JAK2
JAK2 (Janus kinase 2) is a non-receptor tyrosine kinase that plays a critical role in cellular signaling and immune regulation.
JAK2 (Janus kinase 2) is a non-receptor tyrosine kinase that plays a critical role in cellular signaling and immune regulation. As a member of the Janus kinase family, JAK2 functions as a key signal transducer that associates with cytokine receptors and phosphorylates downstream targets, particularly the Signal Transducer and Activator of Transcription (STAT) proteins. The protein is essential for mediating signaling from hematopoietic cytokine receptors involved in immune cell development, including effects on macrophages, dendritic cells, and natural killer cells. JAK2 has emerged as an important therapeutic target for various disease conditions, particularly inflammatory disorders, malignancies, and autoimmune diseases such as rheumatoid arthritis. Additionally, activating mutations in the JAK2 gene are associated with myeloproliferative neoplasms, including polycythaemia vera, a clonal disease characterized by increased thromboembolic risk.
The JAK2/STAT signaling cascade represents one of the most significant intracellular communication pathways in immunology and inflammation. Upon cytokine binding to cell surface receptors, JAK2 becomes activated and phosphorylates both the receptor and downstream STAT proteins, which then translocate to the nucleus to regulate gene transcription. This pathway controls inflammatory responses through modulation of pro-inflammatory mediators including tumor necrosis factor-α (Tnf-α) and Interleukin-6 (IL-6), making JAK2 inhibition an attractive therapeutic strategy for conditions characterized by excessive inflammation or pathologic immune activation.
Where the papers sit
13 papers from the last 6 months study JAK2 directly · updated from PubMed 3 Oct 2026
Study type 2 clinical trials · 3 human data · 7 preclinical · 1 unclassified
Themes 3 themes
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JAK2/STAT Signaling Therapies
JAK2/STAT pathway modulation is being explored across inflammatory disease, infection, cancer, and tissue injury. Most studies test natural products or small molecules that suppress IL-6-driven STAT3 signaling and improve organ or inflammatory outcomes. One strategy instead activates JAK2 to protect against chemotherapy-induced myelosuppression, highlighting opposing therapeutic goals. Translation remains limited by heterogeneous preclinical models and sparse clinical validation.
8 papers · 61.5%
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JAK Inhibition in GVHD
JAK inhibition is moving into both prevention and treatment of graft-versus-host disease after haploidentical transplantation. Low-dose ruxolitinib is being tested to reduce incident GVHD, while baricitinib is directed at refractory chronic disease. Cumulative incidence, neutropenia, infection, and other transplantation outcomes remain central safety and efficacy measures. Evidence is still early, relying on multicentre and phase 1/2 clinical studies rather than definitive comparative trials.
2 papers · 15.4%
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Others — Disease-Specific Clinical Assessment
Clinical assessment spans topical treatment and delivery approaches for moderate atopic dermatitis alongside metabolomic diagnosis of polycythaemia vera. Ruxolitinib cream is being compared with systemic therapies using real-world severity and body-surface-area measures, while microneedles aim to improve transdermal sulforaphane delivery. Serum metabolomics pursues disease-specific signatures and diagnostic panels in polycythaemia vera. The cluster has no single biological or clinical direction beyond disease-focused evaluation.
3 papers · 23.1%
Papers
The 13 papers from the last 6 months that study JAK2 directly, newest first, by theme and by study type. Study types come from PubMed publication types and MeSH headings.
By theme
JAK2/STAT Signaling Therapies (8)
- Discovery of CDK8/19 inhibitors as lead compounds for IL-6-dependent lymphoma enabled by the formal synthesis of cortistatin A. Science advances · 4 Sept 2026 PMID 42696577
- Design and Synthesis of Type-A Proanthocyanidin Derivatives as JAK2 Activators to Protect against Chemotherapy-Induced Myelosuppression. Journal of medicinal chemistry · 13 Aug 2026 PMID 42593935
- Sinomenine Liposomes Alleviate Neuropathic Pain in a Spared Nerve Injury Model by Regulating Astrocyte Reactivity Associated with Inhibition of the JAK2/STAT3 Pathway. Neurochemical research · 13 Aug 2026 PMID 42593631
- Callistephus A from Callistephus chinensis Alleviates DSS-Induced Ulcerative Colitis and Gut-liver Axis Disruption by Targeting the JAK2/STAT1 Pathway and Remodeling Gut Microbiota. Journal of ethnopharmacology · 20 Jul 2026 PMID 42476206
- Type II JAK2 Inhibitor Gets Off to a Strong Start. Cancer discovery · 1 Jul 2026 PMID 42381481
- Network pharmacology and experimental validation reveal inhibition of the JAK2/STAT3 pathway by hydrogen sulfide in diabetic cardiomyopathy. International immunopharmacology · 8 Jun 2026 PMID 42259239
- Chinese authentic herbal medicine Ganhuangcao from Southwest China mitigates influenza virus infection by inhibiting the host JAK2/STAT1 signaling pathway. Phytomedicine : international journal of phytotherapy and phytopharmacology · 20 May 2026 PMID 42160896
- Yupingfeng San extract ameliorates cisplatin induced renal interstitial fibrosis via IL-6/JAK/STAT3 mediated restoration of mitochondrial homeostasis. Journal of ethnopharmacology · 7 May 2026 PMID 42097338
JAK Inhibition in GVHD (2)
- Low-dose ruxolitinib for graft-versus-host disease prevention in haploidentical haematopoietic stem-cell transplantation: a multicentre, open-label, randomised, controlled, phase 3 trial. The Lancet. Haematology · 30 Jul 2026 PMID 42532067
- Baricitinib for refractory chronic graft-versus-host disease: results of a phase 1/2 study. Blood advances · 27 May 2026 PMID 42200447
Others — Disease-Specific Clinical Assessment (3)
- Real-world clinical experience with ruxolitinib cream versus systemic therapies in patients with moderate atopic dermatitis in the United States. The Journal of dermatological treatment · 7 Sept 2026 PMID 42704072
- LC-QQQ serum metabolomics reveals disease-specific metabolic signatures and diagnostic metabolite panels distinguishing polycythaemia vera from secondary polycythaemia. Metabolomics : Official journal of the Metabolomic Society · 3 Jul 2026 PMID 42397475
- Study on transdermal delivery system of sulforaphane chitosan nanoparticles based on methacryloylated chitosan microneedles: application in the treatment of irritant contact dermatitis. International journal of pharmaceutics · 14 Jun 2026 PMID 42289208
By study type
Clinical trials (2)
- Low-dose ruxolitinib for graft-versus-host disease prevention in haploidentical haematopoietic stem-cell transplantation: a multicentre, open-label, randomised, controlled, phase 3 trial. The Lancet. Haematology · 30 Jul 2026 PMID 42532067
- Baricitinib for refractory chronic graft-versus-host disease: results of a phase 1/2 study. Blood advances · 27 May 2026 PMID 42200447
Human data, design not indexed (3)
- Real-world clinical experience with ruxolitinib cream versus systemic therapies in patients with moderate atopic dermatitis in the United States. The Journal of dermatological treatment · 7 Sept 2026 PMID 42704072
- LC-QQQ serum metabolomics reveals disease-specific metabolic signatures and diagnostic metabolite panels distinguishing polycythaemia vera from secondary polycythaemia. Metabolomics : Official journal of the Metabolomic Society · 3 Jul 2026 PMID 42397475
- Type II JAK2 Inhibitor Gets Off to a Strong Start. Cancer discovery · 1 Jul 2026 PMID 42381481
Preclinical: animal, cell and lab studies (7)
- Discovery of CDK8/19 inhibitors as lead compounds for IL-6-dependent lymphoma enabled by the formal synthesis of cortistatin A. Science advances · 4 Sept 2026 PMID 42696577
- Design and Synthesis of Type-A Proanthocyanidin Derivatives as JAK2 Activators to Protect against Chemotherapy-Induced Myelosuppression. Journal of medicinal chemistry · 13 Aug 2026 PMID 42593935
- Sinomenine Liposomes Alleviate Neuropathic Pain in a Spared Nerve Injury Model by Regulating Astrocyte Reactivity Associated with Inhibition of the JAK2/STAT3 Pathway. Neurochemical research · 13 Aug 2026 PMID 42593631
- Study on transdermal delivery system of sulforaphane chitosan nanoparticles based on methacryloylated chitosan microneedles: application in the treatment of irritant contact dermatitis. International journal of pharmaceutics · 14 Jun 2026 PMID 42289208
- Network pharmacology and experimental validation reveal inhibition of the JAK2/STAT3 pathway by hydrogen sulfide in diabetic cardiomyopathy. International immunopharmacology · 8 Jun 2026 PMID 42259239
- Chinese authentic herbal medicine Ganhuangcao from Southwest China mitigates influenza virus infection by inhibiting the host JAK2/STAT1 signaling pathway. Phytomedicine : international journal of phytotherapy and phytopharmacology · 20 May 2026 PMID 42160896
- Yupingfeng San extract ameliorates cisplatin induced renal interstitial fibrosis via IL-6/JAK/STAT3 mediated restoration of mitochondrial homeostasis. Journal of ethnopharmacology · 7 May 2026 PMID 42097338
Unclassified: not yet indexed with MeSH (1)
- Callistephus A from Callistephus chinensis Alleviates DSS-Induced Ulcerative Colitis and Gut-liver Axis Disruption by Targeting the JAK2/STAT1 Pathway and Remodeling Gut Microbiota. Journal of ethnopharmacology · 20 Jul 2026 PMID 42476206
Written from 13 PubMed abstracts, each one listed by PMID above. Published: 2026-07-26. Last written: 2026-08-27 by GPT. Drafted by language models from published abstracts; not medical advice.