IL-17 family cytokines such as IL-17 (aka IL-17A), the closely related IL-17F and IL-25 have been implicated in the pathogenesis of various inflammatory and auto-immune diseases. In order to devise strategies to disable signaling by these cytokines in diseases, it is imperative to understand the pathways and molecular mechanisms by which these cytokines transmit signals in target cells to effect gene expression. In the past we have cloned an adaptor protein that is absolutely required for signaling by IL-17 family cytokines. In FY 2010 we have generated mutant versions of this adaptor gene and packaged them into several different vector delivery systems. These mutant adaptors will be tested for their functions with several different assays we have established in FY 2010;the goal is to identify critical amino acid determinants on CIKS that can potentially be targeted for therapeutic intervention. To date relatively little is known about the receptors that mediate signaling by the various IL-17 cytokine family members. In FY2010 we have generated tagged versions of the receptor genes and packaged them into various vector delivery systems in order to probe interactions between various receptor chains and interaction with downstream signaling proteins, including CIKS. IL-25 is the most divergent member of the IL-17 cytokine family. It is associated with Th2-type innate and adaptive immune responses, but little is known about its regulation. In FY 2010 we have generated reporter mouse to help identify biologic contexts in which this cytokine is expressed and the cell types that are responsible.

Project Start
Project End
Budget Start
Budget End
Support Year
2
Fiscal Year
2010
Total Cost
$753,909
Indirect Cost
City
State
Country
Zip Code
Valente, Anthony J; Sakamuri, Siva S V P; Siddesha, Jalahalli M et al. (2013) TRAF3IP2 mediates interleukin-18-induced cardiac fibroblast migration and differentiation. Cell Signal 25:2176-84
Venkatesan, Balachandar; Valente, Anthony J; Das, Nitin A et al. (2013) CIKS (Act1 or TRAF3IP2) mediates high glucose-induced endothelial dysfunction. Cell Signal 25:359-71
Valente, Anthony J; Yoshida, Tadashi; Clark, Robert A et al. (2013) Advanced oxidation protein products induce cardiomyocyte death via Nox2/Rac1/superoxide-dependent TRAF3IP2/JNK signaling. Free Radic Biol Med 60:125-35
Valente, Anthony J; Yoshida, Tadashi; Izadpanah, Reza et al. (2013) Interleukin-18 enhances IL-18R/Nox1 binding, and mediates TRAF3IP2-dependent smooth muscle cell migration. Inhibition by simvastatin. Cell Signal 25:1447-56
Valente, Anthony J; Clark, Robert A; Siddesha, Jalahalli M et al. (2012) CIKS (Act1 or TRAF3IP2) mediates Angiotensin-II-induced Interleukin-18 expression, and Nox2-dependent cardiomyocyte hypertrophy. J Mol Cell Cardiol 53:113-24
Pisitkun, Prapaporn; Ha, Hye-Lin; Wang, Hongshan et al. (2012) Interleukin-17 cytokines are critical in development of fatal lupus glomerulonephritis. Immunity 37:1104-15
Sønder, Søren Ulrik; Paun, Andrea; Ha, Hye-Lin et al. (2012) CIKS/Act1-mediated signaling by IL-17 cytokines in context: implications for how a CIKS gene variant may predispose to psoriasis. J Immunol 188:5906-14
Sonder, Soren Ulrik; Saret, Sun; Tang, Wanhu et al. (2011) IL-17-induced NF-kappaB activation via CIKS/Act1: physiologic significance and signaling mechanisms. J Biol Chem 286:12881-90
Pisitkun, Prapaporn; Claudio, Estefania; Ren, Nina et al. (2010) The adaptor protein CIKS/Act1 is necessary to induce collagen-induced arthritis pathology and it contributes to collagen-specific antibody production. Arthritis Rheum :
Claudio, Estefania; Sønder, Søren Ulrik; Saret, Sun et al. (2009) The adaptor protein CIKS/Act1 is essential for IL-25-mediated allergic airway inflammation. J Immunol 182:1617-30