The PCSK9 Protein Is Not Necessarily a Risk Factor for Major Depressive Disorder.

Introduction: Major depressive disorder (MDD) is one of the common psychiatric disorders that is characterized by abnormal neurobiological responses. Proprotein convertase subtilisin/kexin 9 (PCSK9) is important in cholesterol homeostasis.

Methods: This study aimed to investigate PCSK9 levels and oxidative stress with MDD disease.