Cytotoxic effects of CdSe quantum dots on maturation of mouse oocytes, fertilization, and fetal development.
Quantum dots (QDs) are useful novel luminescent markers, but their embryonic toxicity is yet to be fully established, particularly in oocyte maturation and sperm fertilization. Earlier experiments by our group show that CdSe-core QDs have cytotoxic effects on mouse blastocysts and are associated with defects in subsequent development. Here, we further investigate the influence of CdSe-core QDs on oocyte maturation, fertilization, and subsequent pre- and postimplantation development. CdSe-core QDs induced a significant reduction in the rates of oocyte maturation, fertilization, and in vitro embryo development, but not ZnS-coated CdSe QDs. Treatment of oocytes with 500 nM CdSe-core QDs during in vitro maturation (IVM) led to increased resorption of postimplantation embryos and decreased placental and fetal weights. To our knowledge, this is the first study to report the negative impact of CdSe-core QDs on mouse oocyte development. Moreover, surface modification of CdSe-core QDs with ZnS effectively prevented this cytotoxicity.
Hsieh
Ming-Shu
MS
Department of Bioscience Technology and Center for Nanotechnology, Chung Yuan Christian University, Chung Li, Taiwan.
Shiao
Nion-Heng
NH
Department of Bioscience Technology and Center for Nanotechnology, Chung Yuan Christian University, Chung Li, Taiwan.
Chan
Wen-Hsiung
WH
Department of Bioscience Technology and Center for Nanotechnology, Chung Yuan Christian University, Chung Li, Taiwan.
D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D001755:Blastocyst / Q000187:drug effects / Q000378:metabolism; D019187:Cadmium Compounds / Q000737:chemistry / Q000378:metabolism*; D049109:Cell Proliferation / Q000187:drug effects; D047108:Embryonic Development / Q000187:drug effects*; D005260:Female; D005306:Fertilization / Q000187:drug effects; D051379:Mice; D008810:Mice, Inbred C57BL; D008813:Mice, Inbred ICR; D009865:Oocytes / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D010920:Placenta / Q000502:physiology; D011247:Pregnancy; D045663:Quantum Dots / Q000737:chemistry / Q000378:metabolism / Q000633:toxicity*; D018036:Selenium Compounds / Q000737:chemistry / Q000378:metabolism*; D019287:Zinc Sulfate / Q000737:chemistry
D019187:Cadmium Compounds; D018036:Selenium Compounds; D019287:Zinc Sulfate; C058667:cadmium selenide