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
2010
In vitro maturation improves oocyte or embryo cryopreservation outcome in breast cancer patients undergoing ovarian stimulation for fertility preservation
Oktay K, Buyuk E, Rodriguez-Wallberg K, Sahin G. In vitro maturation improves oocyte or embryo cryopreservation outcome in breast cancer patients undergoing ovarian stimulation for fertility preservation. Reproductive BioMedicine Online 2010, 20: 634-638. PMID: 20219430, DOI: 10.1016/j.rbmo.2010.01.012.Peer-Reviewed Original ResearchConceptsBreast cancer patientsMature oocyte yieldCancer patientsOvarian stimulationOocyte yieldFertility preservationFertility preservation cyclesMature oocytesCryopreservation cyclesTotal numberSecondary analysisVitro maturationImmature oocytesPatientsIVMEmbryo cryopreservationFertilization rateOocytesStimulationUseful strategyMaturationChemotherapy
2009
Fertility Preservation for Breast Cancer Patients
Oktem O, Oktay K. Fertility Preservation for Breast Cancer Patients. Seminars In Reproductive Medicine 2009, 27: 486-492. PMID: 19806518, DOI: 10.1055/s-0029-1241059.Peer-Reviewed Original ResearchConceptsBreast cancer patientsOvarian stimulation protocolsCancer patientsBreast cancerFertility preservationCancer survivorsStimulation protocolConventional ovarian stimulation protocolsRise of estrogenOvarian tissue freezingBreast cancer survivorsPreservation of fertilityEndogenous estrogen levelsFertility preservation strategiesAromatase inhibitor letrozolePremature ovarian failureNew cancer casesAdjuvant chemotherapyOvarian stimulationFertilization cyclesEstrogen levelsOvarian failureOocyte freezingReproductive ageCommon neoplasmStem 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
2001
Recent progress in oocyte and ovarian tissue cryopreservation and transplantation
Oktay K, Kan M, Rosenwaks Z. Recent progress in oocyte and ovarian tissue cryopreservation and transplantation. Current Opinion In Obstetrics & Gynecology 2001, 13: 263-268. PMID: 11396648, DOI: 10.1097/00001703-200106000-00003.Peer-Reviewed Original ResearchConceptsOvarian tissue cryopreservationOocyte freezingTissue cryopreservationOocyte cryopreservationOvarian tissueOvarian stimulation cyclesGroup of patientsNumber of pregnanciesInstitutional review boardOvarian transplantationAge-related declineOvarian functionStimulation cyclesReproductive surgeryContext of cancerCryopreserved oocytesReproductive functionEmbryo freezingTransplantationReview boardFirst caseInadequate timeSignificant scientific advancesWomenOocytes
2000
The 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 Research
1998
Cryopreservation of immature human oocytes and ovarian tissue: An emerging technology?
Oktay K, Newton H, Aubard Y, Salha O, G.Gosden R. Cryopreservation of immature human oocytes and ovarian tissue: An emerging technology? Fertility And Sterility 1998, 69: 1-7. PMID: 9457923, DOI: 10.1016/s0015-0282(97)00207-0.Peer-Reviewed Original ResearchConceptsOvarian tissueConservation of fertilityHigh-dose chemotherapyOvarian tissue cryopreservationImmature human oocytesOvarian biopsy samplesOvarian tissue bankingNeeds of patientsLong-term survivorshipCryopreservation of oocytesHealthy womenOvarian stromaImmature folliclesTissue cryopreservationPrimordial folliclesBiopsy samplesFollicle growthNeedy patientsImmature oocytesPatientsHuman oocytesDisappointing resultsOocyte fertilityReproductive optionsFollicles
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