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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nephrol+Dial+Transplant
2018 ; 33
(4
): 645-652
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Can we further enrich autosomal dominant polycystic kidney disease clinical
trials for rapidly progressive patients? Application of the PROPKD score in the
TEMPO trial
#MMPMID28992127
Cornec-Le Gall E
; Blais JD
; Irazabal MV
; Devuyst O
; Gansevoort RT
; Perrone RD
; Chapman AB
; Czerwiec FS
; Ouyang J
; Heyer CM
; Senum SR
; Le Meur Y
; Torres VE
; Harris PC
Nephrol Dial Transplant
2018[Apr]; 33
(4
): 645-652
PMID28992127
show ga
BACKGROUND: The PROPKD score has been proposed to stratify the risk of
progression to end-stage renal disease in autosomal dominant polycystic kidney
disease (ADPKD) subjects. We aimed to assess its prognostic value in a genotyped
subgroup of subjects from the Tolvaptan Phase 3 Efficacy and Safety Study in
Autosomal Dominant Polycystic Kidney Disease (TEMPO3/4) trial. METHODS: In the
post hoc analysis, PKD1 and PKD2 were screened in 770 subjects and the PROPKD
score was calculated in mutation-positive subjects (male: 1 point; hypertension
<35?years: 2 points; first urologic event <35?years: 2 points; nontruncating PKD1
mutation: 2 points; truncating PKD1 mutation: 4 points). Subjects were classified
into low-risk (LR; 0-3 points), intermediate-risk (IR; 4-6 points) and high-risk
(HR; 7-9 points) groups. RESULTS: The PROPKD score was calculated in 749 subjects
(LR?=?132, IR?=?344 and HR?=?273); age was inversely related to risk
(LR?=?43.6?years, IR?=?39.5?years, HR?=?36.2?years; P?0.001). Subjects from the
HR group had significantly higher height-adjusted total kidney volume (TKV) and
rates of TKV growth. While baseline renal function was similar across all risk
groups, the rate of estimated glomerular filtration rate (eGFR) decline
significantly increased from LR to HR in the placebo group. Tolvaptan treatment
effectiveness to reduce TKV growth was similar in all three risk categories.
While tolvaptan significantly slowed eGFR decline in the IR (tolvaptan?=?-2.34
versus placebo?=?-3.33?mL/min/1.73?m2/year; P?=?0.008) and HR groups
(tolvaptan?=?-2.74 versus placebo?=?-3.94?mL/min/1.73 m2/year; P?=?0.002), there
was no difference in the LR group (tolvaptan?=?-2.35 versus
placebo?=?-2.50?mL/min/1.73 m2/year; P?=?0.72). Excluding the LR subjects from
the analysis improved the apparent treatment effect of tolvaptan on eGFR decline.
CONCLUSION: This study confirms the prognostic value of the PROPKD score and
suggests that it could reduce costs and enhance endpoint sensitivity by enriching
future study populations for rapidly progressing ADPKD subjects.
|*Severity of Illness Index
[MESH]
|Adolescent
[MESH]
|Adult
[MESH]
|Age Factors
[MESH]
|Antidiuretic Hormone Receptor Antagonists/therapeutic use
[MESH]