IMFINZI® (durvalumab) Plus Chemotherapy Significantly Improved Pathologic Complete Response in AEGEAN Phase III Trial in Resectable Non-Small Cell Lung Cancer

Rhea-AI Summary

AstraZeneca announced positive interim results from the AEGEAN Phase III trial, showing that IMFINZI (durvalumab) combined with neoadjuvant chemotherapy significantly improves pathologic complete response (pCR) rates in resectable non-small cell lung cancer (NSCLC). The safety profile was consistent with previous findings, and no reduction in surgery success rates was noted. The trial will continue to explore event-free survival as a primary endpoint. IMFINZI is already approved for use in unresectable Stage III NSCLC and is being evaluated in multiple ongoing trials across various cancer types.

Positive

• Statistically significant increase in pathologic complete response (pCR) with IMFINZI in the AEGEAN trial.
• Safety profile consistent with prior studies, indicating no decrease in successful surgeries.
• IMFINZI is already approved for unresectable Stage III NSCLC, enhancing its market potential.

Negative

• None.

Trial will continue to assess additional primary endpoint of event-free survival

WILMINGTON, Del.--(BUSINESS WIRE)-- Positive high-level results from a planned interim analysis of the AEGEAN Phase III trial showed treatment with AstraZeneca’s IMFINZI^® (durvalumab) in combination with neoadjuvant chemotherapy before surgery demonstrated a statistically significant and meaningful improvement in pathologic complete response (pCR) compared to neoadjuvant chemotherapy alone for patients with resectable non-small cell lung cancer (NSCLC).

A statistically significant improvement in major pathologic response (MPR) was also observed. The trial will continue as planned to assess the additional primary endpoint of event-free survival (EFS) to which the Company, investigators and participants remain blinded.

The safety and tolerability of adding IMFINZI to neoadjuvant chemotherapy was consistent with the known profile for this combination and did not decrease the number of patients able to undergo successful surgery versus chemotherapy alone.

Up to 30% of all patients globally with NSCLC are diagnosed early enough to have surgery with curative intent.^1-3 However, only around 56-65% of patients with Stage II disease will survive for five years. This decreases to 24-41% for patients with Stage III disease.⁴

Susan Galbraith, Executive Vice President, Oncology R&D, said: ‘‘Treating resectable lung cancer early provides the best chance for a cure, yet lung cancer will still recur within five years for the majority of patients despite chemotherapy and successful surgery. Engaging the immune response with IMFINZI both before and after surgery is an exciting new strategy, and we hope these early findings from AEGEAN will lead to improved survival for lung cancer patients in this potentially curative setting.”

These pCR data will be shared with global health authorities and presented at a forthcoming medical meeting when EFS results are available.

AstraZeneca has several ongoing registrational trials focused on testing IMFINZI in earlier stages of lung cancer, including in resectable NSCLC (ADJUVANT BR.31) and unresectable NSCLC (PACIFIC-2, 4, 5, 8 and 9), and in limited-stage small cell lung cancer (SCLC) (ADRIATIC).

IMFINZI is approved in the curative-intent setting of unresectable Stage III NSCLC in patients whose disease has not progressed after chemoradiotherapy in the US, Japan, China, across the EU and many other countries, and is the global standard of care in this setting based on the PACIFIC Phase III trial. IMFINZI is also approved in the US, EU, Japan, China and many other countries around the world for the treatment of extensive-stage SCLC based on the CASPIAN Phase III trial.

IMPORTANT SAFETY INFORMATION
There are no contraindications for IMFINZI^® (durvalumab).

Immune-Mediated Adverse Reactions
Important immune-mediated adverse reactions listed under Warnings and Precautions may not include all possible severe and fatal immune-mediated reactions. Immune-mediated adverse reactions, which may be severe or fatal, can occur in any organ system or tissue. Immune-mediated adverse reactions can occur at any time after starting treatment or after discontinuation. Monitor patients closely for symptoms and signs that may be clinical manifestations of underlying immune-mediated adverse reactions. Evaluate liver enzymes, creatinine, and thyroid function at baseline and periodically during treatment. In cases of suspected immune-mediated adverse reactions, initiate appropriate workup to exclude alternative etiologies, including infection. Institute medical management promptly, including specialty consultation as appropriate. Withhold or permanently discontinue IMFINZI depending on severity. See Dosing and Administration for specific details. In general, if IMFINZI requires interruption or discontinuation, administer systemic corticosteroid therapy (1 mg to 2 mg/kg/day prednisone or equivalent) until improvement to Grade 1 or less. Upon improvement to Grade 1 or less, initiate corticosteroid taper and continue to taper over at least 1 month. Consider administration of other systemic immunosuppressants in patients whose immune-mediated adverse reactions are not controlled with corticosteroid therapy.

Immune-Mediated Pneumonitis
IMFINZI can cause immune-mediated pneumonitis. The incidence of pneumonitis is higher in patients who have received prior thoracic radiation. In patients who did not receive recent prior radiation, the incidence of immune-mediated pneumonitis was 2.4% (34/1414), including fatal (<0.1%), and Grade 3-4 (0.4%) adverse reactions. In patients who received recent prior radiation, the incidence of pneumonitis (including radiation pneumonitis) in patients with unresectable Stage III NSCLC following definitive chemoradiation within 42 days prior to initiation of IMFINZI in PACIFIC was 18.3% (87/475) in patients receiving IMFINZI and 12.8% (30/234) in patients receiving placebo. Of the patients who received IMFINZI (475), 1.1% were fatal and 2.7% were Grade 3 adverse reactions. The frequency and severity of immune-mediated pneumonitis in patients who did not receive definitive chemoradiation prior to IMFINZI were similar in patients who received IMFINZI as a single agent or with ES-SCLC when in combination with chemotherapy.

Immune-Mediated Colitis
IMFINZI can cause immune-mediated colitis that is frequently associated with diarrhea. Cytomegalovirus (CMV) infection/reactivation has been reported in patients with corticosteroid-refractory immune-mediated colitis. In cases of corticosteroid-refractory colitis, consider repeating infectious workup to exclude alternative etiologies. Immune-mediated colitis occurred in 2% (37/1889) of patients receiving IMFINZI, including Grade 4 (<0.1%) and Grade 3 (0.4%) adverse reactions.

Immune-Mediated Hepatitis
IMFINZI can cause immune-mediated hepatitis. Immune-mediated hepatitis occurred in 2.8% (52/1889) of patients receiving IMFINZI, including fatal (0.2%), Grade 4 (0.3%) and Grade 3 (1.4%) adverse reactions.

Immune-Mediated Endocrinopathies

• Adrenal Insufficiency: IMFINZI can cause primary or secondary adrenal insufficiency. For Grade 2 or higher adrenal insufficiency, initiate symptomatic treatment, including hormone replacement as clinically indicated. Immune-mediated adrenal insufficiency occurred in 0.5% (9/1889) of patients receiving IMFINZI, including Grade 3 (<0.1%) adverse reactions.
• Hypophysitis: IMFINZI can cause immune-mediated hypophysitis. Hypophysitis can present with acute symptoms associated with mass effect such as headache, photophobia, or visual field cuts. Hypophysitis can cause hypopituitarism. Initiate symptomatic treatment including hormone replacement as clinically indicated. Grade 3 hypophysitis/hypopituitarism occurred in <0.1% (1/1889) of patients who received IMFINZI.
• Thyroid Disorders: IMFINZI can cause immune-mediated thyroid disorders. Thyroiditis can present with or without endocrinopathy. Hypothyroidism can follow hyperthyroidism. Initiate hormone replacement therapy for hypothyroidism or institute medical management of hyperthyroidism as clinically indicated.
• Thyroiditis: Immune-mediated thyroiditis occurred in 0.5% (9/1889) of patients receiving IMFINZI, including Grade 3 (<0.1%) adverse reactions.
• Hyperthyroidism: Immune-mediated hyperthyroidismoccurred in 2.1% (39/1889) of patients receiving IMFINZI.
• Hypothyroidism: Immune-mediated hypothyroidism occurred in 8.3% (156/1889) of patients receiving IMFINZI, including Grade 3 (<0.1%) adverse reactions.
• Type 1 Diabetes Mellitus, which can present with diabetic ketoacidosis: Monitor patients for hyperglycemia or other signs and symptoms of diabetes. Initiate treatment with insulin as clinically indicated. Grade 3 immune-mediated type 1 diabetes mellitus occurred in <0.1% (1/1889) of patients receiving IMFINZI.

Immune-Mediated Nephritis with Renal Dysfunction
IMFINZI can cause immune-mediated nephritis. Immune-mediated nephritis occurred in 0.5% (10/1889) of patients receiving IMFINZI, including Grade 3 (<0.1%) adverse reactions.

Immune-Mediated Dermatology Reactions
IMFINZI can cause immune-mediated rash or dermatitis. Exfoliative dermatitis, including Stevens-Johnson Syndrome (SJS), drug rash with eosinophilia and systemic symptoms (DRESS), and toxic epidermal necrolysis (TEN), have occurred with PD-1/L-1 blocking antibodies. Topical emollients and/or topical corticosteroids may be adequate to treat mild to moderate non-exfoliative rashes. Immune-mediated rash or dermatitis occurred in 1.8% (34/1889) of patients receiving IMFINZI, including Grade 3 (0.4%) adverse reactions.

Other Immune-Mediated Adverse Reactions
The following clinically significant, immune-mediated adverse reactions occurred at an incidence of less than 1% each in patients who received IMFINZI or were reported with the use of other PD-1/PD-L1 blocking antibodies.

• Cardiac/vascular: Myocarditis, pericarditis, vasculitis.
• Nervous system: Meningitis, encephalitis, myelitis and demyelination, myasthenic syndrome/myasthenia gravis (including exacerbation), Guillain-Barré syndrome, nerve paresis, autoimmune neuropathy.
• Ocular: Uveitis, iritis, and other ocular inflammatory toxicities can occur. Some cases can be associated with retinal detachment. Various grades of visual impairment to include blindness can occur. If uveitis occurs in combination with other immune-mediated adverse reactions, consider a Vogt-Koyanagi-Harada-like syndrome, as this may require treatment with systemic steroids to reduce the risk of permanent vision loss.
• Gastrointestinal: Pancreatitis including increases in serum amylase and lipase levels, gastritis, duodenitis.
• Musculoskeletal and connective tissue disorders: Myositis/polymyositis, rhabdomyolysis and associated sequelae including renal failure, arthritis, polymyalgia rheumatic.
• Endocrine: Hypoparathyroidism
• Other (hematologic/immune): Hemolytic anemia, aplastic anemia, hemophagocytic lymphohistiocytosis, systemic inflammatory response syndrome, histiocytic necrotizing lymphadenitis (Kikuchi lymphadenitis), sarcoidosis, immune thrombocytopenia, solid organ transplant rejection.

Infusion-Related Reactions
IMFINZI can cause severe or life-threatening infusion-related reactions. Monitor for signs and symptoms of infusion-related reactions. Interrupt, slow the rate of, or permanently discontinue IMFINZI based on the severity. See Dosing and Administration for specific details. For Grade 1 or 2 infusion-related reactions, consider using pre-medications with subsequent doses. Infusion-related reactions occurred in 2.2% (42/1889) of patients receiving IMFINZI, including Grade 3 (0.3%) adverse reactions.

Complications of Allogeneic HSCT after IMFINZI
Fatal and other serious complications can occur in patients who receive allogeneic hematopoietic stem cell transplantation (HSCT) before or after being treated with a PD-1/L-1 blocking antibody. Transplant-related complications include hyperacute graft-versus-host-disease (GVHD), acute GVHD, chronic GVHD, hepatic veno-occlusive disease (VOD) after reduced intensity conditioning, and steroid-requiring febrile syndrome (without an identified infectious cause). These complications may occur despite intervening therapy between PD-1/L-1 blockade and allogeneic HSCT. Follow patients closely for evidence of transplant-related complications and intervene promptly. Consider the benefit versus risks of treatment with a PD-1/L-1 blocking antibody prior to or after an allogeneic HSCT.

Embryo-Fetal Toxicity
Based on its mechanism of action and data from animal studies, IMFINZI can cause fetal harm when administered to a pregnant woman. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with IMFINZI and for at least 3 months after the last dose of IMFINZI.

Lactation
There is no information regarding the presence of IMFINZI in human milk; however, because of the potential for adverse reactions in breastfed infants from IMFINZI, advise women not to breastfeed during treatment and for at least 3 months after the last dose.

Adverse Reactions

• In patients with Stage III NSCLC in the PACIFIC study receiving IMFINZI (n=475), the most common adverse reactions (≥20%) were cough (40%), fatigue (34%), pneumonitis or radiation pneumonitis (34%), upper respiratory tract infections (26%), dyspnea (25%), and rash (23%). The most common Grade 3 or 4 adverse reactions (≥3%) were pneumonitis/radiation pneumonitis (3.4%) and pneumonia (7%)
• In patients with Stage III NSCLC in the PACIFIC study receiving IMFINZI (n=475), discontinuation due to adverse reactions occurred in 15% of patients in the IMFINZI arm. Serious adverse reactions occurred in 29% of patients receiving IMFINZI. The most frequent serious adverse reactions (≥2%) were pneumonitis or radiation pneumonitis (7%) and pneumonia (6%). Fatal pneumonitis or radiation pneumonitis and fatal pneumonia occurred in <2% of patients and were similar across arms
• In patients with extensive-stage SCLC in the CASPIAN study receiving IMFINZI plus chemotherapy (n=265), the most common adverse reactions (≥20%) were nausea (34%), fatigue/asthenia (32%), and alopecia (31%). The most common Grade 3 or 4 adverse reaction (≥3%) was fatigue/asthenia (3.4%)
• In patients with extensive-stage SCLC in the CASPIAN study receiving IMFINZI plus chemotherapy (n=265), IMFINZI was discontinued due to adverse reactions in 7% of the patients receiving IMFINZI plus chemotherapy. Serious adverse reactions occurred in 31% of patients receiving IMFINZI plus chemotherapy. The most frequent serious adverse reactions reported in at least 1% of patients were febrile neutropenia (4.5%), pneumonia (2.3%), anemia (1.9%), pancytopenia (1.5%), pneumonitis (1.1%), and COPD (1.1%). Fatal adverse reactions occurred in 4.9% of patients receiving IMFINZI plus chemotherapy

The safety and effectiveness of IMFINZI have not been established in pediatric patients.

Indications:
IMFINZI is indicated for the treatment of adult patients with unresectable Stage III non-small cell lung cancer (NSCLC) whose disease has not progressed following concurrent platinum-based chemotherapy and radiation therapy.

IMFINZI, in combination with etoposide and either carboplatin or cisplatin, is indicated for the first-line treatment of adult patients with extensive-stage small cell lung cancer (ES-SCLC).

Please see complete Prescribing Information, including Medication Guide.

Notes

Lung cancer
In 2020, an estimated 2.2 million people were diagnosed with lung cancer worldwide.⁵ Lung cancer is the leading cause of cancer mortality among men and women and accounts for about one-fifth of all cancer-related deaths.⁵ Lung cancer is broadly split into NSCLC and SCLC, with 80-85% classified as NSCLC.⁶ The majority of NSCLC patients are diagnosed with advanced disease while approximately 25-30% present with resectable disease at diagnosis. ^1-2 Early-stage lung cancer diagnoses are often only made when the cancer is found on imaging for an unrelated condition.^7-8

For patients with resectable tumors, the majority of patients eventually develop recurrence despite complete tumor resection and adjuvant chemotherapy.

AEGEAN
AEGEAN is a randomized, double-blind, multi-center, global Phase III trial evaluating IMFINZI as perioperative treatment for patients with resectable Stage IIA-IIIB (tumors greater than or equal to 4cm or node positive) NSCLC with no EGFR or ALK genomic tumor aberrations, irrespective of PD-L1 expression. Perioperative therapy includes treatment before and after surgery, also known as neoadjuvant/adjuvant therapy. In the trial, 802 patients were randomized to receive a 1500mg fixed dose of IMFINZI every three weeks plus chemotherapy or placebo plus chemotherapy for four cycles prior to surgery, followed by IMFINZI or placebo every four weeks (for up to 12 cycles) after surgery.

In the AEGEAN trial, the primary endpoints are pCR, defined as no viable tumor following neoadjuvant therapy, and EFS, defined as the time from randomization to an event like tumor recurrence or progression. At this interim analysis EFS was not assessed. Key secondary endpoints are MPR, defined as residual viable tumor of less than or equal to ten percent following neoadjuvant therapy, disease-free survival, overall survival, safety and quality of life. The trial is being conducted across 264 centers in more than 25 countries including in the US, Canada, Europe, South America and Asia.

IMFINZI^®
IMFINZI (durvalumab) is a human monoclonal antibody that binds to the PD-L1 protein and blocks the interaction of PD-L1 with the PD-1 and CD80 proteins, countering the tumor’s immune-evading tactics and releasing the inhibition of immune responses.

As well as global approvals in lung cancer, IMFINZI is approved for previously treated patients with advanced bladder cancer in several countries.

Since the first approval in May 2017, more than 100,000 patients have been treated with IMFINZI.

As part of a broad development program, IMFINZI is being tested as a single treatment and in combinations with other anti-cancer treatments for patients with SCLC, NSCLC, bladder cancer, several GI cancers, ovarian cancer, endometrial cancer and other solid tumors.

In the past year, IMFINZI combinations have resulted in positive Phase III trials in multiple additional cancer settings including; unresectable advanced liver cancer (HIMALAYA), biliary tract cancer (TOPAZ-1) and metastatic NSCLC (POSEIDON) and the data are under review with global health authorities.

AstraZeneca in lung cancer
AstraZeneca is working to bring patients with lung cancer closer to cure through the detection and treatment of early-stage disease, while also pushing the boundaries of science to improve outcomes in resistant and advanced settings. By defining new therapeutic targets and investigating innovative approaches, the Company aims to match medicines to the patients who can benefit most.

The Company’s comprehensive portfolio includes leading lung cancer medicines and the next wave of innovations including osimertinib; durvalumab and tremelimumab; trastuzumab deruxtecan and datopotamab deruxtecan in collaboration with Daiichi Sankyo; savolitinib in collaboration with HUTCHMED; as well as a pipeline of potential new medicines and combinations across diverse mechanisms of action.

AstraZeneca is a founding member of the Lung Ambition Alliance, a global coalition working to accelerate innovation and deliver meaningful improvements for people with lung cancer, including and beyond treatment.

AstraZeneca in immunotherapy
Immunotherapy is a therapeutic approach designed to stimulate the body’s immune system to attack tumors. The Company’s Immuno-Oncology (IO) portfolio is anchored in immunotherapies that have been designed to overcome evasion of the anti-tumor immune response. AstraZeneca is invested in using IO approaches that deliver long-term survival for new groups of patients across tumor types.

The Company is pursuing a comprehensive clinical-trial program that includes IMFINZI as a single treatment and in combination with tremelimumab and other novel antibodies in multiple tumor types, stages of disease, and lines of treatment, and where relevant using the PD-L1 biomarker as a decision-making tool to define the best potential treatment path for a patient.

In addition, the ability to combine the IO portfolio with radiation, chemotherapy, and targeted small molecules from across AstraZeneca’s oncology pipeline, and from research partners, may provide new treatment options across a broad range of tumors.

AstraZeneca in oncology
AstraZeneca is leading a revolution in oncology with the ambition to provide cures for cancer in every form, following the science to understand cancer and all its complexities to discover, develop and deliver life-changing medicines to patients.

The Company's focus is on some of the most challenging cancers. It is through persistent innovation that AstraZeneca has built one of the most diverse portfolios and pipelines in the industry, with the potential to catalyze changes in the practice of medicine and transform the patient experience.

AstraZeneca has the vision to redefine cancer care and, one day, eliminate cancer as a cause of death.

About AstraZeneca
AstraZeneca is a global, science-led biopharmaceutical company that focuses on the discovery, development and commercialization of prescription medicines in Oncology, Rare Diseases and BioPharmaceuticals, including Cardiovascular, Renal & Metabolism, and Respiratory & Immunology. Based in Cambridge, UK, AstraZeneca operates in over 100 countries, and its innovative medicines are used by millions of patients worldwide. For more information, please visit www.astrazeneca-us.com and follow us on Twitter @AstraZenecaUS.

References

1. Cagle PT, et al. Lung Cancer Biomarkers: Present Status and Future Developments. Arch Pathol Lab Med. 2013;137:1191-1198.
2. Le Chevalier T. Adjuvant Chemotherapy for Resectable Non-Small-Cell Lung Cancer: Where is it Going? Ann Oncol. 2010;21:vii196-198.
3. Pignon JP, et al. Lung Adjuvant Cisplatin Evaluation: A Pooled Analysis by the LACE Collaborative Group. J Clin Oncol. 2008;26:3552-3559.
4. Goldstraw P, et al. The IASLC Lung Cancer Staging Project: Proposals for Revision of the TNM Stage Groupings in the Forthcoming (Eighth) Edition of the TNM Classification for Lung Cancer. J Thorac Oncol. 2016;11(1):39-51. doi:10.1016/j.jtho.2015.09.009
5. World Health Organization. International Agency for Research on Cancer. Lung Fact Sheet. Available at https://gco.iarc.fr/today/data/factsheets/cancers/15-Lung-fact-sheet.pdf Accessed June 2022.
6. LUNGevity Foundation. Types of Lung Cancer. Available at https://lungevity.org/for-patients-caregivers/lung-cancer-101/types-of-lung-cancer. Accessed June 2022.
7. Sethi S, et al. Incidental Nodule Management – Should There Be a Formal Process?. Journal of Thorac Onc. 2016:8;S494-S497.
8. LUNGevity Foundation. Screening and Early Detection. Available at https://lungevity.org/for-patients-caregivers/lung-cancer-101/screening-early-detection. Accessed June 2022.

 

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Source: AstraZeneca Pharmaceuticals

FAQ

What were the results of AstraZeneca's AEGEAN Phase III trial for IMFINZI?

The AEGEAN Phase III trial showed a statistically significant improvement in pathologic complete response (pCR) for IMFINZI combined with neoadjuvant chemotherapy in patients with resectable NSCLC.

How does IMFINZI improve cancer treatment outcomes?

IMFINZI works by engaging the immune response, showing promising results in improving pCR rates in lung cancer patients undergoing neoadjuvant chemotherapy.

What is the current approval status of IMFINZI?

IMFINZI is approved for treating unresectable Stage III NSCLC and is undergoing further evaluations in various clinical trials.

When will more data from the AEGEAN trial be available?

Further data, especially regarding event-free survival, will be presented at a forthcoming medical meeting when results are available.

What potential does IMFINZI have in the lung cancer market?

IMFINZI's positive interim results in trials, coupled with existing approvals, position it well within the lung cancer treatment landscape.