Journal: Oncology reports

Article Title: Intermittent low dose irradiation enhances the effectiveness of radio- and chemo-therapy for human colorectal adenocarcinoma cell line HT-29.

doi: 10.3892/or.2017.5679

Figure Lengend Snippet: Figure 5. Intermittent LDIR activates ERK and p38MAPK pathways in 5-FU chemotherapy. In order to inhibit the function of ERK and p38MAPK, 10 µM PD98059 and SB203580 were added to the cell culture media at 2 h prior to 5-FU chemotherapy. (A) Western blotting of the MEK/ERK pathway genes in HT-29 cells. β-actin was used as the internal control for blotting reaction. (B) Relative band density of western blotting. (C) Western blotting of the p38MAPK pathway genes in HT-29 cells. β-actin was used as the internal control for blotting reaction. (D) Relative band density of western blotting. (E) ERK pathway inhibitors could not reverse the intermittent LDIR induced cell proliferation inhibition. (F) p38MAPK pathway inhibitors neutralized the intermittent LDIR induced cell proliferation inhibition. L, LDIR; IL, intermittent LDIR; NS, not significant. **p<0.01 as compared with the single dose LDIR group.

Article Snippet: The blots were blocked with 5% non-fat milk in TBST at 37 ̊C for 1 h. Then, blots were probed with monoclonal antibodies against ATM (1:500, Abcam, Shanghai, China), p53 (1:1,500, DO7, Santa Cruz Biotechnology, Santa Cruz, CA, USA), p21 (1:500, C-19, Santa Cruz Biotechnology), cyclin A (1:500, Santa Cruz Biotechnology), CDK2 (1:500, Santa Cruz Biotechnology), caspase-3 (1:1,000, Cell Signaling Technology, Beijing, China), cleaved caspase-3 (1:1,000, Cell Signaling Technology), ERK/phos-ERK (1:1,000, Cell Signaling Technology), p38/phos-p38 (1:1,000, Cell Signaling Technology) and β-actin (1:3,000, Santa Cruz Biotechnology) at 4 ̊C overnight.

Techniques: Cell Culture, Western Blot, Control, Inhibition

Journal: Poultry Science

Article Title: PKA and PKC signaling pathways mediate vitamin D₃-regulated intestinal phosphorus absorption in broiler chickens

doi: 10.1016/j.psj.2026.106762

Figure Lengend Snippet: Effects of dietary vitamin D 3 supplementation on jejunal phosphorylation levels of PKA, PKC, PI3K, p38MAPK, and ERK in broiler chickens (19 d) (Experiment 1). The control and vitamin D 3 diets contained 0 and 1000 IU/kg vitamin D 3 , respectively. (a) p-PKA/t-PKA; (b) p-PKC/t-PKC; (c) p-PI3K/t-PI3K; (d) p-p38MAPK/t-p38MAPK; (e) p-ERK/t-ERK. Protein abundance values are means ± SD of four replicates per treatment (1 broiler per replicate) (n = 4). Values with different letters differ between treatments ( P < 0.05).

Article Snippet: PVDF membranes were incubated with primary antibodies against NaPi-IIb (1:1000, A9460; ABclonal, Wuhan, China), phosphorylated PKA (p-PKA; 1:1000, 5661S), phosphorylated PI3K (p-PI3K; 1:1000, 4228), phosphorylated ERK (p-ERK; 1:1000, 9101S), phosphorylated p38MAPK (p-p38MAPK; 1:1000, 9216S), total PKA (t-PKA; 1:1000, 5842S) (Cell Signaling Technology, Boston, USA), total PI3K (t-PI3K; 1:10000, 60225-1-Ig), total ERK (t-ERK; 1:8000, 11257-1-AP-50), total p38MAPK(t-p38MAPK; 1:1000, 14064-1-AP), total PKC (t-PKC; 1:1000, 21991-1-AP), phosphorylated PKC (p-PKC; 1:5000, 29123-1-AP), and GAPDH (1:10000, 60004-1-Ig) (Proteintech, Wuhan, China).

Techniques: Phospho-proteomics, Control, Quantitative Proteomics

Journal: Poultry Science

Article Title: PKA and PKC signaling pathways mediate vitamin D₃-regulated intestinal phosphorus absorption in broiler chickens

doi: 10.1016/j.psj.2026.106762

Figure Lengend Snippet: Effects of the PKA inhibitor H-89 on jejunal phosphorylation levels of PKC, PI3K, p38MAPK, and ERK in broiler chickens (10–15 d) (Experiment 2). (a) p-PKC/t-PKC; (b) p-PI3K/t-PI3K; (c) p-p38MAPK/t-p38MAPK; (d) p-ERK/t-ERK. Protein abundance values are means ± SD of four replicates per treatment (1 broiler per replicate) (n = 4). Values with different letters differ between treatments ( P < 0.05).

Article Snippet: PVDF membranes were incubated with primary antibodies against NaPi-IIb (1:1000, A9460; ABclonal, Wuhan, China), phosphorylated PKA (p-PKA; 1:1000, 5661S), phosphorylated PI3K (p-PI3K; 1:1000, 4228), phosphorylated ERK (p-ERK; 1:1000, 9101S), phosphorylated p38MAPK (p-p38MAPK; 1:1000, 9216S), total PKA (t-PKA; 1:1000, 5842S) (Cell Signaling Technology, Boston, USA), total PI3K (t-PI3K; 1:10000, 60225-1-Ig), total ERK (t-ERK; 1:8000, 11257-1-AP-50), total p38MAPK(t-p38MAPK; 1:1000, 14064-1-AP), total PKC (t-PKC; 1:1000, 21991-1-AP), phosphorylated PKC (p-PKC; 1:5000, 29123-1-AP), and GAPDH (1:10000, 60004-1-Ig) (Proteintech, Wuhan, China).

Techniques: Phospho-proteomics, Quantitative Proteomics

Journal: Poultry Science

Article Title: PKA and PKC signaling pathways mediate vitamin D₃-regulated intestinal phosphorus absorption in broiler chickens

doi: 10.1016/j.psj.2026.106762

Figure Lengend Snippet: Effects of the PKC inhibitor staurosporine on duodenal phosphorylation levels of PKA, PI3K, p38MAPK, and ERK in broiler chickens (13 d) (Experiment 3). (a) p-PKA/t-PKA; (b) p-PI3K/t-PI3K; (c) p-p38MAPK/t-p38MAPK; (d) p-ERK/t-ERK. Protein abundance values are means ± SD of four replicates per treatment (1 broiler per replicate) (n = 4). Values with different letters differ between treatments ( P < 0.05).

Article Snippet: PVDF membranes were incubated with primary antibodies against NaPi-IIb (1:1000, A9460; ABclonal, Wuhan, China), phosphorylated PKA (p-PKA; 1:1000, 5661S), phosphorylated PI3K (p-PI3K; 1:1000, 4228), phosphorylated ERK (p-ERK; 1:1000, 9101S), phosphorylated p38MAPK (p-p38MAPK; 1:1000, 9216S), total PKA (t-PKA; 1:1000, 5842S) (Cell Signaling Technology, Boston, USA), total PI3K (t-PI3K; 1:10000, 60225-1-Ig), total ERK (t-ERK; 1:8000, 11257-1-AP-50), total p38MAPK(t-p38MAPK; 1:1000, 14064-1-AP), total PKC (t-PKC; 1:1000, 21991-1-AP), phosphorylated PKC (p-PKC; 1:5000, 29123-1-AP), and GAPDH (1:10000, 60004-1-Ig) (Proteintech, Wuhan, China).

Techniques: Phospho-proteomics, Quantitative Proteomics

Journal: Journal of Biological Chemistry

Article Title: Differential Interactions between Transforming Growth Factor-β3/TβR1, TAB1, and CD2AP Disrupt Blood-Testis Barrier and Sertoli-Germ Cell Adhesion

doi: 10.1074/jbc.m601618200

Figure Lengend Snippet: FIGURE 5. Changes in different target proteins, including MAP kinases in testes during TGF-3-induced BTB and AJ disruption in the testis. A, immunoblot analysis to assess the changes of protein levels after TGF-3 treatment in the rat testis. These include the representative integral junction membrane proteins and their adaptors at the BTB and apical ES, the three MAP kinases, and Smad2/3 and their corresponding phosphorylated (activated) forms (panel a). Parallel immunoblot analysis of these proteins in the testes of adult rats received vehicle control (panel b). B, densitometric scanned data of immunoblots such as those shown in A. Each bar is the mean S.D. of three independents sets of samples from different experiments. C, intrinsic kinase activity of ERK (substrate, Elk-1) and p38 (substrate, ATF-2) (top panel), and these data were also summarized in the bottom panel (n 3). ns, not significantly different by ANOVA; *, p 0.05; **, p 0.01; h, hour; d, day; C, control; V, vehicle control; Elk-1, E26-like protein 1; ATF-2, activating transcription factor 2.

Article Snippet: Intrinsic ERK and p38 MAPK assays were performed using specific p-ERK and p38 MAPK assay kits (Cell Signaling) with the corresponding fusion proteins Elk-1 and ATF-2.

Techniques: Disruption, Western Blot, Membrane, Control, Activity Assay

Journal: Journal of Biological Chemistry

Article Title: Differential Interactions between Transforming Growth Factor-β3/TβR1, TAB1, and CD2AP Disrupt Blood-Testis Barrier and Sertoli-Germ Cell Adhesion

doi: 10.1074/jbc.m601618200

Figure Lengend Snippet: FIGURE 8. A schematic drawing that illustrates the association between CD2AP, TAB1, and TR1 (type 1 receptor for TGF-) can selectively disrupt BTB and Sertoli- germ cell adhesion or Sertoli-germ cell adhesion alone. This schematic drawing sum- marizes the results of the experiments reported herein. It illustrates that differential interactions of TAB1 and CD2AP with the TGF-3-TR1 complex in the seminiferous epithelium can activate downstream signal transducers p38 and/or ERK. For instance, the association of the TGF-3-TR1 complex with adaptors TAB1 and CD2AP activates both p38 and/or ERK, perturbing BTB and AJ. However, if this protein complex only associates with CD2AP but not TAB1, it activates only ERK, selectively perturbing AJ without compromising the BTB.

Article Snippet: Intrinsic ERK and p38 MAPK assays were performed using specific p-ERK and p38 MAPK assay kits (Cell Signaling) with the corresponding fusion proteins Elk-1 and ATF-2.

Techniques:

Journal: Scientific Reports

Article Title: Deubiquitinating enzyme USP42 promotes breast cancer progression by inhibiting JNK/p38-mediated apoptosis

doi: 10.1038/s41598-025-20573-x

Figure Lengend Snippet: USP42 downregulation increases apoptosis and regulates JNK and p38 phosphorylation in breast cancer cells. ( A , B ) Flow cytometric analysis of apoptotic cell numbers following USP42 downregulation in MCF-7 ( A ) and MDA-MB-231 ( B ) cells. ( C ) Western blot analysis of cleaved-caspase3, Bcl-2 and Bax protein levels in MCF-7 and MDA-MB-231 cells. β-actin served as an internal reference. ( D ) Western blotting analysis of p-p38, p38, JNK and p-JNK protein expression in MCF-7 and MDA-MB-231 cells. β-actin served as an internal reference.

Article Snippet: Specific information for the antibodies used in the experiment is as follows: USP42 (1:500, sc-390604, Santa Cruz Biotechnology, Inc., USA), JNK (9252, Cell Signaling Technology, 1:1000), p-JNK (9251, Cell Signaling Technology, 1:1000), p38 (9212, Cell Signaling Technology, 1:1000), p-p38 (9211, Cell Signaling Technology, 1:1000), β-actin (sc-47778, Santa Cruz Biotechnology, 1:1000).

Techniques: Phospho-proteomics, Western Blot, Expressing

Journal: Scientific Reports

Article Title: Deubiquitinating enzyme USP42 promotes breast cancer progression by inhibiting JNK/p38-mediated apoptosis

doi: 10.1038/s41598-025-20573-x

Figure Lengend Snippet: USP42 downregulation inhibits cell growth via the JNK/p38 signaling pathway. ( A - D ) Proliferation of MCF-7 and MDA-MB-231 cells transfected with shUSP42-2# or negative control, as assessed by CCK-8 assay ( A , C ) and clonogenic assay ( B , D ). The cells were treated with SP600125 (JNK inhibitor), SB203580 (p38 MAPK inhibitor), or DMSO (negative control). ( ns : no significance , *: p < 0.05, **: p < 0.01, ***: p < 0.001).

Article Snippet: Specific information for the antibodies used in the experiment is as follows: USP42 (1:500, sc-390604, Santa Cruz Biotechnology, Inc., USA), JNK (9252, Cell Signaling Technology, 1:1000), p-JNK (9251, Cell Signaling Technology, 1:1000), p38 (9212, Cell Signaling Technology, 1:1000), p-p38 (9211, Cell Signaling Technology, 1:1000), β-actin (sc-47778, Santa Cruz Biotechnology, 1:1000).

Techniques: Transfection, Negative Control, CCK-8 Assay, Clonogenic Assay

Journal: Scientific Reports

Article Title: Deubiquitinating enzyme USP42 promotes breast cancer progression by inhibiting JNK/p38-mediated apoptosis

doi: 10.1038/s41598-025-20573-x

Figure Lengend Snippet: USP42 downregulation increases breast cancer cells apoptosis via the JNK/p38 signaling pathway. ( A , D ) Flow cytometry analysis of apoptotic MCF-7 and MDA-MB-231 cells transfected with shUSP42-2# or the negative control, treated with SP600125 ( A ), SB203580 ( D ) or DMSO. ( B , C ) Western blot analysis of cleaved caspase 3, Bcl-2, Bax, p-p38 MAPK, p38 MAPK, JNK and p-JNK expression in MCF-7 and MDA-MB-231 cells transfected with shUSP42-2# or negative control, treated with SP600125 ( B ), SB203580 ( C ) or DMSO. β-actin served as an internal reference. (*: p < 0.05, **: p < 0.01, ***: p < 0.001).

Article Snippet: Specific information for the antibodies used in the experiment is as follows: USP42 (1:500, sc-390604, Santa Cruz Biotechnology, Inc., USA), JNK (9252, Cell Signaling Technology, 1:1000), p-JNK (9251, Cell Signaling Technology, 1:1000), p38 (9212, Cell Signaling Technology, 1:1000), p-p38 (9211, Cell Signaling Technology, 1:1000), β-actin (sc-47778, Santa Cruz Biotechnology, 1:1000).

Techniques: Flow Cytometry, Transfection, Negative Control, Western Blot, Expressing

Journal: Scientific Reports

Article Title: Deubiquitinating enzyme USP42 promotes breast cancer progression by inhibiting JNK/p38-mediated apoptosis

doi: 10.1038/s41598-025-20573-x

Figure Lengend Snippet: USP42 promotes breast cancer tumor growth in vivo . ( A ) Schematic representation of in vivo experimental design. ( B ) Subcutaneous administration of MDA-MB-231 cells stably transfected with shUSP42-2# or the control vector into nude mice ( n = 4 per group). ( C ) Representative images of xenograft tumors in nude mice ( n = 4 per group). ( D ) Tumor weights in the shUSP42 and control vector groups ( n = 4 per group). ( E ) Western blot analysis of USP42, p-p38 MAPK, p38 MAPK, JNK and p-JNK protein expression in tumor tissues of xenograft mouse model ( n = 4 per group). (Data are presented as mean ± SD. *** p < 0.001).

Article Snippet: Specific information for the antibodies used in the experiment is as follows: USP42 (1:500, sc-390604, Santa Cruz Biotechnology, Inc., USA), JNK (9252, Cell Signaling Technology, 1:1000), p-JNK (9251, Cell Signaling Technology, 1:1000), p38 (9212, Cell Signaling Technology, 1:1000), p-p38 (9211, Cell Signaling Technology, 1:1000), β-actin (sc-47778, Santa Cruz Biotechnology, 1:1000).

Techniques: In Vivo, Stable Transfection, Transfection, Control, Plasmid Preparation, Western Blot, Expressing

Journal: International Journal of Molecular Sciences

Article Title: P38 Regulates Kainic Acid-Induced Seizure and Neuronal Firing via Kv4.2 Phosphorylation

doi: 10.3390/ijms21165921

Figure Lengend Snippet: p38 mitogen-activated protein kinase (MAPK) contributed to kainic acid-induced seizure in WT mice but not Kv4.2TA mice. ( A ) Time course of mean behavioral seizure score following kainic acid injection. The mean behavioral seizure score was significantly reduced in Kv4.2TA mice compared to WT mice. Furthermore, p38 inhibitor SB 203580 significantly reduced behavioral seizure score following kainic acid injection in WT mice but not in Kv4.2TA mice, n = 13–15 for each group, two-way ANOVA, * p < 0.05. ( B ) Total behavioral seizure score for each group, n = 13–15 for each group, t -test, * p < 0.05. ( C ) Latency to stage 3 seizure for each group. n = 13–15 for each group, t -test, ** p < 0.01.

Article Snippet: The p38 construct was from Addgene (Watertown, MA, USA, 20351).

Techniques: Injection

Journal: International Journal of Molecular Sciences

Article Title: P38 Regulates Kainic Acid-Induced Seizure and Neuronal Firing via Kv4.2 Phosphorylation

doi: 10.3390/ijms21165921

Figure Lengend Snippet: p38 MAPK contributes to kainic acid-induced Kv4.2 phosphorylation at T607. ( A ) SB 203580, a potent p38 inhibitor (20 mg/kg, i.p., 15 min), blocked kainic acid-induced phosphorylation of Kv4.2 T607 in mouse hippocampus. ( B ) Statistical analysis of the effect of SB 203580 on kainic acid-induced phosphorylation of Kv4.2 at Thr607 in mouse hippocampus, n = 4–6 in each group, t -test, ** p < 0.01.

Article Snippet: The p38 construct was from Addgene (Watertown, MA, USA, 20351).

Techniques: Phospho-proteomics

Journal: International Journal of Molecular Sciences

Article Title: P38 Regulates Kainic Acid-Induced Seizure and Neuronal Firing via Kv4.2 Phosphorylation

doi: 10.3390/ijms21165921

Figure Lengend Snippet: p38 MAPK colocalizes with Kv4.2. ( A ) HEK293T cells were transfected with GFP-Kv4.2 and Flag-p38. Cells were fixed and stained with GFP and Flag to show co-localization. Scale bar: 20 μm. ( B ) High magnification images and line scan analysis of colocalization. Scale bar: 5 μm. ( C ) Mouse brains were co-stained with Kv4.2 and pp38 antibody. Phosphorylated p38 is localized in the cell body and dendrites as well. Scale bar: 20 μm. ( D ) High magnification images showing Kv4.2 and pp38 colocalized in dendrites, as indicated with arrow heads. Scale bar: 5 μm.

Article Snippet: The p38 construct was from Addgene (Watertown, MA, USA, 20351).

Techniques: Transfection, Staining

Journal: International Journal of Molecular Sciences

Article Title: P38 Regulates Kainic Acid-Induced Seizure and Neuronal Firing via Kv4.2 Phosphorylation

doi: 10.3390/ijms21165921

Figure Lengend Snippet: Kainic acid activates p38 MAPK in both WT and Kv4.2TA mice. ( A ) Immunostaining analysis showed p38 phosphorylation increased with kainic acid administration (25 mg/kg, i.p., 30 min) in mouse hippocampus, n = 26 cells in each group, t -test, *** p < 0.001. ( B ) Western blot analysis showed p38 phosphorylation increased with kainic acid administration (25 mg/kg, i.p., 30 min) in hippocampus in both WT and Kv4.2TA mice, n = 4–6 cells in each group, t -test, *** p < 0.001.

Article Snippet: The p38 construct was from Addgene (Watertown, MA, USA, 20351).

Techniques: Immunostaining, Phospho-proteomics, Western Blot

Journal: International Journal of Molecular Sciences

Article Title: P38 Regulates Kainic Acid-Induced Seizure and Neuronal Firing via Kv4.2 Phosphorylation

doi: 10.3390/ijms21165921

Figure Lengend Snippet: p38 impacts hippocampal pyramidal neuron excitability through Kv4.2. ( A ) Current step of +300 pA induces repetitive firing in pyramidal neurons recorded from WT and Kv4.2TA mice with or without SB 203580 treatment. Scale 40 mV/250 ms. Square current inset 300 pA. ( B ) Sequential somatic current injections increasing in magnitude reveal p38 kinase inhibition reduces AP firing frequency in WT hippocampal neurons at +300 pA relative to vehicle ( n = 15 in vehicle, n = 19 in treatment; two-way ANOVA, * p < 0.05). Kv4.2TA neurons display reduced firing frequency at +300 pA relative to WT in vehicle, which is augmented in the presence of SB 203580 such that current magnitudes of +200 and +250 pA also exhibit significant differences ( n = 18 in vehicle, n = 14 in SB 203580; two-way ANOVA, * p < 0.05; *** p < 0.001). ( C ) Inter-spike intervals measured between the first two spikes in a train evoked by 150 pA injection display no significant difference among groups. Kruskal–Wallis test, p > 0.05. ( D ) Ramp current injections evoke repetitive firing in all pyramidal neurons recorded in each condition. Arrow indicates point at which action potential (AP) threshold, rheobase, and latency to fire were measured. Ramp current inset 400 pA/s. ( E ) Minimum current to elicit AP firing at threshold (rheobase) is not significantly different among the populations. One-way ANOVA, p > 0.05. ( F ) Latency to fire in response to ramp injection is not significantly different among populations. Kruskal–Wallis test, p > 0.05.

Article Snippet: The p38 construct was from Addgene (Watertown, MA, USA, 20351).

Techniques: Inhibition, Injection