Advertisement · 728 × 90

Posts by Chris Petersen

Proud to share this work with @kevinchalut.bsky.social and Byron Mui. Why do some injuries scar while others regenerate? Using digit tip models, we show the ECM is a key driver. HA-rich ECM promotes regeneration, and boosting it can shift healing away from fibrosis. www.science.org/doi/10.1126/...

1 week ago 30 15 3 4
Nobel Laureates and Leading Scientists Endorse Sam Wang for Congress — Sam Wang for New Jersey Nobel laureates and leading scientists across New Jersey’s 12th District endorsed Sam Wang for Congress, warning that attacks on science and research threaten America’s future.

Today, leading scientists & educators from New Jersey's 12th District are endorsing my candidacy! Nobel laureates, as well as pioneers in medicine, physics, AI, and chemistry. I'm deeply grateful. And I'm ready to defend science and the prosperity it brings! www.samfornj.org/news/scienti...

1 month ago 58 19 3 0
Post image

Now this is how you kick off GOTV weekend! Thank you so much to @elizabeth-warren.bsky.social, Jan Schakowsky, and the amazing supporters and volunteers that joined us this morning. 4 days to go, let's win this thing!!

1 month ago 18 9 0 1
Post image

I'm deeply honored to be endorsed by many great Illinois leaders. In Congress, I'll work alongside them to fight for the future we deserve. 3 days left until the primary election!!

1 month ago 16 4 0 1

This is a graph of the death of US science.

1 month ago 365 185 9 5

Whole-body single-cell atlas of an adult vertebrate in homeostasis and regeneration www.biorxiv.org/content/10.64898/2026.02...

2 months ago 11 4 0 1
Post image

News from central Jersey: I'm running to represent New Jersey's 12th Congressional District.

By entering the fray, I hope to bring ideas of repairing our frayed republic. Not only to defend it in 2026, but to build something stronger, for generations to come!

samwang.substack.com/p/entering-t...

2 months ago 531 151 33 34
Post image

Our new paper reveals critical new regulators of stem cell differentiation that control where the right kinds of cells are made in planarians.

In particular, we find Anosmin—a gene responsible for Kallmann Syndrome—as a restrictor of neurogenesis.
www.nature.com/articles/s41...

#basicresearch

2 months ago 24 10 1 0
Video

Happening now: clergy protest ICE detention center in Chicago.

“Why are you still here? Greg Bovino already left.”

“It’s an internment camp…no medicine…toilets don’t work”

5 months ago 1147 529 22 41
I want you to understand what it is like to live in Chicago during this time.

Every day my phone buzzes. It is a neighborhood group: four people were kidnapped at the corner drugstore. A friend a mile away sends a Slack message: she was at the scene when masked men assaulted and abducted two people on the street. A plumber working on my pipes is distraught, and I find out that two of his employees were kidnapped that morning. A week later it happens again.

An email arrives. Agents with guns have chased a teacher into the school where she works. They did not have a warrant. They dragged her away, ignoring her and her colleagues’ pleas to show proof of her documentation. That evening I stand a few feet from the parents of Rayito de Sol and listen to them describe, with anguish, how good Ms. Diana was to their children. What it is like to have strangers with guns traumatize your kids. For a teacher to hide a three-year-old child for fear they might be killed. How their relatives will no longer leave the house. I hear the pain and fury in their voices, and I wonder who will be next.

Understand what it is to pray in Chicago.

I want you to understand what it is like to live in Chicago during this time. Every day my phone buzzes. It is a neighborhood group: four people were kidnapped at the corner drugstore. A friend a mile away sends a Slack message: she was at the scene when masked men assaulted and abducted two people on the street. A plumber working on my pipes is distraught, and I find out that two of his employees were kidnapped that morning. A week later it happens again. An email arrives. Agents with guns have chased a teacher into the school where she works. They did not have a warrant. They dragged her away, ignoring her and her colleagues’ pleas to show proof of her documentation. That evening I stand a few feet from the parents of Rayito de Sol and listen to them describe, with anguish, how good Ms. Diana was to their children. What it is like to have strangers with guns traumatize your kids. For a teacher to hide a three-year-old child for fear they might be killed. How their relatives will no longer leave the house. I hear the pain and fury in their voices, and I wonder who will be next. Understand what it is to pray in Chicago.

“I want you to understand what it is like to live in Chicago during this time.”

aphyr.com/posts/397-i-...

5 months ago 14110 6782 318 384
Advertisement

I'm struck by how many Chicagoans have seemingly felt compelled to write and share reflections on "this is what it feels like in Chicago right now". We know we're going through something awful together and we want the world to understand it.

Threading several of these pieces below.

5 months ago 401 115 8 3
Preview
Donate to Paul Maddox for Congress in NC 11 Paul is running for Congress because there’s a sickness in Washington, and no one is working to cure it.

Dear all, A scientist from UNC Chapel Hill, Paul Maddox, is running for congress in NC for a seat currently held by a republican. If you care about science (and democracy) please consider donating to his campaign #Standupforscience secure.actblue.com/donate/paul-...

6 months ago 74 41 6 8

Update: the White House account on Bluesky @whitehouse-47.bsky.social now has 6.8K followers vs. 550K+ accounts that have blocked it directly or via a blocklist according to ClearSky.

6 months ago 130 39 10 13
Video

Chicago - no kings

6 months ago 32394 7390 8 362

Here it is! Postdoctoral position to identify the progenitors sensory organs in the regenerating legs of Parhyale

apply here: www.averof-lab.org/pages/tracman

1/3

6 months ago 50 35 1 2
One of your future coworkers in the Currie Lab, an adorable axolotl.

One of your future coworkers in the Currie Lab, an adorable axolotl.

💥OUR LAB IS HIRING!!💥

We are hiring a research assistant/lab manager to assist with managing our axolotl colony and enabling some kick-ass science! Looking for high levels of organization, collaboration, problem solving and curiosity.

Application link: tinyurl.com/3tpvphpm
#SciJob #JobAlert

7 months ago 101 38 2 2
Post image

Cells can form patterns within themselves just like embryos do. How? Connie Yan's new preprint shows how the anterior-posterior cytoskeleton pattern in Stentor is dictated by regionalized scaffolding proteins

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

8 months ago 142 35 3 5
Advertisement
Preview
Alert: The Trump administration is quietly slashing new NIH grant awards, and it's not via the budget NIH’s sudden move to multiyear grant funding is forcing shocking cuts in the number of grants funded. This is an effective budget cut. It's bad, folks.

New, from an anonymous NIH insider: Trump is being pushed to spend more NIH money. The White House is ordering NIH to do multi-year budgets for awards. This budget trick means fewer awards, fewer labs funded, and lower paylines for researchers. 🧵
donmoynihan.substack.com/p/alert-the-...

8 months ago 587 320 11 31
Preview
Project 2025 is gutting medical funding that helped Russell Vought's own kid Its architect's daughter has cystic fibrosis—and benefits from a "miracle drug" backed by an agency he's attacking.

Given his performance on @cnn.com, it’s time to tell this story again. Vought’s daughter is alive because of NIH. He’s destroying an institution that saved his daughter’s life. @mrjoncryer.bsky.social @jamellebouie.net @atrupar.com www.motherjones.com/politics/202...

8 months ago 810 437 65 27
Preview
FDA-NIH Workshop: Reducing Animal Testing The FDA is hosting a workshop on reducing animal testing. The workshop is open to current FDA and NIH employees.

The NIH is asking scientists and the public to comment on plans to drastically limit animal model research. If you think animal models remain important tools for basic and clinical research tell them! Click the link below and scroll down to send your comments!

www.fda.gov/news-events/...

9 months ago 59 45 3 5

Happy to announce a new preprint from my lab looking in to the establishment of polycomb domains in early fly development and contributions from pioneer factors Zelda and GAGA-factor.

9 months ago 20 7 0 0
Preview
Opinion | Universities and the government: Which needs the other more? From public health to high-tech innovation, universities are the workhorses of national progress.

Universities are not passive beneficiaries of government largesse. It is the federal government that depends on universities to conduct the research that keeps our nation healthy, safe and economically competitive.I discuss in the Washington Post.
www.washingtonpost.com/opinions/202...

10 months ago 85 42 2 3
Preview
Combinatorial mechanisms specify cellular location and neurotransmitter identity during regeneration of planarian neurons During regenerative neurogenesis, neurons must be created in the right types and locations. Though regenerative neurogenesis is limited in humans, other animals use regenerative neurogenesis to faithf...

A bit of happy news. I'm very excited to share the newest from the R-G lab, a preprint focusing on regenerative neurogenesis in our favorite worms! Grad students @kendallbclay.bsky.social and @taylormlanier.bsky.social co-authored this awesome manuscript. 1/5
www.biorxiv.org/content/10.1...

10 months ago 15 6 2 0
Tracking Overdue Funding – Grant Watch

Possible "shadow termination" of non-competitive grants:

Thanks to Grants-Watch (@anthonybarente.bsky.social + @noamross.net + @scott-delaney.bsky.social), we know of another 1,800+ NIH grants that are more than 30 days overdue for what should be routine renewals...

grant-watch.us/posts/tracki...

10 months ago 50 33 0 1
Advertisement
Breakthrough Prize-Winning Biochemist on the Deadly Cost of Funding Cuts | Amanpour and Company
Breakthrough Prize-Winning Biochemist on the Deadly Cost of Funding Cuts | Amanpour and Company YouTube video by Amanpour and Company

David Liu @harvard.edu beautifully articulates the criticality of basic science funding for developing revolutionary therapeutics like life-saving base editors 👏

youtu.be/8YhJM6zxYDw?...

10 months ago 240 102 1 1

All of NIH funding to Northwestern University is frozen. This pause includes noncompeting approved funding, new and competing grants with fundable scores. No reimbursements for money already spent have been received since March. This situation is rarely reported so please Please get the word out!

10 months ago 2257 1319 34 31
Post image

Delighted that our work on positional memory is now published. We asked how axolotl cells 'know' which part of the limb to regenerate after injury.
www.nature.com/articles/s41...
A joy to work with super team Sarah Plattner, Yuka Sugiura, Francisco Falcon and Elly Tanaka.
🧵1/14

11 months ago 211 66 23 9

More than the freezing of individual grants at Northwestern, I hope it breaks through that all NIH money to Northwestern is stopped even for grants that have not been frozen or terminated. The university has received $0 from NIH since March.

11 months ago 102 63 5 1
Post image

Northwestern has not received any NIH funds since March. No written communication about why or what can be done. Thank you Ben Singer for raising awareness at #ATS2025

11 months ago 1465 601 18 65
Preview
There is no replacement (yet) for animal models in medical research The NIH is “reducing animal use in research.” But there is no replacement for animal models.

It is beyond disturbing when the NIH and HHS Directors do not understand that animal models are essential in research

www.statnews.com/2025/05/19/a...

11 months ago 122 50 1 2