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Soman and Vijayavenkataraman



























           Figure 1. Bioprinting of induced pluripotent stem cell (Ipsc)-derived tissues for regenerative medicine,
           disease modeling, and drug testing. Adult somatic cells are collected from a donor or a patient; the cells
           are reprogrammed to iPSCs and differentiated to specialized cells.





























           Figure 2. Reprogramming methods used to generate induced pluripotent stem cell.


           viral vectors [1,2,31-34] . It is essential to do the quality   for transcription factor delivery. Recent methods of
           control  of the iPSC lines created  using viral     reprogramming use Sendai Virus (SeV) particles
           vectors using whole-genome single nucleotide        and episomes. SeV particles are used to transduce
           polymorphism array and karyotyping to verify the    the reprogramming genes: Oct4, Sox2, Klf4, and
           genomic integrity.                                  c-Myc .  SeV  reprogramming  offers  the  absence
                                                                     [8]
           2.2 Non-integrating vectors                         of viral sequences in the host cell lines and is an
                                                               efficient method to induce pluripotency . In 2009,
                                                                                                   [35]
           To reduce the risk of unwanted genetic perturbations,   Yu et al. reported the episomal reprogramming in
           there was introduction of non-integrating methods   human cells where Epstein-Barr virus–derived


                                       International Journal of Bioprinting (2020)–Volume 6, Issue 4        61
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