A group of associate professor Takami Tomiyama of the Graduate School of Medicine, Osaka City University, in collaboration with Kanazawa University, University of Toyama, and Northwestern University in the United States, found that the existing drug, rifampicin, has a broad effect on preventing dementia. Announced that it was the first in the world to find out.

 Dementia includes Alzheimer's disease, frontotemporal dementia, and Lewy body dementia, and the causative proteins are amyloid β (Aβ), tau, and α-synuclein, respectively.These proteins form small aggregates (oligomers) consisting of several molecules to tens of minutes in the brain, and it is said that dementia develops due to dysfunction of nerve cells. Although there are many developments of therapeutic agents that remove Aβ, their effectiveness has not been confirmed.Since many nerve cells die after the onset, prevention before the onset has recently been emphasized.

 Rifampicin is an antibiotic that has been used for many years to treat tuberculosis and leprosy, and it has been reported that leprosy patients who were taking the drug have less dementia. In 1994, Associate Professor Tomiyama confirmed the existence of the inhibitory effect of the drug on Aβ aggregation.

 This time, we investigated the action of rifampicin in vitro and discovered that it has the action of suppressing the formation of oligomers of Aβ, tau, and α-synuclein.Furthermore, in order to investigate the effect of oral administration of the drug, it was orally administered to model mice with Alzheimer's disease and frontotemporal dementia for XNUMX month.As a result, in each case, the number of oligomers in the brain decreased, synapses were restored, and improvement of memory impairment was confirmed.

 It is said that it takes more than 20 years from the aggregation of Aβ in the brain to the onset of dementia, and it is thought that taking preventive drugs will take a long time.Rifampicin is cheap and can be taken internally, and information on side effects is accumulated.In the future, if the preventive effect on humans is confirmed in clinical trials and the problem of side effects can be cleared, it is said to be promising as a safe and effective dementia preventive drug.

Kanazawa University

Flexible and flexible learning of specialized knowledge in a wide range of fields.Fostering human resources who will lead the global society

Kanazawa University, which boasts a history and tradition of more than 150 years, has a basic philosophy of "a research university that emphasizes education that is open to the region and the world," and is rich in humanity with specialized knowledge, problem-seeking ability, international sense, and ethical standards. By fostering talented human resources, we aim to become a "Kanazawa University that lives globally" and a "knowledge base in East Asia" [...]

Toyama University

Practicing interesting lessons and interesting research that will open up the future

The University of Toyama is working to create an "interesting university" that offers encounters that will open up the future.We carry out lessons where you can receive highly specialized knowledge in an easy-to-understand, fun, and exciting way, and research that is unique or innovative and highly evaluated by society.Currently, human company art […]

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