Journal: bioRxiv

Article Title: Mutant p53 Directs PARP to Regulate Replication Stress and Drive Breast Cancer Metastasis

doi: 10.64898/2026.03.26.713220

Figure Lengend Snippet: (A) Top: Schematic of DNA fiber combing assay with CldU/IdU pulse-labeling protocol and treatment with PARGi, followed by S1 nuclease treatment. Bottom: Representative DNA fiber images of MDA-MB-468 cells with mtp53 R273H, and mtp53 (R273HΔ347-393 with vehicle (DMSO) or PARGi with or without S1 nuclease treatment. (B) Quantification of IdU tracts after 10 μM PARGi treatment with or without S1 nuclease. Each dot represents one fiber. Around 130-220 fibers were analyzed for each condition. Mean values are represented by horizontal lines. ns., not significant *P < 0.05, **P < 0.01, ***P <0.001, ****P < 0.0001, two-way ANOVA test followed by Tukey’s post-hoc test. Representative of two independent experiments. (C) Whole cell protein levels of PAR, mtp53, γ-H2AX, RPA32, Phos-Chk2, Chk2 and MDMX were determined by Western blot analysis. Representative of two independent experiments. (D) Model for mutant p53-PARP axis enables replication stress tolerance and drive cancer metastasis, created in BioRender.

Article Snippet: Poly(ADP-ribose) glycohydrolase (PARG) inhibitor was purchased from MedChemExpress (MCE) (Cat# HY-133531).

Techniques: Labeling, Western Blot, Mutagenesis

Journal: Experimental and Therapeutic Medicine

Article Title: Myrrh ameliorates endometriosis by enhancing ER stress-related apoptotic cell death

doi: 10.3892/etm.2026.13080

Figure Lengend Snippet: Myrrh reduces the growth of human endometriotic cells by activating apoptotic signaling pathways. Endometriotic cells (12Z) and normal endometrial cells (T-HESC) were treated with the indicated concentrations of myrrh. (A) Cell viability was analyzed by measuring at 450 nm wavelength using MTT after 24 h. (B) To assess apoptotic or dead cell populations, 12Z cells were treated with increasing doses of myrrh for 24 h, and the percentages of Annexin V-positive and PI-positive cells were measured (Annexin V: Ex 494/Em 525 nm; PI: Ex 535/Em 617 nm). After 24 h of treatment with each concentration of myrrh, mitochondria-associated apoptotic proteins were analyzed by immunoblotting. (C) Representatives immunoblot images of Bax and Bcl-2 are shown. (D) A major monomeric Bax band at ~21 kDa (monomer Bax) and higher-molecular-weight bands corresponding to oligomeric forms (tetramer Bax, ~84 kDa) are indicated. (E) Representative immunoblot images of caspase-3, caspase-9 and PARP are shown. GAPDH was used as an internal control. (F) Densitometric analysis of protein levels. Data are expressed as relative intensity compared to control. Data are expressed as mean ± standard error of the mean. Statistical analysis was performed using one-way ANOVA followed by Tukey's post hoc test. * P<0.05, ** P<0.01 and *** P<0.001. Ex, excitation; Em, emission; ; PARP, poly(ADP-ribose) polymerase.

Article Snippet: Subsequently. the membranes were subjected to overnight incubated at 4 ̊C with primary antibodies, including anti-human poly (ADP-ribose) polymerase (PARP, #9542s; Cell Signaling Technology, Inc.), caspases-3 (#9665s; Cell Signaling Technology, Inc.), caspase-9 (#9508s; Cell Signaling Technology, Inc.), Bax (NB100-56095; Novus Biologicals), Bcl-2 (NB100-56098; Novus Biologicals), p53 (sc-6243; Santa Cruz Biotechnology, Inc.) and glyceraldehyde 3-phosphate dehydrogenase (GAPDH, sc-32233; Santa Cruz Biotechnology, Inc.).

Techniques: Protein-Protein interactions, Concentration Assay, Western Blot, Molecular Weight, Control

Journal: Experimental and Therapeutic Medicine

Article Title: Myrrh ameliorates endometriosis by enhancing ER stress-related apoptotic cell death

doi: 10.3892/etm.2026.13080

Figure Lengend Snippet: Mechanism of action of myrrh in endometriosis. (A) 12Z were treated with the indicated concentrations of myrrh and TUDCA (200 µM). Cell viability was analyzed using MTT after 24 h, measured at a wavelength of 450 nm. (B) Schematic representation summarizing the experimental results and the potential mechanism by which myrrh exerts palliative effects on endometriosis. *** P<0.001. TUDCA, tauroursodeoxycholic acid; ATF6, activating transcription factor 6; IRE1α, inositol-requiring enzyme 1 alpha; ATF4, activating transcription factor 4; CHOP, C/EBP homologous protein; GADD34, growth arrest and DNA damage-inducible protein 34; Bax, Bcl-2-associated X protein; Bcl2, B-cell lymphoma 2; Caspase 3, cysteine-aspartic acid protease 3; Caspase 9, cysteine-aspartic acid protease 9; PARP, poly(ADP-ribose) polymerase.

Article Snippet: Subsequently. the membranes were subjected to overnight incubated at 4 ̊C with primary antibodies, including anti-human poly (ADP-ribose) polymerase (PARP, #9542s; Cell Signaling Technology, Inc.), caspases-3 (#9665s; Cell Signaling Technology, Inc.), caspase-9 (#9508s; Cell Signaling Technology, Inc.), Bax (NB100-56095; Novus Biologicals), Bcl-2 (NB100-56098; Novus Biologicals), p53 (sc-6243; Santa Cruz Biotechnology, Inc.) and glyceraldehyde 3-phosphate dehydrogenase (GAPDH, sc-32233; Santa Cruz Biotechnology, Inc.).

Techniques: