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Ben Samelson-Jones, MD, PhD

@samelsonjones.bsky.social
781 followers 551 following 126 posts

Pediatric Hematologist 🧪🩸| Gene Therapist | Biochemist | 👩‍🦱👨👩👦🐕 Dad | Husband | Williams Syndrome Advocate #Medsky #Hemesky

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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 22/09/2026
As #hemophilia treatments become more sophisticated, understanding the role of the dysfunctional F9 variant becomes more important: Factor IX gene variants may influence the pharmacokinetic profile of patients with hemophilia B treated www.jthjournal.org/article/S153...
jthjournal.org
Factor IX gene variants may influence the pharmacokinetic profile of patients with hemophilia B treated with Factor IX-fusion protein or N9-GP extended half-life Factor IX concentrates
Factor IX (FIX) exhibits significant extravascular distribution and binds type IV collagen in the subendothelial extracellular matrix in the extravascular space, which influences its function and phar...
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 23/07/2026
Recipient had early and delayed cardiotoxicity after #AAV gene therapy. Clinical biopsy allowed us to characterize the molecular efficacy in the heart in humans for the first time. @chopresearch.bsky.social
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 07/07/2026
Instead of using his well-deserved #MakeAWish for himself, this teenager with a critical illness chose to use it to support unhoused children in #Philadelphia. 👇 Learn more about his story and how you can support this effort.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 25/06/2026
Interested in clinical #aav #genetherapy for #hemophilia or other genetic disorders. 1 day everything you need to know symposium at @chopresearch.bsky.social
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 20/05/2026
Lots of nuances in this case that very much limits generalizability to all AAV gene therapy, but also highlights importance of vector design and long term follow up. Boy’s brain tumor tied to gene therapy | Science | AAAS www.science.org/content/arti...
science.org
Boy’s brain tumor tied to gene therapy
Researchers report first cancer caused by virus widely used to deliver genes, but say risk is low
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 19/05/2026
Long term efficacy and safety after AAV gene therapy for #hemophilia B with Padua with lowest vector dose: www.sciencedirect.com/science/arti... Commentary: ashpublications.org/bloodadvance...
sciencedirect.com
Safety, efficacy, and patient-reported outcomes 6 years after fidanacogene elaparvovec in adults with hemophilia B
Fidanacogene elaparvovec is a single-dose gene therapy designed to express the high-activity factor IX (FIX) variant FIX-R338L. Participants (N = 15) …
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 13/05/2026
First case of AAV associated oncogenesis at #ASGCT and now available at NEJM. Very important, this is an extremely rare and an anticipated event that does NOT change the overall long term safety of AAV gene therapy. www.nejm.org/doi/full/10....
nejm.org
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Reposted by Ben Samelson-Jones, MD, PhD
Rosalie Lawrence @rosalielawrence.bsky.social · 13/11/2024
The Lawrence Lab website (lawrence-lab.org) is live and we are hiring for our launch in Jan 2025! We combine high resolution structure 🔬 and cell biology 🧪🧫 approaches to define mechanisms of stress response signaling in health and disease. Live postings below--Please RT and send to recent grads!
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Reposted by Ben Samelson-Jones, MD, PhD
American Society of Hematology @ash.hematology.org · 14/01/2026
NIH funding powers discoveries that improve outcomes for patients with blood disorders. ASH calls on Congress to act before the January 30 deadline and secure robust funding for NIH in the FY26 Labor-HHS bill. ow.ly/g01w50XWV6v #ResearchSavesLives #HemeSky #Fight4Hematology
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 02/12/2025
I’m asking you to join me in supporting the Williams Syndrome Association this Giving Tuesday. Every gift strengthens our ability to support families like ours navigating the challenges and joys of Williams syndrome. Donate @ GiveWSA.org or by texting GIVEWSA to 71777
Holiday day card appealing for donations for the Williams Syndrome Association on Giving Tuesday. Squares of holiday wrapping paper are interspersed with sweet photographs of people with William Syndrome smiling. 

Donate @ GiveWSA.org or by texting GIVEWSA to 71777
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 17/10/2025
#genetherapy for #hemophilia can be life changing. Proud to offer this transformative treatment at @childrensphila.bsky.social Gene therapy changed the life of a South Jersey man with hemophilia | PhillyVoice www.phillyvoice.com/gene-therapy...
phillyvoice.com
Receiving gene therapy for hemophilia changed this South Jersey man's life
The novel treatment, partly developed by CHOP, eliminates the need for regular infusions while preventing the life-threatening bleeds caused by the condition.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 22/09/2025
I’m honored to be speaking at the 14th WFH Global Forum in Montreal, Nov 13–14, 2025! 🌍 Join us for global insights on #BleedingDisorders care—covering #GeneTherapy, #VWD, safety, and more—all through the lens of equitable access. Learn more 👉 wfh.org/global-forum/
wfh.org
WFH 2025 Global Forum
QUICK LINKS About the Global Forum Governmental Welcome Agenda Registration information Committee & Speakers Venue Travel Global Forum News Sponsors Advances and access to safe treatment products for ...
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 30/07/2025
I don’t even know where to start. Trump administration blocks NIH from awarding any research grants and contracts www.statnews.com/2025/07/29/t... via @statnews.com
statnews.com
Trump administration blocks NIH from awarding any research grants and contracts
The order applies to the entirety of new and, possibly, ongoing research grant dollars that go to universities and academic medical centers.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 30/07/2025
As #hemophilia B therapeutics become more sophisticated, there is an ⬆️ need to better understand genotype–phenotype relationships. Our in vitro studies are consistent with recent in silica approaches: www.sciencedirect.com/science/arti...
sciencedirect.com
“An integrated multitool analysis contributes elements to interpreting unclassified factor IX missense variants associated with hemophilia B”: comment from Lee et al.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 25/06/2025
We have the best hematologists at @chopresearch.bsky.social #ISTH2025 @hilarywhitworth.bsky.social
Black and white picture of smiling pediatric hematologists from the oldest pediatric hospital in the US.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 24/06/2025
Impaired fibrinolysis in APS, provides mechanism for elevated rate of CTEPH in APS. #ISTH2025
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 24/06/2025
Brilliant visualization of extravascular FIX and very interesting (and surprising) differences in specific activity of extravascular FIX and FX in different tissues. 🤯 #ISTH2025 #hemesky
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 22/06/2025
😳 Thrilled we finally have a apixaban pediatric FDA approval to implement these changes.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 22/06/2025
Potential emerging signal difference in ADAs in next-generation FVIII(a)-mimetics. 0/61 for Mim8 but 2/30 for NXT007. Surveillance may not be the same. #ISTH2025 #hemophilia #hemesky
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 22/06/2025
#Hemophilia A patient treated with Hympavzi developed spontaneous DVT 3 years into treatment. Factor V Leiden heterozygous and sedentary lifestyle identified as risk factor. #ISTH2025
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 22/06/2025
Pediatric #thrombosis guidelines, guidance, and clinical trials need to distinguish between older and younger children. #ISTH2025 #hemesky
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 21/06/2025
Sabatino from @chopresearch.bsky.social giving a comprehensive overview of genotoxicity after AAV #genetherapy.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 21/06/2025
Rate of immunosuppression after #genetherapy for #hemophilia B with #Hemgenix in the real-world seems higher than the ~20% rate reported in clinical trial. Though small numbers here, also consistent with anecdotal results. We will need more rigorous real-world data. #ISTH2025 #hemesky
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Reposted by Ben Samelson-Jones, MD, PhD
Scary Lannert @klannert.bsky.social · 21/06/2025
Compelling evidence presented at #isth2025 by Sebastian Leyes Porello from @samelsonjones.bsky.social’s group showing mim8 can enhance activity in hemophilia B variants in vitro, above enhancement this group saw with emicizumab. Curious about in vivo data teased during the Q&A 👀 #hemesky @isth.org
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 21/06/2025
Nuanced points about the use the term “Cure” when discussing #genetherapy for #hemophilia at #ISTH2025. I agree about avoiding “cure” in clinical setting but really liked that this might be different in discussions about Allocations or Research Funding.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 21/06/2025
IMO biggest update at Guideline presentation at #ISTH2025 is this recommendation for primary #VTE prophylaxis in children receiving long-term TPN. I wish there was better GUIDANCE on intensity and type of anticoagulation for this recommendation.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 21/06/2025
Can't wait for #ISTH2025 to start! Our group from @chopresearch.bsky.social is presenting the first abstract and the last, and a few in between, all about #hemophilia B. #Hemesky
Action shots of people enjoying ISTH events with a badge in the middle saying FOLLOW ME FOR UPDATES FROM #ISTH2025
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 11/06/2025
Looking forward to #ISTH2025 and especially this session with Dom. #hemophila #genetherapy
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 22/05/2025
I discuss our #asgct2025 abstract highlighting our multidisciplinary team approach to care for #genetherapy recipients. Stay tuned, lots more to come. www.cgtlive.com/view/samelso...
cgtlive.com
Ben Samelson-Jones, MD, PhD, on Conservative Management Following Treatment With DMD Gene Therapy Elevidys
The associate director of clinical in vivo gene therapy at Children’s Hospital of Philadelphia discussed a case he presented at the American Society of Gene and Cell Therapy’s 2025 meeting.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 20/05/2025
Nice article about ongoing work to bring #genetherapy to pet dogs with #hemophilia. Includes the importance of the research colonies in developing new therapies, both for humans and 🐶. Cute pictures! Veterinarian aims to bring hemophilia treatment to pet dogs - News news.vin.com/default.aspx...
news.vin.com
Veterinarian aims to bring hemophilia treatment to pet dogs
Effort to fund new gene therapy study spotlights rare disease with elusive remedy
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 15/05/2025
#williams syndrome is a rare genetic disorder with a fascinating but challenging neurocognitive profile. www.bbc.com/future/artic...
bbc.com
Williams Syndrome: The people who are too friendly
People with Williams Syndrome treat strangers as their new best friends. Now the condition is revealing clues to our evolutionary past – and what makes us human.
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Reposted by Ben Samelson-Jones, MD, PhD
International Society on Thrombosis and Haemostasis @isth.org · 14/05/2025
For the first time in 16 years, ISTH is returning to the U.S. for an in-person Congress. As we prepare to welcome the world to Washington, D.C., we’re guided by our mission & appreciation for our community🌍 Read more @jthjournal.bsky.social: www.jthjournal.org/article/S1538-7836(25)00213-2/abstract
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 30/04/2025
It is essential for #genetherapy progress for unsuccessful clinicals trials to be published. We discuss recent study showing no benefit for prophylactic steroids after #AAV for #hemophilia. authors.elsevier.com/a/1k-re5TuFx... w/ @rkaczmarekdr.bsky.social
authors.elsevier.com
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 18/04/2025
In addition to demonstrating long-term durability of rAAV #genetherapy, here we show: 1) Hemostatic potential of FIX Padua with multiple major trauma not needing additional treatments. 2) Importance of limiting hepatotoxic exposures with binge drinking associated with irreversible FIX loss.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 17/04/2025
Thrilled to mark World #Hemophilia Day with this paper showing long-term benefits after #AAV gene therapy for #hemophiliaB prn.to/4iraiEH Paper at: www.nejm.org/doi/10.1056/...
prn.to
Children's Hospital of Philadelphia Researchers Find Gene Therapy Shows Long-Term Benefits for Hemophilia B Patients
/PRNewswire/ -- Researchers at Children's Hospital of Philadelphia (CHOP) in collaboration with researchers at Royal Prince Alfred Hospital in Sydney,...
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 17/04/2025
Longest follow up of expressing hyperactive factor IX Padua after #genetherapy for #hemophilia. Mostly stable transgene-product levels (except w/ binge drinking), major traumas without additional treatment, no IP related-safety concerns.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 09/04/2025
#Pediatric Scientist Development Program grant was terminated. The federal grant that has sustained PSDP for over 35 years was abruptly ended with no opportunity for appeal. This is utterly unconscionable if you care about the health of children. amspdc-psdp.org/psdp-advocac...
amspdc-psdp.org
Advocacy Resources - Pediatric Scientist Development Program
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Reposted by Ben Samelson-Jones, MD, PhD
American Society of Hematology @ash.hematology.org · 08/04/2025
ASH and 90+ Organizations Call for HHS to Immediately Restore CDC’s Division of Blood Disorders. Without it, patients with blood diseases face preventable risks. ASH is calling for its restoration. 🔗 bit.ly/4jt5sYv #Fight4Hematology #HemeSky
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Reposted by Ben Samelson-Jones, MD, PhD
Paul Renfro @renfro.bsky.social · 08/04/2025
Ryan White died thirty-five years ago today. To mark the occasion and to celebrate Ryan’s remarkable life, @teenvogue.com has published this excerpt from my new book. 🗃️ www.teenvogue.com/story/ryan-w...
teenvogue.com
The True Story of an Indiana Teen Barred From School Over His AIDS Diagnosis
Ryan White changed perceptions of the disease in the United States.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 28/03/2025
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 20/03/2025
Alternative #genetherapy approaches for #hemophilia A have recently demonstrated exciting proof-of-concept clinical results. Here I discuss 2 ex vivo approaches: www.sciencedirect.com/science/arti... For more info on current #AAV approaches, see ashpublications.org/bloodadvance...
sciencedirect.com
Ex vivo lentiviral gene therapy for severe hemophilia A: an alternative to recombinant adeno-associated viral-based strategies?
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 14/03/2025
#HTRS2025 social media ambassador. Great follow. #hemesky
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 10/03/2025
Rigorous scientific evidence rarely demonstrates a treatment results in a “miraculous and instantaneous recovery.” This is the semantics of a charlatan. #Medsky www.nytimes.com/2025/03/10/h...
nytimes.com
Kennedy Links Measles Outbreak to Poor Diet and Health, Citing Fringe Theories
In a recent interview, the health secretary also suggested that the measles vaccine had harmed children in West Texas, center of an outbreak.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 28/02/2025
Phew indeed Wordle 1,350 6/6 ⬜⬜⬜⬜⬜ ⬜⬜⬜⬜⬜ ⬜⬜🟨⬜⬜ ⬜🟩⬜⬜🟩 🟩🟩⬜⬜🟩 🟩🟩🟩🟩🟩
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 26/02/2025
What are doing as society that we let children die of preventable diseases? #pediatrics apnews.com/article/meas...
apnews.com
An unvaccinated child has died in the Texas measles outbreak
A child who was not vaccinated has died from measles in West Texas. It's the first death in an outbreak that began late last month and the first from measles in the U.S. since 2015.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 24/02/2025
I discuss the biological basis of new #hemophilia therapies. ow.ly/azsR50V3XBP
ow.ly
Blood Podcast | Blood | American Society of Hematology
Blood Podcast | Blood | American Society of Hematology Blood Podcast   The editors of Blood are pleased to introduce a podcast series, published weekly in conjunction with each iss...
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 21/02/2025
At @chopresearch.bsky.social, we care for patients up to 22 years of age and have had excellent outcomes for Paget-Schroetter syndrome (effort thrombosis) with a multidisciplinary approach. #HemeSky www.tmz.com/2025/02/20/v...
tmz.com
Victor Wembanyama Expected to Miss Remainder of Season Due To Blood Clot
The Spurs are expected to be without superstar big man Victor Wembanyama for the rest of the season due to a blood clot in his shoulder.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 15/02/2025
I highly recommend any of Barton Roueche’s collections to understand what Epidemic Intelligence Service officers do. Who else are you going to call when 11 blue men show up in your ER? #medsky
Picture of Burton Roueche books: the incurable wound, medical detectives, and medical detectives volume 2.
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Ben Samelson-Jones, MD, PhD @samelsonjones.bsky.social · 08/02/2025
#NIH funding is an economic driver across the country: www.unitedformedicalresearch.org/nih-in-your-...
unitedformedicalresearch.org
NIH In Your State - United For Medical Research
Select a state on the map to see the impact of NIH funding across America.
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