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3 protocols using ficoll paque premium 1.077 g ml

1

Isolation and Purification of Monocytes from Peripheral Blood

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De-identified peripheral blood samples (Leukopaks) were obtained from healthy adult male donors at the Gulf Coast Regional Blood Center (Houston, TX, USA). The work was conducted with approval from Rice University’s IRB. The anticoagulated blood was obtained at room temperature, no longer than 24 hours after draw, and immediately processed for isolation of peripheral blood mononuclear cells (PBMCs) by density gradient centrifugation using Ficoll-Paque Premium 1.077 g/mL (GE Healthcare, IL; 17544202) according to the manufacturer’s instructions. PBMCs were either processed for sorting of monocytes or frozen (5 x 107 cells/mL) in complete RPMI with 5% (v/v) dimethyl sulfoxide. Monocytes were sorted from PBMCs via magnetically-activated cell sorting (MACS) through negative selection, using the Pan Monocyte Isolation Kit (Miltenyi Biotec, Germany; 130-096-537) and autoMACS Separator Pro or MiniMACS separator (Miltenyi Biotec), following manufacturer’s instructions.
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2

Synthesis and Characterization of Nanoparticles

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All reagents and materials were purchased from Sigma-Aldrich (Milwaukee, WI, USA) and were used as received unless noted otherwise. Hydrochloric acid (HCl, 1 N) was purchased from Fisher Scientific (Fair Lawn, NJ, USA), and silica from VWR (Radnor, PA, USA). The confined impinging jet mixer was provided by Prof. Robert Prud’homme at Princeton University (Princeton, NJ, USA). Cell culture assays used human buffy coats purchased from the New York Blood Center (New York, NY, USA) or New Jersey Blood Center (East Orange, NJ, USA), Ficoll-Paque premium 1.077 g/mL and Percoll 1.3 g/mL from GE Healthcare (Fairfield, CT, USA), FEP Teflon cell culture bags from Cellgenix, RPMI-1640 from ATCC (Manassas, VA, USA), macrophage colony stimulating factor (MCSF) from PeproTech (Rocky Hill, NJ, USA), penicillin/streptomycin from Lonza (Basel, Switzerland), fetal bovine serum (FBS) from Life Technologies (Carlsbad, CA, USA), human serum from MP Biomedical, unlabeled oxLDL from Biomedical Technologies Inc. (Ward Hill, MA, USA), and 3,3′-dioctadecyloxacarbocyanine (DiO) labeled oxLDL from Kalen Biomedical (Montgomery Village, MD, USA).
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3

Optimized Macrophage Foam Cell Assay

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All reagents and solvents
were purchased from Sigma-Aldrich (Milwaukee, WI) and used as received
unless otherwise noted. Hydrochloric acid (HCl, 1 N), dibenzyl tartrate
(DBT), and polytetrafluoroethylene (PTFE) syringe filters were purchased
from Fisher Scientific (Fair Lawn, NJ). Silica gel was purchased from
VWR (Radnor, PA). Monomethoxy-poly(ethylene glycol)-amine (mPEG-amine)
was purchased from Laysan Bio (Arab, AL) and azeotropically distilled
with toluene prior to use. Reagents for cell culture, toxicity studies,
and oxLDL uptake studies include human buffy coats purchased from
The Blood Center of New Jersey (East Orange, NJ), Ficoll-Paque premium
1.077 g/mL purchased from GE Healthcare (Fairfield, CT), RPMI-1640
purchased from ATCC (Manassas, VA), macrophage colony stimulating
factor purchased from PeproTech (Rocky Hill, NJ), penicillin/streptomycin
purchased from Lonza (Basel, Switzerland), alamarBlue assay, fetal
bovine serum, and Hoechst 33342 purchased from Life Technologies (Carlsbad,
CA), unlabeled oxLDL purchased from Biomedical Technologies Inc. (Ward
Hill, MA), and 3,3′-dioctadecyloxacarbocyanine (DiO) labeled
oxLDL purchased from Kalen Biomedical (Montgomery Village, MD).
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