David Ledbetter is chief clinical officer of Dascena, a personalized medicine company.
David Ledbetter
Chief clinical officer
Dascena
From this contributor
There are no autism-specific genes, just brain genes
There is not yet a single example of a gene that, when mutated, increases the likelihood of autism but not of other neurodevelopmental conditions, including intellectual disability.
There are no autism-specific genes, just brain genes
By
David Ledbetter, Scott Myers
23 March 2021 | 5 min read
Developmental disorders should be viewed as continuum
Intellectual disability, autism, epilepsy and schizophrenia should be considered part of a spectrum of developmental brain dysfunction, says David Ledbetter.
Developmental disorders should be viewed as continuum
By
David Ledbetter
6 May 2013 | 3 min read
Explore more from The Transmitter
The genome offers a recipe, not a blueprint, for the brain
During brain development, genes set the rules and turn the knobs; self-organization does much of the rest.
The genome offers a recipe, not a blueprint, for the brain
During brain development, genes set the rules and turn the knobs; self-organization does much of the rest.
By
Ila Fiete
2 November 2026 | 8 min read
Autism research involving monkeys contends with uphill battle
Macaques and marmosets recapitulate the condition’s core traits better than mice can, but funding uncertainty and challenges at primate centers in the United States could make this work difficult to continue.
Autism research involving monkeys contends with uphill battle
Macaques and marmosets recapitulate the condition’s core traits better than mice can, but funding uncertainty and challenges at primate centers in the United States could make this work difficult to continue.
By
Diana Kwon
2 November 2026 | 8 min read
When is self-organization a mechanism in brain development?
Retinal waves offer a powerful example of a self-organizing system that can build structure without external guidance. The field would do well to embrace such phenomena more broadly as a type of mechanistic explanation.
When is self-organization a mechanism in brain development?
Retinal waves offer a powerful example of a self-organizing system that can build structure without external guidance. The field would do well to embrace such phenomena more broadly as a type of mechanistic explanation.
By
P. Robin Hiesinger
2 November 2026 | 6 min read