Long-term stability of bone mineral density in kidney transplant recipients treated with low-dose steroids and cyclosporine: protective effect of cyclosporine?

被引:0
|
作者
Ezaitouni, F
Westeel, PF [1 ]
Fardellone, P
Mazouz, H
Brazier, M
El Esper, I
Sebert, JL
Petit, J
Westeel, A
Pruna, A
Fournier, A
机构
[1] CHU Amiens, Hop Sud, Serv Nephrol, F-80054 Amiens 01, France
[2] CHU Amiens, Hop Sud, Serv Rhumatol, F-80054 Amiens, France
[3] CHU Amiens, Hop Sud, Serv Hormonol, F-80054 Amiens 01, France
[4] CHU Amiens, Hop Sud, Nucl Med Serv, F-80054 Amiens 01, France
[5] CHU Amiens, Hop Sud, Serv Urol, F-80054 Amiens 01, France
[6] CHU Amiens, Hop Sud, Serv Radiol, F-80054 Amiens 01, France
来源
PRESSE MEDICALE | 1998年 / 27卷 / 15期
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暂无
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
OBJECTIVES: Cyclosporine has been thought to have a deleterious effect on bone in transplant recipients because of high turnover osteopenia observed in humans after transplantation. However, varying confounding factors such as renal and parathyroid function, cumulative steroid doses and previous exposure to aluminium, also play a role and hinder interpretation of the cyclosporine effect on bone mineral density (BMD). PATIENTS AND METHODS: A 2-year prospective study was conducted to measure BMD starting 3 months after transplantation and bone remodeling markers from the first post-transplantation day in 52 kidney recipients with no prior exposure to aluminum. None of the patients experienced rejection and at 3 months all had good stable renal function (serum creatinine 137 mu mol/l) and mildly elevated parathyroid hormone levels (1.5 times the upper limit of normal). All patients were given the same low dose steroid treatment (10 mg/day) and at 6 months cyclosporine was decreased from 7 to 4.8 mg/kg/day. RESULTS: BMD measured by double energy X-ray absorptiometry, (DEXA) and expressed in Z score, was moderately decreased at 3 months for the vertebrae (-1.40), the femoral neck (-1.34) and the ultradistal radius (-0.95) which have predominantly cancellous bone and was significantly less decreased (p<0.05) for the lower third of the radius (-0.6) which is mainly cortical bone. BMD measurements were comparable at 6, 12 and 24 months. When measured by axial computerized tomography (ACT) BMD of the vertebrae showed a non-significant increase of Z score from -1.37 to -1.19 at 2 years. Bone remodelling markers was observed up to month 6 (from month 3 for osteocalcine and from month 1 for total and bone alkaline phosphatase and urinary pyridinoline), then returned to baseline levels at 2 years in parallel with decreased cyclosporine dosage. The increase of vertebral BMD measured by ACT at 1 year was correlated both to cyclosporine dose at 1 year and to bone alkaline phosphatase at 6 months. CONCLUSION: Our data confirm the presence of moderate osteopenia 3 months after transplantation, predominantly in trabecular bone, logically linked to the initial high doses of corticosteroids, The long-term stability of BMD measured by DEXA and the correlation of vertebral BMD increase measured by ACI with cyclosporine dose and bone alkaline phosphate suggest that cyclosporine had a beneficial immunosuppressor effect by stimulating bone remodeling and thus counterbalancing the suppressive effect of corticosteroids. (C) 1998, Masson, Paris.
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页码:705 / 712
页数:8
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