managing an organ - new therapies - critical care canada ......cypel/keshavjee. normothermic ex vivo...
TRANSCRIPT
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Marcelo Cypel MD MSc
Canada Research Chair in Lung Transplantation
Surgical Director, ECLS program UHN
Assistant Professor of Surgery
Division of Thoracic Surgery
University of Toronto
Managing an Organ - New Therapies
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DISCLOSURE
• Vitrolife, XVIVO Perfusion – Research support
and clinical trial
• Co-founder and Medical Officer Perfusix Canada
and United States
• Co-founder XOR Toronto Labs
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First Successful Lung Transplantation in the World Toronto General Hospital1983
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First Lung Tx
First Double Lung Tx
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5
Indications(TGH) N=1500
Eisenmenger's
3%
Cystic Fibrosis
22%
ILD/IPF
31%
Other
3%
Re-Tx
3%
COPD/
Emphysema
33%
PAH
5%BAC
1%
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Major Obstacle for Lung Transplantation Success
•Absence of sufficient organs to meet the growing demand!
•Up to 30% patients die on wait lists
• Larger number of patients are not even listed
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Low Utilization Rates
www.unos.org.2011
BDD=17% DCD=2%
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Munshi L, Keshavjee S, Cypel M. The Lancet RM Volume 1, Issue 4, Pages 318 - 328, June 2013
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Clinical Problem - PGD
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Reduction of cell metabolism by 95%
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Normothermic Preservation
• Time to accurately assess, diagnose (improve utilization)
• Option to treat, recover, repair (targeted)
• Opportunity to reassess confirm results of treatment
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Lindbergh, Science, 1935
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Couves, CM
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TORONTO EX VIVO LUNG PERFUSION (EVLP) SYSTEM
Perfusion : 40% CO, LAP 5mmHg, PAP 10-12mmHg
Ventilation: 7cc/kg, 7BPM, PEEP 5, FiO2 = 21%
Cypel et al. J Heart Lung Transplant 2008; 27(12):1319-25.
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Toronto Sky Dome Toronto XVIVOTM System
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DEVELOPMENT OF A STABLE AND RELIABLE EX VIVO LUNG PERFUSION TECHNIQUE
Cypel/Keshavjee. Technique for Prolonged Normothermic Ex Vivo Lung
Perfusion. J Heart Lung Transplant 2008;27(12):1319-25.
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NORMOTHERMIC EX VIVO PERFUSION INTERRUPTS COLD ISCHEMIC INJURY (24h)
CSP EVLP
Cypel/Keshavjee. Normothermic ex vivo perfusion prevents lung injury compared to extended
cold preservation for transplantation. Am J Transplant. 2009 Oct;9(10):2262-9
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VIDEO
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22
NEJM, April 14th 2011, vol. 364, no. 15, pp. 1431-1440.
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Study Logistics
Donor Lungs Referred for EVLP
Cold Ischemic Time 1 (transportation)
EVLP for 4-6h P/F>400mmHg, stable or improved PawP, PVR, Compliance, X-ray
Cold Ischemic Time 2
Transplantation
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Bronchoscopy
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Lung Xray
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Stable or Improved Ex vivo Function
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Early outcomes were similar in the 2 groups
NEJM, April 14th 2011
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Cypel et al. Experience with the first 50 ex vivo lung perfusions in clinical
lung transplantation. JCTVS September 2012
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Survival
0 365 730 1095 1460
0
20
40
60
80
100controls (n=253)
EVLP (n=50)
1 2 3 4
p=0.69
Years after LTx
Perc
en
t su
rviv
al
Cypel et al. Experience with the first 50 ex vivo lung perfusions in clinical
lung transplantation. JCTVS September 2012
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Survival
0 365 730 1095 1460
0
20
40
60
80
100controls (n=253)
EVLP BDD (n=28)
EVLP DCD (n=22)
p=0.71
1 2 3 4
Years after LTx
Perc
en
t su
rviv
al
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EVLP Experience in Toronto
Assessed
(n=105)
Transplants (n=84) Transplants (n=21)
Utilization Rate of EVLP Lungs
84/105 = 80%
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0
20
40
60
80
100
120'0
8
'09
'10
'11
'12
'13
No
of
Tx /
yr
Year
EVLPLung Tx
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Current State of EVLP
•> 300 cases done North America and Europe
•3 clinical trials (1 US and 2 Europe)
•XVIVO, Transmedics, Vivoline
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Engineering Superior Organs
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Ex vivo treatment opportunities Donor lung injuries
1- Pulmonary Edema
2- Brain death associated inflammation
3- Infection, Pneumonia
4- Aspiration
5- Pulmonary emboli
6- Ischemia-reperfusion injury
7- Immunologic preparation
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Advantages of ex vivo treatment
• Increased time for interventions
• Avoid systemic side effects
• Treatment is specific to the organ
• Prolonged half-life of drugs in perfusate
• Absence of systemic inflammatory milieu
• Opportunity for post-treatment re-assessment
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Resolution of pulmonary edema during EVLP
Donor P/F 230
1h EVLP
3h EVLP
Recipient P/F 420
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Infection
•Large proportion of rejected human lungs
•EVLP is ideal
• Super high doses of antibiotics can be
administered without systemic effects
• Prolonged half-life.
•Start with treatment of early infections or lung contralateral to established pneumonia
•Prolonged perfusion (>12h) might be required
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Repairing Human Lungs with Presumed Infection
• 6 lungs rejected for suspicion of infection
• 12h normothermic EVLP with high doses of antibiotics
0
100
200
300
400
500
600
1 3 6 9 12
Pneumonia - Mean Delta pO2 (FiO2 1)
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40
Ex Vivo Treatment of Infection
0
20
40
60
80
100
120
0h 6h 12h
10
6 C
FU
/L
Ps Aeruginosa (n= 4)
0
20
40
60
80
100
120
0h 6h 12h
10
6 C
FU
/L
S Aureus (n= 3)
0
20
40
60
80
100
120
0h 6h 12h
10
6 C
FU
/L
St Maltophilia (n= 3)
0
20
40
60
80
100
0h 6h 12h
10
6 C
FU
/L
Trichosporon (n= 3)
0
1
2
3
4
5
6
0h 6h 12h
10
6 C
FU
/L
E Coli (n= 2)
0
20
40
60
80
100
120
0h 6h 12h
10
6 C
FU
/L
Enterobacter (n= 1)
control
control
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Clinical Case:
Diagnosing and Treating a Specific Problem
41
Personalized Medicine for the Organ
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Surgical Extraction of Large Clots of Varying Age in Donor Lung PA
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EVLP Assessment confirms the in vivo findings
• On initiation of EVLP: abnormal PA pressures even with low flows
Persistent hemodynamic
impairment in the ex vivo organ
Apply similar diagnosis / treatment
as in vivo treatment of massive PE
ALTEPLASE 20 mg (reduced
clearance)
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Significant improvement of Pulmonary Hemodynamics after treatment
treatment
Response monitoring
diagnosis
Alteplase
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D-dimer and Evidence of Thrombolysis
11-fold
increase
Ex vivo treated lung
with massive PE
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Pathology: Ex vivo lung biopsy, Quick Section pathologic Examination
No evidence of chronic
vascular abnormalities
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Functional Repair of Human Donor Lungs by Ex Vivo IL-10 Gene Therapy
M Cypel, M Liu, M Rubacha, J C Yeung, S Hirayama, M Anraku, M Sato, J Medin, BL Davidson, M de Perrot, TK Waddell, A S Slutsky, S Keshavjee. Sci Trans. Med 1:4ra9; 2009.
PaO2/FiO2
-100
0
100
200
300 *
Ch
an
ge
fr
om
B
ase
lin
e(m
mH
g)
PVR
-600
-400
-200
0
200
400
600
*
(dynes.s
ec.c
m-5
)
EVLP/AdIL-10 EVLP
Delivery of IL-10 by EVLP Ad Gene Therapy to injured human donor lungs
resulted in improved lung function
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Recovery of alveolar epithelial cell tight junctions (ZO-1) after AdhIL-10 gene therapy in Human Lungs.
Cypel/Keshavjee et al. Science Translational Medicine Oct 28, 2009.
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The Future of Transplantation… The “Organ Repair Center”
Heart Lung
Kidney Liver
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Exterior Rendering Spring Street Façade/Orange
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Donor Management
Organ Procurement
Cold Preservation
Ex vivo Evaluation
Ex vivo Organ-Specific Injury Repair
Transplantation