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1.重庆医科大学 中医药学院,重庆 400016
2.中医药防治代谢性疾病重庆市重点实验室,重庆 400016
Received:20 November 2021,
Published Online:29 March 2022,
Published:05 July 2022
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刘云霄,黄英如,石一峰等.人参皂苷Rg1对大鼠坐骨神经冷冻保存后SCs活性及异体移植后神经再生的影响[J].中国实验方剂学杂志,2022,28(13):52-61.
LIU Yunxiao,HUANG Yingru,SHI Yifeng,et al.Effect of Ginsenoside Rg1 on Biological Activity of Cryopreserved Schwann Cells and Nerve Regeneration After Allograft in Rat Sciatic Nerve[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(13):52-61.
刘云霄,黄英如,石一峰等.人参皂苷Rg1对大鼠坐骨神经冷冻保存后SCs活性及异体移植后神经再生的影响[J].中国实验方剂学杂志,2022,28(13):52-61. DOI: 10.13422/j.cnki.syfjx.20221039.
LIU Yunxiao,HUANG Yingru,SHI Yifeng,et al.Effect of Ginsenoside Rg1 on Biological Activity of Cryopreserved Schwann Cells and Nerve Regeneration After Allograft in Rat Sciatic Nerve[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(13):52-61. DOI: 10.13422/j.cnki.syfjx.20221039.
目的
2
观察人参皂苷Rg
1
(G-Rg
1
)对冷冻保存大鼠坐骨神经施万细胞(SCs)生物学活性影响,探讨G-Rg
1
减轻冷冻保存大鼠坐骨神经SCs损伤的可行性。
方法
2
取SD大鼠双侧坐骨神经,随机分为7组:新鲜组、空白组、G-Rg
1
组(1×10
-7
、1×10
-6
、1×10
-5
、1×10
-4
、1×10
-3
mol·L
-1
G-Rg
1
),除新鲜组神经外,将其余各组神经依次置于含0、1×10
-7
、1×10
-6
、1×10
-5
、1×10
-4
、1×10
-3
mol·L
-1
G-Rg
1
的冷冻保存液中液氮保存4周。原位末端标记法(TUNEL)/S100检测各组神经SCs凋亡,蛋白免疫印迹法(Western blot)检测胱天蛋白酶(Caspase)-9、Caspase-3和主要组织相容性复合体(MHC)-Ⅰ、MHC-Ⅱ表达。将新鲜组和液氮保存4周的6组神经,置于37 ℃、5% CO
2
培养箱中培养7 d,Western blot检测胶质细胞源性神经营养因子(GDNF)、神经生长因子(NGF)表达。用液氮保存4周的空白组和1×10
-6
、1×10
-5
、1×10
-4
mol·L
-1
G-Rg
1
组坐骨神经,同种异体移植修复Wistar大鼠坐骨神经10 mm缺损(空白移植组,1×10
-6
、1×10
-5
、1×10
-4
mol·L
-1
G-Rg
1
移植组),同时设新鲜坐骨神经同种异体移植、同系移植对照组。移植术后16周,电生理检测肌肉复合动作电位(CMAP)和神经传导速度(NCV),神经丝(NF)-200免疫荧光单染、透射电镜和甲苯胺蓝染色分析再生神经组织学。
结果
2
与新鲜组比较,空白组和G-Rg
1
各浓度组Caspase-9、Caspase-3表达、SCs凋亡明显升高(
P
<
0.05,
P
<
0.01),GDNF、NGF表达及MHC-Ⅰ、MHC-Ⅱ表达显著降低(
P
<
0.01)。与空白组比较,1×10
-7
、1×10
-6
、1×10
-5
、1×10
-4
mol·L
-1
G-Rg
1
组Caspase-9、Caspase-3表达显著降低(
P
<
0.01);1×10
-7
、1×10
-6
、1×10
-5
、1×10
-4
mol·L
-1
G-Rg
1
组SCs凋亡降低(
P
<
0.05,
P
<
0.01),1×10
-3
mol·L
-1
组升高(
P
<
0.05);1×10
-7
、1×10
-6
、1×10
-5
、1×10
-4
mol·L
-1
G-Rg
1
组GDNF、NGF表达升高(
P
<
0.05,
P
<
0.01),1×10
-3
mol·L
-1
组降低(
P
<
0.01);G-Rg
1
各浓度组MHC-Ⅰ、MHC-Ⅱ表达差异无统计学意义。与1×10
-7
、1×10
-3
mol·L
-1
G-Rg
1
组比较,1×10
-6
、1×10
-5
、1×10
-4
mol·L
-1
组Caspase-3表达、SCs凋亡降低(
P
<
0.05,
P
<
0.01),GDNF、NGF表达升高(
P
<
0.05,
P
<
0.01),MHC-Ⅰ、MHC-Ⅱ表达差异无统计学意义。移植术后16周,与同系移植组比较,空白移植组和G-Rg
1
移植组各组CMAP、NCV、髓鞘厚度、有髓神经纤维数显著降低(
P
<
0.01),1×10
-6
、1×10
-4
mol·L
-1
G-Rg
1
移植组NF200降低(
P
<
0.01);与同异移植组比较,空白移植组和G-Rg
1
移植各组CMAP、NCV、NF200、髓鞘厚度、有髓神经纤维数升高(
P
<
0.05,
P
<
0.01);与空白移植组比较,G-Rg
1
移植各组CMAP、NF200、髓鞘厚度、有髓神经纤维数升高(
P
<
0.05,
P
<
0.01);G-Rg
1
移植各组间,1×10
-5
mol·L
-1
移植组各项指标优于1×10
-4
、1×10
-6
mol·L
-1
移植组(
P
<
0.05)。
结论
2
一定浓度的G-Rg
1
能维持冷冻保存的大鼠坐骨神经SCs生物活性,减轻神经冷冻保存损伤,异体移植后能促进受者神经再生。
Objective
2
To observe the effect of ginsenoside Rg
1
(G-Rg
1
) on the biological activity of cryopreserved Schwann cells (SCs) of the rat sciatic nerve and explore the feasibility of G-Rg
1
in reducing the cryopreservation-induced injury in SCs.
Method
2
Bilateral sciatic nerves of SD rats were randomly divided into a fresh group, a blank group, and five G-Rg
1
groups of different doses (1×10
-7
, 1×10
-6
, 1×10
-5
, 1×10
-4
, and 1×10
-3
mol·L
-1
). The nerves in the blank group and the G-Rg
1
groups were preserved in liquid nitrogen solutions containing 0, 1×10
-7
, 1×10
-6
, 1×10
-5
, 1×10
-4
, and 1×10
-3
mol·L
-1
G-Rg
1
for four weeks. The apoptosis of SCs was detected by TdT-mediated dUTP-biotin nick end labeling (TUNEL)/S100 immunofluorescence staining. The expression of cysteinyl aspartate-specific protease (Caspase)-9, Caspase-3, major histocompatibility complex (MHC)-Ⅰ, and MHC-Ⅱ was detected by Western blot. Subsequently, all nerves were cultured in the incubator at 37 ℃ with 5% CO
2
for 7 days. The expression of glial cell line-derived neurotrophic factor (GDNF) and nerve growth factor (NGF) was detected by Western blot. In addition, the above cryopreserved nerves in the blank group and the 1×10
-6
, 1×10
-5
, and 1×10
-4
mol·L
-1
G-Rg
1
groups were transplanted to the Wistar rats by allografting (blank transplantation group and the 1×10
-6
, 1×10
-5
, and 1×10
-4
mol·L
-1
G-Rg
1
transplantation groups), and fresh sciatic nerve allograft and isograft control group were set up. Sixteen weeks after transplantation, compound muscle action potential (CMAP) and nerve conduction velocity (NCV) were measured by electrophysiology. Nerve filament (NF)200 immunofluorescence staining, transmission electron microscopy, and toluidine blue staining were used to analyze the histology of the regenerated nerves.
Result
2
Compared with the fresh group, the blank group and the G-Rg
1
groups showed increased expression of Caspase-9, Caspase-3, and the apoptosis of SCs (
P
<
0.05,
P
<
0.01) and decreased expression of GDNF, NGF, MHC-Ⅰ, and MHC-Ⅱ (
P
<
0.01). Compared with the results in the blank group, the expression of Caspase-9 and Caspase-3 decreased in the 1×10
-7
, 1×10
-6
, 1×10
-5
,1×10
-4
mol·L
-1
G-Rg
1
groups (
P
<
0.01), and the apoptosis of SCs was reduced in the 1×10
-7
-1×10
-4
mol·L
-1
G-Rg
1
groups(
P
<
0.05,
P
<
0.01) and increased in the 1×10
-3
mol·L
-1
group (
P
<
0.05), while the expression of GDNF and NGF increased in the 1×10
-7
, 1×10
-6
, 1×10
-5
,1×10
-4
mol·L
-1
G-Rg
1
groups and decreased in the 1×10
-3
mol·L
-1
group (
P
<
0.05). There was no statistical significance in the expression of MHC-Ⅰ and MHC-Ⅱ between the blank group and the G-Rg
1
groups. Compared with the 1×10
-7
mol·L
-1
and 1×10
-3
mol·L
-1
G-Rg
1
groups, the 1×10
-6
1×10
-5
, 1×10
-4
mol·L
-1
G-Rg
1
groups showed decreased expression of Caspase-3 and the apoptosis of SCs (
P
<
0.05,
P
<
0.01) and increased expression of GDNF and NGF (
P
<
0.05,
P
<
0.01). There was no statistical significance in MHC-Ⅰ and MHC-Ⅱ expression among G-Rg
1
groups. Sixteen weeks after transplantation, compared with the isograft group, the blank transplantation group and the G-Rg
1
transplantation groups showed decreased CMAP, NCV, myelin sheath thickness, and number of myelinated nerve fibers (
P
<
0.01), and the 1×10
-6
and 1×10
-4
mol·L
-1
G-Rg
1
transplantation groups showed decreased NF200 (
P
<
0.01). Compared with the allograft group, the blank transplantation group and the G-Rg
1
transplantation groups showed increased CMAP, NCV, NF200, myelin sheath thickness, and number of myelinated nerve fibers (
P
<
0.05,
P
<
0.01). Compared with the blank transplantation group, the G-Rg
1
transplantation groups showed increased CMAP, NCV, NF200, myelin sheath thickness, and number of myelinated nerve fibers (
P
<
0.05,
P
<
0.01). Among all groups of G-Rg
1
transplantation, each index of the 1×10
-5
mol·L
-1
G-Rg
1
transplantation group was superior to that of the 1×10
-4
and 1×10
-6
mol·L
-1
G-Rg
1
transplantation group (
P
<
0.05).
Conclusion
2
G-Rg
1
at a certain centration can maintain the biological activity of cryopreserved SCs of rat sciatic nerve, alleviate the cryopreservation-induced injury of rat sciatic nerve, and promote nerve regeneration after allograft.
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