On March 17, 2025 FibroGen, Inc. (NASDAQ: FGEN) reported financial results for the fourth quarter and full year 2024 and provided an update on the company’s recent developments (Press release, FibroGen, MAR 17, 2025, View Source [SID1234651180]).

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"We entered 2025 optimistic about our future, highlighted by the planned initiation of the Phase 2 monotherapy trial of FG-3246, our first-in-class ADC targeting CD46 for the treatment of mCRPC, by mid-2025," said Thane Wettig, Chief Executive Officer. "Through the successful implementation of our cost reduction plan, and upon the closing of our recently announced sale of FibroGen China, we will be a leaner and more focused organization, with a stronger financial position and a cash runway that takes us into 2027, with multiple potential value-creating milestones in sight."

Recent Developments and Key Highlights of 2024:

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Announced the sale of FibroGen China to AstraZeneca for a total consideration of approximately $160 million, representing an enterprise value of $85 million plus estimated net cash held in China at closing of approximately $75 million. The transaction is expected to close by mid-2025.
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Upon closing, FibroGen will repay its term loan to Morgan Stanley Tactical Value, further simplifying the Company’s capital structure.
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FibroGen maintains its rights to roxadustat in the U.S. and in all markets outside of China, South Korea, and those licensed to Astellas.
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Appointed David DeLucia, CFA, as Senior Vice President and Chief Financial Officer.
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Completed previously announced cost reduction program.

Upcoming Milestones:

FG-3246 (CD46 Targeting ADC) and FG-3180 (CD46 Targeting PET Imaging Agent)

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Anticipate initiation of Phase 2 monotherapy dose optimization study of FG-3246 in mCRPC by mid-2025.
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Phase 2 trial will include a sub-study of FG-3180 to enable assessment of its diagnostic performance and the potential correlation between CD46 expression and response to FG-3246.
•
Topline results from the Phase 2 portion of the investigator-sponsored Phase 1b/2 study conducted by UCSF of FG-3246 in combination with enzalutamide in patients with mCRPC expected in 2H 2025.
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Phase 2 portion of the study will include data on FG-3180.
Roxadustat

•
Plan to meet with FDA in 2Q 2025 to determine the potential next steps for the development of roxadustat in anemia associated with lower-risk myelodysplastic syndrome (LR-MDS), an indication with significant unmet medical need, in the U.S.Financial:

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Total revenue from continuing operations for the fourth quarter of 2024 was $3.1 million, as compared to $3.6 million for the fourth quarter of 2023.
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Total revenue from continuing operations for the full year 2024 was $29.6 million, as compared to $46.8 million for the full year 2023.
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Net loss from continuing operations for the fourth quarter of 2024 was $8.7 million, or $0.08 net loss per basic and diluted share, compared to a net loss of $62.5 million, or $0.63 net loss per basic and diluted share, one year ago.
•
Net loss from continuing operations for the full year 2024 was $153.1 million, or $1.53 net loss per basic and diluted share, compared to a net loss of $323.0 million, or $3.32 net loss per basic and diluted share, for the full year 2023.
•
At December 31, 2024, FibroGen reported $51.0 million in cash, cash equivalents and accounts receivable in the U.S. and $121.1 million in total consolidated cash, cash equivalents and accounts receivable.
•
Upon closing of the announced sale of FibroGen China, the Company expects its cash, cash equivalents and accounts receivable to be sufficient to fund operations into 2027.

Conference Call and Webcast Presentation

The FibroGen management team will host a conference call and webcast presentation to discuss the financial results and provide a business update. A live Q&A session will follow the brief presentation. Interested parties may access a live audio webcast of the conference call here. To access the call by phone, please register here, and you will be provided with dial in details. A replay of the webcast will also be available for a limited time on the Events & Presentations page on FibroGen’s website.

About FG-3246

FG-3246 (FOR46) is a potential first-in-class fully human antibody-drug conjugate (ADC), exclusively in-licensed from Fortis Therapeutics, and is being developed by FibroGen for metastatic castration-resistant prostate cancer and potentially other tumor types. FG-3246 binds to an epitope of CD46, a cell receptor target, that induces internalization upon antibody binding, is present at high levels in prostate cancer and other tumor types and demonstrates very limited expression in most normal tissues. FG-3246 is comprised of an anti-CD46 antibody, YS5, linked to the anti-mitotic agent, MMAE, which is a clinically and commercially validated ADC payload. FG-3246 has demonstrated anti-tumor activity in both preclinical and clinical studies.

FG-3246 is currently in an ongoing Phase 1b/2 study being conducted at UCSF as an investigator-sponsored trial to evaluate FG-3246 in combination with enzalutamide. An additional investigator-sponsored radiopharmaceutical marker trial using a zirconium-89 positron emission tomography (PET) tracer for CD46 that utilizes the YS5 antibody is also underway at UCSF. The initiation of the Phase 2 monotherapy dose optimization trial for FG-3246 in metastatic castration-resistant prostate cancer is anticipated by mid-2025. FG-3246 is an investigational drug and not approved for marketing by any regulatory authority.

About Roxadustat

Roxadustat, an oral medication, is the first in a new class of medicines comprising HIF-PH inhibitors that promote erythropoiesis, or red blood cell production, through increased endogenous production of erythropoietin, improved iron absorption and mobilization, and downregulation of hepcidin. Roxadustat is in clinical development for chemotherapy-induced anemia (CIA) and a Supplemental New Drug Application (sNDA) has been accepted by the China Health Authority.

Roxadustat is approved in China, Europe, Japan, and numerous other countries for the treatment of anemia of CKD in adult patients on dialysis (DD) and not on dialysis (NDD). FibroGen has the sole rights to roxadustat in the United States, Canada, Mexico, and in all markets not held by AstraZeneca or licensed to Astellas. Astellas and FibroGen are collaborating on the commercialization of roxadustat for the treatment of anemia in territories including Japan, Europe, Turkey, Russia, and the Commonwealth of Independent States, the Middle East, and South Africa.

On March 17, 2025 Tract Bio, a biotechnology company discovering and developing novel therapies for cancer and inflammatory disease, reported the publication of preclinical research in Gastroenterology (Press release, Tract Bio, MAR 17, 2025, View Source [SID1234651199]). The article, "Evolution of Esophageal Adenocarcinoma from Precursor Lesion Stem Cells" describes results from a preclinical study applying the Company’s proprietary stemECHO epithelial stem cell cloning technology, where regenerative stem cells were cloned from epithelial tissues to analyze the evolution of esophageal adenocarcinoma (EAC) and identify potential therapeutic targets and drug combinations.

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In the study, each of the precursor lesions in the evolution of EAC, including Barrett’s esophagus (BE), low-grade dysplasia (LGD), and high-grade dysplasia (HGD), were shown to possess discrete populations of clonogenic cells that are potential therapeutic targets. DNA sequencing of these clones revealed intralesional heterogeneity and clonal resolution of the mutation progression in patients with BE, LGD, HGD, and EAC. High-throughput chemical screens against BE stem cells reveal drug combinations that are similarly effective against stem cells of LDG, HGD, and EAC. Synthetic lethal combinations were then developed that appear effective against BE, LGD, HGD, and EAC, both in vitro and in vivo, while simultaneously promoting normal esophageal stem cells.

"EAC, as with all metastatic cancers, is the result of an evolutionary process which is dominated by a succession of precursor lesions," said Frank McKeon, Ph.D., Interim Chief Scientific Officer of Tract Bio. "In this study, our unique and proprietary epithelial stem cell cloning platform, stemECHO, allowed us to clone epithelial stem cells while preserving their genetic integrity, enabling the discovery of the underlying mechanism. By maintaining the genetic consistency of the cloned cells, we are able to study disease mechanisms with unprecedented precision, opening the door to new diagnostic tools and therapies. We look forward to continuing this important work."

"The clonogenic cells in each of the regenerative lesions described in this paper, BE, LGD, HGD and EAC, each display functional properties of stem cells. Given the role of stem cells of normal epithelia in the regenerative growth of these tissues, the lesional stem cells could represent important therapeutic targets within tumors," said Richard Russell, Chief Executive Officer of Tract Bio. "Toward this end, our synthetic lethal strategies identified highly effective drug combinations against BE stem cells that showed similar efficacy against stem cells from each lesion in the progression to EAC and EAC itself. Based on these findings, we expect that the continued development of these drug combinations may lead to clinically effective treatments to prevent or treat EAC and perhaps other epithelial cancers by targeting the root causes of these conditions."

On March 17, 2025 Genmab A/S (Nasdaq: GMAB) reported updated data from cohort B1 of the Phase 1/2 RAINFOL-01 study of rinatabart sesutecan (Rina-S), an investigational folate receptor-alpha (FRα)-targeted, TOPO1 antibody-drug conjugate (ADC) that showed Rina-S 120 mg/m2 every 3 weeks (Q3W) resulted in a confirmed objective response rate (ORR) of 55.6% (95% CI: 30.8-78.5) in heavily pre-treated ovarian cancer (OC) patients regardless of FRα expression levels (Press release, Genmab, MAR 17, 2025, View Source [SID1234651181]). With a median on-study follow-up of 48 weeks, 1 out of 10 patients experienced disease progression and the median duration of response (mDOR) was not reached (95% CI: 40.14-NR). The data are from the dose expansion cohort of the multi-part study evaluating the safety and efficacy of Rina-S as a single agent in solid tumors that are known to express FRα and were presented at the 2025 Society of Gynecologic Oncology Annual Meeting on Women’s Cancer (SGO) in Seattle, Washington.

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"The antitumor activity observed in the dose expansion cohort continues to demonstrate the potential for a much-needed treatment option for patients with PROC, who have historically had poor prognosis. I am hopeful that further exploration of Rina-S will lead to advancements in the treatment landscape." said Elizabeth Lee, M.D., a medical oncologist in the gynecologic oncology program at Dana-Farber.

The B1 cohort is a dose expansion study in patients with histologically or cytologically confirmed advanced OC (epithelial ovarian cancer, primary peritoneal cancer or fallopian tube cancer). Rina-S 120 mg/m2 Q3W at a median on-study follow-up of 48 weeks showed encouraging antitumor activity; the confirmed ORR was 55.6% (95% CI: 30.8-78.5), the disease control rate (DCR) was 88.9% (95% CI: 65.3-98.6), and the median duration of response (mDOR) was not reached (95% CI: 40.14-NR). In the 18 patients evaluable for response treated with 120 mg/m2 Q3W, complete responses were observed in 4 patients (2 confirmed; 2 unconfirmed) and 8 patients experienced confirmed partial responses (44.4%). Most responses with Rina-S 120 mg/m2 were observed early (at week 6). Only one patient in the 120 mg/m2 treatment arm was not evaluable. In the Rina-S 100 mg/m2 Q3W treatment arm (N=22), at a median on study follow-up of 46 weeks, the confirmed ORR was 22.7% (95% CI: 7.8-45.4), the DCR was 86.4% (95% CI: 65.1-97.1), and the mDOR was not reached (95% CI, 16.3-NR). Partial responses were observed in 4 patients (18.2%) and 1 patient (4.5%) experienced a complete response. Rina-S 120 mg/m2 has been selected for further evaluation in the RAINFOL-01 and Phase 3 RAINFOL-02 trials for patients with platinum resistant ovarian cancer (PROC).

In this Phase 1/2 study, common treatment-emergent adverse events (TEAEs) included anemia, nausea, neutropenia, leukopenia, fatigue, thrombocytopenia, vomiting, diarrhea, alopecia, and hypokalemia. Dose reductions and treatment discontinuations were infrequent and no new safety signals were observed.

"The updated results reinforce the potential of Rina-S and further validate our development approach in advanced ovarian cancer," said Judith Klimovsky, M.D., Executive Vice President and Chief Development Officer of Genmab. "We are excited to keep moving forward with the ongoing Phase 3 trial, to evaluate the potential of Rina-S as a treatment option for patients facing this challenging disease."

The safety and efficacy of rinatabart sesutecan has not been established for these investigational uses.

About the RAINFOLTM -01 Trial
RAINFOL-01 (NCT05579366) is an open-label, multicenter Phase 1/2 study, designed to evaluate the safety and efficacy of rinatabart sesutecan (Rina-S) as a single agent Q3W at various doses in solid tumors that are known to express FRα. The study consists of multiple parts including Part A dose-escalation cohorts; Part B tumor-specific monotherapy dose-expansion cohorts; Part C platinum-resistant ovarian cancer (PROC) cohort; and Part D combination therapy cohorts.

Part B of the trial includes the B1 cohort, a dose expansion study in patients with histologically or cytologically confirmed advanced OC (epithelial ovarian cancer, primary peritoneal cancer, or fallopian tube cancer). Patients were randomized 1:1 to 100 mg/m2 and 120 mg/m2 dose cohorts. Median age was 62.5 and 64.5 years in the 100 mg/m2 and 120 mg/m2 cohorts, respectively. Study participants were previously treated with a median of 3 prior lines of therapy (range 1-4). Patients received prior treatment with bevacizumab (90.9% in the 100 mg/m2 group and 90.0% in the 120 mg/m2 group respectively), PARP inhibitors (68.2%; 65%), and mirvetuximab soravtansin (18.2%; 19%). Initial results from Part B of this trial were presented during a mini-oral session at the European Society of Medical Oncology (ESMO) (Free ESMO Whitepaper) Congress 2024 (ESMO) (Free ESMO Whitepaper).

About Ovarian Cancer
Ovarian cancer is a major global health issue, with over 320,000 new cases diagnosed annually worldwide.i It ranks as the eighth most common cancer and the eighth leading cause of cancer-related deaths among women globally.ii The disease is often diagnosed at an advanced stage due to its subtle and non-specific symptoms, such as abdominal bloating, pelvic pain and difficulty eating.iii Standard of care for platinum resistant ovarian cancer typically involves single agent chemotherapy (pegylated liposomal doxorubicin (PLD), topotecan, gemcitabine or paclitaxel).iv Approximately 70-90% of women with advanced-stage ovarian cancer worldwide experience a recurrence after initial treatment.v Ovarian cancer has a low five-year survival rate, which varies significantly by region, but generally hovers around 30-50%.vi,vii

About Rinatabart Sesutecan (Rina-S; GEN1184)
Rinatabart sesutecan (Rina-S; GEN1184) is a FRα-targeted, TOPO1 ADC, currently being evaluated for the potential treatment of ovarian cancer and other FRα-expressing cancers. A Phase 3 trial (RAINFOL-02, NCT06619236) evaluating Rina-S in patients with platinum resistant ovarian cancer compared to treatment of investigator’s choice is ongoing. In January 2024, the U.S. Food and Drug Administration granted Fast Track designation to Rina-S for the treatment of patients with FRα-expressing high-grade serous or endometrioid platinum-resistant ovarian cancer.

Please visit www.clinicaltrials.gov for more information.

On March 17, 2025 Telix Pharmaceuticals Limited (ASX: TLX, Nasdaq: TLX, Telix, the Company) reported that the Brazilian Health Regulatory Agency (Agencia Nacional de Vigilancia Sanitaria or ‘ANVISA’) has approved Illuccix (kit for the preparation of gallium-68 (68Ga) gozetotide injection) the Company’s lead prostate cancer imaging agent (Press release, Telix Pharmaceuticals, MAR 17, 2025, View Source [SID1234651200]). Illuccix is the first and only PSMA-PET[1] prostate cancer imaging agent to receive full regulatory approval in Brazil.

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Illuccix, after radiolabeling with 68Ga, is a radioactive diagnostic agent indicated for positron emission tomography (PET) of prostate-specific membrane antigen (PSMA) positive lesions in men with prostate cancer:

With suspected metastasis who are candidates for definitive initial therapy treatment, and
With suspected recurrence based on an elevated specific antigen (PSA) level in the serum.
The marketing authorization is granted to Telix’s partner R2PHARMA, Brazil’s leading cold kit manufacturer, nuclear pharmacy and cyclotron network, and a subsidiary of GSH Corp Participações S.A. (Grupo GSH). Telix has provided Grupo GSH with an exclusive license to manufacture, distribute and market Illuccix in Brazil[2].

PSMA-PET is a diagnostic technology demonstrated to detect advanced prostate cancer. ANVISA becomes the latest regulatory body worldwide to approve Illuccix[3], which is already commercially available in Australia, Canada, New Zealand and the United States, and has recently been approved in the United Kingdom and in multiple countries within the European Economic Area (EEA).

Dr. Sérgio Altino de Almeida, nuclear medicine specialist, at Rede D’Or, the largest integrated healthcare network in Brazil said, "The ANVISA approval of Illuccix provides access to advanced prostate cancer imaging for men across Brazil, a large and rapidly growing market for gallium-68 based radiopharmaceuticals. The ‘cold kit’ format with generator-produced gallium will facilitate broad equity of access for men living with prostate cancer, regardless of whether they are based in regional, rural or metropolitan areas."

JV to manufacture and distribute radiopharmaceuticals for clinical and commercial use in Brazil

Telix also announces a joint venture (JV) with R2PHARMA to commercialize and distribute Telix’s therapeutic and diagnostic radiopharmaceutical products in Brazil, building on the existing partnership established in 2019. The JV further strengthens this relationship with a commitment to jointly bring to market innovative and first-in-class therapeutic radiopharmaceuticals and imaging agents in Brazil.

The market for radiopharmaceuticals in Brazil is experiencing significant growth driven by the increasing prevalence of chronic diseases such as cancer, advancements in imaging technologies, and a growing senior population. Over the next decade, the Brazilian radiopharmaceuticals market is projected to reach US$330 million[4], with this growth supported by rising investments in the healthcare industry, public health awareness, and the introduction of new and advanced radiopharmaceuticals.

Under the agreement, Telix and R2PHARMA will establish a JV company in Brazil (Telix Innovations Brazil, Ltda.). Telix Innovations Brazil will hold the exclusive licence to commercialize and distribute Illuccix as well as future product candidates from Telix’s industry-leading theranostic pipeline. Telix Innovations Brazil will leverage the local knowledge and expertise of R2PHARMA to obtain the necessary licenses and governmental authorizations in Brazil[5].

Raphaël Ortiz, CEO Telix International, added, "Telix is pleased to bring Illuccix to Brazil and Latin America, with this new imaging modality now recognized in leading clinical practice guidelines and already being adopted in other parts of the world. We would like to acknowledge our partner R2PHARMA for their commitment to gallium-based PSMA-PET and the hope this brings for men living with prostate cancer in Brazil. The JV takes our collaboration to the next stage with the aim to address unmet need for therapeutic and diagnostic radiopharmaceuticals across a range of disease areas."

R2PHARMA Nuclear Medicine & Innovation Vice-President, Rafael Madke, continued, "We are delighted to have been granted this marketing authorization for Illuccix in Brazil. The combination of Telix’s innovative theranostic pipeline and R2PHARMA’s manufacturing and distribution capabilities will support widespread access for patients and physicians to Illuccix and future additional products that until now have not been available in Latin America."

About Prostate Cancer in Brazil

Prostate cancer is the most commonly diagnosed male cancer in Brazil with an estimated 71,730 new cases in 2023[6]. Prostate cancer was also the second most common cause of cancer death in men (after lung cancer), with approximately 20,000 men dying from their disease in 2022. More than 250,000 men in Brazil were estimated to be living with prostate cancer in 2022[7].

About Illuccix

Illuccix is a kit for the preparation of gallium-68 (68Ga) gozetotide (also known as PSMA-11) injection, a radioactive diagnostic agent indicated for PET imaging combined with computerized tomography (CT) scan in case of suspicion of prostate cancer relapse in adult males to detect and localize recurrent cancerous lesions. 68Ga gozetotide injection targets PSMA, a protein that is overexpressed on the surface of more than 90% of primary and metastatic prostate cancer cells. Illuccix enables gozetotide (PSMA-11) to be labelled with the radionuclide 68Ga directly before injection by medical professionals.

Illuccix has been approved by the U.S. Food and Drug Administration (FDA)[8], by the Australian Therapeutic Goods Administration (TGA)[9], by Health Canada[10], by the United Kingdom (UK) Medicines and Healthcare Products Regulatory Agency (MHRA)[11], by the Brazilian Health Regulatory Agency (ANVISA)[12] and in multiple countries within the EEA[13] following a positive decentralized procedure (DCP) opinion by the German medical regulator, BfArM.

On March 17, 2025 Greenwich LifeSciences, Inc. (Nasdaq: GLSI) (the "Company"), a clinical-stage biopharmaceutical company focused on its Phase III clinical trial, FLAMINGO-01, which is evaluating GLSI-100, an immunotherapy to prevent breast cancer recurrences, reported the following update on FLAMINGO-01 open label safety data (Press release, Greenwich LifeSciences, MAR 17, 2025, View Source [SID1234651182]).

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FLAMINGO-01 Data Safety Monitoring Board (DSMB)

The FLAMINGO-01 DSMB met twice in 2024, most recently in December 2024, and recommended to continue the study as is without modification. No serious adverse events related to GLSI-100 have been reported to date in FLAMINGO-01. Additional safety updates and comparison to the Phase IIb safety data are provided below.

Phase IIb Safety Data

In the prospective, randomized, single-blinded, placebo-controlled, multi-center (16 sites led by MD Anderson Cancer Center) Phase IIb clinical trial of HLA-A*02 breast cancer patients, 46 HER2/neu 3+ over-expressor patients were treated with GLSI-100, and 50 placebo patients were treated with GM-CSF alone. After 5 years of follow-up, there was an 80% or greater reduction in cancer recurrences in the HER2/neu 3+ patients who were treated with GLSI-100, followed, and remained disease free over the first 6 months, which we believe is the time required to reach peak immunity and thus maximum efficacy and protection. The Phase IIb results can be summarized as follows:

80% or greater reduction in metastatic breast cancer recurrence rate over 5 years of follow-up compared to 20-50% reduction in recurrence rate by other approved products
Peak immune response at 6 months
No reported serious adverse events attributable to treatment
Well-tolerated safety profile
Full immunization was received in the Primary Immunization Series (PIS), which included the first 6 GLSI-100 injections over the first 6 months. The PIS elicited a potent immune response as measured by local skin tests and immunological assays. Further, booster injections given every 6 months prolonged the immune response, thereby providing longer-term protection. In the Phase IIb and three Phase I clinical trials, where 146 patients were treated, the GP2 immunotherapy was well tolerated, and there were no reported serious adverse events related to GLSI-100.

The Phase IIb safety data was published at ASCO (Free ASCO Whitepaper) in 2021 with the following findings:

GP2 immunotherapy is well-tolerated and no safety signal for GP2 was identified. Additionally, no serious adverse events related to GP2 immunotherapy were reported over the full 5 year treatment and follow-up periods.
The majority of patients experienced mild or moderate injection site reactions, which accounted for approximately 70% of reported adverse events.
The incidence of adverse events was similar across HER2 3+ and HER2 1-2+ breast cancer patients, consistent with the previously reported findings that the immune response was similar across both patient populations. This suggests that GP2 immunotherapy could be a potential treatment in HER2 1-2+ patients or in other HER2 expressing cancers.
FLAMINGO-01 Safety Data

Analysis of the open label data from FLAMINGO-01 has commenced and has been conducted in a manner that maintains the study blind. The open label safety data is based on the patients enrolled to date in FLAMINGO-01 and is thus preliminary. While comparing this preliminary FLAMINGO-01 data to the Phase IIb clinical trial data is possible, these preliminary results from FLAMINGO-01 are not a prediction of future results. It is important to note that this preliminary summary may not reflect results at the end of the study.

A preliminary review of FLAMINGO-01 safety data in both the HLA-A*02 treated and placebo arms and the third open label arm with all other HLA types, shows that GP2 immunotherapy continues to be well-tolerated and that no safety signal for GP2 has yet to be identified across all arms of the study. Like the Phase IIb clinical trial, the most frequent adverse event is injection site reaction, which is also a sign of an immune response. As the study matures, the frequency of events related to GLSI-100 will increase, which based on the current data, suggests that the FLAMINGO-01 safety data is trending towards a similar safety profile to that of the Phase IIb study. As a result, this preliminary analysis, and that of the DSMB, is to recommend no changes to FLAMINGO-01 nor to the investigator brochure, where any new or unexpected safety data might be added.

CEO Snehal Patel commented, "We are pleased that the preliminary safety data from FLAMINGO-01 is consistent with the Phase IIb safety data suggesting that GLSI-100 is well tolerated with no safety signal. The safety data, especially the diameter of injection site reactions, can be measured and thus can be used to assess the magnitude of immune response, along with our GP2 skin test. We look forward to analyzing the immune response data and comparing FLAMINGO-01 preliminary results to the Phase IIb data. There is also the potential that some of the HLA, safety, or immune response data from FLAMINGO-01 will be presented at future scientific conferences as the data continues to mature and patient enrollment continues to accelerate."

About FLAMINGO-01 and GLSI-100

FLAMINGO-01 (NCT05232916) is a Phase III clinical trial designed to evaluate the safety and efficacy of GLSI-100 (GP2 + GM-CSF) in HER2 positive breast cancer patients who had residual disease or high-risk pathologic complete response at surgery and who have completed both neoadjuvant and postoperative adjuvant trastuzumab based treatment. The trial is led by Baylor College of Medicine and currently includes US clinical sites from university-based hospitals and cooperative networks with plans to expand into Europe and to open up to 150 sites globally. In the double-blinded arms of the Phase III trial, approximately 500 HLA-A*02 patients will be randomized to GLSI-100 or placebo, and up to 250 patients of other HLA types will be treated with GLSI-100 in a third arm. The trial has been designed to detect a hazard ratio of 0.3 in invasive breast cancer-free survival, where 28 events will be required. An interim analysis for superiority and futility will be conducted when at least half of those events, 14, have occurred. This sample size provides 80% power if the annual rate of events in placebo-treated subjects is 2.4% or greater.

For more information on FLAMINGO-01, please visit the Company’s website here and clinicaltrials.gov here. Contact information and an interactive map of the majority of participating clinical sites can be viewed under the "Contacts and Locations" section. Please note that the interactive map is not viewable on mobile screens. Related questions and participation interest can be emailed to: [email protected]

About Breast Cancer and HER2/neu Positivity

One in eight U.S. women will develop invasive breast cancer over her lifetime, with approximately 300,000 new breast cancer patients and 4 million breast cancer survivors. HER2 (human epidermal growth factor receptor 2) protein is a cell surface receptor protein that is expressed in a variety of common cancers, including in 75% of breast cancers at low (1+), intermediate (2+), and high (3+ or over-expressor) levels.