PLASMA ENDOTHELIN-1 LEVELS AND ALBUMINURIA IN PATIENTS WITH TYPE 2 DIABETES MELLITUS.

Introduction: Microalbuminuria is a very important independent risk factor for the progression of renal diseases as well as diseases of the cardiovascular system. Pathophysiological mechanisms that lead to the development ofmicroalbuminuria in patients with diabetes are complex and they are a result of numerous factors. In the past decade, endothelin-1, the most potent vasoconstrictor peptide, was identified as animportant factor that significantly contributes to the functional and structural renal changes. The objective of this study was to investigate the relationship between plasma concentration of endothelin-1 and urinary albumin excretion in patients with type 2 diabetes mnellitus.

Material And Methods: There were 76 patients with type 2 diabetes who were divided into those having normoalbuminuria (n-33), microalbuminuria (n=29) and macroalbuinuria (n=14), and 30 healthy controls. Plasma levels of endothelin-1 were measured by enzyme-linked immunosorbent assay.

Results: There were significant differences in plasma concentration of endothelin-1 among groups (P<0.01). The correlation between endothelin-1. albuminuria. proteinuria and glomercular filtration rate was significant. In multiple regression analyses the plasma concentration of endothelin-l was independently and significantly associated with albuminuria (β=0.01, p=0.009), proteinuria =.02, p<0.001) and glon.erular filtration rate (P3=0βl. pO-.P=)6).0Conclu- sion. Higher plasma concentrations of endothelin-1 are independently associated with the levels of urinary, excretion of albumin Whicw May morroborate tlse hpothesis of apotenstial role of this peptide inl th de- vepment of microalbUminuriauin diabetic necphrpathy.