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6 protocols using b 005000 100

1

Silencing Tet1 in Hypothalamic Neurons

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siRNA experiments were conducted using Accell SMARTpool siRNA, which targets 4 portions of the Tet1 mRNA transcript (CUAUUUGUCUAUUAUGUGUG, UCGUUGGGUCUAAAGGCUU, UCGCUAAACUAACUAUAAAUGUAU, UUAUAGUUUUAAAUACUUA). A non-targeting siRNA pool was used as a negative control (UGGUUUACAUGUCGACUAA, UGGUUUACAUGUUUUCUGA,UGGUUUACAUGUUUUCCUA, UGGUUUACAUGUUGUGUGA). All siRNAs were resuspended in 5x siRNA buffer diluted in RNase free water. GT1-7 hypothalamic neurons were seeded in 24-well plates in DMEM and FBS with 1% penicillin/streptomycin. Growth medium was removed and replaced with Accell delivery media (Dharmacon, B-005000-100) with 1 μM Tet1 siRNA (Dharmacon, E-06861-00-0020) or non-targeting control (Dharmacon, D-001910-20-20). After 3 days, cells were collected for RNA as described previously.
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2

Th17 Differentiation with IL-24 Knockdown

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Naive T cells purified from wild-type mice (by MACS) were differentiated into Th17 cells in reduced-serum medium (siRNA delivery medium; B005000-100; Dharmacon). On day 1, cells were treated with Accell siRNA oligos targeting IL-24 (1 µm, E-050687-00-0005; Dharmacon) or control oligos (1 µm, D-001910-01-05; Dharmacon). On day 3, cells were analyzed for intracellular IL-10 and IL-17A.
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3

Immortalized KC Cell Line Cytokine Treatment

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N/TERTs, an immortalized KC cell line (Dickson et al., 2000 (link)), was grown in Keratinocyte-serum-free medium (17005-042, Thermo Fisher Scientific, Waltham, MA) supplemented with 30 μg/ml bovine pituitary extract, 0.2 ng/ml EGF, and 0.3 mM calcium chloride. Cells at proper confluency were subsequently treated with recombinant human IL-1β (10 ng/ml, R&D Systems, Minneapolis, MN), IL-36γ (10 ng/ml, R&D Systems), and TNF (10 ng/ml, R&D Systems) for the indicated time before RNA or protein extraction.
siRNA targeting IRAKs, including IRAK2 (Accell Human IRAK2 siRNA, E-004761-00-0010), IRAK1 (E-004760-00-0010), and IRAK4 (E-003302-00-0010); ZNF750 (E-014417-00-0010); IL1R (E-005188-00-0005); MYD88 (E-004769-00-0005); and control siRNA (D-001910-01-20) were purchased from Dharmacon company (Lafayette, CO) and introduced into cells by Delivery medium (B-005000-100, Dharmacon) according to the manufacturer’s instructions.
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4

Human iPSC-Derived Retinal and Brain Tissue Analysis

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Human cortical and retinal tissues were induced from human iPS cells as described previously 35 . iPSderived embryoid bodies with optic vesicles, which are primordia of the brain and retina, were adhered to 24-well plates 22 days after the start of neuronal differentiation. After 48 h, culture medium was replaced with Accell siRNA delivery media (Dharmacon B-005000-100) containing 100 µM Accell Human siRNA (Dharmacon C7orf26, E-016351-00-0005; Non-targeting, D-001910-01) and then cultured for 3 days.
Retinal and brain tissues were dissected from colonies for subsequent qRT-PCR analysis.
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5

siRNA-Mediated Knockdown of β-Arrestin 1 in Mouse Islets

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For β-arrestin 1 (Barr1) siRNA studies, CAMPER primary mouse islets were dispersed by trituration in 0.05% trypsin/EDTA for 3 min at 37°C and seeded at the center of poly-d-lysine–coated glass-bottom dishes. Dispersed islets were allowed to recover overnight before treatment with Accell mouse Arrb1 (109689) siRNA-SMARTpool (E-040976-00-0005, Horizon Discovery) or nontargeting control siRNA (D-001910-01-05, Horizon Discovery) according to the manufacturer’s instructions using the recommended siRNA buffer (B-002000-UB-100, Horizon Discovery) and serum-free delivery medium (B-005000-100, Horizon Discovery). Studies took place 72 hours after siRNA treatment addition.
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6

CD22 Knockdown Using Accell siRNAs

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Accell siRNAs against human CD22 (set of 4) were synthesized by Dharmacon (Horizon Discovery, EQ-019501-00-0002). 5× siRNA buffer (Horizon Discovery, B-002000-UB-100) combined with sterile RNase-free water was used to prepare 1× siRNA buffer. Lyophilized siRNA was reconstituted to 100 μM siRNA solution in 1× siRNA buffer. According to the manufacturer’s experimental conditions, siRNA medium was prepared by adding 1 μM siRNA solution to 1× Accell delivery medium (Horizon Discovery, B-005000-100). Finally, cells were incubated either with siRNA medium or Accell delivery medium alone at 37°C with 5% CO2 for 96 h.
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