Journal: bioRxiv
Article Title: Overcoming Cisplatin Resistance in 3D Oral Squamous Cell Carcinoma Models via Nanoparticle-Mediated Pt(IV) Drug Delivery
doi: 10.64898/2026.02.22.707247
Figure Lengend Snippet: Cisplatin-responsive primary cell line OSCC43 was grown in two 3D in vitro models for 3 days prior to treatment for 7 days with 10 µM of respective drug combinations, either in free drug formulation or drug-loaded MSNs. Brightfield microscopy was used to capture spheroids ( a ) and BME-embedded organoids ( b ) at beginning of treatment (d0) and at treatment endpoint (d7). ( c , d ) Graph showing spheroid and organoid growth throughout treatment expressed as Log2 of fold change in area at day 7 vs day 3, for OSCC43 spheroids and BME-embedded organoids. mean ± SEM, n = 3. Statistical significance is shown as p-value scores. e ) Representative histograms of flow cytometry analysis of FITC-labeled nanoparticles (MCM41-calc@MSNs, cisPt-ads@MSNs and Pt(IV)-cov@MSNs) within live cells from BME-embedded organoids (BME) and spheroids (SPH) vs an unstained (UNS) control. f ) Representative images of Caspase-3 Immunohistochemistry of treated OSCC43 organoids. Scale bar = 100 µm. g ) Left panel, representative flow cytometry chart illustrating 7-AAD and Annexin V staining of treated OSCC43 cells. g, h ) Graphs showing cell percentage of viable, early and late apoptotic and dead cells from OSCC43 spheroids ( g ) and BME-embedded treated organoids ( h ). mean ± SEM, n = 3, statistical significance is displayed as follows: * = p<0.05; ** = p<0.01; *** = p<0.001; **** = p<0.0001.
Article Snippet: Cells were centrifuged again and resuspended in 1X Binding Buffer for further Annexin V and/or 7AAD staining (Annexin V-FITC Kit #130-092-052, 7-AAD Staining solution #130-111-568, Miltenyi Biotec).
Techniques: In Vitro, Drug Formulation, Microscopy, Flow Cytometry, Labeling, Control, Immunohistochemistry, Staining