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1.
Chinese Journal of School Health ; (12): 756-758, 2021.
Article in Chinese | WPRIM | ID: wpr-877147

ABSTRACT

Objective@#To explore the characteristics of pain sensitivity of autism spectrum disorder (ASD), and to provide reference for clinical comprehensive intervention of ASD.@*Methods@#A case-control study was conducted to investigate the characteristics of pain sensitivity in 142 ASD children and 142 normal children using the items related to pain sensitivity in the Autism Treatment Evaluation Checklist (ATEC). In addition, two recognized ASD model mice (BTBR mice and model mice induced by VPA) were selected as experimental group. The thermal pain threshold and mechanical pain threshold of BTBR mice were measured by electroshock seizure threshold and Von Frey filament test, and the differences of pain characteristics between BTBR mice and control mice were compared, the thermal pain threshold of model mice induced by VPA (VPA rats) was measured by electroshock seizure threshold, and the differences between BTBR mice and control mice (Con) were compared.@*Results@#There was significant difference in pain sensitivity between ASD group and control group (χ 2=0.81,P<0.05), and the sensitivity of ASD children to pain was significantly lower than that of normal control children. The pain sensitivity of BTBR mice and C57BL/6 mice on the 42 nd day after birth was measured. The T-test analysis showed that the time taken for BTBR and C57BL/6 mice to retract their feet on the 42 nd day after birth (3.62±0.38,3.02±0.33)s (t=3.28,P<0.01), and the mechanical pain threshold (9.75±3.58,0.55±0.93)s (t=7.44,P<0.01). The detection of thermal stinging pain in VPA rats and con rats on the 9 th, 11 th, 13 th and 15 th day after birth was detected. The results of t test were as follows:P9(11.34±1.38,9.81±1.64)g, P11(11.37±1.98,9.36±1.11)g, P13(11.53±1.38,9.51±1.01)g and P15(12.05±2.91,8.74±1.60)g (t=-2.79,-2.25,3.95,3.95,P<0.05).@*Conclusion@#Compared with normal control children, ASD children show insensitivity to pain which is further supported by two types of animal models for ASD.

2.
Article in Chinese | WPRIM | ID: wpr-771508

ABSTRACT

To explore the mechanism of β-carboline alkaloids inhibiting the migration and invasion of SGC-7901 cells and its correlation with FAK gene expression,CCK-8 method was used to determine the inhibitory rate of β-carboline alkaloids on the proliferation of gastric cancer SGC-7901 cells under different concentrations.The effect of β-carboline alkaloids on the migration and invasion of SGC-7901 cells was used by Transwell compartment.Detection of mRNA and protein expression of FAK genes were used by qRT-PCR and Western blot.Then si-FAK-1051 recombinant plasmid was transfected into SGC-7901 cells.FAK gene silencing effect was identified by qRT-PCR and Western blot technique again.Finally,the effects of FAK gene silencing on proliferation and migration of gastric cancer SGC-7901 cells were detected by CCK-8 kit and Transwell chamber assay respectively.With the increase of the concentration ofβ-carboline alkaloids,the inhibitory rate of SGC-7901 cells in human gastric cancer cells increased gradually,with IC5013.364 mg·L-1.The number of SGC-7901 cells of Transwell compartment in the positive experimental group(5-FU,5 mg·L-1) and the β-carboline alkaloids group decreased significantly(P<0.01) and the number of SGC-7901 cells in the β-carboline alkaloids group was significantly lower than that in the positive experimental group(P<0.01).Compared with the blank control group,the mRNA and protein expression level of FAK genes in the positive experimental group was significantly lower than that in the experimental group of β-carboline alkaloids(P<0.05).After transfection of si-FAK-1051 into gastric cancer SGC-7901 cells,the expression of mRNA and protein of FAK gene was significantly down regulated(P<0.05).SGC-7901 cell proliferation and cell migration ability also decreased significantly(P<0.05).β-carboline alkaloids are more effective than 5-FU in inhibiting migration and invasion of gastric cancer SGC-7901 cells,and the mechanism may be related to the inhibition of mRNA and protein expression of FAK gene by β-carboline alkaloids.


Subject(s)
Alkaloids , Pharmacology , Carbolines , Pharmacology , Cell Line, Tumor , Cell Movement , Cell Proliferation , Focal Adhesion Kinase 1 , Genetics , Gene Expression Regulation, Neoplastic , Gene Silencing , Humans , Neoplasm Invasiveness , Stomach Neoplasms , Drug Therapy , Pathology
3.
Article in Chinese | WPRIM | ID: wpr-777958

ABSTRACT

@# Objective To understand the awareness of AIDS related knowledge, high risk behaviors, the infection status of HIV, syphilis and HSV-2, and to explore the associated factors with HSV-2 infection among whoremasters in Kaiyuan City, so as to provide scientific evidence for targeted intervention to prevent and control HIV and other STDs. Methods A self-designed questionnaire survey was conducted among whoremasters recruited through outreach activities and snowball sampling. The blood and urine were also collected for corresponding laboratory examination. Results Among the whoremasters, 98.22% had a high awareness of AIDS related knowledge, 9.33% once used drugs, and 14.67% did not use a condom during the latest commercial sex. 62.22% of the whoremasters ever had non-marital sex partners, and of those who had sex with non-marital sex partners in the past year, 59.55% reported using condoms inconsistently. The total infection rate of HIV/syphilis/HSV-2 was 18.22% and the infection rates of HIV, syphilis and HSV-2 were 3.11%, 1.33% and 16.44%, respectively. The older whoremasters were more likely to have a higher HSV-2 infection rate (AOR=1.044,95%CI:1.016-1.073,P=0.002), and those whoremasters not using a condom during the latest commercial sex were more likely to have a higher HSV-2 infection rate (AOR=3.125,95%CI:1.229-7.945,P=0.017). Conclusions Though whoremasters in Kaiyuan City had a high awareness of AIDS related knowledge, they had high-risk behaviors and relatively high HIV and other STDs infection rates. Targeted interventions are needed to improve the risk awareness of STDs infection to promote consistent condom use in both commercial and non-marital sexual behaviors among whoremasters.

4.
Article in Chinese | WPRIM | ID: wpr-776056

ABSTRACT

Objective To explore the associations of non-alcoholic fatty liver disease(NAFLD)with the prevalence,severity,and prognosis of coronary heart disease(CHD). Methods A total of 512 hospitalized patients undergoing coronary angiography in our department from June 2013 to June 2015 were enrolled.Fatty liver was judged by ultrasound screening,and Gensini score was calculated according to the result of coronary angiography.Then the independent predictors of CHD were analyzed.The association between NAFLD and cardiovascular endpoints was analyzed during prospective follow-up among 276 CHD patients. Results The CHD prevalence was 76.8% in NAFLD group and 50.7% in non-NAFLD group(P=0.000),the number of target vessels was 2(1,3)and 1(1,3)(P=0.019),and the Gensini score was(29.02±27.62)and(24.04±20.18)(P=0.022),respectively.NAFLD was an independent predictor of CHD(OR=2.28,95%CI=1.54-3.56,P0.1).Cox regression analysis showed that NAFLD was not a predictor of cardiovascular endpoints in patients with CHD(HR=0.95,95%CI=0.62-1.58,P=0.691).Conclusion NAFLD is an independent predictor of CHD,and it is related to severity of coronary artery stenosis.However,it can not predict the clinical outcomes of patients with CHD.


Subject(s)
Coronary Angiography , Coronary Disease , Humans , Non-alcoholic Fatty Liver Disease , Prevalence , Prognosis , Prospective Studies , Risk Factors
5.
Article in Chinese | WPRIM | ID: wpr-774123

ABSTRACT

OBJECTIVE@#To systematically review the effect of probiotic supplementation during pregnancy and infancy in preventing atopic dermatitis in children.@*METHODS@#RevMan5.3 was used to perform a Meta analysis of randomized controlled trials on the effect of probiotic supplementation during pregnancy and infancy in preventing atopic dermatitis in children published between January 2008 and May 2018 across the world. A subgroup analysis was conducted according to the type of probiotics for intervention, follow-up time, time of probiotic supplementation, and study areas.@*RESULTS@#A total of 22 articles were selected, with 3 280 cases in the intervention group and 3 281 cases in the control group. The results of pooled effect size showed that probiotic supplementation during pregnancy and/or infancy significantly reduced the incidence rate of atopic dermatitis (RR=0.81, 95%CI: 0.70-0.93, P2 years (RR=0.74, 95%CI: 0.61-0.90, P<0.05); probiotic supplementation had a significant effect in Australia (RR=0.83, 95%CI: 0.73-0.96, P<0.05) and Europe/the United States (RR=0.74, 95%CI: 0.61-0.91, P<0.05). Heterogeneity was mainly due to follow-up time (I=62.7%) and time of probiotic supplementation (I=53.5%).@*CONCLUSIONS@#Probiotic supplementation during pregnancy and infancy helps to prevent atopic dermatitis in children, and mixed Lactobacillus-Bifidobacterium intervention has a better effect.


Subject(s)
Bifidobacterium , Child, Preschool , Dermatitis, Atopic , Female , Humans , Infant , Lactobacillus , Pregnancy , Probiotics
6.
Article in Chinese | WPRIM | ID: wpr-801752

ABSTRACT

In recent years, near-infrared spectroscopy has developed into an analytical technique widely used in various fields. Because of its advantages of fast, green and non-destructive, it plays an increasingly prominent role in the field of traditional Chinese medicine (TCM) analysis. However, due to the complexity and overlap of spectra, near-infrared spectroscopy needs to be combined with chemometrics for analysis and calculation. The principle, application scope, advantages and limitations of near infrared spectroscopy and chemometrics are summarized in detail, in addition, their combined applications in the identification of the origin, authenticity, processed products, composition prediction and water content detection of TCM are reviewed. The authors discussed and analyzed the joint application of near-infrared spectroscopy and chemometrics in the field of TCM analysis, and summarized the unique advantages of the combined technology in the field of TCM, which had certain guiding significance for medical workers to better use this technology.

7.
Article in Chinese | WPRIM | ID: wpr-690333

ABSTRACT

Objective To explore the relationship between serum uric acid (SUA) level and coronary heart disease(CHD) in male and female patients. Methods A total of 760 hospitalized patients undergoing coronary angiography in our department from June 2013 to June 2017 were enrolled. Gensini score was calculated according to the result of coronary angiography,and SUA was tested.Patients were divided according to SUA quartiles. The relationship between SUA level and the prevalence of CHD in male and female patients was analyzed. Results Among females,there was significant difference in SUA level between patients with and without CHD (t=4.415,P=0.000). Univariate logistic regression analysis showed that SUA level was independently associated with CHD (OR=1.32,95%CI:1.12-1.58,P=0.002). The prevalence of CHD was 31.2%,52.6%,47.4%,and 59.7%,respectively,in four quartile groups (χ=13.652,P=0.003);in addition,female patients displayed significantly higher prevalence of CHD in the quartile 2 (P=0.007),3(P=0.038),and 4(P=0.000) groups than in quartile 1 group. Among female patients with CHD,there were significant differences in number of target vessels (Z=4.627,P=0.008),number of lesion vessels (χ=18.522,P=0.005),and Gensini score (Z=3.683,P=0.029) in four groups. The Gensini scores of coronary artery were significantly higher in the quartile 4 group than in quartile 1 (P=0.012) and 2 (P=0.014) groups. Multiple linear regression analysis showed that there was a dose-response relationship between SUA level and Gensini score (B=1.105,SE=0.365,P=0.003). Among males,however,there was no significant difference in SUA level between patients with and without CHD(t=1.271,P=0.205). The prevalence of CHD in four quartile groups was 77.9%,69.0%,61.7%,and 79.6%,respectively,showing no significant difference(χ=4.514,P=0.211). Conclusion sSUA is an independent risk fact for female CHD patients. High SUA level is correlated with severity of CHD only in women.

8.
Chinese Medical Journal ; (24): 2439-2446, 2018.
Article in English | WPRIM | ID: wpr-690190

ABSTRACT

<p><b>Background</b>Standard automated perimetry does not sufficiently detect early open-angle glaucoma (OAG) in the clinic. New visual function tests for early glaucoma damage are therefore needed. The present study evaluated whether an isolated-check visual evoked potential (icVEP) could be used to detect visual function abnormalities in early-stage OAG and to explore potential related factors.</p><p><b>Methods</b>This was a cross-sectional study. Thirty-seven OAG patients with early-stage visual field loss (mean deviation ≥ -6.00 dB) detected by the Humphrey Field Analyzer (30-2 SITA program) and 26 controls were included in this study. Optical coherence tomography (OCT) was used to detect retinal nerve fiber layer (RNFL) defects. The icVEP preferentially evaluates the magnocellular-ON pathway. VEPs were recorded and signal-to-noise ratios (SNRs) were derived based on multivariate analysis. Eyes that yielded an SNR ≤1 were considered abnormal. Receiver operating characteristic (ROC) curve analysis was used to estimate the accuracy of group classification. Correlations between SNRs and related factors were analyzed.</p><p><b>Results</b>Based on an SNR criterion of 1, the icVEP had a sensitivity of 62.2% and a specificity of 92.3% for diagnosing early-stage OAG with 74.6% classification accuracy. The ROC curve analysis, however, suggested that an SNR criterion of 0.93 would produce the highest classification accuracy (77.3%). Both RNFL thinning in the temporal superior quadrant on OCT and number of abnormal test points in the central 11° visual field (pattern deviation, P < 0.5%) significantly correlated with the SNR (P < 0.05).</p><p><b>Conclusions</b>The icVEP detected visual function abnormalities in approximately 3/5 of eyes with early-stage OAG with greater than 90% specificity. SNR correlated with both a decrease in RNFL thickness and severity of central visual field loss.</p>

9.
Article in Chinese | WPRIM | ID: wpr-706259

ABSTRACT

Alzheimer disease (AD) is the most common cause of dementia in the aging people.The early diagnosis is very important to slow down the progression and improve the prognosis of AD.At present,most researches focus on the subjective cognitive decline (SCD),which is considered as the preclinical stage of AD.The use of biological markers to predict whether the progress of SCD to AD is necessary.The progresses of imaging studies on SCD were reviewed in this article.

10.
Journal of Practical Radiology ; (12): 1005-1008, 2016.
Article in Chinese | WPRIM | ID: wpr-496518

ABSTRACT

Objective To investigate the association between brain structure abnormalities and neuropsychology impairment in CAD patients.Methods Nineteen patients with CAD and 1 7 healthy adults were examed with MRI,and T1 WI,T2 WI,FLAIR,DWI and DKI image were performed,and then comparing the acquired MRI findings between two groups.Results Significant differences were observed for MK values in splenium and body of the corpus callosum,left cerebellar hemisphere and amygdala cerebelli.MK values of CAD group were lower than those of healthy group in these regions,and differences were statistically significant(P <0.05). There were significant correlation between MK values of the left amygdala cerebelli and MoCA scores in CAD group.Conclusion DKI could detect the changes of brain tissue microstructure in CAD patients early.The correlation between MK and neuropsychologi-cal function provides an important basis for early diagnosis and treatment.

11.
Journal of Practical Radiology ; (12): 368-371, 2015.
Article in Chinese | WPRIM | ID: wpr-460435

ABSTRACT

Objective To analyse the MRI characteristics of the chronic clicking temporomandibular joints(TMJs).Methods 20 TMJs in 10 young chronic clicking individuals (12 clicking TMJs)and 60 TMJs in 30 young healthy volunteers were examined by MRI scanner, and sagittal oblique opened-mouth and closed-mouth position images were observed.Then comparing the MRI findings of the acquired j oints between two groups.Results The ratio of the non-double concave articular disc,slightly high signal intensity in the articular disc, abnormal changes of the condyle,articular fluid,anterior displacement of the articular disc,and increasedDraceangles in the clicking group were significantly higher than those in the control group(P<0.05).The result revealed statistically significant differences.Conclusion The MRI anatomical characteristics can be an indicator for the TMJ anomalys,and provide an obj ective radiological basis for clinical diagnosis and treatment to some extent.

12.
Journal of Medical Biomechanics ; (6): E125-E130, 2015.
Article in Chinese | WPRIM | ID: wpr-804438

ABSTRACT

Objective In order to fully reconstruct the accident by utilizing pedestrian injuries information gained from the car-pedestrian collision, a new method based on finite element simulation and genetic neural network to deduce the car-pedestrian collision parameters in reverse is proposed. Methods Crash simulations from different contact angles (back, left, front, right) at different impact speeds (25, 40, 55 km/h) were conducted by using Hyperworks and LS-DYNA, so as to obtain the head injury criterion (HIC) value and the maximum velocity of the thoracic wall. According to the criteria of injury biomechanics, the severities of the pedestrian head and thorax and corresponding injury locations were analyzed and set as predictors, and the predictive values of collision parameters were then acquired by using genetic neural network. Finally, this method was verified by two car-pedestrian accidents with the video and exact collision parameters. Results For both cases of the car-pedestrian accidents, the car speeds at the collision of pedestrian were 54 and 49 km/h, respectively, and the car-pedestrian contact angles were both 180°. While according to the pedestrian injuries information, the predictive values of the car speeds at the collision of pedestrian were 51 and 43 km/h, and the predictive values of the car-pedestrian contact angles were 184° and 169°, respectively. The reconstruction accuracies of two cases were 0.94 and 0.88. Conclusions The proposed method in the study can be used to predict car-pedestrian collision parameters efficiently and accurately by utilizing the pedestrian injuries information, which provides a new method for cause analysis and responsibility recognition, as well as theoretical references for the treatment and protection of head and thoracic injuries occurred in the car-pedestrian collision.

13.
Chinese Journal of Endemiology ; (12): 729-732, 2015.
Article in Chinese | WPRIM | ID: wpr-480257

ABSTRACT

Objective To comprehensively study the oxidative stress of bone tissue in rats with chronic fluorosis treated with anti-oxidant,the oxidative damage of lipid,protein and DNA.Methods Forty Wistar rats weaned 2 weeks were randomized by weight and divided into 4 groups according to body weight,control group (treated with tap water) and 3 NaF (sodium fluoride) exposure groups (treated with NaF at 50,150 and 250 mg/L),5 female rats and 5 male rats in each group.NaF was given through drinking water.After 6 months of treatment,a 12-hour urine samples were collected,then rats were killed,serum was collected,right rear tibiofibula was separated.Bone and urinary fluoride content and incidence rate of dental fluorine were studied and the levels of bone tissue suppression function of hydroxy free radical,superoxide dismutase (SOD),catalase (CAT),glutathione peroxidase (GSH-Px),8-hydroxydeoxyguanosine (8-OHdG),protein carbonyls (PCO),and malonaldehyde (MDA) were assayed.Results ① Results of suppression function of hydroxy free radical:The difference of bone tissue suppression function of hydroxy free radical among control [(22.99 ± 4.31)U/mg prot],low-excess dose [(22.76 ± 8.11)U/mg prot],medium-excess dose [(13.47 ± 4.56)U/mg prot] and high-excess dose [(19.40 ± 5.92)U/mg prot] groups was statistically significant (F =5.01,P <0.05).②Results of SOD:The difference of bone tissue SOD among control [(5.06 ± 1.16)U/mg prot],low-excess dose [(5.32 ± 1.18)U/mg prot],medium-excess dose [(3.71 ± 0.72)U/mg prot] and high-excess dose [(4.80 ± 1.10)U/mg prot] groups was statistically significant (F =4.44,P <0.05).③ Results of CAT:The difference of bone tissue CAT among control [(25.20 ± 5.91)U/mg prot],low-excess dose [(22.53 ± 7.10) U/mg prot],medium-excess dose [(17.96 ± 4.71)U/mg prot] and high-excess dose [(19.52 ± 5.52)U/ mg prot] groups was statistically significant (F =2.85,P <0.05).④Results of GSH-Px:The differences of bone tissue GSH-Px among control [(52.86 ± 12.88)U/mg prot],low-excess dose [(70.05 ± 15.72)U/mg prot],medium-excess dose [(51.55 ± 6.97)U/mg prot] and high-excess dose [(57.47 ± 10.99) U/mg prot] groups was statistically significant (F =4.89,P <0.05).⑤Results of PCO:The differences of bone tissue PCO among control [(58.73 ± 20.86)ng/L],low-excess dose [(89.41 ± 26.20)ng/L],medium-excess dose [(97.07 ± 22.24)ng/L] and highexcess dose [(83.96 ± 29.55)ng/L] groups was statistically significant (F =4.43,P <0.05).⑥Results of 8-OHdG:The differences of bone tissue 8-OHdG among control [(87.66 ± 6.32)ng/L],low-excess dose [(86.31± 6.30)ng/L],medium-excess dose [(92.17 ± 4.28)ng/L] and high-excess dose [(88.02 ± 6.14)ng/L] groups was not statistically significant (F =1.88,P > 0.05).⑦Results of MDA:The differences of bone tissue MDA among control [(3.70 ± 1.73) nmol/mg prot],low-excess dose [(2.10 ± 0.95)nmol/mg prot],medium-excess dose [(3.32± 2.20)nmol/mg prot] and high-excess dose [(2.71 ± 2.18)nmol/mg prot] groups was not statistically significant (F =1.37,P > 0.05).Conclusions The activity of SOD and CAT of bone tissue are inhibited and suppression function of hydroxy free radical is decreasing under fluorosis influence,which results in protein damage.Oxidative stress is considered to be one of the mechanisms of skeletal fluorosis.

14.
Article in Chinese | WPRIM | ID: wpr-321363

ABSTRACT

<p><b>OBJECTIVE</b>To study the molecular action mechanism of active constituents desoxyrhaponticin (DES) and human serum albumin (HSA).</p><p><b>METHOD</b>Under the simulated physiological condition, computer analog technology, fluorescent spectrometry and ultraviolet spectrum were combined to study the binding mechanism between drug and protein.</p><p><b>RESULT</b>Molecular modeling was adopted to establish the binding model between DES and HSA, suggesting that the interaction force maintaining drug and protein is mainly the hydrophobic interaction with a hydrogen-bond interaction. The results from spectroscopy indicated that the interaction between DES and HSA is a dynamic binding process with a high intensity. The value of the binding distance (r) between DES and HSA was low, which demonstrate the occurrence of energy transfer. DES made an impact on HSA' structural domain microcell conformation, which resulted in hydrophobic changes in binding areas. According to the fluorescent phase diagram technical analysis, the changes in the DES-HSA reaction conformational pattern showed a "two-state" model. According to the obtained thermodynamic parameters for the DES-HSA interaction, the interactional force between DES and HSA was mainly a hydrophobic interaction. The fluorescence polarization proved that a non-covalent compound was generated during the interaction between DES and HSA.</p><p><b>CONCLUSION</b>The spectrum experiment showed consistent results with the computer analog technology, which could provided certain reference for studies on the interaction between DES and HSA.</p>


Subject(s)
Humans , Models, Molecular , Protein Binding , Protein Conformation , Serum Albumin , Chemistry , Metabolism , Spectrometry, Fluorescence , Spectrophotometry, Ultraviolet , Stilbenes , Metabolism , Thermodynamics
15.
Article in English | WPRIM | ID: wpr-270585

ABSTRACT

<p><b>OBJECTIVE</b>To estimate the daily intake of DEHP among workers in flavoring factories.</p><p><b>METHODS</b>71 workers in two flavoring manufacturers, 27 administrators in those factories and 31 laboratory technicians in a research institute were recruited and assigned to exposure group, control group 1 and control group 2 respectively. Their urinary DEHP metabolites, mono(2-ethylhexyl) phthalate (MEHP), mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP), were detected by isotope dilution-ultra performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS). The urinary metabolites concentrations were converted into DEHP intake levels using two pharmacokinetic models: the urine creatinine-excretion (UCE) one and the urine volume (UV) one.</p><p><b>RESULTS</b>No significant differences were found among the three groups. Based on the urinary concentrations of Σ₃MEHP, we got a median daily DEHP intake of 3.22 or 1.85 μg/kg body-weight/day applying the UV or UCE models respectively. Depending on the UV model, three subjects (2.34%) exceeded the RfD value given by US EPA and the P₅₀ of estimate daily DEHP intakes accounted for 16.10% of the RfD value. No subjects exceeded the limitation depending on the UCE model.</p><p><b>CONCLUSION</b>The workers in flavoring factories were not supposed to be the high DEHP exposure ones and their exposure level remained at a low risk.</p>


Subject(s)
Adult , Diethylhexyl Phthalate , Urine , Flavoring Agents , Humans , Occupational Exposure , Young Adult
16.
Article in Chinese | WPRIM | ID: wpr-314947

ABSTRACT

<p><b>OBJECTIVE</b>To analyze and compare molecular mechanisms of active ingredients of honeysuckle (chlorogenic acid, CGA) with bovine lactoferrin (BLF) or bovine serum albumin (BSA).</p><p><b>METHOD</b>The spectral experiment and the computer analog technology were combined to determine the binding parameters, energy transfer parameters and thermodynamic functions between CGA and proteins, study the molecular mechanism, and compare the differences in interactive mechanism between CGA and BLF or BSA.</p><p><b>RESULT</b>The interactive mechanism between CGA and BLF or BSA was a dynamic molecular mechanism, whereas the static quenching mechanism existed between the interaction of CGA and BSA, with differences in the bonding intensity due to difference temperature. The binding distance r between CGA and BLF/BSA was very short, indicating the phenomenon of energy transfer. The results of the molecular modeling showed that the main interaction force between CGA and BLF or BSA was hydrogen bonds, together with Van der Waals' forces and hydrophobic effect.</p><p><b>CONCLUSION</b>The computer analog shows consistent results with spectral experiment.</p>


Subject(s)
Absorption , Animals , Cattle , Drugs, Chinese Herbal , Chemistry , Metabolism , Humans , Hydrophobic and Hydrophilic Interactions , Lactoferrin , Chemistry , Metabolism , Lonicera , Chemistry , Models, Molecular , Protein Binding , Protein Conformation , Serum Albumin, Bovine , Chemistry , Metabolism , Thermodynamics
17.
Article in English | WPRIM | ID: wpr-320368

ABSTRACT

<p><b>OBJECTIVE</b>To evaluate the combined subchronic toxicity of bisphenol A (BPA) and dibutyl phthalate (DBP) in male Sprague Dawley (SD) rats.</p><p><b>METHODS</b>Forty 4-week-old male rats weighing 115-125 g were randomly divided into BPA-treated, DBP-treated group, BPA+DBP-treated and control groups and fed with a soy- and alfalfa-free diet containing 285.4 ppm BPA, 285.4 ppm DBP, 285.4 ppm BPA plus 285.4 ppm DBP, and a control diet, respectively, for 90 consecutive days. At the end of the study, the animals were sacrificed by exsanguination via the carotid artery under diethyl etherane aesthesia and weighed. Organs, including liver, kidneys, spleen, thymus, heart, brain, and testis underwent pathological examination. The androgen receptor (AR), gonadotropin-releasing hormone receptor (GNRHR), and progesterone hormone receptor (PR) genes from the hypothalamus were detected by real-time PCR. The biomedical parameters were analyzed.</p><p><b>RESULTS</b>No significant difference was found in food intake, body weight, tissue weight, organ/brain weight ratio, and biomedical parameters among the four groups (P>0.05). However, BPA and DBP up-regulated AR, PR and GNRHR expression levels in rats and showed a synergistic or an additive effect in the BPA+DBP group.</p><p><b>CONCLUSION</b>The combined subchronic toxicity of BPA and DBP is synergistic or additive in male SD rats.</p>


Subject(s)
Animals , Benzhydryl Compounds , Toxicity , Body Weight , Dibutyl Phthalate , Toxicity , Drug Interactions , Eating , Environmental Pollutants , Toxicity , Male , Phenols , Toxicity , Random Allocation , Rats , Rats, Sprague-Dawley
18.
Article in Chinese | WPRIM | ID: wpr-269216

ABSTRACT

Objective To study the epidemiological characteristics on the clustering nature of pandemic (H1N1) 2009 in China.Methods Time and place distribution of pandemic (H1N1) 2009on the nature of clustering through data from Public Health Emergency Management Information System were described.Results As of August 10,2010,2773 pandemic (H1N1) 2009 clusters,a total of 77363 cases (including 20 deaths) were reported in the mainland of China.The most reported number of clusters was from schools and kindergartens with the total number of 2498 (accounted for 90.08% of the total number).Middle schools appeared the have the most clusters (1223,accounting for 48.96% ).The number of clusters reported in the southern provinces (cities) accounted for 77.03% of the total,and was more than that in the northern provinces (cities).Two reported peaks in the southern provinces (cities) were in June and November,2009,respectively.There was only one reported peakin the northern provinces in September,2009.Conclusion Time and place distribution characteristics on the clusters of pandemic (H1N1) 2009 were similar to the seasonal influenza,but the beginning of winter peak was much earlier and intensity of reporting was much higher on the clusters of pandemic (H1N1 ) 2009 than that of seasonal influenza.

19.
Article in Chinese | WPRIM | ID: wpr-266131

ABSTRACT

<p><b>OBJECTIVE</b>To conduct a quantitative risk assessment for Listeria monocytogenes in bulk cooked meat products in China.</p><p><b>METHODS</b>The data on the contamination level of Listeria monocytogenes in cooked meat products was from national foodborne disease surveillance network, involving a total of 841 samples. All the samples were detected by a qualitative method and 97 samples among them were detected using a quantitative method. The intake data of cooked meats was from Chinese National Nutrition and Health Survey in 2002 and population data in the monitoring sites was collected from National Bureau of Statistics in 2008 to estimate the composition of the population of different ages, which would be the base of assessing the probability of listeriosis in the different subpopulations. Using @Risk software to estimate the risk of listeriosis caused by consuming deli meats for different subpopulation (0 - 4 years old, 5 - 64 years old and 65 years and older) by quantitative risk assessments which involved hazard identification, hazard characterization, exposure assessment and risk characterization and conduct sensitivity analysis.</p><p><b>RESULTS</b>The contamination level of Listeria monocytogenes in the most of samples (96.08%, 808/841) was less than 3 MPN/g (0.5 lg MPN/g), and the average concentration of Listeria monocytogenes was -0.61 lg CFU/g (90%CI: -1.22 - 0.46 lg CFU/g). Estimated servings of cooked meat consumption for 0 - 4, 5 - 64 and 65 years and older were 5.52 × 10(9), 8.99 × 10(10), 1.01 × 10(10), respectively. Estimated number of cases (median) of listeriosis each year per million people caused by consuming cooked meats in young (0 - 4 years old), intermediate age (5 - 64 years old) and elderly (65 years and older) population were 5.53 × 10(-3), 1.72 × 10(-4), 7.57 × 10(-3), respectively. Results of sensitivity analysis showed that contamination level at retail, serving size of cooked meats, storage time at home, storage temperature and ERG at 5°C were positive factors for the risk of listeriosis (r value was 0.607, 0.408, 0.339, 0.259, 0.183 respectively, P < 0.05).</p><p><b>CONCLUSION</b>Cooked meat products in bulk is a risk food, which could cause listeriosis. Contamination level of Listeria monocytogenes in cooked meat products in bulk is the top risk factor for the listeriosis.</p>


Subject(s)
Adolescent , Adult , Aged , Child , Child, Preschool , Colony Count, Microbial , Food Contamination , Food Microbiology , Humans , Infant , Listeria monocytogenes , Meat Products , Microbiology , Middle Aged , Models, Theoretical , Risk Assessment , Software , Young Adult
20.
Article in Chinese | WPRIM | ID: wpr-266130

ABSTRACT

<p><b>OBJECTIVE</b>To study main risk factors that cause foodborne diseases in food catering business.</p><p><b>METHODS</b>Data from references and investigations conducted in food catering units were used to establish models which based on @Risk 4.5 with Monte Carlo method referring to food handling practice model (FHPM) to make risk assessment on factors of food contamination in food catering units. The Beta-Poisson models on dose-response relationship to Salmonella (developed by WHO/FAO and United States Department of Agriculture) and Vibrio parahaemolyticus (developed by US FDA) were used in this article to analyze the dose-response relationship of pathogens.</p><p><b>RESULTS</b>The average probability of food poisoning by consuming Salmonella contaminated cooked meat under refrigeration was 1.96 × 10(-4) which was 1/2800 of the food under non-refrigeration (the average probability of food poisoning was 0.35 at room temperature 25°C). The average probability by consuming 6 hours stored meat under room temperature was 0.11 which was 16 times of 2 hours storage (6.79 × 10(-3)). The average probability by consuming contaminated meat without fully cooking was 1.71 × 10(-4) which was 100 times of consuming fully cooked meat (1.88 × 10(-6)). The probability growth of food poisoning by consuming Vibrio parahaemolyticus contaminated fresh seafood was proportional with contamination level and prevalence.</p><p><b>CONCLUSION</b>The primary contamination level, storage temperature and time, cooking process and cross contamination are important factors of catering food safety.</p>


Subject(s)
Disease Outbreaks , Food Handling , Methods , Food Microbiology , Food Services , Foodborne Diseases , Epidemiology , Models, Theoretical , Risk Assessment , Risk Factors , Software
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