Cystic Fibrosis Drug Discovery and Development: More Than ... · Christopher Penland, Ph.D. Vice...
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Cystic Fibrosis Drug Discovery and Development: More Than Venture Philanthropy
Christopher Penland, Ph.D.Vice President of BioPharma Programs
Cystic Fibrosis Foundation
September 27, 2016 1
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To advance drug development and a search for a cure, Cystic Fibrosis Foundation Therapeutics has contractual agreements with several companies to receive royalties related to drugs that are developed as a result of CFFT funding. Any royalties we receive are used in support of our mission.
The Legal Stuff First
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Cystic Fibrosis Organ Involvement
• Recessive genetic disease
• Multiorgan involvement (sinus, lungs, pancreas, liver, intestinal tract, skin, reproductive tract, skeletal system)
• Morbidity and mortality today primarily linked to progressive loss of lung function
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Welsh, MJ and AE Smith. Scientific American. 1995
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CFTR Gene, Protein and Mutations
• hCFTR encodes a 1480 aa ATP binding cassette transporter (2 transmembrane domains, 2 nucleotide binding domains) that differs from other members of the ABC family by the presence of a cytosolicregulatory domain.
• CFTR is a ATP, PKA‐activated anion channel. Permeability I‐>Cl‐>>HCO3‐.
• >1000 described mutations in hCFTR gene.
• Most prevalent mutation worldwide is loss of phenyalanine at position 508 (F508del CFTR).
• Genotype‐phenotype relationship variable among target tissues (vas deferens > pancreas >> lung) suggesting likelihood of environmental and genetic modifiers.
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CFTR “Broad” Mutation Classification
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Zielenski, J & Tsui LC. Annu Rev Genet. 1995.
* Some mutations exert multiple negative effects (e.g., F508del – processing and regulation)
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Electrophysiological Impact of Mutations on CFTR Protein Function
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Cl‐Cl‐
Cl‐Cl‐Cl‐
Cl‐
Cl‐
Non‐CF HBE
Cl‐Cl‐
Cl‐Cl‐Cl‐
Cl‐
Cl‐
CF HBE
airway lumen airway lumen
ASL
7 m <7 m
I N x Po x gCl
G551D CFTR
F508del CFTR
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Discovery and Development of CFTR Modulators
VX‐770 and VX‐809 structures
VX‐770 augments (G551D, F508del and wt) membrane resident CFTR open channel probability. VX‐809 rescues membrane trafficking of F508del CFTR
Restoration of channel function is reflected in tissue level function. VX‐809 effect magnified by VX‐770 co‐administration.
September 27, 2016 7Van Goor F et al. PNAS. 2009.Van Goor F et al. PNAS. 2011.
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Ramsey, BW et al. N Engl J Med. 2011
Phase 3 Clinical Trial Results of Ivacaftor(VX‐770)
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Phase 3 Clinical Trial Results of Lumacaftor+ Ivacaftor (VX‐809 + VX‐770)
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1. Significant increases in FEV1 and BMI2. Decreases in hospitalizations and
need for IV antibiotics
Figures courtesy of Michael Boyle, MD
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How to derisk pharmaceutical company involvement in an orphan disease?
Basic Tenets of Venture Philanthropy1:• Tailored financing• Multi‐year support• Performance measurement• Engagement• Organizational capacity building
Additional measures we’ve chosen to take:• Non‐monetary assistance• Clinical Trial Infrastructure• Patient Education
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1https://webgate.ec.europa.eu/socialinnovationeurope/en/magazine/finance/articles‐reports/venture‐philanthropy‐defined2http://ssir.org/articles/entry/when_innovation_goes_wrong
Impact = Innovation + Scale2
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CFTR Toolbox• CFTR functional and mechanistic assays• Access to non‐commercial resources
• CFTR modulator panel• CFTR antibodies• CF human airway epithelia
• Independent testing• CFFTI lab• Chantest – a division of Charles River
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Documenting Disease Liability of CFTR Variants
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http://cftr2.org/index.php
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Cystic Fibrosis Foundation’s Therapeutics Development Network
• $12.8 M in FY2015• 82 Research Sites• 150 Investigators• 330+ Research Coordinators• Independent DSMB
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• Mike Boyle, MD• George Retsch‐
Bogart, MD• Chris Goss, MD
• Nicole Hamblett• Joe Pilewski, MD• JP Clancy, MD• Jill Van Dalfsen
TDN Leadership Team
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Expanding Clinical Trial Numbers
0
5
10
15
20
25
30
35
40
Studies in Start-Up Total Studies
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Num
ber o
f Tria
ls in TDN
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Clinical Trial Participation Requirements
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Percentage of Center Population Newly Enrolled in Interventional Studies By Trial Site (mid‐2016)
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Clinical Trial Participation: Education and Facilitation
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https://www.cff.org/Trials/finder
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https://www.cff.org/Trials/pipeline
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Thank You
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