Synthesis and Structure−Activity Relationship Effects on the Tumor Avidity of Radioiodinated Phospholipid Ether Analogues
作者:Anatoly N. Pinchuk、Mark A. Rampy、Marc A. Longino、R. W. Scott Skinner、Milton D. Gross、Jamey P. Weichert、Raymond E. Counsell
DOI:10.1021/jm050252g
日期:2006.4.1
retention of these compounds in tumors is the length of the alkyl chain that determines their hydrophobic properties. Decreasing the chain length from C12 to C7 resulted in little or no tumor accumulation and rapid clearance of the compound in tumor-bearing rats within 24 h of administration. Increasing the chain length had the opposite effect, with the C15 and C18 analogues displaying delayed plasma clearance
放射性碘化的磷脂醚类似物在异种移植和自发性啮齿动物模型中显示出显着的选择性蓄积在多种人类和动物肿瘤中的能力。据信,这种肿瘤亲和力是由于肿瘤与相应的正常组织之间的代谢差异而引起的。这项研究的结果表明,这些化合物在肿瘤中保留的一个因素是决定其疏水性的烷基链的长度。从C12到C7的链长减少导致荷瘤大鼠在给药后24小时内几乎没有或没有肿瘤累积,并且化合物的快速清除。增加链长会产生相反的效果,C15和C18类似物在荷瘤大鼠中显示出延迟的血浆清除和增强的肿瘤吸收和滞留。荷瘤大鼠注射后24小时,丙二醇类似物NM-412和NM-413显示的肿瘤吸收伴随着高水平的肝和腹部放射性。将2-O-甲基部分添加至丙二醇主链也显着延迟了肿瘤的摄取。在携带人PC-3肿瘤的免疫受损小鼠中NM-404及其前身NM-324之间的直接比较显示,与NM-324相比,NM-404的肿瘤摄取和全身清除均显着增强。基于在几种啮齿动物肿瘤