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. 2018 Oct 23;8:15661. doi: 10.1038/s41598-018-33994-8

Figure 3.

Figure 3

The zebrafish ventricular myocardium stiffens during maturation and following cryoinjury but softens during regeneration. Representative pressure change versus stretch ratio curves of (A) maturing and (C) regenerating zebrafish ventricular myocardium. Strain energy density, a metric for tissue stiffness, was extracted from these curves and plotted for the (B) maturation and (D) regeneration processes. (B) The ventricle in the maturing zebrafish significantly stiffened between the ages of 2 and 7.5 months, which corresponds to the transition between juvenile to adult state (n ≥ 4). (D) The infarct zone significantly stiffened following cryoinjury at 0 DPI and continued to stiffen do so until 3 DPI. Afterwards, the infarct zone softened and by 35 DPI had normalized. Away from the infarct zone, the stiffness of the ventricular myocardium did not change (n ≥ 6).