Search results for "VITRO"
showing 10 items of 2786 documents
Damping excessive inflammation and tissue damage in Mycobacterium tuberculosis infection by Toll IL-1 receptor 8/single Ig IL-1-related receptor, a n…
2007
Abstract Toll IL-1R 8/single Ig IL-1-related receptor (TIR8/SIGIRR) is a member of the IL-1R family, expressed by epithelial tissues and immature dendritic cells, and is regarded as a negative regulator of TLR/IL-1R signaling. Tir8-deficient mice were rapidly killed by intranasal administration of low doses of Mycobacterium tuberculosis, despite controlling efficiently the number of viable bacilli in different organs. Tir8−/−-infected mice showed an increased number of neutrophils and macrophages in the lungs; however, mycobacteria-specific CD4 and CD8 T cells were similar in Tir8−/− and Tir8+/+ mice. Exaggerated mortality of Tir8−/− mice was due to massive liver necrosis and was accompanie…
Synthesis and biological evaluation of 2-(3 ',4 ',5 '-trimethoxybenzoyl)-3-amino 5-aryl thiophenes as a new class of tubulin inhibitors
2006
2-(3',4',5'-Trimethoxybenzoyl)-3-amino-5-aryl/heteroaryl thiophene derivatives were synthesized and evaluated for antiproliferative activity, inhibition of tubulin polymerization, and cell cycle effects. SARs were elucidated with various substitutions on the aryl moiety 5-position of the thienyl ring. Substituents at the para-position of the 5-phenyl group showed antiproliferative activity in the order of F=CH(3) > OCH(3)=Br=NO(2) > CF(3)=I > OEt. Several of these compounds led to arrest of HL-60 cells in the G2/M phase of the cell cycle and induction of apoptosis.
Comparative toxicity and cell-tissue distribution study on nanoparticular iron complexes using avian embryos and HepG2-cells
2007
In this study the toxicity and intracellular availability of iron from iron dextran (FeD), iron sucrose (FeS), and iron gluconate (FeG) was compared in organs of avian (turkey) embryos and in isolated cells (HepG2) in cell culture. Iron uptake was more pronounced in embryonic liver than in renal tissue. Cellular iron uptake in liver and kidney was more or less similar for the different compounds. Only some experiments showed slightly greater iron concentrations in liver and kidney with FeG compared with FeD and FeS. Significant differences were found in the survival ratios of the eggs and the embryo weights depending on the type of iron complex administered. The rank order of toxicities was…
Impact of FIGO type 3 uterine fibroids on in vitro fertilization outcomes: A systematic review and meta‐analysis
2023
Background: The effect of FIGO (the International Federation of Gynecology & Obstetrics) type 3 myomas on in vitro fertilization (IVF) is uncertain. Objectives: To evaluate whether FIGO type 3 myomas affect IVF outcomes, through a systematic review and meta-analysis (CRD42022379700). Search strategy: Electronic databases were searched until November 15, 2022. Selection criteria: Studies evaluating the effects of FIGO type 3 myomas on IVF outcome. Data collection and analysis: Pooled results were expressed as odds ratios (OR) with 95% confidence intervals (CI). Heterogeneity was assessed using Higgins I2 . Sources of heterogeneity were explored with sensitivity and subgroup analyses. Mai…
The experimental herbicide UKJ72J is an inhibitor of succinate oxidation in plant mitochondria
1983
not received UKJ72J Herbicide Thiopyrimidine Plant mitochondria Inhibitor Succinate oxidation
Influencia de la exposición femenina a compuestos ambientales y procedentes de la dieta sobre los resultados del tratamiento de fecundación in vitro
2022
En las últimas décadas se han observado menores tasas de fertilidad, fundamentalmente en regiones industrializadas, lo que ha incrementado la necesidad de recurrir a técnicas de reproducción asistida. Entre los factores responsables de este descenso de la fertilidad humana se han incluido tanto factores socioeconómicos como factores ambientales y de estilo de vida, entre los que se incluye la exposición a factores ambientales y procedentes de la dieta. Aunque su influencia ha sido bastante estudiada en hombres, su impacto sobre la fertilidad femenina se encuentra mucho menos evaluada. Por lo tanto, el objetivo de la presente tesis ha sido evaluar las concentraciones de fitoestrógenos (daidz…
Tasa acumulada de recién nacido vivo en donación de ovocitos
2016
Tasa Acumulada de Recién nacido Vivo en Donación de Ovocitos Hoy en día la edad media de maternidad esta aumentando en muchos países desarrollados, cada vez más, las mujeres están posponiendo su deseo por quedarse embarazadas, viéndose así mermada su capacidad reproductiva. La utilización de donantes de ovocitos en fecundación in Vitro (FIV), es una opción de tratamiento en infertilidad, muy utilizado por mujeres con pérdida irreversible de la función ovárica o fallo ovárico primario. La donación de ovocitos es aquella técnica de reproducción asistida en la cual el gameto femenino es aportado por una mujer distinta de la que recibirá éste o el embrión resultante. Indicaciones Mujeres sin fu…
Efecto de la quinagolida en la prevención del síndrome de hiperestimulación ovárica temprano
2013
El síndrome de hiperestimulación ovárico (SHO) es una de las más temidas complicaciones de las técnicas de reproducción asistida (TRA). Es una patología iatrogénica que puede presentarse en formas moderadas y graves y, en algunos casos, llevar la paciente a la muerte. Mujeres sometidas a las TRA necesitan pasar por un proceso denominado hiperestimulación ovárica controlada (HOC) este proceso puede tener una respuesta exacerbada en hasta un 20% de los casos y la evolución para SHO en su forma grave en aproximadamente un 4%. Actualmente no hay forma completamente eficaz para la prevención del SHO que no afecte los resultados de los tratamientos de TRA. Se ha demostrado en animales que los ago…
Novel inhibitors of mitochondrial respiratory chain: endoperoxides from the marine tunicate Stolonica socialis.
2001
The Mediterranean tunicate Stolonica socialis contains a new class of powerful cytotoxic acetogenins, generically named stolonoxides. In this paper, which also details the isolation and chemical characterization of a minor component (3a) of the tunicate extract, we report the potent inhibitory activity (IC(50) < 1 microM) of stolonoxides (1a and 3a) on mitochondrial electron transfer. The compounds affect specifically the functionality of complex II (succinate:ubiquinone oxidoreductase) and complex III (ubiquinol:cytochrome C oxidoreductase) in mammalian cells, thereby causing a rapid collapse of the whole energetic metabolism. This result, which differs from the properties of similar known…
A versatile ultrasound system for in vitro experiments
2015
Objective One of the most difficult tasks to achieve with the available instrumentations used to study the interaction between ultrasound (US) and cellular model systems is to design an experiment, where only the effects of one physical parameter at a time is evaluated, while all the others are kept constant. The set-ups are usually custom-made, often by means of clinical instrument intended for a different therapeutic purpose. Furthermore, the results are not strictly comparable with others obtained with techniques considered standard in molecular and cellular biology at this time, because there is the need to use non-standard devices to contain biological samples. Sterility, as well as te…