - Richard A. Lewis
- Departments of Pediatrics, Baylor College of Medicine, Houston, TX77030
- Neurology, Baylor College of Medicine, Houston, TX77030
- Neuroscience, Baylor College of Medicine, Houston, TX77030
| | - Rosalind A. Segal
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA02115
- Department of Neurobiology, Harvard Medical School, Boston, MA02115
| | - J. Fernando Bazan
- Unit for Structural Biology, Vlaams Instituut voor Biotechnologie-UGent Center for Inflammation Research, 9052Ghent, Belgium
| | - Kelly A. Smith
- Department of Anatomy & Physiology, The University of Melbourne, Melbourne, VIC3010, Australia
| | - Jeffrey A. Golden
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA90048
| | - Ginam Cho
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA90048
| | - Christopher A. Walsh
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA02115
- Harvard-Massachusetts Institute of Technology MD/PhD Program, Program in Neuroscience, Harvard Medical School, Boston, MA02115
- Howard Hughes Medical Institute, Boston Children’s Hospital Boston, Boston, MA02115
- Department of Pediatrics, Harvard Medical School, Boston, MA02115
- Department of Neurology, Harvard Medical School, Boston, MA02115
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9
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Morgan KJ, Doggett K, Geng F, Mieruszynski S, Whitehead L, Smith KA, Hogan BM, Simons C, Baillie GJ, Molania R, Papenfuss AT, Hall TE, Ober EA, Stainier DYR, Gong Z, Heath JK. ahctf1 and kras mutations combine to amplify oncogenic stress and restrict liver overgrowth in a zebrafish model of hepatocellular carcinoma. eLife 2023; 12:73407. [PMID: 36648336 PMCID: PMC9897728 DOI: 10.7554/elife.73407] [Citation(s) in RCA: 1] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 01/16/2023] [Indexed: 01/18/2023] Open
Abstract
The nucleoporin (NUP) ELYS, encoded by AHCTF1, is a large multifunctional protein with essential roles in nuclear pore assembly and mitosis. Using both larval and adult zebrafish models of hepatocellular carcinoma (HCC), in which the expression of an inducible mutant kras transgene (krasG12V) drives hepatocyte-specific hyperplasia and liver enlargement, we show that reducing ahctf1 gene dosage by 50% markedly decreases liver volume, while non-hyperplastic tissues are unaffected. We demonstrate that in the context of cancer, ahctf1 heterozygosity impairs nuclear pore formation, mitotic spindle assembly, and chromosome segregation, leading to DNA damage and activation of a Tp53-dependent transcriptional programme that induces cell death and cell cycle arrest. Heterozygous expression of both ahctf1 and ranbp2 (encoding a second nucleoporin), or treatment of heterozygous ahctf1 larvae with the nucleocytoplasmic transport inhibitor, Selinexor, completely blocks krasG12V-driven hepatocyte hyperplasia. Gene expression analysis of patient samples in the liver hepatocellular carcinoma (LIHC) dataset in The Cancer Genome Atlas shows that high expression of one or more of the transcripts encoding the 10 components of the NUP107-160 subcomplex, which includes AHCTF1, is positively correlated with worse overall survival. These results provide a strong and feasible rationale for the development of novel cancer therapeutics that target ELYS function and suggest potential avenues for effective combinatorial treatments.
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Affiliation(s)
- Kimberly J Morgan
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical ResearchParkvilleAustralia
- Department of Medical Biology, University of MelbourneParkvilleAustralia
| | - Karen Doggett
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical ResearchParkvilleAustralia
- Department of Medical Biology, University of MelbourneParkvilleAustralia
| | - Fansuo Geng
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical ResearchParkvilleAustralia
- Department of Medical Biology, University of MelbourneParkvilleAustralia
| | - Stephen Mieruszynski
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical ResearchParkvilleAustralia
- Department of Medical Biology, University of MelbourneParkvilleAustralia
| | - Lachlan Whitehead
- Department of Medical Biology, University of MelbourneParkvilleAustralia
- Centre for Dynamic Imaging, Advanced Technology and Biology Division, Walter and Eliza Hall Institute of Medical ResearchParkvilleAustralia
| | - Kelly A Smith
- Department of Physiology, University of MelbourneParkvilleAustralia
- Institute for Molecular Biosciences, University of QueenslandQueenslandAustralia
| | - Benjamin M Hogan
- Institute for Molecular Biosciences, University of QueenslandQueenslandAustralia
- Peter MacCallum Cancer CentreMelbourneAustralia
| | - Cas Simons
- Institute for Molecular Biosciences, University of QueenslandQueenslandAustralia
- Murdoch Children's Research InstituteParkvilleAustralia
| | - Gregory J Baillie
- Institute for Molecular Biosciences, University of QueenslandQueenslandAustralia
| | - Ramyar Molania
- Department of Medical Biology, University of MelbourneParkvilleAustralia
- Bioinformatics Division, Walter and Eliza Hall Institute of Medical ResearchParkvilleAustralia
| | - Anthony T Papenfuss
- Department of Medical Biology, University of MelbourneParkvilleAustralia
- Bioinformatics Division, Walter and Eliza Hall Institute of Medical ResearchParkvilleAustralia
| | - Thomas E Hall
- Institute for Molecular Biosciences, University of QueenslandQueenslandAustralia
| | - Elke A Ober
- Danish Stem Cell Center, University of CopenhagenCopenhagenDenmark
| | - Didier YR Stainier
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung ResearchBad NauheimGermany
| | - Zhiyuan Gong
- Department of Biological Science, National University of SingaporeSingaporeSingapore
| | - Joan K Heath
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical ResearchParkvilleAustralia
- Department of Medical Biology, University of MelbourneParkvilleAustralia
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10
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Smith KA, Lin AH, Stevens AH, Yu SM, Weiss JA, Timmins LH. Collagen Molecular Damage is a Hallmark of Early Atherosclerosis Development. J Cardiovasc Transl Res 2022; 16:463-472. [PMID: 36097314 DOI: 10.1007/s12265-022-10316-y] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 08/30/2022] [Indexed: 10/14/2022]
Abstract
Remodeling of extracellular matrix proteins underlies the development of cardiovascular disease. Herein, we utilized a novel molecular probe, collagen hybridizing peptide (CHP), to target collagen molecular damage during atherogenesis. The thoracic aorta was dissected from ApoE-/- mice that had been on a high-fat diet for 0-18 weeks. Using an optimized protocol, tissues were stained with Cy3-CHP and digested to quantify CHP with a microplate assay. Results demonstrated collagen molecular damage, inferred from Cy3-CHP fluorescence, was a function of location and time on the high-fat diet. Tissue from the aortic arch showed a significant increase in collagen molecular damage after 18 weeks, while no change was observed in tissue from the descending aorta. No spatial differences in fluorescence were observed between the superior and inferior arch tissue. Our results provide insight into the early changes in collagen during atherogenesis and present a new opportunity in the subclinical diagnosis of atherosclerosis.
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Affiliation(s)
- Kelly A Smith
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Allen H Lin
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, 84112, USA.,Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, UT, 84112, USA
| | - Alexander H Stevens
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - S Michael Yu
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, 84112, USA.,Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT, 84112, USA
| | - Jeffrey A Weiss
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, 84112, USA.,Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, UT, 84112, USA.,Department of Orthopaedics, University of Utah, Salt Lake City, UT, 84112, USA
| | - Lucas H Timmins
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, 84112, USA. .,Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, UT, 84112, USA.
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11
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McHugh T, Sommer DD, Thamboo A, Tewfik MA, Smith KA. Correction: Image guidance system use amongst Canadian otolaryngologists: a nationwide survey. J Otolaryngol Head Neck Surg 2022; 51:31. [PMID: 35902983 PMCID: PMC9336095 DOI: 10.1186/s40463-022-00589-3] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- T McHugh
- Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, McGill University, Montreal, QC, Canada.
| | - D D Sommer
- Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, McGill University, Montreal, QC, Canada
| | - A Thamboo
- Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, McGill University, Montreal, QC, Canada.,Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
| | - M A Tewfik
- Department of Otolaryngology, Head and Neck Surgery, University of Manitoba, Winnipeg, MB, Canada
| | - K A Smith
- ENT Clinic, The Montreal Children's Hospital, 1001 Boulevard Décarie, A.RC.4221, Montréal, QC, H4A 3J1, Canada
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12
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McHugh T, Sommer DD, ThambooTewfik AM, Smith KA, McHugh T. Image guidance system use amongst Canadian otolaryngologists: a nationwide survey. J Otolaryngol Head Neck Surg 2022; 51:27. [PMID: 35698181 PMCID: PMC9190092 DOI: 10.1186/s40463-022-00581-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 02/14/2022] [Accepted: 05/12/2022] [Indexed: 11/17/2022] Open
Abstract
Background The use of image guidance systems has gained widespread acceptance as an adjunctive tool for endoscopic sinus surgery. However, the accessibility and usage of this technology is variable across hospitals in Canada.
Study objective The aim of this study is to investigate the availability, usage, and related issues surrounding the use of image guidance systems in endoscopic sinus surgery across Canadian otolaryngology practice settings. Methods An online survey was electronically distributed to practicing otolaryngologists across Canada. The survey contained 27 questions pertaining to the availability, usage, barriers and overall experience of image guidance systems. Results The survey was electronically sent to a total of 654 Canadian otolaryngologists of which 158 responded (response rate 24.2%). Image guidance was available to 56.3% of respondents. Of the respondents without access to IGS, 85.5% indicated they would use it if it was available. Financial (capital cost) was identified as the most important barrier in obtaining IGS by 76.3% of respondents. Conclusion Over half of Canadian otolaryngologists have access to IGS with over 85% of those without access interested in using it if it was made available. A multitude of different factors contribute to this disparity. We hope that the results of this study will help support Canadian otolaryngologists to access IGS. Graphical Abstract ![]()
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Affiliation(s)
- T McHugh
- Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, McGill University, Montreal, QC, Canada
| | - D D Sommer
- Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - A Ma ThambooTewfik
- Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, McGill University, Montreal, QC, Canada.,Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
| | - K A Smith
- Department of Otolaryngology, Head and Neck Surgery, University of Manitoba, Winnipeg, MB, Canada
| | - Tobial McHugh
- A.RC.4221 ENT Clinic, The Montreal Children's Hospital, 1001 Boulevard Décarie, Montréal, QC, H4A 3J1, Canada.
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13
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Capon SJ, Uribe V, Dominado N, Ehrlich O, Smith KA. Endocardial identity is established during early somitogenesis by Bmp signalling acting upstream of npas4l and etv2. Development 2022; 149:275317. [PMID: 35531980 PMCID: PMC9148566 DOI: 10.1242/dev.190421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/10/2020] [Accepted: 03/28/2022] [Indexed: 12/28/2022]
Abstract
The endocardium plays important roles in the development and function of the vertebrate heart; however, few molecular markers of this tissue have been identified and little is known about what regulates its differentiation. Here, we describe the Gt(SAGFF27C); Tg(4xUAS:egfp) line as a marker of endocardial development in zebrafish. Transcriptomic comparison between endocardium and pan-endothelium confirms molecular distinction between these populations and time-course analysis suggests differentiation as early as eight somites. To investigate what regulates endocardial identity, we employed npas4l, etv2 and scl loss-of-function models. Endocardial expression is lost in npas4l mutants, significantly reduced in etv2 mutants and only modestly affected upon scl loss-of-function. Bmp signalling was also examined: overactivation of Bmp signalling increased endocardial expression, whereas Bmp inhibition decreased expression. Finally, epistasis experiments showed that overactivation of Bmp signalling was incapable of restoring endocardial expression in etv2 mutants. By contrast, overexpression of either npas4l or etv2 was sufficient to rescue endocardial expression upon Bmp inhibition. Together, these results describe the differentiation of the endocardium, distinct from vasculature, and place npas4l and etv2 downstream of Bmp signalling in regulating its differentiation. Summary: A zebrafish transgenic reporter of the endocardium is identified, permitting transcriptomic analysis and identification of new endocardial markers. Epistasis experiments demonstrate npas4l and etv2 act downstream of Bmp signalling to regulate endocardial differentiation.
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Affiliation(s)
- Samuel J Capon
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Veronica Uribe
- Department of Anatomy & Physiology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Nicole Dominado
- Department of Anatomy & Physiology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Ophelia Ehrlich
- Department of Anatomy & Physiology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Kelly A Smith
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia.,Department of Anatomy & Physiology, The University of Melbourne, Melbourne, Victoria 3010, Australia
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14
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Chronis-Tuscano A, Novick DR, Danko CM, Smith KA, Wagner NJ, Wang CH, Druskin L, Dougherty LR, Rubin KH. Early intervention for inhibited young children: a randomized controlled trial comparing the Turtle Program and Cool Little Kids. J Child Psychol Psychiatry 2022; 63:273-281. [PMID: 34184792 DOI: 10.1111/jcpp.13475] [Citation(s) in RCA: 3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/20/2021] [Indexed: 01/23/2023]
Abstract
BACKGROUND Children classified as behaviorally inhibited (BI) are at risk for social anxiety. Risk for anxiety is moderated by both parental behavior and social-emotional competence. Grounded in developmental-transactional theory, the Turtle Program involves both parent and child treatment components delivered within the peer context. Our pilot work demonstrated beneficial effects of the Turtle Program ('Turtle') over a waitlist control group. Herein, we report results of a rigorous randomized controlled trial (RCT) comparing Turtle to the best available treatment for young children high in BI, Cool Little Kids (CLK). METHODS One hundred and fifty-one parents and their 3.5- to 5-year-old children selected on the basis of BI were randomly assigned to Turtle or CLK, delivered in group format over 8 weeks. Effects on child anxiety, life interference, BI, and observed parenting were examined at post-treatment and 1-year follow-up. ClinicalTrials.gov registration: NCT02308826. RESULTS No significant main effect differences were found between Turtle and CLK on child anxiety; children in both programs evidenced significant improvements in BI, anxiety severity, family accommodation, and child impairment. However, Turtle yielded increased observed warm/engaged parenting and decreased observed negative control, compared with CLK. Parental social anxiety moderated effects; parents with higher anxiety demonstrated diminished improvements in child impairment, and parent accommodation in CLK, but not in Turtle. Children of parents with higher anxiety demonstrated more improvements in child BI in Turtle, but not in CLK. CONCLUSIONS Turtle and CLK are both effective early interventions for young children with BI. Turtle is more effective in improving parenting behaviors associated with the development and maintenance of child anxiety. Turtle also proved to be more effective than CLK for parents with social anxiety. Results suggest that Turtle should be recommended when parents have social anxiety; however, in the absence of parent anxiety, CLK may offer a more efficient treatment model.
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Affiliation(s)
| | - Danielle R Novick
- Department of Psychology, University of Maryland, College Park, MD, USA
| | - Christina M Danko
- Department of Psychology, University of Maryland, College Park, MD, USA
| | - Kelly A Smith
- Department of Human Development and Quantitative Methodology, University of Maryland, College Park, MD, USA
| | - Nicholas J Wagner
- Department of Psychological and Brain Sciences, Boston University, Boston, MA, USA
| | - Christine H Wang
- Division of Endocrinology and Diabetes, Children's National Hospital, Washington, DC, USA
| | - Lindsay Druskin
- Department of Psychology, West Virginia University, Morgantown, WV, USA
| | - Lea R Dougherty
- Department of Psychology, University of Maryland, College Park, MD, USA
| | - Kenneth H Rubin
- Department of Human Development and Quantitative Methodology, University of Maryland, College Park, MD, USA
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15
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Lo HP, Lim YW, Xiong Z, Martel N, Ferguson C, Ariotti N, Giacomotto J, Rae J, Floetenmeyer M, Moradi SV, Gao Y, Tillu VA, Xia D, Wang H, Rahnama S, Nixon SJ, Bastiani M, Day RD, Smith KA, Palpant NJ, Johnston WA, Alexandrov K, Collins BM, Hall TE, Parton RG. Cavin4 interacts with Bin1 to promote T-tubule formation and stability in developing skeletal muscle. J Cell Biol 2021; 220:e201905065. [PMID: 34633413 PMCID: PMC8513623 DOI: 10.1083/jcb.201905065] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/02/2021] [Accepted: 09/20/2021] [Indexed: 11/22/2022] Open
Abstract
The cavin proteins are essential for caveola biogenesis and function. Here, we identify a role for the muscle-specific component, Cavin4, in skeletal muscle T-tubule development by analyzing two vertebrate systems, mouse and zebrafish. In both models, Cavin4 localized to T-tubules, and loss of Cavin4 resulted in aberrant T-tubule maturation. In zebrafish, which possess duplicated cavin4 paralogs, Cavin4b was shown to directly interact with the T-tubule-associated BAR domain protein Bin1. Loss of both Cavin4a and Cavin4b caused aberrant accumulation of interconnected caveolae within the T-tubules, a fragmented T-tubule network enriched in Caveolin-3, and an impaired Ca2+ response upon mechanical stimulation. We propose a role for Cavin4 in remodeling the T-tubule membrane early in development by recycling caveolar components from the T-tubule to the sarcolemma. This generates a stable T-tubule domain lacking caveolae that is essential for T-tubule function.
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Affiliation(s)
- Harriet P. Lo
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Ye-Wheen Lim
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Zherui Xiong
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Nick Martel
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Charles Ferguson
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Nicholas Ariotti
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Jean Giacomotto
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia
- Queensland Centre for Mental Health Research, West Moreton Hospital and Health Service and University of Queensland, Brisbane, Queensland, Australia
| | - James Rae
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Matthias Floetenmeyer
- Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
| | - Shayli Varasteh Moradi
- CSIRO–Queensland University of Technology Synthetic Biology Alliance, ARC Centre of Excellence in Synthetic Biology, Centre for Agriculture and the Bioeconomy, School of Biology and Environmental Science, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Ya Gao
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Vikas A. Tillu
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Di Xia
- Genome Innovation Hub, The University of Queensland, Brisbane, Queensland, Australia
| | - Huang Wang
- Translational Research Institute, Mater Research Institute, The University of Queensland, Brisbane, Queensland, Australia
| | - Samira Rahnama
- CSIRO–Queensland University of Technology Synthetic Biology Alliance, ARC Centre of Excellence in Synthetic Biology, Centre for Agriculture and the Bioeconomy, School of Biology and Environmental Science, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Susan J. Nixon
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Michele Bastiani
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Ryan D. Day
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Kelly A. Smith
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Nathan J. Palpant
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Wayne A. Johnston
- CSIRO–Queensland University of Technology Synthetic Biology Alliance, ARC Centre of Excellence in Synthetic Biology, Centre for Agriculture and the Bioeconomy, School of Biology and Environmental Science, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Kirill Alexandrov
- CSIRO–Queensland University of Technology Synthetic Biology Alliance, ARC Centre of Excellence in Synthetic Biology, Centre for Agriculture and the Bioeconomy, School of Biology and Environmental Science, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Brett M. Collins
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Thomas E. Hall
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Robert G. Parton
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
- Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
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16
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Koltowska K, Okuda KS, Gloger M, Rondon-Galeano M, Mason E, Xuan J, Dudczig S, Chen H, Arnold H, Skoczylas R, Bower NI, Paterson S, Lagendijk AK, Baillie GJ, Leshchiner I, Simons C, Smith KA, Goessling W, Heath JK, Pearson RB, Sanij E, Schulte-Merker S, Hogan BM. The RNA helicase Ddx21 controls Vegfc-driven developmental lymphangiogenesis by balancing endothelial cell ribosome biogenesis and p53 function. Nat Cell Biol 2021; 23:1136-1147. [PMID: 34750583 DOI: 10.1038/s41556-021-00784-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 09/27/2021] [Indexed: 12/13/2022]
Abstract
The development of a functional vasculature requires the coordinated control of cell fate, lineage differentiation and network growth. Cellular proliferation is spatiotemporally regulated in developing vessels, but how this is orchestrated in different lineages is unknown. Here, using a zebrafish genetic screen for lymphatic-deficient mutants, we uncover a mutant for the RNA helicase Ddx21. Ddx21 cell-autonomously regulates lymphatic vessel development. An established regulator of ribosomal RNA synthesis and ribosome biogenesis, Ddx21 is enriched in sprouting venous endothelial cells in response to Vegfc-Flt4 signalling. Ddx21 function is essential for Vegfc-Flt4-driven endothelial cell proliferation. In the absence of Ddx21, endothelial cells show reduced ribosome biogenesis, p53 and p21 upregulation and cell cycle arrest that blocks lymphangiogenesis. Thus, Ddx21 coordinates the lymphatic endothelial cell response to Vegfc-Flt4 signalling by balancing ribosome biogenesis and p53 function. This mechanism may be targetable in diseases of excessive lymphangiogenesis such as cancer metastasis or lymphatic malformation.
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Affiliation(s)
- Katarzyna Koltowska
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia. .,Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
| | - Kazuhide S Okuda
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia.,Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
| | - Marleen Gloger
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Maria Rondon-Galeano
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia.,Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
| | - Elizabeth Mason
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
| | - Jiachen Xuan
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
| | - Stefanie Dudczig
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
| | - Huijun Chen
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia
| | - Hannah Arnold
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Renae Skoczylas
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Neil I Bower
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia
| | - Scott Paterson
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia.,Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
| | - Anne Karine Lagendijk
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia
| | - Gregory J Baillie
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia
| | - Ignaty Leshchiner
- Massachusetts General Hospital, Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA, USA.,Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Cas Simons
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia.,Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia
| | - Kelly A Smith
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia.,Department of Anatomy and Physiology, University of Melbourne, Parkville, Victoria, Australia
| | - Wolfram Goessling
- Massachusetts General Hospital, Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA, USA
| | - Joan K Heath
- Epigenetics and Development Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Richard B Pearson
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia.,Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - Elaine Sanij
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia.,Department of Clinical Pathology, University of Melbourne, Parkville, Victoria, Australia.,St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia
| | - Stefan Schulte-Merker
- Institute of Cardiovascular Organogenesis and Regeneration, Medical Faculty, WWU Münster, Münster, Germany.,Hubrecht Institute-KNAW and University Medical Centre, Utrecht, The Netherlands
| | - Benjamin M Hogan
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland, Australia. .,Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia. .,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia. .,Department of Anatomy and Physiology, University of Melbourne, Parkville, Victoria, Australia. .,Hubrecht Institute-KNAW and University Medical Centre, Utrecht, The Netherlands.
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17
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Smith KA, Uribe V. Getting to the Heart of Left-Right Asymmetry: Contributions from the Zebrafish Model. J Cardiovasc Dev Dis 2021; 8:64. [PMID: 34199828 PMCID: PMC8230053 DOI: 10.3390/jcdd8060064] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 12/28/2022] Open
Abstract
The heart is laterally asymmetric. Not only is it positioned on the left side of the body but the organ itself is asymmetric. This patterning occurs across scales: at the organism level, through left-right axis patterning; at the organ level, where the heart itself exhibits left-right asymmetry; at the cellular level, where gene expression, deposition of matrix and proteins and cell behaviour are asymmetric; and at the molecular level, with chirality of molecules. Defective left-right patterning has dire consequences on multiple organs; however, mortality and morbidity arising from disrupted laterality is usually attributed to complex cardiac defects, bringing into focus the particulars of left-right patterning of the heart. Laterality defects impact how the heart integrates and connects with neighbouring organs, but the anatomy of the heart is also affected because of its asymmetry. Genetic studies have demonstrated that cardiac asymmetry is influenced by left-right axis patterning and yet the heart also possesses intrinsic laterality, reinforcing the patterning of this organ. These inputs into cardiac patterning are established at the very onset of left-right patterning (formation of the left-right organiser) and continue through propagation of left-right signals across animal axes, asymmetric differentiation of the cardiac fields, lateralised tube formation and asymmetric looping morphogenesis. In this review, we will discuss how left-right asymmetry is established and how that influences subsequent asymmetric development of the early embryonic heart. In keeping with the theme of this issue, we will focus on advancements made through studies using the zebrafish model and describe how its use has contributed considerable knowledge to our understanding of the patterning of the heart.
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Affiliation(s)
- Kelly A. Smith
- Department of Physiology, The University of Melbourne, Parkville, VIC 3010, Australia;
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18
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Chan Y, Angel D, Aron M, Hartl T, Moubayed SP, Smith KA, Sommer DD, Sowerby L, Spafford P, Mertz D, Witterick IJ. CSO (Canadian Society of Otolaryngology - Head & Neck Surgery) position paper on return to Otolaryngology - Head & Neck Surgery Clinic Practice during the COVID-19 pandemic in Canada. J Otolaryngol Head Neck Surg 2020; 49:76. [PMID: 33106189 PMCID: PMC7586368 DOI: 10.1186/s40463-020-00466-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/16/2020] [Indexed: 12/14/2022] Open
Abstract
The novel Coronavirus (COVID-19) has created a worldwide deadly pandemic that has become a major public health challenge. All semi-urgent and elective medical care has come to a halt to conserve capacity to care for patients during this pandemic. As the numbers of COVID-19 cases decrease across Canada, our healthcare system also began to reopen various facilities and medical offices. The aim for this document is to compile the current evidence and provide expert consensus on the safe return to clinic practice in Otolaryngology - Head & Neck Surgery. These recommendations will also summarize general precaution principles and practical tips for office across Canada to optimize patient and provider safety. Risk assessment and patient selection are crucial to minimizing exposure to COVID-19. Controversial topics such as COVID-19 mode of transmission, duration of exposure, personal protective equipment, and aerosol-generating procedures will be analyzed and discussed. Practical solutions of pre-visit office preparation, front office and examination room set-up, and check out procedures are explored. Specific considerations for audiology, pediatric population, and high risk AGMPs are also addressed. Given that the literature surrounding COVID-19 is rapidly evolving, these guidelines will serve to start our specialty back into practice over the next weeks to months and they may change as we learn more about this disease.
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Affiliation(s)
- Y Chan
- Department of Otolaryngology - Head & Neck Surgery, University of Toronto, Toronto, ON, Canada.
| | - D Angel
- Division of Otolaryngology - Head & Neck Surgery, Memorial University of Newfoundland, St. John's, NL, Canada
| | - M Aron
- Division of Otolaryngology - Head & Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
| | - T Hartl
- Division of Otolaryngology - Head & Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
| | - S P Moubayed
- Division of Otolaryngology - Head & Neck Surgery, University of Montreal, Montreal, QC, Canada
| | - K A Smith
- Department of Otolaryngology - Head & Neck Surgery, University of Manitoba, Winnipeg, MB, Canada
| | - D D Sommer
- Otolaryngology - Head & Neck Surgery Division, Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - L Sowerby
- Department of Otolaryngology - Head & Neck Surgery, Western University, London, ON, Canada
| | - P Spafford
- Division of Otolaryngology - Head and Neck Surgery, Department of Surgery, University of Saskatchewan, Saskatoon, SK, Canada
| | - D Mertz
- Division of Infectious Diseases, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - I J Witterick
- Department of Otolaryngology - Head & Neck Surgery, University of Toronto, Toronto, ON, Canada
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19
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Novick DR, Smith KA, Barstead MG, Danko CM, Rubin KH, Druskin L, Badders RN, Dougherty L, Chronis-Tuscano A. Predictors and Moderators of Parent Engagement in Early Interventions for Behaviorally Inhibited Preschool-Aged Children. ACTA ACUST UNITED AC 2020. [DOI: 10.1080/23794925.2020.1784060] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - Kelly A. Smith
- Department of Human Development & Quantitative Methodology, University of Maryland, College Park, USA
| | - Matthew G. Barstead
- Department of Human Development & Quantitative Methodology, University of Maryland, College Park, USA
| | | | - Kenneth H. Rubin
- Department of Human Development & Quantitative Methodology, University of Maryland, College Park, USA
| | - Lindsay Druskin
- Department of Human Development & Quantitative Methodology, University of Maryland, College Park, USA
| | | | - Lea Dougherty
- Department of Psychology, University of Maryland, College Park, USA
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20
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Chaudhury S, Okuda KS, Koltowska K, Lagendijk AK, Paterson S, Baillie GJ, Simons C, Smith KA, Hogan BM, Bower NI. Localised Collagen2a1 secretion supports lymphatic endothelial cell migration in the zebrafish embryo. Development 2020; 147:dev.190983. [PMID: 32839180 DOI: 10.1242/dev.190983] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 03/27/2020] [Accepted: 08/07/2020] [Indexed: 01/12/2023]
Abstract
The lymphatic vasculature develops primarily from pre-existing veins. A pool of lymphatic endothelial cells (LECs) first sprouts from cardinal veins followed by migration and proliferation to colonise embryonic tissues. Although much is known about the molecular regulation of LEC fate and sprouting during early lymphangiogenesis, we know far less about the instructive and permissive signals that support LEC migration through the embryo. Using a forward genetic screen, we identified mbtps1 and sec23a, components of the COP-II protein secretory pathway, as essential for developmental lymphangiogenesis. In both mutants, LECs initially depart the cardinal vein but then fail in their ongoing migration. A key cargo that failed to be secreted in both mutants was a type II collagen (Col2a1). Col2a1 is normally secreted by notochord sheath cells, alongside which LECs migrate. col2a1a mutants displayed defects in the migratory behaviour of LECs and failed lymphangiogenesis. These studies thus identify Col2a1 as a key cargo secreted by notochord sheath cells and required for the migration of LECs. These findings combine with our current understanding to suggest that successive cell-to-cell and cell-matrix interactions regulate the migration of LECs through the embryonic environment during development.
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Affiliation(s)
- Smrita Chaudhury
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Kazuhide S Okuda
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia.,Peter MacCallum Cancer Centre, Organogenesis and Cancer Program, Melbourne, Victoria 3000, Australia
| | - Katarzyna Koltowska
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Anne K Lagendijk
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Scott Paterson
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia.,Peter MacCallum Cancer Centre, Organogenesis and Cancer Program, Melbourne, Victoria 3000, Australia
| | - Gregory J Baillie
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Cas Simons
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Kelly A Smith
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia.,Department of Physiology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Benjamin M Hogan
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia .,Peter MacCallum Cancer Centre, Organogenesis and Cancer Program, Melbourne, Victoria 3000, Australia.,Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Neil I Bower
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
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21
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22
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Hoxworth JM, Eschbacher JM, Gonzales AC, Singleton KW, Leon GD, Smith KA, Stokes AM, Zhou Y, Mazza GL, Porter AB, Mrugala MM, Zimmerman RS, Bendok BR, Patra DP, Krishna C, Boxerman JL, Baxter LC, Swanson KR, Quarles CC, Schmainda KM, Hu LS. Performance of Standardized Relative CBV for Quantifying Regional Histologic Tumor Burden in Recurrent High-Grade Glioma: Comparison against Normalized Relative CBV Using Image-Localized Stereotactic Biopsies. AJNR Am J Neuroradiol 2020; 41:408-415. [PMID: 32165359 DOI: 10.3174/ajnr.a6486] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 12/23/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Perfusion MR imaging measures of relative CBV can distinguish recurrent tumor from posttreatment radiation effects in high-grade gliomas. Currently, relative CBV measurement requires normalization based on user-defined reference tissues. A recently proposed method of relative CBV standardization eliminates the need for user input. This study compares the predictive performance of relative CBV standardization against relative CBV normalization for quantifying recurrent tumor burden in high-grade gliomas relative to posttreatment radiation effects. MATERIALS AND METHODS We recruited 38 previously treated patients with high-grade gliomas (World Health Organization grades III or IV) undergoing surgical re-resection for new contrast-enhancing lesions concerning for recurrent tumor versus posttreatment radiation effects. We recovered 112 image-localized biopsies and quantified the percentage of histologic tumor content versus posttreatment radiation effects for each sample. We measured spatially matched normalized and standardized relative CBV metrics (mean, median) and fractional tumor burden for each biopsy. We compared relative CBV performance to predict tumor content, including the Pearson correlation (r), against histologic tumor content (0%-100%) and the receiver operating characteristic area under the curve for predicting high-versus-low tumor content using binary histologic cutoffs (≥50%; ≥80% tumor). RESULTS Across relative CBV metrics, fractional tumor burden showed the highest correlations with tumor content (0%-100%) for normalized (r = 0.63, P < .001) and standardized (r = 0.66, P < .001) values. With binary cutoffs (ie, ≥50%; ≥80% tumor), predictive accuracies were similar for both standardized and normalized metrics and across relative CBV metrics. Median relative CBV achieved the highest area under the curve (normalized = 0.87, standardized = 0.86) for predicting ≥50% tumor, while fractional tumor burden achieved the highest area under the curve (normalized = 0.77, standardized = 0.80) for predicting ≥80% tumor. CONCLUSIONS Standardization of relative CBV achieves similar performance compared with normalized relative CBV and offers an important step toward workflow optimization and consensus methodology.
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Affiliation(s)
- J M Hoxworth
- From the Departments of Radiology (J.M.H., Y.Z., L.S.H.)
| | | | | | - K W Singleton
- Precision Neurotherapeutics Lab (K.W.S., G.D.L., B.R.B., K.R.S.), Mayo Clinic in Arizona, Phoenix, Arizona
| | - G D Leon
- Precision Neurotherapeutics Lab (K.W.S., G.D.L., B.R.B., K.R.S.), Mayo Clinic in Arizona, Phoenix, Arizona
| | - K A Smith
- Keller Center for Imaging Innovation (A.M.S.), Barrow Neurological Institute, Phoenix, Arizona
| | - A M Stokes
- Keller Center for Imaging Innovation (A.M.S.), Barrow Neurological Institute, Phoenix, Arizona
| | - Y Zhou
- From the Departments of Radiology (J.M.H., Y.Z., L.S.H.)
| | - G L Mazza
- Department of Health Sciences Research (G.L.M.), Division of Biomedical Statistics and Informatics, Mayo Clinic Scottsdale, Scottsdale, Arizona
| | | | | | | | - B R Bendok
- Precision Neurotherapeutics Lab (K.W.S., G.D.L., B.R.B., K.R.S.), Mayo Clinic in Arizona, Phoenix, Arizona
| | - D P Patra
- Departments of Neurosurgery (D.P.P.)
| | | | - J L Boxerman
- Department of Diagnostic Imaging (J.L.B.), Rhode Island Hospital, Providence, Rhode Island
| | - L C Baxter
- Neuropsychology (L.C.B.), Mayo Clinic Hospital, Phoenix, Arizona
| | - K R Swanson
- Precision Neurotherapeutics Lab (K.W.S., G.D.L., B.R.B., K.R.S.), Mayo Clinic in Arizona, Phoenix, Arizona
| | | | - K M Schmainda
- Department of Radiology (K.M.S.), Medical College of Wisconsin, Milwaukee, Wisconsin
| | - L S Hu
- From the Departments of Radiology (J.M.H., Y.Z., L.S.H.)
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23
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Baek S, Oh TG, Secker G, Sutton DL, Okuda KS, Paterson S, Bower NI, Toubia J, Koltowska K, Capon SJ, Baillie GJ, Simons C, Muscat GEO, Lagendijk AK, Smith KA, Harvey NL, Hogan BM. The Alternative Splicing Regulator Nova2 Constrains Vascular Erk Signaling to Limit Specification of the Lymphatic Lineage. Dev Cell 2020; 49:279-292.e5. [PMID: 31014480 DOI: 10.1016/j.devcel.2019.03.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [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: 10/06/2017] [Revised: 01/30/2019] [Accepted: 03/19/2019] [Indexed: 02/06/2023]
Abstract
The correct assignment of cell fate within fields of multipotent progenitors is essential for accurate tissue diversification. The first lymphatic vessels arise from pre-existing veins after venous endothelial cells become specified as lymphatic progenitors. Prox1 specifies lymphatic fate and labels these progenitors; however, the mechanisms restricting Prox1 expression and limiting the progenitor pool remain unknown. We identified a zebrafish mutant that displayed premature, expanded, and prolonged lymphatic specification. The gene responsible encodes the regulator of alternative splicing, Nova2. In zebrafish and human endothelial cells, Nova2 selectively regulates pre-mRNA splicing for components of signaling pathways and phosphoproteins. Nova2-deficient endothelial cells display increased Mapk/Erk signaling, and Prox1 expression is dynamically controlled by Erk signaling. We identify a mechanism whereby Nova2-regulated splicing constrains Erk signaling, thus limiting lymphatic progenitor cell specification. This identifies the capacity of a factor that tunes mRNA splicing to control assignment of cell fate during vascular differentiation.
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Affiliation(s)
- Sungmin Baek
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Tae Gyu Oh
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Genevieve Secker
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
| | - Drew L Sutton
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
| | - Kazuhide S Okuda
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Scott Paterson
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Neil I Bower
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - John Toubia
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia; Australian Cancer Research, Centre for Cancer Biology, Foundation Cancer Genomics Facility, University of South Australia and SA Pathology, Adelaide, SA 5000, Australia
| | - Katarzyna Koltowska
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Samuel J Capon
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Gregory J Baillie
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Cas Simons
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - George E O Muscat
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Anne K Lagendijk
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Kelly A Smith
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia
| | - Natasha L Harvey
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
| | - Benjamin M Hogan
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD 4073, Australia.
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24
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Smith KA, Frazzini Padilla P, Sprague ML. 2131 Trends in Patient Follow-Up after Minimally Invasive Hysterectomy. J Minim Invasive Gynecol 2019. [DOI: 10.1016/j.jmig.2019.09.132] [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: 12/01/2022]
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25
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Cardenas LM, Bhogal A, Chadwick DR, McGeough K, Misselbrook T, Rees RM, Thorman RE, Watson CJ, Williams JR, Smith KA, Calvet S. Nitrogen use efficiency and nitrous oxide emissions from five UK fertilised grasslands. Sci Total Environ 2019; 661:696-710. [PMID: 30684838 PMCID: PMC6383039 DOI: 10.1016/j.scitotenv.2019.01.082] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 10/18/2018] [Revised: 12/31/2018] [Accepted: 01/08/2019] [Indexed: 05/15/2023]
Abstract
Intensification of grasslands is necessary to meet the increasing demand of livestock products. The application of nitrogen (N) on grasslands affects the N balance therefore the nitrogen use efficiency (NUE). Emissions of nitrous oxide (N2O) are produced due to N fertilisation and low NUE. These emissions depend on the type and rates of N applied. In this study we have compiled data from 5 UK N fertilised grassland sites (Crichton, Drayton, North Wyke, Hillsborough and Pwllpeiran) covering a range of soil types and climates. The experiments evaluated the effect of increasing rates of inorganic N fertiliser provided as ammonium nitrate (AN) or calcium ammonium nitrate (CAN). The following fertiliser strategies were also explored for a rate of 320 kg N ha-1: using the nitrification inhibitor dicyandiamide (DCD), changing to urea as an N source and splitting fertiliser applications. We measured N2O emissions for a full year in each experiment, as well as soil mineral N, climate data, pasture yield and N offtake. N2O emissions were greater at Crichton and North Wyke whereas Drayton, Hillsborough and Pwllpeiran had the smallest emissions. The resulting average emission factor (EF) of 1.12% total N applied showed a range of values for all the sites between 0.6 and 2.08%. NUE depended on the site and for an application rate of 320 kg N ha-1, N surplus was on average higher than 80 kg N ha-1, which is proposed as a maximum by the EU Nitrogen Expert Panel. N2O emissions tended to be lower when urea was applied instead of AN or CAN, and were particularly reduced when using urea with DCD. Finally, correlations between the factors studied showed that total N input was related to Nofftake and Nexcess; while cumulative emissions and EF were related to yield scaled emissions.
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Affiliation(s)
- L M Cardenas
- Rothamsted Research, Okehampton, Devon, EX20 2SB, UK.
| | - A Bhogal
- ADAS Boxworth, Battlegate Road, Boxworth, Cambridge CB23 4NN, UK
| | - D R Chadwick
- School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
| | - K McGeough
- Agri-Food and Biosciences Institute, 18a, Newforge Lane, BT9 5PX Belfast, UK
| | - T Misselbrook
- Rothamsted Research, Okehampton, Devon, EX20 2SB, UK
| | - R M Rees
- Scotland's Rural College (SRUC), King's Buildings, West Mains Road, Edinburgh EH9 3JG, UK
| | - R E Thorman
- ADAS Boxworth, Battlegate Road, Boxworth, Cambridge CB23 4NN, UK
| | - C J Watson
- Agri-Food and Biosciences Institute, 18a, Newforge Lane, BT9 5PX Belfast, UK
| | - J R Williams
- ADAS Boxworth, Battlegate Road, Boxworth, Cambridge CB23 4NN, UK
| | - K A Smith
- School of Geosciences, University of Edinburgh, Crew Building, Alexander Crum Brown Road, Edinburgh EH9 3FF, and Weston Road, Totnes TQ9 5AH, Devon, UK
| | - S Calvet
- Universitat Politècnica de València, Institute of Animal Science and Technology, Camino de Vera s.n., 46022, Valencia, Spain
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26
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Grassini DR, da Silva J, Hall TE, Baillie GJ, Simons C, Parton RG, Hogan BM, Smith KA. Myosin Vb is required for correct trafficking of N-cadherin and cardiac chamber ballooning. Dev Dyn 2019; 248:284-295. [PMID: 30801852 DOI: 10.1002/dvdy.19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 09/28/2018] [Revised: 01/29/2019] [Accepted: 01/30/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND During heart morphogenesis, the cardiac chambers undergo ballooning: a process involving regionalized elongation of cardiomyocytes. Cardiomyocyte shape changes require reorganization of the actin cytoskeleton; however, the genetic regulation of this process is not well understood. RESULTS From a forward genetic screen, we identified the zebrafish uq 23ks mutant which manifests chamber ballooning defects. Whole-genome sequencing-mapping identified a truncating mutation in the gene, myo5b. myo5b encodes an atypical myosin required for endosome recycling and, consistent with this, increased vesicles were observed in myo5b mutant cardiomyocytes. Expression of RFP-Rab11a (a recycling endosome marker) confirmed increased recycling endosomes in cardiomyocytes of myo5b mutants. To investigate potential cargo of MyoVb-associated vesicles, we examined the adherens junction protein, N-cadherin. N-cadherin appeared mispatterned at cell junctions, and an increase in the number of intracellular particles was also apparent. Co-localization with RFP-Rab11a confirmed increased N-cadherin-positive recycling endosomes, demonstrating N-cadherin trafficking is perturbed in myo5b mutants. Finally, phalloidin staining showed disorganized F-actin in myo5b cardiomyocytes, suggesting the cytoskeleton fails to remodel, obstructing chamber ballooning. CONCLUSIONS MyoVb is required for cardiomyocyte endosomal recycling and appropriate N-cadherin localization during the onset of chamber ballooning. Cardiomyocytes lacking MyoVb are unable to reorganize their actin cytoskeleton, resulting in failed chamber ballooning. Developmental Dynamics 248:284-295, 2019. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Daniela R Grassini
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Jason da Silva
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Thomas E Hall
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Gregory J Baillie
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Cas Simons
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia.,Murdoch Children's Research Institute, Parkville, Victoria, Australia
| | - Robert G Parton
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Benjamin M Hogan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Kelly A Smith
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
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27
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Hu LS, Yoon H, Eschbacher JM, Baxter LC, Dueck AC, Nespodzany A, Smith KA, Nakaji P, Xu Y, Wang L, Karis JP, Hawkins-Daarud AJ, Singleton KW, Jackson PR, Anderies BJ, Bendok BR, Zimmerman RS, Quarles C, Porter-Umphrey AB, Mrugala MM, Sharma A, Hoxworth JM, Sattur MG, Sanai N, Koulemberis PE, Krishna C, Mitchell JR, Wu T, Tran NL, Swanson KR, Li J. Accurate Patient-Specific Machine Learning Models of Glioblastoma Invasion Using Transfer Learning. AJNR Am J Neuroradiol 2019; 40:418-425. [PMID: 30819771 DOI: 10.3174/ajnr.a5981] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 12/13/2018] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE MR imaging-based modeling of tumor cell density can substantially improve targeted treatment of glioblastoma. Unfortunately, interpatient variability limits the predictive ability of many modeling approaches. We present a transfer learning method that generates individualized patient models, grounded in the wealth of population data, while also detecting and adjusting for interpatient variabilities based on each patient's own histologic data. MATERIALS AND METHODS We recruited patients with primary glioblastoma undergoing image-guided biopsies and preoperative imaging, including contrast-enhanced MR imaging, dynamic susceptibility contrast MR imaging, and diffusion tensor imaging. We calculated relative cerebral blood volume from DSC-MR imaging and mean diffusivity and fractional anisotropy from DTI. Following image coregistration, we assessed tumor cell density for each biopsy and identified corresponding localized MR imaging measurements. We then explored a range of univariate and multivariate predictive models of tumor cell density based on MR imaging measurements in a generalized one-model-fits-all approach. We then implemented both univariate and multivariate individualized transfer learning predictive models, which harness the available population-level data but allow individual variability in their predictions. Finally, we compared Pearson correlation coefficients and mean absolute error between the individualized transfer learning and generalized one-model-fits-all models. RESULTS Tumor cell density significantly correlated with relative CBV (r = 0.33, P < .001), and T1-weighted postcontrast (r = 0.36, P < .001) on univariate analysis after correcting for multiple comparisons. With single-variable modeling (using relative CBV), transfer learning increased predictive performance (r = 0.53, mean absolute error = 15.19%) compared with one-model-fits-all (r = 0.27, mean absolute error = 17.79%). With multivariate modeling, transfer learning further improved performance (r = 0.88, mean absolute error = 5.66%) compared with one-model-fits-all (r = 0.39, mean absolute error = 16.55%). CONCLUSIONS Transfer learning significantly improves predictive modeling performance for quantifying tumor cell density in glioblastoma.
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Affiliation(s)
- L S Hu
- From the Department of Radiology (L.S.H., J.M.H., J.R.M., T.W., J.L.)
| | - H Yoon
- Arizona State University (H.Y., Y.X., L.W., T.W., J.L.), Tempe, Arizona
| | | | | | - A C Dueck
- Department of Biostatistics (A.C.D.), Mayo Clinic in Arizona, Scottsdale, Arizona
| | | | | | - P Nakaji
- Neurosurgery (K.A.S., P.N., N.S.)
| | - Y Xu
- Arizona State University (H.Y., Y.X., L.W., T.W., J.L.), Tempe, Arizona
| | - L Wang
- Arizona State University (H.Y., Y.X., L.W., T.W., J.L.), Tempe, Arizona
| | | | - A J Hawkins-Daarud
- Precision Neurotherapeutics Lab (A.J.H.-D., K.W.S., P.R.J, B.R.B., K.R.S.)
| | - K W Singleton
- Precision Neurotherapeutics Lab (A.J.H.-D., K.W.S., P.R.J, B.R.B., K.R.S.)
| | - P R Jackson
- Precision Neurotherapeutics Lab (A.J.H.-D., K.W.S., P.R.J, B.R.B., K.R.S.)
| | - B J Anderies
- Department of Neurosurgery (B.J.A., B.R.B., R.S.Z., M.G.S., P.E.K., C.K., K.R.S.)
| | - B R Bendok
- Precision Neurotherapeutics Lab (A.J.H.-D., K.W.S., P.R.J, B.R.B., K.R.S.).,Department of Neurosurgery (B.J.A., B.R.B., R.S.Z., M.G.S., P.E.K., C.K., K.R.S.)
| | - R S Zimmerman
- Department of Neurosurgery (B.J.A., B.R.B., R.S.Z., M.G.S., P.E.K., C.K., K.R.S.)
| | - C Quarles
- Neuroimaging Research (C.Q.), Barrow Neurological Institute, Phoenix, Arizona
| | | | - M M Mrugala
- Department of Neuro-Oncology (A.B.P.-U., M.M.M., A.S.)
| | - A Sharma
- Department of Neuro-Oncology (A.B.P.-U., M.M.M., A.S.)
| | - J M Hoxworth
- From the Department of Radiology (L.S.H., J.M.H., J.R.M., T.W., J.L.)
| | - M G Sattur
- Department of Neurosurgery (B.J.A., B.R.B., R.S.Z., M.G.S., P.E.K., C.K., K.R.S.)
| | - N Sanai
- Neurosurgery (K.A.S., P.N., N.S.)
| | - P E Koulemberis
- Department of Neurosurgery (B.J.A., B.R.B., R.S.Z., M.G.S., P.E.K., C.K., K.R.S.)
| | - C Krishna
- Department of Neurosurgery (B.J.A., B.R.B., R.S.Z., M.G.S., P.E.K., C.K., K.R.S.)
| | - J R Mitchell
- From the Department of Radiology (L.S.H., J.M.H., J.R.M., T.W., J.L.).,H. Lee Moffitt Cancer Center and Research Institute (J.R.M.), Tampa, Florida
| | - T Wu
- From the Department of Radiology (L.S.H., J.M.H., J.R.M., T.W., J.L.).,Arizona State University (H.Y., Y.X., L.W., T.W., J.L.), Tempe, Arizona
| | - N L Tran
- Department of Cancer Biology (N.L.T.), Mayo Clinic in Arizona, Phoenix, Arizona
| | - K R Swanson
- Precision Neurotherapeutics Lab (A.J.H.-D., K.W.S., P.R.J, B.R.B., K.R.S.).,Department of Neurosurgery (B.J.A., B.R.B., R.S.Z., M.G.S., P.E.K., C.K., K.R.S.)
| | - J Li
- From the Department of Radiology (L.S.H., J.M.H., J.R.M., T.W., J.L.).,Arizona State University (H.Y., Y.X., L.W., T.W., J.L.), Tempe, Arizona
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28
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Grassini DR, Lagendijk AK, De Angelis JE, Da Silva J, Jeanes A, Zettler N, Bower NI, Hogan BM, Smith KA. Nppa and Nppb act redundantly during zebrafish cardiac development to confine AVC marker expression and reduce cardiac jelly volume. Development 2018; 145:dev.160739. [PMID: 29752386 DOI: 10.1242/dev.160739] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [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: 10/19/2017] [Accepted: 05/02/2018] [Indexed: 12/30/2022]
Abstract
Atrial natriuretic peptide (nppa/anf) and brain natriuretic peptide (nppb/bnp) form a gene cluster with expression in the chambers of the developing heart. Despite restricted expression, a function in cardiac development has not been demonstrated by mutant analysis. This is attributed to functional redundancy; however, their genomic location in cis has impeded formal analysis. Using genome editing, we have generated mutants for nppa and nppb, and found that single mutants were indistinguishable from wild type, whereas nppa/nppb double mutants displayed heart morphogenesis defects and pericardial oedema. Analysis of atrioventricular canal (AVC) markers show expansion of bmp4, tbx2b, has2 and versican expression into the atrium of double mutants. This expanded expression correlates with increased extracellular matrix in the atrium. Using a biosensor for hyaluronic acid to measure the cardiac jelly (cardiac extracellular matrix), we confirmed cardiac jelly expansion in nppa/nppb double mutants. Finally, bmp4 knockdown rescued the expansion of has2 expression and cardiac jelly in double mutants. This definitively shows that nppa and nppb function redundantly during cardiac development to restrict gene expression to the AVC, preventing excessive cardiac jelly synthesis in the atrial chamber.
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Affiliation(s)
- Daniela R Grassini
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Anne K Lagendijk
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jessica E De Angelis
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jason Da Silva
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Angela Jeanes
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Nicole Zettler
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Neil I Bower
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Benjamin M Hogan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Kelly A Smith
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
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29
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Barstead MG, Smith KA, Laursen B, Booth-LaForce C, King S, Rubin KH. Shyness, Preference for Solitude, and Adolescent Internalizing: The Roles of Maternal, Paternal, and Best-Friend Support. J Res Adolesc 2018; 28:488-504. [PMID: 29044733 DOI: 10.1111/jora.12350] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The researchers examined differential outcomes related to two distinct motivations for withdrawal (preference for solitude and shyness) as well as the possibility that support from important others (mothers, fathers, and best friends) attenuate any such links. Adolescents (159 males, 171 females) reported on their motivations to withdraw, internalizing symptoms, and relationship quality in eighth grade, as well as their anxiety and depression in ninth grade. Using structural equation modeling, the authors found that maternal support weakened the association between shyness and internalizing problems; friend support weakened the association between preference for solitude and depression; and friend support strengthened the association between shyness and depression. Results suggest that shy adolescents may not derive the same benefits from supportive friendships as their typical peers.
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30
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Lagendijk AK, Gomez GA, Baek S, Hesselson D, Hughes WE, Paterson S, Conway DE, Belting HG, Affolter M, Smith KA, Schwartz MA, Yap AS, Hogan BM. Live imaging molecular changes in junctional tension upon VE-cadherin in zebrafish. Nat Commun 2017; 8:1402. [PMID: 29123087 PMCID: PMC5680264 DOI: 10.1038/s41467-017-01325-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [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: 08/04/2016] [Accepted: 09/08/2017] [Indexed: 12/11/2022] Open
Abstract
Forces play diverse roles in vascular development, homeostasis and disease. VE-cadherin at endothelial cell-cell junctions links the contractile acto-myosin cytoskeletons of adjacent cells, serving as a tension-transducer. To explore tensile changes across VE-cadherin in live zebrafish, we tailored an optical biosensor approach, originally established in vitro. We validate localization and function of a VE-cadherin tension sensor (TS) in vivo. Changes in tension across VE-cadherin observed using ratio-metric or lifetime FRET measurements reflect acto-myosin contractility within endothelial cells. Furthermore, we apply the TS to reveal biologically relevant changes in VE-cadherin tension that occur as the dorsal aorta matures and upon genetic and chemical perturbations during embryonic development. Mechanical forces play a crucial role during morphogenesis, but how these are sensed and transduced in vivo is not fully understood. Here the authors apply a FRET tension sensor to live zebrafish and study changes in VE-cadherin tension at endothelial cell-cell junctions during arterial maturation.
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Affiliation(s)
- Anne Karine Lagendijk
- Institute for Molecular Bioscience, Genomics of Development and Disease division, The University of Queensland, 306 Carmody Road, St Lucia, 4072, QLD, Australia.
| | - Guillermo A Gomez
- Institute for Molecular Bioscience, Cell Biology and Molecular Medicine division, The University of Queensland, 306 Carmody Road, St Lucia, 4072, QLD, Australia.,Centre for Cancer Biology, SA Pathology and the University of South Australia, Frome Road, Adelaide, 5000, SA, Australia
| | - Sungmin Baek
- Institute for Molecular Bioscience, Genomics of Development and Disease division, The University of Queensland, 306 Carmody Road, St Lucia, 4072, QLD, Australia
| | - Daniel Hesselson
- Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, Sydney, 2010, NSW, Australia
| | - William E Hughes
- Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, Sydney, 2010, NSW, Australia
| | - Scott Paterson
- Institute for Molecular Bioscience, Genomics of Development and Disease division, The University of Queensland, 306 Carmody Road, St Lucia, 4072, QLD, Australia
| | - Daniel E Conway
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, 23284, USA
| | - Heinz-Georg Belting
- Biozentrum der Universität Basel, Klingelbergstrasse 70, 4056, Basel, Switzerland
| | - Markus Affolter
- Biozentrum der Universität Basel, Klingelbergstrasse 70, 4056, Basel, Switzerland
| | - Kelly A Smith
- Institute for Molecular Bioscience, Genomics of Development and Disease division, The University of Queensland, 306 Carmody Road, St Lucia, 4072, QLD, Australia
| | - Martin A Schwartz
- Yale Cardiovascular Research Center and Department of Internal Medicine, Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Alpha S Yap
- Institute for Molecular Bioscience, Cell Biology and Molecular Medicine division, The University of Queensland, 306 Carmody Road, St Lucia, 4072, QLD, Australia
| | - Benjamin M Hogan
- Institute for Molecular Bioscience, Genomics of Development and Disease division, The University of Queensland, 306 Carmody Road, St Lucia, 4072, QLD, Australia
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31
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De Angelis JE, Lagendijk AK, Chen H, Tromp A, Bower NI, Tunny KA, Brooks AJ, Bakkers J, Francois M, Yap AS, Simons C, Wicking C, Hogan BM, Smith KA. Tmem2 Regulates Embryonic Vegf Signaling by Controlling Hyaluronic Acid Turnover. Dev Cell 2017; 40:123-136. [PMID: 28118600 DOI: 10.1016/j.devcel.2016.12.017] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [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: 06/15/2015] [Revised: 10/18/2016] [Accepted: 12/16/2016] [Indexed: 11/28/2022]
Abstract
Angiogenesis is responsible for tissue vascularization during development, as well as in pathological contexts, including cancer and ischemia. Vascular endothelial growth factors (VEGFs) regulate angiogenesis by acting through VEGF receptors to induce endothelial cell signaling. VEGF is processed in the extracellular matrix (ECM), but the complexity of ECM control of VEGF signaling and angiogenesis remains far from understood. In a forward genetic screen, we identified angiogenesis defects in tmem2 zebrafish mutants that lack both arterial and venous Vegf/Vegfr/Erk signaling. Strikingly, tmem2 mutants display increased hyaluronic acid (HA) surrounding developing vessels. Angiogenesis in tmem2 mutants was rescued, or restored after failed sprouting, by degrading this increased HA. Furthermore, oligomerized HA or overexpression of Vegfc rescued angiogenesis in tmem2 mutants. Based on these data, and the known structure of Tmem2, we find that Tmem2 regulates HA turnover to promote normal Vegf signaling during developmental angiogenesis.
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Affiliation(s)
- Jessica E De Angelis
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Anne K Lagendijk
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Huijun Chen
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Alisha Tromp
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Neil I Bower
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Kathryn A Tunny
- Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Andrew J Brooks
- Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Jeroen Bakkers
- Department of Cardiac Development and Genetics, Hubrecht Institute, University Medical Centre Utrecht, Utrecht 3584 CT, the Netherlands; Department of Medical Physiology, University Medical Centre Utrecht, Utrecht 3584 EA, the Netherlands
| | - Mathias Francois
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Alpha S Yap
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Cas Simons
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Carol Wicking
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Benjamin M Hogan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Kelly A Smith
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia.
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32
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De Angelis JE, Lagendijk AK, Chen H, Tromp A, Bower NI, Tunny KA, Brooks AJ, Bakkers J, Francois M, Yap AS, Simons C, Wicking C, Hogan BM, Smith KA. Tmem2 Regulates Embryonic Vegf Signaling by Controlling Hyaluronic Acid Turnover. Dev Cell 2017; 40:421. [DOI: 10.1016/j.devcel.2017.02.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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33
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Capon SJ, Baillie GJ, Bower NI, da Silva JA, Paterson S, Hogan BM, Simons C, Smith KA. Utilising polymorphisms to achieve allele-specific genome editing in zebrafish. Biol Open 2017; 6:125-131. [PMID: 27895053 PMCID: PMC5278422 DOI: 10.1242/bio.020974] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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] [Indexed: 12/26/2022] Open
Abstract
The advent of genome editing has significantly altered genetic research, including research using the zebrafish model. To better understand the selectivity of the commonly used CRISPR/Cas9 system, we investigated single base pair mismatches in target sites and examined how they affect genome editing in the zebrafish model. Using two different zebrafish strains that have been deep sequenced, CRISPR/Cas9 target sites containing polymorphisms between the two strains were identified. These strains were crossed (creating heterozygotes at polymorphic sites) and CRISPR/Cas9 complexes that perfectly complement one strain injected. Sequencing of targeted sites showed biased, allele-specific editing for the perfectly complementary sequence in the majority of cases (14/19). To test utility, we examined whether phenotypes generated by F0 injection could be internally controlled with such polymorphisms. Targeting of genes bmp7a and chordin showed reduction in the frequency of phenotypes in injected ‘heterozygotes’ compared with injecting the strain with perfect complementarity. Next, injecting CRISPR/Cas9 complexes targeting two separate sites created deletions, but deletions were biased to selected chromosomes when one CRISPR/Cas9 target contained a polymorphism. Finally, integration of loxP sequences occurred preferentially in alleles with perfect complementarity. These experiments demonstrate that single nucleotide polymorphisms (SNPs) present throughout the genome can be utilised to increase the efficiency of in cis genome editing using CRISPR/Cas9 in the zebrafish model. Summary: Heterozygous single nucleotide polymorphisms in CRISPR/Cas9 target sites bias genome editing in favour of alleles with perfect complementarity to gRNAs, a feature which can be exploited for chromosome-specific editing.
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Affiliation(s)
- Samuel J Capon
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Gregory J Baillie
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Neil I Bower
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jason A da Silva
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Scott Paterson
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Benjamin M Hogan
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Cas Simons
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Kelly A Smith
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
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Smith KA, Barstead MG, Rubin KH. Neuroticism and Conscientiousness as Moderators of the Relation Between Social Withdrawal and Internalizing Problems in Adolescence. J Youth Adolesc 2016; 46:772-786. [PMID: 27844459 DOI: 10.1007/s10964-016-0594-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 07/29/2016] [Accepted: 10/17/2016] [Indexed: 11/29/2022]
Abstract
Social withdrawal, or refraining from social interaction in the presence of peers, places adolescents at risk of developing emotional problems like anxiety and depression. The personality traits of neuroticism and conscientiousness also relate to emotional difficulties. For example, high conscientiousness predicts lower incidence of anxiety disorders and depression, while high neuroticism relates to greater likelihood of these problems. Based on these associations, socially withdrawn adolescents high in conscientiousness or low in neuroticism were expected to have lower levels of anxiety and depressive symptoms. Participants included 103 adolescents (59 % female) who reported on their personality traits in 8th grade and their anxiety and depressive symptoms in 9th grade. Peer ratings of social withdrawal were collected within schools in 8th grade. A structural equation model revealed that 8th grade withdrawal positively predicted 9th grade anxiety and depressive symptoms controlling for 8th grade anxiety and depressive symptoms, but neuroticism did not. Conscientiousness moderated the relation of withdrawal with depressive symptoms but not anxiety, such that high levels of conscientiousness attenuated the association between withdrawal and depressive symptoms. This buffering effect may stem from the conceptual relation between conscientiousness and self-regulation. Conscientiousness did not, however, moderate the association between withdrawal and anxiety, which may be partly due to the role anxiety plays in driving withdrawal. Thus, a conscientious, well-regulated personality partially protects withdrawn adolescents from the increased risk of emotional difficulties.
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Affiliation(s)
- Kelly A Smith
- Department of Human Development and Quantitative Methodology, University of Maryland, 3304 Benjamin Building, 3942 Campus Drive, College Park, MD, 20742, USA.
| | - Matthew G Barstead
- Department of Human Development and Quantitative Methodology, University of Maryland, 3304 Benjamin Building, 3942 Campus Drive, College Park, MD, 20742, USA
| | - Kenneth H Rubin
- Department of Human Development and Quantitative Methodology, University of Maryland, 3304 Benjamin Building, 3942 Campus Drive, College Park, MD, 20742, USA
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Harvey LFB, Smith KA, Curlin H. Improving Operative Room Costs and Efficiency Through Review of Surgeon Preference Cards. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.097] [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: 10/20/2022]
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Pieniazek J, Smith KA, Williams MP, Manangi MK, Vazquez-Anon M, Solbak A, Miller M, Lee JT. Evaluation of increasing levels of a microbial phytase in phosphorus deficient broiler diets via live broiler performance, tibia bone ash, apparent metabolizable energy, and amino acid digestibility. Poult Sci 2016; 96:370-382. [PMID: 27444440 DOI: 10.3382/ps/pew225] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 02/08/2016] [Accepted: 05/09/2016] [Indexed: 11/20/2022] Open
Abstract
The objective was to investigate increasing concentrations of an evolved microbial phytase on male broiler performance, tibia bone ash, AME, and amino acid digestibility when fed diets deficient in available phosphorus (aP). Experiment 1 evaluated the effects of phytase during a 21 d battery cage study and Experiment 2 was a 42 d grow-out. Experiment 1 included six treatments; negative control (NC) with an aP level of 0.23% (starter) and 0.19% (grower), two positive controls (PC) consisting of an additional 0.12% and 0.22% aP (PC 1 and PC 2), and the NC supplemented with three levels of phytase (250, 500, and 2,000 U/kg). The NC diet reduced (P < 0.05) FC, BW, and bone ash. Phytase increased (P < 0.05) BW with 2,000 U/kg phytase yielding similar results to the PC2, and improved FCR and increased bone ash was observed at all phytase levels. Amino acid digestibility coefficients were increased (P < 0.05) with phytase at 250 U/kg. Phytase at all rates increased (P < 0.05) AME to levels similar level as PC diets. Linear regression analysis indicated average P equivalency values for BW and bone ash of 0.137, 0.147, and 0.226 for phytase inclusion of 250, 500, and 2000 U/kg, respectively. Experiment 2 included a PC consisting of 0.45%, 0.41%, and 0.38% aP for the starter, grower, and finisher, respectively; NC with reduced aP of 0.17%; and phytase at 500 and 2,000 U/kg. Phytase increased BW (P < 0.05) compared to the NC as 2,000 U/kg phytase resulted in further BW increases compared to the PC (starter and grower). Phytase improved FCR to levels comparable to the PC, with supplementation at 2,000 U/kg resulting in improvements beyond the PC in the starter phase. Amino acid digestibility coefficients were increased with phytase at 2,000 U/kg to levels comparable to that of the PC. These data confirm that the inclusion of phytase improves broiler performance and bone mineralization in aP reduced diets and levels beyond the traditional 500 U/kg can result in further improvements.
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Affiliation(s)
- J Pieniazek
- Poultry Science Department, Texas A&M AgriLife Research and Extension, Texas A&M System, College Station, TX, USA
| | - K A Smith
- Poultry Science Department, Texas A&M AgriLife Research and Extension, Texas A&M System, College Station, TX, USA
| | - M P Williams
- Poultry Science Department, Texas A&M AgriLife Research and Extension, Texas A&M System, College Station, TX, USA
| | | | | | - A Solbak
- Verenium Corporation, San Diego, CA
| | - M Miller
- Verenium Corporation, San Diego, CA
| | - J T Lee
- Poultry Science Department, Texas A&M AgriLife Research and Extension, Texas A&M System, College Station, TX, USA
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Abstract
OBJECTIVE The purpose of this pilot economic evaluation was to assess the cost-effectiveness of the endoscopic polypectomy in the clinic (EPIC) procedure compared to formal endoscopic sinus surgery (ESS) for the treatment of select chronic rhinosinusitis (CRS) patients with nasal polyposis. DESIGN Cost-effectiveness analysis using a Markov decision tree model with a 30-year time horizon. The two comparative treatment groups were as follows: (i) EPIC and (ii) ESS. Costs and effects were discounted at a rate of 3.5%. A probabilistic sensitivity analysis was performed. SETTING Economic perspective of the Canadian government third-party payer. PARTICIPANTS CRS patients with nasal polyposis who have predominantly isolated symptoms of nasal obstruction with or without olfactory loss. MAIN OUTCOME MEASURES Incremental cost per quality adjusted life year (QALY). RESULTS Over a time period of 30 years, the reference case demonstrated that the ESS strategy cost a total of $21,345 and produced 13.17 QALYs while the EPIC strategy cost a total of $5591 and produced 12.93 QALYs. The ESS versus EPIC incremental cost-effectiveness ratio was $65,641/QALY. The probability that EPIC is cost-effective compared to ESS at a maximum willingness-to-pay threshold of $30,000 and $50,000/QALY is 66% and 60%, respectively. CONCLUSIONS Outcomes from this study have demonstrated that the EPIC procedure may be a cost-effective treatment strategy for 'select' patients with nasal polyposis. Data from this study were obtained from a small pilot trial, and we feel the results warrant a future randomised controlled trial to strengthen the outcomes.
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Affiliation(s)
- L Rudmik
- Division of Otolaryngology - Head and Neck Surgery, Department of Surgery, University of Calgary, Calgary, AB, Canada.,Institute of Public Health (IPH), University of Calgary, Calgary, AB, Canada
| | - K A Smith
- Division of Otolaryngology - Head and Neck Surgery, Department of Surgery, University of Calgary, Calgary, AB, Canada
| | - S Kilty
- Department of Otolaryngology - Head and Neck Surgery, University of Ottawa, Ottawa, ON, Canada.,Ottawa Hospital Research Institute (OHRI), Ottawa, ON, Canada
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Nakano A, Nakano H, Smith KA, Palpant NJ. The developmental origins and lineage contributions of endocardial endothelium. Biochim Biophys Acta 2016; 1863:1937-47. [PMID: 26828773 DOI: 10.1016/j.bbamcr.2016.01.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 12/21/2015] [Accepted: 01/28/2016] [Indexed: 10/22/2022]
Abstract
Endocardial development involves a complex orchestration of cell fate decisions that coordinate with endoderm formation and other mesodermal cell lineages. Historically, investigations into the contribution of endocardium in the developing embryo was constrained to the heart where these cells give rise to the inner lining of the myocardium and are a major contributor to valve formation. In recent years, studies have continued to elucidate the complexities of endocardial fate commitment revealing a much broader scope of lineage potential from developing endocardium. These studies cover a wide range of species and model systems and show direct contribution or fate potential of endocardium giving rise to cardiac vasculature, blood, fibroblast, and cardiomyocyte lineages. This review focuses on the marked expansion of knowledge in the area of endocardial fate potential. This article is part of a Special Issue entitled: Cardiomyocyte Biology: Integration of Developmental and Environmental Cues in the Heart edited by Marcus Schaub and Hughes Abriel.
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Affiliation(s)
- Atsushi Nakano
- Department of Molecular Cell and Developmental Biology, Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California Los Angeles, Los Angeles, CA, USA
| | - Haruko Nakano
- Department of Molecular Cell and Developmental Biology, Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California Los Angeles, Los Angeles, CA, USA
| | - Kelly A Smith
- Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, Australia
| | - Nathan J Palpant
- Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, Australia.
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Salas AA, Smith KA, Rodgers MD, Phillips V, Ambalavanan N. Seasonal Variation in Solar Ultra Violet Radiation and Early Mortality in Extremely Preterm Infants. Am J Perinatol 2015; 32:1273-6. [PMID: 26039891 DOI: 10.1055/s-0035-1554797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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] [Indexed: 10/23/2022]
Abstract
BACKGROUND Vitamin D production during pregnancy promotes fetal lung development, a major determinant of infant survival after preterm birth. Because vitamin D synthesis in humans is regulated by solar ultraviolet B (UVB) radiation, we hypothesized that seasonal variation in solar UVB doses during fetal development would be associated with variation in neonatal mortality rates. METHODS This cohort study included infants born alive with gestational age (GA) between 23 and 28 weeks gestation admitted to a neonatal unit between 1996 and 2010. Three infant cohort groups were defined according to increasing intensities of solar UVB doses at 17 and 22 weeks gestation. The primary outcome was death during the first 28 days after birth. RESULTS Outcome data of 2,319 infants were analyzed. Mean birth weight was 830 ± 230 g and median gestational age was 26 weeks. Mortality rates were significantly different across groups (p = 0.04). High-intensity solar UVB doses were associated with lower mortality when compared with normal intensity solar UVB doses (hazard ratio: 0.70; 95% confidence interval: 0.54-0.91; p = 0.01). CONCLUSION High-intensity solar UVB doses during fetal development seem to be associated with risk reduction of early mortality in preterm infants. Prospective studies are needed to validate these preliminary findings.
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Affiliation(s)
- Ariel A Salas
- Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Kelly A Smith
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Mackenzie D Rodgers
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Vivien Phillips
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
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Koltowska K, Paterson S, Bower NI, Baillie GJ, Lagendijk AK, Astin JW, Chen H, Francois M, Crosier PS, Taft RJ, Simons C, Smith KA, Hogan BM. mafba is a downstream transcriptional effector of Vegfc signaling essential for embryonic lymphangiogenesis in zebrafish. Genes Dev 2015; 29:1618-30. [PMID: 26253536 PMCID: PMC4536310 DOI: 10.1101/gad.263210.115] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [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] [Indexed: 11/24/2022]
Abstract
Koltowska et al. used a forward genetic screen in zebrafish to identify the transcription factor mafba as essential for lymphatic vessel development. Vegfc signaling increases mafba expression to control downstream transcription, and this relationship is SoxF transcription factor-dependent. The lymphatic vasculature plays roles in tissue fluid balance, immune cell trafficking, fatty acid absorption, cancer metastasis, and cardiovascular disease. Lymphatic vessels form by lymphangiogenesis, the sprouting of new lymphatics from pre-existing vessels, in both development and disease contexts. The apical signaling pathway in lymphangiogenesis is the VEGFC/VEGFR3 pathway, yet how signaling controls cellular transcriptional output remains unknown. We used a forward genetic screen in zebrafish to identify the transcription factor mafba as essential for lymphatic vessel development. We found that mafba is required for the migration of lymphatic precursors after their initial sprouting from the posterior cardinal vein. mafba expression is enriched in sprouts emerging from veins, and we show that mafba functions cell-autonomously during lymphatic vessel development. Mechanistically, Vegfc signaling increases mafba expression to control downstream transcription, and this regulatory relationship is dependent on the activity of SoxF transcription factors, which are essential for mafba expression in venous endothelium. Here we identify an indispensable Vegfc–SoxF–Mafba pathway in lymphatic development.
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Affiliation(s)
- Katarzyna Koltowska
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Scott Paterson
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Neil I Bower
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Gregory J Baillie
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Anne K Lagendijk
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Jonathan W Astin
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland 1023, New Zealand
| | - Huijun Chen
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Mathias Francois
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Philip S Crosier
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland 1023, New Zealand
| | - Ryan J Taft
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Cas Simons
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Kelly A Smith
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Benjamin M Hogan
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
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Abstract
OBJECTIVES The aim of the study was to assess both the safety and the effectiveness of nitrofurantoin in male veterans treated for urinary tract infections (UTIs) with varying degrees of renal impairment in the outpatient setting. Nitrofurantoin is an important oral option for treating UTIs given increasing resistance to commonly used agents. Nitrofurantoin is currently contraindicated in patients with a creatinine clearance (CrCl) of < 60 ml/min, but the reason for this threshold has not been well documented. METHODS Data were collected through a retrospective chart review from January 2004 to July 2013 of men who had received nitrofurantoin. Bivariate analyses followed by multivariate analyses were performed between patients experiencing clinical cure and those who did not, to determine factors significantly impacting effectiveness. RESULTS The Gram stain of the organism causing the UTI and CrCl were significant factors impacting effectiveness. For every 1 ml/min increase in CrCl, the odds of clinical cure increased by 1.3%. Patients with Gram-negative UTIs predictably had 80% cure rates with CrCl around 60 ml/min. Patients with Gram-positive UTIs required higher CrCl, nearing 100 ml/min, to establish an 80% cure rate. Adverse effects did not vary with CrCl. CONCLUSIONS The odds of clinical cure varied with CrCl and with the type of organism causing the UTI, while adverse events did not differ based on renal function. A minimum CrCl of 60 ml/min is suggested for men to achieve an 80% cure rate for UTIs with the most common urinary pathogens.
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Affiliation(s)
- Michelle L Ingalsbe
- Department of Pharmacy, VA Western New York Healthcare System, Buffalo, NY, USA
| | - Amy L Wojciechowski
- Department of Pharmacy Practice, D'Youville College School of Pharmacy, Buffalo, NY, USA
| | - Kelly A Smith
- Department of Pharmacy, VA Western New York Healthcare System, Buffalo, NY, USA
| | - Kari A Mergenhagen
- Infectious Diseases Clinical Pharmacist, Department of Pharmacy - 119, VA Western New York Healthcare System, 3495 Bailey Avenue, Buffalo, NY 14215, USA
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Coxam B, Neyt C, Grassini DR, Le Guen L, Smith KA, Schulte-Merker S, Hogan BM. carbamoyl-phosphate synthetase 2, aspartate transcarbamylase, and dihydroorotase (cad) regulates Notch signaling and vascular development in zebrafish. Dev Dyn 2014; 244:1-9. [PMID: 25294789 DOI: 10.1002/dvdy.24209] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 09/19/2014] [Accepted: 09/22/2014] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The interplay between Notch and Vegf signaling regulates angiogenesis in the embryo. Notch signaling limits the responsiveness of endothelial cells to Vegf to control sprouting. Despite the importance of this regulatory relationship, much remains to be understood about extrinsic factors that modulate the pathway. RESULTS During a forward genetic screen for novel regulators of lymphangiogenesis, we isolated a mutant with reduced lymphatic vessel development. This mutant also exhibited hyperbranching arteries, reminiscent of Notch pathway mutants. Positional cloning identified a missense mutation in the carbamoyl-phosphate synthetase 2, aspartate transcarbamylase, and dihydroorotase (cad) gene. Cad is essential for UDP biosynthesis, which is necessary for protein glycosylation and de novo biosynthesis of pyrimidine-based nucleotides. Using a transgenic reporter of Notch activity, we demonstrate that Notch signaling is significantly reduced in cad(hu10125) mutants. In this context, genetic epistasis showed that increased endothelial cell responsiveness to Vegfc/Vegfr3 signaling drives excessive artery branching. CONCLUSIONS These findings suggest important posttranslational modifications requiring Cad as an unappreciated mechanism that regulates Notch/Vegf signaling during angiogenesis.
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Affiliation(s)
- Baptiste Coxam
- Division of Molecular Genetics and Development, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
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Coxam B, Sabine A, Bower NI, Smith KA, Pichol-Thievend C, Skoczylas R, Astin JW, Frampton E, Jaquet M, Crosier PS, Parton RG, Harvey NL, Petrova TV, Schulte-Merker S, Francois M, Hogan BM. Pkd1 regulates lymphatic vascular morphogenesis during development. Cell Rep 2014; 7:623-33. [PMID: 24767999 DOI: 10.1016/j.celrep.2014.03.063] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [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: 07/22/2013] [Revised: 02/13/2014] [Accepted: 03/26/2014] [Indexed: 01/21/2023] Open
Abstract
Lymphatic vessels arise during development through sprouting of precursor cells from veins, which is regulated by known signaling and transcriptional mechanisms. The ongoing elaboration of vessels to form a network is less well understood. This involves cell polarization, coordinated migration, adhesion, mixing, regression, and shape rearrangements. We identified a zebrafish mutant, lymphatic and cardiac defects 1 (lyc1), with reduced lymphatic vessel development. A mutation in polycystic kidney disease 1a was responsible for the phenotype. PKD1 is the most frequently mutated gene in autosomal dominant polycystic kidney disease (ADPKD). Initial lymphatic precursor sprouting is normal in lyc1 mutants, but ongoing migration fails. Loss of Pkd1 in mice has no effect on precursor sprouting but leads to failed morphogenesis of the subcutaneous lymphatic network. Individual lymphatic endothelial cells display defective polarity, elongation, and adherens junctions. This work identifies a highly selective and unexpected role for Pkd1 in lymphatic vessel morphogenesis during development.
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Affiliation(s)
- Baptiste Coxam
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Amélie Sabine
- Department of Oncology, University Hospital of Lausanne, and Department of Biochemistry, University of Lausanne, 1066 Epalinges, Switzerland
| | - Neil I Bower
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Kelly A Smith
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Cathy Pichol-Thievend
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Renae Skoczylas
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Jonathan W Astin
- Department of Molecular Medicine and Pathology, School of Medical Sciences, The University of Auckland, 1142 Auckland, New Zealand
| | - Emmanuelle Frampton
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Muriel Jaquet
- Department of Oncology, University Hospital of Lausanne, and Department of Biochemistry, University of Lausanne, 1066 Epalinges, Switzerland
| | - Philip S Crosier
- Department of Molecular Medicine and Pathology, School of Medical Sciences, The University of Auckland, 1142 Auckland, New Zealand
| | - Robert G Parton
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Natasha L Harvey
- Division of Haematology, Centre for Cancer Biology, SA Pathology, Adelaide, SA 5000, Australia
| | - Tatiana V Petrova
- Department of Oncology, University Hospital of Lausanne, and Department of Biochemistry, University of Lausanne, 1066 Epalinges, Switzerland
| | | | - Mathias Francois
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Benjamin M Hogan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia.
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Agnew S, Gray L, Blocker L, Ryan CE, Smith KA. Experiencing the Electronic Resources and Libraries Conference. Serials Review 2013. [DOI: 10.1080/00987913.2006.10765060] [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: 10/25/2022]
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Kartopawiro J, Bower NI, Karnezis T, Kazenwadel J, Betterman KL, Lesieur E, Koltowska K, Astin J, Crosier P, Vermeren S, Achen MG, Stacker SA, Smith KA, Harvey NL, François M, Hogan BM. Arap3 is dysregulated in a mouse model of hypotrichosis–lymphedema–telangiectasia and regulates lymphatic vascular development. Hum Mol Genet 2013; 23:1286-97. [DOI: 10.1093/hmg/ddt518] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mellor DD, Madden LA, Smith KA, Kilpatrick ES, Atkin SL. High-polyphenol chocolate reduces endothelial dysfunction and oxidative stress during acute transient hyperglycaemia in Type 2 diabetes: a pilot randomized controlled trial. Diabet Med 2013; 30:478-83. [PMID: 23039340 DOI: 10.1111/dme.12030] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 08/24/2012] [Accepted: 10/01/2012] [Indexed: 02/05/2023]
Abstract
AIMS To investigate the effects of high-polyphenol chocolate upon endothelial function and oxidative stress in Type 2 diabetes mellitus during acute transient hyperglycaemia induced following a 75-g oral glucose challenge. METHODS Ten subjects with Type 2 diabetes underwent a double-blinded randomized controlled crossover study. A 75-g oral glucose load was used to induce hyperglycaemia, which was administered to participants 60 min after they had ingested either low (control) or high-polyphenol chocolate. Participants undertook testing at weekly intervals, following an initial cocoa-free period. Endothelial function was assessed by both functional [reactive hyperaemia peripheral artery tonometry (EndoPAT-2000) and serum markers (including intercellular adhesion molecule 1, P-selectin and P-selectin glycoprotein ligand 1]. Urinary 15-F2t-isoprostane adjusted for creatinine was used as an oxidative stress marker. Measurements were made at baseline and 2 h post-ingestion of the glucose load. RESULTS Prior consumption of high-polyphenol chocolate before a glucose load improved endothelial function (1.7 ± 0.1 vs. 2.3 ± 0.1%, P = 0.01), whereas prior consumption of control chocolate resulted in a significant increase in intercellular adhesion molecule 1 (321.1 ± 7.6 vs. 373.6 ± 10.5 ng/ml, P = 0.04) and 15-F2t-isoprostane (116.8 ± 5.7 vs. 207.1 ± 5.7 mg/mol, P = 0.02). Analysis of percentage changes from baseline comparing control and high-polyphenol chocolate showed a significant improvement for high-polyphenol chocolate in both measures of endothelial function (P < 0.05) and for urinary 15-F2t-isoprostane (P = 0.04). CONCLUSION High-polyphenol chocolate protected against acute hyperglycaemia-induced endothelial dysfunction and oxidative stress in individuals with Type 2 diabetes mellitus.
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Affiliation(s)
- D D Mellor
- Department of Clinical Science, University of Chester, Chester, UK.
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Wakil A, Smith KA, Atkin SL, Kilpatrick ES. Short-term glucose variability in healthy volunteers is not associated with raised oxidative stress markers. Diabetes Obes Metab 2012; 14:1047-9. [PMID: 22587382 DOI: 10.1111/j.1463-1326.2012.01625.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Revised: 01/18/2012] [Accepted: 05/09/2012] [Indexed: 12/01/2022]
Abstract
It is unknown whether glycaemic variability adds to the risk of microvascular complications of diabetes over and above the mean glucose value for a patient. We examined the effect of purposefully induced short-term glycaemic variability on oxidative stress markers. Eleven healthy subjects underwent three sequential glycaemic states; sustained hyperglycaemia, sustained euglycaemia and variable glycaemia, using glycaemic clamps for 3 h. Twenty-four hours urinary 8-isoprostane-PGF2α was measured before and after each glycaemic state to assess oxidative stress. The median and interquartile range of the urinary 8-iso-PGF2α in ng/24 h were (1373, 513), (996, 298) and (1227, 472) for the euglycaemic, hyperglycaemic and variable states, respectively. There was no significant difference in urinary isoprostanes between the three different states; mean ranks 20.9, 11.9 and 18.2 for the euglycaemic state, hyperglycaemic state and glycaemic variability state, respectively, p = 0.083. In conclusion, we did not see a significant increase in the urinary isoprostanes when glycaemic variability was induced under controlled conditions in healthy individuals.
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Hooper JMW, Stuijver DJF, Orme SM, van Zaane B, Hess K, Gerdes VE, Phoenix F, Rice P, Smith KA, Alzahrani SH, Standeven KF, Ajjan RA. Thyroid dysfunction and fibrin network structure: a mechanism for increased thrombotic risk in hyperthyroid individuals. J Clin Endocrinol Metab 2012; 97:1463-73. [PMID: 22378816 DOI: 10.1210/jc.2011-2894] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Hyperthyroidism is associated with increased thrombosis risk, and fibrin clot structure determines susceptibility to vascular thrombotic events. OBJECTIVE Our objective was to investigate clot formation and lysis in hyperthyroidism using observational and interventional studies. DESIGN Ex vivo fibrin clot structure/fibrinolysis and plasma levels of thrombotic/inflammatory markers were investigated in hyperthyroid individuals (n = 24) and matched controls (n = 19), using turbidimetric assays, ELISA, and confocal and electron microscopy. The effects of normalizing thyroid function were analyzed (n = 19) and the role of short-term exogenous hyperthyroidism in healthy volunteers studied (n = 16). RESULTS Hyperthyroid subjects displayed higher clot maximum absorbance compared with controls (0.41 ± 0.03 and 0.27 ± 0.01 arbitrary units, respectively; P < 0.01), and longer clot lysis time (518 ± 23 and 461 ± 18 sec, respectively; P < 0.05), which correlated with free T(4) levels. Plasma levels of fibrinogen and plasminogen activator inhibitor-1 were significantly higher in patients compared with controls. Normalizing thyroid function in 19 subjects was associated with lower maximum absorbance and shorter lysis time, accompanied by reduction in fibrinogen, plasminogen activator inhibitor-1, and D-dimer levels. Complement C3, but not C-reactive protein, levels were higher in hyperthyroid subjects compared with controls (0.92 ± 0.05 and 0.64 ± 0.03 g/liter, respectively; P < 0.01), correlated with clot structure parameters, and decreased after intervention. Confocal and electron microscopy confirmed more compact clots and impaired fibrinolysis during hyperthyroidism. Exogenous hyperthyroidism in healthy volunteers had no effect on any of the clot structure parameters. CONCLUSIONS Endogenous hyperthyroidism is associated with more compact clots and resistance to fibrinolysis ex vivo, related to the degree of hyperthyroidism and C3 plasma levels, and these changes are modulated by achieving euthyroidism. Altered clot structure/lysis may be one mechanism for increased thrombotic risk in hyperthyroidism.
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Affiliation(s)
- J M W Hooper
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds LS2 9JT, United Kingdom
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Hess K, Alzahrani SH, Mathai M, Schroeder V, Carter AM, Howell G, Koko T, Strachan MWJ, Price JF, Smith KA, Grant PJ, Ajjan RA. A novel mechanism for hypofibrinolysis in diabetes: the role of complement C3. Diabetologia 2012; 55:1103-13. [PMID: 21918806 DOI: 10.1007/s00125-011-2301-7] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 08/12/2011] [Indexed: 12/14/2022]
Abstract
AIMS/HYPOTHESIS Impaired fibrin clot lysis is a key abnormality in diabetes and complement C3 is one protein identified in blood clots. This work investigates the mechanistic pathways linking C3 and hypofibrinolysis in diabetes using ex vivo/in vitro studies. METHODS Fibrinolysis and C3 plasma levels were determined in type 1 diabetic patients and healthy controls, and the effects of glycaemia investigated. C3 incorporation into fibrin clots and modulation of fibrinolysis were analysed by ELISA, immunoblotting, turbidimetric assays and electron and confocal microscopy. RESULTS Clot lysis time was longer in diabetic children than in controls (599 ± 18 and 516 ± 12 s respectively; p < 0.01), C3 levels were higher in diabetic children (0.55 ± 0.02 and 0.43 ± 0.02 g/l respectively; p < 0.01) and both were affected by improving glycaemia. An interaction between C3 and fibrin was confirmed by the presence of lower protein levels in sera compared with corresponding plasma and C3 detection in plasma clots by immunoblot. In a purified system, C3 was associated with thinner fibrin fibres and more prolongation of lysis time of clots made from fibrinogen from diabetic participants compared with controls (244 ± 64 and 92 ± 23 s respectively; p < 0.05). Confocal microscopy showed higher C3 incorporation into diabetic clots compared with controls, and fully formed clot lysis was prolonged by 764 ± 76 and 428 ± 105 s respectively (p < 0.05). Differences in lysis, comparing diabetes and controls, were not related to altered plasmin generation or C3-fibrinogen binding assessed by plasmon resonance. CONCLUSIONS/INTERPRETATION C3 incorporation into clots from diabetic fibrinogen is enhanced and adversely affects fibrinolysis. This may be one novel mechanism for compromised clot lysis in diabetes, potentially offering a new therapeutic target.
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Affiliation(s)
- K Hess
- University of Leeds, Leeds, UK
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Hu LS, Eschbacher JM, Dueck AC, Heiserman JE, Liu S, Karis JP, Smith KA, Shapiro WR, Pinnaduwage DS, Coons SW, Nakaji P, Debbins J, Feuerstein BG, Baxter LC. Correlations between perfusion MR imaging cerebral blood volume, microvessel quantification, and clinical outcome using stereotactic analysis in recurrent high-grade glioma. AJNR Am J Neuroradiol 2012; 33:69-76. [PMID: 22095961 PMCID: PMC7966183 DOI: 10.3174/ajnr.a2743] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [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: 12/30/2010] [Accepted: 05/09/2011] [Indexed: 01/14/2023]
Abstract
BACKGROUND AND PURPOSE Quantifying MVA rather than MVD provides better correlation with survival in HGG. This is attributed to a specific "glomeruloid" vascular pattern, which is better characterized by vessel area than number. Despite its prognostic value, MVA quantification is laborious and clinically impractical. The DSC-MR imaging measure of rCBV offers the advantages of speed and convenience to overcome these limitations; however, clinical use of this technique depends on establishing accurate correlations between rCBV, MVA, and MVD, particularly in the setting of heterogeneous vascular size inherent to human HGG. MATERIALS AND METHODS We obtained preoperative 3T DSC-MR imaging in patients with HGG before stereotactic surgery. We histologically quantified MVA, MVD, and vascular size heterogeneity from CD34-stained 10-μm sections of stereotactic biopsies, and we coregistered biopsy locations with localized rCBV measurements. We statistically correlated rCBV, MVA, and MVD under conditions of high and low vascular-size heterogeneity and among tumor grades. We correlated all parameters with OS by using Cox regression. RESULTS We analyzed 38 biopsies from 24 subjects. rCBV correlated strongly with MVA (r = 0.83, P < .0001) but weakly with MVD (r = 0.32, P = .05), due to microvessel size heterogeneity. Among samples with more homogeneous vessel size, rCBV correlation with MVD improved (r = 0.56, P = .01). OS correlated with both rCBV (P = .02) and MVA (P = .01) but not with MVD (P = .17). CONCLUSIONS rCBV provides a reliable estimation of tumor MVA as a biomarker of glioma outcome. rCBV poorly estimates MVD in the presence of vessel size heterogeneity inherent to human HGG.
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Affiliation(s)
- L S Hu
- Department of Radiology, Mayo Clinic, Phoenix/Scottsdale, Arizona, USA.
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