Wie riskant ein Mensch mit Geld umgeht, ist offenbar auch eine Frage des Erbguts. In Experimenten mit Freiwilligen haben Forscher einen Zusammenhang zwischen dem Investitionsverhalten und Genen entdeckt, die den Haushalt von Botenstoffen im Gehirn beeinflussen.
Ist The global financial crisis may also be attributed to specific genetic variants with investors? This suggests a study published Camelia Kuhnen and have Joan Chiao of Northwestern University in Evanston now in the journal PLoS ONE. The researchers studied volunteers who should invest in a money game.
Declining rates: risk-programmed in the genome?
At the beginning of the experiment, participants received each $ 15. With a computer program, they met in 1996 in succession investment decisions. They have always had a choice between two options: a safe investment with low, but guaranteed return and a risky investment with a higher yield and Risk of loss. At the end of the experiment, participants were given the generated amount paid - on average $ 25.
Researchers collected saliva samples from each participant in addition, it isolated the DNA and looked for the genes of 5-HTTLPR and DRD4 lookout. 5-HTTLPR sets the blueprint for a protein that the neurotransmitter serotonin discharged by cell walls, DRD4 the blueprint of a receptor that responds to the neurotransmitter dopamine. Both genes are found in different versions that work differently effective.
When the researchers compared the genetic profile of the participants with their risk appetite in the investment game, there were striking correlations: People with a more efficient serotonin transporter their money invested 28 percent more often in risky assets. Similarly, people went to a particular DRD4 variant 25 percent more often the financial risk.
The researchers believe that it will succeed in the future more and more genetic causes of complex behavior patterns to identify - for example, drug addiction or gambling addiction. They emphasize the same time that experience and cultural background, have also played a big influence.
- hda/ddp-
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