The immunoregulatory effects of mescenchymal stem cell (MSC) and its application have become a focused research topic in recent years. This article reviews the up-to-date research advances in the features and mechanisms of immune regulation of MSC and its application.

Parathyroid Hormone-related Protein( PTHrP) is a polyhormone secretory protein secreted by a variety of tissues and cells that plays fundamental roles in the growth and development of various organs, promotes migration and invasion in breast cancer, prostate cancer and non-small cell lung cancer and also plays a key role in osteolysis.With the development of scientific research, many unknown functions of the parathyroid hormone-related protein will be uncovered.

The immunoregulatory effects of mescenchymal stem cell (MSC) and its application have become a focused research topic in recent years.This article reviews the up-to-date research advances in the features and mechanisms of immune regulation of MSC and its application.

Objective:To develop a novel method for the determination of the related substances in plerixafor. Methods: A re-versed-phase ion-paired HPLC method was applied in the qualitative and quantitative determination of plerixafor by an external standard method. The method was performed on a Waters Xbridge C18 column (250 mm × 4. 6 mm, 5 μm), the mobile phase consisted of 1-heptanesulfonic acid sodium salt buffer (pH 2. 0) and acetonitrile with the ratio of 80 ∶20 (v/v), the flow rate was 1. 0 ml·min-1, the detection wavelength was 210 nm, the column temperature was 35℃, and the injection volume was 10 μl. Results:The degrada-tion products were well separated from the main peak, the LOQ (limits of quantitative) of the related substance 1, 2 and 3 respectively was 21 ng, 35 ng and 26 ng with good linearity within respective linear range(r≥0.999 0) , the average recovery was 99.7%, 100. 3% and 101. 2%, and RSD was 1. 1%, 0. 8% and 1. 7%, respectively(n=9). Conclusion:The method is specific and accu-rate, which can be used for the quality control of plerixafor.

Purpose: To observe the efficacy of combined chemotherapy of navelbine( NVB) and cisplatin ( DDP) plus concurrent palliative local radiotherapy in the treatment of stage M, nasopharngeal carcinoma( NPC). Methods: 21 cases of stage M, NPC received combined chemotherapy of NVB 25 mg/m2 on dl, d8 and DDP 30 mg/m2 on day 1-3. The therapy was repeated every 28 days. All patients were concurrenly treated with palliative radiotherapy for to the distant metastases areas. The radiotherapy dose varied from 15 to 60 Gy. Results: 1.The 1-, 2- and 3- year survival rates of the patients were 71.43%, 14.29% and 9.25% respectively. The median survival time ( MST) was 17 months. 2.The Cox Regression analysis showed that the effect of treatment and the liver invasion are significant prognostic factors. The survival rate is the highest in the patients with lung metastases. Conclusions: This scheme combined chemotherapy of NVB and DDP plus concurrent palliative local radiotherapy can improve the MST of the patients with stage M1 of NPC.

Objective To investigate the role of neutrophils and protease inhibitor in the pathogenesis of hepatic ischemia reperfusion injury. Methods The models of liver ischemia reperfusion (LIR) and orthotopic liver transplantation (OLT) were established in rats. The contents of serum ALT and LDH and liver myeloperoxidase(MPO) were determined. Meanwhile, the hepatic pathohistological changes were observed and the number of infiltrating neutrophils counted. As for the LIR model, the animals were administered with aprotinin (AP) before ischemia. Then reperfusion was achieved 45 min after ischemia. The samples were collected after reperfusion for 4 h. In OLT model, the animals were administered with AP 1 h before the transplantation and the samples were collected 4 h postoperatively. Results The contents of serum ALT and LDH and liver MPO were significantly higher in the control group than in the experimental one (P

Objective To develop a rapid and sensitive method for the determination of the percentage of blood chlormezanone by gas chromatograpy-mass spectrometry(GC/MS)for the clinical application on acute poisoning patients.Methods Chlormezanone in blood was extracted and separated with acetic ether.The acetic ether extractives from the blood were warmed with water at 80℃ and blown to dry with nitrogen gas.The dry extractives were then dissolved in 100?l of ethanol for GC/MS.To set up the linear equation for the determination of blood chlormezanone,draw the standard curve,calculate the extractive yield,detection limit and repeatability of chlormezanone.The GC was equipped with a 30m length,0.25mm I.D.,0.25?m film thickness HP-5MS(5% phenyl-methylpolysiloxane).Helium was used as the carrier gas at a constant flow rate of 1.0mL/min.The 1?l samples was injected GC/MS in split mode of 10∶1.The temperature program:160℃ for 2min,10℃/min up to 280℃ and hold for 10min.The injector,MS quadrupole rods,ion source and transfer line were kept at 250℃,150℃,230℃ and 280℃,respectively.The EI electron impact energy was 70eV.Results The extractive yield with acetic ether for blood chlormezanone was 82.1%,RSD=6.6%,implying that and acetic ether is an ideal extraction solvent.The calibration curve was y=13 852x+140 588,r=0.998 2.The detection limit was 4?g/L(SCAN m/z 30-280)and 0.1?g/L(SIM m/z 98,152,154).The RSD of precision in one day was 2.6%.The RSD of the precision between days was 4.9%.Conclusions The extraction and analysis method is suitable to the diagnosis of the acute poisoning patient of chlormezanone.

In the trends of large-scale brain research projects around the world, the China Brain Project aims to promote the understanding of the basic principles of the brain, and use the basic research of neuroscience to serve some urgent social and economic needs at the same time.As we approach the launch of this effort aimed at revolutionizing our understanding of cognitive principles of the brain, early diagnoses of brain diseases and brain-like intelligence technologies, it is timely to review the new progress in recent international brain research projects, and the deployment and future trajectory of neuroscience research in China.

Urinary sodium was measured by means of 24-hour urine collection in 186 patients with type 2 diabetes.All patients were categorized into quartiles of urinary sodium.There was a significant positive trend of association of greater carotid intima-media thickness(CIMT) with increasing urinary sodium quartile,even adjusting for age,smoking,and blood pressure (Ptrend＜0.01).Multiple linear regression analysis showed that 24-hour urinary excretion may be associated with CIMT in type 2 diabetes patients (β=0.074,P＜0.01).

Objective To investigate the effects of P-selectin gene knockout on the biological characteristics of mice. Methods P?selectin knockout (PKO) mice and C57BL/6 mice were housed in SPF environment. To make sure that the mice were pure PKO mice by gene identification. To determine the general condition, the activity status, reproduction of P?selectin knockout mice were observed and tested. HE staining was used to observed the histological morphology and struc?tures of 6?week?old and 18?week?old P?selectin knockoutout mice. Results PKO mice and C57 mice have similar multiplica?tion, there was no significant difference in reproduction and blood routine test. The stuctures of liver, spleen, lung and kid?ney were normal. Conclusions P?selectin knockout has no significant effects on reproduction, blood routine test and major organs. This research provides animal model theoretical basis for further study on the effects of P?selection in diseases.