The effect of the pyridyl nitrogen position in pyridylpiperazine sigma ligands.

A series of pyridylpiperazines was synthesized and analyzed for sigma receptor binding affinity to determine the optimal pyridyl nitrogen position and chain length for the sigma(1) and sigma(2) receptor recognition. The (3-pyridyl)piperazines and (4-pyridyl)piperazines favor sigma(1) receptors, while previously studied (2-pyridyl)piperazines favor sigma(2) receptors.

Challenges in the Development of Drug/Device and Biologic/Device Combination Products in the United States and European Union: A Summary From the 2013 DIA Meeting on Combination Products.

Compared with single-entity treatments, multientity or combination products have the potential to provide enhanced therapeutic utility. Because they involve components that would normally be overseen by different branches of health authorities (eg, different FDA centers), they raise numerous scientific, regulatory, policy, and review management challenges. This article summarizes the current status of the evolving combination product development landscape and potential options to address key challenges facing combination product developers. Continued collaboration and transparency among regulators, combination product developers, and other stakeholders is essential to streamlining the global combination product development and review process to ensure the availability of high-quality new products that are being used in a way that is safe and effective.

Current Trends in Personalized Medicine and Companion Diagnostics: A Summary From the DIA Meeting on Personalized Medicine and Companion Diagnostics.

Personalized medicine has reached the mainstream, accounting for more new drug approvals and a promising pipeline of candidate therapeutics. Recent advances in genomics, computational biology, medical imaging, diagnostic technologies, and translational medicine are creating the possibility for scientists to develop diagnostic tools and new treatments for cancer, genetic disorders, and infectious diseases that may be particularly effective in biomarker-defined subpopulations. Drug development under this model creates new challenges that will require the need for increased regulatory flexibility, novel clinical trial designs, and translational science development. In this review, the authors highlight key developmental and regulatory challenges in the advancement of personalized medicines and their associated companion diagnostics with the need for innovative clinical trial designs to support drug/diagnostic development and registration. Further, the clinical complexities of implementing new technologies are considered, such as high-throughput next-generation sequencing in personalized medicine, and offer a glimpse of the regulatory and policy considerations shaping this methodology in multimarker diagnostic development.