Development of Siglec-9 Blocking Antibody to Enhance Anti-Tumor Immunity.

Development of Siglec-9 Blocking Antibody to Enhance Anti-Tumor Immunity.
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DOI:
10.3389/fonc.2021.778989
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发表时间:
2021
影响因子:
4.7
通讯作者:
Muthumani K
Muthumani K
中科院分区:
医学3区
文献类型:
--
作者:
Choi H;Ho M;Adeniji OS;Giron L;Bordoloi D;Kulkarni AJ;Puchalt AP;Abdel-Mohsen M;Muthumani K

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唾液酸结合免疫球蛋白样凝集素-9 (Siglec-9)是一种糖免疫阴性检查点,在几种免疫细胞上表达。siglece -9通过结合在癌细胞上表达的唾液聚糖配体发挥其抑制作用,使其能够逃避免疫监视。我们用siglece -9编码DNA和siglece -9蛋白免疫小鼠,建立了一组人类抗siglece -9杂交瘤克隆。通过克隆筛选,鉴定出针对siglece -9具有高特异性和功能性的先导抗体。体外细胞毒性实验表明,我们的先导抗体具有较强的抗肿瘤免疫活性。此外,利用卵巢癌人源化小鼠模型进行的体内试验显示,肿瘤体积显著减少。我们共同开发了新型抗体,通过干扰siglece -9介导的免疫抑制来增强抗肿瘤免疫。
Sialic acid-binding Immunoglobulin-like lectin-9 (Siglec-9) is a glyco-immune negative checkpoint expressed on several immune cells. Siglec-9 exerts its inhibitory effects by binding to sialoglycan ligands expressed on cancer cells, enabling them to evade immunosurveillance. We developed a panel of human anti-Siglec-9 hybridoma clones by immunizing mice with Siglec-9-encoding DNA and Siglec-9 protein. The lead antibodies, with high specificity and functionality against Siglec-9, were identified through screening of clones. The in vitro cytotoxicity assays showed that our lead antibody enhances anti-tumor immune activity. Further, in vivo testing utilizing ovarian cancer humanized mouse model showed a drastic reduction in tumor volume. Together, we developed novel antibodies that augment anti-tumor immunity through interference with Siglec-9-mediated immunosuppression.
唾液酸及其对人类 NK 细胞功能的影响。
DOI: 10.3390/cells10020263
发表时间: 2021-01-29
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