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Forget me not: The effect of doxycycline on human declarative memory
Jelena M Wehrli1, Yanfang Xia1, Laura Meister1
1Department of Adult Psychiatry and Psychotherapy, University Hospital of Psychiatry Zurich, University of Zurich, Lenggstrasse 31, Zurich 8032, Switzerland.
Summary
Doxycycline, a tetracycline antibiotic, did not impair declarative memory in healthy adults. Instead, it improved declarative learning and memory consolidation, offering potential for neuroprotection research.
Area of Science:
- Neuroscience
- Pharmacology
- Cognitive Psychology
Background:
- Neuroprotective drugs are crucial for treating neurodegenerative and psychiatric disorders.
- Tetracyclines, including doxycycline, are being investigated for neuroprotective properties.
- Previous research suggested doxycycline might impair memory, prompting further investigation.
Purpose of the Study:
- To investigate the effects of doxycycline on declarative memory consolidation in healthy humans.
- To assess the specificity of doxycycline's effects on other cognitive domains like motor memory, attention, and processing speed.
Main Methods:
- Three independent randomized placebo-controlled double-blind trials (RCTs) were conducted.
- A total of 252 healthy young volunteers received either 200 mg doxycycline or a placebo.
- A neuropsychological test battery assessed declarative memory, motor memory, sustained attention, and processing speed.
Main Results:
- Doxycycline did not impair declarative memory; instead, it improved declarative learning and memory consolidation.
- Doxycycline slightly reduced motor learning but strengthened long-term motor memory.
- No long-term negative effects were observed on other cognitive domains.
Conclusions:
- Doxycycline shows potential for improving declarative learning and memory in healthy individuals.
- The findings suggest doxycycline may be a candidate for neuroprotective treatments.
- Further research is warranted to explore doxycycline's therapeutic applications.
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