Search Results - "Asad, N. R"

Biological effects of stevioside on the survival of Escherichia coli strains and plasmid DNA by Nunes, A. P. M, Mattos, J. C. P. De, Ferreira-Machado, S. C, Nunes, R. M, Asad, N. R, Dantas, F. J. S, Bezerra, R. J. A. C, Caldeira-de-Araujo, A

“…Stevioside is widely used daily in many countries as a non-caloric sugar substitute. Its sweetening power is higher than that of sucrose by approximately…”
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Reactive oxygen species mediate lethality induced by far-UV in Escherichia coli cells by Gomes, A A, Silva-Júnior, A C T, Oliveira, E B, Asad, L M B O, Reis, N C S C, Felzenszwalb, I, Kovary, K, Asad, N R

“…The involvement of reactive oxygen species (ROS) in the induction of DNA damage to Escherichia coli cells caused by UVC (254 nm) irradiation was studied. We…”
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Effects of metal ion chelators on DNA strand breaks and inactivation produced by hydrogen peroxide in Escherichia coli: detection of iron-independent lesions by ASAD, N. R, LEITAO, A. C

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Mutagenicity induced by UVC in Escherichia coli cells: Reactive oxygen species involvement by Silva-Júnior, A C T, Asad, L M B O, Felzenszwalb, I, Asad, N R

“…We previously demonstrated that reactive oxygen species (ROS) could be involved in the DNA damage induced by ultraviolet-C (UVC). In this study, we evaluated…”
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The role of Fpg protein in UVC-induced DNA lesions by Silva-Júnior, A C T, Asad, L M B O, Felzenszwalb, I, Asad, N R

“…We previously demonstrated that reactive oxygen species (ROS) could be involved in ultraviolet-C (UVC)-induced DNA damage in Escherichia coli cells. In the…”
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Adaptive response to H2O2 protects against SnCl2 damage: the OxyR system involvement by Assis, M.L.B, De Mattos, J.C.P, Caceres, M.R, Dantas, F.J.S, Asad, L.M.B.O, Asad, N.R, Bezerra, R.J.A.C, Caldeira-de-Araújo, A, Bernardo-Filho, M

“…The stannous ion, mainly the stannous chloride (SnCl2) salt form, is widely used as a reducing agent to label radiotracers with technetium-99m (99mTc). These…”
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Does UVB radiation induce SoxS gene expression in Escherichia coli cells? by Gomes, A A, Asad, L M B O, Felzenszwalb, I, Leitão, A C, Silva, A B, Guillobel, H C R, Asad, N R

“…The SoxRS regulon is induced when bacterial cells are exposed to redox-cycling agents such as menadione or paraquat. In this paper it is shown that a physical…”
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Role of SOS and OxyR systems in the repair of Escherichia coli submitted to hydrogen peroxide under low iron conditions by Asad, L.M.B.O., Asad, N.R., Silva, A.B., de Almeida, C.E.B., Leitão, A.C.

“…There are at least two mechanisms by which H 2O 2 induces DNA lesions in Escherichia coli: one in the presence of physiological iron levels and the other in…”
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Fpg and UvrA proteins participate in the repair of DNA lesions induced by hydrogen peroxide in low iron level in Escherichia coli by Asad, N.R., de Almeida, C.E.B., Asad, L.M.B.O., Felzenszwalb, I., Leitão, A.C.

“…The survival of different DNA repair mutant strains of Escherichia coli treated with H 2O 2 was evaluated in the presence or absence of an iron chelator…”
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Biological effects of stevioside on the survival of Escherichia colistrains and plasmid DNA by Nunes, A. P. M, Mattos, J. C. P. De, Ferreira-Machado, S. C., Nunes, R. M., Asad, N. R., Dantas, F. J. S., Bezerra, R. J. A. C., Caldeira-de-Araujo, A.

“…Stevioside is widely used daily in many countries as a non-caloric sugar substitute. Its sweetening power is higher than that of sucrose by approximately…”
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Effects of Iron Limitation on Adherence and Cell Surface Carbohydrates of Corynebacterium diphtheriae Strains by DE OLIVEIRA MOREIRA, Lilian, FEITOSA BRAGA ANDRADE, Arnaldo, DAMASCENO VALE, Marcio, SILVA SOUZA, Sonia Maria, HIRATA, Raphael JR, OLIVEIRA BUARQUE ASAD, Lidia Maria, RIBEIRO ASAD, Nasser, MONTEIRO-LEAL, Luiz Henrique, PREVIATO, Jasé Osvaldo, MATTOS-GUARALDI, Ana Luiza

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Lethal interaction between hydrogen peroxide and o-phenanthroline in Escherichia coli by Asad, N R, Asad, L M, Almeida, C E, Leitão, A C

“…The iron chelator o-phenanthroline enhances the lethal effect of H2O2 about four hundred times in Escherichia coli when both substances are added…”
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Participation of stress-inducible systems and enzymes involved in BER and NER in the protection of Escherichia coli against cumene hydroperoxide by Asad, L.M.B.O, Medeiros, D.C, Felzenszwalb, I, Leitão, A.C, Asad, N.R

“…We studied the participation of the stress-inducible systems, as the OxyR, SoxRS and SOS regulons in the protection of Escherichia coli cells against lethal…”
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Effects of low iron conditions on the repair of DNA lesions induced by Cumene hydroperoxide in Escherichia coli cells by Asad, L.M.B.O, Medeiros, D.C, Felzenszwalb, I, Leitão, A.C, Asad, N.R

“…In the present study, we evaluated the sensitivity of different Escherichia coli strains to Cumene hydroperoxide (CHP) treatment under distinct conditions of…”
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Effects of 1,10-phenanthroline and hydrogen peroxide in Escherichia coli: lethal interaction by Furtado, Frederico A.C., Asad, Nasser R., Leitão, Alvaro C.

“…It has been observed that when Escherichia coli cells are treated simultaneously with phenanthroline and H2O2, there is a lethal interaction. In order to…”
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Hydrogen peroxide induces protection against lethal effects of cumene hydroperoxide in Escherichia coli cells: an Ahp dependent and OxyR independent system? by Asad, Nasser R, Asad, Lı́dia M.B.O, Silva, André B, Felzenszwalb, Israel, Leitão, Alvaro C

“…Pretreatment with 2.5 mM H2O2 protects bacterial cells against cumene hydroperoxide killing. This response is independent of the OxyR system, but possibly…”
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Hydrogen peroxide effects in Escherichia coli cells by Asad, N R, Asad, L M, Silva, A B, Felzenszwalb, I, Leitão, A C

“…We analyzed DNA lesions produced by H2O2 under low iron conditions, the cross adaptive response and the synergistic lethal effect produced by iron…”
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Hydrogen peroxide induces protection against N-methyl-N′-nitro-N-nitrosoguanidine (MNNG) effects in Escherichia coli by Asad, Lı́dia M.B.O, Asad, Nasser R, Silva, André B, Felzenszwalb, Israel, Leitão, Alvaro C

“…Cross-adaptive response is defined as the capacity of cells to become resistant to a lethal agent when pretreated with a different lethal substance. In the…”
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H2O2-induced cross-protection against UV-C killing in Escherichia coli is blocked in a lexA (Def) background by Asad, L M, de Carvalho, A A, Felzenszwalb, I, Leitão, A C, Asad, N R

“…Pretreatment with 2.5 mM H2O2 protects E. coli cells against UV-C killing, a phenomenon independent of LexA cleavage. In this paper, we observe that this…”
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Hydrogen peroxide induces the repair of UV-damaged DNA in Escherichia coli : a lexA-independent but uvrA- and recA-dependent mechanism by ASAD, L. M. B. O, DE ALMEIDA, C. E. B, DA SILVA, A. B, ASAD, N. R, LEITAO, A. C

“…Pretreatment with 2.5 mM H sub(2)O sub(2) protects bacterial cells against UV killing, a phenomenon that is independent of the SOS response. This protection…”
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