TiumBio Presents Phase 1b Interim Results for TU2218 in Combination with Pembrolizumab at ASCO 2024 Annual Meeting

On June 1, 2024 TiumBio Co., Ltd. (Kosdaq: 321550), a clinical-stage biopharmaceutical company focused on discovering and developing innovative therapeutics for patients with rare and incurable diseases, reported interim results from the Phase 1b clinical trial of TU2218 in combination with pembrolizumab at the 2024 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting (Press release, TiumBio, JUN 2, 2024, View Source [SID1234643955]).

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TU2218 is a novel oral dual inhibitor targeting transforming growth factor beta receptor 1 (TGFR1) and vascular endothelial growth factor receptor 2 (VEGFR2). TGF-ß and VEGF pathways in tumor microenvironment interfere with the anti-tumor activity of immune checkpoint inhibitors, so TU2218 is expected to maximize the efficacy of immuno-therapies by inhibiting them.

TiumBio’s ongoing Phase 1b clinical trial (NCT05784688) in the United States evaluates safety, pharmacokinetics, and preliminary efficacy of TU2218 in combination with Keytruda (pembrolizumab) in patients with advanced solid tumors. The study consists of three dosage groups (105 mg, 150 mg, and 195 mg/day), and the presentation at the ASCO (Free ASCO Whitepaper) Annual Meeting included results from 12 patients across the three cohorts. Data from the full Phase 1b trial, which includes 18 patients, will be available in the second half of 2024.

In the poster released at the 2024 ASCO (Free ASCO Whitepaper) Annual Meeting, five patients treated at the recommended phase 2 dose (RP2D) of 195mg/day TU2218 in combination with pembrolizumab demonstrated an ORR of 40% at PR (n=2) and 60% at SD (n=3) with a DCR of 100%. And across all dosage groups, patients (n=12) receiving the combination therapy showed PR at 16.7% (n=2), SD at 50.0% (n=6) and PD at 25.0% (n=3). In this study, TU2218 was well-tolerated as a combination therapy with pembrolizumab, showing no signs of DLTs, which is consistent with a previous monotherapy trial.

"We are encouraged by the preliminary efficacy results with a favorable safety profile in patients with advanced tumors and are looking forward to top-line data from the study, which is expected in the second half of this year," said Hun-Taek Kim, Ph.D., MBA, CEO at TiumBio. "We plan to initiate a Phase 2a clinical trial in head and neck cancer, biliary tract cancer, and colorectal cancer to develop an innovative novel drug for patients with limited treatment options," he added.

GenFleet Therapeutics Announces Efficacy & Safety Result from Phase II Trial for First-line NSCLC Treatment in KROCUS Study, fulzerasib (KRAS G12C Inhibitor) in Combination with cetuximab, in a Late-breaking Abstract at the Oral Presentation of 2024 ASCO Annual Meeting

On June 2, 2024 GenFleet Therapeutics, a clinical-stage biotechnology company focusing on cutting-edge therapies in oncology and immunology, reported the phase II trial data of KROCUS Study, fulzerasib (GFH925, KRAS G12C inhibitor) in combination with cetuximab for first-line non-small cell lung cancer (NSCLC) treatment,at the 2024 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) annual meeting (Press release, GenFleet Therapeutics, JUN 2, 2024, View Source;safety-result-from-phase-ii-trial-for-first-line-nsclc-treatment-in-krocus-study-fulzerasib-kras-g12c-inhibitor-in-combination-with-cetuximab-in-a-late-breaking-abstract-at-the-oral-p-302161182.html [SID1234643952]).

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The preliminary result of the trial was accepted as a late-breaking abstract and selected for oral presentation at the clinical science symposium of lung cancer treatment, highlighting the combination therapy’s promising efficacy and its excellent safety/tolerability profile. Notably, this marks the first time that a KRAS G12C inhibitor is combined with an EGFR inhibitor as a first-line NSCLC treatment with its data presented at a global academic event.

The KROCUS Study, led by renowned lung cancer expert Dr. Rafael Rosell, is a European multi-center phase Ib/II study initiated in March 2023. As of April 19 this year, a total of 40 subjects were enrolled and 33 of them received at least one available post-treatment tumor assessment: the objective response rate (ORR) reached 81.8% and the disease control rate (DCR) reached 100%. The post-treatment evaluation revealed that most patients (27/33) exhibited tumor response: one patient achieved complete response; the other two achieved partial response with a shrinkage in their tumor size by 100%.

Additionally, the combination therapy demonstrated a favorable safety/tolerability profile, with both treatment-related adverse events (TRAEs) and TRAEs above grade 3 occurring at a lower rate than those in the fulzerasib monotherapy study in second line and above NSCLC. The data was presented by Dr. Vanesa Gregorc from Italy’s Candiolo Cancer Institute, Italy.

The new drug application for fulzerasib monotherapy in treating advanced KRAS G12C-mutant NSCLC has been accepted and granted priority review designation by China’s National Medical Products Administration (NMPA). Based on the data presented at 2023 ESMO (Free ESMO Whitepaper) Asia, the registrational phase II study of GFH925 monotherapy for NSCLC showed an ORR of 46.6% and a DCR of 90.5%; the median progression-free survival (mPFS) was 8.3 months. In addition, fulzerasib monotherapy received two breakthrough designations for advanced G12C-mutant NSCLC and metastatic colorectal cancer (CRC) patients.

"I am delighted that the preliminary data of this phase II trial was selected for oral presentation at ASCO (Free ASCO Whitepaper), an acknowledgement of this innovative combination therapy’s potential in treating NSCLC patient in a of first-line setting. Currently, there are multiple global trials exploring the combination of KRAS G12C and EGFR inhibitors for later-line CRC. However, GenFleet is propelling the validation of this synergistic mechanism further into first-line treatment for NSCLC, the cancer type with the largest G12C-mutant patient population. We eagerly anticipate the trial’s continued progress, aiming to offer more frontline options for patients worldwide. "said Dr. Rafael Rosell, the principal investigator of KROCUS study.

"The design of the KROCUS Study is based on deep research into synergistic mechanisms, animal models validation, as well as clinical data generated from the fulzerasib monotherapy in the second-line setting. We are excited to see that the preliminary data from our first-line combination study exceeding our expectation. Furthermore, this chemo- and immuno-free combination could potentially mitigate overlapped toxicities and delay drug resistance, leaving space to allow later-line immunotherapy to extend the patients’ overall survival." stated by Yu Wang, M.D.,Ph.D., Chief Medical Officer of GenFleet.

KROCUS: a Phase II study investigating the efficacy and safety of fulzerasib (GFH925) in combination with cetuximab in patients with previously untreated advanced KRAS G12C mutated NSCLC
Presenter: Dr. Vanesa Gregorc
Abstract No. : LBA8511

A total of 40 treatment naïve advanced KRAS G12C positive NSCLC patients were treated with GFH925 in combination with cetuximab (fulzerasib 600mg BID + cetuximab 500 mg/m2 Q2W) as of April 19, 2024. Most patients (95%) were diagnosed with stage IV disease and 13 (32.5%) patients with brain metastases.

Efficacy: As of cutoff date, of the 33 patients who received at least one post-treatment tumor assessment, investigator-assessed ORR was 81.8% (95% CI: 64.5, 93.0) and DCR was 100% (95% CI: 89.4, 100); ORR among patients with brain metastasis was 70%. The median duration of response (DoR) was not reached yet and 88% of patients were still on treatment with a median follow-up of 5.1 months.

Safety: As of cutoff date, the combination therapy was well tolerated. Treatment-related adverse events (TRAEs) occurred in 87.5% of subjects and the majority of the TRAEs were grade 1-2. About 17.5% of subjects reported grade 3 TRAEs. There were no grade 4-5 TRAEs. No new safety signals were identified compared with fulzerasib or cetuximab as single agent.

About KROCUS Study and fulzerasib (GFH925)
The multi-center study of fulzerasib in combination with cetuximab started in scores of clinical research centers worldwide from March 2023 and sets its objectives to evaluate the safety/tolerance, efficacy and the pharmacokinetic characteristics of the combination in advanced NSCLC patients harboring KRAS G12C mutation.

Fulzerasib the first China-developed KRAS G12C inhibitor that has its NDA submission accepted and granted with Priority Review Designation by NMPA. Fulzerasib also received Breakthrough Therapy Designations this year for treating advanced KRAS G12C-mutant NSCLC patients that have received at least one systemic therapy and CRC patients who have received at least two systemic therapies.

RAS protein family can be divided into KRAS, HRAS and NRAS categories. KRAS mutations are detected in nearly 90% of pancreatic cancer, 30-40% of colon cancer, and 15-20% lung cancer patients. The occurrence of KRAS G12C mutation subset is more frequently observed than those with ALK, ROS1, RET and TRK 1/2/3 mutations combined. GFH925 is a novel, orally active, potent KRAS G12C inhibitor designed to effectively target the GTP/GDP exchange, an essential step in pathway activation, by modifying the cysteine residue of KRAS G12C protein covalently and irreversibly. Preclinical cysteine selectivity studies demonstrated high selectivity of fulzerasib towards G12C. Subsequently, fulzerasib effectively inhibits the downstream signal pathway to induce tumor cells’apoptosis and cell cycle arrest.

Sunvozertinib’s Global Pivotal WU-KONG1B Study Meets Primary Endpoint in Non-Small Cell Lung Cancer with EGFR Exon 20 Insertion Mutations

On June 2, 2024 Dizal (SSE:688192), a biopharmaceutical company committed to developing novel medicines for the treatment of cancer and immunological diseases, reported the latest data from the inaugural global pivotal study WU-KONG1 Part B (WU-KONG1B) of sunvozertinib in relapsed or refractory non-small cell lung cancer (NSCLC) with epidermal growth factor receptor (EGFR) exon 20 insertion mutations (exon20ins) at the 2024 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting (Press release, Dizal Pharma, JUN 2, 2024, View Source [SID1234643947]). The study demonstrated statistically significant outcomes on the primary endpoint for sunvozertinib and highlighted its significant clinical value to patients around the globe.

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As a rationally designed, oral, potent EGFR inhibitor targeting a wide spectrum of EGFR mutations with wild-type EGFR selectivity, sunvozertinib was previously granted Breakthrough Therapy designations by both the US FDA and the China Center for Drug Evaluation (CDE) in treating NSCLC with EGFR exon20ins. Sunvozertinib has obtained conditional approval in China through a phase II pivotal study (WU-KONG6), making it the world’s first and only oral drug for the treatment of NSCLC patients with EGFR exon20ins.

WU-KONG1B, a multinational pivotal study, is the equivalent study with a similar design of WU-KONG6 to investigate sunvozertinib in relapsed or refractory NSCLC patients with EGFR exon20ins from 10 countries and regions in Asia, Europe, North America, and South America. The primary endpoint and key secondary endpoint were independent review committee (IRC) assessed objective response rate (ORR) and duration of response (DoR) respectively.

As of March 22, 2024, a total of 111 patients were enrolled to receive sunvozertinib treatment at 300mg as the optimal recommended phase 2 dose (RP2D). 107 patients who met the full analysis set (FAS) definition were included in efficacy analysis, of which Asian, White, and Black or African American enrollees were 57.9%, 40.2% and 1.9%, respectively. The key findings of the primary analysis were as follows:

Per IRC assessment, sunvozertinib achieved a best ORR of 53.3%.
The median DoR has not been reached, and the 9-month DoR rate was 57%, indicating durable efficacy of sunvozertinib.
Anti-tumor efficacy was observed regardless of amivantamab treatment. The best ORRs in patients with or without prior amivantamab treatment were 50% and 53.8%, respectively.
Sunvozertinib was well tolerated with a favorable safety profile consistent with previous reports.
"The WU-KONG1B study is significant in that it enrolled more than 40% of non-Asian patients. On a global scale, sunvozertinib demonstrated potent and durable anti-tumor efficacy with a best ORR of 53.3% and a 9-month DoR of 57% in relapsed or refractory NSCLC patients with EGFR exon20ins. The revelation of 3 patients (2.8%) achieving a confirmed complete response (CR) indicated deep tumor shrinkage with sunvozertinib treatment." said Prof. James Chih-Hsin Yang, MD, PhD at National Taiwan University Hospital and National Taiwan University Cancer Center, the leading principal investigator of WU-KONG1B. "Safety findings were similar to what has been previously reported in other sunvozertinib clinical studies. The majority of treatment-related adverse events (TEAEs) were reversible and clinically manageable. We look forward to more data readouts to validate the clinical benefit of sunvozertinib in EGFR Exon20ins NSCLC."

"It’s encouraging to see that the global pivotal study demonstrated statistically significant and clinically meaningful benefits of sunvozertinib as a single agent in NSCLC patients with EGFR exon20ins. Compared to what is available, sunvozertinib offers significant advantages as a single, oral drug: convenient, safe, and superior efficacies." said Xiaolin Zhang, PhD, CEO of Dizal.

He added, "In parallel, we are advancing the development of sunvozertinib in the first-line setting of NSCLC with EGFR exon20ins through a global phase III study (WU-KONG28). The accumulated clinical data for sunvozertinib has attracted lots of attention and facilitated our studies. We want to thank our patients and investigators for their hard work. We are committed to accelerate ongoing clinical studies and make the drug available to patients globally as soon as possible."

WU-KONG28, a phase III, multinational, randomized study, is ongoing to assess sunvozertinib versus platinum-based doublet chemotherapy in the first-line setting with patients from 14 countries and regions in Asia, Europe, North America, and South America.

About sunvozertinib (DZD9008)

Sunvozertinib is an irreversible EGFR inhibitor discovered by Dizal scientists targeting a wide spectrum of EGFR mutations with wild-type EGFR selectivity. In August 2023, sunvozertinib received approval from NMPA to treat advanced NSCLC with EGFR exon20ins after platinum-based chemotherapies. The approval is based on the results of WU-KONG6 study, the pivotal study of sunvozertinib in platinum-based chemotherapy pretreated NSCLC with EGFR exon20ins. The primary endpoint of the study was the confirmed overall response rate (cORR) as assessed by the Independent Review Committee (IRC) reached 60.8%. Anti-tumor efficacy was observed across a broad range of EGFR exon20ins subtypes, and in patients with pretreated and stable brain metastasis. In addition, sunvozertinib also demonstrated encouraging anti-tumor activity in NSCLC patients with EGFR sensitizing, T790M, and uncommon mutations (such as G719X, L861Q, etc.), as well as HER2 exon20ins.

Sunvozertinib showed a well-tolerated and manageable safety profile in the clinic. The most common drug-related TEAEs (treatment-emergent adverse event) were Grade 1/2 in nature and clinically manageable.

Two global pivotal studies are ongoing in ≥ 2nd line (WU-KONG1 Part B) and 1st line setting (WU-KONG28), respectively, in NSCLC patients with EGFR exon20ins.

Pre-clinical and clinical results of sunvozertinib were published in peer-reviewed journals Cancer Discovery (IF:39.397) and The Lancet Respiratory Medicine (IF: 76.2).

Bio-Thera Solutions Presents Clinical Data for BAT8006 (Folate Receptor-alpha-ADC) at the 2024 American Society of Clinical Oncology (ASCO) Annual Meeting

On June 2, 2024 Bio-Thera Solutions Inc. (688177:SH), a commercial-stage biopharmaceutical company developing a pipeline of innovative therapies and biosimilars, reported that it will present a poster at the 2024 ASCO (Free ASCO Whitepaper) Annual Meeting entitled "Phase 1 study of BAT8006, a folate receptor α antibody drug conjugate with strong bystander effect, in subjects with advanced solid tumors," that highlights clinical data for the potential best-in-class efficacy and safety of BAT8006 as a potential treatment for ovarian cancer patients and other patients with tumors that express Folate Receptor-alpha (Press release, BioThera Solutions, JUN 2, 2024, View Source [SID1234643946]). The poster will be available on the company website after the presentation per ASCO (Free ASCO Whitepaper) rules

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As of May 8, 2024, 156 subjects with advanced solid tumor were treated in phase 1 study. In 84 and 93mg/m2 dose optimal/expansion cohorts (including all advanced solid tumor subjects), 3.5% (2/57) and 3.9% (2/51) subjects experienced dose reduction, and 5.3% (3/57) and 13.7% (7/51) subjects experienced study drug interruption, respectively. No study treatment related death, and no ILD/pneumonitis and keratitis, uveitis, decreased vision was reported in this study. The major TRAEs were hematological toxicity. The dosages of 84 and 93 mg/m2 were selected in dose optimal study, the incidences of ≥ Grade 3 thrombocytopenia and neutropenia were 9% vs 28% and 19% vs 37%, respectively.

To the date of data cut-off, 54 subjects with platinum refractory or platinum-resistant epithelial ovarian, fallopian tube or primary peritoneal cancer were treated with BAT8006 doses of 1.8~2.4 mg/kg and 84/93mg/m2 and have received at least one tumor assessment. Among these patients, 38.9% (21/54) of them had undergone>3 lines prior systemic treatment. Regardless of the FRα expression, the ORR including unconfirmed partial response (PR) is 37.0% (20/54). In subjects with FRα<50%, FRα ≥50% and FRα ≥75%, the ORR is 33.3% (7/21), 39.4% (13/33) and 46.7% (7/15), respectively. With a median follow up of 6.5 months (1.3, 18.0 months), the median duration of response (mDOR) was 6.3 months (1.8-16.5months). The median progression free survival (mPFS) was 7.47 months (4.27~NA). The overall survival (OS) rate in 6 months and 1 year were 83.0%, 83.0%.

The safety of BAT8006 is favorable with manageable toxicity. No ILD and notable ocular toxicity was reported. The preliminary efficacy of BAT8006 was superior even in all platinum-resistant ovarian cancer patients regardless of the FRα expression. BAT8006 may benefit broad patient population while providing a promising efficacy. Exploration study on endometrial carcinoma, breast cancer and NSCLC is ongoing, the efficacy was demonstrated in these tumor type as well.

BAT8006 is being developed for use as a single agent and in combination with other agents for the treatment of multiple cancers. BAT8006 is currently being evaluated in a Phase 2 clinical study for the treatment of ovarian and other Folate Receptor-alpha overexpressed cancers. Clinical study of BAT8006 in combination with BAT1308, a PD-1 mAb, was recently approved by the NMPA.

Presentation details are as follows:

Poster Session:

Gynecologic Cancer

Session Date and Time:

Monday, June 3rd, 9:00 am – 11:00 am

Location:

Poster Area/Exhibition Hall

Abstract Number:

5550

Poster Board Number:

421

MEDSIR’s PRIMED Study Shows Promising Results for Preventing Sacituzumab Govitecan related Side Effects in the Treatment of HER2-negative Advanced Breast Cancer

On June 2, 2024 Leading international medical research company, MEDSIR, reported the results of the recent PRIMED clinical trial during the 2024 ASCO (Free ASCO Whitepaper) Annual Meeting (Press release, MedSIR, JUN 2, 2024, View Source [SID1234643945]). Carried out under the company’s collaborative model, this Investigator-Initiated Trial (IIT) demonstrated the effectiveness of preventative administration of drugs to treat the common side effects of neutropenia and diarrhea that can occur while taking sacituzumab govitecan, an antibody-drug conjugate targeting Trop-2 that has extended overall survival for patients with pretreated triple negative and HR-positive/HER2-negative advanced breast cancer in two previous Phase 3 studies, ASCENT and TROPiCS-02. In the PRIMED study, adding primary prophylactic granulocyte colony-stimulating growth factors (G-CSF) and loperamide during the first two sacituzumab govitecan treatment cycles led to clinically meaningful reductions in neutropenia and diarrhea, lowering the need for dose reductions, treatment interruptions, and permanent discontinuations.

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"This is an exciting finding that highlights the high potential of prophylactic strategies that can mitigate side effects to help keep patients on promising treatments, which was made possible by our collaborative research model," shared Dr. Antonio Llombart-Cussac, Senior Scientific Leader of MEDSIR. "By using a partnership model that combines the benefits of company-sponsored research with all the advantages of IITs, we are turning brilliant ideas into full clinical trials that will safely and efficiently advance cancer solutions. It is our hope that, by working together, we will continue to generate new opportunities for patients worldwide."

Among PRIMED study participants, the incidence of any grade of neutropenia (in the first two cycles) was 28%, compared to 63% and 70% in ASCENT and TROPiCS-02 (in the full study), respectively. The incidence of any grade diarrhea (in the first two cycles) was 34%, compared to 59% and 57% in ASCENT and TROPiCS-02 (in the full study), respectively. The other side effects PRIMED study participants experienced were consistent to the known safety profile of sacituzumab govitecan, with the exception of constipation, which occurred in 46% of patients during the first two cycles compared to 17% in ASCENT and 19% in TROPiC-02 (in the full study). However, most cases of constipation were mild, and no patients experienced adverse events that led to permanent treatment discontinuation.

The study, which is still ongoing to evaluate efficacy and collect longer-term safety data, enrolled 50 patients between February 2023 and September 2023 across 10 sites across Spain, providing them with G-CSF and loperamide during the first two sacituzumab govitecan treatment cycles (physician’s decision to continue after two cycles). These two drugs are commonly used to treat neutropenia and diarrhea, respectively, but are usually administered only after these side effects occur. In PRIMED, researchers wanted to test whether early administration of these drugs, before patients experienced any neutropenia or diarrhea, could reduce the incidence of these side effects and determine how this affected the need for dose reductions, treatment interruptions, and permanent discontinuations.

Showcasing Numerous Promising Collaborative Trials at ASCO (Free ASCO Whitepaper)

PRIMED was not the only trial MEDSIR presented during the ASCO (Free ASCO Whitepaper) Annual Meeting. It shared the results of several other recent and ongoing studies as well.

Recently published in The Lancet, MEDSIR’s PHERGain phase II trial (NCT03161353) demonstrated how a third of patients with HER2-positive early breast cancer could be safely treated without using chemotherapy. At the 2024 ASCO (Free ASCO Whitepaper) Annual Meeting, MEDSIR presented a subanalysis of this study comparing PET scan and magnetic resonance imaging (MRI) results; both tests that participants undergo to observe the evolution of their cancer. The comparative study shows tumor assessments can be analyzed with both PET scan and MRI. Although PET scan is the recommended imaging technique for early treatment response, this exploratory study suggests that MRI could alternatively guide the treatment when PET scan are not available.

MEDSIR’s PATHFINDER study evaluated the safety, tolerability, and preliminary efficacy of ipatasertib in combination with non-taxane chemotherapy in patients with advanced triple negative breast cancer who had previously experienced tumor progression after treatment with taxane chemotherapy. Study results revealed that combining ipatasertib with capecitabine and eribulin has an acceptable safety profile in these patients, but that adding ipatasertib alongside carboplatin plus gemcitabine proved to be intolerable. Additionally, the combination of ipatasertib and eribulin demonstrated encouraging efficacy, warranting further investigation.

TUXEDO-3, one of MEDSIR’s ongoing clinical trials in Austria and Spain, is the first study evaluating the efficacy and safety of patritumab deruxtecan as an anti-cancer therapy for patients with pretreated metastatic breast cancer and advanced non-small cell lung cancer with brain metastases, and metastatic solid tumors with leptomeningeal disease. If positive, this study could streamline the introduction of HER3-DXd as a new treatment for these patients who currently have very limited therapeutic options.

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