a new technique for imaging amyloid in the heart, kidneys ...bryan whittle robin geldritch barbara...
TRANSCRIPT
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A new technique for imaging amyloid in the heart, kidneys and other organs
Jonathan Wall University of Tennessee Graduate School of Medicine
Knoxville, TN [email protected]
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Amyloidosis Research and Clinical Team at UTMC
UTMC/GSM Dr. Ron Lands Dr. “Woody” Besozzi Dr. Dustin Osborne Dr. Yitong Fu Dr. Dustin Powell Bryan Whittle Robin Geldritch Barbara Marine
Amyloid Program Dr. Steve Kennel Dr. Emily Martin Alan Stuckey Steve Foster Tina Richey Angela Williams Sallie Macy Craig Wooliver
UTMC/GSM Jennifer Ferris Dr. John Bell Dr. Rod Ramchandren Dr. Muddassir Mehmood Brett Hines Dr. Eric Heidel
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Amyloid DETECTION
Amyloid THERAPY
Measuring risk of disease PREDICTION
Amyloid Research Program: Addressing Patient Problems
Patient and Doctor EDUCATION
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Rare Disease Day at UTMC
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Amyloidosis Patient Support Group at UTMC
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Gov. Haslam signs resolution
making March
Amyloidosis Awareness
month for the state of
Tennessee
Amyloidosis Awareness Month (2018)
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How Does Amyloid Form?
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Amyloidosis – A Protein Misfolding Disorder
Amyloid protein
Amyloid fibril
Protein secretion into
the blood
Toxic to cells
Organ Damage
Tetramer - TTR
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Heart
Liver
Kidney
Nerve
Spleen
Intestines
Systemic Amyloidosis
• Eyes • Adrenal glands • Lymph nodes • Stomach
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Imaging Amyloidosis
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Why Image Systemic Amyloidosis?
• Detection of amyloid in the heart, lung, kidney, liver, and spleen (and nerve) using one agent is not currently possible.
• Imaging amyloid can provide more effective and rapid diagnosis.
• The extent of deposition may be of prognostic value and might influence treatment options – and allow physicians to monitor the effect of treatments.
• Currently only one approved method for imaging ATTR in the heart with no agents approved for other forms of amyloidosis.
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Imaging ATTR with 99mTc-PyP
normal AL - negative ATTR – positive patients
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A First-in-Human Amyloid Imaging Study
at UTMC
Not an industry-sponsored trial. Supported by donations to our program
from our researchers and patients.
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Peptide p5+14 – A Novel Agent for Amyloid Imaging
Amyloid fibril
+ + + + + +
- - - - - - -
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Patient Recruitment
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Patients Come From Central and Eastern Tennessee and Around the US
More than half the patients are Tennesseans
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First-in-Human Clinical Trial of Peptide p5+14
Phase 1
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A Very, Very Brief Introduction to Imaging
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Phase 1 Clinical Trial of 124I-p5+14 PET/CT Imaging of Patients with Systemic Amyloidosis
• Part 1 – Three patients with AL given radioactive p5+14 peptide for initial evaluation of safety. Patients were imaged 7 times over 48 h – COMPLETED.
•Part 2 – Forty patients: • 20 AL (6 imaged to date) • 10 ATTR (4 imaged, all hereditary) • 5 ALect2 (1 imaged) • 5 Other (1 recruited)
• Each patient receives a low dose of the peptide and low dose of radioactivity and is imaged at 5 h and 24 h post injection.
• Study is assessing safety and determining whether we can image individual organs that are known or suspected of containing amyloid based on the clinical work-up.
• Patients receive copies of their images as part of the study.
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Imaging Protocol
• Patients visit our Study Physician for a check up • The radioactive drug is prepared at UTMC
• The patients come to the Nuclear Medicine Dept
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Imaging Protocol
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3D PET/CT Imaging allows us to look at many views
of the patient
A Very, Very Brief Introduction to Imaging
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ATTR Patients – Diagnosed with Cardiac Amyloid
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ATTR – Diagnosed with neuropathy
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Peripheral nerve amyloid
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ATTR Patient
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ATTR Cardiac Amyloid Images
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ATTR Patients
We continue to study the images from all the patients to understand how the peptide works and what it can “see” but
the images suggest that it may be possible to see nerve-associated ATTR
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ALECT2 Amyloidosis
Dr. Chris Larsen, Arkana Laboratories
• ALECT2 amyloidosis is the third most common form of systemic amyloidosis in the US.
• Common in people of Mexican descent with most patients in the Southwest US.
• Amyloid deposits most commonly found in the kidneys, liver, and spleen.
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ALECT2
Spleen Kidneys Adrenal
Spleen Kidneys
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Imaging AL Amyloidosis
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Lung uptake
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Future Plans
• The Phase 1 study will continue to recruit for another year (or so) – after which we will extend the study and image as many patients as we can.
• Based on feedback from many of the patients that we
have imaged we hope to begin the following studies: 1. Perform repeat imaging on patients at 12 month intervals
so that we can monitor response to therapy. 2. Recruit TTR mutant carriers who are asymptomatic to see
if very early amyloid detection is possible. 3. Recruit amyloid-free “heathy” subjects. 4. Increase the availability for imaging of rare forms of
amyloidosis.
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Future Directions
• The Phase 1 study will continue to recruit for another year (or so) – after which we will extend the study and image as many patients as we can.
• We continue to work on understanding the peptide and how the images can be used to benefit patients.
• The specific reactivity of the peptide for amyloid is being further exploited to develop therapeutics designed to enhance the clearance of tissue amyloid.
• The peptide is being developed by a company (Aurora Bio) to make this imaging agent available for widespread use.
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UTMC Dr. Ron Lands Dr. “Woody” Besozzi Dr. Dustin Osborne Dr. Yitong Fu Dr. Dustin Powell Bryan Whittle Robin Geldritch Barbara Marine
ACTP Dr. Steve Kennel Dr. Emily Martin Alan Stuckey Steve Foster Tina Richey Angela Williams Sallie Macy Craig Wooliver
UTMC Jennifer Ferris Dr. John Bell Dr. Rod Ramchandren Dr. Muddassir Mehmood Brett Hines Dr. Eric Heidel