CD29 靶向近红外光免疫治疗(NIR-PIT)在治疗色素性黑素瘤模型中的应用。

CD29 targeted near-infrared photoimmunotherapy (NIR-PIT) in the treatment of a pigmented melanoma model.

机构信息

Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA.

出版信息

Oncoimmunology. 2022 Jan 4;11(1):2019922. doi: 10.1080/2162402X.2021.2019922. eCollection 2022.

Abstract

Near-infrared photoimmunotherapy (NIR-PIT) is a newly developed cancer treatment that utilizes an antibody-photoabsorber-conjugate (AbPC) combined with NIR light. The AbPC is injected and binds to the tumor whereupon NIR light irradiation causes a photochemical reaction that selectively kills cancer cells. NIR-PIT is ideal for surface-located skin cancers such as melanoma. However, there is concern that the pigment in melanoma lesions could interfere with light delivery, rendering treatment ineffective. We investigated the efficacy of CD29- and CD44-targeted NIR-PIT (CD29-PIT and CD44-PIT, respectively) in the B16 melanoma model, which is highly pigmented. While CD29-PIT and CD44-PIT killed B16 cells and , CD29-PIT suppressed tumor growth more efficiently. Ki67 expression showed that cells surviving CD29-PIT were less proliferative, suggesting that CD29-PIT was selective for more proliferative cancer cells. CD29-PIT did not kill immune cells, whereas CD44-PIT killed both T and NK cells and most myeloid cells, including DCs, which could interfere with the immune response to NIR-PIT. The addition of anti-CTLA4 antibody immune checkpoint inhibitor (ICI) to CD29-PIT increased the infiltration of CD8 T cells and enhanced tumor suppression with prolonged survival. Such effects were less prominent when the anti-CTLA4 ICI was combined with CD44-PIT. The preservation of immune cells in the tumor microenvironment (TME) after CD29-PIT likely led to a better response when combined with anti-CTLA4 treatment. We conclude that NIR-PIT can be performed in pigmented melanomas and that CD29 is a promising target for NIR-PIT, which is amenable to combination therapy with other immunotherapies.

摘要

近红外光免疫治疗(NIR-PIT)是一种新开发的癌症治疗方法,利用抗体-光吸收剂-缀合物(AbPC)与近红外光结合。AbPC 被注射并与肿瘤结合,随后近红外光照射引起光化学反应,选择性地杀死癌细胞。NIR-PIT 非常适合位于皮肤表面的癌症,如黑色素瘤。然而,人们担心黑色素瘤病变中的色素会干扰光的传递,使治疗无效。我们研究了靶向 CD29 和 CD44 的 NIR-PIT(分别为 CD29-PIT 和 CD44-PIT)在高度色素沉着的 B16 黑色素瘤模型中的疗效。虽然 CD29-PIT 和 CD44-PIT 杀死了 B16 细胞和 ,但 CD29-PIT 更有效地抑制了肿瘤生长。Ki67 表达表明,存活的 CD29-PIT 细胞增殖能力较弱,这表明 CD29-PIT 对更具增殖能力的癌细胞具有选择性。CD29-PIT 不会杀死免疫细胞,而 CD44-PIT 则杀死 T 细胞和 NK 细胞以及大多数髓样细胞,包括 DC,这可能会干扰对 NIR-PIT 的免疫反应。将抗 CTLA4 抗体免疫检查点抑制剂(ICI)添加到 CD29-PIT 中可增加 CD8 T 细胞的浸润,并通过延长存活时间增强肿瘤抑制作用。当抗 CTLA4 ICI 与 CD44-PIT 联合使用时,这种效果不太明显。CD29-PIT 后肿瘤微环境(TME)中免疫细胞的保留可能导致与抗 CTLA4 治疗联合使用时产生更好的反应。我们得出结论,NIR-PIT 可在色素沉着的黑色素瘤中进行,CD29 是 NIR-PIT 的一个有前途的靶点,适合与其他免疫疗法联合治疗。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f602/8741294/8999a5c96be0/KONI_A_2019922_F0001_OC.jpg

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