Predictors of decline in renal function after lung transplantation

Area of Science:

• Nephrology
• Transplantation Medicine
• Pulmonology

Background:

• Long-term toxicities of lung transplantation treatments are increasingly important as survival rates improve.
• Renal impairment is a common, multifactorial complication after lung transplantation, associated with increased morbidity and mortality.

Purpose of the Study:

• To identify risk factors associated with renal function decline in lung and heart-lung transplant recipients.
• To determine predictors of end-stage renal failure after lung transplantation.

Main Methods:

• Retrospective analysis of clinical and laboratory data from 136 lung and heart-lung transplant patients (1990-2004).
• Multivariate analysis to assess the impact of age, gender, diagnosis, transplant type, comorbidities, smoking, immunosuppression, calcineurin inhibitor (CNI) exposure, and baseline renal function on renal function.

Main Results:

• A significant decline in glomerular filtration rate (GFR) was observed from 108 ml/min/1.73 m(2) at baseline to 56.7 ml/min/1.73 m(2) at follow-up (p < 0.001).
• Five patients (3.7%) developed end-stage renal failure (ESRF).
• Key factors associated with renal decline included baseline creatinine clearance (CrCl), smoking history (pack-years), sirolimus (SLM) exposure, CNI exposure, and age at transplantation.

Conclusions:

• Patients with lower baseline CrCl, older age, and a history of smoking are at high risk for rapid renal function loss post-lung transplantation.
• Aggressive risk factor modification and minimizing CNI exposure are recommended to preserve kidney function in high-risk individuals.