Cambridge Healthtech Institute 第4回

Blood-Brain Barrier and CNS Drug Discovery
( 血液脳関門と中枢神経系疾患治療薬の創薬 )

中枢神経系疾患治療薬の創薬にまつわる障害に対処するための戦略とツール

2019年4月12日

 

血液脳関門 (BBB) は、脳内の恒常性を維持するうえで重要な役割を担っており、その機能が非常に優れているため、医薬品の開発に携わっている研究者は、脳腫瘍や神経変性疾患など、生死に関わる深刻な病気を治療するため薬剤を脳内に送達するという課題と格闘し続けています。しかし、健康体と病体の脳におけるBBBの状態に関する研究が進んだことで、脳透過性分子の設計と研究を後押しする新たな戦略や手法、ツールが開発されるようになっています。血液脳関門と中枢神経系疾患治療薬の創薬をテーマにしたこのシンポジウムでは、創薬に携わっている研究者が一堂に会し、脳透過性分子や新たな薬剤送達法の設計に向けた研究の進捗状況など、この分野の動向について議論します。


Final Agenda

Friday, April 12

7:30 am Registration Open and Morning Coffee

BBBと創薬への影響に関する研究成果

7:55 Welcome and Opening Remarks

Kaitlin Kelleher, Conference Director, Cambridge Healthtech Institute

Zoran Rankovic, PhD, Director, Chemistry Centers, Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital

8:00 FEATURED PRESENTATION: The BBB and Its Effect on Drug Delivery in Different Disease States

Quentin Smith, PhD, Senior Vice President, Research, Texas Tech University Health Sciences Center

 

8:30 How Does the Basement Membrane Regulate BBB Integrity in Physiological and Pathological Conditions?

Yao Yao, PhD, Assistant Professor, Pharmaceutical and Biomedical Sciences, University of Georgia

Although the blood brain barrier (BBB) attracts lots of attention, most research focuses on its cellular constituents, leaving its non-cellular component - the basement membrane (BM) - understudied. Recent studies show that the BM not only actively regulates BBB integrity, it also serves as the rate-limiting step in inflammatory cell extravasation. In this talk, I will discuss the biological function of the BM in BBB maintenance under both physiological and pathological conditions.

9:00 Networking Coffee Break

9:30 Fibrinogen in Neurological Diseases: Mechanisms, Imaging, Therapeutics

Katerina Akassoglou, PhD, Senior Investigator/Professor, Department of Neurology, Gladstone Institutes/University of California, San Francisco

Recent research has uncovered pleiotropic roles for fibrinogen in neuroinflammation, neurodegeneration, and inhibition of repair. Fibrin-targeting immunotherapy inhibits autoimmunity- and amyloid-driven neurotoxicity in animal models of multiple sclerosis and Alzheimer’s disease, suggesting selective fibrin targeting might be beneficial for suppressing vascular-driven neurodegeneration.

10:00 BBB Organoids: A Next Generation in vitro Drug Screening Platform

Choi-Fong Cho, PhD, Instructor, Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School

Techniques to model the BBB in vitro are crucial tools to help predict brain uptake of drug candidates prior to in vivo studies. We describe here the utility of 3D multicellular BBB spheroids made of human brain endothelial cells (ECs), pericytes and astrocytes as a screening tool for brain-penetrating agents.

10:30 Theory and Practice of CNS Drug Design

Zoran Rankovic, PhD, Director, Chemistry Centers, Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital

Designing molecules that can overcome the blood-brain barrier and achieve optimal concentration at the desired therapeutic target in the brain is a specific and major challenge for medicinal chemists working in CNS drug discovery. Here we report experimental data analysis and case studies to illustrate the modern CNS pharmacokinetic concepts, drug discovery workflows and medicinal chemistry strategies for designing molecules with optimal brain exposure.

11:00 Sponsored Presentation (Opportunity Available)

11:15 Luncheon Presentation (Sponsorship Opportunity Available) or Enjoy Lunch on Your Own

12:00 pm Session Break

BBBと中枢神経系の透過性を有する阻害剤およびドラッグデリバリーのためのプラットフォーム

1:00 Chairperson’s Remarks

Yao Yao, PhD, Assistant Professor, Pharmaceutical and Biomedical Sciences, University of Georgia

1:05 Identification of the Potent, Brain-Penetrant p70S6K/Akt Inhibitor M2698, a Novel Dual Inhibitor of the PI3K/Akt/mTOR Pathway

Speaker to be Announced, Merck

1:35 Discovery and Early Clinical Development of LY3202626, a Low-Dose, CNS-Penetrant BACE Inhibitor

Dustin Mergott, Senior Research Advisor, Group Leader, Discovery Chemistry Research & Technologies, Eli Lilly

Cerebral deposition of amyloid-β peptide (Aβ) plays a critical role in Alzheimer’s disease (AD) pathogenesis. Owing to its role in the generation of Aβ, the BACE1 enzyme has been a prime target for designing drugs to prevent or treat AD. However, BACE1 has proven to be an exceedingly challenging target for drug discovery, especially due to the requirement for CNS penetration. This presentation will describe the discovery of LY3202626, a low-dose, CNS-penetrant BACE inhibitor capable of reducing CSF Aβ by > 90%.

2:05 Sponsored Presentation(Opportunity Available)

2:35 Networking Refreshment Break

3:05 A Roadmap for PI3Kγ Selectivity Design: Discovery of Orally Bioavailable, CNS-Penetrant PI3Kγ Inhibitors with Potential for the Treatment of Multiple Sclerosis

Philip Collier, PhD, Senior Research Scientist, Medicinal Chemistry, Vertex Pharmaceuticals, Inc.

We describe the evolution of a reported pan-PI3K inhibitor into a family of potent and selective inhibitors. Guided by structural data, our scaffold design strategy resulted in compounds devoid of efflux liabilities. Further optimization led to the discovery of a CNS-penetrant, orally bioavailable compound that showed efficacy in a preclinical model of MS.

3:35 Optimization of a Phenotypic Screening Hit in Yeast and the Identification of a Novel Target with the Potential to Treat Parkinson’s Disease

Matthew Lucas, PhD, Senior Director of Chemistry, Medicinal Chemistry, Yumanity Therapeutics

The discovery, design, and phenotype-led optimization of the scaffold that resulted in the discovery of a novel target that plays an important and previously unrecognized role in the neurotoxicity caused by a-synuclein will be described. The a-Synuclein protein is a major driver of Parkinson’s disease and related neurodegenerative disorders. Misfolding and aggregation of a-synuclein triggers a cascade of events, ultimately resulting in neurotoxicity.

4:05 A Versatile and Modular Targeted Nanoparticle Platform for Delivery of Combination Therapies to Adult and Pediatric CNS Tumors

Fred Chiu-lai Lam, MD, PhD, Research Scientist, Biology, Koch Institute for Integrative Cancer Research at MIT

We developed transferrin-functionalized nanoparticles (Tf-NPs) that can deliver combination therapies across the BBB to CNS tumors. Treatment of GBM mouse models with drug-loaded Tf-NPs enhances survival and decreases systemic drug toxicities, demonstrating the potential of this nanoscale platform for treatment of CNS tumors.

4:35 Close of Conference

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