Welcome to the Evidence-based Toxicology (EBT) course. In medicine and healthcare, evidence-based medicine has revolutionized the way that information is evaluated transparently and objectively. Over the past ten years, a movement in North America and Europe has attempted to translate this revolution to the field of toxicology.
The Center for Alternatives to Animal Testing (CAAT) within the department of Environmental Health and Engineering at the Johns Hopkins Bloomberg School of Public Health hosts the first chair for EBT and the secretariat for the EBT Collaboration on both sides of the Atlantic. Based on the Cochrane Collaboration in Evidence-based Medicine, the EBT Collaboration was established at the CAAT to foster the development of a process for quality assurance of new toxicity tests for the assessment of safety in humans and the environment.
Regulatory safety sciences have undergone remarkably little change in the past fifty years. At the same time, our knowledge in the life sciences is doubling about every seven years. Systematic review and related evidence-based approaches are beginning to be adapted by regulatory agencies like the Environment Protection Agency (EPA), the European Food Safety Authority (EFSA), and the US National Toxicology Program. They provide transparent, objective, and consistent tools to identify, select, appraise, and extract evidence across studies.
This course will showcase these emerging efforts and address opportunities and challenges to the expanded use of these tools within toxicology.
This module introduces you to the course, outlines the shortcomings of current toxicity testing approaches, and shows how EBT can help to overcome these shortcomings.
What's included
9 videos3 readings1 assignment1 discussion prompt
Show info about module content
9 videos•Total 66 minutes
Welcome•4 minutes
Introduction to the Course•14 minutes
Introduction•6 minutes
Shortcoming No. 1: Narrative Reviews•7 minutes
Shortcoming No. 2: Bias in Reviews•8 minutes
Shortcoming No. 3: Evidence Writing•4 minutes
Shortcoming No. 4: External Validity•10 minutes
Shortcoming No. 5: Assessing New Methods•5 minutes
Shortcoming No. 6: Inadequate Reporting•7 minutes
3 readings•Total 30 minutes
Letter to Learners•10 minutes
Course Learning Objectives•10 minutes
Supporting reading•10 minutes
1 assignment•Total 30 minutes
Practice Quiz 1•30 minutes
1 discussion prompt•Total 10 minutes
Rank the shortcomings•10 minutes
History and Causation
Module 2•3 hours to complete
Module details
This module explains how evidence-based toxicology originated and describes the driving forces for the initiative. In the second lesson, you will learn how to distinguish between correlation and causation as well as the main problems with drawing conclusions on the basis of correlations. The Bradford Hill criteria are introduced, along with examples for each criterion. You will also learn about mechanistic toxicology and mechanistic validation.
Personal First Exposures to Evidence-Based Medicine•22 minutes
The Start of EBT•17 minutes
The First Conference 2007 to the Start of the EBT Collaboration 2011•14 minutes
The Evidence-Based Toxicology Collaboration (EBTC)•14 minutes
Introduction Causation vs. Correlation•19 minutes
The Hill Principles of Epidemiology and their Relation to Toxicology•16 minutes
The Problem of Causation in Toxicology•16 minutes
Biomarker Concept in Mechanistic Toxicology•5 minutes
Mechanistic Validation•5 minutes
The Future of Causation in Complex Systems•9 minutes
2 readings•Total 20 minutes
Supporting reading•10 minutes
Supporting reading•10 minutes
1 assignment•Total 30 minutes
Practice Quiz 2•30 minutes
1 discussion prompt•Total 10 minutes
Importance of EBT•10 minutes
Systematic Review and Meta-Analysis
Module 3•3 hours to complete
Module details
This module shows how to perform systematic reviews and meta-analyses. You will learn the history of both methods and will receive step-by-step instructions on how to perform systematic reviews and meta-analyses using examples from the research activities of the instructors.
Systematic Reviews - Protocol Development (Part 2)•20 minutes
History•6 minutes
Meta-analysis Guidelines•7 minutes
Meta-analysis Protocol, Part 1•11 minutes
Meta-analysis Protocol, Part 2•12 minutes
2 readings•Total 20 minutes
Supporting reading•10 minutes
Supporting reading•10 minutes
2 assignments•Total 60 minutes
Mid-course exam•30 minutes
Practice Quiz 3•30 minutes
1 discussion prompt•Total 10 minutes
Systematic Review and Meta-analysis•10 minutes
Risk of Bias & Application to Test Methods Comparison
Module 4•2 hours to complete
Module details
This module teaches you about possible biases that can be introduced at different stages of research. Each bias is explained with examples, including solutions for overcoming those biases. The second lesson covers systematic review of the zebrafish embryotoxicity test as a case study conducted by the Evidence-based Toxicology Collaboration (EBTC). You will go through all of the steps of the systematic review again to imprint the knowledge from module 3, but this systematic review will be related to a toxicological method.
What's included
8 videos2 readings1 assignment1 discussion prompt
Show info about module content
8 videos•Total 94 minutes
Welcome to Module 4•4 minutes
Introduction to Risk of Bias Concept in Critical Appraisal of Studies•27 minutes
Examples for Risk of Bias Tools 1: Cochrane Collboration•5 minutes
Examples for Risk of Bias Tools 2: SYRCLE's RoB Tool•5 minutes
Examples of Risk of Bias Tools 3: National Institute for Environmental Health Sciences (NIEHS) - OHAT•13 minutes
Quality Assessment in Evidence-Based Toxicology•8 minutes
Evidence-Based Toxicology (EBT) and Evidence-Based Toxicology Collaboration (EBTC)•12 minutes
Zebrafish Systematic Review•22 minutes
2 readings•Total 20 minutes
Supporting reading•10 minutes
Supporting reading•10 minutes
1 assignment•Total 10 minutes
Practice Quiz 4•10 minutes
1 discussion prompt•Total 10 minutes
Risk of Bias is important to consider•10 minutes
Quality Assurance, Good Practices, and Validation
Module 5•3 hours to complete
Module details
Quality control is a very important aspect of not only modern toxicology but the entirety of life sciences. The first lesson in this module demonstrates the importance of performing quality control on your experiments. The second lesson is connected with the first one because validation of an alternative method requires highly standardized protocols and quality control at each step. This lesson teaches you different aspects of alternatives methods validation, how to perform classical validation, its pitfalls, and strategies to overcome them.
The Concepts of Quality Assurance (QA) and Good Practice (GP)•14 minutes
Good Practice•22 minutes
Quality Assurance•12 minutes
Importance of GP and QA in EBT•6 minutes
The Evolution of Validation of Alternative Methods•29 minutes
The Traditional Validation Process•26 minutes
Example of a Validation Study: Skin Irritation•10 minutes
Developments in the Validation Area•7 minutes
Validation and Tox-21c/EBT•11 minutes
2 readings•Total 20 minutes
Supporting reading•10 minutes
Supporting reading•10 minutes
1 assignment•Total 30 minutes
Practice Quiz 5•30 minutes
1 discussion prompt•Total 10 minutes
Changes in the validation process•10 minutes
Biometrical Tools & Future Perspectives
Module 6•3 hours to complete
Module details
Evidence-based toxicology requires some knowledge of bioinformatics. The first lesson in the module teaches you some biostatistical tools you can apply when analyzing predectivity, specificity, and sensitivity of a method. You will also learn how to identify biases in a study with the help of bioinformatics. Evidence-based principles can be applied to every question you might have, even to which pizza to order tonight. You will learn the difference between eminence-based vs. evidence-based approaches. You will learn what is driving the lack of reproducibility and how evidence-based approaches should help to overcome the reproducibility crisis in science, which is explained with examples of experimental design, wrong models, poor quality of the cell cultures, etc.
What's included
8 videos1 reading2 assignments1 discussion prompt
Show info about module content
8 videos•Total 98 minutes
Welcome to Module 6•4 minutes
Why We Need Biometry/Statistics in Evidence-Based Toxicology•10 minutes
Statistics and Bioinformatics Applied in Evidence-Based Approaches I•12 minutes
Statistics and Bioinformatics Applied in Evidence-Based Approaches II•18 minutes
Risk and Bias and Its Impact on Evidence-Based Approaches•13 minutes
Evidence-Based Is a More Rigorous Scientific Approach to Anything•5 minutes
The Reproducibility Crisis in Science•25 minutes
Where Is Evidence-Based Toxicology (EBT) and What Are The Next Steps?•12 minutes
The final week of the course is devoted to completing the Systematic Review Assignment. You will use SysRev to review at least 20 abstracts, apply inclusion and exclusion criteria, render decisions, and resolve conflicts with other reviewers.
The mission of The Johns Hopkins University is to educate its students and cultivate their capacity for life-long learning, to foster independent and original research, and to bring the benefits of discovery to the world.
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When you purchase a Certificate you get access to all course materials, including graded assignments. Upon completing the course, your electronic Certificate will be added to your Accomplishments page - from there, you can print your Certificate or add it to your LinkedIn profile.
Is financial aid available?
Yes. In select learning programs, you can apply for financial aid or a scholarship if you can’t afford the enrollment fee. If fin aid or scholarship is available for your learning program selection, you’ll find a link to apply on the description page.