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Poly-l-Lactic Acid Nanofiber-Polyamidoamine Hydrogel Composites: Preparation, Properties, and Preliminary Evaluation as Scaffolds for Human Pluripotent Stem Cell Culturing

Poly-l-Lactic Acid Nanofiber-Polyamidoamine Hydrogel Composites: Preparation, Properties, and Preliminary Evaluation as Scaffolds for Human Pluripotent Stem Cell Culturing

Chiara Gualandi, Nora Bloise, Nicolò Mauro, Paolo Ferruti, Amedea Manfredi, Maurilio Sampaolesi, Anna Liguori, Romolo Laurita, Matteo Gherardi, Vittorio Colombo, Livia Visai, Maria Letizia Focarete, Elisabetta Ranucci

Macromol Biosci. 2016 Oct;16(10):1533-1544.

PMID: 27282336

Abstract:

Electrospun poly-l-lactic acid (PLLA) nanofiber mats carrying surface amine groups, previously introduced by nitrogen atmospheric pressure nonequilibrium plasma, are embedded into aqueous solutions of oligomeric acrylamide-end capped AGMA1, a biocompatible polyamidoamine with arg-gly-asp (RGD)-reminiscent repeating units. The resultant mixture is finally cured giving PLLA-AGMA1 hydrogel composites that absorb large amounts of water and, in the swollen state, are translucent, soft, and pliable, yet as strong as the parent PLLA mat. They do not split apart from each other when swollen in water and remain highly flexible and resistant, since the hydrogel portion is covalently grafted onto the PLLA nanofibers via the addition reaction of the surface amine groups to a part of the terminal acrylic double bonds of AGMA1 oligomers. Preliminary tested as scaffolds, the composites prove capable of maintaining short-term undifferentiated cultures of human pluripotent stem cells in feeder-free conditions.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS71146	Poly(L-lactide), acrylate terminated			Price

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