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Related Experiment Video

Updated: Jun 14, 2026

Loss- and Gain-of-function Approach to Investigate Early Cell Fate Determinants in Preimplantation Mouse Embryos
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Heat shock memory in preimplantation mouse embryos.

Yanwei Jia1, Cristina Hartshorn, Odelya Hartung

  • 1Department of Biology, Brandeis University, Waltham, Massachusetts 02454, USA.

Fertility and Sterility
|April 10, 2010
PubMed
Summary

In vitro fertilization may stress embryos. Mouse embryos exposed to heat shock show a "memory" effect, becoming more sensitive to later heat exposure at the transcriptional level.

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Area of Science:

  • Developmental Biology
  • Reproductive Science
  • Embryology

Background:

  • In vitro fertilization (IVF) procedures may induce physiological stress in early-stage embryos.
  • Understanding the impact of environmental stressors on preimplantation development is crucial for improving IVF outcomes.

Purpose of the Study:

  • To investigate the physiological stress consequences of in vitro fertilization (IVF) on embryos.
  • To model the effects of heat stress on preimplantation mouse embryos.
  • To identify potential heat shock memory mechanisms in early embryonic development.

Main Methods:

  • Utilizing preimplantation mouse embryos as a model system.
  • Applying controlled heat shock treatments to embryos at the cleavage stage.
  • Analyzing transcriptional responses to primary and secondary heat stress perturbations.

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Last Updated: Jun 14, 2026

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Main Results:

  • A significant heat shock 'memory' was observed in cleavage-stage embryos.
  • Embryos exhibited increased transcriptional responsiveness to secondary, low-dose heat stress.
  • This heightened sensitivity persisted for several cell cycles post-initial stress.

Conclusions:

  • Preimplantation embryos possess a form of cellular memory to heat stress.
  • This memory influences transcriptional responses to subsequent environmental challenges.
  • Findings suggest IVF-induced stress could have lasting effects on embryo development.