Adriaan W Bruijnzeel1,2,3, Parker Knight4, Stefany Panunzio4, Song Xue4, Matthew M Bruner4, Shannon C Wall4, Marjory Pompilus4, Marcelo Febo4,5,6, Barry Setlow4,5,6. 1. Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA. awbruijn@ufl.edu. 2. Department of Neuroscience, University of Florida, Gainesville, FL, USA. awbruijn@ufl.edu. 3. Center for Addiction Research and Education, University of Florida, Gainesville, FL, USA. awbruijn@ufl.edu. 4. Department of Psychiatry, University of Florida, 1149 Newell Dr., Gainesville, FL, 32611, USA. 5. Department of Neuroscience, University of Florida, Gainesville, FL, USA. 6. Center for Addiction Research and Education, University of Florida, Gainesville, FL, USA.
Abstract
RATIONALE: Cannabis use is common among adolescents and some research suggests that adolescent cannabis use increases the risk for depression, anxiety, and cognitive impairments in adulthood. In human studies, however, confounds may affect the association between cannabis use and the development of brain disorders. OBJECTIVES: These experiments investigated the effects of adolescent exposure to either cannabis smoke or THC on anxiety- and depressive-like behavior and cognitive performance in adulthood in Long-Evans rats. METHODS: Adolescent rats of both sexes were exposed to either cannabis smoke from postnatal days (P) 29-49 or ascending doses of THC from P35-45. When the rats reached adulthood (P70), anxiety-like behavior was investigated in the large open field and elevated plus maze, depressive-like behavior in the sucrose preference and forced swim tests, and cognitive function in the novel object recognition test. RESULTS: Despite sex differences on some measures in the open field, elevated plus maze, forced swim, and novel object recognition tests, there were no effects of either adolescent cannabis smoke or THC exposure, and only relatively subtle interactions between exposure conditions and sex, such that sex differences on some performance measures were slightly attenuated. CONCLUSION: Neither cannabis smoke nor THC exposure during adolescence produced robust alterations in adult behavior after a period of abstinence, suggesting that adverse effects associated with adolescent cannabis use might be due to non-cannabinoid concomitants of cannabis use.
RATIONALE: Cannabis use is common among adolescents and some research suggests that adolescent cannabis use increases the risk for depression, anxiety, and cognitive impairments in adulthood. In human studies, however, confounds may affect the association between cannabis use and the development of brain disorders. OBJECTIVES: These experiments investigated the effects of adolescent exposure to either cannabis smoke or THC on anxiety- and depressive-like behavior and cognitive performance in adulthood in Long-Evans rats. METHODS: Adolescent rats of both sexes were exposed to either cannabis smoke from postnatal days (P) 29-49 or ascending doses of THC from P35-45. When the rats reached adulthood (P70), anxiety-like behavior was investigated in the large open field and elevated plus maze, depressive-like behavior in the sucrose preference and forced swim tests, and cognitive function in the novel object recognition test. RESULTS: Despite sex differences on some measures in the open field, elevated plus maze, forced swim, and novel object recognition tests, there were no effects of either adolescent cannabis smoke or THC exposure, and only relatively subtle interactions between exposure conditions and sex, such that sex differences on some performance measures were slightly attenuated. CONCLUSION: Neither cannabis smoke nor THC exposure during adolescence produced robust alterations in adult behavior after a period of abstinence, suggesting that adverse effects associated with adolescent cannabis use might be due to non-cannabinoid concomitants of cannabis use.
Authors: Daniela Navarro; Ani Gasparyan; Francisco Navarrete; Abraham B Torregrosa; Gabriel Rubio; Marta Marín-Mayor; Gabriela B Acosta; Maria Salud Garcia-Gutiérrez; Jorge Manzanares Journal: Int J Mol Sci Date: 2022-04-26 Impact factor: 6.208
Authors: Caesar M Hernandez; Caitlin A Orsini; Shelby L Blaes; Jennifer L Bizon; Marcelo Febo; Adriaan W Bruijnzeel; Barry Setlow Journal: J Psychopharmacol Date: 2020-12-09 Impact factor: 4.562