Les méthodes formelles informatiques constituent un outil très puissant pour la modélisation des réseaux génétiques et en particulier pour l'étude de leur dynamique. La modélisation discrète de René Thomas permet à la fois de représenter judicieusement les connaissances biologiques et d'utiliser les méthodes formelles. Cependant, ces modèles présentent deux limitations principales : la combinatoire sous-jacente ne permet pas de traiter des réseaux de très grande taille et les aspects chronométriques ne sont pas pris en compte. Cette thèse offre deux contributions respectivement liées à ces questions. La modélisation des réseaux génétiques commence par la sélection des entités les plus pertinentes pour la question abordée. Les réseaux obtenus restent souvent trop grands et nous cherchons donc à les réduire sans altérer les propriétés dynamiques importantes. Ici, nous définissons un cadre entièrement formel inspiré d'une technique d'Aurélien Naldi pour la suppression de variables et de seuils. Ces réductions conservent les comportements asymptotiques et permettent de prouver formellement l'équivalence asymptotique de différents modèles publiés d'un même réseau. Pour prendre en compte les informations chronométriques cruciales dans certains systèmes (e.g. cycle circadien), nous définissons un formalisme hybride fondé sur le formalisme de Thomas où les niveaux d'expression sont discrets, mais le temps continu. Ce cadre permet de construire un modèle abstrait de l'horloge circadienne des mammifères qui explique avec très peu de variables les propriétés de robustesse face à des changements de durées des alternances jour/nuit. / Formal methods from computer science constitute a powerful tool for the modelling of gene networks, including the study of their dynamics. The discrete modelling of René Thomas allows for a proper representation of biological knowledge as well as for use of formal methods. These models have two main limitations: the underlying combinatorics does not allow one to process very large networks, and the chronometric aspects are not taken into account. This thesis offers two contributions according to these issues. The design of gene network models begins with a selectiCalibrion of the most relevant entities. The resulting networks are often too large, and we show how to reduce them without altering the important dynamic properties. Here, we define a completely formal framework, inspired by a technique from Aurélien Naldi, driving the suppression of variables or thresholds. These reductions preserve the asymptotic behaviour. We formally prove the asymptotic equivalence of different published models for the same network. In order to take into account chronometric information that are crucial in some systems (e.g. circadian cycle), we define a hybrid formalism based on the Thomas' formalism where expression levels are discrete but time is continuous. This framework allows for the construction of an abstract model of the circadian clock in mammals. The model explains with very few variables the robustness of the system when submitted to duration changes of the day/night alternation.

Magister Pharmaceuticae - MPharm / Medicines have to be regulated in an effort to monitor their quality, safety, and efficacy. The process of medicines registration is lengthy, costly, and document-heavy. Many countries have limited expertise and resources at national medicines regulatory authorities (NMRAs) and some countries have adopted unified approaches to medicines registration legislation. Harmonised guidelines and initiatives have been adopted in South Africa and the Southern African Development Community (SADC). However, there are no studies that have identified the effects of these initiatives and guidelines on major stakeholders such as the pharmaceutical industry and regulators.

The decline in the profitability of credit unions with less than $10 million in assets harms the number of small credit unions available to serve local communities. Grounded in the financial intermediation theory, the purpose of this quantitative correlational study was to examine the relationship between regulatory compliance costs, operation costs, and profitability. The population of this study consisted of federally insured credit unions with less than $10 million in assets and located in the state of Texas. Archival data from the National Credit Union Administration database were collected and analyzed. Multiple regression was used to identify a statistically significant predictive model, F (2, 49) = 3.834, p = .028, R2 =.135. The implications for positive social change include the potential for credit union managers to improve decision-making processes related to current and future operations and investments, which could increase profitability and contribute to the financial prosperity of employees, employees' families, communities, and local economies.

A research study is undertaken to determine if economic incentives exist for noncompliance with regulatory standards, and if accounting related disclosure of regulatory enforcement actions is a determinant of environmental performance.

Purpose: A few de novo missense variants in the cytoplasmic FMRP-interacting protein 2 (CYFIP2) gene have recently been described as a novel cause of severe intellectual disability, seizures, and hypotonia in 18 individuals, with p.Arg87 substitutions in the majority. Methods: We assembled data from 19 newly identified and all 18 previously published individuals with CYFIP2 variants. By structural modeling and investigation of WAVE-regulatory complex (WRC)-mediated actin polymerization in six patient fibroblast lines we assessed the impact of CYFIP2 variants on the WRC. Results: Sixteen of 19 individuals harbor two previously described and 11 novel (likely) disease-associated missense variants. We report p.Asp724 as second mutational hotspot (4/19 cases). Genotype–phenotype correlation confirms a consistently severe phenotype in p.Arg87 patients but a more variable phenotype in p.Asp724 and other substitutions. Three individuals with milder phenotypes carry putative loss-of-function variants, which remain of unclear pathogenicity. Structural modeling predicted missense variants to disturb interactions within the WRC or impair CYFIP2 stability. Consistent with its role in WRC-mediated actin polymerization we substantiate aberrant regulation of the actin cytoskeleton in patient fibroblasts. Conclusion: Our study expands the clinical and molecular spectrum of CYFIP2-related neurodevelopmental disorder and provides evidence for aberrant WRC-mediated actin dynamics as contributing cellular pathomechanism.

Submitted to the faculty of Indiana University in partial fulfillment of the requirements for the degree Master of Science in the department of Bioinformatics in School of Informatics of Indiana University 29 January, 2004 / Background: Toll and Toll-related proteins play an important role in antibacterial innate immunity and are widespread in insects, plants, and mammals. The completion of new genomes such as Anopheles gambiae has provided an avenue for a deeper understanding of Toll evolution. While most evolutionary analyses are performed on protein sequences, here, we present a unique phylogenetic analysis of Toll genes from the perspective of upstream regulatory regions so as to study the importance of evolutionary information inherited in such sequences. Results: In a comparative study, phylogeny on the protein products of Toll like genes showed consistency with earlier literature except for the single point of divergence between insects and mammals. On the other hand, the phylogeny based on upstream regulatory sequences (-3000 to +10) showed a broader distinction between the plants and the rest, though the tree was not well resolved probably due to poor alignment of these sequences. The phylogeny based on TFBs necessitated the development of a supervised statistical approach to determine their “evolutionary informativeness”. Employing the frequency of evolutionarily informative TFBs, a phylogeny was derived using pair-wise distances. It suggested a closer relationship between Anopheles and plants than to Drosophila and a significant homology among mammalian TLRs. Conclusions: A unique approach of using TFBs in studying evolution of Toll genes has been developed. Broadly, this approach showed results similar to the protein phylogeny. The inclusion of the evolutionary information from TFBs may be relevant to such analyses due to the selective pressure of conservation in upstream sequences.

Magister Pharmaceuticae - MPharm / Regulatory Affairs (RA), within the pharmaceutical business, could be a profession that covers different registration parameters of a pharmaceutical product. This is a profession that was developed to protect the public by providing smart, quality, safe and efficacious pharmaceutical products. However, it is not clear if the personnel possess the fundamental education and training required to perform the roles and responsibilities in this profession. The study aimed to explore the educational training and role of RA associates/officers in pharmaceutical corporations in Gauteng, South Africa. The study was a cross-sectional survey, which utilized Google forms with both open and closed-ended questions. Using descriptive statistics, it was found that the majority of the participants (78.3%) (RA assistants, officers, and scientists) indicated that the knowledge for most of the responsibilities they carry out was acquired through informal training (i.e., learning on the job).

Magister Pharmaceuticae - MPharm / In Central American countries (Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and Panama) and Dominican Republic (DR) the approval timelines for major changes are described ranging from 12 to 18 months, these timelines are considerably extensive. Other countries or regions applying FDA post-approval change and EMA post-approval variation guidelines have timelines of 6 months or less (Hoath et al, 2016, Murray, 2016). The research aims to identify opportunities for alignment of the post-approval changes categories of Central America (CA) and Dominican Republic (DR) National Regulatory Agencies (NRA) with the riskbased categories of FDA and EMA as encouraged by the ICH. The FDA and EMA are considered reference authorities for many countries, as they are Stringent Authorities.

No description available.

The regulatory sandbox is a special regime provided by regulators and super- visory authorities to market participants for testing their innovative business models, while temporarily reducing certain regulatory requirements. It is a very recent topic and so far its impact has not been sufficiently empirically tested. However, the empirical evidence may be crucial for the authorities hesitating to adopt their regulatory sandboxes. The main contribution of this thesis is the empirical testing of the effect of the sandbox on the investments into FinTech in three European countries, using the Synthetic control method. The yearly aggregate amounts and numbers of FinTech investments were selected as mea- surable indices of the FinTech sector development. The most significant results show that in the United Kingdom, the aggregate yearly amounts invested into FinTech grew considerably compared to the values of the synthetic control unit, after the sandbox introduction. For the other two tested countries (the Nether- lands, Denmark), no significant outcomes were observed due to insufficiency of data. In the theoretical part, this thesis gathers information about the existing regulatory sandboxes in European countries. Also, the author seeks to outline the main legal issues related to the regulatory sandbox...