Forskningsoutput per år
Forskningsoutput per år
K. Barbara Sahlin, Indira Pla, Jéssica de Siqueira Guedes, Krzysztof Pawłowski, Roger Appelqvist, György Marko-Varga, Gilberto Barbosa Domont, Fábio César Sousa Nogueira, Aleksander Giwercman, Aniel Sanchez, Johan Malm
Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review
Long term effect of testosterone (T) deficiency impairs metabolism and is associated with muscle degradation and metabolic disease. The association seems to have a bidirectional nature and is not well understood. The present study aims to investigate the early and unidirectional metabolic effect of induced T changes by measuring fasting amino acid (AA) levels in a human model, in which short-term T alterations were induced. We designed a human model of 30 healthy young males with pharmacologically induced T changes, which resulted in three time points for blood collection: (A) baseline, (B) low T (3 weeks post administration of gonadotropin releasing hormone antagonist) and (C) restored T (2 weeks after injection of T undecanoate). The influence of T on AAs was analyzed by spectrophotometry on plasma samples. Levels of 9 out of 23 AAs, of which 7 were essential AAs, were significantly increased at low T and are restored upon T supplementation. Levels of tyrosine and phenylalanine were most strongly associated to T changes. Short-term effect of T changes suggests an increased protein breakdown that is restored upon T supplementation. Fasting AA levels are able to monitor the early metabolic changes induced by the T fluctuations.
Originalspråk | engelska |
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Artikelnummer | 1276 |
Tidskrift | Life |
Volym | 11 |
Utgåva | 11 |
DOI | |
Status | Published - 2021 nov. |
Forskningsoutput: Avhandling › Doktorsavhandling (sammanläggning)