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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 J+Am+Soc+Nephrol
2014 ; 25
(6
): 1331-41
Nephropedia Template TP
gab.com Text
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English Wikipedia
Kidney transplantation with early corticosteroid withdrawal: paradoxical effects
at the central and peripheral skeleton
#MMPMID24511131
Iyer SP
; Nikkel LE
; Nishiyama KK
; Dworakowski E
; Cremers S
; Zhang C
; McMahon DJ
; Boutroy S
; Liu XS
; Ratner LE
; Cohen DJ
; Guo XE
; Shane E
; Nickolas TL
J Am Soc Nephrol
2014[Jun]; 25
(6
): 1331-41
PMID24511131
show ga
The use of early corticosteroid withdrawal (ECSW) protocols after kidney
transplantation has become common, but the effects on fracture risk and bone
quality are unclear. We enrolled 47 first-time adult transplant recipients
managed with ECSW into a 1-year study to evaluate changes in bone mass,
microarchitecture, biomechanical competence, and remodeling with dual energy
x-ray absorptiometry (DXA), high-resolution peripheral quantitative computed
tomography (HRpQCT), parathyroid hormone (PTH) levels, and bone turnover markers
obtained at baseline and 3, 6, and 12 months post-transplantation. Compared with
baseline, 12-month areal bone mineral density by DXA did not change significantly
at the spine and hip, but it declined significantly at the 1/3 and ultradistal
radii (2.2% and 2.9%, respectively; both P<0.001). HRpQCT of the distal radius
revealed declines in cortical area, density, and thickness (3.9%, 2.1%, and 3.1%,
respectively; all P<0.001), trabecular density (4.4%; P<0.001), and stiffness and
failure load (3.1% and 3.5%, respectively; both P<0.05). Findings were similar at
the tibia. Increasing severity of hyperparathyroidism was associated with
increased cortical losses. However, loss of trabecular bone and bone strength
were most severe at the lowest and highest PTH levels. In summary, ECSW was
associated with preservation of bone mineral density at the central skeleton;
however, it was also associated with progressive declines in cortical and
trabecular bone density at the peripheral skeleton. Cortical decreases related
directly to PTH levels, whereas the relationship between PTH and trabecular bone
decreases was bimodal. Studies are needed to determine whether pharmacologic
agents that suppress PTH will prevent cortical and trabecular losses and
post-transplant fractures.