Open research questions in Cytokine Signaling Pathways and Interactions

What the literature leaves open

• interactions with is The role of TAF7 in tumorigenesis remains to be firmly established. Although the present studies demonstrate a correlation between relative levels of cytoplasmic TAF7 and tumorigenesis, cytoplasmic TAF7 contributes to transformation or is a consequence remains to be determined.

  TAF7 accumulates in the cytoplasm during cellular transformation and engages STAT3, WASH, and CCT · 2026 · DOI

• STAT5B is highly similar to its paralog STAT5A; however, it differs in 12 amino acids at the C-terminus, but the functional consequence of this difference is not understood yet.

  Respiratory viruses activate autophagy via the IFN-STAT1/STAT5B-SOCS1 axis · 2026 · DOI

• The role of IL-17A in CPB-induced brain injury represents a critical yet underexplored area in the pathophysiology of post- surgical neurological complications.

  Cardiopulmonary Bypass-Induced IL-17A Aggravates Caspase-12-Dependent Neuronal Apoptosis Through the Act1-IRE1-JNK1 Pathway · 2025 · DOI

• Future research should focus on the potential synergistic effects of Y-A when used in combination with existing treatments such as chemotherapy, radiotherapy, or immune checkpoint inhibitors to enhance overall treatment efficacy [39,40].

  Yadanziolide A Inhibits Proliferation and Induces Apoptosis of Hepatocellular Carcinoma via JAK-STAT Pathway: A Preclinical Study · 2024 · DOI

• Despite extensive research, a critical aspect remains elusive: Understanding how context-specific regulation of STAT signaling is achieved.

  Threonine Phosphorylation and the Yin and Yang of STAT1: Phosphorylation-Dependent Spectrum of STAT1 Functionality in Inflammatory Contexts · 2024 · DOI

• SOX4, a transcription factor frequently overexpressed in HCC and other cancers, has been linked to drug resistance and poor prognosis; however, the underlying molecular mechanisms remain unexplored.

  SOX4-STAT6-MTHFD2 axis drives hepatocellular carcinoma progression and treatment resistance · 2026 · DOI

• Collectively, these findings demonstrate that PET-NPs act as a previously underrecognized environmental risk factor that accelerates gastric cancer progression through direct molecular interference and immune suppression, highlighting the potential public health implications of chronic microplastic exposure.

  Polyethylene terephthalate nanoplastics promote gastric cancer progression by inhibiting the TNF-α/JAK1/STAT1 signaling pathway and shaping an immunosuppressive microenvironment · 2026 · DOI

• Despite extensive research, the precise mechanisms underlying dysregulated STAT3 signaling in disease progression remain incompletely understood, and no United States Food and Drug Administration (USFDA)-approved direct STAT3 inhibitors currently exist.

  STAT3 Signaling Pathway in Health and Disease · 2025 · DOI

• Although Radioprotective 105 (RP105) modulates inflammation, its role in septic liver injury remains unclear.

  RP105 exerts hepatoprotective effects in sepsis by modulating the SOCS2/JAK2/STAT3 signaling pathway · 2025 · DOI

• Yet, the mechanism by which SIX1 modulates STAT3 and its potential to regulate EMT and BCSCs through STAT3 signaling remain unexplored.

  SIX1 transmits signals for breast cancer progression via the ZEB1/IL6/STAT3 signaling axis · 2025 · DOI

• Although persistent activation of signal transducer and activator of transcription 3 (STAT3) is implicated in its pathogenesis, the mechanisms underlying the sustained STAT3 activation remain poorly understood.

  S1PR3-driven positive feedback loop sustains STAT3 activation and keratinocyte hyperproliferation in psoriasis · 2025 · DOI

• Although signal transducers and activators of transcription 1 (STAT1) activation is known to drive I/R-induced injury, the specific post-translational modifications (PTMs) governing its activity in hepatic I/R remain poorly understood.

  SMYD2-mediated methylation of STAT1 protects against hepatic ischaemia/reperfusion injury by blocking JAK-STAT1 signalling pathways · 2025 · DOI

• The role of the Signal Transducer and Activator of Transcription 3 (Stat3) in AKI remains controversial, and its complex regulatory mechanisms must be further explored.

  Targeting Stat3 with conditional knockout or PROTAC technology alleviates renal injury by Limiting pyroptosis · 2025 · DOI

• While several examples of such cytokine plasticity have been reported, a systematic analysis of this phenomenon is lacking.

  Investigating plasticity within the interleukin-6 family with AlphaFold-Multimer · 2025 · DOI

• Suppressor of cytokine signaling 2 (SOCS2), a negative regulator of GH signaling, has been implicated in growth regulation but has not been previously studied in pediatric CKD.

  Suppressor of cytokine signaling 2 is associated with growth impairment in pediatric chronic kidney disease · 2025 · DOI

• Here, we have targeted a sparsely studied binding site at the junction of the coiled-coil and DNA-binding domains and discovered several new lead-like covalent inhibitors by virtual screening.

  Allosteric Covalent Inhibitors of the STAT3 Transcription Factor from Virtual Screening · 2025 · DOI

• Scaffold hopping is common in the design of orthosteric kinase inhibitors but has not been explored in the design of allosteric inhibitors, mainly due to the typically exclusive selectivity of type III inhibitors.

  Repurposing of the RIPK1-Selective Benzo[1,4]oxazepin-4-one Scaffold for the Development of a Type III LIMK1/2 Inhibitor · 2025 · DOI

• Yet, the precise impact of inhibitor selectivity and the complex interplay of different functional modules within normal and malignant cells remains incompletely understood.

  Malignant JAK-signaling: at the interface of inflammation and malignant transformation · 2025 · DOI

• The course of psoriasis is long and recurrence is common; pathogenesis is not completely understood.

  miR‑155 promotes an inflammatory response in HaCaT cells via the IRF2BP2/KLF2/NF‑κB pathway in psoriasis · 2024 · DOI

• Angiogenesis is critical for colorectal cancer (CRC) progression, but its mechanisms remain unclear.

  ETHE1 dampens colorectal cancer angiogenesis by promoting TC45 Dephosphorylation of STAT3 to inhibit VEGF-A expression · 2024 · DOI

• The impact of signal transducer and activator of transcription 3 (STAT3) signaling on retinal angiogenesis and its potential use as a therapeutic target remain controversial.

  Oncostatin M Reduces Pathological Neovascularization in the Retina Through Müller Cell Activation · 2024 · DOI

• However, the role of leukemia inhibitory factor (LIF), a member of the IL-6 cytokine family, and its receptor (LIFR) in atherosclerosis remains unknown.

  Leukemia inhibitory factor receptor inhibition reduces stenosis grade and total serum cholesterol levels in a mouse model for atherosclerosis · 2024 · DOI

• However, there is sparse understanding of what underpins regulation of pregnancy alloresponses and whether these are the same mechanisms as post transplantation.

  201.5: Regulation of gamma interferon and interleukin 17a human leucocyte antigen specific T Cell responses differ according to the route of sensitisation. · 2024 · DOI

• However, the relationship between its two paralogs, STAT5A and STAT5B, and the extent to which they are functionally distinct, remains unclear.

  Asymmetry and redundancy of STAT5 paralogs across CD8+ T cell differentiation states · 2026 · DOI

• Further studies are needed to understand the role of immune dysregulation in PD pathogenesis. The study's findings may be used to develop new therapeutic strategies for PD. Future research should investigate the potential of STAT5a, SOCS1, SOCS2, SOCS3, and SOCS5 genes as biomarkers for PD diagnosis.

  Reduced expression of SOCS1-5 and STAT5a genes in Parkinson’s disease patients: evidence for dysregulated immune signaling · 2026 · DOI

Most-cited papers in Cytokine Signaling Pathways and Interactions

• Jak-STAT Pathways and Transcriptional Activation in Response to IFNs and Other Extracellular Signaling Proteins · Science · 1994 · 4,859 citations
• A protein kinase involved in the regulation of inflammatory cytokine biosynthesis · Nature · 1994 · 2,695 citations
• The JAK/STAT signaling pathway: from bench to clinic · Signal Transduction and Targeted Therapy · 2021 · 2,481 citations
• JAZ repressor proteins are targets of the SCFCOI1 complex during jasmonate signalling · Nature · 2007 · 2,179 citations
• JAK–STAT Signaling as a Target for Inflammatory and Autoimmune Diseases: Current and Future Prospects · Drugs · 2017 · 1,095 citations
• Signal Transducer and Activator of Transcription‐3, Inflammation, and Cancer · Annals of the New York Academy of Sciences · 2009 · 570 citations
• Janus kinase-targeting therapies in rheumatology: a mechanisms-based approach · Nature Reviews Rheumatology · 2022 · 472 citations
• Targeting Signal‐Transducer‐and‐Activator‐of‐Transcription‐3 for Prevention and Therapy of Cancer · Annals of the New York Academy of Sciences · 2006 · 351 citations
• Itaconate and itaconate derivatives target JAK1 to suppress alternative activation of macrophages · Cell Metabolism · 2022 · 309 citations
• Current and future status of JAK inhibitors · The Lancet · 2021 · 294 citations

Most recent work

• AARS1-mediated lactylation of STAT1 drives immune evasion · Cell Reports · 2026
• An SPP1-SOCS1 pathway constrains interferon responses in tumor-associated macrophages and shapes an immunosuppressive tumor microenvironment · Immunity · 2026
• IFNγ shapes macrophage inflammatory responses by STAT1 isoform-specific epigenetic and transcriptional mechanisms · BMC Genomics · 2026
• SOX4-STAT6-MTHFD2 axis drives hepatocellular carcinoma progression and treatment resistance · Cell Death and Disease · 2026
• Trigonelline suppresses the tumor progression via STAT2 signalling pathway in non-Small cell lung carcinoma · Medical Oncology · 2026
• IL-22 supports long-term expansion of mouse and human hepatocytes · Journal of Hepatology · 2026
• AI and experimental convergence: a synergistic pathway to JAK2 inhibitor discovery · Acta Pharmacologica Sinica · 2026
• Loss of JAK1 Function Causes G2–M Cell-Cycle Defects Vulnerable to KIF18A Inhibition · Cancer Research · 2026
• STAT1 transcriptionally activates CXCL13 to promote cell inflammation and proliferation and inhibit cell apoptosis in rheumatoid arthritis fibroblast-like synoviocytes · Journal of Orthopaedic Surgery and Research · 2026
• LIF-Induced Tumor Plasticity Establishes an Immunosuppressive Myeloid Niche in LKB1 -Mutant Lung Cancer · Cancer Discovery · 2026

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