Via EurekAlert, more details on the role of Wnt signaling in the regeneration of complex organs in zebrafish: regeneration ''involves creating cells that can take any number of new roles. This can be done by re-programming cells that already have a given function or by activating resident stem cells ... a particular kind of cell-to-cell ...

A number of researchers seek to bring the regenerative prowess of some lower animals into the realm of human medicine. Zebra fish are one candidate, if we can just understand how they do it. Scientific American reports that zebra fish ''regenerate heart muscle in two synchronized steps. Within five days of removing about 20 percent of an adult ...

From PLoS Biology, research into the regenerative capabilities of zebrafish: ''Injured mammalian hearts cannot regenerate; instead, they scar. ... By contrast with mammals, newt and zebrafish hearts regenerate after amputation. The molecular mechanisms underlying this phenomenon have not been characterized in newts because of a lack of genetic ...