Volume 39 (1992) Issue 1 Pages 109-114
Some of luteinizing hormone (LH) isoforms can stimulate renal growth. The objective of this study is to determine whether the administration of LH modifies subtotal nephrectomy-induced chronic renal failure. Castrated 3/4-nephrectomized male rats were divided into four groups of seven each and fed a low-protein (6%) diet. Ovine LH with renotropic activity (40μg/day) or vehicle only (control) was given for three weeks or six weeks. Compared with controls, remnant kidney weights (% body weight) in LH-treated rats had increased significantly at three weeks (0.385±0.019 vs 0.443±0.052, P<0.02), but not at six weeks (0.281±0.004 vs 0.272±0.013). 24h creatinine clearance (ml/day/l00g body weight) increased significantly both by three weeks (242±58 vs 301±36, P<0.05), and six weeks (323±55 vs 395±10, P<0.01). Urinary thromboxane B2 excretion increased in LH-treated rats, suggesting that hemodynamic changes may play a role in increasing creatinine clearance. Our results suggest that renotropically active oLH stimulated the glomerular function in castrated rats with reduced renal mass. Further study may clarify its clinical usefulness.