Journal: Acta biochimica et biophysica Sinica

Article Title: miR-29b-1-5p exacerbates myocardial injury induced by sepsis in a mouse model by targeting TERF2.

doi: 10.3724/abbs.2024020

Figure Lengend Snippet: Figure 2. Inhibition of miR-29b-1-5p ameliorates lipopolysaccharide (LPS)-induced septic myocardial injury in mice (A) Mice received a single intraperitoneal injection of 25 mg/kg LPS (lethal dose) or a tail vein injection of 80 mg/kg miR-29b-1-5p/NC antagomir for 3 consecutive days (24 h later receiving LPS injection), after which the survival conditions were assessed for 96 h, and survival rate curves were generated. An equal amount of saline was injected into the control group. n=20. Mice received a single intraperitoneal injection of 10 mg/kg LPS or a tail vein injection of 80 mg/kg miR-29b-1-5p/NC antagomir for 3 consecutive days (24 h later receiving LPS injection). (B) Twenty-four hours after LPS injection, echocardiography tests were performed. (C,D) Mice were euthanized, and histological analysis of myocardial tissue injury was performed via hematoxylin and eosin (HE) staining and Masson’s trichrome staining. Scale bar: 50 μm. (F,G) The cardiac injury score and fibrotic area were assessed via HE and Masson’s trichrome staining, respectively. (E,H) α-Smooth muscle actin (α-SMA) expression in mouse myocardial tissues was determined via immunohistochemistry (IHC) staining. Scale bar: 20 μm. (I‒L) Tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6 and cardiac troponin I (cTnI) levels in mouse serum were determined by enzyme-linked immunosorbent assay (ELISA). (M) The miR-29b-1-5p expression level in mouse myocardial tissue was determined by real-time quantitative reverse transcription PCR (qRT-PCR). n=6. (N) The protein levels of TLR2, TLR4, TFEB, LAMP1 and LC3II in mouse myocardial tissues were determined by western blot analysis. n=3. **P<0.01 vs the control group; #P<0.05 and ##P<0.01 vs. the LPS+NC antagomir group.

Article Snippet: Jiang et al. Acta Biochim Biophys Sin 2024 4°C with the following antibodies: anti-TERF2 (1:1000; 66893-1-Ig; Proteintech, Wuhan, China), anti-Bax (1:1000; ab32503; Abcam), anti-Bcl-2 (1:2000; ab182858; Abcam), anti-cleaved caspase-3 (1:5000; ab214430; Abcam), anti-Pro-caspase-3 (1:10,000; ab32499; Abcam), anti-cleaved PARP (1:1000; ab32064; Abcam), anti-TLR2 (1:1000; DF7002; Affinity Bioscience, Beijing, China), anti-TLR4 (1:1000; 19811-1-AP; Proteintech), anti-TFEB (1:1000; 13372-1-AP; Proteintech), anti-LAMP1(1:1000; 67300-1-Ig; Proteintech), anti-LC3II (1:1000; 14600-1-AP; Proteintech), anti-β-actin (1:1000; ab8227; Abcam), and anti-GAPDH (1:1000, AF7021; Affinity Bioscience), followed by incubation with HPR-conjugated goat anti-mouse or rabbit IgG secondary antibody (1:2000; SA00001-2 or SA00001-1; Proteintech) for 2 h at room temperature.

Techniques: Inhibition, Injection, Generated, Saline, Control, Staining, Expressing, Immunohistochemistry, Enzyme-linked Immunosorbent Assay, Reverse Transcription, Quantitative RT-PCR, Western Blot

Journal: Acta biochimica et biophysica Sinica

Article Title: miR-29b-1-5p exacerbates myocardial injury induced by sepsis in a mouse model by targeting TERF2.

doi: 10.3724/abbs.2024020

Figure Lengend Snippet: Figure 3. Inhibition of miR-29b-1-5p ameliorates CLP-induced septic myocardial injury in mice (A) Mice were subjected to CLP surgery or tail vein injection of 80 mg/kg miR-29b-1-5p/NC antagomir for 3 consecutive days (24 h later receiving CLP surgery), after which the survival conditions were assessed for 96 h, and survival rate curves were generated. n=20. A sham operation was performed on the control group. n=20. (B) Twenty- four hours after CLP surgery, echocardiography was performed. (C,D) Mice were euthanized, and histological analysis of myocardial tissue injury was performed via HE staining and Masson’s trichrome staining. Scale bar: 50 μm. (F,G) The cardiac injury score and fibrotic area were assessed via HE and Masson’s trichrome staining, respectively. (E,H) The protein levels and distribution of α-SMA in mouse myocardial tissues were examined using IHC staining. Scale bar: 20 μm. (I‒L) TNF-α, IL-1β, IL-6 and cTnI levels in mouse serum were determined by ELISA. (M) The miR-29b- 1-5p expression level in mouse myocardial tissue was determined by qRT-PCR. n=6. (N) The protein levels of TLR2, TLR4, TFEB, LAMP1 and LC3II in mouse myocardial tissues were determined by western blot analysis. n=3. **P<0.01 vs the control group; #P<0.05 and ##P<0.01 vs the CLP+NC antagomir group.

Article Snippet: Jiang et al. Acta Biochim Biophys Sin 2024 4°C with the following antibodies: anti-TERF2 (1:1000; 66893-1-Ig; Proteintech, Wuhan, China), anti-Bax (1:1000; ab32503; Abcam), anti-Bcl-2 (1:2000; ab182858; Abcam), anti-cleaved caspase-3 (1:5000; ab214430; Abcam), anti-Pro-caspase-3 (1:10,000; ab32499; Abcam), anti-cleaved PARP (1:1000; ab32064; Abcam), anti-TLR2 (1:1000; DF7002; Affinity Bioscience, Beijing, China), anti-TLR4 (1:1000; 19811-1-AP; Proteintech), anti-TFEB (1:1000; 13372-1-AP; Proteintech), anti-LAMP1(1:1000; 67300-1-Ig; Proteintech), anti-LC3II (1:1000; 14600-1-AP; Proteintech), anti-β-actin (1:1000; ab8227; Abcam), and anti-GAPDH (1:1000, AF7021; Affinity Bioscience), followed by incubation with HPR-conjugated goat anti-mouse or rabbit IgG secondary antibody (1:2000; SA00001-2 or SA00001-1; Proteintech) for 2 h at room temperature.

Techniques: Inhibition, Injection, Generated, Control, Staining, Immunohistochemistry, Enzyme-linked Immunosorbent Assay, Expressing, Quantitative RT-PCR, Western Blot

Journal: Acta biochimica et biophysica Sinica

Article Title: miR-29b-1-5p exacerbates myocardial injury induced by sepsis in a mouse model by targeting TERF2.

doi: 10.3724/abbs.2024020

Figure Lengend Snippet: Figure 4. Inhibition of miR-29b-1-5p ameliorates LPS-induced cardiomyocyte dysfunction in mice in vitro (A) Twenty-four hours after transfecting HL-1 cells with the NC or miR-29b-1-5p antagomir, LPS (1 μg/mL) stimulation was applied for another 24 h, and miR-29b-1-5p expression was validated in each group by qRT-PCR. (B) After LPS treatment for 0, 24, 48, or 72 h, MTT assay was performed to examine the viability of the HL-1 cells. (C) Flow cytometry was used to evaluate apoptosis in HL-1 cells. (D‒F) TNF-α, IL-1β, and IL-6 levels in HL-1 cell supernatants were measured by enzyme-linked immunosorbent assay (ELISA). (G‒I) Western blot analysis was used to measure Bax, Bcl-2, cleaved caspase-3, pro- caspase-3, TLR2, TLR4, TFEB, LAMP1 and LC3II protein levels in HL-1 cells. n=3. **P<0.01 vs the control group; ##P<0.01 vs the LPS+NC antagomir group.

Article Snippet: Jiang et al. Acta Biochim Biophys Sin 2024 4°C with the following antibodies: anti-TERF2 (1:1000; 66893-1-Ig; Proteintech, Wuhan, China), anti-Bax (1:1000; ab32503; Abcam), anti-Bcl-2 (1:2000; ab182858; Abcam), anti-cleaved caspase-3 (1:5000; ab214430; Abcam), anti-Pro-caspase-3 (1:10,000; ab32499; Abcam), anti-cleaved PARP (1:1000; ab32064; Abcam), anti-TLR2 (1:1000; DF7002; Affinity Bioscience, Beijing, China), anti-TLR4 (1:1000; 19811-1-AP; Proteintech), anti-TFEB (1:1000; 13372-1-AP; Proteintech), anti-LAMP1(1:1000; 67300-1-Ig; Proteintech), anti-LC3II (1:1000; 14600-1-AP; Proteintech), anti-β-actin (1:1000; ab8227; Abcam), and anti-GAPDH (1:1000, AF7021; Affinity Bioscience), followed by incubation with HPR-conjugated goat anti-mouse or rabbit IgG secondary antibody (1:2000; SA00001-2 or SA00001-1; Proteintech) for 2 h at room temperature.

Techniques: Inhibition, In Vitro, Expressing, Quantitative RT-PCR, MTT Assay, Flow Cytometry, Enzyme-linked Immunosorbent Assay, Western Blot, Control

Journal: Acta biochimica et biophysica Sinica

Article Title: miR-29b-1-5p exacerbates myocardial injury induced by sepsis in a mouse model by targeting TERF2.

doi: 10.3724/abbs.2024020

Figure Lengend Snippet: Figure 6. Silencing of TERF2 partially reverses the ameliorative effect of miR-29b-1-5p inhibition on LPS-induced cardiomyocyte apoptosis and inflammation (A) HL-1 cells were transfected with sh-TERF2 or sh-NC vector. Forty-eight hours later, HL-1 cells were collected to detect the protein expression of TERF2. (B‒I) HL-1 cells were transfected with sh-TERF2 or the miR-29b-1-5p antagomir for 24 h, followed by stimulation with LPS. MTT assay was performed to examine HL-1 cell viability (B). Flow cytometry was performed to evaluate HL-1 cell apoptosis (C). ELISA was also conducted to evaluate TNF-α, IL-1β, and IL-6 levels in HL-1 cells (D‒F). Western blot analysis was conducted to determine the protein levels of TERF2, cleaved PARP, cleaved caspase-3, pro-caspase-3, TLR2, TLR4, TFEB, LAMP1 and LC3II in HL-1 cells (G–I). **P<0.01 vs LPS+NC antagomir+ sh-NC; #P<0.05, ##P<0.01 vs LPS+miR-29b-1-5p antagomir+sh-TERF2.

Article Snippet: Jiang et al. Acta Biochim Biophys Sin 2024 4°C with the following antibodies: anti-TERF2 (1:1000; 66893-1-Ig; Proteintech, Wuhan, China), anti-Bax (1:1000; ab32503; Abcam), anti-Bcl-2 (1:2000; ab182858; Abcam), anti-cleaved caspase-3 (1:5000; ab214430; Abcam), anti-Pro-caspase-3 (1:10,000; ab32499; Abcam), anti-cleaved PARP (1:1000; ab32064; Abcam), anti-TLR2 (1:1000; DF7002; Affinity Bioscience, Beijing, China), anti-TLR4 (1:1000; 19811-1-AP; Proteintech), anti-TFEB (1:1000; 13372-1-AP; Proteintech), anti-LAMP1(1:1000; 67300-1-Ig; Proteintech), anti-LC3II (1:1000; 14600-1-AP; Proteintech), anti-β-actin (1:1000; ab8227; Abcam), and anti-GAPDH (1:1000, AF7021; Affinity Bioscience), followed by incubation with HPR-conjugated goat anti-mouse or rabbit IgG secondary antibody (1:2000; SA00001-2 or SA00001-1; Proteintech) for 2 h at room temperature.

Techniques: Inhibition, Transfection, Plasmid Preparation, Expressing, MTT Assay, Flow Cytometry, Enzyme-linked Immunosorbent Assay, Western Blot

Journal: Metabolism open

Article Title: Deficiency of SREBP1c modulates autophagy mediated lipid droplet catabolism during oleic acid induced steatosis.

doi: 10.1016/j.metop.2021.100138

Figure Lengend Snippet: Fig. 4. Evaluation of autophagic activity following SREBP1c silencing and OA administration Cells were transfected with siRNA specific for SREBP1c and then treated with OA:BSA complex (0.5 mM) for 24 h to divide into following groups; i) control, ii) OA, iii) SREBP1c siRNA, iv) SREBP1c siRNA + OA. Representative BODIPY/LAMP1 co-stained confocal microscopic images from each group. Cells were fixed, and then stained for BODIPY (green), LAMP1 (red) and nuclei by DAPI (blue). The graph shows quantification of the numbers of lipid droplet co-localized with LAMP1 per cell as explained in Methods section (A). Protein expressions of each group were measured by western blotting following the normalization to β-actin against Beclin 1 (B) and LC3 antibodies (C). Scale bar = 10 μm Data are expressed as mean ± S.D. **p < 0.01, and *p < 0.05 vs. control, #p < 0.05 vs. OA, (n = 3). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)

Article Snippet: After the OA incubation with or without SREBP1c silencing, cells were fixed in 4% paraformaldehyde, blocked in 10% goat serum, and incubated with LAMP1 (Novus Biologicals, catalog No. NBP2-25154) primary antibody for overnight at 4 ◦C.

Techniques: Activity Assay, Transfection, Control, Staining, Western Blot