Publication in Cancer Research Details Atebimetinib’s Broad, Durable Preclinical Activity and Favorable Tolerability Across RAS- and RAF-Mutant Tumors via Deep Cyclic Inhibition

On July 21, 2026 Immuneering Corporation (Nasdaq: IMRX), a late-stage clinical oncology company focused on keeping cancer patients alive and helping them thrive, reported the publication of new findings in Cancer Research, a leading peer-reviewed journal of the American Association for Cancer Research (AACR) (Free AACR Whitepaper), characterizing the differentiated mechanism and broad preclinical activity of atebimetinib.

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The article, "Dual-MEK Inhibitor Atebimetinib Displays Broad Activity in RAS- and RAF-Mutant Tumors via Deep Cyclic Inhibition and Resisting RAF-Bypass," (Kolitz et al., Cancer Research, doi.org/10.1158/0008-5472.CAN-25-4907) reports that atebimetinib demonstrated broad antitumor activity across RAS- and RAF-mutant models while resisting RAF-mediated bypass signaling, a key mechanism associated with resistance to other MEK inhibitors. Because the activity observed spanned a range of KRAS, NRAS, and BRAF alterations, the findings support the potential of atebimetinib to address RAS- and RAF-mutant cancers broadly — including the majority of RAS-mutant tumors that are not addressed by currently available mutation-selective inhibitors.

"Atebimetinib was deliberately designed to overcome the historical limitations of MEK inhibition, including the toxicity that comes with chronic MAPK pathway suppression, and the RAF-mediated pathway reactivation that has limited the durability of pathway suppression, particularly in RAS-mutant disease," said Brett Hall, Ph.D., Chief Scientific Officer of Immuneering. "The new findings noted in the Cancer Research article underscore the scientific basis for our Deep Cyclic Inhibitor technology and the broad, mutation-agnostic, durable activity we observed across RAS- and RAF-mutant models, reinforcing atebimetinib’s position as a differentiated, modern MEK inhibitor."

The article describes how atebimetinib combines a novel dual-MEK mechanism with a short half-life designed to achieve Deep Cyclic Inhibition (DCI) of the MAPK pathway. Unlike other MEK inhibitors that chronically suppress signaling and are prone to RAF-mediated bypass, atebimetinib was shown to produce profound but transient inhibition of MAPK signaling followed by recovery periods that allow normal tissue to rest between doses – an approach designed to improve tolerability while maintaining antitumor activity.

Key findings include:

Atebimetinib demonstrated potent inhibition of both pERK and pMEK across multiple KRAS-, NRAS-, and BRAF-mutant tumor models, including colorectal, lung, and melanoma models.
Whereas other MEK inhibitors reduced pERK but allowed pMEK to accumulate — the molecular signature of RAF-mediated pathway reactivation — atebimetinib reduced both pERK and pMEK, reflecting its resistance to CRAF-mediated bypass.
Atebimetinib’s short half-life enabled deep cyclic inhibition of the MAPK pathway, characterized by deep suppression during peak exposure followed by recovery toward physiologic baseline signaling between doses.
In multiple head-to-head in vivo studies, atebimetinib demonstrated greater depth and durability of tumor growth inhibition than the FDA-approved MEK inhibitor binimetinib across KRAS-, NRAS-, and BRAF-mutant tumor models while remaining well tolerated.
In the Colon-26 model, a syngeneic colon-carcinoma model widely used to study cancer cachexia, atebimetinib-treated animals maintained body weight near baseline (within approximately 5%) through roughly two weeks of dosing, while untreated control animals lost a median of more than 20% of body weight by approximately day 14. Across the in vivo models more broadly, atebimetinib-treated mice maintained body weight within a median of 3-5% over up to four weeks of chronic dosing.

Immuneering is currently recruiting patients in MAPKeeper 301 (NCT07562152), a global randomized Phase 3 pivotal trial evaluating atebimetinib plus mGnP versus standard-of-care gemcitabine/nab-paclitaxel in first-line metastatic pancreatic cancer. In the second half of the year, the company expects to dose the first patient in a Phase 2 trial of atebimetinib plus Libtayo (cemiplimab) in patients with first-line RAS-mutant non-small cell lung cancer.

(Press release, Immuneering, JUL 21, 2026, View Source [SID1234669353])

Junshi Biosciences Announces Acceptance of the Supplemental Application for Toripalimab plus Chemotherapy as Perioperative Treatment for Resectable Stage Ⅱ-Ⅲ NSCLC

On July 21, 2026 Shanghai Junshi Biosciences Co., Ltd (Junshi Biosciences, HKEX: 1877; SSE: 688180), a leading innovation-driven biopharmaceutical company dedicated to the discovery, development, and commercialization of novel therapies, reported that the supplemental application for toripalimab in combination with platinum-containing chemotherapy as perioperative treatment and subsequent monotherapy as adjuvant therapy for the treatment of adult patients with resectable stage II-III non-small cell lung cancer (NSCLC) has been accepted by the National Medical Products Administration (NMPA). The supplemental application expands toripalimab’s indication from adult patients with resectable stage IIIA-IIIB NSCLC to adult patients with resectable stage II-III NSCLC.

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Lung cancer is a malignant tumor with the highest prevalence and mortality rate in the world. According to data released by the National Clinical Research Center for Cancer, in 2024, there were approximately 1.18 million new lung cancer cases and 0.74 million lung cancer deaths in China, accounting for 22.83% of all new cancer cases and 28.79% of all cancer deaths in the nation. Amongst these cases, 20%-25% were surgically resectable at first diagnosis, but even after radical surgical treatment, 30%-55% of the patients suffered from post-surgical recurrence and death. Radical surgery in combination with chemotherapy is one way to prevent recurrence, but chemotherapy, as preoperative neoadjuvant or postoperative adjuvant therapy, has limited clinical benefits and can only improve the 5-year survival rate by around 5%.

Immunotherapy, with PD-(L)1 inhibitors at the forefront, has been transforming the landscape of cancer treatment. It has long-term effects in terms of tumor control and/or elimination by relieving the immune suppression of tumor cells and reactivating the patients’ own immune cells to kill cancer. Many local and international lung cancer treatment guidelines recommend PD-(L)1 inhibitors as one of the standard perioperative treatments for resectable stage II-III NSCLC.

The supplemental application is principally based on NEOTORCH (NCT04158440), a randomized, double-blind, placebo-controlled phase 3 clinical study aiming to compare the efficacy and safety of toripalimab or placebo in combination with chemotherapy as perioperative treatment for resectable stage II/III NSCLC patients. Led by principal investigator Professor Shun LU of Shanghai Chest Hospital, School of Medicine, Shanghai Jiao Tong University, the study enrolled a total of 501 patients with resectable stage II-III NSCLC. The primary endpoints are event-free survival (EFS) in patients with stage III and stage II-III disease as assessed by researchers, and major pathological response (MPR) rate in patients with stage III and stage II-III disease as assessed by the Blind Independent Pathology Review Committee (BIPR). The secondary endpoints include overall survival (OS), EFS as assessed by the Independent Review Committee (IRC), pathological complete remission rate (pCR rate), disease-free survival (DFS) and safety.

In January 2023, the EFS interim analysis of patients with resectable stage III NSCLC of NEOTORCH met the primary endpoint. The study results were presented through oral presentation at the April 2023 session of the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Plenary Session and the 2023 ASCO (Free ASCO Whitepaper) Annual Meeting. NEOTORCH was the world’s first phase 3 clinical study of an anti-PD-1 monoclonal antibody for NSCLC perioperative treatment (including neoadjuvant and adjuvant) with positive EFS results published in the Journal of the American Medical Association (JAMA) in January 2024.

The results showed that compared to perioperative chemotherapy alone, toripalimab in combination with chemotherapy as perioperative treatment led to a significant improvement in EFS (median EFS: not reached vs. 15.1 months, P<0.001), reduced risk of disease recurrence, progression events or death by 60% (HR=0.40, 95% CI: 0.28-0.57). Meanwhile, the OS in the toripalimab in combination with chemotherapy group showed a clear trend toward improved outcomes (HR=0.62, 95% CI: 0.38-1.00). Moreover, toripalimab in combination with chemotherapy as perioperative treatment increased the pCR rate to nearly 25-fold (pCR rate: 24.8% vs. 1.0%) and the MPR rate to nearly 6-fold (MPR rate: 48.5% vs. 8.4%).

In December 2023, based on the NEOTORCH interim analysis results, the supplemental new drug application for the new indication of toripalimab in combination with platinum-containing doublet chemotherapy for perioperative treatment of resectable stage IIIA-IIIB NSCLC patients was approved by the NMPA. It was the first domestically approved perioperative therapy for lung cancer in China, and the second worldwide.

In May 2026, the NEOTORCH finished the final analysis. The primary endpoints of EFS and MPR rate in the stage II-III population, as well as the MPR rate in the stage III population, met the pre-defined efficacy boundary.

In July 2026, the full results of a post hoc analysis of surgical outcomes from the NEOTORCH of toripalimab in combination with chemotherapy for perioperative treatment of resectable stage III NSCLC patients were officially published in JAMA Surgery, a leading international journal in the field of surgery. The analysis focused on stage III NSCLC patients who underwent surgery in the NEOTORCH and systematically evaluated the effects of toripalimab in combination with chemotherapy as perioperative treatment on surgical feasibility, complications, survival and other outcomes.

The results demonstrated that toripalimab in combination with chemotherapy significantly reduced the surgery cancellation rate (17.8% vs. 26.7%; p=0.03), thereby enabling more patients to undergo surgical resection without increasing perioperative risks or giving rise to any new safety signals. Among the 314 patients who completed surgery, compared with placebo in combination with chemotherapy, toripalimab in combination with chemotherapy effectively achieved higher rates of tumor downstaging and lymph node downstaging (tumor downstaging rate: 80.7% vs. 50.7%, lymph node downstaging rate: 67.5% vs. 48.6%), and improved the EFS benefit of the patients (HR=0.50, 95% CI: 0.33-0.74; p<0.001). Among the patients who achieved tumor downstaging or lymph node downstaging, toripalimab in combination with chemotherapy significantly improved EFS compared with placebo in combination with chemotherapy (HR=0.45 for both, p=0.002 and p=0.009).

About Toripalimab

Toripalimab is an anti-PD-1 monoclonal antibody developed for its ability to block PD-1 interactions with its ligands, PD-L1 and PD-L2, and to induce PD-1 receptor internalization (endocytosis function). Blocking PD-1 interactions with PD-L1 and PD-L2 promotes the immune system’s ability to attack and kill tumor cells.

More than forty company-sponsored toripalimab clinical studies covering more than fifteen indications have been conducted globally by Junshi Biosciences, including in China, the United States, Europe and Southeast Asia. Ongoing or completed pivotal clinical trials evaluating the safety and efficacy of toripalimab cover a broad range of tumor types, including cancers of the lung, nasopharynx, esophagus, stomach, bladder, breast, liver, kidney, and skin.

In the Chinese mainland, toripalimab was the first domestic anti-PD-1 monoclonal antibody approved for marketing (approved in China as TUOYI). Currently, there are twelve approved indications for toripalimab in the Chinese mainland:

unresectable or metastatic melanoma after failure of standard systemic therapy;

recurrent or metastatic nasopharyngeal carcinoma (NPC) after failure of at least two lines of prior systemic therapy;

locally advanced or metastatic urothelial carcinoma (UC) that failed platinum-containing chemotherapy or progressed within 12 months of neoadjuvant or adjuvant platinum-containing chemotherapy;

in combination with cisplatin and gemcitabine as the first-line treatment for patients with locally recurrent or metastatic NPC;

in combination with paclitaxel and cisplatin in first-line treatment of patients with unresectable locally advanced/recurrent or distant metastatic esophageal squamous cell carcinoma (ESCC);

in combination with pemetrexed and platinum as the first-line treatment in EGFR mutation-negative and ALK mutation-negative, unresectable, locally advanced or metastatic non-squamous non-small cell lung cancer (NSCLC);

in combination with chemotherapy as perioperative treatment and subsequently with monotherapy as adjuvant therapy for the treatment of adult patients with resectable stage IIIA-IIIB NSCLC;

in combination with axitinib for the first-line treatment of patients with medium to high risk unresectable or metastatic renal cell carcinoma (RCC);

in combination with etoposide plus platinum for the first-line treatment of extensive-stage small cell lung cancer (ES-SCLC);

in combination with paclitaxel for injection (albumin-bound) for the first-line treatment of recurrent or metastatic triple-negative breast cancer (TNBC);

in combination with bevacizumab for the first-line treatment of unresectable or metastatic hepatocellular carcinoma (HCC) patients;

first-line treatment for unresectable or metastatic melanoma;

in combination with disitamab vedotin for the first-line treatment of HER2-expressing UC.

The first 12 indications have been included in the National Reimbursement Drug List (NRDL) (2025 Edition). Toripalimab is the only anti-PD-1 monoclonal antibody included in the NRDL for the treatment of melanoma, RCC and TNBC. Toripalimab for the treatment of advanced NPC and ESCC was approved in Hong Kong SAR, China.

Internationally, toripalimab has been approved for marketing in nearly 50 countries and regions including the United States, the European Union, India, the United Kingdom, Australia, Singapore, Malaysia and South Africa, and is also under review for marketing in various countries and regions worldwide.

(Press release, Shanghai Junshi Bioscience, JUL 21, 2026, View Source [SID1234669352])

Adicet Bio to Participate in Fireside Chat at Canaccord Genuity 46th Annual Growth Conference

On July 21, 2026 Adicet Bio, Inc. (Nasdaq: ACET), a clinical stage biotechnology company discovering and developing allogeneic gamma delta T cell therapies for autoimmune diseases and cancer, reported that Chen Schor, President and Chief Executive Officer, will participate in a fireside chat at the Canaccord Genuity 46th Annual Growth Conference being held from August 11-13, 2026, in Boston.

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Details of the event are as follows:
Date: Tuesday, August 11, 2026
Time: 10:30 a.m. ET

The live audio webcast can be accessed on the Investors section of Adicet Bio’s website at View Source An archived replay will be available for 30 days following the presentation.

(Press release, Adicet Bio, JUL 21, 2026, View Source [SID1234669351])

AdvanCell to Present Updated Phase 1b Results from the TheraPb Trial at ESMO Congress 2026

On July 21, 2026 AdvanCell, a clinical-stage radiopharmaceutical company developing innovative targeted alpha therapies for cancer, reported that updated clinical results from the Phase 1b TheraPb trial (NCT05720130) evaluating 212Pb-ADVC001 in patients with PSMA-positive metastatic castration-resistant prostate cancer (mCRPC) have been accepted for presentation at the European Society for Medical Oncology (ESMO) (Free ESMO Whitepaper) Congress 2026, held October 23–27, 2026, in Madrid, Spain.

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The presentation will include updated results from the dose-escalation portion of the TheraPb study. The data represents the first long-term follow-up of a targeted alpha therapy study employing a novel design escalating both administered activities and dose schedules, supporting the recommended Phase 2 dose and regimen. The presentation builds on previously reported encouraging Phase 1b data and supports the continued clinical development of 212Pb-ADVC001, currently enrolling Phase 2 evaluating a novel dosing regimen of intensified induction and adaptive dosing strategies.

ESMO 2026 Presentation Details

Title: Updated Results from the TheraPb Trial Defining the Recommended Phase 2 Dose (RP2D) of 212Pb-ADVC001 in PSMA-Positive Metastatic Castration-Resistant Prostate Cancer (mCRPC)

Presentation Number: 2253P

Presentation Type: Poster Presentation

Location: Madrid, Spain

Date/Time: 23 October 2026 / 3:15 – 4:00 PM CET

(Press release, Advancell, JUL 21, 2026, View Source [SID1234669350])

Pilatus Biosciences Announces Hong Kong Clinical Trial Application Approval for PLT012 and Expansion into Hong Kong

On July 21, 2026 Pilatus Biosciences, Inc., a clinical-stage biopharmaceutical company developing novel metabolic checkpoint immunotherapies for liver and gastrointestinal cancers, reported that the Hong Kong Department of Health has granted the Certificate for Clinical Trial / Medicinal Test for lead investigational therapy, PLT012 in patients with advanced solid tumors.

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The study will be conducted at the Phase I Clinical Trial Centre, under the Department of Clinical Oncology of The Chinese University of Hong Kong. The regulatory approval authorizes Pilatus to initiate a clinical trial evaluating PLT012 in Hong Kong, and represents an important milestone in advancing the Company’s global clinical development program to advance the novel therapy for patients with advanced solid tumors, including liver cancer and gastrointestinal cancers.

Pilatus also announced the establishment of its Hong Kong subsidiary, expanding its presence in one of Asia’s leading biotechnology and clinical-research hubs. The company has worked closely with Invest Hong Kong (InvestHK) to establish its regional operations and plans to leverage Hong Kong’s growing life sciences ecosystem to support clinical development, academic and strategic collaborations, and engagement with regional investment opportunities.

"We are pleased to receive CTA approval, which enables the PLT012 clinical study to commence in Hong Kong. We look forward to working with the study team to evaluate the safety and clinical potential of this investigational therapy in patients with advanced solid tumors," said Dr. Stephen Chan, principal study investigator and clinical professor at the Department of Clinical Oncology of The Chinese University of Hong Kong.

"We are pleased to establish our presence in Hong Kong as we continue executing our global development strategy," said Raven Lin, CEO & Co-founder, Pilatus Biosciences. "Hong Kong offers a world-class clinical research environment, a strong regulatory framework, and a growing biotechnology ecosystem. We appreciate the support of InvestHK and look forward to becoming an active participant in Hong Kong’s innovation ecosystem while advancing PLT012 toward the clinic."

PLT012 is a first-in-class therapeutic targeting CD36, a key regulator of metabolic dysfunction and inflammation. The program is being developed for indications where modulation of CD36 has the potential to improve patient outcomes.

The establishment of Pilatus’ Hong Kong operations strengthens the Company’s presence in Asia, enabling deeper regional collaborations, accelerating clinical development, and expanding engagement with investors and strategic partners.

About PLT012

PLT012 is a humanized monoclonal antibody designed to selectively block CD36-mediated lipid uptake, a key mechanism driving immunosuppression and immune exclusion within the tumor microenvironment. By targeting lipid metabolism, PLT012 exerts a unique mechanism of action: it depletes immunosuppressive cell populations, including Tregs and pro-tumor macrophages, while simultaneously enhancing antitumor activities of intratumoral NK cell and cytotoxic CD8+ T cell that are otherwise susceptible to lipid-induced exhaustion. In preclinical studies, PLT012 has demonstrated potent monotherapy efficacy in models of liver malignancies, with a favorable safety profile across species. Leveraging its distinct mechanism of action, PLT012 further acts as a potent sensitizer in combination with anti–PD-L1 therapies, effectively overcoming drug resistance in immune "cold" tumors and liver metastases.

(Press release, Pilatus Biosciences, JUL 21, 2026, View Source [SID1234669349])