OBJECTIVETo investigate the influence of Rehmannia glutinosa oligosaccharides (ROS) on the proliferation of 3T3-L1 adipocytes and insulin resistance.

METHOD3T3-L1 preadipocytes were cultured, the proliferation of 3T3-L1 preadipocytes was detected by MTT method. Insulin resistant 3T3-L1 adipocytes cell model was induced by dexamethasone and the change of glucose concentration in cell culture was determined after ROS treatment.

RESULTIn the high glucose DMEM culture media, MTT method showed that the absorbance at 570nm of 3T3-L1 preadipocytes was increased and that of 3T3-L1 adipocytes was decreased. ROS significantly increased glucose consumption in 3T3-L1 preadipocytes and adipocytes culture in a concentration-dependent manner. ROS improved the sensitivity of 3T3-L1 adipocytes to insulin.

CONCLUSIONROS can promote the proliferation of 3T3-L1 preadipocytes, inhibite the proliferation of 3T3-L1 adipocytes, and also, significantly improve insulin resistance induced by dexamethasone.

3T3-L1 Cells ; Adipocytes ; cytology ; Animals ; Cell Proliferation ; drug effects ; Dexamethasone ; pharmacology ; Dose-Response Relationship, Drug ; Insulin Resistance ; Mice ; Oligosaccharides ; administration & dosage ; isolation & purification ; pharmacology ; Plants, Medicinal ; chemistry ; Rehmannia ; chemistry

OBJECTIVE: To study the protective effect of asiaticoside against hyperoxia-induced bronchopulmonary dysplasia in neonatal rats based on the microRNA-155 (miR-155)/suppressor of cytokine signaling-1 (SOCS1) axis. METHODS: Neonatal rats were randomly divided into a control group, a model group, a low-dose asiaticoside group (10 mg/kg), a middle-dose asiaticoside group (25 mg/kg), a high-dose asiaticoside group (50 mg/kg), and a budesonide group (1.5 mg/kg), with 12 rats in each group. All rats except those in the control group were exposed to a high concentration of oxygen for 14 days to establish a neonatal rat model of bronchopulmonary dysplasia. The low-, middle-, and high-dose asiaticoside groups were given asiaticoside at different doses by gavage, and those in the budesonide group were given budesonide aerosol treatment. Hematoxylin and eosin staining was used to observe lung tissue development and measure radial alveolar count (RAC) and mean linear intercept (MLI). Superoxide dismutase (SOD) and malondialdehyde (MDA) detection kits were used to measure the levels of SOD and MDA in lung tissue. ELISA was used to measure the serum levels of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6). Quantitative real-time PCR was used to measure the mRNA expression of miR-155 and SOCS1 in lung tissue. Western blotting was used to measure the protein expression of SOCS1 in lung tissue. RESULTS: Compared with the control group, the model group had the symptoms of bronchopulmonary dysplasia such as a disordered structure of lung tissue, enlargement of alveolar fusion, uneven alveolar septa, enlargement of average alveolar space, and a reduction in alveolar number. The model group also had significant increases in MLI, MDA level in lung tissue, serum levels of IL-6 and TNF-α, and miR-155 level in lung tissue (P<0.05) and significant reductions in RAC, SOD level, and mRNA and protein expression of SOCS1 in lung tissue (P<0.05). Compared with the model group, the low-, middle-, and high-dose asiaticoside groups and the budesonide group had significant improvement in the above symptoms of bronchopulmonary dysplasia, significant reductions in MLI, MDA level in lung tissue, serum levels of IL-6 and TNF-α, and miR-155 level in lung tissue (P<0.05), and significant increases in RAC, SOD level, and mRNA and protein expression of SOCS1 in lung tissue (P<0.05). Asiaticoside improved the above symptoms and indices in a dose-dependent manner. There were no significant differences in the above indices between the high-dose asiaticoside and budesonide groups (P>0.05). CONCLUSIONS Asiaticoside can alleviate inflammation injury induced by hyperoxia in neonatal rats and improve the symptoms of bronchopulmonary dysplasia in a dose-dependent manner, possibly by down-regulating the expression of miR-155 and up-regulating the expression of SOCS1.
Animals ; Animals, Newborn ; Bronchopulmonary Dysplasia ; Hyperoxia ; Lung ; MicroRNAs ; Rats ; Triterpenes

To elucidate the effect of established primary bone marrow stromal layers on the gene transduction of human hematopoietic stem/progenitor cells (HSC/HPC), mononuclear cells (MNC) from adult bone marrow were isolated by centrifugation on Ficoll-Hypaque gradients and plated in stromal culture medium. The cells were incubated until passage 4 to establish primary stromal layers. The HSC/HPC prestimulated by cytokines were transduced by retroviral supernatant containing mdr1 gene in presence of irradiated stroma-contact support. Transduced cells were plated in a colony-forming unit assay with and without vincristine (VCR) to assess the efficiency of transduction. Individual colonies were also analyzed by polymerase chain reaction (PCR) for the presence of provirus. The results showed that the mixed adherent cell layers were formed when adult bone marrow stromal cells were incubated for four to six weeks, mainly being composed of fibroblasts. In the presence of stroma-contact support, the average of gene transduction efficiency in marrow-derived progenitors increased 2.1 to 3.3 folds measured by colony-forming assay and/or PCR, significantly higher than those without support of stroma. It is concluded that the presence of bone marrow stroma support in combination with cytokine facilitates augmenting the extent of retroviral-mediated gene transduction.
Bone Marrow Cells ; physiology ; Genes, MDR ; Hematopoietic Stem Cells ; metabolism ; Humans ; Retroviridae ; genetics ; Stromal Cells ; physiology ; Transduction, Genetic

OBJECTIVETo investigate the clinical features and to identify the DAX-1 gene mutation in a Chinese kindred with X-linked adrenal hypoplasia congenital(AHC).

METHODSClinical data and peripheral blood samples were obtained from the affected individuals and their relatives. The genomic DNA was isolated from whole blood. Four pairs of primers were used to amplify the two exons of the DAX-1 gene, and PCR products were purified and sequenced directly. Sequencing results were compared to the human DAX-1 sequence in the public database.

RESULTSA novel hemizygous frameshift mutation (428delG) in exon 1 of the DAX-1 gene was found in both patients (the index case and his cousin). Some clinical features such as the age of onset were different although these 2 patients carried the same mutation. Three females in the family, including the mothers of the 2 patients and their grandmother were carriers of this mutation. No such mutation was detected in other healthy persons in the family.

CONCLUSIONThe result suggested that X-linked AHC in the kindred was caused by a novel mutation of 428delG in the DAX-1 gene, and the same mutation can give rise to variable phenotypes.

Adolescent ; Adrenal Hyperplasia, Congenital ; genetics ; pathology ; Asian Continental Ancestry Group ; genetics ; Base Sequence ; Child ; DAX-1 Orphan Nuclear Receptor ; DNA-Binding Proteins ; genetics ; Female ; Genetic Diseases, X-Linked ; genetics ; pathology ; Humans ; Male ; Mutation ; Pedigree ; Phenotype ; Receptors, Retinoic Acid ; genetics ; Repressor Proteins ; genetics ; Sequence Analysis, DNA

The identification of genes inducing resistance to anticancer chemotherapeutic agents and their introduction into hematopoietic cells represents a promising approach to overcome bone marrow toxicity, the limiting factor for most high-dose chemotherapy regimens. Because resistance to cyclophosphamide has been correlated with increased levels of expression of the aldehyde-dehydrogenase (ALDH1) gene in tumor cells lines in vitro, this study tested whether ALDH1 overexpression could directly induce cyclophosphamide resistance. Results showed that a retroviral vector was used to transduce full-length human ALDH1 cDNA into human hematopoietic cell line K562 that was then tested for resistance to 4-hydroxycyclophosphamide (4-HC), an active analogue of cyclophosphamide. Overexpression of the ALDH1 gene resulted in a significant increases in cyclophosphamide resistance in transduced K562 cells (50% inhibition concentration, IC50 = 10 micro mol/L). These findings indicate that ALDH1 overexpression is sufficient to induce cyclophosphamide resistance in vitro and provide a basis for testing the efficacy of ALDH1 gene transduction to protect bone marrow cells from high-dose cyclophosphamide in vivo.
Aldehyde Dehydrogenase ; genetics ; Antineoplastic Agents, Alkylating ; pharmacology ; Cell Division ; drug effects ; Cell Survival ; drug effects ; Cyclophosphamide ; analogs & derivatives ; pharmacology ; Dose-Response Relationship, Drug ; Drug Resistance, Neoplasm ; Gene Expression Regulation, Enzymologic ; Genetic Vectors ; genetics ; Humans ; Inhibitory Concentration 50 ; K562 Cells ; drug effects ; enzymology ; metabolism ; Retroviridae ; genetics ; Transfection

This study was aimed to investigate the biological characteristics of osteoblasts and their hematopoietic supportive function by using human fetal osteoblastic cell line 1.19 (hFOBs) as a model. The pluripotency markers (Oct-4, Rex-1, hTERT) of hFOBs were analyzed by RT-PCR, the multilineage differentiation experiments were conducted in vitro. Flow cytometry (FCM) was used to identify the surface markers of hFOBs, and RT-PCR was used to analyze their hematopoietic cytokine expression in comparison with bone marrow mesenchymal stem cell (BM-MSC). The results showed that hFOBs expressed several ESC pluripotency markers including Oct-4 and Rex-1, except hTERT. Moreover, hFOBs could also undergo multilineage differentiation into the mesodermal lineages of adipocytic cell types in addition to its predetermined pathway, the mature osteoblast. Both hFOBs and BM-MSC expressed CD44, CD73 (SH3), CD105 (SH2) and CD90 (Thy1), and lack expression of CD34, CD45, or HLA-DR surface molecules. In addition, both hFOBs and BM-MSC expressed SCF, IL-6, and SDF-1alpha mRNA, but only hFOBs could express GM-CSF and G-CSF. It is concluded that human fetal osteoblastic cell line 1.19 may provide a good model to study the osteoblastic regulation role in hematopoiesis in vitro.
Cell Differentiation ; physiology ; Cell Line ; Fetus ; Hematopoiesis ; physiology ; Humans ; Mesenchymal Stromal Cells ; cytology ; physiology ; Models, Biological ; Osteoblasts ; cytology ; physiology

This study was aimed to investigate the expressions of human telomerase reverse transcriptase (hTERT) and survivin gene in patients with myelodysplastic syndrome (MDS), and to explore their relationship. The expression of hTERT mRNA in bone marrow mononuclear cells (BMMNCs) of 56 patients with MDS and 27 patients with iron deficiency anemia were detected by RT-PCR, the expressions of survivin gene in BMMNCs of 55 patients with MDS and 12 patients with iron deficiency anemia were detected by real-time RT-PCR. The results showed that the expression of hTERT significantly elevated in RA and RAEB patients, as compared with controls (p<0.005). With the disease alleviated, the expression of hTERT decreased and had no significant difference from the controls (p>0.25). There was no significant difference in expression of hTERT between low+int-1 risk group and int-2+high-risk group by IPSS (p>0.50). The expression of survivin gene significantly increased in RA and RAEB patients, as compared with controls (p<0.02, p<0.05). The expression of survivin gene in low+int-1 risk group by IPSS was significantly higher than that in the controls (p<0.02), and there was no significant difference in expression of survivin gene between int-2+high-risk group patients and the controls (p>0.10). It is concluded that the expressions of hTERT and survivin may play a critical role in escaping malignant clone of MDS from apoptosis and acquiring the ability to divide unlimitedly.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Apoptosis ; genetics ; Female ; Humans ; Inhibitor of Apoptosis Proteins ; Male ; Microtubule-Associated Proteins ; genetics ; metabolism ; Middle Aged ; Myelodysplastic Syndromes ; enzymology ; genetics ; RNA, Messenger ; genetics ; metabolism ; Telomerase ; genetics ; metabolism ; Young Adult

This study was aimed to investigate the biological characteristics of osteoblasts from patients with myelodysplastic syndrome (MDS) and their supportive capacity for hematopoiesis in vitro. A two-dimensional culture system was constructed by using osteoblasts derived from human marrow mesenchymal stem cells (MSC); MSCs were isolated from bone marrow of MDS patients and normal individuals and were cultured; the third passage of MSCs were induced into osteoblasts which were treated with mitomycin C and confluenced into a feeder layer. Ficolled bone marrow mononuclear cells were obtained from normal individuals and seeded into the two-dimensional culture system to culture in vitro without exogenous cytokines. By using colony-forming assay, the ability of the two-dimensional system to culture HPCs was observed. The cytokine expression of osteoblasts from MDS patient bone marrows in mRNA level was detected by RT-PCR and was compared with human osteoblast cell line hFOB1.19. The results showed that the osteoblasts from MDS patients could support short-term survival of GM-CFC in condition without exogenous cytokines, that is, osteoblasts played a crucial role in regulation of HPC growth. The results of RT-PCR clearly demonstrated that the osteoblast cell line hFOB1.19 expressed SCF, IL-6, SDF-1alpha, G-CSF and GM-CSF. The same expression patterns of above cytokines were also seen in osteoblasts derived from BM-MSCs of MDS patients and normal individuals, but these cells did not express GM-CSF. It is concluded that the biological characteristics of osteoblasts from bone marrow of MDS patients are generally not different from those of osteoblasts from normal bone marrow. Both of them can support GM -CFC to form colonies in vitro, it may be associated with expressing important related cytokines by osteoblasts.
Cytokines ; metabolism ; Granulocyte-Macrophage Colony-Stimulating Factor ; metabolism ; Granulocyte-Macrophage Progenitor Cells ; cytology ; Hematopoietic Stem Cells ; cytology ; Humans ; Interleukin-6 ; metabolism ; Myelodysplastic Syndromes ; metabolism ; pathology ; Osteoblasts ; metabolism ; physiology ; RNA, Messenger ; metabolism ; Stem Cell Factor ; metabolism

Aged ; Humans ; Hypercalcemia ; complications ; Liver Neoplasms ; complications ; Lymphoma ; complications ; Male

Aim To observe the effect of epidurally application of osthole on the model of nucleus pulposusinduced inflammatory radicular pain and the expression of p38 MAPK signaling related pathway in the spinal dorsal horn of rats.Methods The model of radicular pain was generated by putting nucleus pulposus to the L5 dorsal root ganglion (DRG).50％ MWT was measured using Von Frey filaments to calculate mechanical pain threshold before and after operation.50 μL of 20 g · L-1 osthole was administered epidurally in group Ost and 50 μL of 100 mL · L-1 DMSO in group DMSO at postoperative day (POD).The expression of phosphorylated p38 (p-p38),IL-18 and IL-18R in the lumbar spinal dorsal horn was detected by Western blot.IL-18 mRNA was assessed by real-time PCR.Results The mechanical pain threshold significantly decreased after operation (P ＜ 0.05),while the expression of protein p-p38 MAPK,IL-18,IL-18R and IL-18 mRNA was significantly different.Compared with DMSO group,50％ MWT was significantly increased and accompanied with the decrease of protein p-p38,IL-18,IL-lgR and IL-18 mRNA in Ost group after drug administration (P ＜ 0.05).The correlation analysis between protein concentration of p38 MAPK and IL-18 mRNA showed that the Spearman correlation coefficient was 0.9 (P ＜ 0.05).Conclusion p-p38 and IL-18 of spinal dorsal horn participate in the rat model with inflammatory radicular pain induced by nucleus pulposus,and IL-18R plays a role in maintenance of the pain.Osthole administered epidurally in the early stage of pain could alleviate the pain for a long time,which may be related with inhibiting p38 MAPK signaling related pathways.