Prognostic effect of changes in high-density lipoprotein cholesterol after kidney transplantation

Area of Science:

• Nephrology
• Cardiology
• Transplantation Medicine

Background:

• High-density lipoprotein cholesterol (HDL-C) is linked to reduced cardiovascular disease risk and potential kidney function protection.
• Understanding HDL-C dynamics post-kidney transplant is crucial for predicting patient outcomes.

Purpose of the Study:

• To investigate the association between early changes in HDL-C levels and clinical outcomes in kidney transplant recipients (KTRs).
• To determine the prognostic significance of different HDL-C trajectories (low-low, low-normal, normal-low, normal-normal) after transplantation.

Main Methods:

• Retrospective analysis of 4,446 KTRs, categorizing them based on pre-transplant and 6-month post-transplant HDL-C levels.
• Primary outcome defined as a composite of cardiovascular events and graft failure.
• Cox regression analysis to assess the risk associated with various HDL-C level changes.

Main Results:

• KTRs with persistently normal HDL-C levels exhibited the lowest incidence of adverse outcomes.
• Persistent low HDL-C, low-to-normal improvement, and normal-to-low decline were associated with increased composite outcome risk (HRs ranging from 1.41 to 2.09).
• Low HDL-C levels primarily correlated with cardiovascular events, while declining HDL-C post-transplant was more strongly linked to graft failure.

Conclusions:

• Abnormal HDL-C trajectories following kidney transplantation are significantly associated with adverse long-term cardiovascular and graft outcomes.
• Both pre-transplant and early post-transplant HDL-C levels are important prognostic indicators in KTRs.
• Monitoring and potentially managing HDL-C levels may be vital for improving KTR outcomes.