A
Alexandre Umpierrez Amaral
Researcher at Universidade Federal do Rio Grande do Sul
Publications - 88
Citations - 1553
Alexandre Umpierrez Amaral is an academic researcher from Universidade Federal do Rio Grande do Sul. The author has contributed to research in topics: Oxidative stress & Mitochondrion. The author has an hindex of 20, co-authored 80 publications receiving 1238 citations.
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Journal ArticleDOI
Mitochondrial dysfunction in fatty acid oxidation disorders: insights from human and animal studies.
TL;DR: Patients affected by FAOD commonly present with hepatopathy, cardiomyopathy, skeletal myopathy and encephalopathy, suggesting that lipotoxicity may contribute to their pathogenesis.
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α-Ketoisocaproic acid and leucine provoke mitochondrial bioenergetic dysfunction in rat brain
Alexandre Umpierrez Amaral,Guilhian Leipnitz,Carolina Gonçalves Fernandes,Bianca Seminotti,Patrícia F. Schuck,Moacir Wajner +5 more
TL;DR: The present data indicate that KIC acts as an uncoupler of oxidative phosphorylation and as a metabolic inhibitor possibly through its inhibitory effect on alpha-ketoglutarate dehydrogenase activity, while Leu acts asA metabolic inhibitor.
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Experimental evidence that phenylalanine provokes oxidative stress in hippocampus and cerebral cortex of developing rats.
Carolina Gonçalves Fernandes,Guilhian Leipnitz,Bianca Seminotti,Alexandre Umpierrez Amaral,Ângela Zanatta,Carmen Regla Vargas,Carlos Severo Dutra Filho,Moacir Wajner +7 more
TL;DR: The data indicate that Phe elicits oxidative stress in the hippocampus, a structure mainly involved with learning/memory, and also in the cerebral cortex, which is severely damaged in PKU patients, and it is presumed that this pathomechanism may be involved at least in part in the severe cognitive deficit and in the characteristic cortical atrophy observed in this disorder.
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Conventional and ultrasound-assisted methods for extraction of bioactive compounds from red araçá peel (Psidium cattleianum Sabine)
Monalise Marcante Meregalli,Bruna Maria Saorin Puton,Fernanda Dal'Maso Camera,Alexandre Umpierrez Amaral,Jamile Zeni,Rogério Luis Cansian,Marcelo Luis Mignoni,Geciane Toniazzo Backes +7 more
TL;DR: In this article, the authors compared the performance of ultrasound-assisted and conventional extractions of red araca peel and showed promising results for the ultrasound assisted and conventional extraction, respectively.
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Experimental Evidence that Methylmalonic Acid Provokes Oxidative Damage and Compromises Antioxidant Defenses in Nerve Terminal and Striatum of Young Rats
Carolina Gonçalves Fernandes,Clarissa Günther Borges,Bianca Seminotti,Alexandre Umpierrez Amaral,Lisiane Aurélio Knebel,Paula Eichler,Anderson Büker de Oliveira,Guilhian Leipnitz,Moacir Wajner +8 more
TL;DR: Investigation of in-vitro effects of MMA and PA on important parameters of lipid and protein oxidative damage and on the production of reactive species in synaptosomes from cerebrum of developing rats demonstrated the participation of neuronal cells in MMA-elicited oxidative damage.