ZFIN Image: Xiong et al., 2021, Fig. 3

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Figure Caption

Fig. 3

Increased glutamine uptake mediated by SLC1A1 enhanced glutathione metabolic flux.

(a) SLC1A1 mRNA expression (left panel) and cellular glutamine levels (right panel) in NK-92 cells transfected with SLC1A1 vector or control vector. The control vector values of SLC1A1 mRNA expression were normalized to 1.

(b) Relative abundance (left panel) and isotope-labeled fraction (right panel) of glutamine in NK-92 cells transfected with SLC1A1 vector or control vector.

(c) Heatmaps of isotope-labeled metabolites significantly altered in NK-92 cells transfected with SLC1A1 vector, comparing with control vector. The aberrant metabolites were enriched into the KEGG pathways indicated at left: hsa00471, D-glutamine and D-glutamate metabolism; hsa00250, alanine, aspartate and glutamate metabolism; hsa00480, glutathione metabolism.

(d and e) The isotope-labeled fraction (d) and relative abundance (e) of aspartate, asparagine, GSH, and GSSG in NK-92 cells transfected with SLC1A1 vector or control vector.

(f) A schematic to show the metabolic flux of isotope-labeled glutamine.

Assays in (a, right panel) were set up in 6 replications. Assays in (b), (d) and (e) were set up in triplicate. Data in (a), (b), (d) and (e) were represented as mean ±SD. P values in (a), (b), (d) and (d) were calculated with unpaired t-test.

Acknowledgments

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