ERS is a kind of universal existence in various cellular stress response.Recently, the research shows that ERS may affect bone metabolism balance from different ways.However, the specific mechanism is still not clear.The relationship between ERS and osteoporosis needs further research.This article will firstly introduce the pathways of ERS, then the relationship between the ERS and osteoporosis will be discussed from pancreatic beta cells, osteoblasts, osteoclasts and mesenchymal stem cells.Lastly, I will give perspectives on the future research on treatment of osteoporosis drug.

Objective To investigate the effect of vardenafil on high altitude pulmonary hypertension in rats, and the possible mechanism thereof. Methods Thirty rats were randomly divided into three groups:control group with normal-pres?sure and normal-oxygen (group C), pulmonary hypertension group with low-pressure and low-oxygen (group P), and the group treated by vardenafil in low-pressure and low-oxygen condition (group V). The rats of group P and group V were ex?posed to low-pressure and low-oxygen condition in an auto-modulating hypobaric and hypoxic cabin to simulate 5 000 m high altitude environment (air pressure 50 kPa, oxygen concentration 10%) for 8 hours daily. Vardenafil (1 mg/kg) was given by gastrogavage to rats in group V once daily for 4 weeks, while the isodose distilled water was given by gastrogavage to rats in group C and group P. The mean pulmonary arterial pressure and right ventricular mass index were measured respectively after 4-week treatment. Morphologic changes of peripheral pulmonary artery were detected by light microscope. The serum levels of nitric oxide (NO) and endothelin-1 (ET-1) were detected as well. Results The pulmonary arterial pressure and right ventricular mass index were significantly higher in group P than those of group C and group V (P<0.05). The ratio of vascular medial wall thickness to external diameter (WT%) and the ratio of pulmonary artery wall area to tube area (WA%) were significantly increased in group P than those of group C and group V (P<0.05). Furthermore, the serum level of NO was significantly lower in group P than that of group C and group V, but the serum level of ET-1 was significantly increased compared with that of group C and group V (P<0.05). Conclusion Vardenafil can effectively reduce the pulmonary arteri?al pressure, and attenuate pulmonary vessels and right ventricle remodeling induced by high altitude pulmonary hypertension.

Objective To analyse the CT features of pulmonary echinococcosis and to assess CT value in diagnosing this disease.Methods CT fingings of pulmonary echinococcosis in 35 cases proved pathologically were analyzed retrospectively.Results Pulmonary granulosus echinococcosis was 33 cases including simple hydatid cyst (11 lesions),datugter cyst hydatid (3 lesions),with calcification (1 lesion) ,rupture (11 lesions),merging infection (4 lesions) and rupture into thorax (3 lesions).Pulmonary alveolar echinococcosis was 2 lesions,CT findings apperared as irregular,peripherally scattered more nodules with small vacuoles or calcification and in combination with hepatic alveolar echinococcosis.Conclusion Pulmonary echinococcosis had characteristic features on CT,CT examination can provide more imaging informations for the treatment of pulmonary echinococcosis

Objective To investigate the changes of calcium /calmodulin - dependent protein kinase Ⅱ (CAMKⅡD) gene expression in 3T3 - L1 preadipocyte diffe-rentiation and TNF - ? regulation of CAMKⅡD gene expression on matured adipocytes. Methods 3T3 - L1 preadipocytes were cultured and differentiated into adipocytes. The levels of CAMKⅡD gene mRNA expression at various times were evaluated by RT-PCR. Matured adipocytes were interfered with 0.1,1.0,10.0 ?g/L TNF - ? and the levels of CAMKⅡD gene mRNA expression were evaluated. Results The levels of CAMKⅡD gene mRNA expression in 3T3 - L1 adipocytes were significantly down- regulated at first day, compared with those at zero day (P0. 05). CAMKⅡD gene mRNA expression decreased significantly at 12 hours after treatment with 10.0 ?g/L TNF-?, treatment of matured adipocytes with TNF - ? did not have any regulation role on it. Conclusions CAMKⅡD gene is involved in the differentiation of adipocytes and related to the etiology of obesity. The changes in the level of CAMKⅡD gene mRNA expression during 3T3 - L1 preadipocyte differentiation may contribute to the differentiation and adipogenesis of adipocytes. It seems that TNF - ? does not have any regulation role on the expression of CAMKⅡD genes.

OBJECTIVETo investigate the effects of alcohol intake on penile structure and function in rats.

METHODSThirty adult male Wistar rats were randomly divided into two groups: control group and alcohol intake group. They were administered with 2 mL of normal saline and 40% alcohol solution respectively through gastric tubes every day. Three months later, the animal model of alcohol intake was evaluated by modified Nayagida's method, and the effects of alcohol on the rats were studied by sexual behavior, the number of apomorphine-induced penile erection, level of testosterone in the sera, and the content of penile smooth muscle.

RESULTSThe scores of animal model of alcohol intake evaluated by Nayagida's method were 0.66 +/- 2.05 in the control group and 9.26 +/- 5.50 in the alcohol intake group (P < 0.05), which indicated that an animal model of alcohol intake was successfully established. Sexual behavior, the number of apomorphine-induced penile erection, testosterone level in the sera, and the content of penile smooth muscle of the alcohol intake group were all statistically different as compared with the control group (P < 0.05).

CONCLUSIONAlcohol intake induces sexual dysfunction in rats, which may be due to the decline of testosterone level in the sera and decline of penile smooth muscle.

Animals ; Ethanol ; adverse effects ; Female ; Male ; Penis ; anatomy & histology ; drug effects ; physiology ; Rats ; Rats, Wistar ; Sexual Behavior, Animal ; Testosterone ; blood

Background The domestic and international researches discovered that many proteins and enzymes of the extracellular matrix (ECM) participate in the sclera remodeling by affecting the collagen typeⅠand fibronectin.Objective This study was to investigate the effect of matrixmetalloproteinase-2 (TIMP-2) on expression of collagen typeⅠand fibronectin of ECM in the posterior sclera by injecting liposomes containing tissue inhibitor of TIMP-2 gene into suprachoroidal space of the form-deprivation myopia in guinea pig.Methods Form-deprivation myopia was induced by translucent goggles in 36 clean guinea pig for 2 weeks.Then the animals were randomly assigned to TIMP-2 group,empty plasmid group,saline group and 12 for each group.Liposomes of 5μl containing TIMP-2 gene,empty plasmid and saline were suprachoroidally injected in the right eye respectively,and the left eyes without any treatment were used as self-control group.Other 12 matched guinea pigs only covered the right eyes through out the experimental duration as model control group.The guinea pigs were sacrificed and the posterior sclera tissue of the eyeballs were collected at 2,7 and 14 days after injection of drug.The expressions of collagen typeⅠmRNA and fibronectin mRNA were detected by semi-quantitative reverse transcription polymerase chain reaction (RT-PCR).This study followed the Regulation for the Administration of Affair Concerning Experimental Animals by State Science and Technology Commission.Results The expression level of collagen type Ⅰ mRNA in the posterior sclera of guinea pig was lower but that of fibronectin mRNA was higher in TIMP-2 group than self-control group,showing significant differences between them (P＜0.05).The expression level of collagen type Ⅰ mRNA in the posterior scleral tissue began to increase from the 2nd day after drug injection and was obviously elevated at the 7th day and then gradually decreased at the 14th day.However,the expression level of fibronectin mRNA in the posterior scleral tissue showed the opposite pattern.The expression levels of collagen typeⅠmRNA and fibronectin mRNA at the 7th after drug injection were significantly lower than that at the 2nd day or 14th day (P＜0.01).Conclusion Suprachoroidal injection of TIMP-2 in form-deprivation myopia could up-regulate the expression of collagen typeⅠmRNA and down-regulate the expression of fibronectin mRNA in the posterior scleral tissue.It may slow down the sclera remodeling of form-deprivation myopia in guinea pig in the early stage.

Background Researches showed that transforming growth factor-β2 (TGF-β2) promotes the activity of human Tenon capsular fibroblasts (TFs),which plays a role in the scarring of filtering blebs after antiglaucoma surgery.However,its mechanism is not fully clear.Lysyl oxidases (LOXs) are important extracellular matrix proteases which can catalyze the cross-linking of collagen and elastin.Investigating the impact of TGF-β2 on the expression of LOXs has a great significance for the understanding of the pathogenesis of filtering bleb scarring and its prevention.Objective This study was to investigate the effect of TGF-β2 on the expression of LOXs in cultured human TFs.Methods The TFs at 4-8 generations were divided into normal control group and different concentrations of TGF-β2 treated-groups,and 100,200,400,800 μ1 of TGF-β2 with the final concentration of 2,4,8 and 16 ng/ml was added into the medium to treat human TFs respectively for 24 hours.The LOXs in the cells were detected by Western blot to determine the optimal dose of TGF-β2.The 4 ng/ml TGF-β2(200 μ1) was used to treat human TFs for 6,12,24 and 48 hours respectively,and the change of LOXs expression in the cells over time was assayed by Western blot.The expression and distribution of LOX protein in the normal cells and TGF-β2-treated cells was detected by using immunofluorescence technique.This study was approved by Daping Hospital of Third Military Medical University Ethic Commission.The guardians of the patients who offered the specimen knew the purpose of the study and signed informed consent.Results Western blot assay showed that the expressions of LOX,LOXL1,LOXL2,LOXL3 and LOXL4 in the cells were gradually elevated from the normal control group and 2,4,8,16 ng/ml TGF-β2-treated groups,showing significant differences among the groups (F =37.338,13.438,31.067,11.767,15.167,all at P＜0.01).The expression of LOXL2 protein in the cells was 0.68±0.07,1.09±0.10,1.32±0.07,1.50± 0.06 and 1.89±0.12 in the normal control group and 6-,12-,24-and 48-hour groups respectively after 4 ng/ml TGF-β2 treatment,with a significant increase over time (F =82.832,P=0.000).The expression of LOX was weak in the normal cultured TFs,while the fluorescence intensity of LOX expression was evidently enhanced in the cytoplasm of the cells in the TGF-β2-treated group.Conclusions TGF-β2 upregulates the expressions of LOXs in human TFs in a dose-and time-dependent manner,which probably offers a basis for the further study on the prevention of filtering bleb scarring after glaucoma surgery.

The China Infectious Disease Automated-alert and Response System (CIDARS) was successfully implemented and became operational nationwide in 2008.The CIDARS plays an important role in and has been integrated into the routine outbreak monitoring efforts of the Center for Disease Control (CDC) at all levels in China.In the CIDARS,thresholds are determined using the'Mean+2SD'in the early stage which have limitations.This study compared the performance of optimized thresholds defined using the'Mean +2SD'method to the performance of 5 novel algorithms to select optimal 'Outbreak Gold Standard (OGS)'and corresponding thresholds for outbreak detection.Data for infectious disease were organized by calendar week and year.The'Mean+2SD',C1,C2,moving average (MA),seasonal model (SM),and cumulative sum (CUSUM) algorithms were applied.Outbreak signals for the predicted value (Px) were calculated using a percentile-based moving window.When the outbreak signals generated by an algorithm were in line with a Px generated outbreak signal for each week,this Px was then defined as the optimized threshold for that algorithm.In this study,six infectious diseases were selected and classified into TYPE A (chickenpox and mumps),TYPE B (influenza and rubella) and TYPE C [hand foot and mouth disease (HFMD) and scarlet fever].Optimized thresholds for chickenpox (P55),mumps (P50),influenza (P40,P55,and P75),rubella (P45 and P75),HFMD (P65 and P70),and scarlet fever (P75 and Ps0) were identified.The C1,C2,CUSUM,SM,and MA algorithms were appropriate for TYPE A.All 6 algorithms were appropriate for TYPE B.C1 and CUSUM algorithms were appropriate for TYPE C.It is critical to incorporate more flexible algorithms as OGS into the CIDRAS and to identify the proper OGS and corresponding recommended optimized threshold by different infectious disease types.

Twenty-one compounds were isolated from the rhizomes of Iris germanica by various chromatographic techniques such as silica gel, ODS and Sephadex LH-20 chromatography. Their structures were established on basis of physical properties, MS and NMR spectroscopic data Their structures were identified as ombuin (1), 5, 3, 3'-trihydroxy-7, 4'-dimethoxyflavanone (2), naringenin (3), cirsiliol-4'-glucoside (4), 3beta, 4'-dihydroxy-7,3'-dimethoxyflavonone-5-O-beta-D-glucopyranoside (5), genistein (6), irilin D (7), muningin (8), 5, 7, 4'-trihydroxy-6, 3', 5'-trimethoxyisoflavone (9), tectorigenin (10), irigenin (11), tectoridin (12), iridin (13), mangiferin (14), irisxanthone (15), pyroglutamic acid (16), 2, 4', 6-trihydroxy-4-methoxybenzophenone-2-O-beta-D-glucoside (17), apocynin (18), androsin (19), beta-sitosterol (20), and daucosterol (21). Among them, compounds 1-9, 16, 17 were obtained from this plant for the first time, compounds 8 and 9 were separated from Iris species for the first time, compounds 1, 4, and 17 were obtained from the family for the first time.
Drugs, Chinese Herbal ; chemistry ; isolation & purification ; Iris Plant ; chemistry ; Molecular Structure ; Rhizome ; chemistry ; Spectrometry, Mass, Electrospray Ionization

Adolescent ; Child ; Child, Preschool ; Chromosomes, Human, Pair 6 ; Female ; Humans ; Infant ; Loss of Heterozygosity ; Male ; Microsatellite Repeats ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; genetics