Comput Methods Programs Biomed - Interstitial insulin kinetic parameters for a 2-compartment insulin model with saturable clearance.

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Resumo

Glucose-insulin system models are commonly used for identifying insulin sensitivity. With physiological, 2-compartment insulin kinetics models, accurate kinetic parameter values are required for reliable estimates of insulin sensitivity. This study uses data from 6 published microdialysis studies to determine the most appropriate parameter values for the transcapillary diffusion rate (n(I)) and cellular insulin clearance rate (n(C)). The 6 studies (12 data sets) used microdialysis techniques to simultaneously obtain interstitial and plasma insulin concentrations. The reported plasma insulin concentrations were used as input and interstitial insulin concentrations were simulated with the interstitial insulin kinetics sub-model. These simulated results were then compared to the reported interstitial measurements and the most appropriate set of parameter values was determined across the 12 data sets by combining the results. Interstitial insulin kinetic parameters values n(I)=n(C)=0.0060 min? were shown to be the most appropriate. These parameter values are associated with an effective, interstitial insulin half-life, t(?)=58 min, within the range of 25-130 min reported by others.

Resumo Limpo

glucoseinsulin system model common use identifi insulin sensit physiolog compart insulin kinet model accur kinet paramet valu requir reliabl estim insulin sensit studi use data publish microdialysi studi determin appropri paramet valu transcapillari diffus rate ni cellular insulin clearanc rate nc studi data set use microdialysi techniqu simultan obtain interstiti plasma insulin concentr report plasma insulin concentr use input interstiti insulin concentr simul interstiti insulin kinet submodel simul result compar report interstiti measur appropri set paramet valu determin across data set combin result interstiti insulin kinet paramet valu ninc min shown appropri paramet valu associ effect interstiti insulin halflif t min within rang min report other

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