Journal: Oxidative Medicine and Cellular Longevity

Article Title: Melatonin Inhibits the Ferroptosis Pathway in Rat Bone Marrow Mesenchymal Stem Cells by Activating the PI3K/AKT/mTOR Signaling Axis to Attenuate Steroid-Induced Osteoporosis

doi: 10.1155/2022/8223737

Figure Lengend Snippet: MT reduces ferroptosis in DEX-induced BMSCs by activating the PI3K-AKT-mTOR pathway. (a–d) Western blot results for the expressions of PI3K-p85, p-AKT, AKT, p-mTOR, and mTOR were pretreated with various concentrations of MT for 24 h; DEX (10 −3 M) was then added for 24 h. (e) Images of immunofluorescence staining of PI3K in BMSCs. (f) Quantification of the fluorescence intensity of PI3K immunofluorescence positively stained cells. These studies were performed at least 3 biological replicates. Data represent mean ± SD ( n = 3). ∗ P < 0.05, ∗∗ P < 0.01, ∗∗∗ P < 0.005 compared with control group. # P < 0.05, ## P < 0.01, ### P < 0.005 compared with DEX group.

Article Snippet: The primary antibodies included system xc − (1 : 2,000, orb100617, Biorbyt), ACSL4 (1 : 10,000, ab155282, Abcam), FSP1 (1 : 1,000, ab197896, Abcam), GPX4 (1 : 2,000, orb340797, Biorbyt), PI3K-p85 (1 : 1,000, orb621689, Biorbyt), AKT (1 : 1,000, orb99431, Biorbyt), p-ATK (1 : 1,000, orb344403, Biorbyt), mTOR (1 : 2,000, orb99435, Biorbyt), and p-mTOR (1 : 1,000, orb315804, Biorbyt) antibodies.

Techniques: Western Blot, Immunofluorescence, Staining, Fluorescence, Control

Journal: Oxidative Medicine and Cellular Longevity

Article Title: Melatonin Inhibits the Ferroptosis Pathway in Rat Bone Marrow Mesenchymal Stem Cells by Activating the PI3K/AKT/mTOR Signaling Axis to Attenuate Steroid-Induced Osteoporosis

doi: 10.1155/2022/8223737

Figure Lengend Snippet: The positive regulatory effect of MT was significantly weakened with the use of PI3K inhibitors. (a–d) Western blot results for the expressions of PI3K-p85, p-AKT, AKT, p-mTOR, and mTOR were pretreated with GDC-0941 and MT for 24 h; DEX (10 −3 M) was then added for 24 h. (e) Images of immunofluorescence staining of PI3K in BMSCs. (f) Quantification of the fluorescence intensity of PI3K immunofluorescence positively stained cells. (g) Annexin V-mCherry/SYTOX Green detection kit was used to detect cell death. (h) Quantitative analysis of the percentage of SYTOX green-positive cells in (g). (i) ROS staining was performed to test the level of oxidative stress in DEX + MT group and DEX + MT + GDC0941 group. (j) Quantitative analysis of the number of ROS-positive cells per field in (i). These studies were performed at least 3 biological replicates. Data represent mean ± SD ( n = 3). ∗ P < 0.05, ∗∗ P < 0.01, ∗∗∗ P < 0.005 compared with DEX + MT group.

Article Snippet: The primary antibodies included system xc − (1 : 2,000, orb100617, Biorbyt), ACSL4 (1 : 10,000, ab155282, Abcam), FSP1 (1 : 1,000, ab197896, Abcam), GPX4 (1 : 2,000, orb340797, Biorbyt), PI3K-p85 (1 : 1,000, orb621689, Biorbyt), AKT (1 : 1,000, orb99431, Biorbyt), p-ATK (1 : 1,000, orb344403, Biorbyt), mTOR (1 : 2,000, orb99435, Biorbyt), and p-mTOR (1 : 1,000, orb315804, Biorbyt) antibodies.

Techniques: Western Blot, Immunofluorescence, Staining, Fluorescence

Journal: Oxidative Medicine and Cellular Longevity

Article Title: Melatonin Inhibits the Ferroptosis Pathway in Rat Bone Marrow Mesenchymal Stem Cells by Activating the PI3K/AKT/mTOR Signaling Axis to Attenuate Steroid-Induced Osteoporosis

doi: 10.1155/2022/8223737

Figure Lengend Snippet: Schematic illustration of MT-mediated protection from GC-induced ferroptosis. Melatonin inhibits the ferroptosis pathway in rat bone marrow mesenchymal stem cells by activating the PI3K/AKT/mTOR signaling axis to attenuate steroid-induced osteoporosis.

Article Snippet: The primary antibodies included system xc − (1 : 2,000, orb100617, Biorbyt), ACSL4 (1 : 10,000, ab155282, Abcam), FSP1 (1 : 1,000, ab197896, Abcam), GPX4 (1 : 2,000, orb340797, Biorbyt), PI3K-p85 (1 : 1,000, orb621689, Biorbyt), AKT (1 : 1,000, orb99431, Biorbyt), p-ATK (1 : 1,000, orb344403, Biorbyt), mTOR (1 : 2,000, orb99435, Biorbyt), and p-mTOR (1 : 1,000, orb315804, Biorbyt) antibodies.

Techniques:

Journal: World Journal of Gastroenterology

Article Title: Antagonizing adipose tissue-derived exosome miR-103-hepatocyte phosphatase and tensin homolog pathway alleviates autophagy in non-alcoholic steatohepatitis: A trans-cellular crosstalk

doi: 10.3748/wjg.v29.i29.4528

Figure Lengend Snippet: The capacity of miR-103 in targeting phosphatase and tensin homolog gene and affecting autophagy. A: The luciferase reporter assay results verified the interaction between miR-103 and phosphatase and tensin homolog; B: Western blotting showed the differential expression of the autophagy-related protein; C: Transmission electron microscopy images of autophagosomes (red arrowhead) in the liver; D: The results of immunofluorescence staining showed liver autophagosomes in different groups. a P < 0.01 vs control; b P < 0.01 vs model; c P < 0.01 vs miR-103; d P < 0.05 vs model. PTEN: Phosphatase and tensin homolog; WT: Wild type; MUT: Mutant; DAPI: 4’,6-diamidino-2-phenylindole; mTOR: Mammalian target of rapamycin; NC: Negative control.

Article Snippet: The membranes were blocked and incubated overnight with antibodies against PTEN (9188T, CST), p-AMPK (ab32047, Abcam), p-mammalian target of rapamycin (mTOR) (CSB-PA271384, Cusabio), LC3 (12741T, CST), p62 (ab91526, Abcam), and GAPDH (ab245355, Abcam) at 4 °C.

Techniques: Luciferase, Reporter Assay, Western Blot, Quantitative Proteomics, Transmission Assay, Electron Microscopy, Immunofluorescence, Staining, Control, Mutagenesis, Negative Control

Journal: World Journal of Gastroenterology

Article Title: Antagonizing adipose tissue-derived exosome miR-103-hepatocyte phosphatase and tensin homolog pathway alleviates autophagy in non-alcoholic steatohepatitis: A trans-cellular crosstalk

doi: 10.3748/wjg.v29.i29.4528

Figure Lengend Snippet: The effect of adipose tissue-derived exosomes miR-103 on autophagy in mice. A and B: Western blotting detected the expression of the autophagy-related protein; C: The results of immunofluorescence staining to observe autophagosomes in the liver from different groups; D: Transmission electron microscopy images of autophagosomes (red arrowhead) in the liver from different groups. a P < 0.05 vs control; b P < 0.01 vs control; c P < 0.05 vs exosomes; d P < 0.01 vs exosomes. Exo: Exosomes; PTEN: Phosphatase and tensin homolog; DAPI: 4’,6-diamidino-2-phenylindole; mTOR: Mammalian target of rapamycin; NC: Negative control.

Article Snippet: The membranes were blocked and incubated overnight with antibodies against PTEN (9188T, CST), p-AMPK (ab32047, Abcam), p-mammalian target of rapamycin (mTOR) (CSB-PA271384, Cusabio), LC3 (12741T, CST), p62 (ab91526, Abcam), and GAPDH (ab245355, Abcam) at 4 °C.

Techniques: Derivative Assay, Western Blot, Expressing, Immunofluorescence, Staining, Transmission Assay, Electron Microscopy, Control, Negative Control