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南京中医药大学第二附属医院/江苏省第二中医院呼吸科,江苏 南京 210017
朱益敏,E-mail:efy037@njucm.edu.cn
收稿:2025-12-15,
纸质出版:2026-10-25
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吴明星,曹振东,徐文慧等.IL-36γ介导CD8⁺ T细胞抗肿瘤免疫应答的作用及其分子机制研究[J].局解手术学杂志,2026,35(10):873-878.
WU Ming-xing,CAO Zhen-dong,XU Wen-hui,et al.Research on the functional role and molecular mechanism of IL-36γ mediating CD8⁺ T cells antitumor immune response[J].JOURNAL OF REGIONAL ANATOMY AND OPERATIVE SURGERY,2026,35(10):873-878.
吴明星,曹振东,徐文慧等.IL-36γ介导CD8⁺ T细胞抗肿瘤免疫应答的作用及其分子机制研究[J].局解手术学杂志,2026,35(10):873-878. DOI: 10.11659/jjssx.12E025072.
WU Ming-xing,CAO Zhen-dong,XU Wen-hui,et al.Research on the functional role and molecular mechanism of IL-36γ mediating CD8⁺ T cells antitumor immune response[J].JOURNAL OF REGIONAL ANATOMY AND OPERATIVE SURGERY,2026,35(10):873-878. DOI: 10.11659/jjssx.12E025072.
目的
2
探讨白细胞介素(IL)-36γ对CD8⁺ T细胞程序性死亡受体-1(PD-1)表达及抗肿瘤免疫应答的影响。
方法
2
采用BALB/c和C57BL/6小鼠分别建立CT26.WT结肠癌和B16黑色素瘤模型,每种模型设置vector组和IL-36γ组。比较第14天各组小鼠的肿瘤体积,并检测肿瘤浸润性CD8
+
T细胞中PD-1表达。体外分离CD8
+
T细胞并诱导获得Tc0、Tc1细胞,采用流式细胞术检测不同细胞因子及IL-36γ处理后CD8
+
T细胞中PD-1表达;同时比较IL-36γ对WT与T-bet⁻/⁻来源的CD8⁺ T细胞中PD-1表达的影响。
结果
2
CD8
+
T细胞经干扰素-γ(IFN-γ)和IL-2处理后PD-1平均荧光强度无显著变化(
P
>
0.05),经IL-12、转化生长因子-β(TGF-β)和IL-1β处理后PD-1平均荧光强度升高(
P
<
0.05),而经IL-18、IL-33、IL-36α、IL-36β及IL-36γ处理后PD-1平均荧光强度降低(
P
<
0.05),其中IL-36γ的抑制作用最显著。Tc0和Tc1细胞在IL-36γ处理24、36、48 h后的PD-1阳性细胞比例均低于相应Medium对照(
P
<
0.05)。经IL-36γ处理后,CT26.WT-IL-36γ组和B16-IL-36γ组小鼠的肿瘤体积均显著减小(
P
<
0.05),肿瘤浸润性CD8⁺ T细胞PD-1平均荧光强度显著降低(
P
<
0.05)。在WT来源CD8⁺ T细胞中,IL-36γ处理后PD-1平均荧光强度显著降低(
P
<
0.05);而在T-bet⁻/⁻来源CD8⁺ T细胞中,IL-36γ与Medium处理后PD-1平均荧光强度差异无统计学意义(
P
>
0.05)。
结论
2
IL-36γ可降低CD8⁺ T细胞PD-1表达,并与小鼠肿瘤生长受抑及肿瘤浸润性CD8⁺ T细胞PD-1表达降低相关;T-bet可能参与IL-36γ对PD-1表达的调控,但其具体分子机制仍需进一步验证。
Objective
2
To investigate the effects of interleukin (IL)-36γ on programmed death 1 (PD-1) expression in CD8
+
T cells and the antitumor immune responses.
Methods
2
BALB/c and C57BL/6 mice were used to establish CT26.WT colon carcinoma and B16 melanoma models
,respectively. For each tumor model,mice were assigned to a vector control group or an IL-36γ-overexpression group. The tumor volumes of mice in each group were compared on the 14th day, and the expression of PD-1 in tumor-infiltrating CD8
+
T cells was detected. CD8
+
T cells were isolated in vitro and induced to differentiate into Tc0 and Tc1 subsets. Flow cytometry was used to assess PD-1 expression following treatment with different cytokines or IL-36γ. The effects of IL-36γ on PD-1 expression in CD8
+
T cells derived from WT and T-bet⁻/⁻ mice were also compared.
Results
2
The mean fluorescence intensity of PD-1 in CD8
+
T cells showed no significant change after treatment with interferon -γ(IFN-γ) and IL-2 (
P
>
0.05), while the mean fluorescence intensity of PD-1 increased after treatment with IL-12,transforming growth factor-β(TGF-β) and IL-1β (
P
<
0.05). The mean fluorescence intensity of PD-1 decreased after treatment with IL-18,IL-33,IL-36α,IL-36β and IL-36γ (
P
<
0.05),among which the inhibitory effect of IL-36γ was the most significant.The proportions of PD-1 positive cells in Tc0 and Tc1 cells after treatment with IL-36γ for 24, 36, and 48 hours were all lower than those in the corresponding Medium control (
P
<
0.05). After treatment with IL-36γ, the tumor volumes of mice in both CT26.WT-IL-36γ group and B16-IL-36γ group were significantly reduced (
P
<
0.05),and the mean fluorescence intensity of PD-1 in tumor-infiltrating CD8
+
T cells were significantly decreased (
P
<
0.05). IL-36γ treatment significantly reduced the mean fluorescence intensity of PD-1 in WT-derived CD8
+
T cells,whereas no significant difference in the mean fluorescence intensity of PD-1 was observed in T-bet⁻/⁻-derived CD8
+
T cells which treated with Medium or IL-36γ.
Conclusion
2
IL-36γ can reduce
the expression of PD-1 in CD8
+
T cells and is associated with the inhibition of tumor growth in mice and the decrease of PD-1 expression in tumor-infiltrating CD8
+
T cells. T-bet may be involved in the regulation of PD-1 expression by IL-36γ, but its specific molecular mechanism still needs to be further verified.
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