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Bjerager J, Magnø M, Chen X, Belmouhand M, Aass HCD, Reppe S, Heegaard S, Larsen M, Utheim TP. Heritability of tear fluid cytokines in healthy twins. Ocul Surf 2024; 32:145-153. [PMID: 38387783 DOI: 10.1016/j.jtos.2024.02.005] [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: 11/28/2023] [Revised: 02/17/2024] [Accepted: 02/19/2024] [Indexed: 02/24/2024]
Abstract
PURPOSE Ocular surface disease is common and it is associated with elevated concentration levels of cytokines in tear fluid. Studies of the normal variation in tear fluid inflammatory markers are lacking. New knowledge may help guide research into ocular surface disease biomarkers and therapeutics. METHODS In this prospective twin cohort study, healthy individuals were recruited from a population-based registry. Tear fluid was collected with the Schirmer test strips was submerged in phosphate buffered saline and stored at -80° before undergoing 27-cytokine multiplex immunoassay analysis. Broad-sense heritability (h2) of cytokine concentrations was analyzed. RESULTS 90 participants (23 monozygotic and 22 dizygotic twin pairs) were included. Data availability allowed for heritability analysis of 15 cytokines, and a h2 >50% was seen for 10 cytokines. A statistical power of >80% was achieved for heritability analyses of the cytokines interferon gamma induced protein 10 (h2 = 94.8%), eotaxin (89.8%), interleukin 7 (86.6%), interleukin 1β (82.2%) and monocyte chemoattractant protein 1 (68.2%). CONCLUSIONS The tear fluid concentration of several analyzed cytokines was found to be highly heritable. A considerable amount of the inter-individual variation observed for the concentration of certain tear fluid cytokines can be linked to hereditary factors that cannot easily be modified by changing factors in the environment of patients. This suggests that a higher success in ocular surface disease drug discovery may be anticipated for drugs that have targets in specific populations, and points to the importance of emphasizing known preventive measures of ocular surface disease and examinations of close relatives of patients with ocular surface disease, such as dry eye disease.
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Affiliation(s)
- Jakob Bjerager
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark.
| | - Morten Magnø
- Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway; Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Xiangjun Chen
- Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway; Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | | | | | - Sjur Reppe
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway; Department of Plastic and Reconstructive Surgery, Oslo University Hospital, Oslo, Norway; Unger-Vetlesen Institute, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Steffen Heegaard
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Tor P Utheim
- Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway; Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway; Department of Plastic and Reconstructive Surgery, Oslo University Hospital, Oslo, Norway
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Altrieth A, Kenney J, Nelson D, Suarez E, Gellatly V, Gabunia S, Larsen M. Single-Cell Transcriptomic Analysis of Salivary Gland Endothelial Cells. J Dent Res 2024; 103:269-278. [PMID: 38411696 PMCID: PMC10985389 DOI: 10.1177/00220345231219987] [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] [Indexed: 02/28/2024] Open
Abstract
Vascular endothelial cells have important tissue-specific functions in fibrosis and regeneration. In the salivary gland, endothelial cells are required for proper development, but their roles within adult glands are largely unknown. To identify ligand-receptor interactions between endothelial cells and other cell types that may be important during fibrosis and regeneration, we used a reversible ductal ligation injury. To induce injury, a clip was applied to the primary ducts for 14 d, and to induce a regenerative response, the clip was subsequently removed for 5 d. To identify endothelial cell-produced factors, we used single-cell RNA sequencing of stromal-enriched cells from adult female submandibular and sublingual salivary glands. Transcriptional profiles of homeostatic salivary gland endothelial cells were compared to endothelial cells of other organs. Salivary gland endothelial cells expressed many unique genes and displayed the highest overlap in gene expression with other fenestrated endothelial cells from the colon, small intestine, and kidney. Comparison of the 14-d ligated, mock-ligated, and 5-d deligated stromal-enriched transcripts and lineage tracing revealed that endothelial cells retain their identity following ligation and recovery from injury. CellChat and NATMI were used to predict changes in ligand-receptor interactions from endothelial cells to other cells in response to ligation and deligation. CellChat and NATMI predicted that after ligation, interactions with fibroblasts, epithelial cells, and glial cells were increased, and following deligation, interactions with pericyte, glia, fibroblasts, and immune cells were increased. Some of the highest-ranked interactions predicted in ligated compared to mock endothelial cells were between glial cells via Col4a2-Cd93 and Jag2-Notch1, as well as epithelial cells via Pecam1-Cd38, while in deligated compared to ligated endothelial cells, the top interactions were between fibroblasts via Ntf3-Ntrk2, glial cells via Hspg2-Itgb1, and pericytes via Jam2-F11r. Understanding salivary gland endothelial cell signaling will inform future endothelial cell-based regenerative therapies.
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Affiliation(s)
- A.L. Altrieth
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
- Molecular, Cellular, Developmental, and Neural Biology Graduate Program, Department of Biological Sciences, University at Albany, State University of New York, Albany, NY, USA
- Department of Pathology & Laboratory Medicine, The University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC 27599, USA
| | - J. Kenney
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
| | - D.A. Nelson
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
| | - E.G. Suarez
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
| | - V. Gellatly
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
- Molecular, Cellular, Developmental, and Neural Biology Graduate Program, Department of Biological Sciences, University at Albany, State University of New York, Albany, NY, USA
| | - S. Gabunia
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
| | - M. Larsen
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
- Molecular, Cellular, Developmental, and Neural Biology Graduate Program, Department of Biological Sciences, University at Albany, State University of New York, Albany, NY, USA
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Forshaw TRJ, Solborg Bjerrum S, Larsen M. Valsalva retinopathy in the absence of Valsalva manoeuvre: A variant of haemorrhagic unilateral retinopathy. Acta Ophthalmol 2024; 102:122-123. [PMID: 37772421 DOI: 10.1111/aos.15781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/06/2023] [Accepted: 09/18/2023] [Indexed: 09/30/2023]
Affiliation(s)
| | | | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet-Glostrup, Glostrup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Kast K, Rhiem K, Larsen M, Wappenschmidt B, Schmutzler R. Phenotype analysis of families with TP53 germline variants at the Center for Familial Breast and Ovarian Cancer, Cologne. Cancer Med 2024; 13:e6920. [PMID: 38230850 PMCID: PMC10905677 DOI: 10.1002/cam4.6920] [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: 05/31/2023] [Revised: 12/07/2023] [Accepted: 12/31/2023] [Indexed: 01/18/2024] Open
Abstract
PURPOSE Tumor protein p53 (TP53) pathogenic variant (PV) carriers are identified during genetic testing for hereditary causes of cancer. PVs in TP53 are associated with the Li-Fraumeni syndrome (LFS), and thus, surveillance and preventive measures are important for TP53 PV carriers. However, the penetrance of TP53 PVs can be low if the Chompret criteria are not fulfilled. In this study, we compared the phenotypic characteristics of families that did and did not fulfill the LFS criteria according to Chompret. METHODS The German Consortium for Hereditary Breast and Ovarian Cancer (GC-HBOC) database was used to identify index patients with a likely pathogenic/pathogenic TP53 variant and their family members. The study investigated the type of variant, pedigree, age of onset, number of primary tumors, and histological type of BC. RESULTS TP53 PV were present in the index cases of 35 families, 57% (20/35) of which fulfilled the Chompret criteria. The median age of onset at first BC diagnosis was lower in families that fulfilled the Chompret criteria compared to those who did not. Four of all diseased individuals were minors (4%; 4/105) when malignancy was first diagnosed. Sarcomas and brain tumors occurred in 10% (10/105) and in 7% (7/105) of all diseased persons, respectively. BC was the most frequently occurring first tumor (60%; 62/105) and additional malignancy (45%; 20/44) in this cohort. Subsequent malignancies developed in 31% (20/65) of the individuals who fulfilled the Chompret criteria compared with 15% (6/40) of those who did not. CONCLUSION The tumor spectrum and age of onset found in this study showed that tumors other than BC had low disease penetrance in TP53 PV carriers identified using the GC-HBOC criteria for genetic testing.
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Affiliation(s)
- K. Kast
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical FacultyUniversity Hospital CologneCologneGermany
| | - K. Rhiem
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical FacultyUniversity Hospital CologneCologneGermany
| | - M. Larsen
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical FacultyUniversity Hospital CologneCologneGermany
| | - B. Wappenschmidt
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical FacultyUniversity Hospital CologneCologneGermany
| | - R. Schmutzler
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical FacultyUniversity Hospital CologneCologneGermany
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Feenstra HMA, van Dijk EHC, Cheung CMG, Ohno-Matsui K, Lai TYY, Koizumi H, Larsen M, Querques G, Downes SM, Yzer S, Breazzano MP, Subhi Y, Tadayoni R, Priglinger SG, Pauleikhoff LJB, Lange CAK, Loewenstein A, Diederen RMH, Schlingemann RO, Hoyng CB, Chhablani JK, Holz FG, Sivaprasad S, Lotery AJ, Yannuzzi LA, Freund KB, Boon CJF. Central serous chorioretinopathy: An evidence-based treatment guideline. Prog Retin Eye Res 2024:101236. [PMID: 38301969 DOI: 10.1016/j.preteyeres.2024.101236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/30/2023] [Accepted: 01/02/2024] [Indexed: 02/03/2024]
Abstract
Central serous chorioretinopathy (CSC) is a relatively common disease that causes vision loss due to macular subretinal fluid leakage and is often associated with reduced vision-related quality of life. In CSC, the leakage of subretinal fluid through defects in the retinal pigment epithelial layer's outer blood-retina barrier appears to occur secondary to choroidal abnormalities and dysfunction. The treatment of CSC is currently the subject of controversy, although recent data obtained from several large randomized controlled trials provide a wealth of new information that can be used to establish a treatment algorithm. Here, we provide a comprehensive overview of our current understanding regarding the pathogenesis of CSC, current therapeutic strategies, and an evidence-based treatment guideline for CSC. In acute CSC, treatment can often be deferred for up to 3-4 months after diagnosis; however, early treatment with either half-dose or half-fluence photodynamic therapy (PDT) combined with the photosensitive dye verteporfin may be beneficial in selected cases. In chronic CSC, half-dose or half-fluence PDT, which targets the abnormal choroid, should be considered the preferred treatment. If PDT is unavailable, chronic CSC with focal, non-central leakage on angiography may be treated using conventional laser photocoagulation. CSC with concurrent macular neovascularization should be treated with half-dose/half-fluence PDT and/or intravitreal injections of an anti-vascular endothelial growth factor compound. Given the current shortage of verteporfin and the paucity of evidence supporting the efficacy of other treatment options, future studies-ideally, well-designed randomized controlled trials-are needed in order to evaluate new treatment options for CSC.
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Affiliation(s)
- Helena M A Feenstra
- Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands
| | - Elon H C van Dijk
- Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands
| | - Chui Ming Gemmy Cheung
- Singapore Eye Research Institution, Singapore National Eye Centre, Singapore; Duke-NUS Medical School, National University of Singapore, Singapore
| | - Kyoko Ohno-Matsui
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Timothy Y Y Lai
- Department of Ophthalmology & Visual Sciences, The Chinese University of Hong Kong, Hong Kong Eye Hospital, Kowloon, Hong Kong
| | - Hideki Koizumi
- Department of Ophthalmology, Graduate School of Medicine, University of the Ryukyus, Nishihara, Japan
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark; Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Giuseppe Querques
- Department of Ophthalmology, University Vita-Salute, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Susan M Downes
- Oxford Eye Hospital, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, UK; Nuffield Laboratory of Ophthalmology, Nuffield Department of Clinical Neuroscience, University of Oxford, Oxford, UK
| | - Suzanne Yzer
- Department of Ophthalmology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Mark P Breazzano
- Retina-Vitreous Surgeons of Central New York, Liverpool, NY, USA; Department of Ophthalmology & Visual Sciences, State University of New York Upstate Medical University, Syracuse, NY, USA
| | - Yousif Subhi
- Department of Ophthalmology, Rigshospitalet, Copenhagen, Denmark; Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Ramin Tadayoni
- Ophthalmology Department, AP-HP, Hôpital Lariboisière, Université de Paris, Paris, France
| | - Siegfried G Priglinger
- Department of Ophthalmology, Hospital of the Ludwig-Maximilians-University, Munich, Germany
| | - Laurenz J B Pauleikhoff
- Department of Ophthalmology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands; Eye Center, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Clemens A K Lange
- Department of Ophthalmology, St. Franziskus Hospital, Muenster, Germany
| | - Anat Loewenstein
- Division of Ophthalmology, Tel Aviv Medical Center, Tel Aviv University, Tel Aviv, Israel
| | - Roselie M H Diederen
- Department of Ophthalmology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands
| | - Reinier O Schlingemann
- Department of Ophthalmology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands; Ocular Angiogenesis Group, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, Amsterdam, the Netherlands; Department of Ophthalmology, University of Lausanne, Jules-Gonin Eye Hospital, Fondation Asile des Aveugles, Lausanne, Switzerland
| | - Carel B Hoyng
- Department of Ophthalmology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Jay K Chhablani
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Frank G Holz
- Department of Ophthalmology, University of Bonn, Bonn, Germany
| | - Sobha Sivaprasad
- NIHR Biomedical Research Centre, Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - Andrew J Lotery
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Lawrence A Yannuzzi
- Vitreous Retina Macula Consultants of New York, New York, NY, USA; LuEsther T. Mertz Retinal Research Center, Manhattan Eye, Ear, and Throat Hospital, New York, NY, USA; Department of Ophthalmology, New York University Grossman School of Medicine, New York, USA; Department of Ophthalmology, Manhattan Eye, Ear and Throat Hospital, New York, NY, USA
| | - K Bailey Freund
- Vitreous Retina Macula Consultants of New York, New York, NY, USA; Department of Ophthalmology, New York University School of Medicine, New York, NY, USA
| | - Camiel J F Boon
- Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands; Department of Ophthalmology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands.
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Bjørnsbo KS, Brøns C, Aadahl M, Kampmann FB, Friis Bryde Nielsen C, Lundbergh B, Wibaek R, Kårhus LL, Madsen AL, Hansen CS, Nørgaard K, Jørgensen NR, Suetta C, Kjaer M, Grarup N, Kanters J, Larsen M, Køber L, Kofoed KF, Loos R, Hansen T, Linneberg A, Vaag A. Protocol for the combined cardiometabolic deep phenotyping and registry-based 20-year follow-up study of the Inter99 cohort. BMJ Open 2024; 14:e078501. [PMID: 38286704 PMCID: PMC10826573 DOI: 10.1136/bmjopen-2023-078501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 01/03/2024] [Indexed: 01/31/2024] Open
Abstract
INTRODUCTION The population-based Inter99 cohort has contributed extensively to our understanding of effects of a systematic screening and lifestyle intervention, as well as the multifactorial aetiology of type 2 diabetes (T2D) and cardiovascular disease. To understand causes, trajectories and patterns of early and overt cardiometabolic disease manifestations, we will perform a combined clinical deep phenotyping and registry follow-up study of the now 50-80 years old Inter99 participants. METHODS AND ANALYSIS The Inter99 cohort comprises individuals aged 30-60 years, who lived in a representative geographical area of greater Copenhagen, Denmark, in 1999. Age-stratified and sex-stratified random subgroups were invited to participate in either a lifestyle intervention (N=13 016) or questionnaires (N=5264), while the rest served as a reference population (N=43 021). Of the 13 016 individuals assigned to the lifestyle intervention group, 6784 (52%) accepted participation in a baseline health examination in 1999, including screening for cardiovascular risk factors and prediabetic conditions. In total, 6004 eligible participants, who participated in the baseline examination, will be invited to participate in the deep phenotyping 20-year follow-up clinical examination including measurements of anthropometry, blood pressure, arterial stiffness, cardiometabolic biomarkers, coronary artery calcification, heart rate variability, heart rhythm, liver stiffness, fundus characteristics, muscle strength and mass, as well as health and lifestyle questionnaires. In a subsample, 10-day monitoring of diet, physical activity and continuous glucose measurements will be performed. Fasting blood, urine and faecal samples to be stored in a biobank. The established database will form the basis of multiple analyses. A main purpose is to investigate whether low birth weight independent of genetics, lifestyle and glucose tolerance predicts later common T2D cardiometabolic comorbidities. ETHICS AND DISSEMINATION The study was approved by the Medical Ethics Committee, Capital Region, Denmark (H-20076231) and by the Danish Data Protection Agency through the Capital Region of Denmark's registration system (P-2020-1074). Informed consent will be obtained before examinations. Findings will be disseminated in peer-reviewed journals, at conferences and via presentations to stakeholders, including patients and public health policymakers. TRIAL REGISTRATION NUMBER NCT05166447.
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Affiliation(s)
- Kirsten Schroll Bjørnsbo
- Center for Clinical Research and Prevention, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | | | - Mette Aadahl
- Center for Clinical Research and Prevention, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Freja Bach Kampmann
- Center for Clinical Research and Prevention, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Camilla Friis Bryde Nielsen
- Center for Clinical Research and Prevention, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Bjørn Lundbergh
- Center for Clinical Research and Prevention, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | | | - Line Lund Kårhus
- Center for Clinical Research and Prevention, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Anja Lykke Madsen
- Center for Clinical Research and Prevention, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | | | - Kirsten Nørgaard
- Steno Diabetes Center Copenhagen, Herlev, Denmark
- Department of Clinical Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Niklas Rye Jørgensen
- Department of Clinical Biochemistry, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Charlotte Suetta
- Institute of Sports Medicine, Department of Orthopedic Surgery and Department of Geriatrics and Palliative Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Michael Kjaer
- Institute of Sports Medicine, Department of Orthopedic Surgery and Department of Geriatrics and Palliative Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Niels Grarup
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen Faculty of Health and Medical Sciences, Copenhagen, Denmark
| | - Jørgen Kanters
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen Faculty of Health and Medical Sciences, Copenhagen, Denmark
- Center of Physiological Research, University of California, San Francisco, CA, USA
| | - Michael Larsen
- Department of Ophthalmology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Lars Køber
- Department of Cardiology and Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Klaus Fuglsang Kofoed
- Department of Clinical Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Cardiology and Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Ruth Loos
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen Faculty of Health and Medical Sciences, Copenhagen, Denmark
| | - Torben Hansen
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen Faculty of Health and Medical Sciences, Copenhagen, Denmark
| | - Allan Linneberg
- Center for Clinical Research and Prevention, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark
- Department of Clinical Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Allan Vaag
- Steno Diabetes Center Copenhagen, Herlev, Denmark
- Lund University Diabetes Center, Malmö, Sweden
- Department of Endocrinology, Skåne University Hospital, Malmö, Sweden
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Petersen SD, Belmouhand M, Hertz JM, Fagerberg C, Brasch-Andersen C, Grauslund J, Munier FL, Larsen M. Frail inner limiting membrane maculopathy suggested to describe a new retinal Alport-like condition with two variants in three generations of females. Ophthalmic Genet 2024:1-8. [PMID: 38197426 DOI: 10.1080/13816810.2023.2294844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 12/09/2023] [Indexed: 01/11/2024]
Abstract
BACKGROUND We report a three-generation family with isolated Alport-like retinal abnormalities in the absence of lenticonus, hearing loss, kidney disease, and detectable molecular genetic defects in known Alport-related genes. METHODS Clinical examination includes ocular biomicroscopy, fundus photography, optical coherence tomography, dipstick urinalysis, serum creatinine assessment, and molecular genetic analysis. RESULTS The proband, her mother, and her maternal grandmother had normal best-corrected visual acuity and normal visual fields in both eyes. The macula presented a petaloid stair-case profile with scarce vessels in both eyes of the proband and a flat temporal macula lacking a foveal avascular zone in her mother and her grandmother. No family member had renal symptoms, unexplained subnormal hearing, or lenticonus. Sequencing and MLPA found no defect in COL4A3, COL4A4, and COL4A5. Common SNPs around the genes ± 1Mb showed no segregation. Furthermore, none of the variants shared between the affected individuals in genes from a gene panel of genes relevant for ophthalmopathy nor whole exome- and genome sequencing explained the phenotype. CONCLUSION A new condition with two retinal Alport-like phenotypes was found. No abnormalities of the kidneys and lens were found, neither abnormalities of the type IV collagen genes related to Alport syndrome. Homology with retinal abnormalities seen in patients after surgical removal of the inner limiting membrane of the retina suggests that this is where the defect is located. We therefore suggest that the new retinal phenotypes and similar phenotypes can be described with the new definition "frail inner limiting membrane maculopathy."
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Affiliation(s)
- Sekita Dalsgård Petersen
- Faculty of Health and Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Ophthalmology, Rigshospitalet, Copenhagen, Denmark
| | - Mohamed Belmouhand
- Faculty of Health and Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Ophthalmology, Rigshospitalet, Copenhagen, Denmark
| | - Jens Michael Hertz
- Department of Clinical Research, Faculty of Health Science, University of Southern Denmark, Odense, Denmark
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - Christina Fagerberg
- Department of Clinical Research, Faculty of Health Science, University of Southern Denmark, Odense, Denmark
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - Charlotte Brasch-Andersen
- Department of Clinical Research, Faculty of Health Science, University of Southern Denmark, Odense, Denmark
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - Jakob Grauslund
- Department of Clinical Research, Faculty of Health Science, University of Southern Denmark, Odense, Denmark
- Department of Ophthalmology, Vestfold University Trust, Tønsberg, Norway
- Department of Ophthalmology, Odense University Hospital, Odense, Denmark
| | - Francis L Munier
- Jules-Gonin Eye Hospital, Fondation Asile des Aveugles, University of Lausanne, Lausanne, Switzerland
| | - Michael Larsen
- Faculty of Health and Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Ophthalmology, Rigshospitalet, Copenhagen, Denmark
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8
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Zhu L, Munch IC, Pedersen CET, Stokholm J, Bønnelykke K, Chawes B, Carlsson CJ, Schoos AMM, Larsen M, Bisgaard H, Brustad N. Associations of pre- and postnatal exposures with optic nerve status in young adults. Acta Ophthalmol 2023; 101:737-746. [PMID: 36899496 DOI: 10.1111/aos.15657] [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: 09/28/2022] [Revised: 01/30/2023] [Accepted: 02/26/2023] [Indexed: 03/12/2023]
Abstract
PURPOSE We aimed to explore the effect of multiple pre- and postnatal exposures on optic nerve status in young adults due to this critical period for development. METHODS We analysed peripapillary retinal nerve fibre layer (RNFL) status and macular thickness at age 18 years in the Copenhagen Prospective Studies on Asthma in Childhood 2000 (COPSAC2000 ) cohort in relation to several exposures. RESULTS Of the 269 participants (median (IQR) age, 17.6 (0.6) years; 124 boys), 60 participants whose mothers had smoked during pregnancy had a thinner RNFL: adjusted mean difference -4.6 μm (95% CI -7.7; -1.5 μm, p = 0.004) compared with participants whose mothers had not smoked during pregnancy. A total of 30 participants who were exposed to tobacco smoke both during foetal life and childhood had thinner RNFL: -9.6 μm (-13.4; -5.8 μm, p < 0.001). Smoking during pregnancy was also associated with a macular thickness deficit: -4.7 μm (-9.0; -0.4 μm, p = 0.03). Higher indoor concentrations of particulate matter 2.5 (PM2.5) was associated with thinner RNFL: -3.6 μm (-5.6; -1.6 μm, p < 0.001) and a macular deficit: -2.7 μm (-5.3; -0.1 μm, p = 0.04) in the crude analyses, but not in the adjusted analyses. No difference was found among participants who smoked at age 18 years compared with non-smokers on RNFL or macular thickness. CONCLUSIONS We found that exposure to smoking during early life was associated with a thinner RNFL and macula at age 18 years. The absence of an association between active smoking at 18 years suggests that the vulnerability of the optic nerve is highest during prenatal life and early childhood.
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Affiliation(s)
- Linna Zhu
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Inger Christine Munch
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Centre for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | - Casper-Emil T Pedersen
- Copenhagen Prospective Studies on Asthma in Childhood Copenhagen University Hospital, Herlev-Gentofte, Denmark
| | - Jakob Stokholm
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Copenhagen Prospective Studies on Asthma in Childhood Copenhagen University Hospital, Herlev-Gentofte, Denmark
- Department of Pediatrics, Slagelse Hospital, Slagelse, Denmark
| | - Klaus Bønnelykke
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Copenhagen Prospective Studies on Asthma in Childhood Copenhagen University Hospital, Herlev-Gentofte, Denmark
| | - Bo Chawes
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Copenhagen Prospective Studies on Asthma in Childhood Copenhagen University Hospital, Herlev-Gentofte, Denmark
| | - Christian Jakob Carlsson
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Copenhagen Prospective Studies on Asthma in Childhood Copenhagen University Hospital, Herlev-Gentofte, Denmark
| | - Ann-Marie M Schoos
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Copenhagen Prospective Studies on Asthma in Childhood Copenhagen University Hospital, Herlev-Gentofte, Denmark
- Department of Pediatrics, Slagelse Hospital, Slagelse, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Hans Bisgaard
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Copenhagen Prospective Studies on Asthma in Childhood Copenhagen University Hospital, Herlev-Gentofte, Denmark
| | - Nicklas Brustad
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Copenhagen Prospective Studies on Asthma in Childhood Copenhagen University Hospital, Herlev-Gentofte, Denmark
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9
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Ba-Ali S, Fuchs J, Larsen M. Retraction of cystoid macular edema from the fovea after intravitreal anti-VEGF therapy for birdshot chorioretinopathy. Retin Cases Brief Rep 2023:01271216-990000000-00239. [PMID: 37874763 DOI: 10.1097/icb.0000000000001504] [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: 10/26/2023]
Abstract
PURPOSE To report the effect of anti-vascular endothelial growth factor inhibitor (anti-VEGF) on fovea-involving cystoid macular edema in a patient with Birdshot chorioretinopathy. METHODS A 42-year-old male patient presented to our hospital with bilateral posterior uveitis with retinal vasculitis, cystoid macular edema and optic disc edem a. He was diagnosed with birdshot chorioretinopathy based on clinical appearance and tissue type HLA-A29. RESULTS The patient underwent vitrectomy in the right eye without any change in visual acuity. Retinal leakage was reduced by oral prednisolone, which could not be tapered below 50 mg per day without relapse. Oral prednisolone, topical dexamethasone and subtenonal kenalog were associated with intraocular pressure rise in both eyes. Hence, his uveitis responded to steroids, but there was no detectable effect of any steroid-sparing immunomodulatory drugs. The patient had been on oral prednisolone 50 mg for five years when it was decided to attempt intravitreal VEGF inhibitor injection therapy. The anti-VEGF therapy diminished cystoid macular edema in the fovea and improved the visual acuity. CONCLUSION Here we report for the first time the long-term outcomes of anti-VEGF injections on fovea-involving cystoid macular edema in Birdshot chorioretinopathy to keep steroid at the minimal possible doses and preserve a satisfying visual acuity level.
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Affiliation(s)
- Shakoor Ba-Ali
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Josefine Fuchs
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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10
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Pedersen MK, Eriksson R, Reguant R, Collin C, Pedersen HK, Sørup FKH, Simon C, Birch AM, Larsen M, Nielsen AP, Belling K, Brunak S. A unidirectional mapping of ICD-8 to ICD-10 codes, for harmonized longitudinal analysis of diseases. Eur J Epidemiol 2023; 38:1043-1052. [PMID: 37555907 PMCID: PMC10570238 DOI: 10.1007/s10654-023-01027-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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 06/22/2023] [Indexed: 08/10/2023]
Abstract
Periodic revisions of the international classification of diseases (ICD) ensure that the classification reflects new practices and knowledge; however, this complicates retrospective research as diagnoses are coded in different versions. For longitudinal disease trajectory studies, a crosswalk is an essential tool and a comprehensive mapping between ICD-8 and ICD-10 has until now been lacking. In this study, we map all ICD-8 morbidity codes to ICD-10 in the expanded Danish ICD version. We mapped ICD-8 codes to ICD-10, using a many-to-one system inspired by general equivalence mappings such that each ICD-8 code maps to a single ICD-10 code. Each ICD-8 code was manually and unidirectionally mapped to a single ICD-10 code based on medical setting and context. Each match was assigned a score (1 of 4 levels) reflecting the quality of the match and, if applicable, a "flag" signalling choices made in the mapping. We provide the first complete mapping of the 8596 ICD-8 morbidity codes to ICD-10 codes. All Danish ICD-8 codes representing diseases were mapped and 5106 (59.4%) achieved the highest consistency score. Only 334 (3.9%) of the ICD-8 codes received the lowest mapping consistency score. The mapping provides a scaffold for translation of ICD-8 to ICD-10, which enable longitudinal disease studies back to and 1969 in Denmark and to 1965 internationally with further adaption.
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Affiliation(s)
- Mette Krogh Pedersen
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Robert Eriksson
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark
- Department of Infectious Diseases, Karolinska University Hospital, Stockholm, Sweden
- Division of Infectious Diseases, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Roc Reguant
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark
- Australian E-Health Research Centre, Commonwealth Scientific and Industrial Research Organisation, Sydney, Australia
| | - Catherine Collin
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Helle Krogh Pedersen
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark
| | | | - Christian Simon
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Anna Marie Birch
- Department of Obstetrics and Gynaecology, Holbæk Hospital, Holbæk, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet-Glostrup, Copenhagen University Hospital, Glostrup, Denmark
| | - Anna Pors Nielsen
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Kirstine Belling
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Søren Brunak
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200, Copenhagen, Denmark.
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11
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Carstensen CV, Bjerager J, Belmouhand M, Eckmann-Hansen C, Rothenbuehler SP, Dabbah S, Dalgård C, Laigaard P, Larsen M. Ocular and systemic associations and heritability of retinal arterial wall-to-lumen ratios in a twin cohort. Acta Ophthalmol 2023. [PMID: 37702272 DOI: 10.1111/aos.15755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 08/02/2023] [Accepted: 08/29/2023] [Indexed: 09/14/2023]
Abstract
PURPOSE To investigate ocular and systemic factors associated with the retinal arterial wall-to-lumen ratio (WLR) and to determine the relative contribution of genetic and environmental variation to WLR in healthy adults. METHODS This cross-sectional twin study included 78 monozygotic and 67 dizygotic same-sex twin pairs aged 58.4 ± 9.8 (mean ± SD) years. Lumen diameter (LD) and outer diameter (OD) of a superotemporal retinal artery were measured using adaptive optics fundus photography, and the WLR was calculated. Linear mixed model regression analysis of associations with WLR comprised the descriptive variables ocular axial length (AL), intraocular pressure (IOP), height, weight, body mass index (BMI), smoking, blood pressure, high density (HDL), low density (LDL) and very low density (VLDL) lipoproteins, total cholesterol and triglycerides. The relative influence of genes and environment on WLR was calculated through polygenetic modelling. RESULTS Increasing age and arterial blood pressure were associated with a higher WLR, while increasing retinal artery OD and ocular AL were associated with a lower WLR. Sex, smoking status, BMI, IOP, cholesterol levels or triglycerides had no detectable impact on the WLR. Broad-sense heritability of WLR was 21% (95% CI: 1-41%), while environmental factors accounted for the remaining 79% of the interindividual variance (95% CI: 59-99%). CONCLUSION Retinal artery wall thickness was closely linked to increasing age and higher arterial blood pressure, the latter being mediated by the environment over genes.
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Affiliation(s)
- Christopher Voigt Carstensen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Clinical Medicine, Faculty of Healthy and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Jakob Bjerager
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
| | | | | | | | - Sami Dabbah
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Ophthalmology, Odense University Hospital, Odense, Denmark
| | - Christine Dalgård
- The Danish Twin Research Center, University of Southern Denmark, Odense, Denmark
- Department of Public Health, Clinical Pharmacology, Pharmacy and Environmental Medicine, University of Southern Denmark, Odense, Denmark
| | - Poul Laigaard
- Department of Neurology, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Clinical Medicine, Faculty of Healthy and Medical Science, University of Copenhagen, Copenhagen, Denmark
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12
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Canakis A, Bomman S, Lee DU, Ross A, Larsen M, Krishnamoorthi R, Alseidi AA, Adam MA, Kouanda A, Sharaiha RZ, Mahadev S, Dawod S, Sampath K, Arain MA, Farooq A, Hasan MK, Kadkhodayan K, de la Fuente SG, Benias PC, Trindade AJ, Ma M, Gilman AJ, Fan GH, Baron TH, Irani SS. Benefits of EUS-guided gastroenterostomy over surgical gastrojejunostomy in the palliation of malignant gastric outlet obstruction: a large multicenter experience. Gastrointest Endosc 2023; 98:348-359.e30. [PMID: 37004816 DOI: 10.1016/j.gie.2023.03.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/12/2023] [Accepted: 03/14/2023] [Indexed: 04/04/2023]
Abstract
BACKGROUND AND AIMS Palliation of malignant gastric outlet obstruction (mGOO) allows resumption of peroral intake. Although surgical gastrojejunostomy (SGJ) provides durable relief, it may be associated with a higher morbidity, interfere with chemotherapy, and require an optimum nutritional status. EUS-guided gastroenterostomy (EUS-GE) has emerged as a minimally invasive alternative. We aimed to conduct the largest comparative series to date between EUS-GE and SGJ for mGOO. METHODS This multicenter retrospective study included consecutive patients undergoing SGJ or EUS-GE at 6 centers. Primary outcomes included time to resumption of oral intake, length of stay (LOS), and mortality. Secondary outcomes included technical and clinical success, reintervention rates, adverse events (AEs), and resumption of chemotherapy. RESULTS A total of 310 patients were included (EUS-GE, n = 187; SGJ, n = 123). EUS-GE exhibited significantly lower time to resumption of oral intake (1.40 vs 4.06 days, P < .001), at lower albumin levels (2.95 vs 3.33 g/dL, P < .001), and a shorter LOS (5.31 vs 8.54 days, P < .001) compared with SGJ; there was no difference in mortality (48.1% vs 50.4%, P = .78). Technical (97.9% and 100%) and clinical (94.1% vs 94.3%) success was similar in the EUS-GE and SGJ groups, respectively. EUS-GE had lower rates of AEs (13.4% vs 33.3%, P < .001) but higher reintervention rates (15.5% vs 1.63%, P < .001). EUS-GE patients exhibited significantly lower interval time to resumption of chemotherapy (16.6 vs 37.8 days, P < .001). Outcomes between the EUS-GE and laparoscopic (n = 46) surgical approach showed that EUS-GE had shorter interval time to initiation/resumption of oral intake (3.49 vs 1.46 days, P < .001), decreased LOS (9 vs 5.31 days, P < .001), and a lower rate of AEs (11.9% vs 17.9%, P = .003). CONCLUSIONS This is the largest study to date showing that EUS-GE can be performed among nutritionally deficient patients without affecting the technical and clinical success compared with SGJ. EUS-GE is associated with fewer AEs while allowing earlier resumption of diet and chemotherapy.
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Affiliation(s)
- Andrew Canakis
- Division of Gastroenterology and Hepatology, University of Maryland Medical Center, Baltimore, Maryland, USA
| | - Shivanand Bomman
- Division of Gastroenterology and Hepatology, Virginia Mason Medical Center, Seattle, Washington, USA
| | - David U Lee
- Division of Gastroenterology and Hepatology, University of Maryland Medical Center, Baltimore, Maryland, USA
| | - Andrew Ross
- Division of Gastroenterology and Hepatology, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Michael Larsen
- Division of Gastroenterology and Hepatology, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Rajesh Krishnamoorthi
- Division of Gastroenterology and Hepatology, Virginia Mason Medical Center, Seattle, Washington, USA
| | | | | | - Abdul Kouanda
- Division of Gastroenterology and Hepatology, University of California, San Francisco, San Francisco, California, USA
| | - Reem Z Sharaiha
- Division of Gastroenterology and Hepatology, Weill Medical College of Cornell University, New York, New York, USA
| | - SriHari Mahadev
- Division of Gastroenterology and Hepatology, Weill Medical College of Cornell University, New York, New York, USA
| | - Sanad Dawod
- Division of Gastroenterology and Hepatology, Weill Medical College of Cornell University, New York, New York, USA
| | - Kartik Sampath
- Division of Gastroenterology and Hepatology, Weill Medical College of Cornell University, New York, New York, USA
| | | | | | | | | | | | - Petros C Benias
- Division of Gastroenterology, Lenox Hill Hospital, New York, New York, USA
| | - Arvind J Trindade
- Division of Gastroenterology, Long Island Jewish Medical Center, New Hyde Park, New York, USA
| | - Michael Ma
- Division of Gastroenterology, Lenox Hill Hospital, New York, New York, USA
| | - Andrew J Gilman
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | | | - Todd H Baron
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Shayan S Irani
- Division of Gastroenterology and Hepatology, Virginia Mason Medical Center, Seattle, Washington, USA.
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13
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Kilgo JC, Vukovich M, Cox KJ, Larsen M, Mims TT, Garabedian JE. Assessing whole-sounder removal versus traditional control for reducing invasive wild pig (Sus scrofa) populations. Pest Manag Sci 2023; 79:3033-3042. [PMID: 36966457 DOI: 10.1002/ps.7478] [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] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 03/20/2023] [Accepted: 03/26/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Trapping is commonly used as the primary management tool in attempts to reduce invasive wild pigs (Sus scrofa), but traditional trapping techniques are often ineffective. However, recently developed traps permit the capture of entire social groups (sounders) of wild pigs, and the strategy of whole-sounder removal may achieve more effective control. Our objective was to experimentally compare traditional control (TC; primarily traditional trapping, but including hunting with dogs, and opportunistic shooting) and whole-sounder removal (WSR) strategies by assessing density reduction and removal rate after 1 and 2 years of treatment. RESULTS After 1 year of trapping, average wild pig density on WSR units declined 53% and remained stable after the second year, whereas on TC units, pig density did not differ after trapping, although it declined 33% and remained stable after the second year of trapping. The median removal rate (percentage of uniquely marked pigs present at the beginning of each year that were removed) was 42.5% for WSR units and 0.0% for TC units during 2018 and were 29.6% from WSR units and 5.3% from TC units during 2019. CONCLUSIONS WSR removal was more effective at reducing wild pig density than TC, but factors such as previous exposure of this population to traditional traps and the lack of barriers to recolonization from surrounding areas may have reduced WSR efficacy. WSR can effectively reduce wild pig density to a greater extent than TC, but managers should recognize the additional time and expense necessary for implementation. Published 2023. This article is a U.S. Government work and is in the public domain in the USA. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- John C Kilgo
- USDA Forest Service, Southern Research Station, New Ellenton, SC, USA
| | - Mark Vukovich
- USDA Forest Service, Southern Research Station, New Ellenton, SC, USA
| | - Kyle J Cox
- USDA Forest Service, Southern Research Station, New Ellenton, SC, USA
| | - Michael Larsen
- USDA Forest Service, Savannah River, New Ellenton, SC, USA
| | - Thomas T Mims
- USDA Forest Service, Savannah River, New Ellenton, SC, USA
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14
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Larsen M, He F, Kawasawa YI, Berg A, Vgontzas AN, Liao D, Bixler EO, Fernandez-Mendoza J. Objective and subjective measures of sleep initiation are differentially associated with DNA methylation in adolescents. Clin Epigenetics 2023; 15:136. [PMID: 37634000 PMCID: PMC10464279 DOI: 10.1186/s13148-023-01553-2] [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: 01/19/2023] [Accepted: 08/14/2023] [Indexed: 08/28/2023] Open
Abstract
INTRODUCTION The onset of puberty is associated with a shift in the circadian timing of sleep, leading to delayed sleep initiation [i.e., later sleep onset time (SOT)] due to later bedtimes and/or longer sleep onset latency (SOL). Several genome-wide association studies (GWAS) have identified genes that may be involved in the etiology of sleep phenotypes. However, circadian rhythms are also epigenetically regulated; therefore, epigenetic biomarkers may provide insight into the physiology of the pubertal sleep onset shift and the pathophysiology of prolonged or delayed sleep initiation. RESULTS The gene-wide analysis indicated differential methylation within or around 1818 unique genes across the sleep initiation measurements using self-report, actigraphy (ACT), and polysomnography (PSG), while GWAS-informed analysis yielded 67 genes. Gene hits were identified for bedtime (PSG), SOL (subjective, ACT and PSG) and SOT (subjective and PSG). DNA methylation within 12 genes was associated with both subjective and PSG-measured SOL, 31 with both ACT- and PSG-measured SOL, 19 with both subjective and ACT-measured SOL, and one gene (SMG1P2) had methylation sites associated with subjective, ACT- and PSG-measured SOL. CONCLUSIONS Objective and subjective sleep initiation in adolescents is associated with altered DNA methylation in genes previously identified in adult GWAS of sleep and circadian phenotypes. Additionally, our data provide evidence for a potential epigenetic link between habitual (subjective and ACT) SOL and in-lab SOT and DNA methylation in and around genes involved in circadian regulation (i.e., RASD1, RAI1), cardiometabolic disorders (i.e., FADS1, WNK1, SLC5A6), and neuropsychiatric disorders (i.e., PRR7, SDK1, FAM172A). If validated, these sites may provide valuable targets for early detection and prevention of disorders involving prolonged or delayed SOT, such as insomnia, delayed sleep phase, and their comorbidity.
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Affiliation(s)
- Michael Larsen
- Sleep Research and Treatment Center, Department of Psychiatry & Behavioral Health, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Fan He
- Department of Public Health Sciences, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Yuka Imamura Kawasawa
- Departments of Biochemistry and Molecular Biology and Pharmacology, Institute for Personalized Medicine, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Arthur Berg
- Department of Public Health Sciences, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Alexandros N Vgontzas
- Sleep Research and Treatment Center, Department of Psychiatry & Behavioral Health, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Duanping Liao
- Department of Public Health Sciences, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Edward O Bixler
- Sleep Research and Treatment Center, Department of Psychiatry & Behavioral Health, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Julio Fernandez-Mendoza
- Sleep Research and Treatment Center, Department of Psychiatry & Behavioral Health, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
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15
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Eckmann-Hansen C, Bek T, Sander B, Larsen M. Visual Function and Inner Retinal Structure in Relation to Birth Factors in Autosomal Dominant Optic Atrophy. Invest Ophthalmol Vis Sci 2023; 64:32. [PMID: 37498569 PMCID: PMC10382992 DOI: 10.1167/iovs.64.10.32] [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: 07/28/2023] Open
Abstract
Purpose The extreme variation in expressivity of autosomal dominant optic atrophy (ADOA) is unexplained. It is present from early childhood, why there is reason to search for pre- and perinatal risk factors for poor vision in ADOA. The process of ganglion cell pruning in the fetus is of interest because mitochondria are involved in apoptosis. We hypothesized that suboptimal mitochondrial function makes the developing retina and optic nerve vulnerable to fetal stress in ADOA. We have examined visual function and inner retinal layer structure in relation to birth parameters in ADOA. Methods The study included 142 participants with OPA1 ADOA, 62 unaffected first-degree relatives, and 90 unrelated control subjects. Outcome measures included best-corrected visual acuity, microperimetric sensitivity, nerve fiber layer (NFL) volume, and ganglion cell layer (GCL) volume. Descriptive parameters included birth weight, maternal age at birth, birth complications, and gestational age. Analysis was made using mixed modeling. Results The analysis showed a significant positive association between microperimetric sensitivity and longer gestational age in ADOA (0.5 dB/week, P = 0.017). Interaction analysis showed a significant different association between microperimetric sensitivity and gestational age between participants with ADOA and the control groups (P = 0.007) and a significant difference in association between NFL volume and birth weight (P = 0.04) and gestational age (P = 0.02) between variant types. Conclusions The study suggests that gestational age and birth weight may affect the expressivity of ADOA. The results support that prospectively collected pre- and perinatal data should be included in future studies of the natural history of ADOA.
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Affiliation(s)
- Christina Eckmann-Hansen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Toke Bek
- Department of Ophthalmology, Aarhus University Hospital, Aarhus, Denmark
| | - Birgit Sander
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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16
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Morales-Ghinaglia N, Larsen M, He F, Calhoun SL, Vgontzas AN, Liao J, Liao D, Bixler EO, Fernandez-Mendoza J. Circadian Misalignment Impacts the Association of Visceral Adiposity With Elevated Blood Pressure in Adolescents. Hypertension 2023; 80:861-871. [PMID: 36876501 PMCID: PMC10023353 DOI: 10.1161/hypertensionaha.122.20398] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/10/2022] [Indexed: 03/07/2023]
Abstract
BACKGROUND Although insufficient sleep has been shown to contribute to obesity-related elevated blood pressure, the circadian timing of sleep has emerged as a novel risk factor. We hypothesized that deviations in sleep midpoint, a measure of circadian timing of sleep, modify the association between visceral adiposity and elevated blood pressure in adolescents. METHODS We studied 303 subjects from the Penn State Child Cohort (16.2±2.2 years; 47.5% female; 21.5% racial/ethnic minority). Actigraphy-measured sleep duration, midpoint, variability, and regularity were calculated across a 7-night period. Visceral adipose tissue (VAT) was measured with dual-energy X-ray absorptiometry. Systolic blood pressure (SBP) and diastolic blood pressure levels were measured in the seated position. Multivariable linear regression models tested sleep midpoint and its regularity as effect modifiers of VAT on SBP/diastolic blood pressure levels, while adjusting for demographic and sleep covariables. These associations were also examined as a function of being in-school or on-break. RESULTS Significant interactions were found between VAT and sleep irregularity, but not sleep midpoint, on SBP (P interaction=0.007) and diastolic blood pressure (P interaction=0.022). Additionally, significant interactions were found between VAT and schooldays sleep midpoint on SBP (P interaction=0.026) and diastolic blood pressure (P interaction=0.043), whereas significant interactions were found between VAT and on-break weekdays sleep irregularity on SBP (P interaction=0.034). CONCLUSIONS A delayed and an irregular sleep midpoint during school and during free-days, respectively, increase the impact of VAT on elevated blood pressure in adolescents. These data suggest that deviations in the circadian timing of sleep contribute to the increased cardiovascular sequelae associated with obesity and that its distinct metrics require measurement under different entrainment conditions in adolescents.
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Affiliation(s)
- Natasha Morales-Ghinaglia
- Sleep Research & Treatment Center, Department of Psychiatry & Behavioral Health, Penn State University, College of Medicine, Hershey PA 17033
| | - Michael Larsen
- Sleep Research & Treatment Center, Department of Psychiatry & Behavioral Health, Penn State University, College of Medicine, Hershey PA 17033
| | - Fan He
- Department of Public Health Sciences, Penn State University, College of Medicine, Hershey PA 17033
| | - Susan L. Calhoun
- Sleep Research & Treatment Center, Department of Psychiatry & Behavioral Health, Penn State University, College of Medicine, Hershey PA 17033
| | - Alexandros N. Vgontzas
- Sleep Research & Treatment Center, Department of Psychiatry & Behavioral Health, Penn State University, College of Medicine, Hershey PA 17033
| | - Jason Liao
- Department of Public Health Sciences, Penn State University, College of Medicine, Hershey PA 17033
| | - Duanping Liao
- Department of Public Health Sciences, Penn State University, College of Medicine, Hershey PA 17033
| | - Edward O. Bixler
- Sleep Research & Treatment Center, Department of Psychiatry & Behavioral Health, Penn State University, College of Medicine, Hershey PA 17033
| | - Julio Fernandez-Mendoza
- Sleep Research & Treatment Center, Department of Psychiatry & Behavioral Health, Penn State University, College of Medicine, Hershey PA 17033
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Motomura D, Irani S, Larsen M, Kozarek RA, Ross AS, Gan SI. Multicenter retrospective cohort of EUS-guided anterograde pancreatic duct access. Endosc Int Open 2023; 11:E358-E365. [PMID: 37077663 PMCID: PMC10110360 DOI: 10.1055/a-2029-2520] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 01/31/2023] [Indexed: 04/21/2023] Open
Abstract
Background and study aims Pancreatic duct (PD) cannulation may be difficult during conventional endoscopic retrograde cholangiopancreatography (ERCP) due to underlying pathology, anatomical variants or surgically altered anatomy. Pancreatic access in these cases previously necessitated percutaneous or surgical approaches. Endoscopic ultrasound (EUS) allows for an alternative and can be combined with ERCP for rendezvous during the same procedure, or for other salvage options. Patients and methods Patients with attempted EUS access of the PD from tertiary referral centers between 2009 and 2022 were included in the cohort. Demographic data, technical data, procedural outcomes and adverse events were collected. The primary outcome was rendezvous success. Secondary outcomes included rates of successful PD decompression and change in procedural success over time. Results The PD was accessed in 105 of 111 procedures (95 %), with successful subsequent ERCP in 45 of 95 attempts (47 %). Salvage direct PD stenting was performed in 5 of 14 attempts (36 %). Sixteen patients were scheduled for direct PD stenting (without rendezvous) with 100 % success rate. Thus 66 patients (59 %) had successful decompression. Success rates improved from 41 % in the first third of cases to 76 % in the final third. There were 13 complications (12 %), including post-procedure pancreatitis in seven patients (6 %). Conclusions EUS-guided anterograde pancreas access is a feasible salvage method if retrograde access fails. The duct can be cannulated, and drainage can be achieved in the majority of cases. Success rates improve over time. Future research may involve investigation into technical, patient and procedural factors contributing to rendezvous success.
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Affiliation(s)
- Douglas Motomura
- Division of Gastroenterology, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia
| | - Shayan Irani
- Gastroenterology Section, Digestive Disease Institute, Virginia Mason Franciscan Health, Seattle, Washington, United States
| | - Michael Larsen
- Gastroenterology Section, Digestive Disease Institute, Virginia Mason Franciscan Health, Seattle, Washington, United States
| | - Richard A Kozarek
- Gastroenterology Section, Digestive Disease Institute, Virginia Mason Franciscan Health, Seattle, Washington, United States
| | - Andrew S Ross
- Gastroenterology Section, Digestive Disease Institute, Virginia Mason Franciscan Health, Seattle, Washington, United States
| | - S Ian Gan
- Division of Gastroenterology, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia
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18
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Schmidt MF, Pihl-Jensen G, Torm MEW, Passali M, Larsen M, Frederiksen JL. Hyperreflective dots in the avascular outer retina in relapsing-remitting multiple sclerosis. Mult Scler Relat Disord 2023; 72:104617. [PMID: 36940613 DOI: 10.1016/j.msard.2023.104617] [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: 12/15/2022] [Revised: 02/20/2023] [Accepted: 03/10/2023] [Indexed: 03/14/2023]
Abstract
BACKGROUND Hyperreflective granular elements with a transient presence in the retina can be detected non-invasively by optical coherence tomography (OCT). Such foci or dots may represent aggregates of activated microglia. However, in multiple sclerosis an increased number of hyperreflective foci has so far not been demonstrated in the intrinsically hyporeflective and avascular outer nuclear layer of the retina where there are no fixed elements in healthy eyes. Therefore, the present study intended to investigate the presence of hyperreflective foci in the outer nuclear layer in patients with relapsing- remitting multiple sclerosis (RRMS) by using a high-resolution OCT scanning protocol. METHODS This cross-sectional exploratory study examined 88 eyes in 44 RRMS patients and 106 eyes in 53 age- and sex-matched healthy subjects. None of the patients had any sign of retinal disease. All patients and healthy subjects each underwent one session of spectral domain OCT imaging. A total of 23,200 B-scans extracted from 8 × 8 mm blocks of linear B-scans at 60 μm intervals were analysed for hyperreflective foci in the outer nuclear layer of the retina. Analyses were made of the total block scan and a circular 6-mm diameter fovea-centered field in each eye. Multivariate logistic regression analysis was used to assess associations between parameters. RESULTS Hyperreflective foci were observed in 31 out of 44 (70.5 %) multiple sclerosis patients compared to 1 out of 53 (1.8%) healthy subjects (p < 0.0001). From analyses of the total block scans, the median number of hyperreflective foci in the outer nuclear layer was 1 (range 0-13) in patients and 0 (range 0-2) in healthy subjects (p < 0.0001). In total, 66.2% of all hyperreflective foci were located within 6 mm of the center of the macula. There was no detectable association between the presence of hyperreflective foci and retinal nerve fiber layer or ganglion cell layer thickness. CONCLUSION Hyperreflective granular foci in the avascular outer nuclear layer of the retina seen by OCT were almost completely absent in healthy subjects, whereas they were found, albeit at low density, in the majority of patients with RRMS. Hyperreflective foci can be repeatedly examined by non-invasive means and without pupil dilation, which opens a new field of investigation of infiltrating elements in an unmyelinated part of the central nervous system.
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Affiliation(s)
- Mathias Falck Schmidt
- Department of Neurology, Clinic of Optic Neuritis, The Danish Multiple Sclerosis Center (DMSC), Rigshospitalet and University of Copenhagen, Valdemar Hansens Vej 13, 2600, Glostrup, Denmark.
| | - Gorm Pihl-Jensen
- Department of Neurology, Clinic of Optic Neuritis, The Danish Multiple Sclerosis Center (DMSC), Rigshospitalet and University of Copenhagen, Valdemar Hansens Vej 13, 2600, Glostrup, Denmark
| | - Marie Elise Wistrup Torm
- Department of Ophthalmology, Rigshospitalet and University of Copenhagen, Valdemar Hansens Vej 13, 2600, Glostrup, Denmark
| | - Moschoula Passali
- Department of Neurology, Clinic of Optic Neuritis, The Danish Multiple Sclerosis Center (DMSC), Rigshospitalet and University of Copenhagen, Valdemar Hansens Vej 13, 2600, Glostrup, Denmark
| | - Michael Larsen
- Professor of Clinical Ophthalmology, Department of Ophthalmology, Rigshospitalet and University of Copenhagen, Valdemar Hansens Vej 13, 2600, Glostrup, Denmark
| | - Jette Lautrup Frederiksen
- Professor of Clinical Neurology, Department of Neurology, Clinic of Optic Neuritis, The Danish Multiple Sclerosis Center (DMSC), Rigshospitalet and University of Copenhagen, Valdemar Hansens Vej 13, 2600 Glostrup, Denmark
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19
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Souza V, Aguilar M, Storm A, Larsen M, Hanigan M. Ruminal tissue uptake of amino acids in Holstein cows when supply of nutrients within the rumen differs. Animal 2023; 17:100778. [PMID: 37043932 DOI: 10.1016/j.animal.2023.100778] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 03/03/2023] [Accepted: 03/07/2023] [Indexed: 03/17/2023] Open
Abstract
Characterisation of amino acid (AA) use by the ruminal vein-drained viscera (RDV) has not been assessed in vivo in dairy cattle, and thus, the extent of ruminal AA use from arterial and postabsorptive blood supplies is unclear. Understanding the complete use of AA by the splanchnic bed may lead to alternative feeding programmes that maximise animal N efficiency. The objective of this work was to determine how different nutritional manipulations affect RDV net appearance and apparent affinity for arterial AA in lactating dairy cattle. Data from two arterio-venous (A-V) difference studies, that used a common set of multicatheterised lactating Holstein cows, assigned to different nutritional treatments, were used to assess ruminal metabolism. Study 1 consisted of three dietary treatments at calving [an alfalfa-glucogenic diet, a glucogenic diet (GLCG), or a ketogenic diet (KETO)] to investigate the effects of dietary nutrients and increasing intake postpartum on RDV metabolism of AA at -14, +4, +15, and +29 days relative to calving (DRTC). Study 2 consisted of two dietary levels of CP (17 or 13%) and three ruminal buffers (ammonia, butyrate, and control) to investigate the level of dietary CP and ruminal fermentation products on RDV metabolism of AA. Blood was collected at 9, 20, and 30 min after buffer administration. Regardless of dietary nutrients or fermentation products present in ruminal fluid, net RDV uptake was positive for most AA, excepting Asp, Cys, Glu, and Ser, which were consistently negative. The general positive net uptakes indicate that any AA potentially absorbed from the rumen were not adequate to meet apparent needs. Ruminal plasma flow and net RDV uptake of Trp, Ala, Gly, and Pro increased linearly with increased DRTC. Feeding KETO or GLCG diets increased ruminal plasma flow, and net RDV uptake of Thr and Gly. Feeding high CP diets increased ruminal uptake of Leu, Phe, and Val. The increased AA uptakes were partially driven by increased plasma flow, however, tissue affinity as reflected in clearance rates also increased or tended to for Met, Trp, Ala, Gly, Pro, and Tyr suggesting that changes in RDV uptake were regulated and not due solely to mass action. In conclusion, splanchnic tissue bed responses to dietary and washed rumen conditions were in part driven by changes in RDV nutrient demand and metabolic activity. The adaptive responses alter the fraction of absorbed AA utilised for non-productive purposes and thus the efficiency of conversion of those AA to product.
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20
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Schmidt MF, Christensen JL, Dahl VA, Toosy A, Petzold A, Hanson JVM, Schippling S, Frederiksen JL, Larsen M. Automated detection of hyperreflective foci in the outer nuclear layer of the retina. Acta Ophthalmol 2023; 101:200-206. [PMID: 36073938 DOI: 10.1111/aos.15237] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/12/2022] [Accepted: 08/14/2022] [Indexed: 11/27/2022]
Abstract
PURPOSE Hyperreflective foci are poorly understood transient elements seen on optical coherence tomography (OCT) of the retina in both healthy and diseased eyes. Systematic studies may benefit from the development of automated tools that can map and track such foci. The outer nuclear layer (ONL) of the retina is an attractive layer in which to study hyperreflective foci as it has no fixed hyperreflective elements in healthy eyes. In this study, we intended to evaluate whether automated image analysis can identify, quantify and visualize hyperreflective foci in the ONL of the retina. METHODS This longitudinal exploratory study investigated 14 eyes of seven patients including six patients with optic neuropathy and one with mild non-proliferative diabetic retinopathy. In total, 2596 OCT B-scan were obtained. An image analysis blob detector algorithm was used to detect candidate foci, and a convolutional neural network (CNN) trained on a manually labelled subset of data was then used to select those candidate foci in the ONL that fitted the characteristics of the reference foci best. RESULTS In the manually labelled data set, the blob detector found 2548 candidate foci, correctly detecting 350 (89%) out of 391 manually labelled reference foci. The accuracy of CNN classifier was assessed by manually splitting the 2548 candidate foci into a training and validation set. On the validation set, the classifier obtained an accuracy of 96.3%, a sensitivity of 88.4% and a specificity of 97.5% (AUC 0.989). CONCLUSION This study demonstrated that automated image analysis and machine learning methods can be used to successfully identify, quantify and visualize hyperreflective foci in the ONL of the retina on OCT scans.
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Affiliation(s)
- Mathias Falck Schmidt
- Department of Neurology, Clinic of Optic Neuritis, The Danish Multiple Sclerosis Center (DMSC), Rigshospitalet, Glostrup, Denmark
| | - Jakob Lønborg Christensen
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Lyngby, Denmark
| | - Vedrana Andersen Dahl
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Lyngby, Denmark
| | - Ahmed Toosy
- NMR Research Unit, Queen Square Multiple Sclerosis Centre, Department of Neuroinflammation, Queen Square UCL Institute of Neurology, University College London, London, UK
| | - Axel Petzold
- Moorfields Eye Hospital NHS Foundation Trust, London, UK.,Neuro-ophthalmology Expertise Centre, University Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.,UCL Institute of Neurology, London, UK
| | - James V M Hanson
- Department of Ophthalmology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Sven Schippling
- Multimodal Imaging in Neuroimmunological Diseases (MINDS), University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Jette Lautrup Frederiksen
- Department of Neurology, Clinic of Optic Neuritis, The Danish Multiple Sclerosis Center (DMSC), Rigshospitalet and University of Copenhagen, Glostrup, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet and University of Copenhagen, Glostrup, Denmark
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21
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Larsen M. Nitrates and Age-Related Macular Degeneration. JAMA Ophthalmol 2023; 141:139. [PMID: 36547987 DOI: 10.1001/jamaophthalmol.2022.5625] [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: 12/24/2022]
Affiliation(s)
- Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark.,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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22
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Bomman S, Sanders D, Coy D, La Selva D, Pham Q, Zehr T, Law J, Larsen M, Irani S, Kozarek RA, Ross A, Krishnamoorthi R. Safety and clinical outcomes of early dual modality drainage (< 28 days) compared to later drainage of pancreatic necrotic fluid collections: a propensity score-matched study. Surg Endosc 2023; 37:902-911. [PMID: 36038648 DOI: 10.1007/s00464-022-09561-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 08/12/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Necrotizing pancreatitis can be complicated by Necrotic Fluid Collections (NFC). Guidelines recommend waiting for 4 weeks from the onset of acute pancreatitis (AP) before considering endoscopic drainage. We aimed to compare outcomes and safety in patients undergoing early versus late drainage of NFC. METHODS We performed a retrospective review of all patients who underwent Dual Modality Drainage (DMD) [combined endoscopic and percutaneous drainage] for NFC from January 2007 to December 2020. Patients were stratified into the "early" group (DMD < 28 days from AP onset) and were matched to "late" (DMD ≥ 28 days) drainage group using propensity- core-matching. Primary outcomes of interest were technical success and adverse events. Secondary outcomes included clinical success, late complication rates, and mortality. RESULTS We identified 278 patients who underwent DMD for NFC. Thirty-nine belonged to the early group and were matched to 174 patients from the late group. Technical success was similar in both early and late groups (97.4% vs 99.4%: P = 0.244) as were the procedural and early post-procedural (< 14 days) adverse events rates (23.1% vs 27.6%: P = 0.565). Clinical success (92.3% vs 93.1%; P = 0.861) and late complication rates (23.1% vs 31.6%; P = 0.294) were similar. There were 2 deaths (5.7%) in the early vs. 9 (5.2%) in the late group, P = 0.991. CONCLUSIONS When performed in a tertiary care center with expertise in therapeutic endoscopic ultrasound, early drainage of NFC appears to be feasible and safe. Further studies are needed to validate our results.
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Affiliation(s)
- Shivanand Bomman
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - David Sanders
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - David Coy
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Danielle La Selva
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Quincy Pham
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Troy Zehr
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Joanna Law
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Michael Larsen
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Shayan Irani
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Richard A Kozarek
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Andrew Ross
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA
| | - Rajesh Krishnamoorthi
- Center for Digestive Health, Virginia Mason Franciscan Health, 1100, 9th Avenue, Mail stop: C3-GAS, Seattle, WA, 98101, USA.
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23
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Hansen NP, Jensen SK, Johansen M, Hellwing ALF, Ambye-Jensen M, Larsen M, Weisbjerg MR. Fiber digestibility and protein value of pulp silage for lactating dairy cows: Effects of wet fractionation by screw pressing of perennial ryegrass. J Dairy Sci 2023; 106:937-953. [PMID: 36460507 DOI: 10.3168/jds.2022-21851] [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: 01/21/2022] [Accepted: 08/24/2022] [Indexed: 11/30/2022]
Abstract
The aim of the study was to investigate the effects of substituting silage of chopped grass with pulp silage of grass fractionated once or twice in a biorefinery using a screw press on fiber kinetics, protein value, and production of CH4 in dairy cows. Six lactating multiparous Holstein cows in mid-lactation (176 ± 93 d in milk), cannulated in the rumen, duodenum, and ileum, were used in an incomplete 6 × 4 Latin square design with a 2 × 3 factorial arrangement of treatments. Perennial ryegrass was harvested in third regrowth from the same field at early and late developmental stage (35 and 44 d of regrowth, respectively) and subjected to 1 of 3 types of processing within each developmental stage. Grass was either harvested for normal silage making (mowed, wilted, chopped, and ensiled), or harvested fresh and fractionated using a screw press. Half of the pulp from the first fractionation was ensiled, whereas the other half of the pulp was rehydrated, fractionated a second time, and pulp hereof was ensiled. The grass and pulp silages were used with concentrates (65:35 forage to concentrate ratio) to make total mixed rations (TMR) based on either silage of chopped grass (GS), pulp silage of grass fractionated once (1×P), or pulp silage of grass fractionated twice (2×P), harvested either at early (E) or late (L) developmental stage resulting in 6 different TMR treatments (EGS, E1×P, E2×P, LGS, L1×P, L2×P). The TMR were fed for ad libitum intake and samples of intestinal digesta and feces were collected for determination of digestibility. The effect of processing on ash-free neutral detergent fiber (aNDFom) concentration in silages depended on developmental stage, but showed that within each developmental stage, pulp silage of grass fractionated twice had higher aNDFom concentration than pulp silage of grass fractionated once and silage of chopped grass. The 2×P resulted in lower (14.9 ± 0.55 vs. 17.5 ± 0.54 kg/d) dry matter intake (DMI) compared with GS. The effects of processing and developmental stage interacted such that apparent total-tract aNDFom digestibility was higher (784 ± 13 vs. 715 ± 13 g/kg) for L2×P compared with LGS, whereas no difference was found between E2×P and EGS. Moreover, the protein value was higher (106 ± 5 vs. 92 ± 5 g AA digested in the small intestine/kg of DMI) for 2×P compared with GS. Unexpectedly, processing had no effect on fractional rate of digestion of digestible aNDFom or CH4 yield (L/kg of DMI), whereas feeding forages harvested at early compared with late developmental stage resulted in lower CH4 yield. Feeding pulp silage of grass fractionated once generally yielded results intermediate to cows fed silage of chopped grass and pulp silage of grass fractionated twice. This study showed that pulp silage of fractionated grass could serve as feed for dairy cows because the fiber digestibility and protein value improved, but further research investigating effects of physical processing of forage on fiber kinetics is required.
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Affiliation(s)
- N P Hansen
- Department of Animal Science, AU Foulum, Aarhus University, 8830 Tjele, Denmark.
| | - S K Jensen
- Department of Animal Science, AU Foulum, Aarhus University, 8830 Tjele, Denmark
| | - M Johansen
- Department of Animal Science, AU Foulum, Aarhus University, 8830 Tjele, Denmark
| | - A L F Hellwing
- Department of Animal Science, AU Foulum, Aarhus University, 8830 Tjele, Denmark
| | - M Ambye-Jensen
- Department of Biological and Chemical Engineering, Aarhus University, 8000 Aarhus C, Denmark
| | - M Larsen
- Department of Animal Science, AU Foulum, Aarhus University, 8830 Tjele, Denmark
| | - M R Weisbjerg
- Department of Animal Science, AU Foulum, Aarhus University, 8830 Tjele, Denmark
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24
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Minakata K, Eckmann-Hansen C, Larsen M, Bek T, Beier S. The effect of serifs and stroke contrast on low vision reading. Acta Psychol (Amst) 2023; 232:103810. [PMID: 36563495 DOI: 10.1016/j.actpsy.2022.103810] [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: 07/04/2022] [Revised: 11/11/2022] [Accepted: 12/09/2022] [Indexed: 12/24/2022] Open
Abstract
PURPOSE Patients with low vision are generally recommended to use the same fonts as individuals with normal vision. However, we are yet to fully understand whether stroke width and serifs (small ornamentations at stroke endings) can increase readability. This study's purpose was to characterize the interaction between two factors (end-of-stroke and stroke width) in a well-defined and homogenous group of patients with low vision. METHODS Font legibility was assessed by measuring word identification performance of 19 patients with low vision (autosomal dominant optic atrophy [ADOA] with a best-corrected average visual acuity 20/110) and a two-interval, forced-choice task was implemented. Word stimuli were presented with four different fonts designed to isolate the stylistic features of serif and stroke width. RESULTS Font-size threshold and sensitivity data revealed that using a single measure (i.e., font-size threshold) is insufficient for detecting significant effects but triangulation is possible when combined with signal detection theory. Specifically, low stroke contrast (smaller variation in stroke width) yielded significantly lower thresholds and higher sensitivity when a font contained serifs (331 points; d' = 1.47) relative to no serifs (345 points; d' = 1.15), E(μsans, low - μserif, low) = -14 points, 95 % Cr. I. = [-24, -5], P(δ > 0) = 0.99 and E(μserif, low - μsans, low) = 0.32, 95 % Cr. I. = [0.16, 0.49], P(δ > 0) = 0.99. CONCLUSION In people with low visual acuity caused by ADOA, the combination of serifs and a uniform stroke width resulted in better text legibility than other combinations of uniform/variable stroke widths and presence/absence of serifs.
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Affiliation(s)
- Katsumi Minakata
- Centre for Visibility Design, Royal Danish Academy - Architecture, Design, Conservation, Denmark
| | - Christina Eckmann-Hansen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Toke Bek
- Department of Ophthalmology, Aarhus University Hospital, Denmark
| | - Sofie Beier
- Centre for Visibility Design, Royal Danish Academy - Architecture, Design, Conservation, Denmark.
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25
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Stefansson E, Loftsson T, Larsen M, Papp A, Kaarniranta K, Munk MR, Dugel P, Tadayoni R. Topical treatment of diabetic macular edema using dexamethasone ophthalmic suspension: A randomized, double-masked, vehicle-controlled study. Acta Ophthalmol 2023; 101:22-33. [PMID: 35848336 DOI: 10.1111/aos.15215] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/23/2022] [Accepted: 06/26/2022] [Indexed: 01/25/2023]
Abstract
PURPOSE To evaluate topical dexamethasone ophthalmic suspension OCS-01 (Oculis SA, Lausanne, Switzerland) in diabetic macular edema (DME). METHODS This was a multicenter, double-masked, parallel-group, randomized, Phase 2 study. Patients aged 18-85 years with DME of <3 years duration, ETDRS central subfield thickness ≥ 310 μm by SD-OCT, and ETDRS letter score ≤ 73 and ≥ 24 in the study eye were randomized 2:1 to OCS-01 or matching vehicle, 1 drop 3 times/day for 12 weeks. Efficacy was evaluated as change from baseline to Week 12 of ETDRS letter score and central macular thickness (CMT). The primary analysis used a linear model with baseline ETDRS letters as a covariate, and missing data imputed using multiple imputation pattern mixture model techniques. Active treatment was considered superior to vehicle if the one-sided p-value was <0.15 and the difference in mean change from baseline in ETDRS letters was >0. RESULTS Mean CMT showed a greater decrease from baseline with OCS-01 (N = 99) than vehicle (N = 45) at Week 12 (-53.6 vs -16.8 μm, p = 0.0115), with significant differences favouring OCS-01 from Weeks 2 to 12. OCS-01 was well-tolerated, and increased intraocular pressure was the most common adverse event. Mean change in ETDRS letter score from baseline to Week 12 met the p was +2.6 letters with topical OCS-01 and 1 letter with vehicle (p = 0.125). In a post-hoc analysis, there was a greater difference in patients with baseline BCVA ≤65 letters, the OCS-01 group improved 3.8 letters compared with 0.9 letters with vehicle. CONCLUSION Topical OCS-01 was significantly more effective than vehicle in improving central macular thickness in patients with DME. Visual improvement was better in eyes with lower baseline vision.
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Affiliation(s)
| | | | - Michael Larsen
- Eye Department, Rigshospitalet - Glostrup, Copenhagen, Denmark
| | - András Papp
- Department of Ophthalmology, Semmelweis University, Budapest, Hungary
| | - Kai Kaarniranta
- University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
| | - Marion R Munk
- Inselspital, University Hospital Bern, Bern, Switzerland.,Bern Photographic Reading Center, Inselspital, University Hospital Bern, Bern, Switzerland
| | - Pravin Dugel
- Keck School of Medicine, USC Roski Eye Institute, Los Angeles, California, USA
| | - Ramin Tadayoni
- Service d'Ophtalmologie Paris, Hopital Lariboisière, Paris, France
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Behrens CM, Malmqvist L, Jørgensen M, Sibony PA, Munch IC, Skovgaard AM, Larsen M, Hamann S. Peripapillary Hyperreflective Ovoid Mass-like Structures (PHOMS) in Children: The Copenhagen Child Cohort 2000 Eye Study. Am J Ophthalmol 2023; 245:212-221. [PMID: 36108799 DOI: 10.1016/j.ajo.2022.09.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/05/2022] [Accepted: 09/01/2022] [Indexed: 11/01/2022]
Abstract
PURPOSE To determine the prevalence of peripapillary hyperreflective ovoid mass-like structures (PHOMS) in a population-based child cohort and to study their association with other optic nerve head features and myopia. DESIGN Observational, population-based cohort study of 1407 children aged 11-12 years. METHODS Optical coherence tomography scans of optic nerve heads were graded for PHOMS, disc tilt, prelaminar hyperreflective lines, and scleral canal diameter and investigated for associated prenatal and ocular parameters. Children with optic disc drusen or optic disc edema were excluded. RESULTS PHOMS were found in 8.9% of children. The location of PHOMS was predominantly in the superonasal section of the optic disc. Myopia and optic nerve head tilt were more common in children with PHOMS than in children without PHOMS (P < .001 and P < .001, respectively). Prelaminar hyperreflective lines were found in 17.9% of children with PHOMS compared to 7.3% of children without PHOMS (P < .001). Prelaminar hyperreflective lines with and without PHOMS were associated with a shorter axial length of the eye (P < .001). There were no prenatal factors associated with PHOMS. Prelaminar hyperreflective lines were associated with higher birth weight and continued maternal smoking during pregnancy (P = .01 and P = .02, respectively). CONCLUSIONS PHOMS had a prevalence of 8.9% in healthy children without optic disc drusen or optic disc edema and was associated with increasing myopic refraction and the presence of a tilted optic nerve head and prelaminar hyperreflective lines. Given the high prevalence of PHOMS, they should not unreservedly be taken as evidence of optic neuropathy.
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Affiliation(s)
| | - Lasse Malmqvist
- Department of Ophthalmology, Rigshospitalet(C.M.B., L.M., M.J., M.L., S.H.), Glostrup, Denmark
| | - Morten Jørgensen
- Department of Ophthalmology, Rigshospitalet(C.M.B., L.M., M.J., M.L., S.H.), Glostrup, Denmark
| | - Patrick A Sibony
- Department of Ophthalmology, State University of New York at Stony Brook(P.A.S.), Stony Brook, New York, USA
| | - Inger Christine Munch
- Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital(I.C.M.), Copenhagen, Denmark
| | - Anne Mette Skovgaard
- National Institute of Public Health, Faculty of Health Sciences, University of Southern Denmark(A.M.S.), Copenhagen, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet(C.M.B., L.M., M.J., M.L., S.H.), Glostrup, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen(M.L., S.H.), Copenhagen, Denmark
| | - Steffen Hamann
- Department of Ophthalmology, Rigshospitalet(C.M.B., L.M., M.J., M.L., S.H.), Glostrup, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen(M.L., S.H.), Copenhagen, Denmark.
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Belmouhand M, Rothenbuehler SP, Dabbah S, Bjerager J, Sander B, Hjelmborg JB, Dalgård C, Jensen R, Larsen M. Small hard drusen and associated factors in early seniority. PLoS One 2022; 17:e0279279. [PMID: 36548342 PMCID: PMC9778563 DOI: 10.1371/journal.pone.0279279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 12/02/2022] [Indexed: 12/24/2022] Open
Abstract
PURPOSE The purpose of this study was to examine the ocular and systemic risk profile of the fundus phenotype ≥ 20 small hard (macular) drusen (< 63 μm in diameter). METHODS This single-center, cross-sectional study of 176 same-sex twin pairs aged 30 to 80 (median 60) years was a component of a framework study of the transition from not having age-related macular degeneration to having early AMD. Drusen categories assessed using fundus photography and optical coherence tomography included small hard drusen (diameter < 63 μm), intermediate soft drusen (63-125 μm), and large soft drusen (> 125 μm), of which the soft drusen are compatible with a diagnosis of AMD. RESULTS Having ≥ 20 small hard drusen within or outside the macula was associated with increasing age, lower body mass index, shorter axial length, hyperopia, female sex, increasing high-density lipoprotein (HDL), high alcohol consumption, and with the presence of soft drusen. CONCLUSIONS Having ≥ 20 small hard drusen was associated with some AMD-related risk factors, but not with smoking, increasing body mass index, and higher blood pressure. Having ≥ 20 small hard drusen was also associated with soft drusen, in agreement with previous studies. These findings suggest that small hard drusen are not an early manifestation of AMD but the product of a distinct process of tissue alteration that promotes the development of AMD or some subtype thereof.
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Affiliation(s)
- Mohamed Belmouhand
- Department of Ophthalmology, Rigshospitalet, Copenhagen University Hospital, Glostrup, Denmark
- Faculty of Health and Medical Science, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- * E-mail:
| | - Simon P. Rothenbuehler
- Department of Ophthalmology, Rigshospitalet, Copenhagen University Hospital, Glostrup, Denmark
- Department of Ophthalmology, University Hospital Basel, Basel, Switzerland
| | - Sami Dabbah
- Department of Ophthalmology, Rigshospitalet, Copenhagen University Hospital, Glostrup, Denmark
| | - Jakob Bjerager
- Department of Ophthalmology, Rigshospitalet, Copenhagen University Hospital, Glostrup, Denmark
| | - Birgit Sander
- Department of Ophthalmology, Rigshospitalet, Copenhagen University Hospital, Glostrup, Denmark
| | - Jacob B. Hjelmborg
- Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
- Danish Twin Research Center, University of Southern Denmark, Odense, Denmark
| | - Christine Dalgård
- Danish Twin Research Center, University of Southern Denmark, Odense, Denmark
- Clinical Pharmacology, Pharmacy and Environmental Medicine, Department of Public Health, University of Southern Denmark, Odense, Denmark
| | - Rasmus Jensen
- Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
- Department of Mathematics and Computer Science, University of Southern Denmark, Odense, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Copenhagen University Hospital, Glostrup, Denmark
- Faculty of Health and Medical Science, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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Belmouhand M, Rothenbuehler SP, Hjelmborg JB, Dabbah S, Bjerager J, Sander BA, Dalgård C, Larsen M. Heritability of retinal drusen in the Copenhagen Twin Cohort Eye Study. Acta Ophthalmol 2022; 100:e1561-e1568. [PMID: 35322936 PMCID: PMC9790204 DOI: 10.1111/aos.15136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 02/22/2022] [Accepted: 03/12/2022] [Indexed: 12/30/2022]
Abstract
PURPOSE To study age- and sex-adjusted heritability of small hard drusen and early age-related macular degeneration (AMD) in a population-based twin cohort. METHODS This was a single-centre, cross-sectional, classical twin study with ophthalmic examination including refraction, biometry, best-corrected visual acuity assessment, colour and autofluorescence fundus photography, and fundus optical coherence tomography. Grading and categorization of drusen was by diameter and location. RESULTS The study enrolled 176 same-sex pairs of twins of mean (SD) age 58.6 (9.9) years. The prevalence of the four phenotypes ≥20 small hard macular drusen (largest diameter < 63 μm), ≥20 small hard extramacular drusen, intermediate drusen (63-125 μm) anywhere, and large drusen (>125 μm) anywhere was 12.4%, 36.4%, 5.8%, and 8.4%, respectively, and the respective heritabilities, adjusted for age and sex, were 78.2% [73.5-82.9], 69.1% [62.3-75.9], 30.1% [4.1-56.1], and 65.6% [26.4-100]. Age trajectory analysis supported a gradual transition to larger numbers of small hard drusen with increasing age. The heritability of ≥20 small hard drusen was markedly lower than the 99% found in the 40% overlapping twin cohort that was seen 20 years earlier. CONCLUSION Numerous (≥20) small hard drusen and larger drusen that fit the definition of dry AMD were highly heritable. Small hard drusen counts increased with age. Decreasing heritability with increasing age suggests that the impact of behavioural and environmental factors on the development of small hard drusen increases with age.
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Affiliation(s)
- Mohamed Belmouhand
- Department of OphthalmologyRigshospitalet, Copenhagen University HospitalGlostrupDenmark,Department of Clinical Medicine, Faculty of Healthy and Medical ScienceUniversity of CopenhagenCopenhagenDenmark
| | - Simon Paul Rothenbuehler
- Department of OphthalmologyRigshospitalet, Copenhagen University HospitalGlostrupDenmark,Department of OphthalmologyUniversity Hospital BaselBaselSwitzerland
| | - Jacob B. Hjelmborg
- Epidemiology, Biostatistics and Biodemography, Department of Public HealthUniversity of Southern DenmarkOdenseDenmark,The Danish Twin Research CenterUniversity of Southern DenmarkOdenseDenmark
| | - Sami Dabbah
- Department of OphthalmologyRigshospitalet, Copenhagen University HospitalGlostrupDenmark,Department of OphthalmologyOdense University HospitalOdenseDenmark
| | - Jakob Bjerager
- Department of OphthalmologyRigshospitalet, Copenhagen University HospitalGlostrupDenmark
| | - Birgit Agnes Sander
- Department of OphthalmologyRigshospitalet, Copenhagen University HospitalGlostrupDenmark
| | - Christine Dalgård
- The Danish Twin Research CenterUniversity of Southern DenmarkOdenseDenmark,Department of Public Health, Clinical Pharmacology, Pharmacy and Environmental MedicineUniversity of Southern DenmarkOdenseDenmark
| | - Michael Larsen
- Department of OphthalmologyRigshospitalet, Copenhagen University HospitalGlostrupDenmark,Department of Clinical Medicine, Faculty of Healthy and Medical ScienceUniversity of CopenhagenCopenhagenDenmark
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Ba‐Ali S, Larsen M, Andersen HU, Lund‐Andersen H. Full-field and multifocal electroretinogram in non-diabetic controls and diabetics with and without retinopathy. Acta Ophthalmol 2022; 100:e1719-e1728. [PMID: 35661609 PMCID: PMC9795888 DOI: 10.1111/aos.15184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 05/05/2022] [Indexed: 12/30/2022]
Abstract
OBJECTIVE To compare retinal function assessed by full-field electroretinography (ffERG) and multifocal electroretinography (mfERG) in diabetes without retinopathy, diabetes with moderate non-proliferative diabetic retinopathy (NPDR) and in the absence of diabetes. METHODS Scotopic and photopic ffERG and mfERG was made in non-fasting volunteers, including 26 diabetic participants without retinopathy, 22 diabetic participants with moderate NPDR and 22 participants without diabetes using full International Society for Clinical Electrophysiology of Vision protocols. RESULTS Of the ffERG responses, significant deviation (p ≤ 0.05, corrected for multiple sampling and other relevant confounders) from the non-diabetic participants was seen in the diabetic participants only for the OP1-OP3 oscillatory amplitudes and the OP2 implicit time. This finding was independent of whether retinopathy was present or not. For the mfERG, minor amplitude or implicit time deviations were found for a small number of rings (R2, R4 and R5). Receiver of operating characteristic analysis showed that the single most prominent abnormality of the ffERG in diabetes, regardless of whether retinopathy was present or not, was the OP2 implicit time (area under the curve ≥ 0.80). CONCLUSION This bi-modal study of electroretinographic characteristics found that the most prominent anomaly associated with diabetes was a prolongation of the implicit time of the OP2 of the scotopic ffERG, while the most prominent added effect of non-proliferative diabetic retinopathy was a further prolongation of the OP2 implicit time. Although the variation in ERG characteristics is far too large for diagnostic purposes, the close association of the oscillatory potentials with the amacrine cells of the retina indicate that their function is particularly sensitive to diabetes.
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Affiliation(s)
- Shakoor Ba‐Ali
- Department of OphthalmologyRigshospitaletGlostrupDenmark,Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Michael Larsen
- Department of OphthalmologyRigshospitaletGlostrupDenmark,Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | | | - Henrik Lund‐Andersen
- Department of OphthalmologyRigshospitaletGlostrupDenmark,Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark,Steno Diabetes CenterCopenhagenDenmark
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Olijhoek D, Hellwing A, Noel S, Lund P, Larsen M, Weisbjerg M, Børsting C. Feeding up to 91% concentrate to Holstein and Jersey dairy cows: Effects on enteric methane emission, rumen fermentation and bacterial community, digestibility, production, and feeding behavior. J Dairy Sci 2022; 105:9523-9541. [DOI: 10.3168/jds.2021-21676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 07/11/2022] [Indexed: 11/17/2022]
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31
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Eckmann‐Hansen C, Bek T, Sander B, Larsen M. Vision-related quality of life and visual ability in patients with autosomal dominant optic atrophy. Acta Ophthalmol 2022; 100:797-804. [PMID: 35146926 PMCID: PMC9790332 DOI: 10.1111/aos.15102] [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] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 12/07/2021] [Accepted: 01/20/2022] [Indexed: 12/30/2022]
Abstract
PURPOSE The purpose of the study was to evaluate vision-related quality of life and visual ability in patients with OPA1 autosomal dominant optic atrophy (ADOA). METHODS This cross-sectional, observational study included 145 participants with a mutation in the OPA1 gene associated with ADOA, 63 mutation-free first-degree relatives and 92 healthy subjects unrelated to the families. Participants underwent a clinical eye examination, and adult participants completed the National Eye Institute Visual Function Questionnaire (NEI-VFQ-39), while children completed the Cardiff Visual Ability Questionnaire for Children (CVAQC). RESULTS In adults with ADOA, both mean visual acuity (VA) and mean contrast sensitivity (CS) were significantly inferior to both first-degree relatives and unrelated controls (p < 0.001). In children with ADOA, mean VA was significantly lower compared with first-degree relatives (p = 0.0052), whereas CS was not (0.127). Adults with ADOA scored lower than both comparator groups on composite score (p < 0.001), general health subscale (p = 0.0075) and all vision-related subscales (p < 0.001) except the ocular pain subscale (p = 0.2). In children with ADOA, the median CVAQC logit score was significantly lower compared with first-degree relatives (p = 0.037). The science lessons subscale was significantly lower for children with ADOA compared with first-degree relatives (p = 0.046), as well as the language lessons subscale (p = 0.038). For adults, composite score and subscale scores were significantly associated with both VA, CS and fixation status. CONCLUSION OPA1 mutation is associated with lower quality of life and visual ability in patients with ADOA compared with both first-degree relatives and unrelated controls. VA, CS and fixation status affect quality of life in patients with ADOA.
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Affiliation(s)
- Christina Eckmann‐Hansen
- Department of OphthalmologyRigshospitaletGlostrupDenmark,Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Toke Bek
- Department of OphthalmologyAarhus University HospitalAarhusDenmark
| | - Birgit Sander
- Department of OphthalmologyRigshospitaletGlostrupDenmark
| | - Michael Larsen
- Department of OphthalmologyRigshospitaletGlostrupDenmark,Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
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Rothenbuehler SP, Malmqvist L, Belmouhand M, Bjerager J, Maloca PM, Larsen M, Hamann S. Comparison of Spectral-Domain OCT versus Swept-Source OCT for the Detection of Deep Optic Disc Drusen. Diagnostics (Basel) 2022; 12:diagnostics12102515. [PMID: 36292204 PMCID: PMC9600200 DOI: 10.3390/diagnostics12102515] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 10/10/2022] [Accepted: 10/13/2022] [Indexed: 11/17/2022] Open
Abstract
Deep optic disc drusen (ODD) are located below Bruch’s membrane opening (BMO) and may go undetected due to the challenges in imaging them. The purpose of this study is a head-to-head comparison of currently widely used imaging technologies: swept-source optical coherence tomography (SS-OCT; DRI OCT-1 Triton, Topcon) and enhanced depth imaging spectral-domain optical coherence tomography (EDI SD-OCT; Spectralis OCT, Heidelberg Engineering) for the detection of deep ODD and associated imaging features. The eyes included in this study had undergone high-resolution imaging via both EDI SD-OCT and SS-OCT volume scans, which showed at least one deep ODD or a hyperreflective line (HL). Grading was performed by three graders in a masked fashion. The study findings are based on 46 B-scan stacks of 23 eyes including a total of 7981 scans. For scan images with ODD located above or below the level of BMO, no significant difference was found between the two modalities compared in this study. However, for HLs and other features, EDI SD-OCT scan images had better visualization and less artifacts. Although SS-OCT offers deep tissue visualization, it did not appear to offer any advantage in ODD detection over a dense volume scan via EDI SD-OCT with B-scan averaging.
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Affiliation(s)
- Simon P. Rothenbuehler
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, 2600 Glostrup, Denmark
- Department of Ophthalmology, OCTlab, University Hospital Basel, 4031 Basel, Switzerland
- Correspondence: ; Tel.: +41-61-265-87-87
| | - Lasse Malmqvist
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, 2600 Glostrup, Denmark
| | - Mohamed Belmouhand
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, 2600 Glostrup, Denmark
| | - Jakob Bjerager
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, 2600 Glostrup, Denmark
| | - Peter M. Maloca
- Department of Ophthalmology, OCTlab, University Hospital Basel, 4031 Basel, Switzerland
- Institute of Molecular and Clinical Ophthalmology Basel (IOB), 4031 Basel, Switzerland
- Moorfields Eye Hospital NHS Foundation Trust, London EC1V 2PD, UK
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, 2600 Glostrup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Steffen Hamann
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, 2600 Glostrup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
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Torm MEW, Eckmann-Hansen C, Christensen SK, Larsen M. A UNILATERAL FOVEAL VITELLIFORM LESION IN A CHOROIDEREMIA CARRIER. Retin Cases Brief Rep 2022; 16:663-666. [PMID: 33003127 PMCID: PMC9394496 DOI: 10.1097/icb.0000000000001062] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To describe a unilateral foveal vitelliform lesion associated with subnormal visual acuity in a choroideremia carrier. METHODS A retrospective case report, assessment of the best-corrected visual acuity, fundus photography, wide-angle scanning laser ophthalmoscopy, optical coherence tomography, and microperimetry. RESULTS A 37-year-old woman with a pathogenic 907C>T mutation in the choroideremia gene encoding Rab escort protein-1 presented with blurred vision in her left eye.The Snellen best-corrected visual acuity was 20/20 in the right eye and 20/32 in the left eye, a unilateral decrease because it was 20/20 in both eyes at the most recent examination nine years earlier. In the left eye, a large vitelliform lesion with a diameter of 1,300 µ m had developed in the fovea, whereas in the right eye, a smaller similar lesion was seen close to the fovea. Both eyes showed classical radial patterns of multiple bright fundus patches with associated autofluorescence defects and focal drusenoid lesions of the outer retina. CONCLUSION With its large size and foveal location the vitelliform lesion in this patient's left eye is an unusual manifestation in an otherwise common Rab escort protein-1 mutation carrier state, and its unilaterality fits the assumption of random X-chromosome inactivation.
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Affiliation(s)
- Marie E. W. Torm
- Department of Ophthalmology, Rigshospitalet, Valdemar Hansens Vej 13, Glostrup, Denmark; and
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Copenhagen, Denmark.
| | - Christina Eckmann-Hansen
- Department of Ophthalmology, Rigshospitalet, Valdemar Hansens Vej 13, Glostrup, Denmark; and
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Copenhagen, Denmark.
| | - Søren K. Christensen
- Department of Ophthalmology, Rigshospitalet, Valdemar Hansens Vej 13, Glostrup, Denmark; and
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Valdemar Hansens Vej 13, Glostrup, Denmark; and
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Copenhagen, Denmark.
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Chaudhary RK, Larsen M, Nepal P, Songmen S, Gupta E, Sapire J. Bilateral subdiaphragmatic renal ectopia with associated congenital anomalies: a case report and systematic review of cases. Egypt J Radiol Nucl Med 2022. [DOI: 10.1186/s43055-022-00887-w] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Cephalad renal ectopia is rare. Ectopic kidneys besides being prone to various pathologies are occasionally associated with other congenital abnormalities. To the best our knowledge, at the time of this writing, only ten cases of bilateral subdiaphragmatic renal ectopia had been reported.
Case presentation: We present a rare case of bilateral subdiaphragmatic ectopic kidneys incidentally discovered during evaluation of the abdominal pain. In addition, our patient had associated anomalies of the liver, spleen and mesocardia.
Conclusions
Recognition of this condition is important for accurate diagnosis, surgical and/or intervention planning, as well as identifying other associated anomalies.
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Wang W, Larsen M, Weisbjerg M, Johansen M, Hellwing A, Lund P. Effects of particle size and toasting of fava beans and forage source on nutrient digestibility, ruminal fermentation, and metabolizable protein supply in dairy cows. J Dairy Sci 2022; 105:8806-8823. [DOI: 10.3168/jds.2021-21653] [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] [Received: 12/01/2021] [Accepted: 06/13/2022] [Indexed: 11/19/2022]
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Belmouhand M, Rothenbuehler SP, Bjerager J, Dabbah S, Hjelmborg JB, Munch IC, Dalgård C, Larsen M. Heritability and risk factors of incident small and large drusen in the Copenhagen Twin Cohort Eye Study: a 20-year follow-up. Ophthalmologica 2022; 245:421-430. [PMID: 35878587 DOI: 10.1159/000525652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 05/16/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION The transition from a normal fundus to one with early drusen (≥ 20 small hard drusen) to age-related macular degeneration (AMD) in the form of drusen ≥ 63 µm in diameter is of interest, because small hard drusen may be precursors of large drusen. Study of AMD precursors lesions may provide valuable insight into factors that initiate AMD. Here, the progression of drusen was studied over an interval of 20 years in a population-based twin cohort. METHODS Single-center, 20-year follow-up of 138 twins, including biometry, fundus optical coherence tomography, and fundus photography. Macular characteristics were hierarchically classified as (per eye) 1) < 20 small hard drusen, 2) ≥ 20 small hard drusen, 3) drusen ≥ 63 µm, or 4) ≥ 20 small hard drusen combined with drusen ≥ 63 µm. Additive and dominant genetic effects as well as shared and non-shared environmental effects were analyzed in a bivariate biprobit model with a classic liability-threshold approach and polygenic modeling with random effects. RESULTS Median participant age was 59 (range 41 - 66) years. Of 25 (18%) cases of incident macular drusen, 7 had ≥ 20 small hard drusen, and 18 had drusen ≥ 63 µm at follow-up, whereas no participant had developed both traits simultaneously. Smoking was associated with incident ≥ 20 small hard drusen (p = 0.04) and incident drusen ≥ 63 µm (p = 0.003). Having ≥ 20 small hard drusen at baseline was associated with incident drusen ≥ 63 µm at follow-up (p = 0.02). Development of drusen ≥ 63 µm was attributable to 49% genetic effects and 51% environmental effects. CONCLUSION The risk of progressing from 0-19 small hard macular drusen per eye to having ≥ 20 small hard drusen or drusen ≥ 63 µm at follow-up was associated with smoking and genetic predisposition. Having ≥ 20 small hard drusen in the absence of drusen ≥ 63 µm at baseline was associated with incident drusen ≥ 63 µm when examined 20 years later. The study confirms that small hard macular drusen is a forewarning of AMD and that progression to AMD may be hindered by avoidance of smoking.
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Affiliation(s)
- Mohamed Belmouhand
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Simon Paul Rothenbuehler
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Ophthalmology, University Hospital Basel, Basel, Switzerland
| | - Jakob Bjerager
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
| | - Sami Dabbah
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Ophthalmology, Odense University Hospital, Odense, Denmark
| | - Jacob B Hjelmborg
- Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
- Danish Twin Research Center, University of Southern Denmark, Odense, Denmark
| | - Inger Christine Munch
- Centre for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | - Christine Dalgård
- Danish Twin Research Center, University of Southern Denmark, Odense, Denmark
- Clinical Pharmacology, Pharmacy and Environmental Medicine, Department of Public Health, University of Southern Denmark, Odense, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
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Bjerager J, Dabbah S, Belmouhand M, Kessel L, Hougaard JL, Rothenbuehler SP, Sander B, Larsen M. Long-term development of lens fluorescence in a twin cohort: Heritability and effects of age and lifestyle. PLoS One 2022; 17:e0268458. [PMID: 35617652 PMCID: PMC9135443 DOI: 10.1371/journal.pone.0268458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 04/30/2022] [Indexed: 11/20/2022] Open
Abstract
The blue-green autofluorescence of the ocular lens increases with age, glycemia and smoking, as the irreplaceable structural proteins of the lens slowly accumulate damage from the encounter with reactive molecular species. We have conducted a prospective study of lens autofluorescence over two decades in a twin cohort. The study included 131 phakic, non-diabetic adult twins (median age at follow-up 58 years, range 41-66 years) who were examined twice at an interval of 21 years. Change in anterior lens peak autofluorescence was analyzed in relation to age, current and baseline glycemia, cumulative smoking and heritability. The level of lens autofluorescence in the study population increased as a function of age and smoking (p ≤.002), but not as a function of glycemia (p ≥.069). Lens autofluorescence remained a highly heritable trait (90.6% at baseline and 93.3% at follow-up), but whereas the combined effect of age and cumulative smoking explained 57.2% of the variance in lens autofluorescence at baseline in mid-life, it only accounted for 31.6% at follow-up 21 years later. From mid to late adulthood, the level of blue-green fluorescence remained overwhelmingly heritable, but became less predictable from age, smoking habits and glycemic status. Presumably, as the lens ages, its intrinsic characteristics come to dominate over environmental and systemic factors, perhaps in a prelude to the development of cataract.
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Affiliation(s)
- Jakob Bjerager
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
| | - Sami Dabbah
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Department of Ophthalmology, Odense University Hospital, Odense, Denmark
| | | | - Line Kessel
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Faculty of Health and Medical Sciences, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Jesper Leth Hougaard
- Department of Clinical Sciences, Ophthalmology in Malmö, Lund University, Malmö, Sweden
| | - Simon P. Rothenbuehler
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- University Hospital Basel, Basel, Switzerland
| | - Birgit Sander
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
- Faculty of Health and Medical Sciences, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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Larsen M, Morales-Ghinaglia N, He F, Imamura Y, Berg A, Vgontzas A, Liao D, Bixler E, Fernandez-Mendoza J. 0031 Sleep Regularity is Associated with DNA Methylation in Cognitive, Cardiovascular and Mood-related Genes: A GWAS-informed Study in Adolescents. Sleep 2022. [DOI: 10.1093/sleep/zsac079.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Adolescence is associated with a delay in the circadian timing of sleep. However, social factors prevent adolescents from adapting to a later sleep-wake pattern, leading to different forms of circadian misalignment that may increase the risk of cardiovascular and mental health disorders. Several GWAS have identified genes associated with sleep and circadian phenotypes, however, little is known regarding the epigenetic basis and significance of sleep timing and its regularity in adolescence.
Methods
We analyzed data from 230 adolescents from the Penn State Child Cohort follow-up study who provided a blood sample for DNA extraction and had complete at-home 7-night (at least 3) actigraphy (ACT) data. ACT-measured sleep midpoint was calculated as the intra-individual mean of the 7-night midpoint (zeroed to midnight) of the sleep period. ACT-measured sleep regularity was calculated as the intra-individual standard deviation of the 7-night sleep midpoint. Epigenome-wide single nucleotide resolution of DNA methylation in cytosine-phosphate-guanine (CpG) sites and surrounding regions were obtained from peripheral leukocytes. This study focuses on methylation sites in GWAS-informed genes previously associated with sleep and circadian phenotypes. Linear regression assessed the association between sleep midpoint and sleep regularity with site-specific methylation levels, adjusting for sex, age, race/ethnicity, body mass index, and psychotropic medication use. Using the Benjamini & Hochberg method to adjust for a false discovery rate. Adjusted p-values are reported as q-values.
Results
Sleep midpoint was not associated with a significant change in methylation at any of the measured intragenic sites. Sleep regularity was significantly associated with differential methylation at 238 intragenic sites in 147 genes with an adjusted p<0.05, of which, three sites were within GWAS-informed sleep/circadian-related genes. Higher sleep irregularity was associated with hypermethylation in MAD1L1 (q=2.4x10-2) and with hypomethylation in CALN1 (q=3.8 x 10-4) and ZNF618 (q=3.8 x 10-2).
Conclusion
Sleep irregularity is associated with altered DNA methylation in genes previously identified in GWAS of sleep/circadian phenotypes. Our data provides evidence for a potential epigenetic link between sleep irregularity and genes involved in neurocognitive functioning (CALN1), internalizing disorders (MAD1L1) and blood pressure (ZNF618).
Support (If Any)
National Institutes of Health (R01HL136587, R01MH118308, UL1TR000127)
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Affiliation(s)
| | | | - Fan He
- Penn State College of Medicine
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Larsen M, He F, Imamura Y, Berg A, Vgontzas A, Liao D, Bixler E, Fernandez-Mendoza J. 0032 Objective and Subjective Measures of Sleep Initiation are Differentially Associated with DNA Methylation in Adolescents. Sleep 2022. [DOI: 10.1093/sleep/zsac079.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
The onset of puberty is associated with a shift in the circadian timing of sleep leading to delayed sleep initiation [i.e., later sleep onset time (SOT)] driven by later bedtimes and/or longer sleep onset latency (SOL). Subjective sleep initiation, as per self-reports, and objective sleep initiation, as per actigraphy (ACT) or polysomnography (PSG), assess equally relevant but different domains of the same physiological process. Several GWAS have identified genes associated with sleep and circadian phenotypes; however, little is known regarding the epigenetic basis and significance of delayed sleep initiation in adolescence, a critical developmental period.
Methods
We analyzed data from 263 adolescents from the Penn State Child Cohort follow-up study who had complete subjective (self-reported questionnaires), at-home 7-night ACT, and in-lab 9-hour PSG data for bedtime, SOL and SOT. Epigenome-wide single-nucleotide resolution of DNA methylation in cytosine-phosphate-guanine (CpG) sites and surrounding regions were obtained from peripheral leukocytes. Linear regression assessed the association between bedtime, SOL and SOT with site-specific methylation levels, adjusting for sex, age, race/ethnicity, body mass index, and psychotropic medication use. P-values were adjusted using the Benjamini & Hochberg method to correct for false discovery rate and, thus, q-values are reported.
Results
Exome-wide analysis showed differential methylation in 1450 unique genes across the 9 sleep measurements, while GWAS-informed analysis yielded 57 genes. Gene hits were identified for bedtime (PSG), SOL (subjective, ACT and PSG) and SOT (subjective and PSG): 14 genes were associated with both subjective and PSG-measured SOL, 34 with both ACT- and PSG-measured SOL, and one (TBC1D22A) with subjective, ACT- and PSG-measured SOL. One gene (ABTB2) was associated with subjective and PSG-measured SOT.
Conclusion
Objective and subjective sleep initiation in adolescents is associated with altered DNA methylation in genes previously identified in adult GWAS of sleep and circadian phenotypes. Our data provides evidence for a potential epigenetic link between habitual (subjective and ACT) SOL and in-lab SOT and DNAm in genes involved in circadian regulation (i.e., RASD1, RAI1), metabolism (i.e., FADS1, WNK1, SLC5A6), and neuropsychiatric disorders (i.e., PRR7, SDK1, FAM172A).
Support (If Any)
National Institutes of Health (R01HL136587, R01MH118308, UL1TR000127)
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Affiliation(s)
| | - Fan He
- Penn State College of Medicine
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40
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Morales-Ghinaglia N, Larsen M, Calhoun S, He F, Liao J, Vgontzas A, Bixler E, Liao D, Fernandez-Mendoza J. 0219 Interplay of School Days and Free Days with Sleep Midpoint on the Association of Visceral Adiposity with Blood Pressure in Adolescents. Sleep 2022. [DOI: 10.1093/sleep/zsac079.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
The circadian timing of sleep, including its variability, has emerged as an important contributor to obesity and cardiovascular health, such as elevated blood pressure. Adolescence is a particularly vulnerable period for circadian misalignment, which may express differently if youth are in school or on free-days. We examined whether deviations in sleep midpoint increase the impact of visceral adiposity on elevated blood pressure in adolescents as a function of being entrained to school or not.
Methods
We analyzed cross-sectional data from the Penn State Child Cohort follow-up study, a random population-based sample of 303 adolescents (16.2 ± 2.2 y; 47.5% female; 21.5% minority). Actigraphy-measured sleep midpoint was calculated as the midpoint (zeroed to midnight) of the sleep period for weekdays (5-nights) and weekends (2-nights). Actigraphy-measured sleep regularity was calculated as the intra-individual standard deviation of the 5-night weekdays sleep midpoint. Visceral adipose tissue (VAT) was measured via dual-energy X-ray absorptiometry scan. Systolic (SBP) and diastolic (DBP) blood pressure was measured three times in the seated position. Multivariable linear regression models were stratified by “in school” and “on break” to test sleep midpoint and sleep regularity as effect modifiers of VAT on SBP/DBP levels. Analyses were adjusted for sex, race/ethnicity, age, actigraphy-measured sleep duration and polysomnography-measured apnea/hypopnea index.
Results
When participants were studied while “in school”, significant interactions were found between VAT and weekdays sleep midpoint on SBP (p-interaction=0.027) and DBP (p-interaction=0.046), so that the later the sleep midpoint on school days, the greater the association of VAT with SBP/DBP. When participants were studied while “on break”, a significant interaction was found between VAT and weekdays sleep regularity on SBP (p-interaction=0.039), so that the higher the sleep irregularity on weekdays, the greater the association of VAT with SBP. No other significant interactions were found.
Conclusion
A delayed and an irregular sleep midpoint during school days and during breaks, respectively, best identified those adolescents with greater cardiovascular risk associated with visceral obesity. These data suggest that not only the circadian timing of sleep contributes to adverse cardiovascular outcomes but its distinct biomarkers require measurement under different entrainment conditions in adolescents.
Support (If Any)
National Institutes of Health (R01HL136587, UL1TR000127)
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Affiliation(s)
| | | | | | - Fan He
- Penn State College of Medicine
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Becker D, Larsen M, Lund-Andersen H, Hamann S. Diabetic papillopathy in patients with optic disc drusen: Description of two different phenotypes. Eur J Ophthalmol 2022:11206721221100901. [PMID: 35570569 DOI: 10.1177/11206721221100901] [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: 11/16/2022]
Abstract
PURPOSE To describe two cases of severe acute bilateral optic disc edema that occurred in patients with diabetes mellitus shortly after the initiation of intensified antihyperglycemic therapy. METHODS Retrospective observational case report. CASE DESCRIPTION Two patients with type 1 diabetes presented for routine retinopathy screening with asymptomatic optic disc edema. One case was bilateral, the other unilateral. Neither patient had visual complaints. Both patients' glycemia history was characterized by a recent bout of poor regulation and both had optic disc edema consistent with diabetic papillopathy in combination with prominent Optic disc drusen (ODD). The swelling that appeared to constitute the edematous diabetes-related component of the disease resolved within 10-12 weeks during which diabetes therapy was optimized. Visual field deficits were seen early on in both patients and had resolved to some extent in one patient after 9 months but persisted in the one affected eye in the other patient up to at least 30 months. CONCLUSION Two cases of ODD-associated diabetic papillopathy were observed: One with classic, bilateral disc edema and minor visual field defects, the other with unilateral disc edema, severe visual field defects and a phenotype that resembled non-arteritic anterior ischemic optic neuropathy. The cases suggest that ODD may increase the risk of diabetic papillopathy, a condition that is associated with rapid glycemia reduction and crowded optic discs, which may combine to produce nerve fiber swelling and hypoperfusion with venous congestion in a compartment with limited room for expansion.
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Affiliation(s)
- Daniel Becker
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark.,Faculty of Health and Medical Sciences, 70590University of Copenhagen, Copenhagen, Denmark
| | - Henrik Lund-Andersen
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark.,Faculty of Health and Medical Sciences, 70590University of Copenhagen, Copenhagen, Denmark
| | - Steffen Hamann
- Department of Ophthalmology, Rigshospitalet, Glostrup, Denmark.,Faculty of Health and Medical Sciences, 70590University of Copenhagen, Copenhagen, Denmark
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Franchi G, Larsen M, Herskin M, Foldager L, Larsen M, Jensen M. Effects of changes in diet energy density and milking frequency and a single injection of cabergoline at dry-off on feeding behavior and rumination time in dairy cows. JDS Communications 2022; 3:195-200. [PMID: 36338816 PMCID: PMC9623666 DOI: 10.3168/jdsc.2021-0162] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 01/10/2022] [Indexed: 11/26/2022]
Abstract
Diluting the lactation diet with straw induced feeding behavior changes. Behavioral effects of gradual milking cessation were unclear. Cabergoline induced a reduction in feeding behavior lasting approximately 24 h.
Dry-off is a typical management practice, but research on the effects of dry-off on feeding behavior in high-yielding cows is limited. The present study investigated the effects of 2 diet energy densities: lactation diet (normal energy density, NORM) versus a lactation diet diluted with 30% straw (reduced energy density, REDU), both offered ad libitum, and 2 daily milking frequencies (2× vs. 1×) during the 7 d before dry-off day (d 0), and the effects of an injection of either a dopamine agonist [cabergoline (CAB); Velactis, Ceva Santé Animale; labeled for use only with abrupt dry-off; i.e., no reduction in feeding level or milking frequency before the last milking] or saline (SAL) following the last milking on d 0 (2 × 2 × 2 factorial arrangement), on automatically monitored feeding behavior and rumination time in 119 clinically healthy, loose-housed, pregnant, lactating Holstein cows during the week before and after d 0. From d 0, all cows were fed the same dry-cow diet ad libitum. Data were analyzed in R using mixed-effects models. Over the days before d 0, REDU cows spent 30% more time feeding at a 50% lower feeding rate, visited both assigned and unassigned feed bins more frequently, and spent more time ruminating than NORM cows. No clear behavioral effects of reduced milking frequency were found. Within 24 h following injection, CAB cows spent approximately 40% less time feeding at a lower feeding rate, visited their feed bin 28% less often, and spent 40% less time ruminating than SAL cows, irrespective of treatment before dry-off. The current study demonstrates that reducing diet energy density for 1 wk before dry-off led to clear behavioral changes in high-yielding cows. Administering CAB after the last milking induced decreased feeding behavior lasting approximately 24 h, indicating collateral effects other than reduced prolactin secretion.
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Affiliation(s)
- G.A. Franchi
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| | - M.L.V. Larsen
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| | - M.S. Herskin
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| | - L. Foldager
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
- Bioinformatics Research Centre, Aarhus University, C.F. Møllers Allé 8, 8000 Aarhus, Denmark
| | - M. Larsen
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| | - M.B. Jensen
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
- Corresponding author:
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Pfaff R, Kudeki E, Freudenreich H, Rowland D, Larsen M, Klenzing J. Dual Sounding Rocket and C/NOFS Satellite Observations of DC Electric Fields and Plasma Density in the Equatorial E- and F-Region Ionosphere at Sunset. J Geophys Res Space Phys 2022; 127:e2021JA030191. [PMID: 35860290 PMCID: PMC9285688 DOI: 10.1029/2021ja030191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 03/30/2022] [Accepted: 04/01/2022] [Indexed: 06/15/2023]
Abstract
E × B plasma drifts and plasma number density were measured on two NASA rockets launched simultaneously at sunset from Kwajalein Atoll with apogees of 182 and 331 km, with similar, coincident measurements gathered on the Communications/Navigation Outage Forecasting System (C/NOFS) satellite at 390 km. The combined measurements portray a highly dynamic ionosphere in a narrow range of local time and altitude, providing evidence of vortex-like motions. Although the vertical plasma drift was upwards, its magnitude was not constant, increasing between ∼150 and 250 km altitude where the plasma density was reduced. The zonal plasma drifts displayed a shear with altitude, changing from eastward to westward flow below 270 km, coincident with the larger upward drifts and consistent with the maintenance of the vortex flow. The plasma density on the western flank was highly structured compared to the eastern flank, despite the fact that the western region corresponded to slightly earlier local times. These observations illustrate that the low latitude ionosphere at sunset must be considered as an ensemble of interconnected flows encompassing an evolving "theater," as opposed to a background that simply unfolds linearly with respect to local time. The observations also underscore how satellites at high altitudes do not capture the highly dynamic ionosphere and thermosphere at the lower altitudes which are critical for understanding the electrodynamics system. Such motions set the stage for large scale plasma instabilities to form later in the evening, as observed by radars at Kwajalein and subsequent passes of the C/NOFS satellite.
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Affiliation(s)
- R. Pfaff
- NASA Goddard Space Flight CenterGreenbeltMDUSA
| | | | | | - D. Rowland
- NASA Goddard Space Flight CenterGreenbeltMDUSA
| | | | - J. Klenzing
- NASA Goddard Space Flight CenterGreenbeltMDUSA
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Correa-Luna M, Johansen M, Noziere P, Chantelauze C, Nasrollahi SM, Lund P, Larsen M, Bayat AR, Crompton LA, Reynolds CK, Froidmont E, Edouard N, Dewhurst R, Bahloul L, Martin C, Cantalapiedra-Hijar G. Nitrogen isotopic discrimination as a biomarker of between-cow variation in the efficiency of nitrogen utilization for milk production: A meta-analysis. J Dairy Sci 2022; 105:5004-5023. [PMID: 35450714 DOI: 10.3168/jds.2021-21498] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 02/21/2022] [Indexed: 11/19/2022]
Abstract
Estimating the efficiency of N utilization for milk production (MNE) of individual cows at a large scale is difficult, particularly because of the cost of measuring feed intake. Nitrogen isotopic discrimination (Δ15N) between the animal (milk, plasma, or tissues) and its diet has been proposed as a biomarker of the efficiency of N utilization in a range of production systems and ruminant species. The aim of this study was to assess the ability of Δ15N to predict the between-animal variability in MNE in dairy cows using an extensive database. For this, 20 independent experiments conducted as either changeover (n = 14) or continuous (n = 6) trials were available and comprised an initial data set of 1,300 observations. Between-animal variability was defined as the variation observed among cows sharing the same contemporary group (CG; individuals from the same experimental site, sampling period, and dietary treatment). Milk N efficiency was calculated as the ratio between mean milk N (grams of N in milk per day) and mean N intake (grams of N intake per day) obtained from each sampling period, which lasted 9.0 ± 9.9 d (mean ± SD). Samples of milk (n = 604) or plasma (n = 696) and feeds (74 dietary treatments) were analyzed for natural 15N abundance (δ15N), and then the N isotopic discrimination between the animal and the dietary treatment was calculated (Δ15n = δ15Nanimal - δ15Ndiet). Data were analyzed through mixed-effect regression models considering the experiment, sampling period, and dietary treatment as random effects. In addition, repeatability estimates were calculated for each experiment to test the hypothesis of improved predictions when MNE and Δ15N measurements errors were lower. The considerable protein mobilization in early lactation artificially increased both MNE and Δ15N, leading to a positive rather than negative relationship, and this limited the implementation of this biomarker in early lactating cows. When the experimental errors of Δ15N and MNE decreased in a particular experiment (i.e., higher repeatability values), we observed a greater ability of Δ15N to predict MNE at the individual level. The predominant negative and significant correlation between Δ15N and MNE in mid- and late lactation demonstrated that on average Δ15N reflects MNE variations both across dietary treatments and between animals. The root mean squared prediction error as a percentage of average observed value was 6.8%, indicating that the model only allowed differentiation between 2 cows in terms of MNE within a CG if they differed by at least 0.112 g/g of MNE (95% confidence level), and this could represent a limitation in predicting MNE at the individual level. However, the one-way ANOVA performed to test the ability of Δ15N to differentiate within-CG the top 25% from the lowest 25% individuals in terms of MNE was significant, indicating that it is possible to distinguish extreme animals in terms of MNE from their N isotopic signature, which could be useful to group animals for precision feeding.
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Affiliation(s)
- M Correa-Luna
- Université Clermont Auvergne, INRAE, UMR Herbivores, F-63000 Clermont-Ferrand, France
| | - M Johansen
- Department of Animal Science, Aarhus University, AU Foulum, PO Box 50, DK-8830, Tjele, Denmark
| | - P Noziere
- Université Clermont Auvergne, INRAE, UMR Herbivores, F-63000 Clermont-Ferrand, France
| | - C Chantelauze
- Université Clermont Auvergne, INRAE, UMR Herbivores, F-63000 Clermont-Ferrand, France; Université Clermont Auvergne, INRAE, UNH, Plateforme d'Exploration du Métabolisme, MetaboHUB, Clermont, F-63000 Clermont-Ferrand, France
| | - S M Nasrollahi
- Université Clermont Auvergne, INRAE, UMR Herbivores, F-63000 Clermont-Ferrand, France
| | - P Lund
- Department of Animal Science, Aarhus University, AU Foulum, PO Box 50, DK-8830, Tjele, Denmark
| | - M Larsen
- Department of Animal Science, Aarhus University, AU Foulum, PO Box 50, DK-8830, Tjele, Denmark
| | - A R Bayat
- Milk Production Solutions, Production Systems, Natural Resources Institute Finland (Luke), FI 31600 Jokioinen, Finland
| | - L A Crompton
- Centre for Dairy Research, Department of Animal Sciences, School of Agriculture, Policy, and Development, University of Reading, Reading, RG6 6AH, United Kingdom
| | - C K Reynolds
- Centre for Dairy Research, Department of Animal Sciences, School of Agriculture, Policy, and Development, University of Reading, Reading, RG6 6AH, United Kingdom
| | - E Froidmont
- Walloon Agricultural Research Center (CRA-W), B-5030 Gembloux, Belgium
| | - N Edouard
- INRAE, Agrocampus-Ouest, PEGASE, 35590 Saint-Gilles, France
| | - R Dewhurst
- SRUC, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - L Bahloul
- Adisseo France S.A.S., 92160 Antony, France
| | - C Martin
- Université Clermont Auvergne, INRAE, UMR Herbivores, F-63000 Clermont-Ferrand, France
| | - G Cantalapiedra-Hijar
- Université Clermont Auvergne, INRAE, UMR Herbivores, F-63000 Clermont-Ferrand, France.
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45
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Nakamura A, Wong YF, Venturato A, Michaut M, Venkateswaran S, Santra M, Gonçalves C, Larsen M, Leuschner M, Kim YH, Brickman J, Bradley M, Grapin-Botton A. Long-term feeder-free culture of human pancreatic progenitors on fibronectin or matrix-free polymer potentiates β cell differentiation. Stem Cell Reports 2022; 17:1215-1228. [PMID: 35452596 PMCID: PMC9133655 DOI: 10.1016/j.stemcr.2022.03.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 11/26/2022] Open
Abstract
With the aim of producing β cells for replacement therapies to treat diabetes, several protocols have been developed to differentiate human pluripotent stem cells to β cells via pancreatic progenitors. While in vivo pancreatic progenitors expand throughout development, the in vitro protocols have been designed to make these cells progress as fast as possible to β cells. Here, we report on a protocol enabling a long-term expansion of human pancreatic progenitors in a defined medium on fibronectin, in the absence of feeder layers. Moreover, through a screening of a polymer library we identify a polymer that can replace fibronectin. Our experiments, comparing expanded progenitors to directly differentiated progenitors, show that the expanded progenitors differentiate more efficiently into glucose-responsive β cells and produce fewer glucagon-expressing cells. The ability to expand progenitors under defined conditions and cryopreserve them will provide flexibility in research and therapeutic production. hPSC-derived pancreatic progenitors can be expanded long term without feeders Expansion can be achieved on fibronectin or on a polymer identified by screening Expansion enables increased NKX6-1 expression, which is crucial for β cell generation Expansion potentiates glucose-responsive β-like cells and decreases α cells
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Affiliation(s)
- Akiko Nakamura
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Yan Fung Wong
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark; The Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | | | - Magali Michaut
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | | | - Mithun Santra
- School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Carla Gonçalves
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Michael Larsen
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Marit Leuschner
- Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany
| | - Yung Hae Kim
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark; Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany
| | - Joshua Brickman
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark; The Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Mark Bradley
- School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Anne Grapin-Botton
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark; Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany; The Paul Langerhans Institute of the Helmholtz Zentrum München at the University Hospital Carl Gustav Carus and The Medical Faculty of TU Dresden (PLID), Dresden, Germany.
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46
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Moshina N, Bjørnson E, Holen Å, Larsen M, Hansestad B, Tøsdal L, Hofvind S. Standardised or individualised X-ray tube angle for mediolateral oblique projection in digital mammography? Radiography (Lond) 2022; 28:772-778. [DOI: 10.1016/j.radi.2022.03.002] [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] [Received: 01/15/2022] [Revised: 03/08/2022] [Accepted: 03/12/2022] [Indexed: 12/24/2022]
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Laigaard PP, Wibaek R, Vaag AA, Hansen MH, Munch IC, Olsen EM, Skovgaard AM, Larsen M. Smoking in pregnancy is associated with increased adiposity and retinal arteriolar wall-to-lumen ratio in adolescence: The Copenhagen Child Cohort Study 2000. Microvasc Res 2022; 142:104364. [PMID: 35346719 DOI: 10.1016/j.mvr.2022.104364] [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: 11/22/2021] [Revised: 03/05/2022] [Accepted: 03/21/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE To investigate the association between prenatal exposures and anthropometric data and cardiovascular risk factors including retinal arteriolar wall-to-lumen ratio in adolescence. METHODS This longitudinal observational study included all 1445 adolescents from the Copenhagen Child Cohort 2000 who attended the 2016-2017 examination. Outcome measures included retinal arteriolar wall-to-lumen ratio, height, body mass index, waist-to-hip ratio, body composition measured by bioimpedance, and blood pressure. Information on prenatal exposures (birth weight, gestational age, maternal smoking during pregnancy) as well as sex, parental age, household income and parental educational levels were obtained from national registries. Associations between exposures and outcome measures were analyzed using general linear models. RESULTS Maternal smoking during pregnancy was associated with a higher retinal arteriolar wall-to-lumen ratio (0.004 or 1.9%, P = 0.009) at age 16/17 years, an association driven exclusively by the female participants (0.008 or 3.7%, P < 0.0001). Maternal smoking during pregnancy was also associated to higher body-mass index (1.43 kg/m2, P < 0.0001), waist-to-hip ratio (0.02, P < 0.0001) and fat mass index (0.93 kg/m2, P < 0.0001). Birth weight, gestational age, and parental age had no detectable impact on retinal arteriolar wall-to-lumen ratios. CONCLUSION Prenatal exposure to tobacco smoking is associated with a higher risk of obesity and, predominantly in girls, to a greater retinal arteriolar wall thickness, which suggests that maternal smoking may induce an unfavorable cardiovascular and metabolic risk profile in the child.
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Affiliation(s)
- Poul P Laigaard
- Department of Ophthalmology, Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark.
| | - Rasmus Wibaek
- Clinical Research, Steno Diabetes Center Copenhagen, Gentofte, Denmark
| | - Allan A Vaag
- Clinical Research, Steno Diabetes Center Copenhagen, Gentofte, Denmark
| | - Mathias H Hansen
- Department of Ophthalmology, Rigshospitalet, Copenhagen, Denmark
| | - Inger C Munch
- Center for Clinical Research and Prevention, the Capital Region of Denmark, Copenhagen, Denmark
| | - Else Marie Olsen
- Center for Clinical Research and Prevention, the Capital Region of Denmark, Copenhagen, Denmark; Outpatient Clinic for Eating Disorders in Adults, Psychiatric Centre Ballerup, the Capital Region of Denmark, Denmark
| | - Anne Mette Skovgaard
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - Michael Larsen
- Department of Ophthalmology, Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
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48
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Nagra N, Klair JS, Jayaraj M, Murali AR, Singh D, Law J, Larsen M, Irani S, Kozarek R, Ross A, Krishnamoorthi R. Biliary Sphincterotomy Alone versus Biliary Stent with or without Biliary Sphincterotomy for the Management of Post-Cholecystectomy Bile Leak: A Systematic Review and Meta-Analysis. Dig Dis 2022; 40:810-815. [PMID: 35130543 DOI: 10.1159/000522328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/31/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND Endoscopic therapy with endoscopic retrograde cholangiopancreatography is considered the first-line treatment in the management of post-cholecystectomy bile leak (PCBL). Currently, there is no consensus on the most effective endoscopic intervention for PCBL. Hence, we performed a systematic review and meta-analysis to compare the effectiveness and safety of the two interventional groups (biliary sphincterotomy [BS] alone vs. biliary stent ± BS) in management of PCBL. METHODS We conducted a comprehensive search of multiple electronic databases and conference proceedings (from inception through January 2021). The primary outcome was to compare the pooled rate of clinical success between the 2 groups. The secondary outcome was to estimate the pooled rate of adverse events. RESULTS The pooled rate of clinical success with BS alone (5 studies, 299 patients) was 88% (95% confidence interval (CI): 84-92%, I2: 0%) and for biliary stent ± BS (5 studies, 864 patients) was 97% (CI: 93-100%, I2: 79%). The rate of clinical success in biliary stent ± BS group was significantly higher than BS alone group (OR: 3.91 95% CI: 2.29-6.69, p < 0.001, I2: 13%). The rate of adverse events was numerically lower in biliary stent ± BS group compared to BS alone (3 studies; OR: 0.65 95% CI: 0.41-1.03, p = 0.07) without statistical significance. Low heterogeneity was noted in the analysis. CONCLUSIONS Biliary stent ± BS is more effective in endoscopic management of PCBL compared to BS alone. This may be related to inter-endoscopist variation in completeness of sphincterotomy and post-sphincterotomy edema, which can influence the preferential trans-papillary flow of bile.
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Affiliation(s)
- Navroop Nagra
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Jagpal Singh Klair
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, USA,
| | - Mahendran Jayaraj
- Division of Gastroenterology and Hepatology, University of Nevada School of Medicine, Las Vegas, Nevada, USA
| | - Arvind R Murali
- Division of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa, Iowa, USA
| | - Dhruv Singh
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Joanna Law
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Michael Larsen
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Shayan Irani
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Richard Kozarek
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Andrew Ross
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Rajesh Krishnamoorthi
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, USA
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49
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Larsen M, Kozarek R. Therapeutic endoscopy for the treatment of post-bariatric surgery complications. World J Gastroenterol 2022; 28:199-215. [PMID: 35110945 PMCID: PMC8776527 DOI: 10.3748/wjg.v28.i2.199] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 07/15/2021] [Accepted: 12/31/2021] [Indexed: 02/06/2023] Open
Abstract
Obesity rates continue to climb worldwide. Obesity often contributes to other comorbidities such as type 2 diabetes, hypertension, heart disease and is a known risk factor for many malignancies. Bariatric surgeries are by far the most invasive treatment options available but are often the most effective and can result in profound, durable weight loss with improvement in or resolution of weight associated comorbidities. Currently performed bariatric surgeries include Roux-en-Y gastric bypass, sleeve gastrectomy, and laparoscopic gastric banding. These surgeries are associated with significant weight loss, but also with significant rates of major complications. The complexity of these patients and surgical anatomies makes management of these complications by a multidisciplinary team critical for optimal outcomes. Minimally invasive treatments for complications are typically preferred because of the high risk associated with repeat operations. Endoscopy plays a large role in both the diagnosis and the management of complications. Endoscopy can provide therapeutic interventions for many bariatric surgical complications including anastomotic strictures, anastomotic leaks, choledocholithiasis, sleeve stenosis, weight regain, and eroded bands. Endoscopists should be familiar with the various surgical anatomies as well as the various therapeutic options available. This review article serves to delineate the current role of endoscopy in the management of complications after bariatric surgery.
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Affiliation(s)
- Michael Larsen
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, WA 98101, United States
| | - Richard Kozarek
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, WA 98101, United States
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50
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Franchi GA, Jensen MB, Foldager L, Larsen M, Herskin MS. Effects of dietary and milking frequency changes and administration of cabergoline on clinical udder characteristics in dairy cows during dry-off. Res Vet Sci 2022; 143:88-98. [PMID: 34999440 DOI: 10.1016/j.rvsc.2021.12.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/07/2021] [Accepted: 12/28/2021] [Indexed: 10/19/2022]
Abstract
We investigated the effects of 2 diet energy densities [normal lactation diet (NORM) vs. energy-reduced diet (REDU), both fed for ad libitum intake] and 2 daily milking frequencies [twice (2×) vs. once (1×)] during 1 week before the dry-off day, as well as effects of an injection of either a dopamine agonist [cabergoline (CAB); Velactis, Ceva Santé Animale, Libourne, France; labelled for use only with abrupt dry-off, e.g. no reduction in diet energy density or milking frequency before the last milking] or saline (SAL) following the last milking, on clinical udder characteristics of Holstein cows. During a week before and after the last milking, the following measures were recorded: palpation-based udder firmness and soreness; image-based hock-hock distance; responsiveness to mechanical udder stimulation and degree of udder fill measured with a dynamometer. Before the last milking, REDU cows displayed lower odds of having a firm udder and lower degree of udder fill, as well as lower responsiveness to mechanical udder stimulation, than NORM cows. After the last milking, REDU cows displayed shorter hock-hock distance compared with NORM cows. The effects of milking frequency on the clinical udder characteristics were unclear. Within 24 h following injection, CAB cows showed lower odds of having a firm udder, shorter hock-hock distance, and lower degree of udder fill than SAL cows, irrespective of treatment group before dry-off. In this study, reducing diet energy density prior to dry-off, and to some extent administering the dopamine agonist cabergoline after the last milking, resulted in fewest clinical udder changes.
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Affiliation(s)
- G A Franchi
- Aarhus University, Department of Animal Science, Blichers Allé 20, 8830 Tjele, Denmark.
| | - M B Jensen
- Aarhus University, Department of Animal Science, Blichers Allé 20, 8830 Tjele, Denmark
| | - L Foldager
- Aarhus University, Department of Animal Science, Blichers Allé 20, 8830 Tjele, Denmark; Aarhus University, Bioinformatics Research Centre, C.F. Møllers Allé 8, 8000 Aarhus, Denmark
| | - M Larsen
- Aarhus University, Department of Animal Science, Blichers Allé 20, 8830 Tjele, Denmark
| | - M S Herskin
- Aarhus University, Department of Animal Science, Blichers Allé 20, 8830 Tjele, Denmark
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