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3 kda mw cut off filter units

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The 3-kDa MW cut-off filter units are a type of laboratory equipment used for the separation and concentration of molecules based on their molecular weight. These filter units have a molecular weight cut-off of 3 kilodaltons, which means they can effectively retain molecules with a molecular weight greater than 3 kDa while allowing smaller molecules to pass through the filter.

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4 protocols using 3 kda mw cut off filter units

1

Hepatocyte and Leukemia Cell Culture Protocols

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Human hepatoma cells (HepG2) were maintained in DMEM supplemented with 10% fetal bovine serum (FBS, Hyclone). Human T-cell leukemia cells (Jurkat) were maintained in RPMI-1640 supplemented with 10% FBS. Primary hepatocytes were isolated and cultured as previously described (Fan et al., 2020 (link)). Mouse Npnt promoter-luciferase constructs (Lanthier et al., 2011 (link)) and BRG1 expression constructs have been previously described (Chen et al., 2020c (link); Li et al., 2020a,b (link), c (link)). Small interfering RNAs were purchased from Dharmacon. Transient transfections were performed with Lipofectamine 2000. Luciferase activities were assayed 24–48 h after transfection using a luciferase reporter assay system (Promega) as previously described (Wu et al., 2020 (link); Yang et al., 2020a,b (link)). For conditioned media (CM) collection, the cells were switched to and incubated with serum-free media overnight. The next day, the media were collected, centrifuged at 4000 × g for 30 min at 4°C using 3-kDa MW cut-off filter units (Millipore) and sterilized through a 0.4-μm filter.
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2

Endothelial Cell Characterization Protocol

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Immortalized human endothelial cells (EAhy926, ATCC), mouse macrophage-like cells (RAW264.7, ATCC), and HEK293 cells were maintained in DMEM supplemented with 10% fetal bovine serum (FBS, Hyclone). Angiotensin II was purchased from Sigma. MRP8 promoter-luciferase constructs (Grebhardt et al., 2012 (link)) and BRG1 expression constructs (Li et al., 2019a (link)) have been previously described. Small interfering RNAs were purchased from Dharmacon. PFI-3 was purchased from Selleck. Transient transfections were performed with Lipofectamine 2000. Luciferase activities were assayed 24–48 h after transfection using a luciferase reporter assay system (Promega) as previously described (Li et al., 2019c (link)). For conditioned media (CM) collection, the cells were switched to and incubated with serum-free media overnight. The next day, the media were collected, centrifuged at 4000 × g for 30 min at 4°C using 3-kDa MW cut-off filter units (Millipore) and sterilized through a 0.4-μm filter.
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3

Endothelial Progenitor Cell Conditioned Medium Protocol

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EPCs were cultured as described in a previous report with slight modification (Brunt et al., 2007). Bone marrow mononuclear cells were isolated from the bone marrow of 4-week-old female Sprague-Dawley rats by density gradient centrifugation, and these cells were incubated on culture dishes coated with fibronectin in endothelial cell growth medium (Lonza, MD, USA). To produce EPC-CM, EPCs were cultured for 48 hours under hypoxic conditions (1.5% O2, 5% CO2, 93.5% N2) in serum and growth factor-free endothelial cell basal medium (Lonza, MD, USA). The conditioned medium was collected and centrifuged at 4000 ×g for 30 minutes at 4°C using 3-kDa MW cut-off filter units (Millipore, Bedford, MA, USA), and then sterilized through a 0.4-µm filter. This concentrated medium (i.e., the EPC-CM) was stored at −80°C until use. Growth factor and serum-free endothelial cell basal medium served as control medium (Con-M).
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4

Conditioned Media Collection Protocol

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Human hepatoma cells (HepG2) and mouse macrophage-like cells (RAW264.7) were maintained in DMEM supplemented with 10 % fetal bovine serum (FBS, Hyclone). Primary hepatocytes were isolated and cultured as previously described [44 (link)]. Human CCL7 promoter-luciferase constructs [45 (link)] and BRG1 expression constructs [46 (link)] have been previously described. Small interfering RNAs were purchased from Dharmacon. Transient transfections were performed with Lipofectamine 2000. Luciferase activities were assayed 24–48 h after transfection using a luciferase reporter assay system (Promega) as previously described [[47] (link), [48] (link), [49] (link), [50] (link)]. For conditioned media (CM) collection, the cells were switched to and incubated with serum-free media overnight. The next day, the media were collected, centrifuged at 4000×g for 30min at 4 °C using 3-kDa MW cut-off filter units (Millipore) and sterilized through a 0.4-μm filter.
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