Understanding Bone Damage After Kidney Transplantation: A Retrospective Monocentric Cross Sectional Analysis

Area of Science:

• Nephrology
• Orthopedics
• Pharmacology

Background:

• Kidney transplantation (KT) immunosuppression can lead to bone tissue damage, including bone mineral density (BMD) loss and increased fracture risk.
• While steroid therapy is a known factor, other contributors to post-KT bone complications require further investigation.

Purpose of the Study:

• To evaluate the prevalence of osteopenia, osteoporosis, and bone fractures in kidney transplant recipients.
• To identify risk factors associated with bone damage following kidney transplantation.

Main Methods:

• An observational retrospective cohort study involving 297 kidney transplant patients.
• Data collected included demographic factors, cumulative steroid dose (CSD), transplant history, BMD, fracture history, immunosuppressors, and biochemical markers.
• Statistical analyses included Fisher's exact test, Kruskal-Wallis test, Student t test, and univariate/multivariate analyses using Stata software.

Main Results:

• Sixty percent of patients had normal BMD, 24% osteopenia, and 15% osteoporosis.
• Twelve percent experienced bone fractures (minor, femoral, or vertebral).
• Osteopenia and osteoporosis correlated significantly with menopause, transplant age, CSD, prior glomerulonephritis, and mammalian target of rapamycin (mTOR) inhibitor use (imTOR).

Conclusions:

• Confirms a significant correlation between cumulative steroid dose (CSD) and post-transplantation bone damage.
• A substantial proportion of patients maintained normal BMD, potentially linked to lower steroid doses in the study's protocols.
• The association between imTOR treatment and osteoporosis warrants further investigation.