BACKGROUND:Previous research has demonstrated human bone marrow mesenchymal stem cells(HMSCs)differentiate into hepatocyte-like cells;however,biological characteristics and differentiation mechanism remain unclear,and differentiation system remains immature.OBJECTIVE:To investigate the feasibility of hepatocyte growth factor(HGF)and epidermal growth factor(EGF)to induce the differentiation of HMSCs into hepatocyte-like cells.METHODS:HMSC5 were obtained from patients with esophageal cancer and were separated by density gradient centrifugation combined with attachment method.The phenotypes of MSCs were identified by flow cytometry.The third-passage HMSCs were divided into four groups:HGF(adding 20 μg/L HGF),EGF(adding 20 μg/L EGF),HGF+EGF,and blank control groups.Morphology was observed using inverted microscope.At days 7 and 14 after induction,α-fetoprotein and albumin mRNA expressions were detected using RT-PCR assay.RESULTS AND CONCLUSION:The HMSCs did not express hematopoietic cell CD34 and CD35,but strongly expressed β1-integrin CD29 and matrix receptor CD44.HMSCs changed from long fusiform shape to polygon or similar round shape in the HGF,EGF,and HGF+EGF groups.At days 7 and 14 after induction,α-fetoprotein and albumin mRNA expressions were positive.However,polygon cells were not observed in the blank control group,and α-fetoprotein and albumin mRNA expressions were negative.This suggested that HGF,EGF,and HGF+EGF could induce the differentiation of HMSCs into hepatocyte-like cells;however,their differentiation ability still needs to be further semi-quantitatively analyzed using immunohistochemical staining.

Objective To detect the neurofibromin expression and observe the biological features of the osteoblasts of patients with type 1 neurofibromatosis and scoliosis. Methods 10 cases of congenital scoliosis and 8 cases of NF1 scoliosis were chosen. The two groups were with the similar age(with the average of 11.7 years and 12.5 years) and Cobb angle(with the average of 85? and 94?). Cancellous bone was harvested from the ilia and the bone explants culture system was used. Proliferation of the osteoblasts, and also the specific differentiation index including alkaline phosphatase, type Ⅰ collagen and osteocalcin was assayed in sewnd generation osteoblasts. Neurofibromin expression in the two kinds of osteoblasts was detected with immunoprecipitation followed by Western blot. Results Compared to the osteoblasts of patients with congenital scoliosis, lower level of neurofibromin was expressed in osteoblasts of patients with NF1 scoliosis, (the OD value was 1.05?0.06 and 2.59?1.40 respectively, P=0.002). The level of alkaline phosphatase, type Ⅰ collagen and osteocalcin were significant lower in osteoblasts of patients with NF1 scoliosis than those of CS patients (44.69 IU/mg vs 51.38 IU/mg, P=0.019; 226.34 ng/mg vs 249.93 ng/mg, P=0.014; 7.41 ng/mg vs 8.87 ng/mg, P=0.049). But the proliferation rate of the NF1 osteoblasts was significant higher than that of the CS osteoblasts (3.34 and 2.70 respectively, P=0.049). Conclusion With the decrease of neurofibromin expression, the NF1 osteoblasts show some defects in their function, these function defects may contribute to varieties of skeletal abnormalities as dystrophic change and decreased bone density.

Hepatectomy ; Humans ; Liver Neoplasms ; surgery ; Preoperative Care ; Safety

Cerebrospinal Fluid Rhinorrhea ; surgery ; Female ; Humans ; Middle Aged ; Semicircular Canals ; surgery

Adolescent ; Cyanosis ; complications ; Heart Septal Defects, Atrial ; complications ; Humans ; Male ; Pulmonary Wedge Pressure

Cysts ; complications ; Exophthalmos ; complications ; Frontal Sinus ; pathology ; Humans ; Male ; Middle Aged ; Paranasal Sinus Diseases ; complications

Objective To investigate the changes of vital signs, serum potassium and postoperative comfort of patients treated with MECT in the treatment of low-dose rocuronium.Methods 200 patients with MECT from June 2014 to June 2016 were selected and randomly divided into two groups, and the life signs and adverse reactions were analyzed and compared.Results There was no significant difference between the experimental group and the control group in the recovery time, the recovery time and the recovery time of the pharyngeal reflex.The recovery of spontaneous respiration in the experimental group was earlier than that in the control group, and the difference was statistically significant ( P<0.05 ) .There was no significant difference between the two groups (headache, drowsiness, postoperative irritability) compared with the control group, the incidence of muscle pain in the experimental group was significantly lower than that in the control group, the difference was statistically significant (P<0.05).Conclusion Pre-injection of rocuronium can reduce the level of serum potassium, shorten the recovery time of spontaneous breathing, and reduce the incidence of postoperative muscle soreness.Compared with the conventional MECT method, it can reduce the contraindication of MECT treatment and increase the comfort of patients.

Objective To study CT diagnosis and differential diagnosis of endobronchial tuberculosis and central lung cancer.Methods CT features and differential diagnosis in 48 cases with pulmonary lesions confirmed by clinical and pathology were analyzed retrospectively.Results Of 48 cases,21 cases were endobronchial tuberculosis and 27 cases were central lung cancer including 20 cases of squamous cell carcinoma and 7 cases of small-cell lung cancer.On CT,showing bronchiartia,nodules inside the lumen,the bronchial walls thickened,bronchus involved longer,not accompanied with masses around the affected bronchus,atelectasis and obstructive pneumonia with the bronchiectasis or cavities and calcification,which were strongly promised the endobronchial tuberculosis.And it pointed out the central lung cancer if bronchiartia was shorter,the bronchial walls were thickened clearly and accompanied with masses around the affected bronchus and atelectasis with homogeneous density.Conclusion CT is of certain value in diagnosis and differential diagnosis of endobronchial tuberculosis and central lung cancer.

Objective To investigate the effects of the sense and antisense testes-signal transduction and activator of RNA (T-STAR) gene on the colon cancer cell line HCT-116. Methods The sense and antisense T-STAR gene was stably transfected into HCT-116 cells with lipofectamine. The expression level of T-STAR in those cells was detected by Western blotting and the growth velocity and proliferation of those cells by cytokinetics. Results The growth velocity and proliferation decreased after transfection of the sense T-STAR gene, but increased after transfection of the antisense T-STAR gene. Conclusion T-STAR gene can inhibit the growth velocity and proliferation of HCT-116 cells.

Objective To investigate the changes of telomerase activity after knocking down endogenous expression of T-STAR (testes-signal transduction and activator of RNA) gene in human lung adenocarcinoma cell line A549 by antisense strategy. Methods The mRNA and protein expression of T-STAR gene were determined by RT-PCR and Western blotting, and the telomerase activity was measured by PCR-ELISA, after transfection of T-STAR antisense gene into A549 cells with lipofectamine. Sense pcDNA-STAR and blank pcDNA3.1 transfection served as control. Results The expression of T-STAR gene was significantly inhibited at mRNA and protein level, and the telomerase activity was significantly decreased. Conclusion The down-regulation of telomerase activity may result from inhibition of T-STAR gene expression in lung adenocarcinoma A549 cells.