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Australian biotech company Starpharma announces positive interim results from the prostate cancer cohort in its ongoing phase 2 trial of DEP® cabazitaxel

  • Written by PR Newswire

MELBOURNE, Australia, Nov. 26, 2021 /PRNewswire/ -- Starpharma showed that 100% of evaluable patients with Stage IV prostate cancer have had efficacy responses, utilising one or more standard measures of disease.

DEP® cabazitaxel[1] is a patented, detergent (polysorbate-80[1])-free, nanoparticle version of the conventional cancer drug, Jevtana® - a leading oncology agent used to treat advanced prostate cancer. Sales of Jevtana® exceeded US$600 million in 2020.

Starpharma[2]'s interim results in Stage IV prostate cancer show that one or more efficacy signals[2] were observed in 100% of patients assessed following DEP® cabazitaxel treatment.

  • 64% of patients with assessable tumours saw prolonged stable disease and significant reductions in tumour size for up to 36 weeks
  • 90% of patients with assessable PSA (Prostate Specific Antigen) tumour biomarker levels had a PSA reduction; >50% of these patients achieved a PSA reduction of at least 50%
  • 83% of patients with secondary bone disease exhibited either no progression or an improvement in bone disease
  • 56% of evaluable patients had responses to all three measures evaluated

Starpharma's positive interim results[3] are particularly significant given all patients in this cohort had late-stage prostate cancer and had failed multiple anti-cancer treatments, in addition to surgeries and radiation, prior to entering the DEP® cabazitaxel trial.

Importantly, patients treated with DEP® cabazitaxel also experienced less severe bone marrow toxicity, significantly lower rates of severe neutropenia and no instances of neutropenic sepsis, which are associated with conventional cabazitaxel. The absence of detergent-like polysorbate-80 in the DEP® cabazitaxel formulation eliminated the need for prophylactic corticosteroids and antihistamines, with no anaphylaxis or severe hypersensitivity reactions observed. This avoidance of long-term steroid use is attractive, particularly in prostate cancer patients where bone health can be a significant issue.

DEP® cabazitaxel is one of Starpharma's three internal clinical-stage DEP® assets, alongside DEP® docetaxel and DEP® irinotecan, which Starpharma intends to licence following phase 2. Starpharma also has a number of partnered DEP® programs including with AstraZeneca and Merck & Co., Inc.

[1] Polysorbate 80 is a detergent-like substance, which is used to solubilise insoluble molecules, and which is a component of conventional cabazitaxel products, including Jevtana® and generic forms.

[2] Efficacy in the prostate cancer cohort in the trial was assessed referencing the applicable aspects of the internationally recognised Prostate Cancer Working Group (PCWG3) guidelines.

 

References

  1. ^ DEP® cabazitaxel (starpharma.com)
  2. ^ Starpharma (starpharma.com)
  3. ^ Starpharma's positive interim results (starpharma.com)

Read more https://www.prnasia.com/story/archive/3588631_AE88631_0

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