Background: JAK/STAT signal pathway, a requisite part in the signaling process of growth
factors and cytokines, has become attractive targets for numerous immune, inflammatory and hematopoietic
Objective: Herein, we present a review of the JAK/STAT signal pathway, the structure, biological
function, mechanism of the JAKs and STATs along with a summary of the up-to-date clinical or approved
JAK inhibitors which are involved in the treatment of various kinds of tumors and other immunity
indications. Moreover, kinds of recently discovered JAKs inhibitors with potent activity or
promising selectivity are also briefly discussed.
Conclusion: Research and development of isoform selective JAK inhibitors has become a hot topic in this
field. With the assistance of high throughput screening and rational drug design, more and more JAK inhibitors
with improved selective profiles will be discovered as biological probes and even therapeutic agents.