中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (8): 1593-1599.doi: 10.12307/2025.327

• 神经组织构建 nerve tissue construction • 上一篇    下一篇

Mer受体酪氨酸激酶与SD大鼠糖尿病周围神经病变的相关性

苏晓杨1,陈文婷1,付怡丹1,赵  燕1,兰丹凤2,杨秋萍1   

  1. 1昆明医科大学第一附属医院云南省代谢性疾病临床医学研究中心,云南省昆明市  650032;2云南省第一人民医院,云南省昆明市  650100
  • 收稿日期:2024-02-27 接受日期:2024-04-03 出版日期:2025-03-18 发布日期:2024-07-05
  • 通讯作者: 杨秋萍,硕士,主任医师,教授,昆明医科大学第一附属医院云南省代谢性疾病临床医学研究中心,云南省昆明市 650032
  • 作者简介:苏晓杨,女,1994年生,云南省昆明市人,汉族,硕士,医师,主要从事内分泌急危重症,尤其是糖尿病慢性并发症的研究。 并列第一作者:陈文婷,女,1997年生,江苏省淮安市人,汉族,昆明医科大学在读硕士,主要从事老年内分泌相关研究。
  • 基金资助:
    云南省科技厅科技计划项目(202001AY070001-159),项目负责人:杨秋萍

Correlation between Mer receptor tyrosine kinase and diabetic peripheral neuropathy in Sprague-Dawley rats

Su Xiaoyang1, Chen Wenting1, Fu Yidan1, Zhao Yan1, Lan Danfeng2, Yang Qiuping1   

  1. 1Yunnan Province Clinical Research Center for Metabolic diseases, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China; 2The First People’s Hospital of Yunnan Province, Kunming 650100, Yunnan Province, China
  • Received:2024-02-27 Accepted:2024-04-03 Online:2025-03-18 Published:2024-07-05
  • Contact: Yang Qiuping, Master, Chief physician, Professor, Yunnan Province Clinical Research Center for Metabolic diseases, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
  • About author:Su Xiaoyang, Master, Physician, Yunnan Province Clinical Research Center for Metabolic diseases, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China Chen Wenting, Master candidate, Yunnan Province Clinical Research Center for Metabolic diseases, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China Su Xiaoyang and Chen Wenting contributed equally to this work.
  • Supported by:
    Science and Technology Program of Yunnan Provincial Science and Technology Department, No. 202001AY070001-159 (to YQP)

摘要:


文题释义:
Mer受体酪氨酸激酶 (mer receptor tyrosine kinase,MerTK):是受体酪氨酸激酶家族TAM(Tyro3、Axl和Mertk)成员之一,广泛表达于神经细胞和神经胶质细胞等多种细胞中。通过与MerTK配体生长抑制特异性 6 (Gas6)或/和蛋白 S (Pros1)的结合,桥接凋亡细胞与吞噬细胞,促进了凋亡细胞的吞噬,它在凋亡细胞的清除、固有免疫应答以及炎症反应中有重要作用。
糖尿病性周围神经病(diabetic peripheral neuropathy,DPN):是糖尿病最常见的慢性并发症之一,是一组以感觉和自主神经症状为主要临床表现的周围神经病。它与糖尿病肾病和糖尿病视网膜病变共同构成糖尿病三联症。目前公认糖尿病周围神经病变的发生是高血糖、脂代谢紊乱以及胰岛素信号通路异常等多种代谢因素共同作用的结果。

背景:糖尿病周围神经病变的发病机制目前尚未明确,TAM(Tyro3、Axl和MerTK)受体酪氨酸激酶具有控制中枢神经系统凋亡细胞和抑制炎症反应的作用。
目的:探讨2型糖尿病及其周围神经病变SD大鼠血浆及坐骨神经组织Mer受体酪氨酸激酶水平的差异,研究Mer受体酪氨酸激酶与糖尿病周围神经病变的关联性。
方法:40只雄性SD大鼠随机分为对照组15只、2型糖尿病组10只及2型糖尿病周围神经病变组15只。对照组大鼠喂普通饲料,实验组大鼠行高脂高糖饮食6周,并腹腔内注射单剂量小剂量链脲佐菌素35 mg/kg,14 d尾静脉取血检测血糖≥16.7 mmol/L为2型糖尿病造模成功。周围神经病变组大鼠动物继续高糖、高脂喂养8周。麻醉后活体分离检测大鼠坐骨神经传导速度,腹主动脉取血,取坐骨神经组织。光镜下观察各组神经纤维组织学改变,确认糖尿病周围神经病变造模成功。ELISA检测大鼠外周血血糖、血脂及血清MerTK水平,苏木精-伊红染色观察坐骨神经组织学改变;免疫荧光、免疫组化及免疫蛋白印迹检测坐骨神经组织中MerTK的表达。
结果与结论:①实验成功构建SD大鼠2型糖尿病及2型糖尿病周围神经病变大鼠模型,糖尿病周围神经病变成模率80%;与对照组比较,2型糖尿病及糖尿病周围神经病变组大鼠血糖水平显著升高(P < 0.000 1),糖尿病周围神经病变组高于2型糖尿病组;坐骨神经传导速度明显下降(P < 0.05),糖尿病周围神经病变组低于2型糖尿病组。②组织学检查:与对照组相比,2型糖尿病组大鼠坐骨神经核减少,有部分空泡变性,出现吞噬细胞;糖尿病周围神经病变组胞体肿胀,核间距增大,出现空泡变性,髓鞘周围出现隔断、不平滑,轴索变为网格状。③血清中MerTK水平:糖尿病周围神经病变组显著高于对照组(P < 0.05)。④坐骨神经组织中MerTK的表达:与对照组比较,糖尿病周围神经病变组中明显上调(P < 0.05)。⑤结论:糖尿病周围神经病变大鼠血浆及坐骨神经组织中Mer受体酪氨酸激酶水平升高,推测与其抗炎及免疫调节作用有关。
https://orcid.org/0009-0009-9539-9141(苏晓杨);https://orcid.org/0009-0008-8659-4271(陈文婷)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: Mer受体酪氨酸激酶, 糖尿病周围神经病变, 生物学标记物, 2型糖尿病, SD大鼠

Abstract: BACKGROUND: The pathogenesis of diabetic peripheral neuropathy has not yet been clarified, and TAM (Tyro3, Axl, and MerTK) receptor tyrosine kinases can control apoptotic cells and suppress inflammatory responses in the central nervous system.
OBJECTIVE: To investigate the difference of Mer receptor tyrosine kinase (MerTK) levels in plasma and sciatic nerve tissue of Sprague-Dawley rats with type 2 diabetes and diabetic peripheral neuropathy, and to study the correlation between MerTK and diabetic peripheral neuropathy. 
METHODS: Forty male Sprague-Dawley were randomly divided into control group with 15 rats, type 2 diabetes group with 10 rats, and diabetic peripheral neuropathy group with 15 rats. The control group was fed with ordinary diet, while the experimental groups were fed with high-fat and high-sugar diet. After 6 weeks, intraperitoneal injection of streptozotocin at the minimum dose of 35 mg/kg was administered in the two experimental groups. After 14 days, tail vein blood was collected to detect blood glucose. If blood glucose ≥ 16.7 mmol/L, the model of type 2 diabetes was successfully established. Rats in the diabetic peripheral neuropathy group continued to be fed with a high-sugar and high-fat diet for 8 weeks. The sciatic nerve conduction velocity of rats was detected through live isolation under anesthesia. Blood samples were collected from the abdominal aorta, and the sciatic nerve tissue was collected. Histological changes of nerve fibers in each group were observed under a light microscope to confirm the success of diabetic peripheral neuropathy modeling. ELISA was used to detect peripheral blood glucose, blood lipids and serum MerTK levels in rats; hematoxylin-eosin staining was used to observe the histological changes in the sciatic nerve; immunofluorescence, immunohistochemistry and western blot were used to detect the expression of MerTK in the sciatic nerve tissue. 
RESULTS AND CONCLUSION: The Sprague-Dawley rat models of type 2 diabetes and type 2 diabetes peripheral neuropathy were successfully constructed, and the modeling rate of diabetic peripheral neuropathy was 80%. Compared with the control group, the blood glucose levels of rats in the type 2 diabetes and diabetic peripheral neuropathy groups were significantly higher (P < 0.000 1), while the blood glucose level in the diabetic peripheral neuropathy group was higher than that in the type 2 diabetes group; and the sciatic nerve conduction velocity was significantly decreased (P < 0.05), which was lower in the diabetic peripheral neuropathy group than the type 2 diabetes group. Histological examination: Compared with the control group, the sciatic nerve nuclei were reduced in the type 2 diabetes group, with some vacuolar degeneration and phagocytosis; in the diabetic peripheral neuropathy group, the cell body was swollen, the nuclear spacing was increased, vacuolar degeneration was observed, and the myelin sheath was partitioned and unsmooth, and lattice-like axons appeared. Serum MerTK levels were significantly higher in the diabetic peripheral neuropathy group than the control group. Expression of MerTK in the sciatic nerve tissue was significantly upregulated in the diabetic peripheral neuropathy group compared with the control group (P < 0.05). To conclude, elevated levels of MerTK in plasma and sciatic nerve tissue of rats with diabetic peripheral neuropathy are presumably related to its anti-inflammatory and immunomodulatory effects.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

Key words: Mer receptor tyrosine kinase, diabetic peripheral neuropathy, biological marker, type 2 diabetes, Sprague-Dawley rat

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