Journal: PLoS ONE

Article Title: Chondroitin Sulfate Proteoglycan CSPG4 as a Novel Hypoxia-Sensitive Marker in Pancreatic Tumors

doi: 10.1371/journal.pone.0100178

Figure Lengend Snippet: Immunoblotting confirmed the specificity of polyclonal H-300 ( A ) and monoclonal LHM2 antibodies ( B ), generated against recombinant protein and melanoma-derived antigens, respectively. The images demonstrate differences in size between pancreatic (band-2) and melanoma (SK-MEL-28, band-1) antigens, but not cervical carcinoma (HeLa) antigens ( C ), and reveal the frequent existence of oversized isoforms in SCA and PDAC (band 3, C–D ). GAPDH was used as the loading control. HiMark (Invitrogen) was used as the molecular weight marker. ( E ) Western blot and ( F ) FACS analyses of CSPG4 siRNA-transfected Panc1 cells further confirmed the specificity of the used antibodies and established the knockdown efficacy of the two siRNA sets (si1 and si2) at approximately 75% after 48 h post transfection, compared to the negative control siRNA (neg.si). QRT-PCR confirmed the efficacy of the knockdowns at the mRNA level.

Article Snippet: The USCN/Cloud-Clone kit employed a recombinant N-terminal fragment of a protein (Leu16-Ser350) as an ELISA standard and immunogen to produce mouse monoclonal (capture) and goat polyclonal (detection) antibodies; CUSABIO - a full-length protein expressed in eukaryotic cells.

Techniques: Western Blot, Generated, Recombinant, Derivative Assay, Control, Molecular Weight, Marker, Transfection, Knockdown, Negative Control, Quantitative RT-PCR

Journal: Frontiers in Genetics

Article Title: Assembly factor for spindle microtubules ( ASPM ) promotes osimertinib resistance in lung cancer by increasing EGFR stability

doi: 10.3389/fgene.2025.1593314

Figure Lengend Snippet: ASPM enhances EGFR resistance in lung cancer cells. (A) Dose‒effect relationship curves of osimertinib for PC-9 cells; (B) Dose‒effect relationship curves of osimertinib for PC-9 OR cells. (C) mRNA expression levels of ASPM and EGFR in PC-9 and PC-9 OR cells. (D) Protein expression of ASPM and EGFR in PC-9 and PC-9 OR cells. The histogram represents the relative gray values of the intracellular EGFR and ASPM proteins, and the data are presented as the means ± standard deviations (means ± SDs, n = 3 fields). (E) Silencing of the ASPM gene and mRNA expression levels of ASPM in PC-9 and PC-9 OR cells. (F) Dose‒effect relationship curves of osimertinib in PC-9 si ASPM cells. (G) Dose‒effect relationship curves of osimertinib in PC-9 OR si ASPM cells. (H) mRNA expression levels of ASPM were detected in PC-9 cells after overexpressing the ASPM gene. (I) Dose‒effect curves of osimertinib after PC-9 overexpression of ASPM . (J) The viability of the cells in each group was assessed via a CCK-8 assay. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001.

Article Snippet: The membrane was blocked with 5% skim milk for 60 min and incubated with primary antibodies, including ASPM (Proteintech, 26223-1-AP) (1:600) and EGFR (Cusabio, CSB-PA005571LA01HU) (1:1000), overnight at 4 °C, followed by 2 h of incubation with HRP-conjugated goat anti-rabbit (Proteintech, SA00001-2) (1:2000) at room temperature.

Techniques: Expressing, Over Expression, CCK-8 Assay

Journal: Frontiers in Genetics

Article Title: Assembly factor for spindle microtubules ( ASPM ) promotes osimertinib resistance in lung cancer by increasing EGFR stability

doi: 10.3389/fgene.2025.1593314

Figure Lengend Snippet: ASPM plays a key role in the stabilization of drug-resistant cell lines. (A) Scatter plot of the correlation between ASPM and EGFR expression; p < 0.05. (B) Silencing of ASPM followed by ASPM and EGFR mRNA expression. (C) Protein expression of EGFR after silencing ASPM. (D) CHX administration at various time points. The right panel represents the relative gray values of the intracellular EGFR proteins, and the data are presented as the means ± standard deviations (means ± SDs, n = 3 fields). (E) IF images of PC-9 and PC-9 OR cells incubated with primary antibodies against EGFR (red) and ASPM (green). Detection was performed using secondary antibodies coupled to Alexa Fluor 488 and Alexa Fluor 555. The cell nuclei were stained with DAPI (blue), Scale = 7.5 μm. (F) mRNA expression levels of ASPM in PC-9 OR cells after silencing of ASPM -2. (G) PC-9 OR cells in the NC group/si ASPM -2 group were stained with propidium iodide (PI), and the DNA content was detected via flow cytometry. The red color represents the theoretical curve that we fit via ModFit software on the basis of the DNA content distribution data of the cells. (H) Statistics of the flow cytometric results in H plots. n = 3, a p value <0.05 was considered statistically significant, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001.

Article Snippet: The membrane was blocked with 5% skim milk for 60 min and incubated with primary antibodies, including ASPM (Proteintech, 26223-1-AP) (1:600) and EGFR (Cusabio, CSB-PA005571LA01HU) (1:1000), overnight at 4 °C, followed by 2 h of incubation with HRP-conjugated goat anti-rabbit (Proteintech, SA00001-2) (1:2000) at room temperature.

Techniques: Expressing, Incubation, Staining, Flow Cytometry, Software

Journal: Frontiers in Genetics

Article Title: Assembly factor for spindle microtubules ( ASPM ) promotes osimertinib resistance in lung cancer by increasing EGFR stability

doi: 10.3389/fgene.2025.1593314

Figure Lengend Snippet: ASPM is significantly upregulated in NSCLC tumor tissues and strongly associated with reduced patient survival. ASPM silencing attenuates PC-9 and PC-9 OR malignant phenotypes, including proliferation and invasion, and sensitizes resistant cells to osimertinib. In addition, inhibiting the expression of ASPM effectively reduces damage to the cell cycle and protein stability of drug-resistant cells, thereby restoring the expression and function of EGFR.

Article Snippet: The membrane was blocked with 5% skim milk for 60 min and incubated with primary antibodies, including ASPM (Proteintech, 26223-1-AP) (1:600) and EGFR (Cusabio, CSB-PA005571LA01HU) (1:1000), overnight at 4 °C, followed by 2 h of incubation with HRP-conjugated goat anti-rabbit (Proteintech, SA00001-2) (1:2000) at room temperature.

Techniques: Expressing