Mouse Study Tests Heart Muscle Repair
A temporary signal encouraged heart cells to divide.
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In this lesson: Explain the proposed mechanism and the limits of the comparison.
Grammar in this story: A temporary action
temporarily activated
Temporarily limits the duration of activation; it does not describe a permanent genetic change.
Your turn
Explain how the treatment worked and what remains uncertain.
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The mRNA temporarily activated two proteins, encouraging mouse heart cells to divide. The blood-pumping result was better than in comparison mice, but human safety and effectiveness remain unestablished.
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