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- W2006454411 abstract "We report unexpected anti-inflammatory properties for naked, unmodified poly(amidoamine) (PAMAM) dendrimers bearing simple surface functionality (e.g., -NH(2), -OH, etc.). This property was discovered serendipitously while studying the drug delivery features of PAMAM dendrimer-indomethacin complexes. Activity was quantitated by using three independently recognized in vivo anti-inflammatory assay methods, namely, (1) the carrageenan-induced paw edema model (acute activity), (2) the cotton pellet test, and (3) the adjuvant-induced arthritis assay in rats (chronic activities). Those dendrimers bearing amine or hydroxyl surface groups exhibited significant anti-inflammatory activity in the carrageenan-induced paw edema model. For example, [core: 1,2-diaminoethane]; (G = 4.0); {dendri-poly(amidoamine)-(NH(2))(64)} (i.e., G4-NH(2)) exhibited a mean percent inhibition of 35.50 +/- 1.6% 3 h after administration and [core: 1,2-diaminoethane] (G = 4.0); {dendri-poly(amidoamine)-(OH)(64)} (i.e., G4-OH) gave a mean percent inhibition of 31.22 +/- 1.58% 3 h after administration. On the other hand, [core: 1,2-diaminoethane] (G = 4.5); {dendri-poly(amidoamine)-(CO(2)H)(128)} (i.e., G4.5-CO(2)H) exhibited mild anti-inflammatory activity with a mean percent inhibition of 14.00 +/- 2.5% 3 h after administration. Unexpectedly, G4-NH(2) showed significantly higher activity compared to naked indomethacin (i.e., 50 +/- 3.1% vs 22 +/- 1.2%) using the cotton pellet granuloma model. Similarly, in the adjuvant-induced arthritis model, G4-NH(2) compared to naked indomethacin gave a mean percent inhibition of 30 +/- 1.9% versus 11 +/- 0.9% 14 days after administration." @default.
- W2006454411 created "2016-06-24" @default.
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- W2006454411 date "2009-04-06" @default.
- W2006454411 modified "2023-09-24" @default.
- W2006454411 title "Unexpected In Vivo Anti-Inflammatory Activity Observed for Simple, Surface Functionalized Poly(amidoamine) Dendrimers" @default.
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- W2006454411 doi "https://doi.org/10.1021/bm9000298" @default.
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