Vaughn Smider, MD, PhD's Avatar

Vaughn Smider, MD, PhD

@vvsmider

Biomedical researcher, antibody investigator (especially cow antibodies ๐Ÿฎ, which are the best), drug discoverer, entrepreneur ๐Ÿ‡บ๐Ÿ‡ธ ๐Ÿ‡บ๐Ÿ‡ฆ Founder and President at Applied Biomedical Science Institute: https://absinstitute.org

2,558
Followers
1,622
Following
554
Posts
25.11.2024
Joined
Posts Following

Latest posts by Vaughn Smider, MD, PhD @vvsmider

In some of my early grants I made the mistake of trying to put too much in (regardless of legibility) maxing out how much text and data the page limits could fit. Now I only show data if it is essential and use more generous line spacing. I'd rather my proposal be the easier one to read in the pile

10.03.2026 00:10 ๐Ÿ‘ 12 ๐Ÿ” 1 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0
A phylogenetic tree of insects is shown annotating the presence or absence of a an antimicrobial peptide gene across winged insects

A phylogenetic tree of insects is shown annotating the presence or absence of a an antimicrobial peptide gene across winged insects

Various phylogenetic secondary loss events are mapped to a tree of insects to explain the parsimony calculations necessary to explain the diversity of insect Drosomycin antimicrobial peptide genes

Various phylogenetic secondary loss events are mapped to a tree of insects to explain the parsimony calculations necessary to explain the diversity of insect Drosomycin antimicrobial peptide genes

Antimicrobial peptides (AMPs) are key defence molecules of the innate immune system of plants and animals. Understanding the evolutionary origins of AMPs can help to explain how immune systems acquire novelty and vary in their defensive capabilities. However, AMPs evolve rapidly, and so the origins of similar AMPs across organisms is often unclear. Furthermore, false negatives due to low search sensitivity are common and can hinder confident annotations about true absences. Due to these difficulties, understanding whether similar AMP genes found in diverse organisms represent ancestral molecules or evolutionary novelties has been challenging. In this report, we present evidence of
horizontal gene transfer (HGT) of the antifungal peptide gene Drosomycin across insects. We show that in Diptera, the presence of Drosomycin is restricted to the Melanogaster group and additionally the
distant relative Drosophila busckii. We go on to recover Drosomycin genes in cockroaches (Blattodea), mantises (Mantodea), one katydid (Orthoptera), various beetles (Coleoptera), and a recently acquired
pseudogenized Drosomycin locus in Liposcelis booklice (Psocodea), but no other insects. Explaining this diversity through shared ancestry requires at least 50 independent loss events, or just seven HGT
events. Previous studies have suggested that similar AMPs found across divergent species reflect conservation from a common ancestor, or due to their small size, that they arose via convergent evolution resulting from pathogen-imposed selection. Our findings suggest horizontal gene transfer can be responsible for the presence of some AMP genes found scattered across the tree of life. By presenting a mechanism through which immune systems can acquire novelty, our study also suggests a possible explanation for certain lineage-specific competencies for defence against infectious disease. While loss of AMP genes is common in certain lineages, here we suggest gain of AMPs can occur just as suddenly.

Antimicrobial peptides (AMPs) are key defence molecules of the innate immune system of plants and animals. Understanding the evolutionary origins of AMPs can help to explain how immune systems acquire novelty and vary in their defensive capabilities. However, AMPs evolve rapidly, and so the origins of similar AMPs across organisms is often unclear. Furthermore, false negatives due to low search sensitivity are common and can hinder confident annotations about true absences. Due to these difficulties, understanding whether similar AMP genes found in diverse organisms represent ancestral molecules or evolutionary novelties has been challenging. In this report, we present evidence of horizontal gene transfer (HGT) of the antifungal peptide gene Drosomycin across insects. We show that in Diptera, the presence of Drosomycin is restricted to the Melanogaster group and additionally the distant relative Drosophila busckii. We go on to recover Drosomycin genes in cockroaches (Blattodea), mantises (Mantodea), one katydid (Orthoptera), various beetles (Coleoptera), and a recently acquired pseudogenized Drosomycin locus in Liposcelis booklice (Psocodea), but no other insects. Explaining this diversity through shared ancestry requires at least 50 independent loss events, or just seven HGT events. Previous studies have suggested that similar AMPs found across divergent species reflect conservation from a common ancestor, or due to their small size, that they arose via convergent evolution resulting from pathogen-imposed selection. Our findings suggest horizontal gene transfer can be responsible for the presence of some AMP genes found scattered across the tree of life. By presenting a mechanism through which immune systems can acquire novelty, our study also suggests a possible explanation for certain lineage-specific competencies for defence against infectious disease. While loss of AMP genes is common in certain lineages, here we suggest gain of AMPs can occur just as suddenly.

Pleased to finally share this fun collab that began at #Ento23

@cedricaumont.bsky.social presented & I had seen NCBI annotated some cockroach genomes as "contaminated." Turns out NCBI & I were wrong (much more fun).

Horizontal transfer of an #AntimicrobialPeptide across insects
bit.ly/DrsHGT

1/๐Ÿงต

06.03.2026 08:22 ๐Ÿ‘ 63 ๐Ÿ” 26 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 2

How long would it take you to spend $5.6 billion? Could you spend $1 million per year? $10 million? $100 million? On what?

10.03.2026 03:17 ๐Ÿ‘ 17 ๐Ÿ” 2 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0

You could get one or two drugs approved for this much $โ€ฆbut not in a few days.

10.03.2026 04:34 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Preview
This is another case where science is being โ€œpresidentialized.โ€ Congress, the most democratic branch, should be making decisions about whether to close down NCAR. Not the president. If anyโ€ฆ | Mar... This is another case where science is being โ€œpresidentialized.โ€ Congress, the most democratic branch, should be making decisions about whether to close down NCAR. Not the president. If any presid...

More on science presidential power grabs - seen at #NSF with #NCAR today.

1/4 ๐Ÿงช

www.linkedin.com/posts/markhi...

09.03.2026 21:31 ๐Ÿ‘ 30 ๐Ÿ” 14 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Preview
How Congress can restore the independence of US science Members must go beyond reinstating US government research spending and re-establish decentralized governance at the National Institutes of Health and other agencies.

Congress must go beyond reinstating US government research spending and re-establish decentralized governance at the NIH and other agencies, says sociologist Natalie B. Aviles.

go.nature.com/4bCwTNh

09.03.2026 17:31 ๐Ÿ‘ 46 ๐Ÿ” 18 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 3
Preview
a cartoon says hey everybody an old man 's talking while bart simpson looks on ALT: a cartoon says hey everybody an old man 's talking while bart simpson looks on

A short Bluetorial on plots of NIH application success rates as a function of percentile.

1/20

09.03.2026 14:56 ๐Ÿ‘ 112 ๐Ÿ” 52 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 4

Assume $1-3B per drug, attrition of drugs is significant so only a small % get approved. This is a massive upfront cost. Where would this $ come from w an NIH budget of <$50?I doubt the math is even close to feasible. (thatโ€™s assuming patents are really the problem, which is debatable).

09.03.2026 03:05 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

The cost to develop a new drug to approval is well >$1B, and takes many many years. The current NIH budget is <$50B. So this idea seems pretty impractical in terms of changing the โ€œsystemโ€.

09.03.2026 01:04 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

what will the curve look like for FY2026? we know that total $$ and MYF fraction are roughly the same as in 2025. However CSR moved the triage line (% of apps discussed and scored at study section) to 1/3 instead of 1/2. This will likely shift the 2026 curve upward, particularly at the left end.

08.03.2026 15:57 ๐Ÿ‘ 10 ๐Ÿ” 5 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0
Preview
โ€˜How is he going to have the time?โ€™ NIH staff voice concern as Bhattacharya takes on CDC role Scientists fear NIH director will be even more absent and leave key issues unresolved as he takes interim CDC lead

Great new piece by @melodyschreiber.com in The Guardian about NIH/CDC Director Bhattacharya .

In it, I talk about asking Bhattacharya in January about a recent issue affecting the affordability of healthcare for thousands of early career researchers on the NIH campuses.

08.03.2026 15:02 ๐Ÿ‘ 63 ๐Ÿ” 35 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 6
Preview
Her work paved the way for blockbuster obesity drugs. Now, sheโ€™s fighting for recognition Svetlana Mojsov helped discover the hormone GLP-1. Why has she been excluded from its history?

Svetlana Mojsovโ€™s research paved the way for Ozempic, but she had to fight for her seat at the table. The Matilda Effect strikes again! ๐Ÿ˜ค

This #WomensHistoryMonth, we begin by honoring the chemist who identified the active GLP-1 hormone.

Itโ€™s high time we credit the women who change the world. ๐Ÿงชโœจ

06.03.2026 03:32 ๐Ÿ‘ 271 ๐Ÿ” 66 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 1

And the science really isnโ€™t โ€œintriguingโ€ at allโ€ฆ

05.03.2026 18:03 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

This happens in science all the time- a little nugget of interesting data, filed away, that can re-emerge later in another context.

05.03.2026 18:02 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

โ€œit is time, finally and forever, to get rid of for-profit scientific publishers.โ€

04.03.2026 08:00 ๐Ÿ‘ 2 ๐Ÿ” 3 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Preview
Do America's Top Health Research Officials Stick Around Too Long? Critics argue that NIH directors should have term limits. Others say leadership continuity matters. Who's right?

Interesting story (and beautiful graphic) from Undark about how long NIH institute directors stay (and should stay) in their positions.

undark.org/2026/03/04/t...

04.03.2026 21:19 ๐Ÿ‘ 17 ๐Ÿ” 5 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

โ€œit is time, finally and forever, to get rid of for-profit scientific publishers.โ€

04.03.2026 08:00 ๐Ÿ‘ 2 ๐Ÿ” 3 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
An announcement that the Senate voted to reauthroize the SBIR/STTR program.

An announcement that the Senate voted to reauthroize the SBIR/STTR program.

The Senate has (finally) voted to reauthorize the small business SBIR/STTR program.

Not reauthorized yet, but this was likely the biggest hurdle.

04.03.2026 01:55 ๐Ÿ‘ 96 ๐Ÿ” 27 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
Preview
Meet three scientists who said no to Epstein The warning signs included a web search, a motherโ€™s doubts, and inklings of a โ€œsexist attitudeโ€

This is a nice contrast to all the awful behavior confirmed through the Epstein files. Proud of @jenlucpiquant.bsky.social & @seanmcarroll.bsky.social for picking up on the sexism & charlatanism right away.

03.03.2026 15:29 ๐Ÿ‘ 444 ๐Ÿ” 145 ๐Ÿ’ฌ 8 ๐Ÿ“Œ 16
Preview
Ivermectin is making a post-pandemic comeback, among cancer patients The anti-parasitic drug became a household name during the COVID-19 pandemic, and it is now being embraced as an alternative treatment for cancer. It is as politically polarizing as ever.

The mass psychosis over Ivermectin as a "cure all" miracle drug did not end w COVID. It's being embraced as a cure for cancer in right wing circles.
If you have scabies or a parasitic worm infection it ivermectin helps.
It is NOT effective chemotherapy for any cancer!
www.npr.org/2026/03/02/n...

03.03.2026 21:07 ๐Ÿ‘ 75 ๐Ÿ” 14 ๐Ÿ’ฌ 14 ๐Ÿ“Œ 3

Just had a meeting with another colleague who is leaving the United States for Canada because of the political and science climate here.

This is just devastating for science in America, but I totally understand.

02.03.2026 20:55 ๐Ÿ‘ 23 ๐Ÿ” 4 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Some shit is about to go down with NIH study sections, friends. Keep your eyes peeled for change that may affect your grant submissions.

03.03.2026 02:30 ๐Ÿ‘ 80 ๐Ÿ” 39 ๐Ÿ’ฌ 7 ๐Ÿ“Œ 7

bsky.app/profile/tiva...

03.03.2026 01:49 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Science and Engineering is the basis of modern civilization, but particularly those studies into fundamental things. It is a foundational building block from which most wealth eventually derives. When we sacrifice it, we sacrifice much of our future.

01.03.2026 19:47 ๐Ÿ‘ 6 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Preview
Ultra-sensitive CAR T cells eliminate hard-to-treat tumours in mice Nature - A proof-of-concept study opens up an avenue for treating solid tumours that express low levels of a target antigen.

Ultra-sensitive CAR T cells eliminate hard-to-treat tumours in mice

A proof-of-concept study opens up an avenue for treating solid tumours that express low levels of a target antigen.

www.nature.com/artic...
1/3

01.03.2026 21:39 ๐Ÿ‘ 28 ๐Ÿ” 10 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Given that clonal biofilms of single bacterial species rapidly diversify into niche specialists, how do biofilms of multiple species evolve?
A ๐Ÿงต featuring new collaborative pubs:
1. www.biorxiv.org/content/10.6...
2. www.nature.com/articles/s41...

01.03.2026 18:53 ๐Ÿ‘ 47 ๐Ÿ” 19 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Ohh.... #biology #lego

01.03.2026 17:57 ๐Ÿ‘ 125 ๐Ÿ” 40 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 2
Post image

That's right. Worse than Pointless
www.nytimes.com/2026/02/23/o...

01.03.2026 15:32 ๐Ÿ‘ 1540 ๐Ÿ” 438 ๐Ÿ’ฌ 40 ๐Ÿ“Œ 22

So Iโ€™d imagine that Iโ€™m not the only one looking into switching my (low level) paid account from open.ai to Anthropic. Any thoughts about which performs better for your average academic scientist?

28.02.2026 20:23 ๐Ÿ‘ 5 ๐Ÿ” 1 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

Every now and then I read a paper that opens my eyes to see an aspect of biology in a new way. This paper blew my mind - TLR7/8 have agonist sites to bind viral RNA, and antagonist sites to bind endogenous RNA degrad. products, enabling self/nonself discrimination: www.nature.com/articles/s41...

28.02.2026 20:48 ๐Ÿ‘ 5 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1