MINI REVIEW article
Front. Cell. Infect. Microbiol.
Sec. Virus and Host
Volume 15 - 2025 | doi: 10.3389/fcimb.2025.1677212
Human Endogenous Retroviruses in Schizophrenia: Clinical Evidence, Molecular Mechanisms, and Implications
Provisionally accepted
- First People's Hospital of Kunshan, Kunshan, China
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Human endogenous retroviruses (HERVs), comprising 8% of the human genome, are implicated in schizophrenia, a complex psychiatric disorder driven by genetic, epigenetic, and environmental factors. This review examines the role of HERVs in schizophrenia pathogenesis. We synthesized clinical evidence, molecular mechanisms, and gene-environment interactions from studies on HERVs expression in schizophrenia, focusing on HERV-W and HERV-K in peripheral blood, cerebrospinal fluid, and brain tissues. Elevated HERV-W and HERV-K env and gag transcripts are consistently observed in individuals with schizophrenia, indicating potential diagnostic biomarkers. HERVs contribute to neuroinflammation, neurotoxicity, and epigenetic dysregulation of risk genes. The HERV-W env activates the Toll-like receptor 4(TLR4)/MyD88 pathway, disrupting glutamatergic and dopaminergic signaling, leading to synaptic dysfunction and neuronal apoptosis. Environmental triggers, such as viral infections and early-life stress, activate HERVs, linking genetic and environmental risks. Variability in HERV expression across disease stages highlights the need for standardized assays and longitudinal studies. Emerging technologies and preclinical models targeting HERV-W env offer promise for developing novel diagnostics and therapies. HERVs serve as pivotal mediators of schizophrenia's etiology, advancing precision psychiatry through biomarker and therapeutic innovation.
Keywords: human endogenous retroviruses, Schizophrenia, Neuroinflammation, gene‒environment interactions, synaptic dysfunction, precision psychiatry
Received: 31 Jul 2025; Accepted: 29 Sep 2025.
Copyright: © 2025 Zhang, Wang, Liu, Bao, Gao and Mao. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Mengyu Zhang, myzujs@163.com
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