excision

Niraparib tosylate monohyrate 也称为 MK-4827，是一种聚 (ADP-核糖) 聚合酶 (PARP) 抑制剂，具有潜在的抗肿瘤活性。 MK4827 抑制 PARP 活性，增强 DNA 链断裂的积累，促进基因组不稳定性和细胞凋亡。 PARP 蛋白家族通过碱基切除修复 (BER) 途径检测和修复单链 DNA 断裂。

Methoxyamine HCl (Methoxyamine) 与脱嘌呤 脱嘧啶 (AP) DNA 损伤位点共价结合并抑制碱基切除修复 (BER)，这可能导致 DNA 链断裂和细胞凋亡增加。 Methoxyamine 是一种具有潜在佐剂活性的口服生物可利用的小分子抑制剂。该药剂可增强烷化剂的抗肿瘤活性。

CRT0044876 (7-NO2-ICA) 是一种高选择性的嘌呤 嘧啶核苷核酸内切酶 1 抑制剂，IC50约为 3 μM。它也是 APE1 所属的核酸外切酶 III 家族的特异性抑制剂，可抑制 APE1 的 AP 内切酶、3′-磷酸二酯酶和 3′-磷酸酶活性，可增强几种 DNA 碱基靶向化合物的细胞毒性。

ERCC1-XPF-IN-2 在核苷酸切除修复、顺铂增强和 γH2AX 测定中具有活性。ERCC1-XPF-IN-2 是 ERCC1-XPF 核酸内切酶的有效抑制剂，IC50值为 0.6 μM。

TIQ-A 是一种 PARP1 抑制剂，通过碱基切除修复途径参与 DNA 单链断裂修复。 PARP1 由 DNA 损伤触发，其过度激活已被认为是许多病理状况的致病因素，包括缺血和再灌注损伤、哮喘相关炎症和动脉粥样硬化形成。

Niraparib hydrochloride (MK-4827 hydrochloride) 是一种具有口服活性的PARP1和PARP2抑制剂，IC50值分别为 3.8 nM 和 2.1 nM。它抑制 DNA 损伤修复，诱导凋亡并具有抗肿瘤活性。

Pamiparib is a highly potent and selective PARP inhibitor. BGB-290 selectively binds to PARP and prevents PARP-mediated repair of single-strand DNA breaks via the base-excision repair (BER) pathway. This enhances the accumulation of DNA strand breaks, pro

APE1-IN-2（compound AP1）是一种具有抗癌活性的Pt(IV)前体，靶向BER关键蛋白APE1。该化合物能诱导细胞内铂的积累，并激活DNA损伤反应及凋亡信号。

Nemorubicin HCL is the salt form of Nemorubicin, also known as PNU152243A, a doxorubicin derivative that differs significantly from its parent drug in terms of spectrum of antitumor activity, metabolism and toxicity profile. The drug is active on tumors resistant to alkylating agents, topoisomerase II inhibitors and platinum derivatives. It works primarily through topoisomerase I inhibition. Of note, Nemorubicin is active in cells with upregulation of the nucleotide excision repair (NER) pathway, where current therapies fail. Nemorubicin is biotransformed in the liver into cytotoxic metabolites that may further contribute to render this drug highly active against primary liver tumors or liver metastases.

Pamiparib, also known as BGB-290, is a highly potent and selective PARP inhibitor with favorable drug metabolism and pharmacokinetic properties. BGB-290 selectively binds to PARP and prevents PARP-mediated repair of single-strand DNA breaks via the base-excision repair (BER) pathway. This enhances the accumulation of DNA strand breaks, promotes genomic instability, and eventually leads to apoptosis. BGB-290 may both potentiate the cytotoxicity of DNA-damaging agents and reverse tumor cell chemo- and radioresistance.

NTPO trisodium 是一种 DNA 损伤诱导剂，会导致基因组 DNA 损伤和断裂，并激活 ATR 介导的细胞周期检查点。NTPO trisodium 导致的 DNA 损伤效果可以通过碱基切除修复（BER）而非核苷酸切除修复（NER）来消除。

Merbarone is a Type II DNA topoisomerase inhibitor. Merbarone inhibits the catalytic activity of human topoisomerase IIalpha by blocking DNA cleavage. Merbarone induces activation of caspase-activated DNase and excision of chromosomal DNA loops from the n

Defensin HNP-3 human 是一种具有抑制金黄色葡萄球菌、铜绿假单胞菌和大肠杆菌活性的细胞毒性抗生素肽。该肽原先以94个氨基酸的preproHNP(1-94)形式合成，随后水解为proHNP(20-94)，最终通过去除阴离子前体转化为成熟形式的HNP(65-94)。