TY  - JOUR
A1  - Volland, Julian Manuel
A1  - Kaupp, Johannes
A1  - Schmitz, Werner
A1  - Wünsch, Anna Chiara
A1  - Balint, Julia
A1  - Möllmann, Marc
A1  - El-Mesery, Mohamed
A1  - Frackmann, Kyra
A1  - Peter, Leslie
A1  - Hartmann, Stefan
A1  - Kübler, Alexander Christian
A1  - Seher, Axel
T1  - Mass spectrometric metabolic fingerprinting of 2-Deoxy-D-Glucose (2-DG)-induced inhibition of glycolysis and comparative analysis of methionine restriction versus glucose restriction under perfusion culture in the murine L929 model system
JF  - International Journal of Molecular Sciences
N2  - All forms of restriction, from caloric to amino acid to glucose restriction, have been established in recent years as therapeutic options for various diseases, including cancer. However, usually there is no direct comparison between the different restriction forms. Additionally, many cell culture experiments take place under static conditions. In this work, we used a closed perfusion culture in murine L929 cells over a period of 7 days to compare methionine restriction (MetR) and glucose restriction (LowCarb) in the same system and analysed the metabolome by liquid chromatography mass spectrometry (LC-MS). In addition, we analysed the inhibition of glycolysis by 2-deoxy-D-glucose (2-DG) over a period of 72 h. 2-DG induced very fast a low-energy situation by a reduced glycolysis metabolite flow rate resulting in pyruvate, lactate, and ATP depletion. Under perfusion culture, both MetR and LowCarb were established on the metabolic level. Interestingly, over the period of 7 days, the metabolome of MetR and LowCarb showed more similarities than differences. This leads to the conclusion that the conditioned medium, in addition to the different restriction forms, substantially reprogramm the cells on the metabolic level.
KW  - amino acid restriction
KW  - glucose restriction
KW  - mass spectrometry
KW  - low carb
KW  - 2-deoxy-D-glucose
KW  - 2-DG
KW  - methionine
KW  - perfusion culture
KW  - energy restriction
KW  - caloric restriction
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-286007
SN  - 1422-0067
VL  - 23
IS  - 16
ER  - 
TY  - JOUR
A1  - Schmitz, Werner
A1  - Ries, Elena
A1  - Koderer, Corinna
A1  - Völter, Maximilian Friedrich
A1  - Wünsch, Anna Chiara
A1  - El-Mesery, Mohamed
A1  - Frackmann, Kyra
A1  - Kübler, Alexander Christian
A1  - Linz, Christian
A1  - Seher, Axel
T1  - Cysteine restriction in murine L929 fibroblasts as an alternative strategy to methionine restriction in cancer therapy
JF  - International Journal of Molecular Sciences
N2  - Methionine restriction (MetR) is an efficient method of amino acid restriction (AR) in cells and organisms that induces low energy metabolism (LEM) similar to caloric restriction (CR). The implementation of MetR as a therapy for cancer or other diseases is not simple since the elimination of a single amino acid in the diet is difficult. However, the in vivo turnover rate of cysteine is usually higher than the rate of intake through food. For this reason, every cell can enzymatically synthesize cysteine from methionine, which enables the use of specific enzymatic inhibitors. In this work, we analysed the potential of cysteine restriction (CysR) in the murine cell line L929. This study determined metabolic fingerprints using mass spectrometry (LC/MS). The profiles were compared with profiles created in an earlier work under MetR. The study was supplemented by proliferation studies using D-amino acid analogues and inhibitors of intracellular cysteine synthesis. CysR showed a proliferation inhibition potential comparable to that of MetR. However, the metabolic footprints differed significantly and showed that CysR does not induce classic LEM at the metabolic level. Nevertheless, CysR offers great potential as an alternative for decisive interventions in general and tumour metabolism at the metabolic level.
KW  - methionine restriction
KW  - cysteine restriction
KW  - mass spectrometry
KW  - LC/MS
KW  - cancer therapy
KW  - caloric restriction
KW  - homocysteine
KW  - amino acid analogues
KW  - cysteine synthase inhibitor
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-265486
SN  - 1422-0067
VL  - 22
IS  - 21
ER  -