Community Stories

The figure illustrates schematically a working model of how age-related accumulation of cancer driver mutations occurs with normal aging (purple microglial cells), but can be accelerated in its effects by the inflammatory effects of amyloid and tau proteins in AD, causing mutant microglia to out-compete the normal microglia (blue) for survival. Mutant microglia activate inflammatory and secretory pathways that have been shown to be toxic to non-mutant microglia, as well as to neurons, potentially contributing to neuronal degeneration. Figure taken from Huang et al, (2026).
September 3, 2026
What if every cell in your brain had its own unique genome that permanently records its history, its sibling cells, its age, the effects of disease, and its struggle for survival? How would that change the way we think about aging and degeneration in the brain? Christopher Walsh discusses these questions in light of two new studies from his lab and collaborating groups.
Cross section of the colon showing gut neurons
September 2, 2026
Host-microbe interactions are essential for neurological function. Valentina Lagomarsino shares new research from the Rao Lab showing how microbes play a vital role in regulating the neuroendocrine axis and activity of motor circuits in the colon.
Original article in: Nature Neuroscience >
a cross-section of the brain from a young mouse.
August 10, 2026
Nuria Domínguez-Iturza and Paola Arlotta present new research describing the molecular signals that promote myelination in the cerebral cortex and show that these signals are expressed at varying levels across neuronal types. Their findings reveal how neuronal diversity shapes myelin development, providing new insights into brain development and disease.
Original article in: Developmental Cell >
Starburst model showcasing 13 competency areas
February 24, 2026
How do we prepare early-career scientists for today’s wide range of paths in and beyond the lab? Jelena Patrnogić shares a new flexible competency framework she developed with Xiuqi Li and David Van Vactor that makes expectations clearer for trainees, mentors, and programs, and supports growth across both research and professional skills.
Original article in: PLoS Biology >

In the News

Brain organoids grown in the Arlotta Lab. Image: Carlos Sanchez/Harvard FAS staff photographer
September 15, 2026
The new grant establishes the Human Developmental Neurobiology Hub, to be co-led by Paola Arlotta (Harvard) and Nenad Sestan (Yale). The team — which includes Marinka Zitnik (Harvard Medical School) — will focus on understanding and mapping how the human brain develops at the neural, cellular, genetic, and molecular levels to understand the divergences that occur in children with autism.
Paola Arlotta in her lab
September 15, 2026
In a new milestone for stem cell research, new research from Paola Arlotta and colleagues, co-first authors Irene Faravelli and Noelia Antón-Bolañosa, sets the record for keeping alive lab-grown human brain “organoids” and proven that they mimic key developmental stages seen in living people.
Original article in: Nature >
Postdoctoral fellow Mélina Cordeau, at left, and Associate Professor of Human Evolutionary Biology Erin Hecht hypothesized that dogs’ brains have been shaped by their relationships with humans.
September 15, 2026
A new paper from Erin Hecht, Sophie Barton, and first author Mélina Cordeau recently published in the Journal of Neuroscience, analyzed how human influence, through both selective breeding across evolutionary time and training during individual lifetimes, has shaped the canine brain to make dogs better communicators.
Original article in: Journal of Neuroscience >

Awards & Honors

blue award ribbon illustration
September 15, 2026
Round up of awards and honors earned by the HBI community.
blue award ribbon illustration
August 5, 2026
Round up of awards and honors earned by the HBI community.