AstraZeneca and Daiichi Sankyo’s Enhertu Delays Breast Cancer Progression by Over a Year in Large Late-Stage Trial

AstraZeneca Plc and Daiichi Sankyo Co. announced that their cancer treatment, Enhertu, has delayed the growth of a common type of breast cancer by more than a year in a large late-stage trial. This development offers new hope for patients suffering from this aggressive form of the disease.

Key Findings

  • Effectiveness of Enhertu:

    • When used as an initial treatment, Enhertu reduced the risk of worsening or death from HER2-positive breast cancer within 18 months by 34% compared to chemotherapy alone.
    • The median time for cancer progression was approximately 11 months with Enhertu, compared to about 6 months with chemotherapy.
  • Patient Impact:

    • David Fredrickson, executive vice president of AstraZeneca’s oncology business unit, highlighted that one in three patients starting treatment for this type of cancer cannot receive a second therapy due to health deterioration or death. He expressed optimism that Enhertu could significantly improve these outcomes.

Current Approvals and Mechanism

  • Enhertu is already approved as an initial treatment for HER2-positive stomach and esophageal cancers.
  • The drug works by targeting HER2 receptors, which are proteins found on certain tumor types.

Related Developments in Cancer Treatments

  • Pfizer Inc.’s Braftovi:

    • This pill has doubled survival time for patients with an aggressive form of colorectal cancer compared to standard treatment in late-stage trials.
    • It targets the BRAF V600E mutation, which is present in 10% to 15% of colorectal cancer patients. The survival rate for these patients is notably low, with just over half living five years post-diagnosis.
  • Gilead Sciences Inc.’s Trodelvy:

    • Trodelvy has shown promising results as an initial treatment in combination with Merck & Co.’s Keytruda for triple-negative breast cancers (TNBC), reducing the risk of disease worsening by 35%.
  • Merck & Co.:

    • Recently withdrew its US application for a treatment after it failed a key test.
  • Amgen Inc.’s Imdeltyra:

    • This drug has been shown to reduce the risk of death among small-cell lung cancer patients whose disease worsened after initial chemotherapy, according to data from a late-stage trial.

These advancements in cancer treatment highlight the ongoing efforts to improve patient outcomes and provide new therapeutic options for aggressive cancer types.

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