FDA Advances Efficient Approaches to Designing and Conducting Cancer Clinical Trials

By: Richard Pazdur, M.D.

Over the past decade, advances in understanding of cancer biology have led to the development of targeted treatments that are more effective than the chemotherapies of the past century. These therapies are demonstrating response rates large in magnitude or response durations prolonged in early trials, or both. Patient demand to enter these trials has increased, and so have calls to expedite the drug development and approval processes, all while maintaining high standards for safety and efficacy. We never lose sight of our dedication to patients faced with a life-threatening disease and to making progress in the fight against cancer.

Dr. Richard PazdurThe FDA works with industry, researchers, and other stakeholders developing innovative cancer therapies. We must ensure clear understanding of our latest thinking on how clinical trials can be efficiently and effectively designed to demonstrate a cancer therapy’s safety and efficacy.

Last week, the FDA published a draft guidance to help advance effective and innovative clinical trial designs early in drug development to help bring new cancer therapies to patients as quickly as possible. Below is a quick summary of this guidance:

Draft Guidance for Industry – Use of Expansion Cohorts in First-In-Human Clinical Trials to Expedite Development of Cancer Drugs and Biologics

Traditionally, clinical trials have been conducted in phases with one or two main objectives per study. For example, phase 1 studies help determine safety and the dose range for exploration in future trials, while phase 2 studies provide preliminary evidence of safety and activity in a single setting. This latest guidance, Use of Expansion Cohorts in First-In-Human Clinical Trials to Expedite Development of Cancer Drugs and Biologics, provides advice on designing and conducting adaptive trial designs in which pharmaceutical companies and researchers can assess many different aspects of a drug in development in a single clinical trial while enrolling the minimum number of study participants necessary to obtain this information. Trials with multiple expansion cohorts can be inherently more efficient and expedite early drug development. They can allow for addressing multiple questions in a single trial that is amended as new objectives are identified, avoiding the time lag and additional resources experienced with the opening of new clinical trials.

The principal advantage of expansion cohort trials is efficiency in drug development, with the goal of making highly effective drugs widely available to the public as quickly as possible. Well-designed and well-conducted clinical trials help ensure patient safety while also obtaining quality data that may support drug approval. This new draft guidance describes our proactive steps to help industry design clinical trials for today’s highly complex cancer therapies—and to conduct these trials in cost-effective and timely ways.

Maintaining Progress

From 1990 through 2014, the overall cancer death rate in the United States fell by 25 percent. In 2014, the number of people living beyond a cancer diagnosis reached 14.5 million, and by 2024, is expected to climb to approximately 19 million. In 2017, the FDA approved 16 new cancer drugs and biologics, including the first two in an exciting new category called CAR-T cell therapy. We also approved 30 new indications (uses) for existing cancer drugs and biologics, and the first two biosimilars indicated to treat cancers. Additionally, we recently approved the first cancer treatment based on a genetic feature of a cancer rather than the location of the body where the tumor originated.

The new draft guidance is intended to help the drug development community continue this progress against cancer. We want your input to make sure that the final guidance is comprehensive and forward looking and adapts to rapidly changing research developments and technologies. Our regulatory work needs to remain as advanced as the many new cancer therapies currently working their way through development. We encourage stakeholders to comment and look forward to your valuable feedback.

Richard Pazdur, M.D., is Director, FDA Oncology Center of Excellence

Advancing Tobacco Regulation to Protect Children and Families: Updates and New Initiatives from the FDA on the Anniversary of the Tobacco Control Act and FDA’s Comprehensive Plan for Nicotine

By: Scott Gottlieb, M.D., and Mitch Zeller, J.D.

This summer marks nine years since the Family Smoking Prevention and Tobacco Control Act (TCA) was signed into law, and one year since we announced the FDA’s Comprehensive Plan for Tobacco and Nicotine Regulation. This comprehensive plan places nicotine, and the issue of addiction, at the center of the agency’s tobacco regulation efforts. The multi-year roadmap provides a framework for regulating nicotine and tobacco and is designed to reframe the conversation around nicotine and harm reduction.

A principal reason people continue to smoke cigarettes — despite the dangers — is nicotine. Our plan recognizes that nicotine isn’t directly responsible for the morbidity and mortality from tobacco, but creates and sustains addiction to cigarettes. It’s the delivery mechanism for nicotine that’s more directly linked to the product’s dangers. That’s why our plan focuses on minimizing addiction to the most harmful products while encouraging innovation in those products that could provide adult smokers access to nicotine without the harmful consequences of combustion and cigarettes.

Dr. Scott Gottlieb, Commissioner of the U.S. Food and Drug Administration

Scott Gottlieb, M.D., Commissioner of the U.S. Food and Drug Administration

Over the past year, we’ve taken important steps toward fully implementing this plan as part of our overarching goal: a world where cigarettes can no longer create or sustain addiction, and where adults who still seek nicotine could get it from potentially less harmful sources. In implementing this comprehensive plan, we’ve already issued three important advance notices of proposed rulemaking (ANPRMs) that have the potential to reframe the tobacco landscape. These ANPRMs focus on:

  • The potential development of a product standard to lower nicotine in cigarettes to minimally or non-addictive levels – which could make it harder for future generations to become addicted in the first place and could allow more currently addicted smokers to quit more easily or switch to potentially less harmful products. Given their combination of toxicity, addictiveness, prevalence and effect on non-users, it’s clear that to maximize the possible public health benefits of our regulatory tools granted to us under the Tobacco Control Act, we must focus our efforts on the death and disease caused by addiction to combustible cigarettes. We believe this pivotal public health step has the potential to dramatically reduce smoking rates and save millions of lives;
  • The role that flavors – including menthol – play in initiation, use and cessation of tobacco products. Input on these issues will assist in the consideration of the most impactful regulatory options the FDA could pursue to achieve the greatest public health benefit. We’re proceeding in a science-based fashion, building a strong administrative record by securing more information about the potential positives and negatives of flavors in both youth initiation and in getting adult smokers to quit or transition to potentially less harmful products; and,
  • The patterns of use and resulting public health impacts from what are often referred to as “premium” cigars to inform the agency’s regulatory policies.

The public comment periods for all three ANPRMs, which were extended by 30 additional days to allow more time for submissions, have now closed. We are beginning the process of reviewing those comments.

Mitch Zeller, J.D., Director of FDA's Center for Tobacco Products

Mitchell Zeller, J.D., Director of FDA’s Center for Tobacco Products

At the same time, the FDA is also pursuing additional new policies as part of our comprehensive plan as well as our ongoing commitment to improve the efficiency and effectiveness of our tobacco regulatory programs.

Part of these efforts are aimed at making the pathway for developing nicotine replacement therapy (NRT) products more efficient to promote the development of novel NRT products. The agency’s efforts to re-evaluate and modernize its approach to the development and regulation of NRT products is aimed at opening up new pathways for the development of improved products, regulated as new drugs, that demonstrate that they are safe and effective for the purpose of helping smokers quit.

Many of our new efforts, as part of our comprehensive plan, are aimed at using our existing authorities under the TCA to minimize addiction to the most harmful products, principally cigarettes, while encouraging innovation in new products that may offer adults less harmful forms of nicotine delivery.

A key part of achieving these goals is issuing foundational rules and guidances to help industry better understand what is needed to submit product applications. At the same time, we are pursuing new efforts to improve the transparency and efficiency of the premarket review process.

These important foundational steps are a key element of our efforts to advance the pre-market review of tobacco products. This review is one of the most important responsibilities we have. It’s how we can assess new products and their potential impact on the public health. This is our opportunity to determine how a product may positively or negatively affect both non-users and current users. So, it’s crucial that we continually improve in this area and have a transparent and efficient process.

To address these goals, we’re committing to a number of steps, some new, to respond to stakeholders and to make the regulatory process more efficient, predictable, and transparent for industry, while also advancing the agency’s public health mission. Establishing a rigorous, predictable, science-based framework for the premarket review of tobacco products is a key element of our program.

Among the steps that we are pursuing to better achieve these goals:

  • Proposing foundational rules: We all need to be on the same page regarding the basic “rules of the road,” especially when it comes to what’s expected in premarket applications. We’re working to propose new rules to help industry on topics including Substantial Equivalence, Premarket Tobacco Applications, Modified Risk Tobacco Product Applications, and Tobacco Product Manufacturing Practices. We will begin publishing these foundational proposed rules in the coming months. They will lay out a transparent, modern, and science-based framework for manufacturing practices and the development of tobacco product applications that meet the legal requirements.
  • Holding a public meeting on premarket review: Within the next few months, the FDA will hold a public meeting on the premarket application and review process. The goal of the meeting is to solicit comments on our processes and provide a dedicated venue for specific suggestions on how to further improve them. Potential topics for discussion include: how to achieve greater efficiencies in review, while continuing to protect public health; how to review products that are rendered “new” due to changes made to comply with a product standard; and, how to facilitate greater company consultation with the FDA prior to submitting applications.
  • Exploring opportunities for premarket review efficiencies through rulemaking and guidance and new administrative steps to modernize and improve the review process: The FDA is taking additional steps to pursue the shared interest with industry of increased flexibility and efficiencies within the application review process. If carefully developed, rulemaking and guidance efforts in this area could help ensure that our public health standards for premarket review are met while mutually benefiting both the industry and the FDA. For example, an opportunity may exist to allow for faster and cheaper development of products that will benefit public health. In the months ahead, the FDA intends to explore what improvements can be made along these lines within our existing legal authorities. We also plan to advance a comprehensive suite of improvements to the review process, as part of a Regulatory Modernization, to make our program more efficient, transparent, predictable, and efficient. We will unveil these programmatic reforms in advance of our upcoming public meeting.

These programmatic and process improvements are aimed at solidifying the FDA’s regulatory pathways and improving its predictability and transparency. As the FDA advances its regulatory approach to these important public health considerations, it’s critical that we keep in mind a bedrock principle: No kids should be using any tobacco or nicotine-containing products, including e-cigarettes.

Protecting our nation’s youth from the dangers of tobacco products is among the most important responsibilities of the FDA. That is why we recently launched our Youth Tobacco Prevention Plan.

We look at the marketplace for tobacco products today and see increasing concern from parents, educators, and health professionals about the alarming youth use of tobacco products like JUUL and other e-cigarettes. Our mission at the FDA is to protect the public’s health, and we want to assure the public we’re using all of our tools and authorities to quickly tackle this public health threat. We will not allow our efforts to give manufacturers time to file premarket applications with FDA — that are informed by the foundational rules and guidance that we’re now advancing — to become a back door for allowing products with high levels of nicotine to cause a new generation of kids to get addicted to nicotine and hooked on tobacco products.

Our Youth Tobacco Prevention Plan reflects our commitment to address these risks. Congress gave us many powerful authorities, including enforcement, product standards, premarket review, sales and promotion restrictions, and public education. We’ll use every tool available to protect our nation’s kids.

We’ve already announced several vigorous enforcement actions and education efforts aimed at addressing youth use of nicotine, and e-cigarettes in particular. More such actions are imminent. Among the steps we’ve already taken are: sending warning letters to companies for selling e-liquids resembling juice boxes, candies and cookies; sending warning letters to retailers for selling JUUL e-cigarettes to underage youth; working with eBay to remove Internet listings for JUUL, and with other e-cigarette manufacturers to help the FDA better understand the youth appeal of these products; and, creating the  first e-cigarette public education ad, with a full-scale advertising campaign to begin this fall.

These are important first steps. But we still need to do more to address use of tobacco products by kids. That’s why we’re working to quickly advance the following three new initiatives:

  • Expediting action on flavors: The issue of flavors, including flavored e-cigarettes and e-liquids, is at the forefront of any discussion of youth use. However, some flavored tobacco products may also play a role in helping some adults quit smoking cigarettes. Now that the comment period has closed, we intend to expedite the review and analysis of the comments so that we can leverage the information into policy as quickly as possible, should the science support further action.
  • Developing an e-cigarette product standard: The FDA has also begun exploring a product standard for e-cigarettes to help address existing concerns. As part of the standard, the agency will consider, among other things, levels of toxicants and impurities in propylene glycol, glycerin, and nicotine in e-liquids. While the process for establishing a product standard takes time, we recognize the urgency in setting some minimum, common sense standards, and will work to address this on an accelerated timeline.
  • Exploring ways to accelerate enforcement: We’re also looking at ways that the FDA can act even more efficiently when we become aware of violations affecting youth use of e-cigarettes, such as illegal product marketing to youth. We need to be faster and more agile when we identify new risks. We’ve also become aware of reports that some companies may be marketing new products that were introduced after the FDA’s compliance period and have not gone through premarket review. These products are being marketed both in violation of the law and outside of the FDA’s announced compliance policies. We take these reports very seriously. Companies should know that the FDA is watching and we will take swift action wherever appropriate. We are evaluating new ways to strengthen our partnership with sister agencies, including the Federal Trade Commission. We will also announce a robust series of additional enforcement actions in the coming months.

We have made great strides since we first unveiled our Comprehensive Plan for Tobacco and Nicotine Regulation last year. The components of this program we have outlined are intended to work as an integrated package of reform. We will pursue all of these policies simultaneously. Each is interconnected. Each element supports the others. We intend to achieve all of the elements.

We remain on track to meet our ambitious goals. But there is still much work to be done.

The staff at the FDA’s Center for Tobacco Products is working hard to use our available tools to protect Americans from the harms of being addicted to tobacco products. And today, we’re committing to redoubling our efforts. Too many kids are still starting to use tobacco products and getting addicted. And, too many adults are still struggling to quit or to switch to less harmful options. To reduce the disease and death caused by tobacco use, the FDA will do everything within our power to help all ages.

Scott Gottlieb, M.D., is Commissioner of the U.S. Food and Drug Administration 

Mitch Zeller, J.D., is Director of the FDA’s Center for Tobacco Products

 Follow Commissioner Gottlieb on Twitter @SGottliebFDA

Follow the FDA Center for Tobacco Products on Twitter  https://twitter.com/FDATobacco