2021
Individual-oocyte transcriptomic analysis shows that genotoxic chemotherapy depletes human primordial follicle reserve in vivo by triggering proapoptotic pathways without growth activation
Titus S, Szymanska K, Musul B, Turan V, Taylan E, Garcia- Milian R, Mehta S, Oktay K. Individual-oocyte transcriptomic analysis shows that genotoxic chemotherapy depletes human primordial follicle reserve in vivo by triggering proapoptotic pathways without growth activation. Scientific Reports 2021, 11: 407. PMID: 33431979, PMCID: PMC7801500, DOI: 10.1038/s41598-020-79643-x.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnimalsAntineoplastic Combined Chemotherapy ProtocolsApoptosisCyclophosphamideDNA DamageFemaleGene Expression ProfilingHeterograftsHumansMiceMice, Inbred NODMice, SCIDOocytesOogenesisOvarian FollicleOvarian ReserveOvarySignal TransductionSingle-Cell AnalysisTranscriptomeYoung AdultConceptsPrimordial follicle oocytesFollicle lossGrowth activationHuman ovarian xenograft modelPI3K/PTEN/AktFollicle oocytesDNA damagePI3K/PTEN/Akt pathwayOvarian reserve depletionPrimordial follicle reservePTEN/AKT pathwayIngenuity Pathway AnalysisOvarian xenograft modelPTEN/AKTSevere DNA damageExpression of AktGonadotoxic chemotherapyAnti-apoptotic Bcl2Early menopauseFollicle reserveTranscriptomic analysisCyclophosphamide injectionHuman ovaryPhosphorylation statusRNA sequencing
2019
BRCA-related ATM-mediated DNA double-strand break repair and ovarian aging
Turan V, Oktay K. BRCA-related ATM-mediated DNA double-strand break repair and ovarian aging. Human Reproduction Update 2019, 26: 43-57. PMID: 31822904, PMCID: PMC6935693, DOI: 10.1093/humupd/dmz043.Peer-Reviewed Original Research
2009
Stem cells and reproductive medicine.
Oktem O, Oktay K. Stem cells and reproductive medicine. Minerva Obstetrics And Gynecology 2009, 61: 247-52. PMID: 19745792.Peer-Reviewed Original Research
2005
Oocyte and Ovarian Tissue Cryopreservation: Indications, Techniques, and Applications
Shamonki M, Oktay K. Oocyte and Ovarian Tissue Cryopreservation: Indications, Techniques, and Applications. Seminars In Reproductive Medicine 2005, 23: 266-276. PMID: 16059833, DOI: 10.1055/s-2005-872455.Peer-Reviewed Original Research
2002
The potential of ovarian tissue transplant to preserve fertility
Buyuk E, Oktay K. The potential of ovarian tissue transplant to preserve fertility. Expert Opinion On Biological Therapy 2002, 2: 361-370. PMID: 11955275, DOI: 10.1517/14712598.2.4.361.Peer-Reviewed Original ResearchConceptsClinical studiesOvarian tissue transplantsSafety of pregnancyFuture clinical trialsPremature ovarian failureOvarian follicle developmentOvarian graftsOvarian cryopreservationOvarian transplantationOvarian functionCancer patientsOvarian failureClinical trialsAnimal studiesTissue transplantsOvarian tissueFurther basic researchHormone productionFollicle developmentRevascularisation processPregnancyPatientsTransplantationWomenSafetyPreliminary Experience with Orthotopic and Heterotopic Transplantation of Ovarian Cortical Strips
Oktay K, Yih M. Preliminary Experience with Orthotopic and Heterotopic Transplantation of Ovarian Cortical Strips. Seminars In Reproductive Medicine 2002, 20: 063-074. PMID: 11941536, DOI: 10.1055/s-2002-23520.Peer-Reviewed Original ResearchConceptsOvarian cortical stripsOvarian transplantationOvarian tissueCortical stripsHeterotopic transplantationAutologous ovarian transplantationFrozen ovarian tissueHeterotopic techniqueNew York surgeonPatient selectionOvarian functionSurgical techniqueTransplantationTransplanted tissuePreliminary experienceExperimental modelOperating roomCancer cellsClinical applicationTissueSafety measuresOrthotopicCliniciansSurgeonsTrounson
2001
Ovarian tissue cryopreservation and transplantation: preliminary findings and implications for cancer patients
Oktay K. Ovarian tissue cryopreservation and transplantation: preliminary findings and implications for cancer patients. Human Reproduction Update 2001, 7: 526-534. PMID: 11727860, DOI: 10.1093/humupd/7.6.526.Peer-Reviewed Original ResearchConceptsOvarian tissue cryopreservationTissue cryopreservationYoung womenFrozen-banked ovarian tissueBone marrow transplantationCancers of childrenAntral follicle developmentAggressive chemotherapyComplete remissionCancer treatment modalitiesMarrow transplantationBenign causesCancer patientsTreatment modalitiesTransplantation trialsFresh graftsXenograft studiesRodent studiesOocyte cryopreservationOvarian tissuePatientsFollicle developmentTransplantationCancer treatmentWomen
2000
Ovarian cryopreservation and transplantation: basic aspects
Oktay K, Karlikaya G, Aydin B. Ovarian cryopreservation and transplantation: basic aspects. Molecular And Cellular Endocrinology 2000, 169: 105-108. PMID: 11155939, DOI: 10.1016/s0303-7207(00)00361-0.Peer-Reviewed Original ResearchInteraction of Extracellular Matrix and Activin-A in the Initiation of Follicle Growth in the Mouse Ovary1
Oktay K, Karlikaya G, Akman O, Ojakian G, Oktay M. Interaction of Extracellular Matrix and Activin-A in the Initiation of Follicle Growth in the Mouse Ovary1. Biology Of Reproduction 2000, 63: 457-461. PMID: 10906050, DOI: 10.1095/biolreprod63.2.457.Peer-Reviewed Original ResearchConceptsFollicle growth initiationFollicle developmentFollicle growthFollicle growth rateFollicle densityRecombinant human activinEarly follicle developmentEarly follicular developmentRole of activinAbsence of activinTotal folliclesFollicular growthExtracellular matrixFollicular developmentTreatment groupsMultilayer folliclesMouse ovariesActivin treatmentHuman activinPresence of lamininActivinExtracellular matrix componentsPrecise mechanismMiceFolliclesThe re-incarnation of an old question— clomid effect on oocyte and embryo?
Oktay K, Berkowitz P, Berkus M, Schenken R, Brzyski R. The re-incarnation of an old question— clomid effect on oocyte and embryo? Fertility And Sterility 2000, 74: 422. PMID: 10970170, DOI: 10.1016/s0015-0282(00)00663-4.Peer-Reviewed Original ResearchTransplantation of cryopreserved human ovarian tissue results in follicle growth initiation in SCID mice
Oktay K, Newton H, Gosden R. Transplantation of cryopreserved human ovarian tissue results in follicle growth initiation in SCID mice. Fertility And Sterility 2000, 73: 599-603. PMID: 10689020, DOI: 10.1016/s0015-0282(99)00548-8.Peer-Reviewed Original ResearchConceptsOvarian tissueSCID miceFrozen-thawed human ovarian tissueFrozen-thawed ovarian tissueAutologous ovarian transplantationFrozen-thawed graftsHuman ovarian tissueFollicle growth initiationLong-term survivalWeeks of graftingHuman primordial folliclesFollicle countOvarian transplantationImmunodeficiency miceMAIN OUTCOMEHealthy folliclesPrimordial folliclesAcademic centersAnimal studiesFollicle stageAdvanced folliclesFolliclesGraftMiceNecrotic cells
1998
Development of human primordial follicles to antral stages in SCID/hpg mice stimulated with follicle stimulating hormone.
Oktay K, Newton H, Mullan J, Gosden R. Development of human primordial follicles to antral stages in SCID/hpg mice stimulated with follicle stimulating hormone. Human Reproduction 1998, 13: 1133-1138. PMID: 9647533, DOI: 10.1093/humrep/13.5.1133.Peer-Reviewed Original ResearchConceptsWeeks of graftingSevere combined immunodeficiencyFollicle growthOvarian xenograftsAntral stageOestradiol levelsLong-term graftHuman ovarian xenograftsHuman follicle developmentHuman ovarian tissueOvarian follicular growthPreantral follicle growthLong-term graftingGranulosa cell layerHuman primordial folliclesCell nuclear antigenFSH administrationHpg miceKidney capsuleGonadotrophin stimulationRenal capsuleHuman ovaryImmunodeficient miceFollicular growthSmall follicles
1996
Follicle freezing and autografting. A new method of medically assisted procreation?.
Aubard Y, Newton H, Oktay K, Piver P, Gosden R. Follicle freezing and autografting. A new method of medically assisted procreation?. La Presse Médicale 1996, 25: 921-3. PMID: 8685154.Peer-Reviewed Original ResearchConceptsOvulatory capacityHuman folliclePrimordial folliclesQuantity of folliclesUse of allograftsLarge animal modelImmunosuppressive therapyDestructive therapySuccessful treatmentOvarian fragmentsSurvival timeAnimal modelsOvarian tissueFollicular tissueFolliclesExperimental modelTherapyAge limitTissueHuman tissuesOvocytesEncouraging resultsOptimal siteReimplantationAllografts
1995
Proliferating Cell Nuclear Antigen Marks the Initiation of Follicular Growth in the Rat1
Oktay K, Schenken R, Nelson J. Proliferating Cell Nuclear Antigen Marks the Initiation of Follicular Growth in the Rat1. Biology Of Reproduction 1995, 53: 295-301. PMID: 7492681, DOI: 10.1095/biolreprod53.2.295.Peer-Reviewed Original ResearchConceptsPCNA expressionPrimary folliclesFollicle growthCell nuclear antigenAntral folliclesFollicular growthPCNA immunoreactivityGranulosa cellsNuclear antigenEarly primary folliclesGranulosa cell layerTransitional folliclesControl ratsAdult ratsPrimordial folliclesSensitive markerPCNA stainingAtretic folliclesRat ovaryOocyte enlargementProliferating Cell Nuclear AntigenEarly signsFolliclesParaffin sectionsPregranulosa cells