Fluorescence-based visualization of autophagic activity predicts mouse embryo viability

Satoshi Tsukamoto, Taichi Hara, Atsushi Yamamoto, Seiji Kito, Naojiro Minami, Toshiro Kubota, Ken Sato, Toshiaki Kokubo

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Embryo quality is a critical parameter in assisted reproductive technologies. Although embryo quality can be evaluated morphologically, embryo morphology does not correlate perfectly with embryo viability. To improve this, it is important to understand which molecular mechanisms are involved in embryo quality control. Autophagy is an evolutionarily conserved catabolic process in which cytoplasmic materials sequestered by autophagosomes are degraded in lysosomes. We previously demonstrated that autophagy is highly activated after fertilization and is essential for further embryonic development. Here, we developed a simple fluorescence-based method for visualizing autophagic activity in live mouse embryos. Our method is based on imaging of the fluorescence intensity of GFP-LC3, a versatile marker for autophagy, which is microinjected into the embryos. Using this method, we show that embryonic autophagic activity declines with advancing maternal age, probably due to a decline in the activity of lysosomal hydrolases. We also demonstrate that embryonic autophagic activity is associated with the developmental viability of the embryo. Our results suggest that embryonic autophagic activity can be utilized as a novel indicator of embryo quality.

Original languageEnglish
Article number4533
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 2014 Mar 31
Externally publishedYes

Fingerprint

Embryonic Structures
Fluorescence
Autophagy
Assisted Reproductive Techniques
Optical Imaging
Maternal Age
Hydrolases
Lysosomes
Fertilization
Quality Control
Embryonic Development

ASJC Scopus subject areas

  • General
  • Medicine(all)

Cite this

Tsukamoto, S., Hara, T., Yamamoto, A., Kito, S., Minami, N., Kubota, T., ... Kokubo, T. (2014). Fluorescence-based visualization of autophagic activity predicts mouse embryo viability. Scientific Reports, 4, [4533]. https://doi.org/10.1038/srep04533

Fluorescence-based visualization of autophagic activity predicts mouse embryo viability. / Tsukamoto, Satoshi; Hara, Taichi; Yamamoto, Atsushi; Kito, Seiji; Minami, Naojiro; Kubota, Toshiro; Sato, Ken; Kokubo, Toshiaki.

In: Scientific Reports, Vol. 4, 4533, 31.03.2014.

Research output: Contribution to journalArticle

Tsukamoto, S, Hara, T, Yamamoto, A, Kito, S, Minami, N, Kubota, T, Sato, K & Kokubo, T 2014, 'Fluorescence-based visualization of autophagic activity predicts mouse embryo viability', Scientific Reports, vol. 4, 4533. https://doi.org/10.1038/srep04533
Tsukamoto, Satoshi ; Hara, Taichi ; Yamamoto, Atsushi ; Kito, Seiji ; Minami, Naojiro ; Kubota, Toshiro ; Sato, Ken ; Kokubo, Toshiaki. / Fluorescence-based visualization of autophagic activity predicts mouse embryo viability. In: Scientific Reports. 2014 ; Vol. 4.
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