GPRC5D and sarcopenia: The expression levels of GPRC5D-AS1 and SLC7A11 in the skeletal muscle tissues of sarcopenia patients were evaluated, with GPRC5D-AS1 assessed at the transcriptional level by qRT-PCR and SLC7A11 analyzed using both qRT-PCR and WB to examine its expression at transcriptional and translational levels, respectively.