Related Experiment Videos
[Immune activation and depression in the elderly]
D W Maas1, R G J Westendorp, R C van der Mast
1Leids Universitair Medisch Centrum, afd. Psychiatrie, B1-P, Postbus 9600, 2300 RC Leiden. d.w.maas@lumc.nl
Nederlands Tijdschrift Voor Geneeskunde
|July 16, 2008
Summary
The inflammatory hypothesis suggests that inflammation may cause late-life depression. Evidence shows cytokines, linked to immune responses, can induce depressive symptoms, especially in older adults.
Area of Science:
- Neuroscience and Immunology
- Geriatric Psychiatry
Context:
- Late-life depression is a significant clinical challenge.
- Existing etiological hypotheses include monoamine, stress, and vascular factors.
- The role of inflammation in depression is increasingly recognized.
Purpose:
- To explore the inflammatory hypothesis as a potential cause of late-life depression.
- To review evidence linking immune system activation and depressive symptoms.
Summary:
- Cytokine administration in animals and humans induces sickness behavior and depressive symptoms.
- Elevated depression rates in autoimmune diseases and positive effects of anti-cytokine therapy (etanercept) support this link.
- Cytokines influence the hypothalamus-pituitary-adrenal axis and neurotransmitter systems implicated in depression.
- Aging-related immune dysregulation may heighten susceptibility to inflammation-driven depression in older adults.
Impact:
- Highlights inflammation as a key factor in understanding late-life depression.
- Suggests potential novel therapeutic targets for geriatric depression.
- Emphasizes the interplay between immune function and mental health in aging.
Related Concept Videos
01:15Drug Dosing: Geriatric Patients
Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
01:27Pharmacodynamics in Geriatric Patients: Effects of Age
Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
01:19Psychoneuroimmunology: Diabetes and Cancer
Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...
01:26Aging
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
01:18Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism
Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
01:27Psychoneuroimmunology: Cardiovascular Disease
Psychoneuroimmunology (PNI) is a multidisciplinary field that examines how psychological factors, particularly stress, interact with the immune system and impact physical health. Research in PNI has shown that chronic or traumatic stress can disrupt both the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system. These disruptions contribute to serious health conditions, including cardiovascular diseases.
A key area of focus in PNI is the relationship between stress and coronary...
A key area of focus in PNI is the relationship between stress and coronary...