caa a22 4500 46574270X CHVBK 20180323111812.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02021555 doi (NATIONALLICENCE)springer-10.1007/BF02021555 The influence of nutritional factors on biopterin excretion in laboratory animals [Elektronische Daten] [M. Koller, M. Goldberg, G. Schramm, M. Merkenschlager] Summary: Nutritional influences on urinary total biopterin levels in rats and pigs were investigated. During the first nights in metabolic cages with food deprivation a significant increase in biopterin values was found in rats. This could be diminished either by feeding, adaptation to food deprivation or by oral glucose application. With food deprivation under normal housing conditions, this increase could not be found. Rats that were fed a cellulose preparation without metabolizable energy had no increase in biopterin excretion. The circadian rhythm of biopterin excretion was influenced by food deprivation as well as by cellulose. Alterations in water intake and urinary output had no effect on biopterin levels related to creatinine. Remarkable changes in biopterin excretion are more likely due to hormonal functions and regulations related to stress than to nutritional factors. More investigations into these problems are being performed. Dr. Dietrich Steinkopff Verlag, 1990 B iopterin nationallicence R atte nationallicence G lukose nationallicence C ellulose nationallicence F asten nationallicence b iopterin nationallicence r ats nationallicence glucose nationallicence c ellulose nationallicence f asting nationallicence BH4 : tetrahydrobiopterin nationallicence B : biopterin nationallicence GTP : guanosine triphosphate nationallicence PKU : phenylketonuria nationallicence Koller M. Tierärztliche Fakultät, Institut für Physiologie, Physiologische Chemie und Ernährungsphysiologie, München aut Goldberg M. Tierärztliche Fakultät, Institut für Physiologie, Physiologische Chemie und Ernährungsphysiologie, München aut Schramm G. Tierärztliche Fakultät, Institut für Physiologie, Physiologische Chemie und Ernährungsphysiologie, München aut Merkenschlager M. Tierärztliche Fakultät, Institut für Physiologie, Physiologische Chemie und Ernährungsphysiologie, München aut Zeitschrift für Ernährungswissenschaft Steinkopff-Verlag 29/3(1990-09-01), 169-177 0044-264X 29:3<169 1990 29 394 https://doi.org/10.1007/BF02021555 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02021555 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Koller M. Tierärztliche Fakultät, Institut für Physiologie, Physiologische Chemie und Ernährungsphysiologie, München aut NATIONALLICENCE 700 1- Goldberg M. Tierärztliche Fakultät, Institut für Physiologie, Physiologische Chemie und Ernährungsphysiologie, München aut NATIONALLICENCE 700 1- Schramm G. Tierärztliche Fakultät, Institut für Physiologie, Physiologische Chemie und Ernährungsphysiologie, München aut NATIONALLICENCE 700 1- Merkenschlager M. Tierärztliche Fakultät, Institut für Physiologie, Physiologische Chemie und Ernährungsphysiologie, München aut NATIONALLICENCE 773 0- Zeitschrift für Ernährungswissenschaft Steinkopff-Verlag 29/3(1990-09-01), 169-177 0044-264X 29:3<169 1990 29 394 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer