Biomedical subjects

Bing Mao

Publications and source records attributed to Bing Mao.

10 recordsLinked to original sources

PubMed2007

[A randomized controlled trial of Yiqi Pingchuan Granule in treating acute attack of bronchial spasm due to asthma of qi deficiency and cold syndrome].

OBJECTIVE: To evaluate the safety and efficacy of Yiqi Pingchuan Granule in treating acute attack of asthma due to qi deficiency and cold syndrome. METHODS: A randomized controlled trial was conducted. A total of 80 patients with an acute attack of asthma were included. They were allocated into two groups randomly in a ratio of three to one. Sixty patients in the treatment group received Yiqi Pingchuan Granule and 20 patients in the control group received Ruyi Dingchuan Pill. Patients in both groups were treated for 7 days. RESULTS: There were no significant differences in traditional Chinese medicine syndrome, clinical symptoms and lung function between the two groups (P>0.05). After treatment, the forced expiratory volume in 1 second was increased in the treatment group (P<0.05), and the peak expiratory flow was accelerated in the control group (P<0.05). No significant side effects were noted in both groups. CONCLUSION: Yiqi Pingchuan Granule is safe and effective in treating acute attack of asthma due to qi deficiency and cold syndrome.

Adult↗

PubMed2006

Impurity profile tracking for active pharmaceutical ingredients: case reports.

Tracking the impurity profile of an active pharmaceutical ingredient (API) is a very important task for all stages of drug development. A systematic approach for tracking impurity profile of API is described. Various real pharmaceutical applications are presented through successful examples of impurity profile tracking for three different novel APIs. These include MK-0969, an M3 antagonist; MK-0677, an oral-active growth hormone secretagogue and API-A, a cathepsin K inhibitor. A general strategy including selection of a reversed phase high performance liquid chromatographic (RP-HPLC) impurity profile method based on screening various stationary phases and changing the pH of the mobile phase and elucidation of impurity structures through the utilization of LC-MS, preparative-LC and NMR is demonstrated. A series of studies were conducted on the peak purity check by using the LC-UV diode-array and LC-MS detections. The advantages and disadvantages of each technique in the evaluation of peak purity are discussed.

Cathepsin K↗

PubMed2006

Effective use of corticosteroids in treatment of plastic bronchitis with hemoptysis in Chinese adults.

AIM: To investigate whether corticosteroids are effective in the treatment of plastic bronchitis with hemoptysis. METHODS: A retrospective, clinical study was undertaken. Thirty two patients with only first episodes of plastic bronchitis with hemoptysis were divided into a steroid group (n=18) treated with glucocorticoids, and a non-steroid group (n=14). The supportive therapy was uniformly applied to both groups, except for glucocorticoids. Variables such as temperature and white blood cell counts were determined. Furthermore, the volume of hemoptysis and bronchial casts were evaluated in detail daily. RESULTS: There was no difference in the demographic data and variables at baseline between both groups (all P>0.05). On days 5, 6, 7 and 8, the volume of hemoptysis was significantly decreased in the steroid group compared with the non-steroid group (43+/-15 mL vs 117+/-33 mL on d 5, 29+/-12 mL vs 97+/-23 mL on d 6, 18+/-10 mL vs 80+/-20 mL on d 7, and 13+/-8 mL vs 66+/-14 mL on d 8; all P<0.05), and on d 10 after fibreoptic bronchoscopy, the cases with bronchial casts was reduced evidently in the steroid group in comparison with the non-steroid group (OR=5.69, 95% CI=1.76-43.6; P=0.005). There was no significance in mechanical ventilation and mortality between both groups. CONCLUSION: Despite some limitations of this study, it has been demonstrated that, on the basis of common supportive therapy, corticosteroids would be effective and safe for the treatment of plastic bronchitis with hemoptysis.

Adrenal Cortex Hormones↗

PubMed2005

Compound salvia pellet, a traditional Chinese medicine, for the treatment of chronic stable angina pectoris compared with nitrates: a meta-analysis.

BACKGROUND: Compound salvia pellet (CSP), consisting of active herbal ingredients extracted from Danshen (salvia miltiorrhiza), Sanqi (panax notoginseng), and Borneol (Cinnamomum camphora), is taken most frequently by patients with angina pectoris in China. To determine the efficacy and safety of CSP for the treatment of stable angina pectoris (SAP), a meta-analysis was undertaken. MATERIAL/METHODS: An extensive search including MEDLINE, EMBASE, BA, Chinese Biomedical Database (CBM), and Chinese Cochrane Centre Controlled Trials Register from 1994 to 2004 was performed. Data were extracted independently from the included trials by two reviewers. Statistical software (RevMan 4.1) provided by the Cochrane Collaboration was applied. RESULTS: Twenty-seven randomized controlled trials (RCTs) (n=3722), regardless of language or publication status, were identified. Generally, the methodological quality of the trials, assessed by the Jadad scale, was low, except for one with 3 points. Statistical pooling of the results showed that, compared with nitrates, CSP treatment had significant effect on the improvement of angina symptoms (RR=1.13, 95%CI=[1.07, 1.20]), showed greater increased effect on the improvement of electrocardiogram (ECG) results (RR=1.39, 95%CI=[1.28, 1.50]), and the percentage of patients with adverse events was significantly decreased in the treatment of CSP in comparison with nitrates (2.4% vs. 29.7%). CONCLUSIONS: CSP has significant effect on the improvement of angina symptoms and ECG results with few adverse events. However, the methodological quality of clinical trials with CSP for SAP needs to be improved, and the outcome measures should include mortality, quality of life, and other end-points.

Adult↗

PubMed2005

Relationship between bone mineral density and syndrome types described in traditional chinese medicine in chronic obstructive pulmonary disease: a preliminary clinical observation.

Osteoporosis is a common finding following chronic obstructive pulmonary disease (COPD), but there are few reports on the relationship between bone mineral density (BMD) and the syndrome types described in traditional Chinese medicine (TCM) in patients with COPD. A cross-sectional medical survey was used in this study. Twenty-six male patients with COPD and 26 age-matched male healthy subjects were recruited. The symptom questionnaire survey of TCM was implemented, and thereafter the COPD patients were divided into two subgroups: type of deficiency of the lung and spleen (TDLS) and type of deficiency of the lung, spleen and kidney (TDLSK). BMD of lumbar spine (L2-4), non-dominant femoral neck (Neck), Ward's triangle (Ward's), and great trochanter (Troch) were measured by dual-energy x-ray absorptiometry. In addition, the other bone turnover markers were also examined. The results showed that BMD was much more decreased in TDLSK than that in TDLS patients (p < 0.05), and BMD in the patients of the TDLS subgroup without symptoms of kidney-vacuity has showed the decreased trend from healthy subjects to TDLS patients. Furthermore, there was a higher incidence of osteoporosis in patients with TDLSK compared with that in TDLS (p < 0.05, OR > 2.0). Therefore, the data suggest that: (1) BMD might be a marker more sensitive than the symptom for the diagnosis of kidney-vacuity in COPD patients; (2) the deficiency of kidney would be the key factor of bone mineral loss; and (3) that invigorating the kidney should be performed in the phase of TDLS in COPD patients in advance.

Absorptiometry, Photon↗

PubMed2005

[Randomized controlled trial on haiguiyuyang capsule in the treatment of duodenal ulcer].

OBJECTIVE: To assess the efficacy and safety of haiguiyuyang capsule in the treatment of duodenal ulcer (also diagnosed as weiwan pain and hanrecuoza syndrome according to the theory of TCM). METHODS: This is a multi-center clinical trial cooperatively conducted from May 2003 to March 2004 in accordance to the principle of informed consent, to the criteria for subject inclusion, exclusion, discontinuation, and to the relevant guidelines for evaluating the therapeutic effects of new TCM drugs. The design of double-blind, double-dummy and randomized controlled trial was adopted. 438 patients were randomized to the Test group (n = 330, treated with haiguiyuyang capsule) and to the Control group (n = 108, treated with ranitidine). The therapeutic course for both groups was 6 weeks. RESULTS: Regarding the efficacy in treating duodenal ulcer, in the Test group, the Marked Efficacy Rate was 66.37% and the Total Efficacy Rate was 82.13%; in the Control group, the Marked Efficacy Rate was 68.61% and the Total Efficacy Rate was 93.34%; there was no significant difference between the two groups (P>0.05). Regarding the efficacy in treating the syndrome diagnosed by TCM, in the Test group, the Marked Efficacy Rate was 70.31% and the Total Efficacy Rate was 93.34%; in the control group, the rates were 71.29% and 91.66% respectively; there was no significant difference between the two groups (P>0.05). Besides, regarding the abatement of distention and fullness of stomach after treatment, the haiguiyuyang capsule was better than ranitidine (P<0.05). No adverse side-effect was observed. CONCLUSION: The efficacy of haiguiyuyang capsule in treating duodenal ulcer is similar to that of ranitidine. No obvious adverse effect of it was observed in this trial.

Adolescent↗

PubMed2003

Synthesis of 3-aminopyrazinone mediated by 2-pyridylthioimidate-ZnCl2 complexes. Development of an efficient route to a thrombin inhibitor.

A six-step preparation of thrombin inhibitor drug candidate 1 from pyrazinone 7 in 47% overall yield is described. The problem of low reactivity between weak amine nucleophile 4 and poor electrophile 3-bromopyrazinone 17 was overcome with the use of pyridinylthioimidate 27 in the presence of ZnCl(2) to afford adduct 3 in high yield. Several zinc complexes were characterized by solution and solid-state NMR and X-ray crystallographic analyses, and provided insight into the reaction mechanism. Preparation of pyridine N-oxide amine 4 was accomplished via a selective oxidation of the corresponding pyridinylamine 6. Pyridinylthioimidate 27 was prepared from pyrazinone 7 via a two-step one-pot process in near quantitative yield. Chlorination of the pyrazinone ring in 3 followed by hydrolysis and amide coupling completed the synthesis of 1. This chromatography-free synthesis was used successfully to prepare multikilogram quantities of the drug with reproducibility and high purity.

Antithrombins↗

PubMed2002

Examination of rofecoxib solution decomposition under alkaline and photolytic stress conditions.

Rofecoxib is a highly active and selective cyclo-oxygenase II inhibitor. A stability-indicating method for the assay of rofecoxib has been developed using reverse-phase high-performance liquid chromatography (HPLC). Stress testing of rofecoxib was conducted during the method development and validation. HPLC analysis of rofecoxib solutions stressed under alkaline and photolytic conditions revealed the presence of several degradates. Two main degradates were determined to be the cyclization product formed by photo-cyclization and the dicarboxylate formed by ring opening in the presence of base and oxygen. The identities of these degradates were confirmed by comparison of UV spectra and HPLC retention time with the independently synthesized products. The mechanistic pathways for the formation of these degradates are discussed. Further improvement of the HPLC method's ruggedness has been made based on these studies.

Alkalies↗

PubMed2002

Development of a nonchiral HPLC method with circular dichroism detection for chiral analysis of molybdenum-catalyzed enantioselective synthesis products.

The combination of a circular dichroism detector and nonchiral liquid chromatography was used for the chiral analysis of unresolved enantiomers to determine the enantioselectivity of a molybdenum-catalyzed asymmetric allylic alkylation reaction. The CD/UV peak area ratio of the unresolved enantiomers was calculated and compared with that of a reference standard to determine the enantiomeric purity. The limit of quantitation (LOQ) is 20 ng for the chiral ligand and 1 microg for the branched chiral product. The viability of the system depends on the limit of quantitation of the CD response and the linearity range of the CD and UV response.

Catalysis↗

PubMed2002

[Clinical observation on effect of kesuning granule in treating acute onset of chronic bronchitis].

OBJECTIVE: To prove the effect of Kesuning Granule (KSNG) in treating chronic bronchitis in exacerbation (Phlegm-Heat syndrome) and objectively evaluate its safety. METHODS: The double-blinded, double-dummy and randomized controlled method was adopted to observe 120 patients, who were divided into the treated group (n = 60, treated with KSNG 8 g, three times a day) and the control group (n = 60, treated with Jinbei Tankeqing Granule (JBTKQ) 7 g, three times a day). The therapeutic course for both groups was 6 days. RESULTS: In the treated group, the markedly effective rate was 58.33% and effective rate was 93.33%, while in the control group, they were 51.67% and 91.67% respectively, no significant difference was found between the two groups. For therapeutic effects on TCM syndromes, the markedly effective rate and effective rate in the treated group was 68.33% and 93.33% respectively and in the control group, 66.67% and 90.00% respectively, also showed insignificant difference. The effect initiative time was earlier in the treated group than that in the control group significantly (P < 0.05). No adverse effect was found in the observation. CONCLUSION: KSNG shows a definite clinical effect with no obvious toxic-adverse effects.

Adolescent↗