On October 5, 2026 Guardant Health, Inc. (Nasdaq: GH), a leading precision oncology company, reported Cancer Research Communications, a journal of the American Association for Cancer Research (AACR) (Free AACR Whitepaper), has published results from the COSMOS-MEL01 study (UMIN000042040). The study is the first published prospective, multicenter evaluation of the tissue-free, epigenomic Guardant Reveal blood test for molecular residual disease (MRD) detection and recurrence monitoring in patients with resected stage II–III melanoma.

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The COSMOS (COnquer Solid Malignancies by blOod Screening) program is a large prospective initiative evaluating MRD detection with the Guardant Reveal test across six cancer types. This report presents findings from COSMOS-MEL01, in which 280 longitudinal surveillance samples from 48 patients with clinical stage II–III melanoma treated with surgery were analyzed. The study found that detection of circulating tumor DNA (ctDNA) following surgery was strongly associated with recurrence and melanoma-related death. During longitudinal surveillance, Guardant Reveal detected 81% of distant recurrences, with 100% specificity in post-treatment samples from patients who remained recurrence-free. ctDNA detection preceded clinical identification of recurrence by a median of 70.5 days. These findings support the use of Guardant Reveal as a rapid, noninvasive approach for earlier identification of patients at high risk for recurrence, enabling refined treatment and surveillance strategies.

"Patients with resected, high-risk melanoma need more precise tools to assess how their risk changes after surgery and throughout surveillance," said Yoshiaki Nakamura, M.D., Ph.D., former Chief, International Research Promotion Office at National Cancer Center Hospital East in Chiba, Japan, and a co-lead author of the study. "These results show that ctDNA detection using a tissue-free assay was associated with a substantially increased risk of recurrence and melanoma-related death and often preceded clinical detection of disease. Fast, broadly accessible testing would be valuable in helping to inform therapy for patients with substantially higher risk of melanoma recurrence and poorer survival than those who remained ctDNA-negative."

"Predicting melanoma recurrence after surgery remains difficult at the individual-patient level, and conventional clinicopathologic staging provides only a static estimate of risk," said Kenjiro Namikawa, M.D., Ph.D., Chief, Department of Dermatologic Oncology at National Cancer Center Hospital in Tokyo, Japan. "Our findings suggest that serial ctDNA testing may provide a dynamic view of recurrence risk and potentially complement routine imaging, particularly in identifying patients at increased risk of distant relapse. Further studies will be important to determine whether and how ctDNA results could be incorporated into postoperative treatment and surveillance decisions."

Key study findings include:

100% specificity in samples from patients without recurrence
81% longitudinal sensitivity for distant recurrence detection
Up to 273-day lead from ctDNA detection to recurrence
"COSMOS-MEL01 extends the growing body of evidence supporting Guardant Reveal into melanoma and demonstrates the power of epigenomic MRD detection across a diverse set of melanoma subtypes," said Helmy Eltoukhy, Guardant Health chairman and co-CEO. "The ability to identify patients at very high risk shortly after surgery, and to detect molecular recurrence before it appears clinically, could help inform more personalized surveillance and clinical trial strategies. These findings also illustrate the advantages of a tissue-free approach that can deliver molecular insights without the logistical complexity of obtaining and analyzing a tumor specimen."

The incidence of melanoma is steadily rising, with annual cases projected to increase by more than 50% between 2020 and 2040. The COSMOS study provides strong evidence for the use of Guardant Reveal to improve recurrence risk stratification to inform management decisions for this significantly large patient population.

The study was published today at 10 a.m. EDT in Cancer Research Communications.

About Guardant Reveal

Guardant Reveal is a tissue-free liquid biopsy test that detects MRD and monitors recurrence in early-stage colorectal, breast, and lung cancers, helping oncologists guide treatment decisions. In addition to MRD detection, Reveal can be used for late-stage therapy response monitoring for patients with solid tumors. Guardant Reveal therapy response monitoring can be initiated at any time during a patient’s treatment journey, offering clinicians flexibility and actionable insights.

The first clinical-validation study of pan-cancer chemotherapy monitoring published in The Journal of Liquid Biopsy showed that Guardant Reveal predicts long-term patient benefit up to 18 months earlier than standard clinical measures.

(Press release, Guardant Health, OCT 5, 2026, View Source [SID1234673197])

On October 5, 2026 BlueWhale Bio, Inc., a company dedicated to transforming immune cell therapy manufacturing, reported a series of updates demonstrating continued progress across its Synecta platform. Items include new clinical and functional data supporting Synecta-manufactured CAR-T cells, the launch of Synecta T1 Enhanced to enable clinical development and expanded distribution in China and Europe.

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"We’re encouraged by the emerging clinical and functional evidence supporting our technology and seeing that progress translate into broader clinical use and access," said Peter Keller, Chief Executive Officer of BlueWhale Bio. "With Synecta grade available to support clinical development and new distribution in China and Europe, we’re building the foundation to enable more cell therapy developers to incorporate our technology into their clinical programs."

New Data Support Synecta-Manufactured CAR-T Cells

At the University of Pennsylvania, preliminary follow-up from refractory lymphoma and leukemia patients receiving Synecta-manufactured huCART19-IL18 showed measurable CAR-T exposure in all four patients at Day 100, with persistence observed through one year (more than twice as long as observed in four patients from a prior dose-matched lymphoma cohort whose CAR-T cells were manufactured using conventional bead-based activation). Three of the four patients receiving Synecta-manufactured cells achieved durable complete responses.

Building on these persistency observations, a team at Children’s Hospital of Philadelphia (CHOP) is preparing to use Synecta T1 to manufacture CAR-T cells for a study in children with relapsed acute lymphoblastic leukemia, with the goal of evaluating whether the approach could reduce the need for subsequent bone marrow transplantation.

"Synecta has delivered strong activation and high-quality cells, giving us confidence as we plan its use in a challenging population," said Stephan Kadauke, MD, PhD, Associate Director of CHOP’s Cell-Based Therapy Laboratory.

Complementing these clinical observations, single-cell imaging conducted with Applied Cells, Inc. using Celldom, Inc.’s CloneXplorer platform showed that Synecta manufacturing yielded a greater proportion of CAR-T cells capable of both serial tumor-cell killing and subsequent proliferation compared with bead-based manufacturing.

Synecta T1 Enhanced Launch Supports Bench-to-Bed Translation

BlueWhale Bio has launched Synecta T1 Enhanced, a product grade that can support the use of cell-derived nanoparticles in clinical-stage cell therapy programs. Synecta T1 Enhanced is supported by quality documentation filed in BlueWhale’s FDA Drug Master File.

BlueWhale Bio Expands Synecta Access in China and Europe

In parallel with its clinical development activities, BlueWhale Bio is expanding access to Synecta internationally. The company has appointed MineBio and Tebubio to distribute Synecta in China and Europe, respectively, providing customers in these regions with local product access and scientific support.

BlueWhale Bio to Present at Cell & Gene Meeting on the Mesa

Peter Keller will provide an update on the company’s business and development strategy at the Cell & Gene Meeting on the Mesa in Phoenix, AZ, on Tuesday, October 6, 2026, at 3:00 pm MST in FLW Ballroom G.

(Press release, BlueWhale Bio, OCT 5, 2026, View Source [SID1234673196])

On October 5, 2026 Pillar Biosciences reported the launch of the oncoReveal Myeloid v2 Panel, an expanded research-use-only (RUO) DNA next-generation sequencing (NGS) panel for myeloid malignancies. The panel expands the original oncoReveal Myeloid Panel from 58 to 80 gene targets and enhances detection of FLT3 internal tandem duplications (ITDs), including long and multiple ITDs that can be challenging for NGS assays.

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Building on the original 58-gene panel, oncoReveal Myeloid v2 adds 22 genes while retaining all prior content, giving laboratories broader, guideline-relevant coverage without disrupting existing workflows. Only 4 out of the original 766 amplicons covering the original 58 genes are changed to accommodate the expansion — a result of Pillar’s proprietary SLIMamp chemistry and VersaTile primer design tool, which together enable efficient panel scaling while preserving the validated performance of existing content. The full updated gene list will be available on pillarbiosci.com at launch.

"With oncoReveal Myeloid v2, we significantly expanded our myeloid gene content while preserving the trusted panel content laboratories already rely on," said ShiPing Zou, Senior Director, Product Management at Pillar Biosciences. "We also invested significant effort in FLT3-ITD detection so laboratories can obtain accurate, base-pair-resolved calls for long and multiple ITDs without defaulting to a separate fragment-analysis workflow."

A key advancement in oncoReveal Myeloid v2 is the ability to accurately detect long (300+ bp) and multiple FLT3 internal tandem duplications (ITDs) with 2 x 150 sequencing, a variant class that has historically challenged short-read NGS:

Why FLT3-ITDs are challenging

FLT3-ITDs occur in an estimated 20–30% of de novo AML cases and are associated with poor prognosis, making accurate detection important to the profiling of heme malignancies.
ITDs can range from a few base pairs to more than 400 bp. Their repetitive sequence content can make it difficult for short-read NGS panels to detect and size accurately, particularly longer ITDs.
Laboratories have therefore historically relied on capillary electrophoresis (CE) fragment analysis to confirm FLT3-ITD status and calculate allelic ratio (AR), adding time and complexity.
Performance with long and multiple ITDs

In an independent evaluation of 111 myeloid/MPN samples, including 23 FLT3-ITD-positive samples with ITDs from 12 bp to 279 bp, the oncoReveal Myeloid v2 Panel and PiVAT informatics accurately detected and sized ITDs using standard 2×150 bp short-read sequencing. This included ITDs up to 279 bp and 9 samples with 2–4 concurrent ITDs.
Detection of long and multiple ITDs in a single NGS run can identify distinct clonal populations, each with its own ITD length and variant allele frequency (VAF), within the same sample—detail that a single CE-based allelic ratio can obscure.
NGS-derived VAFs trended consistently with allelic ratios from orthogonal CE-based fragment analysis across evaluated ITD lengths, supporting confidence in the NGS-based calls.
FLT3-ITDs were detected to ≤1% VAF, providing researchers with a sensitive, single-workflow alternative to routing FLT3-suspected samples to separate fragment analysis.

(Press release, Pillar Biosciences, OCT 5, 2026, View Source [SID1234673195])

On October 5, 2026 HanchorBio, Inc. (TWSE: 7827), a global clinical-stage biotechnology company developing next-generation immunotherapies for oncology and immune-mediated diseases, reported that the U.S. Food and Drug Administration (FDA) has cleared the investigational new drug (IND) application for HCB303. The clearance enables HanchorBio to initiate its Phase 1 first-in-human clinical trial.

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HCB303 is HanchorBio’s second trispecific immunotherapy to enter clinical development and represents an innovative and differentiated approach to enhance immune response against cancer. A humanized trispecific fusion protein engineered via HanchorBio’s proprietary FBDB platform, HCB303 incorporates a TIGIT-Fc ligand-trap strategy within a single architecture that simultaneously targets the TIGIT/PVR, PD-L1/PD-1, and SIRPα/CD47 pathways.

Unlike conventional anti-TIGIT antibodies that primarily bind to TIGIT and block TIGIT receptor signaling, HCB303 is designed to intercept TIGIT ligands—including PVR/CD155 and CD112. By trapping these ligands, HCB303 is designed to reduce TIGIT-mediated inhibitory signaling while potentially preserving CD226 expression and associated activating signaling in T cells and NK cells. Combined with PD-L1 blockade and SIRPα-mediated enhancement of macrophage phagocytosis, HCB303 aims to coordinate complementary innate and adaptive antitumor immunity within the tumor microenvironment.

"We believe TIGIT-Fc offers a biologically superior strategy to conventional anti-TIGIT receptor blockade," said Scott Liu, PhD, Founder and Chairman of HanchorBio. "Simply blocking PVR signaling through an anti-TIGIT antibody may release the inhibitory signal, but it does not address the down-regulation of CD226, which is needed for enhanced activation of T and NK cells. HCB303 was designed to go further—intercepting immune-inhibiting TIGIT ligands and preserving the CD226 activating axis, while simultaneously blocking the PD-L1 and CD47 pathways. This is precisely the type of biology-driven therapeutic architecture our FBDB platform was built to create."

The FDA clearance follows pre-IND feedback from the agency in August 2026. HanchorBio will now proceed with its planned Phase 1 first-in-human, dose-escalation, multi-regional study (HCB303-ONC-101) in patients with advanced, relapsed, or refractory solid tumors who have no remaining standard treatment options. The study will evaluate safety, tolerability, pharmacokinetics, pharmacodynamics, immunogenicity, biomarkers, and preliminary antitumor activity.

"HCB303 is HanchorBio’s second trispecific immunotherapy to enter clinical development, and the FDA clearance moves HCB303 from a differentiated biological hypothesis into clinical testing," added Alvin Luk, PhD, MBA, President and CMO (Group) & CEO (USA) of HanchorBio. "Our priority now is to rigorously evaluate whether its differentiated TIGIT biology and coordinated engagement of innate and adaptive immunity translate into meaningful clinical benefit for patients. With HCB301 already in clinical development and HCB303 now cleared to enter the clinic, we are advancing the potential of our FBDB platform to generate mechanistically distinct multispecific therapeutics."

About HCB303

HCB303 is an investigational, humanized trispecific fusion protein developed using HanchorBio’s proprietary FBDB platform. It is designed to simultaneously modulate the SIRPα/CD47, PD-L1/PD-1, and TIGIT/PVR immune pathways, integrating macrophage, T-cell, and NK-cell antitumor immunity within a single engineered molecule.

(Press release, Hanchor Bio, OCT 5, 2026, View Source [SID1234673194])

On October 5, 2026 Genezen, a gene therapy contract development and manufacturing organization (CDMO), and InterAct Therapeutics, a gene therapy innovation organization with a proprietary platform that pinpoints cancer targets and powers anti-metastasis therapies to save lives, reported a strategic manufacturing partnership to advance the clinical development of a therapy for breast cancer liver metastases (BCLM). InterAct Therapeutics’ lead program, IAT-S2, is an AAV8-based therapy targeting hepatocytes to modulate the liver microenvironment and suppress metastatic outgrowth.

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Metastatic disease remains a leading cause of mortality in advanced solid tumors, yet few therapies specifically target the complex interactions between tumor cells and the metastatic microenvironment. IAT-S2 emerged from research in the lab of Dr. Isaac Chan, MD, PhD of UT Southwestern Medical Center, whose team was investigating how metastatic breast cancer cells interact with healthy liver cells to establish and grow within the liver. Dr. Chan then co-founded InterAct Therapeutics to move the program forward. Rather than targeting cancer cells alone, InterAct Therapeutics’ approach is to alter the biology of the metastatic environment to eliminate metastatic growth. Liver metastases are common among patients with metastatic breast cancer, with median survival of just two to three years following diagnosis. InterAct Therapeutics is developing a one-time, disease-modifying gene therapy designed to address the tumor-liver microenvironment, for which there are currently no specifically approved therapies.

InterAct Therapeutics selected AAV8 as the delivery vector for IAT-S2 based in part on its ability to efficiently target hepatocytes, enabling a liver-directed approach to the treatment of metastatic disease. In preclinical studies, InterAct Therapeutics observed near elimination of the liver metastases across five models of liver metastasis in mice.

Following positive FDA INTERACT feedback, InterAct Therapeutics is now preparing for IND-enabling studies with manufacturing support from Genezen’s experienced viral vector team at its state-of-the-art facility in Indianapolis. Genezen will provide its platform AAV process development, scale-up, and GMP manufacturing expertise to support toxicology studies and the production of clinical material for a Phase 1 trial. The collaboration will support InterAct Therapeutics as it advances IAT-S2 toward IND submission and first-in-human clinical development.

"As a physician, I am concerned when metastatic breast cancer spreads to the liver, as these are among the patients I worry about the most. As a scientist, I’ve dedicated my work to understanding why these metastases are so difficult to treat and finding a fundamentally different way to approach them," said Dr. Isaac Chan, MD, PhD, Chief Scientific Officer and Co-founder of InterAct Therapeutics. "This partnership is an important step toward translating a discovery that began in our lab into a potential therapy for patients. Announcing this partnership during Breast Cancer Awareness Month is especially meaningful as we move beyond awareness toward the progress patients are waiting for."

"Genezen was built to help innovators translate promising science into therapies that can make a meaningful difference for patients," said Steve Favaloro, Chairman and Chief Executive Officer of Genezen. "We are proud to bring our deep AAV development and manufacturing expertise to this partnership and work alongside InterAct Therapeutics to help move this program forward and make an impact in the oncology space. Collaborations like this embody what drives our team every day: scientific excellence, urgency for patients and a solutions-driven commitment to our partners as we work together to bring the next generation of therapies to life."

InterAct Therapeutics selected Genezen following an evaluation of manufacturing partners, citing the company’s AAV experience, reputation, reliability and ability to support the program’s critical development timeline. The partnership builds on Genezen’s deep technical experience in AAV development and manufacturing, including its experience manufacturing a commercially approved AAV gene therapy, and positions the companies to scale manufacturing as IAT-S2 progresses through clinical development.

(Press release, Genezen, OCT 5, 2026, View Source [SID1234673193])