Ethanol-Induced Depression: Exploring the Underlying Molecular Mechanisms

Ethanol consumption is widely recognized for its detrimental effects on mental health, particularly its association with depressive disorders. This narrative review aims to explore the intricate molecular mechanisms underlying ethanol-induced depression, synthesizing findings from preclinical and clinical studies. We begin by providing an overview of the relationship between chronic ethanol consumption and depression, highlighting compelling evidence from diverse populations. Subsequently, we delve into insights from animal models that elucidate the pathophysiological changes triggered by prolonged ethanol exposure. Key mechanisms identified include oxidative stress, which contributes to cellular damage; neuroinflammation, characterized by the activation of glial cells and altered cytokine profiles; and disruptions in neurotrophic factors that impair neuronal growth and survival. Furthermore, we discuss the induction of apoptosis in neural cells and the significant impact of ethanol on neurotransmitter receptor remodeling and regulation, leading to altered synaptic transmission. While substantial progress has been made in understanding these mechanisms, we also acknowledge the limitations of current research methodologies and call for further investigations to translate these findings into effective therapeutic strategies for individuals affected by ethanol-induced depression. This review ultimately underscores the need for a comprehensive understanding of the molecular underpinnings of ethanol's impact on mood disorders, paving the way for improved interventions and preventative measures.