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Cancer tissues displayed moderate to strong cytoplasmic positivity. Majority of the cases of malignant lymphomas, ovarian, cervical, endometrial, skin, testicular, renal, stomach and liver cancers were weakly stained or negative.
Moderate cytoplasmic and membranous positivity was observed in squamous cell carcinomas of head & neck cancers. A single case each of papillary adenocarcinoma of thyroid and urothelial cancer were moderately stained. Remaining cancer tissues were in general negative.
The protein encoded by this gene is a member of the interleukin 1 cytokine family. This cytokine can bind to, and may be a ligand for interleukin 18 receptor (IL18R1/IL-1Rrp). This cytokine also binds to interleukin 18 binding protein (IL18BP), an inhibitory binding protein of interleukin 18 (IL18), and subsequently forms a complex with IL18 receptor beta subunit, and through which it inhibits the activity of IL18. This gene along with eight other interleukin 1 family genes form a cytokine gene cluster on chromosome 2. Five alternatively spliced transcript variants encoding distinct isoforms have been reported. [provided by RefSeq, Jul 2008]