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Anti rab7

Manufactured by Merck Group
Sourced in United Kingdom

Anti-Rab7 is a laboratory reagent used for the detection and localization of the Rab7 protein in various cellular and tissue samples. Rab7 is a small GTPase that plays a crucial role in late endosome and lysosome biogenesis and trafficking. Anti-Rab7 can be used in techniques such as Western blotting, immunohistochemistry, and immunocytochemistry to study the expression and distribution of Rab7 in different biological systems.

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9 protocols using anti rab7

1

Age-Dependent Regulation of Vesicular Trafficking Proteins in Entorhinal Cortex

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Mice were anesthetized with ketamine (50 g/kg)/xylazine (5 mg/kg) and brains were rapidly removed over ice. Brains of 12 (n=4) and 24 (n=5) month old mice were snap frozen and stored at −80°C before biochemical analyses. Entorhinal cortices were dissected out from fresh brains of 12 (n=4) and 24 (n=4) month old mice and stored at −80°C. Western blot immunolabeling was performed as previously described52 (link). Primary antibodies used were: anti-LAMP-2 (1:1000), anti-Rab4a (1:1000; Santa Cruz Biotechnology, Santa Cruz, CA; Cat # SC-312), anti-Rab5a (1:1000), anti-Rab7 (1:1000; Sigma, St. Louis, MO; Cat # R8779), anti-Rabaptin5 (1:1000; Santa Cruz Biotechnology, Santa Cruz, CA; Cat # SC-6162), anti-LC3 (1:1000), anti-Cat D (1:1000), C1/6.1 (1:1000)48 (link), anti-mTOR and anti-AKT (phosphorylated and total protein) (1:1000, Cell Signaling Technology, Inc., Danvers, MA; Cat # 2983S and Cat # 9272S respectively), anti-α-synuclein (1:1000; Sigma, St. Louis, MO; Cat # S3062), and anti-β-tubulin (1:10000; Sigma, St. Louis, MO; Cat # T8535). Secondary antibodies used were: HRP conjugated anti-rabbit and mouse antibodies (1:5000; GE Healthcare, Pittsburgh, PA). The protein bands were scanned, optical density was calculated using the Image J, and the ratio of protein intensity to β-tubulin in the same lane was calculated. Western blot analyses were repeated 3 times.
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2

Histological Analysis of Murine Colonic Tissue

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Mice distal colons were sectioned (5 µm) after fixing in 4% paraformaldehyde. For histopathology analysis, sections were stained with hematoxylin and counter stained with eosin. Histological scoring of colon sections was evaluated by a blinded pathologist following these parameters: loss of epithelium (0–3), crypt damage (0–3), depletion of goblet cells (0–3), and inflammatory cell infiltrate (0–3). For immunostaining, human biopsy and mice colon samples were sectioned and after fixing with 4% paraformaldehyde antigen retrieval was performed. The sections were probed with anti-Rab7 (Sigma, R4779, 1:400), UEA1-FITC (Vector Laboratories, FL-1061, 1:400), anti-Muc2 (Santa Cruz, sc-515032, 1:200), and anti-CLCA1 (Abcam, ab180851, 1:100) in blocking (5% goat serum) overnight. Sections were incubated with HRP or fluorophore tagged secondary antibodies for 2 hr. Nucleic acid was stained with DAPI (1 µg/ml). Sections were cured and mounted with Prolong Gold Antifade Reagent (Thermo Fisher). Sections were imaged in confocal microscope (Leica SP8).
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3

Antibody Detection Techniques in Prion Research

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The following mouse antibodies were used: anti-Rab7 (Sigma), anti-Tsg101 (GeneTex), anti-β-actin (Abcam), anti-GM130 (BD Transduction Laboratories) and anti-prion (SAF32, Cayman chemical; AH6, TSE Resource Center,). The following rabbit antibodies were used: anti-Hrs (Novus Biologicals), anti-TGN38 (AbD Serotec), anti-GFP (Abcam), anti-EEA1 (Cell Signaling), anti-Vps26 (a gift from Juan Bonifacino, Cell Biology Metabolism Program, NICHD, NIH, Bethesda, MD), anti-CI-M6PR (a gift from Linton Traub, Department of Cell Biology, University of Pittsburgh, PA) and anti-Alix (Bethyl Laboratories). Rat anti-LAMP1 antibody (Developmental Studies Hybridoma Bank) was used. PrPc and PrPsc were routinely detected using DyL488, Cy3 and DyL647-conjugated secondary antibodies (Jackson ImmunoResearch Laboratories). Western blots were probed using horseradish peroxidase (HRP)-conjugated secondary antibodies (Jackson ImmunoResearch Laboratories) and InfraRed Dye 680 and 800 secondary antibodies (Li-Cor Bioscience).
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4

Multicolor Immunocytochemistry of Intestinal Cells

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Cells were seeded on 18 mm glass coverslips, fixed with 4% methanol-free paraformaldehyde, and blocked in 0.1% BSA + 0.01% TritonX-100 for 1 hr. Cells were probed with anti-CLCA1 (Abcam, ab180851, 1:100), anti-Muc2 (Santa Cruz, sc-515032, 1:200), anti-Rab7 (Sigma, R4779, 1:400), and Phalloidin-594 (Invitrogen, A12381, 1:400) at 4℃ overnight. Cells were further incubated with fluorophore tagged secondary antibodies for 2 hr. Nucleic acid was stained with DAPI (1 µg/ml). Coverslips were mounted with Prolong Gold Antifade Reagent (Thermo Fisher) and visualized in confocal microscope (Leica SP8) for immunocytochemistry and in Elyra PS1 (Carl Zeiss) for structured illumination microscopy.
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5

Protein Expression Analysis Protocol

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Human biopsies and mice organ tissues were homogenized using tissue homogenizer (Precellys) in RIPA buffer with added protease arrest (G Biosciences) to prepare protein lysates. Cells were lysed in RIPA buffer (with protease arrest) after PBS wash. Protein amount was measured by BCA solution (Sigma). Equal amount of protein samples was separated on SDS-PAGE gel (12%) electrophoresis and transferred to nitrocellulose membrane (Bio-Rad). Blots were blocked with 5% skim milk for 1 hr at room temperature and probed with antibodies at 4℃ overnight against the desired proteins. The primary antibodies used were anti-Rab7 (Sigma, R4779, 1:5000), anti-F (Invitrogen, 39-8600, 1:2000), anti-β-actin (Cell Signaling Technology, 4970S, 1:20,000), anti-CLCA1 (Abcam, ab180851, 1:20,000) (Key Resources Table). Specific secondary antibodies conjugated with HRP were probed for 1 hr at room temperature. Blots were detected and visualized for protein bands with Immobilon Forte western HRP substrate (Millipore) and imaged in Image Quant LAS4000. Band intensities were measured using ImageJ software.
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6

Antibody-based Western Blotting Analysis

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For Western blotting the following antibodies were used: anti-Rab7 (R4779, Sigma), anti-prohibitin (II-14-10, Thermofisher Scientific). Rabbit polyclonal antibodies against mouse thiolase were raised against KLH‐conjugated polypeptide KLKPAFKDGGSTTAGN corresponding to the amino acids 259–274 of mouse prethiolase and affinity-purified by SCRUM Inc., Tokyo [29 (link)]. For Western blot analyses, the antibodies were used at concentrations of 2 μg/ml.
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7

Western Blot Analysis of Extracellular Vesicles

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Density gradient fractions were loaded on a 4–20% gradient Tris-Glycine precast polyacrylamide gel (Bio-Rad, Hercules, CA), separated by standard SDS-PAGE procedures and transferred onto PVDF membranes. (Immobilon, EMD Millipore, Billerica, MA). Primary antibodies used in this study were: anti-CD63 (1:1,000, #ab217345, Abcam, Cambridge, UK), anti-Alix (1:1,000, #ABC40, EMD Millipore), anti-TSG101 (1:1,000, #PA5-31260, ThermoFisher Scientific), anti-Rab35 (1:1,000, #9690, Cell Signaling Technology, Danvers, MA), anti-Rab5B (1:5,000, #sc-598, Santa Cruz Biotechnology, Dallas, TX), anti-Rab7 (1:5,000, #R8779, Sigma-Aldrich) and anti-EEA1 (1:1,000, #07-1820, EMD Millipore). The secondary antibodies used were HRP-conjugated anti-rabbit and anti-mouse antibodies from Jackson ImmunoResearch (West Grove, PA, US). The membranes were incubated in chemiluminescent fluid (Pierce, Rockford, IL, US) for 5 min, and chemiluminescence was visualized on Reflection Autoradiography films. Ponceau staining (Sigma-Aldrich) was used as a loading control. Protein bands were quantified through the open source software ImageJ (National Institute of Health (NIH), Bethesda, MD, US). Data are shown as the densitometric ratio between Ts2 and 2N controls, after normalization for protein concentration of each fraction.
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8

Immunofluorescence and ADP-ribosylation Assay

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In this study anti-Rab7 (Sigma), anti-Rab11, and anti-Hsp90 (Abcam), anti-Actin (Santa Cruz), anti-FA (7F2) (Abcam), and anti-EEA1 (Abcam) were used as primary antibodies. Secondary antibody, and fluorescent (TRITC) labeled phalloidin were purchased from Santa Cruz, and Sigma, culture materials from Nunc, and Falcon firms, DTx, and CRM197 from Calbiochem, and ProLong Gold Antifade Mountant Invitrogen firms. For ADP-ribosylation assay [Adenosine-14C]NAD (NEN-Dupont) with a specific activity of 535 Ci/mol was used.
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9

Age-Dependent Regulation of Vesicular Trafficking Proteins in Entorhinal Cortex

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Mice were anesthetized with ketamine (50 g/kg)/xylazine (5 mg/kg) and brains were rapidly removed over ice. Brains of 12 (n=4) and 24 (n=5) month old mice were snap frozen and stored at −80°C before biochemical analyses. Entorhinal cortices were dissected out from fresh brains of 12 (n=4) and 24 (n=4) month old mice and stored at −80°C. Western blot immunolabeling was performed as previously described52 (link). Primary antibodies used were: anti-LAMP-2 (1:1000), anti-Rab4a (1:1000; Santa Cruz Biotechnology, Santa Cruz, CA; Cat # SC-312), anti-Rab5a (1:1000), anti-Rab7 (1:1000; Sigma, St. Louis, MO; Cat # R8779), anti-Rabaptin5 (1:1000; Santa Cruz Biotechnology, Santa Cruz, CA; Cat # SC-6162), anti-LC3 (1:1000), anti-Cat D (1:1000), C1/6.1 (1:1000)48 (link), anti-mTOR and anti-AKT (phosphorylated and total protein) (1:1000, Cell Signaling Technology, Inc., Danvers, MA; Cat # 2983S and Cat # 9272S respectively), anti-α-synuclein (1:1000; Sigma, St. Louis, MO; Cat # S3062), and anti-β-tubulin (1:10000; Sigma, St. Louis, MO; Cat # T8535). Secondary antibodies used were: HRP conjugated anti-rabbit and mouse antibodies (1:5000; GE Healthcare, Pittsburgh, PA). The protein bands were scanned, optical density was calculated using the Image J, and the ratio of protein intensity to β-tubulin in the same lane was calculated. Western blot analyses were repeated 3 times.
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