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Loren Berry

Researcher at Amgen

Publications -  27
Citations -  1236

Loren Berry is an academic researcher from Amgen. The author has contributed to research in topics: In vivo & Pharmacokinetics. The author has an hindex of 17, co-authored 27 publications receiving 1123 citations.

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Esterase Activities in the Blood, Liver and Intestine of Several Preclinical Species and Humans

TL;DR: Substantial species differences in activity of these esterases were observed between the mouse, rat, dog monkey and human, and such species differences must be considered when using these preclinical species to optimize the pharmacokinetic properties of ester compounds intended for human use.
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An examination of IC50 and IC50-shift experiments in assessing time-dependent inhibition of CYP3A4, CYP2D6 and CYP2C9 in human liver microsomes.

TL;DR: The relationship between time-dependent inactivation (TDI) and IC50 is examined using a consolidated method for evaluating CYP450 inhibition during drug discovery and the "shifted IC50" could be used to estimate, the K(I) and TDI potency ratio k(inact)/K( I) to within 2-fold in most cases.
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Long-acting κ opioid antagonists nor-BNI, GNTI and JDTic: pharmacokinetics in mice and lipophilicity

TL;DR: The very slow elimination of JDTic from brain is surprising given that it undergoes active efflux, has modest affinity for homogenate, and has a shorter duration of action than nor-BNI under these conditions, and it is proposed that this persistence may result from entrapment in cellular compartments such as lysosomes.