Research and application of model fruit fly in prevention and treatment of neuropsychiatric disorders by traditional Chinese medicine and natural compounds: a review / 中国中药杂志

As an important model animal, fruit fly is characterized by outstanding genetic characteristics, relatively perfect nervous system, rapid reproduction, and low cost. Thus, it has been applied in the research on neuropsychiatric disorders in recent years, showing great potential in life science. The incidence of neuropsychiatric disorders has been on the rise, and the disorders have high disability rate and low case fatality rate. The global drug demand for such diseases is second only to cardiovascular and cerebrovascular diseases. At the moment, the demand of the drugs for the diseases have been rising, and it is an urgent task to develop related drugs. However, the research and development of the drugs are time-intensive and have a high failure rate. A suitable animal model can help shorten the time for drug screening and development, thereby reducing the cost and failure rate. This study reviews the application of fruit flies in several common neuropsychiatric disorders, which is expected to provide new ideas for the research and application of the model animals in traditional Chinese medicine.

Resveratrol promotes autophagy through zinc ion and induces cardiomyocyte protection / 中国药理学通报

Aim To investigate whether resveratrol (Resveratrol, Res) induces cardiomyocyte protection by increasing intracellular zinc ion and its possible signal mechanism. Methods H9c2 cells were routinely cultured and 2-deoxyglucose (2-DG) was used to establish an endoplasmic reticulum stress (ERS) model. The experiment was randomly divided into control group, 2-DG group, Res +2-DG group, TPEN + Res + 2-DG group and 3-MA + Res +2-DG group. Cell viability was detected by MTT and CCK-8; the expression levels of ERS molecular chaperone proteins glucose-regulated protein 78 (GRP78), glucose-regulated protein 94 (GRP94) and autophagy proteins LC3 II / I, p62 and p-AMPK were detected by Western blot; the expression of LC3 protein was measured by cellular immunofluorescence; the mitochondrial membrane potential (Aijjm) and the intracellular zinc ion level were measured by laser scanning confocal microscope. Results Compared with the control group, 2-DG reduced cell activity and resveratrol inhibited the changes caused by 2-DG, which was reversed by zinc chelator TPEN. 2-DG increased GRP78 and GRP94 expression and resveratrol inhibited the protein changes caused by 2-DG, which was reversed by TPEN. 2-DG increased the expression of LC3 II / I, p-AMPK and decreased the expression of p62, and resveratrol promoted the effect of 2-DG. 2-DG increased the fluorescence intensity of LC3, and resveratrol enhanced the effect of 2-DG, which was reversed by TPEN and 3-MA. 2-DG reduced the red fluorescence intensity of mitochondrial TMRE and green fluorescence intensity of intracellular zinc ions, and resveratrol inhibited these changes caused by 2-DG, which was also reversed by TPEN and 3-MA. The above differences were all statistically significant (P < 0. 05). Conclusion Resveratrol increases intracellular zinc to promote ERS-induced autophagy and prevent the mPTP opening in H9c2 cardiac cells.

Phenylpropanoid Metabolism Pathway in Plants / 中国生物化学与分子生物学报

It is well established that plants as sessile organisms, are constantly threatened by various biotic and abiotic stresses in the living environment. So, during the long evolutionary process, sessile plants have to integrate a wide variety of environmental cues into their developmental programme to prioritize adaptive morphogenesis and metabolic pathways precise control. Previous studies have shown that the phenylpropane metabolic pathway is one of the important secondary metabolic pathways in plants, and the metabolites via phenylpropane metabolism, such as lignin, sporopollen, anthocyanin and organic acids, play an important role in the regulation of plant adaptive growth. In medicinal plants, the phenylpropane metabolic pathway is closely related to the synthesis of many medicinal active ingredients. Almost all natural medicinal molecules containing phenylpropane skeleton are synthesized directly or indirectly through this metabolic pathway, for example flavonoids, terpenoids, phenols, etc. In addition, some secondary metabolites biosynthesized through phenylpropane metabolic pathway can be secreted from the plant root system into the peripheral soil to affect plant growth and ability of abiotic and biotic stress resist, by changing the microbial ecology of plant root system. Meanwhile, this phenylpropane-mediated plant-microbe interaction can also affect the genuine characters of the medicinal plants. In this paper, we summarize the latest research progress of plant phenylpropane metabolic pathway, especially the physiological functions and expression regulation mechanism of the products of phenylpropane metabolic pathway are introduced. We aim to provide guidance for further understanding of the potential relationship between the quality of medicinal plants and plant phenylpropane metabolic pathway, in the end to direct excellent Chinese herbal medicine breeding, then to further promote the vigorous development of Chinese medicine in China.

Effect of Licochalcone A on Apoptosis in Human Breast Cancer MDA-MB-231 Cells / 中国实验方剂学杂志

Objective:To investigate the effect of licochalcone A （LCA） on apoptosis in human breast cancer MDA-MB-231 cells， and to explore its possible mechanism. Method:MDA-MB-231 cells were treated with LCA of different concentrations， and<italic> </italic>cell counting kit-8 （CCK-8） assay was used to detect the cell viability. The cells were treated with LCA （10， 20， and 40 μmol·L^-1） for 24 h， and apoptosis was detected by Annexin V staining with fluorescein isothiocyanate （FITC） and propidium iodide （PI） （Annexin V-FITC/PI）. The level of intracellular reactive oxygen species （ROS） was detected by 2′，7′-dichlorodihydrofluorescein diacetate （DCFA-DA） fluorescent probe. Mitochondrial membrane potential （MMP） was detected by 5， 5′， 6， 6′-tetrachloro-1， 1′， 3， 3′-tetraethyl-imidacarbocyanine （JC-1） fluorescence probe. Western blot was used to detect the expression of cell apoptosis-related proteins， such as B-cell lymphoma-2 （Bcl-2） and Bcl-2-associated X protein （Bax）， and endoplasmic reticulum （ER） stress-related proteins， such as C/EBP homologous protein （CHOP）， activating transcription factor 4 （ATF4）， protein kinase R-like ER kinase （PERK）， p-PERK， eukaryotic translation initiation factor 2 alpha （eIF2<italic>α</italic>）， and p-eIF2<italic>α</italic>. Result:With the increase in the drug concentration （starting from 5 μmol·L^-1）， the cell viability decreased （<italic>P<</italic>0.05） with IC₅₀of 19.05 μmol·L^-1 as compared with the normal group. Additionally， the apoptosis rates of the LCA groups （10， 20， 40 μmol·L^-1） significantly increased （<italic>P</italic><0.05）， which reached 30.2% （<italic>P</italic><0.05） at LCA concentration of 40 μmol·L^-1. LCA （10， 20， and 40 μmol·L^-1） decreased the expression of Bcl-2 （<italic>P<</italic>0.05） and increased Bax expression （<italic>P<</italic>0.05） in a dose-dependent manner. Besides， the intracellular ROS level was elevated （<italic>P<</italic>0.05） and mitochondrial MMP was reduced （<italic>P<</italic>0.05） after LCA （10， 20， and 40 μmol·L^-1） treatment in a dose-dependent manner， leading to mitochondrial dysfunction. LCA （10， 20， and 40 μmol·L^-1） induced ER stress to up-regulate the expression of CHOP， ATF4， p-PERK， and p-eIF2<italic>α</italic> （<italic>P<</italic>0.05） in a dose-dependent manner. Conclusion:LCA can induce MDA-MB-231 cell apoptosis by increasing intracellular ROS level and reducing MMP to trigger mitochondrial dysfunction and ER stress.

Similarities and differences in clinical and pathologic features of inflammatory bowel disease-associated colorectal cancer in China and Canada / 中华医学杂志(英文版)

Background@#Colorectal cancer (CRC) has become one of the major life-threatening complications in patients with inflammatory bowel disease (IBD), which includes ulcerative colitis (UC) and Crohn’s disease (CD). This study aimed to explore the clinicalpathologic similarities and differences in the IBD-associated CRC (IBD-CRC) between patients in China and Canada.@*Methods@#Data of 78 patients with IBD-CRC retrospectively retrieved from two representative medical institutions in Beijing (China) and Calgary (Canada) over the same past 13 years, including 25 (22 UC-associated and three CD-associated) from Beijing group and 53 (32 UC-associated and 21 CD-associated) from Calgary group, were compared with regards to their clinical and pathologic characteristics.@*Results@#Several known features of IBD-CRC were seen in both groups, including long duration and large extent of colitis, active inflammation background, multifocal lesions, and advanced tumor-node-metastasis stage. Beijing group showed a significantly higher percentage of UC (88.0% vs. 60.4%, P = 0.018), younger age at diagnosis of CRC (48.6 ± 12.8 years vs. 61.6 ± 14.7 years, P < 0.001), lower ratio of mucinous adenocarcinoma (7.1% vs. 42.4%, P = 0.001) compared with Calgary group. None of the Beijing group had concurrent primary sclerosing cholangitis, while 5.7% of Calgary group did. Surveillance colonoscopy favored the detection rate of precancerous lesions (41.4% vs.17.0%, P = 0.002).@*Conclusions@#As compared with patients from the Calgary group, the IBD-CRC patients in Beijing group were younger, less CD-associated and had less mucinous features, otherwise they were similar in many common features.

Similarities and differences in clinical and pathologic features of inflammatory bowel disease-associated colorectal cancer in China and Canada / 中华医学杂志(英文版)

BACKGROUND@#Colorectal cancer (CRC) has become one of the major life-threatening complications in patients with inflammatory bowel disease (IBD), which includes ulcerative colitis (UC) and Crohn's disease (CD). This study aimed to explore the clinical-pathologic similarities and differences in the IBD-associated CRC (IBD-CRC) between patients in China and Canada.@*METHODS@#Data of 78 patients with IBD-CRC retrospectively retrieved from two representative medical institutions in Beijing (China) and Calgary (Canada) over the same past 13 years, including 25 (22 UC-associated and three CD-associated) from Beijing group and 53 (32 UC-associated and 21 CD-associated) from Calgary group, were compared with regards to their clinical and pathologic characteristics.@*RESULTS@#Several known features of IBD-CRC were seen in both groups, including long duration and large extent of colitis, active inflammation background, multifocal lesions, and advanced tumor-node-metastasis stage. Beijing group showed a significantly higher percentage of UC (88.0% vs. 60.4%, P = 0.018), younger age at diagnosis of CRC (48.6 ± 12.8 years vs. 61.6 ± 14.7 years, P < 0.001), lower ratio of mucinous adenocarcinoma (7.1% vs. 42.4%, P = 0.001) compared with Calgary group. None of the Beijing group had concurrent primary sclerosing cholangitis, while 5.7% of Calgary group did. Surveillance colonoscopy favored the detection rate of precancerous lesions (41.4% vs.17.0%, P = 0.002).@*CONCLUSIONS@#As compared with patients from the Calgary group, the IBD-CRC patients in Beijing group were younger, less CD-associated and had less mucinous features, otherwise they were similar in many common features.

Clinical practice guidelines for post-stroke depression in China

Post-stroke depression (PSD) is a very common complication that leads to increased physical disability, poor functional outcome, and higher mortality. Therefore, early detection and treatment are very important. Since there are currently no specific guidelines for this disorder in China, the purpose of this study was to develop PSD guidelines and provide suggestions for clinicians and related workers.

China Medical Team: Medical rescue for "4.25" Nepal earthquake / 中华创伤杂志(英文版)

In recent years, global natural disasters have been frequent and resulted in great casualties and property loss. Since Wenchuan earthquake, the disaster emergency rescue system of China has obtained considerable development in various aspects including team construction, task scheduling, personnel training, facilities and equipments, logistics, etc. On April 25, 2015, an earthquake that measured 8.1 on the Richter scale attacked Nepal. Chinese government firstly organized a medical team, named China Medical Team, and sent it to the attacked region in Nepal to implement medical rescue. The medical team completed the rescue mission successfully and creatively based on their experiences.

Study on intestinal absorption features of berberine hydrochloride phospholipid solid dispersions by rat single-pass perfusion model / 中草药

Objective: To compare intestinal absorption features of berberine hydrochloride phospholipid solid dispersions (BBH-PSD) by rat single-pass perfusion model, and to explore the mechanism of berberine bioavailability increasing mechanism by phospholipid solid dispersion technology. Methods: The single-pass perfusion model was established in rats, the concentration of berberine in intestinal perfusion was determined by HPLC, and phospholipid solid dispersion technology promoting intestinal absorption of berberine was investigated. Results: Compared with berberine, BBH-PSD could promote much more absorption of berberine in various intestinal segments, especially in jejunum, and the mechanism was related to improving permeability and strengthen simple diffusion of berberine. The Ka and Papp values of BBH and BBH-PSD in jejunum were obviously higher than BBH (P < 0.05); When the volumetic flow rate of BBH-PSD was 0.2, 0.4, and 0.8 mL/min, Ka and Papp were both higher than BBH (P < 0.05); The increasing mass concentration was not obvious to intestinal absorption of BBH, while the increasing mass concentration of BBH-PSD obviously increased the intestinal absorption of BBH (P < 0.05). Conclusion: Intestinal absorption characteristics of berberine phospholipid solid dispersion is beneficial to improve berberine oral bioavailability, and it can provide a scientific basis for the development of new dosage forms of berberine hydrochloride.

Study of brain distribution of Ephedra alkaloids based on UHPLC-QTOF-MSE and UHPLC-MS/MS method / 药学学报

Using ultra high performance liquid chromatography (UHPLC) coupled with mass spectrum (MS) technology, a method has been established for separation and analysis of alkaloid isomers. Alkaloids in Ephedra sinica transitionally crossed blood brain barrier (BBB) and the distribution were investigated. The concentrations of Ephedra alkaloids in rat central nervous system (CNS) were determined to acquire the distribution characteristics and differences in cerebral cortex, cerebellum, hippocampus, striatum, medulla oblongata and hypothalamus. It was founded that pseudoephedrine, norephedrine, norpseudoephedrine, methylephedrine (methylpseudoephedrine) were able to cross BBB fast via gastro-intestinal tract after administrated with Ephedra sinica. Cortex and hippocampus was the main distribution region, followed by hypothalamus, striatum and cerebellum, in which medulla oblongata had the least. The distribution of various alkaloids, as AUC0-t, brain/AUC0-t, blood was ephedrine > methylephedrine > demethyl ephedrine. Alkaloids in Ephedra sinica crossed BBB rapidly, showing the regional distribution tendency in central nervous system, and the distribution was diversity. This group of data provides distribution of bioactive constituents of Ephedra in CNS.

Progress on the minimally invasive surgical treatment for the acute Achilles tendon rupture / 中国骨伤

Acute Achilles tendon rupture is a common sports injury, is currently the best treatment for acute Achilles tendon rupture there are more controversial programs in the clinical, their treatment is divided into conservative treatment and surgical treatment. Conservative treatment for a long time, and then the higher Achilles tendon rupture rate, postoperative recovery slow. There are a number of complications traditional open surgery, and minimally invasive surgery in recent years developed a new technology that minimizes the exposure of the wound, reduce surgical trauma scope, shorten the operation time and reduce wound infection rate increasing importance in clinical practice, worthy of recommendation.

Effect of zinc ion on myocardial mitochondrial protection / 中国药学杂志

OBJECTIVE: To investigate the cardioprotective effect of exogenous zinc (Zn2+) on the mitochondrial pathway, and to explore its possible mechanism. METHODS: Rat heart tissue-derived H9c2 cardiac cells were cultured, and then randomly divided into control group, ZnCl2 group (1-20 μmol·L-1, 20 min), ZnCl2 plus inhibitor group [PI3K inhibitor LY294002, 10 μmol·L-1and mitochondrial ATP sensitive potassium channel (mKATP) inhibitor 5-HD, 0.5 mmol·L-1, inhibitors treated cells for 10 min and then ZnCl2 20 min] and inhibitor group (10 min). The mitochondrial permeability transition pore (mPTP) opening was evaluated by measuring mitochondrial membrane potential (ΔΨm). Tetramethylrhodamine ethyl ester (TMRE) diacetate fluorescence images were obtained with laser scanning confocal microscopy. GSK-3β and AKT phosphorylation were determined with Western blot. The cells were subjected to simulated ischemia/reperfusion injury, cell viability were determined with flow cytometry. Cells were transfected with constitutively active GSK-3β-S9A (GSK-3β-S9A) plasmid by Fugene 6 transfection kit, mPTP opening was evaluated by confocal microscopy. RESULTS: Compared with the normal, exposure of cells to H2O2 for 20 min caused a marked decrease in TMRE fluorescence, treatment of cells with different dose of Zn2+ prevented the loss of TMRE fluorescence caused by H2O2 with the peak at 10 μmol·L-1. Western blot showed that Zn2+ significantly enhanced the GSK-3β and AKT phosphorylation, the effect that was significantly reversed by LY294002, but not 5-HD. Compared with the normal, ischemia/reperfusion markedly reduced cell viability. Zn2+ applied at ischemia did not increase the cell viability, but significantly increased the cell viability when given at reperfusion. Zn2+ could mimic the specific mPTP inhibitor cyclosporin A (1 μmol·L-1) and prevent the mPTP opening, which was again reversed by LY294002 but not 5-HD. Zn2+ was not able to exert protection in cells transfected with the GSK-30-S9A. CONCLUSION: Zn2+ can induce myocardial mitochondrial protective effect by modulating the mPTP opening through the inactivation of GSK-3β via PI3K/AKT pathway. mKATP may not be involved in the action of Zn2+.

Rapid identification of the different constituents in Fructus Schisandrae Chinensis before and after processing by UHPLC-QTOF/MSE combining with metabonomics / 药学学报

This study was performed to use UHPLC-QTOF/MSE technology to rapidly search and identify variations of chemical ingredients between Fructus Schisandrae Chinensis and its processed products. The present study provides a basis for the study of Chinese herbal medicine processing with a focus on the impact of processing on chemical components. Using a time-dependent data scan mode (MSE) couple with metabolomics technology, we acquired accurate data and identified the potential chemical markers. A total of 12 chemical markers were identified in the crude, vinegar-processed and wine-processed Schisandra chinensis fruit; The results showed that the levels of 6-O-benzoylgomisin O, schisantherin B, schisantherin C, schisantherin D and neokadsuranic acid are the highest in crude Schisandra chinensis fruit; thelevels of schizandrin A, schizandrin B, schizandrin C, gomisin D and gomisin T are the highest in wine-processed Schisandra chinensis fruit; the levels ofschisantherin A and schisandrin are the highest in vinegar-processed Schisandra chinensis fruit. There were significant changes of chemical components between Fructus Schisandrae Chinensis and their processed products, and these findings may offer a reasonable explanation for variation of efficacy and clinical applications in the processed products of Fructus Schisandrae Chinensis.

Intestinal absorption of pulchinenosides from Pulsatilla chinensis in rats / 中国中药杂志

HPLC-ELSD was applied to explore the absorption mechanism of pulchinenosides (B3, BD, B7, B10, B11) in rats. The experimental results showed that the absorption rate constant, Ka value (B3, BD) and Permeability coefficient, Peff value (B3, B7) displayed significant difference (P <0.05) in various intestinal segments, The Ka value and Peff value of PRS was different from each other with the highest absorption in duodenum (duodenum > jejunum > colon > ileum); The PRS displayed excessive satuation as the concentration increased over 0.05-2.5 g · L(-1). There were no obvious linear correlations between Peff values and concentrations in duodenum (0.6007 ≤ R2 ≤ 0.7727); Ka and Peff value declined when the PRS was perfused with P-glycoprotein promoter digoxin, on the other hand, inclined when perfused with P-glycoprotein inhibitor verapamil with significant difference among PRS B3, BD, B7, B11 (P <0.05). All the above results demonstrated that B3, BD, B7 were greatly influenced by absorption sites, duodenum was the main absorption site; PRS didn't entirely transported in a concentration dependent manner, and the transporter-protein involved the transportation, so the intestinal absorption of the five pulchinenosides was not entirely passive diffusion; and PRS might be the substrates of P-glycoprotein.

Application of Finite Element Method in Thoracolumbar Spine Traumatology / 法医学杂志

The finite element method (FEM) is a mathematical technique using modern computer technology for stress analysis, and has been gradually used in simulating human body structures in the biomechanical field, especially more widely used in the research of thoracolumbar spine traumatology. This paper reviews the establishment of the thoracolumbar spine FEM, the verification of the FEM, and the thoracolumbar spine FEM research status in different fields, and discusses its prospects and values in forensic thoracolumbar traumatology.

Controlled observation of clinical efficacy on knee osteoarthritis treated with auricular electroacupuncture and the isolated moxibustion with Lingxian herbal paste / 中国针灸

<p><b>OBJECTIVE</b>To observe the difference in the therapeutic effects on knee osteoarthritis (KOA) among auricular electroacupuncture therapy plus isolated moxibustion with Lingxian herbal paste (combined therapy), electroacupuncture (EA) and TDP irradiation.</p><p><b>METHODS</b>Eighty-nine cases were randomized into three groups. In the combined therapy group (30 cases), the auricular electroacupuncture therapy was adopted together with the isolated moxibustion with Lingxian herbal paste. The auricular points were xi (AH4), pizhixia (AT4), shenmen (TF4), etc. The Lingxian herbal paste was applied at Yanglingquan (GB 34), Dubi (ST 35), Zusanli (ST 36), Neixiyan (EX-LE 4), Heding (EX-LE 2) and Ashi points. In EA group (29 cases), EA was applied at the acupoints that were same as those in the isolated moxibustion with Lingxian herbal paste. In TDP group (30 cases), TDP irradiation was given at the affected knee. The treatment was given once every day, 10 treatments made one session and there was 1 week at the interval among sessions. Totally, 3 sessions of treatment were required. KOA clinical symptom and physical sign score and the single item pain symptom score of Lequesne index were observed before treatment and 1 week after treatment in the patients of each group separately. The efficacies were compared among the three groups.</p><p><b>RESULTS</b>One week after treatment, the total score of symptoms and physical signs of the patients in each group was reduced significantly as compared with that before treatment (all P < 0.05). The improvements in the symptoms and physical signs in the combined therapy group were better than those in the other two groups (1.50 +/- 1.57 vs 2.52 +/- 1.82, 2.63 +/- 1.97, both P < 0.05). The improvement in pain in the combined therapy group was also better than that in the other two groups (2.37 +/- 0.81 vs 2.83 +/- 0.92, P < 0.05; 2.37 +/- 0.81 vs 3.03 +/- 0.77, P < 0.01). The curative rate in the combined therapy group was 40.0% (12/30), which was higher than 17.2% (5/29) in EA group and 20.0% (6/30) in TDP group separately (both P < 0.01). The overall efficacy in the combined therapy group was superior to the other two groups (P < 0.05).</p><p><b>CONCLUSION</b>The auricular electroacupuncture therapy plus isolated moxibustion with Lingxian herbal paste is advantageous at the total score of the symptoms and physical signs and the overall efficacy in the patients of KOA as compared with EA at the local acupoints and local TDP irradiation.</p>

Effect of astragaloside IV on H2O2-induced mitochondrial damage in rat myocardium and its molecular mechanism / 中国药学杂志

OBJECTIVE: To investigate the cardioprotective effect of astragaloside IV on the mitochondrial pathway, and to explore its possible mechanism.

Study on intestinal absorption of formononetin in Millettia nitita var. hirsutissima in rats / 中国中药杂志

To use the single-pass intestine perfusion (SPIP) model and HPLC to determine the concentration of formononetin, the effect of quality concentrations of formononetin, different intestinal segments and P-glycoprotein inhibitor on intestinal absorption of formononetin, in order to observe the intestinal absorption mechanism of formononetin from Millettia nitita var. hirsutissima in rats. The experimental results showed that the qulaity concentration of formononetin in the perfusate had no significant effect on the absorption rate constant (K(a)) and the apparent absorption coefficient (P(app)); K(a) and P(app) of formononetin in duodenum, jejunum and ileum showed no significant difference. However, K(a) was significantly higher than that in colon (P < 0.05), with significant difference between that in intestinum tenue and colon. P-glycoprotein inhibitor verapamil showed significant difference in K(a) and P(app) in intestinal segments (P < 0.05). This indicated that the absorption mechanism of formononein in rat intestinal tracts passive diffusion, without any saturated absorption. Formononein is absorbed well in all intestines. Their absorption windows were mainly concentrated in the intestinum tenue, without specific absorption sites. Formononein may be the substrate of P-glycoprotein.

Effect of HeLa cells infected with Coxsackie virus B3 on mTOR and p70S6K mRNA expression under different nutritional conditions / 中华实用儿科临床杂志

Objective To explore the effect of HeLa cells infected with Coxsackie virus B3 (CVB3) on the changes of mTOR signal pathway under different nutritional conditions.Methods The HeLa cells were cultured under conventional culture and serum starvation culture.(1) For the conventional method,the medium with 10 g/L fetal bovine serum was added for 24 h after the Hela cells were fused into 40％ to 50％,and the medium was changed on the next day,then the virus group was infected with CVB3 of 50％ tissue culture infective dose (TCID50).However,the control group was cultured by 2 g/L fetal bovine serum.(2) For the serum starvation method,HeLa cells were cultured with the medium without fetal bovine serum for 24 h.Then the virus group was infected with CVB3 of TCID50.The cells in control group were cultured by 2 g/L fetal bovine serum.Cell morphology changes were observed by inverted microscope,and the expressions of the mTOR,p70S6K mRNA were detected with Real-time PCR at 3 h,6 h,9 h,12 h,24 h respectively in both conventional culture and serum starvation groups.Results The expressions of mTOR and p70S6K mRNA were lower in the virus group than those in control group at 12 h and the 24 h (all P ＜0.05) in the conventional culture group.And the expressions of mTOR and p70S6K mRNA in the virus group were lower than those in the control group at every time points (all P ＜ 0.05) in serum starvation group.The expressions of mTOR and p70S6K mRNA in group with serum starvation virus and the control groups were higher than those in conventional culture group in all time points,but only the expressions of mTOR mRNA were significantly different between the 2 groups (all P ＜0.05),however,the expressions of p70S6K mRNA had no significant difference between the 2 groups (all P ＞ 0.05).Conclusion CVB3 may be able to down-regulate the expressions of mTOR and p70S6K mRNA.

Analysis of an investigational result of drinking-water-borne endemic fluorosis in Hebei Province in 2010 / 中国地方病学杂志

Objective To find out the status of drinking-water-borne endemic fluorosis and the effect of preventive measures in Hebei Province,so as to provide a basis to prevent and cure fluorosis.Methods One affected county (city,district) with drinking-water-borne endemic fluorosis was sampled in every city and 10 water improvement projects were investigated in that county.Three villages were taken out in every county.The operating state of the projects,the water fluoride content,and the dental fluorosis of children aged 8-12 and skeletal fluorosis of adults were investigated in these villages.Results A total of 93 projects were investigated,among which 94.6％(88/93) were operating properly and the qualified rate(fluoride content ≤ 1.2 mg/L) of the projects was 54.84％(51/93).Among the 9 large projects,the water fluoride content of 7 projects exceeded 1.2 mg/L.A total of 23 villages with water improvement projects were investigated and only 43.4％ (10/23) of them water fluoride content were lower than 1.2 mg/L.The dental fluorosis rate,the dental fluorosis index and the rate of skeletal fluorosis were 33.2％ (532/1601),0.74 and 5.7％ (66/1155),respectively.In the 7 villages without water improvement projects,2 of them exceeded 2.0 mg/L,but lower than and equal to 4.0 mg/L of water fluorosis and 5 of them were normal(＜ 1.2 mg/L).The dental fluorosis rate,the dental fluorosis index and the rate of skeletal fluorosis were 33.4％ (111/332),0.72 and 2.9％ (10/350),respectively.Conclutions The qualified rate of water improvement projects of fluoride content ≤ 1.2 mg/L is low and the endemic fluorosis is still comparatively serious in Hebei Province.The progress of water improvement projects in the areas with endemic fluorosis should be accelerated and the quality of water improvement projects should be increased.