You are not logged in Total: 7journals, 20,687articles Online
AccountAccount
Login / Register
Forgot Login?
 
Main menuMain menu
What's new
Journal list
Visiting ranking
Phrase ranking
Polls
About us
 
SearchSearch
 
Journal Site
Advanced Search
 

Home  >  Journal list  >  Polymer Journal  >  Vol.41  No.9 (2009)  >  pp.715-725

Polymer Journal
<<Previous article Vol.41  No.9 (2009)   pp.715 - 725 Next article>>

Preparation and Properties of Polyamines: Part II–Controlled and Sustained Release of Nitric Oxide (NO) from Nitrosated Polymers

Jie Wang1), Yu-Han Teng2), Yu Hao3), Justin Oh-Lee4) and Dillip K. Mohanty3)
1) Dendritic Nanotechnology Inc.
2) Department of Chemistry, Stony-Brook University
3) Department of Chemistry, Central Michigan University
4) Department of Neuroscience, Central Michigan University


ABSTRACT:  The secondary amine moieties of polyamines prepared by the reactions of aliphatic diamines, and 1,5-difluoro-2,4-dinitrobenzene, were nitrosated using sodium nitrite and aqueous concentrated sulfuric acid at low temperature. Released NO from these polymers, suspended in water or phosphate buffer solutions (PBS), was measured at increasing time intervals by colorimetric techniques using Griess Reagent. Similar tests were also conducted with model compounds. In general, both the model compounds and the corresponding polymers exhibited similar NO release profiles, with apparent half lives up to 88 h and 81 h, respectively. They were strongly dependent on the length of the alkyl chains derived from the primary amines used for the preparation of these NO-releasing materials. Results from in vitro studies using low molecular weight NO-releasing compounds with PC-12 cell are also reported. High concentration of NO induced neuronal cell death. On the other hand, low concentration of NO inhibited cell death induced by oxidative stress. This suggests that cell survival effect is NO-dependent.


Keyword:
Nitrosated Polyamines/ Nitric Oxide/ Controlled Release/ Cell Culture

Published online: September 15, 2009
© Copyright, 2009 by The Society of Polymer Science, Japan

NatureAbstract (Nature)


SPARC Japan

Terms of Use | Privacy Policy