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Marcelo Hermes-Lima
University of Brasília
83Publications
31H-index
4,073Citations
Publications 83
Newest
#2Márcio Alberto Geihs (UFRGS: Universidade Federal do Rio Grande do Sul)H-Index: 7
Last.Marcelo Hermes-LimaH-Index: 31
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Abstract Preparation for oxidative stress (POS), i.e., the upregulation of endogenous antioxidants, is a widespread response of animals exposed to extreme conditions. This response has been described for more than 80 animal species belonging to eight phyla during hypometabolism or situations that limit oxygen availability. The pattern of the typical POS-response, in which a mild redox imbalance triggers antioxidant adjustments that results in increased tolerance to subsequent oxidative insults, ...
1 CitationsSource
#1Maximiliano Giraud-Billoud (Facultad de Ciencias Médicas)H-Index: 2
Last.Marcelo Hermes-Lima (UnB: University of Brasília)H-Index: 31
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Abstract Freezing, dehydration, salinity variations, hypoxia or anoxia are some of the environmental constraints that many organisms must frequently endure. Organisms adapted to these stressors often reduce their metabolic rates to maximize their chances of survival. However, upon recovery of environmental conditions and basal metabolic rates, cells are affected by an oxidative burst that, if uncontrolled, leads to (oxidative) cell damage and eventually death. Thus, a number of adapted organisms...
1 CitationsSource
#1Daniel C. Moreira (UnB: University of Brasília)H-Index: 8
#2Alexis F. Welker (UnB: University of Brasília)H-Index: 6
Last.Marcelo Hermes-Lima (UnB: University of Brasília)H-Index: 31
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Juvenile tegu lizards (Salvator merianae) experience gradual and mild temperature changes from autumn to winter in their habitat. This tropical/subtropical reptile enter a state of dormancy, with an 80% reduction in metabolic rate, that remains almost constant during winter. The redox metabolism in non-mammalian vertebrates that hibernate under such distinguished conditions is poorly understood. We analyzed the redox metabolism in the intestine of juvenile tegus during different stages of their ...
Source
#1Marcus F. Oliveira (UFRJ: Federal University of Rio de Janeiro)H-Index: 30
#2Márcio Alberto Geihs (UFRGS: Universidade Federal do Rio Grande do Sul)H-Index: 7
Last.Marcelo Hermes-Lima (UnB: University of Brasília)H-Index: 31
view all 5 authors...
8 CitationsSource
#1Luana T. Dalvi (UnB: University of Brasília)H-Index: 3
#2Daniel C. Moreira (UnB: University of Brasília)H-Index: 8
Last.Marcelo Hermes-Lima (UnB: University of Brasília)H-Index: 31
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Source
#1Daniel C. Moreira (UnB: University of Brasília)H-Index: 8
#2Marcus F. Oliveira (UFRJ: Federal University of Rio de Janeiro)H-Index: 30
Last.Marcelo Hermes-Lima (UnB: University of Brasília)H-Index: 31
view all 6 authors...
Source
#1You R. ChngH-Index: 7
#2Jasmine L. Y. OngH-Index: 7
Last.Marcelo Hermes-LimaH-Index: 31
view all 10 authors...
2 CitationsSource
#1Daniel C. Moreira (UnB: University of Brasília)H-Index: 8
#2Marcus F. Oliveira (UFRJ: Federal University of Rio de Janeiro)H-Index: 30
Last.Marcelo Hermes-Lima (UnB: University of Brasília)H-Index: 31
view all 6 authors...
Survival under stress, such as exposure to hypoxia, anoxia, freezing, dehydration, air exposure of water breathing organisms and estivation, is commonly associated to enhanced endogenous antioxidants, a phenomenon coined ‘preparation for oxidative stress’ (POS). The regulation of free radical metabolism seems to be crucial under these selective pressures, since this response is widespread among animals. A hypothesis of how POS works at the molecular level was recently proposed and relies on two ...
9 CitationsSource
#1Estêvão Cubas Rolim (UnB: University of Brasília)H-Index: 1
#2J. Oliveira (UnB: University of Brasília)H-Index: 2
Last.Marcelo Hermes-Lima (UnB: University of Brasília)H-Index: 31
view all 9 authors...
To boost active learning in undergraduate students, they were given the task of preparing blogs on topics of clinical biochemistry. This “experiment” lasted for 12 teaching-semesters (from 2008 to 2013), and included a survey on the blogs' usefulness at the end of each semester. The survey (applied in the 2008-2010 period) used a Likert-like questionnaire with eight questions and a 1-to-6 scale, from “totally disagree” to “fully agree.” Answers of 428 students were analyzed and indicated overall...
1 CitationsSource
#1Luana T. Dalvi (UnB: University of Brasília)H-Index: 3
#2Daniel C. Moreira (UnB: University of Brasília)H-Index: 8
Last.Marcelo Hermes-Lima (UnB: University of Brasília)H-Index: 31
view all 6 authors...
Abstract Polyphenols are reported to have some health benefits, which are link to their antioxidant properties. In the case of ellagic acid (EA), there is evidence that it has free radical scavenger properties and that it is able to form complexes with metal ions. However, information on a possible link between the formation of iron-EA complexes and their interference in Haber-Weiss/Fenton reactions was not yet determined. Thus, the present study investigated the in vitro antioxidant mechanism o...
12 CitationsSource
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