Increased urinary levels of pentosidine measured by a newly developed ELISA are independently correlated with fracture after fall.

Although we have found that increased serum levels of glyceraldehyde-derived advanced glycation end products are associated with numerous aging-related disorders, it remains unclear which structurally distinct advanced glycation end products could be a reliable biomarker of the healthy life-threatening disorders. Since pentosidine is produced by glyceraldehyde, we measured here urinary pentosidine levels with a newly developed enzyme-linked immunosorbent assay kit, which requires no pretreatment with acid hydrolysis and heat, and examined their correlations with geriatric syndrome, such as musculoskeletal disease, frailty, and cognitive impairment, in a general population. Multiple regression analysis revealed that female, age, history of fracture after fall, and taking medication for diabetes were independent correlates of log urine pentosidine-to-creatinine ratio (R2=0.190). When sex-adjusted log urine pentosidine-to-creatinine ratio stratified by smile frequency grade were compared using analysis of covariance, urine pentosidine-to-creatinine ratio was significantly decreased according to the increase in smile frequency. Our present findings suggest that measurement of urine pentosidine-to-creatinine ratio by a newly developed enzyme-linked immunosorbent assay kit may be useful for identifying high-risk patients for fall-related fractures.