Search results for "mito"
showing 10 items of 2513 documents
Rho GTPases in human breast tumours: expression and mutation analyses and correlation with clinical parameters
2002
In the present study, we addressed the question of a putative relevance of Rho proteins in tumour progression by analysing their expression on protein and mRNA level in breast tumours. We show that the level of RhoA, RhoB, Rac1 and Cdc42 protein is largely enhanced in all tumour samples analysed (n=15) as compared to normal tissues originating from the same individual. The same is true for 32P-ADP-ribosylation of Rho proteins which is catalysed by Clostridium botulinum exoenzyme C3. Also the amount of Rho-GDI and ERK2 as well as the level of overall 32P-GTP binding acvitity was tumour-specific elevated, yet to a lower extent than Rho proteins. Although the amount of Rho proteins was enhance…
El pensamiento racional y la visión trágica de los griegos
2020
Curso de Altos Estudios en Pensamiento y Cultura de la Antigüedad Clásica(ANCLA),impartido en el Programa Universitario para Mayores de la Universitat de València, La Nau Gran y la Facultat de Filosofia i Ciències de l’Educació de la Universitat de València.
Biological and Proteomic Characterization of the Anti-Cancer Potency of Aqueous Extracts from Cell-Free Coelomic Fluid of Arbacia lixula Sea Urchin i…
2022
Echinoderms are an acknowledged source of bioactive compounds exerting various beneficial effects on human health. Here, we examined the potential in vitro anti-hepatocarcinoma effects of aqueous extracts of the cell-free coelomic fluid obtained from the sea urchin Arbacia lixula using the HepG2 cell line as a model system. This was accomplished by employing a combination of colorimetric, microscopic and flow cytometric assays to determine cell viability, cell cycle distribution, the possible onset of apoptosis, the accumulation rate of acidic vesicular organelles, mitochondrial polarization, cell redox state and cell locomotory ability. The obtained data show that exposed HepG2 cells under…
Antioxidant Therapies and Oxidative Stress in Friedreich´s Ataxia: The Right Path or Just a Diversion?
2020
Friedreich's ataxia is the commonest autosomal recessive ataxia among population of European descent. Despite the huge advances performed in the last decades, a cure still remains elusive. One of the most studied hallmarks of the disease is the increased production of oxidative stress markers in patients and models. This feature has been the motivation to develop treatments that aim to counteract such boost of free radicals and to enhance the production of antioxidant defenses. In this work, we present and critically review those 'antioxidant' drugs that went beyond the disease's models and were approved for its application in clinical trials. The evaluation of these trials highlights some …
recensione a C. Jourdain-Annequin, Héraklès aux portes du soir. Mythe et histoire, Annales Littéraires de Besançon, n. 402 (Centre de Recherches d'Hi…
2000
recensione al volume in francese su mito, colonizzazione e costruzione della memoria nella Grecia antica, in Uomo § Cultura. Rivista di studi antropologici, 45-52, 1990-1993, pp. 235-239. ISBN 88-7804-0118
Terapias de reemplazo mitocondrial en la línea germinal y sus aplicaciones clínicas
2015
Las mitocondrias son unos orgánulos semiautónomos que contienen su propio genoma. Su papel principal es proveer a las células de energía metabólica en forma de ATP generado a través de la oxidación fosforilativa. Las manifestaciones clínicas de las enfermedades mitocondriales varían, pero frecuentemente afectan a órganos y tejidos con gran demanda energética. La expresión y severidad de los síntomas, de dichas enfermedades, dependen de la mutación en sí y de los niveles de heteroplasmia. Actualmente no existe ningún tratamiento para las enfermedades mitocondriales, los únicos disponibles solo alivian los síntomas e intentan retrasar la progresión de la misma, por lo tanto, todos los esfuerz…
Reprogramación celular, dinámica mitocondrial y metabolismo
2016
La reprogramación celular es el proceso de reconversión del destino celular somático a un estado pluripotente similar al de las células madre embrionarias. Dadas las importantes diferencias entre ambos estados, esta transformación supone una profunda reorganización del fenotipo celular a todos los niveles. Para ello, las células somáticas deben sortear una serie de barreras celulares y moleculares a lo largo de este proceso hasta alcanzar su destino final de célula madre pluripotente inducida. Entre las importantes diferencias que presentan ambos tipos celulares resaltan la morfología mitocondrial y el metabolismo celular: durante la reprogramación celular las células somáticas tienen que m…
Tra calunnia e inganno: strategia della parola nella Fedra di Seneca
2013
Il comportamento comunicativo di Fedra crea un corto circuito da cui si sprigiona il pathos del dramma senecano. Nel tessuto tragico confluiscono infatti aspetti della comunicazione quali la manipolazione, l’inganno e la calunnia che mediano il trapasso fra passione e menzogna degradando il portato metaforico della protagonista. Nucleo e vettore di propulsione della struttura drammatica della Phaedra di Seneca è infatti la potenza della parola che svela e nasconde fra trasparenza e indecifrabilità sottraendosi alla chiarezza della verità per farsi sottile strumento di menzogna. Phedra's communicative behaviour creates a short circuit from which the pathos of Seneca drama emanates through so…
Rho GTPases are over-expressed in human tumors.
1999
Small GTPases of the Rho family are involved in the regulation of a variety of cellular processes, such as the organization of the microfilamental network, cell-cell contact and malignant transformation. To address the question of whether Rho proteins are involved in carcinogenesis in man, we compared their expression in tumors from colon, breast and lung with that of the corresponding normal tissue originating from the same patient. As shown by Rho-specific 32P-ADP-ribosylation, as well as Western-blot analysis, the amount of RhoA protein was largely increased in all 3 types of tumors tested. The most dramatic differences in the expression of Rho GTPases were observed in breast tissue. All…
Late Activation of Stress-activated Protein Kinases/c-Jun N-terminal Kinases Triggered by Cisplatin-induced DNA Damage in Repair-defective Cells
2011
Although stress-activated protein kinases/c-Jun N-terminal kinases (SAPK/JNK) are rapidly activated by genotoxins, the role of DNA damage in this response is not well defined. Here we show that the SEK1/MKK4-mediated dual phosphorylation of SAPK/JNK (Thr-183/Tyr-185) correlates with the level of cisplatin-DNA adducts at late times (16–24 h) after drug treatment in both human and mouse cells. Transfection of platinated plasmid DNA also caused SAPK/JNK activation. A defect in transcription-coupled nucleotide excision repair resting on a mutation in Cockayne syndrome group B protein promoted the late SAPK/JNK activation following cisplatin exposure. Signaling to SAPK/JNK was accompanied by act…