Is maraviroc useful in multiple sclerosis patients with natalizumab-related progressive multifocal leukoencephalopathy

BACKGROUND:

Despite the recent advances in the understanding of natalizumab (NTZ) related progressive multifocal leukoencephalopathy (PML) and its associated immune reconstitution inflammatory syndrome (PML-IRIS), the therapeutic options are still under investigated. In this context, the beneficial use of maraviroc is still an anecdotal observation.

OBJECTIVE:

To evaluate the impact of maraviroc in modifying the course of PML preventing IRIS or blunting IRIS manifestations.

METHODS:

Three patients with NTZ PML included in the Italian dataset of PML were treated with maraviroc. Their longitudinal clinical and radiological course was described in detail.

RESULTS:

The three patients were characterized by a steady clinical worsening not controlled by maraviroc. All the three patients manifested PML-IRIS, which emerged, respectively, at 62, 64 and 90days post NTZ withdrawal. This is in accordance with the data of the Italian dataset. Clinical and radiological stabilization of PML-IRIS occurred only after corticosteroids administration.

CONCLUSION:

In these three cases, maraviroc did not show any clear effect in modulating the clinical course of PML preventing IRIS. Moreover, once PML-IRIS emerged, the clinical stabilization was achieved only with the use of corticosteroids. Thus, the use of maravirocshould be regarded with extreme caution due the potential adverse events associated with its use.

Related Products

Cat.No.	Product Name	Information
S2003	Maraviroc	Maraviroc is a CCR5 antagonist for MIP-1α, MIP-1β and RANTES with IC50 of 3.3 nM, 7.2 nM and 5.2 nM in cell-free assays, respectively. Maraviroc is used in the treatment of HIV infection.

Related Targets

CCR