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Laughter regulates gene expression in patients with type 2 diabetes
Takashi Hayashi1, Osamu Urayama, Koichi Kawai
1Foundation for Advancement of International Science, Bio-Laboratory, Tsukuba, Japan. hayashi@fais.or.jp
Psychotherapy and Psychosomatics
|December 20, 2005
Summary
Laughter, a positive emotion, alters gene expression in patients with type 2 diabetes. While not impacting blood glucose metabolism, laughter influenced immune response and cell cycle-related genes.
Area of Science:
- Psychoneuroimmunology
- Molecular Biology
- Genomics
Background:
- Positive emotions impact endocrine and immune systems.
- Laughter is a key expression of positive emotion.
- Gene expression changes associated with laughter were investigated.
Purpose of the Study:
- To examine the effect of laughter on gene expression.
- To identify specific genes affected by laughter in type 2 diabetes patients.
Main Methods:
- Microarray analysis of 18,716 genes.
- Peripheral blood leukocytes from type 2 diabetes patients were used.
- Gene expression changes were induced by listening to a comic story.
Main Results:
- Twenty-three genes showed significant expression changes post-laughter.
- Eight genes were upregulated, and 15 were downregulated.
- Upregulated genes were linked to cell cycle, apoptosis, and cell adhesion; downregulated genes were involved in immune response and signal transduction.
Conclusions:
- Laughter is linked to alterations in gene expression.
- The study did not find a direct link between laughter and blood glucose metabolism gene regulation.
- Further research is needed to clarify the relationship between laughter, gene expression, and physical condition.
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