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Panchagnula K, Graf D, Albertani FEA, Thom AJW. Translational eigenstates of He@C60 from four-dimensional ab initio potential energy surfaces interpolated using Gaussian process regression. J Chem Phys 2024; 160:104303. [PMID: 38465682 DOI: 10.1063/5.0197903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 02/22/2024] [Indexed: 03/12/2024] Open
Abstract
We investigate the endofullerene system 3He@C60 with a four-dimensional potential energy surface (PES) to include the three He translational degrees of freedom and C60 cage radius. We compare second order Møller-Plesset perturbation theory (MP2), spin component scaled-MP2, scaled opposite spin-MP2, random phase approximation (RPA)@Perdew, Burke, and Ernzerhof (PBE), and corrected Hartree-Fock-RPA to calibrate and gain confidence in the choice of electronic structure method. Due to the high cost of these calculations, the PES is interpolated using Gaussian Process Regression (GPR), owing to its effectiveness with sparse training data. The PES is split into a two-dimensional radial surface, to which corrections are applied to achieve an overall four-dimensional surface. The nuclear Hamiltonian is diagonalized to generate the in-cage translational/vibrational eigenstates. The degeneracy of the three-dimensional harmonic oscillator energies with principal quantum number n is lifted due to the anharmonicity in the radial potential. The (2l + 1)-fold degeneracy of the angular momentum states is also weakly lifted, due to the angular dependence in the potential. We calculate the fundamental frequency to range between 96 and 110 cm-1 depending on the electronic structure method used. Error bars of the eigenstate energies were calculated from the GPR and are on the order of ∼±1.5 cm-1. Wavefunctions are also compared by considering their overlap and Hellinger distance to the one-dimensional empirical potential. As with the energies, the two ab initio methods MP2 and RPA@PBE show the best agreement. While MP2 has better agreement than RPA@PBE, due to its higher computational efficiency and comparable performance, we recommend RPA as an alternative electronic structure method of choice to MP2 for these systems.
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Affiliation(s)
- K Panchagnula
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
| | - D Graf
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
| | - F E A Albertani
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
| | - A J W Thom
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
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2
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Graf D, Gschwenter S, Kuzdas-Sallaberger M, Reiger G, Edlmayer A, Felder D, Klausberger H, Wagner K, Skoumal M. Effects of an inpatient rehabilitation programme on functional capacity, quality of life and psychological distress in patients with post covid-19 condition: an observational study. J Rehabil Med 2023; 55:jrm12437. [PMID: 37953513 PMCID: PMC10647930 DOI: 10.2340/jrm.v55.12437] [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: 05/09/2023] [Accepted: 10/05/2023] [Indexed: 11/14/2023] Open
Abstract
OBJECTIVES To examine changes in functional capacity, health-related quality of life and psychological distress in patients with post-COVID-19 condition following a multidisciplinary rehabilitation programme. In addition, to explore whether additional respiratory muscle training for more impaired patients might support their recovery process. DESIGN Retrospective observational cohort study. PATIENTS A total of 779 patients with post-COVID-19 condition (47.9% female, mean age 56.6 years). METHODS Measures assessed were: 6-minute walk test (6MWT), 5-level EQ-5D (EQ-5D-5L) including EQ Visual Analogue Scale (EQ-VAS) and Patient Health Questionnaire-4 (PHQ-4). Data were provided pre- and post-rehabilitation from 2 cohorts: (i) patients participating in a regular multidisciplinary rehabilitation programme; and (ii) patients receiving additional respiratory muscle training due to an initially greater level of impairment. Dependent t-tests and general linear mixed models were used for data analysis. RESULTS A series of dependent t-tests revealed mean overall improvement for both groups in 6-minute walk test distance (6MWD), EQ-5D-5L index, EQ-VAS and PHQ-4 following the rehabilitation programme. General linear mixed models showed significant interaction effects between groups and time for the EQ-5D-5L index and 6MWD. CONCLUSION A multidisciplinary rehabilitation programme appears to have a beneficial impact on the recovery process of patients with post-COVID-19 condition.
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Affiliation(s)
- Daniel Graf
- Department for Research, Innovation and Medical Service Development – Applied Rehabilitation Research, Pension Insurance Institution, Vienna, Austria; University of Turku, Turku, Finland
| | - Stefan Gschwenter
- Department for Research, Innovation and Medical Service Development – Applied Rehabilitation Research, Pension Insurance Institution, Vienna, Austria.
| | - Marina Kuzdas-Sallaberger
- Department for Research, Innovation and Medical Service Development – Applied Rehabilitation Research, Pension Insurance Institution, Vienna, Austria
| | - Gabriele Reiger
- Rehabilitation Clinic Weyer, Pension Insurance Institution, Weyer, Austria
| | - Alexandra Edlmayer
- Department for Research, Innovation and Medical Service Development – Applied Rehabilitation Research, Pension Insurance Institution, Vienna, Austria
| | - David Felder
- Department for Research, Innovation and Medical Service Development – Applied Rehabilitation Research, Pension Insurance Institution, Vienna, Austria
| | | | - Katharina Wagner
- Rehabilitation Clinic Weyer, Pension Insurance Institution, Weyer, Austria
| | - Martin Skoumal
- Main Office, Pension Insurance Institution, Vienna, Austria
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3
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Graf D, Thom AJW. Corrected density functional theory and the random phase approximation: Improved accuracy at little extra cost. J Chem Phys 2023; 159:174106. [PMID: 37921249 DOI: 10.1063/5.0168569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/16/2023] [Indexed: 11/04/2023] Open
Abstract
We recently introduced an efficient methodology to perform density-corrected Hartree-Fock density functional theory [DC(HF)-DFT] calculations and an extension to it we called "corrected" HF DFT [C(HF)-DFT] [Graf and Thom, J. Chem. Theory Comput. 19 5427-5438 (2023)]. In this work, we take a further step and combine C(HF)-DFT, augmented with a straightforward orbital energy correction, with the random phase approximation (RPA). We refer to the resulting methodology as corrected HF RPA [C(HF)-RPA]. We evaluate the proposed methodology across various RPA methods: direct RPA (dRPA), RPA with an approximate exchange kernel, and RPA with second-order screened exchange. C(HF)-dRPA demonstrates very promising performance; for RPA with exchange methods, on the other hand, we often find over-corrections.
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Affiliation(s)
- Daniel Graf
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, England
| | - Alex J W Thom
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, England
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Grimbly C, Graf D, Ward LM, Alexander RT. X-linked hypophosphatemia, fibroblast growth factor 23 signaling, and craniosynostosis. Exp Biol Med (Maywood) 2023; 248:2175-2182. [PMID: 38230523 PMCID: PMC10800125 DOI: 10.1177/15353702231222023] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024] Open
Abstract
This review summarizes the current knowledge of fibroblast growth factor 23 signaling in bone and its role in the disease pathology of X-linked hypophosphatemia. Craniosynostosis is an under-recognized complication of X-linked hypophosphatemia. The clinical implications and potential cellular mechanisms invoked by increased fibroblast growth factor 23 signaling causing craniosynostosis are reviewed. Knowledge gaps are identified and provide direction for future clinical and basic science studies.
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Affiliation(s)
- Chelsey Grimbly
- Department of Pediatrics, Edmonton Clinic Health Academy, University of Alberta, Edmonton, AB T6G 2R7, Canada
- Women & Children’s Health Research Institute, University of Alberta, Edmonton, AB T6G 2R7, Canada
| | - Daniel Graf
- Women & Children’s Health Research Institute, University of Alberta, Edmonton, AB T6G 2R7, Canada
- Department of Dentistry and Dental Hygiene, University of Alberta, Edmonton, AB T6G 2R7, Canada
| | - Leanne M Ward
- Division of Endocrinology and Metabolism, Department of Pediatrics Faculty of Medicine, Children’s Hospital of Eastern Ontario, University of Ottawa, Ottawa, ON K1H 8L1, Canada
| | - R Todd Alexander
- Department of Pediatrics, Edmonton Clinic Health Academy, University of Alberta, Edmonton, AB T6G 2R7, Canada
- Women & Children’s Health Research Institute, University of Alberta, Edmonton, AB T6G 2R7, Canada
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5
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Xia XD, Gill G, Lin H, Roth DM, Gu HM, Wang XJ, Su FY, Alabi A, Alexiou M, Zhang Z, Wang GQ, Graf D, Zhang DW. Global, but not chondrocyte-specific, MT1-MMP deficiency in adult mice causes inflammatory arthritis. Matrix Biol 2023; 122:10-17. [PMID: 37598898 DOI: 10.1016/j.matbio.2023.08.003] [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] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 08/17/2023] [Accepted: 08/17/2023] [Indexed: 08/22/2023]
Abstract
Membrane-type I metalloproteinase (MT1-MMP/MMP14) plays a key role in various pathophysiological processes, indicating an unaddressed need for a targeted therapeutic approach. However, mice genetically deficient in Mmp14 show severe defects in development and growth. To investigate the possibility of MT1-MMP inhibition as a safe treatment in adults, we generated global Mmp14 tamoxifen-induced conditional knockout (Mmp14kd) mice and found that MT1-MMP deficiency in adult mice resulted in severe inflammatory arthritis. Mmp14kd mice started to show noticeably swollen joints two weeks after tamoxifen administration, which progressed rapidly. Mmp14kd mice reached a humane endpoint 6 to 8 weeks after tamoxifen administration due to severe arthritis. Plasma TNF-α levels were also significantly increased in Mmp14kd mice. Detailed analysis revealed chondrocyte hypertrophy, synovial fibrosis, and subchondral bone remodeling in the joints of Mmp14kd mice. However, global conditional knockout of MT1-MMP in adult mice did not affect body weight, blood glucose, or plasma cholesterol and triglyceride levels. Furthermore, we observed substantial expression of MT1-MMP in the articular cartilage of patients with osteoarthritis. We then developed chondrocyte-specific Mmp14 tamoxifen-induced conditional knockout (Mmp14chkd) mice. Chondrocyte MT1-MMP deficiency in adult mice also caused apparent chondrocyte hypertrophy. However, Mmp14chkd mice did not exhibit synovial hyperplasia or noticeable arthritis, suggesting that chondrocyte MT1-MMP is not solely responsible for the onset of severe arthritis observed in Mmp14kd mice. Our findings also suggest that highly cell-type specific inhibition of MT1-MMP is required for its potential therapeutic use.
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Affiliation(s)
- Xiao-Dan Xia
- Department of Orthopedics, the Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, Guangdong, China; Department of Pediatrics, Group on the Molecular and Cell Biology of Lipids, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Govind Gill
- Department of Pediatrics, Group on the Molecular and Cell Biology of Lipids, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Haiming Lin
- Department of Dentistry & Dental Hygiene, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; Department of Orthopaedics, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China
| | - Daniela M Roth
- Department of Dentistry & Dental Hygiene, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Hong-Mei Gu
- Department of Pediatrics, Group on the Molecular and Cell Biology of Lipids, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Xiang-Jiang Wang
- Department of Orthopedics, the Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, Guangdong, China
| | - Feng-Yi Su
- Department of Orthopedics, the Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, Guangdong, China
| | - Adekunle Alabi
- Department of Pediatrics, Group on the Molecular and Cell Biology of Lipids, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Maria Alexiou
- Department of Dentistry & Dental Hygiene, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Ziyang Zhang
- Department of Pediatrics, Group on the Molecular and Cell Biology of Lipids, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Gui-Qing Wang
- Department of Orthopedics, the Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, Guangdong, China.
| | - Daniel Graf
- Department of Dentistry & Dental Hygiene, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
| | - Da-Wei Zhang
- Department of Pediatrics, Group on the Molecular and Cell Biology of Lipids, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
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Graf D, Thom AJW. Simple and Efficient Route toward Improved Energetics within the Framework of Density-Corrected Density Functional Theory. J Chem Theory Comput 2023; 19:5427-5438. [PMID: 37525457 PMCID: PMC10448722 DOI: 10.1021/acs.jctc.3c00441] [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] [Received: 04/23/2023] [Indexed: 08/02/2023]
Abstract
The crucial step in density-corrected Hartree-Fock density functional theory (DC(HF)-DFT) is to decide whether the density produced by the density functional for a specific calculation is erroneous and, hence, should be replaced by, in this case, the HF density. We introduce an indicator, based on the difference in noninteracting kinetic energies between DFT and HF calculations, to determine when the HF density is the better option. Our kinetic energy indicator directly compares the self-consistent density of the analyzed functional with the HF density, is size-intensive, reliable, and most importantly highly efficient. Moreover, we present a procedure that makes best use of the computed quantities necessary for DC(HF)-DFT by additionally evaluating a related hybrid functional and, in that way, not only "corrects" the density but also the functional itself; we call that procedure corrected Hartree-Fock density functional theory (C(HF)-DFT).
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Affiliation(s)
- Daniel Graf
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
| | - Alex J. W. Thom
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
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7
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Noble RMN, Holody CD, Woodman AG, Nie C, Liu SN, Young D, Wiedemeyer A, Soni S, Dyck JRB, Graf D, Eckersley LG, Dufour A, Bourque SL. Perinatal iron restriction is associated with changes in neonatal cardiac function and structure in a sex-dependent manner. Clin Sci (Lond) 2023; 137:1115-1130. [PMID: 37463130 DOI: 10.1042/cs20230594] [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] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 07/20/2023]
Abstract
Iron deficiency (ID) is common during gestation and in early infancy and can alter developmental trajectories with lasting consequences on cardiovascular health. While the effects of ID and anemia on the mature heart are well documented, comparatively little is known about their effects and mechanisms on offspring cardiac development and function in the neonatal period. Female Sprague-Dawley rats were fed an iron-restricted or iron-replete diet before and during pregnancy. Cardiac function was assessed in a cohort of offspring on postnatal days (PD) 4, 14, and 28 by echocardiography; a separate cohort was euthanized for tissue collection and hearts underwent quantitative shotgun proteomic analysis. ID reduced body weight and increased relative heart weights at all time points assessed, despite recovering from anemia by PD28. Echocardiographic studies revealed unique functional impairments in ID male and female offspring, characterized by greater systolic dysfunction in the former and greater diastolic dysfunction in the latter. Proteomic analysis revealed down-regulation of structural components by ID, as well as enriched cellular responses to stress; in general, these effects were more pronounced in males. ID causes functional changes in the neonatal heart, which may reflect an inadequate or maladaptive compensation to anemia. This identifies systolic and diastolic dysfunction as comorbidities to perinatal ID anemia which may have important implications for both the short- and long-term cardiac health of newborn babies. Furthermore, therapies which improve cardiac output may mitigate the effects of ID on organ development.
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Affiliation(s)
- Ronan M N Noble
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
| | - Claudia D Holody
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
| | - Andrew G Woodman
- Department of Anesthesiology, University of Alberta, Edmonton, Canada
| | - Chunpeng Nie
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
| | - Si Ning Liu
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
| | - Daniel Young
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Canada
| | - Alyssa Wiedemeyer
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
| | - Shubham Soni
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
| | - Jason R B Dyck
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
| | - Daniel Graf
- School of Dentistry, University of Alberta, Edmonton, Canada
| | - Luke G Eckersley
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
| | - Antoine Dufour
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Canada
| | - Stephane L Bourque
- Department of Pediatrics, University of Alberta, Edmonton, Canada
- Women and Children's Health Research Institute, University of Alberta, Edmonton, Canada
- Department of Anesthesiology, University of Alberta, Edmonton, Canada
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8
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Devine J, Vidal-García M, Liu W, Neves A, Lo Vercio LD, Green RM, Richbourg HA, Marchini M, Unger CM, Nickle AC, Radford B, Young NM, Gonzalez PN, Schuler RE, Bugacov A, Rolian C, Percival CJ, Williams T, Niswander L, Calof AL, Lander AD, Visel A, Jirik FR, Cheverud JM, Klein OD, Birnbaum RY, Merrill AE, Ackermann RR, Graf D, Hemberger M, Dean W, Forkert ND, Murray SA, Westerberg H, Marcucio RS, Hallgrímsson B. Author Correction: MusMorph, a database of standardized mouse morphology data for morphometric meta-analyses. Sci Data 2023; 10:420. [PMID: 37380661 DOI: 10.1038/s41597-023-02320-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2023] Open
Affiliation(s)
- Jay Devine
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Marta Vidal-García
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Wei Liu
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Amanda Neves
- Department of Biology, McMaster University, 1280 Main St W, Hamilton, ON, L8S 4L8, Canada
| | - Lucas D Lo Vercio
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Rebecca M Green
- School of Dental Medicine, University of Pittsburgh, 3501 Terrace St, Pittsburgh, PA, 15213, USA
| | - Heather A Richbourg
- Orthopaedic Trauma Institute, ZSFG, UCSF, 2550 23rd St, San Francisco, CA, 94110, USA
| | - Marta Marchini
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Colton M Unger
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada
- Department of Biological Sciences, University of Calgary, 2500 University Dr NW, Calgary, AB, T2N 1N4, Canada
| | - Audrey C Nickle
- Center for Craniofacial Molecular Biology, Department of Biomedical Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, 2250 Alcazar St, Los Angeles, CA, 90033, USA
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, 1975 Zonal Ave, Los Angeles, CA, 90033, USA
| | - Bethany Radford
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Nathan M Young
- Orthopaedic Trauma Institute, ZSFG, UCSF, 2550 23rd St, San Francisco, CA, 94110, USA
| | - Paula N Gonzalez
- Institute for Studies in Neuroscience and Complex Systems (ENyS) CONICET, Av. Calchaquí, 5402, Florencio Varela, Buenos Aires, Argentina
| | - Robert E Schuler
- Information Sciences Institute, Viterbi School of Engineering, University of Southern California, 4676 Admiralty Way, Marina del Rey, CA, 90292, USA
| | - Alejandro Bugacov
- Information Sciences Institute, Viterbi School of Engineering, University of Southern California, 4676 Admiralty Way, Marina del Rey, CA, 90292, USA
| | - Campbell Rolian
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Christopher J Percival
- Department of Anthropology, Stony Brook University, 100 Nicolls Rd, Stony Brook, NY, 11794, USA
| | - Trevor Williams
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, 12801 East 17th Ave, Aurora, CO, 80045, USA
| | - Lee Niswander
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Anne L Calof
- Department of Anatomy and Neurobiology, University of California, Irvine, Irvine, CA, 92697, USA
- Center for Complex Biological Systems, University of California, Irvine, Irvine, CA, 92697, USA
| | - Arthur D Lander
- Center for Complex Biological Systems, University of California, Irvine, Irvine, CA, 92697, USA
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, 92697, USA
| | - Axel Visel
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, CA, 94720, USA
- U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, CA, 94720, USA
- School of Natural Sciences, University of California, Merced, 5200 Lake Rd, Merced, CA, 95343, USA
| | - Frank R Jirik
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - James M Cheverud
- Department of Biology, Loyola University Chicago, 1032 W Sheridan Rd, Chicago, IL, 60660, USA
| | - Ophir D Klein
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, 513 Parnassus Ave, San Francisco, CA, 94143, USA
- Department of Pediatrics and Institute for Human Genetics, University of California, San Francisco, 513 Parnassus Ave, San Francisco, CA, 94143, USA
- Department of Pediatrics, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Ramon Y Birnbaum
- Department of Life Sciences, Faculty of Natural Sciences, The Ben-Gurion University of the Negev, David Ben Gurion Blvd 1, Be'er Sheva, Israel
| | - Amy E Merrill
- Center for Craniofacial Molecular Biology, Department of Biomedical Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, 2250 Alcazar St, Los Angeles, CA, 90033, USA
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, 1975 Zonal Ave, Los Angeles, CA, 90033, USA
| | - Rebecca R Ackermann
- Department of Archaeology, University of Cape Town, Rondebosch, Cape Town, 7700, South Africa
- Human Evolution Research Institute, University of Cape Town, Rondebosch, Cape Town, 7700, South Africa
| | - Daniel Graf
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, 116 St. and 85 Ave, Edmonton, AB, T6G 2R3, Canada
- Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, 116 St. and 85 Ave, Edmonton, AB, T6G 2R3, Canada
| | - Myriam Hemberger
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Wendy Dean
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Nils D Forkert
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada
- Department of Radiology, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | | | - Henrik Westerberg
- Department of Bioimaging Informatics, MRC Harwell Institute, Oxfordshire, OX11 0RD, UK
| | - Ralph S Marcucio
- Orthopaedic Trauma Institute, ZSFG, UCSF, 2550 23rd St, San Francisco, CA, 94110, USA
| | - Benedikt Hallgrímsson
- Alberta Children's Hospital Research Institute, University of Calgary, 28 Oki Dr NW, Calgary, AB, T3B 6A8, Canada.
- The McCaig Institute for Bone and Joint Health, University of Calgary, 3280 Hospital Dr NW, Calgary, AB, T2N 4Z6, Canada.
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada.
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9
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Roth DM, Piña JO, MacPherson M, Budden C, Graf D. Physiology and Clinical Manifestations of Pathologic Cranial Suture Widening. Cleft Palate Craniofac J 2023:10556656231178438. [PMID: 37271984 DOI: 10.1177/10556656231178438] [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] [Indexed: 06/06/2023] Open
Abstract
Cranial sutures are complex structures integrating mechanical forces with osteogenesis which are often affected in craniofacial syndromes. While premature fusion is frequently described, rare pathological widening of cranial sutures is a comparatively understudied phenomenon. This narrative review aims to bring to light the biologically variable underlying causes of widened sutures and persistent fontanelles leading to a common outcome. The authors herein present four syndromes, selected from a literature review, and their identified biological mechanisms in the context of altered suture physiology, exploring the roles of progenitor cell differentiation, extracellular matrix production, mineralization, and bone resorption. This article illustrates the gaps in understanding of complex craniofacial disorders, and the potential for further unification of genetics, cellular biology, and clinical pillars of health science research to improve treatment outcomes for patients.
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Affiliation(s)
- Daniela M Roth
- School of Dentistry, University of Alberta, Edmonton, Canada
| | - Jeremie Oliver Piña
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland, USA
| | | | - Curtis Budden
- Department of Surgery, University of Alberta, Edmonton, Canada
| | - Daniel Graf
- School of Dentistry, University of Alberta, Edmonton, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, Canada
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10
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Morrell AP, Martin RA, Roberts HM, Castillo-Michel H, Mosselmans JFW, Geraki K, Warfield AT, Lingor P, Qayyum W, Graf D, Febbraio M, Addison O. Addressing uncertainties in correlative imaging of exogenous particles with the tissue microanatomy with synchronous imaging strategies. Metallomics 2023:7165775. [PMID: 37193667 DOI: 10.1093/mtomcs/mfad030] [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] [Indexed: 05/18/2023]
Abstract
Exposures to exogenous particles is of increasing concern to human health. Characterising the concentrations, chemical species, distribution, and involvement of the stimulus with the tissue microanatomy is essential in understanding the associated biological response. However, no single imaging technique can interrogate all these features at once which confounds and limits correlative analyses. Developments of synchronous imaging strategies, allowing multiple features to be identified simultaneously, is essential to assess spatial relationships between these key features with greater confidence. Here we present data to first highlight complications of correlative analysis between the tissue microanatomy and elemental composition associated with imaging serial tissue sections. This is achieved by assessing both the cellular and elemental distribution in 3-dimensional space using optical microscopy on serial sections and confocal X-ray fluorescence spectroscopy on bulk samples respectively. We propose a new imaging strategy using lanthanide tagged antibodies with X-ray fluorescence spectroscopy. Using simulations, a series of lanthanide tags were identified as candidate labels for scenarios where tissue sections are imaged. The feasibility and value of the proposed approach is shown where an exposure of Ti was identified concurrently with CD45 positive cells at sub-cellular resolutions. Significant heterogeneity in the distribution of exogenous particles and cells can be present between immediately adjacent serial sections showing clear need of synchronous imaging methods. The proposed approach enables elemental compositions to be correlated with the tissue microanatomy in a highly multiplexed and non-destructive manner at high spatial resolutions with the opportunity for subsequent guided analysis.
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Affiliation(s)
- Alexander P Morrell
- Faculty of Dentistry, Oral & Craniofacial Science, Kings College London, Guy's Hospital, London, UK
- Aston Institute of Materials Research, Aston University, Aston Triangle, Birmingham, UK
| | - Richard A Martin
- Aston Institute of Materials Research, Aston University, Aston Triangle, Birmingham, UK
| | - Helen M Roberts
- Oral Health Clinical & Translational Research Centre, University of Alberta, Edmonton, Canada
| | | | | | | | - Adrian T Warfield
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Paul Lingor
- Department of Neurology, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
| | - Wasif Qayyum
- Oral Health Clinical & Translational Research Centre, University of Alberta, Edmonton, Canada
| | - Daniel Graf
- Oral Health Clinical & Translational Research Centre, University of Alberta, Edmonton, Canada
| | - Maria Febbraio
- Oral Health Clinical & Translational Research Centre, University of Alberta, Edmonton, Canada
| | - Owen Addison
- Faculty of Dentistry, Oral & Craniofacial Science, Kings College London, Guy's Hospital, London, UK
- Oral Health Clinical & Translational Research Centre, University of Alberta, Edmonton, Canada
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11
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Graf D, Lerch S, Böhnke U, Reichl C, Kindler J, Koenig J, Kaess M. Treatment outcome of an intensive psychiatric home treatment for children and adolescents: a non-randomized controlled pilot evaluation. Eur Child Adolesc Psychiatry 2023; 32:685-695. [PMID: 34853908 PMCID: PMC8635478 DOI: 10.1007/s00787-021-01919-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 11/19/2021] [Indexed: 12/29/2022]
Abstract
Home treatment (HT) may offer an effective and cost-efficient alternative to inpatient treatment for children and adolescents with acute mental disorders. This study introduces and evaluates a pilot HT project from Bern, Switzerland, with HT completely replacing an inpatient treatment. A total of n = 133 children and adolescents with acute mental disorders and inpatient treatment needs were treated either in the new HT program (n = 37) or in an active control group with inpatient treatment as usual (I-TAU, n = 96). Psychopathological burden was assessed by the Health of the Nation Outcome Scale for Children and Adolescents clinician-rated (HoNOSCA) and self-rated (HoNOSCA-SR) at the time of admission and at discharge. Treatment effects were assessed and compared using Augmented Inverse Probability Weights to adjust for baseline differences and to control for treatment duration. Participants ranged in age from 6 to 17 years (M = 13.71 years, SD = 2.93), 54% were female. HT resulted in significant improvements in the HoNOSCA (d = 0.79, p < .001) and HoNOSCA-SR (d = 0.63, p = .006). No significant differences on treatment effects were observed between HT and the reference group I-TAU in the HoNOSCA (d = 0.01, p = .96) or the HoNOSCA-SR (d = 0.11, p = .63). Overall, results indicate HT to be an effective alternative for children and adolescents with acute mental health disorders instead of hospitalization. Further evaluation with random group allocation and long-term follow-up should attempt to replicate and extend the current findings.
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Affiliation(s)
- Daniel Graf
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
| | - Stefan Lerch
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
| | - Ulrich Böhnke
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
| | - Corinna Reichl
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
| | - Jochen Kindler
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
| | - Julian Koenig
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
- Department of Child and Adolescent Psychiatry, Center for Psychosocial Medicine, University of Heidelberg, Heidelberg, Germany
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Michael Kaess
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland.
- Department of Child and Adolescent Psychiatry, Center for Psychosocial Medicine, University of Heidelberg, Heidelberg, Germany.
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12
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Ambroise M, Sacchetta F, Graf D, Ochsenfeld C, Dreuw A. Scaled opposite-spin atomic-orbital based algebraic diagrammatic construction scheme for the polarization propagator with asymptotic linear-scaling effort: Theory and Implementation. J Chem Phys 2023; 158:124121. [PMID: 37003750 DOI: 10.1063/5.0139894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023] Open
Abstract
A novel local approach for the quantum-chemical computation of excited states is presented, where the concept of the atomic-orbital formulation of the second-order Møller-Plesset energy expression is extended to the second-order algebraic diagrammatic construction scheme by virtue of the Laplace transform. The scaled opposite spin second-order algebraic diagrammatic construction method with Cholesky decomposeddensities and density-fitting, or CDD-DF-SOS-ADC(2) for short, exploits thesparsity of the two-electron repulsion integrals, the atomic ground-state density matrix, and the atomic transition density matrix to drastically reduce the computational effort. By using a local density-fitting approximation, it is shown that asymptotically linear scaling can be achieved for linear carboxylic acids. For electron-dense systems, sub-cubic scaling can be achieved if the excitation is local, and hence the transition density is sparse. Furthermore, the memory footprint and accuracy of theCDD-DF-SOS-ADC(2) method are explored in detail.
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Affiliation(s)
- Maximilien Ambroise
- Ruprecht Karls University Heidelberg Interdisciplinary Center for Scientific Computing, Germany
| | | | - Daniel Graf
- Ludwig Maximilians Universität München Department Chemie, Germany
| | | | - Andreas Dreuw
- Interdisciplinary Center for Scientific Computing, Ruprecht Karls University Heidelberg Interdisciplinary Center for Scientific Computing, Germany
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13
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Schmid N, Bruderer S, Paruzzo F, Fischetti G, Toscano G, Graf D, Fey M, Henrici A, Ziebart V, Heitmann B, Grabner H, Wegner JD, Sigel RKO, Wilhelm D. Deconvolution of 1D NMR spectra: A deep learning-based approach. J Magn Reson 2023; 347:107357. [PMID: 36563418 DOI: 10.1016/j.jmr.2022.107357] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/01/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
The analysis of nuclear magnetic resonance (NMR) spectra to detect peaks and characterize their parameters, often referred to as deconvolution, is a crucial step in the quantification, elucidation, and verification of the structure of molecular systems. However, deconvolution of 1D NMR spectra is a challenge for both experts and machines. We propose a robust, expert-level quality deep learning-based deconvolution algorithm for 1D experimental NMR spectra. The algorithm is based on a neural network trained on synthetic spectra. Our customized pre-processing and labeling of the synthetic spectra enable the estimation of critical peak parameters. Furthermore, the neural network model transfers well to the experimental spectra and demonstrates low fitting errors and sparse peak lists in challenging scenarios such as crowded, high dynamic range, shoulder peak regions as well as broad peaks. We demonstrate in challenging spectra that the proposed algorithm is superior to expert results.
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Affiliation(s)
- N Schmid
- Zurich University of Applied Sciences (ZHAW), Switzerland; University of Zurich (UZH), Switzerland.
| | | | | | | | | | - D Graf
- Bruker Switzerland AG, Switzerland
| | - M Fey
- Bruker Switzerland AG, Switzerland
| | - A Henrici
- Zurich University of Applied Sciences (ZHAW), Switzerland
| | - V Ziebart
- Zurich University of Applied Sciences (ZHAW), Switzerland
| | | | - H Grabner
- Zurich University of Applied Sciences (ZHAW), Switzerland
| | | | | | - D Wilhelm
- Zurich University of Applied Sciences (ZHAW), Switzerland
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14
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Drontschenko V, Graf D, Laqua H, Ochsenfeld C. Efficient Method for the Computation of Frozen-Core Nuclear Gradients within the Random Phase Approximation. J Chem Theory Comput 2022; 18:7359-7372. [PMID: 36331398 DOI: 10.1021/acs.jctc.2c00774] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A method for the evaluation of analytical frozen-core gradients within the random phase approximation is presented. We outline an efficient way to evaluate the response of the density of active electrons arising only when introducing the frozen-core approximation and constituting the main difficulty, together with the response of the standard Kohn-Sham density. The general framework allows to extend the outlined procedure to related electron correlation methods in the atomic orbital basis that require the evaluation of density responses, such as second-order Møller-Plesset perturbation theory or coupled cluster variants. By using Cholesky decomposed densities─which reintroduce the occupied index in the time-determining steps─we are able to achieve speedups of 20-30% (depending on the size of the basis set) by using the frozen-core approximation, which is of similar magnitude as for molecular orbital formulations. We further show that the errors introduced by the frozen-core approximation are practically insignificant for molecular geometries.
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Affiliation(s)
- Viktoria Drontschenko
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), 81377 Munich, Germany
| | - Daniel Graf
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), 81377 Munich, Germany
| | - Henryk Laqua
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), 81377 Munich, Germany
| | - Christian Ochsenfeld
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), 81377 Munich, Germany.,Max Planck Institute for Solid State Research, D-70569 Stuttgart, Germany
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15
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Ma Z, Li DX, Chee RKW, Kunze M, Mulet-Sierra A, Sommerfeldt M, Westover L, Graf D, Adesida AB. Mechanical Unloading of Engineered Human Meniscus Models Under Simulated Microgravity: A Transcriptomic Study. Sci Data 2022; 9:736. [PMID: 36450785 PMCID: PMC9712603 DOI: 10.1038/s41597-022-01837-x] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 11/14/2022] [Indexed: 12/12/2022] Open
Abstract
Osteoarthritis (OA) primarily affects mechanical load-bearing joints, with the knee being the most common. The prevalence, burden and severity of knee osteoarthritis (KOA) are disproportionately higher in females, but hormonal differences alone do not explain the disproportionate incidence of KOA in females. Mechanical unloading by spaceflight microgravity has been implicated in OA development in cartilaginous tissues. However, the mechanisms and sex-dependent differences in OA-like development are not well explored. In this study, engineered meniscus constructs were generated from healthy human meniscus fibrochondrocytes (MFC) seeded onto type I collagen scaffolds and cultured under normal gravity and simulated microgravity conditions. We report the whole-genome sequences of constructs from 4 female and 4 male donors, along with the evaluation of their phenotypic characteristics. The collected data could be used as valuable resources to further explore the mechanism of KOA development in response to mechanical unloading, and to investigate the molecular basis of the observed sex differences in KOA.
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Affiliation(s)
- Zhiyao Ma
- grid.17089.370000 0001 2190 316XDepartment of Surgery, Division of Orthopaedic Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2E1 Canada
| | - David Xinzheyang Li
- grid.17089.370000 0001 2190 316XDepartment of Surgery, Division of Orthopaedic Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2E1 Canada ,grid.17089.370000 0001 2190 316XDepartment of Civil & Environmental Engineering, University of Alberta, Edmonton, AB Canada
| | - Ryan K. W. Chee
- grid.17089.370000 0001 2190 316XDepartment of Surgery, Division of Orthopaedic Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2E1 Canada
| | - Melanie Kunze
- grid.17089.370000 0001 2190 316XDepartment of Surgery, Division of Orthopaedic Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2E1 Canada
| | - Aillette Mulet-Sierra
- grid.17089.370000 0001 2190 316XDepartment of Surgery, Division of Orthopaedic Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2E1 Canada
| | - Mark Sommerfeldt
- grid.17089.370000 0001 2190 316XDepartment of Surgery, Division of Orthopaedic Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2E1 Canada
| | - Lindsey Westover
- grid.17089.370000 0001 2190 316XDepartment of Mechanical Engineering, University of Alberta, Edmonton, AB Canada
| | - Daniel Graf
- grid.17089.370000 0001 2190 316XSchool of Dentistry, University of Alberta, Edmonton, AB Canada
| | - Adetola B. Adesida
- grid.17089.370000 0001 2190 316XDepartment of Surgery, Division of Orthopaedic Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2E1 Canada
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16
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Sacchetta F, Graf D, Laqua H, Ambroise MA, Kussmann J, Dreuw A, Ochsenfeld C. An effective sub-quadratic scaling atomic-orbital reformulation of the scaled opposite-spin RI-CC2 ground-state model using Cholesky-decomposed densities and an attenuated Coulomb metric. J Chem Phys 2022; 157:104104. [DOI: 10.1063/5.0098719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
An atomic-orbital reformulation of the Laplace-transformed scaled opposite-spin (SOS) coupled cluster singles and doubles (CC2) model within the resolution of the identity (RI) approximation (SOS-RI-CC2) is presented that extends its applicability to molecules with several hundreds of atoms and triple-zeta basis sets. We exploit sparse linear algebra and an attenuated Coulomb metric to decrease the disk space demands and the computational efforts. In this way, an effective sub-quadratic computational scaling is achieved with our ω-SOS-CDD-RI-CC2 model. Moreover, Cholesky decomposition of the ground-state one-electron density matrix reduces the prefactor, allowing for an early crossover with the molecular orbital formulation. The accuracy and performance of the presented method are investigated for various molecular systems.
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Affiliation(s)
- F. Sacchetta
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
| | - D. Graf
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
| | - H. Laqua
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
| | - M. A. Ambroise
- Chair of Theoretical and Computational Chemistry, Interdisciplinary Center for Scientific Computing, Heidelberg University, Heidelberg, Germany
| | - J. Kussmann
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
| | - A. Dreuw
- Chair of Theoretical and Computational Chemistry, Interdisciplinary Center for Scientific Computing, Heidelberg University, Heidelberg, Germany
| | - C. Ochsenfeld
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
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17
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Wong N, Yanagida T, Spiel C, Graf D. The Association between Appetitive Aggression and Social Media Addiction Mediated by Cyberbullying: The Moderating Role of Inclusive Norms. Int J Environ Res Public Health 2022; 19:9956. [PMID: 36011592 PMCID: PMC9407729 DOI: 10.3390/ijerph19169956] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/07/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
Appetitive aggression, i.e., the motivation to obtain rewards through aggressive behaviors, has been suggested as a key driver of cyberbullying. Due to the contextual properties of cyberspace (e.g., anonymity), it is assumed that the negative effects of cyberbullying are masked, leading to a preponderance of its positive outcomes (e.g., thrill). Since cyberbullying occurs predominantly in social media, reward-learning effects may lead to problematic social media use, such as addiction. Anti-cyberbullying inclusive norms might act as a buffering factor to break this chain. However, while inclusive norms are known to reduce cyberbullying in general, their influence on the indirect effect of appetitive aggression via cyberbullying on social media addiction is yet unknown. The present study examined this indirect effect, while taking the moderating role of inclusive norms into account. A total of 1064 adolescents (42.05% male, Mage = 14.07, SD = 2.15) completed questionnaires. Results revealed the indirect effect of appetitive aggression on social media addiction through cyberbullying as expected. Surprisingly, this indirect effect was amplified with increasing anti-cyberbullying inclusive norms. Our findings indicate that appetitive aggression, which manifests in cyberbullying, contributes to the development of social media addiction. The unexpected results and the implications of our findings were discussed.
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Affiliation(s)
- Natalie Wong
- Department of Educational Psychology, The Chinese University of Hong Kong, Hong Kong
| | - Takuya Yanagida
- Department for Psychology of Development and Education, Faculty of Psychology, University of Vienna, Universitätsstraße 7, 1010 Vienna, Austria
| | - Christiane Spiel
- Department for Psychology of Development and Education, Faculty of Psychology, University of Vienna, Universitätsstraße 7, 1010 Vienna, Austria
| | - Daniel Graf
- Department for Psychology of Development and Education, Faculty of Psychology, University of Vienna, Universitätsstraße 7, 1010 Vienna, Austria
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18
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Lemke Y, Graf D, Kussmann J, Ochsenfeld C. An assessment of orbital energy corrections for the direct random phase approximation and explicit σ-functionals. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2098862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Yannick Lemke
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
| | - Daniel Graf
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
| | - Jörg Kussmann
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
| | - Christian Ochsenfeld
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Munich, Germany
- Max Planck Institute for Solid State Research, Stuttgart, Germany
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19
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Roth DM, Souter K, Graf D. Craniofacial sutures: Signaling centres integrating mechanosensation, cell signaling, and cell differentiation. Eur J Cell Biol 2022; 101:151258. [PMID: 35908436 DOI: 10.1016/j.ejcb.2022.151258] [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: 02/07/2022] [Revised: 07/20/2022] [Accepted: 07/21/2022] [Indexed: 11/03/2022] Open
Abstract
Cranial sutures are dynamic structures in which stem cell biology, bone formation, and mechanical forces interface, influencing the shape of the skull throughout development and beyond. Over the past decade, there has been significant progress in understanding mesenchymal stromal cell (MSC) differentiation in the context of suture development and genetic control of suture pathologies, such as craniosynostosis. More recently, the mechanosensory function of sutures and the influence of mechanical signals on craniofacial development have come to the forefront. There is currently a gap in understanding of how mechanical signals integrate with MSC differentiation and ossification to ensure appropriate bone development and mediate postnatal growth surrounding sutures. In this review, we discuss the role of mechanosensation in the context of cranial sutures, and how mechanical stimuli are converted to biochemical signals influencing bone growth, suture patency, and fusion through mediation of cell differentiation. We integrate key knowledge from other paradigms where mechanosensation forms a critical component, such as bone remodeling and orthodontic tooth movement. The current state of the field regarding genetic, cellular, and physiological mechanisms of mechanotransduction will be contextualized within suture biology.
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Affiliation(s)
- Daniela Marta Roth
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.
| | - Katherine Souter
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.
| | - Daniel Graf
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada; Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.
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20
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Taglienti M, Graf D, Schumacher V, Kreidberg JA. Bmp7 drives proximal tubule expansion and determines nephron number in the developing kidney. Development 2022; 149:dev200773. [PMID: 35877077 PMCID: PMC9382899 DOI: 10.1242/dev.200773] [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] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 06/23/2022] [Indexed: 07/27/2023]
Abstract
The mammalian kidney is composed of thousands of nephrons that are formed through reiterative induction of a mesenchymal-to-epithelial transformation by a population of nephron progenitor cells. The number of nephrons in human kidneys ranges from several hundred thousand to nearly a million, and low nephron number has been implicated as a risk factor for kidney disease as an adult. Bmp7 is among a small number of growth factors required to support the proliferation and self-renewal of nephron progenitor cells, in a process that will largely determine the final nephron number. Once induced, each nephron begins as a simple tubule that undergoes extensive proliferation and segmental differentiation. Bmp7 is expressed both by nephron progenitor cells and the ureteric bud derivative branches that induce new nephrons. Here, we show that, in mice, Bmp7 expressed by progenitor cells has a major role in determining nephron number; nephron number is reduced to one tenth its normal value in its absence. Postnatally, Bmp7 also drives proliferation of the proximal tubule cells, and these ultimately constitute the largest segment of the nephron. Bmp7 appears to act through Smad 1,5,9(8), p38 and JNK MAP kinase. In the absence of Bmp7, nephrons undergo a hypertrophic process that involves p38. Following a global inactivation of Bmp7, we also see evidence for Bmp7-driven growth of the nephron postnatally. Thus, we identify a role for Bmp7 in supporting the progenitor population and driving expansion of nephrons to produce a mature kidney.
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Affiliation(s)
- Mary Taglienti
- Department of Urology, Harvard Medical School, Boston, MA 02115, USA
| | - Daniel Graf
- School of Dentistry and Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB T6G 2R7, Canada
| | - Valerie Schumacher
- Department of Urology, Harvard Medical School, Boston, MA 02115, USA
- Division of Nephrology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
- Departments of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| | - Jordan A. Kreidberg
- Department of Urology, Harvard Medical School, Boston, MA 02115, USA
- Departments of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
- Harvard Stem Cell Institute, Cambridge, MA 02139, USA
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21
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Abrol N, Compton SM, Graf D, Parashar P, Heo G, Gibson MP. Inflammatory bowel disease and periodontitis: A retrospective chart analysis. Clin Exp Dent Res 2022; 8:1028-1034. [PMID: 35707842 PMCID: PMC9562573 DOI: 10.1002/cre2.609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 05/29/2022] [Accepted: 05/30/2022] [Indexed: 12/03/2022] Open
Abstract
Objectives This study examined the variation in prevalence of periodontitis among different sexes, age groups, smoking status, and oral hygiene adherence in patients affected by either Crohn's disease (CD) or ulcerative colitis (UC). Materials & Methods This study was a retrospective chart analysis that collected data from the School of Dentistry's Oral Health Clinic at the University of Alberta, Edmonton, Canada. Patients' electronic health records between the years of 2013 and 2019 were analyzed. Multiple keywords such as IBD, CD, UC, and periodontal disease with various spelling combinations were used for searching and gathering pertinent data, which was then further assessed. After applying the inclusion and exclusion criteria, a total of 80 patient charts were included. These patient charts were thoroughly screened to gather information such as age, sex, smoking status, and a variety of periodontal parameters. Collected data were analyzed using SPSS software by using Pearson's χ2, Pearson's correlation, and Mann–Whitney U‐test. Results IBD had an impact on the severity of periodontitis in patients between the ages of 50 and 64 years with higher odds ratio (OR). Biological sex or history of smoking in IBD patients did not have higher odds of developing periodontitis. Plaque score derived from this retrospective study was used to estimate the patient's oral hygiene status and showed no impact. Also, prevalence of periodontitis did not differ between UC and CD. We anticipated some of these findings because of the retrospective nature of the study. Conclusions Within the limitation of the retrospective study, IBD patients in the 50–64 age group years showed a higher odds ratio for a greater prevalence of periodontitis. Thus, a closer periodontal recall and evaluation in these patients is recommended for early diagnosis and preventive care. It is advised that periodontists work closely with gastroenterologists to maintain periodontal health in IBD‐affected individuals.
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Affiliation(s)
- Nazia Abrol
- School of Dentistry University of Alberta Faculty of Medicine and Dentistry Edmonton Alberta Canada
| | - Sharon M. Compton
- School of Dentistry University of Alberta Faculty of Medicine and Dentistry Edmonton Alberta Canada
| | - Daniel Graf
- School of Dentistry University of Alberta Faculty of Medicine and Dentistry Edmonton Alberta Canada
| | - Pallavi Parashar
- School of Dentistry University of Alberta Faculty of Medicine and Dentistry Edmonton Alberta Canada
| | - Giseon Heo
- School of Dentistry University of Alberta Faculty of Medicine and Dentistry Edmonton Alberta Canada
| | - Monica P. Gibson
- School of Dentistry University of Alberta Faculty of Medicine and Dentistry Edmonton Alberta Canada
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22
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Fagundes NCF, Perez-Garcia A, Graf D, Flores-Mir C, Heo G. Orthodontic interventions as a management option for children with residual obstructive sleep apnea: a cohort study protocol. BMJ Open 2022; 12:e061651. [PMID: 35705345 PMCID: PMC9204397 DOI: 10.1136/bmjopen-2022-061651] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
INTRODUCTION Obstructive sleep apnoea (OSA) is a sleep-breathing disorder that seems likely to have long-term negative social and health consequences in children and adolescents. There are no established standard management approaches when the first line of therapy, the tonsillectomy and adenoidectomy (T&A), is not indicated or fails to address paediatric OSA (residual paediatric OSA). This protocol describes a prospective cohort study that aims to assess the effectiveness of orthodontic interventions for managing residual paediatric OSA in patients with concomitant craniofacial issues. METHODS AND ANALYSIS Children aged 6-16 years who with an OSA diagnosis and did not benefit from previous T&A or qualified for T&A will be recruited. Orthodontic intervention(s), when adequately indicated (maxillary expansion, mandibular advancement or maxillary complex advancement with skeletal anchored headgear), and a control (orthodontic intervention declined) cohorts will be involved. A sample size of 70 participants (n=35 per cohort) is planned. Effectiveness data will be assessed through nocturnal polysomnography, a craniofacial index, sleep questionnaires and medical records. Additionally, the association of residual OSA and two comorbidities, obesity and asthma, will be investigated through assessing blood, urine and saliva metabolites. The changes on body mass index will also be investigated as a secondary outcome. Other additional outcomes, including association between residual paediatric OSA and periodic limbs movement, restless leg syndrome, insomnia, and the use of abiometric shirt to sleep monitoring purposes will also be considered. All participants will be followed up for 12 months after treatment allocation. The effectiveness of the intervention will be analysed by the assessment of sleep parameters, medical history (from medical chart reviews), questionnaire responses, craniofacial characteristics and metabolomic markers using an algorithm to be developed. ETHICS AND DISSEMINATION This study was approved by the Health Research Ethics Board-Health Panel, University of Alberta, Edmonton, Canada (Pro00084763). The findings will be shared with scientific and patient content-specific social network communities to maximise their impact on clinical practice and future research in the study topic. TRIAL REGISTRATION NUMBER NCT03821831; Pre-results.
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Affiliation(s)
| | | | - Daniel Graf
- Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | | | - Giseon Heo
- Dentistry, University of Alberta, Edmonton, Alberta, Canada
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23
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Rane S, Elrahi S, Villarreal J, Zulfi H, Fang X, Graf D, Rodriguez R, Garza A, Thottempudi N, Rai P, Masel T. Low Serum Pyridoxine Levels Worsen Seizure Control in Adult Epilepsy Patients. Cureus 2022; 14:e25669. [PMID: 35812624 PMCID: PMC9256010 DOI: 10.7759/cureus.25669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2022] [Indexed: 11/05/2022] Open
Abstract
Background: Vitamin B6 (pyridoxine) is an important cofactor in the process by which glutamic acid decarboxylase (GAD) converts the excitatory, pro-epileptogenic neurotransmitter, glutamate, into the inhibitory, anti-epileptogenic neurotransmitter, gamma-aminobutyric acid (GABA). This concept has been established in infants with pyridoxine-dependent epilepsy as well as adult patients with other epilepsy subtypes who presented with medication-resistant status epilepticus, with both patient groups experiencing cessation of seizure activity following pyridoxine administration. Given our knowledge of the role of vitamin B6 in the conversion of glutamate to GABA, its effect on seizure control in infants with specific epilepsy subtypes, reports of adult-onset seizures associated with vitamin B6 deficiency, and vitamin B6’s role in terminating status epilepticus in adult patients with other types of epilepsy, we suspect that low vitamin B6 levels in adult epilepsy patients may correlate with poor seizure control across all epilepsy subtypes. This study seeks to determine whether there is a relationship between pyridoxine levels and the level of seizure control in adults with epilepsy, regardless of their seizure type. Methods: After obtaining institutional review board approval, we prospectively enrolled 32 patients (age range: 25-57 years) with epilepsy who presented to our clinic. Patients who did not meet the study criteria or who were diagnosed with psychogenic non-epileptic seizures (PNES) were excluded from the study (n = 2). Patients were classified as well-controlled (WC) or poorly controlled (PC) based on the absence or presence of a seizure within the last three months, respectively. After classification as WC or PC, pyridoxine serum levels and anti-seizure medication (ASM) levels were drawn in that clinic visit, following patient consent. All patients were contacted regarding pyridoxine and serum ASM levels, and patients that were found to be deficient in pyridoxine were treated with appropriate supplementation. At the end of the recruitment period, we performed analyses to determine if there was a statistically significant relationship between PC status and serum pyridoxine levels. Results: Of 32 patients, two patients were diagnosed with psychogenic non-epileptic events and were subsequently excluded. Of 30 patients, 10 had PC epilepsy. Median (interquartile range) serum B6 levels were 35.8 (26.8-54.2) in patients with WC epilepsy and 17.5 (10.1-41.3) in patients with PC epilepsy (P = 0.11). In the PC group, 6/10 (60%) of the patients demonstrated low serum pyridoxine compared to 3/20 (15%) in the WC group (P = 0.03). Conclusion: There was a statistically significant relationship between serum pyridoxine levels and seizure control. If appropriate, pyridoxine supplementation should be considered, especially in critically ill adult patients with refractory or PC seizures despite good adherence to ASMs.
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Abstract
OBJECTIVE Nasal septum cartilage is a hyaline cartilage that provides structural support to the nasal cavity and midface. Currently, information on its cellular and mechanical properties is widely dispersed and has often been inferred from studies conducted on other cartilage types such as the knee. A detailed understanding of nasal cartilage properties is important for several biological, clinical, and engineering disciplines. The objectives of this scoping review are to (1) consolidate actual existing knowledge on nasal cartilage properties and (2) identify gaps of knowledge and research questions requiring future investigations. DESIGN This scoping review incorporated articles identified using PROSPERO, Cochrane Library (CDSR and Central), WOS BIOSIS, WOS Core Collection, and ProQuest Dissertations and Theses Global databases. Following the screening process, 86 articles were considered. Articles were categorized into three groups: growth, extracellular matrix, and mechanical properties. RESULTS Most articles investigated growth properties followed by extracellular matrix and mechanical properties. NSC cartilage is not uniform. Nasal cartilage growth varies with age and location. Similarly, extracellular matrix composition and mechanical properties are location-specific within the NSC. Moreover, most articles included in the review investigate these properties in isolation and only very few articles demonstrate the interrelationship between multiple cartilage properties. CONCLUSIONS This scoping review presents a first comprehensive description of research on NSC properties with a focus on NSC growth, extracellular matrix and mechanical properties. It additionally identifies the needs (1) to understand how these various cartilage properties intersect and (2) for more granular, standardized assessment protocols to describe NSC.
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Affiliation(s)
- Pranidhi Baddam
- School of Dentistry, University of Alberta, Edmonton, AB, Canada
| | | | - Sandra M. Campbell
- John W. Scott Health Sciences Library, University of Alberta, Edmonton, AB, Canada
| | - Hamdy El-Hakim
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Daniel Graf
- School of Dentistry, University of Alberta, Edmonton, AB, Canada,Daniel Graf, School of Dentistry, University of Alberta, 7020N Katz Group Centre For Research, 11315 - 87 Ave NW, Edmonton, AB T6G 2H5, Canada.
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25
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Graf D, Yanagida T, Runions K, Spiel C. Why did you do that? Differential types of aggression in offline and in cyberbullying. Computers in Human Behavior 2022. [DOI: 10.1016/j.chb.2021.107107] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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26
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Fox SC, Widen SA, Asai-Coakwell M, Havrylov S, Benson M, Prichard LB, Baddam P, Graf D, Lehmann OJ, Waskiewicz AJ. BMP3 is a novel locus involved in the causality of ocular coloboma. Hum Genet 2022; 141:1385-1407. [PMID: 35089417 DOI: 10.1007/s00439-022-02430-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 01/04/2022] [Indexed: 12/29/2022]
Abstract
Coloboma, a congenital disorder characterized by gaps in ocular tissues, is caused when the choroid fissure fails to close during embryonic development. Several loci have been associated with coloboma, but these represent less than 40% of those that are involved with this disease. Here, we describe a novel coloboma-causing locus, BMP3. Whole exome sequencing and Sanger sequencing of patients with coloboma identified three variants in BMP3, two of which are predicted to be disease causing. Consistent with this, bmp3 mutant zebrafish have aberrant fissure closure. bmp3 is expressed in the ventral head mesenchyme and regulates phosphorylated Smad3 in a population of cells adjacent to the choroid fissure. Furthermore, mutations in bmp3 sensitize embryos to Smad3 inhibitor treatment resulting in open choroid fissures. Micro CT scans and Alcian blue staining of zebrafish demonstrate that mutations in bmp3 cause midface hypoplasia, suggesting that bmp3 regulates cranial neural crest cells. Consistent with this, we see active Smad3 in a population of periocular neural crest cells, and bmp3 mutant zebrafish have reduced neural crest cells in the choroid fissure. Taken together, these data suggest that Bmp3 controls Smad3 phosphorylation in neural crest cells to regulate early craniofacial and ocular development.
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Affiliation(s)
- Sabrina C Fox
- Department of Biological Sciences, University of Alberta, 11455 Saskatchewan Drive, Edmonton, AB, T6G 2E9, Canada.,Women and Children's Health Research Institute, University of Alberta, Edmonton, AB, Canada
| | - Sonya A Widen
- Department of Biological Sciences, University of Alberta, 11455 Saskatchewan Drive, Edmonton, AB, T6G 2E9, Canada.,Vienna BioCenter, Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna, Austria.,Women and Children's Health Research Institute, University of Alberta, Edmonton, AB, Canada
| | - Mika Asai-Coakwell
- Department of Animal and Poultry and Animal Science, University of Saskatchewan, Saskatoon, SK, Canada.,Department of Ophthalmology, University of Alberta, Edmonton, AB, Canada
| | - Serhiy Havrylov
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada.,Department of Ophthalmology, University of Alberta, Edmonton, AB, Canada
| | - Matthew Benson
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada.,Department of Ophthalmology, University of Alberta, Edmonton, AB, Canada
| | - Lisa B Prichard
- Department of Biological Sciences, MacEwan University, Edmonton, AB, Canada
| | - Pranidhi Baddam
- Department of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Daniel Graf
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada.,Department of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Ordan J Lehmann
- Women and Children's Health Research Institute, University of Alberta, Edmonton, AB, Canada.,Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada.,Department of Ophthalmology, University of Alberta, Edmonton, AB, Canada
| | - Andrew J Waskiewicz
- Department of Biological Sciences, University of Alberta, 11455 Saskatchewan Drive, Edmonton, AB, T6G 2E9, Canada. .,Women and Children's Health Research Institute, University of Alberta, Edmonton, AB, Canada.
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Chung YJ, Graf D, Engel LW, Rosales KAV, Madathil PT, Baldwin KW, West KW, Pfeiffer LN, Shayegan M. Correlated States of 2D Electrons near the Landau Level Filling ν=1/7. Phys Rev Lett 2022; 128:026802. [PMID: 35089735 DOI: 10.1103/physrevlett.128.026802] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/27/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The ground state of two-dimensional electron systems (2DESs) at low Landau level filling factors (ν≲1/6) has long been a topic of interest and controversy in condensed matter. Following the recent breakthrough in the quality of ultrahigh-mobility GaAs 2DESs, we revisit this problem experimentally and investigate the impact of reduced disorder. In a GaAs 2DES sample with density n=6.1×10^{10}/cm^{2} and mobility μ=25×10^{6} cm^{2}/V s, we find a deep minimum in the longitudinal magnetoresistance (R_{xx}) at ν=1/7 when T≃104 mK. There is also a clear sign of a developing minimum in R_{xx} at ν=2/13. While insulating phases are still predominant when ν≲1/6, these minima strongly suggest the existence of fractional quantum Hall states at filling factors that comply with the Jain sequence ν=p/(2mp±1) even in the very low Landau level filling limit. The magnetic-field-dependent activation energies deduced from the relation R_{xx}∝e^{E_{A}/2kT} corroborate this view and imply the presence of pinned Wigner solid states when ν≠p/(2mp±1). Similar results are seen in another sample with a lower density, further generalizing our observations.
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Affiliation(s)
- Yoon Jang Chung
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - D Graf
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
| | - L W Engel
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
| | - K A Villegas Rosales
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - P T Madathil
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - K W Baldwin
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - K W West
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - L N Pfeiffer
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - M Shayegan
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, USA
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28
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Roth DM, Puttagunta L, Graf D. Histological Techniques for Sectioning Bones of the Vertebrate Craniofacial Skeleton. Methods Mol Biol 2022; 2403:187-200. [PMID: 34913123 DOI: 10.1007/978-1-0716-1847-9_12] [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] [Indexed: 06/14/2023]
Abstract
Histochemical analysis is an indispensable technique in the field of biology used routinely to characterize pathologies of interest throughout the system. This chapter provides the craniofacial biologist with an introduction to tissue harvesting, embedding, and sectioning as well as a toolkit of useful stains for stromal/mesenchymal tissues including bone and cartilage. Techniques are tailored to decalcified, paraffin-embedded mouse tissue; however, these methods are applicable under a broad range of conditions.
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Affiliation(s)
- Daniela M Roth
- School of Dentistry, University of Alberta, Edmonton, AB, Canada.
| | - Lakshmi Puttagunta
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Daniel Graf
- School of Dentistry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
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29
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Glasbrenner M, Graf D, Ochsenfeld C. Benchmarking the Accuracy of the Direct Random Phase Approximation and σ-Functionals for NMR Shieldings. J Chem Theory Comput 2021; 18:192-205. [PMID: 34898213 DOI: 10.1021/acs.jctc.1c00866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A method for computing NMR shieldings with the direct random phase approximation (RPA) and the closely related σ-functionals [Trushin, E.; Thierbach, A.; Görling, A. Toward chemical accuracy at low computational cost: density functional theory with σ-functionals for the correlation energy. J. Chem. Phys. 2021, 154, 014104] is presented, which is based on a finite-difference approach. The accuracy is evaluated in benchmark calculations using high-quality coupled cluster values as a reference. Our results show that the accuracy of the computed NMR shieldings using direct RPA is strongly dependent on the density functional theory reference orbitals and improves with increasing amounts of exact Hartree-Fock exchange in the functional. NMR shieldings computed with direct RPA using a Hartree-Fock reference are significantly more accurate than MP2 shieldings and comparable to CCSD shieldings. Also, the basis set convergence is analyzed and it is shown that at least triple-zeta basis sets are required for reliable results.
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Affiliation(s)
- Michael Glasbrenner
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Butenandtstr. 7, D-81377 Munich, Germany
| | - Daniel Graf
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Butenandtstr. 7, D-81377 Munich, Germany
| | - Christian Ochsenfeld
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Butenandtstr. 7, D-81377 Munich, Germany.,Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart, Germany
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30
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Aponte JD, Katz DC, Roth DM, Vidal-García M, Liu W, Andrade F, Roseman CC, Murray SA, Cheverud J, Graf D, Marcucio RS, Hallgrímsson B. Relating multivariate shapes to genescapes using phenotype-biological process associations for craniofacial shape. eLife 2021; 10:68623. [PMID: 34779766 PMCID: PMC8631940 DOI: 10.7554/elife.68623] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 11/12/2021] [Indexed: 12/20/2022] Open
Abstract
Realistic mappings of genes to morphology are inherently multivariate on both sides of the equation. The importance of coordinated gene effects on morphological phenotypes is clear from the intertwining of gene actions in signaling pathways, gene regulatory networks, and developmental processes underlying the development of shape and size. Yet, current approaches tend to focus on identifying and localizing the effects of individual genes and rarely leverage the information content of high-dimensional phenotypes. Here, we explicitly model the joint effects of biologically coherent collections of genes on a multivariate trait – craniofacial shape – in a sample of n = 1145 mice from the Diversity Outbred (DO) experimental line. We use biological process Gene Ontology (GO) annotations to select skeletal and facial development gene sets and solve for the axis of shape variation that maximally covaries with gene set marker variation. We use our process-centered, multivariate genotype-phenotype (process MGP) approach to determine the overall contributions to craniofacial variation of genes involved in relevant processes and how variation in different processes corresponds to multivariate axes of shape variation. Further, we compare the directions of effect in phenotype space of mutations to the primary axis of shape variation associated with broader pathways within which they are thought to function. Finally, we leverage the relationship between mutational and pathway-level effects to predict phenotypic effects beyond craniofacial shape in specific mutants. We also introduce an online application that provides users the means to customize their own process-centered craniofacial shape analyses in the DO. The process-centered approach is generally applicable to any continuously varying phenotype and thus has wide-reaching implications for complex trait genetics.
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Affiliation(s)
- Jose D Aponte
- Department of Cell Biology & Anatomy, Alberta Children's Hospital Research Institute and McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - David C Katz
- Department of Cell Biology & Anatomy, Alberta Children's Hospital Research Institute and McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Daniela M Roth
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
| | - Marta Vidal-García
- Department of Cell Biology & Anatomy, Alberta Children's Hospital Research Institute and McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Wei Liu
- Department of Cell Biology & Anatomy, Alberta Children's Hospital Research Institute and McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Fernando Andrade
- Department of Biology, Loyola University Chicago, Chicago, United States
| | - Charles C Roseman
- Department of Biology, Loyola University Chicago, Chicago, United States
| | | | - James Cheverud
- Department of Biology, Loyola University Chicago, Chicago, United States
| | - Daniel Graf
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada.,Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
| | - Ralph S Marcucio
- Department of Orthopaedic Surgery, School of Medicine, University of California, San Francisco, San Francisco, United States
| | - Benedikt Hallgrímsson
- Department of Cell Biology & Anatomy, Alberta Children's Hospital Research Institute and McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada.,Department of Animal Biology, University of Illinois Urbana Champaign, Urbana, United States
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Kump T, Roth L, Graf D, Antos N. 129: eQUIP-CR revisited: Reflecting on past projects and addressing ongoing improvement needs in a changing environment. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01554-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Drontschenko V, Graf D, Laqua H, Ochsenfeld C. Lagrangian-Based Minimal-Overhead Batching Scheme for the Efficient Integral-Direct Evaluation of the RPA Correlation Energy. J Chem Theory Comput 2021; 17:5623-5634. [PMID: 34431662 DOI: 10.1021/acs.jctc.1c00494] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly memory-efficient integral-direct random phase approximation (RPA) method based on our ω-CDGD-RI-RPA method [Graf, D. J. Chem. Theory Comput. 2018, 14, 2505] is presented that completely alleviates the memory bottleneck of storing the multidimensional three-center integral tensor, which severely limited the tractable system sizes. Based on a Lagrangian formulation, we introduce an optimized batching scheme over the auxiliary and basis-function indices, which allows to compute the optimal number of batches for a given amount of system memory, while minimizing the batching overhead. Thus, our optimized batching constitutes the best tradeoff between program runtime and memory demand. Within this batching scheme, the half-transformed three-center integral tensor BiμM is recomputed for each batch of auxiliary and basis functions. This allows the computation of systems that were out of reach before. The largest system within this work consists of a DNA fragment comprising 1052 atoms and 11 230 basis functions calculated on a single node, which emphasizes the new possibilities of our integral-direct RPA method.
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Affiliation(s)
- Viktoria Drontschenko
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), 81377 Munich, Germany
| | - Daniel Graf
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), 81377 Munich, Germany
| | - Henryk Laqua
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), 81377 Munich, Germany
| | - Christian Ochsenfeld
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), 81377 Munich, Germany.,Max Planck Institute for Solid State Research, D-70569 Stuttgart, Germany
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Baddam P, Thereza-Bussolaro C, Flores-Mir C, Graf D. Nasal cavity structural anomalies in children and adolescents at high risk of sleep-disordered breathing: An exploratory cone-beam computed tomography study. Am J Orthod Dentofacial Orthop 2021; 160:533-543.e2. [PMID: 34334271 DOI: 10.1016/j.ajodo.2020.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 05/01/2020] [Accepted: 05/01/2020] [Indexed: 10/20/2022]
Abstract
INTRODUCTION In this study, we investigated the presence of structural anomalies in the nasal cavity (deviated nasal septum [DNS] and turbinate hypertrophy [TH]) in patients at high risk or not of sleep-disordered breathing (SDB). METHODS A retrospective study considering available cone-beam computed tomography scans of 99 patients was conducted. Dolphin Imaging software (Dolphin Imaging and Management Solutions, Chatsworth, Calif) was used to process the craniofacial scans. A pediatric sleep questionnaire (PSQ) was used to suggest a high risk of SDB. Subjective and objective assessments of DNS and TH were considered. RESULTS Good to excellent intrareliability and interreliability were attained. The prevalence of a PSQ score suggestive of a high risk of SDB in this sample was 59%. The prevalence of subjective DNS and TH assessment was 64% and 70%, respectively. In contrast, on the basis of objective assessments, 27% of patients presented with DNS and 25% with TH. Cross-tabulation of DNS and TH with PSQ score indicated a statistically significant association between subjective DNS and subjective TH and subjective TH and positive PSQ. A positive correlation between age and subjective and objective DNS assessments was also observed. CONCLUSIONS Older patients are more likely to present with DNS. Only the presence of subjectively determined TH in patients is associated with a high risk for SDB. The study reveals that assessment of DNS and TH using cone-beam computed tomography imaging is not likely suitable to strongly suggest patients at high risk for SDB. DNS subjective assessments were capable of identifying less than 5% of deviation.
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Affiliation(s)
- Pranidhi Baddam
- School of Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | | | - Carlos Flores-Mir
- School of Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Daniel Graf
- School of Dentistry, University of Alberta, Edmonton, Alberta, Canada.
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Fernandes Fagundes NC, d'Apuzzo F, Perillo L, Puigdollers A, Gozal D, Graf D, Heo G, Flores-Mir C. Potential impact of pediatric obstructive sleep apnea on mandibular cortical width dimensions. J Clin Sleep Med 2021; 17:1627-1634. [PMID: 33745506 DOI: 10.5664/jcsm.9262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
STUDY OBJECTIVES To analyze differences in mandibular cortical width (MCW) among children diagnosed with obstructive sleep apnea (OSA) or at high- or low-risk for OSA. METHODS A total of 161 children were assessed: 60 children with polysomnographically diagnosed OSA, 56 children presenting symptoms suggestive of high-risk for OSA, and 45 children at low risk for OSA. Children at high- and low-risk for OSA were evaluated through the Pediatric Sleep Questionnaire. MCW was calculated using ImageJ software from panoramic radiograph images available from all participants. Differences between MCW measurements in the 3 groups were evaluated using analysis of covariance and Bonferroni post-hoc tests, with age as a covariate. The association between MCW and specific cephalometric variables was assessed through regression analysis. RESULTS The participants' mean age was 9.6 ± 3.1 years (59% male and 41% female). The mean body mass index z-score was 0.62 ± 1.3. The polysomnographically diagnosed OSA group presented smaller MCW than the group at low-risk for OSA (mean difference = -0.385 mm, P = .001), but no difference with the group at high-risk for OSA (polysomnographically diagnosed OSA vs high-risk OSA: P = .085). In addition, the MCW in the group at high-risk for the OSA was significantly smaller than the group at low-risk for the OSA (mean difference = -0.301 mm, P = .014). The cephalometric variables (Sella-Nasion-A point angle (SNA) and Frankfort - Mandibular Plane angle (FMA)) explained only 8% of the variance in MCW. CONCLUSIONS Reductions in MCW appear to be present among children with OSA or those at high-risk for OSA, suggesting potential interactions between mandibular bone development and/or homeostasis and pediatric OSA. CITATION Fernandes Fagundes NC, d'Apuzzo F, Perillo L, et al. Potential impact of pediatric obstructive sleep apnea on mandibular cortical width dimensions. J Clin Sleep Med. 2021;17(8):1627-1634.
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Affiliation(s)
| | - Fabrizia d'Apuzzo
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, Orthodontic Program, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Letizia Perillo
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, Orthodontic Program, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Andreu Puigdollers
- Department of Orthodontics and Craniofacial Orthopedics, Universitat Internacional de Catalunya, Barcelona, Spain
| | - David Gozal
- Department of Child Health, University of Missouri School of Medicine, Columbia, Missouri
| | - Daniel Graf
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
| | - Giseon Heo
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
| | - Carlos Flores-Mir
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
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Tsekoura EK, Dick T, Pankongadisak P, Graf D, Boluk Y, Uludağ H. Delivery of Bioactive Gene Particles via Gelatin-Collagen-PEG-Based Electrospun Matrices. Pharmaceuticals (Basel) 2021; 14:666. [PMID: 34358092 PMCID: PMC8308744 DOI: 10.3390/ph14070666] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/01/2021] [Accepted: 07/07/2021] [Indexed: 12/22/2022] Open
Abstract
The fabrication of fiber mats via electrospinning has been adopted in the last decades to produce high quality scaffolds for tissue engineering. However, an effective combination of electrospinning methods with gene delivery therapies remains a challenge. In this study, we describe how the delivery of gene complexes via electrospun mats that contain different volumes of gelatin (Gel), collagen (Col), and polyethylene glycol (PEG) can affect gene expression by transfected cells. Non-viral complexes were formulated by using lipid modified polyethylenimine (PEI) polymer and plasmid DNAs (pDNA) like the reporter Green Fluorescent Protein (GFP) and the therapeutically relevant Bone Morphogenetic Protein-2 (BMP-2) and electrospuned after being mixed with different volumes of Gel-Col-PEG mats and delivered to human myoblast (C2C12) and mouse osteoblast cells (MC3T3). The entrapment of GFP complexes via different homogeneous electrospun fiber mats revealed that a high fraction of collagen in the mats affected the quality of the fibers and led to reduced transfection efficiency on target cells. On the other hand, the fabrication of double-layered mats that contained collagen without complexes as a first layer and gelatin-collagen-PEG with complexes as a second layer successfully induced GFP expression and ALP activity in C2C12 cells. We conclude that this study has established the advantage of formulating multilayered bioactive collagen-based mats for gene delivery applications.
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Affiliation(s)
- Eleni K. Tsekoura
- Department of Chemical & Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada; (E.K.T.); (T.D.)
| | - Teo Dick
- Department of Chemical & Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada; (E.K.T.); (T.D.)
| | | | - Daniel Graf
- Department of Dentistry, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2R7, Canada;
| | - Yaman Boluk
- Department of Civil & Environmental Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada;
| | - Hasan Uludağ
- Department of Chemical & Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada; (E.K.T.); (T.D.)
- Faculty of Pharmacy & Pharmaceutical Sciences, University of Alberta, Edmonton, AB T6G 2H7, Canada
- Department of Biomedical Engineering, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2V2, Canada
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Baddam P, Young D, Dunsmore G, Nie C, Eaton F, Elahi S, Jovel J, Adesida AB, Dufour A, Graf D. Nasal Septum Deviation as the Consequence of BMP-Controlled Changes to Cartilage Properties. Front Cell Dev Biol 2021; 9:696545. [PMID: 34249945 PMCID: PMC8265824 DOI: 10.3389/fcell.2021.696545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 05/24/2021] [Indexed: 11/29/2022] Open
Abstract
The nasal septum cartilage is a specialized hyaline cartilage important for normal midfacial growth. Abnormal midfacial growth is associated with midfacial hypoplasia and nasal septum deviation (NSD). However, the underlying genetics and associated functional consequences of these two anomalies are poorly understood. We have previously shown that loss of Bone Morphogenetic Protein 7 (BMP7) from neural crest (BMP7 ncko ) leads to midfacial hypoplasia and subsequent septum deviation. In this study we elucidate the cellular and molecular abnormalities underlying NSD using comparative gene expression, quantitative proteomics, and immunofluorescence analysis. We show that reduced cartilage growth and septum deviation are associated with acquisition of elastic cartilage markers and share similarities with osteoarthritis (OA) of the knee. The genetic reduction of BMP2 in BMP7 ncko mice was sufficient to rescue NSD and suppress elastic cartilage markers. To our knowledge this investigation provides the first genetic example of an in vivo cartilage fate switch showing that this is controlled by the relative balance of BMP2 and BMP7. Cellular and molecular changes similar between NSD and knee OA suggest a related etiology underlying these cartilage abnormalities.
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Affiliation(s)
- Pranidhi Baddam
- School of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Daniel Young
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Garett Dunsmore
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, AB, Canada
| | - Chunpeng Nie
- School of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Farah Eaton
- School of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Shokrollah Elahi
- School of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Juan Jovel
- Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | | | - Antoine Dufour
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Daniel Graf
- School of Dentistry, University of Alberta, Edmonton, AB, Canada
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Higashigaito K, Pfirrmann CW, Koch S, Graf D, Schweizer A, Rosskopf AB, Nanz D. Ligaments of the Scaphotrapeziotrapezoidal Joint: MR Anatomy in Asymptomatic and Symptomatic Patients. Semin Musculoskelet Radiol 2021. [DOI: 10.1055/s-0041-1731564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Roth DM, Baddam P, Lin H, Vidal-García M, Aponte JD, De Souza ST, Godziuk D, Watson AES, Footz T, Schachter NF, Egan SE, Hallgrímsson B, Graf D, Voronova A. The Chromatin Regulator Ankrd11 Controls Palate and Cranial Bone Development. Front Cell Dev Biol 2021; 9:645386. [PMID: 33996804 PMCID: PMC8117352 DOI: 10.3389/fcell.2021.645386] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/31/2021] [Indexed: 11/19/2022] Open
Abstract
Epigenetic and chromatin regulation of craniofacial development remains poorly understood. Ankyrin Repeat Domain 11 (ANKRD11) is a chromatin regulator that has previously been shown to control neural stem cell fates via modulation of histone acetylation. ANKRD11 gene variants, or microdeletions of the 16q24.3 chromosomal region encompassing the ANKRD11 gene, cause KBG syndrome, a rare autosomal dominant congenital disorder with variable neurodevelopmental and craniofacial involvement. Craniofacial abnormalities include a distinct facial gestalt, delayed bone age, tooth abnormalities, delayed fontanelle closure, and frequently cleft or submucosal palate. Despite this, the dramatic phenotype and precise role of ANKRD11 in embryonic craniofacial development remain unexplored. Quantitative analysis of 3D images of KBG syndromic subjects shows an overall reduction in the size of the middle and lower face. Here, we report that mice with heterozygous deletion of Ankrd11 in neural crest cells (Ankrd11nchet) display a mild midfacial hypoplasia including reduced midfacial width and a persistent open fontanelle, both of which mirror KBG syndrome patient facial phenotypes. Mice with a homozygous Ankrd11 deletion in neural crest cells (Ankrd11ncko) die at birth. They show increased severity of several clinical manifestations described for KBG syndrome, such as cleft palate, retrognathia, midfacial hypoplasia, and reduced calvarial growth. At E14.5, Ankrd11 expression in the craniofacial complex is closely associated with developing bony structures, while expression at birth is markedly decreased. Conditional deletion of Ankrd11 leads to a reduction in ossification of midfacial bones, with several ossification centers failing to expand and/or fuse. Intramembranous bones show features of delayed maturation, with bone remodeling severely curtailed at birth. Palatal shelves remain hypoplastic at all developmental stages, with a local reduction in proliferation at E13.5. Our study identifies Ankrd11 as a critical regulator of intramembranous ossification and palate development and suggests that Ankrd11nchet and Ankrd11ncko mice may serve as pre-clinical models for KBG syndrome in humans.
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Affiliation(s)
- Daniela Marta Roth
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Pranidhi Baddam
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Haiming Lin
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Marta Vidal-García
- Department of Cell Biology & Anatomy, Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Jose David Aponte
- Department of Cell Biology & Anatomy, Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Sarah-Thea De Souza
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Devyn Godziuk
- Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Adrianne Eve Scovil Watson
- Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Tim Footz
- Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Nathan F. Schachter
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Sean E. Egan
- Cell Biology Program, Hospital for Sick Children, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Benedikt Hallgrímsson
- Department of Cell Biology & Anatomy, Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Daniel Graf
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Anastassia Voronova
- Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
- Department of Cell Biology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
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Baddam P, Kung T, Adesida AB, Graf D. Histological and molecular characterization of the growing nasal septum in mice. J Anat 2021; 238:751-764. [PMID: 33043993 PMCID: PMC7855085 DOI: 10.1111/joa.13332] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 06/24/2020] [Revised: 08/14/2020] [Accepted: 09/18/2020] [Indexed: 12/20/2022] Open
Abstract
The nasal septum is a cartilaginous structure that serves as a pacemaker for the development of the midface. The septum is a hyaline cartilage which is surrounded by a perichondrium and epithelium. It remains cartilaginous anteriorly, but posteriorly it undergoes endochondral ossification to form the perpendicular plate of the ethmoid. Understanding of hyaline cartilage differentiation stems predominantly from investigations of growth plate cartilage. It is currently unclear if the morphological and molecular properties of the differentiating nasal septum align with what is known from the growth plate. In this study, we describe growth, molecular, and cellular characteristics of the nasal septum with reference to hyaline cartilage differentiation. The nasal septum grows asynchronous across its length with phases of rapid growth interrupted by more stagnant growth. Growth appears to be driven predominantly by acquisition of chondrocyte hypertrophy. Similarly, cellular differentiation is asynchronous, and differentiation observed in the anterior part precedes posterior differentiation. Overall, the nasal septum is structurally and molecularly heterogeneous. Early and extensive chondrocyte hypertrophy but no ossification is observed in the anterior septum. Onset of hypertrophic chondrocyte differentiation coincided with collagen fiber deposition along the perichondrium. Sox9, Col2, Col10, Mmp13, Sp7, and Runx2 expression was heterogeneous and did not always follow the expected pattern established from chondrocyte differentiation in the growth plate. The presence of hypertrophic chondrocytes expressing bone-related proteins early on in regions where the nasal septum does not ossify displays incongruities with current understanding of hyaline cartilage differentiation. Runx2, Collagen II, Collagen X, and Sp7 commonly used to mark distinct stages of chondrocyte maturation and early bone formation show wider expression than expected and do not align with expected cellular characteristics. Thus, the hyaline cartilage of the nasal septum is quite distinct from growth plate hyaline cartilage, and caution should be taken before assigning cartilage properties to less well-defined cartilage structures using these commonly used markers. Beyond the structural description of the nasal cartilage, this study also provides important information for cartilage tissue engineering when using nasal septal cartilage for tissue regeneration.
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Affiliation(s)
- Pranidhi Baddam
- School of DentistryFaculty of Medicine and DentistryUniversity of AlbertaEdmontonABCanada
| | - Tiffany Kung
- School of DentistryFaculty of Medicine and DentistryUniversity of AlbertaEdmontonABCanada
| | - Adetola B. Adesida
- Department of SurgeryFaculty of Medicine and DentistryUniversity of AlbertaEdmontonABCanada
| | - Daniel Graf
- School of DentistryFaculty of Medicine and DentistryUniversity of AlbertaEdmontonABCanada,Department of Medical GeneticsFaculty of Medicine and DentistryUniversity of AlbertaEdmontonABCanada
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Abstract
Craniofacial development, one of the most complex sequences of developmental events in embryology, features a uniquely transient, pluripotent stem cell-like population known as the neural crest (NC). Neural crest cells (NCCs) originate from the dorsal aspect of the neural tube and migrate along pre-determined routes into the developing branchial arches and frontonasal plate. The exceptional rates of proliferation and migration of NCCs enable their diverse contribution to a wide variety of craniofacial structures. Subsequent differentiation of these cells gives rise to cartilage, bones, and a number of mesenchymally-derived tissues. Deficiencies in any stage of differentiation can result in facial clefts and abnormalities associated with craniofacial syndromes. A small number of conserved signaling pathways are involved in controlling NC differentiation and craniofacial development. They are used in a reiterated fashion to help define precise temporospatial cell and tissue formation. Although many aspects of their cellular and molecular control have yet to be described, it is clear that together they form intricately integrated signaling networks required for spatial orientation and developmental stability and plasticity, which are hallmarks of craniofacial development. Mutations that affect the functions of these signaling pathways are often directly or indirectly identified in congenital syndromes. Clinical applications of NC-derived mesenchymal stem/progenitor cells, persistent into adulthood, hold great promise for tissue repair and regeneration. Realization of NCC potential for regenerative therapies motivates understanding of the intricacies of cell communication and differentiation that underlie the complexities of NC-derived tissues.
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Affiliation(s)
- Daniela Marta Roth
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, 7020N Katz Group Centre for Pharmacy & Health Research, 11361-87 Avenue, Edmonton, Alberta, AB T6G 2E1 Canada
| | - Francy Bayona
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, 7020N Katz Group Centre for Pharmacy & Health Research, 11361-87 Avenue, Edmonton, Alberta, AB T6G 2E1 Canada
| | - Pranidhi Baddam
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, 7020N Katz Group Centre for Pharmacy & Health Research, 11361-87 Avenue, Edmonton, Alberta, AB T6G 2E1 Canada
| | - Daniel Graf
- Alberta Dental Association & College Chair for Oral Health Research, School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, 7020N Katz Group Centre for Pharmacy & Health Research, 11361-87 Avenue, Edmonton, Alberta, AB T6G 2E1 Canada
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42
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Houg KP, Adanty K, MacGillivray SR, McAllister L, Levin L, Alexiou M, Graf D, Romanyk DL, Dennison CR. On the ability of experimental impact measures to predict tooth injuries in an ex vivo swine model. Dent Traumatol 2021; 37:464-473. [PMID: 33550707 DOI: 10.1111/edt.12645] [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: 06/21/2020] [Revised: 11/26/2020] [Accepted: 11/28/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND/AIM Impact to the orofacial region, in particular teeth, is a frequent incident leading to injury in many sports and can result in health and economic costs for the injured individual. The majority of previous work has applied synthetic models such as plaster or stone, to form analogs of relevant structures to study the potential for impact-induced injury. Biomechanical studies that have applied tissue models (animal or human) for the purpose of determining the biomechanical measures associated with dental injury are rare. The aim of this study was to apply a simple ex vivo model based on swine dentition to ascertain which of a select list of measurable quantities associated with impact mechanics could predict luxation and fracture of teeth due to impact. METHODS Mandibular central incisors of ex vivo swine dentitions were impacted using a linear drop tower with heights ranging from 1.20 m to 2.42 m. Seven mechanical predictors were assessed at impact and were then subjected to binary logistic regression techniques to determine which was the best predictor of luxations or fractures of the teeth. RESULTS Of the seven mechanical predictors, (1) the velocity of the impacting body (R2 = 0.477), (2) a proxy measure for the change in kinetic energy of the impacting body (R2 = 0.586), and (3) the approximate energy absorbed by the tissue (R2 = 0.722) were found to be statistically significantly different (p < .05), offering the greatest specificity as indicated by receiver operator characteristics. Other measures that are frequently used in impact mechanics, including peak linear acceleration and velocity change, were not statistically significant predictors of tooth injury. CONCLUSION Identifying mechanical predictors for dental injury of unprotected teeth provides a first step in understanding which aspects of an impact event attribute to dental injury and can lay the foundation for future studies that examine alteration in injury mechanics associated with protection devices.
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Affiliation(s)
- Kathryn P Houg
- Biomedical Instrumentation Lab, University of Alberta, Edmonton, Alberta, Canada.,Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Kevin Adanty
- Biomedical Instrumentation Lab, University of Alberta, Edmonton, Alberta, Canada.,Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Samantha R MacGillivray
- Biomedical Instrumentation Lab, University of Alberta, Edmonton, Alberta, Canada.,Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Lowell McAllister
- Biomedical Instrumentation Lab, University of Alberta, Edmonton, Alberta, Canada.,Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Liran Levin
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Maria Alexiou
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Daniel Graf
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Dan L Romanyk
- Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada.,Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Christopher R Dennison
- Biomedical Instrumentation Lab, University of Alberta, Edmonton, Alberta, Canada.,Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada
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Smeeton J, Natarajan N, Naveen Kumar A, Miyashita T, Baddam P, Fabian P, Graf D, Crump JG. Zebrafish model for spondylo-megaepiphyseal-metaphyseal dysplasia reveals post-embryonic roles of Nkx3.2 in the skeleton. Development 2021; 148:dev.193409. [PMID: 33462117 DOI: 10.1242/dev.193409] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 12/31/2020] [Indexed: 01/10/2023]
Abstract
The regulated expansion of chondrocytes within growth plates and joints ensures proper skeletal development through adulthood. Mutations in the transcription factor NKX3.2 underlie spondylo-megaepiphyseal-metaphyseal dysplasia (SMMD), which is characterized by skeletal defects including scoliosis, large epiphyses, wide growth plates and supernumerary distal limb joints. Whereas nkx3.2 knockdown zebrafish and mouse Nkx3.2 mutants display embryonic lethal jaw joint fusions and skeletal reductions, respectively, they lack the skeletal overgrowth seen in SMMD patients. Here, we report adult viable nkx3.2 mutant zebrafish displaying cartilage overgrowth in place of a missing jaw joint, as well as severe dysmorphologies of the facial skeleton, skullcap and spine. In contrast, cartilage overgrowth and scoliosis are absent in rare viable nkx3.2 knockdown animals that lack jaw joints, supporting post-embryonic roles for Nkx3.2. Single-cell RNA-sequencing and in vivo validation reveal increased proliferation and upregulation of stress-induced pathways, including prostaglandin synthases, in mutant chondrocytes. By generating a zebrafish model for the skeletal overgrowth defects of SMMD, we reveal post-embryonic roles for Nkx3.2 in dampening proliferation and buffering the stress response in joint-associated chondrocytes.
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Affiliation(s)
- Joanna Smeeton
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA,Columbia Stem Cell Initiative, Department of Rehabilitation and Regenerative Medicine, and Department of Genetics and Development, Columbia University Irving Medical Center, Columbia University, New York, NY 10032, USA
| | - Natasha Natarajan
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Arati Naveen Kumar
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Tetsuto Miyashita
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada,Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA
| | - Pranidhi Baddam
- Department of Dentistry, University of Alberta, Edmonton, Alberta T6G 2R3, Canada
| | - Peter Fabian
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Daniel Graf
- Department of Dentistry, University of Alberta, Edmonton, Alberta T6G 2R3, Canada,Department of Medical Genetics, University of Alberta, Edmonton, Alberta T6G 2R7, Canada
| | - J Gage Crump
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
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Maniv A, Reyes AP, Ramakrishna SK, Graf D, Huq A, Potashnikov D, Rivin O, Pesach A, Tao Q, Rosen J, Felner I, Caspi EN. Microscopic evidence for Mn-induced long range magnetic ordering in MAX phase compounds. J Phys Condens Matter 2021; 33:025803. [PMID: 32942268 DOI: 10.1088/1361-648x/abb998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Zero and low field nuclear magnetic resonance measurements have been performed on MAX phase samples (Cr1-x Mn x )2AC with A = Ge and Ga in order to obtain local microscopic information on the nature of magnetism in this system. Our results unambiguously provide evidence for the existence of long-range magnetic order in (Cr0.96Mn0.04)2GeC and for (Cr0.93Mn0.07)2GaC, but not for (Cr0.97Mn0.03)2GaC. We point to a possible dependence of long range magnetic order in these MAX phase compounds on the A atom.
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Affiliation(s)
- A Maniv
- Department of Physics, Nuclear Research Center-Negev, PO Box 9001, Beer Sheva 84190, Israel
- National High Magnetic Field Laboratory, Tallahassee, FL 32310, United States of America
| | - A P Reyes
- National High Magnetic Field Laboratory, Tallahassee, FL 32310, United States of America
| | - S K Ramakrishna
- National High Magnetic Field Laboratory, Tallahassee, FL 32310, United States of America
| | - D Graf
- National High Magnetic Field Laboratory, Tallahassee, FL 32310, United States of America
| | - A Huq
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
| | - D Potashnikov
- Faculty of Physics, Technion-Israeli Institute of Technology, Haifa 32000, Israel
- Israel Atomic Energy Commission, PO Box 7061, Tel-Aviv 61070, Israel
| | - O Rivin
- Department of Physics, Nuclear Research Center-Negev, PO Box 9001, Beer Sheva 84190, Israel
| | - A Pesach
- Department of Physics, Nuclear Research Center-Negev, PO Box 9001, Beer Sheva 84190, Israel
| | - Q Tao
- Thin Film Physics Division, Department of Physics, Chemistry, and Biology (IFM), Linkoping University, Linkoping, Sweden
| | - J Rosen
- Thin Film Physics Division, Department of Physics, Chemistry, and Biology (IFM), Linkoping University, Linkoping, Sweden
| | - I Felner
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - E N Caspi
- Department of Physics, Nuclear Research Center-Negev, PO Box 9001, Beer Sheva 84190, Israel
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Baddam P, Biancardi V, Roth DM, Eaton F, Thereza-Bussolaro C, Mandal R, Wishart DS, Barr A, MacLean J, Flores-Mir C, Pagliardini S, Graf D. Neural crest-specific deletion of Bmp7 leads to midfacial hypoplasia, nasal airway obstruction, and disordered breathing modelling Obstructive Sleep Apnea. Dis Model Mech 2021; 14:dmm.047738. [PMID: 33431521 PMCID: PMC7888714 DOI: 10.1242/dmm.047738] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 12/22/2020] [Indexed: 12/14/2022] Open
Abstract
Pediatric obstructive sleep apnea (OSA), a relatively common sleep-related breathing disorder (SRBD) affecting approximately 1-5% of children, is often caused by anatomical obstruction and/or collapse of the nasal and/or pharyngeal airways. The resulting sleep disruption and intermittent hypoxia lead to various systemic morbidities. Predicting the development of OSA from craniofacial features alone is currently not possible and a controversy remains if upper airway obstruction facilitates reduced midfacial growth or vice-versa. Currently, there is no rodent model that recapitulates both the development of craniofacial abnormalities and upper airway obstruction to address these questions. Here, we describe that mice with a neural crest-specific deletion of Bmp7 (Bmp7ncko) present with shorter, more acute angled cranial base, midfacial hypoplasia, nasal septum deviation, turbinate swelling and branching defects, and nasal airway obstruction. Interestingly, several of these craniofacial features develop after birth during periods of rapid midfacial growth and precede the development of an upper airway obstruction. We identified that in this rodent model, no single feature appeared to predict upper airway obstruction, but the sum of those features resulted in a reduced breathing frequency, apneas and overall reduced oxygen consumption. Metabolomics analysis of serum from peripheral blood identified increased levels of hydroxyproline, a metabolite upregulated under hypoxic conditions. As this model recapitulates many features observed in OSA, it offers unique opportunities for studying how upper airway obstruction affects breathing physiology and leads to systemic morbidities.
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Affiliation(s)
- Pranidhi Baddam
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Vivian Biancardi
- Department of Physiology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
- Equal contributions
| | - Daniela M Roth
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
- Equal contributions
| | - Farah Eaton
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Claudine Thereza-Bussolaro
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
- Department of Dentistry, Hospital dos Pinheiros, UNIFASIPE, Sinop, Mato Grosso, Brazil
| | - Rupasri Mandal
- The Metabolomics Innovation Centre, Department of Biological Sciences, Faculty of Science, University of Alberta, Edmonton, AB, Canada
| | - David S Wishart
- The Metabolomics Innovation Centre, Department of Biological Sciences, Faculty of Science, University of Alberta, Edmonton, AB, Canada
| | - Amy Barr
- Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Joanna MacLean
- Department of Pediatrics and the Women & Children's Health Research Institute, Faculty of Medicine and Dentistry, University of Alberta
- Stollery Children's Hospital; Edmonton, AB, Canada
| | - Carlos Flores-Mir
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Silvia Pagliardini
- Department of Physiology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Daniel Graf
- School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
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Campbell DJ, Collini J, Sławińska J, Autieri C, Wang L, Wang K, Wilfong B, Eo YS, Neves P, Graf D, Rodriguez EE, Butch NP, Nardelli MB, Paglione J. Topologically driven linear magnetoresistance in helimagnetic FeP. npj Quantum Inf 2021; 6:10.1038/s41535-021-00337-2. [PMID: 37731847 PMCID: PMC10510734 DOI: 10.1038/s41535-021-00337-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 03/24/2021] [Indexed: 09/22/2023]
Abstract
The helimagnet FeP is part of a family of binary pnictide materials with the MnP-type structure, which share a nonsymmorphic crystal symmetry that preserves generic band structure characteristics through changes in elemental composition. It shows many similarities, including in its magnetic order, to isostructural CrAs and MnP, two compounds that are driven to superconductivity under applied pressure. Here we present a series of high magnetic field experiments on high-quality single crystals of FeP, showing that the resistance not only increases without saturation by up to several hundred times its zero-field value by 35 T, but that it also exhibits an anomalously linear field dependence over the entire range when the field is aligned precisely along the crystallographic c-axis. A close comparison of quantum oscillation frequencies to electronic structure calculations links this orientation to a semi-Dirac point in the band structure, which disperses linearly in a single direction in the plane perpendicular to field, a symmetry-protected feature of this entire material family. We show that the two striking features of magnetoresistance-large amplitude and linear field dependence-arise separately in this system, with the latter likely due to a combination of ordered magnetism and topological band structure.
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Affiliation(s)
- D. J. Campbell
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
- Present address: LNCMI, CNRS, EMFL, Université Grenoble Alpes, INSA Toulouse, Université Toulouse Paul Sabatier, Grenoble, France
| | - J. Collini
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
- NIST Center for Neutron Research, NIST, Gaithersburg, MD, USA
| | - J. Sławińska
- Department of Physics, University of North Texas, Denton, TX, USA
- Present address: Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - C. Autieri
- International Research Centre Magtop, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
- Consiglio Nazionale delle Ricerche CNR-SPIN, UOS Salerno, Fisciano, Salerno, Italy
| | - L. Wang
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
| | - K. Wang
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
| | - B. Wilfong
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
- Department of Chemistry, University of Maryland, College Park, MD, USA
| | - Y. S. Eo
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
| | - P. Neves
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
- NIST Center for Neutron Research, NIST, Gaithersburg, MD, USA
| | - D. Graf
- National High Magnetic Field Laboratory, Tallahassee, FL, USA
| | - E. E. Rodriguez
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
- Department of Chemistry, University of Maryland, College Park, MD, USA
| | - N. P. Butch
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
- NIST Center for Neutron Research, NIST, Gaithersburg, MD, USA
| | | | - J. Paglione
- Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA
- Canadian Institute for Advanced Research, Toronto, ON, Canada
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Graf D, Ochsenfeld C. A range-separated generalized Kohn-Sham method including a long-range nonlocal random phase approximation correlation potential. J Chem Phys 2020; 153:244118. [PMID: 33380112 DOI: 10.1063/5.0031310] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Based on our recently published range-separated random phase approximation (RPA) functional [Kreppel et al., "Range-separated density-functional theory in combination with the random phase approximation: An accuracy benchmark," J. Chem. Theory Comput. 16, 2985-2994 (2020)], we introduce self-consistent minimization with respect to the one-particle density matrix. In contrast to the range-separated RPA methods presented so far, the new method includes a long-range nonlocal RPA correlation potential in the orbital optimization process, making it a full-featured variational generalized Kohn-Sham (GKS) method. The new method not only improves upon all other tested RPA schemes including the standard post-GKS range-separated RPA for the investigated test cases covering general main group thermochemistry, kinetics, and noncovalent interactions but also significantly outperforms the popular G0W0 method in estimating the ionization potentials and fundamental gaps considered in this work using the eigenvalue spectra obtained from the GKS Hamiltonian.
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Affiliation(s)
- Daniel Graf
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), D-81377 Munich, Germany
| | - Christian Ochsenfeld
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), D-81377 Munich, Germany
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Glasbrenner M, Graf D, Ochsenfeld C. Efficient Reduced-Scaling Second-Order Møller-Plesset Perturbation Theory with Cholesky-Decomposed Densities and an Attenuated Coulomb Metric. J Chem Theory Comput 2020; 16:6856-6868. [PMID: 33074664 DOI: 10.1021/acs.jctc.0c00600] [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] [Indexed: 11/28/2022]
Abstract
We present a novel, highly efficient method for the computation of second-order Møller-Plesset perturbation theory (MP2) correlation energies, which uses the resolution of the identity (RI) approximation and local molecular orbitals obtained from a Cholesky decomposition of pseudodensity matrices (CDD), as in the RI-CDD-MP2 method developed previously in our group [Maurer, S. A.; Clin, L.; Ochsenfeld, C. J. Chem. Phys. 2014, 140, 224112]. In addition, we introduce an attenuated Coulomb metric and subsequently redesign the RI-CDD-MP2 method in order to exploit the resulting sparsity in the three-center integrals. Coulomb and exchange energy contributions are computed separately using specialized algorithms. A simple, yet effective integral screening protocol based on Schwarz estimates is used for the MP2 exchange energy. The Coulomb energy computation and the preceding transformations of the three-center integrals are accelerated using a modified version of the natural blocking approach [Jung, Y.; Head-Gordon, M. Phys. Chem. Chem. Phys. 2006, 8, 2831-2840]. Effective subquadratic scaling for a wide range of molecule sizes is demonstrated in test calculations in conjunction with a low prefactor. The method is shown to enable cost-efficient MP2 calculations on large molecular systems with several thousand basis functions.
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Affiliation(s)
- Michael Glasbrenner
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Butenandtstrasse 7, 81377 Munich, Germany
| | - Daniel Graf
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Butenandtstrasse 7, 81377 Munich, Germany
| | - Christian Ochsenfeld
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich (LMU), Butenandtstrasse 7, 81377 Munich, Germany
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Graf D, Yanagida T, Maschler A, Spiel C. A tool for investigating the differential functions of aggressive behavior in the face-to-face and cyber context: Extending the Cyber-Aggression Typology Questionnaire. Aggress Behav 2020; 46:380-390. [PMID: 32383267 PMCID: PMC7496625 DOI: 10.1002/ab.21894] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 04/07/2020] [Accepted: 04/20/2020] [Indexed: 12/25/2022]
Abstract
Aggressive behavior in the face‐to‐face and cyber contexts is driven by underlying aggression (i.e., functions of aggressive behavior). Common theories of aggression distinguish between reactive (e.g., rage) and proactive (e.g., seeking to achieve power and affiliation) aggression. However, according to the quadripartite violence typology, this distinction conflates aspects of motivational valence with self‐regulatory processes. The Cyber‐Aggression Typology Questionnaire (CATQ; Runions et al., 2017, Aggress Behav, 43(1), pp. 74–84) overcomes this weakness by identifying four types of cyber‐aggression (impulsive‐aversive/rage, controlled‐aversive/revenge, controlled‐appetitive/reward, and impulsive‐appetitive/recreation cyber‐aggression). However, the CATQ only considers aggression in cyberspace. We extended the CATQ to the face‐to‐face context by developing a corresponding Face‐to‐Face Aggression Typology Questionnaire (FATQ). The aim of this study was to investigate factorial and convergent validity and metric measurement invariance between four‐factorial cyber and face‐to‐face aggression. In total, 587 students from six Austrian universities filled out the CATQ, the FATQ, and additional scales during regular university lectures to examine convergent validity. Confirmatory factor analysis supported the four‐factor structure of both questionnaires, after excluding inconclusive items from the impulsive‐aversive/rage subscale of the FATQ. These items were also removed from the CATQ to obtain two symmetric questionnaires. Metric measurement invariance between the CATQ and the FATQ was confirmed. Convergent validity was largely observed. Our results support an extended four‐factor model of aggression. Having two parallel questionnaires, the FATQ and CATQ, enables future studies to investigate commonalities and differences in underlying drivers of aggressive behavior in the cyber and face‐to‐face contexts.
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Affiliation(s)
- Daniel Graf
- Department of Developmental and Educational Psychology, Faculty of PsychologyUniversity of Vienna Vienna Austria
| | - Takuya Yanagida
- Department of Developmental and Educational Psychology, Faculty of PsychologyUniversity of Vienna Vienna Austria
| | - Albert Maschler
- Department of Developmental and Educational Psychology, Faculty of PsychologyUniversity of Vienna Vienna Austria
| | - Christiane Spiel
- Department of Developmental and Educational Psychology, Faculty of PsychologyUniversity of Vienna Vienna Austria
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Miyashita T, Baddam P, Smeeton J, Oel AP, Natarajan N, Gordon B, Palmer AR, Crump JG, Graf D, Allison WT. nkx3.2 mutant zebrafish accommodate jaw joint loss through a phenocopy of the head shapes of Paleozoic jawless fish. J Exp Biol 2020; 223:jeb216945. [PMID: 32527964 PMCID: PMC10668335 DOI: 10.1242/jeb.216945] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 06/01/2020] [Indexed: 12/11/2022]
Abstract
The vertebrate jaw is a versatile feeding apparatus. To function, it requires a joint between the upper and lower jaws, so jaw joint defects are often highly disruptive and difficult to study. To describe the consequences of jaw joint dysfunction, we engineered two independent null alleles of a single jaw joint marker gene, nkx3.2, in zebrafish. These mutations caused zebrafish to become functionally jawless via fusion of the upper and lower jaw cartilages (ankylosis). Despite lacking jaw joints, nkx3.2 mutants survived to adulthood and accommodated this defect by: (a) having a remodeled skull with a fixed open gape, reduced snout and enlarged branchial region; and (b) performing ram feeding in the absence of jaw-generated suction. The late onset and broad extent of phenotypic changes in the mutants suggest that modifications to the skull are induced by functional agnathia, secondarily to nkx3.2 loss of function. Interestingly, nkx3.2 mutants superficially resemble ancient jawless vertebrates (anaspids and furcacaudiid thelodonts) in overall head shape. Because no homology exists in individual skull elements between these taxa, the adult nkx3.2 phenotype is not a reversal but rather a convergence due to similar functional requirements of feeding without moveable jaws. This remarkable analogy strongly suggests that jaw movements themselves dramatically influence the development of jawed vertebrate skulls. Thus, these mutants provide a unique model with which to: (a) investigate adaptive responses to perturbation in skeletal development; (b) re-evaluate evolutionarily inspired interpretations of phenocopies generated by gene knockdowns and knockouts; and (c) gain insight into feeding mechanics of the extinct agnathans.
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Affiliation(s)
- Tetsuto Miyashita
- Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada T6G 2E9
| | - Pranidhi Baddam
- Department of Dentistry, University of Alberta, Edmonton, AB, Canada T6G 2R3
| | - Joanna Smeeton
- Department of Stem Cell Biology and Regenerative Medicine, W. M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - A Phil Oel
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada T6G 2E9
- Developmental Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Natasha Natarajan
- Department of Stem Cell Biology and Regenerative Medicine, W. M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Brogan Gordon
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada T6G 2E9
| | - A Richard Palmer
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada T6G 2E9
| | - J Gage Crump
- Department of Stem Cell Biology and Regenerative Medicine, W. M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Daniel Graf
- Department of Dentistry, University of Alberta, Edmonton, AB, Canada T6G 2R3
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada T6G 2R7
| | - W Ted Allison
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada T6G 2E9
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada T6G 2R7
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