中国寄生虫学与寄生虫病杂志 ›› 2009, Vol. 27 ›› Issue (2): 11-147.

• 实验研究 • 上一篇    下一篇

黄芩苷对卡氏肺孢子虫肺炎大鼠TNF-α和sICAM-1的调节作用

周泠1,周必英2 *   

  1. 1 遵义医学院附属医院中医科, 遵义 563003; 2 遵义医学院寄生虫学教研室, 遵义 563003
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-04-30 发布日期:2009-04-30

Influence of Baicalin on TNF-α and Soluble Intercellular Adhesion Molecule-1 in Rats Infected with Pneumocystis carinii

ZHOU Ling 1,ZHOU Bi-ying2 *   

  1. 1 Department of Traditional Chinese Medicine, Affiliated Hospital of Zunyi Medical College,Zunyi 563003,China;2 Department of Parasitology,Zunyi Medical College,Zunyi 563003,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-04-30 Published:2009-04-30

摘要:

目的 研究黄芩苷对卡氏肺孢子虫肺炎(PCP)大鼠血清肿瘤坏死因子α(TNF-α)和可溶性细胞黏附分子1(sICAM-1)的调节作用。 方法 49只SD大鼠随机均分7组,分别为正常对照组(A组)、免疫抑制对照组(B组)、有效药物对照组(C组)、黄芩苷预防组(D组)、黄芩苷低(E组)、中(F组)和高剂量治疗组(G组)。A组不做任何处理,其他各组均于腹股沟皮下注射地塞米松磷酸钠(每次3.5 mg/只,每周2次,连续注射6周),诱导其免疫抑制建立大鼠卡氏肺孢子虫感染动物模型。D组注射地塞米松磷酸钠3周后,灌胃黄芩苷100 mg/(kg?d)连续5周。C、E、F和G组于连续注射地塞米松磷酸钠6周后给药,其中C组灌胃磺胺甲基异恶唑(SMZ)250 mg/(kg?d)和甲氧苄胺嘧啶(TMP) 50 mg/(kg?d),连续2周; E、F和G组分别灌胃黄芩苷100、200和400 mg/(kg?d),均连续2周。B组不给药。各组大鼠均于第8周末摘眼球取血、分离血清,用放射免疫分析法检测TNF-α含量,ELISA法检测sICAM-1含量。同时剖杀大鼠取肺组织制作印片(六胺银染色)和病理切片(HE染色),观察其病理学变化。 结果 大鼠血清TNF-α含量,黄芩苷预防组[(2.14±0.14) ng/ml]及低[(2.57±0.15) ng/ml]、 中[(1.46±0.14) ng/ml]和高[(1.12±0.13) ng/ml]剂量治疗组均高于正常对照组[(0.70±0.21) ng/ml](P<0.05), 低于免疫抑制对照组[(3.65±0.73) ng/ml](P<0.01)。有效药物对照组[(1.59±0.14) ng/ml]明显高于正常对照组(P<0.01), 低于免疫抑制对照组(P<0.01)。血清sICAM-1含量, 黄芩苷预防组[(618.68±52.42) pg/ml]及低[(814.29±61.11) pg/ml]、 中[(498.08±32.56) pg/ml]、 高[(377.06±56.56) pg/ml]剂量治疗组均低于免疫抑制对照组[(1 247.39±288.57) pg/ml](P<0.05),有效药物对照组[(386.95±44.98) pg/ml]低于免疫抑制对照组(P<0.01)。黄芩苷各治疗组肺组织炎症较免疫抑制对照组明显减轻,肺间质炎性细胞浸润及肺泡腔泡沫样渗出物均明显减少。 结论 黄芩苷能降低PCP大鼠血清TNF-α和sICAM-1含量,减轻肺部炎性反应。

关键词: 黄芩苷, 卡氏肺孢子虫, TNF-α, sICAM-1

Abstract: Objective To explore the effect of baicalin on tumour necrosis factor-α (TNF-α) and soluble inter-cellular adhesion molecule-1 (sICAM-1) of immunosuppressed rats infected with Pneumocystis carinii. Methods Forty-nine SD rats were randomly divided into 7 groups: normal control (A), immunosuppressed control (B), SMZ/TMP control (C), baicalin prevention (D), low dose (E), moderate dose (F) and high dose (G). Rats of group D received six injections at three-day intervals with 3.5 mg dexamethasone sodium phosphate for 3 weeks, while groups B, C, E, F and G received same immunosuppressor but for 6 weeks. Rats in group D were given 100 mg/kg baicalin daily for 5 weeks, and groups C, E, F and G were given 250 mg/kg SMZ+50 mg/kg TMP, low dose [100 mg/(kg?d)], moderate dose [200 mg/(kg?d)], and high dose [400 mg/(kg?d)] baicalin daily for 2 weeks, respectively. At the end of 8th week after immunosppression, the contents of TNF-α and sICAM-1 in peripheral blood were detected by radioimmunoassay(RIA) and ELISA, respectively. The pathological change of lung was observed by lung imprint smear with gormori methenamine silver (GMS) staining and lung section with hematoxylin-eosin (HE) staining. Results The content of TNF-α in group D[(2.14±0.14) ng/ml], group E [(2.57±0.15) ng/ml], group F [(1.46±0.14) ng/ml], group G [(1.12±0.13) ng/ml] andgroup C [(1.59±0.14) ng/ml] were higher than that of group A [(0.70±0.21)ng/ml](P<0.05, P<0.01), and lower than group B [(3.65±0.73) ng/ml](P<0.01). The content of sICAM-1 in group D [(618.68±52.42) pg/ml], group E [(814.29±61.11) pg/ml], group F [(498.08±32.56) pg/ml], group G [(377.06±56.56) pg/ml] and group C [(386.95±44.98) pg/ml] were lower than group B [(1 247.39±288.57) pg/ml](P<0.05). Compared with immunosuppressed control group, there were less alveolar interstitial lymphocytes, foamy intra-alveolar exudate and inflammation of lung tissue in rats of drug treatment groups. Conclusion Baicalin can decrease the contents of TNF-α and sICAM-1, and alleviate inflammation in lung tissues of rats infected with Pneumocystis carinii.

Key words: Baicalin, Pneumocystis carinii, TNF-α, Soluble intercellular adhesion molecule-1