N 1,N 12 -Diacyl Spermines: SAR Studies on Non-viral Lipopolyamine Vectors for Plasmid DNA and siRNA Formulation
作者:Hassan M. Ghonaim、Shi Li、Ian S. Blagbrough
DOI:10.1007/s11095-008-9764-3
日期:2010.1
To study the efficiency of novel synthetic N 1,N 12-diacyl spermines on DNA and siRNA binding, and to compare their transfection efficiency with viability in cell lines. Five long chain N 1,N 12-diacyl lipopolyamines: N 1,N 12-[didecanoyl, dimyristoyl, dimyristoleoyl, distearoyl and dioleoyl]-1,12-diamino-4,9-diazadodecane were synthesized from the naturally occurring polyamine spermine. Their abilities to condense DNA and to form nanoparticles were characterized. Transfection efficiencies were studied in FEK4 primary skin cells and in an immortalized cancer cell line (HtTA), and compared with N 4,N 9-regioisomers. Also, the abilities of these novel compounds to bind to siRNA-forming nanoparticles were studied using a RiboGreen intercalation assay, and their abilities to deliver fluorescein-tagged siRNA into cells were quantified and compared with TransIT-TKO. By incorporating two long aliphatic chains and varying their acylation position, length, and oxidation state in a stepwise manner, we show efficient p and siRNA formulation and delivery to primary skin and cancer cell lines. Although two C14 chains (both saturated or both mono-cis-unsaturated) were efficient transfecting agents, they were highly toxic. N 1,N 12-Dioleoyl spermine efficiently binds to and delivers pDNA and siRNA with high cell viability even in a primary skin cell line. It is a novel, efficient non-viral vector in the presence of serum.
研究新型合成 N 1,N 12-二乙酰精胺与 DNA 和 siRNA 的结合效率,并比较它们的转染效率和细胞系的存活率。五种长链 N 1,N 12-二酰脂多胺:N 1,N 12-[二癸酰基、二肉豆蔻酰基、二肉豆蔻油酰基、二硬脂酰基和二油酰基]-1,12-二氨基-4,9-二氮杂十二烷是由天然多胺精胺合成的。对它们凝聚 DNA 和形成纳米颗粒的能力进行了表征。研究了 FEK4 原始皮肤细胞和永生癌细胞系(HtTA)的转染效率,并与 N 4,N 9-regioisomers 进行了比较。此外,还利用 RiboGreen 插层试验研究了这些新型化合物与 siRNA 形成的纳米颗粒结合的能力,并对它们向细胞递送荧光素标记 siRNA 的能力进行了量化,并与 TransIT-TKO 进行了比较。通过加入两条长脂肪族链,并逐步改变它们的酰化位置、长度和氧化态,我们展示了高效的 p 和 siRNA 制剂,并将其输送到原代皮肤细胞系和癌细胞系。虽然两种 C14 链(均为饱和或均为单顺式不饱和)都是高效的转染剂,但它们都有剧毒。N 1,N 12-二油酰精胺能有效地与 pDNA 和 siRNA 结合并传递它们,即使在原代皮肤细胞系中也有很高的细胞活力。在血清存在的情况下,它是一种新型、高效的非病毒载体。