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Université de Fribourg

Inference of natural selection from ancient DNA

Dehasque, Marianne ; Ávila‐Arcos, María C. ; Díez‐del‐Molino, David ; Fumagalli, Matteo ; Guschanski, Katerina ; Lorenzen, Eline D. ; Malaspinas, Anna‐Sapfo ; Marques‐Bonet, Tomas ; Martin, Michael D. ; Murray, Gemma G. R. ; Papadopulos, Alexander S. T. ; Therkildsen, Nina Overgaard ; Wegmann, Daniel ; Dalén, Love ; Foote, Andrew D.

In: Evolution Letters, 2020, vol. 4, no. 2, p. 94–108

Evolutionary processes, including selection, can be indirectly inferred based on patterns of genomic variation among contemporary populations or species. However, this often requires unrealistic assumptions of ancestral demography and selective regimes. Sequencing ancient DNA from temporally spaced samples can inform about past selection processes, as time series data allow direct...

Université de Fribourg

A clinal polymorphism in the insulin signaling transcription factor foxo contributes to life-history adaptation in Drosophila*

Durmaz, Esra ; Rajpurohit, Subhash ; Betancourt, Nicolas ; Fabian, Daniel K. ; Kapun, Martin ; Schmidt, Paul ; Flatt, Thomas

In: Evolution, 2019, vol. 73, no. 9, p. 1774–1792

A fundamental aim of adaptation genomics is to identify polymorphisms that underpin variation in fitness traits. In Drosophila melanogaster, latitudinal life‐history clines exist on multiple continents and make an excellent system for dissecting the genetics of adaptation. We have previously identified numerous clinal single‐nucleotide polymorphism in insulin/insulin‐like growth factor...

Università della Svizzera italiana

MiR-221 influences effector functions and actin cytoskeleton in mast cells

Mayoral, Ramon J. ; Deho, Lorenzo ; Rusca, Nicole ; Bartonicek, Nenad ; Saini, Harpreet Kaur ; Enright, Anton J. ; Monticelli, Silvia

In: Plos one, 2011, vol. 6, no. 10, p. e26133

Mast cells have essential effector and immunoregulatory functions in IgE-associated allergic disorders and certain innate and adaptive immune responses, but the role of miRNAs in regulating mast cell functions is almost completely unexplored. To examine the role of the activation-induced miRNA miR-221 in mouse mast cells, we developed robust lentiviral systems for miRNA overexpression and...