Extraction, characterization and biological activity of Galactomannan rich endosperm of Borassus flabellifer (Linn.) suitable for biofabrication of tissue scaffolds.

The study deals with the isolation, purification and characterization of galactomannan from the endosperm of Borassus labellifer (Linn.) to be used for biomaterial fabrication in tissue engineering (TE) applications. The isolated Borassus flabellifer (Linn.) galactomannan (BFG) through a sequential aqueous dissolution, centrifugation and ethanol precipitation presented a total yield of 19.77 ± 1.05 % (w/w) with advantageous compositional and functional properties. BFG was found to have mannose to galactose (M/G) ratio of 1.4:1. The molecular weight of BFG was found to be 4.9 × 105 g/mol and the molecular structure analysis by FTIR and NMR spectroscopy revealed the presence of α–linked, d -galactopyranose units and β–linked, D-mannopyranose units. Further characterization by rheometer confirmed the non-Newtonian and pseudo-plastic behavior of different BFG concentrations and structural analysis by XRD and SEM confirmed the amorphous nature of BFG with the presence of pores and cervices on the rough surface. Finally, the favorable biological activity demonstrated in response to fibroblast cells against different BFG concentrations substantiates its relevance to be used in biofabrication of tissue scaffolds. [Display omitted] • Galactomannan rich material (BFG) was extracted from B. flabellifer (L.) endosperm by ethanol precipitation. • Extracted BFG had Mw of 4.9 × 105 g/mol with an MG ratio of 1.4:1. • BFG backbone contains α–linked D- galactopyranose and β–linked D-mannopyranose units. • Different BFG concentrations exhibited non-Newtonian and pseudo-plastic behavior. • BFG showed favorable biocompatibility against fibroblast cells. [ABSTRACT FROM AUTHOR]