Edward M. De Robertis

Last updated
Edward M. De Robertis
Edward M. De Robertis.jpg
Born(1947-06-06)June 6, 1947
Alma mater
Known forDorsal-Ventral patterning, Evo-Devo, Xenopus
Scientific career
Fields embryology
Institutions
Doctoral advisor John Gurdon
Website https://www.hhmi.ucla.edu/derobertis/

Edward Michael De Robertis (born June 6, 1947) is an American embryologist and Professor at the University of California, Los Angeles. [1] [2] His work has contributed to the finding of conserved molecular processes of embryonic inductions that result in tissue differentiations during animal development. [3] He was elected to the National Academy of Sciences in 2013, worked for the Howard Hughes Medical Institute for 26 years, and holds a Distinguished Professor at the University of California, Los Angeles. [4] [5] In 2009 Pope Benedict XVI appointed De Robertis to a lifetime position in the Pontifical Academy of Sciences, and in 2022 Pope Francis appointed him Councillor of the Academy for four years. [6] [7]

Contents

Early life and education

Edward De Robertis was born on June 6, 1947, in Cambridge, Massachusetts, while his father, neurobiologist Eduardo Diego De Robertis, was an MIT postdoctoral fellow. From the age of three, he was reared in Uruguay, where he received his medical degree at age 24 from the Universidad de la República del Uruguay. This was followed by the completion of a Ph.D. in chemistry at the Leloir Institute in Buenos Aires, Argentina. [8] [9]

Career and research

De Robertis' postdoctoral training (1974-1977) was with Nobel laureate Sir John Gurdon at the Medical Research Council in Cambridge England.

In 1984, De Robertis together with his late colleague Walter Gehring's and their laboratories cloned the first vertebrate development-controlling gene, today known as Hox-C6. [10] [11] [12] [13] [14] [15] Hox genes are responsible for anterior-to-posterior (head-to-tail) differentiation. The finding that Hox genes are conserved in both vertebrates and fruit flies heralded the beginning of the nascent scientific field of Evolution and Development, or Evo-Devo. [16] [17] [18]

In the 1990s, the laboratory of De Robertis dissected systematically the molecular pathways that mediate embryonic induction. [19] [20] Hans Spemann and Hilde Mangold discovered in 1924 an area of the amphibian embryo that, when transplanted, might promote the creation of Siamese twins. [21] De Robertis identified the genes expressed in Xenopus embryos in this area, beginning with the goosecoid homeobox gene. [22] [23]

Together with his colleagues, he discovered Chordin, a protein secreted by dorsal cells that binds Bone Morphogenetic Protein (BMP) growth factors, facilitating their transport to the ventral side of the embryo, where Chordin is digested by a protease called Tolloid, allowing BMPs to signal once more. [24] [25] [26] [27] In most bilateral species, such as fruit flies, spiders, early chordates, and mammals, this flow of growth factors dictates dorsal (back) to ventral (belly) cell and tissue differentiation. The Chordin/BMP/Tolloid biochemical pathway is cross-regulated by interactions with other signalling pathways such as Wnt. [28] His lab has recently established a link between the canonical Wnt pathway, macropinocytosis, multivesicular endosomes, lysosomes, and protein degradation. [29] [30] [31]

He has also served for over two decades on the scientific board of the Pew Charitable Trusts Latin American Fellows programme.[ citation needed ]

Honors and awards

Publications

Related Research Articles

<span class="mw-page-title-main">Homeobox</span> DNA pattern affecting anatomy development

A homeobox is a DNA sequence, around 180 base pairs long, that regulates large-scale anatomical features in the early stages of embryonic development. For instance, mutations in a homeobox may change large-scale anatomical features of the full-grown organism.

<span class="mw-page-title-main">Gastrulation</span> Stage in embryonic development in which germ layers form

Gastrulation is the stage in the early embryonic development of most animals, during which the blastula, or in mammals the blastocyst is reorganized into a multilayered structure known as the gastrula. Before gastrulation, the embryo is a continuous epithelial sheet of cells; by the end of gastrulation, the embryo has begun differentiation to establish distinct cell lineages, set up the basic axes of the body, and internalized one or more cell types including the prospective gut.

<span class="mw-page-title-main">Robert G. Roeder</span>

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Chordin is a protein with a prominent role in dorsal–ventral patterning during early embryonic development. In humans it is encoded for by the CHRD gene.

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<span class="mw-page-title-main">Cerberus (protein)</span> Protein-coding gene in the species Homo sapiens

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<span class="mw-page-title-main">PBX1</span> Protein found in humans

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<span class="mw-page-title-main">HOXB5</span> Protein-coding gene in humans

Homeobox protein Hox-B5 is a protein that in humans is encoded by the HOXB5 gene.

<span class="mw-page-title-main">HOXC13</span> Protein-coding gene in the species Homo sapiens

Homeobox protein Hox-C13 is a protein that in humans is encoded by the HOXC13 gene.

<span class="mw-page-title-main">Homeobox protein goosecoid</span> Protein-coding gene in the species Homo sapiens

Homeobox protein goosecoid(GSC) is a homeobox protein that is encoded in humans by the GSC gene. Like other homeobox proteins, goosecoid functions as a transcription factor involved in morphogenesis. In Xenopus, GSC is thought to play a crucial role in the phenomenon of the Spemann-Mangold organizer. Through lineage tracing and timelapse microscopy, the effects of GSC on neighboring cell fates could be observed. In an experiment that injected cells with GSC and observed the effects of uninjected cells, GSC recruited neighboring uninjected cells in the dorsal blastopore lip of the Xenopus gastrula to form a twinned dorsal axis, suggesting that the goosecoid protein plays a role in the regulation and migration of cells during gastrulation.

<span class="mw-page-title-main">HOXA2</span> Protein-coding gene in the species Homo sapiens

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The Spemann-Mangold organizer is a group of cells that are responsible for the induction of the neural tissues during development in amphibian embryos. First described in 1924 by Hans Spemann and Hilde Mangold, the introduction of the organizer provided evidence that the fate of cells can be influenced by factors from other cell populations. This discovery significantly impacted the world of developmental biology and fundamentally changed the understanding of early development.

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References

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