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Brentuximab Vedotin

Brentuximab Vedotin

Brentuximab vedotin is a CD30-directed antibody-drug conjugate used to treat various types of lymphoma.Brentuximab vedotin, also known as Adcetris®, is an antibody-drug conjugate that combines an anti-CD30 antibody with the drug monomethyl auristatin E (MMAE). It is an antineoplastic agent used in the treatment of Hodgkin’s lymphoma and systemic anaplastic large cell lymphoma. Brentuximab vedotin was initially approved in 2011. In January 2012, the drug label was revised with a boxed warning of a condition known as progressive multifocal leukoencephalopathy and death due to opportunistic JC virus infection post treatment

The U.S. Food and Drug Administration approved Adcetris in March 2018 to treat adult patients with previously untreated stage III or IV classical Hodgkin lymphoma (cHL) in combination with chemotherapy

Adcetris has also been previously approved by the FDA to treat Hodgkin’s lymphoma after relapse, Hodgkin’s lymphoma after stem cell transplantation when a patient has a high risk of relapse or progression, systemic anaplastic large cell lymphoma (ALCL) after the failure of other treatment regimens, and primary cutaneous ALCL after failure of other treatment regimens

Lymphoma is a malignancy that begins in the lymphatic system, which helps to combat infection and disease. Lymphoma may begin anywhere in the body and can spread to nearby lymph nodes. The two main types of lymphoma are Hodgkin lymphoma (also called Hodgkin disease) and non-Hodgkin lymphoma. Most individuals with Hodgkin’s lymphoma have the classical type. In this type of lymphoma, large, abnormal lymphocytes (a type of white blood cell) are found in the lymph nodes called Reed-Sternberg cells. With early diagnosis and intervention, patients with Hodgkin lymphoma normally experience long-term remission

The ECHELON-1 study results demonstrated superior efficacy of the drug combined with a chemotherapy regimen when it is compared to the previous standard of care. Importantly, removing the drug bleomycin, a highly toxic agent, was completely removed from the regimen. This demonstrates meaningful progress in treatment for patients affected by this disease

Seattle Genetics Announced FDA Approval of ADCETRIS® (Brentuximab Vedotin) in combination with chemotherapy for adults with previously untreated stage III or IV Classical Hodgkin Lymphoma in March 2018 .

Hodgkin lymphoma after failure of autologous stem cell transplant (ASCT) or after failure of at least two prior multi-agent chemotherapy regimens in patients who are not ASCT candidates .

Systemic anaplastic large cell lymphoma after failure of at least one prior multi-agent chemotherapy regimen Brentuximab vedotin causes apoptosis of tumor cells by preventing cell cycle progression of the G2 to M phase through disruption of the cytosolic microtubule network, thus preventing tumor growth and proliferation Label.

Hodgkin lymphoma (HL) is characterized by malignant Reed-Sternberg cells which express CD30, a marker of large cell lymphoma Until March 2018, USA National Comprehensive Cancer Network guidelines for patients with advanced HL (stage III/IV disease) recommend treatment with adriamycin, bleomycin, vinblastine, and dacarbazine (ABVD), or escalated bleomycin, etoposide, adriamycin, cyclophosphamide, vincristine, procarbazine, and prednisone (BEACOPP) as first-line regimens

ABVD appears to be as effective, with fewer side effects, as escalated BEACOPP. Escalated BEACOPP leads to a greater progression-free survival but no difference in overall survival. Recent progress in technology has enabled a new shift to cancer therapy targeting specific molecules. Brentuximab vedotin, a CD30-directed antibody conjugate, selectively targets malignant HL cells

The effect of Brentuximab vedotin (1.8 mg/kg) on the QTc interval was studied in an open-label, single-group study in 46 patients diagnosed with CD30-expressing hematologic malignancies. Ingestion of brentuximab vedotin did not prolong the mean cardiac QTc interval >10 ms from baseline levels. Smaller increases in the mean QTc interval (<10 ms) cannot be ruled out because this study did not include a placebo arm and a positive control arm Label.

Mechanism of action

Brentuximab vedotin is composed of 3 parts: a chimeric human-murine IgG1 that selectively targets CD30, monomethyl auristatin E (MMAE), which is a microtubule-disrupting agent, and a protease-susceptible linker that links the antibody and MMAE. The IgG1 antibody enables Brentuximab vedotin to target tumor cells expressing CD30 on their surface. Following this Brentuximab vedotin enters the cell. Once inside, the linker is cleaved releasing MMAE which binds disrupts the microtubule network Label.

The antibody component of this drug is a chimeric IgG1 directed against CD30. The small molecule, MMAE, is a microtubule-disrupting particle. MMAE is covalently attached to the antibody by a linker. Data suggest that the anticancer activity of Adcetris is due to the binding of the ADC to CD30-expressing cells, followed by internalization of the ADC-CD30 complex, and the subsequent release of MMAE by proteolytic cleavage. Binding of MMAE to tubulin disrupts the microtubule network within the cell, inducing cell cycle arrest and apoptosis of the malignant cells

Steady-state of the ADC is achieved within 21 days with every 3-week dosing of Adcetris. Minimal to no accumulation of ADC is observed with multiple doses at the every 3-week schedule. The time to maximum concentration for MMAE ranges from approximately 1 to 3 days. Similar to the ADC, steady-state of MMAE is achieved within 21 days with every 3-week dosing of Adcetris. MMAE exposures decrease with continued administration of Adcetris with about 50% to 80% of the exposure of the first dose being observed at future doses. The AUC of MMAE was measured to be approximately 2.2-fold higher in patients with hepatic impairment in comparison with patients with normal hepatic function

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