Related Experiment Videos
Effect of aging on the peripheral blood lymphocyte count
Journal of Gerontology
|March 1, 1978
Summary
Absolute lymphocyte counts decrease significantly with age, particularly after 40, while granulocyte counts remain stable. This finding supports the concept of aging-related immune system decline in humans.
Area of Science:
- Immunology
- Gerontology
- Hematology
Background:
- Immune function undergoes significant changes throughout the human lifespan.
- Understanding age-related alterations in immune cell populations is crucial for health and disease management.
Purpose of the Study:
- To analyze age-dependent variations in absolute lymphocyte and granulocyte counts in peripheral blood.
- To investigate potential differences in these counts between inpatient and outpatient populations.
Main Methods:
- Analysis of peripheral blood counts from 1684 inpatient and 884 outpatient subjects.
- Statistical evaluation of absolute lymphocyte and granulocyte counts across different age groups.
Main Results:
- Absolute lymphocyte count shows a sharp decline in early life, stabilizes, and then accelerates its decline after age 40.
- Absolute granulocyte count remains constant throughout life.
- Inpatient children in the first decade exhibit higher absolute lymphocyte counts compared to outpatients.
Conclusions:
- The observed decline in absolute lymphocyte count with aging supports evidence of diminished cellular and humoral immunity in older adults.
- Peripheral blood cell counts provide insights into age-related immune system changes.