Date: 2018-02-28

Type of information: Acceptation for review of a NDA

Product name: calaspargase pegol (Cal-PEG - SHP663)

Compound: calaspargase pegol

Therapeutic area: Cancer - Oncology

Action mechanism:

  • enzyme/protein. Calaspargase pegol is an intravenous formulation containing E. coli-derived L-asparaginase II conjugated with succinimidyl carbonate monomethoxypolyethylene glycol (SC-PEG)
  • . L-asparaginase hydrolyzes L-asparagine to L-aspartic acid and ammonia, thereby depleting cells of asparagine; asparagine depletion blocks protein synthesis and tumor cell proliferation, especially in the G1 phase of the cell cycle and ultimately induces tumor cell death. Asparagine is critical to protein synthesis in acute lymphoblastic leukemia (ALL) cells which, unlike normal cells, cannot synthesize this amino acid due to the absence of the enzyme asparagine synthase. Pegylation decreases enzyme antigenicity and increases its half life. SC is used as a PEG linker to facilitate attachment to asparaginase and enhances the stability of the formulation.

Company: Shire (UK - USA)

Disease: acute lymphoblastic leukemia (ALL)

Latest news:

  • • On February 28, 2018, Shire announced that the FDA has accepted the Biologics License Application (BLA) for Calaspargase Pegol (Cal-PEG; SHP663). The investigational-stage compound is being reviewed as a component of a multi-agent chemotherapeutic regimen for the treatment of patients with acute lymphoblastic leukemia (ALL). The FDA has set a Prescription Drug User Fee Act (PDUFA) target action date of December 22, 2018 for Cal-PEG.
  • Shire is developing SHP663 based on more than a decade of data, research and experience with Oncaspar® (pegaspargase), which is approved in the United States as a first-line treatment for patients with ALL.
  • Cal-PEG is thought to be based on plasma L-asparagine depletion. The totality of the clinical trial data submitted to the FDA for review, as part of the BLA, included a comparable safety profile and efficacy outcomes to Oncaspar®.


Submission of marketing authorization application USA :

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Is general: Yes