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Tissue engineering is one of the new branches of medicine that focuses on the development of whole tissues and organs from cell cultures. However, current techniques fail to meet all the requirements of the healthcare system in terms of organ transplantation since, to a large extent, the creation of tissues and biological structures in vitro involves extensive knowledge of the cell to ensure that it survives, grows and eventually stimulates its functionality. Accordingly, piRNAS and all the biomolecular pathways associated with PIWI represent an innovative solution to the problem of tissue transplantation based on specific techniques that involve cell differentiation and division to regenerate and create a portion of or whole tissues and organs.