133 research outputs found
Sugar VersatilityâChemical and Bioprocessing of Many Phytobiomass Polysaccharides Using a Milder Hydrolytic Catalyst: Diluted Thermopressurized Phosphoric Acid
Phytobiomasses, given the qualitative and quantitative dominance of polysaccharides, are a dominant wealth available in nature. Cellulose and hemicelluloses from softwoods, hardwoods and grasses, starch from tubercles and roots, pectins from fruits and gums from some seeds may be explored as such or following acid or alkaline pretreatments as well enzymatic deconstruction, and even simple chemical derivatization toward more added-value products. A general view in the chemistry of these valuable polymers is here broached, following a sharper focus on acid pretreatments for L(h)Câligno(hemi)cellulosic materials from sugarcane and other feedstocks. Our particular experience using a gentler proton donor but keeping very advantageous aspects for polysaccharide chemo/biotechnological processingâthermopressurized diluted phosphoric acid (oPA)âis presented with a more detailed description as a result of its validity for the hydrolytic deconstruction of hemicellulosesâheteroxylans and heteromannans, cassava starch, dahlia inulin and mixed glucans from microalgae cell walls. The opportunity of NOsânutraceutical oligosacchridesâgeneration from these particular glycopolymers is also shortly commented
PSMA-Specific CAR-Engineered T Cells Eradicate Disseminated Prostate Cancer in Preclinical Models.
Immunology-based interventions have been proposed as a promising curative chance to effectively attack postoperative minimal residual disease and distant metastatic localizations of prostate tumors. We developed a chimeric antigen receptor (CAR) construct targeting the human prostate-specific membrane antigen (hPSMA), based on a novel and high affinity specific mAb. As a transfer method, we employed last-generation lentiviral vectors (LV) carrying a synthetic bidirectional promoter capable of robust and coordinated expression of the CAR molecule, and a bioluminescent reporter gene to allow the tracking of transgenic T cells after in vivo adoptive transfer. Overall, we demonstrated that CAR-expressing LV efficiently transduced short-term activated PBMC, which in turn were readily stimulated to produce cytokines and to exert a relevant cytotoxic activity by engagement with PSMA+ prostate tumor cells. Upon in vivo transfer in tumor-bearing mice, CAR-transduced T cells were capable to completely eradicate a disseminated neoplasia in the majority of treated animals, thus supporting the translation of such approach in the clinical setting
Dissecting the effect of soil on plant phenology and berry transcriptional plasticity in two Italian grapevine varieties (Vitis vinifera L.)
Grapevine embodies a fascinating species as regards phenotypic plasticity and genotype-per-environment interactions. The terroir, namely the set of agri-environmental factors to which a variety is subjected, can influence the phenotype at the physiological, molecular, and biochemical level, representing an important phenomenon connected to the typicality of productions. We investigated the determinants of plasticity by conducting a field-experiment where all terroir variables, except soil, were kept as constant as possible. We isolated the effect of soils collected from different areas, on phenology, physiology, and transcriptional responses of skin and flesh of a red and a white variety of great economic value: Corvina and Glera. Molecular results, together with physio-phenological parameters, suggest a specific effect of soil on grapevine plastic response, highlighting a higher transcriptional plasticity of Glera in respect to Corvina and a marked response of skin compared to flesh. Using a novel statistical approach, we identified clusters of plastic genes subjected to the specific influence of soil. These findings could represent an issue of applicative value, posing the basis for targeted agricultural practices to enhance the desired characteristics for any soil/cultivar combination, to improve vineyards management for a better resource usage and to valorize vineyards uniqueness maximizing the terroir-effect
Improvement of diaphragmatic performance through orthotopic application of decellularized extracellular matrix patch.
AbstractMuscle tissue engineering can provide support to large congenital skeletal muscle defects using scaffolds able to allow cell migration, proliferation and differentiation. Acellular extracellular matrix (ECM) scaffold can generate a positive inflammatory response through the activation of anti-inflammatory T-cell populations and M2 polarized macrophages that together lead to a local pro-regenerative environment. This immunoregulatory effect is maintained when acellular matrices are transplanted in a xenogeneic setting, but it remains unclear whether it can be therapeutic in a model of muscle diseases. We demonstrated here for the first time that orthotopic transplantation of a decellularized diaphragmatic muscle from wild animals promoted tissue functional recovery in an established atrophic mouse model. In particular, ECM supported a local immunoresponse activating a pro-regenerative environment and stimulating host muscle progenitor cell activation and migration. These results indicate that acellular scaffolds may represent a suitable regenerative medicine option for improving performance of diseased muscles
Grapevine field experiments reveal the contribution of genotype, the influence of environment and the effect of their interaction (GXE) on the berry transcriptome
Changes in the performance of genotypes in different environments are defined as genotype x environment
(G x E) interactions. In grapevine (Vitis vinifera), complex interactions between different genotypes and cli-
mate, soil and farming practices yield unique berry qualities. However, the molecular basis of this phe-
nomenon remains unclear. To dissect the basis of grapevine G x E interactions we characterized berry
transcriptome plasticity, the genome methylation landscape and within-genotype allelic diversity in two
genotypes cultivated in three different environments over two vintages. We identified, through a novel
data-mining pipeline, genes with expression profiles that were: unaffected by genotype or environment,
genotype-dependent but unaffected by the environment, environmentally-dependent regardless of geno-
type, and GxE-related. The GxE-related genes showed different degrees of within-cultivar allelic diversity
in the two genotypes and were enriched for stress responses, signal transduction and secondary metabo-
lism categories. Our study unraveled the mutual relationships between genotypic and environmental vari-
ables during GxE interaction in a woody perennial species, providing a reference model to explore how
cultivated fruit crops respond to diverse environments. Also, the pivotal role of vineyard location in deter-
mining the performance of different varieties, by enhancing berry quality traits, was unraveled
A inclusão da perspectiva do paciente na consulta médica: um desafio na formação do médico
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