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Potential new treatment for preventing post traumatic stress disorder

Discovery of biomarker unique to people with PTSD a world first

January 13, 2020
Centre for Addiction and Mental Health
Scientists have discovered the first biomarker unique to PTSD patients and they have created a peptide shown in a preclinical trial to treat and even prevent PTSD.

Research led by the Centre for Addiction and Mental Health (CAMH) published in the Journal of Clinical Investigation points to a groundbreaking discovery about a new potential treatment and prevention for post-traumatic stress disorder (PTSD).

The research team, led by Dr. Fang Liu, Senior Scientist and Head of Molecular Neuroscience in CAMH's Campbell Family Mental Health Research Institute, and Professor and Co-director of Division of Neuroscience and Clinical Translation, Department of Psychiatry at the University of Toronto, recently identified a protein complex that is elevated in PTSD patients. The researchers also developed a peptide to target and disrupt the protein complex. They found that the peptide prevented recall or encoding of fear memories in early tests. This suggests that the peptide could treat PTSD symptoms or prevent them entirely.

"The discovery of the Glucocorticoid Receptor-FKBP51 protein complex provides a new understanding of molecular mechanisms underlying PTSD," said Dr. Liu. "We believe this protein complex normally increases after severe stress, but in most cases, levels soon go back to baseline levels. However, in those who develop PTSD, the protein complex remains persistently elevated, and so this could be a blood-based biomarker for PTSD as well as being a target for pharmacological treatment. In addition, the peptide we developed could be given after a traumatic event, and could possibly prevent the patient from developing PTSD. This is a completely new approach to PTSD and for psychiatric disorders in general."

PTSD occurs in some people after experiencing or witnessing traumatic events, such as sexual assault or military combat. Patients can suffer from debilitating flashbacks, nightmares and anxiety which can severely impact quality of life. There are currently no laboratory diagnostic tests for PTSD, and existing treatments have limited efficacy. According to a recent study published in the British Journal of Psychiatry, Canada has the highest prevalence of PTSD among 24 examined countries, and 9.2 per cent of Canadians will develop PTSD in their lifetimes.

"We are thrilled this CAMH-led discovery can potentially help millions of people put trauma behind them," added Dr. Liu.

The study has been supported by CIHR and the CAMH Discovery Fund. CAMH has filed a patent for the peptide and diagnostic aspect of Dr. Liu's invention. Dr. Liu and her team will conduct further testing and refining of the peptide before conducting human clinical trials.

Story Source:

Materials provided by Centre for Addiction and Mental Health. Note: Content may be edited for style and length.

Journal Reference:

  1. Haiyin Li, Ping Su, Terence K.Y. Lai, Anlong Jiang, Jing Liu, Dongxu Zhai, Charlie T.G. Campbell, Frankie H.F. Lee, WeiDong Yong, Suvercha Pasricha, Shupeng Li, Albert H.C. Wong, Kerry J. Ressler, Fang Liu. The glucocorticoid receptor–FKBP51 complex contributes to fear conditioning and posttraumatic stress disorder. Journal of Clinical Investigation, 2020; DOI: 10.1172/JCI130363

Cite This Page:

Centre for Addiction and Mental Health. "Potential new treatment for preventing post traumatic stress disorder." ScienceDaily. ScienceDaily, 13 January 2020. <>.
Centre for Addiction and Mental Health. (2020, January 13). Potential new treatment for preventing post traumatic stress disorder. ScienceDaily. Retrieved May 19, 2024 from
Centre for Addiction and Mental Health. "Potential new treatment for preventing post traumatic stress disorder." ScienceDaily. (accessed May 19, 2024).

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