PMID- 24209691 OWN - NLM STAT- MEDLINE DCOM- 20140902 LR - 20220310 IS - 1475-2840 (Electronic) IS - 1475-2840 (Linking) VI - 12 DP - 2013 Nov 9 TI - High sensitive C-reactive protein and serum amyloid A are inversely related to serum bilirubin: effect-modification by metabolic syndrome. PG - 166 LID - 10.1186/1475-2840-12-166 [doi] AB - BACKGROUND: Bilirubin has been implicated in cardiovascular protection by virtue of its anti-inflammatory and anti-oxidative properties. The metabolic syndrome is featured by enhanced low-grade systemic inflammation and oxidative stress. Serum amyloid A (SAA) impairs anti-oxidative properties of high-density lipoprotein (HDL). We determined relationships of high sensitive C-reactive protein (hs-CRP) and SAA with bilirubin in subjects with and without metabolic syndrome (MetS). METHODS: Serum total bilirubin, hs-CRP, SAA and homeostasis model assessment- insulin resistance (HOMA-IR) were documented in 94 subjects with and in 73 subjects without MetS (26 and 54 subjects with type 2 diabetes mellitus (T2DM), respectively). RESULTS: Bilirubin was lower in MetS (P = 0.013), coinciding with higher hs-CRP (P < 0.001) and SAA levels (P = 0.002). In all subjects combined, hs-CRP was inversely related to bilirubin (r = -0.203, P = 0.008), irrespective of the presence of MetS or T2DM (interaction terms: P >/= 0.75). The inverse relationship of bilirubin with SAA was confined to subjects without MetS (r = -0.267, P = 0.009). Furthermore, the presence of either MetS or T2DM modified the relationship of bilirubin with SAA (interaction terms: beta = 0.366, P = 0.003 and beta = 0.289, P = 0.025, respectively) in age- and sex-adjusted analyses. Effect modification was also found for HOMA-IR (beta = 0.790, P = 0.020). Of the individual MetS components, the strongest interaction of bilirubin on SAA was observed with low HDL cholesterol (beta = 0.435, P < 0.001). CONCLUSIONS: hs-CRP is inversely related to bilirubin, suggesting that low bilirubin is implicated in enhanced low-grade systemic inflammation. The inverse relationship of SAA with bilirubin was found to be absent in MetS, which could be attributable to MetS-associated abnormalities in HDL characteristics. FAU - Deetman, Petronella E AU - Deetman PE FAU - Bakker, Stephan J L AU - Bakker SJ FAU - Dullaart, Robin P F AU - Dullaart RP AD - Department of Endocrinology, University of Groningen, University Medical Center Groningen, P,O, Box 30,001, Groningen 9700 RB, The Netherlands. r.p.f.dullaart@umcg.nl. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131109 PL - England TA - Cardiovasc Diabetol JT - Cardiovascular diabetology JID - 101147637 RN - 0 (Cholesterol, HDL) RN - 0 (Serum Amyloid A Protein) RN - 9007-41-4 (C-Reactive Protein) RN - RFM9X3LJ49 (Bilirubin) SB - IM MH - Aged MH - Bilirubin/*blood MH - C-Reactive Protein/*metabolism MH - Case-Control Studies MH - Cholesterol, HDL/*metabolism MH - Diabetes Mellitus, Type 2/complications/*metabolism MH - Female MH - Humans MH - Insulin Resistance MH - Linear Models MH - Male MH - Metabolic Syndrome/complications/*metabolism MH - Middle Aged MH - Multivariate Analysis MH - Serum Amyloid A Protein/*metabolism PMC - PMC4176750 EDAT- 2013/11/12 06:00 MHDA- 2014/09/03 06:00 PMCR- 2013/11/09 CRDT- 2013/11/12 06:00 PHST- 2013/09/20 00:00 [received] PHST- 2013/10/28 00:00 [accepted] PHST- 2013/11/12 06:00 [entrez] PHST- 2013/11/12 06:00 [pubmed] PHST- 2014/09/03 06:00 [medline] PHST- 2013/11/09 00:00 [pmc-release] AID - 1475-2840-12-166 [pii] AID - 10.1186/1475-2840-12-166 [doi] PST - epublish SO - Cardiovasc Diabetol. 2013 Nov 9;12:166. doi: 10.1186/1475-2840-12-166.