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Pontarini E, Sciacca E, Chowdhury F, Grigoriadou S, Rivellese F, Murray-Brown WJ, Lucchesi D, Fossati-Jimack L, Nerviani A, Jaworska E, Ghirardi GM, Giacomassi C, Emery P, Ng WF, Sutcliffe N, Everett C, Fernandez C, Tappuni A, Seror R, Mariette X, Porcher R, Cavallaro G, Pulvirenti A, Verstappen GM, de Wolff L, Arends S, Bootsma H, Lewis MJ, Pitzalis C, Bowman SJ, Bombardieri M. Serum and Tissue Biomarkers Associated With Composite of Relevant Endpoints for Sjögren Syndrome (CRESS) and Sjögren Tool for Assessing Response (STAR) to B Cell-Targeted Therapy in the Trial of Anti-B Cell Therapy in Patients With Primary Sjögren Syndrome (TRACTISS). Arthritis Rheumatol 2024; 76:763-776. [PMID: 38073013 DOI: 10.1002/art.42772] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/26/2023] [Accepted: 12/04/2023] [Indexed: 02/17/2024]
Abstract
OBJECTIVE This study aimed to identify peripheral and salivary gland (SG) biomarkers of response/resistance to B cell depletion based on the novel concise Composite of Relevant Endpoints for Sjögren Syndrome (cCRESS) and candidate Sjögren Tool for Assessing Response (STAR) composite endpoints. METHODS Longitudinal analysis of peripheral blood and SG biopsies was performed pre- and post-treatment from the Trial of Anti-B Cell Therapy in Patients With Primary Sjögren Syndrome (TRACTISS) combining flow cytometry immunophenotyping, serum cytokines, and SG bulk RNA sequencing. RESULTS Rituximab treatment prevented the worsening of SG inflammation observed in the placebo arm, by inhibiting the accumulation of class-switched memory B cells within the SG. Furthermore, rituximab significantly down-regulated genes involved in immune-cell recruitment, lymphoid organization alongside antigen presentation, and T cell co-stimulatory pathways. In the peripheral compartment, rituximab down-regulated immunoglobulins and auto-antibodies together with pro-inflammatory cytokines and chemokines. Interestingly, patients classified as responders according to STAR displayed significantly higher baseline levels of C-X-C motif chemokine ligand-13 (CXCL13), interleukin (IL)-22, IL-17A, IL-17F, and tumor necrosis factor-α (TNF-α), whereas a longitudinal analysis of serum T cell-related cytokines showed a selective reduction in both STAR and cCRESS responder patients. Conversely, cCRESS response was better associated with biomarkers of SG immunopathology, with cCRESS-responders showing a significant decrease in SG B cell infiltration and reduced expression of transcriptional gene modules related to T cell costimulation, complement activation, and Fcγ-receptor engagement. Finally, cCRESS and STAR response were associated with a significant improvement in SG exocrine function linked to transcriptional evidence of SG epithelial and metabolic restoration. CONCLUSION Rituximab modulates both peripheral and SG inflammation, preventing the deterioration of exocrine function with functional and metabolic restoration of the glandular epithelium. Response assessed by newly developed cCRESS and STAR criteria was associated with differential modulation of peripheral and SG biomarkers, emerging as novel tools for patient stratification.
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Affiliation(s)
| | | | | | | | - Felice Rivellese
- Queen Mary University of London and Bart's Health NHS Trust, London, UK
| | | | | | | | | | | | | | | | | | - Wan Fai Ng
- Newcastle University and NIHR Newcastle Clinical Research Facility, Newcastle upon Tyne, UK
| | | | | | | | - Anwar Tappuni
- Queen Mary University of London and Bart's Health NHS Trust, London, UK
| | - Raphael Seror
- Université' Paris-Saclay, and AP-HP, Hôpital Bicêtre, Le Kremlin, Bicêtre, France
| | - Xavier Mariette
- Université' Paris-Saclay, and AP-HP, Hôpital Bicêtre, Le Kremlin, Bicêtre, France
| | - Raphael Porcher
- Université Paris Cité, Centre de Recherche Épidémiologie et Statistiques Paris, France
| | | | | | - Gwenny M Verstappen
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Liseth de Wolff
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Suzanne Arends
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Hendrika Bootsma
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Miles J Lewis
- Queen Mary University of London and Bart's Health NHS Trust, London, UK
| | | | - Simon J Bowman
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
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Chowdhury F, Rashwan TL, Mondal P, Behazin M, Keech PG, Sharma JS, Krol M. Effect of compaction on bisulfide diffusive transport through MX-80 bentonite. J Contam Hydrol 2024; 264:104341. [PMID: 38701693 DOI: 10.1016/j.jconhyd.2024.104341] [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] [Received: 12/22/2023] [Revised: 03/16/2024] [Accepted: 04/10/2024] [Indexed: 05/05/2024]
Abstract
Canada's deep geological repository (DGR) design includes an engineered barrier system where highly compacted bentonite (HCB) surrounds the copper-coated used fuel containers (UFCs). Microbial-influenced corrosion is a potential threat to long-term integrity of UFC as bisulfide (HS-) may be produced by microbial activities under anaerobic conditions and transported via diffusion through the HCB to reach the UFC surface, resulting in corrosion of copper. Therefore, understanding HS- transport mechanisms through HCB is critical for accurate prediction of copper corrosion allowance. This study investigated HS- transport behaviour through MX-80 bentonite at dry densities 1070-1615 kg m-3 by performing through-diffusion experiments. Following HS- diffusion, bromide (Br-) diffusion and Raman spectroscopy analyses were performed to explore possible physical or mineralogical alterations of bentonite caused by interacting with HS-. In addition, accessible porosity ε was estimated using extended Archie's law. Effective diffusion coefficient of HS- was found 2.5 × 10-12 m2 s-1 and 5.0× 10-12 m2 s-1 for dry densities 1330 and 1070 kg m-3, respectively. No HS- breakthrough was observed for highly compacted bentonite (1535-1615 kg m-3) over the experimental timeframe (170 days). Raman spectroscopy results revealed that HS- reacted with iron in bentonite and precipitated as mackinawite and, therefore, it was immobilized. Finally, results of this study imply that HS- transport towards UFC will be highly controlled by the available iron content and dry density of the buffer material.
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Affiliation(s)
- F Chowdhury
- Department of Civil Engineering, Lassonde School of Engineering, York University, Canada
| | - T L Rashwan
- Department of Civil Engineering, Lassonde School of Engineering, York University, Canada; School of Engineering and Innovation, The Open University, UK
| | - P Mondal
- Department of Civil Engineering, Lassonde School of Engineering, York University, Canada
| | - M Behazin
- Nuclear Waste Management Organization, Canada
| | - P G Keech
- Nuclear Waste Management Organization, Canada
| | - J S Sharma
- Department of Civil Engineering, Lassonde School of Engineering, York University, Canada
| | - M Krol
- Department of Civil Engineering, Lassonde School of Engineering, York University, Canada.
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Rahim MA, Uddin MJ, Jahan J, Chowdhury TA, Momen A, Islam MM, Rahman MA, Bala P, Mamun A, Chowdhury F, Majumder AR. Prediction of Coronary Artery Disease Severity by Using CHA2DS2-VASC-HSF Score in Patients with ST-Elevation Myocardial Infarction. Mymensingh Med J 2023; 32:393-402. [PMID: 37002750] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
CHADS₂ and CHA₂DS₂-VASc scores are widely used in clinical practice and include similar risk factors for the development of coronary artery disease (CAD). It is known that the factors comprising the newly defined CHA₂DS₂-VASC-HSF score promote atherosclerosis and associated with severity of CAD. Objective of the study was to find out the association of the CHA₂DS₂-VASC-HSF score with the severity of CAD in patients with ST elevation myocardial infarction (STEMI). One hundred (100) patients with STEMI were enrolled in this study after considering inclusion and exclusion criteria over a one year period from October, 2017 to September, 2018 in the Department of Cardiology, National Institute of Cardiovascular Diseases, Dhaka, Bangladesh. Coronary angiogram was done within index hospitalization and coronary artery disease severity was assessed by SYNTAX score system. Patients were divided into two groups on the basis of SYNTAX score. Patients with SYNTAX score ≥23 assigned as Group I and SYNTAX score <23 assigned as Group II. The CHA₂DS₂-VASC-HSF score was calculated. Cut-off value of high CHA₂DS₂-VASC-HSF score was ≥4.0. In this study mean age of study population was 51.8±9.8, male patients were predominant (79.0%). Among the studied patients, highest percentage had history of smoking followed by hypertension, diabetes mellitus and family history of CAD in Group I patients. It was found that DM and family history of CAD and history of stroke/TIA were significantly higher in Group I than Group II. An increasing trend of SYNTAX score was observed according to the CHA₂DS₂-VASc-HSF score. SYNTAX score was significantly higher in CHA2DS2-VASc-HSF score ≥4 than CHA₂DS₂-VASc-HSF score <4 (26.3±6.3 vs. 12.1±7.7, p<0.001). Patients with CHA₂DS₂-VASC-HSF score ≥4 had severe coronary artery disease than CHA₂DS₂-VASC-HSF score <4 assessed by SYNTAX score with 84.4% sensitivity and 81.9% specificity (AUC:0.83, 95% CI: 0.746-0.915, p<0.001). CHA₂DS₂-VASc-HSF score was positively correlated with the severity of CAD. This score could be considered as a predictor of coronary artery disease severity.
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Affiliation(s)
- M A Rahim
- Dr Mohammad Abdur Rahim, MD, Department of Cardiology, National Institute of Cardiovascular Diseases (NICVD), Dhaka, Bangladesh; E-mail:
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Pontarini E, Chowdhury F, Sciacca E, Grigoriadou S, Murray-Brown W, Rivellese F, Lucchesi D, Goldmann K, Fossati-Jimack L, Jaworska E, Ghirardi GM, Nerviani A, Emery P, Ng WF, Sutcliffe N, Tappuni A, Lewis M, Arends S, De Wolff L, Bootsma H, Pitzalis C, Bowman SJ, Bombardieri M. POS0145 CLINICAL RESPONSE TO RITUXIMAB IS ASSOCIATED WITH PREVENTION OF B-CELL DRIVEN SALIVARY GLAND INFLAMMATION AND EPITHELIAL RESTORATION AS REVEALED BY MOLECULAR PATHOLOGY: RESULTS FROM THE TRACTISS TRIAL IN PRIMARY SJOGREN’S SYNDROME. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundThe TRial for Anti-B-Cell Therapy In patients with pSS (TRACTISS) is the largest multi-centre, placebo-controlled, phase-III trial with the administration of 2 cycles of Rituximab (RTX) or placebo at week 0 and 24, with trial clinical endpoints at week 48. Despite the primary endpoints (30% reduction in fatigue or oral dryness) were not met, RTX treated patients showed an improvement in secondary endpoints, such as unstimulated whole salivary flow (UWSF), and salivary gland (SG) total ultrasound score1,2. Additionally, recent post-hoc analysis of TRACTISS using novel CRESS composite endpoints3, highlighted a significantly increased response rate in the RTX vs placebo arm.ObjectivesTo perform the first longitudinal analysis of matched transcriptomic and histological data of SG biopsies of pSS patients treated with RTX vs placebo at 3 time points, over 48 weeks, from the TRACTISS cohort, in order to identify mechanisms of response/resistance to B cell depletion.Methods29 pSS patients randomised to RTX or placebo arm consented for labial SG biopsies at week 0, 16 and 48. Patients received two 1000mg cycles of RTX or placebo at week 0 and 24. SG focus score, inflammatory aggregate area fraction, B-cells (CD20+), T-cells (CD3+), follicular dendritic cells (FDCs) (CD21+) and plasma cells (CD138+) density were assessed using quantitative digital image analysis. RNA sequencing with deconvolution and pathway analysis was performed to identify genes signatures and consensus gene modules as biomarkers of disease evolution and response/resistance to therapy.ResultsPlacebo-treated SGs showed worsening of SG inflammation highlighted by the increment of aggregate size, B-cell density, development of new FDC networks, and a higher ectopic GC prevalence over 48 weeks, compared to RTX-treated patients. No difference in focus score, total T-cell and plasma cell infiltration was observed. RTX downregulated genes involved in immune cell recruitment and inflammatory aggregate organisation (e.g. CXCL13, CCR7 and PDCD1). Gene signature-based analysis of 35 immune cell types using XCell highlighted how RTX blocked class-switched and memory-B-cells accumulation in SGs over 48 weeks. Pathway analyses confirmed the downregulation of leukocyte migration, MHC-II antigen presentation, and T-cell co-stimulation immunological pathways, such as the CD40 receptor complex pathway. Among RTX-treated patients, only CRESS-responders demonstrated prevention of worsening B cell-driven molecular pathology signatures over time and a significant improvement in UWSF, in parallel with the upregulation of molecular pathways associated to SG restoration of the glandular epithelium. None of the above effects were observed at week 16 after the first RTX cycle.ConclusionTwo RTX infusions repeated at week 24 exerted beneficial effects on labial SG inflammatory infiltration in pSS by downregulating genes involved in immune cell recruitment, activation and organisation in ectopic GCs. Conversely, all the above parameters showed significant evolution in placebo treated patients over 48 weeks demonstrating progression of SG immunopathology. Clinical responders to RTX based on CRESS response criteria were characterised by preservation of exocrine function which appear driven by SG epithelial restoration.References[1]Fisher, B. A. et al. Effect of rituximab on a salivary gland ultrasound score in primary Sjögren’s syndrome: results of the TRACTISS randomised double-blind multicentre substudy. Ann. Rheum. Dis.77, 412–416 (2018).[2]Bowman, S. J. et al. Randomized Controlled Trial of Rituximab and Cost-Effectiveness Analysis in Treating Fatigue and Oral Dryness in Primary Sjögren’s Syndrome. Arthritis Rheumatol.69, 1440–1450 (2017).[3]Arends, S. et al. Composite of Relevant Endpoints for Sjögren’s Syndrome (CRESS): development and validation of a novel outcome measure. Lancet Rheumatol.3, e553–e562 (2021).Disclosure of InterestsNone declared
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Berry I, Mangtani P, Rahman M, Greer A, Morris S, Anwar R, Lisa M, Shirin T, Islam M, Chowdhury F, Dunkle S, Brum E, Osmani M, Flora M, Fisman D. Seasonality of Human Influenza and Co-Seasonality with Avian Influenza in Bangladesh, 2010-2019. Int J Infect Dis 2022. [DOI: 10.1016/j.ijid.2021.12.211] [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
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Chowdhury F, Grigoriadou S, Bombardieri M. Severity of COVID-19 infection in primary Sjögren's syndrome and the emerging evidence of COVID-19-induced xerostomia. Clin Exp Rheumatol 2021; 39 Suppl 133:215-222. [PMID: 34919045 DOI: 10.55563/clinexprheumatol/k7x3ta] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 11/30/2021] [Indexed: 11/13/2022]
Abstract
Since the beginning of the COVID-19 disease pandemic caused by the new coronavirus SARS-CoV-2, the disease has claimed over 205M cases (205,338,159) and 4,333,094 deaths (WHO dashboard - accessed 15/08/2021). In addition to the overwhelming impact on healthcare systems treating acutely ill patients, the pandemic has had an impact on all other aspects of health care delivery, including the management of chronic diseases, the risk that is posed in patients with chronic conditions and the risk of the infection itself in those with chronic conditions. Autoimmune rheumatic diseases (ARDs), including primary Sjögren's syndrome (pSS), characterised by immune dysregulation affecting several organs in variable severity, have been of particular interest given the accelerated phase of the immune response in the course of SARS-CoV-2 infection leading to the acute inflammatory response and respiratory distress syndrome or multi-organ failure. On the other hand, the effect of immunosuppressive drug therapies can represent a double edge sword on the course of the disease, either by increased susceptibility to and severity of the infection, or by preventing the accelerated inflammatory response induced by the infection. Additionally, the long-term impact of SARS-CoV-2 infection on the host immune system has led to the onset of novel complex clinical manifestations, comprised under the large umbrella of "long-COVID", which we are only starting to understand. In this review we focus on two interrelated aspects: i) the impact of COVID-19 on patients with pSS and ii) the emerging evidence of long-term xerostomia after SARS-CoV-2 infection.
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Affiliation(s)
- Farzana Chowdhury
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, and Department of Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Queen Mary University of London, UK
| | - Sofia Grigoriadou
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, and Department of Immunology, Royal London Hospital, Barts Health NHS Trust, London, UK
| | - Michele Bombardieri
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, UK.
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Pontarini E, Sciacca E, Grigoriadou S, Rivellese F, Lucchesi D, Fossati-Jimack L, Coleby R, Chowdhury F, Calcaterra F, Tappuni A, Lewis MJ, Fabris M, Quartuccio L, Bella SD, Bowman S, Pitzalis C, Mavilio D, De Vita S, Bombardieri M. NKp30 Receptor Upregulation in Salivary Glands of Sjögren's Syndrome Characterizes Ectopic Lymphoid Structures and Is Restricted by Rituximab Treatment. Front Immunol 2021; 12:706737. [PMID: 34594326 PMCID: PMC8477027 DOI: 10.3389/fimmu.2021.706737] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/23/2021] [Indexed: 12/15/2022] Open
Abstract
Primary Sjögren's syndrome (pSS) is a chronic autoimmune disease resulting from the inflammatory infiltration of exocrine glands, mainly salivary and lacrimal glands, leading to secretory dysfunction and serious complications including debilitating fatigue, systemic autoimmunity, and lymphoma. Like other autoimmune disorders, a strong interferon (IFN) signature is present among subsets of pSS patients, suggesting the involvement of innate immunity in pSS pathogenesis. NCR3/NKp30 is a natural killer (NK) cell-specific activating receptor regulating the cross talk between NK and dendritic cells including type II IFN secretion upon NK-cell activation. A genetic association between single-nucleotide polymorphisms (SNPs) in the NCR3/NKp30 promoter gene and a higher susceptibility for pSS has been previously described, with pSS patients most frequently carrying the major allele variant associated with a higher NKp30 transcript and IFN-γ release as a consequence of the receptor engagement. In the present study, we combined RNA-sequencing and histology from pSS salivary gland biopsies to better characterize NKp30 (NCR3) and its ligand B7/H6 (NCR3LG1) in pSS salivary gland tissues. Levels of NCR3/NKp30 were significantly increased both in salivary glands and in circulating NK cells of pSS patients compared with sicca controls, especially in salivary glands with organized ectopic lymphoid structures. In line with this observation, a strong correlation between NCR3/NKp30 levels and salivary gland infiltrating immune cells (CD3, CD20) was found. Furthermore, NCR3/NKp30 levels also correlated with higher IFN-γ, Perforin, and Granzyme-B expression in pSS SGs with organized ectopic lymphoid structures, suggesting an activation state of NK cells infiltrating SG tissue. Of note, NKp30+ NK cells accumulated at the border of the inflammatory foci, while the NKp30 ligand, B7/H6, is shown to be expressed mainly by ductal epithelial cells in pSS salivary glands. Finally, immunomodulatory treatment, such as the B-cell depleting agent rituximab, known to reduce the infiltration of immune cells in pSS SGs, prevented the upregulation of NCR3/NKp30 within the glands.
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Affiliation(s)
- Elena Pontarini
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Elisabetta Sciacca
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Sofia Grigoriadou
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Felice Rivellese
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Davide Lucchesi
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Liliane Fossati-Jimack
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Rachel Coleby
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Farzana Chowdhury
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
- Institute of Dentistry, Barts and the London School of Medicine and Dentistry, London, United Kingdom
| | - Francesca Calcaterra
- Laboratory of Clinical and Experimental Immunology, Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Rozzano, Italy
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, Milan, Italy
| | - Anwar Tappuni
- Institute of Dentistry, Barts and the London School of Medicine and Dentistry, London, United Kingdom
| | - Myles J. Lewis
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Martina Fabris
- Istituto Di Patologia Clinica, Azienda Sanitaria Universitaria Integrata di Udine (ASUID), Udine, Italy
| | - Luca Quartuccio
- Clinic of Rheumatology, Department of Medicine (DAME), University of Udine, School of Rheumatology, Academic Hospital “Santa Maria della Misericordia”, Udine, Italy
| | - Silvia Della Bella
- Laboratory of Clinical and Experimental Immunology, Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Rozzano, Italy
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, Milan, Italy
| | - Simon Bowman
- National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre, University Hospitals Birmingham National Health System (NHS) Foundation Trust, Birmingham, United Kingdom
| | - Costantino Pitzalis
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
| | - Domenico Mavilio
- Laboratory of Clinical and Experimental Immunology, Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Rozzano, Italy
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, Milan, Italy
| | - Salvatore De Vita
- Clinic of Rheumatology, Department of Medicine (DAME), University of Udine, School of Rheumatology, Academic Hospital “Santa Maria della Misericordia”, Udine, Italy
| | - Michele Bombardieri
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
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Chowdhury F, Ray M, Sowinski A, Mehrani P, Passalacqua A. A review on modeling approaches for the electrostatic charging of particles. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.05.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chowdhury F, Tappuni A, Bombardieri M. Biological Therapy in Primary Sjögren's Syndrome: Effect on Salivary Gland Function and Inflammation. Front Med (Lausanne) 2021; 8:707104. [PMID: 34336905 PMCID: PMC8319401 DOI: 10.3389/fmed.2021.707104] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 06/07/2021] [Indexed: 12/26/2022] Open
Abstract
Primary Sjögren's syndrome (pSS) is a chronic, systemic autoimmune disease. It is the second most common rheumatic autoimmune disorder, affecting 0.7% of European Americans and up to 1% of people globally. pSS is characterized by the impaired secretory function of exocrine glands, including salivary and lachrymal glands. A lymphocytic infiltration of these organs leads to the common and debilitating symptoms of oral and ocular dryness, majorly affecting the quality of life of these patients. Currently, no disease-modifying drug has been approved for the treatment of pSS, with therapies largely aimed at relieving symptoms of dry mouth and dry eyes. In particular, management of oral dryness still represents a major unmet clinical need in pSS and a significant burden for patients with this condition. Recently, several randomized clinical trials in pSS with biological therapies targeting specific mechanistic pathways implicated in the disease pathogenesis, including B-cell hyperactivity, T-cell co-stimulation and the aberrant role of cytokines, have been completed with mixed results. In this review, we summarize evidence from recent clinical trials investigating biological therapy in pSS, specifically highlighting efficacy, or lack thereof, in modulating local inflammation and improving salivary gland function.
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Affiliation(s)
- Farzana Chowdhury
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom.,Institute of Dentistry, Barts and the London School of Medicine and Dentistry, London, United Kingdom
| | - Anwar Tappuni
- Institute of Dentistry, Barts and the London School of Medicine and Dentistry, London, United Kingdom
| | - Michele Bombardieri
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, London, United Kingdom
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Pontarini E, Chowdhury F, Sciacca E, Grigoriadou S, Rivellese F, Lucchesi D, Goldmann K, Fossati-Jimack L, Emery P, Ng WF, Sutcliffe N, Everett C, Fernandez C, Tappuni A, Lewis M, Pitzalis C, Bowman SJ, Bombardieri M. OP0136 RITUXIMAB PREVENTS THE PROGRESSION OF B-CELL DRIVEN INFLAMMATORY INFILTRATE IN THE MINOR SALIVARY GLANDS OF PRIMARY SJOGREN’S SYNDROME BY DOWNREGULATING IMMUNOLOGICAL PATHWAYS KEY IN ECTOPIC GERMINAL CENTRE ORGANIZATION: RESULTS FROM THE TRACTISS TRIAL. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.3960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:The pathogenic role of B-cells in primary Sjögren’s Syndrome (pSS) is well established and B cell abnormalities. Because of the substantial role of B-cells, rituximab (RTX), a chimeric anti-CD20 monoclonal antibody, has been considered as a potential biologic disease modifying drug to reduce disease activity in pSS. To date, the TRial for Anti-B-Cell Therapy In patients with pSS (TRACTISS) is the largest multi-centre, placebo-controlled trial with RTX. Despite the unmet primary endpoints (30% reduction in fatigue or oral dryness, measured by visual analogue scale), RTX treated patients showed an improvement in unstimulated whole salivary flow (Bowman et al. Arthritis Rheumatol 2017;69:1440–1450).Objectives:To provide the first longitudinal transcriptomic and histological analysis at 3 time points over 48 weeks of labial SGs of pSS patients treated with RTX, in comparison to placebo, from the TRACTISS cohort.Methods:26 pSS patients randomised to RTX or placebo arm consented for labial SG biopsies at baseline, weeks 16 and 48. Patients received two 1000mg cycles of RTX or placebo at baseline and week 24. SG focus score, inflammatory aggregate area fraction, B-cells (CD20+), T-cells (CD3+), follicular dendritic cells (FDCs) (CD21+) and plasma cells (CD138+) density were assessed by H&E and immunofluorescence staining. The histological analysis was performed by digital imaging using QuPath software. RNA was extracted from matched labial SG lobules and sequenced with Illumina platform. A Principal Component Analysis (PCA) and features driving the PCA were investigated along with the most influential gene loadings. The limma-voom R pipeline was used to extract Differential Expressed Genes (DEGs) between placebo and RTX group at week 48, and gene ontology (GO) enrichment analysis performed through EnrichR to derive GO terms and pathways associated with DEGs.Results:Placebo-treated labial SGs showed a worsening of inflammation highlighted by the increment of B-cell density, development of new FDC networks, and a higher ectopic GC prevalence at week 48, compared to RTX-treated patients. No difference in total T-cells and plasma cell infiltration was observed. RTX downregulated genes involved in immune cell recruitment and inflammatory aggregate organisation (e.g. CCR7, CCL19, CD52, and PDCD1) and gene signature-based analysis of 64 immune cell types highlighted how RTX preferentially blocked class-switched- and memory-B-cells infiltration in SGs at week 48. Pathway analyses confirmed the downregulation of leukocyte migration, MHC class II antigen presentation, and T-cell co-stimulation immunological pathways, such as the CD40 receptor complex pathway. The analysis of placebo SGs transcriptomic at week 48 showed a higher expression of genes linked to ectopic GC organisation, such as CXCL13, CCL19, LTβ, in female compared to male subjects. Gender was confirmed as a key co-variate responsible for most of the variation in the PCA, together with the SG focus score and the foci area fraction.Conclusion:Treatment with RTX showed beneficial effects on labial SG inflammatory infiltration in pSS, by downregulating genes involved in immune cell recruitment, activation and organisation in ectopic GCs. Class-switched-B-cells, memory-B-cells and FDC network development were primarily affected appearing to be responsible for the lack of progression in SG B cell infiltration in the RTX compared to the placebo arm in which clear worsening of SG immunopathology over 48 weeks was detected in female patients. Although a clear association with the clinical improvement in unstimulated salivary flow observed at week 48 in RTX-treated patients could not be established given the low number of patients consenting to 3 longitudinal biopsies it is conceivable that RTX is responsible for preserving exocrine function.Acknowledgements:SJB receives a salary contribution from the NIHR Birmingham Biomedical Research Centre.Disclosure of Interests:Elena Pontarini: None declared, Farzana Chowdhury: None declared, Elisabetta Sciacca: None declared, Sofia Grigoriadou: None declared, Felice Rivellese: None declared, Davide Lucchesi: None declared, Katriona Goldmann: None declared, Liliane Fossati-Jimack: None declared, Paul Emery: None declared, Wan Fai Ng: None declared, Nurhan Sutcliffe: None declared, Colin Everett: None declared, Catherine Fernandez: None declared, Anwar Tappuni: None declared, Myles Lewis: None declared, Costantino Pitzalis: None declared, Simon J. Bowman Consultant of: SJB In 2020 I have received consultancy fees from Novartis, Abbvie and Galapagos., Michele Bombardieri: None declared
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Shah V, Sherborne AL, Johnson DC, Ellis S, Price A, Chowdhury F, Kendall J, Jenner MW, Drayson MT, Owen RG, Gregory WM, Morgan GJ, Davies FE, Cook G, Cairns DA, Houlston RS, Jackson G, Kaiser MF. Predicting ultrahigh risk multiple myeloma by molecular profiling: an analysis of newly diagnosed transplant eligible myeloma XI trial patients. Leukemia 2020; 34:3091-3096. [PMID: 32157174 PMCID: PMC7584474 DOI: 10.1038/s41375-020-0750-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 02/04/2020] [Accepted: 02/06/2020] [Indexed: 11/17/2022]
Affiliation(s)
- Vallari Shah
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
| | - Amy L Sherborne
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
| | - David C Johnson
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
| | - Sidra Ellis
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
| | - Amy Price
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
| | - Farzana Chowdhury
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
| | - Jack Kendall
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
| | - Matthew W Jenner
- Department of Haematology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Mark T Drayson
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
| | - Roger G Owen
- Haematological Malignancy Diagnostic Service, St. James's University Hospital, Leeds, UK
| | - Walter M Gregory
- Clinical Trials Research Unit, Leeds Institute of Clinical Trials Research, Leeds, UK
| | - Gareth J Morgan
- Perlmutter Cancer Center, NYU Langone Health, New York, NY, USA
| | - Faith E Davies
- Perlmutter Cancer Center, NYU Langone Health, New York, NY, USA
| | - Gordon Cook
- Leeds Institute of Cancer and Pathology, University of Leeds, Leeds, UK
| | - David A Cairns
- Clinical Trials Research Unit, Leeds Institute of Clinical Trials Research, Leeds, UK
| | - Richard S Houlston
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
- Molecular and Population Genetics, The Institute of Cancer Research, London, UK
| | - Graham Jackson
- Department of Haematology, University of Newcastle, Newcastle Upon Tyne, UK
| | - Martin F Kaiser
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK.
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Chowdhury F, Elchamaa B, Ray M, Sowinski A, Passalacqua A, Mehrani P. Apparatus design for measuring electrostatic charge transfer due to particle-particle collisions. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.11.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Pradhan B, Das S, Li J, Chowdhury F, Cherusseri J, Pandey D, Dev D, Krishnaprasad A, Barrios E, Towers A, Gesquiere A, Tetard L, Roy T, Thomas J. Ultrasensitive and ultrathin phototransistors and photonic synapses using perovskite quantum dots grown from graphene lattice. Sci Adv 2020; 6:eaay5225. [PMID: 32095529 PMCID: PMC7015692 DOI: 10.1126/sciadv.aay5225] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/25/2019] [Indexed: 05/22/2023]
Abstract
Organic-inorganic halide perovskite quantum dots (PQDs) constitute an attractive class of materials for many optoelectronic applications. However, their charge transport properties are inferior to materials like graphene. On the other hand, the charge generation efficiency of graphene is too low to be used in many optoelectronic applications. Here, we demonstrate the development of ultrathin phototransistors and photonic synapses using a graphene-PQD (G-PQD) superstructure prepared by growing PQDs directly from a graphene lattice. We show that the G-PQDs superstructure synchronizes efficient charge generation and transport on a single platform. G-PQD phototransistors exhibit excellent responsivity of 1.4 × 108 AW-1 and specific detectivity of 4.72 × 1015 Jones at 430 nm. Moreover, the light-assisted memory effect of these superstructures enables photonic synaptic behavior, where neuromorphic computing is demonstrated by facial recognition with the assistance of machine learning. We anticipate that the G-PQD superstructures will bolster new directions in the development of highly efficient optoelectronic devices.
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Affiliation(s)
- Basudev Pradhan
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
| | - Sonali Das
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
| | - Jinxin Li
- CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
| | - Farzana Chowdhury
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
| | - Jayesh Cherusseri
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
| | - Deepak Pandey
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Durjoy Dev
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- Department of Physics, University of Central Florida, Orlando, FL 32816, USA
| | - Adithi Krishnaprasad
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- Department of Physics, University of Central Florida, Orlando, FL 32816, USA
| | - Elizabeth Barrios
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Andrew Towers
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA
| | - Andre Gesquiere
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA
| | - Laurene Tetard
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
- Department of Physics, University of Central Florida, Orlando, FL 32816, USA
| | - Tania Roy
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
- Corresponding author. (J.T.); (T.R.)
| | - Jayan Thomas
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
- Corresponding author. (J.T.); (T.R.)
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Rima FA, Hussain M, Dewan RK, Haque MN, Sultana T, Chowdhury F, Aminullah M, Ferdous JN. Clinicopathologic Features of Gastric and Gastrooesophageal Junction Adenocarcinoma. Mymensingh Med J 2020; 29:195-201. [PMID: 31915358] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Gastric cancer (GC) is one of the most common tumors and remains the second leading cause of cancer mortality in the world. The incidence of gastric carcinoma is declining in the last few years in some areas like USA, UK, Canada etc, because of reduction in chronic H. pylori infection, smoking, decrease use of smoked and salted food. The gastric carcinoma still remains a burden for Bangladesh as the prevalence of H. Pylori has not substantially decreases. Among the gastric carcinomas, adenocarcinomas are the most common type. So the study was performed to observe the location and histomorphologic pattern of Gastric and gastrooesophageal junction (GEJ) adenocarcinoma. This descriptive cross sectional study was carried out at the Department of Pathology, Dhaka Medical College, Dhaka, Bangladesh from January 2013 to December 2014. A total of 130 patients with primary gastric and GEJ adenocarcinomas were included in this study. All the cases were evaluated for routine histological examination. The age range of the patients was 17 to 80 years and male to female ratio was 2.25:1. Antrum is the most common (66.9%) site being affected, followed by GEJ (19.2%), body (13%) and fundus (0.76%). Tumors of the antrum and GEJ were found mostly in the late age. On macroscopic examination, the ulcerated tumor mass (69.2%) was most frequent then the others. Regarding histological examination, 84(64.6%) cases were intestinal type, 32(24.6%) diffuse and 14(10.8%) mixed type by Laurens classification. According to WHO classification, about half of the cases (49.2%) were tubular carcinoma and rest were others. Most of the intestinal type carcinoma (71.4%) was presented with moderately differentiated and 25.0% with well differentiated. Where as the diffuse type presented with poorly differentiated in 96.9% cases.
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Affiliation(s)
- F A Rima
- Dr Fahmida Akter Rima, Lecturer, Department of Pathology, Dhaka Medical College (DMC), Dhaka, Bangladesh
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Chowdhury Q, Begum F, Rahman M, Chowdhury F, Kabir S, Husain Z. EP1.03-34 Single Center Epidemiological Prevalence Study of Molecular Mutation in Bangladeshi Patients with Advanced Stage Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Grigoriadou S, Chowdhury F, Pontarini E, Tappuni A, Bowman SJ, Bombardieri M. B cell depletion with rituximab in the treatment of primary Sjögren's syndrome: what have we learnt? Clin Exp Rheumatol 2019; 37 Suppl 118:217-224. [PMID: 31464681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 07/11/2019] [Indexed: 03/16/2023]
Abstract
Despite the well-established role of B cells in the pathogenesis of primary Sjögren's syndrome (pSS), the beneficial role of B-cell depletion therapy with rituximab remains elusive in this condition, contrary to other autoimmune diseases. Although early, small-scale studies showed promising results, two recent large randomised controlled trials did not meet their primary end-points. It is evident from most trials that rituximab has a positive impact on B-cell numbers and activity, both in the peripheral blood and in salivary glands, but clinical outcomes vary among studies. We review here the evidence to date of B-cell depletion in pSS, analysing the underlying causes for the discrepancies in different studies and their limitations. We also discuss the potential use of peripheral and salivary gland biomarkers for patient stratification and targeted patient selection. Overall, rituximab remains a plausible treatment for pSS provided future studies address the shortfalls that emerged from our current knowledge of the use of B-cell depletion in this condition.
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Affiliation(s)
- Sofia Grigoriadou
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, UK
| | - Farzana Chowdhury
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, and Department of Oral Medicine, Institute of Dentistry, Bart's and The London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - Elena Pontarini
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, UK
| | - Anwar Tappuni
- Department of Oral Medicine, Institute of Dentistry, Bart's and The London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - Simon J Bowman
- Rheumatology Research Group, Institute of Inflammation and Ageing, University of Birmingham, and Rheumatology Department, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Michele Bombardieri
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, UK.
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Della Costanza M, Vakharia VN, Li K, Mancini M, Vos SB, Diehl B, Winston J, McEvoy AW, Miserocchi A, Scerrati M, Chowdhury F, Sparks R, Ourselin S, Duncan JS. TP3-5 Structural connectivity driven stereoelectroencephalography (SEEG) electrode targeting in suspected pseudotemporal and temporal plus epilepsy. J Neurol Neurosurg Psychiatry 2019. [DOI: 10.1136/jnnp-2019-abn.60] [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] [Indexed: 11/04/2022]
Abstract
ObjectivesOne third of patients with drug resistant focal mesial temporal lobe epilepsy (MTLE) fail to achieve long-term seizure freedom following temporal lobe resections. Reasons for failure may include ictal onset outside the temporal lobe (TL), termed ‘pseudotemporal lobe epilepsy’ (pTLE), with propagation from strongly connected neighboring areas or temporal plus (TL+) epilepsy, when the epileptogenic zone primarily involves the temporal lobe and also extends to neighboring regions. In such cases the perisylvian and orbito-frontal (OF) cortices, cingulum and temporo-parieto-occipital junction may be implicated. Stereoelectroencephalography (SEEG) is a procedure in which electrodes are stereotactically placed within predefined brain regions to delineate the SOZ and allows evaluation of deep anatomical structures adjacent to the TL. SEEG electrode contacts sample from a core radius of 3–5 mm. It is unclear which sub-regions of target structures should be preferentially implanted to optimally detect the network involved in seizure onset and rapid propagation. Using normalized average group templates of structural connectivity from patients with hippocampal sclerosis (HS), we determine the greatest connectivity to critical sub-regions and based upon this propose optimal locations for SEEG targeting.DesignObservational cross-sectional study.SubjectsTwelve patients with HS (6 right) that had undergone SEEG and pre-operative diffusion imaging were identified from a prospectively maintained database.MethodsWhole brain connectomes with 10 million tracts were generated using cortical seed regions derived from whole brain GIF parcellations. Normalized group templates were generated separately for right and left HS patients. Orbitofrontal cortex (OF), insula (INS), cingulum (Cing) and temporo-parietal-occipital junction (supramarginal gyrus, angular gyrus, precuneus, fusiform gyrus and lingual gyrus) were segmented into surgically targetable subregions. All subregions had similar volumes. Connectivity of the amygdalohippocampal complex (AHC) was defined based on the number of streamlines terminating in the subregions of interest.ResultsLeft HS showed preferential connections to the ipsilateral: posterior part of lateral OF cortex, posterior short gyrus of anterior INS, posterior part of the posterior Cing, middle part of lingual gyrus, posterior part of precuneus and middle part of fusiform gyrus. Right HS showed preferential connections to the ipsilateral: posterior part of the lateral OF cortex, anterior long gyrus of posterior INS, posterior part of posterior Cing, anterior part of lingual gyrus and posterior part of precuneus.ConclusionsUsing whole brain connectomes we determine surgically feasible targets in sub-regions based on greatest connectivity to the AHC. We propose that SEEG targeting utilizing computer-assisted planning may improve the understanding of the overall network connectivity in order to enhance the diagnostic utility of the SEEG implantation. SEEG electrode placement within structures associated with pTLE and TL +may aid in delineating the SOZ if the correct sub-regions are targeted. This should be evaluated prospectively.
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Talukder MI, Khan MH, Chowdhury F, Ansary AA, Rahman K, Islam N. Evaluation of Preoperative Ultrasonography in Gall Stone Disease to Predict Technical Difficulties during Laparoscopic Cholecystectomy. Mymensingh Med J 2018; 27:757-763. [PMID: 30487491] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Laparoscopic cholecystectomy is the gold standard in the treatment of gallstones. This study was carried out to determine the technical difficulties that can be encountered during laparoscopic cholecystectomy and to evaluate the role of ultrasonography in identifying patients at risk of conversion returning to open surgery. The objective of this study was to evaluate the efficacy of preoperative ultrasonography in assessing technical difficulty faced during laparoscopic cholecystectomy in gallstone disease. This was an observational comparative study which was conducted in the Department of Surgery of Shaheed Suhrawardy Medical College & Hospital, Dhaka, Bangladesh from January 2016 to January 2017. A purposive sampling method was applied to select the study sample. A total of 160 patients were included this study. Data processing and analysis were done using SPSS (statistical package for social sciences), version 20. The summarized data were presented in the form of figures and tables with due statistical interpretation. In this study, there was a total of 160 cases, among which 90(56.25%) turned out to have undergone normal laparoscopic cholecystectomies. Seventy (43.75%) were difficult, among which 6(3.75%) were converted to open cholecystectomies. Among 160 patients, 120(75%) were female and 40(25%) were male. There is a total of 136/160 (85%) patients with gallbladder wall thickness <3mm and 24/160 (15%) patients >3mm. Among the 136 patients with gallbladder wall thickness <3mm, there was difficulty in holding the gallbladder in 28(25%) cases, 28(20.6%) had undergone gallbladder perforation, 32(23.5%) had undergone moderate bleeding and only 2(1.5%) had undergone severe bleeding. Among the 24 patients with gallbladder wall thickness >3mm, there was difficulty in holding the gallbladder in 22(91.7%) cases, 18(75%) had undergone gallbladder perforation, 18(75%) had undergone moderate bleeding and only 2(8.33%) had undergone severe bleeding. It shows a total of 124/160 (77.5%) patients with normal gall bladder, 26/160 (16.25%) patients with contracted gallbladder and 10/160 (6.25%) patients with distended gallbladder. Among the 124 patients with normal gallbladder, 16(12.9%) had undergone difficult Calot's dissection, 26(21%) had undergone difficult gallbladder bed dissection, 26(21%) had undergone moderate bleeding and none had undergone severe bleeding. Among 26 patients with contracted gallbladder, 20(76.9%) underwent difficult Calot's dissection, 24(92.3%) had undergone difficult gallbladder bed dissection, 18(69.2%) had undergone moderate bleeding and 4(15.4%) had undergone severe bleeding. Among 10 patients with distended gallbladder, 4(40%) underwent difficult Calot's dissection, 6(60%) underwent difficult gallbladder bed dissection, 6(60%) had undergone moderate bleeding and none had undergone severe bleeding. From this study, we conclude that preoperative ultrasonography is a good predictor of difficulty in laparoscopic cholecystectomy in the majority of cases and should be used as a screening procedure.
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Affiliation(s)
- M I Talukder
- Dr Md Monoarul Islam Talukdar, Resident Surgeon (Surgery), Shaheed Suhrawardy Medical College Hospital, Dhaka, Bangladesh; E-mail:
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Chowdhury F, Davidova A, Davies P, Sripada S. Consenting for acute orthopaedic trauma admissions; Assessing current practice. Int J Surg 2018. [DOI: 10.1016/j.ijsu.2018.05.402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Davidova A, Chowdhury F, Davies P, Sripada S. What constitutes a “material risk” when consenting in acute orthopaedic trauma admissions? Int J Surg 2018. [DOI: 10.1016/j.ijsu.2018.05.406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Rima FA, Hussain M, Awal N, Aminullah M, Chowdhury F, Khan ZB. Steatocystoma Simplex on the Scalp: A Case Report. Mymensingh Med J 2018; 27:669-671. [PMID: 30141463] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Steatocystoma is a benign adnexal tumor arising from the pilosebaceous duct junction. It can be classified into two groups (steatocystoma simplex and steatocystoma multiplex). Steatocystoma simplex, which presents as a solitary, non-herited very rare lesion in adult. It occurs most commonly in the axillae, in the sternal region and on the arms. Scalp is an extremely rare location. We report a case of 49-years-old male admitted in Department of Surgery, Dhaka Medical College & Hospital, Dhaka, Bangladesh on February 2017 presented with slowly progressing painless, soft, yellowish, single smooth surface mass on the left parietal scalp which had persisted for a period of 8 years. The histopathologic examination revealed a thin-walled cyst consisting of stratified squamous epithelium with lack of granular layer and containing sebaceous gland close to the wall. These findings were consistent with steatocystoma. At the 4-month follow-up, there was no sign of recurrence or development of the steatocystoma or any other masses.
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Affiliation(s)
- F A Rima
- Dr Fahmida Akter Rima, Lecturer, Department of Pathology, Dhaka Medical College, Dhaka, Bangladesh
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Nguyen QT, Norelli JB, Graver A, Ekstein C, Schwartz J, Chowdhury F, Drakos MC, Grande DA, Chahine NO. Therapeutic Effects of Doxycycline on the Quality of Repaired and Unrepaired Achilles Tendons. Am J Sports Med 2017; 45:2872-2881. [PMID: 28759732 DOI: 10.1177/0363546517716637] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 01/31/2023]
Abstract
BACKGROUND Achilles tendon tears are devastating injuries, especially to athletes. Elevated matrix metalloproteinase (MMP) activity after a tendon injury has been associated with deterioration of the collagen network and can be inhibited with doxycycline (Doxy). HYPOTHESIS Daily oral administration of Doxy will enhance the histological, molecular, and biomechanical quality of transected Achilles tendons. Additionally, suture repair will further enhance the quality of repaired tendons. STUDY DESIGN Controlled laboratory study. METHODS Randomized unilateral Achilles tendon transection was performed in 288 adult male Sprague-Dawley rats. The injured tendons were either unrepaired (groups 1 and 2) or surgically repaired (groups 3 and 4). Animals from groups 2 and 4 received Doxy daily through oral gavage, and animals from groups 1 and 3 served as controls (no Doxy). Tendons were harvested at 1.5, 3, 6, and 9 weeks after the injury (n = 18 per group and time point). The quality of tendon repair was evaluated based on the histological grading score, collagen fiber orientation, gene expression, and biomechanical properties. RESULTS In surgically repaired samples, Doxy enhanced the quality of tendon repair compared with no Doxy ( P = .0014). Doxy had a significant effect on collagen fiber dispersion, but not principal fiber angle. There was a significant effect of time on the gene expression of MMP-3, MMP-9 and TIMP1, and Doxy significantly decreased MMP-3 expression at 9 weeks. Doxy treatment with surgical repair increased the dynamic modulus at 6 weeks but not at 9 weeks after the injury ( P < .001). Doxy also increased the equilibrium modulus and decreased creep strain irrespective of the repair group. Doxy did not have a significant effect on the histology or biomechanics of unrepaired tendons. CONCLUSION The findings indicate that daily oral administration of Doxy accelerated matrix remodeling and the dynamic and equilibrium biomechanics of surgically repaired Achilles tendons, although such enhancements were most evident at the 3- to 6-week time points. CLINICAL RELEVANCE The inhibition of MMPs at the optimal stage of the repair process may accelerate Achilles tendon repair and improve biomechanical properties, especially when paired with surgical management.
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Affiliation(s)
- Quynhhoa T Nguyen
- Bioengineering-Biomechanics Laboratory, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, New York, USA
| | - Jolanta B Norelli
- Orthopaedic Research Laboratory, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, New York, USA.,Hofstra Northwell School of Medicine, Hofstra University, Hempstead, New York, USA
| | - Adam Graver
- Department of Orthopaedic Surgery, Long Island Jewish Medical Center, New Hyde Park, New York, USA
| | - Charles Ekstein
- Department of Orthopaedic Surgery, Long Island Jewish Medical Center, New Hyde Park, New York, USA
| | - Johnathan Schwartz
- Orthopaedic Research Laboratory, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, New York, USA
| | - Farzana Chowdhury
- Bioengineering-Biomechanics Laboratory, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, New York, USA
| | - Mark C Drakos
- Department of Orthopaedic Surgery, Long Island Jewish Medical Center, New Hyde Park, New York, USA.,Hospital for Special Surgery, New York, New York, USA
| | - Daniel A Grande
- Orthopaedic Research Laboratory, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, New York, USA.,Hofstra Northwell School of Medicine, Hofstra University, Hempstead, New York, USA.,Department of Orthopaedic Surgery, Long Island Jewish Medical Center, New Hyde Park, New York, USA
| | - Nadeen O Chahine
- Bioengineering-Biomechanics Laboratory, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, New York, USA.,Hofstra Northwell School of Medicine, Hofstra University, Hempstead, New York, USA
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Begum A, Baten MA, Begum Z, Ahsan MM, Rahman SF, Chowdhury F, Khan AH. Role of Serum Pepsinogen I and II Ratio in Screening of Gastric Carcinoma. Mymensingh Med J 2017; 26:628-634. [PMID: 28919620] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In spite of the global decline in its incidence and mortality, gastric carcinoma still remains a major cause of death due to cancer. Early detection of gastric carcinoma is expected to reduce mortality rates. The applications of measuring of pepsinogen I and pepsinogen II are useful in screening of gastric carcinoma. This cross sectional comparative study was done to find out the correlation of histopathological pattern of gastric carcinoma with serum pepsinogen I & II ratio in the Department of Pathology, Sylhet MAG Osmani Medical College, Sylhet, Bangladesh from January 2010 to December 2010. For these purpose 40 patients with gastric carcinoma, endoscopically visible and histopathologically proved malignant lesions were enrolled as case group. Forty subjects with normal upper GI endoscopy were taken as control. Five ml of venous blood was taken from both case and control subjects to determine serum pepsinogen I and pepsinogen II level by ELISA method, subsequently pepsinogen I and II ratio was calculated. In this study different cut off values of serum pepsinogen I and II ratio was determined and the sensitivity, specificity, positive predictive value, negative predictive value and accuracy were 70.0%, 97.5% 96.6% 76.5% and 83.8% respectively, at cut off value of 6. Which is the most suitable cut off point of serum pepsinogen I and II ratio for gastric cancer screening.
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Affiliation(s)
- A Begum
- Dr Ambia Begum, Assistant Professor, Department of Pathology, Community Based Medical College Bangladesh (CBMCB), Mymensingh, Bangladesh
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Rima FA, Hussain M, Haque N, Dewan RK, Rahman N, Jinnah MA, Jeba R, Chowdhury F. HER2 status in Gastric and Gastroesophageal Junction Adenocarcinoma. Mymensingh Med J 2017; 26:372-379. [PMID: 28588175] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Gastric carcinoma is a biologically heterogenous disease and survival varies among the patients with same stage. Recent studies have shown that a subset of gastric and gastroesophageal junction adenocarcinoma over express the HER2/neu protein and these patients can be treated by monoclonal antibody against HER2/neu protein. The purpose of this study was to detect the frequency of HER2 expression in gastric and gastroesophageal junction adenocarcinoma and to evaluate the relationship between HER2 expression and clinicopathological features in these patients. This descriptive cross sectional study was carried out at the Department of Pathology, Dhaka Medical College, from January 2013 to December 2014. A total of 130 patients with primary gastric and gastroesophageal junction adenocarcinomas were included in this study. All the cases were evaluated for routine histological examination and immunohistochemical examination was done for HER2/neu protein. Among the 130 cases, HER2 over expression was found in 12.3% cases and was more frequent in gastroesophageal junction (28%) than in gastric carcinoma (8.6%) (P=0.026). HER2 positivity was found significantly more in intestinal type carcinoma (19%), papillary carcinoma (63%) and in fungating growth pattern (P=0.003, 0.001 and 0.001 respectively). HER2 expression was also positive in grade-I or grade-II tumor but negative in grade-III tumor (P=0.001). No significant association of HER2 expression was found with age, sex, lymph node metastasis and extent of tumor. In conclusion it can be stated that gastric and gastroesophageal junction adenocarcinoma of intestinal type or papillary and tubular type with well to moderate differentiation can be targeted for therapy using Herceptin.
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Affiliation(s)
- F A Rima
- Dr Fahmida Akter Rima, Lecturer, Department of Pathology, Dhaka Medical College (DMC), Dhaka, Bangladesh
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26
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Maidhof R, Rafiuddin A, Chowdhury F, Jacobsen T, Chahine NO. Timing of mesenchymal stem cell delivery impacts the fate and therapeutic potential in intervertebral disc repair. J Orthop Res 2017; 35:32-40. [PMID: 27334230 DOI: 10.1002/jor.23350] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 06/21/2016] [Indexed: 02/04/2023]
Abstract
Cell-based therapies offer a promising approach to treat intervertebral disc (IVD) degeneration. The impact of the injury microenvironment on treatment efficacy has not been established. This study used a rat disc stab injury model with administration of mesenchymal stromal cells (MSCs) at 3, 14, or 30 days post injury (DPI) to evaluate the impact of interventional timing on IVD biochemistry and biomechanics. We also evaluated cellular localization within the disc with near infrared imaging to track the time and spatial profile of cellular migration after in vivo delivery. Results showed that upon injection into a healthy disc, MSCs began to gradually migrate outwards over the course of 14 days, as indicated by decreased signal intensity from the disc space and increased signal within the adjacent vertebrae. Cells administered 14 or 30 DPI also tended to migrate out 14 days after injection but cells injected 3 DPI were retained at a significantly higher amount versus the other groups (p < 0.05). Correspondingly the 3 DPI group, but not 14 or 30 DPI groups, had a higher GAG content in the MSC injected discs (p = 0.06). Enrichment of MSCs and increased GAG content in 3 DPI group did not lead to increased compressive biomechanical properties. Findings suggest that cell therapies administered at an early stage of injury/disease progression may have greater chances of mitigating matrix loss, possibly through promotion of MSC activity by the inflammatory microenvironment associated with injury. Future studies will evaluate the mode and driving factors that regulate cellular migration out of the disc. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:32-40, 2017.
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Affiliation(s)
- Robert Maidhof
- Biomechanics and Bioengineering Research Lab, Feinstein Institute for Medical Research, Northwell Health, 350 Community Drive, Manhasset, New York, 11030
| | - Asfi Rafiuddin
- Biomechanics and Bioengineering Research Lab, Feinstein Institute for Medical Research, Northwell Health, 350 Community Drive, Manhasset, New York, 11030
| | - Farzana Chowdhury
- Biomechanics and Bioengineering Research Lab, Feinstein Institute for Medical Research, Northwell Health, 350 Community Drive, Manhasset, New York, 11030
| | - Timothy Jacobsen
- Biomechanics and Bioengineering Research Lab, Feinstein Institute for Medical Research, Northwell Health, 350 Community Drive, Manhasset, New York, 11030
| | - Nadeen O Chahine
- Biomechanics and Bioengineering Research Lab, Feinstein Institute for Medical Research, Northwell Health, 350 Community Drive, Manhasset, New York, 11030.,Departments of Molecular Medicine, Neurosurgery, and Orthopedic Surgery, Hofstra Northwell School of Medicine, Hempstead, New York
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27
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Ward G, Ramasamy S, Sykes JR, Prestwich R, Chowdhury F, Scarsbrook A, Murray P, Harris K, Crellin A, Hatfield P, Sebag-Montefiore D, Spezi E, Crosby T, Radhakrishna G. Superiority of Deformable Image Co-registration in the Integration of Diagnostic Positron Emission Tomography-Computed Tomography to the Radiotherapy Treatment Planning Pathway for Oesophageal Carcinoma. Clin Oncol (R Coll Radiol) 2016; 28:655-62. [PMID: 27266819 DOI: 10.1016/j.clon.2016.05.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 05/02/2016] [Accepted: 05/04/2016] [Indexed: 11/26/2022]
Abstract
AIMS To investigate the use of image co-registration in incorporating diagnostic positron emission tomography-computed tomography (PET-CT) directly into the radiotherapy treatment planning pathway, and to describe the pattern of local recurrence relative to the PET-avid volume. MATERIALS AND METHODS Fourteen patients were retrospectively identified, six of whom had local recurrence. The accuracy of deformable image registration (DIR) and rigid registration of the diagnostic PET-CT and recurrence CT, to the planning CT, were quantitatively assessed by comparing co-registration of oesophagus, trachea and aorta contours. DIR was used to examine the correlation between PET-avid volumes, dosimetry and site of recurrence. RESULTS Positional metrics including the dice similarity coefficient (DSC) and conformity index (CI), showed DIR to be superior to rigid registration in the co-registration of diagnostic and recurrence imaging to the planning CT. For diagnostic PET-CT, DIR was superior to rigid registration in the transfer of oesophagus (DSC=0.75 versus 0.65, P<0.009 and CI=0.59 versus 0.48, P<0.003), trachea (DSC=0.88 versus 0.65, P<0.004 and CI=0.78 versus 0.51, P<0.0001) and aorta structures (DSC=0.93 versus 0.86, P<0.006 and CI=0.86 versus 0.76, P<0.006). For recurrence imaging, DIR was superior to rigid registration in the transfer of trachea (DSC=0.91 versus 0.66, P<0.03 and CI=0.83 versus 0.51, P<0.02) and oesophagus structures (DSC=0.74 versus 0.51, P<0.004 and CI=0.61 versus 0.37, P<0.006) with a non-significant trend for the aorta (DSC=0.91 versus 0.75, P<0.08 and CI=0.83 versus 0.63, P<0.06) structure. A mean inclusivity index of 0.93 (range 0.79-1) showed that the relapse volume was within the planning target volume (PTVPET-CT); all relapses occurred within the high dose region. CONCLUSION DIR is superior to rigid registration in the co-registration of PET-CT and recurrence CT to the planning CT, and can be considered in the direct integration of PET-CT to the treatment planning process. Local recurrences occur within the PTVPET-CT, suggesting that this is a suitable target for dose-escalation strategies.
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Affiliation(s)
- G Ward
- Medical Physics and Engineering, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK.
| | - S Ramasamy
- Radiation Oncology, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - J R Sykes
- Radiation Oncology and Medical Physics, Blacktown Hospital, Blacktown, Australia
| | - R Prestwich
- Radiation Oncology, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - F Chowdhury
- Clinical Radiology and Nuclear Medicine, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - A Scarsbrook
- Clinical Radiology and Nuclear Medicine, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - P Murray
- Radiation Oncology, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - K Harris
- Radiation Oncology, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - A Crellin
- Radiation Oncology, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - P Hatfield
- Radiation Oncology, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - D Sebag-Montefiore
- Radiation Oncology, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - E Spezi
- Biomedical Engineering Research Group, School of Engineering, Cardiff University, Cardiff, UK
| | - T Crosby
- Velindre Cancer Centre, Velindre Hospital, Cardiff, UK
| | - G Radhakrishna
- Radiation Oncology, Leeds Cancer Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK
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Kawsar K, Haque M, Chowdhury F. Rhabdoid meningioma in the petroclival region: An atypical meningioma in an atypical site. Asian J Neurosurg 2015; 10:325-6. [PMID: 26425167 PMCID: PMC4558814 DOI: 10.4103/1793-5482.162720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- K Kawsar
- Department of Neurosurgery, Dhaka Medical College Hospital, Dhaka
| | - M Haque
- Department of Neurosurgery, Dhaka Medical College Hospital, Dhaka
| | - F Chowdhury
- Department of Neurosurgery, Dhaka Medical College Hospital, Dhaka
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Werner RA, Maya Y, Yamane T, Rischpler C, Fukushima K, Chen X, Lapa C, Herrmann K, Higuchi T, Thorn S, Stacy M, Purcell B, Doviak H, Shuman J, Perez E, Burdick J, Spinale F, Sinusas A, Treibel T, Bandula S, Fontana M, White S, Gilbertson J, Punwani S, Gillmore J, Hawkins P, Taylor S, Moon J, Caobelli F, Wollenweber T, Kuehn C, Bavendiek U, Schuetze C, Geworski L, Bauersachs J, Haverich A, Bengel F, Barysheva N, Merkulova I, Shabanova M, Gaman S, Veselova T, Shariya M, Kelion AD, Pakkal M, Chowdhury F, Nagaraj N, Birchall J, Dixon K, Banya W, Mccann G, Gershlick A, Rischpler C, Dirschinger R, Nicolosi S, Kossmann H, Meinicke A, Hanus F, Goetze K, Laugwitz K, Schwaiger M, Nekolla S, Rischpler C, Dirschinger R, Nicolosi S, Kossmann H, Meinicke A, Hanus F, Goetze K, Laugwitz K, Schwaiger M, Nekolla S. Moderated Poster Session 4: Monday 4 May 2015, 15:30-16:30 * Room: Moderated Poster Area. Eur Heart J Cardiovasc Imaging 2015. [DOI: 10.1093/ehjci/jev050] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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30
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Chowdhury F, Gulshan J, Hossain SS. A Comparison of Semi-Parametric and Nonparametric Methods for Estimating Mean Time to Event for Randomly Left Censored Data. J Mod App Stat Meth 2015. [DOI: 10.22237/jmasm/1430453760] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Farzana Chowdhury
- Department of Business Administration, Northern University Bangladesh
| | - Jahida Gulshan
- Institute of Statistical Research and Training, University of Dhaka
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Langford J, Chowdhury F, Orchard K. Development of an ELISA for the Pharmacokinetic Evaluation of a Murine Anti CD66 Monoclonal Antibody in Human Serum. J Immunoassay Immunochem 2015; 36:579-96. [PMID: 25715051 DOI: 10.1080/15321819.2015.1017107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
An enzyme-linked immunosorbent assay (ELISA) was needed to assist in the pharmacokinetic evaluation of the murine antibody conjugate CHX A" DTPA Besilesomab in serum samples in a clinical trial . A search failed to locate a validated assay that quantified murine antibodies in human serum so the purpose of this article was to develop a robust assay, validated against current guidelines. A detailed method for an ELISA to measure a murine antibody in human serum is described. The assay was validated as fit for purpose against the target values of coefficient of variation < 20% and accuracy ± 20%.
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Affiliation(s)
- J Langford
- a Cancer Sciences Unit, Faculty of Medicine , Southampton University , United Kingdom
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32
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Chowdhury F, Johnson PW, Glennie M, Williams AP. Ex vivo assays of dendritic cell activation and cytokine profiles as predictors of in vivo effects in an anti-human CD40 monoclonal antibody ChiLob 7/4 phase I trial. Cancer Immunol Res 2014; 2:229-40. [PMID: 24778319 PMCID: PMC4007630 DOI: 10.1158/2326-6066.cir-13-0070] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [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: 11/16/2022]
Abstract
Immunostimulatory antibodies entering the clinic create challenge in terms of not only pharmacodynamics for monitoring anticipated mechanisms but also predetermining cytotoxicity. We show the use of ex vivo whole-blood samples to predict the activation requirements, cytokine signature, and adverse events of an anti-human-CD40 chimeric IgG1 antibody, ChiLob 7/4. Assessments were initially undertaken on human myeloid (mDC1) and plasmacytoid (pDC) dendritic cells, in which an absolute need for cross-linking was shown through the upregulation of activation markers CD83 and CCR7. Subsequent cytokine secretion evaluations of ex vivo whole blood showed the cross-linked antibody-induced increases in MIP1β, interleukin (IL)-8, IL-12, TNFα, and IL-6. This cytokine signature compared favorably with the Toll-like receptor (TLR) ligand lipopolysaccharide (LPS), in which levels of TNFα and IL-6 were significantly higher, suggesting a less intense proinflammatory response and possible modified cytokine release syndrome when used in human trials. Following first-in-human use of this agent within a dose escalation study, in vivo evaluations of dendritic cell activation and secreted cytokines closely matched the predetermined immunomonitoring endpoints. Patients showed a comparable pattern of MIP1β, IL-8, and IL-12 secretion, but no TNFα and IL-6 were identified. Mild symptoms relating to a cytokine release syndrome were seen at an equivalent dosage to that observed for dendritic cell activation and cytokine release. In summary, ChiLob 7/4 induces a distinctive pattern of dendritic cell activation and cytokine secretion in ex vivo assays that can be predictive of in vivo responses. Such preclinical approaches to monoclonal antibody evaluation may inform both the starting dosages and the anticipated cytokine release events that could occur, providing a valuable adjunct for future first-in-human assessments of immunostimulatory antibodies.
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Affiliation(s)
- F. Chowdhury
- Academic Unit of Cancer Sciences Unit, Faculty of Medicine, CRUK Clinical Centre, Somers Cancer Research Building, University of Southampton, Southampton General Hospital, Tremona Road, Southampton, SO16 6YD, England
- Southampton NIHR Experimental Cancer Medicine Centre, Mailpoint 824, Southampton, SO16 6YD, England
| | - P. W. Johnson
- Academic Unit of Cancer Sciences Unit, Faculty of Medicine, CRUK Clinical Centre, Somers Cancer Research Building, University of Southampton, Southampton General Hospital, Tremona Road, Southampton, SO16 6YD, England
- Southampton NIHR Experimental Cancer Medicine Centre, Mailpoint 824, Southampton, SO16 6YD, England
| | - M.J. Glennie
- Academic Unit of Cancer Sciences Unit, Faculty of Medicine, CRUK Clinical Centre, Somers Cancer Research Building, University of Southampton, Southampton General Hospital, Tremona Road, Southampton, SO16 6YD, England
| | - A. P. Williams
- Academic Unit of Cancer Sciences Unit, Faculty of Medicine, CRUK Clinical Centre, Somers Cancer Research Building, University of Southampton, Southampton General Hospital, Tremona Road, Southampton, SO16 6YD, England
- Southampton NIHR Experimental Cancer Medicine Centre, Mailpoint 824, Southampton, SO16 6YD, England
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Al Mahtab M, Mohammad Fazle Akbar S, Chandra Podder D, Kumar Saha P, Jahan M, Begum L, Afrose T, Chowdhury F, Rahman S. An Outbreak of Acute Hepatitis in a Medical Facility of Bangladesh. Euroasian J Hepatogastroenterol 2014; 4:66-67. [PMID: 29264325 PMCID: PMC5736962 DOI: 10.5005/jp-journals-10018-1102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 02/18/2014] [Indexed: 11/23/2022] Open
Abstract
A total of 45 patients with acute hepatitis were detected in a medical facility of Bangladesh over a period of 6 months. All of them were physicians, nurses, students or employees of the hospital. About 50% of these patients suffered from acute hepatitis within a period of 2 months. All of them had clinical and biochemical evidences of acute hepatitis. All of them shared common working places as well as common dining and cooking facilities. Although the disease was supposed to be caused by hepatitis viruses, none of them were expressing IgM type antibody to hepatitis B core antigen (IgM anti-HBc) or hepatitis C virus (IgM anti-HCV). IgM type antibody to hepatitis A virus (IgM HAV) was detected in one patient and IgM type antibody to hepatitis E virus (anti-HEV IgM) were found in 14 patients. In conclusion, diagnosis of etiological agent of viral acute hepatitis constitutes a formidable challenge to the existing health care delivery system in developing countries as available serological and routine screening fails to find the proper etiological agent. How to cite this article: Mahtab MA, Akbar SMF, Podder DC, Saha PK, Jahan M, Begum L, Afrose T, Chowdhury F, Rahman S. An Outbreak of Acute Hepatitis in a Medical Facility of Bangladesh. Euroasian J Hepato-Gastroenterol 2014;4(1):66-67.
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Affiliation(s)
- Mamun Al Mahtab
- Department of Hepatology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
| | | | | | - Paban Kumar Saha
- Department of Medicine, Kumudini Women's Medical College and Hospital, Tangail, Bangladesh
| | - Munira Jahan
- Department of Virology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
| | - Lovely Begum
- Research Division, Catalysis South Asia Operations, Dhaka, Bangladesh
| | - Tanjina Afrose
- Department of Medicine, Kidney Foundation Hospital and Research Institute, Dhaka, Bangladesh
| | - Farzana Chowdhury
- Department of Anesthesiology, Ad-din Medical College and Hospital, Dhaka, Bangladesh
| | - Salimur Rahman
- Department of Hepatology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
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Ward G, Ramasamy S, Sykes J, Chowdhury F, Scarsbrook A, Harris K, Hatfield P, Crellin A, Sebag-Montefiore D, Radhakrishna G. EP-1706:A pilot study examining deformable imaging in deriving a PET-based PTV for oesophageal cancer radiotherapy planning. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31824-7] [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: 10/23/2022]
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Chowdhury F, Pathmanathan S, Aslam I, Hogg J, Kastelik J. P69 The use of assessment in the delivery of bronchoscopy simulation- Are skills retained at assessment? Thorax 2013. [DOI: 10.1136/thoraxjnl-2013-204457.219] [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: 11/04/2022]
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36
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Chowdhury F, Chaudhuri N, Renshaw S, Pathmanathan S, Hogg J, Hill J, Blaxill P, Rogers T, Kastelik J. P73 The creation of a simulated pan-deanery medical thoracoscopy and indwelling pleural catheter course: Abstract P73 Table 1. Thorax 2013. [DOI: 10.1136/thoraxjnl-2013-204457.223] [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: 11/03/2022]
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37
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Chowdhury F, Gondker A, Acharya N, Naseer R, Hill J, Hogg J, Kastelik J, Renshaw S, Bianchi S. P245 Standardisation of Bronchoscopy Training Across Yorkshire and Humber Deanery: Abstract P245 Table 1. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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38
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Chowdhury F, Fitzgerald THB, Nashef L, Elwes RDC, Richardson MP. 045 EEG phase coupling and network properties are abnormal in idiopathic generalised epilepsy patients and their relatives. J Neurol Psychiatry 2012. [DOI: 10.1136/jnnp-2011-301993.87] [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: 11/04/2022]
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40
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Cooper R, Swift S, Anderson J, Chowdhury F, Orton J, Scarsbrook A. Does FDG PET-CT Staging Influence Treatment for Patients with Cervical Carcinoma? Clin Oncol (R Coll Radiol) 2011. [DOI: 10.1016/j.clon.2011.01.383] [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: 11/26/2022]
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Krieger L, Lal R, Lang-Lazdunski L, Harrison-Phipps K, Chowdhury F. 81 The presentation and management of thymic epithelial malignancies & the Guy's and St Thomas' hospital experience. Lung Cancer 2011. [DOI: 10.1016/s0169-5002(11)70081-2] [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: 10/18/2022]
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42
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Chowdhury F, Tutt AL, Chan C, Glennie M, Johnson PW. Development, validation and application of ELISAs for pharmacokinetic and HACA assessment of a chimeric anti-CD40 monoclonal antibody in human serum. J Immunol Methods 2010; 363:1-8. [PMID: 20869964 DOI: 10.1016/j.jim.2010.09.023] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 09/07/2010] [Accepted: 09/16/2010] [Indexed: 11/22/2022]
Abstract
As part of a Phase I chimeric anti-CD40 monoclonal antibody clinical trial, two enzyme-linked immunosorbent assays (ELISAs) were developed for secondary endpoints: 1) for the pharmacokinetic (PK) monitoring of serum antibody levels and 2) for immunogenic screening of human anti-chimeric antibody (HACA) responses. The ELISA is a well established immunoassay, with clear guidelines for validation when used as a quantitative assay. However, these parameters may not always be relevant for a semi-quantitative assay used to assess whether a sample is positive or negative for a novel marker such as an antibody developed against a therapeutic antibody. We report here the development of a quantitative PK ELISA and a semi-quantitative HACA ELISA, and the different approaches of validation to prove each assay are 'fit for purpose.' The parameters of linearity (R²>0.99), accuracy (±30%), lowest level of detection (4 μg/ml), intra-assay (coefficient of variation (CV) <20%) and inter-assay (CV<20%) variability were assessed for the quantitative PK assay. For the semi-quantitative HACA assay, parameters of linearity (R²>0.99), lowest level of detection, intra (CV<10%) and inter-assay (CV<30%) variability were assessed using a surrogate positive control. The validation outcome showed that each assay was robust, reliable and accurate to meet the requirements of the intended analytical application, that being to 1) quantitatively determine the concentration of antibody in the serum and 2) determine whether a sample is positive or negative for human anti-chimeric antibodies. Each assay has been successfully translated for use in a clinical trial with adequate quality controls and acceptance criteria set for monitoring consistency and performance.
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Affiliation(s)
- F Chowdhury
- Cancer Sciences Division, CRUK Clinical Centre, University of Southampton, Southampton, SO16 6YD, UK.
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Johnson PW, Steven NM, Chowdhury F, Dobbyn J, Hall E, Ashton-Key M, Hodges E, Ottensmeier CH, Williams A, Glennie M. A Cancer Research UK phase I study evaluating safety, tolerability, and biological effects of chimeric anti-CD40 monoclonal antibody (MAb), Chi Lob 7/4. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.2507] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Khan AM, Hossain MS, Khan AI, Chisti MJ, Chowdhury F, Faruque ASG, Salam MA. Bacterial enteropathogens of neonates admitted to an urban diarrhoeal hospital in Bangladesh. J Trop Pediatr 2009; 55:122-4. [PMID: 18840632 DOI: 10.1093/tropej/fmn090] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Data on the aetiology of diarrhoea in neonates are scarce, especially from developing countries including Bangladesh. A retrospective review of the electronic database of the Microbiology Laboratory of the International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR,B), was carried out to examine enteropathogens associated with diarrhoea in neonates. Stool specimens of the neonates on admission to the Dhaka Hospital of ICDDR,B were collected and sent to the laboratory for direct plating onto taurocholate tellurite gelatin agar, Salmonella-Shigella agar and MacConkey's agar. Stool specimens of 2511 neonates of either sex were examined. Bacterial pathogens were recovered from the stools of 699 (27.8%) of these neonates--a single bacterial pathogen from 670 neonates and more than one pathogen from 29 neonates. Vibrio cholerae, Shigella, Salmonella, Aeromonas spp. and Plesiomonas shigelloides were isolated from 294, 108, 52, 222 and 19, respectively, of the neonates. The year-wise isolation of these pathogens varied between 4.9-23.4%, 2.7-5.4%, 0-4.7%, 0-19.4% and 0-1.6%, respectively, of the neonates. The results of the study indicate that infection by V. cholerae, Shigella spp., Salmonella spp., Aeromonas and P. shigelloides is common in neonatal diarrhoea in Bangladesh.
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Affiliation(s)
- A M Khan
- International Centre for Diarrhoeal Disease Research, GPO Box 128, Dhaka 1000, Bangladesh.
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Chowdhury F, Khan AI, Hossain MI, Malek MA, Faruque ASG, Ahmed T, Salam MA. Young children non-immunized against measles: characteristics and programmatic implications. Acta Paediatr 2006; 95:44-9. [PMID: 16373295 DOI: 10.1080/08035250500286987] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AIM To examine the presenting characteristics, including nutritional status, of young children without measles immunization and to suggest appropriate public health measures to improve immunization status. METHODS In this retrospective case-control analysis, we studied 4075 children aged 12-23 mo of either sex, who attended ICDDR,B's Dhaka hospital during 1994-2003. Cases included children who reported to this facility without receiving measles vaccine, and the control children were those who received the vaccine. RESULTS 3181 of 4075 (78%) children, including 1227 (39%) girls and 1954 (61%) boys, received measles immunization. The proportion of vaccinated children increased from 74% in 1997 to 82% in 2001. Some non-specific effects of measles immunization were observed. Fifty-one per cent of the children without measles immunization were stunted, 76% were underweight, and 48% were wasted. The non-immunized children were twice as likely to be stunted, underweight, and wasted than the immunized children; they were more often dehydrated (some or severe dehydration) (28% vs 22%, p<0.001), required longer duration (>72 h) of hospitalization (15% vs 10%, p<0.001), did not receive vitamin A capsule in the previous 6 mo (56% vs 36%, p<0.001), and had more frequent abnormal lung auscultation indicative of acute lower respiratory tract infections (8% vs 5%, p<0.001). Female children, illiterate mother, lack of vitamin A supplementation, and history of measles were significantly associated with non-immunization against measles after controlling for co-variables. Results were similar when different nutritional indicators (underweight, stunting, or wasting) were added separately to logistic regression models. CONCLUSION Intervention strategies to enhance immunization coverage in infants should target illiterate mothers and their children, particularly the females and malnourished ones, provide them with measles immunization and vitamin A capsule, and encourage their periodic follow-up visits as part of a preventive nutritional programme.
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Affiliation(s)
- F Chowdhury
- Clinical Sciences Division, ICDDR,B: Centre for Health and Population Research, GPO Box 128, Dhaka 1000, Bangladesh
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Chowdhury F, Khan AI, Hossain MI, Malek MA, Faruque ASG. Presence of neutral fat in stool and its association with aetiology and presenting features of diarrhoea in children. Trop Gastroenterol 2005; 26:80-4. [PMID: 16225051] [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: 05/04/2023]
Abstract
Enteric infections, impaired digestion, loss of villous cells, and poor absorption of fat may lead to presence of neutral fat in stool, particularly in children with diarrhoea. We aimed to examine the association between presence of neutral fat in stool and aetiology of diarrhoea and nutritional status of the patients at different age groups. A total of 13,171 patients aged 5 days-106 years enrolled in the Diarrhoeal Disease Surveillance System of the Dhaka Hospital of ICDDR,B during 1996-2001 were studied. Presence of neutral fat in faecal specimens, aetiology of diarrhoea, and nutritional status in children below 5 years of age were determined and analysed. Of the total study individuals, 7,671 (58%) had neutral fat in their faecal specimens. Neutral fat was more frequently present in faeces of individuals infected with rotavirus in all age groups or in enterotoxigenic E. coli (ETEC) infection in children 0-23 months old while compared with those who did not have these infections (p=0.005, p=0.014, respectively). Neutral fat was less frequently (p<0.001) present in malnourished 0-23 months old children. Presence of neutral fat in the stool in diarrhoea due to rotavirus and in young childhood ETEC diarrhoea signifies compromised gastrointestinal function due to these infections. The mechanism of persistence of neutral fat in the stool of such patients, and its nutritional and clinical implications require further studies.
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Affiliation(s)
- F Chowdhury
- Clinical Sciences Division, ICDDR,B: Centre for Health and Population Research, Bangladesh
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Chowdhury F, Bin Jiang. A new technique for fast detection of progressive faults. Proceedings of the 2004 American Control Conference 2004. [DOI: 10.23919/acc.2004.1384652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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