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Oexner RR, Ahn H, Theofilatos K, Shah RA, Schmitt R, Chowienczyk P, Zoccarato A, Shah AM. Serum metabolomics improves risk stratification for incident heart failure. Eur J Heart Fail 2024. [PMID: 38623713 DOI: 10.1002/ejhf.3226] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/01/2024] [Accepted: 03/26/2024] [Indexed: 04/17/2024] Open
Abstract
AIMS Prediction and early detection of heart failure (HF) is crucial to mitigate its impact on quality of life, survival, and healthcare expenditure. Here, we explored the predictive value of serum metabolomics (168 metabolites detected by proton nuclear magnetic resonance [1H-NMR] spectroscopy) for incident HF. METHODS AND RESULTS Leveraging data of 68 311 individuals and >0.8 million person-years of follow-up from the UK Biobank cohort, we (i) fitted per-metabolite Cox proportional hazards models to assess individual metabolite associations, and (ii) trained and validated elastic net models to predict incident HF using the serum metabolome. We benchmarked discriminative performance against a comprehensive, well-validated clinical risk score (Pooled Cohort Equations to Prevent HF [PCP-HF]). During a median follow-up of ≈12.3 years, several metabolites showed independent association with incident HF (90/168 adjusting for age and sex, 48/168 adjusting for PCP-HF). Performance-optimized risk models effectively retained key predictors representing highly correlated clusters (≈80% feature reduction). Adding metabolomics to PCP-HF improved predictive performance (Harrel's C: 0.768 vs. 0.755, ΔC = 0.013, [95% confidence interval [CI] 0.004-0.022], continuous net reclassification improvement [NRI]: 0.287 [95% CI 0.200-0.367], relative integrated discrimination improvement [IDI]: 17.47% [95% CI 9.463-27.825]). Models including age, sex and metabolomics performed almost as well as PCP-HF (Harrel's C: 0.745 vs. 0.755, ΔC = 0.010 [95% CI -0.004 to 0.027], continuous NRI: 0.097 [95% CI -0.025 to 0.217], relative IDI: 13.445% [95% CI -10.608 to 41.454]). Risk and survival stratification was improved by integrating metabolomics. CONCLUSION Serum metabolomics improves incident HF risk prediction over PCP-HF. Scores based on age, sex and metabolomics exhibit similar predictive power to clinically-based models, potentially offering a cost-effective, standardizable, and scalable single-domain alternative.
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Affiliation(s)
- Rafael R Oexner
- King's College London British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, London, UK
| | - Hyunchan Ahn
- King's College London British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, London, UK
| | - Konstantinos Theofilatos
- King's College London British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, London, UK
| | - Ravi A Shah
- University College Hospital, University College London Hospitals NHS Foundation Trust, London, UK
| | - Robin Schmitt
- King's College London British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, London, UK
| | - Philip Chowienczyk
- King's College London British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, London, UK
| | - Anna Zoccarato
- King's College London British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, London, UK
| | - Ajay M Shah
- King's College London British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, London, UK
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Shah RA, Chahal CAA, Ranjha S, Sharaf Dabbagh G, Asatryan B, Limongelli I, Khanji M, Ricci F, De Paoli F, Zucca S, Tristani-Firouzi M, St Louis EK, So EL, Somers VK. Cardiovascular Disease Burden, Mortality, and Sudden Death Risk in Epilepsy: A UK Biobank Study. Can J Cardiol 2024; 40:688-695. [PMID: 38013064 DOI: 10.1016/j.cjca.2023.11.021] [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: 08/28/2023] [Revised: 10/19/2023] [Accepted: 11/07/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND Sudden death is the leading cause of mortality in medically refractory epilepsy. Middle-aged persons with epilepsy (PWE) are under investigated regarding their mortality risk and burden of cardiovascular disease (CVD). METHODS Using UK Biobank, we identified 7786 (1.6%) participants with diagnoses of epilepsy and 6,171,803 person-years of follow-up (mean 12.30 years, standard deviation 1.74); 566 patients with previous histories of stroke were excluded. The 7220 PWE comprised the study cohort with the remaining 494,676 without epilepsy as the comparator group. Prevalence of CVD was determined using validated diagnostic codes. Cox proportional hazards regression was used to assess all-cause mortality and sudden death risk. RESULTS Hypertension, coronary artery disease, heart failure, valvular heart disease, and congenital heart disease were more prevalent in PWE. Arrhythmias including atrial fibrillation/flutter (12.2% vs 6.9%; P < 0.01), bradyarrhythmias (7.7% vs 3.5%; P < 0.01), conduction defects (6.1% vs 2.6%; P < 0.01), and ventricular arrhythmias (2.3% vs 1.0%; P < 0.01), as well as cardiac implantable electric devices (4.6% vs 2.0%; P < 0.01) were more prevalent in PWE. PWE had higher adjusted all-cause mortality (hazard ratio [HR], 3.9; 95% confidence interval [CI], 3.01-3.39), and sudden death-specific mortality (HR, 6.65; 95% CI, 4.53-9.77); and were almost 2 years younger at death (68.1 vs 69.8; P < 0.001). CONCLUSIONS Middle-aged PWE have increased all-cause and sudden death-specific mortality and higher burden of CVD including arrhythmias and heart failure. Further work is required to elucidate mechanisms underlying all-cause mortality and sudden death risk in PWE of middle age, to identify prognostic biomarkers and develop preventative therapies in PWE.
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Affiliation(s)
- Ravi A Shah
- London North West University Healthcare NHS Trust, London, United Kingdom
| | - C Anwar A Chahal
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA; Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA; WellSpan Center for Inherited Cardiovascular Diseases, WellSpan Health, York, Pennsylvania, USA.
| | | | - Ghaith Sharaf Dabbagh
- WellSpan Center for Inherited Cardiovascular Diseases, WellSpan Health, York, Pennsylvania, USA; Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Babken Asatryan
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | | | - Mohammed Khanji
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, United Kingdom; NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Fabrizio Ricci
- Department of Neuroscience, Imaging and Clinical Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | | | | | | | - Erik K St Louis
- Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA; Mayo Center for Sleep Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Elson L So
- Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Virend K Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA; Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
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Asatryan B, Shah RA, Sharaf Dabbagh G, Landstrom AP, Darbar D, Khanji MY, Lopes LR, van Duijvenboden S, Muser D, Lee AM, Haggerty CM, Arora P, Semsarian C, Reichlin T, Somers VK, Owens AT, Petersen SE, Deo R, Munroe PB, Aung N, Chahal CAA. Predicted Deleterious Variants in Cardiomyopathy Genes Prognosticate Mortality and Composite Outcomes in UK Biobank. JACC Heart Fail 2023:S2213-1779(23)00492-4. [PMID: 37715771 DOI: 10.1016/j.jchf.2023.07.023] [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] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 07/14/2023] [Accepted: 07/19/2023] [Indexed: 09/18/2023]
Abstract
BACKGROUND Inherited cardiomyopathies present with broad variation of phenotype. Data are limited regarding genetic screening strategies and outcomes associated with predicted deleterious variants in cardiomyopathy-associated genes in the general population. OBJECTIVES The authors aimed to determine the risk of mortality and composite cardiomyopathy-related outcomes associated with predicted deleterious variants in cardiomyopathy-associated genes in the UK Biobank. METHODS Using whole exome sequencing data, variants in dilated, hypertrophic, and arrhythmogenic right ventricular cardiomyopathy-associated genes with at least moderate evidence of disease causality according to ClinGen Expert Panel curations were annotated using REVEL (≥0.65) and ANNOVAR (predicted loss-of-function) considering gene-disease mechanisms. Genotype-positive and genotype-negative groups were compared using time-to-event analyses for the primary (all-cause mortality) and secondary outcomes (diagnosis of cardiomyopathy; composite outcome of diagnosis of cardiomyopathy, heart failure, arrhythmia, stroke, and death). RESULTS Among 200,619 participants (age at recruitment 56.46 ± 8.1 years), 5,292 (2.64%) were found to host ≥1 predicted deleterious variants in cardiomyopathy-associated genes (CMP-G+). After adjusting for age and sex, CMP-G+ individuals had higher risk for all-cause mortality (HR: 1.13 [95% CI: 1.01-1.25]; P = 0.027), increased risk for being diagnosed with cardiomyopathy later in life (HR: 5.75 [95% CI: 4.58-7.23]; P < 0.0001), and elevated risk for composite outcome (HR: 1.29 [95% CI: 1.20-1.39]; P < 0.0001) than CMP-G- individuals. The higher risk for being diagnosed with cardiomyopathy and composite outcomes in the genotype-positive subjects remained consistent across all cardiomyopathy subgroups. CONCLUSIONS Adults with predicted deleterious variants in cardiomyopathy-associated genes exhibited a slightly higher risk of mortality and a significantly increased risk of developing cardiomyopathy, and cardiomyopathy-related composite outcomes, in comparison with genotype-negative controls.
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Affiliation(s)
- Babken Asatryan
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Ravi A Shah
- Northwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
| | - Ghaith Sharaf Dabbagh
- Center for Inherited Cardiovascular Diseases, WellSpan Health, Lancaster, Pennsylvania; University of Michigan, Division of Cardiovascular Medicine, Ann Arbor, Michigan
| | - Andrew P Landstrom
- Departments of Pediatrics, Division of Cardiology, and Cell Biology, Duke University School of Medicine, Durham, North Carolina
| | | | - Mohammed Y Khanji
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, West Smithfield, UK; NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, London, UK; Newham University Hospital, Barts Health NHS Trust, London, UK
| | - Luis R Lopes
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, West Smithfield, UK; Centre for Heart Muscle Disease, Institute of Cardiovascular Science, University College London, London, UK
| | - Stefan van Duijvenboden
- NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Daniele Muser
- Cardiac Electrophysiology, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania; Dipartimento Cardiotoracico, U.O.C. di Cardiologia, Presidio Ospedaliero Universitario "Santa Maria Della Misericordia," Udine, Italy
| | - Aaron Mark Lee
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, West Smithfield, UK; NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Christopher M Haggerty
- Department of Translational Data Science and Informatics, Geisinger, Danville, Pennsylvania
| | - Pankaj Arora
- Division of Cardiovascular Disease, University of Alabama at Birmingham, Alabama
| | - Christopher Semsarian
- Agnes Ginges Centre for Molecular Cardiology at Centenary Institute, The University of Sydney, Sydney, New South Wales, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia; Department of Cardiology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Tobias Reichlin
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Virend K Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Anjali T Owens
- Center for Inherited Cardiovascular Disease, Cardiovascular Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Steffen E Petersen
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, West Smithfield, UK; NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Rajat Deo
- Center for Inherited Cardiovascular Disease, Cardiovascular Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Patricia B Munroe
- NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Nay Aung
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, West Smithfield, UK; NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - C Anwar A Chahal
- Center for Inherited Cardiovascular Diseases, WellSpan Health, Lancaster, Pennsylvania; Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, West Smithfield, UK; Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota.
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Rasool A, Farooq S, Kumar S, Kashoo ZA, Dar PA, Bhat MA, Qureshi S, Hussain I, Shah RA, Taku A, Khan I, Hassan MN. Evidence of novel Treponema phylotypes implicated in contagious ovine digital dermatitis and association of treponemes with major lameness causing foot pathogens. Microb Pathog 2023; 182:106214. [PMID: 37423496 DOI: 10.1016/j.micpath.2023.106214] [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: 06/04/2023] [Revised: 06/24/2023] [Accepted: 06/25/2023] [Indexed: 07/11/2023]
Abstract
In this study 269 swabs collected from 254 ovine foot lesions and 15 apparently healthy ovine feet were screened by PCR for the presence of major lameness causing foot pathogens viz. Treponema species, D. nodosus, F. necrophorum and T. pyogenes with the presumption that ovine foot lesion positive for Treponema species alone or in association with other three pathogens were categorized as contagious ovine digital dermatitis (CODD). While samples positive for D. nodosus alone or its combination with F. necrophorum and T. pyogenes were considered as footrot (FR) and samples in which F. necrophorum or T. pyogenes was found either alone or in combination were considered as interdigital dermatitis (ID). The overall occurrence of Treponema sp. in ovine foot lesions was 48.0%, and ranged from 33 to 58%. In Treponema positive samples D. nodosus, F. necrophorum and T. pyogenes were present in 34 (27.4%), 66 (54.4%) and 84 (68.5%) in contrast to Treponema negative samples in which these were present in 15 (11.1%), 20 (14.12%) and 17 (12.6%) samples, respectively. The data signifies that Treponema sp. are significantly associated with these foot pathogens and their different combinations with Treponema sp. influence the severity of CODD lesion. The identification of Treponema phylotypes was done by sequencing the 16S rRNA gene fragment of ten representative samples. Out of ten sequences, four (Trep-2, Trep-4, Trep-7 and Trep-10) were identical to Treponema sp. phylotype 1 (PT1) that belongs to phylogroup T. refringens-like, one sequence (Trep-1) was genetically close (90% sequence homology) to Treponema brennaborense while five sequences (Trep-3, Trep-5, Trep-6, Trep-8 and Trep-9) matched with uncultured bacterium clones of treponemes forming separate monophyletic group in phylogenetic tree and could represent new digital dermatitis phylogroup presently containing five ovine specific phylotypes. This is the first report on the presence of Treponema phylotypes other than three digital dermatitis (DD) Treponema phylogroups viz. T. phagedenis-like, T. medium/T. vincentii-like, and T. pedis-like that are frequently detected in CODD lesions. Metagenomic analysis of two representative samples revealed the abundance of genus Treponema in CODD lesion while this genus was absent in swab collected from clinically healthy foot suggesting that it might play primary role in producing CODD. These findings may further aid in understanding the etiopathogenesis of CODD and could help to develop appropriate treatment and mitigation strategies to combat the disease.
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Affiliation(s)
- A Rasool
- Anaerobic Bacteriology Laboratory, Division of Veterinary Microbiology and Immunology, SKUAST-K, Shuhama (Alusteng), Srinagar, Jammu and Kashmir 190006, India
| | - S Farooq
- Anaerobic Bacteriology Laboratory, Division of Veterinary Microbiology and Immunology, SKUAST-K, Shuhama (Alusteng), Srinagar, Jammu and Kashmir 190006, India.
| | - S Kumar
- Anaerobic Bacteriology Laboratory, Division of Veterinary Microbiology and Immunology, SKUAST-K, Shuhama (Alusteng), Srinagar, Jammu and Kashmir 190006, India
| | - Z A Kashoo
- Anaerobic Bacteriology Laboratory, Division of Veterinary Microbiology and Immunology, SKUAST-K, Shuhama (Alusteng), Srinagar, Jammu and Kashmir 190006, India
| | - P A Dar
- Anaerobic Bacteriology Laboratory, Division of Veterinary Microbiology and Immunology, SKUAST-K, Shuhama (Alusteng), Srinagar, Jammu and Kashmir 190006, India
| | - M A Bhat
- Anaerobic Bacteriology Laboratory, Division of Veterinary Microbiology and Immunology, SKUAST-K, Shuhama (Alusteng), Srinagar, Jammu and Kashmir 190006, India
| | - S Qureshi
- Anaerobic Bacteriology Laboratory, Division of Veterinary Microbiology and Immunology, SKUAST-K, Shuhama (Alusteng), Srinagar, Jammu and Kashmir 190006, India
| | - I Hussain
- Anaerobic Bacteriology Laboratory, Division of Veterinary Microbiology and Immunology, SKUAST-K, Shuhama (Alusteng), Srinagar, Jammu and Kashmir 190006, India
| | - R A Shah
- Division of Animal Biotechnology, SKUAST-K, Shuhama (Alusteng), Srinagar, India
| | - A Taku
- Division of Veterinary Microbiology, Faculty of Veterinary Sciences and Animal Husbandry,R.S. Pura, SKUAST-Jammu, 181102, India
| | - I Khan
- Division of Agri. Statistics, SKUAST-K, Shalimar, Srinagar, 190025, India
| | - M N Hassan
- Animal Science, KVK-Budgam, SKUAST-K, India
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Shah RA, Asatryan B, Sharaf Dabbagh G, Aung N, Khanji MY, Lopes LR, van Duijvenboden S, Holmes A, Muser D, Landstrom AP, Lee AM, Arora P, Semsarian C, Somers VK, Owens AT, Munroe PB, Petersen SE, Chahal CAA. Frequency, Penetrance, and Variable Expressivity of Dilated Cardiomyopathy-Associated Putative Pathogenic Gene Variants in UK Biobank Participants. Circulation 2022; 146:110-124. [PMID: 35708014 PMCID: PMC9375305 DOI: 10.1161/circulationaha.121.058143] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND There is a paucity of data regarding the phenotype of dilated cardiomyopathy (DCM) gene variants in the general population. We aimed to determine the frequency and penetrance of DCM-associated putative pathogenic gene variants in a general adult population, with a focus on the expression of clinical and subclinical phenotype, including structural, functional, and arrhythmic disease features. METHODS UK Biobank participants who had undergone whole exome sequencing, ECG, and cardiovascular magnetic resonance imaging were selected for study. Three variant-calling strategies (1 primary and 2 secondary) were used to identify participants with putative pathogenic variants in 44 DCM genes. The observed phenotype was graded DCM (clinical or cardiovascular magnetic resonance diagnosis); early DCM features, including arrhythmia or conduction disease, isolated ventricular dilation, and hypokinetic nondilated cardiomyopathy; or phenotype-negative. RESULTS Among 18 665 individuals included in the study, 1463 (7.8%) possessed ≥1 putative pathogenic variant in 44 DCM genes by the main variant calling strategy. A clinical diagnosis of DCM was present in 0.34% and early DCM features in 5.7% of individuals with putative pathogenic variants. ECG and cardiovascular magnetic resonance analysis revealed evidence of subclinical DCM in an additional 1.6% and early DCM features in an additional 15.9% of individuals with putative pathogenic variants. Arrhythmias or conduction disease (15.2%) were the most common early DCM features, followed by hypokinetic nondilated cardiomyopathy (4%). The combined clinical/subclinical penetrance was ≤30% with all 3 variant filtering strategies. Clinical DCM was slightly more prevalent among participants with putative pathogenic variants in definitive/strong evidence genes as compared with those with variants in moderate/limited evidence genes. CONCLUSIONS In the UK Biobank, ≈1 of 6 of adults with putative pathogenic variants in DCM genes exhibited early DCM features potentially associated with DCM genotype, most commonly manifesting with arrhythmias in the absence of substantial ventricular dilation or dysfunction.
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Affiliation(s)
- Ravi A Shah
- Imperial College Healthcare NHS Trust, London, United Kingdom (R.A.S.)
| | - Babken Asatryan
- Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Switzerland (B.A.)
| | - Ghaith Sharaf Dabbagh
- Center for Inherited Cardiovascular Diseases, WellSpan Health, Lancaster, PA (G.S.D., C.A.A.C.).,University of Michigan, Division of Cardiovascular Medicine, Ann Arbor (G.S.D.)
| | - Nay Aung
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, United Kingdom (N.A., M.Y.K., L.R.L., A.M.L., S.E.P., C.A.A.C.).,NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, United Kingdom (N.A., M.Y.K., S.v.D., A.M.L., P.B.M., S.E.P.)
| | - Mohammed Y Khanji
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, London, United Kingdom (N.A., M.Y.K., L.R.L., A.M.L., S.E.P., C.A.A.C.).,NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, United Kingdom (N.A., M.Y.K., S.v.D., A.M.L., P.B.M., S.E.P.)
| | - Luis R Lopes
- Centre for Heart Muscle Disease, Institute of Cardiovascular Science, University College London, United Kingdom (L.R.L.)
| | - Stefan van Duijvenboden
- NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, United Kingdom (N.A., M.Y.K., S.v.D., A.M.L., P.B.M., S.E.P.)
| | | | - Daniele Muser
- Cardiac Electrophysiology, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia (D.M., C.A.A.C.)
| | - Andrew P Landstrom
- Departments of Pediatrics, Division of Cardiology, and Cell Biology, Duke University School of Medicine, Durham, NC (A.P.L.)
| | - Aaron Mark Lee
- NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, United Kingdom (N.A., M.Y.K., S.v.D., A.M.L., P.B.M., S.E.P.)
| | - Pankaj Arora
- Division of Cardiovascular Disease, University of Alabama at Birmingham (P.A.)
| | - Christopher Semsarian
- Agnes Ginges Centre for Molecular Cardiology at Centenary Institute (C.S.), The University of Sydney, New South Wales, Australia.,Sydney Medical School Faculty of Medicine and Health (C.S.), The University of Sydney, New South Wales, Australia.,Department of Cardiology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia (C.S.)
| | - Virend K Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN (V.K.S., C.A.A.C.)
| | - Anjali T Owens
- Center for Inherited Cardiovascular Disease, Cardiovascular Division, University of Pennsylvania Perelman School of Medicine, Philadelphia (A.T.O.)
| | - Patricia B Munroe
- NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, United Kingdom (N.A., M.Y.K., S.v.D., A.M.L., P.B.M., S.E.P.)
| | - Steffen E Petersen
- NIHR Barts Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, United Kingdom (N.A., M.Y.K., S.v.D., A.M.L., P.B.M., S.E.P.)
| | - C Anwar A Chahal
- Center for Inherited Cardiovascular Diseases, WellSpan Health, Lancaster, PA (G.S.D., C.A.A.C.).,Cardiac Electrophysiology, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia (D.M., C.A.A.C.).,Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN (V.K.S., C.A.A.C.)
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Kapur M, Shah RA, Ferro A, Basyuni S, Brassett C, Santhanam V. Sexual dimorphism and geographical variance: their impact on the reliability of the antilingula as a landmark in human mandibular surgery. Br J Oral Maxillofac Surg 2021; 59:898-904. [PMID: 34420783 DOI: 10.1016/j.bjoms.2020.08.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 08/11/2020] [Indexed: 10/23/2022]
Abstract
The intraoral vertical ramus osteotomy (IVRO) is an orthognathic procedure that is used to correct dentofacial abnormalities, and is performed by approaching the lateral aspect of the mandibular ramus. This approach, however, precludes visualisation of the inferior alveolar nerve (IAN) on the medial side, thereby placing it at risk of iatrogenic damage. The antilingula, a bony prominence on the lateral mandibular ramus, has been proposed as a landmark for prediction of the IAN's location during IVRO. The current study aimed to evaluate the variation in incidence and position of the antilingula, and therefore to determine its suitability as a surgical landmark during IVRO. The study included 480 dry hemimandibles from eight geographical populations from the Duckworth Collection in Cambridge. Skulls were sexed by visual analysis of dimorphic traits. Positional relations were determined through the digitisation of nine anatomical landmarks. The antilingula was identified in all specimens. No significant difference was identified in the positional relation between the antilingula and mandibular foramen between sexes, but multiple differences were identified in this relation between geographical populations. Our data showed that, irrespective of geographical variation, an osteotomy performed 8mm posterior to the antilingula would avoid the mandibular foramen in 98.8% of cases.
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Affiliation(s)
- M Kapur
- School of Clinical Medicine, University of Cambridge, CB2 0SP, United Kingdom.
| | - R A Shah
- School of Clinical Medicine, University of Cambridge, CB2 0SP, United Kingdom.
| | - A Ferro
- School of Clinical Medicine, University of Cambridge, CB2 0SP, United Kingdom
| | - S Basyuni
- School of Clinical Medicine, University of Cambridge, CB2 0SP, United Kingdom
| | - C Brassett
- Human Anatomy Teaching Group, Department of Physiology, Development & Neuroscience, Downing Site, University of Cambridge, CB2 3DY, United Kingdom
| | - V Santhanam
- Department of Oral and Maxillofacial Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom
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Khatun A, Fazili MR, Malik AA, Shah RA, Khan HM, Choudhury AR, Naikoo M, Lone FA, Malik A. In vitro Assessment of Tris Egg Yolk and Soybean Lecithin Based Extenders for Cryopreservation of Crossbred Ram Semen. Cryo Letters 2021; 42:73-80. [PMID: 33970983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND The replacement of egg yolk with alternative plant-derived soybean lecithin is gaining interest in both animal and human sperm cryopreservation owing to biosecurity issues with egg yolk based extenders. OBJECTIVE To evaluate the comparative effect of egg yolk and soyabean lecithin based extenders on the quality of cryopreserved crossbred ram semen. METHODS Pooled ejaculates (total ejaculates = 36) were divided into two aliquots and extended with Tris egg yolk extender (Tris extender) and soybean lecithin based commercial extender (Ovixcell) RESULTS: Among the two extenders, Ovixcell showed better sperm quality both at the pre-freeze (Sperm motility) and post-thaw stages. Lower malondialdehyde (MDA) level (nmol/mL) was observed in Ovixcell as compared to Tris extender. Both sperm quality and MDA level decreased significantly (P < 0.05) from pre-freeze to post-thaw in both the extenders. CONCLUSION The findings of the present study indicate that Ovixcell is a comparable alternative to Tris extender for the cryopreservation of crossbred ram semen.
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Affiliation(s)
- A Khatun
- Division of Animal Reproduction, Gynaecology and Obstetrics, Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India.
| | - M R Fazili
- Division of Veterinary Clinical Complex, Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India
| | - A A Malik
- Division of Animal Reproduction, Gynaecology and Obstetrics,Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India
| | - R A Shah
- Division of Animal Biotechnology, Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India
| | - H M Khan
- Mountain Research Centre for Sheep and Goats (MRCSG), Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India
| | - A R Choudhury
- Division of Veterinary Anatomy and Histology, Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India
| | - M Naikoo
- Division of Animal Reproduction, Gynaecology and Obstetrics, Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India
| | - F A Lone
- Division of Animal Reproduction, Gynaecology and Obstetrics, Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India
| | - A Malik
- Division of Animal Biotechnology, Faculty of Veterinary Sciences and Animal Husbandry, Shere-e-Kashmir, University of Agricultural Sciences and Technology of Kashmir, Shuhama, Alusteng, Jammu and Kashmir, India
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Khan S, Tali M, Khan A, Bhat S, Ashraf A, Bhat MH, Khan F, Shah RA. Comparison of efficiency of in vitro cloned sheep embryo production by conventional somatic cell nuclear transfer and handmade cloning technique. Reprod Domest Anim 2018; 53:512-518. [DOI: 10.1111/rda.13138] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 12/13/2017] [Indexed: 11/28/2022]
Affiliation(s)
- S Khan
- Centre of Animal Biotechnology; Faculty of Veterinary Sciences and Animal Husbandry; Sher-e- Kashmir University of Agricultural Sciences and Technology; Srinagar Jammu and Kashmir India
| | - M Tali
- Centre of Animal Biotechnology; Faculty of Veterinary Sciences and Animal Husbandry; Sher-e- Kashmir University of Agricultural Sciences and Technology; Srinagar Jammu and Kashmir India
| | - A Khan
- Division of Animal Nutrition; Indian Veterinary Research Institute; Izzatnagar Bareilly Uttar Pradesh India
| | - S Bhat
- Centre of Animal Biotechnology; Faculty of Veterinary Sciences and Animal Husbandry; Sher-e- Kashmir University of Agricultural Sciences and Technology; Srinagar Jammu and Kashmir India
| | - A Ashraf
- Division of Veterinary Parasitology; Faculty of Veterinary Sciences and Animal Husbandry; Sher-e- Kashmir University of Agricultural Sciences and Technology; Srinagar Jammu and Kashmir India
| | - MH Bhat
- Centre of Animal Biotechnology; Faculty of Veterinary Sciences and Animal Husbandry; Sher-e- Kashmir University of Agricultural Sciences and Technology; Srinagar Jammu and Kashmir India
| | - F Khan
- Centre of Animal Biotechnology; Faculty of Veterinary Sciences and Animal Husbandry; Sher-e- Kashmir University of Agricultural Sciences and Technology; Srinagar Jammu and Kashmir India
| | - RA Shah
- Centre of Animal Biotechnology; Faculty of Veterinary Sciences and Animal Husbandry; Sher-e- Kashmir University of Agricultural Sciences and Technology; Srinagar Jammu and Kashmir India
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Bhat MH, Sharma V, Khan FA, Naykoo NA, Yaqoob SH, Khan HM, Fazili MR, Ganai NA, Shah RA. Comparison of slow freezing and vitrification on ovine immature oocytes. Cryo Letters 2014; 35:77-82. [PMID: 24872161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Immature oocytes are more sensitive to cold injury than mature oocytes. OBJECTIVE The study was to evaluate the post thaw normal oocytes, cleavage and blastocyst rates of ovine cumulus oocyte complexes (COC's) using different cryoprotectants by slow freezing and Open pulled straw (OPS) vitrification. METHODS In five replicates, abattoir derived COC's were collected and distributed into three groups. In Experiment 1, COC's were cryopreserved by a slow freezing protocol using 10% concentration of ethylene glycol (EG), 10% dimethyl sulphoxide (DMSO) or 5% EG and 5% DMSO mixture. In Experiment 2 and 3 embryos were cryopreserved by OPS vitrification using either 33% or 40% (EG, DMSO or an equal mixture of EG and DMSO mixture. Normal oocytes post thaw were in vitro matured and parthenogenetically activated. RESULTS Although, there was no difference in the number of post thaw normal oocytes between the groups, cleavage and blastocyst rates were higher in 10% slow freezing group than any of the vitrified groups. CONCLUSION The study demonstrates better cryopreservation of ovine COC's by controlled slow freezing than OPS vitrification.
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Khan FA, Bhat MH, Yaqoob SH, Waheed SM, Naykoo NA, Athar H, Khan HM, Fazili MR, Ganai NA, Singla SK, Shah RA. In vitro development of goat-sheep and goat-goat zona-free cloned embryos in different culture media. Theriogenology 2013; 81:419-23. [PMID: 24210966 DOI: 10.1016/j.theriogenology.2013.10.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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: 12/11/2012] [Revised: 10/12/2013] [Accepted: 10/12/2013] [Indexed: 11/18/2022]
Abstract
The gradual decline in the genetic diversity of farm animals has threatened their survival and risk of their extinction has increased many fold in the recent past. Endangered species could be rescued using interspecies embryo production. The objective of this study was to investigate the effect of three different culture media on the development of Handmade cloned intraspecies (goat-goat) and interspecies (goat-sheep) embryo reconstructs. Research vitro cleave media (RVCL) yielded higher cleavage and morula-blastocyst development in intraspecies and interspecies nuclear transfer groups compared with G1.G2 and modified synthetic oviductal fluid (mSOFaaci). Cleavage frequency of intraspecies cloned embryos in RVCL, mSOFaaci, and G1.G2 did not differ significantly (87.12%, 82.45%, and 92.52%, respectively). However, the morula/blastocyst frequency in RVCL was greater in mSOFaaci and G1.G2 (51.18% vs. 38.28% vs. 36.50%, respectively). Cleavage and morula/blastocyst frequency in interspecies cloned embryos was greater in RVCL than in mSOFaaci and G1.G2 (76.14% and 42.3% vs. 65.9% and 38.3% vs. 58.56% and 33.1%, respectively). Goat oocytes were parthenogenetically activated and cultured in RVCL, mSOFaaci, and G1.G2 and kept as control. Cleavage and morula/blastocyst frequency in this group was greater in RVCL than in mSOFaaci and G1.G2 (89.66% and 65.26% vs. 85.44% and 48.05% vs. 86.58% and 42.06%, respectively). Conclusively, the results suggest that not only can the interspecies embryos of goat be produced using sheep oocytes as donor cytoplast but also the percentages can be improved by using RVCL media for culturing of the embryos.
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Affiliation(s)
- F A Khan
- Centre of Animal Biotechnology, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - M H Bhat
- Centre of Animal Biotechnology, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - S H Yaqoob
- Centre of Animal Biotechnology, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - S M Waheed
- Centre of Animal Biotechnology, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - N A Naykoo
- Centre of Animal Biotechnology, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - H Athar
- Division of Veterinary Surgery and Radiology, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - H M Khan
- Mountain Research Centre for Sheep and Goat, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - M R Fazili
- Teaching Veterinary Clinical Services Complex, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - N A Ganai
- Centre of Animal Biotechnology, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India
| | - S K Singla
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, India
| | - R A Shah
- Centre of Animal Biotechnology, Faculty of Veterinary Science, Sher-e- Kashmir University of Agricultural Sciences and Technology, Srinagar, Jammu and Kashmir, India.
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Singh MK, Singh KP, Kumar D, Shah RA, Anand T, Chauhan MS, Manik RS, Singla SK, Palta P. Buffalo (Bubalus bubalis) ES cell-like cells are capable of in vitro skeletal myogenic differentiation. Reprod Domest Anim 2012; 48:284-91. [PMID: 22788718 DOI: 10.1111/j.1439-0531.2012.02146.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
When buffalo embryonic stem (ES) cell-like cells that expressed surface markers SSEA-4, TRA-1-60, TRA-1-81, CD9 and CD90 and intracellular markers OCT4, SOX2 and FOXD3, as shown by immunofluorescence, and that expressed REX-1 and NUCLEOSTEMIN as confirmed by RT-PCR, were subjected to suspension culture in hanging drops in absence of LIF and buffalo foetal fibroblast feeder layer support, they differentiated to form three-dimensional embryoid bodies (EBs). Of 231 EBs examined on Day 3 of suspension culture, 141 (61.3 ± 3.09%) were of compact type, whereas 90 (38.4 ± 3.12%) were of cystic type. The cells obtained from EBs were found to express NF-68 and NESTIN (ectodermal lineage), BMP-4 and α-skeletal actin (mesodermal lineage), and α-fetoprotein, GATA-4 and HNF-4 (endodermal lineage). When these EBs were cultured on gelatin-coated dishes, they spontaneously differentiated to several cell types such as epithelial- and neuron-like cells. When EBs were cultured in the presence of 1 or 2% DMSO or 10(-8) M or 10(-7) M retinoic acid for 25 days, ES cells could be directed to form muscle cell-like cells, the identity of which was confirmed by expression of α-actinin by immunofluorescence and of MYF-5, MYOD and MYOGENIN genes by RT-PCR. MYOD was first detected on Day 10 in both treatment groups and on Day 15 in controls, whereas MYOGENIN was first detected on Day 10, Day 15 and Day 25 in the presence of retinoic acid, in the presence of DMSO and in controls, respectively. The present study demonstrates the ability of buffalo ES cell-like cells to undergo directed differentiation to cells of skeletal myogenic lineage.
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Affiliation(s)
- M K Singh
- Embryo Biotechnology Laboratory, Animal Biotechnology Centre, National Dairy Research Institute, Karnal, India
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Kumar D, Anand T, Singh KP, Singh MK, Shah RA, Chauhan MS, Palta P, Singla SK, Manik RS. Derivation of buffalo embryonic stem-like cells from in vitro-produced blastocysts on homologous and heterologous feeder cells. J Assist Reprod Genet 2011; 28:679-88. [PMID: 21573679 DOI: 10.1007/s10815-011-9572-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 04/20/2011] [Indexed: 11/24/2022] Open
Abstract
PURPOSE The aim of the present study is to compare the ability of homologous and heterologous embryonic fibroblast feeder layers to support isolation and proliferation of buffalo ES-like cells generated from hatched and expanded blastocysts produced by in vitro fertilization and characterization of derived cells through expression of pluripotent markers. METHODS Embryonic stem cells were derived from hatched and expanded blastocysts through intact blastocyst culture and enzymatic method respectively and compared for proliferation rate on homologous (buffalo) and heterologous feeder layers (goat and sheep). RESULTS A total of 69 hatched and 83 expanded blastocysts were used for isolation of inner cell masses which were seeded on buffalo, goat and sheep embryonic feeder layers. Following seeding, attachment rate, primary colony formation rate and survival to maximum number of passages were observed to be higher on homologous feeder layers. CONCLUSIONS Upon comparison of different feeder layer cells for derivation and maintenance of buffalo ES-like cells from hatched and expanded blastocysts, buffalo embryonic fibroblast cells were able to provide a better environment for maintaining pluripotency in culture conditions.
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Affiliation(s)
- Dharmendra Kumar
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, 132001, India.
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Anand T, Kumar D, Singh MK, Shah RA, Chauhan MS, Manik RS, Singla SK, Palta P. Buffalo (Bubalus bubalis) embryonic stem cell-like cells and preimplantation embryos exhibit comparable expression of pluripotency-related antigens. Reprod Domest Anim 2011; 46:50-8. [PMID: 20042025 DOI: 10.1111/j.1439-0531.2009.01564.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this study, inner cell mass (ICM) cells were isolated from in vitro produced buffalo blastocysts and were cultured on mitomycin-C treated buffalo foetal fibroblast feeder layer for producing embryonic stem (ES) cells. Among different sources (hatched vs expanded blastocysts) or methods (enzymatic vs mechanical), mechanical isolation of ICM from hatched blastocysts resulted in the highest primary colony formation rate and the maximum passage number up to which ES cells survived. Putative ES cells expressed alkaline phosphatase and exhibited a normal karyotype up to passage 7. Putative ES cells and embryos at 2- to 4-cell, 8- to 16-cell, morula and blastocyst stages strongly expressed stage-specific embryonic antigen (SSEA)-4 but lacked expressions of SSEA-1 and SSEA-3. Putative ES cells also expressed tumour rejection antigen (TRA)-1-60, TRA-1-81 and Oct4. Whereas in all early embryonic stages, TRA-1-60 was observed only in the periplasmic space, and TRA-1-81 expression was observed as small spots at a few places inside the embryos, both these markers were expressed by ICM. Oct4 expression, which was observed at all the embryonic stages and also in the trophectoderm, was the strongest in the ICM. Buffalo putative ES cells possess a unique pluripotency-related surface antigen phenotype, which resembles that of the ICM.
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Affiliation(s)
- T Anand
- Animal Biotechnology Center, National Dairy Research Institute, Karnal-132001, India
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George A, Shah RA, Sharma R, Palta P, Singla SK, Manik RS, Chauhan MS. Activation of Zona-Free Buffalo (Bubalus bubalis) Oocytes by Chemical or Electrical stimulation, and Subsequent Parthenogenetic Embryo Development. Reprod Domest Anim 2010; 46:444-7. [DOI: 10.1111/j.1439-0531.2010.01687.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Shah RA, Joseph MC, Butchaiah G, Malik M, Singh RK, Bakshi CS. Detection of rinderpest virus using N-protein monoclonal antibodies. Trop Anim Health Prod 2004; 36:11-25. [PMID: 14979554 DOI: 10.1023/b:trop.0000009527.39602.11] [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] [Indexed: 11/12/2022]
Abstract
A panel of monoclonal antibodies (mAbs) was generated against the RBOK strain of rinderpest virus (RPV). All of them bound to the N protein of RPV. The antigen capture ELISA using the mAbs could detect the virus in crude viral preparations. The mAb 12BF8.1.1 showed higher reactivity with cell-associated (CA) virus, whereas the mAbs 12AD10.1.1, 12BD7.1.1 and 12DG7.1.1 showed higher reactivity with extracellular virus (hereafter referred to as cell-free (CF) virus). The mAbs 12BF8.1.1 and 12AD10.1.1 could detect the virus in infected Vero cell culture supernatants (CCS) as early as 24 h post-cytopathic effect (CPE) initiation. Detergent treatment (Triton X-100) of RPV preparations enhanced the binding of the mAbs to the virus. All the seven mAbs showed specific fluorescence in virus-infected cell cultures. The immunofluorescence (IFA) using mAbs was found to be more sensitive and reliable than the immunoperoxidase test (IPT) for detection of rinderpest.
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Affiliation(s)
- R A Shah
- National Biotechnology Centre, Indian Veterinary Research Institute, Izatnagar 243 122, UP, India
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Adams MM, Fink SE, Janssen WGM, Shah RA, Morrison JH. Estrogen modulates synapticN-methyl-D-aspartate receptor subunit distribution in the aged hippocampus. J Comp Neurol 2004; 474:419-26. [PMID: 15174084 DOI: 10.1002/cne.20148] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Estrogen interacts with N-methyl-D-aspartate (NMDA) receptors to regulate multiple aspects of morphological and functional plasticity. In hippocampus, estrogen increases both dendritic spine density and synapse number, and NMDA antagonists block these effects. Thus, estrogen-mediated hippocampal plasticity may be of particular importance in the context of age-related changes in endocrine status and cognitive performance. NR1 levels per synapse are increased in CA1 by estrogen in aged rats but not young rats, although no information is available on estrogen-induced synaptic alterations in other NMDA receptor subunits that might impact function. Therefore, the present study was designed to investigate the effect of estrogen on the synaptic and subsynaptic distributions of the NMDA receptor subunits, NR2A and NR2B in CA1 pyramidal cells, within the context of aging. Our results demonstrated that the overall synaptic levels of NR2A and NR2B are similar in young and aged female rats, regardless of estrogen treatment. However, in the aged CA1, estrogen restores NR2B levels back to young levels in the lateral portions of the active synaptic zone. Thus, estrogen may impact the mobility of NMDA receptors across the synapse and, in the process, restore a more youthful synaptic profile. These findings have important implications for the mechanism of estrogen-induced alterations in NMDA receptor-mediated processes, particularly in the context of aging.
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Affiliation(s)
- Michelle M Adams
- Department of Geriatrics and Adult Development, Mount Sinai School of Medicine, New York, New York 10029, USA
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Adams MM, Shah RA, Janssen WG, Morrison JH. Different modes of hippocampal plasticity in response to estrogen in young and aged female rats. Proc Natl Acad Sci U S A 2001; 98:8071-6. [PMID: 11427724 PMCID: PMC35469 DOI: 10.1073/pnas.141215898] [Citation(s) in RCA: 169] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2001] [Accepted: 05/02/2001] [Indexed: 11/18/2022] Open
Abstract
Estrogen regulates hippocampal dendritic spine density and synapse number in an N-methyl-D-aspartate (NMDA) receptor-dependent manner, and these effects may be of particular importance in the context of age-related changes in endocrine status. We investigated estrogen's effects on axospinous synapse density and the synaptic distribution of the NMDA receptor subunit, NR1, within the context of aging. Although estrogen induced an increase in axospinous synapse density in young animals, it did not alter the synaptic representation of NR1, in that the amount of NR1 per synapse was equivalent across groups. Estrogen replacement in aged female rats failed to increase axospinous synapse density; however, estrogen up-regulated synaptic NR1 compared with aged animals with no estrogen. Therefore, the young and aged hippocampi react differently to estrogen replacement, with the aged animals unable to mount a plasticity response generating additional synapses, yet responsive to estrogen with respect to additional NMDA receptor content per synapse. These findings have important implications for estrogen replacement therapy in the context of aging.
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Affiliation(s)
- M M Adams
- Kastor Neurobiology of Aging Laboratories, Fishberg Research Center for Neurobiology, Mount Sinai School of Medicine, New York, NY 10029, USA
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Katz DS, Loud PA, Klippenstein DL, Shah RA, Grossman ZD. Extra-thoracic findings on the venous phase of combined computed tomographic venography and pulmonary angiography. Clin Radiol 2000; 55:177-81. [PMID: 10708608 DOI: 10.1053/crad.1999.0370] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A growing consensus is that pulmonary embolism and thrombosis represent different aspects of the same disease, and a single study that accurately defines both pulmonary emboli and deep venous thrombosis would be a desirable examination. The purpose of this pictorial review is to demonstrate the extra-thoracic findings on the venous phase of such a study, which combines computed tomographic venography and pulmonary angiography.
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Affiliation(s)
- D S Katz
- Department of Radiology, Winthrop University Hospital, Mineola, NY 11501, USA
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Nimchinsky EA, Young WG, Yeung G, Shah RA, Gordon JW, Bloom FE, Morrison JH, Hof PR. Differential vulnerability of oculomotor, facial, and hypoglossal nuclei in G86R superoxide dismutase transgenic mice. J Comp Neurol 2000; 416:112-25. [PMID: 10578106 DOI: 10.1002/(sici)1096-9861(20000103)416:1<112::aid-cne9>3.0.co;2-k] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In recent years, several mouse models of amyotrophic lateral sclerosis (ALS) have been developed. One, caused by a G86R mutation in the superoxide dismutase-1 (SOD-1) gene associated with familial ALS, has been subjected to extensive quantitative analyses in the spinal cord. However, the human form of ALS includes pathology elsewhere in the nervous system. In the present study, analyses were extended to three motor nuclei in the brainstem. Mutant mice and control littermates were evaluated daily, and mutants, along with their littermate controls, were killed when they were severely affected. Brains were removed after perfusion and processed for Nissl staining, the samples were randomized, and the investigators were blinded to their genetic status. Stereologic methods were used to estimate the number of neurons, mean neuronal volumes, and nuclear volume in three brainstem motor nuclei known to be differentially involved in the human form of the disease, the oculomotor, facial, and hypoglossal nuclei. In the facial nucleus, neuron number consistently declined (48%), an effect that was correlated with disease severity. The nuclear volume of the facial nucleus was smaller in the SOD-1 mutant mice (45.7% difference from control mice) and correlated significantly with neuron number. The oculomotor and hypoglossal nuclei showed less extreme involvement (<10% neuronal loss overall), with a trend toward fewer neurons in the hypoglossal nucleus of animals with severe facial nucleus involvement. In the oculomotor nucleus, neuronal loss was seen only once in five mice, associated with very severe disease. There was no significant change in the volume of individual neurons in any of these three nuclei in any transgenic mouse. These results suggest that different brainstem motor nuclei are differentially affected in this SOD-1 mutant model of ALS. The relatively moderate and late involvement of the hypoglossal nucleus indicates that, although the general patterns of neuronal pathology match closely those seen in ALS patients, some differences exist in this transgenic model compared with the progression of the disease in humans. However, these patterns of cellular vulnerability may provide clues for understanding the differential susceptibility of neural structures in ALS and other neurodegenerative diseases.
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Affiliation(s)
- E A Nimchinsky
- Kastor Neurobiology of Aging Laboratories and Fishberg Research Center for Neurobiology, Mount Sinai School of Medicine, New York, New York 10029, USA
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Lane MJ, Katz DS, Shah RA, Rubin GD, Jeffrey RB. Active arterial contrast extravasation on helical CT of the abdomen, pelvis, and chest. AJR Am J Roentgenol 1998; 171:679-85. [PMID: 9725295 DOI: 10.2214/ajr.171.3.9725295] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- M J Lane
- Department of Radiology, Stanford University Medical Center, CA 94305, USA
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Silverman Sol, Bilimoria KF, Bhargava K, Mani NJ, Shah RA. Cytologic, histologic and clinical correlations of precancerous and cancerous oral lesions in 57,518 industrial workers of Gujarat, India. Acta Cytol 1977; 21:196-8. [PMID: 266329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A group of 57,518 industrial workers of Gujarat, India were screened for oral cancerous and precancerous oral lesions between 1967 and 1971. All subjects were 35 years of age or older and 95 per cent were males. The 27,841 oral lesions found were examined by cytologic scrapings and 13,230 were biopsied. Also, all lesions were followed clinically to assure a malignancy was not overlooked. There were 51 oral cancers diagnosed (.18% of the lesions and .09% of the entire study group). Computing all the cytologic smears, there was an overall accuracy exceeding 99 per cent. When assessing just the malignancies, the accuracy decreased to 80.4 per cent. Since there was a high degree of clinical suspicion on the part of the screeners, only one unsuspected cancer was discovered by cytology. There were four false positive interpretations; and 53 other specimens classified as "suspicious" subsequently were shown to be benign. Although exfoliative cytology has proved useful in assessing oral lesions as an adjunct to biopsy, the low frequency of oral cancer limits the value of this technique as a screening modality. Most false negatives have been associated with leukoplakic (hyperkeratotic) lesions. Therefore, in a persistent oral lesion, even though a cytologic scraping may not be suspicious or characteristic of malignancy, a biopsy should still be strongly considered.
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