Antioxidant β-Carotene Does Not Quench Singlet Oxygen in Mammalian Cells

2012 ◽  
Vol 135 (1) ◽  
pp. 272-279 ◽  
Author(s):  
Gabriela N. Bosio ◽  
Thomas Breitenbach ◽  
Julieta Parisi ◽  
Miguel Reigosa ◽  
Frances H. Blaikie ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Mammalian Cells ◽  
Quench Singlet Oxygen ◽  
Β Carotene

Control of singlet oxygen production in experiments performed on single mammalian cells

2016 ◽  
Vol 321 ◽  
pp. 297-308 ◽  
Author(s):  
Michael Westberg ◽  
Mikkel Bregnhøj ◽  
Alfonso Blázquez-Castro ◽  
Thomas Breitenbach ◽  
Michael Etzerodt ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Mammalian Cells ◽  
Oxygen Production

Singlet oxygen-induced signaling effects in mammalian cells

2003 ◽  
Vol 2 (2) ◽  
pp. 88-94 ◽  
Author(s):  
Lars-Oliver Klotz ◽  
Klaus-Dietrich Kröncke ◽  
Helmut Sies
Keyword(s):  
Singlet Oxygen ◽  
Mammalian Cells

β-carotene inhibits UVA-induced matrix metalloprotease 1 and 10 expression in keratinocytes by a singlet oxygen-dependent mechanism

2004 ◽  
Vol 37 (5) ◽  
pp. 654-670 ◽  
Author(s):  
Karin Wertz ◽  
Nicole Seifert ◽  
Petra Buchwald Hunziker ◽  
Georges Riss ◽  
Adrian Wyss ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Matrix Metalloprotease ◽  
Β Carotene ◽  
Dependent Mechanism

scholarly journals Singlet Oxygen induced mutation spectrum in mammalian cells

1992 ◽  
Vol 20 (16) ◽  
pp. 4319-4323 ◽  
Author(s):  
Reginas Costa de Biologia ◽  
Denise T. Riberio ◽  
Rogerio G. Nigro ◽  
Paolo Di Mascio ◽  
Carlos F.M. Menck
Keyword(s):  
Singlet Oxygen ◽  
Mammalian Cells ◽  
Mutation Spectrum ◽  
Induced Mutation

scholarly journals 367 Scavenging Capacity of Active Oxygen Species in Blackberry

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 455E-455
Author(s):  
Shiow Y. Wang ◽  
Hongjun Jiao
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Singlet Oxygen ◽  
Hydroxyl Radicals ◽  
Fruit Juice ◽  
Active Oxygen Species ◽  
Active Oxygen ◽  
Oxygen Species ◽  
Scavenging Capacity ◽  
Β Carotene

The effect of blackberries (Rubus sp.) genotypes on antioxidant activities against superoxide radicals (O2–), hydrogen peroxide (H2O2), hydroxyl radicals (OH), and singlet oxygen (O,), was evaluated. The results were expressed as percent inhibition of active oxygen species production in the presence of fruit juice. The active oxygen radical absorbance capacity (ORAC) value referred to the net protection in the presence of fruit juice, and was expressed as micromoles of α-tocopherol, ascorbate, α-tocopherol, and β-carotene equivalents per 10 g of fresh weight for O2–, H2O2, OH, and O2, respectively. Among the different cultivars, juice of Hull' blackberry had the highest oxygen species, superoxide radicals (O2–), hydrogen peroxide (H2O2), hydroxyl radicals (OH), and singlet oxygen (O2,) scavenging capacity. Different antioxidants have their functional scavenging capacity against active oxygen species. There were interesting and marked differences among the different antioxidants in their abilities to inhibit the different active oxygen species. β-carotene had by far the highest scavenging activity against O2– but had absolutely no effect on H2O2. Ascorbic acid was the best at inhibiting H2O2 free radical activity. For OH, there was a wide range of scavenging capacities with α-tocopherol the highest and ascorbic acid the lowest. Glutathione had higher O2– scavenging capacity compared to the other antioxidants.

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