genetic modfication human embryos -- presenter slides cirm conference 2-4-16
DESCRIPTION
These slides were uploaded by the California Stem Cell Report and were provided by the California stem cell agency.TRANSCRIPT
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Ethics and Gene Editing in Human Embryos: ISSCR Policy
Jonathan KimmelmanSTREAM (Studies of Translation, Ethics and Medicine)McGill University
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Guidelines 2.0
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labstudies
therapeutictrials
assistedreproduction
?
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respecting cultural differences(setting a baseline)
respecting political differences (e.g. mechanism)
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Principles
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…biomedical research is a collective endeavor. It depends on the contributions of many kinds of individuals, including basic scientists, clinicians, [and] patients... Ethics principles and guidelines help secure the basis for this collective endeavor
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Principles
Integrity of the Research EnterpriseRespect for SubjectsSocial JusticeTransparencyPrimacy of Patient Welfare
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…research should be overseen by qualified investigators and coordinated in a manner that is sustainable and ensures that the information obtained will be trustworthy, reliable, accessible, and responsive to scientific uncertainties and priority health needs. Doing so entails the need for independent peer review, transparency, and continued monitoring at each stage of research
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Parties to the testing and application of stem cell-based interventions should promote timely exchange of accurate scientific information to other interested parties
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Physicians and physician-researchers owe their primary duty to the patient and/or research subject. They must never unduly place vulnerable patients at risk. Clinical testing should never allow promise for future patients to override the welfare of current research subjects. Application of stem cell-based interventions outside of formal research settings should be evidence-based, subject to independent expert review, and serve patients’ best interests…
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hEmbryo
gene editing
?
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1. Process
2. Substance
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EMRO
reviewapprovalongoing monitoring
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1. Process
2. Substance
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research involving the genetic manipulation of human embryos or gametes used to make embryos in vitro
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criteria
scientific meritexpertise of investigatorsethical justification
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In vitro culture of any post-fertilization human embryo or organized cellular structure that might manifest human organismal potential, regardless of derivation method, beyond 14 days or formation of the primitive streak, whichever occurs first. This prohibition extends to experiments whereby human embryos or organized cellular structures that might manifest human organismal potential are gestated in any non-human animal uterus.
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hEmbryo>14d;primitive streak
ISSCR
Xin vitro
nDNAmodification
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hEmbryo>14d;primitive streak
ISSCR
Xin vivononhuman
nDNAmodification
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Research in which human embryos that have undergone modification of their nuclear genome are implanted into or gestated in a human or non-human uterus . Genome-modified human embryos include human embryos with edits to their nuclear DNA and/or embryos generated from a human gamete that has had its nuclear DNA modified.
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hEmbryo implantation
ISSCR
X
nDNAmodification
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hEmbryo implantation
ISSCR
X
nDNAmodification
gamete
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Emerging Categories of Embryos ResearchThat Merits Close Review
Recommendation 2.1.4
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Recommendation 2.1.4: The ISSCR supports laboratory-based research that entails modifying the nuclear genomes of gametes, zygotes and/or pre-implantation human embryos, performed under a rigorous EMRO process….
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Recommendation 2.1.4:
…Such research will enhance fundamental knowledge and is essential to inform any thoughtful deliberations about the potential safety and use of nuclear genome editing in strategies aimed at preventing the transmission of genetic disorders…
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Recommendation 2.1.4:
…until further clarity emerges on both scientific and ethical fronts, the ISSCR holds that any attempt to modify the nuclear genome of human embryos for the purpose of human reproduction is premature and should be prohibited at this time.
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a) safety and long term risks
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b) public and international dialogue on the capabilities and limitations of… their application to the human germ line
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In contrast, mitochondrial replacement therapy employs distinct methods and does not entail direct modification to the nuclear genome…The Guidelines documented herein and below provide plausible mechanisms of review, approval, and oversight…
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Principles
Integrity of the Research EnterpriseRespect for SubjectsSocial JusticeTransparencyPrimacy of Patient Welfare
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Parties to the testing and application of stem cell science should promote timely exchange of accurate scientific information… Investigators should communicate with various publics... Research teams should promote open and prompt sharing of ideas, data and materials.
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Recommendation 3.2.4.1: Sponsors, researchers, and clinical investigators should publish preclinical studies in full, and in ways that enable an independent observer to interpret the strength of the evidence supporting the conclusions.
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3 unresolved points :
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1) biosafety
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2) non-edited (e.g. lenti)
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3) noninheritable (in utero, episomal)
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NationalAcademiesofScienceEngineering andMedicine
HumanGenome Initiative
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Itwouldbeirresponsible toproceedwithanyclinicaluseofgermline editing unless anduntil
(i) therelevantsafetyandefficacyissues havebeenresolved,basedonappropriateunderstanding andbalancingofrisks,potential benefits, andalternatives, and
(ii)there isbroadsocietal consensus abouttheappropriateness oftheproposedapplication.Moreover,anyclinicaluseshouldproceedonlyunderappropriateregulatoryoversight.
Atpresent, thesecriteriahavenotbeenmetforanyproposedclinical use:thesafetyissueshavenotyetbeenadequately explored;thecasesofmostcompelling benefit arelimited; andmanynationshavelegislative orregulatorybansongermlinemodification.
However,asscientific knowledgeadvancesandsocietal viewsevolve,theclinical useofgermline editingshouldberevisitedonaregularbasis.
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Statement ofTask:Thestudywill examine thescientific underpinnings aswellastheclinical, ethical, legal, andsocialimplications of theuse ofhuman genomeediting technologies inbiomedical research andmedicine. ….
What isthecurrentstateofthescience ofhuman geneediting, aswell aspossible future directions…
What arethepotential clinical applications…
What isknown about theefficacy and risks of geneediting inhumans, andwhatresearchmightincrease thespecificity andefficacy of human gene editingwhile reducing risks? …
Canorshould explicit scientific standards beestablished forquantifying off-targetgenome alterations…
Docurrent ethicaland legalstandards forhuman subjects research adequately address human geneediting… What aretheethical, legal, andsocial implications oftheuse of currentandprojected gene-editing technologies inhumans?
What principles orframeworks mightprovide appropriate oversight forsomatic and germline editing inhumans? Arethereexamples ofhow these issues arebeing addressed intheinternational context?
What aretheprospects forharmonizing policies? Whatcanbelearned from theapproaches being applied indifferentjurisdictions?
Thecommittee willaddress these questions andprepare areport thatcontains itsfindings and recommendations. Thereportwill provide aframework basedon fundamental, underlying principles thatmaybeadapted andadopted by anynation thatisconsidering thedevelopment ofguidelines. The reportwill also include afocus on advice fortheUnited States.
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Public Meetings
Meeting #1The committee held abrief open session inwhich theydiscussed thechargewith thestudy sponsors.December 3,2015 (4:00 pmeastern) Washington, DC
Meeting #2:Thecommittee willhearinput from selectstakeholder groups.When: February 11, 2016(8:00 ameastern)Where: Washington, DC,Keck Center oftheNational Academies
Meeting #3:Thecommitteewill hearinput fromtheinternational community. Thiswillbethe final public meeting oftheconsensus committee. When: April 29-30, 2016Where: Europe (city TBD)
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CommitteeMembers
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Formoreinformation:
http://nationalacademies.org/gene-editing/consensus-study/index.htm
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Current and possible research applica2ons using human germline
genome edi2ng
Amander Clark PhD Professor and Vice Chair
Molecular Cell and Developmental Biology University of California, Los Angeles
Eli and Edythe Broad Center for Regenera2ve Medicine and Stem Cell Research
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Informed Consent for human embryo research
Donated embryos will not be used to create a baby
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Growing interest in human embryo dona2on for research purposes
Donors consented per year
2007
2008
2009
2010
2011
2012
2013
2014
2015
0
50
100
150
Year embryos were received
Num
ber o
f don
ors
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Research preferences at 2me of consent
Strong support from donors for research into human embryo development
Human embryo development
Stem cell research
Human embryo and stem cell research
Kalista et al., Cell Stem Cell 2013
38% 32%
30%
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Basic Research ques2ons
Improving IVF outcomes
Improving Stem cells and
Regenera2ve medicine
Fidelity of CRISPR in human embryos