开发用于鼻咽癌肽受体放射性核素治疗的[177Lu]Lu-LNC1010。
Development of [177Lu]Lu-LNC1010 for peptide receptor radionuclide therapy of nasopharyngeal carcinoma.
发表日期:2024 Aug 15
作者:
Jianhao Chen, Yizhen Pang, Xiyi Liao, Yangfan Zhou, Qicong Luo, Hua Wu, Changjing Zuo, Jingjing Zhang, Qin Lin, Xiaoyuan Chen, Liang Zhao, Haojun Chen
来源:
Eur J Nucl Med Mol I
摘要:
生长抑素受体2(SSTR2)靶向放射性药物[68Ga]Ga-DOTATATE在鼻咽癌(NPC)的诊断中具有潜在优势。本研究介绍了一种新型长效 SSTR2 类似物 LNC1010,它基于 DOTATATE、截短的伊文思蓝结合部分和聚乙二醇接头。我们假设肽受体放射性核素疗法 (PRRT) 使用 [177Lu]Lu-LNC1010 比使用 [177Lu]Lu-DOTATATE 治疗转移性 NPC 更有效。我们使用 C666-1 NPC 细胞和体内评估了 LNC1010 的体外结合特性。通过 PET 和 SPECT 成像、生物分布研究和 PRRT,研究了 [68Ga]Ga/[177Lu]Lu-LNC1010 在 C666-1 NPC 异种移植物中的体内药代动力学,并将其与 [68Ga]Ga/[177Lu] Lu 标记的 DOTATATE 进行比较。此外,在患有转移性 NPC 的患者中进行了成像和治疗的概念验证方法。LNC1010 在 C666-1 NPC 细胞中表现出对 SSTR2 的强烈摄取和特异性亲和力。 PET 和 SPECT 成像显示,在 C666-1 NPC 异种移植物中,[68Ga]Ga/[177Lu]Lu-LNC1010 比 [68Ga]Ga/[177Lu]Lu-DOTATATE 具有更高的摄取率和更长的肿瘤保留时间,表明其适合在 NPC 中应用 PRRT 。生物分布研究证实,[177Lu]Lu-LNC1010 比 [177Lu]Lu-DOTATATE 具有更高的吸收率和更长的保留时间。在临床前 PRRT 研究中,[177Lu]Lu-LNC1010 对 C666-1 NPC 异种移植物中的肿瘤生长表现出比 [177Lu]Lu-DOTATATE 更大的抑制作用。在随后的一项初步临床研究中,使用 [177Lu]Lu-LNC1010 进行 PRRT 在转移性 NPC 患者中取得了良好的治疗效果且副作用可忽略不计。[177Lu]Lu-LNC1010 证明 SSTR2 阳性 NPC 中的肿瘤摄取增加并延长了保留时间,具有优越的治疗效果。临床前研究中的抗肿瘤功效与 [177Lu]Lu-DOTATATE 相当。这些发现表明,[177Lu]Lu-LNC1010 的 PRRT 是治疗晚期鼻咽癌的一种有前途的治疗方法,将 PRRT 的临床范围扩展到神经内分泌肿瘤之外。© 2024。作者获得 Springer-Verlag GmbH 德国的独家许可,部分施普林格自然。
Somatostatin Receptor 2 (SSTR2)-targeted radiopharmaceutical [68Ga]Ga-DOTATATE has potential advantages in the diagnosis of nasopharyngeal carcinoma (NPC). This study introduces a novel long-lasting SSTR2 analogue, LNC1010, based on DOTATATE, a truncated Evans blue-binding moiety, and a polyethylene-glycol linker. We hypothesised that peptide receptor radionuclide therapy (PRRT) is more effective with [177Lu]Lu-LNC1010 than with [177Lu]Lu-DOTATATE in treating metastatic NPC.We assessed binding characteristics of LNC1010 in vitro using C666-1 NPC cells and in-vivo pharmacokinetics of [68Ga]Ga/[177Lu]Lu-LNC1010 in C666-1 NPC xenografts via PET and SPECT imaging, biodistribution studies, and PRRT, and compared them with [68Ga]Ga/[177Lu] Lu-labelled DOTATATE. Furthermore, a proof-of-concept approach for imaging and therapy was conducted in a patient with metastatic NPC.LNC1010 exhibited strong uptake and specific affinity for SSTR2 in C666-1 NPC cells. PET and SPECT imaging demonstrated higher uptake and longer tumour retention of [68Ga]Ga/[177Lu]Lu-LNC1010 than [68Ga]Ga/[177Lu]Lu-DOTATATE in C666-1 NPC xenografts, indicating its suitability for PRRT applications in NPCs. Biodistribution studies confirmed the higher uptake and prolonged retention of [177Lu]Lu-LNC1010 than [177Lu]Lu-DOTATATE. In preclinical PRRT studies, [177Lu]Lu-LNC1010 showed greater inhibition of tumour growth in C666-1 NPC xenografts than [177Lu]Lu-DOTATATE. In a subsequent pilot clinical study, PRRT with [177Lu]Lu-LNC1010 achieved favourable therapeutic and negligible side effects in a patient with metastatic NPC.[177Lu]Lu-LNC1010 demonstrated increased tumour uptake and prolonged retention in SSTR2-positive NPCs, with superior anti-tumour efficacy to that of [177Lu]Lu-DOTATATE in preclinical studies. These findings suggest that PRRT with [177Lu]Lu-LNC1010 is a promising treatment for advanced NPC, extending the clinical scope of PRRT beyond neuroendocrine tumours.© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.