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OBJECTIVE： To establish the fingerprint of Mahai zhitan capsule， to determine the contents of main components， and to provide scientific basis for the stability and quality control of the preparation technology. METHODS： The determination was performed on Inertsil ODS-3 column with acetonitrile-0.1％ phosphoric acid as mobile phase （gradient elution） at the flow rate of 1.0 mL/min. The detection wavelength was set at 250 nm （0-23 min and 31-120 min） and 230 nm （23-31 min）. The column temperature was set at 30 ℃. HPLC fingerprint for 10 batches of Mahai zhitan capsule was established by using “similarity evaluation software for chromatographic fingerprint of traditional chinese medicine” （2012 edition） and the similarity was evaluated. The chromatographic peaks were assigned and identified with reference substance， negative samples without ingredient and substance control respectively， and the identified main components were quantitatively analyzed. RESULTS： The similarity of 10 batches of sample was more than 0.99； 20 common peaks were found， and 10 common peaks were identified. Among them， No. 1，13，14，15，16，17，18，19，20 chromatographic peaks originated from Rheum palmatum； No. 3，4，6，7 chromatographic peaks originated from processed Strychnos nuxvomica； No. 8 chromatographic peaks originated from Angelica sinensis； the corresponding source of medicinal materials was not found in No. 2，5，9，10，11，12 chromatographic peaks. By comparing the reference substances， No. 1，4，6，7，8，16，17，18，19 and 20 chromatographic peaks were identified as gallic acid， loganin acid， strychnine， brucine， ferulic acid， aloe-emodin， rhein， emodin， chrysophanol and emodin methyl ether， respectively. In the determination of identified five main components （loganin， strychnine， brucine， emodin and chrysophanol）， the methodological investigation met the relevant standards. In 10 batches of samples， the contents of loganin， strychnine， brucine， emodin and chrysophanol were 2.477 1-2.785 9， 1.746 1-1.946 0， 1.374 6-1.505 8， 1.573 2-1.824 1 and 0.232 1-0.261 7 mg/g， respectively. CONCLUSIONS： The established method is reliable， accurate， stable and simple， which could provide reference for the preparation technology and quality control of Mahai zhitan capsule.
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ObjectiveTo explore the therapeutic effect and mechanism of dexamethasone combined with puerarin for treatment of paraquat (PQ) poisoned rats.Methods Thirty Sprague Dawley (SD) rats were divided by random number table into 5 groups: control, model, dexamethasone, puerarin and combined groups, 6 rats in each group. The PQ poisoned rat model was established by intraperitoneal injection of PQ 25 mg/kg (1 mL), while in the rat of the control group, the same volume of normal saline was injected intraperitoneally. After 2 hours, in the rat of dexamethasone group, 20 mg/kg dexamethasone in 1.5 mL was injected intraperitoneally, and in the rat of puerarin group, 100 mg/kg puerarin in 1.5 mL was injected intraperitoneally. In the rat of combined group, 20 mg/kg dexamethasone combined with 100 mg/kg puerarin in a total amount of 1.5 mL was injected intraperitoneally. In the control group and model group, 1.5 mL of normal saline was injected intraperitoneally. The above mentioned treatments were repeated once more 26 hours later. In 26-50 hours after modeling, urine was collected, and urine N-acetyl-beta-D-amino glycosidase enzymes (NAG) was tested; at the 50th, abdominal aortic blood was collected to test oxygen partial pressure (PaO2). The lung index, kidney index, and the levels of malonaldehyde (MDA), superoxide dismutase (SOD) and myeloperoxidase (MPO) were measured in the left lung and kidney tissue homogenates separately; the right lung and kidney were harvested to observe pathological changes under light microscope. Another 30 SD rats were treated the same as above measures but no sacrifice to observe 30-day survival rate in each group.Results The lung index, kidney index, NAG in urine, MDA and MPO levels in lung and kidney tissue homogenates in model group were significantly higher than those in the control group [lung index: 9.80±1.83 vs. 4.97±1.14, kidney index: 9.40±1.32 vs. 7.01±0.32, NAG (U·kg-1·day-1): 1.93±0.18 vs. 0.41±0.03, MDA of lung (nmol/mg): 1.04±0.15 vs. 0.28±0.10, MDA of kidney (nmol/mg): 1.39±0.16 vs. 0.66±0.13, MPO of lung (U/g): 1.14±0.08 vs. 0.81±0.06, MPO of kidney (U/g): 0.88±0.08 vs. 0.52±0.12]; while PaO2 [mmHg (1 mmHg = 0.133 kPa): 59.83±4.40 vs. 97.00±2.83] and SOD (U/mg): lung was 27.38±3.48 vs. 86.88±5.88; kidney was 24.18±3.74 vs. 57.86±6.14) were obviously lower than those in control group (allP 0.05).Conclusions Dexamethasone can improve the prognosis of rats with acute paraquat intoxication, it can provide lung protection markedly, but cannot provide significant protective effect on kidney; puerarin has therapeutic effect on rats with acute PQ poisoning, it can provide not only lung protection but also kidney protection. The effect of treatment with dexamethasone combined with puerarin is not superior to that by using dexamethasone or puerarin alone.
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Objective To investigate the clinical efficacy and safety of escitalopram in the treatment of chronic subjec-tive dizziness ( CSD) . Methods A total of 90 CSD patients randomly divided into medication group ( n=32) ,vestibular reha-bilitation group (n=27) and psychological intervention group (n=31).Patients in the medication group treated with escitalopram (10-20 mg?d-1,PO),those in the vestibular rehabilitation group were underwent vestibular rehabilitation training and those in the psychological intervention group were given cognitive behavioral therapy. The treatment course lasted six weeks. All patients were evaluated by zDHI,HAMA and HAMD before and after the treatments. Results The total scores of HAMA,HAMD,DHI and the respective factor scores of DHI were significantly decreased in each group after 6-week treatment when compared with those before the treatment (P0.05),re-spectively.They were significantly lower in the two groups than in vestibular rehabilitation group [ (14.69±4.76),(14.96±4.77) and (14.88±4.65) for the emotional factor score,HAMA score and HAMD score,respectively,P<0.05 for all]. Conclusion Escitalopram can improve the symptoms of CSD involving the body,emotion and function.The vestibular rehabilitation training and cognitive behavioral therapy have their respective advantages.
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OBJECTIVE@#To analyze the clinical significance of ocular vestibular evoked myogenic potentials (oVEMP) and cervical vestibular evoked myogenic potentials (cVEMP) in primary unilateral benign paroxysmal positional vertigo (BPPV).@*METHOD@#Fifty-two patients with unilateral primary BPPV (BPPV group) and 38 normal subjects (control group) received ocular vestibular evoked myogenic potential (oVEMP) and cervical vestibular evoked myogenic potential (cVEMP) test using tone burst stimuli. The response rate, latency and amplitude were analyzed.@*RESULT@#In BPPV group, the response rate of oVEMP was 46.15% in lesioned side and 48.08% in healthy side, respectively. The response rate of cVEMP was 67.31% in lesioned side and 65.38% in healthy side, respectively. In control group, the response rate on the left ear was 84.21% for oVEMP and 92.11% for cVEMP. On the right ear, was 81.58% for oVEMP and 94.74% for cVEMP in control group, there was no significant difference in cVEMP and oVEMP P1, N1 N1-P1 latency and amplitude between left and right ear. The interaural amplitude ratio and asymmetry of cVEMP and oVEMP was significantly different between BPPV group and control group (P<0.05).@*CONCLUSION@#Unilateral primary BPPV with bilateral impaired vestibular otolith pathways function can be objectively evaluated by oVEMP and cVEMP detection. Abnormal oVEMP responses were more frequently detected than cVEMP.