Glycoprotein Acetyls (GlycA) Associate with Intraglomerular Hemodynamic Dysfunction, Albuminuria, Central Adiposity, and Insulin Resistance (IR) in Youth with Type 1 Diabetes (T1D)

GlycA is a biomarker of systemic inflammation and cardiovascular disease, yet little is known about this biomarker in T1D. We examined the associations among GlycA, central adiposity, IR, and early kidney injury in adolescents with T1D. Glomerular filtration rate (GFR) and renal plasma flow (RPF) by iohexol and p-aminohippurate clearance, respectively, urine albumin-to-creatinine ratio (UACR), central adiposity by dual-energy x-ray absorptiometry (DXA), and estimated insulin sensitivity (eIS) by the CACTI equation were assessed in youth with T1D (n=50, 16.0±3.0 years, 50% female, HbA1c 8.7±1.3%, T1D duration 5.7±2.6 years, UACR 6 [5-14] mg/g, GFR 189±40 mL/min). Intraglomerular pressure (PGLO) was estimated by the Gomez equations. Concentrations of GlycA were quantified by targeted nuclear magnetic resonance spectroscopy. Correlation and multivariable linear regression analyses were performed. GlycA was higher in girls vs. boys (1.05±0.26 vs. 0.84±0.15 mmol/L, p=0.001), and in participants who were overweight or obese vs. normal weight (1.12±0.23 vs. 0.87±0.20, p=0.0004). GlycA correlated positively with estimated PGLO (r=0.52, p=0.001), UACR (r=0.53, p<0.0001) and trunk mass (r=0.45, p=0.001) and negatively with eIS (r=-0.36, p=0.01). All relationships remained significant after adjustment for age, sex, and HbA1c. In youth with T1D, GlycA, a biomarker of inflammation, was found to be higher in girls with T1D and those of overweight/obese habitus, compared to boys with T1D. Additionally, GlycA associated with parameters of early kidney dysfunction, central adiposity, and IR. Disclosure T.Reinicke: None. S.Gross: None. D.Cherney: Other Relationship; Boehringer Ingelheim-Lilly, Merck, AstraZeneca, Sanofi, Mitsubishi-Tanabe, Abbvie, Janssen, Bayer, Prometic, BMS, Maze, Gilead, CSL-Behring, Otsuka, Novartis, Youngene, Lexicon and Novo-Nordisk, Research Support; Boehringer Ingelheim-Lilly, Merck, Janssen, Sanofi, AstraZeneca, CSL-Behring and Novo-Nordisk. T.B.Vigers: None. L.Pyle: None. L.Driscoll: None. F.H.Mahmud: None. A.Dart: None. M.E.Pavkov: None. R.G.Nelson: None. P.Bjornstad: Advisory Panel; AstraZeneca, Novo Nordisk, Lilly, Horizon Therapeutics plc, Boehringer Ingelheim (Canada) Ltd., LG Chem, Consultant; Bayer Inc., Bristol-Myers Squibb Company. A.Caldwell-mcgee: None. C.Birznieks: None. D.Carrasco: None. M.Marcovecchio: None. K.J.Nadeau: None. K.L.Tommerdahl: None. M.Pauley: None. J.K.Snell-bergeon: None. Funding Junior Research Fellowship Award