Open AccessDetection of IL‐2 at mRNA and protein levels in synovial infiltrates from inflammatory arthropathies using biotinylated oligonucleotide probes in situ
Author(s) -
HOWELL W. M.,
WARREN C. J.,
COOK N. J.,
CAWLEY M. I. D.,
SMITH J. L.
Publication year - 1991
Publication title -
clinical & experimental immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.329
H-Index - 135
eISSN - 1365-2249
pISSN - 0009-9104
DOI - 10.1111/j.1365-2249.1991.tb02943.x
Subject(s) - biotinylation , oligonucleotide , in situ hybridization , in situ , immunology , messenger rna , biology , oligomer restriction , microbiology and biotechnology , virology , chemistry , dna , gene , biochemistry , organic chemistry
SUMMARY A non‐radioactive in situ hybridization method for IL‐2 mRNA detection based on the use of four biotinylated oligonucleotide probes, plus appropriate positive and negative control probes was developed and applied to synovial surgical and needle biopsies from rheumatoid arthritis (RA), spondyloarthropathy (SpA), psoriatic arthritis (PsA) and juvenile chronic arthritis (JCA) patients. In eight surgical biopsies (six RA, one SpA, one PsA) this non‐radioactive system showed similar sensitivity to that of a previously described 32 P‐labelled probe system, and in addition detected IL‐2 mRNA in five out of seven biopsies from SpA and PsA patients and in two out of two JCA needle biopsies. IL‐2 mRNA was found in the absence of IL‐2 protein in RA biopsies (six surgical, 12 needle), but variable amounts of IL‐2 protein were detected in six out of seven needle biopsies from SpA. PsA and JCA patients, where CD3 + lymphoid infiltrates were present. These data suggest differences in IL‐2 regulation and expression in RA and non‐RA inflammatory arthropathies.