DARZALEX CONCENTRATE FOR SOLUTION FOR INFUSION 100MG/5ML

Daratumumab

Source of information: Drugbank (External Link). Last updated on: 3rd July 18
*Trade Name used in the content below may not be the same as the HSA-registered product.

Active Ingredient / Synonyms

HuMax-CD38 | Daratumumab |

Description

Daratumumab is an anti-cancer drug indicated for multiple myeloma in patients who have received at least 3 prior treatments. It was granted accelerated approval by the FDA in November 2016. Marketed under the brand name Darzalex by Janssen Biotech, daratumumab is the first monoclonal antibody injection approved for this indication and provides another options for patients with multiple myeloma resistant to other therapies. Daratumumab induces apoptosis of cancer cells by targeting the CD38 epitope, which is highly expressed on haematological malignancies.

Indication

For the treatment of patients with multiple myeloma who have received at least three prior lines of therapy (a proteasome inhibitor (PI) and an immunomodulatory agent) or who are double-refractory to a PI and an immunomodulatory agent. This indication was approved by accelerated approval based on response rate.

Mechanism of Action

Daratumumab is an immunoglobulin G1 kappa monoclonal antibody against CD38 antigen. CD38 is a transmembrane glycoprotein of many functions, including receptor mediated adhesion, signaling, and modulation of cyclase and hydrolase activity. CD38 is expressed on many cell types and tissues, and highly expressed in haematological malignancies including multiple myeloma tumor cells. By binding CD38, daratumumab causes inhibition of tumor cell growth and induces broad-spectrum apoptosis in multiple ways: by Fc-mediated cross linking, by immune-mediate tumor cell lysis through complement dependent cytotoxicity, antibody dependent cell cytotoxicity, and antibody dependent cellular phagocytosis.

Pharmacodynamics

In preclinical trials, daratumumab showed synergistic activity with other multiple myeloma therapies, notably lenalidomide. Daratumumab also causes lysis in other cells that express CD38: myeloid-derived suppressor cells, a subset of regulatory T-cells, and NK cells. Decreases in absolute count and percentage of NK cells were observed during treatment. CD4+ and CD8+ T cell absolute counts as well the percentage of total lymphocytes increased in peripheral blood and bone marrow during daratumumab treatment.

Pharmacokinetics

Absorption:

Following the recommended schedule and dose of 16 mg/kg, the mean serum Cmax value was 915 μg/mL at the end of weekly dosing, approximately 2.9-fold higher than following the first infusion. The mean predose serum concentration at the end of weekly dosing was 573 μg/mL.

Distribution:

4.7 L

Metabolism:

Not Available

Elimination:

Not Available

Half-life

Approximately 18 days.

Clearance

171.4 mL/day. Clearance decreased with increasing dose and repeated dosing, indicating target-mediated pharmacokinetics.

Toxicity

Immunoglobulin G1 (IgG1) monoclonal antibodies are transferred across the placenta. Due to its mechanism of action, daratumumab may cause fetal myeloid or lymphoid-cell depletion and decreased bone density. The FDA label recommends to defer administering live vaccines to neonates and infants exposed to daratumumab in utero until a hematology evaluation is completed. Women of reproductive potential should also should use effective contraception methods during treatment and 3 months post-treatment to avoid pregnancy and exposure to the fetus while on daratumumab.

References

  1. Health Science Authority of Singapore - Reclassified POM
  2. Drugbank

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Approval Information

DARZALEX CONCENTRATE FOR SOLUTION FOR INFUSION 100MG/5ML was registered with Health Science Authority of Singapore by JOHNSON & JOHNSON PTE LTD. It is marketed with the registration number of SIN15110P with effective from 2016-10-26.

This product contains 20mg/mL of Daratumumab in the form of INTRAVENOUS INFUSION, SOLUTION CONCENTRATE.

The medicine was manufactured by Vetter Pharma-Fertigung GmbH & Co. KG in GERMANY

It is a Presciption Only Medicine which can only be obtained from a doctor or a dentist, or from a pharmacist with a prescription from a Singapore-registered doctor or dentist.

Anatomical Therapeutic Chemical (ATC) Classification

ATC Code: L01XC24

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