[Main characteristics of the new authorisation procedure for clinical trials with medicinal products according to regulation (EU) no 536/2014 and the cooperation between the member states]. / Grundzüge des neuen Genehmigungsverfahrens für klinische Arzneimittelprüfungen im Rahmen der Verordnung (EU) Nr. 536/2014 und der Zusammenarbeit zwischen den Mitgliedstaaten.

With Regulation (EU) No. 536/2014 on clinical trials on medicinal products for human use, which became applicable on 31 January 2022, full harmonisation of the authorisation and monitoring procedures of clinical trials with medicinal products in the European Union (EU) and the European Economic Area (EEA) has been achieved. In addition to an entirely paperless application procedure, communication between all parties involved is done through the Clinical Trials Information System (CTIS), which was developed specifically for the Regulation and through which all non-proprietary information and content of the clinical trial application and results are also made available to the public. As was already the case under the old legal framework, the authorisation of a clinical trial is granted by each Member State concerned; however, the assessment of the common part of the dossier of a clinical trial that is conducted in more than one Member State is jointly done by the respective Member States under the coordinating lead of a reporting Member State. The present article outlines the authorisation procedure with its deadline concept and addresses further aspects of the Regulation, such as details on the protection of the trial subjects, safety reporting and transparency rules.

Master protocols in clinical trials: a universal Swiss Army knife?

Master protocols combine several sub-trials, each with their own research objectives, which is usually presented as one single clinical trial application. Master protocols have become increasingly popular in oncology and haematology, as either basket, umbrella, or platform trials. Although master protocols are intended to accelerate drug development and to reduce futility, their use poses challenges to ethics committees, patients, study investigators, and competent authorities during the review and authorisation process of a clinical trial application. In this Personal View, we review the experiences of clinical trial applications from two European medical regulators-the Danish Medicines Agency and the German Federal Institute for Drugs and Medical Devices. We view master protocols as a good opportunity to identify new treatment options more quickly, particularly for patients with cancer. However, the complexity of trial documentation, the amount of information resulting from sub-trials, and the volume of changes and amendments made to clinical trial applications can cause issues during trial supervision, and during the analysis and review of a corresponding application for marketing authorisation. We draw attention to the potential issues arising from these trial concepts and propose possible solutions to avoid problems during clinical trial authorisation and trial conduct.

[Ethics committees in clinical trials involving medicinal products]. / Die Rolle von Ethikkommissionen bei der Bewertung klinischer Arzneimittelprüfungen.

Over the years, the role of ethics committees (ECs) in the review process of clinical trial applications (CTAs) has changed from being a collegial advisory body to a patient protection organisation with an authority character. While the law governing the medical profession in Germany only provides for an obligation for physicians to ask for an EC review in biomedical research on human beings, a negative opinion on the CTA does not lead to the inadmissibility of the research project from a legal point of view. In contrast, the German Medicinal Product Act (Arzneimittelgesetz, AMG) requires a favourable opinion as an approving assessment by the competent EC.The AMG defines both the elements of a clinical trial application to be reviewed by the EC as well as the principle grounds of non-acceptance to reject a favourable opinion. ECs that assess CTAs must be constituted in accordance with the state law and must be composed of interdisciplinary medical specialists, lawyers and methodologists. The main assessment criteria are a medically acceptable risk-benefit ratio, the appropriateness of the methods used, including biometric aspects, the requirements to be met by the study participants, such as their ability to give consent, the suitability of the investigators and trial facilities as well as the appropriateness of the written information with which the study participants are to be informed and give their consent.In spite of the already high degree of regulation, the applicability of the European Clinical Trial Regulation will result in even more detailed legal requirements for the composition and working procedures of an EC with the aim of further harmonising the assessment of CTAs in the EU.

Analysis of integrated clinical trial protocols in early phases of medicinal product development.

PURPOSE: While in the past, most clinical trial applications (CTAs) following non-integrated (standard) protocols were used to investigate one primary objective concerning a (new) drug, nowadays, the use of integrated protocols investigating multiple objectives within the same CTA becomes more and more popular. The aims of the present study were to investigate the usage and the impact of integrated protocols on regulatory activities and to find the motivation for their increasing use. METHODS: Two thousand nine hundred sixty-nine phase I and I/II CTAs submitted to the German Federal Institute for Drugs and Medical Devices (BfArM) during the time period from August 1, 2004, until August 31, 2014, were analysed with regard to protocol and sponsor status, duration until initial authorisation and the number of substantial amendments and their respective approval times. Additionally, applicants who submitted integrated protocols to BfArM were interviewed with respect to their opinion on integrated protocols in an online survey. RESULTS: The percentage of integrated protocols has constantly increased by approximately 10% within the last 10 years from 17.9% in 2004 to 28.2% in 2014. It could be shown that authorisation procedures with single integrated protocols take significantly longer until initial authorisation (58 vs. 53 days) requires more substantial amendments (1.9 vs. 1.2 amendments per CTA) and the approval of the entirety of amendments takes longer to process as compared to standard protocols (22 vs. 14 days). Nevertheless, applicants prefer the use of integrated protocols due to higher time and cost economy for the entire phase I development process. CONCLUSION: Although clinical trials (CTs) following integrated protocols are partly more time-consuming and costly, still, time and/or money may be saved during drug development due to the fact that overall, fewer CTs are needed than with standard protocols. Hence, the main reason for the increasing use of integrated protocols is improved time and cost efficiencies when conducting CTs.

Who is a 'healthy subject'?-consensus results on pivotal eligibility criteria for clinical trials.

INTRODUCTION/METHODS: A discussion forum was hosted by the German not-for-profit Association for Applied Human Pharmacology (AGAH e.V.) to critically review key eligibility criteria and stopping rules for clinical trials with healthy subjects, enrolling stakeholders from the pharmaceutical industry, contract research organisations, academia, ethics committees and competent authority. RESULTS: Pivotal eligibility criteria were defined for trials with new investigational medicinal products (IMPs) or with clinically established IMPs. In general, a pulse rate ranging between 50 and 90 beats/min is recommended for first-in-human (FIH) trials, while wider ranges seem acceptable for trials with clinically established IMPs, provided there are no indications of thyroid dysfunction. Hepatic laboratory parameters not to exceed the upper limit of normal (ULN) comprise ALT (alanine aminotransferase) and AST (aspartate aminotransferase) in FIH trials, whereas slight elevations (10% above ULN) seem acceptable in trials with clinically established IMPs without known hepatotoxicity. A normal renal function is required for any clinical trial in healthy subjects. A risk-adapted approach for stopping rules was adopted. Stopping rules for an individual subject are one adverse event of severe intensity or one serious adverse event. In case of a severe adverse event, some stakeholders demand a causal relationship with the IMP (i.e. an adverse reaction). Stopping rules for a cohort are one serious adverse reaction or ≥50% of subjects experiencing any adverse reaction of moderate or severe intensity. CONSEQUENCES: The application of this consensus resulted in a reduction in protocol deficiencies issued by the competent authority.

[Joint pilot project of the German higher federal authorities and ethics committees on implementing the EU Regulation on clinical trials]. / Gemeinsames Pilotprojekt von Bundesoberbehörden und Ethikkommissionen zur Umsetzung der EU-Verordnung zu klinischen Prüfungen.

BACKGROUND: The European Clinical Trials Regulation 536/2014 and the corresponding national legal transitions will require close cooperation between the federal higher authorities and ethics committees in the assessment of clinical trial applications involving medicinal products in humans. In preparation for this, a pilot project was launched to simulate the future processes of the regulation in line with current legal requirements and in order to give applicants, authorities and ethics committees the opportunity to familiarise themselves with the new procedures. OBJECTIVES: The aim of this paper is to examine all pilot project procedures of the first year since starting the pilot project at the end of 2015. MATERIALS AND METHODS: All 20 pilot projects completed in the first year were analysed for adherence to deadlines and results of the assessments. RESULTS: Within the time limits specified in the EU regulation, 17 of 20 procedures were fully completed. In two cases, the sponsors slightly exceeded the additional delivery period. In one case, the sponsor withdrew the application within the pilot procedure. All 20 applications were processed jointly by the federal authorities and ethics committees, and in all cases a coordinated assessment report was successfully compiled on time. All 20 applications were approved, five of which were subject to suspensive conditions. CONCLUSIONS: Compliance with the deadlines set by federal authorities and ethics committee shows that the technical infrastructures and processes established in the pilot procedure are fully functional. The cooperation between the federal higher authorities and ethics committees was very successful from the perspective of the parties involved.

[Changes in the German Medicinal Product Act imposed by the EU regulation on clinical trials]. / Änderungen des Arzneimittelgesetzes durch die EU-Verordnung zu klinischen Prüfungen.

The entry into force of Regulation (EU) No. 536/2014 of the European Parliament, the Council of 16 April 2014 for clinical trials on medicinal products for human use, and repealing Directive 2001/20/EC necessitated amendments to the national legislation on medicinal products. These changes mainly concern the sixth chapter of the German Medicinal Products Act (Arzneimittelgesetz, AMG) and the elimination of the GCP (good clinical practice) ordinance for clinical trials that will be covered by the regulation in the future. Sections 41a, 41b and 41c, which came into force in December 2016, regulate the registration procedure, the procedural rules and the business distribution plan according to which the responsibilities of the registered ethics committees for the authorisation procedures will be determined and cooperation with the federal higher authorities will be handled. All other amendments in the sixth chapter will not enter into force until the date of application of the regulation - presumably in the fourth quarter of 2018. In the future, Section 40a will regulate the general prerequisites - in particular the basic procedures for cooperation between the federal higher authority and the ethics committees - in addition to the provisions of the regulation. Section 40b governs special prerequisites for clinical trials and contains, in particular provisions for the informed consent in clinical trials with minors and incapacitated adults. Further changes concern, among other things, the transfer of previous regulations of the GCP ordinance into the AMG and adjustments regarding reporting obligations in the context of clinical trials in the AMG.

[Improving drug licensing for children and adolescents : Position paper from the More Medicines for Minors Symposion 8 June 2015 in Bonn]. / Arzneimittelzulassung für Kinder und Jugendliche verbessern : Positionspapier zum Kinderarzneimittel-Symposium am 8. Juni 2015 in Bonn.

In Germany and throughout Europe, medicinal products for adults have been developed and evaluated systematically for decades. Medicinal products for children and adolescents, however, have only been researched for the past ten years. As a result, many medicinal products have been administered to children without systematic clinical trials, for example regarding dosage or pharmaceutical form.EU Regulation 1901/2006 aimes to close the gaps in the medical treatment of children and adolescents. In order to do so, the regulation provides for paediatric use marketing authorisations (PUMA) for previously authorised products no longer covered by intellectual property rights and also grants holders of such PUMA licenses further property rights. However, only two PUMA licenses have been applied for. Thus, the PUMA license instrument is hardly being used despite the fact that many medicinal products have a great potential for closing medical gaps for children and adolescents.In order to improve the situation regarding medicinal products for children and adolescents, this scientific symposium "More Medicines for Minors" intended to promote dialogue among the parties involved and to provide an opportunity to discuss reasons for the reluctance to apply for PUMA licenses. Speakers specialised in paediatric and adolescent medicine as well as those from licensing authorities, the Federal Joint Committee (Gemeinsamer Bundesausschuss, G­BA), the pharmaceutical industry and the federal ministries presented problems and possible solutions from their point of view with the aim of making the PUMA license instrument more attractive.

A 1-year cross-sectional analysis of non-interventional post-marketing study protocols submitted to the German Federal Institute for Drugs and Medical Devices (BfArM).

PURPOSE: The aim of non-interventional studies (NIS) with medicinal products is to investigate the use of authorized medicinal products in daily routine. In the past, this type of study has been subject to frequent criticism, and many recommendations have been published. The aim of our study was to assess the quality of NIS study protocols. METHODS: Nearly all NIS study protocols submitted to the German Federal Institute for Drugs and Medical Devices (BfArM) within a period of one year could be analyzed. The protocols were evaluated in terms of objectives, methods and included patients, as well as with regard to their compliance with quality recommendations for NIS by federal authorities and pharmaceutical industry associations. RESULTS: The 136 NIS available for study were scheduled to enroll approximately 330,000 patients (2,500 patients per study) and 43,000 healthcare professionals. Of these NIS, 58 % were performed with medicinal products that had been authorized within the past 5 years; however, 68 % of the investigated active pharmaceutical ingredients were older than 5 years, and 19 % were even older than 19 years. Only 56 % of the protocols provided information on publication policy, and 65 % required the involvement of ethic committees. The adherence to current quality recommendations was average, but the compliance of NIS performed by member companies of the Association of Research-Based Pharmaceutical Companies was significantly higher than that of other sponsors. CONCLUSIONS: Current quality recommendations are still not fully implemented in most NIS protocols. Therefore, the scientific value of many NIS is still questionable, and the criticism that NIS are mainly conducted for marketing reasons could not be refuted by the data analyzed here.

A Systematic Database Approach to Identify Companion Diagnostic Testing in Clinical Trials under the New In Vitro Diagnostic Medical Devices Regulation.

The European Union In Vitro Diagnostic Medical Devices Regulation (EU) 2017/746 (IVDR) introduces companion diagnostics (CDx) as a new legal term. CDx are applied in combination with a medicinal product to identify patient subgroups most likely to benefit from a treatment or who are at increased risk. This new regulation came into full effect on 26 May 2022 and represents the current development in personalized medicine. The implementation of IVDR and CDx is a regulatory challenge in the EU, requiring re-assessment of in vitro diagnostic medical devices (IVD) in terms of their CDx designation. To retrospectively identify IVD biomarker testing applied in clinical trials, a systematic search in the German PharmNet Clinical Trials database was developed. In total 3643 clinical trials conducted between 2004 and 2022 were identified. The results were analyzed in terms of medicinal products, biomarkers, and IVDs. Patient stratification based on biomarker testing mainly takes place in oncology-related trials, and the biomarkers most frequently tested are PD-L1 and HER2. Furthermore, there is a significant overlap between the collected data and non-European national authorities that have already implemented the CDx concept. This analysis could be indicatory of the medicinal products and corresponding IVD tests that could be CDx candidates under the IVDR.

Changes in cholesterol absorption and cholesterol synthesis caused by ezetimibe and/or simvastatin in men.

This study evaluates changes in cholesterol balance in hypercholesterolemic subjects following treatment with an inhibitor of cholesterol absorption or cholesterol synthesis or coadministration of both agents. This was a randomized, double blind, placebo-controlled, four-period crossover study to evaluate the effects of coadministering 10 mg ezetimibe with 20 mg simvastatin (ezetimibe/simvastatin) on cholesterol absorption and synthesis relative to either drug alone or placebo in 41 subjects. Each treatment period lasted 7 weeks. Ezetimibe and ezetimibe/simvastatin decreased fractional cholesterol absorption by 65% and 59%, respectively (P < 0.001 for both relative to placebo). Simvastatin did not significantly affect cholesterol absorption. Ezetimibe and ezetimibe/simvastatin increased fecal sterol excretion (corrected for dietary cholesterol), which also represents net steady state cholesterol synthesis, by 109% and 79%, respectively (P < 0.001). Ezetimibe, simvastatin, and ezetimibe/simvastatin decreased plasma LDL-cholesterol by 20, 38, and 55%, respectively. The coadministered therapy was well tolerated. The decreases in net cholesterol synthesis and increased fecal sterol excretion yielded nearly additive reductions in LDL-cholesterol for the coadministration of ezetimibe and simvastatin.

Nevirapine pharmacokinetics in HIV-infected and HIV/HCV-coinfected individuals.

OBJECTIVES: An increased risk of drug-related liver injury has been repeatedly reported in individuals infected with hepatitis C virus (HCV) receiving the antiretroviral drug nevirapine. This study was undertaken to assess the differences in the pharmacokinetics of nevirapine between patients with HIV/HCV coinfection and HIV infection that could explain higher rates of hepatotoxicity. METHODS: A 12 h pharmacokinetic analysis was performed in 18 patients: 7 HIV/HCV-coinfected and 11 HIV-monoinfected. Advanced liver disease was an exclusion criterion in order to assess the impact of chronic HCV infection alone. RESULTS: Comparing the two groups, no difference was observed between minimum and maximum drug levels or total drug exposure in terms of area under the curve. CONCLUSIONS: Hepatitis C coinfection does not alter the pharmacokinetics of nevirapine in patients with preserved liver function.

The value of surrogate markers to monitor cholesterol absorption, synthesis and bioconversion to bile acids under lipid lowering therapies.

INTRODUCTION: Regulation of cholesterol (Chol) homeostasis is controlled by three main fluxes, i.e. intestinal absorption, de novo synthesis (ChS) and catabolism, predominantly as bile acid synthesis (BAS). High serum total Chol and LDL-Chol concentrations in particular are considered risk factors and markers for the development of atherosclerosis. Pharmaceutical treatments to lower serum Chol have focused on reducing absorption or ChS and increasing BAS. Monitoring of these three parameters is complex involving isotope techniques, cholesterol balance experiments and advanced mass spectrometry based analysis methods. Surrogate markers were explored that require only one single fasting blood sample collection. These markers were validated in specific, mostly physiological conditions and during statin treatment to inhibit ChS. They were also applied under cholesterol absorption restriction, but were not validated in this condition. We retrospectively evaluated the use of serum campesterol (Camp), sitosterol (Sit) and cholestanol (Cholol) as markers for cholesterol absorption, lathosterol (Lath) as marker for ChS and 7α-hydroxycholesterol (7α-OH-Ch) and 27-hydroxycholesterol (27-OH-Ch) as markers for BAS under conditions of Chol absorption restriction. Additionally, their values were corrected for Chol concentration (R_sterol or oxysterols). METHODS: Thirty-seven healthy male omnivore subjects were studied under treatments with placebo (PLAC), ezetimibe (EZE) to inhibit cholesterol absorption, simvastatin (SIMVA) to reduce cholesterol synthesis and a combination of both (EZE+SIMVA). Results were compared to those obtained in 18 pure vegetarian subjects (vegans) whose dietary Chol intake is extremely low. Relative or fractional Chol absorption (FrChA) was measured with the continuous feeding stable isotope procedure, ChS and BAS with the cholesterol balance method. The daily Chol intake (DICh) was inventoried and the daily Chol absorption (DACh) calculated. RESULTS: Monitoring cholesterol absorption, R_Camp, R_Sit and R_Cholol responded sensitively to changes in FrChA. R_Camp correlated well with FrChA in all omnivore treatment groups and in the vegan group. R_Camp confirmed reduced FrChA under EZE treatment and reduced DACh in the vegan subjects. R_Sit and R_Cholol did not accurately reflect FrChA or DACh in all situations. Monitoring endogenous cholesterol synthesis, R_Lath correlated with ChS in the vegan group, but in none of the omnivore treatment groups. R_Lath confirmed increased ChS under EZE treatment and was reduced under SIMVA treatment, while ChS was not. An increased ChS under EZE+SIMVA treatment could not be confirmed with R_Lath. R_Lath responded very insensitively to a change in ChS. Monitoring BAS, R_7α-OH-Ch but not R_27-OH-Ch correlated with BAS during PLAC, EZE and SIMVA treatments. In line with BAS, R_7α-OH-Ch did not differ in any of the omnivore treatment groups. R_7α-OH-Ch responded insensitively to a change in BAS. CONCLUSIONS: Under Chol absorption restriction, serum R_Camp is a sensitive and valid marker to monitor FrChA in a population with a normal DICh. Also, major changes in DACh can be detected in vegans. Serum R_Lath does not reflect ChS measured with the cholesterol balance method during EZE treatment. This result initiates the question whether the measured ChS reflects pure de novo synthesis. Serum R_7α-OH-Ch appears to be a valid but insensitive marker for BAS.

Intestinal expression of P-glycoprotein (ABCB1), multidrug resistance associated protein 2 (ABCC2), and uridine diphosphate-glucuronosyltransferase 1A1 predicts the disposition and modulates the effects of the cholesterol absorption inhibitor ezetimibe in humans.

BACKGROUND AND AIMS: Ezetimibe is an inhibitor of the cholesterol uptake transporter Niemann-Pick C1-like protein (NPC1L1). Target concentrations can be influenced by intestinal uridine diphosphate-glucuronosyltransferases (UGTs) and the efflux transporters P-glycoprotein (P-gp) (ABCB1) and multidrug resistance associated protein 2 (MRP2) (ABCC2). This study evaluates the contribution of these factors to the disposition and cholesterol-lowering effect of ezetimibe before and after induction of UGT1A1, P-gp, and MRP2 with rifampin (INN, rifampicin). METHODS: Serum concentrations of ezetimibe, as well as its glucuronide, and the plant sterols campesterol and sitosterol (surrogate for cholesterol absorption) were studied in 12 healthy subjects before and after rifampin comedication. In parallel, duodenal expression of UGT1A1, P-gp, MRP2, and NPC1L1 was quantified by use of real-time reverse transcriptase-polymerase chain reaction and quantitative immunohistochemical evaluation. The affinity of ezetimibe and its glucuronide to P-gp and MRP2 was assessed in P-gp- overexpressing Madin-Darby canine kidney II cells and P-gp-containing or MRP2-containing inside-out vesicles. RESULTS: Up-regulation of intestinal P-gp, MRP2, and UGT1A1 (but not of NPC1L1) by rifampin was associated with markedly decreased areas under the curve of ezetimibe and its glucuronide (116 +/- 78.1 ng.h/mL versus 49.9 +/- 31.0 ng.h/mL and 635 +/- 302 ng.h/mL versus 225 +/- 86.4 ng.h/mL, respectively; both P = .002) and increased intestinal clearances (2400 +/- 1560 mL/min versus 5500 +/- 4610 mL/min [P = .003] and 76.6 +/- 113 mL/min versus 316 +/- 457 mL/min [P = .010], respectively) and nearly abolished sterol-lowering effects. Intestinal expression of UGT1A1, ABCB1, and ABCC2 was inversely correlated with the effects of ezetimibe on plant sterol serum concentrations. Parallel in vitro studies confirmed that ezetimibe glucuronide is a high-affinity substrate of MRP2 and has a low affinity to P-gp whereas ezetimibe interacts with P-gp and MRP2. CONCLUSIONS: The disposition and sterol-lowering effects of ezetimibe are modified by metabolic degradation of the drug via intestinal UGT1A1 and either intestinal or hepatic secretion (or both) via P-gp and MRP2.

Sterol transporters: targets of natural sterols and new lipid lowering drugs.

Recent insights in the role of ATP-binding cassette (ABC) transporters ABCG5 and ABCG8, the discovery of ezetimibe, the first approved direct cholesterol absorption inhibitor, as well as the identification of Niemann-Pick C1 Like 1 (NPC1L1) protein as sterol transporter in the gut, focused attention on sterol transport processes in the small intestine and the liver. The identification of defective structures in the ABCG5 or ABCG8 transporters in patients with the rare disease of sitosterolemia elucidated their role as sterol efflux pumps regulating at least in parts the intestinal sterol absorption and the hepatic sterol output. ABCG5 and ABCG8 themselves are regulated by cholesterol via liver X receptors (LXRs), which are also activated by oxysterols and some derivatives of plant sterols. NPC1L1 could recently be identified as a major sterol transporter for the intestinal uptake of cholesterol as well as plant sterols. Studies in NPC1L1 knockout mice indicate that this transporter is essential for the intestinal uptake of sterols and that NPC1L1 might also be involved in the mechanism of action of ezetimibe. However, studies with photoreactive cholesterol as well as with photoreactive ezetimibe analogues suggest that other processes might also be involved in the mechanism of action of ezetimibe.