Emerging therapies for FAODs
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Transcript of Emerging therapies for FAODs
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JerryVockley,M.D.,Ph.D.Cleveland FamilyProfessorofPediatrics
ProfessorofHumanGeneticsUniversity ofPittsburghChiefofMedicalGenetics
DirectoroftheCenterforRareDiseaseTherapyChildren’sHospitalofPittsburgh
EmergingtherapiesforFAODs
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• TheInternationalNetworkforFattyAcidOxidationResearchandManagement(INFORM)hasbeenformedinordertopromulgateinformationontheresearchandmanagementofdisordersoffattyacidoxidation.
• TheNetworkwillprovideacollaborativeframeworkforongoingcommunicationandresearchbetweenthemembers.
Missionstatement
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• Researchfunding– NIH– Ultragenyx– Stealth– Reata– Mitobridge– Wellstat
• Consulting– AmericanGeneTherapies– Mitobridge
Conflictsofinterest
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ThankstoInnsbruck
INFORM Inaugural Symposium: September 6, 2014 Innsbruck, Austria
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WelcometoLyon
INFORM Second Annual Symposium: September 4-5, 2015 Lyon, France
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Markyourcalendars!
INFORM Third Annual Symposium: May 9-11, 2016Boston, MA USA
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Organizingcommittee
Nicola Longo, M.D., Ph.DCo-ChairProfessor of PediatricsUniversity of Utah School of Medicine
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Sponsorsandpartners
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Startingline
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Anaplerotictherpy
PC
X
X
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• Triheptanoin– FDAphase2complete– Publicationoncompassionateuse– Phase3soon?
• Anti-inflammatories• Bendavia (StealthBiotherapeutics)• RTA408(Reata Pharm.,Inc.)• Mitobridge• Uridine• Ravicti inMCAD(Horizon)
FAODsclinicaltrials
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TriheptanoinTreatmentHistory
AgeatStartof
Treatment*
DurationofTreatment
<1year 1-2years 2-5years >5years TotalN(%)
0-1month(Neonates) - - - 2 2
1month-2years(Infants) 1 - 1 3 52-12years(Children) - - - 10 10
12-16years(Adolescents) - - - - -
>16years(Other) - - 1 2 3TotalN (%) 1 - 1 17 20
*Doselevelsvariedovertimeandpersubject.Targetdoselevelswereinitially2-4g/kgandlater1-2g/kgTriheptanoin.
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Hospitaldays/year
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Hypoglycemicevents/year
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Rhabdo hospitalizations
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• LC-FAODleadtofrequentcomplications/hospitalizations• Treatmentwithtriheptanoinappearstoreducethehospitalizationsandhospitaldays
• Hypoglycemichospitalizationswerenearlyeliminated• Rhabdomyolysishospitalization#notchanged• Additionalstudiesplanned
Triheptanoin
Decrease inEventRate
Decrease in#ofHospitalizationDays
TotalEvents 30% 67%
Hypoglycemia 96% 98%
Rhabdomyolysis No Change 60%
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FDAtriheptanointrial
Doubly-labeled water (DLW) measure of TEE completed at home.
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SubjectsDiagnosis Triheptanoin C7 MCT C8
CPT-2 (n) 5Age 21-64; BMI 18-33
6Age 8-43; BMI 17-35
VLCAD (n) 4Age 7-38; BMI 17-31
5Age 23-42; 22-31
LCHAD/TFP (n) 7Age 7-29; BMI 14-24
5Age 8-17; BMI 15-23
TOTAL: 16 16
Participant Characteristics Triheptanoin C7 MCT C8
Age (years) 7 - 64 8 - 43
BMI (kg/m2) 14-33 15-35
Males (n) 6 6
Females (n) 10 10
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Adverseevents
ExpectedAdverseEventC-7 C-8
#ofevents #ofsubjects #ofevents #ofsubjects
Diarrhea/LooseStools/Steatorrhea 9 5 12 6GastrointestinalUpset 24 11 38 12Emesis/Vomiting 7 6 0 0MusculoskeletalPain/Cramping/ElevatedCPK 16 11 18 10Rhabdomyolysis(hospital admission) 7 5 7 4Fatigue/Lethargy 3 3 2 2
UnexpectedAdverseEventC-7 C-8
#ofevents #ofsubjects #ofevents #ofsubjects
Headache 17 5 7 3ViralIllness 22 15 17 11LocalizedPainNotAssociatedwithRhabdomyolysis 5 4 2 2Dermatitis 1 1 4 4
• No difference in GI upset or diarrhea between groups• Emesis occurred in 6 subjects, only in triheptanoin group• No difference in rhabdomyolysis, fatigue, or unexpected AE’s
Triheptanoin is similarly tolerated as MCT
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• Nodifference inGIupsetordiarrheabetween groups• Emesis occurredin6subjects, onlyintriheptanoin group• Nodifference inrhabdomyolysis, fatigue,orunexpected AE’s
ExpectedAdverseEventC-7 C-8
#ofevents #ofsubjects #ofevents #ofsubjects
Diarrhea/LooseStools/Steatorrhea 9 5 12 6GastrointestinalUpset 24 11 38 12Emesis/Vomiting 7 6 0 0MusculoskeletalPain/Cramping/ElevatedCPK 16 11 18 10Rhabdomyolysis(hospital admission) 7 5 7 4Fatigue/Lethargy 3 3 2 2
UnexpectedAdverseEventC-7 C-8
#ofevents #ofsubjects #ofevents #ofsubjects
Headache 17 5 7 3ViralIllness 22 15 17 11LocalizedPainNotAssociatedwithRhabdomyolysis 5 4 2 2Dermatitis 1 1 4 4
Triheptanoin is similarly tolerated as MCT
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Improvedcardiacfunction
7% increase LV ejection fraction in Triheptanoin group
Triheptanoin MCT-10
-5
0
5
10LV
Eje
ctio
n Fr
action
%p=0.03
Triheptanoin MCT-20
-10
0
10
20
End
Syst
olic
Vol
ume
(ml)
p=0.03
Triheptanoin MCT-40
-20
0
20
40
End
Dia
stol
ic v
olum
e (m
l)
Triheptanoin MCT-60
-40
-20
0
20
40
LV w
all m
ass
(mm
)
p=0.09
Ejection Fraction End Diastolic Volume
End Systolic Volume LV wall mass
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Treadmillresponse
• Significantly lowerHeartRateforsameworkperformedwithTriheptanoin supplementation
• p=0.05adjustedforbaseline• Mean-7beatsperminute >MCT
warm-up 1-10 11-20 21-30 31-40 80
100
120
140
160
Time (min)
Hea
rt R
ate
(bea
ts p
er m
inut
e)
Baseline End of Study
MCT before treadmill MCT or Triheptanoin before treadmill
warm-up 1-10 11-20 21-30 31-40 80
100
120
140
160
Time (min)
Hea
rt R
ate
(bea
ts p
er m
inut
e)
Triheptanoin
MCT *p=0.05
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Comparedtopreviousstudy
• MCTê HR15bpm comparedtocarbohydrate• Triheptanoinê HR7bpm comparedwithMCT
warm-up 1-10 11-20 21-30 31-40 80
100
120
140
160
180
Time (min)
Hea
rt R
ate
(bea
ts p
er m
inut
e) CHOMCT
warm-up 1-10 11-20 21-30 31-40 80
100
120
140
160
180
Time (min)
Hea
rt R
ate
(bea
ts p
er m
inut
e)
TriheptanoinMCT
Behrend et al. MGM 2012 105: 110-115
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• MCTê HR15bpmcomparedtocarbohydrate• Triheptanoinê HR7bpmcomparedwithMCT
ImprovementwithC7>C8
warm-up 1-10 11-20 21-30 31-40 80
100
120
140
160
180
Time (min)
Hea
rt R
ate
(bea
ts p
er m
inut
e) CHOMCT
warm-up 1-10 11-20 21-30 31-40 80
100
120
140
160
180
Time (min)H
eart
Rat
e(b
eats
per
min
ute)
TriheptanoinMCT
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• TriheptanoinsimilarlytoleratedasMCT• Noobservedskeletalmuscleeffect• CardiaceffectofTriheptanoin– ImprovedLVejectionfraction–LowerHRforsameworkperformed
• SimilarCPK,acylcarnitines &ketones
Conclusions
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Alongsummer
With Permission
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• Datacollectionstillinprogress• ~12patientswithsevere,life-threateningcardiomyopathywhileonMCT
• AllbutonerecoveredwithC7treatment
Cardiomyopathy
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• Openlabel• 25patientstreated• Resultsreportedat24weeks• 8patientsqualifiedforexercisetesting
Ultragenyx phase2trial
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• Safety– Safeandwelltolerated– Nonewpotentialrisksidentified– MostcommonadverseeventsGI(similartoMCT)
• Exerciseresults(8patients)– 60%increaseinexerciseenergygeneratedcomparedtobaseline
– 28%increasein12minutewalkdistancecomparedtobaseline
• Generaloutcome– Decreaseinoverallmajormedicalevents– Eventratetobereportedat78weeks
Ultragenyx phase2 results
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InflammationinVLCADpatients
0 10 20 30 40 50 60 70 80 90
100
IL-8 IL-12 IL-17 INFγ MCP-1 MIP-1β 0"
50"
100"
150"
200"
250"
300"
350"
Control" Pa/ent" Control" Pa/ent" Control" Pa/ent"
NFkb" TNFa" CEBPb"
0"
200"
400"
600"
800"
1000"
1200"
1400"
Control" Pa/ent"
IFNg"
Blood cytokine levels Macropahge surface markers
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The Mitochondrion
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• 100s-1000spercell• Bacterialorigins• Cytoplasmic• Subcellularorganelles• Dynamic,pleomorphic,motile
Mitochondria
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Cardiolipin
CH2
O
P
OCH2
CH
O
CO
CH2
OCO
C
O. O.P
OCH2
O.
CH2
CH
CH2OCO
CO
H HOO
- -
TAZ
Monolysocardiolipin
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• Cardiolipinbindingtetrapeptide(D-Arg-dimethyl-Tyr-Lys-Phe-NH2
• Up-regulatesexpressionofnuclearencodedmito genes
• Reducescardiomyocyte apoptosispost-ischemia
• Decreasesamyloidβ inducedmitoabnormalities
• Improvesskeletalmusclefunciton
Bendavia
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corepressorcorepressor
PPRE
coactivatorcoactivator
↑ Fatty acidoxidation
Fatty acid oxidationgenes
Generegulation
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• Semi-synthetictriterpenoid• Nrf2promoteractivator(inducesPGC1a)
• ImprovesantioxidantgeneresponsetooxidativestressinFriedrich’sataxiacells
• RelatedcompoundimprovessurvivalinALSmousemodel
• ETCdeficiencystudyinprogress• Mitobridgewithsimilarcompounds
RTA408
N-(2-cyano-3,12-dioxo-28-noroleana-1,9(11)-dien-17-yl)-2,2-difluoro-propanamide
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• Regulatesmito ATP-sensitivepotassiumchannel– PreventsATPdepletion,Ca++ overload,andROSproduction
– Regulatesmito volumeandpH• Activationofmito-KATPincreasesATPsynthesisrateinhypoxictissues
• Decreasesinflammatorysignalling?
Uridinetriacetate
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• CommonK304EMCADmutationisafoldingdefect
• MCADmetabolizesphenylbutyryl-CoAassubstrate
• Bindingpocketanaloguesarestrongchaperonins
• Phenylbutyryl-CoAasachaperonintherapyforMCADdeficiency
MCADdeficiency
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MCADandphenylbutyrate
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Theskyisthelimit
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Justdoit!
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ThankYou!
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Questions?