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1.
Environ Res ; 192: 110289, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-33027626

RESUMO

BACKGROUND: Previous studies have indicated that exposure to green space may benefit human health. However, the available evidence concerning the effects of greenness, especially school-based greenness, on pediatric obesity is scarce. OBJECTIVE: To explore the association between school-based greenness and adiposity in children and adolescents in China. METHOD: We conducted a nationwide cross-sectional study of 56,620 children and adolescents (aged 6-18 years) in seven provinces/municipalities across China. School-based greenness was assessed using satellite-derived Normalized Difference Vegetation Index (NDVI) and Soil Adjusted Vegetation Index (SAVI) within 100-, 500-, and 1000-m circular buffers around each school's address. Generalized linear mixed regression models were used to estimate associations of greenness with BMI z-scores (zBMI), waist circumference, and prevalent overweight/obesity. We also explored the potential mediating role of ambient air pollution and physical activity in the greenness-adiposity associations. RESULT: In the adjusted model, an IQR increase in NDVI-1000m was associated with lower zBMI (ß: -0.11, 95% confidence interval[CI]: -0.13,-0.09) and waist circumference (ß: -0.64, 95%CI: -0.78,-0.50). Consistently, an IQR increase in NDVI-100m, NDVI-500m, NDVI-1000m was associated with 7-20% lower odds of overweight/obesity in the adjusted models. Air pollutants mediated 6.5-29.1% of the association between greenness and zBMI. No significant mediation effect was observed for physical activity. CONCLUSION: Higher school-based greenness levels were associated with lower zBMI, waist circumference, and lower odds of overweight and obesity in children and adolescents. Ambient air pollutants may partially mediate the greenness-adiposity associations.


Assuntos
Adiposidade , Obesidade Infantil , Adolescente , Criança , China/epidemiologia , Cidades , Estudos Transversais , Humanos , Obesidade Infantil/epidemiologia , Instituições Acadêmicas
2.
BMC Public Health ; 20(1): 1892, 2020 Dec 09.
Artigo em Inglês | MEDLINE | ID: mdl-33298006

RESUMO

BACKGROUND: Self-harm and drinking are both serious problems in adolescents and many studies presented evidence of their association. However, gender differences in this association are seldom deeply discussed. Our study aimed to evaluate the prevalence of self-harm and explore its association with drinking behaviors by gender and investigate the extent to which the gender differences exist in the association between self-harm and drinking. METHODS: A total of 32,362 students in grades 7 to 12 in Beijing, China were anonymously surveyed and included in our study using two-stage, stratified probability proportion sampling. Self-harm, drinking behaviors and other basic information were obtained from an anonymous questionnaire. Demographic variables, self-harm and drinking behaviors were analyzed using the Chi-square test and the Gamma test between genders and the gender differences in this association were analyzed by Log-binomial regression. RESULTS: The total prevalence of self-harm was 13.7% with no significant gender difference (χ2 =0.352, P = 0.553). The prevalence of self-harm in girls decreased with age (G = -0.163, P < 0.001). Self-harm was associated with drinking behaviors in both boys and girls. The Log-binomial regression demonstrated that girls in the 16-19 years old group were at lower risk of self-harm than girls in the 12-15 years old group while this association was weaker in boys (1.493 vs 1.128). The higher OR for self-harm was found among girls with early drinking experiences compared with boys (2.565 vs 1.863). Girls who had previously drunk (i.e. drunk at least once) (2.211 vs 1.636), were currently drinking (3.400 vs 2.122) and performed binge drinking (6.357 vs 3.924) were at greater risk of self-harm than boys. CONCLUSION: Among high school students, self-harm has a significant positive association with drinking and girls with drinking behaviors are at higher risk of suffering self-harm. Identifying adolescents' drinking behaviors is of vital importance to self-harm prevention and special attention should be focused on younger girls.


Assuntos
Comportamento Autodestrutivo , Caracteres Sexuais , Adolescente , Pequim/epidemiologia , Criança , China/epidemiologia , Feminino , Humanos , Masculino , Instituições Acadêmicas , Comportamento Autodestrutivo/epidemiologia , Estudantes , Inquéritos e Questionários , Adulto Jovem
3.
Artigo em Zh | MEDLINE | ID: mdl-24053920

RESUMO

OBJECTIVE: To investigate the protective effect of suppressive oligodeoxynucleotides (Sup ODN) on interferon-γ (IFN-γ) and signal transducers and activators of transcription (pSTAT4) expression of Silica-induced pulmonary inflammation in Mice. METHODS: Sixty Balb/c mice were randomly divided into 4 groups, normal control group, silicious group, suppressive oligodeoxynucleotides (Sup ODN) group, control oligodeoxynucleotides (Con ODN) group. Except the normal control group injected normal saline, the rest groups were induced by the intratracheal instillation of 0.1 ml (5 g/L) of sterilized silica suspension. Sup ODN group and Con ODN group were treated by i.p. injection of 0.3 ml (1mg/mL) of suppressive or control ODN 3 h before silica administration. After 7 days, the animals were killed and levels of IFN-γ were detected by ELISA. The pathologic changes in lung tissues of mice were observed with HE staining. Expressions of IFN-γ and pSTAT4 in lung tissue were detected with immunohistochemistry and quantified by Image-Pro Plus 7.0. RESULTS: HE staining showed that the lung tissue of silicious group were damaged seriously than Sup ODN group. Compared with the normal control group (serum: (280.1±41.3) pg/ml, lung tissue: (0.249±0.373), IFN-γ increased in silicious group (serum: (886.3±81.7) pg/ml, lung tissue: (0.270±0.300) (P < 0.05). Compared with the normal control group and Con ODN group [(894.5±91.6) pg/ml], IFN-γ in the serum of Sup ODN group decreased significantly (P < 0.01). Compared with the silicious group , IFN-γ in lung tissue decreased in Sup ODN group (0.241±0.250) (P < 0.05). Compared with the normal control group (0.279±0.353), pSTAT4 in lung tissue increased significantly in silicious group (0.313±0.231) (P < 0.01). Compared with the silicious group, pSTAT4 in lung tissue decreased significantly in Sup ODN group (0.269±0.523) (P < 0.01). CONCLUSION: Sup ODN attained protective effect on Silica treated mice by suppressing expression of IFN-γ and pSTAT4.


Assuntos
Interferon gama/metabolismo , Pulmão/metabolismo , Oligodesoxirribonucleotídeos/farmacologia , Fator de Transcrição STAT4/metabolismo , Dióxido de Silício/toxicidade , Animais , Feminino , Inflamação/metabolismo , Pulmão/efeitos dos fármacos , Pulmão/patologia , Camundongos , Camundongos Endogâmicos BALB C , Fosforilação
4.
Artigo em Zh | MEDLINE | ID: mdl-23433205

RESUMO

OBJECTIVE: To observe the effects of dibutyl phthalate (DBP) and monobutyl phthalate (MBP) on the mRNA and protein expression of insulin-like factor 3 (INSL3) in the Leydig tumor cells (MA-10) of mice and the level of testosterone secreted from MA-10 cells. METHODS: The MA-10 cells of mice, used as a cellular model, were exposed to DBP and MBP. The content of testosterone in the supernatant medium was measured by enzyme-linked immunosorbent assay; the mRNA and protein expression levels of INSL3 in MA-10 cells were measured by quantitative PCR and Western Blot. RESULTS: Compared with the control group, MA-10 cells showed increased synthesis of testosterone when exposed to low concentrations of DBP and MBP (10(-9) ∼ 10(-6) mol/L) and inhibited synthesis of testosterone when exposed to high concentrations of DBP and MBP (10(-3) mol/L), and the typical two-way effects became more significant as the time went one and the concentrations increased (P < 0.05). Compared with the control group, MA-10 cells showed significantly lower mRNA and protein expression levels of INSL3 when exposed to 10(-6) and 10(-4) mol/L DBP (P < 0.05); MA-10 cells showed increased protein expression of INSL3 when exposed to 10(-7) mol/L MBP, and the mRNA and protein expression levels of INSL3 decreased as the concentration of MBP increased. CONCLUSION: DBP and MBP can inhibit the secretion of testosterone from MA-10 cells at high concentrations, but stimulate the secretion of testosterone at low concentrations. Both DBP and MBP have inhibitory effects on the mRNA and protein expression of INSL3 in MA-10 cells.


Assuntos
Dibutilftalato/toxicidade , Insulina/metabolismo , Células Intersticiais do Testículo/efeitos dos fármacos , Ácidos Ftálicos/toxicidade , Proteínas/metabolismo , Testosterona/metabolismo , Animais , Linhagem Celular , Células Intersticiais do Testículo/metabolismo , Masculino , Camundongos
5.
Artigo em Zh | MEDLINE | ID: mdl-22248752

RESUMO

OBJECTIVE: To investigate the clinical efficacy and value of intra-aortic balloon pump (IABP) with vasoactive drugs for septic shock patients. METHODS: A method of single-centre registry was conducted. Data were collected from 78 consecutive septic shock patients in late stage in intensive care unit (ICU) of Beijing Shijitan Hospital diagnosed between July 2006 and October 2010. With the consent of family members of the patients, they were divided into two groups: group A, in whom only vasoactive drugs were used (dopamine + norepinephrine treatment, n = 39), and group B, in whom vasoactive drugs were used combined with IABP (dopamine + norepinephrine + IABP therapy, n = 39). Before and after treatment of two groups, hemodynamic and tissue perfusion monitoring were executed. At the same time, the shock recovery time, the doses of vasoactive drugs, length of ICU stay, and mortality within 28 days were observed. RESULTS: There was no significant difference in all above parameters between two groups. After treatment, heart rate, blood pressure and heart function parameters were significantly improved compared with those before treatment. In group B, mean arterial pressure (MAP, mm Hg,1 mm Hg = 0.133 kPa) 24 hours and 72 hours after IABP, cardiac index [CI, L×min(-1)× m(-2)] after 48 hours of IABP, and in 2 hours after termination of IABP, dopamine dosage [µg×kg(-1)×min(-1)] in 24, 48, 72 hours after IABP and 2 hours after termination were significantly improved than those in group A (MAP: 53.0 ± 6.3 vs. 52.1 ± 6.2, 65.6 ± 4.3 vs. 65.0 ± 2.1; CI: 3.40 ± 0.20 vs. 3.30 ± 0.50, 3.60 ± 0.30 vs. 3.60 ± 0.30; dopamine dosage: 17.5 ± 1.2 vs. 17.6 ± 1.3, 10.2 ± 1.3 vs. 12.8 ± 1.6, 5.8 ± 1.5 vs. 6.8 ± 1.7, 3.0 ± 0.7 vs. 4.1 ± 1.3, P < 0.05 or P < 0.01). Compared with group A, shock recovery time (days) of group B was significantly shorter (10.4 ± 2.2 vs. 14.1 ± 3.4, P < 0.01) than that of group A; mortality within 28 days was significantly lower (34.1% vs. 45.6%, P < 0.01) in group B; length of ICU stay of two groups showed no significant difference between two groups. CONCLUSIONS: IABP in patients with septic shock significantly improved hemodynamics, increased coronary and systemic tissue perfusion, reduced cardiac afterload, elevated CI, reduced doses of vasoactive drugs, shortened length of ICU stay, improved prognosis, and lowered the mortality rate. IABP had important clinical value, and could be recommended as an additional treatment option in patients with septic shock in whom the effect of drug was poor.


Assuntos
Balão Intra-Aórtico , Choque Séptico/cirurgia , Adulto , Dopamina/uso terapêutico , Feminino , Hemodinâmica , Humanos , Masculino , Pessoa de Meia-Idade , Norepinefrina/uso terapêutico , Choque Séptico/fisiopatologia , Resultado do Tratamento
6.
Artigo em Zh | MEDLINE | ID: mdl-22808545

RESUMO

OBJECTIVE: To observe the effects of lead on mRNA and protein expression of PKC in U251 cell line. METHODS: After U251 cells were exposed to 0.05, 0.50, 5.00, 50.00, 500.00, 900.00 and 1000.00 micromol/L Ph(Ac)2 for 24 hours, the cytotoxicity of Pb on U251 cells was measured by MTT assay. RT-PCR and Western blot assay were used to detect the mRNA and protein expression levels of PKC in U251 cells exposed to 0.05, 5.00 and 500.00 micromol/L Ph (Ac), for 24 hours. RESULTS: The survival rates of U251 cells treated with 5.00, 50.00, 500.00, 900.00 and 1000.00 micromol/L Pb (Ac)2 were 84.5%, 78.2%, 76.5%, 50.3% and 43.2%, respectively, which were significantly lower than those of control group (P < 0.01). The PKC mRNA expression level (0.40 +/- 0.01) of U251 cells treated with 500.00 micromol/L Pb (Ac)2 was significantly lower than that (0.51 +/- 0.02) of control group (P < 0.01). The PKC protein expression levels of U251 cells treated with 0.05, 5.00 or 500.00 micromol/L Pb(Ac)2 were 0.68 +/- 0.02, 0.62 +/- 0.01 and 0.33 +/- 0.02, respectively, which were significantly lower (0.98 +/- 0.01) than those of control group (P < 0.01). CONCLUSION: Lead can decline the cell viability, PKC mRNA and protein expression levels of U251 cells.


Assuntos
Chumbo/toxicidade , Proteína Quinase C/metabolismo , Linhagem Celular Tumoral , Sobrevivência Celular , Humanos , RNA Mensageiro/metabolismo
7.
Org Lett ; 24(37): 6789-6793, 2022 09 23.
Artigo em Inglês | MEDLINE | ID: mdl-36094854

RESUMO

Epicoccanes A-D (1-4) are four novel metabolites of an endophytic fungus Epicoccum nigrum. Their distinct unprecedented structures are hypothesized as oxidative dimers of pyrogallol analogues. Compounds 1 and 2 possess a novel spirobicyclo[3.2.1]octane-6,1'-cyclopentane or -cyclohexane core skeleton. Compound 3 is of a unique cage-like pentacyclic system, which unusually contained three continuous spiro-carbons. Compound 4 is a highly rearranged dimer with five contiguous chiral centers. The absolute structures of 1 and 2 were deduced by electronic circular dichroism (ECD) calculations, and those of 3 and 4 were determined by X-ray crystallography. Compounds 1 and 4 showed potential antiliver fibrosis activity.


Assuntos
Ascomicetos , Pirogalol , Ascomicetos/química , Cicloexanos , Ciclopentanos , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Octanos , Estresse Oxidativo
8.
J Psychiatr Res ; 143: 451-461, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34482986

RESUMO

Tourette's syndrome (TS) is a complex neurodevelopmental disorder characterized by high comorbidity. Treatment with psychotherapy is highly recommended, however, there exists limited available evidence on the use and the optimal psychotherapeutic outcome is debatable. We performed a systematic search on several bibliographic databases for randomized controlled trials (RCTs) reporting the use of psychotherapy treatment in TS patients, from inception to August 1st, 2020, and without language restrictions. Outcome measures were measured by the Yale global tic severity scale (YGTSS) to determine the efficacy of psychotherapy. Data were pooled as Standard mean difference (SMD) in the Bayesian analysis of the random effect model. A total of 17 RCTs with 9 treatments and 1042 participants were included from an initial 4901 records. The primary outcome including, Comprehensive behavioral intervention (CBIT) [SMD = -1.43, 95%Credible interval (CrI): -2.39, -0.44], Exposure with response prevention (ERP) [SMD = -1.37, 95%CrI: -2.62, -0.13], Habit reversal therapy (HRT) [SMD = -0.93, 95%CrI: 1.83, -0.05], and Behavior therapy (BT) [SMD = -0.85, 95%CrI: 1.51, -0.18], were found to be significantly lower in the TS group compared with the control group (including wait-list, treatment-as-usual or other named control group). Based on the Surface under the cumulative ranking curve (SUCRA), CBIT (SUCRA value = 86.97%, 95%CrI: 44%, 100%) was found to be a suitable psychotherapeutic treatment for TS patients. High-quality RCTs on psychotherapy are needed to perform for establishing the foundation of the generation of evidence-based guidelines.


Assuntos
Síndrome de Tourette , Terapia Comportamental , Humanos , Metanálise em Rede , Avaliação de Resultados em Cuidados de Saúde , Psicoterapia , Síndrome de Tourette/terapia
9.
Environ Int ; 148: 106383, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33465664

RESUMO

BACKGROUND: The prevalence of metabolic syndrome (MetS) rapidly increased over the past decades. However, little evidence exists about the effects of long-term exposure to ambient air pollution on MetS in children and adolescents. OBJECTIVE: This study aims to assess the association between long-term ambient air pollution and the prevalence of MetS in a large population of Chinese children and adolescents. METHODS: In 2013, a total of 9,897 children and adolescents aged 10 to 18 years were recruited from seven provinces/municipalities in China. MetS was defined based on the recommendation by the International Diabetes Federation (IDF). Satellite based spatio-temporal models were used to estimate exposure to ambient air pollution (including particles with diameters ≤1.0 µm (PM1), ≤2.5 µm (PM2.5), and ≤10 µm (PM10), and nitrogen dioxide (NO2)). Individual exposure was calculated according to 94 schools addresses. After adjustment for a range of covariates, generalized linear mixed-effects models were utilized to evaluate the associations between air pollutants and the prevalence of MetS and its components. In addition, several stratified analyses were examined according to sex, weight status, outdoor physical activity time, and sugar-sweetened beverages (SSBs) intake. RESULTS: The prevalence of MetS was 2.8%. The odds ratio of MetS associated with a 10 µg/m3 increase in PM1, PM2.5, PM10 and NO2 was 1.20 (95%CI: 0.99, 1.46), 1.31 (95%CI: 1.05, 1.64), 1.32 (95%CI: 1.08, 1.62), and 1.33 (95%CI: 1.03, 1.72), respectively. Regarding the MetS components, we observed associations between all pollutants and abdominal obesity. In addition, long-term PM1 and NO2 exposures were associated with the prevalence of elevated fasting blood glucose. Stratified analyses detected that the associations between air pollutants and the prevalence of MetS were stronger in boys (Pinteraction < 0.05). CONCLUSIONS: We found that long-term exposure to PM2.5, PM10, and NO2 were positively associated with the prevalence of MetS in children and adolescents. Our findings may have certain public health implications for some comprehensive strategy of environment improvement and lifestyles changes in order to reduce the burden of non-communicable disease.


Assuntos
Poluentes Atmosféricos , Poluição do Ar , Síndrome Metabólica , Adolescente , Poluentes Atmosféricos/efeitos adversos , Poluentes Atmosféricos/análise , Poluição do Ar/efeitos adversos , Poluição do Ar/análise , Criança , China/epidemiologia , Cidades , Estudos Transversais , Exposição Ambiental/efeitos adversos , Exposição Ambiental/análise , Humanos , Masculino , Síndrome Metabólica/epidemiologia , Síndrome Metabólica/etiologia , Dióxido de Nitrogênio/análise , Material Particulado/efeitos adversos , Material Particulado/análise
10.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 26(2): 134-8, 2009 Apr.
Artigo em Zh | MEDLINE | ID: mdl-19350501

RESUMO

OBJECTIVE: To analyze the expression of genes from chromosomal region 22q11.2 and assess the association between mutation(s) of particular gene(s) from this region and malformations of the urinary system. METHODS: Expression of rat homologs of 33 genes from above region was determined in kidney tissues derived from rats of different fetal development ages (E13, E15, E19) and adulthood with reverse transcriptase-PCR. Potential mutation(s) in candidate gene SNAP29, whose expression pattern appeared to be unique, was screened in 44 patients and 220 normal controls with PCR-single strand conformation polymorphism (SSCP). Suspected positive regions were sequenced to verify the mutations. RESULTS: Nine genes showed no expression throughout the whole development process; 18 genes with various expression levels showed continuous expression from the beginning of development; 6 genes only expressed for a short time, among which SNAP29 was selected for mutation screening. Upon sequencing, three mutations were identified from the 44 patients, including a G to A transition (GAG to AAG) in exon 2, and two A to G transitions (AGC to GGC) in exon 3. CONCLUSION: Through systematic analysis of the expression of genes from chromosomal region 22q11.2, the SNAP29 gene was found to have a potential role in the development of genitourinary system. Two missense mutations were identified in three patients. These included one in exon 2 (featuring cryptorchidism), and the other in exon 3 (featuring cryptorchidism and hypospadia). Neither of the mutations was found in the normal controls. The results suggested that mutation(s) of gene(s) from chromosomal region 22q11.2 may play an important role in the genesis of genitourinary malformations.


Assuntos
Proteínas de Membrana/genética , Proteínas Qb-SNARE/genética , Proteínas Qc-SNARE/genética , Anormalidades Urogenitais/genética , Animais , Análise Mutacional de DNA/métodos , Éxons/genética , Feminino , Humanos , Masculino , Glicoproteínas de Membrana , Camundongos , Complexo Glicoproteico GPIb-IX de Plaquetas , Reação em Cadeia da Polimerase , Polimorfismo de Fragmento de Restrição , Polimorfismo Conformacional de Fita Simples
11.
Artigo em Zh | MEDLINE | ID: mdl-18761789

RESUMO

OBJECTIVE: To observe the effect of chronic lead contaminant on mRNA expression of protein kinase C (PKC) and calmodulin (CaM) in hippocampus of baby rats. METHODS: The Wistar pregnant rats were randomly divided into 3 groups fed with distilled water and lead contained water (0.2% and 1.0% lead acetate) respectively. The lead exposure period was from the 0 day of pregnancy to the day when the offspring weaned. Then the baby rats were fed with lead water the same as their mothers. The cliff avoidance reflex within postnatal day 8 and step down test at postnatal day 50 were performed. Then pups were killed at postnatal day 8 and 50 respectively. Atomic absorption spectrometry was used to determine lead content of rats' brain. RT-PCR was used to observe mRNA expression of PKC and CaM in hippocampus of baby rats. RESULTS: The brain lead content of test groups were much higher than that of the control group. The completion rate of cliff avoidance reflex and the score of step down test of test groups were lower than those in the control group (P < 0.05). Compared with control group, PKC and CaM mRNA expression of chronic lead exposure baby rats in the hippocampus had the down trend (P < 0.05). CONCLUSION: The decrease of PKC and CaM mRNA expression level in hippocampus has a great link with the impairment of learning and memory induced by lead in baby rats, which might be one of the molecule mechanisms of lead induced impairment of learning and memory.


Assuntos
Calmodulina/metabolismo , Chumbo/toxicidade , Proteína Quinase C/metabolismo , Animais , Calmodulina/genética , Feminino , Hipocampo/efeitos dos fármacos , Hipocampo/metabolismo , Aprendizagem/efeitos dos fármacos , Masculino , Memória/efeitos dos fármacos , Proteína Quinase C/genética , RNA Mensageiro/genética , Ratos
12.
Artigo em Zh | MEDLINE | ID: mdl-19257932

RESUMO

OBJECTIVE: To observe the effects of chronic lead exposure on mRNA and protein expression of ASIC1a, ASIC2a, ASIC2b in hippocampus of baby-rats. METHODS: The Wistar pregnant rats were randomly divided into 3 groups fed with distilled water or lead contained water (0.2% and 1.0% lead acetate) respectively, 5 rats in each group. The lead-exposure ranged from the 0 day of pregnancy to the offspring weaned. Then the baby-rats were fed with lead water like their mothers and killed at postnatal day 8 or 50. Atomic absorption spectrometry was used to determine lead content in the brain. RT-PCR and Western blotting were used to observe mRNA and protein expression of ASIC1a, ASIC2a and ASIC2b in their hippocampus respectively. RESULTS: The brain lead content of test groups was higher than that of the control group (P < 0.01), and the lead content of the postnatal day 50 was higher than that in postnatal day 8 (P < 0.01). Compared with the control group, ASIC1a mRNA expression of 1.0% lead exposure in the hippocampus was uptrend (P < 0.01), ASIC1a protein expression of each test group was downtrend (P < 0.05), while for ASIC2a and ASIC2b mRNA and protein, there was no significant differences observed (P > 0.05). CONCLUSION: ASIC1a expression in hippocampus can be changed by chronic lead exposure.


Assuntos
Hipocampo/metabolismo , Chumbo/toxicidade , Proteínas do Tecido Nervoso/metabolismo , Efeitos Tardios da Exposição Pré-Natal/genética , Canais de Sódio/metabolismo , Canais Iônicos Sensíveis a Ácido , Animais , Feminino , Hipocampo/efeitos dos fármacos , Proteínas do Tecido Nervoso/genética , Gravidez , RNA Mensageiro/genética , Ratos , Ratos Wistar , Canais de Sódio/genética
13.
Artigo em Zh | MEDLINE | ID: mdl-19358756

RESUMO

OBJECTIVE: To observe the effect of chronic lead contaminant on protein expression of protein kinase (PKC) and calmodulin (CaM) in hippocampus of baby-rats. METHODS: The Wistar pregnant rats were randomly divided into 3 groups fed with distilled water and lead-contained water (0.2% and 1.0% lead acetate) respectively. The lead exposure period ranged from the 0 day of pregnancy to the offspring weaned. Then the baby-rats were fed with lead water the same as their mothers. Pups were killed at postnatal day 8 and 50 respectively. Atomic absorption spectrometry was used to determine lead content of rats' brain. Western-blotting was used to observe protein expression of PKC and CaM in hippocampus of baby-rats. RESULTS: The brain lead content of test groups was much higher than that of the control group in the same growth period (P < 0.01). The content of brain lead in rats of postnatal day 50 was significantly higher than that of rats of postnatal day 8 (P < 0.01). Compared with control group, PKC and CaM protein expressions of chronic lead exposure baby-rats in the hippocampus were down trend (P < 0.05). CONCLUSION: The decrease of PKC and CaM protein expression level in hippocampus might be one of the molecular mechanisms of lead induced impairment of learning and memory.


Assuntos
Calmodulina/metabolismo , Hipocampo/efeitos dos fármacos , Hipocampo/metabolismo , Chumbo/toxicidade , Proteína Quinase C/metabolismo , Animais , Feminino , Masculino , Gravidez , Efeitos Tardios da Exposição Pré-Natal , Ratos , Ratos Wistar
14.
Magnes Res ; 31(4): 117-130, 2018 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-31099334

RESUMO

To explore the effect of magnesium gluconate (MgG) on lipid metabolism and its regulation mechanism through animal experiments, and to provide basis for MgG dietary intervention in hyperlipidemia. The first four weeks was hyperlipidemia-inducing period through high-fat diet and the following eight weeks was the MgG supplementation. At the end of the experiment, blood and liver samples were collected for the measurements of lipid profile, antioxidative indexes, pathological examination, and cholesterol metabolism-related gene expression. Oral administration of MgG notably decreased the blood levels of TC, TG, LDL-C and liver function index ALT and AST of hyperlipidemic rats. The rats supplemented with magnesium showed a huge increase in the GSH-Px and SOD activities, and reduced the heart weight and liver lipid accumulation of high-fat diet fed rats. MgG remarkably up-regulated the mRNA expression levels of LDLR and CYP7A1 of liver enzymes related to cholesterol metabolism. Oral magnesium supplementation inhibited an increase in lipid profile and liver function index by a high-fat diet, and enhanced the activity of the antioxidant enzymes. Magnesium has lipid-lowering and antioxidative effects that protect the liver against hyperlipidemia.


Assuntos
Antioxidantes/metabolismo , Dieta Hiperlipídica , Regulação da Expressão Gênica/efeitos dos fármacos , Gluconatos/farmacologia , Metabolismo dos Lipídeos/efeitos dos fármacos , Metabolismo dos Lipídeos/genética , Magnésio/farmacologia , Administração Oral , Animais , Colesterol 7-alfa-Hidroxilase/genética , Colesterol 7-alfa-Hidroxilase/metabolismo , Dieta Hiperlipídica/efeitos adversos , Gluconatos/administração & dosagem , Hiperlipidemias/sangue , Hiperlipidemias/induzido quimicamente , Hiperlipidemias/tratamento farmacológico , Hiperlipidemias/genética , Magnésio/administração & dosagem , Masculino , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Ratos , Ratos Sprague-Dawley , Receptores de LDL/genética , Receptores de LDL/metabolismo
15.
Zhonghua Yu Fang Yi Xue Za Zhi ; 41(6): 471-4, 2007 Nov.
Artigo em Zh | MEDLINE | ID: mdl-18399127

RESUMO

OBJECTIVE: To study the inhibitory effects of c9, t11-conjugated linoleic acid (c9, t11-CLA) on migration of human gastric carcinoma cell line (SGC-7901) via cyclooxygenase-2 (COX-2) pathway. METHODS: After inhibiting COX-2 activity by 100 micromol/L COX-2 inhibitor NS-398 in SGC-7901 cell, we treated SGC-7901 cells with c9, t11-CLA at a concentration of 200,100, 50, 25 micromol/L for 24 h, respectively. Using reconstituted basement membrane invasion, adhesion, chemotaxis assays, we detected the effect of c9, t11-CLA and COX-2 on the cell migration. RESULTS: Compared to NS-398 group, 200, 100 micromol/L c9, t11-CLA significantly suppressed SGC-7901 cells invading into the reconstituted basement membrane (F = 14.309, P = 0.000; F = 19.005, P = 0.000). 200 micromol/L c9, t11-CLA significantly inhibited SGC-7901 cells adhering to laminin, fibronectin and Matrigel (F = 3.063, P = 0.021; F = 6.692, P = 0.001; F = 11.999, P = 0.000). The chemotaxis of SGC-7901 cells and inhibitory frequency were significantly decreased in the 200 micromol/L c9, t11-CLA group (F = 1.380, P = 0.276). CONCLUSION: c9, t11-CLA inhibits invasion, adhesion and chemotaxis of SGC-7901 cells, and the COX-2 plays an important role in the process. [ Key words]


Assuntos
Movimento Celular/efeitos dos fármacos , Inibidores de Ciclo-Oxigenase 2/farmacologia , Ácido Linoleico/farmacologia , Neoplasias Gástricas/patologia , Movimento Celular/fisiologia , Ciclo-Oxigenase 2/metabolismo , Humanos , Ácido Linoleico/metabolismo , Invasividade Neoplásica , Neoplasias Gástricas/metabolismo , Células Tumorais Cultivadas
16.
Zhonghua Nan Ke Xue ; 13(8): 675-80, 2007 Aug.
Artigo em Zh | MEDLINE | ID: mdl-17918702

RESUMO

OBJECTIVE: To systematically explore the occurrence of a novel type of chromosome translocation in human sperm samples. METHODS: Specific translocation junction fragments were quantified using nested and/or multi-nested PCR in sperm DNA derived from 28 oligospermic patients and 32 normal controls. RESULTS: t(11;22) was detected in 49 samples. At least 4 samples were found to have t(1;22) (p21.2;q11.2), t(17;22) (q11;q11) or t(X;22) (q27;q11). The mutation rate seemed to be associated not with age or semen volume, but with sperm concentration (r = -0.389, P < 0.05) and motility (r = -0.397, P < 0.05). Correlation was not found between homology of palindromic sequences and mutation rate. CONCLUSION: Palindromic sequence mediated chromosome translocation is common in human sperm, and associated with sperm concentration and motility. Measurement of such mutations may provide a molecular-level reference for assessing sperm quality.


Assuntos
Oligospermia/genética , Espermatozoides/metabolismo , Translocação Genética , Sequência Rica em At , Adulto , Sequência de Bases , Cromossomos Humanos Par 11 , Cromossomos Humanos Par 17 , Cromossomos Humanos Par 22 , Cromossomos Humanos X , Humanos , Masculino , Pessoa de Meia-Idade , Mutação
17.
Gene ; 626: 426-432, 2017 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-28583401

RESUMO

MicroRNAs (miRNAs) are a class of endogenous, non-coding small RNAs that regulate the expression of target genes. Previous studies have suggested that miRNAs are key regulators in cardiovascular systems. This study investigated the role of miR-873 in H9C2 cardiomyocytes by targeting glioma-associated oncogene 1 (GLI1). miR-873 was significantly up-regulated in serum samples from congenital heart disease (CHD) patients compared with those from normal individuals. Furthermore, miR-873 over-expression suppressed H9C2 proliferation and induced cell cycle arrest. Bioinformatic algorithms revealed a predicted target site for miR-873 in the 3'-untranslated region (3'UTR) of GLI1, which was verified using a dual-luciferase reporter assay. qPCR and western blot analysis also showed that miR-873 negatively regulated GLI1 mRNA and protein expression in H9C2 cells. Conversely, GLI1 over-expression partially reversed the growth-inhibitory effect of miR-873. To summarize, our data suggest that miR-873 is a novel miRNA that regulates H9C2 cell proliferation via targeting GLI1, and miR-873 may serve as a new potential biomarker diagnosis in CHD in the future.


Assuntos
Proliferação de Células , Cardiopatias Congênitas/genética , MicroRNAs/genética , Miócitos Cardíacos/metabolismo , Proteína GLI1 em Dedos de Zinco/genética , Regiões 3' não Traduzidas , Animais , Estudos de Casos e Controles , Pontos de Checagem do Ciclo Celular , Linhagem Celular , Cardiopatias Congênitas/sangue , Humanos , Miócitos Cardíacos/fisiologia , Ratos , Soro/metabolismo , Proteína GLI1 em Dedos de Zinco/metabolismo
18.
Zhonghua Yu Fang Yi Xue Za Zhi ; 39(3): 195-8, 2005 May.
Artigo em Zh | MEDLINE | ID: mdl-15938855

RESUMO

OBJECTIVES: To study the effects of c9,t11-conjugated linoleic acid (c9,t11-CLA) on critical enzymes of linoleic acid metabolism in stomach granular cell (SGC-7901). METHODS: SGC-7901 was treated with c9,t11-CLA by 200, 100, 50 or 25 micromol/L for 24 hours. The effects of c9,t11-CLA on the cell proliferation was measured by monotetrazolium and the expression of Delta6-desaturase, Delta5-desaturase, COX-1, COX-2, 5-LOX mRNA were measured by reverse transcription polymerase chain reaction (RT-PCR). RESULTS: At a concentration of 200, 100, 50, or 25 micromol/L, c9,t11-CLA suppressed the proliferation of SGC-7901 by 54.3%, 20.5%, 10.5% and 2.93%. The c9,t11-CLA might decrease the expression of COX-2 mRNA, and increase the expression of Delta6-desaturase and COX-1 in SGC-7901, but might not affect Delta5-desaturase and 5-LOX. CONCLUSION: The effects of c9,t11-CLA on the COX and Delta6-desaturase might play an important role in mediating the ability of c9,t11-CLA as to inhibiting the proliferation of tumor cells, and the anti-cancer activity by c9,t11-CLA might be associated with the linoleic acid metabolism.


Assuntos
Enzimas/genética , Perfilação da Expressão Gênica , Ácidos Linoleicos Conjugados/farmacologia , Ácidos Linoleicos/metabolismo , Linhagem Celular Tumoral , Ciclo-Oxigenase 1/genética , Ciclo-Oxigenase 1/metabolismo , Ciclo-Oxigenase 2/genética , Ciclo-Oxigenase 2/metabolismo , Enzimas/metabolismo , Regulação Enzimológica da Expressão Gênica/efeitos dos fármacos , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Humanos , Metabolismo dos Lipídeos/efeitos dos fármacos , Lipoxigenase/genética , Lipoxigenase/metabolismo , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa
19.
Wei Sheng Yan Jiu ; 34(3): 333-5, 2005 May.
Artigo em Zh | MEDLINE | ID: mdl-16111045

RESUMO

OBJECTIVE: To study the effects of c9, t11-conjugated linoleic acid (c9, t11-CLA) on the critical enzyme (COX-2) and its product - prostaglandin E2 (PGE2) of linoleic acid metabolism path in human gastric adenocarcinoma cell line (SGC-7901). METHODS: Expression of COX-2 mRNA and protein were measured by reverse transcription polymerase chain reaction (RT-PCR) and Western blot, PGE2 was determined by radioimmunoassay (RIA). RESULTS: At the concentrations of 25, 50, 100, 200 pmol/L, c9, t11-CLA suppressed the expression of COX-2 mRNA, protein and PGE. CONCLUSION: COX-2 is involved anti-cancer action of c9, t11-CLA and is likely to act as an important target.


Assuntos
Inibidores de Ciclo-Oxigenase 2/farmacologia , Ciclo-Oxigenase 2/metabolismo , Ácidos Linoleicos Conjugados/farmacologia , Neoplasias Gástricas/patologia , Adenocarcinoma/enzimologia , Adenocarcinoma/patologia , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Ciclo-Oxigenase 2/genética , Dinoprostona/metabolismo , Humanos , Ácido Linoleico/farmacologia , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Neoplasias Gástricas/enzimologia
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