Abrocitinib
未知生产厂商
Abrocitinib is a kinase inhibitor used to treat moderate-to-severe atopic dermatitis in adults.
Abrocitinib is a kinase inhibitor used to treat moderate-to-severe atopic dermatitis in adults.
Janus kinases (JAKs) are a family consisting of four receptor-associated kinases - JAK1, JAK2, JAK3, and tyrosine kinase 2 (TYK2). Upon ligand binding and subsequent dimerization of cytokine and hormone receptors, receptor-associated JAKs are activated and phosphorylated. This allows the binding of Signal Transducers and Activators of Transcription (STATs), which are transcription factors. STAT binds to the receptor, and JAK phosphorylates and activates STAT to create a STAT dimer. The STAT dimer translocates to the nucleus to upregulate the gene transcription of pro-inflammatory cytokines and growth factors implicated in atopic dermatitis. Blocking the JAK-STAT pathway is advantageous, as it is an intracellular signalling pathway where many pro-inflammatory pathways converge. Each JAK plays a role in the signalling and regulation of different cytokines and immune cells. In atopic dermatitis, JAK1 is the therapeutic target of focus as it is involved in the signalling of the γc family of cytokines involved in immune responses and disease pathophysiology, including IL-2, IL-4, IL-7, IL-9, and IL-15. Abrocitinib reversibly inhibits JAK1 by blocking the adenosine triphosphate (ATP) binding site. Biochemical assays demonstrate that abrocitinib is selective for JAK1 over JAK2 (28-fold), JAK3 (>340-fold), and tyrosine kinase (TYK) 2 (43-fold), as well as the broader kinome. Similarly, in cellular settings, abrocitinib preferentially inhibited cytokine-induced STAT phosphorylation by signalling pairs involving JAK1, while sparing signalling by JAK2/JAK2, or JAK2/TYK2 pairs. The relevance of inhibition of specific JAK enzymes to the drug's therapeutic effectiveness is currently unknown.
Abrocitinib is indicated for the treatment of moderate-to-severe atopic dermatitis in adults who are candidates for systemic therapy. In the US, it is indicated to treat refractory, moderate-to-severe atopic dermatitis whose disease is not adequately controlled with other systemic drug products, including biologics, or when the use of those therapies is inadvisable. Abrocitinib is not recommended for use in combination with other JAK inhibitors, biologic immunomodulators, or other immunosuppressants.
共 4 项相关疾病
每项发明一条，涵盖美国、欧洲、PCT 与中国的同族专利。
