anti syn1  (Cell Signaling Technology Inc)

Journal: iScience

Article Title: GPR3 is an immediate-early gene-like GPCR regulating CREB-dependent neuronal differentiation

doi: 10.1016/j.isci.2026.114944

Figure Lengend Snippet: Gpr3 mRNA expressions after NGF-, Fsk-, and KCl-mediated neuronal differentiation in PC12 cells (A and B) PC12 cells were induced to differentiate using serum deprivation (0.5% FBS) and stimulation with NGF (50 ng/mL), Fsk (20 μM), or KCl (50 mM). (A) Representative images from PC12 cells stimulated with NGF, Fsk, or KCl at 8, 12, 24, and 48 h after induced differentiation. Scale bars are 50 μm. (B) To evaluate neuronal differentiation induced by various stimuli in PC12 cells, the expression of βIII-tubulin ( Tub-βIII ) and synapsin I ( Syn1 ) was examined. Representative immunofluorescence images of PC12 cells cultured in normal serum-containing medium (15% FBS) or stimulated with NGF, Fsk, or KCl for 48 h are shown. Cells were double-stained with anti-Tub-βIII (red) and anti-SYN1 (green) antibodies. Scale bars are 50 μm. (C) Representative immunoblots showing Tub-βIII and SYN1 protein expression in PC12 cells at 0, 12, 24, and 48 h after stimulation with NGF, Fsk, or KCl. GAPDH is shown as an endogenous loading control. Right margin indicates molecular mass standards (in kilodaltons, kDa). (D and E) Densitometric quantification of time-dependent changes in Tub-βIII (D) and SYN1 (E) protein expression. Data were normalized to GAPDH and are expressed relative to the 0 h value. Data are presented as the mean ± SEM from five independent cultures (biological replicates). ∗∗∗, p < 0.001; ∗∗, p < 0.01 vs. 0 h for each condition. (F) The expression of Gpr3 mRNA was evaluated at 0, 2, 4, 6, 12, 24, 48, and 96 h after induced differentiation, using RT-qPCR. Data represent relative Gpr3 expression (fold change vs. β-actin ) and are presented as the mean ± SEM from 4–6 independent cultures (biological replicates). ∗∗∗ p < 0.001, ∗∗ p < 0.01 and ∗ p < 0.05 vs. 0 h. NGF, neuronal growth factor; Fsk, forskolin; FBS, fetal bovine serum; GAPDH, glyceraldehyde-3-phosphate dehydrogenase. Source data for this figure are provided in .

Article Snippet: After washing, cells were permeabilized with 0.1% Triton X-100 and blocked with 3% normal goat serum in PBS for 1 h. Cells were then incubated overnight at 4°C with rabbit monoclonal anti-SYN1 antibody (1:200; Cell Signaling Technology, #5297) and/or mouse monoclonal anti-Bassoon antibody (1:200; Enzo, clone SAP7F407).

Techniques: Expressing, Immunofluorescence, Cell Culture, Staining, Western Blot, Control, Quantitative RT-PCR

Journal: iScience

Article Title: GPR3 is an immediate-early gene-like GPCR regulating CREB-dependent neuronal differentiation

doi: 10.1016/j.isci.2026.114944

Figure Lengend Snippet: Induced Gpr3 expression during neuronal differentiation modulates Syn1–3 expression in PC12 cells (A–C) Effects of the suppression of Gpr3 expression on Syn mRNA expression. PC12 cells were transfected with control or Gpr3 siRNA. Twenty-four hours after transfection, differentiation was induced using serum deprivation (0.5% FBS) and NGF (50 ng/mL). Syn1 (A), Syn2 (B), and Syn3 (C) mRNA expression was evaluated using RT-qPCR at 0, 24, 48, and 96 h after inducing differentiation. Data represent relative mRNA expression normalized to β-actin and are presented as the mean ± SEM for each condition (three independent replicates). ∗∗∗ p < 0.001, ∗∗ p < 0.01, and ∗ p < 0.05 vs. control at each time point. (D) Effects of the suppression of Nr4a expression on GPR3-mediated Syn1 mRNA expression. PC12 cells were transfected with Nr4a1 siRNA, Nr4a2 siRNA, or Nr4a3 siRNA together with pc-GPR3mAGFL plasmids. For the control, cells were co-transfected with control siRNA and pc-mAGFL (mock). Syn1 mRNA expression was evaluated using RT-qPCR 24 h after transfection. Data represent relative mRNA expression normalized to β-actin and are presented as the mean ± SEM for each condition (three biological replicates). ∗∗∗ p < 0.001 for each indicated group. (E) Primary cerebellar granule neurons (CGNs) were transfected with pc-GPR3mAGFL together with control siRNA, Nr4a1 siRNA, or Nr4a2/3 siRNAs. Syn1 mRNA expression was evaluated using RT-qPCR 24 h after transfection. Gpr3 upregulation significantly increased Syn1 expression, and this effect was abolished by Nr4a1 siRNA, whereas Nr4a2/3 siRNAs showed no significant suppression. Data represent relative mRNA expression normalized to β-actin and are presented as the mean ± SEM for each condition (three biological replicates). ∗∗ p < 0.01 and ∗ p < 0.05 for each indicated group.

Article Snippet: After washing, cells were permeabilized with 0.1% Triton X-100 and blocked with 3% normal goat serum in PBS for 1 h. Cells were then incubated overnight at 4°C with rabbit monoclonal anti-SYN1 antibody (1:200; Cell Signaling Technology, #5297) and/or mouse monoclonal anti-Bassoon antibody (1:200; Enzo, clone SAP7F407).

Techniques: Expressing, Transfection, Control, Quantitative RT-PCR

Journal: iScience

Article Title: GPR3 is an immediate-early gene-like GPCR regulating CREB-dependent neuronal differentiation

doi: 10.1016/j.isci.2026.114944

Figure Lengend Snippet: Developmental changes in Gpr3 , Syn1 , and Nr4a family gene expression in primary cortical neurons from wild-type and Gpr3 −/− mice (A–E) Primary cortical neurons were isolated from postnatal day 0–1 (P0–P1) wild-type (WT), and Gpr3 knockout ( Gpr3 −/− ) mice and cultured in vitro for up to 14 days (DIV0–DIV14). mRNA expression levels of Gpr3 (A), Syn1 (B), Nr4a1 (C), Nr4a2 (D), and Nr4a3 (E) were measured by RT-qPCR at DIV0, DIV0.7 (16 h), DIV1, DIV2, DIV4, DIV7, and DIV14. Data represent relative expression normalized to β-actin and are presented as the mean ± SEM for each condition (three biological replicates). ∗∗∗ p < 0.001, ∗∗ p < 0.01, and ∗ p < 0.05 vs. WT neurons at each time point.

Article Snippet: After washing, cells were permeabilized with 0.1% Triton X-100 and blocked with 3% normal goat serum in PBS for 1 h. Cells were then incubated overnight at 4°C with rabbit monoclonal anti-SYN1 antibody (1:200; Cell Signaling Technology, #5297) and/or mouse monoclonal anti-Bassoon antibody (1:200; Enzo, clone SAP7F407).

Techniques: Gene Expression, Isolation, Knock-Out, Cell Culture, In Vitro, Expressing, Quantitative RT-PCR

Journal: iScience

Article Title: GPR3 is an immediate-early gene-like GPCR regulating CREB-dependent neuronal differentiation

doi: 10.1016/j.isci.2026.114944

Figure Lengend Snippet: Reduced SYN1-positive puncta in cortical neurons from Gpr3 −/− mice in vitro (A) Staining for SYN1 and Bassoon in cortical neurons obtained from wild-type and Gpr3 −/− mice. Primary neurons were isolated from postnatal day 0–1 (P0–P1) and cultured for 14 days in vitro (DIV14). Neurons were fixed and immunostained with anti-SYN1 (green) and anti-Bassoon (red) antibodies. Representative images are shown. (B) For quantification, neurons were stained with anti-SYN1 (red) and DAPI (blue) at DIV7 and DIV14; representative images are shown. (C) SYN1-positive puncta were quantified within a region 10–25 μm from the nucleus. Quantification was performed using neurons from wild-type ( n = 6) and Gpr3 −/− ( n = 9) mice at DIV7 (left), and from wild-type ( n = 11) and Gpr3 −/− ( n = 9) mice at DIV14 (right) (C). Data are presented as the mean ± SEM for each condition. ∗ p < 0.05 for each indicated group.

Article Snippet: After washing, cells were permeabilized with 0.1% Triton X-100 and blocked with 3% normal goat serum in PBS for 1 h. Cells were then incubated overnight at 4°C with rabbit monoclonal anti-SYN1 antibody (1:200; Cell Signaling Technology, #5297) and/or mouse monoclonal anti-Bassoon antibody (1:200; Enzo, clone SAP7F407).

Techniques: In Vitro, Staining, Isolation, Cell Culture

Journal: Experimental & Molecular Medicine

Article Title: HMGCS2-dependent β-OHB/H3K9bhb ameliorates synaptic plasticity and cognition in Alzheimer’s disease

doi: 10.1038/s12276-026-01664-9

Figure Lengend Snippet: a , b , The representative immunoblots ( a ) and quantitative analyses ( b ) of Glun1, Glun2A, Glun2B and Syn1 in the hippocampus of the WT, 3xTg-AD and 3xTg-AD+β-OHB mice, n = 4 per group. c , RT–qPCR assays mRNA expression of the Glun1, Glun2A, Glun2B and Syn1 in the hippocampus of the WT, 3xTg-AD and 3xTg-AD+β-OHB mice, n = 5 per group. d , ChIP–qPCR analysis of the enrichment of H3K9bhb at Glun1, Glun2A, Glun2B, Glun2C and Syn1 promoters in the hippocampus of the WT, 3xTg-AD and 3xTg-AD+β-OHB mice, n = 5 per group. e , f , Supplementing with β-OHB could increase the density of 3xTg-AD dendritic spines detected by Golgi-cox staining; the representative images ( e ) and quantitative analysis ( f ) of spine, n = 5 per group, three fields per mice. Scale bar, 5 μm. g – j , The Sholl analysis showed the synaptic complexity of neurons after supplementing with β-OHB in 3xTg-AD mice; the representative images ( g and i ) and the quantitative analysis ( h and j ), n = 5 per group, two fields per mice. Scale bar, 50 μm. Data are shown as mean ± s.e.m. One-way ANOVA followed by Bonferroni’s post hoc test for b – d and f . Two-way ANOVA followed by Bonferroni’s post hoc test for i and k . * P < 0.05, ** P < 0.01, *** P < 0.001, **** P < 0.0001; ns, not significant.

Article Snippet: SYN1 , Synapsin-1 , Poly- , 1:1000 , Proteintech , 20258-1-AP.

Techniques: Western Blot, Quantitative RT-PCR, Expressing, ChIP-qPCR, Staining

Journal: Experimental & Molecular Medicine

Article Title: HMGCS2-dependent β-OHB/H3K9bhb ameliorates synaptic plasticity and cognition in Alzheimer’s disease

doi: 10.1038/s12276-026-01664-9

Figure Lengend Snippet: a – c , The HMGCS2 upregulation promotes the protein ( a and b ) and mRNA ( c ) expression of H3K9bhb, Glun1, Glun2A, Glun2B, Syn1 and PSD95, n = 4 or 5 per group. d , e , ChIP–qPCR analyses of the enrichment of H3K9bhb at Glun1, Glun2A, Glun2B and Syn1 promoters in the primary neurons of the WT, 3xTg-AD and 3xTg-AD + HMGCS2 mice n = 5 per group ( d ) and representative gel images from ChIP–qPCR assays ( e ). f – j , The HMGCS2 upregulation promotes the expression of Syn1 (scale bar, 25 μm) ( f ); n = 10 cells per group in MAP2 immunofluorescence ( g ) and quantitative analysis ( h ), n = 10 cells per group and SYP ( i and j ), n = 10 cells per group, scale bar, 15 μm. Data are shown as mean ± s.e.m. One-way ANOVA followed by Bonferroni’s post hoc test for b – d and j . Two-way ANOVA followed by Bonferroni’s post hoc test for h . * P < 0.05, ** P < 0.01 , *** P < 0.001, **** P < 0.0001; ns, not significant.

Article Snippet: SYN1 , Synapsin-1 , Poly- , 1:1000 , Proteintech , 20258-1-AP.

Techniques: Expressing, ChIP-qPCR, Immunofluorescence

Journal: Experimental & Molecular Medicine

Article Title: HMGCS2-dependent β-OHB/H3K9bhb ameliorates synaptic plasticity and cognition in Alzheimer’s disease

doi: 10.1038/s12276-026-01664-9

Figure Lengend Snippet: a , b , A western blot analysis ( a ) of hippocampal lysates shows that HMGCS2 upregulation increases the protein levels ( b ) of H3K9bhb, Glun1, Glun2A, Glun2B, Syn1 and PSD95, n = 3 per group. c , The ChIP–qPCR analysis of H3K9bhb enrichment at the promoters of Glun2A , Glun2B , Syn1 and PSD95 in the four groups, n = 5 per group. d , The mRNA levels of Glun1, Glun2A, Glun2B, Syn1 and PSD95 in the hippocampus, as determined by RT–qPCR, n = 5 per group. e , f , Golgi staining reveals increased dendritic spine density in 3xTg-AD mice following overexpression of HMGCS2; representative images ( e ) and quantification ( f ) are shown, n = 5 per group, three fields per mice. Scale bar, 5 μm. g – j , A behavioral assessment of spatial learning and memory using the MWM, NOR and contextual fear conditioning tests: area under the curve (AUC) of escape latency during MWM training of day 1–6 ( g ), escape latency on day 7 of the MWM test ( h ), NOR discrimination index ( i ), freezing time on day 7 in the contextual fear conditioning test ( j ), n = 8 per group. Data are shown as mean ± s.e.m. One-way ANOVA followed by Bonferroni’s post hoc test for b – d , f and g – j . * P < 0.05, ** P < 0.01 , *** P < 0.001, **** P < 0.0001; ns, not significant.

Article Snippet: SYN1 , Synapsin-1 , Poly- , 1:1000 , Proteintech , 20258-1-AP.

Techniques: Western Blot, ChIP-qPCR, Quantitative RT-PCR, Staining, Over Expression