2014-01-22Stefan Franzén Introduction to clinical trials.

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Presentation transcript:

Stefan Franzén Introduction to clinical trials

Definition of a clinical trial A research activity that involves administration of a test treatment to some experimental unit in order to evaluate the treatment.

Key words Experimental unit Treament Evaluate Subject from a target population. Pharmaceutical, diet, procedure, diagnostic, device, program, placebo. Assessment of (clinical) effect, but also adverse events, lab variables, vital signs, quality of life, health economy.

The first study I have found two treats that makes a letcure seem more interesting. How do I find out which one is best?

The Wheel of Science Research question Experiment Data Conlusion

Drug discovery/development process discovery; refinement; chemical & biological characterisation safety & toxicity in animals; formulation development volunteer studies; patient studies regulatory process marketing post registration monitoring Lessons & development Discovery=find new active structure : Development=convert it to a useful drug

The path to a new medicine Years No. of compounds Up to 10, First patent application Clinical trial application Product licence application Drug DiscoveryDrug Development Target and lead identification Lead optimisation Concept testing Development for launch Launch Clinical Development Phase I people Phase II people Phase III 500-5,000 people Phase IV studies continue Product life cycle support Toxicology and pharmacokinetic studies (absorption, distribution, metabolism, excretion) Pharmaceutical and analytical development Process chemistry and manufacturing Registration and regulatory affairs Sales and marketing (preparation, promotion, advertising and selling)

Phase I The drug seems reasonably safe in animal study, but has never been tested on humans What do we want to know? How can we find that out?

Phase I trials Focused on tolerability and safety (150) healthy people (often males) Efficacy on biomarkers if possible Single and repeated doses Increase dose levels Interaction with other drugs Pharmacokinetics Explorative’ ADME (Absorption, Distribution, Metabolism Excretion) Through QT study Bridging, PK in other populations Phase I people Phase II people Phase III people Phase IV studies continue

Phase II The drug seems to be resonably safe in humans and there is some sign of an effect on something. What do we want to know next? How can we find that out?

Phase 2 trials patients Extensive monitoring Safety and tolerability in patients Often complicated design, explorative Selection of optimal dose Pharmacokinetics in patients Effect in special populations Explorative Phase I people Phase II people Phase III 500-5,000 people Phase IV studies continue

Phase III The drug seems resonable safe to give to patients and we have and idea of which dose to use. What do we want to know now? How can we find that out?

Phase 3 trials patients Effect is verified in the target population Forms the basis of the NDA, New Drug Application Interactions between drugs start to become measurable in the larger population sub-groups start to be established special features and problems show up Confirmative Phase I people Phase II people Phase III people Phase IV studies continue

Phase IV Our drug is approved for use on patients. What’s next?

Phase IV trials Often large patients Further investigation of efficacy and safety post approval Special populations New indications Marketing Phase I people Phase II people Phase III 500-5,000 people Phase IV studies continue

Observational studies Data is collected for a set of patients without any randomisation Prospective: Data is collected after the objectives are set Retrospective: Data is collected before the objectives are set time now data collectionanalysisinterpretation time now data collectionanalysisinterpretation

Where to look for information ICH (international Conference on Harmonisation) FDA (Food and Drug Agency) EMEA (European Medicines Agency) Cochrane Collaboration

ICH Quality Efficacy Safety Multidiciplinary

ICH Quality guidelines Harmonisation achievements in the Quality area include pivotal milestones such as the conduct of stability studies, defining relevant thresholds for impurities testing and a more flexible approach to pharmaceutical quality based on Good Manufacturing Practice (GMP) risk management.

ICH safety guidelines ICH has produced a comprehensive set of safety Guidelines to uncover potential risks like carcinogenicity, genotoxicity and reprotoxicity. A recent breakthrough has been a non-clinical testing strategy for assessing the QT interval prolongation liability: the single most important cause of drug withdrawals in recent years. S7A: Safety Pharmacology Studies for Human Pharmaceutical S7B: The Non-Clinical Evaluation of the Potential for Delayed Ventricular Repolarization (QT prolongation) by Human Pharmaceutical

ICH efficacy guidelines The work carried out by ICH under the Efficacy heading is concerned with the design, conduct, safety and reporting of clinical trials. It also covers novel types of medicines derived from biotechnological processes and the use of pharmacogenetics/genomics techniques to produce better targeted medicines.

ICH Efficacy Guidelines Clinical Safety E1-E2F Clinical Study Reports E3 Dose Reponse Studies E4 Ethnic Factors E5 Good Clinical Practise E6 Clinical Trials E7-E11 Clincal Evaluation of a Therapeutic Category E12 Clincal Evaluation E14 Pharmacogenomics E15-E16 Cross Cutting Topics E17

ICH Efficacy Guidelines E7: Studies in Support of Special Populations, Geriatrics E8: General Considerations for Clinical Trials E9: Statistical Principles for Clincal Trials E10: Choice of Control Group and Related Issues E11: Clinical Investigation of Medicinal Products in the Pediatric Population

The Clinical Study Process Outline Clinical Study Protocol Statistical Analysis Plan Study Conduct Data Capture Study Setup Statistical Analysis Clinical Study Report Publications Clean File T i m e Preparation of statistical analysis Data base lock

Chapter 1 Reading instructions 1.1 What are clinical trials: Read 1.2 History of clinical trials: Less important 1.3 Regulatory process and requirements: Read page Investigational new drug application: Read page 17– New drug application: Less important 1.6 Clinical development plan and practise: Read 1.7 Aims and structure of this book: Skip