Related Experiment Video
Updated: Jan 28, 2026
11:56
In Vitro Bioluminescence Assay to Characterize Circadian Rhythm in Mammary Epithelial Cells
Published on: September 28, 2017
10.4K
Association between circadian rhythms and neurodegenerative diseases
Yue Leng1, Erik S Musiek2, Kun Hu3
1Department of Psychiatry, Neurology, and Epidemiology and Biostatistics, University of California, San Francisco, CA, USA; San Francisco VA Medical Center, San Francisco, CA, USA.
The Lancet. Neurology
|February 21, 2019
Summary
Circadian rhythm disruptions are common in aging and worsen with neurodegenerative diseases like Alzheimer's and Parkinson's. These disruptions may also be a risk factor for these conditions.
Area of Science:
- Neuroscience
- Chronobiology
- Gerontology
Background:
- Circadian rhythm dysfunction is prevalent in aging adults.
- Disruptions are more severe in neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease.
- These disruptions can precede clinical neurodegeneration symptoms.
Purpose of the Study:
- To explore the relationship between circadian rhythm disruptions and neurodegenerative diseases.
- To understand the potential role of circadian disruptions as a risk factor for Alzheimer's and Parkinson's disease.
- To investigate the underlying mechanisms linking circadian rhythms and neurodegeneration.
Main Methods:
- Review of preliminary studies on circadian rhythm disruptions in aging and neurodegenerative diseases.
- Analysis of proposed mechanistic pathways, including protein homeostasis and immune function.
- Assessment of current clinical evidence and identification of research gaps.
Main Results:
- Circadian rhythm disruptions manifest differently based on neurodegenerative disease type and severity.
- Preliminary evidence suggests circadian disruptions may be a risk factor for Alzheimer's and Parkinson's disease.
- Mechanistic links may involve altered protein homeostasis, immune, and inflammatory functions.
Conclusions:
- Circadian rhythm disruptions are significant in aging and neurodegenerative diseases.
- Further large, longitudinal studies are needed to confirm circadian disruptions as a risk factor.
- More research into mechanisms and clinical trials for circadian interventions are required to prevent or delay neurodegeneration.
Related Concept Videos
02:19Circadian Rhythms and Gene Regulation
4.6K
The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
4.6K
01:15Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
363
Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
363
01:30Pulse rhythm
1.4K
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
1.4K
01:29Disturbances in Heart Rhythm
2.9K
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
2.9K
01:24ECG Interpretation of Rhythms
13.6K
An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
13.6K
01:21Association Areas of the Cortex
9.2K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
9.2K