FN Archimer Export Format PT J TI Epigenetic origin of adaptive phenotypic variants in the human blood fluke Schistosoma mansoni BT AF FNEICH, Sara THERON, Andre COSSEAU, Celine ROGNON, Anne ALIAGA, Benoit BUARD, Jerome DUVAL, David ARANCIBIA, Nathalie BOISSIER, Jerome ROQUIS, David MITTA, Guillaume GRUNAU, Christoph AS 1:1,2,5;2:1,2;3:1,2;4:1,2;5:1,2;6:3;7:1,2;8:1,2;9:1,2;10:1,2,4;11:1,2;12:1,2; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:; C1 UPVD, IHPE, 52 Ave Paul Alduy, F-66860 Perpignan, France. IHPE, CNRS, UMR 5244, F-66860 Perpignan, France. IGH, CNRS, UPR1142, F-34396 Montpellier, France. TUM, Liesel Beckmann Str 2, D-85354 Freising Weihenstephan, Germany. Univ Paris Saclay, UMR BDR, INRA, ENVA, F-78350 Jouy En Josas, France. C2 UNIV PERPIGNAN, FRANCE CNRS, FRANCE CNRS, FRANCE TUM, GERMANY UNIV PARIS SACLAY, FRANCE UM IHPE IN DOAJ IF 5.189 TC 12 UR https://archimer.ifremer.fr/doc/00615/72708/71730.pdf https://archimer.ifremer.fr/doc/00615/72708/71731.pdf https://archimer.ifremer.fr/doc/00615/72708/71732.xlsx https://archimer.ifremer.fr/doc/00615/72708/71733.pdf https://archimer.ifremer.fr/doc/00615/72708/71734.pdf LA English DT Article DE ;Epigenetics;Adaptive evolution;Compatibility polymorphism;Schistosoma mansoni AB Background: Adaptive evolution is not possible without the generation of phenotypic variants. The origin of these variations has been a central topic in evolutionary biology. Up to now, it was commonly accepted that standing genetic variation is the only cause of phenotypic variants. However, epigenetic information is emerging as a complementary source of heritable phenotypic variation that contributes to evolution. The relative importance of genetics and epigenetics in generating heritable phenotypic variation is nevertheless a matter of debate. Results: We used a host-parasite system to address this question. The human blood fluke Schistosoma mansoni can adapt rapidly to new intermediate snail hosts. The interaction between parasite and mollusk is characterized by a compatibility polymorphism illustrating the evolutionary dynamics in this system. The principal molecular marker for compatibility (infection success) is the expression pattern of a group of polymorphic mucins (SmPoMuc) in the parasite. We show here that chromatin structure changes as the SmPoMuc promoters are the cause for SmPoMuc transcription polymorphism leading to phenotypic novelty and increase in infection success, i.e., fitness. Conclusion: We establish that epigenetic changes can be the major if not only cause of adaptive phenotypic variants in Schistosoma mansoni, suggesting that epimutations can provide material for adaptive evolution in the absence of genetic variation in other systems. In addition, our results indicate that epidrugs can be used to control parasite development but also parasite evolution. PY 2016 PD JUN SO Epigenetics & Chromatin SN 1756-8935 PU Biomed Central Ltd VL 9 IS 27 UT 000379259600001 DI 10.1186/s13072-016-0076-2 ID 72708 ER EF