Urinary N-Acetyl -β-D-Glucosaminidase (NAG) Activity in SLE Patients with Nephrotic Range Proteinuria
Objective: N-acetyl-β-D-glucosaminadase (NAG) is a enzyme which exists in the lysosomes of renal proximal tubular cells. Increased NAG activity in urine is accepted as non-invasive early index of tubular damage. Lupus nephritis is known to be the most important complication of...