Medicine and Health Sciences Commons^™

The Effects Of Metformin, Aminoguanidine, And Pyridoxamine On Methylglyoxal Induced Cardiac Myocyte Injury, Amanda Harvey, Rose Martorana, Julia Colangeli, Hafsa Ahmed, Dean Delgado, Alisa Kim, Robinderpaul Sandhu, Robert J. Barsotti, Lindon H. Young, Qian Chen

Research Day

Advanced glycation end (AGE) products have been under investigation for their role in cardiovascular disease in complications. Methylglyoxal, a byproduct of glucose metabolism, is elevated in the blood of diabetic patients and has shown to be an important intermediate in the production of AGEs. Due to the highly reactive structure of methylglyoxal, it can produce high levels of reactive oxygen species (ROS) within the cell via mitochondrial modification which results in a loss of cell membrane potential and possible cell death. The role of methylglyoxal in cardiac cells is not well known; in this study methylglyoxal induced cell injury and …

Synergistic Effects Of Methylglyoxal And Hyperglycemia On Ros Generation And The Viability Of Cultured H9c2 Myoblast Cells, Robinderpal Sandhu, Dylan Lefkovitz, Al Ibe, Alisa Kim, Peter Wieczorek, Dean Delgado, Robert J. Barsotti, Lindon H. Young, Qian Chen

Research Day

Heart damage in diabetics may be closely related to the possible synergistic cellular damage from hyperglycemia and increased methylglyoxal levels. This study investigated the effects of glucose and/or methylglyoxal and/or metformin on H9c2 reactive oxygen species (ROS) generation measured by a dichlorofluorescein diacetate (DCFDA) assay and cell viability measured by a cell counting kit-8 assay after various treatments for 24 hours.

Glucose treatment (5 mM-40 mM) displayed similar cell viability (n=4) and ROS generation (n=7) when compared to control cells. By contrast, methylglyoxal (5 µM-1400 µM) decreased cell viability at higher concentration (1000 µM (51 ± 8%); 1200 µM (41 …