Journal: Bioactive Materials
Article Title: Dental pulp stem cells alleviate Schwann cell pyroptosis via mitochondrial transfer to enhance facial nerve regeneration
doi: 10.1016/j.bioactmat.2025.01.031
Figure Lengend Snippet: TNFα enhances mitochondrial adaptive stress response in DPSCs, promoting mitochondrial protection against pyroptosis-induced damage in Schwann cells. A. Flow cytometry analysis of mitochondrial ROS levels in unstained DPSCs, DMSO-treated DPSCs, and TNFα (20 ng/mL)-treated DPSCs. B. Quantification of relative fluorescence intensity from (A) (n = 3). C. Flow cytometry analysis of mitochondrial membrane potential in unstained DPSCs, DMSO-treated DPSCs, and TNFα (20 ng/mL)-treated DPSCs. D. Quantification of relative fluorescence intensity from (C) (n = 3). E. ATP levels in DMSO-treated DPSCs and TNFα (20 ng/mL)-treated DPSCs (n = 3). F. WB analysis of PGC1a, NRF1, TFAM, COX4, TOM20, and β-actin as a loading control in DMSO-treated DPSCs, TNFα (20 ng/mL)-treated DPSCs, and metformin (Met, 1 nM)-treated DPSCs. G. Quantification of protein expression levels from (F) (n = 3). H. Quantitative Polymerase Chain Reaction (qPCR) analysis of Ppargc1a , Nrf1 , Tfam , mt-Co2 , Cox4i1 , and Tomm20 expression levels in DMSO-treated DPSCs and TNFα (20 ng/mL)-treated DPSCs (n = 3). I. qPCR analysis of CAT and SOD1 expression levels (n = 3). J. qPCR analysis of Pink1 and Prkn expression levels in DMSO-treated DPSCs and TNFα (20 ng/mL)-treated DPSCs (n = 3). K. WB analysis of CAT, SOD1, Parkin, and β-actin as a loading control in DMSO-treated DPSCs, TNFα (20 ng/mL)-treated DPSCs, and metformin (Met, 1 nM)-treated DPSCs. L. Quantification of protein expression levels from (K) (n = 3). M. Flow cytometry analysis of mitochondrial ROS levels in LA-RSC96 cells, and LA-RSC96 cells co-cultured with DPSCs or TNFα (20 ng/mL)-treated DPSCs. N. Quantification of relative fluorescence intensity from (M) (n = 3). O. Flow cytometry analysis of mitochondrial membrane potential in LA-RSC96 cells, and LA-RSC96 cells co-cultured with DPSCs or TNFα (20 ng/mL)-treated DPSCs. P. Quantification of relative fluorescence intensity from (O) (n = 3). Q. ATP levels in RSC96, LA-RSC96, and LA-RSC96 cells co-cultured with DPSCs or TNFα (20 ng/mL)-treated DPSCs (n = 5). R. WB analysis of NLRP3, GSDMD, pro- and cleaved-Caspase-1, pro- and cleaved-IL1β, TOM20, and β-actin as a loading control in LA-RSC96, and LA-RSC96 cells co-cultured with DPSCs or TNFα (20 ng/mL)-treated DPSCs. S. Quantification of protein expression levels from (R) (n = 3). T. qPCR analysis of IL6 , Cxcl10 , and Tnf expression levels in LA-RSC96, and LA-RSC96 cells co-cultured with DPSCs or TNFα (20 ng/mL)-treated DPSCs (n = 3). U. Caspase-1 activity assay in RSC96, LA-RSC96, and LA-RSC96 cells co-cultured with DPSCs or TNFα (20 ng/mL)-treated DPSCs (n = 5). Data are mean ± SD. ∗ p < 0.05, ∗∗ p < 0.01, ∗∗∗ p < 0.001; ns, not significant.
Article Snippet: For TNFα or Metformin preconditioning, DPSCs were treated with human TNFα (HY-P70426A, MCE) or Metformin (HY-B0627, MCE) for 24 h. Fluorescence-activated cell sorting (FACS) was performed using a FACSAria III cell sorter (BD Biosciences) to isolate RSC96 cells from the co-culture systems.
Techniques: Flow Cytometry, Fluorescence, Membrane, Control, Expressing, Real-time Polymerase Chain Reaction, Cell Culture, Activity Assay