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Targeting Triple Negative Breast Cancer Cells with Novel Cytotoxic Peptide-Doxorubicin Conjugates.
Bioconjugate Chemistry ( IF 4.0 ) Pub Date : 2019-11-26 , DOI: 10.1021/acs.bioconjchem.9b00755
Elmira Ziaei 1 , Azam Saghaeidehkordi 1 , Cassandra Dill 1 , Innokentiy Maslennikov 1 , Shiuan Chen 2 , Kamaljit Kaur 1
Affiliation  

In this study, we have designed and synthesized two novel peptide-drug conjugates (PDCs) where the drug, doxorubicin (Dox), is linked to the peptide via a succinimidyl thioether bond or a hydrazone linker. A highly specific and proteolytically stable breast cancer cell targeting peptide (WxEAAYQrFL) is conjugated to Dox to synthesize peptide-Dox thioether (1) or hydrazone (2) conjugate. The evaluation of the stability in water, media, and human serum showed that the conjugate 1 with the succinimidyl thioether linkage is more stable compared to the acid-sensitive hydrazone containing conjugate 2. The cytotoxicity studies showed that the two PDCs were as toxic as free Dox toward the triple negative breast cancer (TNBC) cells and were 7-30 times less toxic (IC50 1.2-4.7 μM for TNBC cells versus 15-39 μM for noncancerous cells) toward the noncancerous breast cells compared to the free doxorubicin (IC50 0.35-1.5 μM for TNBC cells versus 0.24 μM for noncancerous cells). The results from the comparative study of the two PDCs suggest that both may have translational potential for TNBC treatment.

中文翻译:

靶向具有新型细胞毒性肽-阿霉素结合物的三阴性乳腺癌细胞。

在这项研究中,我们设计并合成了两种新型的肽-药物偶联物(PDC),其中的药物阿霉素(Dox)通过琥珀酰亚胺基硫醚键或link连接子与肽连接。将高度特异性和蛋白水解稳定的乳腺癌细胞靶向肽(WxEAAYQrFL)与Dox偶联,以合成肽-Dox硫醚(1)或(2)偶联物。在水,培养基和人血清中的稳定性评估表明,与含有琥珀酰亚胺基硫醚键的缀合物1相比,含酸敏感性的缀合物2更稳定。细胞毒性研究表明,两个PDC的毒性与游离的一样。 Dox朝向三阴性乳腺癌(TNBC)细胞,毒性降低7-30倍(IC50 1.2-4。相对于游离阿霉素,TNBC细胞为7μM,非癌细胞为15-39μM(TN50细胞为IC50 0.35-1.5μM,非癌细胞为IC50)。两种PDC的比较研究结果表明,两者都可能具有TNBC治疗的翻译潜力。
更新日期:2019-11-28
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