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Alkan, HF; Vesely, PW; Hackl, H; Foßelteder, J; Schmidt, DR; Vander Heiden, MG; Pichler, M; Hoefler, G; Bogner-Strauss, JG.
Deficiency of malate-aspartate shuttle component SLC25A12 induces pulmonary metastasis.
Cancer Metab. 2020; 8(1):26-26 Doi: 10.1186/s40170-020-00232-7 [OPEN ACCESS]
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Co-Autor*innen der Med Uni Graz
Foßelteder Johannes
Höfler Gerald
Pichler Martin
Vesely Paul

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Aspartate biosynthesis and its delivery to the cytosol can be crucial for tumor growth in vivo. However, the impact of intracellular aspartate levels on metastasis has not been studied. We previously described that loss-of-aspartate glutamate carrier 1 (SLC25A12 or AGC1), an important component of the malate-aspartate shuttle, impairs cytosolic aspartate levels, NAD+/NADH ratio, mitochondrial respiration, and tumor growth. Here, we report the impact of AGC1-knockdown on metastasis. Low AGC1 expression correlates with worse patient prognosis in many cancers. AGC1-knockdown in mouse lung carcinoma and melanoma cell lines leads to increased pulmonary metastasis following subcutaneous or intravenous injections, respectively. On the other hand, conventional in vitro metastasis assays show no indication of increased metastasis capacity of AGC1-knockdown cells. This study highlights that certain branches of metabolism impact tumor growth and tumor metastasis differently. In addition, it also argues that commonly known metastasis indicators, including EMT genes, cell migration, or colony formation, do not always reflect metastatic capacity in vivo.

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Malate-Aspartate Shuttle
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