IL-11R is expressed on the cell membrane of monocytes, T cells, and B cells.

IL-11R mRNA expression was found in highly purified CD19⁺(1), CD4⁺ (2), CD4⁺CD45RA⁺ (3), CD8⁺ (4), and CD14⁺ (5) cells by RT-PCR. IL-11R mRNA was detected at the expected site (389 bp). As a positive control (CTR), we used RNA obtained from the M07 megakaryoblastic cell line, which is known to express IL-11R. To exclude amplified cDNA contamination, a sample without RNA template served as negative control (R).