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Article Dans Une Revue JCI Insight Année : 2019

IFN-γ is a therapeutic target in paraneoplastic cerebellar degeneration

Résumé

Paraneoplastic neurological disorders result from an autoimmune response against neural self-antigens that are ectopically expressed in neoplastic cells. In paraneoplastic disorders associated to autoantibodies against intracellular proteins, such as paraneoplastic cerebellar degeneration (PCD), current data point to a major role of cell-mediated immunity. In an animal model, in which a neo-self-antigen was expressed in both Purkinje neurons and implanted breast tumor cells, immune checkpoint blockade led to complete tumor control at the expense of cerebellum infiltration by T cells and Purkinje neuron loss, thereby mimicking PCD. Here, we identify 2 potential therapeutic targets expressed by cerebellum-infiltrating T cells in this model, namely α4 integrin and IFN-γ. Mice with PCD were treated with anti-α4 integrin antibodies or neutralizing anti-IFN-γ antibodies at the onset of neurological signs. Although blocking α4 integrin had little or no impact on disease development, treatment using the anti-IFN-γ antibody led to almost complete protection from PCD. These findings strongly suggest that the production of IFN-γ by cerebellum-invading T cells plays a major role in Purkinje neuron death. Our successful preclinical use of neutralizing anti-IFN-γ antibody for the treatment of PCD offers a potentially new therapeutic opportunity for cancer patients at the onset of paraneoplastic neurological disorders.

Dates et versions

hal-03574605 , version 1 (15-02-2022)

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Citer

Lidia Yshii, Béatrice Pignolet, Emilie Mauré, Mandy Pierau, Monika Brunner-Weinzierl, et al.. IFN-γ is a therapeutic target in paraneoplastic cerebellar degeneration. JCI Insight, 2019, 4 (7), pp.1-12. ⟨10.1172/jci.insight.127001⟩. ⟨hal-03574605⟩
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