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Chance discovery may find antibiotics alleviate symptoms of schizophrenia
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[Image: Pg-10-schizophrenia.jpg]

The brain of a person shortly after diagnosis with schizophrenia (top) showing it relatively unscathed. Five years later, there is substantial loss of grey matter (above). Damage starts in the outer regions of the brain and spreads to all parts over the years. Patients with the worst tissue loss tend to have the worst symp
A cheap antibiotic normally prescribed to teenagers for acne is to be tested as a treatment to alleviate the symptoms of psychosis in patients with schizophrenia, in a trial that could advance scientific understanding of the causes of mental illness.

The National Institute for Health Research is funding a £1.9m trial of minocycline, which will begin recruiting patients in the UK next month. The research follows case reports from Japan in which the drug was prescribed to patients with schizophrenia who had infections and led to dramatic improvements in their psychotic symptoms.
The chance observation caused researchers to test the drug in patients with schizophrenia around the world. Trials in Israel, Pakistan and Brazil have shown significant improvement in patients treated with the drug.
Scientists believe that schizophrenia and other mental illnesses including depression and Alzheimer's disease may result from inflammatory processes in the brain. Minocycline has anti-inflammatory and neuroprotective effects which they believe could account for the positive findings.
Details of the trial were presented to the independent Schizophrenia Commission by Bill Deakin, professor of psychiatry at the University of Manchester, who is the lead investigator. The 12-member commission, set up by the mental health charity Rethink, is looking into the treatment and care of people with schizophrenia, and is due to report in the summer.
The first account of minocycline's effects appeared in 2007 when a 23-year-old Japanese man was admitted to hospital suffering from persecutory delusions and paranoid ideas. He had no previous psychiatric history but became agitated and suffered auditory hallucinations, anxiety and insomnia.
Blood tests and brain scans showed no abnormality and he was started on the powerful anti-psychotic drug halperidol. The treatment had no effect and he was still suffering from psychotic symptoms a week later when he developed severe pneumonia.
He was prescribed minocycline to treat the pneumonia and within two weeks the infection was cleared and the psychosis resolved. Minocycline was stopped and his psychiatric symptoms worsened. Treatment with the drug was resumed and within three days he was better again. Halperidol was reduced but he remained on minocycline. Two years after his psychotic episode, he was still well.
The UK trial aims to recruit 175 patients recently diagnosed with schizophrenia, half of whom will be randomly allocated to take minocycline with their standard anti-psychotic treatment while the remainder take a placebo.
Brain scans will be carried out at the start and end of the 12 month trial to compare loss of grey matter an effect of schizophrenia in the two groups. Tests will also measure inflammatory markers in the blood.
Professor Sir Robin Murray, chair of the Schizophrenia Commission said: "Infection or inflammation might be involved in a minority of people with acute psychosis and minocycline might counter this. In depression inflammatory markers go up and in Alzheimer's too."
http://www.independent.co.uk/news/scienc...69121.html


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