Journal: Frontiers in Neurology
Article Title: Transcriptome and Proteome Analysis in LUHMES Cells Overexpressing Alpha-Synuclein
doi: 10.3389/fneur.2022.787059
Figure Lengend Snippet: Western blots confirmation. Western blots with antibodies against the 21 proteins that were differentially regulated in the proteomics, of which the corresponding genes were also differentially regulated. For the Western blot investigation, samples from untransduced cells (untr), αSyn-overexpressing cells (αSyn), and GFP-expressing cells (GFP) cells were used. The proteins are presented in the same order as in . (A) SNCA, synuclein alpha; (B) SCG2, Secretogranin II; (C) MTHFD2, methylenetetrahydrofolate dehydrogenase (NADP+ dependent) 2, methenyltetrahydrofolate; (D) SHMT2, serine hydroxymethyltransferase 2; (E) WARS1, tryptophanyl-tRNA synthetase 1; (F) PSAT1, phosphoserine aminotransferase 1; (G) TFRC, transferrin receptor; (H) SERPINB6, serpin Family B, Member 6; (I) ASNS, asparagine synthetase (glutamine-hydrolyzing); (J) ARHGEF2, Rho/Rac guanine nucleotide exchange Factor 2; (K) SLC7A1, solute carrier Family 7, Member 1; (L) EDF1, endothelial differentiation-related Factor 1; (M) SCARB2, scavenger receptor Class B, Member 2; (N) CNTN2, contactin 2; (O) MDGA1, MAM domain containing glycosylphosphatidylinositol Anchor 1; (P) NCALD, neurocalcin delta; (Q) ADD1, Adducin 1; (R) STXBP1, syntaxin-binding Protein 1; (S) ALDH6A1, aldehyde dehydrogenase 6 Family, Member A1; (T) : LHX9, LIM Homeobox 9; (U) DLG4, discs large MAGUK scaffold Protein 4. Twenty out of 21 proteins (A–S,U) were differentially regulated between αSyn-overexpressing cells and GFP-expressing cells in the same direction as in the LC-MS investigation and thereby confirming these findings. With the exception of TFRC (G) , ADD1 (Q) , ALDH6A1 (S) , and DLG4 (U) , there was no difference in protein levels between untransduced cells and GFP-expressing cells, suggesting an αSyn-specific effect of the protein regulation. One protein (LHX9, T ) could not be confirmed. * p < 0.05, ** p < 0.01, *** p < 0.001 vs. untransduced cells. § p < 0.05, §§ p < 0.01, §§§ p < 0.001 vs. GFP transduced cells.
Article Snippet: For visualization of the proteins, the following primary antibodies were used: rabbit anti-ADD1 (1:500; Abcam, Cambridge United Kingdom), rabbit anti-ALDH6A1 (1:3,000; Proteintech, Rosemont, IL, USA), rabbit anti-ARHGEF2 (1:1,000; Cell Signaling Technology, Inc., Danvers, MA, USA), rabbit anti-ASNS (1:500; Proteintech), rabbit anti-αSyn (1:500; Thermo Fisher Scientific), goat anti-CNTN2 [1 μg/ml (R&D Systems, Minneapolis, MN, USA)], mouse anti-DLG4/PSD95 (1:500; Synaptic Systems, Göttingen, Germany), rabbit anti-EDF1 (1:500; Proteintech), mouse anti-LHX9 (1:500; Santa Cruz Biotechnology, Dallas, TX, USA), sheep anti-MDGA1 (0.1 μg/ml; R&D Systems), rabbit anti MTHFD2 (1:500; Proteintech), rabbit anti-NCALD (1:1,000; Proteintech), rabbit anti-PSAT1 (1:1,000; Proteintech), rabbit anti-SCARB2/LIMP2 (1:1,000; Novus Biologicals; Littleton, CO, USA), rabbit anti-SCG2 (1:1,000; Abcam), rabbit anti-SERPINB6 (1:500; Proteintech), rabbit anti-SHMT2 (1:1,000; Proteintech), rabbit anti-SLC7A1 (1:500; Proteintech), rabbit anti-STXBP1 (1:1,000; Synaptic Systems), mouse anti-TFRC (1:1,000; Thermo Fisher Scientific), rabbit anti-WARS1 (1:500; Thermo Fisher Scientific).
Techniques: Western Blot, Expressing, Binding Assay, Liquid Chromatography with Mass Spectroscopy