In vivo Pharmacokinetic Analysis of Shenbai Nanosuspension in Rats Based on Overall Composition of Chinese Materia Medica / 中国实验方剂学杂志

ObjectiveTo clarify the scientific validity of in vivo pharmacokinetic determination of the whole drug composition in Shenbai nanosuspension in rats， and to provide methodological guidance and theoretical basis for the in vivo study of multi-component complex system of traditional Chinese medicine（TCM） preparations. MethodThe concentration of the overall components， mainly total saponins and total polysaccharides in Shenbai decoction and Shenbai nanosuspension， was determined in rat plasma at different times by area under the absorbance-wavelength curve method（AUAWC）， and the concentration of individual ginsenoside Rg1 was determined by high performance liquid chromatography（HPLC）， and the methodology was verified. The pharmacokinetic parameters of the whole component were compared with those of ginsenoside Rg1 to evaluate the in vivo operational characteristics of the two preparations. ResultThe methodological investigations of AUAWC and HPLC were in accordance with the requirements. AUAWC analysis showed that the overall components in both the decoction group and the nanosuspension group showed a one-compartment model， with half-life（t1/2） of 2.43 h and 2.04 h， respectively. The relative bioavailability of Shenbai nanosuspension was 138.99%. HPLC assay showed that ginsenoside Rg1 in the decoction group and the nanosuspension group showed a two-compartment model， with distribution half-life（t1/2α） of 0.13 h and 2.55 h， and elimination half-life（t1/2β） were 14.28 h and 3.85 h， respectively. The relative bioavailability of Shenbai nanosuspension was 127.49%. Compared with Shenbai decoction， the time to peak（tmax）， peak concentration（Cmax） and area under the drug-time curve（AUC） of the overall components and ginsenoside Rg1 in Shenbai nanosuspension were increased. ConclusionThe established AUAWC can be used for the pharmacokinetic study of the overall components of TCM preparations， which is complementary to the results of individual components measured by HPLC， and can provide useful reference for the in vivo study of new dosage forms of TCM.

The clinical value of 123I-metaiodobenzylguanidine myocardial imaging in the diagnosis of dementia with Lewy bodies / 生物医学工程学杂志

Metaiodobenzylguanidine (MIBG) is an analog of norepinephrine that accumulates in sympathetic nerve endings soon after intravenous administration. The degree of accumulation reflects the uptake, storage and release of transmitters by noradrenergic neurons. Myocardial imaging with 123I labeled MIBG ( 123I-MIBG) can be used to estimate the extent of local myocardial sympathetic nerve damage, which has been widely used in the diagnosis and treatment of various heart diseases. In recent years, numerous studies have been carried out on the application of 123I-MIBG in the diagnosis of degenerative diseases of the nervous system (such as Parkinson's disease and dementia of Lewy body), and have made some achievements. The purpose of this review is to summarize the current clinical application of 123I-MIBG myocardial imaging in the diagnosis of dementia with Lewy bodies, the problems in imaging technology and the possible research directions in the future, so as to provide valuable reference information for clinicians to reasonably and accurately apply this technology in the early diagnosis and discrimination of dementia.

Study on Synthesis of Tumor Marker PHPAA Molecular Imprinted Polymers and Its Performance / 中国药房

OBJECTIVE:To synthesize 4-hydroxyphenylacetic acid(PHPAA)molecular imprinted polymers(MIPs),and to provide reference for separation and enrichment of PHPAA in urine of cancer patients. METHODS:With PHPAA as template molecule and azobisisobutyronitrile as evocating agent,MIPs was synthesized by precipitation polymerization using 4-vinyl pyridine(4-V),acrylamide(AM),1-vinyl imidazole(1-V)and o-diaminobenzene as functional monomers,ethylene glycol dimethacrylate(EGDMA)and trimethylolpropane trimethacrylate(TRIM)as crosslinking agent. Using scanning electron microscope,infrared spectrum,static adsorption test and molecular recognition performance test used adopted to characterize the structure and performance of MIPs. RESULTS:MIPs1(4-V,EGDMA)microspheres adhered seriously,and MIPs2(AM, EGDMA)microspheres are aggregated. MIPs3(1-V,TRIM),MIPs4(o-diaminobenzene,TRIM)microspheresare were dispersed and had good sphericity. Characteristic absorption peak of PHPAA was not found in infrared spectrum of MIPs. The adsorption capacity of each MIPs was higher than that of blank imprinted polymer without the template molecule,and increased as the increase of template molecular concentration. The adsorption capacity of MIPs3 was significantly higher than that of other MIPs,and its static distribution coefficient(0.14)of PHPAA was higher than that of other structural analogues [PHPA(0.06),TA(0.01)],selective separation factors of PHPAA to PHPA,PHPAA to TA were 2.3,11.5,respectively. CONCLUSIONS:MIPs synthesized with 1-V as functional monomer and TRIM as crosslinking agent has the ability of specific adsorption and selective recognition. It can used as solid phase extractant to separate and enrich low content of PHPAA in the urine of tumor patients.

Efficacy of combined therapies on keloid / 中华医学美学美容杂志

Objective To evaluate comprehensive therapy in the treatment of keloid effect and the patients' satisfaction.Methods A total of 523 patients with comprehensive treatment,according to the treatment,were divided into group A (surgery combined radiotherapy) and group B (surgery plus corticosteroids),group C (hyperbaric oxygen in combination with radiotherapy),and the therapeutic effect of patients with satisfaction was analyzed.Results Total effective rate of three groups of patients were 69.47％,89.13％,90.32％,respectively.Effective rate in group A was higher than that of group B and group C,there was statistically significant difference between groups A and C (P ＜ 0.05),but no significant difference between the group A and group B (P＞0.05).Difference was statistically significant between three groups of patients' satisfaction,group B better than group A and group C,the difference between group B and C group was statistically significant (P ＜ 0.05).Conclusions Effectiveness of the three combined therapies is obvious,in which radiotherapy plus hyperbaric oxygen is most effective.

Tracheotomy tube as trocar in the electronic bronchoscope instead of thoracoscope / 中国内镜杂志

Objective To investigate the feasibilty of the disposable tracheotomy tube as trocar in the electronic bronchoscope instead of thoracoscope. Methods 86 patients with effusion of unknown origin undergoing medical tho-racoscopy from January 2015 to October 2015, 59 male (68.6%) and 27 female (31.4 %), mean age (49.00 ± 20.00) years (15 ~ 83) years, were randomly divided into two groups, Tracheostomy tube group (group T) and Conventional chest tube group (group C). Group T uses disposable cannula tracheostomy tube as trocar, and group C received conventional medical thoracoscopy chest tube. Then compare the positive rate of pathological diagnosis, operation time, inspection fees, and other adverse reactions between the two groups. Results 40 cases (93.0%) in group T were confirmed diagnosis, including 8 cases of lung pleural metastasis, 31 cases of erculous pleurisy, 1 case of empyema, while 4 cases of unknown diagnosis (7.0%). 33 cases (76.7%) in group C were confirmed diagnosis, in-cluding 4 cases of lung pleural metastasis, 29 cases of tuberculous pleurisy, while 10 cases of unknown diagnosis (23.3 %). The difference was statistically significant between the two groups ( < 0.05). Operative time in group T was (23.86 ± 2.45) minutes, while in group C was (29.88 ± 3.67) minutes, the difference was statistically significant ( <0.05). While the complication rate was no significant difference. Conclusions It is demonstrated that the dispos-able tracheotomy tube as trocar in the electronic bronchoscope instead of thoracoscope which can shorten the opera-tion time, improve the diagnosis rate, reduce costs, worthy of promoting.