Abstract
Rationale
Neuropeptide Y (NPY) and brain-derived neurotrophic factor (BDNF) have been implicated in both the stress response and alcohol addiction. However, few studies have assessed the NPY and BDNF response to stress in alcohol-dependent participants and the concurrent measure of NPY and BDNF has not been reported in human participants.
Objective
The purpose of this study was to concurrently assess serum NPY and BDNF, as well as adrenocorticotropin (ACTH) and cortisol, in control and race- and aged-matched abstinent alcohol-dependent participants in response to a stress-inducing public-speaking task.
Methods
Basal and post-stress serum values of NPY and BDNF, as well as ACTH and cortisol, were assessed in 14 abstinent alcohol-dependent and ten healthy control male participants.
Results
Basal measures were stable over short periods of time and stress induced a significant increase in both NPY (p = 0.002) and BDNF (p = 0.006) as well as ACTH (p < 0.001) and cortisol (p < 0.007). Alcohol-dependent and control groups did not significantly differ on any basal or stress-induced measure. Basal and delta responses of NPY and BDNF were not significantly correlated, and delta peak responses of NPY and BDNF did not correlate with one another or with their respective ACTH and cortisol responses.
Conclusions
These findings reveal that both serum NPY and BDNF are responsive to behavioral stressors, although their regulatory mechanisms appear to differ from one another and those of the hypothalamic–pituitary–adrenal axis. Differences in basal and stress-induced responses of NPY and BDNF were not supported between control and abstinent alcohol-dependent subjects.
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Acknowledgments
The authors thank Homeward Bound, Inc. and the Dallas VA Substance Abuse Team for their assistance in the recruitment and clinical care of patients and the UT Southwestern CTRC staff for their excellent patient care and meticulous attention to research protocol.
Role of funding source
Funding for this study was provided by NIH INIAStress U01AA13515, Department of Veterans Affairs, and NIH CTSA grant UL1 RR024982. None of the funding sources had a role in study design; in the collection, analysis, and interpretation of data; or in the writing of the report.
Conflict of interest
CN discloses employment by VA North Texas Health Care System, Dallas, TX, USA. Points of view in this document are those of the author(s) and do not necessarily represent the official position of NIMH, the Department of Veterans Affairs, or the US Government. Dr. North also discloses research support from NIAAA, NIMH, NIDDK, the American Orthopedic Association, the American Psychiatric Association, the Department of Veterans Affairs, and UT Southwestern Medical Center; consulting fees from the University of Oklahoma Health Sciences Center, Cubic, Inc., and the National Center for PTSD (Research Education in Disaster Mental Health); and honoraria from Washington University in St. Louis, the University of Alabama at Tuscaloosa, the Assisi Foundation of Memphis, and Magellan Health Services. BA received grant support from NIAAA, NIDA, and the Department of Veterans Affairs; consulted for Teva Pharmaceutical Industries Ltd., Shook, Hardy and Bacon LLP (medical malpractice for tobacco companies), and Paul J. Passante, P.C. (medical malpractice), and received honoraria from the Medical University of South Carolina, American Institute of Biological Sciences, American Academy of Addiction Psychiatry, Methodist Medical Center (Dallas, TX), Vanderbilt University, John Peter Smith Hospital, University of North Texas Health Science Center; American Academy of Addiction Psychiatry, University of New Mexico. YM, TW, UR, HX, and MJ declare that they have no conflicts of interest.
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Meng, D., Wu, T., Rao, U. et al. Serum NPY and BNDF response to a behavioral stressor in alcohol-dependent and healthy control participants. Psychopharmacology 218, 59–67 (2011). https://doi.org/10.1007/s00213-011-2414-1
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DOI: https://doi.org/10.1007/s00213-011-2414-1