Stem cells range from totipotent, which can form a complete organism, to unipotent, which produce only one cell type. Yamanaka's transcription factors—Oct4, Sox2, Klf4, c-Myc—reprogramme specialised cells back to pluripotency, reversing differentiation. In our lab, we use this to derive induced pluripotent stem cells from patient samples.
But I see this reversal daily in my own way: every evening, my daughter's voice on the phone resets my tired mind to a state of pure joy, much like those factors restoring potential. The lab's pristine theory feels less profound than this cellular resilience we live.
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