Objective To investigate the effect of selenium on proliferation and apoptosis of chondrocytes of articular cartilage cultured in vitro in Kaschin-Beck disease(KBD) patients and normal person, to explore the role of selenium in control of KBD, and to provide evidence for selenium's effect on the growth of normal cartilage cells. Methods The articular cartilage samples of grade Ⅱ and Ⅲ KBD patients were selected according to the national "Clinical Diagnosis of KBD" (GB 16003-1995). Chondrocytes of 5 KBD and 5 non-endemic normal accidentswere separated and cultured in vitro. KBD group and control group were given different doses of selenium (0,0.0125,0.0250,0.0500,0.1000,0.2500,0.5000,1.0000 mg/L, respectively). Methyl thiazolyl tetrazolium (MTT),flow cytometric analysis, and immunocytochemical staining were used to observe the effect of selenium on cell growth and apoptosis in KBD and normal persons. Results MTT results showed that the cell proliferation rate in each dosage group of the control group at the 6th day(0.086 ± 0.025,0.077 ± 0.012,0.073 ± 0.027,0.071 ± 0.017,0.058 ± 0.028,0.052 ± 0.028 and 0.046 ± 0.037) was significantly lower than that of 0 mg/L group(0.138 ± 0.026,all P ＜ 0.05);the average cell proliferation rate was negative( - 0.001 ± 0.001, - 0.003 ± 0.000, - 0.003 ± 0.001and - 0.004 ± 0.001 ) in 0.1000 - 1.0000 mg/L dose group, which was significantly lower than that of the 0 mg/L group(0.025 ± 0.003, all P ＜ 0.05);compared with 0 mg/L group(0. 115 ± 0.011), the KBD 0.2500 mg/L dose group promoted cell proliferation(0.128 ± 0.037, P ＜ 0.05), the KBD 1.0000 mg/L dose group inhibited cell growth (0.071 ± 0.019, P ＜ 0.05). The apoptotic rate of 0.0500 - 1.0000 mg/L dose control group [ (18.88 ± 0.02)%,(17.58 ± 0.01)%, (17.09 ± 0.04)%, (56.00 ± 0.02)%, (57.85 ± 0.03)% ] were higher than that of the 0 mg/L group[(13.51 ± 0.01)%, all P ＜ 0.05];compared with 0 mg/L group[(25.84 ± 0.02)%], the apoptotic rate in KBD 0.0250 - 0.2500 mg/L dose group [ ( 13.69 ± 0.02) %, ( 15.96 ± 0.03 ) %, ( 16.68 ± 0.03 ) %, ( 16.67 ± 0.02) % ]were lower, and the apoptotic rate in 0.5000, 1.0000 mg/L dose group [ (59.58 ± 0.03)%, (73.48 ± 0.04)% ] were significantly higher(all P ＜ 0.05). The Fas expression in KBD 0.0500 - 0.2500 mg/L dose groups[ (41.2 ± 1.5)%,(40.3 ± 2.0)%, (50.2 ± 2.5)%] were lower than those of the same dose control group with selenium intervention [(52.4 ± 1.0)%, (67.2 ± 4.0)%, (75.1 ± 5.0)%, all P ＜ 0.05], the caspase-3 expression in KBD 0.0500,0.1000 mg/L dose groups[ (40.8 ± 1.1 )%, (45.1 ± 2.1 )%] were lower than those of the same dose control group with selenium intervention[ (68.0 ± 3.0)%, (70.6 ± 3.5)%, all P ＜ 0.05 ]. Conclusions Appropriate dose of selenium supplementation (0.1000 - 0.2500 mg/L) could promote the growth of KBD chondrocyte, decrease cell apoptosis,but have a damage when the dose of selenium ＞ 0.5000 mg/L;doses of selenium that could promote the growth of KBD chondrocyte does not mean to promote the growth of normal cartilage cells in vivo.

Objective To investigate the treatment effects of operation and nerve growth factor on adult multisegmental cervical spinal cord injury without fracture dislocation.Methods Sixty-eight patients with multiple segmental cervical spinal cord injury without fracture dislocation,admitted to our hospital from January 2004 to May 2011,were chosen in our study; according to the will of the patients,18 patients received conservative treatment (group A),25 patients were treated by posterior single open-door laminoplasty (group B) and the other 25 patients were treated with posterior single open-door laminoplasty combined with nerve growth factor (group C,once daily for 4 weeks); their clinical data were retrospectively analyzed.Follow up was performed at 3,6 and 12 months after the treatments;Japanese Orthopaedic Association (JOA) scale was employed to evaluate the clinical efficacy.Results Three,6,12 months after the treatments,the JOA scale scores were statistically different among the three groups (P＜0.05); the scores in group B and C were significantly higher than those in group A at all time points (P＜0.05); 6 and 12 months after the treatmemts,the JOA scale scores in group C were significantly higher than those in group B (P＜0.05).Conclusion To patients with multisegmental cervical spinal cord injury without fracture dislocation,conservative treatment can make the spinal cord function partially restored,but the effect is limited; exogenous nerve growth factor has good repairing effect on spinal cord injury.

OBJECTIVETo evaluate the specific killing effects of combination of recombinant adenovirus mediated double suicide gene driven by KDR promoter and survivin antisense oligonucleotide(ASODN) on colorectal cancer cells and vascular endothelial cells.

METHODSThe 293 packaging cells were transfected with the plasmids of pAdEasy-CDglyTK and the recombinant adenovirus were generated. The KDR expressive cells of SW620, ECV304 were infected with adenovirus, meanwhile survivinASODN was transferred into the same cells. The infection rate of adenovirus and transfection efficiency of survivinASODN were observed and the expression of CDglyTK was detected by RT-PCR. The expression of survivin was measured by Western blot. The killing effects and bystander effects on SW620, ECV304 were examined through MTT method.

RESULTSThe cells which were infected with the adenovirus mediated double suicide gene could be transfected with the survivin ASODN and the infection rate was not affected as well as the transfection efficiency. The high expression of CDglyTK gene was found in SW620, ECV304 cells infected with recombinant adenovirus and survivin ASODN decreased the survivin protein level. The survival rate of gene therapy group was significantly lower than that of negative group. The combination of survivin ASODN and AdKDR-CDglyTK gene therapy showed significantly lower survival rate of SW620 and ECV304 cells as compared with the AdKDR-CDglyTK or survivin ASODN used alone (P<0.05). The survival rate was slightly lower in GCV 100 microg/ml, 5-FC 2000 microg/ml than that AdKDR-CDglyTK used alone (P>0.05). The combined therapy of AdKDR-CDglyTK and survivin ASODN showed synergistic killing efficacy and more significant bystander effects.

CONCLUSIONThe combined gene therapy of AdKDR-CDglyTK system and survivin ASODN has stronger specific killing effects on colorectal cancer cells and vein endothelial cells.

Adenoviridae ; genetics ; Cell Line, Tumor ; Colorectal Neoplasms ; genetics ; metabolism ; Endothelial Cells ; metabolism ; Genes, Transgenic, Suicide ; genetics ; Humans ; Inhibitor of Apoptosis Proteins ; Microtubule-Associated Proteins ; genetics ; Oligonucleotides, Antisense ; genetics ; Receptors, Vascular Endothelial Growth Factor ; genetics ; Transcription Initiation Site

Objective To understand the effect of hyaluronic acid (HA) on the proliferation and apoptosis of chondrocytes cultured in vitro with Kashin-Beck disease(KBD) to provide the experimental evidences for treating KBD diseases with HA. Methods The articular cartilage samples collected from KBD patients were selected according to Diagnosis for Kaschin-Beck Disease(GB 16003-1995). And the normal cartilage samples were collected from victims of incidence (control). Chandrocytes were separated and cultured in vitro. Then varying dosages of HA were administered to chondrocytes and individed into 0,100,500 mg/L group, according to HA doages. The effect of HA on the proliferation and apoptosis of chondrocytes cultured/n vitro both KBD and the controls were investigated by methyl thiazolyl tetrazolium(MTT), Annexin V/PI staining on 2~(nd), 4~(th), 6~(th) day. Results In the control group, 500 mg/L group(0.140 ± 0.049) promoted chondrocyte proliferation significantly than 0 mg/L group (0.116 ± 0.021 ) at the 4~(th) day(P < 0.05), similar phenomenon was observed in KBD group in the 6~(th) day between 500 and 0 mg/L group(0.179 ± 0.081,0.128 ± 0.017, P< 0.05). In the KBD group, compared with 0 mg/L (12.860 ± 2.159), both 100 and 500 mg/L( 10.458 ± 1.143,7.877 ± 1.346) inhibited chondrocyte apoptosis rate (P < 0.05). In control, apoptosis rate of 500 mg/L group(4.045 ± 1.204) descreased compared with 0 mg/L group (7.128 ± 1.244, P < 0.05). Conclusion HA can promote the proliferation and inhibit the apoptosis of KBD chondrocytes cultured in vitro, and 500 mg/L HA play more effective role than that of 100 mg/L in promoting proliferation and inhibiting poptosis.

Oral epidemic diseases of exposure personnel in long-term low-dose radiation yet have rarely been studied. Referred to WHO oral health survey method and symptom grading standard, data of 341 exposure persons in long-term low-dose radiation including α particle, β particle, and γ rays, etc., were collected from one camp in China in 2011 with cluster sampling and analyzed? with Foxpro 6.0 and SPSS 16.0 software. The exposure persons worked in low-dose radiation for a long time aged between 23 and 56, whose average age were 27.1 years old.In addition, their lengths of service were from 2 to 34 years (average 7.9 years) and average exposure time was 8 hours a day each year for more than three months. Average annual radiation dose equivalent was from 1.8 to 16.5 mSv (average 7.3 mSv). Total radiation dose equivalent was from 3.8 to 425.0 mSv (average 97.3 mSv).
Adult ; Health Personnel ; Humans ; Middle Aged ; Occupational Exposure ; adverse effects ; Radiation Dosage ; Radiation Injuries ; epidemiology ; Stomatitis ; epidemiology

OBJECTIVETo evaluate the inhibitory effects of survivin antisense oligonucleotide (survivin-ASODN) mediated by polyamidoamine dendrimer (PAMAM) against the growth of subcutaneously transplanted colorectal cancer in nude mice.

METHODSNude mouse models bearing colorectal cancer was established by subcutaneous injection of SW620 cells. Survivin- OSADN (300 microg/L) was mixed with 4.06 microg/L PAMAM or liposome to prepare two transfection complexes, and their morphologies were observed by transmission electron microscope. The particle size of the prepared complexes was determined by laser particle size analyzer, and the zeta potential was measured. The encapsulation efficiency and the DNA release rate in vitro were determined by ultraviolet spectrophotometer. The transfection complexes were then directly injected into the xenografts of the tumor-bearing nude mice. The tumor volume changes were observed, and the expression of survivin in the transplanted tumor was measured by Western blotting.

RESULTSThe PAMAM-survivin-ASODN complex had a significantly smaller diameter and greater zeta potential than liposome-survivin-ASODN (P<0.01 and 0.05, respectively). The encapsulation efficiency was comparable between the two complexes. In in vitro condition, PAMAM-survivin-ASODN allowed sustained survivin-ASODN release for as long as 14 days, as compared with the 5 days for the liposome complex. After injection into the tumor xenografts, PAMAM-survivin- ASODN resulted in significantly lower expression of survivin protein in the transplanted tumors (P<0.05), and also in significantly greater reduction of the tumor volume than the liposome complex (P<0.05).

CONCLUSIONPAMAM can effectively deliver survivin-ASODN into transplanted colorectal tumor cells to reduce the expression of survivin and inhibit the tumor growth.

Animals ; Cell Proliferation ; drug effects ; Colorectal Neoplasms ; pathology ; Dendrimers ; Humans ; Inhibitor of Apoptosis Proteins ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Microtubule-Associated Proteins ; genetics ; pharmacology ; Neoplasm Transplantation ; Oligonucleotides, Antisense ; pharmacology ; Polyamines ; pharmacology ; Repressor Proteins ; Tumor Cells, Cultured

To analyze the impact of hepatitis B virus (HBV) infection on liver function of patients after hematopoietic stem cell transplantation (HSCT), the transplantation outcome of 48 patients infected with HBV prior to transplantation among 185 patients received HSCT was investigated retrospectively. The results showed that during a follow-up for 6 months after HSCT, the alanine aminotransferase (ALT) peak average values of the patients with HBsAg(+), HBsAb(+) and control groups were (281.6 ± 414.6), (95.4 ± 79.9) and (65.1 ± 44.2) U/L, respectively. The incidences of abnormal liver function of the patients with HBsAg(+), HBsAb(+) and control groups were 61.54%, 40.00% and 30.23% respectively. There were no significant differences between any two groups (P > 0.05). The lethality of those patients at late period after transplantation was not related to HBV infection. The hepatocirrhosis and hepatocarcinoma caused by HBV infection have not become major problems in long-term survivors. It is concluded that in HBsAg(+) patients received HSCT, the damage of liver function is more severe than control group, possibly increasing the development of abnormal liver function. The measures against the liver function damage should be taken. The prophylactic administration of ganciclovir for virus may be effective to prevent the activation of HBV.
Adolescent ; Adult ; Child ; Female ; Hematopoietic Stem Cell Transplantation ; adverse effects ; Hepatic Veno-Occlusive Disease ; etiology ; prevention & control ; Hepatitis B ; physiopathology ; Hepatitis B virus ; Humans ; Liver ; physiopathology ; virology ; Liver Function Tests ; Male ; Middle Aged ; Retrospective Studies ; Young Adult

OBJECTIVETo evaluate the selectively killing effects of combination of adenovirus mediated double suicide gene driven by kinase-domain insert containing receptor (KDR) promoter and survivin antisense oligonucleotide on breast tumor cells and vein endothelial cells.

METHODSHuman embryonal kidney cells 293 were transfected with the plasmids of pAdEasy-KDR-CDglyTK and the adenovirus was generated. The KDR expressive cells of MCF-7, ECV304 were infected by adenovirus and survivin ASODN was transferred into the same cells meanwhile. The infection rates of adenovirus and transfection efficiency of survivin ASODN were observed and the expression of CDglyTK was detected by RT-PCR. The expression of survivin was measured by Western blot. The killing effects and bystander effects on cells were assessed by MTT assay.

RESULTSThe cells infected by the adenovirus mediated double suicide gene could be transfected with the survivin ASODN and the infection rate was not affected as well as the transfection rate. The high expression of CDglyTK gene was found in the two kinds of cells and survivin ASODN decreased the survivin protein level. When survivin ASODN was transferred into MCF-7, ECV304 cells, the survival rates were 56.4% +/- 3.8% and 55.9% +/- 3.6% respectively. The combination of survivin ASODN and AdKDR-CDglyTK gene therapy showed significantly lower survival rate comparing with using each treatment alone (P < 0.05) and the survival rate decreased gradually with the increasing of the concentration of GCV and 5-FC. But the survival rate for combined gene therapy group was slightly lower in GCV 100 microg/ml, 5-FC 2000 microg/ml than that of AdKDR-CDglyTK group (P > 0.05). The combination of survivin ASODN and AdKDR-CDglyTK therapy showed synergistic killing efficacy and more significant bystander effects.

CONCLUSIONThe combined therapy with AdKDR-CDglyTK system and survivin ASODN shows obvious killing effects on breast tumor cells and vein endothelial cells.

Adenoviridae ; genetics ; Breast Neoplasms ; genetics ; metabolism ; pathology ; Cell Line ; Cell Line, Tumor ; Cell Survival ; Endothelial Cells ; metabolism ; pathology ; Female ; Genes, Transgenic, Suicide ; genetics ; Genetic Therapy ; methods ; Genetic Vectors ; Humans ; Inhibitor of Apoptosis Proteins ; Microtubule-Associated Proteins ; genetics ; Neoplasm Proteins ; genetics ; Oligonucleotides, Antisense ; genetics ; Plasmids ; Promoter Regions, Genetic ; Receptors, Vascular Endothelial Growth Factor ; genetics ; Transfection

OBJECTIVETo set up a platform for phenotype-based primary screening of drug candidates promoting neuronal subtype differentiation in embryonic stem cells (ES) with light microscope.

METHODSHanging drop culture 4-/4+ method was employed to harvest the cells around embryoid body (EB) at differentiation endpoint. Morphological evaluation for neuron-like cells was performed with light microscope. Axons for more than three times of the length of the cell body were considered as neuron-like cells. The compound(s) that promote neuron-like cells was further evaluated. Icariin (ICA, 10(-6)mol/L) and Isobavachin (IBA, 10(-7)mol/L) were selected to screen the differentiation-promoting activity on ES cells. Immunofluorescence staining with specific antibodies (ChAT, GABA) was used to evaluate the neuron subtypes.

RESULTSThe cells treated with IBA showed neuron-like phenotype, but the cells treated with ICA did not exhibit the morphological changes. ES cells treated with IBA was further confirmed to be cholinergic and GABAergic neurons.

CONCLUSIONPhenotypic screening with light microscope for molecules promoting neuronal differentiation is an effective method with advantages of less labor and material consuming and time saving, and false-positive results derived from immunofluorescence can be avoided. The method confirms that IBA is able to facilitate ES cells differentiating into neuronal cells, including cholinergic neurons and GABAergic neurons.

Animals ; Cell Differentiation ; drug effects ; physiology ; Cell Line ; Drug Evaluation, Preclinical ; methods ; Embryoid Bodies ; cytology ; Embryonic Stem Cells ; cytology ; Mice ; Nerve Regeneration ; drug effects ; Neurons ; cytology ; Phenotype

Objective To explore the protection and molecular mechanism of histone deacetylase inhibitors (HDACIs) on the spleen of rats with hemorrhagic shock. Methods A total of 60 SPF male SD rats were selected for the modeling of severe hemorrhagic shock using the method of arterial and venous cannulation with the time-divided bleeding. The measurement of mean arterial blood pressure and blood lactic acid was used to verify the modeling. The modeled rats were randomly divided into shock group, shock + suberoylanilide hydroxamic acid (SAHA) group, shock + autogenous transfusion group and shock + SAHA + autogenous transfusion group. Three hours after the treatment, the spleen of rats was collected and TUNEL method was employed to detect the apoptosis of spleen cells in each group. The statistical analysis was performed. Afterwards, real-time PCR and western blot were employed to detect the expression of BCL-2, BAX and caspass3 in the spleen of rats in each group. Results A total of 53 rats had successful modeling of severe hemorrhagic shock, with success rate of 88%. Cell apoptosis in the severe hemorrhagic model group was the most serious. After the intervention of HDACIs and the autogenous transfusion, the tissue injury was a bit recovered. Cell apoptosis was least in the shock + SAHA + autogenous transfusion group (P < 0.05). After the intervention of HDACIs and the autogenous transfusion, the relative expression of BCL-2 was significantly increased (P < 0.05), with highest relative expression of BCL-2 in shock + SAHA + autogenous transfusion group (P < 0.05). After the intervention of HDACIs and the autogenous transfusion, the relative expression of BAX was significantly decreased (P < 0.05), with lowest relative expression of BAX in the intervention group of single HDACIs. The change in the expression of caspass3 was similar to BAX, namely the relative expression of caspass3 was significantly decreased after the intervention of HDACIs and the autogenous transfusion (P < 0.05). Conclusions HDACIs and autogenous transfusion can all protect the spleen injury because of the severe hemorrhagic shock. Its molecular mechanism may be related to the regulation on the expression of BCL-2/BAX and caspass3, which may affect the apoptosis process of cells.