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Lee NJ, Song JM, Cho HJ, Sung YM, Lee T, Chung A, Hong SH, Cifelli JL, Rubinshtein M, Habib LK, Capule CC, Turner RS, Pak DTS, Yang J, Hoe HS. Hexa (ethylene glycol) derivative of benzothiazole aniline promotes dendritic spine formation through the RasGRF1-Ras dependent pathway. Biochim Biophys Acta Mol Basis Dis 2015; 1862:284-95. [PMID: 26675527 DOI: 10.1016/j.bbadis.2015.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 11/16/2015] [Accepted: 12/04/2015] [Indexed: 11/24/2022]
Abstract
Our recent study demonstrated that an amyloid-β binding molecule, BTA-EG4, increases dendritic spine number via Ras-mediated signaling. To potentially optimize the potency of the BTA compounds, we synthesized and evaluated an amyloid-β binding analog of BTA-EG4 with increased solubility in aqueous solution, BTA-EG6. We initially examined the effects of BTA-EG6 on dendritic spine formation and found that BTA-EG6-treated primary hippocampal neurons had significantly increased dendritic spine number compared to control treatment. In addition, BTA-EG6 significantly increased the surface level of AMPA receptors. Upon investigation into the molecular mechanism by which BTA-EG6 promotes dendritic spine formation, we found that BTA-EG6 may exert its effects on spinogenesis via RasGRF1-ERK signaling, with potential involvement of other spinogenesis-related proteins such as Cdc42 and CDK5. Taken together, our data suggest that BTA-EG6 boosts spine and synapse number, which may have a beneficial effect of enhancing neuronal and synaptic function in the normal healthy brain.
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Affiliation(s)
- Nathanael J Lee
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Jung Min Song
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Hyun-Ji Cho
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), Cheomdan-ro, Dong-gu, Daegu 701-300, Republic of Korea
| | - You Me Sung
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC 20057, USA; Department of Neurology, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Taehee Lee
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Andrew Chung
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Sung-Ha Hong
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC 20057, USA; Department of Neurology, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Jessica L Cifelli
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA
| | - Mark Rubinshtein
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA
| | - Lila K Habib
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Christina C Capule
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA
| | - R Scott Turner
- Department of Neurology, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Daniel T S Pak
- Department of Pharmacology, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Jerry Yang
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA
| | - Hyang-Sook Hoe
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC 20057, USA; Department of Neurology, Georgetown University Medical Center, Washington, DC 20057, USA; Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), Cheomdan-ro, Dong-gu, Daegu 701-300, Republic of Korea.
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