Ginkgo Biloba May Ease Chronic Pain
Posted: Tue Jun 23, 2009 4:16 am
http://altmedicine.about.com/b/2009/06/ ... c-pain.htm
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Ginkgo Biloba May Ease Chronic Pain
Monday June 22, 2009
Ginkgo biloba extract —long used in traditional Chinese medicine to fight Alzheimer's disease, macular degeneration, and age-related memory loss—may help ease neuropathic pain, a new study shows. In tests on rats with neuropathic pain, researchers found that pain responses were significantly lower among animals that had been treated with ginkgo. Results revealed that the higher the dose of ginkgo extract, the greater the pain-relieving benefits.
Common among people with diabetes, shingles, and limb injury, neuropathic pain is typically accompanied by tissue damage. Symptoms of this chronic condition include sharp, burning pain and tingling, especially in response to usually harmless stimuli (such as heat and cold). Past research suggests that capsaicin cream (formulated from a chili-pepper extract) may also help alleviate neuropathic pain.
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actual study abstract
http://www.anesthesia-analgesia.org/cgi ... 108/6/1958
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The Effects of Ginkgo Biloba Extract EGb 761 on Mechanical and Cold Allodynia in a Rat Model of Neuropathic Pain
Yee Suk Kim, MD, Hue Jung Park, MD, Tae Kwan Kim, MD, Dong Eon Moon, MD, FIPP, and Hae Jin Lee, MD
From the Department of Anesthesiology and Pain Medicine, School of Medicine, The Catholic University of Korea, Seoul, Korea.
Address correspondence and reprint requests to Hae Jin Lee, MD, Department of Anesthesiology and Pain Medicine, St. Mary’s Hospital, #62 Youido-dong, Yongdeungpo-gu, Seoul, 150-713, Korea. Address e-mail to lehaji@catholic.ac.kr.
Abstract
BACKGROUND: Neuropathic pain is chronic pain that is caused by an injury to the peripheral or central nervous system. The symptoms of neuropathic pain are continuing pain, hyperalgesia, and allodynia. Ginkgo biloba extract is an oriental herbal medicine that has various pharmacological actions. We examined the effect of Ginkgo biloba extract, EGb 761, on the mechanical and cold allodynia in a rat model of neuropathic pain.
METHODS: Male Sprague-Dawley rats were prepared by tightly ligating the left L5 and L6 spinal nerves. All the rats developed mechanical and cold allodynia 7 days after surgery. Fifty neuropathic rats were assigned into five groups for the intraperitoneal administration of drugs. The study was double-blind and the order of the treatments was randomized. Normal saline and EGb 761 (50, 100, 150, and 200 mg/kg) were administered, respectively, to the individual groups. We examined mechanical and cold allodynia at preadministration and at 15, 30, 60, 90, 120, 150, and 180 min after intraperitoneal drug administration. Mechanical allodynia was quantified by measuring the paw withdrawal threshold to stimuli with von Frey filaments of 1.0, 1.4, 2.0, 4.0, 6.0, 8.0, 10.0, 12.0, 15.0, and 26.0 g. Cold allodynia was quantified by measuring the frequency of foot lift with applying 100% acetone. We measured the locomotor function of the neuropathic rats by using the rotarod test to reveal if EGb 761 has side effects, such as sedation or reduced motor coordination.
RESULTS: The control group showed no differences for mechanical and cold allodynia. For the EGb 761 groups, the paw withdrawal thresholds to mechanical stimuli and withdrawal frequencies to cold stimuli were significantly reduced versus the preadministration values and versus the control group. The duration of antiallodynic effects increased in a dose-dependent fashion, and these were maintained for 120 min at the highest dose (P < 0.05). Only at the highest dose (200 mg/kg) did EGb 761 reduce the rotarod performance time.
CONCLUSION: We conclude that Ginkgo biloba extract, EGb 761, attenuates mechanical and cold allodynia in a rat model of neuropathic pain, and it may be useful for the management of neuropathic pain.
=======================================================
Ginkgo Biloba May Ease Chronic Pain
Monday June 22, 2009
Ginkgo biloba extract —long used in traditional Chinese medicine to fight Alzheimer's disease, macular degeneration, and age-related memory loss—may help ease neuropathic pain, a new study shows. In tests on rats with neuropathic pain, researchers found that pain responses were significantly lower among animals that had been treated with ginkgo. Results revealed that the higher the dose of ginkgo extract, the greater the pain-relieving benefits.
Common among people with diabetes, shingles, and limb injury, neuropathic pain is typically accompanied by tissue damage. Symptoms of this chronic condition include sharp, burning pain and tingling, especially in response to usually harmless stimuli (such as heat and cold). Past research suggests that capsaicin cream (formulated from a chili-pepper extract) may also help alleviate neuropathic pain.
==================================================
actual study abstract
http://www.anesthesia-analgesia.org/cgi ... 108/6/1958
==================================================
The Effects of Ginkgo Biloba Extract EGb 761 on Mechanical and Cold Allodynia in a Rat Model of Neuropathic Pain
Yee Suk Kim, MD, Hue Jung Park, MD, Tae Kwan Kim, MD, Dong Eon Moon, MD, FIPP, and Hae Jin Lee, MD
From the Department of Anesthesiology and Pain Medicine, School of Medicine, The Catholic University of Korea, Seoul, Korea.
Address correspondence and reprint requests to Hae Jin Lee, MD, Department of Anesthesiology and Pain Medicine, St. Mary’s Hospital, #62 Youido-dong, Yongdeungpo-gu, Seoul, 150-713, Korea. Address e-mail to lehaji@catholic.ac.kr.
Abstract
BACKGROUND: Neuropathic pain is chronic pain that is caused by an injury to the peripheral or central nervous system. The symptoms of neuropathic pain are continuing pain, hyperalgesia, and allodynia. Ginkgo biloba extract is an oriental herbal medicine that has various pharmacological actions. We examined the effect of Ginkgo biloba extract, EGb 761, on the mechanical and cold allodynia in a rat model of neuropathic pain.
METHODS: Male Sprague-Dawley rats were prepared by tightly ligating the left L5 and L6 spinal nerves. All the rats developed mechanical and cold allodynia 7 days after surgery. Fifty neuropathic rats were assigned into five groups for the intraperitoneal administration of drugs. The study was double-blind and the order of the treatments was randomized. Normal saline and EGb 761 (50, 100, 150, and 200 mg/kg) were administered, respectively, to the individual groups. We examined mechanical and cold allodynia at preadministration and at 15, 30, 60, 90, 120, 150, and 180 min after intraperitoneal drug administration. Mechanical allodynia was quantified by measuring the paw withdrawal threshold to stimuli with von Frey filaments of 1.0, 1.4, 2.0, 4.0, 6.0, 8.0, 10.0, 12.0, 15.0, and 26.0 g. Cold allodynia was quantified by measuring the frequency of foot lift with applying 100% acetone. We measured the locomotor function of the neuropathic rats by using the rotarod test to reveal if EGb 761 has side effects, such as sedation or reduced motor coordination.
RESULTS: The control group showed no differences for mechanical and cold allodynia. For the EGb 761 groups, the paw withdrawal thresholds to mechanical stimuli and withdrawal frequencies to cold stimuli were significantly reduced versus the preadministration values and versus the control group. The duration of antiallodynic effects increased in a dose-dependent fashion, and these were maintained for 120 min at the highest dose (P < 0.05). Only at the highest dose (200 mg/kg) did EGb 761 reduce the rotarod performance time.
CONCLUSION: We conclude that Ginkgo biloba extract, EGb 761, attenuates mechanical and cold allodynia in a rat model of neuropathic pain, and it may be useful for the management of neuropathic pain.