Aged ; Humans ; Leukemia, Myeloid, Acute ; diagnosis ; therapy

Objective: To investigate the role of protein Hsc73 (heat shock cognate protein 73 000) in renal cell cancer metastasis promoted by SDF-1/CXCR4 axis, so as to determine whether Hsc73 participates in CXCR4 nuclear localization. Methods: Western blotting analysis was used to observe the expression of Hsc73 in A498 cells over-expressing CXCR4. The location of Hsc73 and the interaction of CXCR4 with Hsc73 were investigated in SDF-1-stimulated A498 cells by immunohistochemical staining, Co-IP (Co-Immunoprecipitation) experiment, etc. Results: Hsc73 was up-regulated in A498 cells over-expressing CXCR4. Hsc73 was mainly found in the cytoplasm of A498 cells; after stimulation with SDF-1, some Hsc73 appeared in the nuclei. Hsc73 protein was found in the nuclei of A498 cells after Co-IP with anti-CXCR4 antibody. Conclusion: Hsc73 as a common molecular chaperone participates in the intra-cellular translocation of CXCR4; Hsc73 also plays a key role in the activation of SDF-1/CXCR4 signal pathway and may be involved in the nuclear translocalization of CXCR4.

Boxing/injuries* ; Forensic Medicine ; Humans ; Intracranial Hemorrhages

Objective To investigate the reasons of complications after ultrasound-guided PTBD and explore measures for their management. Methods The clinical data of 753 patients with obstructive jaundice treated with ultrasound-guided PTBD in our hospital from January 2001 to June 2008were retrospectively analyzed. Results The 753 patients received a total of 791 treatments of PTBD.The occurring rates of severe, common, and long-term complications were 1.14 % (9/791), 11.88 %(94/791 ) and 4.3% (9/791), respectively. Only 1 patient died of manipulation-related complications.Conclusion Ultrasound-guided PTBD is an effective method for treatment of obstructive jaundice.

Cell Differentiation ; drug effects ; Cells, Cultured ; Fetal Blood ; cytology ; Fibroblast Growth Factor 4 ; pharmacology ; Hepatocyte Growth Factor ; pharmacology ; Hepatocytes ; cytology ; Humans

Animals ; Oocytes ; metabolism ; physiology ; Receptors, G-Protein-Coupled ; physiology ; Receptors, Purinergic P2X ; physiology ; Xenopus laevis

[Objective] The aim of the present study was to investigate the role of membrane estrogen receptor (mER) mediated pathway in the proliferation and apoptosis of endothelial progenitor cells (EPCs). [Methods] Bone marrow (BM)-derived EPCs were cultured. The cells were divided into different groups, plus or not plus estrogen receptor blocker (ICI 182,780), PI3K inhibitors (LY294002), and NOS inhibitor (L-NAME) to show the effect of E_2-BSA on EPCs. The proliferation of EPCs was determined by MTT and nitric oxide (NO) release was measured by chromatometry. Apoptotic cell death was determined using the Hochest 33258 staining. The expression of phosphorylated eNOS (p-eNOS) were detected by Western blot. [Results] E_2-BSA could increase EPCs proliferation, and this effect was inhibited by estrogen receptor blocker ICI 182,780, thus indicated that mER-initiated membrane signaling pathways were involved in the action of estrogen on EPCs. E_2-BSA increased nitric oxide production and inhibited apoptosis induced by serum withdrawal, and this effect also inhibited by PI3K inhibitor (LY294002), NOS inhibitor (L-NAME)and estrogen receptor blocker(ICI 182,780), thus indicated that PI3K/Akt/NO pathway was involved the effect of estrogen on EPCs apoptosis. Moreover, E_2-BSA treatment increased phosphorylation of eNOS (p-eNOS). PI3K inhibitors (LY294002) also blocked these effects. [Conclusions] The results of present study suggested that mER mediated EPCs proliferation and apoptosis were related to the PI3K/Akt/eNOS pathway.

Objective To study the characteristics of mesenchymal stem cells(MSCs)derived from chronic myelogenous leukemia(CML)patients' bone marrow and examine their hematopoiesis support in vitro.Methods MSCs from CML were obtained and cultured.Immunophenotype and in vitro differentiation capacities were investigated.Moreover,the Ph chromosome and bcr/abl gene of CML derived MSCs were detected.The expression of cytokines was detected by RT-PCR,and hema- topoiesis support of MSCs in vitro was detected by long-term bone marrow culture and the methylcel- lulose progenitor assay.Results CML derived MSCs showed a typical fibroblast like morphology. They were positive for CD29,CD44 and CD105,while negative for CD14,CD31,CD45,CD34 and HLA-DR.Under suitable conditions,CML derived MSCs could differentiate into osteoblasts and adi- pocytes.Further,CML derived MSCs showed a normal choromosome,and did not express bcr/abl gene.At last,they expressed hematopoiesis cytokines and possessed ability of hematopoiesis support in vitro.Conclusion There are MSCs with multidirectional differentiation potential in CML bone mar- row and they possess the ability of hematopoiesis support.

Objective To compare two methods 3D flash and diffusion-weighted images(DWI)in reconstructing the brain surface anatomy,and to evaluate their displaying ability,advantages,limitations and clinical application.Methods Thrity normal cases were prospectively examined with 3 D flash sequence and echo-planar DWI.Three-dimensional images were acquired with volume-rendering on workstation.Brain surface structures were evaluated and scored by a group of doctors.Results Main structures of brain surface were clearly displayed on three-dimensional images based on 3D flash sequence.Average scores were all above 2.50.For images based on DWI,precentral gyrus,postcentral gyrus,superior parietal lobule, superior frontal gyrus,precentral sulcus,central sulcus,postcentral sulcus,intraparietal sulcus and superior frontal sulcus were best shown with average scores between 2.60-2.75,However,supramarginal gyrus, angular gyurs,middle frontal gyrus,inferior frontal gyrus,superior temporal gyrus,lateral sulcus,inferior frontal sulcus could not be well shown,with average scores between 1.67-2.48.Middle temporal gyrus, inferior temporal gyrus,superior temporal sulcus and inferior temporal sulcus can only get scores from 0.88 to 1.27.Scores of images based on 3D flash were much higher than that based on DWI with distinct differentiations,P values were all below 0.01.Conclusion Three-dimensional images based on 3D flash can really display brain surface structures.It is very useful for anatomic researches.Three-dimensional reconstruction of brain surface based on DWI is a worthy technique to display brain surface anatomy, especially for frontal and parietal structures.

Objective To evaluate the effect of the high frequency oscillatory ventilation(HFOV) on the treatment of premature neonates with respiratory distress syndrome(RDS).Methods Seventy premature infants with RDS were randomly grouped as HFOV group(n=33) and conventional mandatory ventilation group(CMV group,n=37),based on their fetal age,weight,age,and their clinical condition from Jan.to Sep.in 2009.The blood gas analysis was detected and compared between the 2 groups.Results In HFOV group,the inhaled oxygen concentration,pa(CO2) decreased after treatment for 6 h,which were significantly lower than those at the beginning of the therapy(Pa