藏药赛北紫堇总生物碱镇痛药效学研究

本文采用小鼠热板法和醋酸扭体法观察藏药赛北紫堇总生物碱的镇痛作用;藏药赛北紫堇总生物碱灌胃给药,在小鼠热板法和扭体法实验中能提高小鼠热刺激引起的痛阈值(P＜0.05),显著减少醋酸所致的小鼠扭体反应(P＜0.05).结果表明藏药赛北紫堇总生物碱具有明显的镇痛作用.     

臭灵丹水提取物的急性毒性及镇痛作用的实验研究

采用上下移动法,醋酸扭体法、热板法、福尔马林致痛试验对臭灵丹水提取物的急性毒性及镇痛作用进行了研究。结果显示：臭灵丹水提取物LD50（腹腔注射）为1．19g／kg;臭灵丹水提取物明显抑制醋酸所致的小鼠扭体数,显著减少福尔马林致痛试验后期小鼠舔足行为;而对热板法所致疼痛无明显作用。表明臭灵丹水提取物具有一定的外周镇痛作用。     

复方庵摩勒颗粒剂镇痛抗炎作用的实验研究

目的观察复方庵摩勒颗粒剂镇痛抗炎作用,以促进临床应用。方法分别采用热板法、扭体法考察该药对小鼠镇痛作用,采用小鼠耳廓肿胀、小鼠足肿胀法考察该药对小鼠抗炎作用。结果比较空白组,热板和扭体实验中提取物组的镇痛作用明显,小鼠耳肿胀及足肿胀实验中提取物组抗炎作用明显,差异均有统计学意义(均P0.05);比较阳性组,提取物组的镇痛和抗炎作用无明显差异性(P0.05)。结论复方庵摩勒颗粒剂对实验小鼠具有明显的镇痛抗炎作用,为临床应用提供重要参考。     

蟾酥脂溶性提取物的分离分析及其镇痛、抗肿瘤作用研究

分析了中药蟾酥脂溶性提取物,研究其镇痛作用和对体外培养的T淋巴瘤细胞及Hela细胞生长的抑制作用。蟾酥的氯仿提取物用薄层层析定性,利用小鼠醋酸扭体法和热板法实验,判定药物镇痛作用的强弱。在倒置显微镜下,应用台盼兰染色法观察蟾酥氯仿提取物对T淋巴瘤细胞及Hela细胞的生长抑制作用。结果,与阴性对照相比,蟾酥氯仿提取物能显著降低小鼠扭体次数,显著提高小鼠热板痛阈值,明显抑制T淋巴瘤细胞及Hela细胞的生长,明显诱导T淋巴瘤细胞及Hela细胞的凋亡,凋亡率呈剂量和时间依赖性。     

蟾酥脂溶性提取物的分离分析及其镇痛、抗肿瘤作用研究

分析了中药蟾酥脂溶性提取物,研究其镇痛作用和对体外培养的T淋巴瘤细胞及Hela细胞生长的抑制作用。蟾酥的氯仿提取物用薄层层析定性,利用小鼠醋酸扭体法和热板法实验,判定药物镇痛作用的强弱。在倒置显微镜下,应用台盼兰染色法观察蟾酥氯仿提取物对T淋巴瘤细胞及Hela细胞的生长抑制作用。结果,与阴性对照相比,蟾酥氯仿提取物能显著降低小鼠扭体次数,显著提高小鼠热板痛阈值,明显抑制T淋巴瘤细胞及Hela细胞的生长,明显诱导T淋巴瘤细胞及Hela细胞的凋亡,凋亡率呈剂量和时间依赖性。     

乌金草挥发油镇痛作用的研究

采用热板法和醋酸扭体法两种经典的镇痛模型对乌金草挥发油进行了初步的镇痛作用研究。结果表明,乌金草挥发性成分具有显著的镇痛作用,能明显延长小鼠热板痛阈值,有效降低小鼠因醋酸所致扭体反应次数。在给药1mL/kg剂量和2mL/kg剂量时,该挥发油均具有明显的镇痛效果,且有一定的量效关系。     

藏药西藏棱子芹抗炎镇痛药效学研究

本文采用二甲苯致小鼠耳廓肿胀法、棉球致小鼠肉芽肿法观察藏药西藏棱子芹的抗炎作用,采用热板法、醋酸扭体法观察藏药西藏棱子芹的镇痛作用。结果表明藏药西藏棱子芹能明显抑制二甲苯所致小鼠耳廓肿胀和棉球所致小鼠肉芽肿;能提高小鼠对热板疼痛的阈值,减少小鼠扭体反应的次数,延长醋酸所致小鼠扭体反应的潜伏时间。藏药西藏棱子芹具有显著的抗炎镇痛作用,值得开发研究。     

姜延胶囊抗炎镇痛作用实验研究

目的:观察姜延胶囊的抗炎镇痛作用.方法:采用醋酸致小鼠腹腔毛细管通透法、二甲苯致小鼠耳廓肿胀法、滤纸性肉芽肿法及小鼠热板法、扭体法镇痛实验等动物模型,考察姜延胶囊的抗炎镇痛效果.结果:姜延胶囊能明显减轻小鼠腹腔毛细血管通透性,对小鼠耳肿胀及肉芽肿均有抑制作用;并能减少热板及醋酸所致的小鼠疼痛反应,提高小鼠痛阈值.结论:姜延胶囊具有良好的抗炎镇痛作用,该实验为其临床应用提供了药理学依据.     

龙胆苦苷镇痛抗炎药理作用研究

本文采用小鼠醋酸扭体法和热板法观察龙胆苦苷(gentiopicroside)的镇痛药理作用,采用二甲苯致小鼠耳廓肿胀、蛋清致大鼠足跖肿胀急性炎症模型及大鼠肉芽肿慢性炎症模型,考察龙胆苦苷的抗炎药理作用.龙胆苦苷经皮下注射给药,在小鼠醋酸扭体和热板法实验中,减少了扭体次数,提高了小鼠痛域阈值,呈良好的量效关系.明显减轻了二甲苯致小鼠耳廓肿胀,降低蛋清致大鼠足趾肿胀,抑制了大鼠肉芽肿.结果表明龙胆苦苷对热和化学刺激引起的疼痛反应有明显的镇痛作用,对急、慢性炎症反应均有一定的抑制作用.     

骆驼刺氯仿提取物镇痛抗炎作用的初步研究

目的:初步考察骆驼刺氯仿提取物的镇痛抗炎活性.方法:以热板模型、醋酸扭体模型和福尔马林模型,考察骆驼刺氯仿提取物ASE的镇痛作用;以二甲苯制备小鼠耳肿胀模型,考察ASE的抗炎作用.结果:热板试验中,ASE中、高(0.50、1.00 g·kg-1)剂量对热刺激引发的疼痛具有抑制作用;醋酸扭体试验中,ASE低、中、高(0....     

活络效灵丹抗炎镇痛作用的实验研究

目的：研究活络效灵丹的抗炎、镇痛、消肿等药理作用,为该药的临床研究提供基础。方法：用二甲苯致小鼠耳肿胀法和角又莱胶致大鼠足肿胀法研究抗炎作用,用热板法和扭体法研究镇痛作用。结果：活络效灵丹能较好地抑制二甲苯引起的小鼠耳廓炎性肿胀和大鼠甲醛致足跖肿胀,能显著提高热板试验小鼠的痛阈,有效抑制冰醋酸引起的小鼠扭体反应次数。结论：活络效灵丹具有良好的抗炎、镇痛、消肿等作用。     

Studies on the analgesic activities of Jia-Yuan-Qing pill and its safety evaluation in mice

The analgesic activity of Porcellio laevis Latreille, Rhizoma Corydalis, and Radix Cynanchi Paniculati have been reported in recent years. A new formula named Jia-Yuan-Qing pill (JYQP) is therefore created by combining the three herbs at 9:7:7 ratio according to traditional Chinese theories. The present study aims to evaluate the effect of JYQP as a novel painkiller in various models. Acute toxicity test was applied to evaluate the safety of JYQP. Acetic-acid-induced writhing, hot plate test, formalin test, and naloxone-pretreated writhing test were employed to elaborate the analgesic activity of JYQP and its possible mechanism. A bone cancer pain mouse model was performed to further assess the effect of JYQP in relieving cancer pain. Test on naloxone-precipitated withdrawal symptoms was conduct to examine the physical dependence of mice on JYQP. Data revealed that JYQP reduced writhing and stretching induced by acetic acid; however, this effect could not be blocked by naloxone. JYQP specifically suppressed the phase II reaction time in formalin-treated mice; meanwhile, no analgesic effect of JYQP in hot plate test was observed, indicating that JYQP exerts analgesic activity against inflammatory pain rather than neurogenic pain. Furthermore, JYQP could successfully relieve bone cancer pain in mice. No physical dependence could be observed upon long-term administration in mice. Collectively, our present results provide experimental evidence in supporting clinical use of JYQP as an effective and safe agent for pain treatment.     

Antinociceptive activity of methanolic extract of leaves of Achyranthes aspera Linn. (Amaranthaceae) in animal models of nociception

Antinociceptive activity of methanolic extract of leaves of A. aspera was studied by peripheral/non-narcotic model of nociception like acetic acid induced writhing syndrome test and central/narcotic models like hot plate and tail flick tests. The methanolic extract of the plant, administered orally (@ 300, 600 and 900 mg/kg, body weight) and the standard drug (piroxicam; 10 mg/kg body weight, po) produced significant analgesic activity in acetic acid induced writhing syndrome as compared to the vehicle treated control group. In the hot plate analgesic test, in A. aspera at the above doses and the standard drug treated group (morphine sulphate @ 1.5 mg/kg, ip), the duration of reaction time (sec) increased dose dependently and significantly compared to the control group. In the tail flick test, the plant extract produced dose dependant increase in reaction time which was significantly higher in the test and standard group compared to the control group. The plant possesses significant antinociceptive property as evidenced in all the animal models of nociception. It might possibly exert its effect through diverse mechanism that may involve both central and peripheral pathways. The preliminary phytochemical investigation revealed the presence of steroids, alkaloids and triterpene in the methanolic extract of leaves of A. aspera which may be responsible for its antinociceptive activity.     

延胡索乙素与白芷总香豆素、总挥发油配伍药效学比较研究

目的：评价延胡索乙素、白芷总香豆素及总挥发油配伍的药效学比较研究。方法：小鼠醋酸扭体法、热板镇痛法、甩尾法三种模型比较元胡止痛片（A组）、延胡索乙素（B组）、白芷总香豆素（C组）、白芷总挥发油（D组）、延胡索乙素与白芷总香豆素配伍（E组）、延胡索乙素与白芷总挥发油配伍（F组）及延胡索乙素与白芷总香豆素、白芷总挥发油配伍（G组）后的镇痛作用。结果：A、G组镇痛效果最佳,B、E、F组具显著的镇痛作用,C、D组与模型组相比,有一定的镇痛作用,但较弱。结论：延胡索乙素与白芷总香豆素、总挥发油配伍使用,具有显著的镇痛作用,类似于元胡止痛片中元胡白芷的配伍作用,但成分更为明确,标准可控,使用量小,属于分子中药组方范畴。元胡的主要有效成分延胡索乙素与白芷的主要成分白芷总香豆素、总挥发油均具有镇痛作用,符合中药元胡及白芷的功效,本实验采用药物有效成分进行配伍,成分明确,结果可控。     

Analgesic effect of metoclopramide and its mechanism

Metoclopramide produced a significant analgesic effect when tested by both acetic acid induced writhing and hot plate test. This effect was reduced by naloxone suggesting opioid involvement. Further, bromocriptine which inhibits the release of PRL attenuated the effect of metoclopramide indicating that this drug could act by releasing PRL. The unaltered analgesic effect of metoclopramide by yohimbine reveals that alpha-2 adrenoceptors may not be involved in this action.     

Antinociceptive action of GABA-mimetic agent--N-phthaloyl GABA

N-phthaloyl GABA (P-GABA), a nonselective GABA-ergic drug, showed positive analgesic response in four different models in mice, viz-tail immersion, tail clip, hot plate and writhing-induced by acetic acid. Antinociceptive ED50 (ip in mice) of P-GABA was lowest in tail immersion method (ED50 = 24.27, mg/kg). Though pethidine (10 mg/kg, ip) significantly potentiated the antinociceptive action of P-GABA (20 mg/kg, ip), pretreatment of naloxone (5 mg/kg, im) did not influence the same. Pretreatment with atropine (10 mg/kg, im), picrotoxin (0.08 mg/kg) and 3-mercaptopropionic acid (2 mg/kg) reduced the antinociceptive action of P-GABA significantly. But pretreatment with bicuculline (0.4 mg/kg), a specific GABA antagonist, did not reduce the antinociceptive action of P-GABA.     

油樟叶挥发油的镇痛活性研究

采用水蒸汽蒸馏法提取四川宜宾产油樟叶中挥发油,气相色谱-质谱联用仪鉴定油樟叶挥发油的主要化学成分,然后根据电热板和醋酸扭体实验研究不同剂量的油樟叶挥发油对小鼠疼痛阈值的影响。GC-MS结果显示,油樟叶挥发油主要含1,8-桉叶油素、α-萜品醇和香桧烯等26个主要化学成分,其中1,8-桉叶油素含量占58.55%。油樟叶挥发油中、低剂量组可延长小鼠对热致痛的痛阈时间,高、中剂量组可显著减少小鼠醋酸致痛扭体次数,镇痛百分率分别为74.69%和73.11%,与对照组呈极显著差异。