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1.
Am J Chin Med ; 51(6): 1459-1475, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37518097

RESUMEN

Atherosclerotic cardiovascular diseases, commonly known as the formation of fibrofatty lesions in the artery wall, are the leading causes of death globally. Oxidized low-density lipoprotein (oxLDL) is one of the major components of atherosclerotic plaques. It is evident that dietary supplementation containing sources of antioxidants can prevent atherogenic diseases. Schisanhenol (SAL), a dibenzocyclooctene lignin, has been shown to attenuate oxLDL-induced apoptosis and the generation of reactive oxygen species (ROS) in endothelial cells. However, the underlying molecular mechanisms are still largely unknown. In this study, human umbilical vein endothelial cells (HUVECs) were pre-treated with SAL and oxLDL. Our results showed that adenosine monophosphate-activated protein kinase (AMPK) phosphorylation was enhanced in cells pre-treated with SAL in time-dependent and dose-dependent manners. Subsequently, oxLDL-induced AMPK dephosphorylation and protein kinase C (PKC) phosphorylation were significantly reversed in the presence of SAL. In addition, SAL treatment led to an inhibiting effect on the oxLDL-induced membrane assembly of NADPH oxidase subunits, and a similar effect was observed in ROS generation. This effect was further confirmed using knockdown AMPK with small interfering RNA (siRNA) and pharmaceutical reagents, such as the AMPK activator (AICAR), PKC inhibitor (Gö 6983), and ROS inhibitor (DPI). Furthermore, the oxLDL-induced intracellular calcium rise and the potential collapse of the mitochondrial membrane reduced the Bcl-2/Bax ratio, and released cytochrome c from the mitochondria, leading to the subsequent activation of caspase-3 in HUVECs, which were also markedly suppressed by SAL pretreatment. The results mentioned above may provide additional insights into the possible molecular mechanisms underlying the cardiovascular protective effects of SAL.


Asunto(s)
Proteínas Quinasas Activadas por AMP , Estrés Oxidativo , Humanos , Especies Reactivas de Oxígeno/metabolismo , Proteínas Quinasas Activadas por AMP/metabolismo , Células Endoteliales de la Vena Umbilical Humana/metabolismo , Lipoproteínas LDL , Apoptosis , Células Cultivadas
2.
Environ Toxicol ; 38(7): 1589-1596, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-36999521

RESUMEN

Atherosclerotic lesions play a critical role in leading cardiovascular diseases. Oxidized low-density lipoprotein (OxLDL) is a vital risk factor for atherosclerosis since it acts a crucial role in endothelial dysfunction and foam cell formation. Schisanhenol, a composition extracted from the fruit of Schisandra rubriflora, has been reported to have antioxidative effects on human LDL oxidation. This study investigates whether Schisanhenol protects against oxLDL-mediated endothelial damage by modulating the lectin-like oxLDL receptor-1 (LOX-1)-mediated inflammatory processes. Human umbilical vein endothelial cells (HUVECs) were pre-treated with 10 or 20 µM Schisanhenol for 2 h and then exposed to 150 µg/mL oxLDL. We revealed that Schisanhenol reduced oxLDL-enhanced LOX-1 expression. We also found that oxLDL down-regulated endothelial nitric oxide synthase (eNOS) as well as activated inducible NOS (iNOS), thereby enhancing the generation of nitric oxide (NO). Moreover, oxLDL elevated the expression levels of phosphorylated-p38MAPK, subsequently promoting NF-κB-modulated inflammatory responses. Pretreatment with Schisanhenol exerted significant cytoprotective function in all the above-mentioned detrimental events. Results from this present study reveal that Schisanhenol has a potential therapeutic effect on preventing oxLDL-induced endothelial injuries.


Asunto(s)
Aterosclerosis , Receptores Depuradores de Clase E , Humanos , Especies Reactivas de Oxígeno/metabolismo , Lipoproteínas LDL/farmacología , Células Endoteliales de la Vena Umbilical Humana , Aterosclerosis/inducido químicamente , Óxido Nítrico Sintasa de Tipo III/metabolismo , Células Cultivadas
3.
Taiwan J Obstet Gynecol ; 60(1): 177-180, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33494998

RESUMEN

OBJECTIVE: Twin-Reversed Arterial Perfusion (TRAP) sequence is a rare complication of monochorionic multiple gestation. Conservative management should be considered if there is no poor prognostic factor. CASE REPORT: This is a 35 year-old female with twin pregnancy with acardiac monster. Under the request of the patient, there was no intervention during the whole pregnancy. We keep regular and close sonography weekly follow up. There was no maternal complication and there was also no heart failure sign or polyhydramnios of the donor twin. Minimal blood flow was noted at the anastomotic vessels under the sonography at late gestational age. Due to breech presentation, cesarean section was performed at gestational age 37 + 1/7 weeks. She delivers a healthy baby smoothly. CONCLUSION: Antenatal sonography is an important tool to evaluate the fetus status. Under special condition, term pregnancy is still possible without any treatment. CASE REPORT: Twin reversed arterial perfusion syndrome in a monochorionic monoamniotic twin pregnancy.


Asunto(s)
Anomalías Teratoides Graves/diagnóstico por imagen , Transfusión Feto-Fetal/diagnóstico por imagen , Embarazo Gemelar , Anomalías Teratoides Graves/embriología , Adulto , Presentación de Nalgas/cirugía , Cesárea , Femenino , Transfusión Feto-Fetal/embriología , Humanos , Recién Nacido , Nacimiento Vivo , Embarazo , Síndrome , Gemelos Monocigóticos , Ultrasonografía Prenatal , Espera Vigilante
4.
J Formos Med Assoc ; 118(11): 1551-1559, 2019 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30928189

RESUMEN

BACKGROUND: Major depressive episodes (MDEs) are common during pregnancy and postpartum periods, and the consequences can be severe to mother and offspring. Few studies have investigated the clinical factors associated with the onset and remission of perinatal depression in different time points. METHODS: A cohort of 234 pregnant women was recruited and assessed with structured Mini-International Neuropsychiatric Interview (MINI) for diagnoses of MDEs. The severity of mood status was measured with Taiwanese version of the Edinburgh Postnatal Depression Scale (EPDS-T) and the second edition of Beck Depression Inventory (BDI-II) at 16 weeks' gestation, 28 weeks' gestation and 4 weeks postpartum. Statistical analysis was conducted by independent t-tests, chi-squared, and Fisher's exact tests. RESULTS: Thirty-one pregnant women (13.2%) developed MDEs; 11 (4.7%) at the 16th week, 8 (3.4%) at the 28th week of gestation, and 12 (5.1%) at the 4th week of postpartum. Among the 19 women with prenatal MDEs, 9 (47%) experienced remission by the end of pregnancy, and 10 sustained, resulting in the cumulative prevalence of 9.4% (22 out of 234) for postpartum MDEs. Women with lower levels of education, family history of psychiatric disorders, lack of postpartum recuperation, and family-bond stress were more likely to experience MDEs. More preterm birth and lower birth weights were reported in postpartum-onset than pregnancy-onset MDEs. Psychiatric interventions were associated with a higher percentage of remission of MDE during the perinatal period. CONCLUSION: The findings of this study provide clinical implications for early detection and intervention of MDEs throughout the pregnancy.


Asunto(s)
Depresión Posparto/epidemiología , Trastorno Depresivo Mayor/epidemiología , Periodo Posparto/psicología , Complicaciones del Embarazo/epidemiología , Mujeres Embarazadas/psicología , Adulto , Depresión Posparto/psicología , Trastorno Depresivo Mayor/psicología , Femenino , Humanos , Estudios Longitudinales , Embarazo , Complicaciones del Embarazo/psicología , Prevalencia , Estudios Prospectivos , Escalas de Valoración Psiquiátrica , Taiwán , Adulto Joven
5.
BMC Public Health ; 18(1): 438, 2018 04 02.
Artículo en Inglés | MEDLINE | ID: mdl-29609583

RESUMEN

BACKGROUND: We examined the risk for Group B streptococcus (GBS)-related diseases in newborns born to mothers who participated in a universal GBS screening program and to determine whether differences are observed in factors affecting the morbidity for neonatal early-onset GBS-related diseases. METHODS: This is a retrospective study and the study subjects were women who had undergone GBS screening and who gave birth naturally and their newborns between April 15, 2012 and December 31, 2013. Data from the GBS screening system database and the National Health Insurance database were collected to calculate the GBS prevalence in pregnant women and morbidity of newborns with early-onset GBS-related diseases. RESULTS: The GBS prevalence in pregnant women who gave birth naturally was 19.58%. The rate of early-onset infection caused by GBS in newborns decreased from the original 0.1% to 0.02%, a decrease of as high as 80%. After the implementation of the universal GBS screening program, only three factors, including positive GBS screening result (OR = 2.84), CCI (OR = 2.45), and preterm birth (OR = 4.81) affected the morbidity for neonatal early-onset GBS-related diseases, whereas other factors had no significant impact. CONCLUSION: The implementation of the universal GBS screening program decreased the infection rate of neonatal early-onset GBS diseases. The effects of socioeconomic factors and high-risk pregnancy on early-onset GBS infections were weakened.


Asunto(s)
Programas Nacionales de Salud/organización & administración , Tamizaje Neonatal/organización & administración , Infecciones Estreptocócicas/epidemiología , Streptococcus agalactiae , Bases de Datos Factuales , Femenino , Humanos , Recién Nacido , Transmisión Vertical de Enfermedad Infecciosa/prevención & control , Embarazo , Complicaciones Infecciosas del Embarazo/epidemiología , Estudios Retrospectivos , Factores de Riesgo , Infecciones Estreptocócicas/transmisión , Taiwán/epidemiología
6.
Prog Neuropsychopharmacol Biol Psychiatry ; 80(Pt C): 273-278, 2018 Jan 03.
Artículo en Inglés | MEDLINE | ID: mdl-28536068

RESUMEN

INTRODUCTION: Prenatal depression (PND) is a common psychiatric disorder in pregnant women and leads to psychosocial dysfunction, high suicidal rate, and adverse childcare. Patients with PND have omega-3 polyunsaturated fatty acid (omega-3 or n-3 PUFAs) deficits, which might link to chronic low-grade inflammatory process and the pathophysiological mechanisms of depression. In this case-control study, we examined the levels of PUFAs and inflammatory cytokines in PND. METHOD: Blood samples were obtained and analyzed from 16 healthy controls and 17 depressed cases (PND group) diagnosed with Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). Independent sample t-test and correlation analysis were performed with Statistical Package for the Social Sciences (SPSS) logistics correlation analysis. RESULTS: PND group had significantly lower levels of total n-3 (p=0.026), docosahexaenoic acid (DHA) (p=0.020) and eicosapentaenoic (EPA) (p=0.019) but a higher omega-6 (n-6)/n-3 PUFAs ratio (p=0.007) and tumor necrosis factor alpha (TNF-α) (p=0.016) level. Moreover, the duration of current PND episodes were also significantly correlated with DHA, EPA, n-3 PUFAs, n-6/n-3 ratio and TNF-α. In terms of PUFAs and cytokine levels, only DHA was inversely correlated with TNF-α. CONCLUSION: PND is significantly associated with lower DHA, EPA, and total n-3 PUFAs levels and an increased n-6/n-3 PUFAs ratio, while the duration of PND is associated with lower levels of n-3 PUFAs, including DHA and EPA. The correlation of PUFAs levels with depression and TNF-α level grant further investigation into the inflammatory process underlying PND, mediated by PUFAs.


Asunto(s)
Trastorno Depresivo Mayor/sangre , Ácidos Grasos Omega-3/sangre , Mediadores de Inflamación/sangre , Complicaciones del Embarazo/sangre , Adolescente , Adulto , Biomarcadores/sangre , Estudios de Casos y Controles , Femenino , Humanos , Persona de Mediana Edad , Embarazo , Adulto Joven
9.
Taiwan J Obstet Gynecol ; 55(4): 515-8, 2016 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-27590374

RESUMEN

OBJECTIVE: This study is to examine the effect of Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14 taken orally before bedtime on Group B Streptococcus (GBS)-positive pregnant women with respect to becoming GBS negative. MATERIALS AND METHODS: In total, 110 pregnant women at 35-37 weeks of gestation who were diagnosed by GBS culture as being GBS positive for both vaginal and rectal GBS colonization were randomly assigned to be orally treated with two placebo capsules or two probiotic capsules (containing L. rhamnosus GR-1 and L. reuteri RC-14) before bedtime until delivery. All women were tested for vaginal and rectal GBS colonization again by GBS culture on admission for delivery. RESULTS: Of the 110 participants, 99 completed the study (49 in the probiotic group and 50 in the placebo group). The GBS colonization results changed from positive to negative in 21 women in the probiotic group (42.9%) and in nine women in the placebo group (18.0%) during this period (Chi-square p=0.007). CONCLUSION: Oral probiotic containing L. rhamnosus GR-1 and L. reuteri RC-14 could reduce the vaginal and rectal GBS colonization rate in pregnant women.


Asunto(s)
Lacticaseibacillus rhamnosus , Limosilactobacillus reuteri , Tercer Trimestre del Embarazo , Probióticos/uso terapéutico , Streptococcus agalactiae/crecimiento & desarrollo , Adulto , Método Doble Ciego , Femenino , Humanos , Transmisión Vertical de Enfermedad Infecciosa/prevención & control , Embarazo , Estudios Prospectivos , Recto/microbiología , Infecciones Estreptocócicas/microbiología , Infecciones Estreptocócicas/prevención & control , Infecciones Estreptocócicas/transmisión , Vagina/microbiología
10.
Nutr Cancer ; 65(3): 505-14, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23530650

RESUMEN

Diallyl sulfide (DAS) is a component of garlic (Alliaceae family). Although diallyl polysulfide has been shown to exhibit anticancer activities, no report explored DAS-affected cell death in human cervical cancer cells in vitro. This study investigated DAS affected on cell-cycle regulation and apoptosis in human cervical cancer Ca Ski cells. DAS at 25-100 µM decreased the viability of Ca Ski cells by increasing G0/G1 phase arrest followed by induction of apoptosis in concentration- and time-dependent effects. Flow cytomteric assay indicated that DAS (75 µM) promoted the production of Ca(2+) accumulation and decreased the level of mitochondrial membrane potential in Ca Ski cells. Western blotting showed that 75 µM of DAS-induced G0/G1 phase arrest was mediated through the increased expression of p21, p27, and p53 with a simultaneous decrease in CDK2, CDK6, and CHK2 expression. The characteristics of apoptosis, such as morphological changes and DNA condensation, altered the ratio of Bax/Bcl-2 and sub-G1 phase occurred in Ca Ski cells after exposure to DAS. Furthermore, DAS induced mitochondrial dysfunction, leading to the release of cytochrome c for causing apoptosis in Ca Ski cells. These findings suggest that DAS might be a potential chemotherapeutic agent for the treatment of cervical cancer.


Asunto(s)
Compuestos Alílicos/farmacología , Apoptosis/efectos de los fármacos , Puntos de Control del Ciclo Celular/efectos de los fármacos , Transducción de Señal/fisiología , Sulfuros/farmacología , Proteína p53 Supresora de Tumor/genética , Neoplasias del Cuello Uterino/patología , Caspasas/fisiología , Línea Celular Tumoral , Daño del ADN/efectos de los fármacos , Femenino , Puntos de Control de la Fase G1 del Ciclo Celular/efectos de los fármacos , Expresión Génica/efectos de los fármacos , Humanos , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Mitocondrias/fisiología , Especies Reactivas de Oxígeno/metabolismo , Neoplasias del Cuello Uterino/metabolismo
11.
Am J Obstet Gynecol ; 208(4): 318.e1-7, 2013 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-23313310

RESUMEN

OBJECTIVE: Amniotic fluid embolism syndrome is a fatal disease in pregnant women. The exact role of platelets and neutrophils in amniotic fluid embolism syndrome is not clear. We examined whether amniotic fluid could affect platelet-neutrophil aggregation and activation and the possible mechanisms. STUDY DESIGN: Blood samples from the pregnant women were pretreated ex vivo with their own amniotic fluid. Flow cytometry was used to measure platelet-neutrophil aggregation and activation. Neutrophil-mediated activity of p38 mitogen-activated protein kinase and extracellular signal-regulated protein kinases 1 and 2 was analyzed by Western blotting. RESULTS: Amniotic fluid significantly induced platelet-neutrophil aggregation, neutrophil CD11b expression, and reactive oxygen species production. Amniotic fluid induced minimal platelet P-selectin expression. The increase of intracellular calcium level of neutrophils and the activity of p38 mitogen-activated protein kinase were enhanced by amniotic fluid stimulation. CONCLUSION: Amniotic fluid was able to induce neutrophil activation and platelet-neutrophil aggregation with minimal effect on platelet activation. These findings may provide a new insight in the understanding of the pathophysiologic condition of amniotic fluid embolism syndrome.


Asunto(s)
Líquido Amniótico/inmunología , Embolia de Líquido Amniótico/inmunología , Activación Neutrófila/inmunología , Agregación Plaquetaria/inmunología , Femenino , Humanos , Embarazo
12.
Vaccine ; 30(16): 2671-5, 2012 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-22342546

RESUMEN

BACKGROUND: This study evaluated the incidence, nature, and seriousness of adverse drug reactions (ADRs) occurring after AdimFlu-S(®) influenza A (H1N1) vaccination in pregnant women was administered. METHODS: This is a retrospective cohort study. Between October 2009 and February 2010, 198 pregnant women who had received the AdimFlu-S(®) influenza A (H1N1) vaccine during pregnancy and 198 age-matched pregnant women who had not received influenza vaccine were included and recorded. The pregnancy outcome and maternal adverse effects were extracted from chart reviews. Infant health status data were followed up until 8 weeks post-partum. RESULTS: During the observation period of each cohort, four subjects (2.0%) in the exposed group experienced vaccine-related adverse events that were mild in severity. A total of 17 women (8.6%) in the vaccine exposed group and 40 women (20.2%) in the unexposed group underwent at least one adverse effect during their pregnancy. A total of 72 infants (35.6%) in the exposed group and 101 infants (49%) in the unexposed group had at least one adverse event within 8 weeks after they were born (p<0.05). The adverse events experienced by the women and their infants were not increased when the vaccine was administered during the first trimester. There were no significant differences between these two groups with regard to preterm delivery rate and stillbirth rate. CONCLUSION: AdimFlu-S (®) influenza A (H1N1) vaccine is safe for pregnant women and their infants.


Asunto(s)
Enfermedades del Prematuro/prevención & control , Vacunas contra la Influenza/inmunología , Gripe Humana/prevención & control , Complicaciones Infecciosas del Embarazo/prevención & control , Vacunación , Adulto , Estudios de Casos y Controles , Femenino , Humanos , Lactante , Recién Nacido , Recien Nacido Prematuro , Enfermedades del Prematuro/inmunología , Enfermedades del Prematuro/virología , Subtipo H1N1 del Virus de la Influenza A/inmunología , Gripe Humana/inmunología , Gripe Humana/virología , Farmacovigilancia , Embarazo , Complicaciones Infecciosas del Embarazo/inmunología , Complicaciones Infecciosas del Embarazo/virología , Estudios Retrospectivos , Taiwán
13.
J Nutr Biochem ; 23(5): 458-68, 2012 May.
Artículo en Inglés | MEDLINE | ID: mdl-21684136

RESUMEN

BACKGROUND: Atherosclerosis is a chronic inflammatory disease of the vessel wall associated with oxidized low-density lipoprotein (oxLDL)-induced apoptosis of endothelial cells. Coenzyme Q10 (CoQ10), a potent antioxidant and a critical intermediate of the electron transport chain, has been reported to inhibit LDL oxidation and thus the progression of atherosclerosis. However, its molecular mechanisms on endothelial cells remain still unclarified. METHODS: In this study, primary human umbilical vein endothelial cell cultures treated with oxLDL were used to explore the protective effects of CoQ10. RESULTS: Our results showed that CoQ10 attenuated the oxLDL-induced generation of reactive oxygen species and improved the antioxidant capacity. CoQ10 also attenuated the oxLDL-mediated down-regulation of endothelial nitric oxide synthase (eNOS) and up-regulation of inducible nitric oxide synthase (iNOS). In addition, CoQ10 suppressed oxLDL-activated NF-κB and downstream inflammatory mediators, including expression of adhesion molecules, release of proinflammatory cytokines and the adherence of monocytic THP-1 cells. Moreover, CoQ10 attenuated oxLDL-altered proapoptotic responses. The inhibitor of eNOS (L-NIO 10 µM) and iNOS (1400W 10 µM) as well as NO enhancer (SNP 10 µM) were used to clean up the mechanism. CONCLUSION: These results provide new insight into the possible molecular mechanisms by which CoQ10 protects against atherogenesis by NO-related pathways.


Asunto(s)
Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Óxido Nítrico/metabolismo , Estrés Oxidativo , Transducción de Señal , Ubiquinona/análogos & derivados , Vitaminas/farmacología , Apoptosis , Daño del ADN , Células Endoteliales de la Vena Umbilical Humana/metabolismo , Humanos , Lipoproteínas LDL/metabolismo , FN-kappa B/metabolismo , Óxido Nítrico Sintasa de Tipo II/metabolismo , Óxido Nítrico Sintasa de Tipo III/metabolismo , Ubiquinona/farmacología , Regulación hacia Arriba
14.
Mol Med Rep ; 5(3): 859-65, 2012 03.
Artículo en Inglés | MEDLINE | ID: mdl-22200785

RESUMEN

Epidemic prevention policies in hospitals address issues such as, indoor air quality control, cleanliness of medical staff clothing and employee hand-washing procedures. Our hospital employed Bio-Kil to treat air-conditioning filters and nursing staff uniforms. We also assessed the efficacy of different detergents. Using Bio-Kil technology, the mean bacterial count in the air was reduced from 108.8 CFU/h/plate (n=420) to 68.6 CFU/h/plate (n=630). On the lower hems of the Bio-Kil-treated gowns, the mean bacterial count was 1,201 CFU/100 cm(2), markedly lower than the bacterial count of 7,753 CFU/100 cm(2), found on the parts of the gowns not treated with Bio-Kil (p=0.0401). On the cuffs of sleeves treated with Bio-Kil, the mean count was 1,165 CFU/100 cm(2), markedly lower than that of 2,131 CFU/100 cm(2), found on the cuffs not treated with Bio-Kil (p=0.0073). With regard to the mean bacterial eradication rates of antimicrobial solutions, Steridal Solution, 75% alcohol and Bio-Kil (3rd generation) were shown to be the most effective, with rates exceeding 80%. Hibiscrub with paper towels and Fresh Protect Skin were the second most effective. Bio-Kil (1st generation), tap water with paper towels, liquid hand soap with paper towels and ozone water were the least effective. One important observation was that hand-washing without the use of paper towels increased the bacterial count by as much as 84% . Bio-Kil is effective in reducing bacterial counts in the air, on nursing staff uniforms and is an effective detergent.


Asunto(s)
Microbiología del Aire , Antiinfecciosos Locales/farmacología , Epidemias/prevención & control , Hospitales , Ropa de Protección/microbiología , Bacterias/efectos de los fármacos , Recuento de Colonia Microbiana , Estudios de Factibilidad , Mano/microbiología , Desinfección de las Manos , Humanos
15.
Cell Biochem Biophys ; 62(3): 467-79, 2012 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-22194154

RESUMEN

Vinorelbine tartrate (VNR), a semi-synthetic vinca alkaloid acquired from vinblastine, has extensively been used as an anticancer agent. However, VNR-induced oxidative damage may cause several side effects, such as venous irritation, vascular pain, and necrotizing vasculitis, thereby repressing clinical treatment efficiency. The molecular mechanisms underlying the induced oxidative stress in endothelial cells are still largely unknown. This study was designed to test the hypothesis that VNR induces oxidative injury through modulation of AMP-activated protein kinase (AMPK) and possible mechanisms were then explored. Human umbilical vein endothelial cells (HUVECs) were treated with VNR (5-0.625 µM) to produce oxidative damage. The VNR-mediated AMPK, PKC, and NADPH oxidase expressions were investigated by western blotting. Furthermore, several oxidative stress-induced oxidative damage markers as well as pro-inflammatory responses were also investigated. VNR treatment resulted in dephosphorylation of AMPK, which in turn led to an activation of NADPH oxidase by PKC; however, the phenomena were repressed by AICAR (an agonist of AMPK). Furthermore, VNR suppressed Akt/eNOS and enhanced p38 mitogen-activated protein kinase (MAPK), which in turn activated the NF-κB pathway. Furthermore, VNR facilitated several pro-inflammatory events, such as the adherence of monocytic THP-1 cells to HUVECs, pro-inflammatory cytokines release, and overexpression of adhesion molecular. Our results highlight a possible molecular mechanism for VNR-mediated endothelial dysfunction.


Asunto(s)
Células Endoteliales de la Vena Umbilical Humana/metabolismo , Estrés Oxidativo/efectos de los fármacos , Transducción de Señal/efectos de los fármacos , Vinblastina/análogos & derivados , Quinasas de la Proteína-Quinasa Activada por el AMP , Aminoimidazol Carboxamida/análogos & derivados , Aminoimidazol Carboxamida/farmacología , Antineoplásicos Fitogénicos/farmacología , Células Cultivadas , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Humanos , NADPH Oxidasas/metabolismo , FN-kappa B/metabolismo , Fosforilación , Proteína Quinasa C/metabolismo , Proteínas Quinasas/química , Proteínas Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Especies Reactivas de Oxígeno/metabolismo , Ribonucleótidos/farmacología , Vinblastina/farmacología , Vinorelbina , Proteínas Quinasas p38 Activadas por Mitógenos/metabolismo
16.
Mol Nutr Food Res ; 55 Suppl 2: S227-40, 2011 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-21812107

RESUMEN

SCOPE: The lectin-like oxidized low-density lipoprotein receptor (LOX-1) is one pivot receptor for oxidized low-density lipoprotein (oxLDL) in human endothelial cells. Co-enzyme Q10 (Co Q10) has been widely used in clinical intervention. However, the molecular mechanisms underlying its protective effects against oxidative stress in endothelial cells are still largely unknown. This study was designed to test the hypothesis that Co Q10 mitigates oxLDL-induced endothelial oxidative injuries via modulation of LOX-1-mediated reactive oxygen species (ROS) generation and explored the role of AMP-activated protein kinase (AMPK), a negative regulator of NADPH oxidase. METHODS AND RESULTS: Human umbilical vein endothelial cells (HUVECs) were pretreated with Co Q10 and then incubated with oxLDL for 24 h. Co Q10 attenuated oxLDL-elicited LOX-1 expression and ROS generation by suppression of NADPH oxidase activation. Co Q10 rescued dephosphorylation of AMPK caused by oxLDL that in turn led to an activation of NADPH oxidase by PKC. The results were confirmed using AMPK siRNA. Moreover, oxLDL-suppressed Akt/eNOS and enhanced p38 phosphorylation, which in turn activated NF-κB pathway. These detrimental events were ameliorated by Co Q10. CONCLUSION: These results provide new highlight onto the possible molecular mechanisms of how Q10 suppresses oxLDL-induced endothelial oxidative injuries by the modulation of LOX-1-mediated ROS generation via the AMPK/PKC/NADPH oxidase signaling pathway.


Asunto(s)
Lipoproteínas LDL/metabolismo , NADPH Oxidasas/metabolismo , Especies Reactivas de Oxígeno/metabolismo , Receptores Depuradores de Clase E/metabolismo , Ubiquinona/análogos & derivados , Proteínas Quinasas Activadas por AMP/genética , Proteínas Quinasas Activadas por AMP/metabolismo , Membrana Celular/metabolismo , Activación Enzimática , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Humanos , FN-kappa B/metabolismo , Óxido Nítrico Sintasa de Tipo III/metabolismo , Estrés Oxidativo/efectos de los fármacos , Proteína Quinasa C/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , ARN Interferente Pequeño , Transducción de Señal/efectos de los fármacos , Ubiquinona/farmacología
17.
In Vivo ; 25(3): 393-8, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21576413

RESUMEN

Danthron has been shown to induce apoptotic cell death, and inhibit migration and invasion of human gastric or brain cancer cells in vitro. However, there is no report addressing whether danthron affects murine leukemia cells or immune responses in vivo. Herein, this study focused on the in-vivo effects of danthron on WEHI-3 leukemia in mice and immune responses in vivo. The results indicated that danthron reduced spleen weight and increased the percentage of cells with CD3 and CD19 markers, indicating that differentiation of the precursors of T- and B-cells was promoted in the leukemic mice. The results also showed that danthron promoted the activity of phagocytosis by macrophages isolated from the peritoneal cavity but had no effect on peripheral blood mononuclear cells. Danthron also promoted natural killer cell cytocytic activity at an effector and target cell ratio of 100:1 in comparison with leukemic animals in vivo. Taken together, these results demonstrated that application of danthron might affect WEHI-3 leukemia in mice and modulate immune responses in vivo.


Asunto(s)
Antraquinonas/farmacología , Antineoplásicos/farmacología , Citotoxicidad Inmunológica/efectos de los fármacos , Células Asesinas Naturales/efectos de los fármacos , Leucemia Experimental , Macrófagos/efectos de los fármacos , Fagocitosis/efectos de los fármacos , Animales , Línea Celular Tumoral , Células Asesinas Naturales/inmunología , Leucemia Experimental/patología , Macrófagos/inmunología , Macrófagos/metabolismo , Masculino , Ratones , Ratones Endogámicos BALB C , Fagocitosis/inmunología , Bazo/patología
18.
Transplantation ; 91(12): 1412-6, 2011 Jun 27.
Artículo en Inglés | MEDLINE | ID: mdl-21494176

RESUMEN

BACKGROUND: Severe steroid-resistant acute graft-versus-host disease (aGVHD) is associated with high mortality. Bone marrow-derived mesenchymal stem cells (BMMSC) have been found to be immunosuppressive, and intravenous infusion of BMMSC is an effective therapy for steroid-resistant aGVHD. However, acquiring BMMSC requires an invasive procedure. METHODS: We compared umbilical cord-derived mesenchymal stem cells (UCMSC) and BMMSC for morphology, surface markers expression, differentiation, proliferative potential, and their suppressive effects on peripheral blood mononuclear cell proliferation. After institutional review board approved, we intravenously infused ex vivo expanded third-party UCMSC into two patients with severe steroid-resistant aGVHD. Adverse effects and patient responses of UCMSC were monitored. All procedures for UCMSC processing complied with current good tissue practice requirements. RESULTS: We found that UCMSC had superior proliferative potential and more suppressive effects on peripheral blood mononuclear cell proliferation compared with BMMSC. The aGVHD improved dramatically after each of four infusions of UCMSC into the two patients. No adverse effects were noted. Both patients are doing well now. CONCLUSIONS. Considering that acquiring UCMSC is noninvasive, these cells would appear to be the ideal candidates for clinical cell-based therapies. This is the first report of UCMSC in a human clinical application, and this procedure seems both feasible and safe. These findings suggested that UCMSC were effective for treating aGVHD.


Asunto(s)
Sangre Fetal/citología , Enfermedad Injerto contra Huésped/terapia , Trasplante de Células Madre Mesenquimatosas/métodos , Células Madre Mesenquimatosas/citología , Esteroides/uso terapéutico , Células de la Médula Ósea/citología , Proliferación Celular , Niño , Preescolar , Humanos , Inmunosupresores/uso terapéutico , Masculino , Resultado del Tratamiento
19.
J Agric Food Chem ; 59(9): 5100-8, 2011 May 11.
Artículo en Inglés | MEDLINE | ID: mdl-21480623

RESUMEN

Previous studies have shown that vascular endothelium-derived matrix metalloproteinases (MMPs) contribute to the destabilization of atherosclerotic plaques, a key event triggering acute myocardial infarction. In addition, studies have reported that the PKC-MEK-PPARγ signaling pathway is involved in oxidized low-density lipoprotein (oxLDL)-induced expression of MMPs. Ellagic acid, a phenolic compound found in fruits and nuts, has potent antioxidant, anti-inflammatory, and anticancerous properties. However, the molecular mechanisms underlying its antiatherogenic effects remain to be clarified. This study aimed to assess whether the effects of ellagic acid on the fibrotic markers MMP-1 and MMP-3 are modulated by the PKC-ERK-PPAR-γ signaling pathway in human umbilical vein endothelial cells (HUVECs) that have been exposed to oxLDL. It was found that ellagic acid significantly inhibited oxLDL-induced expressions of MMP-1 and MMP-3. Pretreatment with ellagic acid and DPI, a well-known ROS inhibitor, attenuated the oxLDL-induced expression and activity of PKC-α. In addition, ellagic acid as well as pharmacological inhibitors of ROS, calcium, and PKC strongly suppressed the oxLDL-induced phosphorylation of extracellular signal-regulated kinase (ERK) and NF-κB activation. Moreover, ellagic acid ameliorated the oxLDL-induced suppression of PPAR-γ expression. In conclusion, the data suggest that ellagic acid elicits its protective effects by modulating the PKC-α/ERK/PPAR-γ/NF-κB pathway, resulting in the suppression of ROS generation and, ultimately, inhibition of MMP-1 and MMP-3 expression in HUVECs exposed to oxLDL.


Asunto(s)
Regulación hacia Abajo/efectos de los fármacos , Ácido Elágico/farmacología , Células Endoteliales/efectos de los fármacos , Células Endoteliales/metabolismo , Lipoproteínas LDL/metabolismo , Metaloproteasas/genética , Transducción de Señal/efectos de los fármacos , Células Cultivadas , Células Endoteliales/enzimología , Quinasas MAP Reguladas por Señal Extracelular/genética , Quinasas MAP Reguladas por Señal Extracelular/metabolismo , Humanos , Metaloproteasas/metabolismo , FN-kappa B/genética , FN-kappa B/metabolismo , PPAR gamma/genética , PPAR gamma/metabolismo , Proteína Quinasa C-alfa/genética , Proteína Quinasa C-alfa/metabolismo
20.
Pediatr Hematol Oncol ; 28(2): 150-4, 2011 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-21299342

RESUMEN

The authors report a case of congenital hepatoblastoma that was diagnosed in the antenatal period at 39 weeks' gestation. The infant was delivered vaginally without rupture of the tumor. The neonate then received chemotherapy and underwent surgical excision of the tumor. After 1 year, no tumor recurrence has been noted.


Asunto(s)
Hepatoblastoma/diagnóstico por imagen , Neoplasias Hepáticas/diagnóstico por imagen , Ultrasonografía Prenatal , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Colecistectomía , Terapia Combinada , Femenino , Hepatoblastoma/terapia , Humanos , Recién Nacido , Neoplasias Hepáticas/terapia , Embarazo , Resultado del Tratamiento
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