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链脲佐菌素诱导的糖尿病动物模型

发布者:biolead 发布时间:2019-12-08 分享到:

链脲佐菌素对一定种属动物的胰岛β细胞有选择性破坏作用,能诱发许多动物产生糖尿病,一般采用大鼠和小鼠制造动物模型。国外有学者报道选用雄性大鼠制造模型的成模率明显高于雌性大鼠。1型糖尿病与2型糖尿病动物模型的制备与STZ注射的剂量有关系:大剂量注射时,由于直接引起胰岛β细胞的广泛破坏,可造成1型糖尿病模型;而注射较少量STZ时,由于只是破坏一部分胰岛β细胞的功能,造成外周组织对胰岛素不敏感,同时给予高热量饲料喂养,两者结合便诱导出病理、生理改变都接近于人类2型糖尿病的动物模型。

造膜前的喂养

Ⅰ型糖尿病模型成模比较快,通常大鼠在普通饲料适应性喂养2周后即可开始造模。

Ⅱ型糖尿病模型:高脂饮食诱导加小剂量STZ。造模前喂以高脂(高糖)饲料,诱发出胰岛素抵抗。

常用给药剂量

Ⅰ型糖尿病模型:大鼠剂量为70~65mg/Kg

Ⅱ型糖尿病模型:高糖高脂喂养1~2 个月的大鼠,STZ 剂量在25~40mg/Kg ,或参考文献(鼠均重不同,本剂量以200克均重为例)。

腹腔注射和尾部注射的区别

尾部注射即静脉注射,药物利用率较高,同比腹腔注射,可以节省药量,缺点是操作起来不如腹腔注射方便。

注射前有那些操作步骤?

过夜禁食后称重,按大鼠总重量比称取STZ,放一干燥灭菌瓶内,外用锡纸包好,将柠檬酸缓冲液及装STZ的瓶子置冰浴,一起带到动物房,如果注射操作技术不熟练,应两组交替注射,建议分组溶解STZ,比如10只或15只鼠/组。

品牌

货号

产品名称

规格

备注

Sigma

S0130

Streptozocin 链脲佐菌素(STZ)

100mg

现货

Sigma

S0130

Streptozocin 链脲佐菌素(STZ)

500mg

现货

Sigma

S0130

Streptozocin 链脲佐菌素(STZ)

1g

现货

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