|
1
|
Guillon C, Jan YH, Heck DE, Mariano TM, Rapp RD, Jetter M, Kardos K, Whittemore M, Akyea E, Jabin I, Laskin JD, Heindel ND. Phototoxicity of 7-oxycoumarins with keratinocytes in culture. Bioorg Chem 2019; 89:103014. [PMID: 31170642 DOI: 10.1016/j.bioorg.2019.103014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 02/08/2019] [Revised: 05/23/2019] [Accepted: 05/24/2019] [Indexed: 10/26/2022]
Abstract
Seventy-one 7-oxycoumarins, 66 synthesized and 5 commercially sourced, were tested for their ability to inhibit growth in murine PAM212 keratinocytes. Forty-nine compounds from the library demonstrated light-induced lethality. None was toxic in the absence of UVA light. Structure-activity correlations indicate that the ability of the compounds to inhibit cell growth was dependent not only on their physiochemical characteristics, but also on their ability to absorb UVA light. Relative lipophilicity was an important factor as was electron density in the pyrone ring. Coumarins with electron withdrawing moieties - cyano and fluoro at C3 - were considerably less active while those with bromines or iodine at that location displayed enhanced activity. Coumarins that were found to inhibit keratinocyte growth were also tested for photo-induced DNA plasmid nicking. A concentration-dependent alteration in migration on neutral gels caused by nicking was observed.
Collapse
Affiliation(s)
| | - Yi-Hua Jan
- Department of Environmental and Occupational Health, Rutgers University School of Public Health, Piscataway, NJ 08854, USA
| | - Diane E Heck
- Department of Environmental Science, New York Medical College, Valhalla, NY 10595, USA
| | - Thomas M Mariano
- Department of Environmental and Occupational Health, Rutgers University School of Public Health, Piscataway, NJ 08854, USA
| | - Robert D Rapp
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA
| | - Michele Jetter
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA
| | - Keith Kardos
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA
| | | | - Eric Akyea
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA
| | - Ivan Jabin
- Laboratoire de Chimie Organique, Université Libre de Bruxelles, B-1050 Brussels, Belgium
| | - Jeffrey D Laskin
- Department of Environmental and Occupational Health, Rutgers University School of Public Health, Piscataway, NJ 08854, USA
| | - Ned D Heindel
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA
| |
Collapse
|
|
2
|
Abstract
In order to access the damaging mechanismsof DNA and its bases on themolecular level by T Hz radiation, it isnecessary to create a database of assessingdamage at different spectral regions.Possible damage by T Hz radiation will beassessed by comparison. Furthermore, theexpose of the cytosine to radiation at157 nm, suggest that photochemical bondbreaking is the only damaging mechanism inthe vacuum ultraviolet region of thespectrum, (157-170) nm where one photonbreaks one chemical bond.
Collapse
Affiliation(s)
- E Sarantopoulou
- National Hellenic Research Foundation, TPCI, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
| | | | | | | | | |
Collapse
|