CBD protected mice from acute liver injury by preventing the breakdown of a key mitochondrial protein | Research

The takeaway

CBD attenuated acute liver injury in mice by inhibiting Parkin-mediated ubiquitination of MFN2, a mitochondrial fusion protein, thereby reducing inflammation, apoptosis, and oxidative stress.

Hepatology researchers, cannabinoid pharmacologists, liver disease clinicians

CBD's liver protection abolished by MFN2 knockdown and restored by overexpression

What the researchers found

CBD at 2.5 and 5 mg/kg mitigated LPS/D-GalN-induced liver damage, suppressed inflammatory cytokines, reduced hepatocyte death, and inhibited oxidative stress. The mechanism involved CBD preventing the degradation of mitofusin-2 (MFN2) by disrupting the interaction between Parkin and MFN2. When MFN2 was knocked down, CBD's protective effects were abolished; when MFN2 was overexpressed, protective effects were restored.

Why it matters

Acute liver injury can rapidly progress to liver failure with high mortality. This study identifies a specific molecular mechanism for CBD's hepatoprotective effects, which could inform development of liver injury treatments.

The numbers in context

CBD: 2.5 and 5 mg/kg in vivo, 2.5 and 5 micromolar in vitro; MFN2 protein levels increased by CBD; Parkin-MFN2 binding decreased; MFN2 ubiquitination inhibited; effects abolished by MFN2 knockdown and restored by overexpression

How the study worked

In vivo LPS/D-GalN-induced acute liver injury mouse model treated with CBD. RAW264.7 macrophage cells for in vitro validation. siRNA knockdown, plasmid overexpression, and adeno-associated virus delivery used to confirm MFN2 as the critical mediator. Multiple assays including H&E staining, TUNEL, TEM, Western blot, Co-IP, and more.

What this study cannot tell us

Animal model of chemically-induced liver injury may not reflect all forms of human liver disease. CBD doses and routes of administration may not translate directly. No human data. Mechanism found in one cell type (macrophages) may not apply universally.

How to read the evidence

Preliminary: well-designed animal study with thorough mechanistic validation, but no human data and chemically-induced injury model.

When this study was published

2026 preclinical publication on CBD and acute liver injury.

The bigger picture

This adds mechanistic depth to the growing literature on CBD's anti-inflammatory properties. Rather than just showing CBD reduces inflammation, it identifies the specific mitochondrial pathway (Parkin-MFN2) responsible, which could apply beyond liver injury.

Questions still open

Would CBD protect against drug-induced liver injury (e.g., acetaminophen) through the same pathway? At what human-equivalent doses would CBD provide hepatoprotection? Does long-term CBD use affect MFN2 dynamics differently?

Common questions

Can CBD protect the liver?

In this mouse study, CBD protected against acute liver injury by preserving a key mitochondrial protein (MFN2). This reduced inflammation, cell death, and oxidative stress. Human studies are needed to confirm.

How does CBD protect the liver according to this study?

CBD prevents the protein Parkin from degrading MFN2, a mitochondrial fusion protein essential for cell survival. When MFN2 is preserved, mitochondrial function is maintained and inflammatory responses are dampened.

Read the original research

Cannabidiol attenuates the LPS/D-Galactosamine-induced acute liver injury by inhibiting parkin-mediated ubiquitination of MFN2.

Journal of ethnopharmacology, 359, 121067

View on PubMed ↗Publisher’s paper ↗

Citation

Zhan, Zhikun; Jiang, Yaojie; Chen, Siyu; Yang, Qiyuan; Pan, Guanxing; Liu, Yiwei; Fang, Weipeng; Chen, Runzhi; Tang, Lan; Lin, Cuihong. (2026). Cannabidiol attenuates the LPS/D-Galactosamine-induced acute liver injury by inhibiting parkin-mediated ubiquitination of MFN2.. Journal of ethnopharmacology, 359, 121067. https://doi.org/10.1016/j.jep.2025.121067