Identification of a novel bombesin bioactive peptide QUB2995 and its insulin secreting activity / 中华内分泌代谢杂志

Objective:To identify a novel bombesin bioactive peptide from the skin secretion of Hylarana Latouchii, and to explore its effect on insulin secretion in islet cells.Methods:The skin secretion from Hylarana Latouchii was extracted by electrical stimulation, and the single chain of bombesin peptide was cloned and sequenced. The peptide QUB2995 was synthesized via solid-phase synthesis, then purified using reversed-phase high performance liquid chromatography (HPLC). Matrix assisted laser desorption time-of-flight mass spectrometry (MALDI-TOF) was applied to validate. QPCR and ELISA were used to probe the effect of QUB2995 on insulin secretion in MIN6 and INS-1 cells.Results:A novel bombesin peptide named QUB2995 (GAFGDFLKGAAKA GALKILSIAQCKLSGTC) was found in the skin secretion of Hylarana Latouchii through molecular cloning. The bioactive peptide could significantly promote the proliferation and insulin secretion from mouse islet MIN6 cells and rat islet INS-1 cells. The effect reached a climax at the concentration of 10 -5 mol/L. Conclusion:A novel bombesin bioactive peptide named QUB2995 was found from Hylarana Latouchii. It could significantly promote insulin secretion in MIN6 cells of mouse islets and INS-1 cells of rat islets, indicating its potential in the treatment of diabetes.

Study on Quality Standard for Tussilago farfara Formula Granules / 中国药房

OBJECTIVE： To provide reference for the establishment of quality standard of Tussilago farfara formula granules. METHODS： TLC method was used for qualitative identification of tussilagone in T. farfara formula granules. The content of tussilagone in T. farfara formula granule was determined by HPLC. The determination was performed on a Thermo ODS Hypersil C18 column with the mobile phase consisted of methanol-water （85 ∶ 15， V/V） at the flow rate of 1.0 mL/min. The detection wavelength was set at 220 nm， the column temperature was 25 ℃. Sample size was 20 μL.  RESULTS： TLC spots of tussilagone were clear and well-separated， without interference from negative control. The linear range of tussilagone was 1.39-27.75 μg/mL （r＝0.999 9）. The limits of quantification and detection were 0.153 87 and 0.051 42 μg/mL， respectively. RSDs of precision， stability and reproducibility tests were lower than 2％. The recoveries were 97.12％-103.96％ （RSD＝2.60％， n＝6）. CONCLUSIONS： The method is simple， accurate and reproducible， and suitable for quality control of T. farfara formula granules.

A case of melanotic neuroectodermal tumor of infancy and review of literature / 实用口腔医学杂志

This paper reports a case of melanotic neuroectodermal tumor of infancy (MNTI)arising in the maxilla of a 3-month-old male infant.The treatment included surgical excision of the lesion with safe margin,curettage of the maxilla and removal of associated developing tooth bud.Microscopically,it proved to be a dual tumor with small,neuroblastic-like cells and larger epithelial cells.Immunohistochemical staining demonstrated epitheloid cells HMB45(+),EMA(+),CK(+);neuroblast-like cells NSE(+),GFAP(+),S-100(+),but both cells Vim(+),CD45(-),Myogenin(-).The 18-mouth follow-up showed no recurrence or metastasis.The related literature was re-viewed.

The influence of zoledronic acid on vascular endothelial cell / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the influence of zoledronic acid on vascular endothelial cells.</p><p><b>METHODS</b>The influence of zoledronic acid on proliferation, migration and adhesion of vascular endothelial cells were tested with 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), cell migration assay and cell adhesion assay. The results of each experimental group were compared with the control group and the data statistically analyzed.</p><p><b>RESULTS</b>In a concentration of 0-0.5 mmol/L, the absorbance value decreased from 0.09 to 0.34 as the drug concentration increased. Scratch test showed that the change of width of scratch before and after 24 hours in control, low, medium and high concentration groups were (38.7 ± 0.42), (35.8 ± 4.17), (19.9 ± 0.57) mm (P < 0.001), (12.5 ± 3.89) mm (P < 0.05). Adhesion test showed that the absorbance value in control, low, medium and high concentration groups were 1.14 ± 0.18, 0.95 ± 0.13, 0.81 ± 0.11 (P < 0.01), 0.67 ± 0.19 (P < 0.001). Comparisons between control and experimental groups were analyzed by t-test and P values < 0.05 were considered statistically significant.</p><p><b>CONCLUSIONS</b>Zoledronic acid inhibits the proliferation, migration and adhesion of vascular endothelial cells.</p>

Effects of intrathecal Iidocaine on propofol-induced sedation and content of lidocaine in brain tissues in rats / 中华麻醉学杂志

Objective To investigate the effects of intrathecal (IT) lidocaine on propofol-induced sedation and content of lidocaine in brain tissues in rats.Methods Twenty male Sprague-Dawley rats,aged 2-3 months,weighing 250-350 g,were equally and randomly assigned to one of four groups:control group (group C),iv lidocaine group (group IV-L),IT normal saline group (group IT-NS) and IT lidocaine group (group IT-L).Groups IT-NS and IT-L received IT normal saline 15μl and 2％ lidocaine 15 μl,respectively.Group IV-L received iv 2％ lidocaine 15 μl.Propofol was infused starting from 10 min after IT or iv administration.When the eyelash reflex disappeared,the infusion of propofol was stopped and the dose of propofol consumed was recorded.The rats were sacrificed in IT-L and IV-L groups and brains were removed for determination of lidocaine level in brain tissues (by RP-HPLC).Results Compared with groups C,IV-L and IT-NS,the dose of propofol consumed when the eyelash reflex disappeared was significantly decreased in group IT-L (P ＜ 0.05).No significant difference was found in the propofol requirement when the eyelash reflex disappeared between groups C,IV-L and IT-NS and in the content of lidocaine in brain tissues between groups IV-L and IT-L (P ＞ 0.05).Conclusion Sedation induced by lidocaine administered intrathecally is not due to a direct action of lidocaine on the brain in rats.