1.陆军军医大学大坪医院特殊环境战伤防治研究室, 创伤与化学中毒全国重点实验室,重庆
2.西南交通大学生命科学与工程学院,四川成都
3.陆军军医大学(第三军医大学)基础医学院细胞生物学教研室,重庆
WANG Yun, E-mail: yunwang@tmmu.edu.cn
YAN Jun, E-mail: 13883092250@163.com
Received:03 July 2025,
Revised:2025-10-21,
Accepted:22 October 2025,
Published:15 November 2025
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夏雨,余静,陈代琦,等.曲古抑菌素A通过重塑CD4+T细胞免疫稳态缓解大肠杆菌感染性炎症[J].陆军军医大学学报,2025,47(21):2591-2601.DOI:10.16016/j.2097-0927.202507014.
XIA Y,YU J,CHEN D Q,et al.Trichostatin A attenuates E.coli-induced inflammation by modulating CD4+T cell homeostasis[J].J Army Med Univ,2025,47(21):2591-2601.DOI:10.16016/j.2097-0927.202507014.
夏雨,余静,陈代琦,等.曲古抑菌素A通过重塑CD4+T细胞免疫稳态缓解大肠杆菌感染性炎症[J].陆军军医大学学报,2025,47(21):2591-2601.DOI:10.16016/j.2097-0927.202507014. DOI:
XIA Y,YU J,CHEN D Q,et al.Trichostatin A attenuates E.coli-induced inflammation by modulating CD4+T cell homeostasis[J].J Army Med Univ,2025,47(21):2591-2601.DOI:10.16016/j.2097-0927.202507014. DOI:
目的
2
探讨曲古抑菌素A(trichostatin A, TSA)调控CD4
+
T细胞亚群在大肠杆菌(
Escherichia coli
,
E.coli
)感染性炎症中的作用。
方法
2
采用完全随机设计,将8周龄、雄性小鼠(体质量22~25 g)分为(
n
=16):对照组(DMSO组)、感染组(DMSO
+E.coli
组)及干预组(
E.coli
+TSA组),其中
E.coli
+TSA组根据TSA不同浓度分为2.5、5.0、10.0 mg/kg 3个亚组。腹腔注射3×10⁸ CFU/mL
E.coli
,构建感染模型,并在TSA干预不同时间点(12、24、48、96 h)取材。通过生存率观察、体质量监测、小肠组织病理染色、ELISA、转录组测序、流式细胞术以及RT-qPCR等手段,评估TSA对
E.coli
感染性炎症的疗效及与CD4
+
T细胞亚群的关系。
结果
2
与DMSO
+E.coli
组相比,5.0 mg/kg TSA可显著提高感染小鼠的生存率,抑制体质量下降,改善小肠病理损伤,降低感染24 h小鼠血清中肿瘤坏死因子-α水平(
P
<
0.000 1),提升白细胞介素-10水平(
P
<
0.05)。转录组结果表明5.0 mg/kg TSA干预24 h后可以影响调控FoxO、Th17、Th1/2等T细胞分化的信号通路,同时流式细胞术和RT-qPCR结果显示相较于DMSO
+E.coli
组,5.0 mg/kg TSA能下调感染96 h后小鼠Th17细胞标志分子RORγt表达,同时明显上调Treg细胞标志分子Foxp3表达(
P
<
0.05)。
结论
2
TSA可能是通过调控CD4
+
T细胞朝向Treg亚群分化同时抑制其向Th17亚群分化,从而抑制促炎因子释放来缓解细菌感染性炎症疾病。
Objective
2
To investigate the role of trichostatin A (TSA) in regulating CD4
+
T cell subpopulations during
Escherichia coli (E.coli)
inflammatory infections.
Methods
2
Male mice (8 weeks old
weighing 22~25 g) were randomly divided into 3 groups (
n
=16): a dimethyl sulfoxide (DMSO) control group
an infection group (DMSO
+E.coli
)
and an intervention group (
E.coli
+TSA).
E.coli
was administered
via
intraperitoneal injection at a concentration of 3×10⁸ CFU/mL to establish an infection model. The
E.coli
+TSA group was further subdivided in
to 3 subgroups based on different TSA concentrations (2.5
5.0
10.0 mg/kg). Then the samples were collected at different time points (12
24
48
96 h) after TSA intervention. The efficacy of TSA in treating
E.coli
-induced inflammatory responses and its relationship with CD4
+
T cell subsets were evaluated by survival rate observation
body weight monitoring
histopathological staining for small intestine
ELISA detection
transcriptomics sequencing
flow cytometry and RT-qPCR analysis.
Results
2
Compared with the
E.coli
group
5 mg/kg TSA significantly increased survival rate
suppressed body weight loss
improved pathological damage in the small intestinal
reduced serum TNF-α level in 24 h after infection (
P
<
0.000 1)
and elevated IL-10 level (
P
<
0.05). Transcriptomic analysis revealed that 5 mg/kg TSA intervention for 24 h modulated the T cell differentiation signaling pathways
including those regulating FoxO
Th17
and Th1/2. Flow cytometry and RT-qPCR results showed that compared to the
E.coli
group
5 mg/kg TSA down-regulated the expression of the Th17 cell marker RORγt in mice 96 h after infection while significantly up-regulated the expression of the Treg cell marker Foxp3 (
P
<
0.05).
Conclusion
2
TSA may alleviate bacterial infectious inflammatory diseases by regulating the differentiation of CD4
+
T cells toward the Treg subset while simultaneously inhibiting their differentiation toward the Th17 subset
thereby suppressing the release of proinflammatory cytokines.
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