User profiles for Peter J. O’Brien

Peter James O'Brien

- Verified email at ucd.ie - Cited by 8937

Peter Joseph O'Brien

- Verified email at pfizer.com - Cited by 4000

Identification of a mutation in porcine ryanodine receptor associated with malignant hyperthermia

…, S De Leon, VK Khanna, JE Weiler, PJ O'Brien… - Science, 1991 - science.org
Malignant hyperthermia (MH) causes neurological, liver, and kidney damage and death in
humans and major economic losses in the swine industry. A single point mutation in the …

Potential toxicity of flavonoids and other dietary phenolics: significance for their chemopreventive and anticancer properties

G Galati, PJ O'brien - Free radical biology and medicine, 2004 - Elsevier
Flavonoids, including isoflavones, are natural components in our diet and, with the burgeoning
interest in alternative medicine, are increasingly being ingested by the general population…

Fit-for-purpose method development and validation for successful biomarker measurement

…, JA Rogers, R Millham, PJ O'brien, J Sailstad… - Pharmaceutical …, 2006 - Springer
Despite major advances in modern drug discovery and development, the number of new
drug approvals has not kept pace with the increased cost of their development. Increasingly, …

Aldehyde sources, metabolism, molecular toxicity mechanisms, and possible effects on human health

PJ O'Brien, AG Siraki, N Shangari - Critical reviews in toxicology, 2005 - Taylor & Francis
Aldehydes are organic compounds that are widespread in nature. They can be formed
endogenously by lipid peroxidation (LPO), carbohydrate or metabolism ascorbate autoxidation, …

Prooxidant activity and cellular effects of the phenoxyl radicals of dietary flavonoids and other polyphenolics

G Galati, O Sabzevari, JX Wilson, PJ O'Brien - Toxicology, 2002 - Elsevier
Dietary polyphenolics in fruits, vegetables, wines, spices and herbal medicines have beneficial
antioxidant, anti-inflammatory and anticancer effects. However, we have observed that …

Carcinogenic metal induced sites of reactive oxygen species formation in hepatocytes

J Pourahmad, JOB Peter, F Jokar, B Daraei - Toxicology in vitro, 2003 - Elsevier
… Author links open overlay panel Jalal Pourahmad a , Peter J OBrien b , Farzaneh Jokar a ,
… ROS formation and cytotoxicity induced by added H 2 O 2 or generated by the intracellular …

Flavonoid B-ring chemistry and antioxidant activity: fast reaction kinetics

AS Pannala, TS Chan, PJ O'Brien… - … and biophysical research …, 2001 - Elsevier
Rapid scavenging of the model stable radical cation, ABTS •+ , has been applied to screen
for the antioxidant activity of flavonoids. The reaction follows two distinct phases. For …

Mitochondrial function and toxicity: role of the B vitamin family on mitochondrial energy metabolism

…, WR Bruce, N Shangari, R Mehta, PJ O'Brien - Chemico-biological …, 2006 - Elsevier
The B vitamins are water-soluble vitamins required as coenzymes for enzymes essential for
cell function. This review focuses on their essential role in maintaining mitochondrial …

An intracellular GSH-peroxidase with a lipid peroxide substrate

C Little, PJ O'Brien - Biochemical and biophysical research communications, 1968 - Elsevier
Studies have been made on the kinetics, products and properties of liver supernatant-catalyzed
GSH oxidation by linoleic acid hydroperoxide (LAHPO). It was found that an enzymic …

Cellular and in vivo hepatotoxicity caused by green tea phenolic acids and catechins

G Galati, A Lin, AM Sultan, PJ O'Brien - Free Radical Biology and Medicine, 2006 - Elsevier
Tea phenolic acids and catechins containing gallic acid moieties are most abundant in
green tea, and various medical benefits have been proposed from their consumption. In the …