Chronic dietary supplementation with kynurenic acid, a neuroactive metabolite of tryptophan, decreased body weight without negative influence on densitometry and mandibular bone biomechanical endurance in young rats.

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ID: 68588
2019
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Abstract
Kynurenic acid (KYNA) is a neuroactive metabolite of tryptophan. KYNA naturally occurs in breast milk and its content increases with lactation, indicating the role of neonatal nutrition in general growth with long-term health effects. KYNA is also an antagonist of ionotropic glutamate receptors expressed in bone cells. The aim of this study was to establish the effects of chronic KYNA supplementation on bone homeostasis in young rats, using mandible as a model bone. Female and male newborn Wistar rats were divided into control and KYNA-administered groups until 60 days of age (25x101 mg/L or 25x102 mg/L in drinking water). Hemimandibles were subjected to densitometry, computed tomography analysis and mechanical testing. Rats supplemented with KYNA at both doses showed a decrease in body weight. There were no effects of KYNA administration and mandible histomorphometry. In males, a significant quadratic effect (P < 0.001) was observed in the densitometry of the hemimandible, where BMD increased in the group supplemented with 2.5x101 mg/L of KYNA. Analysis of mechanical tests data showed that when fracture forces were corrected for bone geometry and rats body weight the improvement of bone material properties was observed in male and female rats supplemented with lower dose of KYNA. This study showed that chronic supplementation with KYNA may limit weight gain in the young, without adversely affecting the development of the skeleton.
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tomaszewska2019chronicplos Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Tomaszewska, Ewa;Muszyński, Siemowit;Kuc, Damian;Dobrowolski, Piotr;Lamorski, Krzysztof;Smolińska, Katarzyna;Donaldson, Janine;Świetlicka, Izabela;Mielnik-Błaszczak, Maria;Paluszkiewicz, Piotr;Parada-Turska, Jolanta;
Journal PloS one
Year 2019
DOI
10.1371/journal.pone.0226205
URL
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