Dissolving Microneedles for Allegen Skin Testing and ......Thermal Imaging Modification of MNs In...
Transcript of Dissolving Microneedles for Allegen Skin Testing and ......Thermal Imaging Modification of MNs In...
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iFarm Presentation Dissolving Microneedles for Allergen Skin
Testing and Immunotherapy
Jan 14th, 2014 Team 4: Robert Boescke, Kayam Chak, Aryaman Shalizi,
JinFeng Shen, Don-Hong Wang
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Food Allergy Food Allergy Market Analysis: • Top food allergens: milk, eggs, peanuts, tree nuts, fish, shellfish, soy, and wheat. • Even small amounts of food allergen can cause a reaction or death (anaphylaxis).
• No proven cure. • 30% of Americans think they have food allergy
• Reality: 8% of children, < 5% of adults • 9 million adults & 6 million children in U.S. • 2010: $408M spent on allergy testing globally.
• Phadia dominates the market: EBITDA $149M
Jeanette’s healthy living
Sources: U.S. Census Bureau.State and County QuickFacts. 2010. The prevalence, severity, and distribution of childhood food allergy in the United States. J Pediatr.2011. Centers for Disease Control and Prevention 2013.
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Sources: U.S. Dept. OF Health and Human Services CDC, NCHS, National Health Interview Food Allergy Among U.S. Children. 2007
• Young children are unable to recognize food they are allergic to: • Food allergy rates increased significantly among both preschool-aged and older
children from 1997 to 2007. • Hospitalizations with diagnoses related to food allergy have increased among children
from 1998 to 2006. • Cost for children’s food allergy: $25 billion per year.
Children with food allergy are at higher risk for other conditions
Food Allergy in Children %
of r
epor
ted
food
/dig
estiv
e al
lerg
y
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• Skin: rash, angioedema (hives)
•Eyes: conjuctival injection, periorbital edema
• Lung: sneezing, bronchoconstriction
•Gastrointestinal tract: abdominal pain, vomiting, diarrhea
Allergic Symptoms
Specific IgE 9 allergenic peanut
proteins
Immunoassays Skin Prick Test Oral Food Challenge
Diagnosis of Peanut Allergy
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• Test results do not reflect the severity of allergy • Diagnostic tools needed to help predict reaction
severity!
Diagnosis of Peanut Allergy
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Severity and persistence correlates to the number of epitopes
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Microneedles (MNs)
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Severity and persistence correlates to the number of epitopes
Peptide microneedle skin testing gives the answer clinically in < 5 min
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Dissolving PVP-Microneedles
• Made of FDA GRAS polymer (poly vinyl-pyrrolidone) • Dissolves upon penetrating skin
Instantly to Days (depends on amount of polymerization)
• Allows controlled delivery of allergens
PDMS Mold
Drying
Peeling
Vacuum
Allergen proteins + PVP
Micro dispensing of PVP/protein solution into needle domains
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Characterization of PVP-MNs
Casein MN
Peanut MN Integrity of Proteins
% o
f Act
ive
SA
Rhodamine –Casein MN
Distribution of Proteins
Microneedle Structure
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Penetration of MNs
PVP
case
in M
N
Stee
l cas
ein
MN
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Potential applications of microneedles
• Excellent intradermal delivery system 1. Vaccines 2. Tumor antigens 3. Drugs Proteins Antibodies Chemical compounds DNA/RNA
Potential Applications of MNs
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Published in: Marija Zaric; Oksana Lyubomska; Olivier Touzelet; Candice Poux; Sharifah Al-Zahrani; Francois Fay; Leah Wallace; Dorothea Terhorst; Bernard Malissen; Sandrine Henri; Ultan F. Power; Christopher J. Scott; Ryan F. Donnelly; Adrien Kissenpfennig; ACS Nano 2013, 7, 2042-2055. DOI: 10.1021/nn304235j Copyright © 2013 American Chemical Society
Microneedle can be used for vaccination MNs for Vaccination
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Comparison of a microneedle tuberculosis test and a traditional test administered with hypodermic needle. The lower images show needle-depth problems that can occur with the conventional test.
Microneedle can be used to administer TB test MNs for TB Test
Marco Rolandi, U of Washington
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MN Commercialization Milestones
TIMELINE Dissolving MNs Preclinical
Fabrication Formulation Characterization
Biocompatibility Toxicity
Clinical Validation
Thermal Imaging
Modification of MNs In vitro Proof-of-Concept (Mast cell activation) Thermal Imaging
iFarm Program
Evaluation Meeting Inventors Patent Landscape Competitors
BLA Submission
Patent Application Seed Fund STARTUP!!!
License out GMP microneedles GMP peptides
MARKET
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• 5 existing patents may overlap with our technology.
• Additional patent applications may have filing precedence over our application.
• 1 existing patent covers a combined imaging and allergen testing system.
• Patent holders range in size from angel- backed startup to major multinational consumer-goods companies.
Existing Patent Landscape
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Nature of competing technologies • All competing technologies are
based on high-aspect-ratio microneedle or microknife arrays.
• Competing technologies utilize inorganic substrates.
• Competing technologies are based on photolithographic or micro-etching methods.
• Competing technologies have limited biodegradability.
US pat. No. 8506530, 7942827
Etched MN array
Needle array + Imaging system
Nature of Competing Technologies
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• Transderm Inc: Dissolvable microneedle arrays for nucleic acid delievery.
• Corium- MicroCor®: Biodegradable microstructure patches for delivery of proteins, peptides and vaccine.
• Circassia- MicronJet™: A silica-based microneedle system, already approved for use in U.S. and Europe.
Competitors
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Our technology • Simple organic synthesis at
room temperature. • Rapidly biodegradable. • Direct synthesis of array
substrate with allergen.
Competing technologies • Complex synthesis using
photolithograpy or micro-etching
• Variable levels of biodegradability
• Allergen must be added to machined substrate at separate step.
Comparison of Competing MN Technologies
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• Outreach: Discuss technology with people in the allergy field.
• Visit different allergists who treat adults and children. • What is the greatest unmet need in the allergy field?
• Research: Look into more details into the field of allergy research.
• How can allergy products have been broken down to individual components?
• Business: Steps necessary to bring this technology into the market.
• Write a business proposal. • Focus on a specific allergy that can create the most value
for the company.
Future Directions Future Directions
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Aryaman Shalizi, Ph.D. JinFeng Sheng , Ph.D.
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Acknowledgments
Manish Butte M.D. Ph.D.
Jayakumar Rajdas Ph.D.
Inventors
Stanford Office of Technology Licensing: • Luis Mejia • Rick Gibb • Serena Hanes Mentor: Richard Garber
iFarm Program
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Questions?
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Food Allergy Market
• 2010: $408M spent on allergy testing globally • Phadia dominates market. EBITDA $149M on
revenues of $190M • Additionally, US spends $118M / yr on allergy
doctor visits, $45M on ED visits, $203M on other doctor visits for allergies
• 30% of Americans think they have food allergy – Really: 8% of children, < 5% of adults
• Per test cost currently, $0.50
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• $408M spent on allergy testing • $4B spent on allergy foods • $7 b in US • 8% children have true food allergy • Anaphylaxis • due to food allergy results in over 20,000 hospital visits and 100–
200 deaths per year. • Gold standard: Doubleblind placebo controlled food
challenge(DBPCFC) Difficult/dangerous • the skin prick testing (SPT; limited to only 30 allergens) and serum
IgE testing (false results); can’t tell about severity.
Diagnosis of Peanut Allergy
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Why use this technology?
• WHO estimate the cost of conventional needle administration in Africa is around $25 per administration due to the unsafe practice that causes needle-stick injuries.
• In United States, needle-stick injuries cost around $591million in 2010
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SPARK Plan
Aim 1: Fabricate microneedles Aim 2: Examine the biocompatibility and
toxicity in rats Aim 3: Develop thermal imaging Aim 4: Clinical validation in allergic
patients
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Development Plan
GMP microneedles GMP peptides FDA: BLA approval for skin testing reagents Start up company or License Potential licensees: DBV Technologies, Allermed Laboratories
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0 sec 30 sec 60 sec 90 sec
Thermal imaging allows rapid identification of reactions