Adolescent ; Adult ; Busulfan ; therapeutic use ; Female ; Hematopoietic Stem Cell Transplantation ; methods ; Humans ; Male ; Middle Aged ; Transplantation Conditioning ; methods ; Young Adult

To investigate the influence of the difference enhancers on the transport mechanism of chlorogenic acid (CGA) across Caco-2 cells model, a RP-HPLC method was adopted to detect the concentrations of CGA. At the concentrations of 20 to 80 microg x mL(-1), the difference of absorption rate constants (K(a)) was not statistically significant. At the concentrations of 40 and 20 microg x mL(-1), the ratios of apparent permeability coefficients (P(app)) of the apical to basolateral and the basolateral to apical were 1.14 and 1.18, respectively. With the effect of enhancers K(a) and P(app) increased, the absorption half-life (T1/2) decreased. CGA passed through the Caco-2 cell membrane mainly by passive transport. It showed that monocarboxylic acid transporter (MCT) could be involved in the across membrane transport process of CGA. Borneol had no effect on the cell membrane transport processes. The order of increasing absorption of CGA caused by the enhancers was sodium lauryl sulphate > sodium taurocholate > carbomer.
Absorption ; Acrylic Resins ; pharmacology ; Caco-2 Cells ; Cell Membrane Permeability ; drug effects ; Chlorogenic Acid ; pharmacokinetics ; Humans ; Sodium Dodecyl Sulfate ; pharmacology ; Taurocholic Acid ; pharmacology

Objective To study the changes of flow parameters of superior mesenteric artery (SMA) in children with abdominal type Henoch-Schonlein purpura (HSP) using color Doppler ultrasound.Methods Ten children with abdominal type HSP and 17 controls were included in present study.The blood flow parameters of SMA[including peak velocity(PV),end-diastole velocity(EDV),resistant index(RI)]were measured at acute and recovery stage separately.Statistical analysis was conducted among groups.Results PV were (41.57±8.02)cm/s,(33.38±7.44)cm/s and (35.34±9.73)cm/s in acute stage,recovery stage and control group,respectively.There was no statistically significant difference among groups(F=2.471,P=0.10).EDV were(7.63±4.28)cm/s,(4.23±2.57)cm/s and (3.77±0.87) cm/s in acute stage,recovery stage and control group,respectively.There was significantly significant differences between acute stage group and other two groups(t=0.066,P=0.025;t=0.059,P=0.003).RI were (0.85±0.17),(1.00±0.15) and (1.04±0.13) in acute stage,recovery stage and control group,respectively.Also there was significantly significant differences between acute stage group and other two groups(t=1.391,P=0.020;t=1.239,P=0.026).Conclusion For abdominal type HSP in children,the changes of PV,EDV and RI of SMA were significant,which may help us determine the stage of disease.

Nanoparticle delivery systems have good application prospects in the field of precision therapy, but the preparation process of nanomaterial has problems such as short in vivo circulation time, easy recognition, and clearance by the immune system in the body. In recent years, biomimetic nanoparticle delivery systems mediated by natural cell membranes have become a research hotspot to address these issues. The natural membrane biomimetic nanoparticle delivery system cleverly integrates the advantages of natural biofilm "autologous" and "artificial" functional carriers by using endogenous cell membranes to modify the surface of nanocarriers, endowing them with characteristics such as tumor targeting, low immunogenicity, and long blood circulation. Currently, biomimetic nanoparticle delivery systems have been used in the treatment of malignant tumors, cardiovascular diseases, bacterial infections, and other diseases. This paper analyzes the development status and current research hotspots of natural cell membrane camouflaged biomimetic nanoparticle delivery systems mainly reviews the latest research progress of red blood cell membrane camouflaged biomimetic nanoparticle delivery systems in the field of disease treatment in recent years. It focuses on exploring the advantages, future development prospects, and limitations of biomimetic nanoparticle delivery systems based on red blood cell membrane camouflage in improving drug delivery, to provide a reference for the in-depth research and development of this system.

OBJECTIVETo investigate the effects of α3 neuronal nicotinic acetylcholine receptor (nAChR) on apoptosis and p38 signal transduction pathway in SH-SY5Y cells and to assess the roles of α3 nAChR in the pathogenesis of Alzheimer's disease (AD).

METHODSThe levels of α3 nAChR mRNA and protein were measured by real-time PCR and Western blot, respectively, in SH-SY5Y cells transfected with α3 nAChR siRNA. The mRNA level of bcl-2 and bax was measured by the real-time PCR. The siRNA transfected SH-SY5Y cells and control were then treated with 10 µmol/L Aβ25-35 for another 48 h, and the change in apoptotic rate and the levels of p-p38 and p38 were measured by flow cytometry and Western blot. Subsequently these SH-SY5Y cells were exposed to a blocker of p38 protein, and the apoptotic rate was measured again.

RESULTSCompared to the controls, the expression of α3 nAChR at mRNA and protein levels in the SH-SY5Y cells transfected with α3 nAChR siRNA decreased by 95% and 86%, respectively; the mRNA levels of bax increased 2.11 times and that for bcl-2 decreased 0.53 times. The apoptotic rate was unaffected (3.40% ± 0.20%); but it increased after Aβ25-35 treatment (24.52% ± 1.59%); the level of p-p38 protein also increased by 178% in the α3 nAChR inhibited cells treated with Aβ25-35. Compared to controls, the Aβ25-35-treated SH-SY5Y cells and the Aβ25-35-treated and siRNA-transfected cells both showed a reduction in apoptosis after treatment with p38 blocker, especially in the former.

CONCLUSIONThe siRNA silencing of α3 nAChR mRNA may enhance the effect of Aβ25-35 on the cell apoptosis by increasing the levels of p38 protein and bax mRNA and decreasing the level of bcl-2 mRNA, which may play a role in the pathogenesis of AD.

Alzheimer Disease ; etiology ; Amyloid beta-Peptides ; metabolism ; Apoptosis ; Cell Line, Tumor ; Gene Silencing ; Humans ; Neuroblastoma ; metabolism ; pathology ; Peptide Fragments ; metabolism ; Proto-Oncogene Proteins c-bcl-2 ; genetics ; metabolism ; RNA, Messenger ; metabolism ; RNA, Small Interfering ; genetics ; Receptors, Nicotinic ; genetics ; metabolism ; Signal Transduction ; Transfection ; bcl-2-Associated X Protein ; genetics ; metabolism ; p38 Mitogen-Activated Protein Kinases ; metabolism

Microscopic identification and NIRS methods were applied to identify Clematidis Radix et Rhizoma of two different origins. The results showed that both methods could identify the samples. NIRS could identify the two samples nondestructively, and provides a basis for establishment of a standard herbs radix clematidis NIRS fingerprint in the future.
China ; Clematis ; chemistry ; classification ; Drugs, Chinese Herbal ; analysis ; chemistry ; Rhizome ; chemistry ; Spectroscopy, Near-Infrared ; methods

Adolescent ; Adult ; Dermatitis, Occupational ; etiology ; therapy ; Drug Eruptions ; etiology ; therapy ; Female ; Humans ; Male ; Methylprednisolone ; therapeutic use ; Trichloroethylene ; adverse effects

Air Pollutants, Occupational ; adverse effects ; analysis ; Dust ; analysis ; Environmental Monitoring ; instrumentation ; methods ; Humans ; Industry ; Inhalation Exposure ; statistics & numerical data ; Maximum Allowable Concentration ; Occupational Exposure ; statistics & numerical data ; Quartz

Objective To explore the changes of Sema3A and it′s receptor Npl in temporal lobe epilepsy(TLE)rat brain and the roles in epileptogenesis mechanism.Methods TLE model was established with male healthy SD rats,in which mossy fiber sprouting(MFS)was verified using Neo-Timm staining method.Sema3A mRNA,Npl mRNA and protein was respectively analyzed by immunohistochemistry and in situ hybridization in the entorhinal cortex(EC)or dentate gyrus(DG)at different time after LiCL-PILO induced TLE.Results There were Mossy fiber sprouting(7d:0.70?0.42,15d:1.50?0.52,30 d:2.20 ?0.41,60 d:2.50?0.51)in DG inner molecular layer(IML)of TLE rat compared with those of controls (P

[Objective] To investigate the expression of MICA mRNA and protein in osteosarcoma and give a more comprehensive understanding to its immune evasion.[Methods] RT-PCR was used to analyze MICA mRNA in 11 osteosarcoma tissues and 5 osteosarcoma cell lines.MICA expression was examined in 66 paraffin-embedded osteosarcoma tissues and 6 paraffin-embedded normal bone tissues by immunohistochemistry,and MICA protein in 9 fresh osteosarcoma tissues was detected by Western blot too.MICA surface expression was estimated by flow cytometry.[Results] Nine of eleven (81.8%) osteosarcoma specimens and all of the five cell lines consistently expressed MICA mRNA.Up-regulation of MICA expression was found in osteosarcoma (34/66,51.6%),compared with normal bone tissues (0/6,0%).The cell lines Saos-2,MG63,and HOS showed positive surface MICA expression,while the U2OS and OS732 showed very limited expression.[Conclusion] MICA mRNA and protein predominantly expressed on osteosarcoma tissues and cell lines.