critique

# Critical Evaluation: TREM2 R47H Metabolic Lock-in at Cholesterol Ester Accumulation

## Executive Summary

This hypothesis proposes a mechanistic cascade linking the TREM2 R47H variant to microglial dysfunction via impaired ligand sensing, attenuated SYK signaling, and subsequent dysregulation of the ACAT1/LXR cholesterol esterification pathway. While the hypothesis is biologically plausible and integrates multiple lines of evidence, several critical weaknesses undermine its current confidence