Cardiovascular

Metabolic Syndrome and Cardiovascular Outcomes in Pediatric Kidney Transplant Recipients-A Cross-Sectional Study.

TL;DR

Metabolic syndrome was found in about a third of pediatric kidney transplant recipients, with post-transplant weight gain (ΔBMI height-age Z-score) identified as a key independent determinant, while acute rejection was the independent predictor of left ventricular hypertrophy.

Key Findings

Metabolic syndrome was present in 28.1% of pediatric kidney transplant recipients at a median of 21.5 months post-transplant.

  • 9 out of 32 recipients met criteria for metabolic syndrome
  • Cohort median age was 14.0 years (IQR 12.0, 15.9); 71% male
  • Median follow-up post-transplant was 21.5 months (IQR 17, 37.5)
  • Diagnosis of MS was made using recommendations from the Pediatric Renal Nutrition Task Force
  • Study was conducted at a single center in India

Hypertriglyceridemia was the most common individual component of metabolic syndrome, present in over half the cohort.

  • Hypertriglyceridemia was present in 17 children (53.1%)
  • Low HDL cholesterol was found in 10 children (31.2%)
  • Hypertension was present in 22 children (68.8%)
  • Fasting hyperglycemia was present in 7 children (21.9%)

Post-transplant weight gain, measured as ΔBMI height-age Z-score, was significantly higher in the metabolic syndrome group and was an independent predictor of MS.

  • The ΔBMI height-age Z-score was significantly higher in the MS group compared to the non-MS group (p = 0.003)
  • In multivariate regression analysis, ΔBMI height-age Z-score was identified as an independent predictor of MS
  • Post-transplant weight gain was described as 'a key determinant of MS'

Acute rejection, not metabolic syndrome, was the independent predictor of left ventricular hypertrophy (LVH) in multivariate regression analysis.

  • Acute rejection was identified as an independent predictor of LVH in multivariate regression analysis
  • MS was not an independent predictor of LVH
  • There was no statistically significant difference in left ventricular mass index (LVMI) between the MS and non-MS groups
  • Cardiovascular outcomes assessed included hypertension, LVH, and carotid intima medial thickness (cIMT)

All patients in the cohort had elevated carotid intima medial thickness (cIMT), indicating universal subclinical atherosclerotic burden.

  • 100% of the 32 pediatric kidney transplant recipients had elevated cIMT
  • cIMT was one of three cardiovascular outcomes assessed alongside hypertension and LVH
  • No difference in cIMT between MS and non-MS groups was specifically reported as a distinguishing finding

Graft function (eGFR), triglyceride index, and hand grip strength did not differ significantly between the MS and non-MS groups.

  • There was no statistically significant difference in eGFR between MS and non-MS groups
  • Triglyceride index was similar between groups
  • Hand grip strength (HGS), used to evaluate muscle strength, did not differ between groups
  • Muscle strength was evaluated by measuring hand grip strength

What This Means

This research examined how common metabolic syndrome (a cluster of conditions including high blood pressure, high blood sugar, abnormal cholesterol, and excess body fat) is in children who have received a kidney transplant, and what effect it has on heart health. Studying 32 pediatric kidney transplant recipients in India at a median of about 21 months after transplant, the researchers found that roughly 1 in 3 children had developed metabolic syndrome. High blood pressure was extremely common (nearly 69% of children), as was high triglycerides (53%), and all children showed thickening of the carotid artery wall — a sign of early cardiovascular disease risk. The study found that weight gain after transplant was the strongest driver of metabolic syndrome development, while a history of acute (sudden) rejection of the transplanted kidney was the key predictor of an enlarged heart muscle (left ventricular hypertrophy). Importantly, metabolic syndrome itself was not independently linked to heart enlargement when other factors were accounted for. Kidney graft function and muscle strength were similar whether or not a child had metabolic syndrome. This research suggests that monitoring and managing weight gain in children after kidney transplantation may be critical for reducing the risk of metabolic syndrome, and that preventing acute rejection episodes may help protect heart structure. The universal finding of thickened carotid arteries in all patients highlights that cardiovascular risk monitoring should be a routine part of care for all pediatric kidney transplant recipients, regardless of metabolic syndrome status.

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Citation

Saha A, Champaneri B, Patel V, Shah H, Kapadia S, Vala K, et al.. (2026). Metabolic Syndrome and Cardiovascular Outcomes in Pediatric Kidney Transplant Recipients-A Cross-Sectional Study.. Pediatric transplantation. https://doi.org/10.1111/petr.70438