OBJECTIVE: To explore the inhibitory effect and its mechanism of platycodin D (PD) on human colonic cancer SW620 cell proliferation. METHODS: The inhibitory effect of PD on SW620 cell proliferation was analyzed by MTT assay, while the effect of PD on cell cycle distribution and apoptosis were evaluated by flow cytometry. The effect of PD on expression of cyclin and ap-optosis associated proteins were detected by Western blot. RESULTS: The cell proliferation of human colonic cancer SW620 cell was inhibited by PD in a dose-dependent manner. After cells were treated with PD(15, 20 μmol · L-1) for 24 h, the proportions of cells in G0/G1 phase were (72.83±5.26)% and (76.82±5.83)% respectively, while the control group cells was (56.78±4.92)%, which suggested PD could block SW620 in the G, phase compared with the control group cells. Furthermore, the expressions of cyclinD1, c-myc and GDK6 were reduced obviously. Compared with the control group cells, the apoptotic rates were increased [(19.5±5.1)%, (35.8±5.3)% and (43.8±4.0)% respectively] after cells were treated by PD (10, 15, 20 μmol · L-1) for 48 h. The expression of procaspase 3 and PARP with proenzyme form were reduced. CONCLUSION: PD could inhibit the growth of colon cancer cell by blocking SW620 in the G, phase through regulating the expression of cyclinD1, c-myc and CDK6 and thus inducing the apoptosis by cell cycle arrest.

Objective To explore the initial clinical and imaging characteristics of basal ganglia germinoma in children.Methods Four patients with basal ganglia germinoma were reported.Their clinical features,laboratory findings,radiological manifestations,treatment and outcome were analyzed.They recieved radiation therapy and chemotherapy after diagnosis.All patients were clinically diagnosed,according to the results of low-dose cranial irradiation.The outcomes were followed up for 2 years.Results All patients were male and school-aged(9-13 years) children.The course of the disease ranged from 5 to 13 months.All patients were presented with slowly progressive hemiparesis,and 2 cases of them were presented with cognitive decline and psychosis.Seizure occurred in 2 patients.The serum ?-human chorionic gonadotropin(?-hcG) level was significantly increased in 2 patients(30.16 IU/L and 77.85 IU/L,respectively),and mildly elevated in 1 patient(4.29 IU/L),while serum ?-hcG level in another case was within normal control range.MRI demonstrated mildly high intensity in the left or right basal ganglia on T1-weighted and T2-weighted images without remarkable occupying lesion.Ipsilateral hemiatrophy of the hemisphere and midbrain was also noted.Inhomogeneous Gd-DTPA enhancement was observed.All patients had been treated with radiation therapy and chemotherapy.During 2 years follow up,significant improvement was observed in all patients after therapy,imaging lesions disappeared and the elevated ?-hcG level of those elevated before therapy returned to normal.Conclusions Early diagnosis and treatment for basal ganglia germinoma are critically important to improve the prognosis.In young male patients with progressive hamiparesis,basal ganglia germinoma should be considered for differentiation,if abnormal high intensity signals in basal ganglia on T1-weighted and T2-weighted image with ipsilateral hemiatrophy of the hemisphere are demonstrated on MRI,even without occupying effect.

Anticonvulsants ; therapeutic use ; Child ; Child, Preschool ; Electroencephalography ; Epilepsies, Partial ; diagnosis ; drug therapy ; Humans ; Infant ; Occipital Lobe ; pathology ; Prognosis

Humans ; Infant ; Neuroaxonal Dystrophies ; diagnosis

Objective To investigate the genetic association between NF-E2-related factor 2 (Nrf2) gene polymorphism and Alzheimer's disease (AD) in the Han descent population of Shaanxi province.Methods 382 AD patients from January 2015 to December 2016 were recruited to participate in the study.According to age of onset,they were divided into the early-onset Alzheimer's disease (EOAD) group (116 cases) and the late-onset Alzheimer's disease (LOAD) group (266 cases).120 healthy volunteers without AD were recruited to participate in the study.Genotype was determined by polymerase chain reaction combined with DNA direct sequencing technique for the polymorphism of the Nrf2 gene.Results The genotype and allele distribution of rs35652124 and rs6721961 polymorphism were significantly different between the EOAD group and control group(P＜0.05).There was no significant difference of genotype and allele distribution of three Nrf2 gene single nucleotide polymorphisms (SNPs) between the LOAD group and control group (P＞ 0.05).For EOAD patients,age of onset was significantly different between different genotype of rs35652124 and rs6721961 (P＜0.05).However,there was no significant difference of age of onset in LOAD group(P＞0.05).Conclusion Polymorphism of the Nrf2 gene may associate with the risk of AD,and affect disease progression.

Objective To investigate the relationship of PI3K/Akt signaling pathway with the activation of hepatic stellate cells (HSC) and its role in radiation-induced hepatic fibrosis.Methods HSC was treated with 6 MV X-ray irradiation (IR) together with the inhibitor of PI3K/Akt signaling pathway.The cells were divided into inhibitor group,10 Gy IR group,10 Gy + inhibitor group,20 Gy IR group,an 20 Gy + inhibitor group and blank control group.Then cell apoptosis rate was detected,the expression of transforming growth factor β1 (TGF-β1) in cell supernatant and the mRNA expressions of α-smooth muscle actin (α-SMA) and phosphorylation protein kinase B (p-Akt) were measured.Results Compared with the control group,the apoptosis rate of 10 and 20 Gy IR group increased with irradiation dose (t =8.43,11.63,P ＜0.05) but they were reduced by the inhibitor of PI3K/Akt (t =8.09,4.88,P ＜0.05).The expressions of TGF-β1,α-SMA,and p-Akt also increased with irradiation dose (t =6.91,7.80,9.28,P＜0.05) but they were declined by this inhibitor for both 10 Gy IR (t =6.17,15.11,10.34,P＜0.05) and 20 Gy IR (t =10.04,6.85,23.84,P＜0.05).Conclusions X-ray irradiation could activate HSC through PI3K/Akt signaling pathway,which may further result in hepatic fibrosis.

Objective To investigate the clinical and electroencephalogram (EEG) characteristics of children with electrical status cpilepticus during sleep (ESES), and the response to medication therapy. Methods AEEG and VEEG including an entire sleeping c-ycle were performed on 26 patients with ESES. The clinical and EEG changes, neuropsychological impairment and the response to medication therapy were followed up. Results Twenty five patients had seizures,21 cases had normal psychomotor development before ESES. After the onset of the disease,Fifteen cases developed language disorder, 16 cases developed psychological and behavior abnormalities, 13 cases had both of the problems Seventeen patients belonged to epileptic syndrome. Patients in this cohort had good response to clonazepam and valproate treatment. Cortical steroid could dispel the electrical discharge. Eighteen patients had been followed up. Seizures stopped in 15 cases after treatment ESES disappeared in 16 cases, 4 of them still had neuropsychological impairment ESES sustained in 2 cases Conclusions ESES is a specific EEG phenomenon. Continue epileptic form discharge during non - rapid cye movement sleep is the major cause of neuropsychological impairment in patients with ESES. To control the seizures and electrical state are very important for the prevention and treatment of neuropsychological impairment.

Objective To investigate the genetic association between NF-E2-related factor 2(Nrf2)gene polymorphism and susceptibility to Parkinson's disease(PD)in the Han descent population of Shaanxi Province.Methods 553 PD patients from January 2015 to December 2016 were recruited to participate in the study as the PD group.According to the age of on-set,they were divided into early-onset Parkinson's disease(EOPD)group(186 cases),and late-onset Parkinson's disease (LOPD)group(367 cases).350 healthy volunteers without PD were randomly selected in their hospital in the same period of time as the control group.Genotype was determined by polymerase chain reaction combined with DNA direct sequencing technique for the polymorphism of the Nrf2 gene.Results The genotype and allele distribution of Nrf2-653G/A polymor-phism were significantly different between the EOPD group and control group(χ2=6.032,5.652,all P<0.05).There was no significant difference of genotype and allele distribution of three Nrf2 gene single nucleotide polymorphisms(SNPs)be-tween the PD group and control group,or LOPD group and control group,or EOPD group and LOPD group(all P>0.05). The frequency of haplotype A-A-C[(-653G/A)-(-651G/A)-(-617C/A)]were significantly different between the EOPD group and control group,and EOPD group and LOPD group(χ2=6.566,8.350,P=0.011,0.004).However,there was no significant difference of Nrf2 haplotype between the PD group and control group,or LOPD group and control group(all P>0.05).Conclusion Polymorphism of the Nrf2(-653G/A)gene maybe associated with the risk of PD.

Objective To investigate the effect of electro-acupuncture on cartilage renovation of knee osteoarthritis.Methods 40 female SD rats were randomly divided into the normal group,model group,electro-acupuncture treatment group and control group.The left knees of the treatment group and right ones of the control group were treated by electro-acupuncture for two weeks from the fifth week since operation.Collected left knees' cartilage of all rats at the seventh week since the beginning of experiment.HE and immunohistochemical staining were used to observe the expression characteristic of transforming growth factor-β1(TGF-β1)in cartilage.Results The expression of TGF-β1 in the treatment group was very significantly stronger than all other groups(P<0.01).Conclusion Electro-acupuncture can obviously up-regulate the level of TGF-β1 in cartilage of experimental rats with knee osteoarthritis,and promote the repair of cartilage.

Epithelial-to-mesenchymal transition (EMT) plays a critical role in cancer metastasis,and is relevant to the inflammatory microenvironment.Lipopolysaccharide (LPS),a cell wall constituent of gram-negative bacteria,has been reported to induce EMT of cancer cells through TLR4 signal.We previously reported that LPS promoted metastasis of mesenchymallike breast cancer cells with high expression of cyclin D 1 b.However,the role of cyclin D1b in LPS-induced EMT has not been fully elucidated.In the present study,we described that cyclin D1b augmented EMT induced by LPS in MCF-7 breast cancer cells.Cyclin D1b markedly amplified integrin αvβ3 expression,which was further up-regulated under LPS stimulation.Our results showed ectopic expression of cyclin D1b promoted invasiveness of epithelial-like MCF-7 cells under LPS stimulation.Additionally,LPS-induced metastasis and EMT in MCF-7-D1b cells might depend on αvβ3 expression.Further exploration indicated that cyclin D1b cooperated with HoxD3,a transcription factor promoting αvβ3 expression,to promote LPS-induced EMT.Knockout of HoxD3 repressed LPS-induced EMT and αvβ3 over-expression in MCF-7 cells with high expression of cyclin D1b.Specifically,all these effects were in a cyclin D1a independent manner.Taken all together,LPS up-regulated integrin αvβ3 expression in MCF-7 cells with high expression of cyclin D 1b and induced EMT in breast cancer cells,which highlights that cyclin D1b may act as an endogenous pathway participating in exogenous signal inducing EMT in breast cancer cells.