Distance of hydroxyl functionality from the quaternized center influence DNA binding and in vitro gene delivery efficacies of cationic lipids with hydroxyalkyl headgroups.
In vitro gene delivery efficacies of cationic amphiphiles 1-7 (Scheme 1) were measured by both the reporter gene expression assays in CHO, COS-1, HepG2, and MCF7 cells and by the whole cell histochemical X-gal staining of representative Chinese hamster ovary cells. Our results demonstrated that in vitro gene delivery efficiencies of cationic lipids with hydroxyalkyl headgroups are adversely affected by increased covalent distances between the hydroxyl functionality and the cationic centers. Findings in the DNase I protection experiments and transmission electron microscopic study support the notion that such compromised gene delivery efficacies may originate from poor lipid-DNA binding interactions and significantly increased lipoplex nanosizes.
Mahidhar
Yenugonda Venkata
YV
Division of Lipid Science and Technology, Indian Institute of Chemical Technology, Hyderabad-500 007, India.
Rajesh
Mukthavaram
M
Madhavendra
Sunkara Sakunthala
SS
Chaudhuri
Arabinda
A
D000818:Animals; D002412:Cations; D002460:Cell Line; D002522:Chlorocebus aethiops; D006224:Cricetinae; D003412:Cricetulus; D004247:DNA / Q000008:administration & dosage* / Q000737:chemistry; D003850:Deoxyribonuclease I / Q000737:chemistry; D018014:Gene Transfer Techniques; D017930:Genes, Reporter; D006651:Histocytochemistry; D006801:Humans; D008055:Lipids / Q000138:chemical synthesis* / Q000737:chemistry / Q000633:toxicity; D046529:Microscopy, Electron, Transmission; D000644:Quaternary Ammonium Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000633:toxicity; D013329:Structure-Activity Relationship; D014162:Transfection; D001616:beta-Galactosidase / Q000096:biosynthesis / Q000235:genetics
D002412:Cations; D008055:Lipids; D000644:Quaternary Ammonium Compounds; D004247:DNA; D003850:Deoxyribonuclease I; D001616:beta-Galactosidase