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  • Acetalated dextran is a chemically and biologically tunable material for particulate immunotherapy.

Acetalated dextran is a chemically and biologically tunable material for particulate immunotherapy.

Proceedings of the National Academy of Sciences of the United States of America (2009-03-27)
Kyle E Broaders, Joel A Cohen, Tristan T Beaudette, Eric M Bachelder, Jean M J Fréchet
PMID19321415
ABSTRACT

Materials that combine facile synthesis, simple tuning of degradation rate, processability, and biocompatibility are in high demand for use in biomedical applications. We report on acetalated dextran, a biocompatible material that can be formed into microparticles with degradation rates that are tunable over 2 orders of magnitude depending on the degree and type of acetal modification. Varying the degradation rate produces particles that perform better than poly(lactic-co-glycolic acid) and iron oxide, two commonly studied materials used for particulate immunotherapy, in major histocompatibility complex class I (MHC I) and MHC II presentation assays. Modulating the material properties leads to antigen presentation on MHC I via pathways that are dependent or independent of the transporter associated with antigen processing. To the best of our knowledge, this is the only example of a material that can be tuned to operate on different immunological pathways while maximizing immunological presentation.

MATERIALS
Product Number
Brand
Product Description
719900
Sigma-Aldrich
Resomer® RG 504 H, Poly(D,L-lactide-co-glycolide), acid terminated, lactide:glycolide 50:50, Mw 38,000-54,000
739960
Sigma-Aldrich
Resomer® RG 505, Poly(D,L-lactide-co-glycolide), ester terminated, Mw 54,000-69,000
430471
Sigma-Aldrich
Poly(D,L-lactide-co-glycolide), ester terminated, Mw 50,000-75,000
P2066
Sigma-Aldrich
Poly(D,L-lactide-co-glycolide), lactide:glycolide 65:35, Mw 40,000-75,000
P1941
Sigma-Aldrich
Poly(D,L-lactide-co-glycolide), lactide:glycolide (75:25), mol wt 66,000-107,000
P2191
Sigma-Aldrich
Poly(D,L-lactide-co-glycolide), lactide:glycolide (50:50), mol wt 30,000-60,000
739979
Sigma-Aldrich
Resomer® RG 858 S, Poly(D,L-lactide-co-glycolide), ester terminated, lactide:glycolide 85:15, Mw 190,000-240,000
739952
Sigma-Aldrich
Resomer® RG 503, Poly(D,L-lactide-co-glycolide), lactide:glycolide 50:50, ester terminated, Mw 24,000-38,000
739944
Sigma-Aldrich
Resomer® RG 504, Poly(D,L-lactide-co-glycolide), lactide:glycolide 50:50, ester terminated, Mw 38,000-54,000
719889
Sigma-Aldrich
Resomer® RG 502, Poly(D,L-Lactide-co-Glycolide), lactide:glycolide 50:50, ester terminated, Mw 7,000-17,000
719870
Sigma-Aldrich
Resomer® RG 503 H, Poly(D,L-lactide-co-glycolide), acid terminated, lactide:glycolide 50:50, Mw 24,000-38,000
719897
Sigma-Aldrich
Resomer® RG 502 H, Poly(D,L-lactide-co-glycolide), acid terminated, viscosity 0.16-0.24 dL/g 
719919
Sigma-Aldrich
Resomer® RG 752 H, Poly(D,L-lactide-co-glycolide), acid terminated, lactide:glycolide 75:25, Mw 4,000-15,000
719862
Sigma-Aldrich
Resomer® RG 653 H, Poly(D,L-lactide-co-glycolide), acid terminated, Mw 24,000-38,000
719927
Sigma-Aldrich
Resomer® RG 756 S, Poly(D,L-lactide-co-glycolide), ester terminated, lactide:glycolide 75:25, Mw 76,000-115,000