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Monash Pharmacy studies dimmer switch drug idea to tackle schizophrenia
18 September 2014
Discovery of a new mechanism of drug action could lead to the next generation of drugs to treat schizophrenia.
Affecting one per cent of the world’s population, schizophrenia is a major health condition. It affects a person’s ability to think, feel and act and is associated with distressing symptoms including hallucinations and delusions.
New Monash University findings, published in the journal, Nature Chemical Biology, offer hope of a new class of drug that can act as a “dimmer switch” to control schizophrenia, without causing some of the common side effects associated with current anti-psychotic medicines.
One of the lead researchers of the study, Dr Rob Lane from the Monash Institute of Pharmaceutical Sciences said all current anti-psychotic medicines block the action of dopamine, a neurotransmitter, at a brain protein called the dopamine D2 receptor, resulting in serious side effects.
“These medications frequently result in serious side effects because this protein is also important for the control of movement. The side-effects can sometimes persist even after the patient has stopped taking the medication,” Dr Lane said.
Co-lead researcher Professor Arthur Christopoulos, said gaining a better understanding of the biology of schizophrenia will lead to more effective drugs.
“The idea behind our research is to develop a drug that doesn’t completely block dopamine. We found a molecule that, rather than blocking the effect of dopamine at the D2 receptor, acts to subtly dial down dopamine’s effect, a bit like a dimmer switch,” Professor Christopoulos said.
“This means that if we can get just the right amount of dial-down, we could treat the symptoms of the disease and avoid some of these side-effects.
“We’re a long way yet from developing a drug, but our dimmer switch approach to controlling schizophrenia means it’s conceivable we could have a whole new class of anti-psychotics in the future.”
The research team also found a unique twist with the molecule, its mechanism of action changed depending on the arrangement of the D2 receptor in the brain.
Dr Lane said not only does this represent a new approach to develop anti-psychotics, it gives researchers more information about the protein involved in the disease.
“This extra information will help researchers develop new drugs that target the protein,” Dr Lane said.
The next phase of the research will see Dr Lane and Professor Christopoulos collaborate with chemists at the Monash Institute of Pharmaceutical Sciences to try to develop a better version of the drug used in the study.
About Monash University’s Bachelor of Pharmacy
Monash University’s Bachelor of Pharmacy program produces graduates with a sound knowledge and understanding of the science, technology and practice behind pharmacy as a profession. It comprises four major areas of study: medicinal chemistry (the chemistry of drugs); pharmacology (the action of drugs); pharmaceutics (the presentation and delivery of drugs); and pharmacy practice (the application of all these to the professional practice of pharmacy). Program:Bachelor of Pharmacy (BPharm) Location: Melbourne, Victoria Semester intake: February 2015 Duration: 4 years Application deadline: While there is no set application deadline, applicants are strongly encouraged by to submit their applications before the end of September for the February intake.
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