2008年7月第18卷第7期
中国比较医学杂志
CHINESEJOURNAL
OF
July,2008V01.18
No.7
COMPARATIVEMEDICINE
希e≈∞荫g婶)§研究报告¥
8m∞、!#、e;;、妙
高脂饮食ApoE基因敲除小鼠不同部位动脉
粥样硬化斑块的分析比较
晏沐阳1,翟永志1,刘
(1.解放军总医院老年心血管研究所,北京
博2,张云凤2,彭勃1
100853;2.北京大学医学部,北京
100083)
【摘要】目的
比较高脂喂养的apoE基因敲除小鼠主动脉窦部和头臂动脉粥样硬化斑块的病理组织学状
况。方法选取6周龄雄性纯合子anpE基因敲除小鼠30只,均予以西方饮食喂养,分别在30周龄、42周龄、54周龄、66周龄、78周龄时,随机各取6只,取主动脉窦和头臂动脉做病理检测。酶法检测血脂情况,冰冻切片光镜下观察主动脉窦部和无名动脉粥样硬化斑块病理情况,vonkossa染色观察斑块钙化情况。结果
高脂喂养可使apoE基
因敲除小鼠迅速形成广泛且典型的动脉粥样硬化斑块,随时间进展,斑块体积逐渐增加,钙化逐渐加重;头臂动脉斑块出现较主动脉窦早且更加明显,斑块内包埋纤维帽,在主动脉窦斑块未见,但斑块钙化以主动脉窦部斑块最显著。结论高脂喂养apeE基因敲除小鼠是较为理想的动脉粥样硬化动物模型,头臂动脉是观察斑块不稳定的较为理想的窗口,而研究比较稳定斑块钙化,主动脉窦部更为理想。
【关键词】
载脂蛋白E;动脉粥样硬化;钙化;小鼠
【文献标识码】A
【文章编号】1671.7856(2008)07.0009.04
【中图分类号】R363
AdvancedPlaquesinAorticSinusandBrachiocephalicArteryin
ApolipoprOteinEKnock out
YANMu-yang‘,ZHAI
Mice
130‘
Yong-zhil,LIU略,ZHANGYun—fe《,PENG
General
(I.InstituteofGeriatricCardiovascularinPLA
Hospital,Beijing100853,China;
2.PekingUniversityScienceandMedicineCenter,Beijing100853,China)
【Abstract】Objective
Toobserve
pathological
characteristicsofatherosclemtic
plaques
were
inaortic
a
sinus
western
and
diet
braehiocephalicarteryinApoEknock
whenthey
were
out
micewith
were
westem-diet.Methodssacrificed
at
30male
apoE"“mice
fedwith
78
6weeksold.Six
apolE“micerandomwhentheywere30、42、54、66
andweeksoldfor6erum
]ipidsandpathologicaldetermination.Frozen
slidesofaorticsinusandbrachiocephalicarterywerestainedwithhematoxylinand
a
eusin,oilred“0”,and
The
von
knssa.Analysisw鼬performedwith
to
computerized嘶analysisprogram(Image
mice
analysis.Thebmchiocephalic
Pro
Plus).Results
aorticsinusisrelativelystraightforward
locateforhistologicalprocessing,andinconsequencestandardizationaoro自8studies
at
andlaboratoriesiseasy.Thelesionsthateventuallydevelopthat
a
thissiteinapoEknockouta托largeandlipid rich。meaning
a
simplelipidstainsuch
a8
oilred0Can
beusedtoaidmorphometricarteryis
sitewhere
mpturedplaqueshavebeenreportedtooccurintheapoEknockoutmouse.Lesionsdeveloprapidlyatthissite,especiallyunderconditionsofhiglI.fat-feeding.Onthenegativeside,thisvesselisverysmallandconsequentlydifficult
Conclusions
ApoE.,.mice
with
weatern
to
processforhistology.atherosclerotic
dietfor
a
long
time
are
good
animalmodelsfor
advanced
a
phques
research.Thebrachiocephalic
other
parts
arteryis
tree
a
sitewhereruptured
plaquesocCUr.Theaorticsinusisnonvulnerablecomparatorsitefor
ofthemurinearterialwhere
mDn嘲do
ocCUr.
【基金项目】国家自然科学基金资助(项目批准号:30470267)。
【通讯作者】晏沐阳。E,-mail:ymmmyang@sins.咖