Brain ; pathology ; Humans ; Infant, Newborn ; Lung ; pathology ; Male ; Seizures ; etiology ; pathology ; Tomography, X-Ray Computed ; Tuberous Sclerosis ; complications ; pathology

The Sonic hedgehog (SHH) signaling pathway plays a pivotal role in neurogenesis and brain damage repair. Our previous work demonstrated that the SHH signaling pathway was involved in the neuroprotection of cortical neurons against oxidative stress. The present study was aimed to further examine the underlying mechanism. The cortical neurons were obtained from one-day old Sprague-Dawley neonate rats. Hydrogen peroxide (H(2)O(2), 100 μmol/L) was used to treat neurons for 24 h to induce oxidative stress. Exogenous SHH (3 μg/mL) was employed to activate the SHH pathway, and cyclopamine (20 μmol/L), a specific SHH signal inhibitor, to block SHH pathway. LY294002 (20 μmol/L) were used to pre-treat the neurons 30 min before H(2)O(2) treatment and selectively inhibit the phosphatidylinositol 3-kinase (PI3K)/Akt pathway. The cell viability was measured by MTT and apoptosis rate by flow cytometry analysis. The expression of p38, p-p38, ERK, p-ERK, Akt, p-Akt, Bcl-2, and Bax in neurons was detected by immunoblotting. The results showed that as compared with H(2)O(2) treatment, exogenous SHH could increase the expression of p-Akt by 20% and decrease the expression of p-ERK by 33%. SHH exerted no significant effect on p38 mitogen-activated protein kinase (p38 MAPK) pathway. Blockade of PI3K/Akt pathway by LY294002 decreased the cell viability by 17% and increased the cell apoptosis rate by 2-fold. LY294002 treatment could up-regulate the expression of the pro-apoptotic gene Bax by 12% and down-regulate the expression of the anti-apoptotic gene Bcl-2 by 54%. In conclusion, SHH pathway may activate PI3K/Akt pathway and inhibit the activation of the ERK pathway in neurons under oxidative stress. The PI3K/Akt pathway plays a key role in the neuroprotection of SHH. SHH/PI3K/Bcl-2 pathway may be implicated in the protection of neurons against H(2)O(2)-induced apoptosis.

Objective To summarize the experience of adjuvant therapy for primary hepatocellular carcinoma. Methods 316 cases of operable hepatocellular carcinoma were divided into three groups. Only hepatectomy were performed in group one (21 8cases).Preopemtive adjuvant TACE were done in group two (52 cases). Preoperative adjuvant TACE and postoperative trans-portal vein chemotherapy were done in group three (46 cases), which was named hepatectomy sequencing two vessel therapy. Results 1, 3 and 5 year survival rote were 51.2 %, 30.0 % and 20.5 % respectively in group one, 57.2 %, 43.0 % and 31.5 % in group two, 84.0 %, 62.5 % and 51.0 % in group three. The postoperative disease-free survival rate in group three was significantly higher than that in group one and group two (P ＜0.05). Conclusion Hepatectomy sequencing two vessels therapy in perioperative period might improve the survival rate, which can prevent and delay the incidence of recurrence and may improve the effect of liver resection.

Aim To explore the effects of anti-HER-2 chimeric antibody chA 21 on proliferation and apoptosis of SKBR3 cells.Methods MTT colorometric assay,HE staining,transmission electron microscopy,flow cytometry,and TUNEL were used to study the proliferation inhibition and apoptosis induction of SKBR3 cells by chA 21 in vitro.Results Proliferative inhibition rates and apoptotic index of SKBR3 cells were increased in a dose and time dependent manner after exposure to chA21(0.2～5.4 mg?L~(-1)).Conclusion chA 21 could remarkably inhibit proliferation of SKBR3 cells in vitro and apoptosis induction may be one of its main mechanisms.

The effects of Sonic hedgehog (Shh) signaling pathway activation on S-type neuroblastoma (NB) cell lines and its role in NB tumorigenesis were investigated. Immunohistochemistry was used to detect the expression of Shh pathway components-Patched1 (PTCH1) and Gli1 in 40 human primary NB samples. Western blotting and RT-PCR were used to examine the protein expression and mRNA levels of PTCH1 and Gli1 in three kinds of S-type NB cell lines (SK-N-AS, SK-N-SH and SHEP1), respectively. Exogenous Shh was administrated to activate Shh signaling pathway while cyclopamine was used as a selective antagonist of Shh pathway. S-type NB cell lines were treated with different concentrations of Shh or/and cyclopamine for different durations. Cell viability was measured by using MTT method. Apoptosis rate and cell cycle were assayed by flow cytometry. The xenograft experiments were used to evaluate the role of Shh pathway in tumor growth in immunodeficient mice. High-level expression of PTCH1 and Gli1 was detected in both NB samples and S-type NB cell lines. Cyclopamine decreased the survival rate of the three cell lines while Shh increased it, and the inhibition effects of cyclopamine could be partially reversed by shh pre-treatment. Cyclopamine induced the cell apoptosis and the cell cycle arrest in G(0)/G(1) phase, while Shh induced the reverse effects and could partially prevent effects of cyclopamine. Cyclopamine could also inhibit the growth of NB in vivo. Our studies revealed that activation of the Shh pathway is important for survival and proliferation of S-type NB cells in vivo and in vitro through affecting cell apoptosis and cell cycle, suggesting a new therapeutic approach to NB.

Objective: To observe the effect of electroacupuncture (EA) pretreatment on the protein expression of c-fos in fastigial nucleus (FN) and lateral hypothalamus area (LHA) in rats with acute myocardial ischemia-reperfusion injury (MIRI), and to explore the role and mechanism of FN and LHA in EA at the Heart Meridian fighting against acute MIRI reaction. Methods: Seventy Sprague-Dawley rats were randomly divided into a sham operation group, a model group, an EA-Heart Meridian group and an EA-Lung Meridian group, with 14 rats in each group; an LHA lesion plus EA-Heart Meridian group (LHA+EA-Heart Meridian group) and a FN lesion plus EA-Heart Meridian group (FN+EA-Heart Meridian group), with 7 rats in each group. Except the sham operation group, the left anterior descending branch of coronary artery was ligated to establish acute MIRI rat models in the other 5 groups. In the three groups with EA-Heart Meridian treatment, Shenmen (HT 7) and Tongli (HT 5) were selected; Taiyuan (LU 9) and Lieque (LU 7) were selected in the EA-Lung Meridian group. All the EA groups received EA stimulation prior to modeling, with 1 mA in current intensity and 2 Hz in frequency, 20 min each time, once a day for a total of 7 d. The sham operation group and the model group did not receive EA stimulation. The electrocardiogram was observed in the rats to analyze the ST-segment deviation and cardiac arrhythmia score. The expression of c-fos protein in FN and LHA was detected by immunohistochemistry method. Results: Compared with the sham operation group, the ST-segment deviation, cardiac arrhythmia score and the expression of c-fos protein in the FN and LHA increased significantly in the model group (all P<0.05). Compared with the model group, the ST-segment deviation, cardiac arrhythmia score and the expression of c-fos protein in FN and LHA decreased significantly in the EA-Heart Meridian group (all P<0.05). Compared with the EA-Heart Meridian group, the ST-segment deviation and cardiac arrhythmia score increased significantly in the EA-Lung Meridian group, LHA+EA-Heart Meridian group and FN+EA-Heart Meridian group (all P<0.05); the expression of c-fos in FN increased significantly in the EA-Lung Meridian group and LHA+EA-Heart Meridian group (both P<0.05); the expression of c-fos in LHA increased significantly in the EA-Lung Meridian group and FN+EA-Heart Meridian group (both P<0.05). Conclusion: FN and LHA are involved in the mechanism of EA at Heart Meridian to improve the acute MIRI reactions, and the cerebellum may participate in the improvement of cardiac function by EA through the cerebellum-hypothalamus projection.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Fracture Healing ; drug effects ; Humans ; Male ; Middle Aged ; Phytotherapy ; Tibial Fractures ; drug therapy

Objective To elucidate the association of interleukin (IL)-17F A7488G (p.His161Arg) polymorphism with gastric cancer susceptibility,clinicopathological features and survival.Methods DNA from 927 unrelated patients with gastric cancer and 777 age and gendermatched healthy controls was typed for IL-17F A7488G polymorphism by polymerase chain reactionrestriction fragment length polymorphism.Logistic regression analyses and Cox proportional hazards analyses were used to evaluate the associations between polymorphisms and gastric cancer susceptibility,clinicopathological features and survival.Results There was significant difference between healthy controls and patients with gastric cancer with respect to frequencies of IL-17FA7488G genotypes (X2= 16.55,P<0.01).After adjusted for age and gender,IL-17F A7488G GA and GG genotypes were associated with an increased risk of gastric cancer compared with the AA genotype (OR=1.51;95% CI:1.22-1.87 for GA;OR=1.61,95% CI:1.03-2.51 for GG).In comparison with AA genotype carriers,the risk of gastric cancer increased in those with GA or GG genotypes (OR= 1.53,95 % CI:1.25- 1.87,P<0.01 ).Further stratification analyses indicated that the effect of IL-17F A7488G GA genotype was especially noteworthy in gastric cancer patients of noncardia,intestinal type,poorly and moderately differentiated,and lymph node metastasis.Whereas there was no significant difference in survival among subjects with different polymorphisms of IL-17F A7488G gene (P= 0.534).Conclusions Genetic polymorphism of IL-17F A7488G involves in susceptibility to gastric cancer,which also influences certain subtypes of gastric cancer according to clinicopathological features,however,it is not the independent risk factor for prognosis of gastric cancer patients.

OBJECTIVEIt has been demonstrated that when a high-speed handpiece stops rotating, negative pressure will form. Thus, contaminating fluid in which there are many kinds of bacteria and viruses from the external environment will retract into various compartments of the handpiece and the dental unit. The purpose of the study is to compare the preventing effect of antisuction designed handpiece and conventional handpiece on viral contamination at different rotating times.

METHODSTwenty handpieces with or without antisuction device (10 of each) were used in the study. Each handpiece was submerged into 10(-6) microg/microl HBV particle solution rotating 5 and 10 times respectively (every time rotating for 10 seconds). Samples were obtained from the water line and chip air line of the handpieces and examined by RT-PCR.

RESULTSAt the same rotating times, there was statistical significance of the viral concentration between the two kinds of handpieces (P < 0.05) . However, there was no statistical significance of the viral concentration between different rotating times in each group (P > 0.05).

CONCLUSIONContamination taking place in both water and air lines of dental handpiece was not enhanced by increasing the number of rotating times of the handpiece. The antisuction devices installed into the water line and chip air line were demonstrated to prevent viral contamination effectively.

Objective To quantitatively analyze the epidemic situation of tuberculosis(TB)by modeling the data of tuberculosis in prefectures of Xinjiang,and predict the new cases of tuberculosis in prefectures of Xinjiang.Methods A dynamic model was used to fit the data of TB in 14 prefectures in Xinjiang from 2005 to 2014,the results of the fitting were verified by tuberculosis data in 2015－2017,verified results were evaluated,estimated values and basic reproductive numbers (R0)of parameters in each region were obtained,data of new TB in 2018－2022 were predic-ted.Results The verification of TB data in 2015－2017 showed that the actual values fell within the 95% confidence interval of the predictive value curve,model was fit well.R0in Southern Kashgar was 1 1.38 (95%CI:1 1.33－11.50),R0in Urumqi City in Eastern Xinjiang and Ili Kazak Autonomous Prefecture in Northern Xinjiang were 5.46 (95% CI :5.28－5.50)and 2.22 (95% CI :2.18－2.28)respectively.The epidemic situation of TB in Southern Xinjiang was more serious than that in Northern and Eastern Xinjiang,epidemic situation of TB in Kash- gar Prefecture was most serious.The predicted results showed that the number of new TB from 2018 to 2022 will slowly grow in most prefectures.Conclusion The dynamical model of TB fits well and is feasible in this study,it can be used for prediction of new TB cases,intervention and management in Southern Xinjiang should be strength-ened to control the prevalence of TB.