机构地区:[1]中山大学公共卫生学院营养学系,广州510080
出 处:《中华预防医学杂志》2011年第7期645-649,共5页Chinese Journal of Preventive Medicine
基 金:广东省医学科学基金(A1999015)
摘 要:目的研究早期补充不同剂量的1,25二羟基维生素D3[1,25-(OH)2VitD3]对幼年哮喘大鼠气道炎症的作用和对炎症因子的影响。方法将刚断乳的40只大鼠按随机数字表分为5组:正常组、哮喘组,1,25-(OH)2VitD3低、中和高剂量组,每组8只。低、中和高剂量组每2天腹腔注射1次1,25(OH):VitD3,直至第25天,低、中和高剂量组注释剂量分别为1、4、10μ/kg。除正常组外,其他4组大鼠用卵清蛋白激发哮喘模型,干预完成后股动脉取血收集血清,收集支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)进行细胞计数和分类;ELISA测定血清和BALF中自介素-4(IL-4),白介素-5(IL-5)和γ干扰素(IFN-γ)水平;观察肺组织炎症改变。结果正常组、哮喘组及低、中、高剂量组大鼠BALF中白细胞总数分别为(5.98±1.67)×10^5/ml、(25.34±4.28)×10^5/ml、(17.24±3.3)×10^5/ml、(9.31±3.37)×10^5/ml、(45.1±15.75)×10^5/ml(F=33.453,P〈0.01);BALF中嗜酸粒细胞百分比分别为(1.44±0.78)%、(17.81±6.88)%、(15.00±5.70)%、(8.89±3.66)%、(25.88±5.57)%(F=27.299,P〈0.01);血清中IL4含量分别为(0.62±0.54)、(7.57±1.04)、(3.58±0.56)、(2.70±0.78)、(5.27±0.30)pg/ml(F=116.287,P〈0.01);血清中IL-5含量分别为(32.20±4.23)、(67.14±18.14)、(37.51±0.47)、(40.69±2.47)、(124.60±36.19)pg/ml(F=23.902,P〈0.01);血清中IFN-γ含量分别为(79.71±10.08)、(49.06±4.46)、(59.15±2.51)、(59.27±2.33)、(53.85±1.97)pg/ml(F=39.954,P〈0.01);BALF中IL4含量分别为(0.51±0.30)、(102.92±54.61)、(8.64±4.07)、(3.10±1.28)、(33.67±8.10)pg/ml(F=24.062,P〈0.01);BALF中IObjective To explore the effect of different doses of 1,25-( OH)2VitD3 early supplementation on airway inflammation and lung inflammatory factors in baby rats with asthma. Methods Forty male weaned Wistar rats were divided into normal group, model group, low 1,25-(OH)2VitD3 group, middle 1,25-(OH) 2VitD3 group, high 1, 25-(OH) 2VitD3 group using random number table (8 rats each group). The rats in low,middle and high 1,25-(OH)2VitD3 groups were given 1,4,10 μg/kg of 1,25-(OH) 2VitD3 every other day by intraperitoneal injection respectively for 25 days. Except normal group, the rats in other groups were challenged with ovalbumin to establish the asthma model. The pathologic changes of lung tissue, the total white blood cell and classified cell counts in bronchoalveolar lavage fluid (BALF) were measured. The concentrations of IL-4, IL-5 and IFN-γ in serum and BALF were measured by ELISA method. Results The level of total white blood cell counts in BALF were (5.98±1.67) ×10^5/ml,(25.34±4.28) ×10^5/ml,(17.24±3.3) ×10^5/ml,(9.31 ±3.37) ×10^5/ml, (45.1 ± 15.75 ) × 10^5/ml, respectively ( F = 33.453, P 〈 0. 01 ). The percent ratio of EOS in B ALF were (1.44 ±0.78)%, (17.81 ±6. 88)%, (15.00 ±5.70)%, (8.89 ±3.66)%, (25.88±5.57)%, respectively( F = 27. 299,P 〈 0. 01 ). The level of IL-4 in serum of normal, model, low, middle and high-1 , 25-(OH)2VitD3 groups were (0.62± 0.54), (7.57 ± 1.04 ), (3.58 ± 0.56), (2.70 ±0.78) and (5.27±0.30) pg/ml, respectively ( F= 116. 287,P〈 0.01);IL-5 in resum were (32.20 ± 4.23), (67.14± 18. 14), ( 37.51 ± 0.47 ), ( 40. 69 ± 2.47 ) and ( 124. 60 ± 36. 19 ) pg/ml, repectively ( F = 23. 902, P 〈 0. 01 ) ; IFN-γ in serum were ( 79. 71 ± 10. 08 ), ( 49. 06± 4.46 ), ( 59. 15± 2. 51 ), ( 59. 27 ± 2. 33 ) and ( 53.85 ± 1.97 ) pg/ml, respectively ( F = 39. 954, P 〈 0. 01 ). Also in BLAF, the IL-4 of all
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