MBL2 and diabetic kidney disease: Li et al. [40] reported a relationship between the serum and urinary levels of mannose-binding lectin (MBL), a lectin pathway associated with the activation of various complement cascades including C1q, C4d, C3a, and C5a, the levels of which were positively correlated with Scr, proteinuria, eGFR, and glomerular lesions in DKD patients.