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Hagemeister M, Hamilton L, Wandrey N, Hill M, Mounce E, Mosel N, Lytle K, Redinger M, Boley J, Fancher N, Haynes A, Fill I, Cole PA, Hill E, Moxley MA, Thomas AA. Evaluation of Rhodanine Indolinones as AANAT Inhibitors. ChemMedChem 2024; 19:e202300567. [PMID: 37984928 PMCID: PMC10843758 DOI: 10.1002/cmdc.202300567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/18/2023] [Accepted: 11/19/2023] [Indexed: 11/22/2023]
Abstract
Circadian rhythm (CR) dysregulation negatively impacts health and contributes to mental disorders. The role of melatonin, a hormone intricately linked to CR, is still a subject of active study. The enzyme arylalkylamine N-acetyltransferase (AANAT) is responsible for melatonin synthesis, and it is a potential target for disorders that involve abnormally high melatonin levels, such as seasonal affective disorder (SAD). Current AANAT inhibitors suffer from poor cell permeability, selectivity, and/or potency. To address the latter, we have employed an X-ray crystal-based model to guide the modification of a previously described AANAT inhibitor, containing a rhodanine-indolinone core. We made various structural modifications to the core structure, including testing the importance of a carboxylic acid group thought to bind in the CoA site, and we evaluated these changes using MD simulations in conjunction with enzymatic assay data. Additionally, we tested three AANAT inhibitors in a zebrafish locomotion model to determine their effects in vivo. Key discoveries were that potency could be modestly improved by replacing a 5-carbon alkyl chain with rings and that the central rhodanine ring could be replaced by other heterocycles and maintain potency.
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Affiliation(s)
- Mackenzie Hagemeister
- Department of Psychology, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Luke Hamilton
- Department of Biology, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Nicole Wandrey
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Mackinzi Hill
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Emery Mounce
- Department of Psychology, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Noah Mosel
- Department of Psychology, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Katie Lytle
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Makenna Redinger
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Jake Boley
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Nathan Fancher
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Alexis Haynes
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Ianna Fill
- Department of Psychology, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Philip A Cole
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Evan Hill
- Department of Psychology, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Michael A Moxley
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
| | - Allen A Thomas
- Department of Chemistry, University of Nebraska at Kearney, Kearney, NE, 69949, USA
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