A nanoparticle delivery vehicle for S-nitroso-N-acetyl cysteine: sustained vascular response.
Interest in the development of nitric oxide (NO) based therapeutics has grown exponentially due to its well elucidated and established biological functions. In line with this surge, S-nitroso thiol (RSNO) therapeutics are also receiving more attention in recent years both as potential stable sources of NO as well as for their ability to serve as S-nitrosating agents; S-nitrosation of protein thiols is implicated in many physiological processes. We describe two hydrogel based RSNO containing nanoparticle platforms. In one platform the SNO groups are covalently attached to the particles (SNO-np) and the other contains S-nitroso-N-acetyl cysteine encapsulated within the particles (NAC-SNO-np). Both platforms function as vehicles for sustained activity as trans-S-nitrosating agents. NAC-SNO-np exhibited higher efficiency for generating GSNO from GSH and maintained higher levels of GSNO concentration for longer time (24 h) as compared to SNO-np as well as a previously characterized nitric oxide releasing platform, NO-np (nitric oxide releasing nanoparticles). In vivo, intravenous infusion of the NAC-SNO-np and NO-np resulted in sustained decreases in mean arterial pressure, though NAC-SNO-np induced longer vasodilatory effects as compared to the NO-np. Serum chemistries following infusion demonstrated no toxicity in both treatment groups. Together, these data suggest that the NAC-SNO-np represents a novel means to both study the biologic effects of nitrosothiols and effectively capitalize on its therapeutic potential.
Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY 10461, USA. parimala.nacharaju@einstein.yu.edu
Parimala
P
Nacharaju
Chaim
C
Tuckman-Vernon
Keith E
KE
Maier
Jason
J
Chouake
Adam
A
Friedman
Pedro
P
Cabrales
Joel M
JM
Friedman
D000111:Acetylcysteine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000737:chemistry; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D002245:Carbon Dioxide / Q000097:blood; D006224:Cricetinae; D004337:Drug Carriers / Q000008:administration & dosage / Q000737:chemistry; D005978:Glutathione / Q000378:metabolism; D006339:Heart Rate / Q000187:drug effects; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry; D008297:Male; D008647:Mesocricetus; D053758:Nanoparticles / Q000008:administration & dosage* / Q000737:chemistry*; D010100:Oxygen / Q000097:blood; D026422:S-Nitrosoglutathione / Q000378:metabolism; D026403:S-Nitrosothiols / Q000737:chemistry / Q000494:pharmacology; D014664:Vasodilation / Q000187:drug effects*
D004337:Drug Carriers; D026403:S-Nitrosothiols; D002245:Carbon Dioxide; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; C024940:S-nitroso-N-acetylcysteine; D026422:S-Nitrosoglutathione; D005978:Glutathione; D010100:Oxygen; D000111:Acetylcysteine