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首页> 外文期刊>International journal of molecular medicine >Induction of tumor cell apoptosis by a novel class of N-thiolated beta-lactam antibiotics with structural modifications at N1 and C3 of the lactam ring.
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Induction of tumor cell apoptosis by a novel class of N-thiolated beta-lactam antibiotics with structural modifications at N1 and C3 of the lactam ring.

机译:新型内酰胺环N1和C3结构修饰的新型N-硫代β-内酰胺类抗生素诱导的肿瘤细胞凋亡。

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The investigation of novel anti-tumor agents that preferentially select for malignant cells with a tolerable toxicity level has been the focus of anti-cancer drug discovery. Our laboratories have previously reported that certain N-alkylthiolated beta-lactams had DNA-damaging and apoptosis-inducing activity in various tumor lines but not in nontransformed cells. In the current study, we further delineated the effects of substitutions at C3 or N1 of the lactam ring for cell death-inducing capability with close attention paid to a discernible structure-activity relationship (SAR). We found that two beta-lactam analogs (JG-5 and JG-19), both containing a branched-chain moiety at C3 of the lactam ring, exhibit potent apoptosis-inducing activity. Additionally, JG-5 exhibited superior in vitro biological activity over JG-19 owing to structural modifications made to substituents at the N1 and C3 positions of the lactam ring. Furthermore, the branched beta-lactams were able to inhibit growth of mice bearing breast cancer xenografts, associated with induction of DNA damage and apoptosis in tumor tissues. Our results strongly warrant further investigation into these novel beta-lactams as potential anti-cancer therapeutics.
机译:优先选择具有可耐受毒性水平的恶性细胞的新型抗肿瘤药物的研究一直是抗癌药物发现的重点。我们的实验室以前曾报道过,某些N-烷硫基化的β-内酰胺在各种肿瘤细胞系中均具有破坏DNA和诱导细胞凋亡的活性,但在未转化的细胞中则没有。在当前的研究中,我们进一步描述了内酰胺环的C3或N1取代对细胞死亡诱导能力的影响,并密切关注可分辨的结构-活性关系(SAR)。我们发现两个β-内酰胺类似物(JG-5和JG-19)都在内酰胺环的C3处都含有支链部分,它们显示出有效的细胞凋亡诱导活性。此外,由于对内酰胺环的N1和C3位置的取代基进行了结构修饰,因此JG-5的体外生物学活性优于JG-19。此外,支链β-内酰胺能够抑制携带乳腺癌异种移植物的小鼠的生长,这与DNA损伤的诱导和肿瘤组织的凋亡有关。我们的研究结果有力地证明了对这些新型β-内酰胺类作为潜在抗癌治疗剂的进一步研究。

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