title: Therapeutic low-intensity red laser for herpes labialis on plasmid survival and bacterial transformation.
abstract: A low-intensity laser is used in treating herpes labialis based on the biostimulative effect, albeit the photobiological basis is not well understood. In this work experimental models based on Escherichia coli cultures and plasmids were used to evaluate effects of low-intensity red laser on DNA at fluences for treatment of herpes labialis. To this end, survival and transformation efficiency of plasmids in E. coli AB1157 (wild type), BH20 (fpg/mutM(-)) and BW9091 (xthA(-)), content of the supercoiled form of plasmid DNA, as well as nucleic acids and protein content from bacterial cultures exposed to the laser, were evaluated. The data indicate low-intensity red laser: (i) alters the survival of plasmids in wild type, fpg/mutM(-) and xthA(-)E. coli cultures depending of growth phase, (ii) alters the content of the supercoiled form of plasmids in the wild type and fpg/mutM(-)E. coli cells, (iii) alters the content of nucleic acids and proteins in wild type E. coli cells, (iv) alters the transformation efficiency of plasmids in wild type and fpg/mutM(-)E. coli competent cells. These data could be used to understand positive effects of low-intensity lasers on herpes labialis treatment.
authors.affiliation: Centro de Ciências da Saúde, Centro Universitário Serra dos Órgãos, Avenida Alberto Torres, 111, Teresópolis, Rio de Janeiro, 25964004, Brazil.
authors.forename: Luiz Philippe da Silva
authors.initials: LP
authors.lastname: Sergio
authors.forename: Roberta da Silva
authors.initials: Rda S
authors.lastname: Marciano
authors.forename: Gleica Rocha
authors.initials: GR
authors.lastname: Teixeira
authors.forename: Keila da Silva
authors.initials: Kda S
authors.lastname: Canuto
authors.forename: Giovanni Augusto Castanheira
authors.initials: GA
authors.lastname: Polignano
authors.forename: Oscar Roberto
authors.initials: OR
authors.lastname: Guimarães
authors.forename: Mauro
authors.initials: M
authors.lastname: Geller
authors.forename: Flavia
authors.initials: F
authors.lastname: de Paoli
authors.forename: Adenilson de Souza
authors.initials: Ade S
authors.lastname: da Fonseca
mesh_terms: D004926:Escherichia coli / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects*; D029968:Escherichia coli Proteins / Q000378:metabolism; D006560:Herpes Labialis / Q000235:genetics*; D007834:Lasers; D009696:Nucleic Acids / Q000378:metabolism; D010957:Plasmids / Q000737:chemistry / Q000378:metabolism*; D014169:Transformation, Bacterial / Q000528:radiation effects
chemical_list: D029968:Escherichia coli Proteins; D009696:Nucleic Acids