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Posts by David L. Stern

Since moving to @stowersinstitute.bsky.social, we are now 100% focused hemipteran effectors. We have many opportunities in the lab: computational, volume EM, live imaging (multiple scales), field work, cell biology, biochemistry, etc. Interested? Reach out! Will consider any career stage.

2 weeks ago 3 2 0 0

This work led by Fatema Bhinderwala in Gronenborn lab and Aishwarya Korgaonkar in mine!

2 weeks ago 1 0 1 0

New paper from the Stern and Gronenborn labs on structure and evolution of aphid bicycle effector proteins.
We show how alphafold can generate accurate predictions for these rapidly evolving proteins and that these proteins are diverse in every possible way.

www.biorxiv.org/content/10.6...

2 weeks ago 16 9 1 0
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A new Science Magazine commentary highlights #research from the Halfmann Lab exploring how immune signaling proteins act like a “phase-change battery,” storing energy until cells need to respond. 🔋

Read here: bit.ly/4rUEOv9

3 weeks ago 2 2 0 1

Junk RNA

4 weeks ago 17 8 0 1
Interallelic cis-regulatory dominance promotes robustness and evolutionary innovation Dominance is a central principle of genetics, yet the mechanistic basis and the evolutionary consequences of dominance arising from cis-regulatory variation remain poorly understood. We examined the evolutionary trajectories of a pleiotropic developmental enhancer in Drosophila . A genotype–phenotype map between D. melanogaster and D. simulans enhancer sequences reveals extensive epistasis, and many homozygous evolutionary paths reduce transcriptional output. In heterozygotes, however, regulatory dominance masks variants that reduce gene expression, potentially relaxing evolutionary constraints. Using allele-specific reporters and imaging, we show that this dominance arises from interallelic interactions (also known as transvection) reinforced by transcriptional hubs. Importantly, this enhancer dominance is cell-type specific, raising the possibility that it conceals deleterious effects in essential tissues while revealing novel, ectopic activity in others. Interallelic regulatory hubs may therefore expand the range of mutational paths available to diploid genomes while preserving essential transcriptional output. ### Competing Interest Statement The authors have declared no competing interest.

New Preprint! When one enhancer allele changes another's regulatory output, is that bad? We found it could be a feature — interallelic cis-regulatory dominance buffers outputs AND enables evolutionary innovation. Two for one!

Led by @ottilie.bsky.social from @embl.org

doi: doi.org/10.64898/202...

1 month ago 40 13 2 0
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Tiny brains. Big ideas. 🐝

Join us April 15 for #BIGIDEAS: The Minds of Insects at the Institute—an evening exploring how insects think, learn, and shape the world around us with @larschittka.bsky.social and @gallseeker.bsky.social.

🎟️ Registration is now open: bit.ly/4aFHJ5A

2 months ago 2 1 0 1
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Remember her name: Aliya Rahman

Her testimony is everything and it deserves to be heard, by everyone. Decide for yourself.

It’s powerful. It’s gut-wrenching. And no one should have to survive what she did.

ICE MUST GO‼️

2 months ago 25651 12002 1001 1099

The invasive soybean pest Helicoverpa armigera has acquired resistance to Bt toxins from native H. zea in Brazil. We showing this in a time series of genome data from nearly 1000 individuals over 10 years, plus a lab strain experiment that verified the function

3 months ago 6 1 1 0
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The collision of two genomes threatens global food security Human activity alters selection pressures and species' ranges, creating opportunities for hybridisation through secondary contact. Ancient hybridization has enabled adaptive radiation, but its role in...

Excited about our new preprint showing bidirectional adaptive introgression between invasive and native crop pests over ecological timescales www.biorxiv.org/content/10.6...

3 months ago 67 18 1 4
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Fantastic!

5 months ago 0 0 0 0
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How has this pun never occurred to me?

6 months ago 276 38 19 4

Watch the video.
Classroom learning has approximately nothing to do with being a scientist.
I fondly recall John sitting in the front row of seminars, shielding his eyes from the Powerpoint garbage so that he could listen intently to the spoken words. A true inspiration.

6 months ago 2 0 0 0
Until It's Done: Sylvia Rivera
Until It's Done: Sylvia Rivera YouTube video by Zohran Mamdani for NYC

Mamdani talking lucidly and passionately about trans rights and history in a video that should frankly shame every politician who has hemmed and hawed and triangulated and said, "Well, but sports..." It's not that hard to tell the truth and stand for what's right. www.youtube.com/watch?v=bEvV...

6 months ago 3960 1092 26 67
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Why would a healthy cell decide to die? Investigator Randal Halfmann joined @npr.org's "All Things Considered" to discuss his #research on how and why cells decide to self-destruct—a process known as programmed cell death. #SciSky

🎧 Listen here: n.pr/3L4i1gF

6 months ago 5 1 0 0
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A Song of Ice and Fire | Eric Kurlander World Ice Theory and the supernatural imaginary of the Third Reich.

In the history of authoritarian regimes promoting pseudoscience for ideological reasons, one that I just learned about: "World Ice Theory" and the Nazis.

www.laphamsquarterly.org/roundtable/s...

6 months ago 7 1 0 0
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John Gurdon (1933 – 2025) - MRC Laboratory of Molecular Biology Renowned developmental biologist John Gurdon, former Group Leader and Head of the LMB’s Cell Biology Division, has died aged 92.

Very sad to learn of the death of Sir John Gurdon. He made a huge contribution to developmental biology & should be an inspiration to anyone whose potential is dismissed in school. It was a pleasure to work with him when he was Chair of the COB Board. www2.mrc-lmb.cam.ac.uk/john-gurdon-...

6 months ago 30 5 0 1
Figure from the preprint showing sensory neuron morphology with different levels of Cas9 expression.

Figure from the preprint showing sensory neuron morphology with different levels of Cas9 expression.

High levels of Cas9 are toxic in sensory neurons. Reducing Cas9 levels with uORFs avoids toxicity and is compatible with efficient editing. From @thompsonpeerlab.bsky.social. Fly lines @vdrc-flies.bsky.social

#CRISPR #Drosophila

www.biorxiv.org/content/10.1...

6 months ago 20 11 0 0
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“Terrible things are happening outside. Poor helpless people are being dragged out of their homes. Families are torn apart. Men, women, and children are separated. Children come home from school to find that their parents have disappeared.”

Diary of Anne Frank
January 13, 1943

6 months ago 17056 7971 256 336
FlyBase Update – October 2025
The termination of the NIH/NHGRI FlyBase grant has placed the long-term sustainability of FlyBase at risk. However, thanks to the generous support of several key individuals and institutions, we are pleased to announce that FlyBase will remain operational through the coming year. We extend our deepest gratitude to Yukiko Yamashita, Cassandra Extavour, Hugo Bellen, Thom Kaufman, the Genetics Society of America / Drosophila Board, the Bloomington Drosophila Stock Center, an anonymous donor and the Wellcome Trust. We are especially thankful for a generous gift from Seemay Chou, Jed McCaleb, and The Navigation Fund. We also greatly appreciate the continued support from the broader Drosophila community – your donations and service fees have been vital in helping us stay afloat. Special thanks also go to Jessica Manning for her tireless administrative work at Harvard, to Ruth Lehmann, Hugo Bellen, and Paul Sternberg for advice and efforts, and to the Board of the European Drosophila Society for all their efforts. Sadly, we must also share that several long-standing FlyBase team members have recently moved on. We are immensely grateful to Susan Russo-Gelbart, Lynn Crosby, Gil dos Santos, Kris Broll, Victoria Jenkins, and TyAnna Lovato for their many years of dedicated service and contributions to FlyBase. Looking ahead, ensuring FlyBase’s sustainability beyond the next year – and successfully integrating with the Alliance – will require new funding sources. We kindly ask for your continued support:
	•	European labs: Please consider contributing to the Cambridge, U.K. FlyBase group
	•	U.S. and other non-European labs: Please consider contributing to the U.S. FlyBase groups
	•	Both U.K. and U.S. FlyBase are working diligently to establish an invoicing system. We appreciate your continued patience.
For more information on how to support us, please visit: Contribute to FlyBase wiki page https://wiki.flybase.org/wiki/FlyBase:Contribute_to_FlyBase

FlyBase Update – October 2025 The termination of the NIH/NHGRI FlyBase grant has placed the long-term sustainability of FlyBase at risk. However, thanks to the generous support of several key individuals and institutions, we are pleased to announce that FlyBase will remain operational through the coming year. We extend our deepest gratitude to Yukiko Yamashita, Cassandra Extavour, Hugo Bellen, Thom Kaufman, the Genetics Society of America / Drosophila Board, the Bloomington Drosophila Stock Center, an anonymous donor and the Wellcome Trust. We are especially thankful for a generous gift from Seemay Chou, Jed McCaleb, and The Navigation Fund. We also greatly appreciate the continued support from the broader Drosophila community – your donations and service fees have been vital in helping us stay afloat. Special thanks also go to Jessica Manning for her tireless administrative work at Harvard, to Ruth Lehmann, Hugo Bellen, and Paul Sternberg for advice and efforts, and to the Board of the European Drosophila Society for all their efforts. Sadly, we must also share that several long-standing FlyBase team members have recently moved on. We are immensely grateful to Susan Russo-Gelbart, Lynn Crosby, Gil dos Santos, Kris Broll, Victoria Jenkins, and TyAnna Lovato for their many years of dedicated service and contributions to FlyBase. Looking ahead, ensuring FlyBase’s sustainability beyond the next year – and successfully integrating with the Alliance – will require new funding sources. We kindly ask for your continued support: • European labs: Please consider contributing to the Cambridge, U.K. FlyBase group • U.S. and other non-European labs: Please consider contributing to the U.S. FlyBase groups • Both U.K. and U.S. FlyBase are working diligently to establish an invoicing system. We appreciate your continued patience. For more information on how to support us, please visit: Contribute to FlyBase wiki page https://wiki.flybase.org/wiki/FlyBase:Contribute_to_FlyBase

There's an update on the state of FlyBase on the FlyBase.org front page. You can contribute to FlyBase at this link wiki.flybase.org/wiki/FlyBase...
We express enormous gratitude to the people, labs, groups, and foundations who have already helped us.
#FlyBase #Drosophila

6 months ago 46 41 1 1
Agrawal lab logo. A fly in the UBC colors, with dots framing its body.

Agrawal lab logo. A fly in the UBC colors, with dots framing its body.

The Agrawal lab is moving! This January we will be setting up shop at #UBC in Vancouver, in the department of #Zoology! We are actively recruiting at all levels, especially masters and PhD students. These position are #funded! Please send anyone interested my way!

6 months ago 113 45 16 4

Haha. Part of the lab will be working to shorten their lives. But, yeah!

6 months ago 0 0 0 0

Thanks Arnaud. Sorry to be leaving the DMV, but onward, upward, and westward.

6 months ago 1 0 0 0

Thanks Fillip!

6 months ago 0 0 0 0

Thanks James. Much closer to Utah...

6 months ago 2 0 0 0
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Thanks Alicia! Very exciting opportunity!

6 months ago 0 0 0 0
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(Part 1) Hear from @hhmi_news Investigator David Stern about his research program and what he's uncovering in the lab.

Stern will join the Institute in February 2026, bringing his lab and HHMI appointment to Kansas City. @hhmi.org

Read more: bit.ly/4np96Fb

6 months ago 14 7 0 0
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(Part 2)

“From my first visit, I was struck by the energy and excitement...It feels like being a graduate student again, chasing curiosity wherever it leads."

@hhmi.org Investigator David Stern will join the Stowers Institute in Feb. 2026 from @hhmijanelia.bsky.social.

Read more: bit.ly/4np96Fb

6 months ago 6 5 0 0

It's official! We are moving to Stowers!
Very exciting opportunity to expand our studies of insect-plant interactions. We have many opportunities available in biochemistry, development, behavior, genetics, evolution, genomics, AI, and even pest control. Interested in any of these things? Reach out!

6 months ago 72 18 12 0
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I get that the news cycle is packed right now, but I just heard from a colleague at the Smithsonian that this is fully a GIANT SQUID BEING EATEN BY A SPERM WHALE and it’s possibly the first ever confirmed video according to a friend at NOAA

10 YEAR OLD ME IS LOSING HER MIND (a thread 🧵)

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