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Mir 210 mimic

Manufactured by Qiagen
Sourced in United States

The MiR-210 mimic is a synthetic RNA molecule designed to mimic the function of the natural miR-210 microRNA. MicroRNAs are small, non-coding RNA molecules that play a role in regulating gene expression. The MiR-210 mimic is intended for use in research applications to study the functional effects of increased miR-210 expression.

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6 protocols using mir 210 mimic

1

Microglia Activation Modulation Protocol

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Neonatal rat primary microglia isolated from mixed glial cultures were seeded onto poly-l-lysine-pretreated 24-well plates at 2 × 105 cells per well and grown in culture medium for microglia (RPMI 1640 medium supplemented with 10% FCS, 1 mM l-glutamine, 1 mM sodium pyruvate, 0.1 mM nonessential amino acids, 50 mM β-mercaptoethanol, 100 U ml−1 penicillin, and 100 mg ml−1 streptomycin). The cells were allowed to attach overnight. A total of 100 nM of miR-210 mimic (Qiagen), negative mimic (Qiagen), LNA-anti-miR-210 (Exiqon), LNA scramble control (Exiqon), On-Target plus rat SIRT1 siRNA (Dharmacon), or control siRNA (Dharmacon) were used for in vitro transfection. Primary microglia transfection was performed with HiPerfect transfection reagent (Qiagen) according to the manufacturer’s instructions. For microglia M1 activation, cells were recovered overnight after 6 h transfection and then stimulated by adding LPS (0.5 ng/ml, Sigma) and IFN-γ (0.1 ng/ml, PeproTech). At the desired time points, microglia were collected for analysis.
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2

Investigating Microglial Response to LPS

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BV2 mouse microglia cell line was provided by Dr. Grace Y. Sun (University of Missouri). BV2 cells retain many morphological and functional properties of primary microglia [17 (link)]. Cells were cultured in Dulbecco’s modified Eagle’s medium (DMEM; Hyclone Co.) with 10 % fetal bovine serum (FBS; Hyclone Co.), 2 mM L-glutamine, 100 U/ml penicillin, and 100 μg/ml streptomycin (Sigma) in a humidified incubator at 37 °C with 5% CO2. To determine the effect of liposaccharide (LPS, Sigma) concentration on microglia stimulation, BV2 cells with 80–90% confluency were incubated with multiple doses (0, 10, 100, or 500 ng/ml) of LPS for 6 h. A total of 100 nM of miR-210 mimic, negative mimic (Qiagen), miR-210-LNA, LNA scramble control (Exiqon), TET2 siRNAs (si. Tet2), or control siRNA (si. Ctrl, Dharmacon) were used for in vitro transfection. Transfection was performed with HiPerfect transfection reagent (Qiagen) according to the manufacturer’s instructions. BV2 cells were starved in serum-free medium for 2 h before transfection. At 24 h after transfection, cells were stimulated with or without LPS (1 or 500 ng/ml) for 6 h and then collected for assays.
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3

Modulating miR-210 in Primary Neurons

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Primary cortical neurons at DIV 5 were transfected with miR-210 mimic (100 nM; Qiagen) or the pool of Stealth ISCU siRNAs (100 nM; Fisher Scientific) using Lipofectamine 2000 (11668027, Invitrogen) in Neurobasal medium (Invitrogen) according to the manufacturer’s instructions. The same amount of miR-210 ALLStars negative control or siRNA control with matching GC content was used as negative controls. All experiments were performed 48–72 h after transfection. To test the effect of miR-210 inhibition during OGD, either miR-210-LNA (Exiqon) or LNA scramble control (Exiqon) was transfected 24 h prior to exposure to OGD.
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4

Rat Microglia miR-210 Regulation of SIRT1

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Immortalized rat microglia (Applied Biological Materials) were seeded onto collagen I-pretreated 6-well plates (Thermo Fisher) at 6 × 105 cells per well and transfected with 100 nM of either miR-210 mimic (Qiagen) or negative mimic (Qiagen) by using HiPerfect transfection reagent (Qiagen) according to the manufacturer’s instructions. Cells were harvested 24 h after transfection and washed in ice-cold PBS followed by complete lysis buffer (Active Motif) at 4 °C for 10 min. RISC-IP of the lysate was conducted using the miRNA Target IP Kit (Active Motif) following the manufacturers’ instructions. The RNA was extracted with phenol/chloroform/isoamyl alcohol (25:24:1, Fisher Scientific) once, chloroform once and precipitated and resuspended in RNase-free water. The precipitated RNA was subjected to RT-qPCR using primers specific for the rat SIRT1 3′UTR. β-actin was used as an internal control. The relative abundance of SIRT1 transcript pulled down by Ago1/2/3 antibody was calculated by the 2−ΔΔCT method and is presented as the fold induction relative to the control. Primers are presented in Supplementary Table 1.
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5

Transfection of miR-210 in Cells

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Tissue transfection was conducted as described previously.6 , 48 (link) Briefly, the mixtures of miR-210 mimic (Qiagen), miR-210-LNA (Qiagen), or AllStars negative controls (Qiagen), with HiPerfect transfection reagent (Qiagen) and Opti-MEM 1 (ThermoFisher) were prepared and incubated for ~30 minutes at room temperature. The mixtures were subsequently added to DMEM containing 1% charcoal-stripped fetal bovine serum in a 6-well plate (final concentration of 100 nmol/L) maintained in an incubator at 37 °C for 48 hours.
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6

Mitochondrial ROS Detection Assay

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Euthasol® (pentobarbital sodium and phenytoin sodium) was obtained from (Virbac Corporation, Westlake, TX, USA). The mitochondrial ROS Detection Assay Kit and mitoquinone mesylate (MitoQ) were obtained from Cayman Chemical Company (Ann Arbor, MI, USA). Oligomycin, carbonyl cyanide‐4(trifluoromethoxy) phenylhydrazone (FCCP) and rotenone/antimycin A were obtained from Sigma‐Aldrich (St. Louis, MO, USA). Dulbecco's modified Eagle's medium (DMEM), Fluo‐4 AM, phenol, chloroform and isoamyl alcohol were obtained from Fisher Scientific (Waltham, MA, USA). Antibodies sc‐28860 and sc‐373694 were obtained from Santa Cruz (Dallas, TX, USA). miR‐210 mimic, AllStarsNegative Control siRNA, and HiPerfect transfection reagent were obtained from Qiagen (Germantown, MD, USA).
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