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重庆医科大学附属儿童医院、儿童发育疾病研究省部共建教育部重点实验室、儿科学重庆市重点实验室、重庆市儿童发育重大疾病诊治与预防国际科技合作基地,重庆,400014
纸质出版日期:2014,
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田明达, 罗 聪, 朱朝敏, 等. 2种超顺磁性Fe3O4纳米粒子的制备及其对大鼠肺部的急性毒性效应[J]. 重庆医科大学学报, 2014,38(9):1215-1220.
Tian Mingda, Luo Cong, Zhu Chaomin, et al. Preparation of two kinds of superparamagnetic iron oxide nanoparticles and their acute toxicity to rat lungs[J]. Journal of Chongqing Medical University, 2014,38(9):1215-1220.
田明达, 罗 聪, 朱朝敏, 等. 2种超顺磁性Fe3O4纳米粒子的制备及其对大鼠肺部的急性毒性效应[J]. 重庆医科大学学报, 2014,38(9):1215-1220. DOI:
Tian Mingda, Luo Cong, Zhu Chaomin, et al. Preparation of two kinds of superparamagnetic iron oxide nanoparticles and their acute toxicity to rat lungs[J]. Journal of Chongqing Medical University, 2014,38(9):1215-1220. DOI:
目的:分别制备壳聚糖和油酸钠修饰的超顺磁性Fe3O4纳米粒子(superparamagnetic iron oxide nanoparticles,SPIONs),并探讨其对大鼠肺部的急性毒性效应。方法:采用化学共沉淀法制备壳聚糖和油酸钠修饰的SPIONs并对其进行表征。将54只SD大鼠随机分为生理盐水对照组(n=18)、壳聚糖SPIONs组(n=18)和油酸钠SPIONs组(n=18)。口腔内气管插管给药,对大鼠的一般情况进行观察,分别于给药后24、72 h和第14天随机处死每组中6只大鼠,腹腔静脉取血检测主要血生化指标,取支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF),计数细胞总数和中性粒细胞的数量,HE染色观察肺部的病理改变。结果:(1)制备的SPIONs均为30 nm左右的类球形结晶。(2)大鼠一般情况好,未发生死亡。(3)2实验组血清中的主要血生化指标仅有24 h总蛋白(total protein,TP)含量和14 d碱性磷酸酶(alkaline phosphatase,ALP)含量2项指标与正常对照组有差异[TP(g/L)24 h组:壳聚糖SPIONs组(n=6):62.40±3.60,油酸钠SPIONs组(n=6):69.95±5.16,正常对照组(n=6):63.22±2.55,F=6.344,P=0.010;ALP(u/L)14 d组:壳聚糖SPIONs组(n=6):78.83±7.92,油酸钠SPIONs组(n=6):106.83±26.95,正常对照组(n=6):99.85±9.63,F=4.336,P=0.033)。(4)实验组BALF中的细胞总数(×104个)在24 h和72 h均高于正常对照组(壳聚糖SPIONs 24 h组(n=6):780.00±130.58,油酸钠SPIONs 24 h组(n=6):1 000.00±166.85,正常对照24 h组(n=6):498.33±114.75,F=19.605,P=0.000;壳聚糖SPIONs 72 h组(n=6):809.17±197.49,油酸钠SPIONs 72 h组(n=6):920.00±125.54,正常对照72 h组(n=6):580.00±123.29,F=7.735,P=0.005),且油酸钠SPIONs组明显高于壳聚糖SPIONs组,在14 d时均下降(壳聚糖SPIONs 14 d组(n=6):628.33±133.29,油酸钠SPIONs 14 d组(n=6):654.17±99.27,正常对照14 d组(n=6):570.83±94.15,F=0.898,P=0.428)。(5)实验组BALF中中性粒细胞的数量(×104个)在24 h和72 h均高于正常对照组(壳聚糖SPIONs 24 h组(n=6):45.00±14.12,油酸钠SPIONs 24 h组(n=6):90.00±24.50,正常对照24 h组(n=6):1.02±0.33,F=44.565,P=0.000;壳聚糖SPIONs 72 h组(n=6):9.15±8.82,油酸钠SPIONs 72 h组(n=6):19.17±5.38,正常对照72 h组(n=6):1.09±0.57,F=13.791,P=0.000),且油酸钠SPIONs组明显高于壳聚糖SPIONs组,在14 d时下降至接近正常。(6)实验组的肺部HE染色可以明显看到肺泡断裂,肺泡壁增厚,炎症细胞浸润,油酸钠SPIONs组炎症表现更严重。壳聚糖SPIONs组肺损伤有自我修复的趋势,而油酸钠SPIONs组减轻不明显。结论:壳聚糖SPIONs与油酸钠SPIONs相比,对肺部毒性作用小,并且随着时间的延长,毒性效应逐渐减轻。
Objective:To prepare superparamagnetic iron oxide nanoparticles(SPIONs) modified by chitosan and sodium oleate and to investigate their acute lung toxicity. Methods:The SPIONs were prepared by coprecipitation and their properties were measured. Fifty-four SD rats were divided into three groups randomly:control group(n=18),chitosan-SPIONs group(n=18) and sodi-um oleate-SPIONs group(n=18). The rats were exposed to SPIONs by intratracheal instillation. General condition of the rats was observed. Six rats of each group were killed randomly at 24 h,72 h and 14 d after the exposure. The major blood biochemical indicators were analyzed with an automatic biochemical analyz-er. Bronchoalveolar lavage fluid(BALF) was taken and the total cells and neutrophil cells were counted. The pathological changes of lungs were observed with HE staining. Results:①Both of the SPIONs exhibited structure of spherical crystallization with a diameter of 30 nm. ②The normal situation of rats was good and no rat died;③Only two blood biochemical indicators including total protein(TP) of 24 h and alkaline phosphatase(ALP) of 14 d were different from those of control group(TP(g/L) 24 h group:chitosan-SPIONs group(n=6):62.40±3.60,sodium oleate-SPIONs group(n=6):69.95±5.16,control group(n=6):63.22±2.55,F=6.344,P=0.010;ALP(u/L) 14 d group:chitosan-SPIONs group(n=6):78.83±7.92,sodium oleate-SPIONs group(n=6):106.83±26.95,control group(n=6):99.85±9.63,F=4.336,P=0.033). ④Total cells(×104) in BALF of experimental groups were higher than those in control group at 24 h and 72 h and total cells of sodium oleate-SPIONs group were obviously higher than those of chitosan-SPIONs group(chitosan-SPIONs 24 h group(n=6):780.00±130.58,sodium oleate-SPIONs 24 h group(n=6):1 000.00±166.85,control 24 h group(n=6):498.33±114.75,F=19.605,P=0.000;chitosan-SPIONs 72 h group(n=6):809.17±197.49,sodium oleate-SPIONs 72 h group(n=6):920.00±125.54,control 72 h group(n=6):580.00±123.29,F=7.735,P=0.005). Both of them were decreased to normal on 14 d(chitosan-SPIONs group(n=6):628.33±133.29,sodium oleate-SPIONs group(n=6):654.17±99.27,control group(n=6):570.83±94.15,F=0.898,P =0.428). ⑤Neutrophil cells(×104) in BALF of experimental groups were higher than those of control group at 24 h and 72 h(chitosan-SPIONs 24 h group(n=6):45.00±14.12,sodium oleate-SPIONs 24 h group(n=6):90.00±24.50,control 24 h group(n=6):1.02±0.33,F=44.565,P=0.000;chitosan-SPIONs 72 h group(n=6):9.15±8.82,sodium oleate-SPIONs 72 h group(n=6):19.17±5.38,control 72 h group(n=6):1.09±0.57,F=13.791,P=0.000). Neutrophil cells in BALF were more in sodium oleate-SPIONs group than in chitosan-SPIONs group.⑥HE staining showed the fracture of pulmonary alveoli,thickening of alveolar walls,and inflammatory cell infiltration in the experimental groups which were more serious in sodium oleate-SPIONs group than in chitosan-SPIONs group. Conclusion:Chitosan modified SPIONs have less toxicity to the rats’ lungs than sodium oleate modified SPIONs and their lung toxicity reduces over time.
超顺磁性Fe3O4纳米粒子壳聚糖油酸钠肺部毒性
superparamagnetic iron oxide nanoparticleschitosansodium oleatelung toxicity
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