Publications -- Michael B. Gatch

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This collection is limited to articles published under the terms of a creative commons license or other open access publishing agreement since 2016. It is not intended as a complete list of the author's works.


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    Locomotor and discriminative stimulus effects of three benzofuran compounds in comparison to abused psychostimulants
    (Elsevier B.V., 2023-08-21) Hill, Rebecca D.; Shetty, Ritu A.; Sumien, Nathalie; Forster, Michael J.; Gatch, Michael B.
    AIMS: Benzofurans are used recreationally, due their ability to cause psychostimulant and/or entactogenic effects, but unfortunately produce substantial adverse effects, including death. Three benzofurans 5-(2-aminopropyl)-2,3-dihydrobenzofuran (5-APDB), 5-(2-aminopropyl)-2,3-dihydrobenzofuran (5-MAPB) and 6-(2-aminopropyl) benzofuran (6-APB) were tested to determine their behavioral effects in comparison with 2,3-methylenedioxymethamphetamine (MDMA), cocaine, and methamphetamine. METHODS: Locomotor activity was tested in groups of 8 male Swiss-Webster mice in an open-field task to screen for locomotor stimulant or depressant effects and to identify behaviorally active doses and times of peak effect. Discriminative stimulus effects were tested in groups of 6 male Sprague-Dawley rats trained to discriminate MDMA (1.5 mg/kg), cocaine (10 mg/kg), or methamphetamine (1 mg/kg) from saline using a FR 10 for food in a two-lever operant task. RESULTS: In the locomotor activity test, MDMA (ED(50) = 8.34 mg/kg) produced peak stimulant effects 60 to 80 min following injection. 5-MAPB (ED(50) = 0.92 mg/kg) produced modest stimulant effects 50 to 80 min after injection, whereas 6-APB (ED(50) = 1.96 mg/kg) produced a robust stimulant effect 20 to 50 min after injection. 5-APDB produced an early depressant phase (ED(50) = 3.38 mg/kg) followed by a modest stimulant phase (ED(50) = 2.57 mg/kg) 20 to 50 min after injection. In the drug discrimination tests, 5-APDB (ED(50) = 1.02 mg/kg), 5-MAPB (ED(50) = 1.00 mg/kg) and 6-APB (ED(50) = 0.32 mg/kg) fully substituted in MDMA-trained rats, whereas only 5-MAPB fully substituted for cocaine, and no compounds fully substituted for methamphetamine. CONCLUSIONS: The synthetic benzofuran compound 5-APDB and 5-MAPB produced weak locomotor effects, whereas 6-APB produced robust locomotor stimulant effects. All compounds were more potent than MDMA. All three compounds fully substituted in MDMA-trained rats suggesting similar subjective effects. Taken together, these results suggest that these benzofuran compounds may have abuse liability as substitutes for MDMA.