[Effects of Down-Regulation of on Differentiation and Apoptosis of MPN Cells with Gene Mutation and Survival of 6133/MPL Mice].

Objective: To investigate the effects of down-regulation of p21 activated kinase 1 (PAK1) on the proliferation, differentiation, and apoptosis of myeloproliferative neoplasm (MPN) cells (6133/MPL) with thrombopoietin receptor MPL mutation at codon 515 () and survival of 6133/MPL mice.

Methods: Interference with the protein level of in 6133/MPL cells was assessed using lentivirus-mediated shRNA transfection technology. CCK-8 assay was used to detect the effect of down-regulation of on the proliferation viability of 6133/MPL cells, and colony-forming ability was measured by cell counting.

[Construction of a Mouse Model for Myeloproliferative Neoplasms and an Evaluation System].

Objective: To construct a myeloproliferative neoplasms (MPN) transplanted mouse model with or gene mutation, and establish a systematic evaluation system to verify the success of model construction.

Methods: The bone marrow c-kit cells of the mice were obtained by the following steps: The mice were killed by cervical dislocation, the femur, tibia and ilium were separated, and the bone marrow cells were collected. The c-kit cells were sorted after incubation with CD117 magnetic beads.

[Experimental study of tissue-engineered bone constructed with simvastatin carried by PLGA/CPC and bone marrow stromal cells].

Purpose: To study the feasibility of tissue engineered bone constructed with simvastatin carried by PLGA/CPC and bone marrow stromal cells (BMSCs) and screen the effective drug loading of simvastatin.

Methods: Solvent casting-particle leaching technology combined with the phase separation process was used to prepare the different concentrations (simvastatin mass: 0.1, 0.