Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2009-6-30
pubmed:abstractText
Receptor mediated endocytosis (RME) plays a major role in the disposition of therapeutic protein drugs in the body. It is suspected to be a major source of nonlinear pharmacokinetic behavior observed in clinical pharmacokinetic data. So far, mostly empirical or semi-mechanistic approaches have been used to represent RME. A thorough understanding of the impact of the properties of the drug and of the receptor system on the resulting nonlinear disposition is still missing, as is how to best represent RME in pharmacokinetic models. In this article, we present a detailed mechanistic model of RME that explicitly takes into account receptor binding and trafficking inside the cell and that is used to derive reduced models of RME which retain a mechanistic interpretation. We find that RME can be described by an extended Michaelis-Menten model that accounts for both the distribution and the elimination aspect of RME. If the amount of drug in the receptor system is negligible a standard Michaelis-Menten model is capable of describing the elimination by RME. Notably, a receptor system can efficiently eliminate drug from the extracellular space even if the total number of receptors is small. We find that drug elimination by RME can result in substantial nonlinear pharmacokinetics. The extent of nonlinearity is higher for drug/receptor systems with higher receptor availability at the membrane, or faster internalization and degradation of extracellular drug. Our approach is exemplified for the epidermal growth factor receptor system.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-10404636, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-11060328, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-11129168, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-11597400, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-11999290, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-12154371, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-12202782, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-12480339, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-12488547, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-12615732, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-12817524, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-14707493, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-15295780, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-15383606, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-15389672, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-15572377, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-15613446, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-15828849, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-16180117, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-16469301, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-16885363, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-17542642, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-17602769, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-17894407, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-18218786, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-18319714, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-2305263, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-6269748, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-6644555, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-7229908, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-7334463, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-7765094, http://linkedlifedata.com/resource/pubmed/commentcorrection/19554432-8144591
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1573-8744
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
36
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
239-60
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Nonlinear pharmacokinetics of therapeutic proteins resulting from receptor mediated endocytosis.
pubmed:affiliation
Hamilton Institute, National University of Ireland Maynooth, Maynooth, Ireland.
pubmed:publicationType
Journal Article, Comparative Study