Journal: Journal of Advanced Research
Article Title: Tankyrase activity is essential for asymmetric division and chromosome segregation in oocyte meiosis
doi: 10.1016/j.jare.2025.07.008
Figure Lengend Snippet: TNKS regulates BubR1/MPF activity, and Securin accumulation in mouse oocyte. (A) Representative images of BubR1 signals at the kinetochore in oocytes from the control and JW55 treatment groups. Green, BubR1. Red, ACA. Blue, DNA. Bar = 5 μm. (B) The percentage of positive BubR1 signals at the kinetochore in oocytes from the control (n = 53) and JW55 (n = 50) treatment groups. ***, P < 0.001. (C) Representative images of oocytes PB1 extrusion after 12 h culture in the Control, control + Milri, control + 10 μM ETOP, JW55 + 10 μM ETOP and JW55 groups. GV oocytes were exposed to etoposide (ETOP) at concentrations of 1 μM and 10 μM for 30 min in the presence 4 μM milrinone (Milri) to prevent GVBD during this treatment. Bar = 80 μm. (D) The percentage of PB1 or large PB1 extrusion in the control (n = 94), control + Milri (n = 89), control + 1 μM ETOP (n = 98), control + 10 μM ETOP (n = 97), JW55 + 1 μ M ETOP (n = 128), JW55 + 10 μM ETOP (n = 120), and JW55 treatment (n = 114) oocytes after ETOP pretreatment. ns, P > 0.05. **, P < 0.01. ***, P < 0.001. (E) Representative images of γ-H2AX in MI stage oocyte from the control + 10 μM ETOP and JW55 + 10 μM ETOP oocytes. Red, γ-H2AX. Blue, DNA. Bar = 5 μm. (F) Relative intensity of γ-H2AX in MI stage oocyte from the control + 10 μM ETOP (n = 47) and JW55 + 10 μM ETOP (n = 39) oocytes. ***, P < 0.001. (G) Western blot of Cyclin B1 and Securin in oocytes from the control and JW55 treatment groups after 6 h of culture. (H) Western blot of pT161-CDK1 and CDC20 in oocytes from the control and JW55 treatment groups after 6 h of culture, and band intensity analysis of their protein levels in oocytes from the control and JW55 treatment groups. *, P < 0.05. **, P < 0.01. (I) Band intensity analysis of pT161-CDK1, pY15-CDK1, and Securin in oocytes from the control and JW55 treatment groups after 3 h of culture. ns, P > 0.05. *, P < 0.05. (J) Band intensity analysis of CDC25C, Cyclin B1, and pT14-CDK1 in oocytes from the control and JW55 treatment groups after 3 h of culture. *, P < 0.05. **, P < 0.01. (K) Protein-protein interaction network analysis of cell cycle-related proteins identified by mass spectrometry and MPF/Securin/CDC20/CDC25C upon STRING database. Different node color indicated core and non-core nodes, while edge thickness edge represented interaction strength. (L) Co-IP analysis with an anti-TNKS antibody. The immunoblot was probed with anti-CDC20 and anti-CDC25C antibodies. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
Article Snippet: JW55 (HY-13968), XAV939 (HY-15147), and IWR-1 (HY-12238) was from MedChemExpress.
Techniques: Activity Assay, Control, Western Blot, Mass Spectrometry, Co-Immunoprecipitation Assay