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Combined Effects of Chronic Obstructive Pulmonary Disease and Depression on Spatial Memory in Old Rats
Cui Cai1, Chang Qing Xu2, Hua Liang Jin3
1Department of Geriatrics, Hangzhou Red Cross Hospital, Hangzhou 310003, China.
Chronic obstructive pulmonary disease (COPD) combined with depression impairs spatial memory in aged rats. This comorbidity may stem from oxidative stress and free radical imbalance, suggesting therapeutic targets for elderly patients.
Area of Science:
- Gerontology
- Neuroscience
- Pulmonology
Background:
- Comorbidity of chronic obstructive pulmonary disease (COPD) and depression is prevalent in geriatric patients.
- Understanding the impact of this comorbidity on cognitive function, specifically spatial memory, is crucial for effective geriatric care.
Purpose of the Study:
- To investigate the combined effects of COPD and depression on spatial memory in aged rats.
- To explore potential underlying mechanisms involving oxidative stress and free radical metabolism.
Main Methods:
- Aged Sprague-Dawley rats were modeled for COPD (smoking) and depression (chronic unpredictable mild stress).
- Spatial memory was assessed using the Morris water maze (MWM) test.
- Biochemical markers including superoxide dismutase (SOD) and malondialdehyde (MDA) were measured in serum and hippocampus.
Main Results:
- Successful establishment of comorbid COPD and depression models in aged rats was confirmed.
- Rats with both COPD and depression exhibited significantly impaired spatial memory, evidenced by longer latency and travel distance in the MWM test.
- Decreased SOD activity and increased MDA content were observed in the serum and hippocampus of the comorbid group, indicating oxidative stress.
Conclusions:
- COPD in comorbidity with depression induces spatial memory deficits in aged rats.
- The underlying mechanisms may involve overloaded free radical metabolism and oxidative stress.
- These findings suggest potential therapeutic targets for managing comorbid COPD and depression in geriatric populations.
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