Search results for " delta"
showing 10 items of 154 documents
Sedimentation and tropical vegetation changes in Southern Benin (West Africa), carbon-13 tracing of organic matter dynamics and fluctuations of the s…
2007
International audience
Reconstitution des environnements de dépôtdu Carbonifère supérieur/ Permien inférieurau Sud du bassin de Paris : implicationgéodynamique
2016
National audience; La période Carbonifère-Permien marque un changement drastiquede régime tectonique (fin de l’Orogenèse hercynienne -début d’une phase de rifting). Cette transition s’enregistre dansles bassins sédimentaires contemporains. En Europe de l’Ouest,ces bassins, principalement constitués de sédiments continentauxet de séries volcano-sédimentaires (largement sous-estimées),sont mal contraints sur beaucoup d’aspects (sédimentaire, tectonique,volcanique et corrélations spatio-temporelles). Le cadrechronologique de ces bassins est également mal connu dans lamesure où les principaux âges ont été estimés par palynologie àpartir de faciès floristiques ayant pu coexister dans le temps.Un…
Single-cell RNA sequencing unveils the shared and the distinct cytotoxic hallmarks of human TCRVδ1 and TCRVδ2 γδ T lymphocytes
2019
γδ T lymphocytes represent ∼1% of human peripheral blood mononuclear cells and even more cells in most tissues of vertebrates. Although they have important anticancer functions, most current single-cell RNA sequencing (scRNA-seq) studies do not identify γδ T lymphocytes because their transcriptomes at the single-cell level are unknown. Here we show that high-resolution clustering of large scRNA-seq datasets and a combination of gene signatures allow the specific detection of human γδ T lymphocytes and identification of their T cell receptor (TCR)Vδ1 and TCRVδ2 subsets in large datasets from complex cell mixtures. In t -distributed stochastic neighbor embedding plots from blood and tumor sa…
Determinación de anticuerpos anti-Anisakis y relación con las subpoblaciones linfocitarias αβ Y γδ en pacientes con Enfermedad de Crohn
2015
La enfermedad de Crohn (EC) es una enfermedad de etiopatogenia y fisiopatología compleja, que se desarrolla sobre una base de múltiples alteraciones inmunes, tanto de la inmunidad innata como de la inmunidad adquirida. Siguiendo nuestra línea de investigación en relación a la deficiencia de LTγδ en pacientes con enfermedad de Crohn, planteamos la hipótesis de trabajo de que parásitos como Anisakis simplex, ingerido frecuentemente mediante el consumo de pescado, podrían aprovechar este estado de inmunidad alterada en la enfermedad de Crohn para infectar con mayor frecuencia a estos pacientes que a la población sana. Hemos realizado un estudio prospectivo de casos y controles desde junio de 2…
Immunotherapy targeting colon cancer stem cells
2010
In the last 10 years, cancer stem cells have interested the scientific community because this small tumorigenic population is also associated with tumor progression in human patients and specific targeting of cancer stem cells could be a strategy to eradicate cancers currently resistant to conventional therapy. Clinical studies have recently demonstrated that adding immune therapy to chemotherapy has survival benefits in comparison with chemotherapy alone that can sensitize tumors to immune cell-mediated killing (e.g., increasing sensitivity of tumor cells to subsequent cytotoxicity by T cells via upregulation of death receptors DR5 and Fas). However, loss of MHC molecules is often observe…
Thymine content of sea water as a measure of biosynthetic potential
1977
A hydrolysis procedure along with a high-pressure liquid chromatographic procedure is given enabling simple and reliable thymine determinations in the nanogram range in different fractions of sea-water samples taken from three different locations in the Northern Adriatic Sea. The levels corresponded to 1–3 μg DNA per liter. From total polyanionic thymine, which had been precipitated as the cetyltrimethylammonium salt, the highest percentage was linked to the particulate fraction, with a definite subsurface minimum at 10 to 15 m. There was a corresponding maximum of a high molecular “non-particulate” thymine-containing fraction at the corresponding depth. From the bottom at 30 m upwards to a…
Upper Miocene siliciclastic depositional systems in the central-eastern Sicily basins
2014
The expanding universe of gamma delta T lymphocytes: subsets, generation and function
2008
Differentiation, phenotype, and function of interleukin-17-producing human V{gamma}9V{delta}2 T cells
2011
V gamma 9V delta 2 T lymphocytes efficiently recognize and kill zoledronate-sensitized, imatinib-sensitive, and imatinib-resistant chronic myelogenou…
2010
Abstract Imatinib mesylate (imatinib), a competitive inhibitor of the BCR-ABL tyrosine kinase, is highly effective against chronic myelogenous leukemia (CML) cells. However, because 20–30% of patients affected by CML display either primary or secondary resistance to imatinib, intentional activation of Vγ9Vδ2 T cells by phosphoantigens or by agents that cause their accumulation within cells, such as zoledronate, may represent a promising strategy for the design of a novel and highly innovative immunotherapy capable to overcome imatinib resistance. In this study, we show that Vγ9Vδ2 T lymphocytes recognize, trogocytose, and efficiently kill imatinib-sensitive and -resistant CML cell lines pre…