The invention belongs to the technical field of biological medicines, and particularly relates to application of h018JAK as an
active component in preparation of a
medicine for treating
myelofibrosis. The h018JAK is used as an inhibitor to specifically inhibit a JAK-STAT
signal channel and block the
cascade amplification effect mediated by
tumor necrosis factor alpha (TNF-alpha),
interleukin (IL)-1 and IL-6 cytokines, so that the symptoms of the damaged joint of the RA patient are improved. The JAK1 inhibitor provides a treatment choice for RA patients, breaks through the treatment approach of traditional
rheumatism drugs and
biological drugs, is still effective for patients with poor
treatment response of traditional DMARD and
TNF inhibitors, improves the health-related
life quality of the patients, is exact in safety, and is more popular with the patients in
oral treatment.