摘要
目的探讨纳米-氧化钛灌胃染毒对胃溃疡大鼠血象的影响。,方法对纳米二氧化钛材料进行表征。将24只8周龄清沽级雄性SD大鼠按体重川随机数字表法分为4组(每组6只)。、在胃体部与幽门窦交界处注射体积分数为20%的醋酸,建立胃溃疡模型后,每天1次灌胃,分别给予0(对照组)、10(低剂量组)、50(中剂量组)、200mg/kg(高剂量组)纳米二氧化钛,染毒30d后进行血液常规指标和凝血指标的检测,并分析其变化情况。结果纳米二氧化钛为锐钛矿品型,近球形,平均粒径(75±15)nnl。高剂量纳米二氧化钛染毒组大鼠的自细胞(WBC)汁数[(8.48±3.28)×10^9/L]、淋巴细胞(I,YM)计数[(6.85±2.53)×10^9/L]、单核细胞(MOD)汁数[(0.27±0.12)×10^9/L]、中性粒细胞(GRN)计数[(1.37±0.86)×10。/L]、红细胞(RBC)计数[(8.20±0.49)×10^9/L]、红细胞乐积(HCT)[(45.34±1.4)%]均高于对照组[分别为(2.63±0.34)×10^9/L]、(2.25±0.26)×1×10^9/L、(0.054±0.06)×10^9/L、(0.334±0.26)×10^9/L、(4.874±2.37)×10^9/L、(27.2±13.3)%],差异有统计学意义(t值分别为-3.449、-3.825、-3.554、-3.097、-2.972、-2.936,P值均〈0.05);中剂量组l夫鼠的WBC[(6.88±3.06)×10^9/L]、MOD[(0.20±0.07)×10^9/L]、RBC[(7.79-I-0.48)×10^9/L]、HCT[(42.7±2.8)%]亦明显高于对照组,差异有统计‘学意义(t值分别为-2.507、-2.367、-2.605、~2.5l],P值均〈0.05)。各染毒组大鼠与埘照组相比,其他血常规和凝血相关检测指标未虬明显改变..结论较长期绛口摄入纳米二氧化钛,可导致胃溃疡大鼠WBC和RBC计数指标的明显升高,但对血小板和凝m相父指标无明显影响。
Objective To explore the eftect of titanium dioxide (TiO2) nanopartieles on hemogram in rats with gastric ulcer. Methods Physieoehemical properties of TiO2 nanopartieles were characterized. Twenty-fimr clear class SD male rats, aging 8 week-old, were randomly divided into 4 groups, 6 rats for each group. 20% acetic acid were injected into the rats' stomach on the border of gastric body and pyloric antrum, and hereby established the gastric ulcer model. The rats in 4 groups were exposed to TiO2 nanoparticles through intragastrie administration at 0, 10, 50 and 200 mg/kg body weight respectively tor 30 days. Af)erwards, the rats were conducted blood routine test and blood coagulation test [br analysis. Results TiO2 nanoparticles were anatase crystals, closely spherical shape, whose average grain diameter was (75+_15) nm. The levels of white blood cell (WBC) count ((8.48±3.28)×10^9/L), lymphocyte (LYM) ( (6. 85±2.53) ~ 109/L), moncyte (MOD) ( (0. 27±0. 12) ×10^9/L), granulocyte (GRN) ((1.37±0.86)×10^9/L), red blood cell (RBC) ((8.20±0.49)×10^9/L) and hematoerit (HCT) ( (45.3 + I. 4)% ) in the 200 mg/kg dose group were significantly higher than those in the control group ((2.63±0.34) x 109/L, (2.25±0.26) x 109/L, (0.05 +_0.06) x 109/L, (0.33±0.26)×10^9/L, (4.87±2.37)×10^9/Land (27.2 + 13.3)%, respeetively;t values were -3.449, -3.825, - 3. 554, - 3. 097, - 2. 972 and - 2. 936 respectively, P values all 〈 0. 05 ). The levels of WBC ( ( 6. 88±3.06)×10^9/L) , MOD ( (0. 20±0. 07) ×10^9/L), RBC ( (7. 79±0. 48)×10^9/L) and HCT ( (42.7± 2. 8 ) % ) in 50 mg/kg dose group were also statistically higher than those in the control group ( t values were - 2. 507, - 2. 367, - 2. 605 and - 2. 511 respectively, all P values 〈 0. 05 ). There was no statistically difference found in other bloo^t routine index and coagulation index between the three experimental groups and control group. Conclusion The long term intake of TiO2 nanopartieles caused a statistically increase in the amount of WBC anti RBC in rats with gastric ulcer; however, there was no obvious changes found in blood p]atelet and coagulation index.
出处
《中华预防医学杂志》
CAS
CSCD
北大核心
2012年第8期740-744,共5页
Chinese Journal of Preventive Medicine
基金
国家重点基础研究发展计划(973计划)(2011CB933402)
高等学校博士科点专项科研基会(新教师业)(20110001120027)
北京大学医学部新教师启动基金(BMU20100085)