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IMJUDO® (tremelimumab) in Combination With IMFINZI® (durvalumab) Approved in the US for Patients With Unresectable Liver Cancer

Approval based on HIMALAYA Phase III trial results which showed single priming dose of IMJUDO added to IMFINZI reduced risk of death by 22% vs. sorafenib

AstraZeneca’s IMJUDO® (tremelimumab) in combination with IMFINZI® (durvalumab) has been approved in the US for the treatment of adult patients with unresectable hepatocellular carcinoma (HCC), the most common type of liver cancer. The novel dose and schedule of the combination, which includes a single dose of the anti-CTLA-4 antibody IMJUDO 300mg added to the anti-PD-L1 antibody IMFINZI 1500mg followed by IMFINZI every four weeks, is called the STRIDE regimen (Single Tremelimumab Regular Interval Durvalumab).

The approval by the US Food and Drug Administration (FDA) was based on positive results from the HIMALAYA Phase III trial. In this trial, patients treated with the combination of IMJUDO and IMFINZI experienced a 22% reduction in the risk of death versus sorafenib (based on a hazard ratio [HR] of 0.78, 95% confidence interval [CI] 0.66-0.92 p=0.0035).1 Results were also published in the New England Journal of Medicine Evidence showing that an estimated 31% of patients treated with the combination were still alive after three years, with 20% of patients treated with sorafenib still alive at the same duration of follow-up.2

Liver cancer is the third-leading cause of cancer death and the sixth most commonly diagnosed cancer worldwide.3,4 It is the fastest rising cause of cancer-related deaths in the US, with approximately 36,000 new diagnoses each year.5,6

Ghassan Abou-Alfa, MD, MBA, Attending Physician at Memorial Sloan Kettering Cancer Center (MSK), and principal investigator in the HIMALAYA Phase III trial, said: “Patients with unresectable liver cancer are in need of well-tolerated treatments that can meaningfully extend overall survival. In addition to this regimen demonstrating a favorable three-year survival rate in the HIMALAYA trial, safety data showed no increase in severe liver toxicity or bleeding risk for the combination, important factors for patients with liver cancer who also have advanced liver disease.”

Dave Fredrickson, Executive Vice President, Oncology Business Unit, AstraZeneca, said: “With this first regulatory approval for IMJUDO, patients with unresectable liver cancer in the US now have an approved dual immunotherapy treatment regimen that harnesses the potential of CTLA-4 inhibition in a unique combination with a PD-L1 inhibitor to enhance the immune response against their cancer.”

Andrea Wilson Woods, President & Founder, Blue Faery: The Adrienne Wilson Liver Cancer Foundation, said: “In the past, patients living with liver cancer had few treatment options and faced poor prognoses. With this approval, we are grateful and optimistic for new, innovative, therapeutic options. These new treatments can improve long-term survival for those living with unresectable hepatocellular carcinoma, the most common form of liver cancer. We appreciate the patients, their families, and the broader liver cancer community who continue to fight for new treatments and advocate for others.”

The safety profiles of the combination of IMJUDO added to IMFINZI and for IMFINZI alone were consistent with the known profiles of each medicine, and no new safety signals were identified.

Regulatory applications for IMJUDO in combination with IMFINZI are currently under review in Europe, Japan and several other countries for the treatment of patients with advanced liver cancer based on the HIMALAYA results.

IMPORTANT SAFETY INFORMATION

There are no contraindications for IMFINZI® (durvalumab) or IMJUDO® (tremelimumab-actl).

Severe and Fatal 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 clinical chemistries including liver enzymes, creatinine, adrenocorticotropic hormone (ACTH) level, and thyroid function at baseline and before each dose. 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 and IMJUDO depending on severity. See USPI Dosing and Administration for specific details. In general, if combination of IMFINZI and IMJUDO 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 in combination with IMJUDO can cause immune-mediated pneumonitis, which may be fatal. Immune‑mediated pneumonitis occurred in 1.3% (5/388) of patients receiving IMFINZI and IMJUDO, including fatal (0.3%) and Grade 3 (0.2%) adverse reactions.

Immune-Mediated Colitis

IMFINZI in combination with IMJUDO 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 or diarrhea occurred in 6% (23/388) of patients receiving IMFINZI and IMJUDO, including Grade 3 (3.6%) adverse reactions. Intestinal perforation has been observed in other studies of IMFINZI and IMJUDO.

Immune-Mediated Hepatitis

IMFINZI in combination with IMJUDO can cause immune-mediated hepatitis, which may be fatal. Immune‑mediated hepatitis occurred in 7.5% (29/388) of patients receiving IMFINZI and IMJUDO, including fatal (0.8%), Grade 4 (0.3%) and Grade 3 (4.1%) adverse reactions.

Immune-Mediated Endocrinopathies

  • Adrenal Insufficiency: IMFINZI in combination with IMJUDO 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 1.5% (6/388) of patients receiving IMFINZI and IMJUDO, including Grade 3 (0.3%) adverse reactions.
  • Hypophysitis: IMFINZI in combination with IMJUDO 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. Immune-mediated hypophysitis/hypopituitarism occurred in 1% (4/388) of patients receiving IMFINZI and IMJUDO.
  • Thyroid Disorders (Thyroiditis, Hyperthyroidism, and Hypothyroidism): IMFINZI in combination with IMJUDO 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.
    • Immune-mediated thyroiditis occurred in 1.5% (6/388) of patients receiving IMFINZI and IMJUDO.
    • Immune-mediated hyperthyroidism occurred in 4.6% (18/388) of patients receiving IMFINZI and IMJUDO, including Grade 3 (0.3%) adverse reactions.
    • Immune-mediated hypothyroidism occurred in 11% (42/388) of patients receiving IMFINZI and IMJUDO.
  • 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. Two patients 0.5% (2/388) had events of hyperglycemia requiring insulin therapy that had not resolved at last follow-up.

Immune-Mediated Nephritis with Renal Dysfunction

IMFINZI in combination with IMJUDO can cause immune-mediated nephritis. Immune-mediated nephritis occurred in 1% (4/388) of patients receiving IMFINZI and IMJUDO, including Grade 3 (0.5%) adverse reactions.

Immune-Mediated Dermatology Reactions

IMFINZI in combination with IMJUDO 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), has occurred with PD-1/L-1 and CTLA-4 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 4.9% (19/388) of patients receiving IMFINZI and IMJUDO, including Grade 4 (0.3%) and Grade 3 (1.5%) adverse reactions.

Immune-Mediated Pancreatitis

IMFINZI in combination with IMJUDO can cause immune-mediated pancreatitis. Immune-mediated pancreatitis occurred in 2.3% (9/388) of patients receiving IMFINZI and IMJUDO, including Grade 4 (0.3%) and Grade 3 (1.5%) 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 in combination with IMJUDO or were reported with the use of other immune-checkpoint inhibitors.

  • 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: 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 and IMJUDO 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 and IMJUDO based on the severity. See USPI 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 10 (2.6%) of patients receiving IMFINZI and IMJUDO.

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, both IMFINZI and IMJUDO can cause fetal harm when administered to a pregnant woman. Advise pregnant women of the potential risk to a fetus. In females of reproductive potential, verify pregnancy status prior to initiating IMFINZI and IMJUDO and advise them to use effective contraception during treatment with IMFINZI and IMJUDO and for 3 months after the last dose of IMFINZI and IMJUDO.

Lactation

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

Adverse Reactions

  • In patients with unresectable HCC in the HIMALAYA study receiving IMFINZI and IMJUDO, the most common adverse reactions (occurring in ≥20% of patients) were rash, diarrhea, fatigue, pruritus, musculoskeletal pain, and abdominal pain.
  • In patients with unresectable HCC in the HIMALAYA study receiving IMFINZI and IMJUDO, serious adverse reactions occurred in 41% of patients. Serious adverse reactions in >1% of patients included hemorrhage (6%), diarrhea (4%), sepsis (2.1%), pneumonia (2.1%), rash (1.5%), vomiting (1.3%), acute kidney injury (1.3%), and anemia (1.3%). Fatal adverse reactions occurred in 8% of patients who received IMJUDO in combination with durvalumab, including death (1%), hemorrhage intracranial (0.5%), cardiac arrest (0.5%), pneumonitis (0.5%), hepatic failure (0.5%), and immune-mediated hepatitis (0.5%). Permanent discontinuation of treatment regimen due to an adverse reaction occurred in 14% of patients.

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

Indication:

IMFINZI in combination with IMJUDO is indicated for the treatment of adult patients with unresectable hepatocellular carcinoma (uHCC).

IMPORTANT PRODUCT INFORMATION

IMFINZI in combination with IMJUDO is indicated for the treatment of adult patients with unresectable hepatocellular carcinoma (uHCC).

Immune-mediated adverse reactions, which may be severe or fatal, can occur in any organ system or tissue, including the following: immune-mediated pneumonitis, immune-mediated colitis, immune-mediated hepatitis, immune-mediated endocrinopathies, immune-mediated nephritis and renal dysfunction, immune-mediated dermatologic reactions, immune-mediated pancreatitis, and solid organ transplant rejection. IMFINZI and IMJUDO can cause severe or life-threatening infusion-related reactions. 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/PD-L1 blocking antibody.

Advise women not to become pregnant or breastfeed during treatment with IMFINZI and IMJUDO and for 3 months after the last dose.

Serious adverse reactions in >1% patients with uHCC included hemorrhage (6%), diarrhea (4%), sepsis (2.1%), pneumonia (2.1%), rash (1.5%), vomiting (1.3%), acute kidney injury (1.3%), and anemia (1.3%).

The most common adverse reactions (occurring in ≥20% of patients) were rash, diarrhea, fatigue, pruritus, musculoskeletal pain, and abdominal pain.

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

Please see Full Prescribing Information including Medication Guide for IMFINZI and IMJUDO.

Notes

Liver cancer

About 75% of all primary liver cancers in adults are HCC.3 Between 80-90% of all patients with HCC also have cirrhosis.7 Chronic liver diseases are associated with inflammation that over time can lead to the development of HCC.7

More than half of patients are diagnosed at advanced stages of the disease, often when symptoms first appear.8 A critical unmet need exists for patients with HCC who face limited treatment options.8 The unique immune environment of liver cancer provides clear rationale for investigating medications that harness the power of the immune system to treat HCC.8

HIMALAYA

HIMALAYA was a randomized, open-label, multicenter, global Phase III trial of IMFINZI monotherapy and a regimen comprising a single priming dose of IMJUDO 300mg added to IMFINZI 1500mg followed by IMFINZI every four weeks versus sorafenib, a standard-of-care multi-kinase inhibitor.

The trial included a total of 1,324 patients with unresectable, advanced HCC who had not been treated with prior systemic therapy and were not eligible for locoregional therapy (treatment localized to the liver and surrounding tissue).

The trial was conducted in 181 centers across 16 countries, including in the US, Canada, Europe, South America and Asia. The primary endpoint was overall survival (OS) for the combination versus sorafenib and key secondary endpoints included OS for IMFINZI versus sorafenib, objective response rate and progression-free survival (PFS) for the combination and for IMFINZI alone.

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.

IMFINZI was recently approved to treat patients with advanced biliary tract cancer in the US based on results from the TOPAZ-1 Phase III trial. It is the only approved immunotherapy in the curative-intent setting of unresectable, Stage III non-small cell lung cancer (NSCLC) in patients whose disease has not progressed after chemoradiotherapy 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 small cell lung cancer (ES-SCLC) based on the CASPIAN Phase III trial. In 2021, updated results from the CASPIAN trial showed IMFINZI plus chemotherapy tripled patient survival at three years versus chemotherapy alone.

IMFINZI is also 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 gastrointestinal (GI) cancers, ovarian cancer, endometrial cancer, and other solid tumors.

IMFINZI combinations have also demonstrated clinical benefit in metastatic NSCLC in the POSEIDON Phase III trial.

IMJUDO

IMJUDO® (tremelimumab) is a human monoclonal antibody that targets the activity of cytotoxic T-lymphocyte-associated protein 4 (CTLA-4). IMJUDO blocks the activity of CTLA-4, contributing to T-cell activation, priming the immune response to cancer and fostering cancer cell death.

Beyond HIMALAYA, IMJUDO is being tested in combination with IMFINZI across multiple tumor types including locoregional HCC (EMERALD-3), SCLC (ADRIATIC) and bladder cancer (VOLGA and NILE).

IMJUDO is also under review by global regulatory authorities in combination with IMFINZI and chemotherapy in 1st-line metastatic NSCLC based on the results of the POSEIDON Phase III trial, which showed the addition of a short course of IMJUDO to IMFINZI plus chemotherapy improved both overall and progression-free survival compared to chemotherapy alone.

AstraZeneca in GI cancers

AstraZeneca has a broad development program for the treatment of GI cancers across several medicines spanning a variety of tumor types and stages of disease. In 2020, GI cancers collectively represented approximately 5.1 million new diagnoses leading to approximately 3.6 million deaths.9

Within this program, the Company is committed to improving outcomes in gastric, liver, biliary tract, esophageal, pancreatic, and colorectal cancers.

IMFINZI is being assessed in combinations in esophageal and gastric cancers in an extensive development program spanning early to late-stage disease across settings.

The Company aims to understand the potential of fam-trastuzumab deruxtecan-nxki, a HER2-directed antibody drug conjugate, in the two most common GI cancers, colorectal and gastric cancers. Fam-trastuzumab deruxtecan-nxki is jointly developed and commercialized by AstraZeneca and Daiichi Sankyo.

Olaparib is a first-in-class PARP inhibitor with a broad and advanced clinical trial program across multiple GI tumor types including pancreatic and colorectal cancers. Olaparib is developed and commercialized in collaboration with Merck & Co., Inc., known as MSD outside the US and Canada.

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 IMJUDO 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. Please visit www.astrazeneca-us.com and follow the Company on Twitter @AstraZenecaUS.

References

  1. Imfinzi and Imjudo US prescribing information; 2022.
  2. Abou-Alfa, et al. Tremelimumab plus Durvalumab in Unresectable Hepatocellular Carcinoma. NEJM Evid. 2022;1-12.
  3. ASCO. Liver Cancer: View All Pages. Available at: https://www.cancer.net/cancer-types/liver-cancer/view-all. Accessed October 2022.
  4. WHO. Liver Cancer Fact Sheet. Available at: https://gco.iarc.fr/today/data/factsheets/cancers/11-Liver-fact-sheet.pdf. Accessed October 2022.
  5. Rawla, P, et al. Update in global trends and aetiology of hepatocellular carcinoma. Contemp Oncol (Pozn). 2018; 22(3): 141–150.
  6. CDC. Liver Cancer. Available at: https://www.cdc.gov/cancer/liver/index.htm. Accessed: October 2022.
  7. Tarao K, et al. Real impact of liver cirrhosis on the development of hepatocellular carcinoma in various liver diseases—meta‐analytic assessment. Cancer Med. 2019;8(3):1054-1065.
  8. Colagrande S, et al. Challenges of advanced hepatocellular carcinoma. World J Gastroenterol. 2016;22(34):7645-7659.
  9. WHO. World Cancer Fact Sheet. Available at: https://gco.iarc.fr/today/data/factsheets/cancers/39-All-cancers-fact-sheet.pdf. Accessed October 2022.

US-66853 Last Updated 10/22

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