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1.北京大学 深圳医院,广东 深圳 518036
2.深圳市炎症与免疫性疾病重点实验室,广东 深圳 518036
栾慧杰,在读硕士,从事风湿免疫疾病临床与基础研究,E-mail:649695479@qq.com
王庆文,教授,主任医师,博士生导师,从事风湿免疫病临床工作,E-mail:wqw_sw@163.com
收稿日期:2021-10-18,
网络出版日期:2021-12-16,
纸质出版日期:2022-02-20
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栾慧杰,何莲花,何娟等.积雪草苷对DBA/1小鼠胶原诱导型关节炎中Th17/Treg细胞表达的影响[J].中国实验方剂学杂志,2022,28(04):76-83.
LUAN Hui-jie,HE Lian-hua,HE Juan,et al.Effect of Asiaticoside on Expression of Th17/Treg Cells in DBA/1 Mice with Collagen-Induced Arthritis[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(04):76-83.
栾慧杰,何莲花,何娟等.积雪草苷对DBA/1小鼠胶原诱导型关节炎中Th17/Treg细胞表达的影响[J].中国实验方剂学杂志,2022,28(04):76-83. DOI: 10.13422/j.cnki.syfjx.20220437.
LUAN Hui-jie,HE Lian-hua,HE Juan,et al.Effect of Asiaticoside on Expression of Th17/Treg Cells in DBA/1 Mice with Collagen-Induced Arthritis[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(04):76-83. DOI: 10.13422/j.cnki.syfjx.20220437.
目的
2
观察积雪草苷对DBA/1小鼠胶原诱导型关节炎(CIA)中辅助性T细胞17(Th17)和调节性T细胞(Treg)表达的影响。
方法
2
将SPF级DBA/1雄性小鼠按体质量随机分为6组:正常组,CIA组,甲氨蝶呤组(MTX组,0.5 mg·kg
-1
),积雪草苷低、中、高剂量(5,15,45 mg·kg
-1
)组。除正常组外,其余组小鼠均构建CIA模型,分别于第1天给予牛Ⅱ型胶原和完全弗氏佐剂进行一次免疫,第21天给予牛Ⅱ型胶原和不完全弗氏佐剂进行二次免疫,并在二次免疫当天开始给药,MTX腹腔注射方式给药,积雪草苷灌胃方式给药,每天1次,共给药28 d。第49天小鼠取材后,小鼠关节组织进行苏木素-伊红(HE)染色观察病理改变;免疫组化检测Th17细胞标志物IL-17和Treg细胞标志物叉头样转录因子3(FoxP3)的表达情况;免疫荧光双染法检测小鼠关节组织CD4
+
T细胞中IL-17和FoxP3的表达情况;流式细胞术检测小鼠淋巴结中Th17和Treg细胞比例。
结果
2
与正常组比较,CIA组小鼠关节结构严重紊乱,关节软骨及骨破坏明显,骨侵蚀严重(
P
<
0.01);小鼠关节组织CD4及IL-17阳性染色明显增多,且积分吸光度
IA
值显著升高(
P
<
0.01),FoxP3阳性染色减少且
IA
值显著降低(
P
<
0.01),Th17/Treg值显著升高(
P
<
0.01);小鼠淋巴结中Th17细胞表达比例明显增高(
P
<
0.01),Treg细胞的表达比例显著减少(
P
<
0.01);与CIA组比较,MTX组和积雪草苷各剂量组小鼠关节结构均相对正常,骨侵蚀、骨破坏较轻,关节面相对完整光滑;MTX组和积雪草苷中、高剂量组小鼠关节组织中CD4阳性染色减少且
IA
值明显降低(
P
<
0.05);MTX组和积雪草苷各剂量组IL-17阳性染色明显减少且
IA
值明显降低(
P
<
0.05,
P
<
0.01);积雪草苷中、高剂量组FoxP3阳性表达明显增加且
IA
值明显升高(
P
<
0.05,
P
<
0.01);MTX组和积雪草苷中、高剂量组Th17/Treg值明显降低(
P
<
0.05,
P
<
0.01);小鼠淋巴结组织中,积雪草苷各剂量组Th17细胞表达比例明显降低(
P
<
0.05,
P
<
0.01),Treg细胞的表达比例明显增加(
P
<
0.05,
P
<
0.01)。
结论
2
积雪草苷可抑制CIA小鼠Th17细胞的表达,促进Treg细胞的表达,从而调节Th17/Treg平衡。
Objective
2
To observe the effect of asiaticoside (AC) on the expression of T helper 17 (Th17) cells and regulatory T (Treg) cells in DBA/1 mice with collagen-induced arthritis (CIA).
Method
2
Male SPF DBA/1 mice were randomized into six groups according to body weight: control group, CIA group, methotrexate group (MTX group,
ip
, 0.5 mg·kg
-1
), and AC low-, medium-, and high-dose groups (
ig
, 5, 15, 45 mg·kg
-1
, respectively). Modeling was performed in rats other than the control group. To be specific, they were immunized with bovine type Ⅱ collagen and complete Freund's adjuvant on the first day and with bovine type Ⅱ collagen and incomplete Freund's adjuvant on the 21
st
day. Administration began on the day of the second immunization, once a day for 28 days. On the 49
th
day, related tissues were collected. Then, hematoxylin-eosin (HE) staining was performed to observe the pathological changes of the joints. Immunohistochemical method was used to detect the expression of interleukin-17 (IL-17) and forkhead box protein-3 (FoxP3), the markers of Th17 and Treg cells, respectively, immunofluorescence double staining the expression of IL-17 and FoxP3 in CD4
+
T cells of mouse joint tissue, and flow cytometry the proportions of Th17 and Treg cells in mouse lymph nodes.
Result
2
Compared with the control group, CIA group demonstrated joint disorder, damage of articular cartilage and bone, severe bone erosion (
P
<
0.01), increase in stained CD4 and IL-17 and the integral absorbance (
IA
) (
P
<
0.01), decrease in stained FoxP3 and the
IA
(
P
<
0.01), rise of Th17/Treg ratio (
P
<
0.01), elevation of Th17 expression in mouse lymph nodes (
P
<
0.01), and reduction in Treg expression (
P
<
0.01). Compared with CIA group, MTX group and three AC groups showed normal joints, alleviated bone erosion and damage, intact and smooth joint surface, and decrease in stained IL-17 and
IA
(
P
<
0.05,
P
<
0.01), and MTX group and AC medium-dose and high-dose groups registered decrease in stained CD4 and
IA
(
P
<
0.01) and reduction in Th17/Treg ratio (
P
<
0.05,
P
<
0.01). Moreover, AC medium-dose and high-dose groups showed rise in stained FoxP3 and
IA
(
P
<
0.05,
P
<
0.01). In the lymph nodes of mice, decrease in expression of Th17 cells (
P
<
0.05,
P
<
0.01) and the increase in expression of Treg cells (
P
<
0.05,
P
<
0.01) were observed in all the three AC group.
Conclusion
2
AC can regulate Th17/Treg balance by inhibiting the expression of Th17 cells and promoting the expression of Treg cells in CIA mice.
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