المؤلفون: Gouveia, Analuce Canha, Marcelino, Hugo Miguel Rocha, Gonçalves, Lisa, Palmeirim, Isabel, Andrade, Raquel P.

مصطلحات موضوعية: Animals, Chick Embryo, Chickens, Embryonic Development, Gene Expression Regulation, Developmental, Homeodomain Proteins, In Situ Hybridization, Mesoderm, Hox genes, Hox code, spatial collinearity, temporal collinearity, temporal control, Ciências Médicas::Medicina Básica, Science & Technology

الوصف: The developing embryo is a paradigmatic model to study molecular mechanisms of time control in Biology. Hox genes are key players in the specification of tissue identity during embryo development and their expression is under strict temporal regulation. However, the molecular mechanisms underlying timely Hox activation in the early embryo remain unknown. This is hindered by the lack of a rigorous temporal framework of sequential Hox expression within a single cluster. Herein, a thorough characterization of HoxB cluster gene expression was performed over time and space in the early chick embryo. Clear temporal collinearity of HoxB cluster gene expression activation was observed. Spatial collinearity of HoxB expression was evidenced in different stages of development and in multiple tissues. Using embryo explant cultures we showed that HoxB2 is cyclically expressed in the rostral presomitic mesoderm with the same periodicity as somite formation, suggesting a link between timely tissue specification and somite formation. We foresee that the molecular framework herein provided will facilitate experimental approaches aimed at identifying the regulatory mechanisms underlying Hox expression in Time and Space. ; Fundação para a Ciência e a Tecnologia (FCT), Portugal (grants PTDC/SAU-OBD/105111/2008, UMINHO/BI/7/2014 and SFRH/BPD/65652/2009, respectively). RPA was funded by a Ciencia2007 Program Contract and Programa Operacional Regional do Norte (ON.2) – NORTE-07–0124-FEDER-000017. This work was supported by national Portuguese funding through FCT (National and FEDER COMPETE Program funds: PTDC/SAU-BID/121459/2010 and PTDC/SAU-OBD/099758/2008 to RPA and IP, respectively), and by PEst-OE/EQB/LA0023/2011

وصف الملف: application/pdf

العلاقة: Gouveia, A., Marcelino, H. M., Gonçalves, L., Palmeirim, I., & Andrade, R. P. (2015). Patterning in time and space: HoxB cluster gene expression in the developing chick embryo. Cell Cycle, 14(1), 135-145.; http://hdl.handle.net/1822/62234Test

الإتاحة: https://doi.org/10.4161/15384101.2014.972868Test
http://hdl.handle.net/1822/62234Test

المؤلفون: Analuce Gouveia, L. C. Goncalves, Hugo M Marcelino, Isabel Palmeirim, Raquel P. Andrade

المساهمون: Universidade do Minho

المصدر: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

مصطلحات موضوعية: Morphology, Mesoderm, animal structures, Mouse, Medicina Básica [Ciências Médicas], temporal control, Embryonic Development, In situ hybridization, Chick Embryo, Biology, Hox genes, Establishment, Information, Hox code, Gene expression, medicine, Paraxial mesoderm, Animals, Hox gene, Molecular Biology, In Situ Hybridization, Genetics, Homeodomain Proteins, Science & Technology, Embryogenesis, Gastrulation, spatial collinearity, Asymmetry, Gene Expression Regulation, Developmental, Embryo, Cell Biology, Cell biology, Vertebrate embryo, Somite, medicine.anatomical_structure, embryonic structures, Ciências Médicas::Medicina Básica, temporal collinearity, Segmentation clock, Chickens, Reports, Developmental Biology

الوصف: The developing embryo is a paradigmatic model to study molecular mechanisms of time control in Biology. Hox genes are key players in the specification of tissue identity during embryo development and their expression is under strict temporal regulation. However, the molecular mechanisms underlying timely Hox activation in the early embryo remain unknown. This is hindered by the lack of a rigorous temporal framework of sequential Hox expression within a single cluster. Herein, a thorough characterization of HoxB cluster gene expression was performed over time and space in the early chick embryo. Clear temporal collinearity of HoxB cluster gene expression activation was observed. Spatial collinearity of HoxB expression was evidenced in different stages of development and in multiple tissues. Using embryo explant cultures we showed that HoxB2 is cyclically expressed in the rostral presomitic mesoderm with the same periodicity as somite formation, suggesting a link between timely tissue specification and somite formation. We foresee that the molecular framework herein provided will facilitate experimental approaches aimed at identifying the regulatory mechanisms underlying Hox expression in Time and Space.
Fundação para a Ciência e a Tecnologia (FCT), Portugal (grants PTDC/SAU-OBD/105111/2008, UMINHO/BI/7/2014 and SFRH/BPD/65652/2009, respectively). RPA was funded by a Ciencia2007 Program Contract and Programa Operacional Regional do Norte (ON.2) – NORTE-07–0124-FEDER-000017. This work was supported by national Portuguese funding through FCT (National and FEDER COMPETE Program funds: PTDC/SAU-BID/121459/2010 and PTDC/SAU-OBD/099758/2008 to RPA and IP, respectively), and by PEst-OE/EQB/LA0023/2011

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac2dbf78303d0b440bdf88d48ae220e4Test
https://hdl.handle.net/1822/62234Test