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Characterization of the interleukin-17 isoforms and receptors in lesional psoriatic skin. 2009

C Johansen, and P A Usher, and R B Kjellerup, and D Lundsgaard, and L Iversen, and K Kragballe
Department of Dermatology, Aarhus University Hospital, DK-8000 Aarhus C, Denmark. claus.johansen@ki.au.dk

BACKGROUND Th17 cells are a lineage of proinflammatory T helper cells producing interleukin (IL)-17. The importance of Th17 cells in inflammation and autoimmunity has now been recognized. The IL-17 cytokine family consists of six isoforms (IL-17A-IL-17F) whereas five members of the IL-17 receptor (IL-17R) family have been identified (IL-17RA-IL-17RE). OBJECTIVE To characterize the expression of the IL-17 isoforms and receptors in lesional and nonlesional psoriatic skin. Methods Keratome and punch biopsies taken from patients with psoriasis were examined by enzyme-linked immunosorbent assay and quantitative reverse transcription-polymerase chain reaction in order to measure the IL-17 isoforms and receptors. RESULTS We demonstrated significantly increased mRNA expression of IL-17A, IL-17C and IL-17F in psoriatic skin. In contrast, the mRNA expression of IL-17B and IL-17D was significantly decreased in lesional compared with nonlesional skin, while IL-17E mRNA was undetectable. The increased mRNA expression of IL-17A, IL-17C and IL-17F was paralleled by an increased protein accumulation of these cytokines in psoriatic skin. Analysis of the IL-17R mRNA expression revealed significantly impaired mRNA expression of IL-17RB, IL-17RC, IL-17RD and IL-17RE in lesional psoriatic skin, whereas the mRNA expression of IL-17RA was similar in lesional and nonlesional psoriatic skin. CONCLUSIONS This study characterizes the mRNA profile of the IL-17 isoforms and receptors in psoriatic skin lesions. Furthermore, we demonstrate for the first time augmented protein levels of IL-17A, IL-17C and IL-17F in psoriatic skin lesions, indicating a possible role for IL-17C in addition to IL-17A and IL-17F in the pathogenesis of psoriasis.

UI MeSH Term Description Entries
D011565 Psoriasis A common genetically determined, chronic, inflammatory skin disease characterized by rounded erythematous, dry, scaling patches. The lesions have a predilection for nails, scalp, genitalia, extensor surfaces, and the lumbosacral region. Accelerated epidermopoiesis is considered to be the fundamental pathologic feature in psoriasis. Palmoplantaris Pustulosis,Pustular Psoriasis of Palms and Soles,Pustulosis Palmaris et Plantaris,Pustulosis of Palms and Soles,Psoriases
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012333 RNA, Messenger RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm. Messenger RNA,Messenger RNA, Polyadenylated,Poly(A) Tail,Poly(A)+ RNA,Poly(A)+ mRNA,RNA, Messenger, Polyadenylated,RNA, Polyadenylated,mRNA,mRNA, Non-Polyadenylated,mRNA, Polyadenylated,Non-Polyadenylated mRNA,Poly(A) RNA,Polyadenylated mRNA,Non Polyadenylated mRNA,Polyadenylated Messenger RNA,Polyadenylated RNA,RNA, Polyadenylated Messenger,mRNA, Non Polyadenylated
D014158 Transcription, Genetic The biosynthesis of RNA carried out on a template of DNA. The biosynthesis of DNA from an RNA template is called REVERSE TRANSCRIPTION. Genetic Transcription
D015870 Gene Expression The phenotypic manifestation of a gene or genes by the processes of GENETIC TRANSCRIPTION and GENETIC TRANSLATION. Expression, Gene,Expressions, Gene,Gene Expressions
D053722 Receptors, Interleukin-17 Cell surface receptors for INTERLEUKIN-17. Several subtypes of receptors have been found, each with its own in specificity for interleukin-17 subtype. Antigens, CDw217,Cdw217 Antigens,IL-17 Receptors,Il-17 Receptor,Interleukin-17 Receptors,CDw217 Antigen,Interleukin-17 Receptor,Interleukin-17 Receptor A,Interleukin-17 Receptor B,Interleukin-17 Receptor C,Interleukin-17 Receptor D,Interleukin-17 Receptor E,Antigen, CDw217,IL 17 Receptors,Il 17 Receptor,Interleukin 17 Receptor,Interleukin 17 Receptor A,Interleukin 17 Receptor B,Interleukin 17 Receptor C,Interleukin 17 Receptor D,Interleukin 17 Receptor E,Interleukin 17 Receptors,Receptor, Il-17,Receptor, Interleukin-17,Receptors, IL-17,Receptors, Interleukin 17
D020033 Protein Isoforms Different forms of a protein that may be produced from different GENES, or from the same gene by ALTERNATIVE SPLICING. Isoform,Isoforms,Protein Isoform,Protein Splice Variant,Splice Variants, Protein,Protein Splice Variants,Isoform, Protein,Isoforms, Protein,Splice Variant, Protein,Variant, Protein Splice,Variants, Protein Splice
D020133 Reverse Transcriptase Polymerase Chain Reaction A variation of the PCR technique in which cDNA is made from RNA via reverse transcription. The resultant cDNA is then amplified using standard PCR protocols. Polymerase Chain Reaction, Reverse Transcriptase,Reverse Transcriptase PCR,PCR, Reverse Transcriptase,Transcriptase PCR, Reverse
D020381 Interleukin-17 A proinflammatory cytokine produced primarily by T-LYMPHOCYTES or their precursors. Several subtypes of interleukin-17 have been identified, each of which is a product of a unique gene. IL-17,CTLA-8,CTLA8,Cytokine CX2,Cytokine ML-1,Cytotoxic T lymphocyte-Associated Antigen 8,IL-17A,IL-17B,IL-17C,IL-17E,IL-17F,Interleukin 17,Interleukin-17A,Interleukin-17B,Interleukin-17C,Interleukin-17E,Interleukin-17F,Interleukin-25,CX2, Cytokine,Cytokine ML 1,Cytotoxic T lymphocyte Associated Antigen 8,IL 17E,Interleukin 17A,Interleukin 17B,Interleukin 17C,Interleukin 17E,Interleukin 17F,Interleukin 25

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