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• W1994206557 endingPage "e1000569" @default.
• W1994206557 startingPage "e1000569" @default.
• W1994206557 abstract "The isthmic organizer mediating differentiation of mid- and hindbrain during vertebrate development is characterized by a well-defined pattern of locally restricted gene expression domains around the mid-hindbrain boundary (MHB). This pattern is established and maintained by a regulatory network between several transcription and secreted factors that is not yet understood in full detail. In this contribution we show that a Boolean analysis of the characteristic spatial gene expression patterns at the murine MHB reveals key regulatory interactions in this network. Our analysis employs techniques from computational logic for the minimization of Boolean functions. This approach allows us to predict also the interplay of the various regulatory interactions. In particular, we predict a maintaining, rather than inducing, effect of Fgf8 on Wnt1 expression, an issue that remained unclear from published data. Using mouse anterior neural plate/tube explant cultures, we provide experimental evidence that Fgf8 in fact only maintains but does not induce ectopic Wnt1 expression in these explants. In combination with previously validated interactions, this finding allows for the construction of a regulatory network between key transcription and secreted factors at the MHB. Analyses of Boolean, differential equation and reaction-diffusion models of this network confirm that it is indeed able to explain the stable maintenance of the MHB as well as time-courses of expression patterns both under wild-type and various knock-out conditions. In conclusion, we demonstrate that similar to temporal also spatial expression patterns can be used to gain information about the structure of regulatory networks. We show, in particular, that the spatial gene expression patterns around the MHB help us to understand the maintenance of this boundary on a systems level." @default.
• W1994206557 created "2016-06-24" @default.
• W1994206557 creator A5012682546 @default.
• W1994206557 creator A5027520924 @default.
• W1994206557 creator A5055560522 @default.
• W1994206557 creator A5068735853 @default.
• W1994206557 creator A5073113630 @default.
• W1994206557 creator A5077974832 @default.
• W1994206557 date "2009-11-20" @default.
• W1994206557 modified "2023-10-09" @default.
• W1994206557 title "Spatial Analysis of Expression Patterns Predicts Genetic Interactions at the Mid-Hindbrain Boundary" @default.
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