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3 protocols using ab126820

1

Fluorescence Labeling and Protein Quantification

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Alexa Fluor™ 594-labeled phalloidin (A12381) and Pierce™ BCA Protein Assay Kit (23227) were purchased from Thermo Fisher Scientific, China. 4′,6-Diamidino-2-phenylindole dihydrochloride (DAPI, D9542), PKH67 Green Fluorescent Cell Linker Kit for General Cell Membrane Labeling (MINI67-1KT), lipopolysaccharide (LPS, Escherichia coli 0111: B4, L4391), β‐glycerophosphate (G9422), L‐ascorbic acid 2‐phosphate (49752), and dexamethasone (D1756) were from Sigma, China. Antibodies used in this study were rabbit polyclonal antibody against alkaline phosphatase (ALP) (ab126820; Abcam, China) and CD81 antibody (B-11) (sc-166029; Santa Cruz Biotechnology, China).
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2

Immunofluorescence staining of cultured cells

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Cultured cell samples were carefully rinsed with PBS (Gibco, 21600-10), fixed with formalin solution (Sigma-Aldrich, HT5011, Madrid, Spain) for 20 min at room temperature, and rinsed again twice with PBS. The aldehyde groups were blocked with ammonium chloride (Sigma-Aldrich, A9434) 50 mM in PBS for 20 min. The samples were permeabilized with saponin (Sigma-Aldrich, 47036) 0.1% m/v in bovine serum albumin (BSA) (Sigma-Aldrich, A3059) 1% m/v in PBS for 10 min.
The samples were stained with the corresponding primary antibodies against paxillin (Abcam, ab32084, Cambridge, United Kingdom), scleraxis (Abcam, ab58655), collagen I (Abcam, ab90395), osterix (Abcam, ab22552), and alkaline phosphatase (Abcam, ab126820) in BSA 1% m/v PBS for 2 h at room temperature, then with the corresponding secondary fluorophore-conjugated antibodies anti-rabbit Alexa 568 (LifeTech, A11036, Madrid, Spain) and anti-mouse Alexa 488 (LifeTech, A10667) in BSA 1% m/v in PBS for 2 h. CytoPainter 488 (Abcam, ab176753) and Hoechst 33342 (Invitrogen, H3570) were used for actin filaments and cell nuclei staining. The samples were mounted with coverslips in fluoromount mounting medium (Sigma-Aldrich, HT5011).
The samples were imaged at a Nikon E600 upright manual microscope with a 40X/0.75 NA objective and an Olympus DP72 color digital camera. At least three representative images were taken of each sample.
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3

Histological Tissue Processing and Staining

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The fixed constructs (after formalin fixation as mentioned above) were subjected to standard histological tissue processing for paraffin embedding (EC350-2, Microm, Thermo Scientific, Waltham, MA, USA). Sections of 5 μm thickness were obtained using a microtome (HM355S, Microm, Thermo scientific). The sections were stained with hematoxylin-eosin (H&E) (05-12011/L, 05-M10003, Bio-optica) following a standard protocol and using an automatic stainer equipment (HMS740, Microm, Thermo Scientific).
For collagen, the sections were stained with Masson Trichrome (with aniline blue) assay kit (04-010802, Bio-Optica Milano S.p.A.) following manufacture's protocol.
For IHC, mouse IgG monoclonal antibody for Alkaline Phosphatase (ab126820, Abcam, UK, at 1:100 dilution) was used. Detection was done by using Alexa Fluor® 488 donkey anti-mouse IgG (A21202, Invitrogen, CA, at 1: 500 dilution) and counterstained with DAPI.
All sections after staining were dehydrated and mounted with Entellan® (4111, Inopat) before being observed under a transmitted and reflected light microscope (Leica DM750, Germany) with an MRc5 camera.
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