Journal: Cell Death and Differentiation
Article Title: Epigenetic regulation of HOXA2 expression affects tumor progression and predicts breast cancer patient survival
doi: 10.1038/s41418-024-01430-2
Figure Lengend Snippet: ( a ) Bubble plots showing the significant positive correlation values (R∈[0;1], p-value ≤ 0.05) between the expression of the three selected genes ( HOXA2 , CIDEC and PPARγ) in breast non-tumor/normal and cancer tissues from our cohort (left graph) and from TCGA dataset (right graph). Bubble color (from light to dark blue) indicates the strength (R value) of the correlation. Of note, a strong correlation is in dark blue and corresponds to a R = 1, while a weak correlation is in light blue and corresponds to a R = 0. Bubble size indicates the significance (p-value) of the correlation; bigger is the size of the bubble, lower is the p-value. ( b, c ) The mRNA expression of CIDEC ( b ) and of PPARγ ( c ) was measured in hTERT-HME1 cells wild type (WT) or knockout ( HOXA KO ) for HOXA2 by RT-qPCR. GAPDH was used as endogenous control. ( d, e ) Western blot analysis of the expression of CIDEC and PPARγ in WT and HOXA2 KO cells ( d ) and in WT and HOXA2 KO cells transfected with HOXA2 plasmid (pHOXA2) or the control vector (pCMV) ( e ). Antibodies for Flag ( e ) or β-actin ( d, e ) were employed as control of overexpression of HOXA2 or as loading control, respectively. Experimental workflow employed for lipid droplet tracing ( f ) ( f ; created with BioRender.com). Confocal microscopy images (scale bar equals 10 μm) ( g ) and quantification of the number ( h ) of intracellular lipid droplets (LDs) normalized to cell area and expressed as fold change (FC) to control in hTERT-HME1 WT and HOXA2 KO cells with (+pHOXA2) or without (−pHOXA2) restoration of HOXA2 expression. LDs were stained with BODIPY 493/503 (green), and nuclei were stained with Hoechst (blue). b – e , h Data are presented as mean of ± SD from one representative experiment and analyzed with Student’s t -test or ANOVA. FC fold change; hTERT_WT hTERT-HME1 wild type cells; hTERT_HOXA2 KO hTERT-HME1 HOXA2 knockout cells; RT-qPCR reverse-transcription quantitative real time PCR.
Article Snippet: Then, 100 ng of cDNA were amplified with specific Taqman probes ( HOXA2: Hs00534579_m1, PPARG: Hs01115513_m1, CIDEC : Hs01032998_m1, all from Thermo Fisher Scientific) carrying out the qPCR on the StepOne TM Real-time PCR system (Thermo Fisher Scientific) using TaqMan Fast Advanced Master Mix (Applied Biosystems TM ), according to the manufacturer’s instructions.
Techniques: Expressing, Knock-Out, Quantitative RT-PCR, Control, Western Blot, Transfection, Plasmid Preparation, Over Expression, Confocal Microscopy, Staining, Reverse Transcription, Real-time Polymerase Chain Reaction