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Schizophrenia drug development may be 'de-risked' with new research tool

Date:
November 22, 2017
Source:
Columbia University Medical Center
Summary:
Biomarkers that can help with development of better treatments for schizophrenia have now been identified, report investigators.
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Researchers at Columbia University Medical Center (CUMC) and the New York State Psychiatric Institute (NYSPI) have identified biomarkers that can aid in the development of better treatments for schizophrenia.

The findings were published online in JAMA Psychiatry.

In the past two decades, the pharmaceutical industry has spent over $2.5 billion to develop new schizophrenia drugs. But while many appear to be effective in animal models, most fail when tested in late-stage human clinical trials.

"While a great deal of money has been invested in developing schizophrenia drugs, a similar investment hasn't been made to develop biomarkers that could improve the reliability and consistency of test results," said Daniel Javitt, MD, PhD, professor of psychiatry and Director of the Division of Experimental Therapeutics at CUMC, Director of schizophrenia research at the Nathan Kline Institute for Psychiatric Research, and Co-Principal Investigator of the study.

The National Institute of Mental Health's FAST Initiative, which was established to validate the use of biomarkers to facilitate drug development, aligns with the 21st Century Cures Act passed last year by Congress. The legislation authorized the U.S. Food and Drug Administration to approve treatments based on biomarker data alone, and created a formal Biomarker Qualification Program.

In this context, FAST-Psychosis researchers identified biomarkers using MRI applications to support the development of drugs that target the glutamate system. Previous studies have shown that drugs such as phencyclidine (PCP or "angel dust") and ketamine, which block glutamate receptors, cause schizophrenia-like symptoms in healthy volunteers.

The researchers evaluated three potential biomarkers for detecting the effects of ketamine on human brain function. The largest effects were observed with a biomarker measuring increases in blood flow in the frontal regions of the brain. This response was detected consistently among individuals who were briefly exposed to ketamine, and reliably distinguished them from those who had been given a placebo. Another measure of the concentration of glutamate/glutamine was also sensitive to ketamine brain effects.

Overall, the biomarkers were successful in identifying over 90 percent of individuals who had received ketamine, and differentiating them from all of those in the placebo group.

"These results enable us to determine whether potential treatments will be effective against patients' symptoms by testing them first in healthy volunteers and defining the best doses based on objective physiological data before conducting costly clinical trials," said Jeffrey Lieberman, MD, the Lawrence C. Kolb Professor and Chairman of the Department of Psychiatry at CUMC, and Principal Investigator of this study.

If the biomarkers are approved by the FDA, the developments of this study will be the first objective biomarkers registered to permit approval of new glutamate-modulating treatments for schizophrenia.


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Materials provided by Columbia University Medical Center. Note: Content may be edited for style and length.


Journal Reference:

  1. Daniel C. Javitt, Cameron S. Carter, John H. Krystal, Joshua T. Kantrowitz, Ragy R. Girgis, Lawrence S. Kegeles, John D. Ragland, Richard J. Maddock, Tyler A. Lesh, Costin Tanase, Philip R. Corlett, Douglas L. Rothman, Graeme Mason, Maolin Qiu, James Robinson, William Z. Potter, Marlene Carlson, Melanie M. Wall, Tse-Hwei Choo, Jack Grinband, Jeffrey A. Lieberman. Utility of Imaging-Based Biomarkers for Glutamate-Targeted Drug Development in Psychotic Disorders. JAMA Psychiatry, 2017; DOI: 10.1001/jamapsychiatry.2017.3572

Cite This Page:

Columbia University Medical Center. "Schizophrenia drug development may be 'de-risked' with new research tool." ScienceDaily. ScienceDaily, 22 November 2017. <www.sciencedaily.com/releases/2017/11/171122113008.htm>.
Columbia University Medical Center. (2017, November 22). Schizophrenia drug development may be 'de-risked' with new research tool. ScienceDaily. Retrieved October 5, 2024 from www.sciencedaily.com/releases/2017/11/171122113008.htm
Columbia University Medical Center. "Schizophrenia drug development may be 'de-risked' with new research tool." ScienceDaily. www.sciencedaily.com/releases/2017/11/171122113008.htm (accessed October 5, 2024).

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