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No FDA permission, no problem: New flavored vape policy worries experts

The tobacco industry chalked up another win on Friday with a new policy announced by the Food and Drug Administration that gives what one expert called a “get-out-of-jail-free card” to some manufacturers illegally selling e-cigarettes and nicotine pouches.

The FDA has a significant backlog of applications from the makers of vapes and nicotine pouches seeking authorization to sell their products. Some have gone ahead and put their products on sale anyway while awaiting word from the agency. In the new guidance, first reported by the New York Times, the agency said it will not prioritize cracking down on illegal sales under two conditions.

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Endometriosis May Increase Risk of Birth Defects

Women with endometriosis have a small but significant increased risk for having babies with birth defects, such as those affecting the heart, gastric, genital, or musculoskeletal system, compared with women without the condition.

As reported in the Canadian Medical Association Journal, 6.3% of infants born to women with endometriosis included in the study had a congenital anomaly, compared with 5.4% of infants born to those without the condition.

Notably, only around 11% of the increased risk could be attributed to fertility treatment meaning that the condition itself is likely responsible for the small increase in risk. It suggests that endometriosis itself, likely through inflammatory pathways, oxidative stress, or epigenetic mechanisms, may directly disrupt fetal organogenesis.

Endometriosis is a chronic condition where tissue similar to the uterine lining grows outside the uterus, causing severe pelvic pain, painful periods, and often infertility. It affects an estimated 6.5 million women in the U.S., though many go undiagnosed for years.

“Endometriosis can trigger inflammation and oxidative stress, which have been linked to abnormal organogenesis in offspring. This disruption in organogenesis can lead to functional or structural anomalies that occur in utero, which typically develop in the first trimester of gestation,” write lead author Bailey Milne, Queen’s University, Kingston, Ontario, and colleagues.

“Some studies have reported an increased risk of genital defects among infants born to women with endometriosis; however, data are lacking on the risk of other congenital anomalies.”

To investigate this further, Milne and team conducted a large population-based cohort study using Ontario health administrative data, examining over 1.46 million births between 2006 and 2021. The aim was to quantify the risk of congenital anomalies in infants born to women with a pre-existing diagnosis of endometriosis.

Overall, 33,619 (2.3%) women included in the study had endometriosis. Women with endometriosis had a 16% increase in risk for having a baby with a congenital birth defect compared with women without the condition and 89% of this risk could be attributed to the presence of endometriosis and not possible confounding factors like fertility treatment. The most common associated defects were cleft palate, male genitourinary malformations, and cardiovascular abnormalities.

“Although this study contributes to accumulating data on a potential increased risk of birth defects for infants born to patients with endometriosis, the specific mechanistic pathways remain largely unknown,” write Milne and coauthors.

“A theorized mechanism by which endometriosis might increase risk of any congenital anomaly is through inflammatory pathways. The existing literature suggests a need for more comprehensive models that integrate genetic, epigenetic, and environmental factors to better understand this.”

The post Endometriosis May Increase Risk of Birth Defects appeared first on Inside Precision Medicine.

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Calming Minds Study

Conditions: Anxiety; Anxiety Depression; Worry; Depression; Rumination – Thoughts

Interventions: Behavioral: Be Specific; Behavioral: Be Kind; Behavioral: Be Present; Behavioral: Break Habit; Behavioral: Psychoeducation

Sponsors: University of California, Los Angeles; University of Exeter

Not yet recruiting
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StockWatch: enGene Shares Crater on Declines in Complete Response Rates to Bladder Cancer Therapy

enGene (NASDAQ: ENGN) stock suffered an 83% plunge this past week that reflects just how competitive the field is among drug candidates for nonmuscle invasive bladder cancer (NMIBC)—and how questions over clinical data are enough to send investors scurrying to sell their shares.

enGene shares cratered 81% Thursday from $8.85 to $1.72, then fell another 13% Friday, reaching a 52-week low as it finished the week at $1.50.

The sharp falloff followed enGene reporting updated data from its Phase II LEGEND trial (NCT04752722) assessing its nonviral gene therapy candidate detalimogene voraplasmid in high-risk, Bacillus Calmette-Guérin (BCG)-unresponsive NMIBC patients with carcinoma in situ (CIS) with or without concomitant papillary disease (CIS±papillary). The data showed a drop in response rates from a November 2025 readout, falling short of company and Wall Street expectations.

As of the April 21 data cutoff, 67 of 124 evaluable patients treated with detalimogene (formerly EG-70) achieved a 54% complete response (CR) at any time, a rate that fell to 43% (52 of 121 evaluable patients) CR rate at six months. That compares with the 63% CR at any time and 62% CR rate at six months shown for the first 62 patients assessed, as announced by enGene in November 2025.

Also, detalimogene showed a nine-month CR rate of 32.7%, which fell to 13.3% at 12 months after treatment. Engene said it will present its data at the American Urological Association Annual Meeting (AUA 2026), set for May 15–18 in Washington, DC.

“While durability outcomes to date are not what we hoped, these data are preliminary,” enGene president and CEO Ron Cooper stressed in a statement. “We are focused on evaluating the totality of the data as it evolves and plan to continue to engage with the FDA and the medical community.”

Speaking to analysts, Cooper added: “The data are not yet fully mature, and the durability picture is incomplete. We plan to await longer-term durability data for all of Cohort 1 in the second half of the year and continue our ongoing discussion with the FDA regarding both our statistical analysis plans and plans for potential BLA filing.”

“Below key benchmarks”

At least two analysts warned that the updated data will make it harder for enGene to compete with other developers of NMIBC treatments now in the clinic.

“Durability now screens below key benchmarks in the setting, which makes it hard for us to underwrite meaningful commercial upside for detalimogene in what will be a crowded mkt, where ~40% 12‑mo CR is the bar to clear,” cautioned Maury Raycroft, PhD, equity analyst with Jefferies, in a research note.

Raycroft slashed enGene’s 12-month price target 82% from $28 to $5. More ominously, Raycroft chopped Jefferies’ peak sales forecasts for detalimogene by 79%—from the $1.7 billion forecasted for the gene therapy across CIS±papillary, papillary‑only, and BCG‑naïve NMIBC, to $350 million for CIS±papillary alone.

The NMIBC treatment space has expanded in recent years as established drugs like the cancer immunotherapy blockbuster Keytruda® (pembrolizumab), marketed by Merck & Co. (NYSE: MRK), have been joined on the market by newer therapies.

One is Johnson & Johnson (NYSE: JNJ)’s Inlexzo™ (gemcitabine), an intravesical drug releasing system (iDRS) designed to provide sustained local delivery of a cancer treatment into the bladder. Two other newer therapies are Adstiladrin® (nadofaragene firadenovec-vncg), a nonreplicating adenoviral vector-based gene therapy indicated for high-risk BCG-unresponsive NMIBC with CIS±papillary and marketed by privately held Ferring Pharmaceuticals (which licensed the drug from another private company, FKD Therapies, in 2018); and ImmunityBio (NASDAQ: IBRX)’s interleukin-15 (IL-15) receptor agonist Anktiva® (nogapendekin alfa inbakicept-pmln), indicated with BCG. ImmunityBio is part of the privately held NantWorks portfolio of companies.

Those marketed drugs are expected to be joined over the next couple of years by candidates being developed by:

  • CG Oncology (NASDAQ: CGON), which is expected to report topline data from the Phase III PIVOT-006 trial (NCT06111235) of cretostimogene grenadenorepvec, also called CG0070, as an adjuvant therapy in intermediate-risk NMIBC. First results on the combo of cretostimogene with gemcitabine from the Phase II CORE-008 trial (NCT06567743) are to be presented at AUA 2026.
  • Relmada Therapeutics (NASDAQ: RLMD), which will present two abstracts focused on its NDV-01, a sustained-release intravesical formulation of gemcitabine and docetaxel being developed to treat NMIBC at AUA 2026. Relmada plans to present nine-month complete response data from its open-label Phase II trial (NCT06663137) assessing NDV-01 in high-risk NMIBC, as well as discuss its open-label Phase III BOOST trial (NCT07313891), which is evaluating NDV-01 vs. surveillance following transurethral resection of bladder tumor (TURBT).

Mani Foroohar, MD, senior managing director, genetic medicines, and a senior research analyst with Leerink Partners, noted that enGene’s 54% any time and 43% six-month updated CR rates lagged behind those of three competitors: Anktiva (71% and 56%), cretostimogene (75.5% and 64%), and Inlexzo (82% and 59%). However, he added that Adstiladrin was more comparable to detalimogene, which showed rates of 51% and 41%.

Competitive position concern

“Weaker data in recent patient cohorts and lower-than-expected durability trends undermine our confidence in [detalimogene]’s competitive position and essentially foreclose the possibility of closing the efficacy gap with CGON, JNJ, etc., in a later LEGEND update,” Foroohar wrote in a research note.

“With shares trading at a level pricing in program failure, investor focus will center on cohort consistency, data evolution with longer follow-up, and FDA interpretation of the totality of the dataset (questions that will take time to address and will not be resolved prior to full LEGEND data/subsequent regulatory engagement,” Foroohar added.

Like Raycroft, Foroohar also now projects $350 million in unadjusted peak year sales for detalimogene, shredding his firm’s projection by 65% from $1 billion.

“From here, investor discussion will center on whether longer follow-up and additional cohort maturation can stabilize efficacy trends ahead of further FDA engagement in 2H26.”

enGene and Cooper insist that detalimogene is more than up to the challenge of competing with other NMIBC treatments. Of the 52 patients who responded at six months, 37 of 44 patients who had a nine-month assessment were in CR (an additional eight patients are pending evaluation), while 13 of 22 patients who had a 12-month assessment were in CR (an additional 11 patients are pending evaluation).

Among patients who showed the 43% six-month CR rate, 14% (6 of 43) successfully converted from non-CR to CR post re-induction.

The company cited other data from the LEGEND trial showing that the progression rate to muscle-invasive or advanced disease was 3.2%, a figure enGene calls low. Detalimogene was generally well tolerated, the company added, with 55% of patients having experienced a treatment-related adverse event (TRAE), mostly mild (Grade 1 and 2), though six patients (4.8%) reported a Grade 3 TRAE.

“These updated data continue to reinforce the favorable safety and tolerability profile of detalimogene and its clinical activity in a heavily pretreated, high-risk NMIBC patient population with limited therapeutic options,” enGene’s Cooper stated. “Importantly, the low rate of progression to muscle-invasive disease leaves patients eligible for other bladder-sparing therapies.”

Detalimogene’s favorable safety profile was also acknowledged by Jefferies’ Raycroft: “We continue to view this administrability/safety profile as a core differentiator vs other intravesical gene/immune constructs (and a key adoption lever), even as durability to date is tracking below expectations.”

IPO roundup: Odyssey raises $304M, drops 9%

Odyssey Therapeutics (NASDAQ: ODTX) raised $304 million in gross proceeds through an upsized initial public offering (IPO) by selling 15.5 million shares priced Thursday at $18 a share, the top of its $16–$18 range, and well above the 13.2 million shares it disclosed in its prospectus just before the offering. Concurrently, an affiliate of TPG Life Sciences Innovations purchased 1.39 million shares at the IPO price, raising another $25 million for Odyssey.

But on their first full day of trading on Friday, Odyssey’s shares fell 9%, closing at $16.42, as investors deemed the upsizing to be aggressive.

Odyssey, a developer of targeted therapies for autoimmune and inflammatory diseases, said it would use approximately $135 million in IPO proceeds to advance its lead candidate, the oral small molecule RIPK2 scaffolding inhibitor OD-001, through 12-week induction readouts from its planned Phase IIa combination trial and Phase IIb monotherapy trial in ulcerative colitis.

Plans also call for using approximately $50.0 million of proceeds to advance Odyssey’s oral small molecule SLC15A4 inhibitor OD-002 through IND-enabling activities and a planned Phase I/IIa trial; and the rest for additional discovery, preclinical, and clinical activities for disclosed or future programs, enabling capabilities, as well as general corporate purposes, working capital, and other capital expenditures.

An option to purchase up to an additional 2.325 million shares at the IPO price is held by Odyssey’s IPO underwriters: J.P. Morgan, TD Cowen, and Cantor are joint book-running managers, while Wedbush PacGrow and Oppenheimer are co-lead managers.

The Odyssey IPO is one of four biotech IPOs emerging in recent weeks:

  • Hemab Therapeutics Holdings (NASDAQ: COAG), based in Cambridge, MA, and Copenhagen, closed its IPO on May 4, having raised $346.7 million by selling 19,262,500 shares at $18 a share—the original offering of 16.75 million shares, plus all 2,512,500 shares for which underwriters held purchase options. Goldman Sachs, Jefferies, and Evercore ISI were joint book-running managers; Wedbush PacGrow was the lead manager. Shares have since jumped 40%, closing Friday at $25.12.
  • Seaport Therapeutics (NASDAQ: SPTX) of Boston garnered $254.88 million on April 30 by selling 14.16 million shares at $18 a share. Seaport’s underwriters have a 30-day option to buy an additional 2.124 million shares at the IPO price less underwriting discounts and commissions. Goldman Sachs, J.P. Morgan, Leerink Partners, Citigroup, and Stifel are joint book-running managers. Shares have since slipped 11%, closing Friday at $16.05.
  • A day earlier, Avalyn Pharma (NASDAQ: AVLN), also of Boston, launched an IPO that garnered $300 million by selling 16,666,667 shares at $18 a share—and revived the market of biotech initial offerings after a lull during March and early April. Avalyn ultimately racked up $345 million in gross proceeds after its underwriters exercised in full their option to buy 2.5 million more shares at the IPO price. Morgan Stanley, Jefferies, Evercore ISI, and Guggenheim Securities were joint book-running managers. Shares have since vaulted 52%, closing Friday at $27.33.

Leaders and laggards

  • Atara Biotherapeutics (NASDAQ: ATRA) shares nearly doubled, leaping 92% from $5.15 to $9.93 Thursday after saying its partner Pierre Fabre Pharmaceuticals (PFP) had a productive Type A meeting with FDA officials to discuss an approval path for tabelecleucel (tab-cel). PFP’s Biologics License Application (BLA) has been rejected twice by the agency through Complete Response Letters, the most recent one in January. The FDA, Atara said, agreed that a single-arm study with an “appropriate” historical control, conducted in a pre-specified manner, “could serve as an adequate and well-controlled study and provide safety and efficacy data in support of a future marketing application.” Atara said PFP intends to submit updated data with longer follow-up from the pivotal Phase III ALLELE trial (NCT03394365) assessing tabelecleucel in adults and children ages 2+ with relapsed/refractory Epstein-Barr virus plus post-transplant lymphoproliferative disease (PTLD) following solid organ transplant or hematopoietic cell transplant.
  • Entrada Therapeutics (NASDAQ: TRDA) shares nosedived 57% Thursday from $16.03 to $6.85 after the genetic medicine developer reported topline data from Cohort 1 of the multiple ascending dose (MAD) portion of the Phase I/II ELEVATE-44-201 trial (NCT07037862) that the company called positive, but which disappointed investors. Entrada said its Duchenne muscular dystrophy (DMD) candidate ENTR-601-44 met the trial’s primary objective by showing favorable safety and tolerability, no discontinuations, and no serious adverse events. But data showed an increase of 2.36% in dystrophin from a baseline of 4.00%—compared to the 10% increase sought by analysts such as Myles R. Minter, PhD, of William Blair. “Management is attributing the miss on biomarker data to lower-than-expected drug exposure,” Minter wrote, “likely due to the transition from dosing adults to juvenile patients.” Entrada cited other positive data, such as lower plasma exposure in Cohort 1 participants ages 6–17 vs. healthy adult volunteers; and markers of kidney function via eGFR, Cystatin C, and magnesium all falling within normal ranges and comparable to placebo.
  • Moderna (NASDAQ: MRNA) shares rose 12% Friday from $48.54 to $54.35 after a news report that the messenger RNA (mRNA)-based vaccine developer was researching vaccines designed to protect against hantaviruses. In a statement, Moderna disclosed that it has carried out early-stage vaccine research on hantaviruses with the U.S. Army Medical Research Institute of Infectious Diseases and is also partnering with the Vaccine Innovation Center at Korea University College of Medicine on a potential jab. “These efforts are early-stage and ongoing and reflect Moderna’s broader responsibility to develop countermeasures against emerging infectious diseases,” Moderna told Bloomberg News. As of Friday, the World Health Organization (WHO) has reported eight cases of hantavirus, including three deaths, among passengers aboard the MV Hondius cruise ship, traveling between Argentina and the Canary Islands in the Atlantic Ocean.
  • Viridian Therapeutics (NASDAQ: VRDN) shares jumped 33% from $14.06 to $18.75 Tuesday after the autoimmune and rare disease drug developer announced positive topline data from the Phase III REVEAL‑2 trial (NCT06625398) assessing elegrobart in chronic thyroid eye disease (TED). Doses of elegrobart given every 4 and 8 weeks achieved what Viridian called “highly statistically significant” 50% and 54% proptosis responder rates (PRR) at week 24, respectively, vs. 15% for placebo. Elegrobart is a subcutaneously delivered, half‑life‑extended monoclonal antibody targeting the insulin‑like growth factor‑1 receptor (IGF‑1R). Viridian said it remains on track to submit a Biologics License Application (BLA) to the FDA for elegrobart in Q1 2027. Viridian cashed in on the news by launching underwritten public offerings of $150 million in convertible senior notes due 2032 and $100 million in Series B nonvoting convertible preferred stock.

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Experts wonder ‘Where is the CDC?’ as hantavirus outbreak unfolds

NEW YORK — No quick dispatching of disease investigators. No televised news conference to inform the public. No timely health alerts to doctors.

In the midst of a hantavirus outbreak that involves Americans and is making headlines around the world, the U.S. government’s top public health agency, the Centers for Disease Control and Prevention, has been uncharacteristically missing in action, according to a number of experts.

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STAT+: Capricor Therapeutics accuses Nippon Shinyaku of slow-walking plans on Duchenne drug

Capricor Therapeutics accused Nippon Shinyaku and its U.S. subsidiary of failing to follow through on marketing plans for a Duchenne muscular dystrophy treatment, and refusing to fix a pricing glitch that was belatedly discovered in their exclusive distribution agreement.

A key issue is a “fatal flaw” in a pricing formula that would make it “economically impracticable” for the therapy to reach patients covered by Medicare, Medicaid, and private insurers, according to a lawsuit filed in a New Jersey state court on Thursday. Nippon Shinyaku and NS Pharma, the subsidiary, disclosed the problem in March 2025.

Basically, the formula ties Medicare reimbursement to the price that Capricor would charge NS Pharma, since it would be the only U.S. buyer. But as it stands, the lawsuit indicated that health care providers would get reimbursed less than they would pay to cover the cost of acquiring and administering the medicine, which is called deramiocel.

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Opinion: I’m fighting misinformation online. False hantavirus claims follow a now-familiar playbook

I learned about hantavirus misinformation this week in the same way I now learn about most public health misinformation: My followers sent it to me.

Within hours of the first headlines about a hantavirus outbreak linked to the expedition cruise ship MV Hondius, my DMs started filling with screenshots. One was from the account of a Texas doctor who became well known during Covid for promoting ivermectin. She was already telling followers that ivermectin would work against hantavirus, too.

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ASGCT CEO David Barrett Previews the Upcoming Conference in Boston

The 29th American Society of Gene & Cell Therapy (ASGCT) meeting kicks off in Boston next week. The annual event will be a whirlwind of sessions, keynotes, fireside chats, posters, and exhibitors.

For the second year in a row, GEN spoke with David Barrett, JD, who has been the CEO of ASGCT since 2016. In this interview, we discuss his perspective on the event, if there is anything new that attendees should be looking out for, and what he, personally, is most looking forward to.

This interview has been edited for length and clarity.

LeMieux: The ASGCT meeting is an annual event. What are some of the things that will make this year’s meeting special?

Barrett: There is a lot that is special this year. First and foremost, it feels like a bit of a homecoming which is really exciting. The last time we were in Boston was in 2008. And Boston is a city and community where gene therapy, biotech, and research are all located. You can feel it when you’re in Cambridge and I think you are absolutely going to feel that when you’re inside the convention center.

The fact that the meeting is in Boston this year is also special for me because one of the very first things I did when I joined ASGCT in 2016, was to source the location for the 2020 annual meeting at the Hynes Convention Center in Boston. I was very excited and it was the first time we were going to take up an entire convention center. But that meeting, of course, did not happen; it had to be canceled because of COVID. So that makes this meeting in Boston particularly special. We finally get to have the meeting in Boston that I’ve been hoping for since 2016!

And we are growing. We are at the bigger of the two convention centers in Boston. We are going to surpass the total number of people that we had last year and I have every expectation that we’ll see significant growth year over year.

As far as other things that are that are new and interesting this year… I said this last year, but it’s worth adding it again—the science is always different. It is very consistent that we will have great science every year, and it is a wonderfully fun question mark of what exactly that science is going to look like. It’s always exciting because the science is always different year after year. So, by its very nature, it will be an exciting new conference this year.

Also, we’ll have a puppy park in the exhibit hall, so that’s really fun!

LeMieux: What are some things that will be highlighted at the meeting that ASGCT has been working on over the past year?

Barrett: ASGCT has done a lot this year. There is a lot that we have been very vocal about so far, and there is a lot that we’ll be sharing during the annual meeting.

Number one is that we partnered with Orphan Therapeutics Accelerator (OTXL) to found CGTxchange—the first and only clearing house and marketplace of its kind for cell and gene therapy assets. It is being built as we speak and we’ll have some exciting announcements during the annual meeting about assets that will hopefully be in the CGTxchange by that point. It is the culmination of a lot of work on what to do about commercially pre-viable (not non-viable) cell and gene therapies and the work that we’re doing to make those more commercially possible.

Also, ASGCT is hosting its Momentum Gala—the first formal gala at our annual meeting. That event has resonated really well with sponsors and donors. In fact, it is sold out! That event is going to be used to celebrate the launch of ASGCT Foundation, which is a separately incorporated 501C3 charitable foundation to support ASGCT’s mission to advance early career researchers and enable the development of cell and gene therapies. Also at the gala, we’ll be announcing some new initiatives to support patient access and reduce barriers to diagnosis, clinical trial participation, and treatment with cell and gene therapies.

Another major thing that’s going on is a considerable expansion of our educational activities. We recently launched a new e-learning tool and platform—the ASGCT Learning Center—a really fun project that we’ve been working on to expand how we we are getting new content to our new and expanding audiences.

We recognize that we have a really broad audience at ASGCT that is made up of cell and gene therapy basic science researchers, translational researchers, physician scientists and others in the ecosystem of drug development and administration for cell and gene therapies. And we’re looking at new ways to provide content that can help satisfy the learning needs of that really broad audience. The learning center is a big tool in our quiver to be able to do that.

LeMieux: What do you hope people take away from the meeting?

Barrett: I hope they take away a couple of things… number one, I hope they take knowledge, education, and awareness of what’s going on in the space and what has been happening over the course of the last 12 months. I hope that they take that back to their individual place of work. And I hope that, generally speaking, we fulfill our mission by expanding that knowledge base among all of the stakeholders in cell and gene therapy. Another thing that I hope people take away from this is that, after a lot of ups and downs and undulations in this field over the course of the past two to three years, that there is an extraordinary sense of excitement about the next phases in the development of cell and gene therapy drugs.

We have some really exciting new regulatory pathways. We have a lot of development of personalized gene editing technologies and techniques that can bring gene therapies much more quickly and effectively to patients who need them. We have seen significant advancements in more traditional or classic AAV gene therapies that are allowing these to be safer and more efficacious. And we’re seeing an expansion of cell-based gene therapies through an ever-expanding portfolio of indications that are reached by CAR Ts, primarily in cancer, but in an expanding outlook for the use of CAR Ts outside of cancer as well. So, I am hopeful that attendees come away with a renewed energy and vigor for the development of satellite gene therapies.

LeMieux: Is there anything specific planned at the meeting to touch on the concerns of the challenges that the scientific community is facing right now—with funding or other barriers?

Barrett: We are very excited to have Katherine Szarama, PhD—who was recently named acting director of FDA’s Center for Biologics Evaluation and Research (CBER)—participating in a fireside chat, addressing regulatory uncertainties. [Szarama replaced Vinay Prasad, MD, MPH, on May 1st.]

We have two other fireside chats focused on regulation, as well. The three fireside chats will offer attendees an opportunity to learn a little more, ask some questions, and hear from some of the individuals in those sessions specifically.

But I think that people will also see, more broadly, the ongoing work that ASGCT is doing to continue to create a partnership and a positive working relationship with the FDA to support those regulatory concerns.

LeMieux: What are you most looking forward to?

Barrett: I think I said this last year, but it really is one of my favorite components of the annual meeting. Every year, I look forward to taking some time to watch the exhibit hall being built. When the rope drops and people enter the exhibit hall for that very first reception, the hall is in pristine condition. And one of my favorite parts is watching it get to that pristine condition because it is just so exciting to see everything being built and come to a head, to have the whole field enter all at one space, and to be able to see an industry live and in person. Because so much of what we do is at our computer screens—and what we read about, hear about, or listen to people talk about. But when you actually see the field of gene and cell therapy on display, it is really exciting and satisfying.

Lastly, I will add that I’m looking forward to eating too much clam chowder while in Boston (chuckling).

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ParcelBio Unveils Programmable mRNA Platform Backed by $13M Financing

Biotechnology company ParcelBio said this week that it has raised $13 million in a seed financing round led by Breyer Capital with participation from General Catalyst, Y Combinator, Metaplanet, SurgePoint Capital, ZAKA VC, and other investors. The financing will support the development of the company’s proprietary Amplified and Prolonged EXpression mRNA (APEXm™) platform and advance its pipeline including an in vivo CAR T program for autoimmune disease, as well as additional programs in oncology and encoded protein therapeutics.

The company, which is developing what it describes as a new class of durable mRNA medicines, will debut APEXm and share some preclinical data at the American Society of Gene and Cell Therapy annual meeting. This year’s meeting is being held in Boston, Massachusetts and will run from May 11-15. The company claims that its data will demonstrate that ParcelBio’s APEXm RNA drives significantly higher and more durable protein expression compared to another clinical mRNA design, and yields more complete target cell depletion in in vivo CAR T models. 

“mRNA has transformed medicine, but today’s technologies are fundamentally limited in how much protein they can produce and for how long,” said David Weinberg, PhD, chief executive officer and co-founder of ParcelBio. His company’s proprietary technology addresses this problem by engineering RNA molecules to recruit the cell’s native RNA-stabilizing machinery, which enables higher and more durable protein expression. The company claims that its approach will result in medicines that reach thresholds that have historically been challenging for mRNA-based therapeutics. “We engineered RNA to work with the cell’s machinery rather than against it, enabling meaningful improvements in both expression and durability that we believe are essential for true disease modification,” Weinberg said. 

Furthermore, ParcelBio’s platform maintains a simple, linear RNA architecture unlike circular RNA and other approaches, whose structure introduces manufacturing complexity or reduces output. Its broad applicability across proteins and cell types makes it suited for various therapeutic applications including immune programming and protein replacement. 

“Most RNA platforms force a tradeoff between potency, durability, and manufacturability,” said Chris Carlson, PhD, chief scientific officer and co-founder of ParcelBio. “Our approach eliminates that tradeoff, enabling both higher peak expression and longer duration within a manufacturable system, and opening the door to entirely new classes of medicines.”

ParcelBio’s lead program focuses on in vivo CAR T therapies that target pathogenic B cells across autoimmune diseases, with the goal of achieving deep B-cell depletion for durable, drug-free remission. By enabling sustained CAR expression without viral delivery or ex vivo manufacturing, the company aims to develop scalable, off-the-shelf therapies. Additional programs leveraging the technology are currently in development in oncology and encoded protein therapeutics.

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