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- Nelson, G., et al.
(author)
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QUAREP-LiMi: A community-driven initiative to establish guidelines for quality assessment and reproducibility for instruments and images in light microscopy
- 2021
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In: Journal of Microscopy. - : Wiley. - 0022-2720 .- 1365-2818. ; 284:1, s. 56-73
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Journal article (peer-reviewed)abstract
- A modern day light microscope has evolved from a tool devoted to making primarily empirical observations to what is now a sophisticated , quantitative device that is an integral part of both physical and life science research. Nowadays, microscopes are found in nearly every experimental laboratory. However, despite their prevalent use in capturing and quantifying scientific phenomena, neither a thorough understanding of the principles underlying quantitative imaging techniques nor appropriate knowledge of how to calibrate, operate and maintain microscopes can be taken for granted. This is clearly demonstrated by the well-documented and widespread difficulties that are routinely encountered in evaluating acquired data and reproducing scientific experiments. Indeed, studies have shown that more than 70% of researchers have tried and failed to repeat another scientist's experiments, while more than half have even failed to reproduce their own experiments. One factor behind the reproducibility crisis of experiments published in scientific journals is the frequent underreporting of imaging methods caused by a lack of awareness and/or a lack of knowledge of the applied technique. Whereas quality control procedures for some methods used in biomedical research, such as genomics (e.g. DNA sequencing, RNA-seq) or cytometry, have been introduced (e.g. ENCODE), this issue has not been tackled for optical microscopy instrumentation and images. Although many calibration standards and protocols have been published, there is a lack of awareness and agreement on common standards and guidelines for quality assessment and reproducibility. In April 2020, the QUality Assessment and REProducibility for instruments and images in Light Microscopy (QUAREP-LiMi) initiative was formed. This initiative comprises imaging scientists from academia and industry who share a common interest in achieving a better understanding of the performance and limitations of microscopes and improved quality control (QC) in light microscopy. The ultimate goal of the QUAREP-LiMi initiative is to establish a set of common QC standards, guidelines, metadata models and tools, including detailed protocols, with the ultimate aim of improving reproducible advances in scientific research. This White Paper (1) summarizes the major obstacles identified in the field that motivated the launch of the QUAREP-LiMi initiative; (2) identifies the urgent need to address these obstacles in a grassroots manner, through a community of stakeholders including, researchers, imaging scientists, bioimage analysts, bioimage informatics developers, corporate partners, funding agencies, standards organizations, scientific publishers and observers of such; (3) outlines the current actions of the QUAREP-LiMi initiative and (4) proposes future steps that can be taken to improve the dissemination and acceptance of the proposed guidelines to manage QC. To summarize, the principal goal of the QUAREP-LiMi initiative is to improve the overall quality and reproducibility of light microscope image data by introducing broadly accepted standard practices and accurately captured image data metrics.
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| 5. |
- Werth, V, et al.
(author)
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BIIB059, A HUMANIZED MONOCLONAL ANTIBODY TARGETING BDCA2 ON PLASMACYTOID DENDRITIC CELLS (PDC), SHOWS DOSE-RELATED EFFICACY IN THE PHASE 2 LILAC STUDY IN PATIENTS (PTS) WITH ACTIVE CUTANEOUS LUPUS ERYTHEMATOSUS (CLE)
- 2020
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In: ANNALS OF THE RHEUMATIC DISEASES. - : BMJ. - 0003-4967 .- 1468-2060. ; 79, s. 120-121
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Conference paper (other academic/artistic)abstract
- CLE represents an unmet medical need with no approved therapy. BIIB059, a humanized monoclonal antibody, binds to BDCA2 and inhibits pro-inflammatory mediators production, including type I interferons. BIIB059 was evaluated in Phase 1 studiesNCT02106897andNCT03224793. LILAC is a 2-part Phase 2 study: Part A enrolled SLE pts; Part B enrolled pts with active CLE (NCT02847598).Objectives:Evaluate efficacy and safety of BIIB059 in pts enrolled in Part B at Week 16, end of treatment (EOT) period.Methods:Pts with active CLE, SCLE and/or CCLE and adjudicated Cutaneous Lupus Disease Area and Severity Index – Activity (CLASI-A) ≥8 were enrolled and randomized to receive either BIIB059 (50, 150 or 450 mg) or placebo (PBO) s.c. Q4W. Primary endpoint was dose response defined by % change in CLASI-A score from baseline (BL) to Week 16. Secondary endpoints included CLASI-50 response rate and ≥ 7-point reduction in CLASI-A score from baseline to EOT. Adverse events and serious adverse events were recorded throughout the study.Results:132 pts with active CLE were randomized. The study met its primary endpoint, demonstrating a dose response (p= 0.0005) and a statistically significant difference in % change from BL in CLASI-A score in BIIB059-treated pts vs PBO. Table 1 and Table 2 summarize efficacy and safety results, respectively.Table 1.Efficacy EndpointsBIIB059PBO50 mg150 mg450 mgLS Mean (SE)LS Mean (SE)LSMD*from PBO (95% CI)P val.LS Mean(SE)LSMD*from PBO (95% CI)P val.LS Mean(SE)LSMD*from PBO (95% CI)P val.Primary EndpointCLASI-A % change from BL-14.5 (6.4)-40.8 (7.5)-26.3 (-45.7; -7.0)0.008-47.9 (7.4)-33.5 (-52.7; -14.3)0.001-43.5 (5.5)-28.0 (-44.5; -11.5)0.001Secondary Endpointsn(%)n(%)LSMD*from PBO (95% CI)P val.n(%)LSMD*from PBO (95% CI)P val.n(%)LSMD*from PBO (95% CI)P val.Prop. of participants achieving CLASI 507/32 (21.9%)10/26 (38.5%)15.8% (-7; 39)0.13311/25 (44.0%)21 (-2.8; 45)0.05920/43 (46.5%)23 (3; 44)0.024Prop. of participants achieving a ≥7-point CLASI-A reduction from BL7/32 (21.9%)9/26 (34.6%)12.3 (-11.3; 35.8)0.22812/25 (48.0%)22.2 (-2.0; 46.3)0.05518/43 (41.8%)16.8 (-6.7; 40.4)0.048*LSMD=LS Mean DifferencePBOBIIB059OVERALLN=3350 mgN=26150 mgN=25450 mgN=48PooledN=99N=132Any Event, n(%)18 (54.5)17 (65.4)12 (48)33 (68.8)62 (62.6)80 (60.6)SeverityMild11 (33.3)11 (42.3)8 (32.0)19 (39.6)38 (38.4)49 (37.1)Moderate4 (12.1)6 (23.1)3 (12.0)12 (25.0)21 (21.2)25 (18.9)Severe3 (9.1)01 (4.0)2 (4.2)3 (3.0)6 (4.5)Related events6 (18.2)9 (34.6)4 (16.0)16 (33.3)29 (29.3)35 (26.5)Serious events2 (6.1)03 (12.0)2 (4.2)5 (5.1)7 (5.3)Related serious events1 (3.0)01 (4.0)1 (2.1)2 (2.0)3 (2.3)Events leading to drug withdrawal01 (3.8)1 (4.0)1 (2.1)3 (3.0)3 (2.3)Events leading to study withdrawal0001 (2.1)1 (1.0)1 (0.8)Fatal events000000Conclusion:BIIB059 administration to pts with active CLE resulted in statistically significant dose-related improvement in disease activity vs PBO with no untoward safety signals. Further development of BIIB059 in CLE is warranted.Disclosure of Interests:Victoria Werth Grant/research support from: Biogen, Celgene, Gilead, Janssen, Viela, Consultant of: Biogen, Gilead, Janssen, Abbvie, GSK, Resolve, AstraZeneca, Amgen, Eli Lilly, EMD Serono, BMS, Viela, Kyowa Kirin, Richard Furie Grant/research support from: AstraZeneca, Biogen, Consultant of: AstraZeneca, Biogen, Juanita Romero-Diaz Consultant of: Biogen, Sandra Navarra Speakers bureau: Astellas, Novartis, Pfizer, Johnson & Johnson, Abbvie, Kenneth Kalunian Grant/research support from: Pfizer, Lupus Research Alliance, Sanford Consortium, Consultant of: Genentech, Nektar, BMS, Janssen, AstraZeneca, Biogen, Vielabio, Equillium, Eli Lilly, ILTOO, Abbvie, Amgen, Roche, Gilead, Ronald van Vollenhoven Grant/research support from: AbbVie, Arthrogen, Bristol-Myers Squibb, GlaxoSmithKline, Lilly, Pfizer, and UCB, Consultant of: AbbVie, AstraZeneca, Biotest, Bristol-Myers Squibb, Celgene, GSK, Janssen, Lilly, Medac, Merck, Novartis, Pfizer, Roche, and UCB, Filippa Nyberg Consultant of: Biogen, Benjamin Kaffenberger Grant/research support from: Amgen, Biogen, InflaRx, Veloce Biopharmaceuticals, Dermatology Foundation, Saira Sheikh: None declared, Goran Radunovic: None declared, XIAOBI HUANG Shareholder of: Biogen, Employee of: Biogen, HUA CARROLL Shareholder of: Biogen, Employee of: Biogen, Francois Gaudreault Shareholder of: Biogen, Employee of: Biogen, Adam Meyers Shareholder of: Biogen, Employee of: Biogen, Catherine Barbey Shareholder of: Biogen, Employee of: Biogen, Cristina Musselli Shareholder of: Biogen, Employee of: Biogen, NATHALIE FRANCHIMONT Shareholder of: Biogen, Employee of: Biogen
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