Journal: bioRxiv

Article Title: Wnts are endothelial cell-derived PKD1/PKD2-dependent autocrine/paracrine vasodilators

doi: 10.64898/2026.03.17.712518

Figure Lengend Snippet: (A) Representative RT-PCR showing that mRNA for PKD1 is present in isolated endothelial cells from tamoxifen-treated Pkd1 fl/fl but absent in isolated endothelial cells from tamoxifen-treated Pkd1 fl/fl :Cdh5(PAC)-CreERT2 mice. Representative of 5 independent experiments for each genotype. (B) Representative Western blots illustrating PKD1, PKD2, AT1, eNOS, Fzd-7 and actin proteins in mesenteric arteries of Pkd1 fl/fl and Pkd1 ecKO mice. (C) Mean data from experiments shown in panel B. Significance was assessed using Student t-tests, n=5 independent mesenteric arterial lysates for each genotype and each protein. (D) Immunofluorescence images (representative of three mesenteric arteries from three mice for each genotype) illustrating that PKD1 (Alexa Fluor 546) is abolished in endothelial cells of en face mesenteric arteries from Pkd1 ecKO mice. CD31 (Alexa Fluor 488) and DAPI are also shown. Scale bars, 50 μm. (E) Diameter responses to intravascular flow (10 dyn/cm 2 ) and intravascular Wnt9b (3 μg/ml) applied in continuous flow in pressurized (80 mmHg) mesenteric arteries from Pkd1 fl/fl and Pkd1 ecKO mice. (F) Diameter responses to intravascular flow (10 dyn/cm 2 ) and intravascular boiled Wnt9b (3 µg/ml) applied under continuous flow (10 dyn/cm 2 ) in pressurized (80 mmHg) mesenteric arteries from Pkd1 fl/fl and Pkd1 ecKO mice. (G) Mean data from experiments shown in panels E and F, and the modulation of flow and Wnt9b-mediated vasodilation by SRI37892 (Fzd-7 Inh, 5 µM). Significance was assessed using a two-way ANOVA with Holm-Sidak post hoc multiple comparisons test. n=10 arteries from 7 mice of each genotype for flow, flow+ Wnt9b and Wnt9b. n=7 arteries from 5 mice for Fzd-7 Inh+flow and Fzd-7 Inh+flow+Wnt9b. n=5 arteries from 5 mice for each genotype for flow + boiled Wnt9b. (H) Diameter responses to intravascular flow (10 dyn/cm 2 ) and intravascular Wnt5a (3 µg/ml). (I) Diameter responses to intravascular flow (10 dyn/cm 2 ) and intravascular boiled Wnt5a (3 µg/ml). (J) Mean data from experiments shown in panels H and I and the modulation of flow and Wnt5a-induced vasodilation by SRI37892 (Fzd-7 Inh, 5 μM). Significance was assessed using two-way ANOVA with Holm-Sidak post hoc multiple comparisons test. n=8 arteries from 6 mice from Pkd1 fl/fl for flow, flow+ Wnt5a. n=5 arteries from 5 mice from Pkd1 ecKO for flow, flow+ Wnt5a. n=5 arteries from 5 mice of each genotype for flow + boiled Wnt5a. n=8 arteries from 6 mice from Pkd1 fl/fl for flow+ Fzd-7 Inh and flow+ Wnt5a+ Fzd-7 Inh.

Article Snippet: Membranes were blocked with 5% milk or 5% BSA and incubated with one of the following primary antibodies: PKD1 (Polycystic Kidney Disease Research Resource Consortium, Baltimore), PKD2 (Alomone), eNOS (Abcam), p-eNOS (Cell Signaling), Wnt9b (R&D Systems), Wnt5a (R&D Systems), AT1 receptor (Alomone) or actin (Cell Signaling) overnight at 4°C.

Techniques: Reverse Transcription Polymerase Chain Reaction, Isolation, Western Blot, Immunofluorescence

Journal: Cancers

Article Title: SHARPIN Enhances Ferroptosis in Synovial Sarcoma Cells via NF-κB- and PRMT5-Mediated PGC1α Reduction.

doi: 10.3390/cancers15133484

Figure Lengend Snippet: Figure 4. SHARPIN enhances the sensitivity of synovial sarcoma cell lines to ferroptosis via the PGC1α/SLC7A11 axis. (A–D) Viability assays of Aska (A,B) and Yamato (C,D) cells expressing scrambled or SHARPIN-specific shRNAs and treated with the indicated concentration of RSL3 (A,C) or erastin (B,D) for 24 h. (E) Immunoblot analyses of the effects of knockdown of SHARPIN on the expression levels of PGC1α, SLC7A11, SHARPIN, complex I, III, V, VDAC1/3, Parkin, BNIP3L/NIX, and LC3B in Yamato and Aska cells. (F) A qPCR analysis of the effect of transient SMART- pool siRNA-mediated knockdown of SHARPIN on SLC7A11 mRNA expression in Yamato cells. (G) Immunoblot analyses of the effects of knockdown of SHARPIN on the expression levels of NRF2 in Yamato cells. (H) Complex I activity in Yamato cells expressing scrambled or SHARPIN-specific shRNAs. Cells were seeded in identical numbers and incubated overnight. Signal intensity was then measured at the indicated time points. (I) ROS assay of Yamato cells expressing scrambled or SHARPIN-specific shRNAs. The cells were treated with or without 0.01 µM RSL3 for 24 h prior to the measurement of ROS activity. (J) GSH/GSSG ratio assay of Yamato cells expressing scrambled or SHARPIN-specific shRNAs. (K) Analysis of the relationship between SHARPIN mRNA expression levels and the GPX4 dependency of a bone and soft tissue sarcoma cohort using Chronos, a dynamic model of CRISPR data (CCLE database). The population below the first quantile (n = 18) was regarded as the low group, the population between the first and third quantile (n = 33) was regarded as the middle group, and the population above the third quantile (n = 18) was regarded as the high group. (A–D,F) Quantitative data are presented as the mean ± SD (n = 3). (K) A box-and-whisker plot is shown. (A–D,I,J) Statistical significance was calculated using one- or two-way ANOVA. * p < 0.05; ** p < 0.005; *** p < 0.0005; NS, not significant. (F) Statistical significance was calculated using a

Article Snippet: Antibodies targeting the following proteins were used: TFRC (ab214039, Abcam, Cambridge, UK), FPN (NBP1-21502, Novus Biologicals, Englewood, CO, USA), FTH1 (ab65080, Abcam), SLC7A11 (600-401-GU3, Rockland Immunochemicals, Pottstown, PA, USA), GPX4 (ab125066, Abcam), GAPDH (sc-32233, Santa Cruz Biotechnology, Dallas, TX, USA), PGC1α (NBP1-04676, Novus Biologicals), SHARPIN (ABF128, Millipore, Burlington, MA, USA), β-actin (#4970, Cell Signaling Technology, Danvers, MA, USA), VDAC1/3 (ab14734, Abcam), PRMT5 (sc-376937, Santa Cruz Biotechnology), SDMA (SYM10; 07- 412, Millipore), SOX10 (sc-365692, Santa Cruz Biotechnology), MITF (ab12039, Abcam), LC3B (NB100-2220, Novus Biologicals), NRF2 (#12721, Cell Signaling Technology), Parkin (#4211, Cell Signaling Technology), and BNIP3L/NIX (#12396, Cell Signaling Technology).

Techniques: Expressing, Concentration Assay, Western Blot, Knockdown, Activity Assay, Incubation, ROS Assay, CRISPR, Whisker Assay

Journal: Cancers

Article Title: SHARPIN Enhances Ferroptosis in Synovial Sarcoma Cells via NF-κB- and PRMT5-Mediated PGC1α Reduction.

doi: 10.3390/cancers15133484

Figure Lengend Snippet: Figure 5. Aberrant PGC1α expression overwhelms the regulatory effect of SHARPIN inhibition on ferroptosis in CCS. (A) A qPCR analysis of PGC1α mRNA expression in several sarcoma or non-sarcoma cell lines including CCS cell lines (SU and KAS). (B) Immunoblot analyses of SHARPIN, PRMT5, SDMA, SOX10, MITF, PGC1α and SLC7A11 in four permanent CCS cell lines, one primary CCS cell line, and HDF. (C) A qPCR analysis of SHARPIN mRNA expression in CCS clinical samples (n = 11) and normal tissues (n = 4). (D) The effect of knockdown of SHARPIN on PGC1α protein expression in SU and KAS cell lines. (E) Viability assays of SU and KAS cells expressing scrambled or SHARPIN-specific shRNAs. The cells were treated with or without the indicated concentration of RSL3 for 24 h. Cell viability was measured using the ratio of live cells in treated/control. (C) A box-and-whisker plot is shown. Statistical significance was calculated using a Mann–Whitney U test. * p < 0.05. (E) Statistical significance was calculated via a one-way ANOVA or Student’s t-test. Quantitative data are presented as the mean ± SD (n = 3). NS, not significant. The uncropped blots are shown in File S1.

Article Snippet: Antibodies targeting the following proteins were used: TFRC (ab214039, Abcam, Cambridge, UK), FPN (NBP1-21502, Novus Biologicals, Englewood, CO, USA), FTH1 (ab65080, Abcam), SLC7A11 (600-401-GU3, Rockland Immunochemicals, Pottstown, PA, USA), GPX4 (ab125066, Abcam), GAPDH (sc-32233, Santa Cruz Biotechnology, Dallas, TX, USA), PGC1α (NBP1-04676, Novus Biologicals), SHARPIN (ABF128, Millipore, Burlington, MA, USA), β-actin (#4970, Cell Signaling Technology, Danvers, MA, USA), VDAC1/3 (ab14734, Abcam), PRMT5 (sc-376937, Santa Cruz Biotechnology), SDMA (SYM10; 07- 412, Millipore), SOX10 (sc-365692, Santa Cruz Biotechnology), MITF (ab12039, Abcam), LC3B (NB100-2220, Novus Biologicals), NRF2 (#12721, Cell Signaling Technology), Parkin (#4211, Cell Signaling Technology), and BNIP3L/NIX (#12396, Cell Signaling Technology).

Techniques: Expressing, Inhibition, Western Blot, Knockdown, Concentration Assay, Control, Whisker Assay, MANN-WHITNEY

Journal: Cancers

Article Title: SHARPIN Enhances Ferroptosis in Synovial Sarcoma Cells via NF-κB- and PRMT5-Mediated PGC1α Reduction.

doi: 10.3390/cancers15133484

Figure Lengend Snippet: Figure 6. PRMT5 and NF-κB are essential regulators of ferroptosis downstream of SHARPIN. (A) Immunoblot and qPCR analyses of the effect of knockdown of SHARPIN on the expression levels of SDMA protein and IL-6 mRNA in Yamato cells. (B) The effect of a PRMT5 inhibitor, EPZ01566, on PGC1α, SLC7A11, and SDMA protein levels in Yamato cells. (C) The effect of a NF-κB inhibitor, SC- 514, on PGC1α protein, SLC7A11 protein, and IL-6 mRNA levels in Yamato cells. (D) Kaplan–Meier curve showing the relationship between DFS and SHARPIN and/or TFRC gene amplification (AMP), based on a TCGA dataset of all types of cancer. Subjects were divided into SHARPIN only AMP, TFRC only AMP, SHARPIN and TFRC AMP, and no AMP groups. (E) Kaplan–Meier curve showing the relationship between OS and SHARPIN and/or TFRC gene amplification (AMP), based on a TCGA dataset of soft tissue sarcoma samples. Subjects were divided into SHARPIN only AMP or HIGH (z-score ≥2), TFRC only AMP or HIGH, SHARPIN and TFRC AMP or HIGH, and no AMP or HIGH groups. (A,C) Statistical significance was calculated via a one-way ANOVA or Student’s t-test. Quantitative data are presented as the mean ± SD (n = 3). * p < 0.05. (D,E) Statistical significance was calculated using a log-rank test. The p-value is shown in each figure. The uncropped blots are shown in File S1.

Article Snippet: Antibodies targeting the following proteins were used: TFRC (ab214039, Abcam, Cambridge, UK), FPN (NBP1-21502, Novus Biologicals, Englewood, CO, USA), FTH1 (ab65080, Abcam), SLC7A11 (600-401-GU3, Rockland Immunochemicals, Pottstown, PA, USA), GPX4 (ab125066, Abcam), GAPDH (sc-32233, Santa Cruz Biotechnology, Dallas, TX, USA), PGC1α (NBP1-04676, Novus Biologicals), SHARPIN (ABF128, Millipore, Burlington, MA, USA), β-actin (#4970, Cell Signaling Technology, Danvers, MA, USA), VDAC1/3 (ab14734, Abcam), PRMT5 (sc-376937, Santa Cruz Biotechnology), SDMA (SYM10; 07- 412, Millipore), SOX10 (sc-365692, Santa Cruz Biotechnology), MITF (ab12039, Abcam), LC3B (NB100-2220, Novus Biologicals), NRF2 (#12721, Cell Signaling Technology), Parkin (#4211, Cell Signaling Technology), and BNIP3L/NIX (#12396, Cell Signaling Technology).

Techniques: Western Blot, Knockdown, Expressing