1
|
Jiao L, Bujnowski D, Liu P, Bakota E, Liu L, Ye Y, Dewangan A, Duong CN, Kviten E, Zaheer S, Zangeneh A, Roy R, Floyd J, Monroy J, Wiltz-Beckham D. Asthma and clinical outcomes of COVID-19 in a community setting. Public Health 2024; 226:84-90. [PMID: 38016200 DOI: 10.1016/j.puhe.2023.10.040] [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: 06/07/2023] [Revised: 10/16/2023] [Accepted: 10/24/2023] [Indexed: 11/30/2023]
Abstract
OBJECTIVES The association between asthma and COVID-19 mortality remains inconclusive. We examined the association between asthma and clinical outcomes of patients with COVID-19. STUDY DESIGN A case-control study based on a surveillance cohort in Harris County, Texas. METHODS Using the data of 21,765 patients who reported having at least one chronic health condition, we investigated the association between asthma and COVID-19 severity, characterized primarily by hospitalization and death. Unconditional logistic regression models were used to estimate the multivariable odds ratio (mOR) and its 95 % confidence interval (CI) of COVID-19 severity associated with asthma and other chronic lung diseases, adjusting for demographic and other comorbidities. A P-value < 0.005 was considered statistically significant after correcting multiple testing. RESULTS In total, 3034 patients (13.9 %) had asthma, and 774 (3.56 %) had other chronic lung diseases. The case death rate among patients with asthma and other chronic lung diseases was 0.75 % and 19.0 %, respectively. Compared to patients without the respective conditions, patients with asthma had lower odds of death (mOR = 0.44, 95 % CI: 0.27-0.69), while patients with other chronic lung diseases had higher odds of hospitalization (mOR = 2.02, 95 % CI: 1.68-2.42) and death (mOR = 1.95, 95 % CI: 1.52-2.49) (P-values < 0.005). Risk factors for COVID-19 mortality included older age, male gender, diabetes, obesity, hypertension, cardiovascular disease, active cancer, and chronic kidney disease. CONCLUSIONS The public health surveillance data suggested that preexisting asthma was inversely associated with COVID-19 mortality.
Collapse
Affiliation(s)
- L Jiao
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA.
| | - D Bujnowski
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - P Liu
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - E Bakota
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - L Liu
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - Y Ye
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - A Dewangan
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - C N Duong
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - E Kviten
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - S Zaheer
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - A Zangeneh
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - R Roy
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - J Floyd
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - J Monroy
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| | - D Wiltz-Beckham
- Harris County Public Health, 1111 Fannin Street, Houston, TX, 77002, USA
| |
Collapse
|
2
|
Roy R, Cannata A, Bhatti P, Daniel A, Rosmini S, Birkenshaw A, Rind I, Sado D, Piper S, Scott P, McDonagh T, Bromage D. Accuracy of ICD-10 codes for patients with acute myocarditis: a retrospective study at a large tertiary centre in London, UK. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1704] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Acute myocarditis (AM) is an inflammatory disease of the myocardium that is associated with heterogenous clinical presentations, which may be non-specific. Furthermore, several cardiac diseases can mimic its clinical phenotype. Research in AM frequently utilises ICD-10 codes from hospital admissions for case identification. We retrospectively confirmed or refuted a diagnosis of AM according to ESC Position Statement criteria in patients with an ICD-10 code for AM.
Methods
We performed a single-centre retrospective analysis of all unique admissions with ICD-10 codes corresponding to myocarditis or myopericarditis in the first three coding positions at King's College Hospital, London, United Kingdom. The diagnosis was classified as “confirmed” if proven by cardiac magnetic resonance imaging (CMR) or endomyocardial biopsy (EMB) or “suspected” in the absence of CMR or EMB if other ESC Position Statement criteria were met. To identify additional cases, we used an open-source retrieval system for unstructured clinical data (CogStack). We searched hospital and Intensive Care Unit (ICU) discharge summaries for inpatients discharged alive containing the keywords “myocarditis” or “myopericarditis”. We also searched for patients who died during the study period where the keywords “myocarditis” or “myopericarditis” were included on the death notification.
Results
We identified 308 unique admissions with an ICD-10 code for myocarditis or myopericarditis in this study, presenting between 2008 and 2020 (Figure 1). Overall, 26.0% of patients (n=80/308) could be excluded from a diagnosis of AM on review of the clinical summary. A total of 16.2% of patients (n=50/308) had insufficient evidence of AM, 1.9% (n=6/308) had not had coronary artery disease excluded as a culprit for the presentation, and 10.1% (n=31/308) had an alternative diagnosis. Only 45.8% (n=141/308) of all patients met criteria for suspected or confirmed AM. Of those, 86.5% (n=122/141) of cases were confirmed by CMR. Overall, 39.6% of patients with an ICD-10 code indicating AM had a confirmed diagnosis. An additional 46 suspected and 197 confirmed cases were identified using open-source retrieval from unstructured clinical data.
Conclusion
AM has heterogenous and sometimes non-specific clinical presentations, which may be compounded by limited access to CMR and EMB. We identified significant misclassification using ICD-10 codes. It is crucial to ensure that studies investigating AM include only patients meeting appropriate diagnostic criteria, thereby ensuring a high-quality evidence base in this disease.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- R Roy
- King's College London , London , United Kingdom
| | - A Cannata
- King's College London , London , United Kingdom
| | - P Bhatti
- King's College London , London , United Kingdom
| | - A Daniel
- King's College London , London , United Kingdom
| | - S Rosmini
- King's College London , London , United Kingdom
| | | | - I Rind
- King's College London , London , United Kingdom
| | - D Sado
- King's College London , London , United Kingdom
| | - S Piper
- King's College London , London , United Kingdom
| | - P Scott
- King's College London , London , United Kingdom
| | - T McDonagh
- King's College London , London , United Kingdom
| | - D Bromage
- King's College London , London , United Kingdom
| |
Collapse
|
3
|
Ahmed F, Roy R. A Literature Review of Diagnostic Applicability of ICD 11 Classification of Personality Disorders in Comparison with ICD 10. Eur Psychiatry 2022. [PMCID: PMC9564016 DOI: 10.1192/j.eurpsy.2022.1142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Introduction Personality disorders are frequently encountered by all healthcare professionals and can often pose a diagnostic dilemma due to the crossover of different traits amongst the various subtypes. The ICD 10 classification comprised of succinct parameters of the 10 subtypes of personality disorders but lacked a global approach to address the complexity of the disease. The ICD 11 classification provides a more structural approach to aid in clinical diagnosis. Objectives A literature review of the diagnostic applicability of ICD 11 classification of personality disorders is presented in comparison with the ICD 10 classification. Methods A retrospective analysis of the literature outlining the ICD 10 and 11 classifications of personality disorders, exploring the differences in evidence-based applications of both. Results The ICD 11 classification of personality disorders supersedes the ICD 10 classification in describing the severity of the personality dysfunction in conjunction with a wide range of trait domain qualifiers, thus enabling the clinician to portray the disease dynamically. The current evidence available on the utility of the ICD 11 classification gives a promising outlook for its application in clinical settings. Conclusions The ICD 11 has transformed the classification of personality disorders by projecting a dimensional description of personality functioning, aiming to overcome the diagnostic deficiencies in the ICD 10 classification. The versatility offered by the application of the ICD 11 classification can be pivotal in reshaping the focus and intensity of clinical management of the disease. Disclosure No significant relationships.
Collapse
|
4
|
Jonniya NA, Sk MF, Roy R, Kar P. Discovery of potential competitive inhibitors against With-No-Lysine kinase 1 for treating hypertension by virtual screening, inverse pharmacophore-based lead optimization, and molecular dynamics simulations. SAR QSAR Environ Res 2022; 33:63-87. [PMID: 35078380 DOI: 10.1080/1062936x.2021.2023218] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
The With-No-Lysine (WNK) has received attention because of its involvement in hypertension. Genetic mutation in the genes of WNK, leading to its overexpression, has been reported in Familial Hyperkalaemic Hypertension, and thus WNK is considered a potential drug target. Herein, we have performed a high-throughput virtual screening of ~11,000 compounds, mainly the natural phytochemical compounds and kinase inhibitory libraries, to find potential competitive inhibitors against WNK1. Initially, candidates with a docking score of ~ -10.0 kcal/mol or less were selected to further screen their good pharmacological properties by applying absorption, distribution, metabolism, excretion, and toxicity (ADMET). Finally, six docked compounds bearing appreciable binding affinities and WNK1 selectivity were complimented with 500 ns long all-atom molecular dynamic simulations. Subsequently, the MMPBSA scheme (Molecular Mechanics Poisson Boltzmann Surface Area) suggested three phytochemical compounds, C00000947, C00020451, and C00005031, with favourable binding affinity against WNK1. Among them, C00000947 acts as the most potent competitive inhibitor of WNK1. Further, inverse pharmacophore-based lead optimization of the C00000947 leads to one potential compound, meciadanol, which shows better binding affinity and specificity than C00000947 towards WNK1, which may be further exploited to develop effective therapeutics against WNK1-associated hypertension after in vitro and in vivo validation.
Collapse
Affiliation(s)
- N A Jonniya
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, India
| | - M F Sk
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, India
| | - R Roy
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, India
| | - P Kar
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, India
| |
Collapse
|
5
|
Sk MF, Haridev S, Roy R, Kar P. Investigating potency of TMC-126 against wild-type and mutant variants of HIV-1 protease: a molecular dynamics and free energy study. SAR QSAR Environ Res 2021; 32:941-962. [PMID: 34787532 DOI: 10.1080/1062936x.2021.1999318] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
A detailed computational study was performed to investigate the conformational changes of flap region and the mechanism underlying the binding of the inhibitor TMC-126 to HIV-1 protease (PR1) and its mutant variants through molecular dynamics simulations in conjunction with the molecular mechanics Poisson-Boltzmann (MM-PBSA) free energy calculation. Further, we have studied the effectiveness of the inhibitor against HIV-2 protease (PR2). The MM-PBSA calculation suggests that TMC-126 loses its potency against mutant variants and PR2 compared to wild-type PR1 mainly due to the loss in intermolecular electrostatic interactions. The potency of the inhibitor decreases in the order: wild type PR1 > M46L > MDR20 > I50V > PR2 > V32I > A28S. Our study reveals that the flap of PR1 adopts a semi-open conformation due to the mutation I50V or MDR20. The dissimilar nature of the movement of the flap tip of both monomers is evident from the dynamic cross-correlation map. The protein structural network analysis displays that mutation causes structural rearrangements and changes the communication path between residues. Overall, we believe our study may help explore and accelerate the development of novel HIV-1/HIV-2 protease inhibitors with better potency.
Collapse
Affiliation(s)
- M F Sk
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, India
| | - S Haridev
- Department of Physics, Indian Institute of Technology Indore, Indore, India
| | - R Roy
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, India
| | - P Kar
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, India
| |
Collapse
|
6
|
Mukherjee S, O'Connor H, Harman R, O'Donovan M, Debiram-Beecham I, Alias B, Bailey A, Bateman A, de Caestecker J, Crosby T, Falk S, Gollins S, Hawkins M, Levy S, Radhakrishna G, Roy R, Sripadam R, Fitzgerald R. P-109 CYTOFLOC: Evaluation of a non-endoscopic immunocytological device (Cytosponge™) for post-chemo-radiotherapy surveillance in patients with oesophageal cancer – a feasibility study. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
7
|
Mandal A, Baneh H, Roy R, Notter DR. Correction to: Genetic diversity and population structure of Jamunapari goat in India using pedigree analysis. Trop Anim Health Prod 2021; 53:293. [PMID: 33909174 DOI: 10.1007/s11250-021-02710-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ajoy Mandal
- Animal Breeding Section, ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, 741235, India.
| | - Hasan Baneh
- Digital Agriculture Laboratory (DAL), Skolkovo Institute of Science and Technology, 121205, Moscow, Russia
| | - R Roy
- , Shivpuri, Lalbahadur Shastri Nagar, Patna, Bihar, 800023, India
| | - D R Notter
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| |
Collapse
|
8
|
Mandal A, Baneh H, Roy R, Notter DR. Genetic diversity and population structure of Jamunapari goat in India using pedigree analysis. Trop Anim Health Prod 2021; 53:218. [PMID: 33745019 DOI: 10.1007/s11250-021-02638-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 02/22/2021] [Indexed: 11/29/2022]
Abstract
Pedigree records of 6821 Jamunapari goats of India were collected from 1980 to 2011 and used to evaluate the population structure and genetic diversity in this flock. Animals born between 2009 and 2011 represented the current reference population. The average pedigree completeness index (PCI) and numbers of equivalent complete generations (EqG) were estimated for the entire (PCI = 0.18, EqG = 2.24) and reference (PCI = 0.31, EqG = 3.45) populations. The average generation interval was 3.33 years. The average inbreeding coefficient and the average relatedness were 0.46 and 1.06%, respectively, for the entire population and 0.77 and 3.87% for the reference population. The rate of inbreeding was 0.06% per generation. The effective population size (Ne), estimated from increases in inbreeding coefficients between the first and third equivalent complete generations, was 52.65, but periodic introductions of unrelated breeding males resulted in average inbreeding levels in the reference population that were lower than those predicted from the estimate of Ne. Effective numbers of founders (fe), ancestors (fa), founder genomes equivalents (fg), and non-founder genomes (fng) were 51, 39, 25.8, and 48.2, respectively. The fe/fa ratio in the reference population was 1.31 and indicated that occasional bottlenecks had occurred in the population. The 14 most influential ancestors contributed 50% of the genetic variability in the reference population, with a maximum individual contribution of 9.25%. Approximately 1.9% of the initial heterozygosity had been lost from the population, indicating that substantial genetic diversity still exists in this flock.
Collapse
Affiliation(s)
- Ajoy Mandal
- Animal Breeding Section, ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, West Bengal, 741235, India.
| | - Hasan Baneh
- Digital Agriculture Laboratory (DAL), Skolkovo Institute of Science and Technology, Moscow 121205, Russia
| | - R Roy
- Shivpuri, Lalbahadur Shastri Nagar, Bihar, Patna, 800023, India
| | - D R Notter
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| |
Collapse
|
9
|
Lawrence C, Seckold R, Smart C, King BR, Howley P, Feltrin R, Smith TA, Roy R, Lopez P. Increased paediatric presentations of severe diabetic ketoacidosis in an Australian tertiary centre during the COVID-19 pandemic. Diabet Med 2021; 38:e14417. [PMID: 33020999 PMCID: PMC7646057 DOI: 10.1111/dme.14417] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/15/2020] [Accepted: 09/27/2020] [Indexed: 12/28/2022]
Abstract
AIMS To determine if the frequency of severe diabetic ketoacidosis at presentation of new-onset type 1 diabetes to an Australian tertiary centre increased during the initial period of restrictions resulting from the COVID-19 pandemic (March to May 2020). METHODS Data were collected on presentations of newly diagnosed type 1 diabetes as well as on all paediatric presentations to the emergency department of a tertiary centre between 2015 and 2020. Data from the period of initial COVID restrictions in Australia (March to May 2020) were compared to the period March to May of the previous 5 years (pre-pandemic periods). RESULTS The number of new diagnoses of type 1 diabetes was comparable in the pandemic period and pre-pandemic periods (11 in 2020 vs range 6-10 in 2015-2019). The frequency of severe diabetic ketoacidosis was significantly higher in the pandemic period compared to the pre-pandemic periods (45% vs 5%; P <0.003), odds ratio 16.7 (95% CI 2.0, 194.7). The overall frequency of diabetic ketoacidosis was also significantly higher during the pandemic period (73% vs 26%; P <0.007), odds ratio 7.5 (95% CI 1.7, 33.5). None of the individuals tested positive for COVID-19. Presentations of people aged <18 years to the emergency department decreased by 27% in the pandemic period compared to the average of the pre-pandemic periods (4799 vs 6550; range 6268 to 7131). CONCLUSIONS A significant increase in the frequency of severe diabetic ketoacidosis at presentation of type 1 diabetes was observed during the initial period of COVID-19 restrictions. We hypothesize that concern about presenting to hospital during a pandemic led to a delay in diagnosis. These data have important implications for advocacy of seeking healthcare for non-pandemic-related conditions during a global pandemic.
Collapse
Affiliation(s)
- C. Lawrence
- John Hunter Children’s HospitalNewcastleNSWAustralia
- School of Medicine and Public HealthUniversity of NewcastleNewcastleNSWAustralia
| | - R. Seckold
- John Hunter Children’s HospitalNewcastleNSWAustralia
- Hunter Medical Research InstituteNewcastleNSWAustralia
- School of Medicine and Public HealthUniversity of NewcastleNewcastleNSWAustralia
| | - C. Smart
- John Hunter Children’s HospitalNewcastleNSWAustralia
- Hunter Medical Research InstituteNewcastleNSWAustralia
| | - B. R. King
- John Hunter Children’s HospitalNewcastleNSWAustralia
- Hunter Medical Research InstituteNewcastleNSWAustralia
- School of Medicine and Public HealthUniversity of NewcastleNewcastleNSWAustralia
| | - P. Howley
- School of Mathematical and Physical Sciences/StatisticsUniversity of NewcastleNewcastleNSWAustralia
| | - R. Feltrin
- John Hunter Children’s HospitalNewcastleNSWAustralia
| | - T. A. Smith
- Hunter Medical Research InstituteNewcastleNSWAustralia
- School of Medicine and Public HealthUniversity of NewcastleNewcastleNSWAustralia
| | - R. Roy
- Hunter Medical Research InstituteNewcastleNSWAustralia
- School of Medicine and Public HealthUniversity of NewcastleNewcastleNSWAustralia
| | - P. Lopez
- John Hunter Children’s HospitalNewcastleNSWAustralia
- Hunter Medical Research InstituteNewcastleNSWAustralia
- School of Medicine and Public HealthUniversity of NewcastleNewcastleNSWAustralia
| |
Collapse
|
10
|
Roy R. 324P COVID era: Perception of oncologists from a developing nation. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
11
|
Johnston SD, López-Fernández C, Arroyo F, Roy R, Holt WV, Gosálvez J. Protamine composition of koala and wombat spermatozoa provides new insights into DNA stability following cryopreservation. Reprod Fertil Dev 2020; 31:1558-1566. [PMID: 31167697 DOI: 10.1071/rd18512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 05/02/2019] [Indexed: 11/23/2022] Open
Abstract
To investigate differences in the post-thaw DNA stability of koala and wombat spermatozoa, protamine amino acid sequences were compared and it was found that there were three more arginine residues for the wombat. Koala and wombat spermatozoa, cryopreserved using identical protocols, were examined for changes in sperm DNA fragmentation (SDF) dynamics over 24h of post-thaw incubation. Following validation of a wombat sperm chromatin dispersion test, wombat DNA showed a rate of SDF that was 6-fold higher than for koala spermatozoa (P=0.038). Finally, we examined whether expected differences in chromatin compactness, associated with protamine sequence, had an effect on restriction site accessibility of sperm DNA. Thawed spermatozoa were exposed to Alu I and EcoR1 endonuclease restriction enzymes and the SDF dynamics were observed. Koala spermatozoa exposed to Alu I showed a greater rate of SDF (P=0.01), whereas wombat spermatozoa exposed to EcoR1 showed a greater rate of SDF (P=0.032). We conclude that restriction sites in these species are differentially present or exposed and potentially account for differences in SDF dynamics. Although differences in the arginine composition of protamine may explain relative differences in SDF following cryopreservation, they do not support the hypothesis that increased arginine composition increases DNA stability; rather, increased arginine composition in the wombat may reduce post-thaw chromatin swelling.
Collapse
Affiliation(s)
- S D Johnston
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, Qld 4343, Australia; and Corresponding author.
| | - C López-Fernández
- Department of Biology, Autonomous University of Madrid, Cantoblanco, Madrid, 28049, Spain
| | - F Arroyo
- Department of Biology, Autonomous University of Madrid, Cantoblanco, Madrid, 28049, Spain
| | - R Roy
- Department of Biology, Autonomous University of Madrid, Cantoblanco, Madrid, 28049, Spain
| | - W V Holt
- Academic unit of Reproductive and Developmental Medicine, University of Sheffield, Sheffield, S10 2TN, UK
| | - J Gosálvez
- Department of Biology, Autonomous University of Madrid, Cantoblanco, Madrid, 28049, Spain
| |
Collapse
|
12
|
Malik F, Middleton Z, Haque F, Tambe N, Roy R. P-273 Real-world experience of definitive chemoradiation in esophageal cancer: Correlation of tumour length, toxicity and disease control. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
13
|
Swinson D, Hall P, Lord S, Marshall H, Ruddock S, Allmark C, Cairns D, Waters J, Wadsley J, Falk S, Roy R, Joseph M, Nicoll J, Kamposioras K, Tillett T, Cummins S, Grumett S, Stokes Z, Waddell T, Chatterjee A, Garcia A, Khan M, Petty R, Seymour M. OPTIMIZING CHEMOTHERAPY FOR FRAIL AND/OR ELDERLY PATIENTS WITH ADVANCED GASTROESOPHAGEAL CANCER (AGOAC): THE GO2 PHASE III TRIAL. J Geriatr Oncol 2019. [DOI: 10.1016/s1879-4068(19)31133-6] [Citation(s) in RCA: 2] [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]
|
14
|
Alam A, Taye N, Patel S, Thube M, Mullick J, Shah VK, Pant R, Roychowdhury T, Banerjee N, Chatterjee S, Bhattacharya R, Roy R, Mukhopadhyay A, Mogare D, Chattopadhyay S. SMAR1 favors immunosurveillance of cancer cells by modulating calnexin and MHC I expression. Neoplasia 2019; 21:945-962. [PMID: 31422285 PMCID: PMC6706529 DOI: 10.1016/j.neo.2019.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 05/08/2019] [Accepted: 07/17/2019] [Indexed: 01/17/2023] Open
Abstract
Down-regulation or loss of MHC class I expression is a major mechanism used by cancer cells to evade immunosurveillance and increase their oncogenic potential. MHC I mediated antigen presentation is a complex regulatory process, controlled by antigen processing machinery (APM) dictating immune response. Transcriptional regulation of the APM that can modulate gene expression profile and their correlation to MHC I mediated antigen presentation in cancer cells remain enigmatic. Here, we reveal that Scaffold/Matrix-Associated Region 1- binding protein (SMAR1), positively regulates MHC I surface expression by down-regulating calnexin, an important component of antigen processing machinery (APM) in cancer cells. SMAR1, a bonafide MAR binding protein acts as a transcriptional repressor of several oncogenes. It is down-regulated in higher grades of cancers either through proteasomal degradation or through loss of heterozygosity (LOH) at the Chr.16q24.3 locus where the human homolog of SMAR1 (BANP) has been mapped. It binds to a short MAR region of the calnexin promoter forming a repressor complex in association with GATA2 and HDAC1. A reverse correlation between SMAR1 and calnexin was thus observed in SMAR1-LOH cells and also in tissues from breast cancer patients. To further extrapolate our findings, influenza A (H1N1) virus infection assay was performed. Upon viral infection, the levels of SMAR1 significantly increased resulting in reduced calnexin expression and increased MHC I presentation. Taken together, our observations establish that increased expression of SMAR1 in cancers can positively regulate MHC I surface expression thereby leading to higher chances of tumor regression and elimination of cancer cells.
Collapse
Affiliation(s)
- Aftab Alam
- National Centre for Cell Science, Pune, Maharashtra, India
| | - Nandaraj Taye
- National Centre for Cell Science, Pune, Maharashtra, India
| | - Sonal Patel
- National Centre for Cell Science, Pune, Maharashtra, India
| | - Milind Thube
- ICMR-National Institute of Virology, Pune, Maharashtra, India
| | - Jayati Mullick
- ICMR-National Institute of Virology, Pune, Maharashtra, India
| | | | - Richa Pant
- National Centre for Cell Science, Pune, Maharashtra, India
| | | | | | | | | | - Rini Roy
- Netaji Subhas Chandra Bose Cancer Research Institute, Kolkata, India
| | | | - Devraj Mogare
- National Centre for Cell Science, Pune, Maharashtra, India
| | - Samit Chattopadhyay
- National Centre for Cell Science, Pune, Maharashtra, India; Indian Institute of Chemical Biology, Kolkata, India.
| |
Collapse
|
15
|
Tralau-Stewart L, Roy R. Radiology-guided oesophageal stenting for the palliation of dysphagia: a single center experience. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
16
|
Cole R, Minto J, Flattery M, Parikh A, Dong T, Roy R, Bogar L, Morris A, Vega J, Gupta D, Bhatt K, Smith A, Laskar S, Lala A, Shah K, Shah P. Effects of Induction on the Risk of Post-Transplant De Novo DSA. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
17
|
Dong T, Demoss B, Roy R, Smith A, Vega J, Laskar S, Bhatt K, Gupta D, Morris A, Cole R. Sensitization in LVAD Recipients with and without Transfusions. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.1155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
18
|
Nieddu T, Ray T, Rajasree KS, Roy R, Chormaic SN. Simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) 5S 1/2 to 6S 1/2 transition using one-color two-photon excitation. Opt Express 2019; 27:6528-6535. [PMID: 30876236 DOI: 10.1364/oe.27.006528] [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] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/05/2019] [Indexed: 06/09/2023]
Abstract
We experimentally demonstrate a one-color two-photon transition from the 5S1/2 ground state to the 6S1/2 excited state in rubidium (Rb) vapor using a continuous wave laser at 993 nm. The Rb vapor contains both isotopes (85Rb and 87Rb) in their natural abundances. The electric dipole-allowed transitions are characterized by varying the power and polarization of the excitation laser. Since the optical setup is relatively simple, and the energies of the allowed levels are impervious to stray magnetic fields, this is an attractive choice for a frequency reference at 993 nm, with possible applications in precision measurements and quantum information processing.
Collapse
|
19
|
Sun Myint A, Stewart A, Mills J, Sripadam R, Whitmarsh K, Roy R, Franklin A, Dhadda A. Treatment: the role of contact X-ray brachytherapy (Papillon) in the management of early rectal cancer. Colorectal Dis 2019; 21 Suppl 1:45-52. [PMID: 30809905 DOI: 10.1111/codi.14507] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 11/26/2018] [Indexed: 12/13/2022]
Affiliation(s)
- A Sun Myint
- Papillon Suite, Clatterbridge Cancer Centre, Bebington, Wirral, UK.,Translational Medicine Department, University of Liverpool, Liverpool, UK
| | - A Stewart
- St Luke's Cancer Centre, Royal Surrey County Hospital, Guildford, UK.,University of Surrey, Guildford, UK
| | - J Mills
- Nottingham University Hospital, Nottingham, UK
| | - R Sripadam
- Papillon Suite, Clatterbridge Cancer Centre, Bebington, Wirral, UK
| | - K Whitmarsh
- Papillon Suite, Clatterbridge Cancer Centre, Bebington, Wirral, UK
| | - R Roy
- Queen's Centre for Oncology and Haematology, Hull, UK
| | - A Franklin
- St Luke's Cancer Centre, Royal Surrey County Hospital, Guildford, UK
| | - A Dhadda
- Queen's Centre for Oncology and Haematology, Hull, UK
| | | |
Collapse
|
20
|
Garcia-Rodriguez A, de la Casa M, Gosálvez J, Roy R. CAT-262CT Genotype shows higher catalase activity in seminal plasma and lower risk of male infertility. Meta Gene 2018. [DOI: 10.1016/j.mgene.2018.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
21
|
Hung T, Gezari S, Cenko SB, van Velzen S, Blagorodnova N, Yan L, Kulkarni SR, Lunnan R, Kupfer T, Leloudas G, Kong AKH, Nugent PE, Fremling C, Laher RR, Masci FJ, Cao Y, Roy R, Petrushevska T. SIFTING FOR SAPPHIRES: SYSTEMATIC SELECTION OF TIDAL DISRUPTION EVENTS IN iPTF. Astrophys J Suppl Ser 2018; 238:15. [PMID: 31160831 PMCID: PMC6544052 DOI: 10.3847/1538-4365/aad8b1] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We present results from a systematic selection of tidal disruption events (TDEs) in a wide-area (4800 deg2), g + R band, Intermediate Palomar Transient Factory (iPTF) experiment. Our selection targets typical optically-selected TDEs: bright (>60% flux increase) and blue transients residing in the center of red galaxies. Using photometric selection criteria to down-select from a total of 493 nuclear transients to a sample of 26 sources, we then use follow-up UV imaging with the Neil Gehrels Swift Telescope, ground-based optical spectroscopy, and light curve fitting to classify them as 14 Type Ia supernovae (SNe Ia), 9 highly variable active galactic nuclei (AGNs), 2 confirmed TDEs, and 1 potential core-collapse supernova. We find it possible to filter AGNs by employing a more stringent transient color cut (g - r < -0.2 mag); further, UV imaging is the best discriminator for filtering SNe, since SNe Ia can appear as blue, optically, as TDEs in their early phases. However, when UV-optical color is unavailable, higher precision astrometry can also effectively reduce SNe contamination in the optical. Our most stringent optical photometric selection criteria yields a 4.5:1 contamination rate, allowing for a manageable number of TDE candidates for complete spectroscopic follow-up and real-time classification in the ZTF era. We measure a TDE per galaxy rate of 1.7 - 1.3 + 2.9 × 10 - 4 gal - 1 yr - 1 (90% CL in Poisson statistics). This does not account for TDEs outside our selection criteria, thus may not reflect the total TDE population, which is yet to be fully mapped.
Collapse
Affiliation(s)
- T Hung
- Department of Astronomy, University of Maryland, College Park, MD 20742, USA
| | - S Gezari
- Department of Astronomy, University of Maryland, College Park, MD 20742, USA
- Joint Space-Science Institute, University of Maryland, College Park, MD 20742, USA
| | - S B Cenko
- Joint Space-Science Institute, University of Maryland, College Park, MD 20742, USA
- NASA Goddard Space Flight Center, Mail Code 661, Greenbelt, MD 20771, USA
| | - S van Velzen
- Joint Space-Science Institute, University of Maryland, College Park, MD 20742, USA
- Department of Physics, New York University, NY 10003, USA
| | - N Blagorodnova
- Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
| | - Lin Yan
- Caltech Optical Observatories, Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
- Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USA
| | - S R Kulkarni
- Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
| | - R Lunnan
- The Oskar Klein Centre & Department of Astronomy, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
| | - T Kupfer
- Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
| | - G Leloudas
- Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, Denmark
| | - A K H Kong
- Institute of Astronomy, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - P E Nugent
- Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 50B-4206, Berkeley, CA 94720, USA
| | - C Fremling
- Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
| | - Russ R Laher
- Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USA
| | - F J Masci
- Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USA
| | - Y Cao
- Department of Astronomy, University of Washington, Box 351580, U.W., Seattle, WA 98195-1580, USA
- eScience Institute, University of Washington, Box 351570, U.W., Seattle, WA 98195-1580, USA
| | - R Roy
- The Oskar Klein Centre & Department of Astronomy, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
| | - T Petrushevska
- Oskar Klein Centre, Department of Physics, Stockholm University, SE 106 91 Stockholm, Sweden
| |
Collapse
|
22
|
Abstract
Scorpion venom components have multifaceted orientation against bacterial, viral, fungal infections and other neuronal disorders. They can modulate the ion channels (K+, Na+, Cl−, Ca2+) of our body and this concept has been hypothesized in formulating pharmaceuticals. The triumphant achievement of these venom components as formulated anticancer agent in Phase I and Phase II clinical trials allure researchers to excavate beneficial venom components prohibiting DNA replication in malignant tumor cells. This review brings forth the achievements of Science and Technology in classifying the venom components as therapeutics and further application in drug product development.
Collapse
Affiliation(s)
- Arijit Ghosh
- 1Department of Molecular Biology, Netaji Subhas Chandra Bose Cancer Research Institute, 16 A Park Lane, Kolkata, 700016 India
| | - Rini Roy
- 1Department of Molecular Biology, Netaji Subhas Chandra Bose Cancer Research Institute, 16 A Park Lane, Kolkata, 700016 India
| | - Monoswini Nandi
- 2Department of Molecular Biology and Biotechnology, Kalyani University, University Road, Near Kalyani Ghoshpara Railway Station, District Nadia, Kalyani, West Bengal 741235 India
| | - Ashis Mukhopadhyay
- 3Department of Hemato-Oncology, Netaji Subhas Chandra Bose Cancer Research Institute, 16 A Park Lane, Kolkata, 700016 India.,4Netaji Subhas Chandra Bose Cancer Research Institute, Park Street, Kolkata, West Bengal 700016 India
| |
Collapse
|
23
|
Coen O, Karsera L, Tambe N, Roy R. A single centre experience of in-field recurrence following pre-operative radio(chemo)therapy in patients with rectal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
24
|
Roy R, Ang E, Komatsu E, Domalaon R, Bosseboeuf A, Harb J, Hermouet S, Krokhin O, Schweizer F, Perreault H. Absolute Quantitation of Glycoforms of Two Human IgG Subclasses Using Synthetic Fc Peptides and Glycopeptides. J Am Soc Mass Spectrom 2018; 29:1086-1098. [PMID: 29796736 DOI: 10.1007/s13361-018-1900-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 10/04/2017] [Revised: 12/21/2017] [Accepted: 12/21/2017] [Indexed: 06/08/2023]
Abstract
Immunoglobulins, such as immunoglobulin G (IgG), are of prime importance in the immune system. Polyclonal human IgG comprises four subclasses, of which IgG1 and IgG2 are the most abundant in healthy individuals. In an effort to develop an absolute MALDI-ToF-MS quantitative method for these subclasses and their Fc N-glycoforms, (glyco)peptides were synthesized using a solid-phase approach and used as internal standards. Tryptic digest glycopeptides from monoclonal IgG1 and IgG2 samples were first quantified using EEQYN(GlcNAc)STYR and EEQFN(GlcNAc)STFR standards, respectively. For IgG1, a similar glycopeptide where tyrosine (Y) was isotopically labelled was used to quantify monoclonal IgG1 that had been treated with the enzyme Endo-F2, i.e., yielding tryptic glycopeptide EEQYN(GlcNAc)STYR. The next step was to quantify single subclasses within polyclonal human IgG samples. Although ion abundances in the MALDI spectra often showed higher signals for IgG2 than IgG1, depending on the spotting solvent used, determination of amounts using the newly developed quantitative method allowed to obtain accurate concentrations where IgG1 species were predominant. It was observed that simultaneous analysis of IgG1 and IgG2 yielded non-quantitative results and that more success was obtained when subclasses were quantified one by one. More experiments served to assess the respective extraction and ionization efficiencies of EEQYNSTYR/EEQFNSTFR and EEQYN(GlcNAc)STYR/EEQFN(GlcNAc)STFR mixtures under different solvent and concentration conditions. Graphical Abstract ᅟ.
Collapse
Affiliation(s)
- Rini Roy
- Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Evelyn Ang
- Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
- Manitoba Centre for Proteomics and Systems Biology, University of Manitoba, Winnipeg, MB, R3E 3P4, Canada
| | - Emy Komatsu
- Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Ronald Domalaon
- Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Adrien Bosseboeuf
- CRCINA, Inserm U1232, Institut de Recherche en Santé 2, Université de Nantes, Nantes, France
| | - Jean Harb
- Centre de Recherche en Transplantation et Immunologie UMR1064, Inserm, Université de Nantes, Nantes, France
| | - Sylvie Hermouet
- CRCINA, Inserm U1232, Institut de Recherche en Santé 2, Université de Nantes, Nantes, France
| | - Oleg Krokhin
- Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
- Manitoba Centre for Proteomics and Systems Biology, University of Manitoba, Winnipeg, MB, R3E 3P4, Canada
| | - Frank Schweizer
- Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Hélène Perreault
- Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada.
| |
Collapse
|
25
|
García-Rodríguez A, de la Casa M, Peinado H, Gosálvez J, Roy R. Human prostasomes from normozoospermic and non-normozoospermic men show a differential protein expression pattern. Andrology 2018; 6:585-596. [DOI: 10.1111/andr.12496] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 03/20/2018] [Accepted: 03/28/2018] [Indexed: 12/11/2022]
Affiliation(s)
| | | | - H. Peinado
- Microenvironment and Metastasis Group; Molecular Oncology Program; Spanish National Cancer Research Centre (CNIO); Madrid Spain
| | - J. Gosálvez
- Biology Department; University Autónoma of Madrid; Madrid Spain
| | - R. Roy
- Biology Department; University Autónoma of Madrid; Madrid Spain
| |
Collapse
|
26
|
Affiliation(s)
- R. Roy
- Ecole Polytechnique de Montréal, C.P. 6079, Succursale A, Montréal, Québec H3C 3A7, Canada
| | - A. Hébert
- Ecole Polytechnique de Montréal, C.P. 6079, Succursale A, Montréal, Québec H3C 3A7, Canada
| | - G. Marleau
- Ecole Polytechnique de Montréal, C.P. 6079, Succursale A, Montréal, Québec H3C 3A7, Canada
| |
Collapse
|
27
|
Affiliation(s)
- N. H. Macmillan
- The Pennsylvania State University, Materials Research Laboratory, University Park, Pennsylvania 16802
| | - R. Roy
- The Pennsylvania State University, Materials Research Laboratory, University Park, Pennsylvania 16802
| | - P. T. B. Shaffer
- The Carborundum Company, Engineered Systems Group, P.O. Box 414, Niagara Falls, New York 14302
| |
Collapse
|
28
|
Affiliation(s)
- R. Roy
- Institut de Génie Énergétique, École Polytechnique de Montréal Montréal, Québec, Canada H3C 3A 7
| | - A. Hébert
- Institut de Génie Énergétique, École Polytechnique de Montréal Montréal, Québec, Canada H3C 3A 7
| | - G. Marleau
- Institut de Génie Énergétique, École Polytechnique de Montréal Montréal, Québec, Canada H3C 3A 7
| |
Collapse
|
29
|
Affiliation(s)
- G. Marleau
- Ecole Polytechnique de Montréal, Institut de Génie Energétique Montreal, Québec, Canada H3C 3A 7
| | - R. Roy
- Ecole Polytechnique de Montréal, Institut de Génie Energétique Montreal, Québec, Canada H3C 3A 7
| | - A. Hébert
- Ecole Polytechnique de Montréal, Institut de Génie Energétique Montreal, Québec, Canada H3C 3A 7
| |
Collapse
|
30
|
Crosby T, Hurt CN, Falk S, Gollins S, Staffurth J, Ray R, Bridgewater JA, Geh JI, Cunningham D, Blazeby J, Roy R, Maughan T, Griffiths G, Mukherjee S. Long-term results and recurrence patterns from SCOPE-1: a phase II/III randomised trial of definitive chemoradiotherapy +/- cetuximab in oesophageal cancer. Br J Cancer 2017; 116:709-716. [PMID: 28196063 PMCID: PMC5355926 DOI: 10.1038/bjc.2017.21] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/03/2017] [Accepted: 01/16/2017] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The SCOPE-1 study tested the role of adding cetuximab to conventional definitive chemoradiotherapy (dCRT), and demonstrated greater toxicity and worse survival outcomes. We present the long-term outcomes and patterns of recurrence. METHODS SCOPE-1 was a phase II/III trial in which patients were randomised to cisplatin 60 mg m-2 (day 1) and capecitabine 625 mg m-2 bd (days 1-21) for four cycles +/- cetuximab 400 mg m-2 day 1 then by 250 mg m-2 weekly. Radiotherapy consisted of 50 Gy/25# given concurrently with cycles 3 and 4. Recruitment was between February 2008 and February 2012, when the IDMC recommended closure on the basis of futility. RESULTS About 258 patients (dCRT=129; dCRT+cetuximab (dCRT+C)=129) were recruited from 36 centres. About 72.9% (n=188) had squamous cell histology. The median follow-up (IQR) was 46.2 (35.9-48.3) months for surviving patients. The median overall survival (OS; months; 95% CI) was 34.5 (24.7-42.3) in dCRT and 24.7 (18.6-31.3) in dCRT+C (hazard ratio (HR)=1.25, 95% CIs: 0.93-1.69, P=0.137). Median progression-free survival (PFS; months; 95% CI) was 24.1 (15.3-29.9) and 15.9 (10.7-20.8) months, respectively (HR=1.28, 95% CIs: 0.94-1.75; P=0.114). On multivariable analysis only earlier stage, full-dose RT, and higher cisplatin dose intensity were associated with improved OS. CONCLUSIONS The mature analysis demonstrates that the dCRT regimen used in the study provided useful survival outcomes despite its use in patients who were largely unfit for surgery or who had inoperable disease. Given the competing risk of systemic and local failure, future studies should continue to focus on enhancing local control as well as optimising systemic therapy.
Collapse
Affiliation(s)
- T Crosby
- Velindre Cancer Centre, Velindre Hospital, Cardiff CF14 2TL, UK
| | - C N Hurt
- Wales Cancer Trials Unit, Cardiff University, Cardiff CF14 4YS, UK
| | - S Falk
- Bristol Haematology and Oncology Centre, University Hospitals Bristol NHS Foundation Trust, Bristol BS2 8ED, UK
| | - S Gollins
- North Wales Cancer Treatment Centre, Conwy and Denbighshire NHS Trust, Rhyl LL18 5UJ, UK
| | - J Staffurth
- Velindre Cancer Centre, Velindre Hospital, Cardiff CF14 2TL, UK
| | - R Ray
- Wales Cancer Trials Unit, Cardiff University, Cardiff CF14 4YS, UK
| | - J A Bridgewater
- UCL Cancer Institute, University College London, London WC1E 6BT, UK
| | - J I Geh
- Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust Birmingham B15 2GW, UK
| | - D Cunningham
- The Royal Marsden Hospital NHS Foundation Trust, London SM2 5PT, UK
| | - J Blazeby
- Centre for Surgical Research, University of Bristol, Bristol BS8 2PS, UK
| | - R Roy
- Diana Princess of Wales Hospital, Northern Lincolnshire and Goole NHS Foundation Trust, Grimsby DN33 2BA, UK
| | - T Maughan
- CRUK/MRC Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - G Griffiths
- Southampton Clinical Trials Unit, University of Southampton, Southampton SO16 6YD, UK
| | - S Mukherjee
- CRUK/MRC Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| |
Collapse
|
31
|
Hall PS, Lord SR, Collinson M, Marshall H, Jones M, Lowe C, Howard H, Swinson D, Velikova G, Anthoney A, Roy R, Dent J, Cheeseman S, Last K, Seymour MT. A randomised phase II trial and feasibility study of palliative chemotherapy in frail or elderly patients with advanced gastroesophageal cancer (321GO). Br J Cancer 2017; 116:472-478. [PMID: 28095397 PMCID: PMC5318975 DOI: 10.1038/bjc.2016.442] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 11/08/2016] [Accepted: 12/05/2016] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Elderly patients are commonly under-represented in cancer clinical trials. The 321GO was undertaken in preparation for a definitive phase three trial assessing different chemotherapy regimens in a frail and/or elderly population with advanced gastroesophageal (GO) cancer. METHODS Patients with advanced GO cancer considered unfit for conventional dose chemotherapy were randomly assigned in a 1 : 1 : 1 ratio to: epirubicin, oxaliplatin and capecitabine (EOX); oxaliplatin and capecitabine (OX); and capecitabine alone (X) (all 80% of full dose and unblinded). The primary end point was patient recruitment over an 18-month period. A registration study recorded treatment choice for all patients with advanced GO cancer at trial centres. RESULTS A total of 313 patients were considered for palliative chemotherapy for GO cancer over the 18-month period: 115 received full dose treatment, 89 less than standard treatment or entered 321GO and 111 no treatment. Within 321GO, 55 patients were randomly assigned (19 to OX and X; 17 to EOX). Progression-free survival (PFS) for all patients was 4.4 months and by arm 5.4, 5.6 and 3.0 months for EOX, OX and X, respectively. The number of patients with a good overall treatment utility (OTU), a novel patient-centred endpoint, at 12 weeks was 3 (18%), 6 (32%) and 1 (6%) for EOX, OX and X, respectively. At 6 weeks, 22 patients (41%) had experienced a non-haematologic toxicity ⩾grade 3, most commonly lethargy or diarrhoea. The OTU was prognostic for overall survival in patients alive at week 12 (logrank test P=0.0001). CONCLUSIONS It is feasible to recruit elderly and/or frail patients with advanced GO cancer to a randomised clinical trial. The OX is the preferred regimen for further study. Overall treatment utility shows promise as a comparator between treatment regimens for feasibility and randomised trials in the elderly and/or frail GO cancer population.
Collapse
Affiliation(s)
- P S Hall
- Edinburgh Cancer Research Centre, University of Edinburgh, Edinburgh EH4 2XR, UK
| | - S R Lord
- Department of Oncology, University of Oxford, Oxford, UK
| | - M Collinson
- Leeds Institute of Clinical Trials Research, University of Leeds, Leeds, UK
| | - H Marshall
- Leeds Institute of Clinical Trials Research, University of Leeds, Leeds, UK
| | - M Jones
- Leeds Institute of Clinical Trials Research, University of Leeds, Leeds, UK
| | - C Lowe
- NIHR Cancer Research Network Coordinating Centre, Leeds, UK
| | - H Howard
- Leeds Institute of Clinical Trials Research, University of Leeds, Leeds, UK
| | - D Swinson
- Leeds Institute of Cancer and Pathology, University of Leeds, Leeds, UK
| | - G Velikova
- Leeds Institute of Cancer and Pathology, University of Leeds, Leeds, UK
| | - A Anthoney
- Leeds Institute of Cancer and Pathology, University of Leeds, Leeds, UK
| | - R Roy
- Department of Oncology, Castle Hill Hospital, Hull, UK
| | - J Dent
- Department of Oncology, Huddersfield Royal Infirmary, Huddersfield, UK
| | - S Cheeseman
- Department of Oncology, The York Hospital, York, UK
| | - K Last
- Department of Oncology, The York Hospital, York, UK
- Department of Oncology, Bradford Royal Infirmary, Bradford, UK
| | - M T Seymour
- NIHR Cancer Research Network Coordinating Centre, Leeds, UK
| |
Collapse
|
32
|
Chautard C, Beaucaire C, Gérard M, Phrommavanh V, Nos J, Galoisy L, Calas G, Roy R, Descostes M. Geochemical Characterization of U Tailings (Bois Noirs Limouzat, France). ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.proeps.2016.12.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
33
|
Roy R, Banerjee K, Bhattacharya R, Mukhopadhyay A. 159P Antioxidant effect of mangiferin: The potential anti-cancer therapeutic agent. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw579.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
34
|
McLellan M, Doyle MGJ, Bodnar ED, Lopez PG, Domalaon R, Roy R, Cordova K, Schweizer F, Perreault H. Multiplexed azido-group isotopic capture (MAGIC) beads: Selective analysis of azido compounds using a propargyl-based cleavable linker, a proof of concept. Rapid Commun Mass Spectrom 2016; 30:2497-2507. [PMID: 27650360 DOI: 10.1002/rcm.7744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/13/2016] [Accepted: 09/18/2016] [Indexed: 06/06/2023]
Abstract
RATIONALE A cleavable linker is designed and synthesized for the selective capture of azide-containing compounds. This article presents a proof of concept methodology involving the use of peptide-functionalized aminopropyl silica, on which the peptide is constructed by solid-phase peptide synthesis. METHODS The peptide linker has L-propargylglycine (Pra) at one terminal end to allow the conjugation of azide-containing molecules by copper assisted azide alkyne cycloaddition, also known as click reaction. L-Arginine (Arg) is placed just before Pra to permit the release of the captured product by tryptic cleavage. Three glycine (Gly) residues, as part of the linker, are appended to the silica bead to present a spacer section that allows efficient tryptic cleavage devoid of steric hindrance imposed by the bulky bead. The bead composition is Si-O-propyl-NH-Gly-Gly-Gly-Arg-Pra. RESULTS This solid-phase material can be used to capture and release azide-functionalized compounds. The beads are first tested on three azido compounds, 2-azido-2-deoxyglucose (ADG), BOC-p-azido-Phe-OH (BAzPhe), where BOC = tert-butoxycarbonyl, and tetraacetylated-N-azidomannosamine (Ac4 ManNAz). Copper-mediated click reaction conditions are used and released products are characterized by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and tandem MS (MS/MS). CONCLUSIONS This method allows easy identification of captured compounds based on mass and fragmentation analysis. Moreover, it is useful for the analysis of small azide-containing compounds by MALDI-TOF-MS which may not be possible otherwise due to matrix interferences. The insertion of isotopically labeled Arg residues provides the possibility of multiplex analysis, from which the beads have been called MAGIC (for Multiplexed Azido-Group Isotopic Capture). Copyright © 2016 John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- Michelle McLellan
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| | - Michael G J Doyle
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| | - Edward D Bodnar
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| | - Paul G Lopez
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| | - Ronald Domalaon
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| | - Rini Roy
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| | - Katherine Cordova
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| | - Frank Schweizer
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| | - Hélène Perreault
- University of Manitoba, Chemistry Parker 550, 144 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2
| |
Collapse
|
35
|
Roy R, Banerjee K, Bhattacharya R, Mukhopadhyay A. 159P Antioxidant effect of mangiferin: The potential anti-cancer therapeutic agent. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00317-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
36
|
Affiliation(s)
- J.P. Cheng
- Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
| | - D.K. Agrawal
- Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
| | - S. Komarneni
- Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
| | - M. Mathis
- Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
| | - R. Roy
- Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
| |
Collapse
|
37
|
Bharati S, Ghosal A, Datta I, Aggarwal P, Pal A, Roy R. Pundit Madhusudan Gupta – A versatile genius and forefather of modern medical education in India. J ANAT SOC INDIA 2016. [DOI: 10.1016/j.jasi.2016.08.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
38
|
Roy R, Som P, Ghosal A, Kundu R. Bilateral multiple renal arteries with anomalous origin of ovarian arteries on both sides: A case report. J ANAT SOC INDIA 2016. [DOI: 10.1016/j.jasi.2016.08.387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
39
|
Komatsu E, Buist M, Roy R, Gomes de Oliveira AG, Bodnar E, Salama A, Soulillou JP, Perreault H. Characterization of immunoglobulins through analysis of N-glycopeptides by MALDI-TOF MS. Methods 2016; 104:170-81. [DOI: 10.1016/j.ymeth.2016.01.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 12/17/2015] [Accepted: 01/06/2016] [Indexed: 12/11/2022] Open
|
40
|
Hurt C, Bridgewater J, Falk S, Cummins S, Wasan H, Crosby T, Radhakrishna G, Jephcott C, Roy R, McDonald A, Ray R, Joseph G, Staffurth J, Abrams R, Griffiths G, Maughan T, Mukherjee S. O-003 Long-term outcome from the SCALOP trial: a multi-centre randomized phase II trial of gemcitabine or capecitabine-based chemoradiation (CRT) for locally advanced pancreatic cancer (LAPC). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw198.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
41
|
Goyard D, Shiao TC, Fraleigh NL, Vu HY, Lee H, Diaz-Mitoma F, Le HT, Roy R. Expedient synthesis of functional single-component glycoliposomes using thiol-yne chemistry. J Mater Chem B 2016; 4:4227-4233. [PMID: 32264625 DOI: 10.1039/c6tb00344c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The preparation of a set of eight unprecedented amphiphilic neoglycolipids forming liposome nanoparticles is reported. The small library was readily obtained from various peracetylated propargyl glycopyranosides via efficient radical-initiated thiol-yne (TYC) coupling reactions using alkanethiols of different chain lengths. In addition, using sequential thiol-yne, both the nature and positioning of the lipophilic alkanethiols could be varied at will, thus providing unparalleled variability within the glycolipid structures. Two different classes of self-assemblies were prepared from the new neoglycolipids. First, liposomes of 150-300 nm were obtained by solvent injection of their ethanol or tetrahydrofuran (THF) solution in water. The resulting structures were analyzed by dynamic light scattering (DLS) and atomic force microscopy (AFM). The mannosylated lipid nanoparticle (compound 14) showed good stability in water. Alternatively, giant soft unilamellar vesicles were also obtained by film hydration and visualized by differential interference contrast microscopy (DIC). Incorporation of a hydrophobic dye to the solution prior to evaporation allowed visualization by confocal microscopy. Finally, the biological functions of the newly formed glycolipid vesicles were evaluated by multivalent carbohydrate-protein binding interactions using concanavalin A (ConA). Agglutination assays and the binding of glycolipid by dendritic cells (DCs) resulted in an increase in DCs immunostimulatory potential. Importantly, we did not see changes in cells viability at tested doses. This study provides a new, simple and highly efficient methodology to produce novel glyconanoparticle candidate as model in development of vaccine adjuvant and drug delivery system.
Collapse
Affiliation(s)
- D Goyard
- Pharmaqam, Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Succ. Centre-ville, Montréal, Canada H3C 3P8.
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Rishi E, Rishi P, Koundanya VV, Sahu C, Roy R, Bhende PS. Post-traumatic endophthalmitis in 143 eyes of children and adolescents from India. Eye (Lond) 2016; 30:615-20. [PMID: 26869162 DOI: 10.1038/eye.2016.9] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 12/15/2015] [Indexed: 11/09/2022] Open
Abstract
PURPOSE The purpose of this study was to describe clinical features, risk factors, causative organisms, treatment options, and outcomes of post-traumatic endophthalmitis in children and adolescents. METHODS Retrospective interventional case series. Case records of 143 consecutive eyes presenting with post-traumatic endophthalmitis between 1997 and 2007 were reviewed. Univariate and multivariate analysis were done to analyze factors associated with adverse outcomes. RESULTS Mean age at presentation was 9.2 years (median 8 years, range: 2 months to 18 years). Broomstick and hypodermic needle were most common causes for injuries. Common presenting features were cataract (n=51), hypopyon (n=45) and retinal detachment (n=29). Corneal abscess (n=21; OR: 5, CI: 1.4-18.7) and retinal detachment (n=29, OR: 5, CI: 1.6-11.3) were independent risk factors for poor outcome (P=0.04 and 0.012, respectively). Gram-positive bacteria were isolated in 54% (n=31) of culture-positive cases. Forty-nine (34%) patients had ambulatory vision at final visit. Patients who received treatment within 24 h were 3.6 and 9 times more likely to have better anatomical outcome than those treated at 2-7 days, or >7 days, respectively (P=0.0001). Patients undergoing early vitrectomy were 27 times more likely to have better outcome (P=0.0001). CONCLUSION Post-traumatic endophthalmitis in children is more common in boys <10 years of age and most often caused by injury with organic matter. Corneal abscess and retinal detachment are associated with poor outcome. E. fecalis is the most common causative organism. Early vitrectomy results in better outcomes.
Collapse
Affiliation(s)
- E Rishi
- Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralya, Chennai, India
| | - P Rishi
- Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralya, Chennai, India
| | - V V Koundanya
- Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralya, Chennai, India
| | - C Sahu
- Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralya, Chennai, India
| | - R Roy
- Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralya, Chennai, India
| | - P S Bhende
- Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralya, Chennai, India
| |
Collapse
|
43
|
Becker M, Bader A, Roy R, Seifert M, Choi YH, Falk V, Ma N, Stamm C. Modulation of the Post-Infarct Immune Response by Epicardial Application of Decellularized Amniotic Membrane. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
44
|
Gomes de Oliveira AG, Roy R, Raymond C, Bodnar ED, Tayi VS, Butler M, Durocher Y, Perreault H. A systematic study of glycopeptide esterification for the semi-quantitative determination of sialylation in antibodies. Rapid Commun Mass Spectrom 2015; 29:1817-26. [PMID: 26331933 DOI: 10.1002/rcm.7287] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 07/15/2015] [Accepted: 07/23/2015] [Indexed: 05/13/2023]
Abstract
RATIONALE In the expression of recombinant proteins, an important parameter to control or influence is their level of sialylation. Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometric (MS) methods tend to either underestimate (positive mode) or overestimate (negative mode) the content of sialylated vs. neutral glycans in glycoproteins. Esterification methods have been developed for free sialylated glycans and sialylated Asn-glycans, allowing these acidic groups to ionize with the same efficiency as neutral sugars. METHODS Here we describe a method which modifies glycopeptides by esterification. This simple procedure is applied to glycopeptides isolated from tryptic digests of monoclonal antibodies (mAbs), some highly sialylated. To better understand the effect of esterification on the peptide backbone, synthetic EEQYNSTYR was esterified and studied by tandem mass spectrometry (MS/MS). Acetamidation of EEQYNSTYR was also studied as some mAb samples had been overalkylated prior to tryptic digestion. RESULTS As a general trend, ethyl-esterification or lactonization is observed for each sialic acid on glycoforms of EEQYNSTYR (the N-glycosylated tryptic peptide of IgG Fc), depending on the branching position of the sialic acid (α2,3 or α2,6). Esterification also affects the carboxyl groups in the peptide, including the C-terminal COOH. CONCLUSIONS For antibody analysis, MALDI-MS ion abundances give a better semi-quantitative estimate of sialylation levels for esterified than for unreacted glycopeptides. The method is simple to use and helps to differentiate the branching patterns of sialic acids in antibodies.
Collapse
Affiliation(s)
| | - Rini Roy
- Chemistry Department, University of Manitoba, Winnipeg, MB, Canada, R3T2N2
| | - Céline Raymond
- Human Health Therapeutics Portfolio, National Research Council Canada, Montreal, QC, Canada, H4P2R2
- Département de biochimie et médecine moléculaire, Université de Montréal, Montreal, QC, Canada, H3C3J7
| | - Edward D Bodnar
- Chemistry Department, University of Manitoba, Winnipeg, MB, Canada, R3T2N2
| | - Venkata S Tayi
- Microbiology Department, University of Manitoba, Winnipeg, MB, Canada, R3T2N2
| | - Michael Butler
- Microbiology Department, University of Manitoba, Winnipeg, MB, Canada, R3T2N2
| | - Yves Durocher
- Human Health Therapeutics Portfolio, National Research Council Canada, Montreal, QC, Canada, H4P2R2
- Département de biochimie et médecine moléculaire, Université de Montréal, Montreal, QC, Canada, H3C3J7
| | - Hélène Perreault
- Chemistry Department, University of Manitoba, Winnipeg, MB, Canada, R3T2N2
| |
Collapse
|
45
|
Roy R, Pal A, Ghosal A, Kundu R. Anomalous origin of left vertebral artery from arch of aorta and associated vascular anomalies – A case report. J ANAT SOC INDIA 2015. [DOI: 10.1016/j.jasi.2015.07.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
46
|
Rees J, Hurt CN, Gollins S, Mukherjee S, Maughan T, Falk SJ, Staffurth J, Ray R, Bashir N, Geh JI, Cunningham D, Roy R, Bridgewater J, Griffiths G, Nixon LS, Blazeby JM, Crosby T. Patient-reported outcomes during and after definitive chemoradiotherapy for oesophageal cancer. Br J Cancer 2015; 113:603-10. [PMID: 26203761 PMCID: PMC4647690 DOI: 10.1038/bjc.2015.258] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 05/07/2015] [Accepted: 06/15/2015] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Limited data describe patient-reported outcomes (PROs) of localised oesophageal cancer treated with definitive chemoradiotherapy(CRT). The phase 2/3 SCOPE-1 trial assessed the effectiveness of CRT±cetuximab. The trial for the first time provided an opportunity to describe PROs from a multi-centre group of patients treated with CRT that are presented here. METHODS Patients undergoing CRT±cetuximab within the SCOPE-1 trial (258 patients from 36 UK centres) completed generic-, disease- and treatment-specific health-related quality of life (HRQL) questionnaires (EORTC QLQ-C30, QLQ-OES18, Dermatology Life-Quality Index (DLQI)) at baseline and at 7, 13, 24, 52 and 104 weeks. Mean EORTC functional scale scores (>15 point change significant), DLQI scores (>4 point change significant) and proportions of patients (>15% significant) with 'minimal' or 'severe' symptoms are presented. RESULTS Questionnaire response rates were good. At baseline, EORTC functional scores were high (>75%) and few symptoms were reported except for severe problems with fatigue, insomnia and eating-related symptoms (e.g., appetite loss, dysphagia, dry mouth) in both groups(>15%). Functional aspects of health deteriorated and symptoms increased with treatment and by week 13 global quality of life, physical, role and social function significantly deteriorated and more problems with fatigue, dyspnoea, appetite loss and trouble with taste were reported. Recovery occurred by 6 months (except severe fatigue and insomnia in >15% of patients) and maintained at follow-up with no differences between groups. CONCLUSIONS CRT for localised oesophageal cancer has a significant detrimental impact on many aspects of HRQL; however, recovery is achieved by 6 months and maintained with the exception of persisting problems with severe fatigue and insomnia. The data suggest that the HRQL recovery after definitive CRT is quicker, and there is little lasting deficit compared with treatment including surgery. These data need to be compared with HRQL data from studies evaluating treatments including surgery for oesophageal cancer.
Collapse
Affiliation(s)
- J Rees
- Centre for Surgical Research, School of Social and Community Medicine, University of Bristol, Bristol, UK
- Division of Surgery, Head and Neck, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| | - C N Hurt
- Wales Cancer Trials Unit, School of Medicine, Cardiff University, Cardiff, UK
| | - S Gollins
- North Wales Cancer Treatment Centre, Glan Clwyd Hospital, Rhyl, North Wales, UK
| | - S Mukherjee
- CRUK/MRC Oxford Institute for Radiation Oncology, Oxford University, Oxford, UK
| | - T Maughan
- CRUK/MRC Oxford Institute for Radiation Oncology, Oxford University, Oxford, UK
| | - S J Falk
- Bristol Haematology and Oncology Centre, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| | - J Staffurth
- Institute of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, UK
| | - R Ray
- Wales Cancer Trials Unit, School of Medicine, Cardiff University, Cardiff, UK
| | - N Bashir
- Wales Cancer Trials Unit, School of Medicine, Cardiff University, Cardiff, UK
| | - J I Geh
- University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital, Queen Elizabeth Medical Centre, Birmingham, UK
| | - D Cunningham
- The Royal Marsden Hospital NHS Foundation Trust, London, UK
| | - R Roy
- Queen's Centre for Oncology and Haematology, Hull and East Yorkshire NHS Trust, Hull, UK
| | | | - G Griffiths
- Wales Cancer Trials Unit, School of Medicine, Cardiff University, Cardiff, UK
- Faculty of Medicine, University of Southampton, Southampton, UK
| | - L S Nixon
- Wales Cancer Trials Unit, School of Medicine, Cardiff University, Cardiff, UK
| | - J M Blazeby
- Centre for Surgical Research, School of Social and Community Medicine, University of Bristol, Bristol, UK
- Division of Surgery, Head and Neck, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| | - T Crosby
- Velindre Cancer Centre, Velindre Hospital, Cardiff, UK
| |
Collapse
|
47
|
Abstract
It is hypothesized from within an evolutionary framework that females should be less invested in peer relations than males. Investment was operationalized as enjoyment in Study 1 and as preference for interaction in Study 2. In the first study, four- and six-year-old children's enjoyment of peer interaction was observed in 26 groups of same-sex peers. Girls were rated as enjoying their interactions significantly less than boys. In the second study, six- and nine-year-old children were interviewed about the individuals with whom they spend time in their homes and neighborhoods and about the individuals who participate in their favorite activities. The proportion of individuals named by children who were peers was significantly lower for girls than boys both in children's neighborhoods and in children's favorite activities. Results strongly support the hypothesis that females and males have evolved differential preferences for interaction with peers.
Collapse
Affiliation(s)
- J F Benenson
- Department of Educational and Counselling Psychology, McGill University, 3700 McTavish Street, H3A 1Y2, Montreal, Quebec, Canada.
| | - T Morganstein
- Department of Educational and Counselling Psychology, McGill University, 3700 McTavish Street, H3A 1Y2, Montreal, Quebec, Canada
| | - R Roy
- Department of Educational and Counselling Psychology, McGill University, 3700 McTavish Street, H3A 1Y2, Montreal, Quebec, Canada
| |
Collapse
|
48
|
Bodnar E, Ferreira Nascimento T, Girard L, Komatsu E, Lopez P, Gomes de Oliveira AG, Roy R, Smythe T, Zogbi Y, Spearman M, Tayi VS, Butler M, Perreault H. An integrated approach to analyze EG2-hFc monoclonal antibody N-glycosylation by MALDI-MS. CAN J CHEM 2015. [DOI: 10.1139/cjc-2015-0061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The characterization of the N-glycan portion of antibodies has been the subject of several studies involving mass spectrometry. In this article, a workflow is presented that starts with the expression of a monoclonal antibody (EG2-hFc) in Chinese hamster ovary cells and continues with Protein A purification of the antibody. Then the protocol continues with gel electrophoresis. Bands containing the heavy chain are cut and isolated from the gel followed by tryptic digestion to obtain peptides and glycopeptides. The enrichment of glycopeptides by C18 chromatography is described followed by characterization using positive and negative modes MALDI-MS and MS/MS. An exoglycosidase, beta-galactosidase, is used to verify anomericity of linkages in the glycan portion of glycopeptides. In the last step, glycans are detached from glycopeptides using PNGase F labelled with phehylhydrazine and characterized by MALDI-MS/MS. This workflow is reported for the first time for this particular antibody and presents a valuable approach for the analysis of N-glycans on most antibodies and glycoproteins.
Collapse
Affiliation(s)
- Edward Bodnar
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | | | - Lauren Girard
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Emy Komatsu
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Paul Lopez
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | | | - Rini Roy
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Tristan Smythe
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Yann Zogbi
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Maureen Spearman
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Venkata S. Tayi
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Michael Butler
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Hélène Perreault
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| |
Collapse
|
49
|
|
50
|
Roy R. Is Switch Maintenance Therapy Mandatory for EGFR Mutated Patients Initiated on Chemotherapy? Ann Oncol 2015. [DOI: 10.1093/annonc/mdv050.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|