Public Cord Blood Banks as a source of starting material for clinical grade HLA-homozygous induced pluripotent stem cells.

Stem cell research & therapy 2022 Aug 12

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The increasing number of clinical trials for induced pluripotent stem cell (iPSC)-derived cell therapy products makes the production on clinical grade iPSC more and more relevant and necessary. Cord blood banks are an ideal source of young, HLA-typed and virus screened starting material to produce HLA-homozygous iPSC lines for wide immune-compatibility allogenic cell therapy approaches. The production of such clinical grade iPSC lines (haplolines) involves particular attention to all steps since donor informed consent, cell procurement and a GMP-compliant cell isolation process. Homozygous cord blood units were identified and quality verified before recontacting donors for informed consent. CD34+ cells were purified from the mononuclear fraction isolated in a cell processor, by magnetic microbeads labelling and separation columns. We obtained a median recovery of 20.0% of the collected pre-freezing CD34+, with a final product median viability of 99.1% and median purity of 83.5% of the post-thawed purified CD34+ population. Here we describe our own experience, from unit selection and donor reconsenting, in generating a CD34+ cell product as a starting material to produce HLA-homozygous iPSC following a cost-effective and clinical grade-compliant procedure. These CD34+ cells are the basis for the Spanish bank of haplolines envisioned to serve as a source of cell products for clinical research and therapy. © 2022. The Author(s).

Citation

Belén Álvarez-Palomo, Anna Veiga, Angel Raya, Margarita Codinach, Silvia Torrents, Laura Ponce Verdugo, Clara Rodriguez-Aierbe, Leopoldo Cuellar, Raquel Alenda, Cristina Arbona, Dolores Hernández-Maraver, Cristina Fusté, Sergi Querol. Public Cord Blood Banks as a source of starting material for clinical grade HLA-homozygous induced pluripotent stem cells. Stem cell research & therapy. 2022 Aug 12;13(1):408