Biology; Chemistry and chemical biology; Chemical and biological engineering; Biomedical engineering
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Enzymatic polymerization of poly(glycerol-1,8-octanediol-sebacate): versatile PGS analogs that form mono-component biodegradable fiber scaffolds, K. Lang, S. Bhattacharya, Z. Ning, R. J. Sánchez-Leija, M.T. K. Bramson, R. Centore, D. T. Corr, R. J. Linhardt, R.A. Gross, Biomacromolecules, 21, 3197-3206, 2020.
A family of poly(glycerol sebacate) (PGS) analogues were synthesized by Candida antarctica lipase B (CALB) catalysis to tailor biomaterial properties. Different fractions of glycerol (G) units in PGS were replaced by 1,8-octanediol (O) units. Poly(glycerol-1,8-octanediol-sebacate), PGOS, synthesized by CALB catalysis with a 1:3 molar ratio of G to O units has Mn and Mw values of 9500 and 92,000, respectively. PGS undergoes fiber fusion during electrospinning, and cross-linked PGS rapidly resorbs when implanted. By decreasing the molar ratio of glycerol-to-octanediol from 1:1 to 1:4, the peak melting temperature (Tm) increased from 27 to 47 °C. PGOS with 1:3 G to O units was electrospun into nanofibers without the need for a second component. The copolymer is semicrystalline and, when cross-linked, undergoes slow in vitro mass loss (3.5 ± 1.0% in 31 days) at pH 7.4 and 37 °C. Furthermore, PGOS cross-linked films have an elastic modulus of 106.1 ± 18.6 MPa, which is more than 100 times that of cross-linked PGS. New PGOS polymers showed tunable molecular weights, better thermal properties, and excellent electrospinnability. This work expanded PGS analogues’ function, making these suitable biodegradable polymers for various biomedical applications.;
Biomacromolecules, 21, 3197-3206; Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
The Linhardt Research Labs.; The Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS);
The Linhardt Research Labs Online Collection; Rensselaer Polytechnic Institute, Troy, NY; https://harc.rpi.edu/;