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Erschienen in: Osteoporosis International 6/2015

01.06.2015 | Original Article

Cortical thinning and progressive cortical porosity in female patients with systemic lupus erythematosus on long-term glucocorticoids: a 2-year case-control study

verfasst von: T. Y. Zhu, J. F. Griffith, L. Qin, V. W. Y. Hung, T.-N. Fong, S.-K. Au, X.-L. Tang, E. W. Kun, A. W. Kwok, P.-C. Leung, E. K. LI, L.-S. Tam

Erschienen in: Osteoporosis International | Ausgabe 6/2015

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Abstract

Summary

In this study, we characterized longitudinal changes of volumetric bone mineral density and cortical and trabecular microstructure at the distal radius using HR-pQCT in female systemic lupus erythematosus (SLE) patients on long-term glucocorticoids. Cortical thinning and increased cortical porosity are the major features of longitudinal microstructural deterioration in SLE patients.

Introduction

The study aims to characterize longitudinal changes of volumetric bone mineral density (vBMD) and bone microstructure at distal radius in female systemic lupus erythematosus (SLE) patients on long-term glucocorticoids.

Methods

This 2-year case-control study consisted of 166 premenopausal subjects (75 SLE patients and 91 controls) and 79 postmenopausal subjects (44 SLE patients and 35 controls). We obtained areal BMD (aBMD) by dual-energy X-ray absorptiometry at multiple skeletal sites and indices of vBMD and microstructure at distal radius by high-resolution peripheral quantitative computed tomography (HR-pQCT) at baseline, 12 and 24 months.

Results

In either premenopausal or postmenopausal subjects, changes in aBMD did not differ between patients and controls except that decrease in aBMD at total hip at 24 months in premenopausal patients was significantly higher. In premenopausal subjects, decrease in cortical area (−0.51 vs. −0.06 %, p = 0.039) and thickness (−0.63 vs. 0.02 %, p = 0.031) and increase in cortical porosity (21.7 vs. 7.16 %, p = 0.030) over study period were significantly larger in patients after adjustment of age and body mass index. Decreased in trabecular vBMD was significantly less (−0.63 vs. −2.32 %, p = 0.001) with trabecular microstructure better maintained in patients. In postmenopausal subjects, decrease in cortical vBMD (−2.66 vs. −1.56 %, p = 0.039) and increase in cortical porosity (41.6 vs. 16.3 %, p = 0.021) were significantly higher in patients, and there was no group-wise difference in change of trabecular microstructure.

Conclusion

Longitudinal microstructural deterioration in SLE is characterized by cortical thinning and increased cortical porosity. Cortical bone is an important source of bone loss in SLE patients on glucocorticoids.
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Metadaten
Titel
Cortical thinning and progressive cortical porosity in female patients with systemic lupus erythematosus on long-term glucocorticoids: a 2-year case-control study
verfasst von
T. Y. Zhu
J. F. Griffith
L. Qin
V. W. Y. Hung
T.-N. Fong
S.-K. Au
X.-L. Tang
E. W. Kun
A. W. Kwok
P.-C. Leung
E. K. LI
L.-S. Tam
Publikationsdatum
01.06.2015
Verlag
Springer London
Erschienen in
Osteoporosis International / Ausgabe 6/2015
Print ISSN: 0937-941X
Elektronische ISSN: 1433-2965
DOI
https://doi.org/10.1007/s00198-015-3077-2

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