Abstract:
:A series of tocopherol-based cationic lipid 3a-3f bearing a pH-sensitive imidazole moiety in the dipeptide headgroup and a reduction-responsive disulfide linkage were designed and synthesized. Acid-base titration of these lipids showed good buffering capacities. The liposomes formed from 3 and co-lipid 1, 2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) could efficiently bind and condense DNA into nanoparticles. Gel binding and HPLC assays confirmed the encapsulated DNA could release from lipoplexes 3 upon addition of 10 mM glutathione (GSH). MTT assays in HEK 293 cells demonstrated that lipoplexes 3 had low cytotoxicity. The in vitro gene transfection studies showed cationic dipeptide headgroups clearly affected the transfection efficiency (TE), and arginine-histidine based dipeptide lipid 3f give the best TE, which was 30.4 times higher than Lipofectamine 3000 in the presence of 10% serum. Cell-uptake assays indicated that basic amino acid containing dipeptide cationic lipids exhibited more efficient cell uptake than serine and aromatic amino acids based dipeptide lipids. Confocal laser scanning microscopy (CLSM) studies corroborated that 3 could efficiently deliver and release DNA into the nuclei of HeLa cells. These results suggest that tocopherol-based dipeptide cationic lipids with pH and reduction dual-sensitive characteristics might be promising non-viral gene delivery vectors.
journal_name
Eur J Med Chemjournal_title
European journal of medicinal chemistryauthors
Liu Q,Su RC,Yi WJ,Zheng LT,Lu SS,Zhao ZGdoi
10.1016/j.ejmech.2017.02.010subject
Has Abstractpub_date
2017-03-31 00:00:00pages
1-11eissn
0223-5234issn
1768-3254pii
S0223-5234(17)30074-0journal_volume
129pub_type
杂志文章abstract::Cannabinoids are potentially useful for the treatment of several diseases. In the present work, we report the syntheses and biological evaluations of 1,2,4-triazolone derivatives designed using a combined approach of scaffold hopping and pharmacophore-oriented method. These compounds exhibited interesting antagonistic...
journal_title:European journal of medicinal chemistry
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journal_title:European journal of medicinal chemistry
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journal_title:European journal of medicinal chemistry
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journal_title:European journal of medicinal chemistry
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