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400038 重庆,陆军军医大学(第三军医大学)药学与检验医学系微生物与生化药学教研室,国家免疫生物制品工程技术研究中心
[孙红武,E-mail:sunhongwu2001@163.comSUN Hongwu, E-mail: sunhongwu2001@163.com
收稿:2024-01-10,
修回:2024-02-26,
纸质出版:2024-05-15
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叶演, 张泽珑, 朱宝行, 等. WT1多肽乳佐剂疫苗的免疫增强效应及其对急性髓系白血病抗肿瘤效应研究[J]. 陆军军医大学学报, 2024,46(9):1024-1033.
Yan YE, Zelong ZHANG, Baohang ZHU, et al. Improved immune response and anti-tumor effect of WT1 peptide emulsion adjuvant vaccine for acute myeloid leukemia[J]. Journal of Army Medical University, 2024, 46(9): 1024-1033.
叶演, 张泽珑, 朱宝行, 等. WT1多肽乳佐剂疫苗的免疫增强效应及其对急性髓系白血病抗肿瘤效应研究[J]. 陆军军医大学学报, 2024,46(9):1024-1033. DOI: 10.16016/j.2097-0927.202401037.
Yan YE, Zelong ZHANG, Baohang ZHU, et al. Improved immune response and anti-tumor effect of WT1 peptide emulsion adjuvant vaccine for acute myeloid leukemia[J]. Journal of Army Medical University, 2024, 46(9): 1024-1033. DOI: 10.16016/j.2097-0927.202401037.
目的
2
评价Wilm瘤基因1(Wilms’ tumor gene1
WT1)多肽联合AddaVax
TM
乳佐剂疫苗的稳定性、安全性、免疫增强效应及其对急性髓系白血病抗肿瘤效应。
方法
2
用MALDI-TOF-MS飞行时间质谱评价该佐剂疫苗中WT1多肽的稳定性;将C57BL/6雌性小鼠按照随机数字表法分成3组:PBS组、WT1组和WT1+AddaVax
TM
组,使用免疫剂量为抗原50 μg/只、佐剂50 μg/只,按照第0、14、28天肌肉注射免疫程序进行免疫。用HE染色评价疫苗肌肉注射小鼠脏器组织毒性;用ELISA检测细胞因子水平;ELISpot检测脾细胞分泌IFN-γ细胞数量;流式细胞术检测疫苗促体外骨髓来源树突状细胞(bone marrow-derived dendritic cells,BMDCs)成熟和促淋巴细胞活化及H-2Db WT1四聚体检测特异性CD8
+
T细胞比例;用C1498-mWT1稳转细胞株构建小鼠白血病肿瘤模型后,评价其预防与治疗的抗肿瘤效应。
结果
2
WT1多肽可在疫苗中稳定存在,对小鼠肌肉注射未发生明显的脏器组织变化;对小鼠肌肉注射WT1+AddaVax
TM
疫苗后,与WT1组相比,WT1+AddaVax
TM
组可诱导高水平的Th1细胞免疫应答γ干扰素(IFN-γ)、肿瘤坏死因子-α(TNF-α)及其Th17免疫应答白介素17A(IL-17A)(
P
<
0.05);与WT1组相比,WT1+AddaVax
TM
组促进脾淋巴细胞分泌IFN-γ的细胞数量增加(
P
<
0.01),促进BMDCs成熟的标志物CD40
+
/CD11c
+
、CD86
+
CD80
+
/CD11c
+
细胞比例增加(
P
<
0.05),促进淋巴细胞中CD4
+
/CD3
+
T、CD69
+
/CD8
+
T细胞比例增加(
P
<
0.05)及其特异性CD8
+
T细胞比例增加(
P
<
0.05);利用C1498-mWT1小鼠急性髓系白血病皮下荷瘤模型的抗肿瘤效应中,WT1+AddaVax
TM
组中位生存期相比于WT1组小鼠延长了6 d。在第50天时,WT1多肽+AddaVax
TM
组小鼠生存率为28.5%,其他组小鼠全部死亡(
P
<
0.05)。
结论
2
WT1多肽联合AddaVax
TM
乳佐剂疫苗具有良好的免疫学和明显抗肿瘤效果。
Objective
2
To evaluate the stability
safety and immune enhancement and anti-tumor effects of Wilms' tumor gene 1 (WT1) peptide combined with AddaVax
TM
emulsion vaccine for acute myeloid leukemia.
Methods
2
The stability of WT1 peptide in the adjuvant vaccine was evaluated using MALDI-TOF-MS time-o
f-flight mass spectrometry. Female C57BL/6 mice were randomly divided into PBS group
WT1 peptide group
and WT1 peptide+AddaVax
TM
emulsion adjuvant vaccine group. The immunization was performed at a dose of 50 μg/mouse for antigen and 50 μg/mouse for adjuvant
with intramuscular injection on days 0
14
and 28. HE staining was used to assess the toxicity of intramuscular vaccination on mouse organ tissues. Cytokine levels were detected by ELISA
and the number of IFN-γ-secreting splenocytes was measured by ELISpot. Flow cytometry was employed to detect the maturation of bone marrow-derived dendritic cells (BMDCs) promoted by the vaccine
in vitro
and the promotion for lymphocyte activation
and H-2Db WT1 tetramer was utilized to detect the proportion of specific CD8
+
T cells. After establishing a mouse leukemia tumor model using the C1498-mWT1 stable cell line
the anti-tumor effects of the vaccine for prevention and treatment were evaluated.
Results
2
The WT1 peptide stably existed in the vaccine without causing significant organ tissue changes in mice after intramuscular injection. Compared to the mice immunized with WT1 aqueous solution
the mice after intramuscular injection of the WT1 peptide emulsion adjuvant vaccine showed stronger immune responses of Th1 cells
including IFN-γ and TNF-α
as well as Th17 cells of IL-17A (
P
<
0.05)
and the mice had not only promoted number of IFN-γ secreting splenocytes (
P
<
0.01) but also enhanced maturation of BMDCs
as indicated by an increase in the proportions of CD40
+
/CD11c
+
and CD86
+
CD80
+
/CD11c
+
cells (
P
<
0.05). Additionally
there were increases in both the proportion of CD4
+
/CD3
+
T and CD69
+
/CD8
+
T cells (
P
<
0.05) and the proportion of specific CD8
+
T cells (
P
<
0.05). In the anti-tumor effect study
using the C1498-mWT1 mouse model
the median survival time of the WT1+AddaVax
TM
group was extended by 6 d compared to the WT1 aqueous solution group. At day 50
the survival rate of mice in the WT1+AddaVax
TM
group was still 28.5%
while all mice in the other groups had died (
P
<
0.05).
Conclusion
2
The vaccine with the WT1 peptide and AddaVax
TM
emulsion adjuvant exhibits good immunological and anti-tumor effects.
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