전기침이 결박 스트레스 반응에 미치는 영향 : 억제성 회피 과제, 강제 수영 시험, 스트레스 호르몬 반응 연구 Effects of Electroacupuncture on Immobilization Stress Responses : A Study on Inhibitory Avoidance Task, Forced Swimming Test, and Stress Hormones원문보기
목적 : 본 연구는 결박 스트레스를 시행한 백서의 기억력, 우울, 스트레스 호르몬의 혈중 농도에 대한 전기침의 효과를 관찰하였다. 재료와 방법 : 결박 그룹은 10일 동안 2시간의 결박 스트레스를 받았다. 결박 스트레스 및 고주파수 전침 그룹은 2시간의 결박 스트레스를 받는 동시에 100Hz의 전침을 우측 족삼리 (ST-36)에 시행하였다. 기억력과 우울에 미치는 결박 스트레스와 침의 효과를 비교하기 위하여 억제성 회피 과제와 강제 수영 검사를 실시하였다. 결박 스트레스 및 전기침으로 유도된 코르티코스테론과 멜라토닌, 부신피질자극호르몬, 노르아드레날린의 농도를 측정하기 위하여 결박 스트레스 및 전기침 자극이 시작된 30분, 60분, 90분, 120분 후에 백서의 꼬리에서 혈액 샘플을 채취하였다. 결과 : 억제성 회피 과제에서 전기침을 시행한 그룹은 시행하지 않은 그룹에 대해서 장기 기억의 증진에 유의한 변화가 있었다. 강제 수영 검사 결과에서는 우울에 유의한 변화가 없었으며, 스트레스 호르몬 반응 결과에서도 유의한 변화가 없었다. 결론 : 1. 고주파수 전기침 (100Hz)은 억제성 회피 과제 결과 결박 스트레스에 기억력을 상승시켰다. 2. 고주파수 전기침 (100Hz)은 강제 수영 시험 결과 결박 스트레스로 유도된 우울을 감소시키지 않았다. 3. 고주파수 전기침 (100Hz)은 혈액 채취 결과 스트레스 호르몬을 감소시키지 않았다.
목적 : 본 연구는 결박 스트레스를 시행한 백서의 기억력, 우울, 스트레스 호르몬의 혈중 농도에 대한 전기침의 효과를 관찰하였다. 재료와 방법 : 결박 그룹은 10일 동안 2시간의 결박 스트레스를 받았다. 결박 스트레스 및 고주파수 전침 그룹은 2시간의 결박 스트레스를 받는 동시에 100Hz의 전침을 우측 족삼리 (ST-36)에 시행하였다. 기억력과 우울에 미치는 결박 스트레스와 침의 효과를 비교하기 위하여 억제성 회피 과제와 강제 수영 검사를 실시하였다. 결박 스트레스 및 전기침으로 유도된 코르티코스테론과 멜라토닌, 부신피질자극호르몬, 노르아드레날린의 농도를 측정하기 위하여 결박 스트레스 및 전기침 자극이 시작된 30분, 60분, 90분, 120분 후에 백서의 꼬리에서 혈액 샘플을 채취하였다. 결과 : 억제성 회피 과제에서 전기침을 시행한 그룹은 시행하지 않은 그룹에 대해서 장기 기억의 증진에 유의한 변화가 있었다. 강제 수영 검사 결과에서는 우울에 유의한 변화가 없었으며, 스트레스 호르몬 반응 결과에서도 유의한 변화가 없었다. 결론 : 1. 고주파수 전기침 (100Hz)은 억제성 회피 과제 결과 결박 스트레스에 기억력을 상승시켰다. 2. 고주파수 전기침 (100Hz)은 강제 수영 시험 결과 결박 스트레스로 유도된 우울을 감소시키지 않았다. 3. 고주파수 전기침 (100Hz)은 혈액 채취 결과 스트레스 호르몬을 감소시키지 않았다.
Objectives : This study investigated the effects of electroacupuncture on memory, depression, and plasma stress hormone levels in rats that were under immobilization stress. Materials and Methods : The immobilization-only group was given two hours of immobilization stress for 10 consecutive days. Th...
Objectives : This study investigated the effects of electroacupuncture on memory, depression, and plasma stress hormone levels in rats that were under immobilization stress. Materials and Methods : The immobilization-only group was given two hours of immobilization stress for 10 consecutive days. The immobilization and high frequency EA group was given two hours of immobilization stress simultaneously with high frequency (100Hz) electroacupuncture stimulation on the right ST-36 (Zusanli) for 10 consecutive days. We conducted the inhibitory avoidance and forced swimming tests to recognize whether immobilization stress and electroacupuncture have effects on memory and depression. We collected blood samples from the tail of each rat at 30, 60, 90, and 120-minute intervals during the immobilization stress and EA stimulation to measure plasma concentrations of ACTH, corticosterone, melatonin, and norepinephrine induced by immobilization stress and electroacupuncture. Results : There was a significant effect of high frequency on the increase in anamnesis based on the result of the inhibitory avoidance test, but there was no significant effect of decreasing depression based on the result of the forced swim test. Also, there was no significant effect on the response indicated by stress hormones. Conclusions : 1. High frequency electroacupuncture (100Hz) improved anamnesis in immobilization stress states under the inhibitory avoidance task. 2. High frequency electroacupuncture (100Hz) did not reduce depression induced by immobilization stress under the forced swimming test. 3. High frequency electroacupuncture (100Hz) did not decrease stress hormones through blood sampling.
Objectives : This study investigated the effects of electroacupuncture on memory, depression, and plasma stress hormone levels in rats that were under immobilization stress. Materials and Methods : The immobilization-only group was given two hours of immobilization stress for 10 consecutive days. The immobilization and high frequency EA group was given two hours of immobilization stress simultaneously with high frequency (100Hz) electroacupuncture stimulation on the right ST-36 (Zusanli) for 10 consecutive days. We conducted the inhibitory avoidance and forced swimming tests to recognize whether immobilization stress and electroacupuncture have effects on memory and depression. We collected blood samples from the tail of each rat at 30, 60, 90, and 120-minute intervals during the immobilization stress and EA stimulation to measure plasma concentrations of ACTH, corticosterone, melatonin, and norepinephrine induced by immobilization stress and electroacupuncture. Results : There was a significant effect of high frequency on the increase in anamnesis based on the result of the inhibitory avoidance test, but there was no significant effect of decreasing depression based on the result of the forced swim test. Also, there was no significant effect on the response indicated by stress hormones. Conclusions : 1. High frequency electroacupuncture (100Hz) improved anamnesis in immobilization stress states under the inhibitory avoidance task. 2. High frequency electroacupuncture (100Hz) did not reduce depression induced by immobilization stress under the forced swimming test. 3. High frequency electroacupuncture (100Hz) did not decrease stress hormones through blood sampling.
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문제 정의
The main aim of this study was to look into electroacupuncture (EA) effects on chronic immobilization stress for memory, depression and stress hormone responses.
가설 설정
3. High frequency electroacupuncture (100Hz) had not decrease stress hormones through blood sampling.
제안 방법
Immobilization stress was carried out for 10 days between 09:00 AM and noon. All the experiments were completed between 09:00 and noon to minimize variability due to circadian rhythm.
Animals were housed in groups of five in a vivarium with 12-hr light/dark cycle (lights on at 7:00), 50–60% humidity, and free access to food and water.
After forced swimming testing, the rats were towel-dried. Each record of 15 min pretest and 5 min test session of FST was analyzed to score behaviors: struggling, swimming, and immobility.
The control group did not receive treatment; 5 rats under immobilization (immo) group underwent immobilization stress for 2 hours for 10 days; 5 rats under immobilization +1day acupuncture (immo+1ACU) group underwent immobilization stress for 2 hours for 10 days and EA on the last day; 5 rats under immobilization +10days acupuncture (immo+10ACU) group underwent immobilization stress for 2 hours for 10 days and EA for 10 days as well. Immo +1ACU group and immo +10ACU group were given 2 hours immobilization stress simultaneously with high frequency (100Hz) EA stimulation each day for 10 days. The immobilization stress was given by attaching the four limbs of each animal in a prone position to a wooden board with adhesive tape.
We measured the ACTH, corticosterone, melatonin, and noradrenaline levels in separate groups of rats that were given immobilization stress and EA procedure as described above. To determine the plasma concentrations of stress hormones in detail, blood samples were taken from the tail of each rat at 30, 60, 90, and 120 min intervals during immobilization stress and EA stimulation.
To investigate the effect of EA on corticosterone, melatonin, ACTH, and noradrenaline response caused by chronic immobilization stress, we measured the plasma ACTH, corticosterone, melatonin, and noradrenaline concentration at 30, 60, 90, and 120 min after the beginning of the immobilization stress and high frequency (100Hz) electroacupuncture stimulation on Zusanli acupuncture point.
To investigate the effect of EA on memory and depression caused by chronic immobilization stress, the inhibitory avoidance task and forced swimming test were carried out after the immobilization stress and high frequency (100Hz) EA stimulation. After the last acquisition trial (24 hrs), the latency until stepping through toward the dark side was recorded in the absence of an electrical shock (retention trial) and was taken as a measure of long-term memory9.
대상 데이터
Healthy adult male Sprague-Dawley rats weighing 320-330 g were utilized. All procedures were performed in accordance with the National Institute of Health Guidelines for Animal Research (Guide for the Care and Use of Laboratory Animals) and approved by the Institutional Animal Care and Use Committee at Wonkwang University.
데이터처리
The effects of immobilization, high frequency EA on inhibitory avoidance test, and FST were analyzed using repeated analyses of variance (ANOVA) followed by Dundan's post-hoc.
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