Related Experiment Videos
Inhibition of cerebral protein synthesis does not prolong short-term memory
Abstract:
Male Swiss albino CD-1 mice given a single subcutaneous injection of a cerebral protein synthesis inhibitor, anisomycin (ANI; 1 mg/animal), 20 min prior to a single trial of passive avoidance training demonstrated impaired retention at tests given 3 hr, 6 hr, 1 day, and 7 days after training. Retention was not significantly different from that of saline controls when tests were given .5 or 1.5 hr after training. Prolonging inhibition of brain protein synthesis by giving either one or two additional injections of ANI at 2 hr or at 2 and 4 hr after training did not prolong good retention performance. The temporal development of impaired retention in ANI-treated mice could not be accounted for by drug dosage, duration of protein synthesis inhibition, or nonspecific sickness at test. In contrast to the suggestion that protein synthesis inhibition prolongs short-term memory, the results of this experiment indicate that short-term memory is not prolonged by antibiotic drugs that inhibit cerebral protein synthesis. All evidence seems consistent with the hypothesis that short-term memory is independent of protein synthesis and that the establishment of long-term memory depends on protein synthesis during or shortly after training.
Insights
Inhibiting cerebral protein synthesis with anisomycin (ANI) impaired memory retention in mice. Short-term memory appears independent of protein synthesis, while long-term memory formation requires it.
Area of Science:
- Neuroscience
- Molecular Biology
- Cognitive Science
Background:
- Protein synthesis is crucial for memory consolidation.
- The role of protein synthesis in short-term memory remains debated.
Purpose of the Study:
- To investigate the effect of inhibiting cerebral protein synthesis on memory retention.
- To determine if short-term memory is dependent on protein synthesis.
Main Methods:
- Male Swiss albino CD-1 mice received anisomycin (ANI), a protein synthesis inhibitor.
- Passive avoidance training was administered, followed by memory retention tests at various time points.
- Additional ANI injections were given to prolong protein synthesis inhibition.
Main Results:
- Anisomycin administration 20 minutes before training impaired memory retention at 3 hours to 7 days post-training.
- Memory retention was not affected at 0.5 or 1.5 hours post-training.
- Prolonging anisomycin inhibition did not extend good retention performance.
Conclusions:
- Short-term memory is not prolonged by inhibiting cerebral protein synthesis.
- Long-term memory formation appears to depend on protein synthesis occurring during or shortly after training.