𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Computer model of the metabolism of phenylalanine in normal subjects and in patients with phenylketonuria

✍ Scribed by Magnus Hjelm; Richard Kitney; Peter Lindsey; James Seakins


Publisher
Elsevier Science
Year
1984
Weight
661 KB
Volume
18
Category
Article
ISSN
0010-468X

No coin nor oath required. For personal study only.

✦ Synopsis


The techniques of systems analysis have been applied to the metabolism of phenylalanine in healthy subjects and in phenylketonuria to derive a computer model. The model consists of seven compartments and four biological functions. Enzyme reactions are assumed to obey Michaelis-Menten kinetics. The computer program is written in FORTRAN. A biological validation of the model has been performed. The computer model has potential value for estimating concentrations of key metabolites in human organs which are not accessible to direct analysis from measurements of metabolites in blood and urine and phenylalanine intake. Such estimates would be helpful in clinical decisions concerning modification or termination of dietary treatment in phenylketonuria.

FORTRAN Phenylalanine Phenylketonuria Systems analysis


πŸ“œ SIMILAR VOLUMES


Reproducibility of cerebral phenylalanin
✍ R. Kreis; K. Zwygart; C. Boesch; J-M. Nuoffer πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 183 KB

## Abstract The reproducibility of metabolite content determined by MR spectroscopy (MRS) is usually at best a few percent for the prominent singlets. When studying low‐concentration metabolites, like phenylalanine (Phe), where tissue content can be <100 ΞΌmol/kg, better reproducibility is paramount

The metabolism of ingested deuterium-lab
✍ Alan A. Boulton; Bruce A. Davis πŸ“‚ Article πŸ“… 1987 πŸ› John Wiley and Sons 🌐 English βš– 530 KB

Eight normal subjects ingested 125 mg of p-tyramine-P,P-\*H, hydrochloride and the 3 h and following 21 h urine collections were analysed by mass spectrometry with selected ion monitoring for the deuterated metabolites: free and conjugated p-tyramine-p,P-'H,, free p-octopamine-P-'H, , free and conju

Circadian variations of serum myoglobin
✍ Stefano Bombardieri; Aldo Clerico; Lucrezia Riente; Maria Grazia Del Chicca; Cla πŸ“‚ Article πŸ“… 1982 πŸ› John Wiley and Sons 🌐 English βš– 483 KB πŸ‘ 1 views

## Abstract Circadian variations in myoglobin levels were determined in 18 normal volunteers and in 10 patients with active polymyositis. In all the controls and in 9 of the 10 patients, serum myoglobin concentrations were highest at 9 AM, fell significantly during the day to reach a nadir between

Ultrasonography of the peroneal nerve mu
✍ A. M. Boonstra; T. W. van Weerden; L. te Strake; B. Hillen πŸ“‚ Article πŸ“… 1988 πŸ› John Wiley and Sons 🌐 English βš– 674 KB

A method for measuring the cross-sectional area (CS area) of the peroneal nerve muscle groups (PNMG) by ultrasonography is presented. The method has a good reliability and can be performed easily. The mean value of the ratio (~100) of the right-sided PNMG CS area to the left-sided PNMG CS area in ri