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J Acupunct Res > Volume 31(2); 2014 > Article
Lee, Lee, Lee, Lee, Lee, Jeong, Cheong, Yang, Kim, and Cho: Inhibitory Effects of Filiform Acupuncture and Laser Acupuncture at the Points of Zhongzhu(TE3)·Zulinqi(GB41) on Neuropathic Pain in the Tibial and Sural Nerve Injury-induced Rats

Abstract

Objectives:

The purpose of this study was to investigate the analgesic effects of filiform acupuncture and laser acupuncture at the points of TE3·GB41 in neuropathic pain induced rats.

Methods:

Neuropathic pain in rats was induced by partial resection of the tibial and sural nerves. Three weeks after the neuropathic surgery, each of the experimental groups(AT, LAT, AT + LAT and LAT + AT) was injected at the TE3·GB41 twice per week for three weeks.

Results:

  1. All of the experimental groups(AT, LAT, AT + LAT and LAT + AT) showed a significant decrease in the plantar withdrawal response of allodynia and the thermal allodynia as compared with the control group. During the early phase, the AT and AT + LAT groups have been marked as more significant than the LAT + AT and LAT groups.

  2. The expression of c-Fos significantly decreased in the LAT and LAT + AT groups as compared with the control group.

  3. The LAT + AT group showed a significant decrease in Bax as compared with the control group. In each experimental groups(AT, LAT, AT + LAT and LAT + AT), Bcl-2 increased and Bax/Bcl-2 ratio decreased as compared with the control group.

  4. The LAT, AT + LAT and LAT + AT groups showed a significant increase in mGluR5 as compared with the control group.

Conclusions:

These results represented that the filiform acupuncture and laser acupuncture at the TE3·GB41 exerted anti-apoptotic and neuroprotective effects on the model of neuropathic pain, thereby suggesting that they should be available for decreasing mechanical allodynia.

Fig. 1.
Effect of AT, LAT, AT + LAT and LAT + AT treatments on the reaction time of Von Frey in tibial and sural nerve injury rats
A description of controls and experimental groups refer to Table 1.
## : p<0.01 compared with normal.
*: p<0.05, ** : p<0.01 compared with control.
acupunct-31-2-119-12f1.gif
Fig. 2.
Effect of AT, LAT, AT + LAT and LAT + AT treatments on the force of Von Frey in tibial and sural nerve injury rats
A description of controls and experimental groups refer to Table 1.
## : p<0.01 compared with normal.
*: p<0.05, ** : p<0.01 compared with control.
acupunct-31-2-119-12f2.gif
Fig. 3.
Effects of AT, LAT, AT + LAT and LAT + AT treatments on the trajectory of thermal gradient in tibial and sural nerve injury rats
A description of controls and experimental groups refer to Table 1.
acupunct-31-2-119-12f3.gif
Fig. 4.
Effect of AT, LAT, AT + LAT and LAT + AT Treatment on the c-Fos protein in tibial and sural Nerve injury rats
Values are expressed mean ± SE.
A description of controls and experimental groups refer to Table 1.
## : p<0.01 compared with normal.
**: p<0.01 compared with control.
acupunct-31-2-119-12f4.gif
Fig. 5.
Representive microphotographs of coronal sections for observation of c-Fos expression in central gray of brain of tibial and sural nerve injury rats
A description of controls and experimental groups refer to Table 1.
acupunct-31-2-119-12f5.gif
Fig. 6.
Effect of AT, LAT, AT + LAT and LAT + AT treatments on the Bax contents in tibial and sural nerve injury rats
Values are expressed mean ± SE
A description of controls and experimental groups refer to Table 1.
## : p<0.01 compared with normal.
**: p<0.01 compared with control.
acupunct-31-2-119-12f6.gif
Fig. 7.
Effect of AT, LAT, AT + LAT and LAT + AT treatments on the Bcl-2 contents in tibial and sural nerve injury rats
Values are expressed mean ± SE.
A description of controls and experimental groups refer to Table 1.
## : p<0.01 compared with normal.
*: p<0.05, ** : p<0.01 compared with control.
acupunct-31-2-119-12f7.gif
Fig. 8.
Effect of AT, LAT, AT + LAT and LAT + AT treatments on the Bax/Bcl-2 ratio in tibial and sural nerve injury rats
Values are expressed mean ± SE.
A description of controls and experimental groups refer to Table 1. ## : p<0.01 compared with normal.
*: p<0.05 compared with control.
acupunct-31-2-119-12f8.gif
Fig. 9.
Effect of AT, LAT, AT + LAT and LAT + AT treatments on the mGluR5 contents in tibial and sural nerve injury rats
Values are expressed mean ± SE.
A description of controls and experimental groups refer to Table 1.
## : p<0.01 compared with normal.
*: p<0.05 compared with control.
acupunct-31-2-119-12f9.gif
Table 1.
Effect of AT, LAT, AT + LAT and LAT + AT Treatments on the Reaction Time of Withdrawal Rresponse to Mechanical Allodynia in Tibial and Sural Nerve Injury Rats (sec)
Group Injury of tibial &sural nerve Treatment(times)
Before After 1st 2nd 3rd 4th 5th 6th
Nor 7.2 ± 0.1 7.4 ± 0.3 7.4 ± 0.4 7.2 ± 0.5 7.4 ± 0.1 6.9 ± 0.2 6.8 ± 0.3 7.0 ± 0.3
Con 7.1 ± 0.1 4.0 ± 0.2## 3.4 ± 0.4## 3.2 ± 0.4## 3.4 ± 0.6## 3.5 ± 0.5## 3.7 ± 0.5## 4.0 ± 0.2##
AT 7.1± 0.2 4.1± 0.4 4.8± 0.1* 5.5 ± 0.3** 4.5 ± 0.3 5.1 ± 0.3** 5.2 ± 0.5* 5.6 ± 0.3**
LAT 7.3 ± 0.2 4.3 ± 0.4 3.9 ± 0.3 4.3 ± 0.4 4.6 ± 0.6 4.8 ± 0.5* 5.2 ± 0.3* 5.8 ± 0.3**
AT + LAT 7.2 ± 0.2 4.3 ± 0.2 4.5 ± 0.3 4.3 ± 0.3* 4.2 ± 0.6 4.5 ± 0.3 5.1 ± 0.6 5.7 ± 0.2**
LAT + AT 7.2 ± 0.1 4.1 ± 0.3 4.0 ± 0.3 4.7 ± 0.8 4.9 ± 0.2* 5.4 ± 0.4** 5.9 ± 0.6* 5.8 ± 0.3**

Values are expressed mean ± SE.

Nor : normal group.

Con : tibial and sural nerve injury and no treatment group.

AT : tibial and sural nerve injury and traditional acupuncture treatment at TE3·GB41.

LAT : tibial and sural nerve injury and low level laser 830 nm treatment at TE3·GB41.

AT + LAT : tibial and sural nerve injury and traditional acupuncture treatment + low level laser 830 nm treatment at TE3·GB41.

LAT + AT : tibial and sural nerve injury and low level laser 830 nm treatment + traditional acupuncture treatment at TE3·GB41.

## p<0.01 compared with normal.

* p<0.05,

** p<0.01 compared with control.

Table 2.
Effect of AT, LAT, AT + LAT and LAT + AT Treatments on the Force Intensity of Withdrawal Response to Mechanical Allodynia in Tibial and Sural Nerve Injury Rats (g)
Group Injury of tibial & sural nerve Treatment(times)
Before After 1st 2nd 3rd 4th 5th 6th
Nor 35.6 ± 0.3 37.0 ± 1.6 37.0 ± 2.0 35.9 ± 2.6 36.1 ± 1.0 34.8 ± 1.0 34.0 ± 1.4 34.3 ± 0.8
Con 35.3 ± 0.4 19.5 ± 1.1## 17.2 ± 1.7## 16.3 ± 1.8## 17.0 ± 3.0## 17.5 ± 2.2## 18.8 ± 2.7## 20.3 ± 1.1##
AT 35.4 ± 0.8 20.4 ± 2.0 24.0 ± 0.4** 27.5 ± 1.3** 22.8 ± 1.3 25.7 ± 1.4** 26.3 ± 2.3* 28.0 ± 1.6**
LAT 35.9 ± 0.7 19.4 ± 2.2 19.7 ± 1.4 21.7 ± 2.1 23.4 ± 2.9 24.2 ± 2.3* 25.9 ± 1.7* 29.4 ± 1.3**
AT + LAT 36.0 ± 0.9 18.1 ± 1.1 22.8 ± 1.2* 21.8 ± 1.6* 21.2 ± 2.8 23.0 ± 1.5* 25.6 ± 2.9 28.8 ± 0.9**
LAT + AT 35.7 ± 0.1 18.2 ± 1.6 20.3 ± 1.3 23.8 ± 4.0 24.7 ± 1.2* 27.2 ± 1.9** 29.4 ± 3.0* 29.2 ± 1.4**

Values are expressed mean ± SE.

A description of controls and experimental groups refer to Table 3.

## p<0.01 compared with normal.

* p<0.05,

** p<0.01 compared with control.

Table 3.
Effect of AT, LAT, AT + LAT and LAT + AT Treatments on the Total Distance of Thermal Gradient in Tibial and Sural Nerve Injury Rats (%)
Group Before (baseline) Treatment(times)

2 4 6
Nor 100.0 ± 0.0 108.0 ± 7.6 103.0 ± 4.4 108.9 ± 11.7
Con 100.0 ± 0.0 121.1 ± 8.0 124.1 ± 5.3# 128.9 ± 6.7
AT 100.0 ± 0.0 123.8 ± 8.0 112.6 ± 6.7 98.2 ± 9.0*
LAT 100.0 ± 0.0 137.5 ± 11.7 133.5 ± 29.6 102.3 ± 5.0*
AT + LAT 100.0 ± 0.0 111.1 ± 18.2 105.2 ± 17.0 99.3 ± 11.9*
LAT + AT 100.0 ± 0.0 113.6 ± 17.1 120.4 ± 18.4 93.4 ± 12.8*

Values are expressed mean ± SE.

A description of controls and experimental groups refer to Table 3.

# p<0.05 compared with normal.

* p<0.05 compared with control.

Table 4.
Effect of AT, LAT, AT + LAT and LAT + AT Treatments on the Activity of c-Fos Protein in the Central Gray of Brain of Tibial and Sural Nerve Injury Rats
Group c-Fos protein(EA)
Nor 6.0 ± 0.4
Con 29.8 ± 2.3##
AT 24.0 ± 0.8
LAT 18.5 ± 0.5**
AT + LAT 19.8 ± 4.2
LAT + AT 14.5 ± 1.8**

Values are expressed mean ± SE.

A description of controls and experimental groups refer to Table 3.

## p<0.01 compared with normal.

** p<0.01 compared with control.

Table 5.
Effect of AT, LAT, AT + LAT and LAT + AT Treatments on the Bax Contents in Tibial and Sural Nerve Injury Rats
Group Bax(× 1,000 OD)
Nor 90.1± 1.3
Con 132.1 ± 1.6##
AT 127.8 ± 1.9
LAT 130.9 ± 1.8
AT + LAT 126.3 ± 2.7
LAT + AT 108.9 ± 1.7**

Values are expressed mean ± SE.

A description of controls and experimental groups refer to Table 3.

## p<0.01 compared with normal.

** p<0.01 compared with control.

Table 6.
Effect of AT, LAT, AT + LAT and LAT + AT Treatments on the Bcl-2 Contents in Tibial and Sural Nerve Injury Rats
Group Bcl-2(× 1,000 OD)
Nor 128.2 ± 2.8
Con 83.7 ± 7.2##
AT 114.1 ± 4.8*
LAT 111.7 ± 2.6*
AT + LAT 118.9 ± 2.4**
LAT + AT 109.2 ± 2.2*

Values are expressed mean ± SE.

A description of controls and experimental groups refer to Table 3.

## p<0.01 compared with normal.

* p<0.05,

** p<0.01 compared with control.

Table 7.
Effect of AT, LAT, AT + LAT and LAT + AT Treatments on the Bax/Bcl-2 Contents in Tibial and Sural Nerve Injury Rats
Group Bax/Bcl-2 ratio
Nor 0.70 ± 0.02
Con 1.60 ± 0.13##
AT 1.12 ± 0.04*
LAT 1.17 ± 0.04*
AT + LAT 1.06 ± 0.04*
LAT + AT 1.00 ± 0.03*

Values are expressed mean ± SE.

A description of controls and experimental groups refer to Table 3.

## p<0.01 compared with normal.

* p<0.05 compared with control.

Table 8.
Effect of AT, LAT, AT + LAT and LAT + AT Treatments on the mGluR5 Contents in Tibial and Sural Nerve Injury Rats
Group mGluR5(× 1,000 OD)
Nor 136.2 ± 2.4
Con 117.2 ± 1.6##
AT 120.6 ± 2.2
LAT 129.3 ± 2.3*
AT + LAT 131.3 ± 2.4*
LAT + AT 134.0 ± 3.3*

Values are expressed mean ± SE.

A description of controls and experimental groups refer to Table 3.

## p<0.01 compared with normal.

* p<0.05 compared with control.

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