Alterations in Janus kinase (JAK)-signal transducers and activators of transcription (STAT) signaling in patients with end-stage dilated cardiomyopathy
- PMID: 12591746
- DOI: 10.1161/01.cir.0000057545.82749.ff
Alterations in Janus kinase (JAK)-signal transducers and activators of transcription (STAT) signaling in patients with end-stage dilated cardiomyopathy
Abstract
Background: Experimental studies indicate that interleukin-6 (IL-6)-related cytokines, signaling via the shared receptor gp130, Janus kinases (JAKs), and signal transducers and activators of transcription (STATs), provide a critical cardiomyocyte survival pathway in vivo. Little is known about the activation of this signaling pathway in the myocardia of patients with end-stage dilated cardiomyopathy (DCM).
Methods and results: We performed a comprehensive expression and activation analysis of IL-6-related cytokines, receptors, signal transducers, and signal transduction inhibitors in left ventricular (LV) myocardia from patients with DCM (n=10) and non-failing (NF) donor hearts (n=5). Differential expression (DCM versus NF) was observed by immunoblotting at each level of the signaling cascade, including receptor ligands (IL-6: -59%, P<0.01; leukemia inhibitory factor [LIF]: +54%, P<0.05), receptor subunits (LIF receptor: -16%, P<0.05), signaling molecules (the Janus kinase TYK2: -48%, P<0.01; STAT3: -47%, P<0.01), and suppressors of cytokine signaling (SOCS1: +97%, P<0.05; SOCS3: -49%, P<0.01). Tyrosine-phosphorylation status of gp130 was increased (+60%, P<0.05), whereas tyrosine-phosphorylation status of JAK2 was reduced in DCM (-72%, P<0.01). Moreover, as shown by immunohistochemistry, the number of STAT3-positive cardiomyocytes was reduced in DCM (-42%, P<0.01).
Conclusion: Signaling via gp130 and JAK-STAT is profoundly altered in DCM. Importantly, tyrosine-phosphorylation of JAK2 is reduced in the face of increased gp130 phosphorylation, indicating impaired downstream activation of this critical pathway in DCM.
Comment in
-
What are appropriate controls for cardiac interleukin-6 expression in heart failure?Circulation. 2003 Oct 28;108(17):e129-30; author reply e129-30. doi: 10.1161/01.CIR.0000096409.32921.B8. Circulation. 2003. PMID: 14581394 No abstract available.
Similar articles
-
Augmented expression of cardiotrophin-1 in failing human hearts is accompanied by diminished glycoprotein 130 receptor protein abundance.Circulation. 2002 Sep 17;106(12):1442-6. doi: 10.1161/01.cir.0000033117.39335.df. Circulation. 2002. PMID: 12234945
-
Cytokine signaling in 2002: new surprises in the Jak/Stat pathway.Cell. 2002 Apr;109 Suppl:S121-31. doi: 10.1016/s0092-8674(02)00701-8. Cell. 2002. PMID: 11983158 Review.
-
Differential inhibition of IL-6-type cytokine-induced STAT activation by PMA.FEBS Lett. 2000 Jul 28;478(1-2):100-4. doi: 10.1016/s0014-5793(00)01826-3. FEBS Lett. 2000. PMID: 10922477
-
Contributions of leukemia inhibitory factor receptor and oncostatin M receptor to signal transduction in heterodimeric complexes with glycoprotein 130.J Immunol. 1999 Dec 15;163(12):6651-8. J Immunol. 1999. PMID: 10586060
-
Interleukin-6-type cytokine signalling through the gp130/Jak/STAT pathway.Biochem J. 1998 Sep 1;334 ( Pt 2)(Pt 2):297-314. doi: 10.1042/bj3340297. Biochem J. 1998. PMID: 9716487 Free PMC article. Review.
Cited by
-
STAT protein family and cardiovascular diseases: overview of pathological mechanisms and therapeutic implications.Mol Biol Rep. 2024 Mar 23;51(1):440. doi: 10.1007/s11033-024-09371-2. Mol Biol Rep. 2024. PMID: 38520542 Review.
-
The Effect of Empagliflozin on Janus Kinase 2/Signal Transducer and Activator of Transcription 3 Pathway in Patients with Type 2 Cardiorenal Syndrome.Anatol J Cardiol. 2024 Mar 6;28(5):229-35. doi: 10.14744/AnatolJCardiol.2024.2736. Online ahead of print. Anatol J Cardiol. 2024. PMID: 38445622 Free PMC article.
-
Evolving cognition of the JAK-STAT signaling pathway: autoimmune disorders and cancer.Signal Transduct Target Ther. 2023 May 19;8(1):204. doi: 10.1038/s41392-023-01468-7. Signal Transduct Target Ther. 2023. PMID: 37208335 Free PMC article. Review.
-
The MEF2A transcription factor interactome in cardiomyocytes.Cell Death Dis. 2023 Apr 5;14(4):240. doi: 10.1038/s41419-023-05665-8. Cell Death Dis. 2023. PMID: 37019881 Free PMC article.
-
Bioinformatics prediction of potential mechanisms and biomarkers underlying dilated cardiomyopathy.World J Cardiol. 2022 May 26;14(5):282-296. doi: 10.4330/wjc.v14.i5.282. World J Cardiol. 2022. PMID: 35702326 Free PMC article.
Publication types
MeSH terms
Substances
LinkOut - more resources
Full Text Sources
Medical
Miscellaneous