Summary: Researchers report that brief daily meditation or music listening may change blood markers linked to cellular aging and Alzheimer’s disease, and these changes are associated with improvements in memory, cognition, sleep, mood, and quality of life in older adults with memory concerns.
Source: IOS Press.
A research team led by Dr. Kim Innes, professor at the West Virginia University School of Public Health, evaluated whether two simple, 12-week mind-body programs could influence blood biomarkers related to cellular aging and Alzheimer’s disease in older adults experiencing subjective cognitive decline (SCD). Their randomized clinical trial, published in the Journal of Alzheimer’s Disease, also examined how biomarker changes related to cognitive performance, sleep, mood, stress, and overall quality of life.
Subjective cognitive decline (SCD) describes people who notice worsening memory or thinking despite normal performance on standard tests. SCD can represent a preclinical phase of Alzheimer’s disease and is associated with higher risk of future cognitive impairment and dementia. Because this stage may provide an opportunity for early intervention, the study tested two low-cost, accessible practices—Kirtan Kriya meditation and passive music listening—as potential strategies to influence biological indicators linked to dementia risk.
Study design and participants:
Sixty older adults reporting SCD were enrolled in a randomized, controlled trial. Participants were randomly assigned to one of two home-based programs: a brief Kirtan Kriya meditation (KK) practice or a music-listening (ML) program. Both groups were instructed to practice for 12 minutes per day for 12 weeks. Blood samples and clinical assessments were collected at baseline and at three months, with clinical follow-up at six months (three months after the intervention ended).
Biomarkers and clinical measures:
Researchers measured two markers of cellular aging—telomere length (TL) and telomerase activity (TA)—in peripheral blood mononuclear cells, alongside plasma levels of amyloid-beta peptides (Aβ38, Aβ40, and Aβ42), which are commonly associated with Alzheimer’s pathology. In parallel, cognitive tests and validated questionnaires assessed memory, global cognition, perceived stress, sleep quality, mood, and quality of life at baseline, three months, and six months.
Key findings:
- After three months, the meditation group showed significantly larger increases in plasma Aβ40 compared with the music-listening group. Importantly, rising Aβ40 levels correlated with better memory and cognitive scores, as well as improvements in mood, sleep, and quality of life at both three and six months. These correlations were stronger in the meditation group.
- Telomerase activity increased in both groups, but significant rises were most evident among participants who began the study with lower telomerase activity (at or below the 50th percentile) and among those with higher adherence to the daily practice. Similarly, increases in telomere length were greater for participants who had shorter telomeres at baseline.
- Both interventions produced measurable improvements in cognitive performance, sleep quality, and psychological well-being. However, reductions in stress and improvements in mood and quality of life were consistently larger in the meditation group.
- Many of the biomarker changes (TL and TA) were associated with clinical gains on specific cognitive and psychosocial measures, supporting the possibility of functional links between biological effects and observable improvements in cognition and well-being.
Clinical implications and interpretation:
This exploratory trial suggests that brief, daily mind-body practices—particularly a structured meditation technique—may influence blood biomarkers linked to cellular aging and Alzheimer’s disease in older adults who report memory problems. The observed biomarker shifts were associated with meaningful improvements in memory, cognition, mood, sleep, and quality of life, and many benefits persisted or strengthened three months after the intervention ended. While findings are promising, these results are exploratory and warrant replication in larger samples with longer follow-up to determine whether such practices can reduce long-term risk of cognitive decline or dementia.
Source: IOS Press.
Publisher: Organized and reported by NeuroscienceNews.com.
Image source: NeuroscienceNews.com (public domain).
Original research: Innes KE, Selfe TK, Brundage K, Montgomery C, Wen S, Kandati S, Bowles H, Khalsa DS, Huysmans Z. Effects of Meditation and Music-Listening on Blood Biomarkers of Cellular Aging and Alzheimer’s Disease in Adults with Subjective Cognitive Decline: An Exploratory Randomized Clinical Trial. Journal of Alzheimer’s Disease. Published November 9, 2018. doi:10.3233/JAD-180164
Background: Telomere length (TL), telomerase activity (TA), and plasma amyloid-beta (Aβ) levels are emerging biomarkers associated with cognitive decline and dementia risk.
Objective: To evaluate the effects of two 12-week relaxation programs—Kirtan Kriya meditation and music listening—on TL, TA, and Aβ levels in adults with subjective cognitive decline, and to assess how biomarker changes relate to cognitive function, psychosocial status, and quality of life.
Methods: Participants practiced either Kirtan Kriya meditation or music listening for 12 minutes daily over 12 weeks. Plasma Aβ (38/40/42) and peripheral blood mononuclear cell TL and TA were measured at baseline and three months. Cognitive function, stress, sleep, mood, and quality of life were assessed at baseline, three months, and six months.
Results: The meditation group showed significantly greater increases in Aβ40 than the music group. Telomerase activity rose in both groups, particularly among participants with lower baseline TA and higher practice adherence. Increases in TL and TA were larger among participants with lower baseline values. Both groups experienced improvements in cognitive and psychosocial measures, with greater reductions in stress and improved mood and quality of life in the meditation group. Changes in Aβ, TL, and TA correlated with clinical improvements.
Conclusion: Simple, daily mind-body practices may influence plasma Aβ levels, telomere length, and telomerase activity. These biomarker changes were associated with improvements in cognition, sleep, mood, and quality of life, suggesting potential functional relationships that merit further study.