The use of computer-aided mathematical simulations todescribe biological processes and systems is actually a fundamentalpart of systems biology. The objective ALK Inhibitors of suchsimulations is actually a model-based prediction of the behaviourand the dynamics of biological systems. In this manuscript,focus is placed on the role of modelling and simulationin systems pharmacology and paediatric diseases. Inthis context, models is often used to quantitatively characterisehow drugs impact the dynamics of biological systems aswell as the regulatory mechanisms triggered by a givenpharmacological intervention.Because of the complexity of biological systems simplifiedmodels are typically used. Nevertheless, the good quality of modelbasedpredictions strongly depends upon the good quality of themodel, which in turn is defined by the good quality of the data andthe profoundness of the expertise it is depending on.
Whilstsimplified models have been particularly helpful for interpretingclinical ALK Inhibitors data and building novel biomarkers, complexmodels may be necessary to predict the overall clinicalresponse or to quantify the role of modulating individualpathways or targets in well being and disease circumstances.These specifications have resulted into two differentapproaches for the evaluation of the dynamics of biologicalsystems, namely a “bottom–up” as well as a “top–down” approach.The “bottom–up” approach, historically used by biologists,brings with each other all the recognized pieces at a subsystem level withthe objective of identifying a formal structure of the wholesystem; a clear drawback is that it does not account forpossible unknown elements.
In contrast, the “top–down”approach departs from an observable and clinically relevantbehaviour mapk inhibitor and after that iteratively identifies the biologicalcomponents, which could yield or result in such behaviour.Both approaches are complementary and have a wide range ofapplications. Regardless of the differences in the focus ofeach approach, over the last couple of years, it has NSCLC turn out to be clearthat to totally realize the complexity of biologicalorganisms they should be studied as entire systems; the“top–down” approach seems to satisfy this requirement.The use ofM&S in drug development has contributed to theadvancement of translational research, allowing the analysis ofcomplex biological systems and their interactions withchemical and biological entities.This field has evolved into what is currently defined as systemspharmacology.
In conjunction with additional statistical concepts,M&S has turn out to be a powerful tool for predicting mapk inhibitor drugeffects across a wide range of circumstances, including extrapolationfrom in vitro to in vivo, from animal to humans, fromhealth to disease, from short- to long-term effects.Regardless of the increase in the use of M&S as tools fordecision-making in pharmaceutical R&D, their benefits as anoptimisation and data analysis tool has remained undervaluedand sometimes ignored by key stakeholders. Thisattitude appears contradictory to ethical and scientific tenets,which should underpin the evaluation of the risk–benefitratio in special populations, such as children. The ethicalconstraints and practical limitations associated with clinicalresearch clearly impose new alternative methodology toensure accurate assessment of treatment response in thesepatients.
In that sense, the value of M&S to paediatricresearch may be even greater than the evidence available sofar for drug development in adults. The interest in M&S isalso reaching the ALK Inhibitors attention of the regulatory authorities. InApril 2008, the European Medicines Agencyorganiseda “Workshop on Modelling in Paediatric Medicines”. More recently, M&S have been proposed as aframework for the evaluation of drugs by regulators takinginto account different clinical scenarios.Clinical research in paediatric diseasesAs indicated previously, the purpose of the manuscript is toevaluate the use of M&S as an alternative approach to thedesign, analysis and interpretation of experiments andclinical protocols in paediatric drug development.
Despitesome limitations, M&S enable systematic, integratedevaluation of drug and disease properties, providingquantitative measures of treatment response across a widerange of clinical and statistical designs, some mapk inhibitor of whichwould not be feasible in real-life. Furthermore, M&S can overcome many of thepitfalls associated with the use of empirical protocols andisolated, sequential developability criteria.One of the greatest challenges in paediatric drug research isto find the appropriate dosing regimen. It should be noted thatin spite of the ICH E11’s explicit requirement for appropriateevaluation of medicinal products for children, today about70% of the medicines given to the paediatric population and93% of the medicines given to critically ill neonates remainunlicensed or used off-label. Even if a large numberof studies have been performed in paediatrics over the lastfew decades, the empiricism upon which clinical drugdevelopment is based typically results in ineffective or unsafetreatments. To ensure that appropriate dose rationale
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