Uremic Sarcopenia: the Role of Intramuscular Adipose Tissue As a Potential Early Identifier

Overview

Journal Front Med (Lausanne)

Specialty General Medicine

Date 2024 Nov 18

PMID 39554503

Authors

Annalisa Noce

Maria Jose Ceravolo

Paola Gualtieri

Giulia Marrone

Lorenzo Romano

Amir Shoshi

Manuela Di Lauro

Antonino De Lorenzo

Affiliations

Soon will be listed here.

Abstract

Introduction: Sarcopenia is a chronic pathological condition, first defined in 2010 and revised in 2018. The most recent definition of sarcopenia focuses mostly on "low muscle strength." A secondary form of sarcopenia is represented by uremic sarcopenia (US), a condition that characterizes end-stage kidney disease (ESKD) patients. The intramuscular adipose tissue (IMAT) seems to impact negatively on muscle strength, as it would seem to replace muscle fibers with a non-contractile component. The study aims to compare body composition parameters-both standardized and innovative-related to the diagnosis of US in hemodialysis (HD) patients, stratified by sarcopenia diagnosis. Furthermore, the different indices of sarcopenia are compared in order to evaluate their predictive capacity.

Methods: We analyzed 48 ESKD patients according to the sarcopenia diagnosis, obtained using dual-energy X-ray absorptiometry (DXA). Moreover, we assessed the presence of IMAT and calculated the sarcopenia index (SI).

Results: For the study, the enrolled population was divided according to the sarcopenia diagnosis: no sarcopenic patients had higher transferrin ( = 0.03), total proteins ( = 0.04), and azotemia pre-dialysis ( = 0.05) values. On the contrary, atherogenic indices were lower in no sarcopenic patients. Moreover, we observed an indirect correlation between the SI and parathyroid hormone (PTH) ( = 0.00138, = 0.54). Finally, we calculated the prevalence of sarcopenia and sarcopenia adjusted for IMAT. We showed a different prevalence between sarcopenia diagnosed with a standard index and an index adjusted for IMAT ( = 0.043). In conclusion, we believe that the most important result obtained is the indirect correlation between SI and PTH. These data corroborate the theories, in which PTH seems to play a central role in the cachexia genesis. Moreover, the SI adjusted for IMAT seems to be a more reliable parameter for the early identification of subjects at risk of developing US, allowing timely implementation of targeted therapeutic strategies.

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