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Jessica Sacher

@jessicasacher

phage therapy scientist at Stanford, building community at Phage Directory, writing about adventures from the lab to the clinic -> https://jess.bio

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29.04.2023
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Latest posts by Jessica Sacher @jessicasacher

How to run a phage therapy center from your academic lab
How to run a phage therapy center from your academic lab In this episode, Joe and I sat down with Dr. Daria Van Tyne, PhD, Associate Professor of Medicine at the University of Pittsburgh and researcher in the Divis...

Check out our conversation with Daria on the Podovirus podcast!

🎧 Spotify: open.spotify.com/episode/6KX...
🎧 Apple Podcasts: podcasts.apple.com/us/podcast/...
πŸ“Ί YouTube: youtu.be/nbN4whcoJrU

10/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Where does she hope the field is in 15 years?

FDA-approved phage products, and compassionate use still running alongside them.

β€œThere will always be patients who don’t fit trials. The two will coexist.”

9/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Her research questions now come straight from the clinic:

Does resistance evolve during treatment? How often? In what way?

Can phage clear biofilms?

What actually happens to the microbiome?

8/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

On the FDA: she used to dread Friday emergency calls that felt like her PhD qualifying exam.

Now it's mostly email. 30-day windows. A program manager handling paperwork. It's routine.

β€œThey’ve evolved as the field has evolved.”

7/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

One step she won’t delegate: formulation.

Once a week, 8:30–9am β€” after preschool drop-off, before her students arrive β€” she’s alone in the lab formulating IV phage.

β€œI want to be the one to own it.”

6/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

On manufacturing, she’s optimized everything she can.

Weekly batching for susceptibility testing.

Pre-made cocktail vials in the fridge.

Multi-patient preps.

Low-bind tubes to keep phage titers stable for 6+ months.

5/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Collaboration in the phage therapy community is the theme Daria returns to often.

β€œI’ve gotten as far as I have because of the generosity of this community.”

Her biggest fear? VC money enters, greed/ego ensues, and people stop sharing phages for patients.

4/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Her first case (2020): a CF patient post–lung transplant w/ a decade-long Burkholderia infection.

None of her phages matched. She called Ben Chan @Yale. He worked overnight & had a phage within 1 wk.

This quick + helpful collaboration launched her phage therapy operation..

3/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

First, you have to build your phage library right.

Daria's team only uses the scariest bugs as bait.

They collects drug resistant clinical isolates from physician colleagues & fish for phages in hospital wastewater.

If a phage kills those bugs, it's clinically relevant.

2/

03.03.2026 23:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Post image

In 2018, @dariavantyne.bsky.social started her phage lab at @pittdeptofmed.bsky.social.

She had 0 phages, just knew their biology & wanted to help patients.

Today her lab makes phage for dozens of patients/year under compassionate use, while still publishing research.

We asked Daria: HOW?

🧡1/

03.03.2026 23:14 πŸ‘ 2 πŸ” 1 πŸ’¬ 1 πŸ“Œ 2

Oh also find John Rex here! @johnhrexmd.bsky.social

11.12.2024 18:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
Plazomicin (Achaogen) financial post-mortem: #PassPASTEUR Dear All (and with thanks to Kevin for co-authoring and also a wonkish alert … get your coffee and settle in for the details), If you’ve been around the antibiotic ecosystem for a while, you’ve hopefully heard the story of the 2019 bankruptcy of Achaogen and the subsequent loss to the entire world of its […]

6/ The solution? We need new models that pay for ACCESS, not USAGE

Think Netflix subscription > pay per view

Read the full analysis by @JohnRex_NewAbx: https://amr.solutions/2024/10/14/plazomicin-achaogen-financial-post-mortem-passpasteur/

/end

11.12.2024 17:58 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

5/ Why this matters for scientists:

We're not just losing drugs. We're losing the teams who know how to make them.

Talent is leaving the field. (The true cost of broken incentives)

11.12.2024 17:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

4/ The hidden tragedy: Plazomicin still WORKS. It could save lives.

But without a company behind it = limited global access

Like having a fire extinguisher no one can buy 🧯

11.12.2024 17:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

3/ The painful numbers from @JohnRex_NewAbx's analysis:
- $500-600M to reach approval
- +$350M to keep it on market 10yrs
- Expected sales? Minimal

Because good stewardship = less use = bankruptcy 🀯

11.12.2024 17:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

2/ The developer's paradox: "Make something AMAZING... that we hope rarely gets used"

Investors: "So we spend millions to create a drug that sits on a shelf?"
Scientists: "Yes! That's the point!"
Investors: *leaves chat*

11.12.2024 17:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

1/ The Achaogen story haunts scientists:
- Spent 9 years developing plazomicin
- Got FDA approval in 2018
- Raised $776M (!!)
- Bankrupt by 2019
- Sold for pennies: $16M

The math wasn't mathing πŸ“‰

11.12.2024 17:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

🧬 Big Pharma's antibiotic problem:
A successful drug + FDA approval = $776M loss

Here's how that happens 🧡

11.12.2024 17:58 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Or really anyone. Awesome read

09.12.2024 17:56 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

This is so good!

09.12.2024 17:55 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

Laughed out loud β€” phage field, there’s still hope for us πŸ˜‚

Source: Kate Zernike’s The Exceptions β€” highly recommend, cannot put it down!!

04.12.2024 05:10 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

Hello πŸ¦‹ #protein / #microbio / #BioML community! We are excited to release Gaia🌎, a context-aware protein search tool, extending protein search and discovery capabilities beyond sequence and structure, to include *genomic context*. Search your favorite protein sequences with on gaia.tatta.bio

19.11.2024 15:07 πŸ‘ 237 πŸ” 75 πŸ’¬ 10 πŸ“Œ 8
Video thumbnail

Do you feel stressed?
Is it one thing or a combination?

Turns out bacteria can’t handle stress either!

Excited to share my first first author paper out now in @currentbiology.bsky.social!

Combining multiple stressors blocks bacterial migration and growth! www.cell.com/current-biol...

19.11.2024 20:03 πŸ‘ 46 πŸ” 17 πŸ’¬ 5 πŸ“Œ 1
Image shows the road gritters in Scotland with their names which includes Taylor Drift, Skate Bush, Air Salter Scott, Me Snow it all, Spready Mercury

Image shows the road gritters in Scotland with their names which includes Taylor Drift, Skate Bush, Air Salter Scott, Me Snow it all, Spready Mercury

It's the time of year to appreciate the names of Scottish gritters! #Scotland

19.11.2024 13:23 πŸ‘ 657 πŸ” 171 πŸ’¬ 33 πŸ“Œ 21
Preview
Bacterial Organelles in Iron Physiology A proposed model of iron trafficking during ferrosome formation.

A review on "Bacterial Organelles in Iron Physiology" from Hualiang Pi et al.

Joe Neilands (a siderophore pioneer) once stated that Fe was too important for bacteria to export. Bacteria DO export Fe, but they can also store it in organelles.
#MicroSky

onlinelibrary.wiley.com/doi/10.1111/...

18.11.2024 00:13 πŸ‘ 37 πŸ” 14 πŸ’¬ 0 πŸ“Œ 1
Preview
Xue lab at UC Irvine Ecology and evolution in the human gut microbiome

Hi friends new and old! I study how microbes interact and evolve in complex communities like the human gut microbiome.πŸ¦ πŸ§¬πŸ’© I'm thrilled to share that I'm starting a lab at UC Irvine in April 2025 and am recruiting at all levels - please spread the word! kxuelab.com More about my work below...🧡1/n

19.11.2024 18:36 πŸ‘ 390 πŸ” 115 πŸ’¬ 24 πŸ“Œ 10

Trying to purify and sequence #phage for phage therapy?

Try #sphae a new approach to identify if your phage could be useful for treatment

#phagesky

19.11.2024 03:09 πŸ‘ 32 πŸ” 18 πŸ’¬ 3 πŸ“Œ 1
ISVM – International Society for Viruses of Microorganisms

Honoured to have been voted as President-elect of the International Society for the Viruses of Microbes (ISVM) and excited to work with the Executive Board over the next few years

#phagesky

phagesociety.org

19.11.2024 03:12 πŸ‘ 109 πŸ” 13 πŸ’¬ 9 πŸ“Œ 0
NSF COA generator

When applying to NSF for funding, each senior personnel has to provide a β€œCollaborators and Other Affiliations” (COA) form, which can be quite onerous. A couple of years ago I created a tool bit.ly/NSF_COA for automating this, and recently hardened it. I hope it is of use, and feedback is welcome! πŸ§ͺ

17.11.2024 07:22 πŸ‘ 108 πŸ” 41 πŸ’¬ 20 πŸ“Œ 6

Wonderful thank you! I will post this in Capsid & Tail this week and see who else we can bring on over!

13.11.2024 19:13 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0