Six months after launching with a mega-round of financing, Seaport Therapeutics has raised $225 million more to advance a lead drug candidate that could overcome some limitations of currently available treatments for depression.
Seaport’s platform technology, called Glyph, designs oral drugs that leverage the lymphatic system to deliver the medicine in a way that makes more of the active pharmaceutical ingredient available in the body to confer its therapeutic effect. The Boston-based company also says its drugs reduce complications such as elevated liver enzyme levels, a sign of drug toxicity that can limit the use of some molecules.
Lead Seaport program SPT-300 is a prodrug, a compound that converts inside the body into the active drug allopregnanolone. This neurosteroid modulates the GABA-A receptor to spark effects on the central nervous system. Seaport is advancing the drug into Phase 2b testing as a potential treatment for major depressive disorder with or without anxious distress. Seaport says the new capital will go toward advancing its pipeline through important clinical milestones. The company also plans to further advance the capabilities of its Glyph technology platform.
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Seaport was spun out of PureTech Health, a company that forms startups around platform technologies. In April, Seaport launched, revealing its science, its lead drug candidate, and $100 million in funding. That Series A round was led by Arch Venture Partners and Sofinnova Investments. General Atlantic led Seaport’s new Series B financing. Other participants in the latest round included T. Rowe Price Associates, Foresite Capital, Invus, Goldman Sachs Alternatives, CPP Investments, and other unnamed new investors. Founding investors Arch and Sofinnova also joined the round, as did Third Rock Ventures and PureTech Health.
Seaport is part of a bevy of life science companies that have secured new capital. Here’s a recap of recent biotech financing news:
—Radiopharmaceuticals developer Alpha-9 Oncology closed a $175 million Series C round to support its pipeline, including A9-3202, which began a Phase 1 test earlier this year in advanced melanoma. Lightspeed Venture Partners and Ascenta Capital led Alpha-9’s new financing.
—AvenCell Therapeutics has $112 million in Series B funding to continue Phase 1/2 testing of AVC-101, a CAR T-therapy that can be switched “on” or “off” to address safety and efficacy challenges of currently available cell therapies, which are always “on.” AvenCell was formed in 2021 by Intellia Therapeutics and Cellex Cell Professionals. The company’s latest financing was led by Novo Holdings.
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—Tolerance Bio launched with $17.2 million to support development of allogeneic stem cell-based cell therapies. These therapies are intended to preserve the thymus, the organ that trains T cells to defend against threats and preserve autoimmunity. The Philadelphia-based biotech’s seed financing, led by Columbus Venture Partners, will be used to advance toward the clinic with potential therapies for immune diseases.
—March Biosciences, spun out of the Center for Cell and Gene Therapy, unveiled $28.4 million in Series A financing. Lead program MB-105 is a CAR T-therapy designed to target CD5, a protein expressed on cancerous T cells. A Phase 1 test is underway enrolling patients with refractory T cell lymphoma and leukemia. Mission BioCapital and 4BIO Capital led March Bio’s financing.
—Be Biopharma closed $82 million in financing as the cell therapy developer moves into the clinic with BE-101, a potential treatment for hemophilia B. The biotech’s therapies are made by engineering B cells to produce therapeutic proteins. Be Bio last raised money in 2022, a Series B financing that totaled $130 million.
—Terray Therapeutics, a biotech that uses generative AI to discover and develop small molecule drugs, unveiled a $120 million Series B financing. Los Angeles-based Terray will use the capital to advance internal programs into clinical trials for indications that were not disclosed. The financing was led by new investor Bedford Ridge Capital and earlier investor NVenture, the investment arm of NVIDIA. Here’s more about Terray and its technology platform, tNova, which it unveiled in 2022.
—Genetic medicines have been difficult to deliver to the kidney. Judo Bio is developing oligonucleotide drugs that target a particular receptor to reach the organ, and the Cambridge-based startup unveiled $100 million in seed and Series A financing to advance its research toward the clinic. The Series A round was co-led by Atlas Venture, TCG, and Droia Venture.
—Purespring Therapeutics, a developer of gene therapies for kidney disease, raised £80 million (about $105 million). The London-based company’s therapies target the podocyte, a special cell implicated in 60% of renal diseases. Proceeds will be used to advance lead program PS-002 into a Phase 1/2 clinical trial for immunoglobulin A nephropathy, a rare disease currently treated with chronically administered therapies. Sofinnova Partners led Purespring’s Series B financing.
—Artificial intelligence biotech company Basecamp Research revealed a $60 million Series B financing to scale its collection of data and strengthen its AI capabilities. The London-based startup also announced a multi-year collaboration with David Liu of the Broad Institute of MIT and Harvard. Basecamp said this partnership will research new approaches to programmable genetic medicines with potential applications in a range of diseases.
—City Therapeutics launched with $135 million to develop next-generation RNA interference (RNAi) drugs. The company says its engineering platform can design therapies in smaller sizes that have novel cellular mechanisms and improved potency, efficiency, and specificity. The Cambridge-based biotech, co-founded by scientists involved in the first generation of RNAi therapies, expects to enter the clinic by the end of 2025. Arch Venture Partners led City’s Series A round.
—Resolution Therapeutics raised £63.5 million to advance to Phase 1/2 testing with RTX001, an engineered autologous macrophage cell therapy that could offer anti-fibrotic and anti-inflammatory effects in patients with end-stage liver disease. The company, which maintains operations in London and Edinburgh, Scotland, said this trial will be conducted in the United Kingdom and Spain. Syncona led the Series B round, which will also support research in other inflammatory fibrotic conditions such as graft-versus-host disease and lung fibrosis.
—Triveni Bio raised $152 million to support a pipeline whose most advanced program, TRIV-573, is a bispecific antibody that blocks two targets associated with atopic dermatitis. The Watertown, Massachusetts-based biotech aims to file an investigational new drug application for this program in the first quarter of 2025. Triveni launched last year supported by a $92 million Series A financing. Goldman Sachs Alternatives led the company’s Series B.
—Kailera Therapeutics launched with $400 million to support its GLP-1 and GIP receptor agonist drugs for metabolic indications, including obesity. Kailera’s four programs were licensed from China-based Jiangsu Hengrui Pharmaceuticals. The Series A financing was co-led by Atlas Venture, Bain Capital Life Sciences, and RTW Investments.
—Radiopharmaceutical developer Aktis Oncology unveiled $175 million in financing to support development of a pipeline led by AKY-1189, an alpha radiotherapy that targets Nectin-4, a tumor-associated antigen found in a range of solid tumors. The Series B round was led by RA Capital Management and co-led by RTW Investments and Janus Henderson Investors. Boston-based Aktis emerged from stealth in 2021 backed by $72 million in Series A financing.
—Genespire raised €46.6 million (about $52 million) to advance to Phase 1/2 testing with GENE202, an in vivo gene therapy in development for methylmalonic acidemia, a rare inherited disorder that impairs the metabolism of certain amino acids and fats. The Milan, Italy-based startup’s Series B round was co-led by Sofinnova Partners, XGEN Venture, and CDP Venture Capital.
—Vaccines developer Vicebio unveiled $100 million in financing as it begins a Phase 1 test of VXB-241, a bivalent vaccine designed to address both respiratory syncytial virus (RSV) )and human metapneumovirus (hMPV). Data are expected in mid-2025. The next Vicebio program is VXB-251, a trivalent vaccine for RSV, hMPV, and parainfluenza virus 3. The London-based company’s Series B round was led by TCGX.
—GC Therapeutics launched with $65 million in financing. The biotech’s next-generation cell therapies come from a platform technology called TFome, which programs induced pluripotent stem cells. GC’s initial therapeutic areas of focus include gastrointestinal, neurological, and immunological diseases. Cormorant Asset Management led Cambridge, Massachusetts-based biotech’s Series A financing.
—Neuroscience startup Nura Bio extended its Series A financing by $68 million to proceed to Phase 2 testing with an oral small molecule designed to block SARM1, an enzyme associated with axonal damage. It faces potential competition from Eli Lilly, which is in early clinical development with a drug that goes after the same target. Nura Bio’s founding investor The Column Group led the startup’s new financing.
—F2G raised $100 million for olorofim, which is in late-stage development to treat aspergillosis and other invasive fungal infections. Olorofim is from a novel class of antifungal agents that work by inhibiting the pyrimidine synthesis pathway. The cash will enable the Manchester, U.K.-based company to complete late-stage clinical development, submit regulatory applications, and prepare for U.S. commercialization of the drug. The new financing was led by new investor AMR Action Fund and co-led by ICG.
—T cell engagers first reached patients as cancer treatments. Candid Therapeutics aims to bring such drugs to autoimmune disorders, and its efforts are backed by more than $370 million in financing. Candid’s drug candidates came from acquiring and merging two biotechs, Vignette Bio and TRC 2004. The Candid pipeline includes two T cell engagers for cancer now being repositioned for development in autoimmune diseases. These therapies are designed to selectively deplete B cells that drive disease.
—Startup creator Flagship Pioneering unveiled its newest company, Mirai Bio. Mirai’s platform technology is applied to the development of genetic medicines for the company’s partners working across a range of therapeutic areas and therapeutic modalities. It says its platform technology unlocks delivery of a drug to any tissue and cell type, optimize design of the drug cargo, and facilitates manufacturing. Like other startups that come from Flagship, Mirai is backed by the customary $50 million in financing.
—Superluminal Medicines, a company developing small molecule drugs that target elusive G protein-coupled receptors (GPCRs), closed $120 million in financing. The Boston-based startup says its drugs target membrane receptors that mediate cell signaling and response processes fundamental to human physiology. These small molecule come from a generative biology and chemistry platform technology. The new capital will be used to advance toward the clinic in undisclosed indications. RA Capital Management led the Series A financing.
—Riding strong investor interest in metabolic disorder drugs, OrsoBio closed $67 million to advance a pipeline that includes programs for type 2 diabetes, obesity, and the fatty liver disease MASH. The Menlo Park, California-based startup’s drugs address pathways associated with energy metabolism. The Series B round, led by Ascenta Capital and Woodline Partners, comes less than a year after the company unveiled $60 million in Series A financing.
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