Before Reading The Caption I Had Assumed This Was Some Sort Of Histology Art Exhibit.

Before reading the caption I had assumed this was some sort of histology art exhibit.

Biologists Induce Flatworms to Grow Heads and Brains of Other Species

Biologists at Tufts University have succeeded in inducing one species of flatworm to grow heads and brains characteristic of another species of flatworm without altering genomic sequence. The work reveals physiological circuits as a new kind of epigenetics - information existing outside of genomic sequence - that determines large-scale anatomy.  

The finding that head shape is not hard-wired by the genome but can be overridden by manipulating electrical synapses in the body suggests that differences in species could be determined in part by the activity of bioelectrical networks. The discovery could help improve understanding of birth defects and regeneration by revealing a new pathway for controlling complex pattern formation. It has long been known that neural networks exploit bioelectric synapses to store and re-write information in the brain.

The findings are detailed in the cover story of the November 2015 edition of the International Journal of Molecular Sciences, appearing online Nov. 24.

Tufts biologists induced one species of flatworm – G. dorotocephala, top left – to grow heads and brains characteristic of other species of flatworm, top row, without altering genomic sequence. Examples of the outcomes can be seen in the bottom row of the image.  Center for Regenerative and Developmental Biology, School of Arts and Sciences, Tufts University.

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