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1.湖南中医药大学,长沙 410007
2.湖南中医药大学 第一附属医院,长沙 410007
3.江西中医药大学 附属医院,南昌 330000
Received:25 November 2021,
Published Online:22 March 2022,
Published:05 August 2022
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周瑶,刘丽芳,柳佳璐等.柴胡清肝汤干预NLRP3/IL-1β通路治疗肉芽肿性小叶性乳腺炎模型大鼠的作用机制[J].中国实验方剂学杂志,2022,28(15):1-7.
ZHOU Yao,LIU Lifang,LIU Jialu,et al.Mechanism of Chaihu Qinggantang in Intervening NLRP3/IL-1β Pathway to Treat Granulomatous Lobular Mastitis in Rat Model[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(15):1-7.
周瑶,刘丽芳,柳佳璐等.柴胡清肝汤干预NLRP3/IL-1β通路治疗肉芽肿性小叶性乳腺炎模型大鼠的作用机制[J].中国实验方剂学杂志,2022,28(15):1-7. DOI: 10.13422/j.cnki.syfjx.20221005.
ZHOU Yao,LIU Lifang,LIU Jialu,et al.Mechanism of Chaihu Qinggantang in Intervening NLRP3/IL-1β Pathway to Treat Granulomatous Lobular Mastitis in Rat Model[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(15):1-7. DOI: 10.13422/j.cnki.syfjx.20221005.
目的
2
探讨柴胡清肝汤(CHQGT)治疗肉芽肿性小叶性乳腺炎(GLM)模型大鼠的作用机制。
方法
2
将60只雌性大鼠分为正常组、模型组、醋酸泼尼松龙组(0.001 8 g·kg
-1
)、柴胡清肝汤低、中、高剂量组(4.5、8.9、17.8 g·kg
-1
),采用GLM病变组织与弗氏佐剂混合后的组织匀浆进行造模,造模成功后药物干预组均给予相应的处理因素,正常组、模型组给予等量生理盐水。14 d后肉眼观察小鼠乳腺变化;苏木素-伊红(HE)染色观察取材的乳腺组织病理学改变;实时荧光定量聚合酶链式反应(Real-time PCR)检测NOD样受体蛋白3(NLRP3)炎症小体、胱天蛋白酶-1(Caspase-1)、白细胞介素-1
β
(IL-1
β
) mRNA表达;蛋白免疫印迹法(Western bolt)检测NLRP3、Caspase-1、IL-1
β
、白细胞介素-18(IL-18)的蛋白表达情况。
结果
2
与正常组比较,模型组大鼠肉眼可见乳房明显红肿,且乳腺炎症指数显著升高(
P
<
0.01),病理学改变包括形成以乳腺小叶为中心的肉芽肿,伴见大量淋巴细胞、浆细胞等炎性细胞浸润,模型组大鼠乳腺组织中的NLRP3、Caspase-1及IL-1
β
mRNA相对表达量显著增加(
P
<
0.01),NLRP3、Caspase1、IL-1
β
和IL-18蛋白的表达显著增加(
P
<
0.01);与模型组比较,各治疗组大鼠乳房红肿均有改善,柴胡清肝汤中、高剂量组及泼尼松龙组经治后炎症指数均有不同程度下降(
P
<
0.05,
P
<
0.01),乳腺的炎症程度明显改善,病理学方面巨噬细胞、淋巴细胞、浆细胞等炎性细胞均有不同程度减少,柴胡清肝汤高剂量组、泼尼松龙组均能够明显下调NLRP3、Caspase-1及IL-1
β
mRNA的表达(
P
<
0.05,
P
<
0.01),降低NLRP3、Caspase-1、IL-1
β
和IL-18蛋白的表达(
P
<
0.05,
P
<
0.01)。
结论
2
柴胡清肝汤能够抑制炎症,治疗大鼠GLM,其可能机制与抑制NLRP3/IL-1
β
信号通路有关,这为“清消法”防治GLM提供了新的靶点。
Objective
2
To investigate the mechanism of Chaihu Qinggantang (CHQGT) in the treatment of granulomatous lobular mastitis (GLM) in the rat model.
Method
2
Sixty female rats were divided into a normal group, a model group, a prednisolone group (0.001 8 g·kg
-1
), and three CHQGT low-dose, medium-dose, and high-dose groups (4.5, 8.9, 17.8 g·kg
-1
). The tissue homogenates mixed with GLM lesion tissue and Fritner's reagent were used for modeling. After modeling, the treatment groups were given corresponding treatment factors, and the normal group and the model group were given the equal volume of normal saline. The changes in mammary gland of rats were observed after 14 d. Hematoxylin-eosin (HE) staining was used to observe the histopathological changes in breast samples. The mRNA expressions of NOD-like receptor thermal protein domain associated protein 3 (NLRP3) inflammasome, Caspase-1, and interleukin-1
β
(IL-1
β
) were detected by real-time quantitative fluorescence polymerase chain reaction (Real-time PCR). The protein expressions of NLRP3, Caspase-1, IL-1
β
, and IL-18 were detected by Western bolt.
Result
2
As compared with the normal group, the breasts of rats in the model group were obviously swelling, and mammary gland inflammation index was significantly increased (
P
<
0.01). Pathological changes included the formation of granuloma centered on the lobule of mammary gland with a large number of inflammatory cells such as lymphocytes and plasma cells. The mRNA expressions of NLRP3, Caspase-1, and IL-1
β
, and the protein expressions of NLRP3, Caspase-1, IL-1
β
, and IL18 in the model group were significantly increased (
P
<
0.01). Compared with the model group, the treatment groups improved breast swelling, and the CHQGT medium and high-dose groups and the prednisolone group reduced inflammation index to some extent after treatment (
P
<
0.05,
P
<
0.01). The inflammation degree of mammary gland was significantly improved, and inflammatory cells such as macrophages, lymphocytes, and plasma cells were reduced to varying degrees in pathological aspects. The mRNA expressions of NLRP3, Caspase-1, and IL-1
β
, and the protein expressions of NLRP3, Caspase-1, IL-1
β
, and IL-18 in the CHQGT high-dose group and the prednisolone group were significantly down-regulated (
P
<
0.05,
P
<
0.01).
Conclusion
2
CHQGT inhibits inflammation and treats GLM in rats. The mechanism is possibly related to the inhibition of NLRP3/IL-1
β
signaling pathway, which provides a new target for the prevention and treatment of GLM by Qingxiao method.
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