The presence of severely abnormal behavior, such as self-injurious behavior (SIB) in laboratory housed primates compromises the quality of the animal research resource and adversely impacts research. In rhesus monkeys, SIB consists of intense, self-directed biting that can result in serious wounds requiring veterinary treatment. Based on findings from our laboratory and others, we have developed a model proposing that SIB arises from adverse life events, is maintained by dysregulation of several neurochemical and physiological systems, and functions to reduce anxiety. Unfortunately, SIB is resistant to treatment, alleviated neither by environmental enrichment nor changes in cage size. Pharmacological treatments have shown effectiveness in reducing SIB;however, relapse is common post-treatment, and long-term maintenance on drugs is undesirable for research purposes. The long-term goal of this project is to decrease the prevalence of SIB in captive primates by (1) preventing the onset of SIB through identification of key risk factors, and (2) developing novel treatments for this disorder that are cost-effective and produce long-lasting benefit. In furtherance of this goal, the proposed project will test the hypothesis that stress exposure and anxious behavior are precipitating factors in the development of SIB. To determine the generality of this hypothesis, factors contributing to SIB onset will be studied at 4 national primate research centers. To reduce the incidence of SIB in animals that have already developed this disorder, we will test a novel pharmacotherapeutic approach involving administration of the opioid receptor antagonist naltrexone. Short- term treatment with naltrexone has been shown to yield long-term decrements in SIB in many human patients, but this compound has not yet been tested on non-human primates. Finally, hair plucking (another type of SIB) and more generally hair loss have come under increased scrutiny from federal regulators. Consequently, we have enlarged the scope of this project to include hair loss, and we will test the hypothesis that hair loss in captive primates can result from several different factors, including hair plucking, stress and anxiety, and atopic dermatitis.

Public Health Relevance

This research is designed to improve the quality of the research resource. Rhesus monkeys are crucial in the development of models for many human diseases. The goal of this project is to determine the factors that contribute to the development of severely abnormal behavior in rhesus monkeys and to identify strategies for prevention and treatment.

National Institute of Health (NIH)
Office of The Director, National Institutes of Health (OD)
Resource-Related Research Projects (R24)
Project #
Application #
Study Section
National Center for Research Resources Initial Review Group (RIRG)
Program Officer
Watson, William T
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
Harvard University
Schools of Medicine
United States
Zip Code
Peterson, Emily J; Worlein, Julie M; Lee, Grace H et al. (2016) Rhesus macaques (Macaca mulatta) with self-injurious behavior show less behavioral anxiety during the human intruder test. Am J Primatol :
Lutz, Corrine K; Coleman, Kris; Worlein, Julie M et al. (2016) Factors influencing alopecia and hair cortisol in rhesus macaques (Macaca mulatta). J Med Primatol 45:180-8
Dettmer, Amanda M; Wooddell, Lauren J; Rosenberg, Kendra L et al. (2016) Associations between early life experience, chronic HPA axis activity, and adult social rank in rhesus monkeys. Soc Neurosci :1-10
Dettmer, Amanda M; Rosenberg, Kendra L; Suomi, Stephen J et al. (2015) Associations between Parity, Hair Hormone Profiles during Pregnancy and Lactation, and Infant Development in Rhesus Monkeys (Macaca mulatta). PLoS One 10:e0131692
Dettmer, A M; Novak, M A; Meyer, J S et al. (2014) Population density-dependent hair cortisol concentrations in rhesus monkeys (Macaca mulatta). Psychoneuroendocrinology 42:59-67
Novak, Melinda A; El-Mallah, Saif N; Menard, Mark T (2014) Use of the cross-translational model to study self-injurious behavior in human and nonhuman primates. ILAR J 55:274-83
Lutz, Corrine K; Williams, Priscilla C; Sharp, R Mark (2014) Abnormal behavior and associated risk factors in captive baboons (Papio hamadryas spp.). Am J Primatol 76:355-61
Kelly, Brian; Maguire-Herring, Vanessa; Rose, Christian M et al. (2014) Short-term testosterone manipulations do not affect cognition or motor function but differentially modulate emotions in young and older male rhesus monkeys. Horm Behav 66:731-42
Simpson, Elizabeth A; Sclafani, Valentina; Paukner, Annika et al. (2014) Inhaled oxytocin increases positive social behaviors in newborn macaques. Proc Natl Acad Sci U S A 111:6922-7
Meyer, Jerrold S; Hamel, Amanda F (2014) Models of stress in nonhuman primates and their relevance for human psychopathology and endocrine dysfunction. ILAR J 55:347-60

Showing the most recent 10 out of 25 publications