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4 protocols using insuli n i9278

1

Entinostat Biomarker Evaluation Protocol

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Entinostat (MS-275) was purchased from MedChemExpress (Monmouth Junction, NJ, United States). Other chemicals, including bovine serum albumin (BSA; 2207008), PA (P5585), and insuli n (I9278) were purchased from Sigma-Aldrich (Burlington, MA, United States). 2-(N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)-amino)-2-deoxyglucose (2-NBDG; N13195), 4,4-difluoro-1,3,5,7,8-pentamethyl-4-bora-3a,4a-diaza-s-indacene (BODIPY™ 493/503; D3922), and MitoSOX Red mitochondrial superoxide indicator (M36008) were obtained from Thermo Fisher Scientific (Waltham, MA, United States). Anti-histone deacetylase 1 (HDAC1) (34589), anti-HDAC2 (57156), anti-HDAC3 (85057), anti-phospho-AKT (9271), anti-AKT (9272), anti-phospho-GSK3 α/β (9331), anti-GSK3β (9315), anti-phospho-JNK (9251), anti-JNK (9252), anti-phospho-NF-kB (3033), and anti-NF-kB (3034) antibodies were obtained from Cell Signaling Technology (Beverly, MA, United States). Anti-β-actin (A300-491A) antibody was purchased from Bethyl Laboratories (Montgomery, TX, United States). Anti-α-tubulin (sc-5286) antibody was purchased from Santa Cruz biotechnology (Dallas, TX, United States).
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2

SUM159 Cell Culture and Stable Transfection

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Human-derived, mostly diploid SUM159 cells were grown in DMEM/F-12/GlutaMAX (10565-042; Thermo Fisher Scientific, Waltham, MA) supplemented with 5% fetal bovine serum (FBS; S11150; Atlanta Biologicals, Flowery Branch, GA), 100 U/ml penicillin and streptomycin (45000-652; VWR International, Radnor, PA), 1 μg/ml hydrocortisone (H4001; Sigma-Aldrich, St. Louis, MO), 5 μg/ml insulin (I9278; Sigma-Aldrich), and 10 mM 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES; 25-060-CI; Mediatech, Manassas, VA), pH 7.4. The BSC1 monkey kidney epithelial cells stably expressing eGFP-CAAX (Boucrot and Kirchhausen, 2007 (link)) together with H2B-mCherry were generated by transfection with a plasmid encoding H2B-mCherry. Cells simultaneously expressing eGFP-CAAX and H2B-mCherry were selected for 7 d using 50 μg/ml puromycin, followed by cell sorting with FACSAria II (BD Biosciences, San Jose, CA). Cells were grown in DMEM (10569-044; Life Technologies) supplemented with 10% FBS, 100 U/ml penicillin and streptomycin, and, when required, 50 μg /ml puromycin.
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3

Empagliflozin and Compound C Protocol

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Empagliflozin (EMPA, Cat: HY-108682) and Compound C (Dorsomorphin; Cat HY-13418A) were purchased from MedChemExpress (Monmouth Junction, NJ, United States). Other chemicals, including bovine serum albumin (BSA; 2207008), PA (P5585), and insulin (I9278) were purchased from Sigma-Aldrich (Burlington, MA, United States). 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)-amino]-2-deoxyglucose (2-NBDG; N13195) was obtained from Thermo Fisher Scientific (Waltham, MA, United States). Cell Death Detection enzyme-linked immunosorbent assay (ELISAplus) kit was purchased from Roche Applied Science (Roche Applied Science, Mannheim, Germany). AMP colorimetric assay kit was purchased from Biovision (Cat; K229, Milpitas, CA, United States). Antibodies targeting phospho-AKT (#9271), T-AKT (#9272), phospho-GSK3 α/β (#9331), T-GSK3β (#9315), phospho-JNK (#9251), T-JNK (#9252), phospho-eIF2A (#9721), T-eIF2A (#9722), CHOP (#2895), phospho-NF-κB p65 (#3033), NF-κB p65 (#3034), phospho-p38 (#9211), cleaved caspase-3(#9661), phospho-AMP (#2531), and T-AMP (#2532) were obtained from Cell Signaling Technology (Beverly, MA, United States). Anti-β-actin (A300-491A) antibody was purchased from Bethyl Laboratories (Montgomery, TX, United States).
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4

Metabolic Intervention in Dio Mice

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Fourteen-week-old Dio mice, which had already been given a high fat diet (D12492) for 8 weeks, were purchased from JAX Lab (stock #000664). After quarantine, the mice were divided into three groups. Each group had 8 mice. For 2 weeks, 10 µg/kg body weight/day of HDAC3 inhibitor was administrated by intraperitoneal injection. Control groups were given PBS with 0.1% DMSO (solvent). Pioglitazone was applied in the diet at the dose of 10 mg/kg body weight/day. ITT was conducted by intraperitoneal injection of insulin (I9278, Sigma) at 0.75 unit/kg of body weight in mice after a 4-h fast, as described elsewhere (Gao et al. 2009 (link)). Blood glucose was monitored in the tail vein blood using the FreeStyle blood glucose monitoring system (TheraSense, Phoenix, AZ).
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