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6 protocols using molidustat

1

Mycobacterial antigen extraction and THP-1 cell culture

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Primary human cells were cultured in RPMI 1640 (Life Technologies) supplemented with 2 mM glutamine (Sigma), 10 mM HEPES, 13 mM NaHCO3, 100 µg/ml streptomycin, 60 µg/ml penicillin (all from Biochrom) and 5% heat-inactivated human AB serum (Sigma) (complete medium). For THP-1 cells (ATCC® TIB-202™, Institute for Medical Microbiology and Hygiene, Ulm University) heat-inactivated human AB serum was replaced by 20% fetal calf serum ([FCS] Sigma). For experiments involving the virulent laboratory strain Mtb H37Rv (ATCC® 27294™, Institute for Medical Microbiology and Hygiene, Ulm University) the medium was modified to optimize phagocytosis (non-heat-inactivated serum) and allow multiplication of the bacteria (no streptomycin). In order to prevent fungal growth 5.6 µg/ml Amphotericin B and 60 µg/ml penicillin G were added. Mtb-extract was used as source for soluble mycobacterial antigens in a final concentration of 10 µg/ml. These antigens were generated by collecting the ultracentrifuged supernatant of mycobacterial cells that were repeatedly sonicated. Afterwards cell wall components and intracellular antigens were extracted (24 ). Molidustat (BAY 85-3934, Selleckchem) is a HIF-stabilizer (prolyl-hydroxylase inhibitor), which was dissolved in DMSO and serially diluted in PBS.
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2

HIF-1α Modulation in Lung Cells

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Human normal lung epithelial cell line HFL-1, and lung cancer cell lines 95D, A549, PC-9, SPC-A1 and HAC-84 were purchased from Chinese Academy of Science. HFL-1 cells were cultured in F-12K medium containing 10% fetal bovine serum (FBS), other cell lines were maintained in RMPI-1640 medium supplemented with 10% FBS. All cells were incubated at 37°C with 5% CO2.
Molidustat (10 μM; Selleck, China) was used to treat cells for 4h to mimic HIF-1α activation. BAY87-2243 (10 μM; Selleck, China) was used to treat cells for 48h to induce HIF-1 inhibition. Proteasome inhibitor MG132 (25 μM; MedChem Express, China) and protein translation inhibitor puromycin (2 μM; Sigma, USA) were also used to treat cells for indicated time. Then cells were harvested for Western blot or real-time PCR.
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3

Molidustat Restores RBC Indices in Mice

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After 12 weeks of experimental diets, mice received intraperitoneal (i.p.) injections of either vehicle (5% DMSO + 45% PEG300 + 50% ddH2O) or BAY 85–3934 (BAY, Molidustat; SelleckChem [Houston, TX, USA] S8138 resuspended in vehicle) at a human equivalent dose for mice(28 (link)) of 20 mg/kg every other day for 3 weeks. Final red blood cell indices were measured the day of tissue harvest; tissues were harvested 4 hours after the final injection at the end of the 3-week treatment window (15 weeks from experimental diet initiation).
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4

Investigating FGF23 regulation in mice

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8-week-old wild type female mice received intraperitoneal (i.p.) injections of either vehicle (5%DMSO/45%PEG300/50%ddH2O) or 50 mg·kg−1 of FG-4592 (‘FG’, Roxadustat; SelleckChem) or BAY 85-3934 (‘BAY’, Molidustat; SelleckChem) every other day for 5 days (3 injections total). Female flox-Fgf23/Dmp1-cre+ and cre mice (10-11 weeks old) were injected with 70 mg·kg−1 of FG-4592 every other day for 5 days (3 injections total). In all studies, tissues were harvested 4 hours after the final injection.
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5

Comprehensive Compound Sourcing for Metabolic Research

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IOX1,
IOX2, ML324, KDMOAM25, succinate,
fumarate, 2OG, dimethylpyridine-2,4-dicarboxylate, dimethyl 2-oxoglutarate,
dimethyl succinate, dimethyl fumarate, and DMOG were purchased from
Sigma-Aldrich, while IOX3, IOX4, Roxadustat, Vadadustat, Panobinostat,
disodium 2S/2R-hydroxyglutarate, and FG0041 were
obtained from Cayman Chemical Company. 2,4-PDCA (Alfa Aesar), Daprodustat
(MedChemExpress), QC6352 (MedChemExpress), Molidustat (Selleck Chem),
JIB-04 (Tocris Bioscience), GSK-J1 (Tocris Bioscience), GSK-J4 (Tocris
Bioscience), SD70 (Xcess Biosciences), CPI455 (Axon Med Chem), 2′-deoxy-5-methylcytidine
(TCI Chemicals), 2′-deoxy-5-(hydroxymethyl)cytidine (TCI Chemicals),
and (R/S)-Octyl-α-hydroxyglutarate
(Cambridge Bioscience) were purchased from other commercial sources.
All purchased inhibitors were >95% pure as determined by the manufacturer.
Key compound purity was verified using analytical HPLC using a UV
detector (210 or 254 nm) or CAD detector (Figures S18–S28). NOG was synthesized as described in the materials
and methods and has a purity >95% as determined by HPLC. All buffer
components were from Sigma-Aldrich unless otherwise stated.
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6

Stabilizing HIF-1α with Pharmacological Agents

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HIF-1α was stabilized with a variety of drugs: Deferoxamine (DFO, MilliporeSigma, Burlington, MA, USA); Deferasirox (DFX, ChemScene, Monmouth Junction, NJ, USA for in vitro studies, and Novartis, Basel, Switzerland for in vivo studies); BAY 85-3934 (Molidustat, Selleck Chemicals, Houston, TX, USA); and MLN-4924 (Pevonedistat, Adooq Bioscience, Irvine, CA, USA, #A11260). DFO and gemcitabine (Gem, MilliporeSigma) stock solutions were prepared in PBS for in vitro and in vivo studies. DFX, BAY-3934, and MLN-4924 stock solutions were prepared in DMSO for in vitro studies. DFX was prepared in 30% 1,2-propanediol/70% sterile 0.9% sodium chloride solution (v/v) for oral gavage treatment. Ganciclovir (MilliporeSigma) stock solutions were prepared in 0.1 M HCl.
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