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3 protocols using anti epcam ab71916

1

Elvitegravir Formulation and Characterization

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Elvitegravir was provided by Gilead Sciences (Foster City, CA) via CONRAD (Arlington, VA). PLA-HPG was synthesized as previously described [25 (link)]. IR-780 iodide, glycerol, NaIO4, Na2SO3, bovine serum albumin (BSA), lactic acid, acetic acid, mucin, urea, glucose, Tween 80, Solutol (Kolliphor) HS 15, and HPLC-grade formic acid were obtained from Sigma-Aldrich. The 4-(4-(dihexadecylamino)styryl)-N-methylpyridinium iodide salt (DiA) and 4,6-diamidino-2 phenylindole (DAPI) stain were ordered from Invitrogen. Antibody stains anti-CD45 (ab10558) and anti-EpCAM (ab71916) and corresponding isotype controls for flow cytometry were purchased from Abcam. HPLC grade acetonitrile and water were purchased from VWR (J.T. Baker).
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2

Isolation of Gallbladder Epithelial Cells

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Gallbladder tissue was washed with ice-cold PBS at least five times. Any remaining mucus
gel was removed using forceps. To isolate epithelial cells, gallbladder samples were
digested with 0.25% w/v trypsin (Fujifilm Wako, Osaka, Japan) or 2,000 U/mL of dispase
(Goudou Shusei, Tokyo, Japan) at 37°C for 45 min. After inactivation of trypsin or dispase
by adding 10% fetal bovine serum, cells were collected by centrifugation at 1,500 rpm for
5 min. After another wash with PBS, the pelleted cells were stored at −80°C until
utilized. Cell viability was confirmed to be greater than 95% as assessed by the trypan
blue exclusion test. Additionally, the epithelial cells percentages assessed by
immunocytochemistry (anti-EpCAM, ab71916, Abcam, Cambridge, UK) in six of twenty samples
ranged from 92% to 98%.
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3

Immunohistochemistry of Embryonic Tissues

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E10.5 embryos were fixed in 4% paraformaldehyde (PFA) at 4°C overnight and then orientated in 2% low-melting-point agarose in PBS. E17.5 embryo heads were fixed similarly then processed without agarose orientation. Samples were processed using a Leica ASP300S and embedded into paraffin. Embryo heads were sectioned in a coronal orientation, while E10.5 embryos were sectioned in a transverse or coronal orientation. Five-micrometre sections were cut onto Superfrost plus slides, and immunohistochemistry was performed using standard 3,3′-diaminobenzidine (DAB) protocols. The antibodies used were anti-E-cadherin (3195, batch 02/2017, Cell Signaling Technology; 1:100), anti-vimentin (5741S, batch 04/2017, Cell Signaling Technology; 1:100) and anti-Epcam (ab71916, batch GR231753-3, Abcam; 1:1200). Validation profiles for these antibodies are available on the supplier websites. H&E staining was performed using standard protocols. Immunohistochemical staining was quantified with ImageJ software using image deconvolution and a mask for DAB-positive areas.
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