Objective To investigate the effect of IGF-1 on the TGF-β3 induced chondrogenesis of MSCs encapsulated in alginate beads and its application in cartilage tissue engineering.Methods MSC chondrogenesis in alginate beads was induced by TGF-β3 and/or IGF-1.Collagen type Ⅱ,aggrecan and Sox-9 expression was evaluated by immunostaining,RT-PCR and Western blot,respectively.Scanning electron microscope and laser confocal microscope were used to observe the differentiated chondrocytes when cultured on the chitosan-based scaffold.Results TGF-β3 with IGF-1 induced MSCs in alginate beads to express the higher level of collagen type Ⅱ,aggrecan and Sox-9 than any other growth factor alone (P＜0.05).The correlation coefficient between Sox9 and collagen type Ⅱ or aggrecan was 0.95 and 0.91,respectively.The chitosan-based scaffold supported the cell's adhesion,migration and proliferation.Conlusion IGF-1 enhances the TGF-β3-induced MSC chondrogenesis via upregulating Sox9 expression.The chitosan-based scaffold is biocompatible with the differentiated chondrocytes.

Aged ; Aged, 80 and over ; Anthracosis ; blood ; C-Reactive Protein ; analysis ; metabolism ; Cross Infection ; diagnosis ; therapy ; Humans ; Male ; Middle Aged ; Pneumonia ; blood ; Serum ; chemistry

Adolescent ; Adult ; Drug Industry ; Hematologic Tests ; Humans ; Middle Aged ; Occupational Exposure ; Platinum Compounds ; blood ; Workplace ; Young Adult

Cells, Cultured ; Coal ; toxicity ; Dust ; Humans ; In Vitro Techniques ; Mutagenicity Tests ; Mutagens ; toxicity ; Mutation ; drug effects ; Salmonella typhimurium ; drug effects ; genetics ; Sister Chromatid Exchange ; drug effects

Objective To analyze the current situation of institutional care for people with disabilities in Shanghai, China. Methods Sec-ondary data were collected from the synthetical information platform of Shanghai Disabled Persons' Federation, including data about the res-idential institutions and people with disabilities living in the institutions from 2004 to 2015. Results The number of residential institutions and people with disabilities showed an increasing tendency from 2004 to 2015. At the end of 2015, there was 368 residential institutions in Shanghai, providing institutional care for 5821 people with disabilities. People in the institutions were mainly with intelligence disability and mental disability, and mainly in 35 to 59 years old. Conclusion The institutional care for people with disabilities was generally in a good condition in Shanghai and met people's needs.

OBJECTIVETo investigate and compare the effects and mechanisms of three functional parts of Dahuang Zhechong Pill (DHZCP), including drugs with the function of removing blood stasis and promoting blood circulation (FP-I), drugs with the function of expelling heat and moistening dryness (FP-II), and drugs with the function of nourishing yin and replenishing blood (FP-III) of DHZCP, on platelet-derived growth factor (PDGF)-stimulated vascular smooth muscle cells (VSMCs) proliferation with the method of serum pharmacology.

METHODSVSMCs proliferation of rat was assayed by measuring the cell viability with the 3-(4, 5-dimethylthiazol-2yl)-2, 5-diphenyltetrazolium bromide (MTT) method. DNA synthesis in VSMCs was examined by detecting 5'-bromo-2'-deoxyuridine incorporation with the immunocytochemical method. Cycle of VSMCs was evaluated with flow cytometry. Expression of cyclin D1, p27, PKCα, and phosphorylated extracellular signal regulated kinase 1/2 (ERK1/2) was quantified by the Western blotting method.

RESULTSThe FP-I and FP-III containing serum was capable of inhibiting PDGF-stimulated proliferation and DNA synthesis of VSMCs, arrested VSMCs in G phase, downregulated cyclin D1, and upregulated p27 expression (P <0.01 or P <0.05). The FP-I and FP-III containing serum also inhibited the PDGF-induced phosphorylation of tyrosine of ERK1/2 and PKCα expression (P <0.01 or P <0.05).

CONCLUSIONSFP-I and FP-III of DHZCP are able to inhibit VSMCs proliferation via interrupting PKCα-ERK1/2 signaling, modulating the expression of cell cycle proteins to result in arresting the cells in G phase. The inhibitory effect is mainly related to the function of removing blood stasis and promoting blood circulation, slightly to the function of nourishing yin and replenishing blood, but not to the function of expelling heat and moistening dryness.

Animals ; Cell Cycle ; drug effects ; Cell Proliferation ; drug effects ; Cyclin D1 ; metabolism ; Cyclin-Dependent Kinase Inhibitor p27 ; metabolism ; DNA ; biosynthesis ; Drugs, Chinese Herbal ; pharmacology ; Enzyme Activation ; drug effects ; Extracellular Signal-Regulated MAP Kinases ; metabolism ; MAP Kinase Signaling System ; drug effects ; Male ; Muscle, Smooth, Vascular ; cytology ; Myocytes, Smooth Muscle ; cytology ; drug effects ; enzymology ; Platelet-Derived Growth Factor ; pharmacology ; Protein Kinase C-alpha ; metabolism ; Rats ; Rats, Sprague-Dawley ; Serum ; metabolism

OBJECTIVETo investigate effects of dahuang zhechong pill ( DHZCP) on the cell cycle and the related signal pathways in vascular smooth muscle cells (VSMCs) stimulated by platelet-derived growth factor (PDGF) with the method of serum pharmacology.

METHODSDNA synthesis in VSMCs was examined by detecting 5'-bromo-2'-deoxyuridine incorporation with the immunocytochemical method. The cycle of VSMCs was evaluated with flow cytometry. Expressions of cyclin D1, p27, protein kinase Cα (PKCα), and phosphorylated extracellular signal regulated kinase 1/2 (ERK1/2) were quantified by Western blot method.

RESULTSDHZCP containing serum significantly inhibited DNA synthesis of PDGF-stimulated VSMCs, arrested the cells in G G(1) phase, modulated the protein expressions of cyclin D D(1) and p27, and suppressed the activation of PKCα and ERK1/2.

CONCLUSIONDHZCP containing serum inhibits VSMCs proliferation via modulating the expressions of cell cycle proteins to arrest the cell in G G(1) phase, which is attributed to, at least in part, suppressing PKCα-ERK1/2 signaling in VSMCs.

Animals ; Aorta, Thoracic ; cytology ; Blood Proteins ; pharmacology ; Cell Proliferation ; drug effects ; Cells, Cultured ; Cyclin D1 ; metabolism ; Cyclin-Dependent Kinase Inhibitor p27 ; metabolism ; DNA ; biosynthesis ; Drugs, Chinese Herbal ; pharmacology ; G1 Phase ; drug effects ; physiology ; MAP Kinase Signaling System ; physiology ; Male ; Muscle, Smooth, Vascular ; cytology ; drug effects ; enzymology ; Platelet-Derived Growth Factor ; pharmacology ; Protein Kinase C-alpha ; metabolism ; Rats ; Rats, Sprague-Dawley

Adult ; Aged ; Aged, 80 and over ; Coal Mining ; Humans ; Lung Neoplasms ; complications ; microbiology ; Male ; Methicillin Resistance ; Microbial Sensitivity Tests ; Middle Aged ; Pneumoconiosis ; complications ; microbiology ; Staphylococcus aureus ; drug effects ; isolation & purification

[ ABSTRACT] AIM:To investigate the effects of microRNA-378*( miR-378*) on the survival and apoptosis of human mesenchymal stem cells ( hMSCs ) .METHODS: The expression of miR-378* was determined by microRNA arrays and quantitative real-time PCR ( qRT-PCR) .H2 O2 was used to induce hMSCs apoptosis.By transfection of miR-378*mimic or inhibitor, we up-regulated or down-regulated miR-378* expression in hMSCs.The effect of miR-378*and connective tissue growth factor ( CTGF) on hMSC survival and apoptosis were detected by MTT, LDH, caspase-3/7 and TUNEL assays.RESULTS:The expression of miR-378*was up-regulated in the old hMSCs compared with the young hMSCs.H2 O2 increased the expression of miR-378*, decreased the expression of CTGF.Up-regulation of miR-378*re-sulted in increasing apoptosis and decreasing survival of hMSCs.Conversely, down-regulation of miR-378*resulted in de-creasing cell apoptosis and increasing survival.The regulation of miR-378*on hMSC apoptosis and survival was attenuated by inhibiting the expression of miR-378* and CTGF together.Direct repression of CTGF expression inhibited the hMSC survival and increased apoptosis.CONCLUSION:miR-378*enhances apoptosis of hMSCs by repressing the expression of CTGF.

BACKGROUND:The adhesion between muscle tendon and surrounding tissue after tendon restoration is one hot topic in clinic.
OBJECTIVE:To construct a deep flexor tendon transection model in the third toe of female Leghorn chicken and to explore the effect of peritenon transplantation on the prevention of tendon adhesions.
METHODS:After the transection models were successful y established, the third toe of left claw was taken as experimental group A. The transected tendon was sutured, the tendon anastomosis end was wrapped with the peritenon of the deep flexor tendon from the ipsilateral fourth toe (experimental group B). The third toe of right claw served as control group A, the transfected tendon was sutured and restored with the peritenon. The fourth toe of right claw was taken as control group B. Gross observation and histological observation of the tendon were performed.
RESULTS AND CONCLUSION:At 28 days postoperatively, gross observation and histological observation of Leghorn chicken were performed and compared using the Kruskal-Wal isH and Nemenyi test, respectively. The results showed that, the therapeutic effect was better in experimental group A than in control group A (P<0.05), but slightly poorer compared with control group B and experimental group B (P<0.05). The postoperative effect was better in experimental group B than in control group A (P<0.05) and showed no significant difference between experimental group B and control group B (P>0.05). The flexor function was evaluated and compared with the least significant difference t-test. The results showed that the postoperative effect was better in experimental group A than in control group A (P<0.05), but slightly poorer compared with control group B and experimental group B (P<0.05). The postoperative effect was better in experimental group B than in control group A (P<0.05) and showed no significant difference compared with control group B (P>0.05). Peritenon transplantation can effectively prevent tendon adhesions and has little impact on normal tendon sliding.