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2017 ; 32
(6
): 969-975
Nephropedia Template TP
Grantham JJ
; Chapman AB
; Blais J
; Czerwiec FS
; Devuyst O
; Gansevoort RT
; Higashihara E
; Krasa H
; Zhou W
; Ouyang J
; Perrone RD
; Torres VE
Nephrol Dial Transplant
2017[Jun]; 32
(6
): 969-975
PMID27190355
show ga
BACKGROUND: Autosomal-dominant polycystic kidney disease (ADPKD) is characterized
by multitudes of expanding renal cysts associated with mononuclear interstitial
infiltrates. Monocyte chemotactic protein-1 is produced in the kidneys and
excreted in the urine (uMCP1) of these patients in increased amounts. In the
TEMPO 3:4 trial, tolvaptan slowed the rate of increase in total kidney volume
(TKV) and the rate of decline in estimated glomerular filtration rate (eGFR). In
a sub-analysis, we determined whether tolvaptan administration for up to 3 years
changed the urinary excretion of MCP-1 referenced to creatinine in 869 treated
subjects compared with 438 placebo subjects. METHODS: Treatment group differences
of uMCP1 at 0.75, 12, 24 and 36 months were evaluated by ANCOVA with factor of
treatment and covariate baseline. RESULTS: At baseline, mean uMCP1 was 429 ± 224
pg/mg in the tolvaptan and 434 ± 233 pg/mg in the placebo groups, ?4-fold greater
than normal. Log uMCP1 associated positively with log TKV ( r = 0.2645, P <
0.0001) and negatively with eGFR ( r = -0.1555 P < 0.0001) and fasting urine
osmolality ( r = -0.1933, P < 0.0001). Tolvaptan reduced uMCP1 13.8 ± 4.4% (P <
0.0001) below placebo-treated subjects at 24 months and 14.4 ± 3.7% (P < 0.0001)
at 36 months, and to the same extent in females and males. The effect of
tolvaptan on uMCP1 excretion at 36 months extended across CKD Stage 1 (11.1 ±
6.4%, P = 0.0595), CKD 2 (13.9 ± 5.4%, P = 0.0050) and CKD 3 (21.4 ± 8.0%, P =
0.0020). CONCLUSION: Tolvaptan, administered for 3 years to patients with ADPKD,
caused a sustained reduction in the urinary excretion of MCP-1 relative to
placebo.
|Adult
[MESH]
|Antidiuretic Hormone Receptor Antagonists/*pharmacology/therapeutic use
[MESH]
|Benzazepines/*pharmacology/therapeutic use
[MESH]