PMID- 24126065 OWN - NLM STAT- MEDLINE DCOM- 20150330 LR - 20151119 IS - 1477-0970 (Electronic) IS - 1352-4585 (Linking) VI - 20 IP - 6 DP - 2014 May TI - Ribosomal protein S6 mRNA is a biomarker upregulated in multiple sclerosis, downregulated by interferon treatment, and affected by season. PG - 675-85 LID - 10.1177/1352458513507819 [doi] AB - BACKGROUND: Multiple Sclerosis (MS) is an immune-mediated disease of the central nervous system which responds to therapies targeting circulating immune cells. OBJECTIVE: Our aim was to test if the T-cell activation gene expression pattern (TCAGE) we had previously described from whole blood was replicated in an independent cohort. METHODS: We used RNA-seq to interrogate the whole blood transcriptomes of 72 individuals (40 healthy controls, 32 untreated MS). A cohort of 862 control individuals from the Brisbane Systems Genetics Study (BSGS) was used to assess heritability and seasonal expression. The effect of interferon beta (IFNB) therapy on expression was evaluated. RESULTS: The MS/TCAGE association was replicated and rationalized to a single marker, ribosomal protein S6 (RPS6). Expression of RPS6 was higher in MS than controls (p<0.0004), and lower in winter than summer (p<4.6E-06). The seasonal pattern correlated with monthly UV light index (R=0.82, p<0.002), and was also identified in the BSGS cohort (p<0.0016). Variation in expression of RPS6 was not strongly heritable. RPS6 expression was reduced by IFNB therapy. CONCLUSIONS: These data support investigation of RPS6 as a potential therapeutic target and candidate biomarker for measuring clinical response to IFNB and other MS therapies, and of MS disease heterogeneity. FAU - Parnell, Grant P AU - Parnell GP AD - Westmead Millennium Institute, University of Sydney, Sydney, New South Wales, Australia. FAU - Gatt, Prudence N AU - Gatt PN FAU - McKay, Fiona C AU - McKay FC FAU - Schibeci, Stephen AU - Schibeci S FAU - Krupa, Malgorzata AU - Krupa M FAU - Powell, Joseph E AU - Powell JE FAU - Visscher, Peter M AU - Visscher PM FAU - Montgomery, Grant W AU - Montgomery GW FAU - Lechner-Scott, Jeannette AU - Lechner-Scott J FAU - Broadley, Simon AU - Broadley S FAU - Liddle, Christopher AU - Liddle C FAU - Slee, Mark AU - Slee M FAU - Vucic, Steve AU - Vucic S FAU - Stewart, Graeme J AU - Stewart GJ FAU - Booth, David R AU - Booth DR LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131014 PL - England TA - Mult Scler JT - Multiple sclerosis (Houndmills, Basingstoke, England) JID - 9509185 RN - 0 (Biomarkers) RN - 0 (Immunologic Factors) RN - 0 (RNA, Messenger) RN - 0 (Ribosomal Protein S6) RN - 63231-63-0 (RNA) RN - 77238-31-4 (Interferon-beta) SB - IM MH - Adult MH - Biomarkers/analysis MH - Down-Regulation MH - Female MH - Humans MH - Immunologic Factors/*therapeutic use MH - Interferon-beta/*therapeutic use MH - Male MH - Middle Aged MH - Multiple Sclerosis/diagnosis/drug therapy/*metabolism MH - RNA/genetics MH - RNA, Messenger/*blood MH - Ribosomal Protein S6/*metabolism MH - *Seasons MH - Young Adult OTO - NOTNLM OT - Multiple sclerosis OT - RPS6 OT - biomarkers OT - interferon beta OT - season EDAT- 2013/10/16 06:00 MHDA- 2015/03/31 06:00 CRDT- 2013/10/16 06:00 PHST- 2013/10/16 06:00 [entrez] PHST- 2013/10/16 06:00 [pubmed] PHST- 2015/03/31 06:00 [medline] AID - 1352458513507819 [pii] AID - 10.1177/1352458513507819 [doi] PST - ppublish SO - Mult Scler. 2014 May;20(6):675-85. doi: 10.1177/1352458513507819. Epub 2013 Oct 14.