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National Institutes of Health

Science Update
September 2, 2008

Gene Associated with Social Behavior in Animals Has Similar Effects in Human Males

Prairies voles (Microtus ochrogaster)
The well-studied bonding behaviors of prairie voles (pictured above), which often mate for life, may help inform research on human bonding (Photo Credit: Larry Young, Ph.D., Emory University)

man and woman holding hands
Variations in a gene may affect how men bond with their wives

A gene variant related to the hormone vasopressin appears to be associated with how human males bond with their partners or wives, according to an NIMH-funded study. In voles, a mouse-like animal, the comparable gene has been studied extensively and has long been linked to vole bonding behaviors.

This is the first study to suggest that the wealth of information on vole pair-bonding may also apply to humans and may help to inform research on human disorders related to impaired social interactions and communication, such as autism. The paper was published online on September 2, 2008, in the Proceedings of the National Academy of Sciences.

A series of studies on vole populations, begun at the NIMH Intramural Research Program in the mid-1980s by now NIMH director Thomas Insel, M.D, showed that, in male rodents, variations in a section of the gene avpr1a affect social bonding behaviors, such as choosing a mate and parenting. Recently, some research on AVPR1A* in humans suggest a possible link with autism and certain social behaviors, such as altruism, but no direct association with human pair-bonding had previously been shown.

Jenae Neiderhiser, Ph.D., of The Pennsylvania State University, and colleagues interviewed 2,186 adults taking part in the Twin and Offspring Study in Sweden (TOSS). The TOSS study collected detailed information from pairs of twins and their partners or spouses about their marital relationships, personality and mental health, and genetic data.

In humans, genetic information is stored on chromosomes, and each chromosome is made up of two parts called alleles. The researchers found that the “334” allele of a common AVPR1A variation seemed to have a negative association with men’s relationship with their spouses.

Allele 334 has also been shown to be associated with increased activity in the amygdala, a brain region involved in regulating emotions.

The researchers caution that their findings do not suggest this genetic variation can be used to predict an individual’s pair-bonding behavior. However, their study complements findings from similar animal research and suggests that the well-defined relationship between genes, the brain and pair-bonding behavior in voles may also be relevant for humans.


Walum H, Westberg L, Henningsson S, Neiderhiser JM, Reiss D, Igl W, Ganiban JM, Spotts EL, Pedersen NL, Eriksson E, Lichtenstein P. Genetic variation in the vasopressin receptor 1a gene (AVPR1A) associates with pair-bonding behavior in humans. Proc Natl Acad Sci USA. 2008 Sept 2 [Epub ahead of print].

*Researchers use lower-case letters to denote animal genes and upper-case letters for human genes.