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1.湖南中医药大学,长沙 410208
2.广州中医药大学 第七临床医学院 附属宝安中医院,广东 深圳 518100
3.湖南医药学院,湖南 怀化 418000
Received:10 June 2022,
Published Online:22 July 2022,
Published:05 October 2022
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陆包伟,刘露梅,王能等.龟鹿二仙胶对糖尿病大鼠生殖损伤的保护作用及机制[J].中国实验方剂学杂志,2022,28(19):1-8.
LU Baowei,LIU Lumei,WANG Neng,et al.Protective Effect of Guilu Erxianjiao on Reproductive Injury in Diabetic Rats and Its Mechanism[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(19):1-8.
陆包伟,刘露梅,王能等.龟鹿二仙胶对糖尿病大鼠生殖损伤的保护作用及机制[J].中国实验方剂学杂志,2022,28(19):1-8. DOI: 10.13422/j.cnki.syfjx.20221936.
LU Baowei,LIU Lumei,WANG Neng,et al.Protective Effect of Guilu Erxianjiao on Reproductive Injury in Diabetic Rats and Its Mechanism[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(19):1-8. DOI: 10.13422/j.cnki.syfjx.20221936.
目的
2
探索龟鹿二仙胶改善糖尿病大鼠生殖损伤的疗效及可能作用机制。
方法
2
将53只SD雄鼠随机分成5组,选取其中1组作为正常组,剩余4组合并成造模组用高脂饲料喂养联合30 mg·kg
-1
链脲佐菌素(STZ)腹腔注射建立糖尿病模型,以连续3次随机血糖均
>
16.7 mmol·L
-1
作为纳入糖尿病生殖损伤模型标准。将成模的大鼠按血糖高低随机分成模型组、龟鹿二仙胶组(2 g·kg
-1
)、维生素E组(0.03 g·kg
-1
)、五子衍宗丸组(0.6 g·kg
-1
),给予相应药物剂量灌胃,每天1次,连续治疗4周,每周测体质量和血糖。4周后取材进行指标检测,苏木素-伊红(HE)染色观察睾丸及附睾组织形态学变化,原位末端标记法(TUNEL)染色观察睾丸细胞凋亡情况;精液分析仪检测精子浓度和精子活力;酶联免疫吸附测定法(ELISA)检测血清卵泡刺激素(FSH)、黄体生成素(LH)、睾酮(T)水平;ELISA检测睾丸组织超氧化物歧化酶(SOD)、丙二醇(MDA)、活性氧(ROS)、谷胱甘肽过氧化物酶(GSH-Px)含量;蛋白免疫印迹法(Western blot)检测睾丸组织Nrf2、HO-1、Bax、Bcl-2蛋白表达。
结果
2
与正常组比较,模型组大鼠睾丸组织萎缩,生精小管数量减少,附睾管壁增生,管腔狭窄;精子浓度和活力下降(
P
<
0.01);血清T、FSH和LH水平降低(
P
<
0.01);睾丸中ROS和MDA含量增加(
P
<
0.01),SOD和GSH-Px水平减少(
P
<
0.01);Bax表达增加(
P
<
0.01),Nrf2、HO-1、Bcl-2表达降低(
P
<
0.01)。与模型组比较,龟鹿二仙胶组睾丸及附睾组织病变得到一定改善;精子浓度和活力提升(
P
<
0.05,
P
<
0.01);血清T和LH含量上升(
P
<
0.05,
P
<
0.01),FSH含量差异无统计学意义;睾丸中ROS和MDA含量降低(
P
<
0.01),SOD和GSH-Px水平增加(
P
<
0.01);Bax表达下降(
P
<
0.01),Nrf2、HO-1、Bcl-2表达上升(
P
<
0.05,
P
<
0.01)。
结论
2
龟鹿二仙胶能在一定程度上改善糖尿病大鼠生殖损伤,提升精子质量,其机制可能与改善氧化应激,抗凋亡作用有关。
Objective
2
To explore the effect of Guilu Erxianjiao on improving reproductive injury in diabetic rats and its possible mechanism.
Method
2
Fifty-three SD male rats were randomly divided into 5 groups, with 1 group as the normal group and the other 4 groups as the modeling groups. Rats in the modeling groups were fed with a high-fat diet combined with 30 mg·kg
-1
streptozotocin (STZ) intraperitoneal injection to induce diabetes, with the random blood glucose
>
16.7 mmol·L
-1
for 3 consecutive times as the criteria for inclusion in the model of diabetic reproductive injury. The rats with diabetic reproductive injury were then randomly divided into a model group, a Guilu Erxianjiao group (2 g·kg
-1
), a Vitamin E group (0.03 g·kg
-1
), and a Wuzi Yanzong pill group (0.6 g·kg
-1
) according to the blood glucose level. The rats were given the corresponding drug dose intragastric administration, once a day for 4 weeks, and their body weight and blood glucose were measured weekly. After 4 weeks, samples were collected for index determination. Morphological changes in testis and epididymis were observed by hematoxylin-eosin (HE) staining, and apoptosis of testis cells was observed by
in situ
end labeling (TUNEL) staining. Sperm concentration and motility were detected by the semen analyzer. Serum levels of follicle-stimulating hormone (FSH), luteinizing hormone (LH), and testosterone (T) were determined by enzyme-linked immunosorbent assay (ELISA). The content of superoxide dismutase (SOD), propylene glycol (MDA), reactive oxygen species (ROS), and glutathione peroxidase (GSH-Px) in the testicular tissue was determined by ELISA. The expressions of nuclear respiratory factor-2 (Nrf2), heme oxygenase 1 (HO-1), B-cell lymphoma-2 (Bcl-2), and Bcl-2 associated X protein (Bax) in the testicular tissue were detected by Western blot.
Result
2
As compared with the normal group, testicular tissue atrophy, decreased spermatogenic tubules, epididymal wall hyperplasia, and lumen stenosis were observed in the model group. Sperm concentration and motility decreased (
P
<
0.01), and serum levels of T, FSH, and LH decreased (
P
<
0.01) in the model group. The content of ROS and MDA in the testis increased (
P
<
0.01), while that of SOD and GSH-Px decreased (
P
<
0.01) in the model group. The expression of Bax increased (
P
<
0.01), and the expressions of Nrf2, HO-1, and Bcl-2 decreased (
P
<
0.01) in the model group. As compared with the model group, the pathological changes in the testis and epididymis in the Guilu Erxianjiao group were improved to some extent. Sperm concentration and motility increased (
P
<
0.05,
P<
0.01). In the Guilu Erxianjiao group, serum levels of T and LH increased (
P<
0.05,
P
<
0.01), while FSH levels showed no significant difference. The content of ROS and MDA in the testis decreased (
P
<
0.01), while that of SOD and GSH-Px increased (
P
<
0.01) in the Guilu Erxianjiao group. The expression of Bax decreased (
P
<
0.01), and the expressions of Nrf2, HO-1, and Bcl-2 increased (
P
<
0.05,
P
<
0.01) in the Guilu Erxianjiao group.
Conclusion
2
Guilu Erxianjiao improves the reproductive injury and sperm quality of diabetic rats to a certain extent, and the mechanism may be related to the improvement of oxidative stress and anti-apoptosis.
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