Drag-loaded nanoparticle is a new delivery cartier of drug and biomacromoleculc,which have many fortes such as target ability,permeability,controlled release ability and function of promoting cell differentiation.Polypeptide combined nanoparticles can deliver drugs to the targeted tissues by conjugating with specific ligands.Growth factor combined nanoparticles may have better curative effect by maintaining the activity of the growth factors longer.Nanoparticles can effectively deliver genes to the cells in the injured tissue for the enhancemem of the specific function of the cells.Three dimension nanometer fibrous structure combined with nanoparticle based drug delivery could significantly promote the growth of the cell.Magnetic nanoparticles are widely used for the targeted delivery of drugs or genes and separation of biomolecules.Drug loaded nanoparticles have been increasinsly used in tissue enginerring which have shown a tremendous potential.In the present paper,we reviewed the application of drug-loaded nanoparticles in the field of tissue engineering.

Objective To study the expression and clinical significance of TNF related apoptosis-inducing ligand(TRAIL) and Caspase-3 in the bone marrow mononuclear cell(BMMNC) of aplastic anemia(AA) ,and to approach their effect on the apoptosis of haemopoietic stem cell in AA patients.Methods The TRAIL and Caspase-3 expression in 15 cases with newly diagnosed AA patients and remission patients,and 15 cases with normal bone marrow patients were detected by flow cytometry and microplate reader. Results The TRAIL expression of newly diagnosed AA patient, emission AA patients and control group was ( 5.94 ± 2. 57 ) ％, ( 2. 87 ± 1. 72 ) ％ and ( 3.01 ±2. 06)％ respectively,the Caspase-3 expression of newly diagnosed AA patient, emission AA patients and control group was ( 1. 3840 ± 0. 0236), (0. 8018 ± 0. 0126) and ( 0. 7441 ± 0. 0112 ) respectively. The TRAIL and Caspase-3 expression of newly diagnosed AA patient were significantly higher than the remission AA patients and control group,the difference was significant( all P ＜0. 05) ;The TRAIL and Caspase-3 expression of control group were higher than the remission AA patients, but the difference was not significant ( all P ＞ 0. 05 ). Conclusion The TRAIL and Caspase-3 had high expression in the BMMNC of AA patients, and the apoptosis induced by TRAIL and Caspase-3 should play an important role in the pathogenesis of AA.

Objective To increase the recognition and diagnostic rate of multiple myeloma.Methods 43 patients with multiple myeloma confirmed by medula needle biopsy and/or pathology were reviewed.Results Misdiagnosis rate reached 65%.Bone abnormality was not found on X-ray and CT films in 8 cases,the remained 35 cases showed bone destructions in varied degrees and types.Conclusion It's main way for improving diagnostic rate of multiple myeloma that deepen recognition of multiple myeloma.Clinical diagnosis must be combined with imageology,laboratory and pathology.

Objective To investigate the protective effect of Ulinastatin on liver function after precise hepatectomy.Methods Fifty-six patients of hepatocellular carcinoma undergoing hepatectomy were divided into Ulinastatin group (U group,28 cases) and control group (group C,28 cases).Results There were no significant differences in liver function and inflammatory factors between the two groups on the 1 st day before the surgry (P＞ 0.05).Serum ALT levels of (231 ±29;140 ±21;56 ± 13;42 ±6) U/L,were lower than group C (267 ± 29;158 ± 23;69 ± 18;53 ± 8) U/L,all P ＜ 0.05;serum AST levels were (175 ±23;94 ±25;47 ± 16;36 ± 8) U/L,lower than group C (191 ± 17;139 ± 16;64 ± 15;46 ±11) U/L,all P＜0.05;Serum TBIL levels were (30 ±6;39 ±9;31 ±9;21 ±6) μmol/L,lower than group C (34 ± 6;46 ± 7;35 ± 8;26 ± 7) μmol/L,all P ＜ 0.05;Serum hs-CRP levels were (52 ± 22;112 ±23;71 ± 16;42 ± 13) rg/L,lower than group C (69 ±23;129 ±25;72 ± 15;49 ± 15) mg/L,all P ＜ 0.05;serum IL-1 β levels were (7.8 ± 0.9;11.1 ± 1.5;8.9 ± 1.6;5.6 ± 0.9) pg/ml,lower than group C (9.2±1.3;13.0 ±2.1;11.1 ±1.4;7.3 ±0.8) pg/rml,all P ＜0.05;Serum IL-6 levels were (187 ±30;76 ±25;46 ± 15;26 ±8) pg/ml;lower than group C(260 ±36;92 ± 16;53 ± 11;30 ±8) pg/ml,all P ＜ 0.05;Serum TNF-α levels were (17 ± 4;12.0 ± 2.4;8.6 ± 2.4;6.7 ± 2.0) pg/ml,lower than group C (25 ± 4;18.7 ± 3.3;15.0 ± 3.1;9.6 ± 1.7) pg/ml,all P ＜ 0.05.Conclusion Ulinastatin protects liver function in perioperative patients undergoing precise hepatectomy.

Objective To investigate the outcome of high-risk acute non-lymphocytic leukemia treated with sequential low-dose cytarabine and harringtonine(LD-HA) and standard induction. Methods 50 high-risk ANLL. patients (LD-HA group) who were regarded as unfit for intensive chemotherapy were chosen to receive LD-HA. Reinductive treatments with standard regimens would be given for those who did not achieve complete remission. 23 patients DA/HA group given two cycles of standard inductive regimens were taken as the control. Results In LD-HA group 80.0 %. (40/50) reached CR, 2 patients died shortly after inductive therapy. The median leukemia-free survival(LFS) was 19.6 months, and the median overall survival (OS) was 12.2 months. Overall survival was 57.0 % at 1 year, 24.1% at 3 years, and 18.8 % at 5 years. While the CR rate was 73.9 % for DA/HA group, and none died during the inductive therapy. LFS and OS was 19.8 months and 12.1 months, respectively. OS rate was 56.58 % at 1 year, 27.1% at 3 years, and 27.1% at 5 years.There were no difference on OS rates between 2 groups (x2 were 0.009, 0.237 and 1.807, respectively,P ＞0.05). Conclusion In patients who were unfit for intensive chemotherapy, sequential therapy with LD-HA and standard induction improved the rate of complete remission and the duration of survival.

ObjectiveTo investigate the methods and effects on the mobilization and collection of peripheral hematopoietic stem cells.MethodsPeripheral hematopoietic stem cells of 198 cases of healthy donors were selected and mobilized by subcutaneous recombinant human granulocyte colony stimulating factor (rhG-CSF) by (5-10) μg·kg-1 ·d-1 and collected on the 5th day. The effects of gender, height, age and WBC count of donors on mobilization and collection were analyzed. ResultsAll the peripheral hematopoietic stem cells of donors were successfully mobilized.The average counts of mononuclear cells(MNC)and CD34+ cells were (4.19±1.96)×108/kg and (2.98±1.40)×106/kg, respectively, which had no correlation with gender, height and age.The counts of MNC and CD34+ cells collected were positively correlated with the WBC count of peripheral blood (r =0.9201, P =0.0035; r =0.8420, P =0.0149). The donors with WBC ≥20.0×109/L had moresignificant effect than thoseWBC＜20.0×109/L (F =4.688, P =0.0013; F =4.622, P =0.0006). Conclusion The WBC count of peripheral blood from healthy donors is a simple and feasible indicator to predict the quantity of CD34+ cells.