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Buenos Aires, Argentina

The National University of Quilmes is an Argentine national university and the most important one in the Quilmes area.The National University of Quilmes was founded on October 23, 1989. Located in Bernal , it serves the Southern Buenos Aires Metropolitan Area, home to three million people and 20% of the country’s industrial establishments.The UNQ has over eleven thousand students, distributed among its graduate courses and postgraduate courses of study. The University maintains 18 graduate programs , as well as 4 master's degree programs and 2 doctorates .The University’s stated mission is to teach in an environment of equality and diversity. Its essential functions are teaching, research, extension courses, human resources formation, technological development, productive innovation and culture promotion.The institution operates through a departmental structure. The Social science and the Science and Technology Departments, along with the Study and Research Center, provide teachers and researchers for the various diploma and degree courses of study taught at the University. Wikipedia.

Agency: Cordis | Branch: FP7 | Program: CP-TP | Phase: KBBE.2012.3.3-03 | Award Amount: 7.11M | Year: 2012

The European Life science and chemical industries increasingly depend on effi-cient, sustainable, and cost-effective bioprocessing platforms to remain competi-tive. A critical assessment of current bottlenecks during (bio) manufacturing clearly indicates that the recovery and purification of biologicals in large scale in responsible for many inefficiencies. INTENSO proposes an evaluation of the current situation of the downstream processing scenario with the aim of identifying inefficiencies and concomitantly introduce a debottlenecking overarching strategy. The later will be build up on the basis of a multidisciplinary approach, which considers opportunities to im-prove the process technology and underlying chemistry / biology and materials science at the same time. INTENSO will work alongside 4 technological axes, targeting promising and up-coming technologies and tailoring such technologies to the manufacturing of various classes of (bio) products. Intensification of individual unit operations and global process integration, as well as, dovetailing with fermentation / cell cultivation will be employed to the mentioned end. INTENSO will target new classes of (bio) products like Monoclonal Antibodies (Mabs), pDNA (e.g. for genetic vaccination), Virus Like Particles (VLP) or nano-plexes. All the mentioned new products are part of most industrial R&D pipelines and offer an excellent opportunity to introduce innovative bioprocessing. The results of the project are expected to contribute to the understanding of current industrial downstream processing practice, to the definition and alleviation of current inefficiencies, to the development and / or implementation of novel technologies, and to more efficient / sustainable and cost effective (bio) manufacturing. Various technologies will be studied utilizing a nano-to-process strategy so as to introduce integration / intensification during bioprocessing.

Perez A.P.,National University of Quilmes
International journal of nanomedicine | Year: 2011

Gene silencing using small interfering RNA (siRNA) is a promising new therapeutic approach for glioblastoma. The endocytic uptake and delivery of siRNA to intracellular compartments could be enhanced by complexation with polyamidoamine dendrimers. In the present work, the uptake mechanisms and intracellular traffic of siRNA/generation 7 dendrimer complexes (siRNA dendriplexes) were screened in T98G glioblastoma and J774 macrophages. The effect of a set of chemical inhibitors of endocytosis on the uptake and silencing capacity of dendriplexes was determined by flow cytometry. Colocalization of fluorescent dendriplexes with endocytic markers and occurrence of intracellular dissociation were assessed by confocal laser scanning microscopy. Uptake of siRNA dendriplexes by T98G cells was reduced by methyl-β-cyclodextrin, and genistein, and cytochalasine D, silencing activity was reduced by genistein; dendriplexes colocalized with cholera toxin subunit B. Therefore, caveolin-dependent endocytosis was involved both in the uptake and silencing activity of siRNA dendriplexes. On the other hand, uptake of siRNA dendriplexes by J774 cells was reduced by methyl-β-cyclodextrin, genistein, chlorpromazine, chloroquine, cytochalasine D, and nocodazole, the silencing activity was not affected by chlorpromazine, genistein or chloroquine, and dendriplexes colocalized with transferrin and cholera toxin subunit B. Thus, both clathrin-dependent and caveolin-dependent endocytosis mediated the uptake and silencing activity of the siRNA dendriplexes. SiRNA dendriplexes were internalized at higher rates by T98G but induced lower silencing than in J774 cells. SiRNA dendriplexes showed relatively slow dissociation kinetics, and their escape towards the cytosol was not mediated by acidification independently of the uptake pathway. The extent of cellular uptake of siRNA dendriplexes was inversely related to their silencing activity. The higher silencing activity of siRNA dendriplexes in J774 cells could be ascribed to the contribution of clathrin-dependent and caveolin-dependent endocytosis vs only caveolin-dependent endocytosis in T98G cells. Source

Golombek D.A.,National University of Quilmes
Philosophical transactions of the Royal Society of London. Series B, Biological sciences | Year: 2014

Biological clocks are genetically encoded oscillators that allow organisms to keep track of their environment. Among them, the circadian system is a highly conserved timing structure that regulates several physiological, metabolic and behavioural functions with periods close to 24 h. Time is also crucial for everyday activities that involve conscious time estimation. Timing behaviour in the second-to-minutes range, known as interval timing, involves the interaction of cortico-striatal circuits. In this review, we summarize current findings on the neurobiological basis of the circadian system, both at the genetic and behavioural level, and also focus on its interactions with interval timing and seasonal rhythms, in order to construct a multi-level biological clock. Source

In this transdisciplinary article which stems from philosophical considerations (that depart from phenomenology-after Merleau-Ponty, Heidegger and Rosen-and Hegelian dialectics), we develop a conception based on topological (the Moebius surface and the Klein bottle) and geometrical considerations (based on torsion and non-orientability of manifolds), and multivalued logics which we develop into a unified world conception that surmounts the Cartesian cut and Aristotelian logic. The role of torsion appears in a self-referential construction of space and time, which will be further related to the commutator of the True and False operators of matrix logic, still with a quantum superposed state related to a Moebius surface, and as the physical field at the basis of Spencer-Brown's primitive distinction in the protologic of the calculus of distinction. In this setting, paradox, self-reference, depth, time and space, higher-order non-dual logic, perception, spin and a time operator, the Klein bottle, hypernumbers due to Musès which include non-trivial square roots of ±1 and in particular non-trivial nilpotents, quantum field operators, the transformation of cognition to spin for two-state quantum systems, are found to be keenly interwoven in a world conception compatible with the philosophical approach taken for basis of this article. The Klein bottle is found not only to be the topological in-formation for self-reference and paradox whose logical counterpart in the calculus of indications are the paradoxical imaginary time waves, but also a classical-quantum transformer (Hadamard's gate in quantum computation) which is indispensable to be able to obtain a complete multivalued logical system, and still to generate the matrix extension of classical connective Boolean logic. We further find that the multivalued logic that stems from considering the paradoxical equation in the calculus of distinctions, and in particular, the imaginary solutions to this equation, generates the matrix logic which supersedes the classical logic of connectives and which has for particular subtheories fuzzy and quantum logics. Thus, from a primitive distinction in the vacuum plane and the axioms of the calculus of distinction, we can derive by incorporating paradox, the world conception succinctly described above. © 2009 Springer Science+Business Media, LLC. Source

Non-synonymous coding SNPs (nsSNPs) that are associated to disease can also be related with alterations in protein stability. Computational methods are available to predict the effect of single amino acid substitutions (SASs) on protein stability based on a single folded structure. However, the native state of a protein is not unique and it is better represented by the ensemble of its conformers in dynamic equilibrium. The maintenance of the ensemble is essential for protein function. In this work we investigated how protein conformational diversity can affect the discrimination of neutral and disease related SASs based on protein stability estimations. For this purpose, we used 119 proteins with 803 associated SASs, 60% of which are disease related. Each protein was associated with its corresponding set of available conformers as found in the Protein Conformational Database (PCDB). Our dataset contains proteins with different extensions of conformational diversity summing up a total number of 1023 conformers. The existence of different conformers for a given protein introduces great variability in the estimation of the protein stability (ΔΔG) after a single amino acid substitution (SAS) as computed with FoldX. Indeed, in 35% of our protein set at least one SAS can be described as stabilizing, destabilizing or neutral when a cutoff value of ±2 kcal/mol is adopted for discriminating neutral from perturbing SASs. However, when the ΔΔG variability among conformers is taken into account, the correlation among the perturbation of protein stability and the corresponding disease or neutral phenotype increases as compared with the same analysis on single protein structures. At the conformer level, we also found that the different conformers correlate in a different way to the corresponding phenotype. Our results suggest that the consideration of conformational diversity can improve the discrimination of neutral and disease related protein SASs based on the evaluation of the corresponding Gibbs free energy change. Source

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