Hematological toxicity of [225Ac]Ac-PSMA-617 and [177Lu]Lu-PSMA-617 in RM1-PGLS syngeneic mouse model

IF 4.4 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Meryl Maria Vilangattil, Abir Swaidan, Jonathan Godinez, Marco F. Taddio, Johannes Czernin, Christine E. Mona, Giuseppe Carlucci
{"title":"Hematological toxicity of [225Ac]Ac-PSMA-617 and [177Lu]Lu-PSMA-617 in RM1-PGLS syngeneic mouse model","authors":"Meryl Maria Vilangattil,&nbsp;Abir Swaidan,&nbsp;Jonathan Godinez,&nbsp;Marco F. Taddio,&nbsp;Johannes Czernin,&nbsp;Christine E. Mona,&nbsp;Giuseppe Carlucci","doi":"10.1186/s41181-025-00333-y","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p>Prostate cancer (PC) has a 34% 5-year survival rate after progressing to metastatic castration-resistant prostate cancer (mCRPC), which occurs in 20–30% of cases. Treatments like chemotherapy, immunotherapy, and PSMA-targeted radioligand therapy (RLT) show promise, but challenges remain with tumor resistance, side effects, and dose-limiting toxicity in kidneys and bone marrow. This study investigated the hematotoxicity, treatment efficacy, and recovery after [<sup>177</sup>Lu]Lu-PSMA-617 and [<sup>225</sup>Ac]Ac-PSMA-617 treatment in a syngeneic PC mouse model.</p><h3>Method</h3><p>Twenty-five male C57BL/6 mice were inoculated with RM1-PGLS cells and monitored using [<sup>68</sup>Ga]Ga-PSMA-11 PET/CT. The mice were divided into five groups as follows: (1) [<sup>225</sup>Ac]Ac-PSMA-617 treatment with tumors, (2) [<sup>177</sup>Lu]Lu-PSMA-617 treatment with tumors, (3) control group with tumors, (4) [<sup>225</sup>Ac]Ac-PSMA-617 treatment without tumors, and (5) [<sup>177</sup>Lu]Lu-PSMA-617 treatment without tumors. Tumor volume was measured weekly, and animals were sacrificed when tumors reached 1.5 cm³. Endpoint criteria included tumor size, survival, and body mass. Blood samples were collected at different time points to assess blood cell counts and liver and kidney function.</p><h3>Results</h3><p>Both treatments significantly slowed tumor progression and extended survival. [<sup>225</sup>Ac]Ac-PSMA-617-treated mice had a median survival of 70 days, compared to 58 days for [<sup>177</sup>Lu]Lu-PSMA-617-treated mice and 30 days for the control group. Tumor volumes were significantly reduced in both treatment groups (<i>P</i> &lt; 0.05). Hematological analysis showed that both treatments reduced WBCs, RBCs, and platelets, but values normalized within 35–42 days. Liver and kidney functions remained unaffected, and no significant renal or hepatic toxicity was observed.</p><h3>Conclusion</h3><p>Both [<sup>225</sup>Ac]Ac-PSMA-617 and [<sup>177</sup>Lu]Lu-PSMA-617 caused transient hematotoxicity without prolonged effects. The data do not explicitly support the necessity of immunocompetent models for studying therapeutic outcomes in this context. Future studies incorporating immune profiling are warranted to investigate immune system interactions in radioligand therapy further.</p></div>","PeriodicalId":534,"journal":{"name":"EJNMMI Radiopharmacy and Chemistry","volume":"10 1","pages":""},"PeriodicalIF":4.4000,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ejnmmipharmchem.springeropen.com/counter/pdf/10.1186/s41181-025-00333-y","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"EJNMMI Radiopharmacy and Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1186/s41181-025-00333-y","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0

Abstract

Background

Prostate cancer (PC) has a 34% 5-year survival rate after progressing to metastatic castration-resistant prostate cancer (mCRPC), which occurs in 20–30% of cases. Treatments like chemotherapy, immunotherapy, and PSMA-targeted radioligand therapy (RLT) show promise, but challenges remain with tumor resistance, side effects, and dose-limiting toxicity in kidneys and bone marrow. This study investigated the hematotoxicity, treatment efficacy, and recovery after [177Lu]Lu-PSMA-617 and [225Ac]Ac-PSMA-617 treatment in a syngeneic PC mouse model.

Method

Twenty-five male C57BL/6 mice were inoculated with RM1-PGLS cells and monitored using [68Ga]Ga-PSMA-11 PET/CT. The mice were divided into five groups as follows: (1) [225Ac]Ac-PSMA-617 treatment with tumors, (2) [177Lu]Lu-PSMA-617 treatment with tumors, (3) control group with tumors, (4) [225Ac]Ac-PSMA-617 treatment without tumors, and (5) [177Lu]Lu-PSMA-617 treatment without tumors. Tumor volume was measured weekly, and animals were sacrificed when tumors reached 1.5 cm³. Endpoint criteria included tumor size, survival, and body mass. Blood samples were collected at different time points to assess blood cell counts and liver and kidney function.

Results

Both treatments significantly slowed tumor progression and extended survival. [225Ac]Ac-PSMA-617-treated mice had a median survival of 70 days, compared to 58 days for [177Lu]Lu-PSMA-617-treated mice and 30 days for the control group. Tumor volumes were significantly reduced in both treatment groups (P < 0.05). Hematological analysis showed that both treatments reduced WBCs, RBCs, and platelets, but values normalized within 35–42 days. Liver and kidney functions remained unaffected, and no significant renal or hepatic toxicity was observed.

Conclusion

Both [225Ac]Ac-PSMA-617 and [177Lu]Lu-PSMA-617 caused transient hematotoxicity without prolonged effects. The data do not explicitly support the necessity of immunocompetent models for studying therapeutic outcomes in this context. Future studies incorporating immune profiling are warranted to investigate immune system interactions in radioligand therapy further.

[225Ac]Ac-PSMA-617和[177Lu]Lu-PSMA-617在RM1-PGLS同基因小鼠模型中的血液毒性
前列腺癌(PC)进展为转移性去势抵抗性前列腺癌(mCRPC)后的5年生存率为34%,发生在20-30%的病例中。化疗、免疫治疗和psma靶向放射配体治疗(RLT)等治疗显示出希望,但肿瘤耐药性、副作用和肾和骨髓剂量限制性毒性等挑战仍然存在。本研究研究了[177Lu]Lu-PSMA-617和[225Ac]Ac-PSMA-617在同基因PC小鼠模型中的血液毒性、治疗效果和恢复情况。方法25只雄性C57BL/6小鼠接种RM1-PGLS细胞,采用[68Ga]Ga-PSMA-11 PET/CT进行监测。将小鼠分为5组:(1)[225Ac]Ac-PSMA-617肿瘤组,(2)[177Lu]Lu-PSMA-617肿瘤组,(3)肿瘤对照组,(4)[225Ac]Ac-PSMA-617无肿瘤组,(5)[177Lu]Lu-PSMA-617无肿瘤组。每周测量肿瘤体积,当肿瘤达到1.5 cm³时处死动物。终点标准包括肿瘤大小、生存和体重。在不同时间点采集血液样本,评估血细胞计数和肝肾功能。结果两种治疗均能显著减缓肿瘤进展,延长生存期。[225Ac] ac - psma -617治疗小鼠的中位生存期为70天,而[177Lu] lu - psma -617治疗小鼠的中位生存期为58天,对照组为30天。两组患者肿瘤体积均显著减小(P < 0.05)。血液学分析显示,两种治疗方法均能降低白细胞、红细胞和血小板,但在35-42天内恢复正常。肝脏和肾脏功能未受影响,未观察到明显的肾或肝毒性。结论[225Ac]Ac-PSMA-617和[177Lu]Lu-PSMA-617均引起短暂性血液毒性,无长期影响。这些数据并没有明确支持在这种情况下研究治疗结果的免疫活性模型的必要性。未来的研究需要结合免疫谱进一步研究放射配体治疗中免疫系统的相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
7.20
自引率
8.70%
发文量
30
审稿时长
5 weeks
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信