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1.上海中医药大学,上海 201203
2.上海中医药大学 附属光华医院,上海 200052
张永琪,在读硕士,从事痛风、高尿酸血症研究,E-mail:z18638253379@163.com
戴号,硕士,副主任医师,从事痛风、高尿酸血症、足踝、创伤疾病,E-mail:13564799291@163.com
收稿日期:2022-04-25,
网络出版日期:2022-08-03,
纸质出版日期:2022-11-20
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张永琪,陈杰伟,叶博闻等.四妙丸上调高尿酸血症大鼠小肠ABCG2表达促进肠道尿酸排泄的作用[J].中国实验方剂学杂志,2022,28(22):33-39.
ZHANG Yongqi,CHEN Jiewei,YE Bowen,et al.Simiaowan Up-regulates Intestinal ABCG2 Expression to Promote Intestinal Uric Acid Excretion in Hyperuricemia Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(22):33-39.
张永琪,陈杰伟,叶博闻等.四妙丸上调高尿酸血症大鼠小肠ABCG2表达促进肠道尿酸排泄的作用[J].中国实验方剂学杂志,2022,28(22):33-39. DOI: 10.13422/j.cnki.syfjx.20221601.
ZHANG Yongqi,CHEN Jiewei,YE Bowen,et al.Simiaowan Up-regulates Intestinal ABCG2 Expression to Promote Intestinal Uric Acid Excretion in Hyperuricemia Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(22):33-39. DOI: 10.13422/j.cnki.syfjx.20221601.
目的
2
研究四妙丸对高尿酸血症大鼠小肠三磷酸腺苷结合盒转运蛋白G2(ABCG2)表达和肠道尿酸排泄的影响。
方法
2
48只雄性SD大鼠随机分为正常组、模型组、苯溴马隆组(4.7 mg·kg
-1
)和四妙丸高、中、低剂量组(2 260.6、1 130.3、565.2 mg·kg
-1
),每组8只。以氧嗪酸钾和次黄嘌呤制备高尿酸血症模型,连续21 d。第8天予相应药物干预,1次/d,持续14 d。第21天处死大鼠,检测血尿酸、肠道尿酸、血肌酐、血尿素氮等指标,以蛋白免疫印迹法(Western blot)检测大鼠小肠ABCG2蛋白表达,实时荧光定量聚合酶链式反应(Real-time PCR)检测小肠ABCG2 mRNA表达,免疫组化法检测小肠ABCG2蛋白表达和定位。
结果
2
与正常组比较,模型组血尿酸、血肌酐、血尿素氮显著升高(
P
<
0.01);与模型组比较,四妙丸各剂量组和苯溴马隆组大鼠血尿酸水平均显著降低(
P
<
0.01),四妙丸中、低剂量组肠道尿酸明显升高(
P
<
0.05,
P
<
0.01),苯溴马隆组血肌酐显著升高(
P
<
0.01),低剂量组血尿素氮明显降低(
P
<
0.05),四妙丸低剂量组与苯溴马隆组血尿酸比较差异无统计学意义。Western blot结果显示,与正常组比较,模型组ABCG2蛋白表达明显下降(
P
<
0.05);与模型组比较,四妙丸中、低剂量组ABCG2蛋白表达水平明显升高(
P
<
0.05,
P
<
0.01),四妙丸高剂量组及苯溴马隆组升高但差异无统计学意义。Real-time PCR分析显示,与正常组比较,模型组ABCG2 mRNA表达差异无统计学意义;与模型组比较,四妙丸中、低剂量组ABCG2 mRNA表达明显升高(
P
<
0.05)。免疫组化显示,ABCG2蛋白主要分布于肠绒毛,与正常组比较,模型组ABCG2蛋白表达差异无统计学意义;与模型组比较,四妙丸各剂量组ABCG2蛋白表达明显升高(
P
<
0.05)。
结论
2
四妙丸可显著降低高尿酸血症大鼠血尿酸,其中低剂量四妙丸具有与苯溴马隆等效的降尿酸作用,同时可保护肾功能,其机制可能与上调肠道ABCG2表达促进肠道尿酸排泄有关。
Objective
2
To observe the effect of Simiaowan on the intestinal ATP-binding cassette superfamily G (White) member 2 (ABCG2) expression and the intestinal uric acid excretion in hyperuricemia rats.
Method
2
A total of 48 SD male rats were randomized into the normal, model, benzbromarone (4.7 mg·kg
-1
), and high-, medium-, low-dose Simiaowan groups (2 260.6, 1 130.3, 565.2 mg·kg
-1
, respectively), with 8 rats in each group. Potassium oxonate and hypoxanthine was employed to induce hyperuricemia in rats (21 days). On the 8
th
day, administration began (once a day for 14 days). Rats were killed on the 21
st
day, and serum uric acid, serum creatinine, blood urea nitrogen, and intestinal uric acid were detected. The protein expression of ABCG2 in the small intestine was detected by Western blot. The ABCG2 protein expression and localization in intestinal tissues were determined by immunohistochemistry. The ABCG2 mRNA expression in small intestine was measured by quantitative real-time PCR.
Result
2
The levels of serum uric acid, serum creatinine, and blood urea nitrogen in the model group were higher than those in the normal group (
P
<
0.01). Low level of serum uric acid in the three Simiaowan groups and benzbromarone group (
P
<
0.01), high level of intestinal uric acid in medium-dose and low-dose Simiaowan groups (
P
<
0.05,
P
<
0.01), high level of serum creatinine in benzbromarone group (
P
<
0.01), and low level of blood urea nitrogen in low-dose Simiaowan group (
P
<
0.05) were observed as compared with those in the model group. Serum uric acid showed insignificant difference between the low-dose Simiaowan group and benzbromarone group. The expression of ABCG2 protein in the model group was lower than that in the normal group (
P
<
0.05). The expression of ABCG2 protein in the medium-dose and low-dose Simiaowan groups (
P
<
0.05,
P
<
0.01), the high-dose Simiaowan group, and benzbromarone group increased as compared with that in the model group. ABCG2 mRNA expression was insignificantly different between the model group and the normal group, while the expression in the medium-dose and low-dose Simiaowan groups was higher than that in the model group (
P
<
0.05). ABCG2 protein was mainly distributed in intestinal villi, and ABCG2 protein expression demonstrated no significant difference between the model group and the normal group. The ABCG2 protein expression in the three Simiaowan groups increased as compared with that in the model group (
P
<
0.05).
Conclusion
2
Simiaowan can significantly reduce the serum uric acid level in hyperuricemia rats. Particularly, the low-dose Simiaowan shows similar efficacy to benzbromarone in lowering uric acid and protects renal function. The mechanism is the likelihood that it up-regulates intestinal ABCG2 expression to promote intestinal excretion of uric acid.
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