Now the layer-by-layer self-assembling (LbL) technique has become an attention-getting reparative methodology for ultrathin film formation. Many scientists in different academic areas including bioengieering, medical science, drug controlled release, optoelectronics dive into this technology. Among of them, carriers with structures which can be flexibly controlled are more useful since functional structure units can be assembled in layer-by-layer fashion, which is simplicity, chemical mildness, concealment, can achieve targeted drug delivery and so on. In this review, we have discussed the advantage, development, influential factors and applications of LbL. We have focused on reviewing the applications and perspective of nanoparticles, microgels and capsules were both fabricated via the LbL assembling at drug delivery.

[ ABSTRACT] AIM: To determine the aberrant methylation status in the gene promoter regions of CDH13, RASSF1A, DLEC1, SEPT9 and RUNX3 by detecting the plasma specimens and the value of their combined detection for di-agnosis of lung cancers.METHODS:Nest methylation specific PCR ( nMSP) was used to detect the promoter methylation status of the 5 genes in the plasma from 106 normal controls, lung cancer tissues, lung benign tissues and the plasma from 106 patients with lung cancers.Multiple displacement amplification ( MDA) was used to amplify modified genomic DNA to solve the problem of insufficient of plasma DNA template.RESULTS: The positive rates of promoter methylation of CDH13, RASSF1A, DLEC1, SEPT9 and RUNX3 in the lung cancer tissues were 51.9%, 44.3%, 54.7%, 36.8%, 24.5%, respectively, and those in the plasma were 46.2%, 41.5%, 50.9%, 31.1%, 19.8%, respectively.The re-sults of the Kappa consistency check showed that the lung cancer tissues and the plasma had obviously coherence in the methylation status of the 5 gene promoter regions.Combination of DLEC1, CDH13, RASSF1A, and SEPT9 had a higher di-agnostic efficiency than the others, as their ACC value was 0.8208 and youden index was 0.6415 ( with the sensitivity of 81.13% and the specificity of 83.02%) .CONCLUSION:Combination detection of promoter methylation of lung cancer-related genes in the plasma is expected to apply to the early diagnosis of lung cancer.

The evolution of the quality control concepts of medical products within the global context and the development of the quality control technology of Chinese medicine are briefly described. Aimed at the bottlenecks in the regulation and quality control of Chinese medicine, using Big Data technology to address the significant challenges in Chinese medicine industry is proposed. For quality standard refinements and internationalization of Chinese medicine, a technological innovation strategy encompassing its methodology, and the R&D direction of the subsequent core technology are also presented.
Data Mining ; Databases, Factual ; Drug Industry ; organization & administration ; standards ; Drugs, Chinese Herbal ; analysis ; pharmacology ; standards ; Humans ; Quality Control

Objective:To determine whether implantation of an intraocular lens(IOL) with a modified prolate anterior surface results in reduced spherical aberration and improved contrast sensitivity after cataract surgery.Methods: Consecutively 72 eyes were selected from 53 senile cataract patients who had received phacoemulsification and IOL implantation in Peking University Eye Center.Each was randomly assigned to receive Tecnis Z9001 IOL or Sensar AR40e(both made by AMO).Three months after operation,the eyes underwent several tests including visual acuity,optometry and wavefront aberration examination.Mesopic contrast sensitivity test was measured with ROLAND BA-4 Contrastometer.Results: The eyes treated with Tecnis Z9001 had significantly less spherical aberration.The eyes treated with Tecnis IOL got lower C12 coefficient and RMS4 than those with Sensar AR40e(P value

The purpose and meaning of epidemiology curriculum,the current problems existing in the teaching and teaching reforms for different specialties were discussed.

Objective To investigate the effects of the intracellular delivery of HPV16E7_(49-57) epi- tope modified by cell-penetrating peptide HIV-Tat_(49-57) and its influential factors.Methods The unique HLA-A2+/H-2kb+ limited CTL epitope of HPV16E7 fused with a cell-penetrating sequence (HIV-Tat_(49-57)) was designed and a 18-mer peptide was synthesized with aid of polypeptide solid phase synthesis technique. The intracellular transport capabilities of these peptides were tested with indirect immunofluorescence assay and laser confocal microscopy.In addition,the CTL epitope and 18-met peptide were used to stimulate PBMC of healthy C57BL/6 mice,and the E7_(49-57) specific CTL responses were measured by LDH cytotoxicity detection kit in PBMC of those mice.Results The HIV-Tat_(49-57) peptide could efficiently assist HPV 16E7_(49-57) peptide in penetrating into BHK cells in a time and dose-dependent manner (P＜0.05).Further- more,the specific CTL activity induced by the 18-mer peptide was much stronger than that induced by the single epitope.Conclusion The results show that HIV-Tat_(49-57) can efficiently deliver the exogenous anti- genic peptide into the cytoplasm of live cells,and induce specific CTL response.This is a new way to de- sign peptide-based vaccine of HPV.

Objectives To investigate the impact of ischemic preconditioning (IPC) on dynamics of homing of endothelial progenitor cells (EPCs) after renal ischemia reperfusion injury (IR).Methods Sixty male Sprague-Dawley rats were randomly divided into three groups after right-side kidney nephrectomy:for sham-operated rats,lumbotomy without vascular clamping was performed; IR rats were clamped renal blood vessels for 40 minutes while IPC rats were pre-treated with 15 min ischemia and 10 min reperfusion.At 3,12,24 h,and 3 days after reperfusion,the pool of circulating,kidneys,lungs and spleens were harvested.The extent of renal injury was assessed by biochemical and histological examination.The dynamics of homing of EPCs was observed by flow cytometry.Results The rats in IPC group exhibited significant improvements in renal function and morphology.Compared with IR group and sham group,the number of EPCs in blood was increased in the IPC group at 12 h and 24 h after reperfusion (P ＜ 0.05).The number of EPCs in kidney was increased at all times pointin the IPC group and IR group as compared to the sham group (P ＜ 0.05.In addition,EPCs number was increased in IPC group compared with the IR group at 12 h and 24 h [(11.36±0.66)％ vs (6.37±0.69)％,(6.31±0.70)％ vs (4.40±0.60)％,all P＜ 0.05].Compared with IR group and sham group,the number of EPCs in the lung was increased in the IPC groups at 12 h after reperfusion [(2.95±0.66)％ vs (1.78±0.59)％,(1.66±0.61)％,all P ＜ 0.05].The number of EPCs in spleen was increased in the IPC group at 72 h as compared with the IR group and sham group [(0.55±0.06)％ vs (0.34±0.07)％,(0.31±0.06)％,all P ＜ 0.05].Conclusions Endogenous EPCs may home to injured kidney after IPC.EPCs can also gather in the lungs and spleen.

Objective To study the effect and mechanism of human gastric cancer cell's apoptosis in simulated CO2 pneumoperitoneum environment by HIF-1α. Methods We used a closed box to simulate CO2 pneumoperitoneum environment, a standard surgical insufflator maintained pressure of the box at 0,5,10 and 15 mm Hg respectively. MKN-45 cell's HIF-1α mRNA and protein expression were observed before and after silencing cell's HIF-1α by real time RT-PCR and Western blot. Cell's bcl-2/bax was studied by immunohistochemistry before and after silencing HIF-1α. Cell's apoptosis ratio was measured using Annexin V-FITC/PI double labelled staining. Results In 15 mm Hg group, MKN-45 cell's HIF-1α mRNA and protein expression were significantly higher than control group (P<0.01 ), while the difference was not significant among 0,5,10 mm Hg group and control group (P>0.05). In 15 mm Hg CO2 pressure, cell's bcl-2/bax was obviously lower than in control group (P<0.05) and apoptosis ratio was more than control group(P<0.01). When HIF-1α was silenced, cell's bel-2/bax and apoptosis ratio weren't significantly different between 15 mm Hg group and control group (P>0.05 ). Conclusions MKN-45 cell's apoptosis did not experience any alterations under 0,5,10 mm Hg.15 mm Hg CO2 pneumoperitoneum environment enhanced cell's apoptosis probably by way of HIF-1α.

Objective To investigate the effects of different CO2 pneumoperitoneum on cell cycle and cell cycle protein of a gastric cancer cell line. Methods Human gastric cancer cell line MNK-45 were exposed to 0,10,12 and 15 mm Hg CO2 pneumoperitoneum in vitro for 4 hrs. Cell cycle was measured by flowcytometry, the expression of CDK4 ,Cyclin D1、Rb and pRb was studied by Western-blot, and the binding ability of CDK4 and Cyclin D1 was evaluated by immunoprecipitation. Results The cell proliferation index in 15 mm Hg CO2 pneumoperitoneum group dropped significantly (27.4% ± 3. 7%) vs. (36. 4% ±3. 3%) ,P <0. 05, while that in other groups did not change significantly. The protein of CDK4、Cyclin D1and binding ability of Cyclin D1 and CDK4 dropped dramatically in the 15 mm Hg CO2 pneumoperitoneum group (0.71%±0.12%),(0.93% ±0.21%),(0.54%±0.11%),(0.18% ±0.02%) vs. (1.05% ±0.16%),(1.40% ±0.24%),(0.75% ±0.14%),(0.31% ±0.02%), all P<0.05. There were no changes of Rb in protein levels, while the phosphorylated Rb dropped obviously. Conclusion There was no obvious effects of clinical CO2 pneumoperitoneum on gastric cancer cells growth and proliferation.

Female ; Humans ; Immunohistochemistry ; In Situ Hybridization ; Infant, Newborn ; Lung ; metabolism ; pathology ; Macrophage Migration-Inhibitory Factors ; analysis ; genetics ; Male ; Respiratory Distress Syndrome, Adult ; blood ; genetics ; pathology