BACKGROUND: Research about magnetic drug microsphere has developed rapidly at home or abroad; additionally, previous studies have been focused on glucan, chitosan, and polyester as coating materials; however, gel material has been less reported,in particular gel-coating berberine microsphere has been not reported yet.OBJECTIVE: To prepare berberine magnetic gelatin drug microsphere, and to evaluate drug releasing, loading, and cross-linking using dynamic dialysis and light electron microscope.DESIGN, TIME AND SETTING: Preparation and property of microsphere were performed in Guizhou Yikang Pharmacy Co., Ltd.And Guizhou University from February 2004 to May 2006.MATERIALS: Gel, berberine, glutaraldehyde, liquid paraffin, and Fe_3O_4 were used in this study.METHODS: Magnetic microspheres of berberine drug with gelatin and Fe_3O_4 were prepared by a reverse phase suspension cold-condensation method according to biocompatibility of gel, solidification of glutaraldehyde, and disperse medium of liquid paraffin.MAIN OUTCOME MEASURES: Structure, morphology, drug-loading rate, entrapment efficiency, and in vitro releasing of drug microsphere.RESULTS: The diameter of the microsphere was under 20 urn. Scanning electron microscope demonstrated that Fe_3O_4 and berberine were compounded by gel into a round shape, and the mixture was expressed on micrometer. Ultraviolet absorption and infrared analysis suggested that berberine magnetic gelatin drug microsphere still had structure and property of raw drug. The drug-loading rate of berberine microsphere was 7.2%, the content of Fe_3O_4 was 20.8%, and the entrapment efficiency was 62.6%.the sustained-releasing ability of microsphere was well, and the releasing content counted for 83.5% of total drug within 7 hours.CONCLUSION: The berberine magnetic gelatin drug microsphere which was prepared by reverse phase suspension cold-condensation method characterizes by sample preparation, small diameter, regular morphology, and great sustained-releasing ability.

Objective In this article, the mode change and features of knowledge service of TCM professional library in the creation times were expounded. Knowledge service is the main trend of library service in the 21 century. As a professional TCM library, we have made attempts on providing omnibearing knowledge service of medicine, scientific research, teaching and clinical practice for our readers.

Integrin is a main factor that mediates adhesive attraction between the cell and the extracellular matrix,and it participates in the formation of new vessel lumens and the construction of the rete vasculosum by regulating endothelial cell adhesion and migration.The extracellular matrix is the ligand of integrin.Collagen and laminin's deposition form new vessel lumens.The vascular endothelial growth factor promotes the proliferation of endothelial cells,accelerates angiogenesis and increases the permeability of blood vessels.This review focuses on the roles and correlation of integrin and VEGF in angiogenesis.

Objective:To investigate the expression of collagen typeⅠ(ColⅠ),collagen typeⅣ(ColⅣ)and fibronectin(Fn)in laryngeal squamous cell carcinomas(LSCC)and their pathobiological relationship with invasion and metastasis of tumor.Method:The expression of ColⅠ,Col Ⅳ and Fn was detected by immunohistochemistry method in normal tissue of latero-carcinoma and tissue of carcinoma in 60 specimens of LSCC.Integral optical density(iOD)was detected by image analysis of computer and was analyzed by SPSS13.O.Result:The expression of ColⅠ was obvious and integrity.The expression of Col Ⅳ and Fn of basal membrane was like intact line-shape appearance and Fn of interstitial substance appeared like a complete network in the normal tissue f latero-carcinoma.Their expression decreased gradually and their integrity was broken and disappeared gradually from well to poorly differentiated LSCC.Their expressions also fell off with the tumor size,clinical stage and cervical lymphatic etastasis gradually and consistently in LSCC.Their variances were statistical significance separately(P＜0.05 or P＜0.01).Conclusion:The expression of ColⅠ,ColⅣand Fn was closely related to tumor invasion,the regional lymph node metastasis and other some pathobiological features in LSCC.A detection of ColⅠ,ColⅣ and Fn as of definite significance on a better comprehension of the possibility of metastasis,choice of surgery and prognosis.

Anti-Bacterial Agents ; Humans ; Mouth Diseases ; therapy ; Photochemistry ; Titanium ; pharmacology

Objective To study the content of isorhynchophylline from different regions and different harvest time.Methods The content of isorhynchophylline in Uncaria rhynchophylla from different regions and different harvest time was tested by HPLC. The Waters Symmetry C18 color (4.6 mm× 250 mm, 5 μm), mobile phase of methanol - 0.01 mol/L ammonium acetate buffer (pH 8.0) (60:40), column temperature 25℃, 20 μl sample volume, velocity of 1.0 ml/min, detection wavelength of 246 nm were setted.Results The isorhynchophylline can be detected in different regions and different harvest time, with the highest content was found in Ningming county and from September to February of the next year.Conclusion The content of isorhynchophylline in Uncaria rhynchophylla varied from different regions and harvest times. The best harvest time is during September to February of the next year.

Objective:To investigate the protective effects and mechanism of ligustrazine on myocardial ischemia reperfusion injury(MIRI) in rats.Methods:30 Wistar rats were divided into three groups randomly:sham operation group,ischemia reperfusion injury group(IR),and ligustrazine preconditioning group(LI).The model of MIRI was produced,Immunohistochemical S-P method was used to detect the expressions of HSP25 and p38MAPK proteins in MIRI tissues.Results:Compared with IR group,the expression of HSP25 protein in LI group increased significantly(P

Objective To study the role of GABA (? aminobutyric acid) transporters in kindled.Methods The rat's GABA model following PTZ kindled was made.The expression of GABA transporter subtype in the hippocampus(GAT 1 mRNA) was measured after PTZ (pentylenetetrazol) kindled seizures by using semiquantitative technique,reverse transcription polymerase chain reaction (RT PCR).Results GAT 1 mRNA was significantly increased in the hippocampus at 0 hour,48 hours,and 1 week after PTZ kindled seizures. Up regulation of expression of GAT 1 mRNA returned to the control levels after 1 month. No changes in the expression of GAT 1 mRNA were observed after 60 days of PTZ kindled seizures.Conclusion The expression of GAT 1 mRNA with up regulation may be associated with the epilepsy susceptibility.

Objective To discuss the method of raising the rate of cut healing by first intention with electrized copper needles and removal of the angioma.Methods Analysis of the clinical history of 68 cases of angiomatous therapy by using the method of electrized copper needles and removal, and the investigation of the connection between the therapy method and the cut healing.Results The healing rate of the cut by first intention is 100% in the total resection of tumor, each 33.33% in the partial resection of tumor and the resection under skin flap, 0% in the resection of tumor and the skin grafting on the surface of wound. When the voltage controlled at 6V is compared with others, remarkably there is the difference (P

Objective To establish a pretreatment method which is applicable to the determination of strontium(Sr)in toothpaste by flame atomic absorption spectrometry.Methods The pretreatment was performed by using digestion pot technique, with lanthanum nitrate as the anti-interference agent.Flame atomic absorption spectrometry was used in this study,the parameters of digestion temperature and the results of two pretreatment methods were compared.Results The toothpaste sample was digested completely by using digestion pot technique with little examined elements lost during digestion.Time-saving and pollution-free were seen in the test.The detection limit of this method was 0.02?g/ml,and the RSDs were 0.98%-3.01%.The recovery rate was at the range of 94.7%-110%.No significant difference was seen between these two pretreatment methods.Conclusion This method has advantages of high sensitivity and precision in the determination of strontium in toothpaste by flame atomic absorption spectrometry,so it can be employed in various laboratories.