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Scaling of morphogen gradients by an expansion-repression integral feedback control.

Abstract：

:Despite substantial size variations, proportions of the developing body plan are maintained with a remarkable precision. Little is known about the mechanisms that ensure this adaptation (scaling) of pattern with size. Most models of patterning by morphogen gradients do not support scaling. In contrast, we show that scaling arises naturally in a general feedback topology, in which the range of the morphogen gradient increases with the abundance of some diffusible molecule, whose production, in turn, is repressed by morphogen signaling. We term this mechanism "expansion-repression" and show that it can function within a wide range of biological scenarios. The expansion-repression scaling mechanism is analogous to an integral-feedback controller, a key concept in engineering that is likely to be instrumental also in maintaining biological homeostasis.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Ben-Zvi D,Barkai N

doi

10.1073/pnas.0912734107

subject

Has Abstract

pub_date

2010-04-13 00:00:00

pages

6924-9

issue

15

eissn

0027-8424

issn

1091-6490

pii

0912734107

journal_volume

107

pub_type

杂志文章

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