Fiche technique

Description biologique

Spécificité	A1/Bfl-1 Antibody [D21F14] reconnaît les niveaux endogènes de la protéine A1/Bfl-1 totale.
Contexte	La protéine A1 apparentée à Bcl-2 (également connue sous le nom de Bfl-1 ou BCL2A1) est un membre anti-apoptotique de la famille Bcl-2. Son expression est principalement trouvée dans les cellules hématopoïétiques, bien qu'elle ait également été détectée dans des tissus non hématopoïétiques tels que le poumon et dans les cellules endothéliales. A1/Bfl-1 est rapidement régulé à la hausse par l'activation de NF-κB en réponse à divers stimuli, y compris le TNF-α, l'IL-1β, la liaison CD40, les esters de phorbol et le LPS. A1/Bfl-1 inhibe l'apoptose en se liant et en neutralisant les membres pro-apoptotiques de la famille Bcl-2, tels que Bid et Bim, empêchant ainsi la libération du cytochrome c des mitochondries. Fait intéressant, dans des conditions spécifiques impliquant une stimulation par le TNF et un traitement au cycloheximide dans les cellules pro-B FL5.12, A1/Bfl-1 humain peut être clivé protéolytiquement par la μ-calpaïne ou une protéase similaire, le convertissant en un facteur pro-apoptotique. A1/Bfl-1 a été impliqué dans l'auto-immunité, ainsi que dans la progression et la résistance thérapeutique des tumeurs hématologiques et solides où son expression peut être dérégulée. Au-delà de son rôle dans l'apoptose, A1/Bfl-1, comme d'autres protéines anti-apoptotiques telles que Bcl-2, Mcl-1 et Bcl-xL, peut se lier à Beclin1. Cette interaction inhibe l'autophagie, potentiellement en perturbant la formation de complexes Beclin1-hVps34.

Spécificité

A1/Bfl-1 Antibody [D21F14] reconnaît les niveaux endogènes de la protéine A1/Bfl-1 totale.

Contexte

La protéine A1 apparentée à Bcl-2 (également connue sous le nom de Bfl-1 ou BCL2A1) est un membre anti-apoptotique de la famille Bcl-2. Son expression est principalement trouvée dans les cellules hématopoïétiques, bien qu'elle ait également été détectée dans des tissus non hématopoïétiques tels que le poumon et dans les cellules endothéliales. A1/Bfl-1 est rapidement régulé à la hausse par l'activation de NF-κB en réponse à divers stimuli, y compris le TNF-α, l'IL-1β, la liaison CD40, les esters de phorbol et le LPS. A1/Bfl-1 inhibe l'apoptose en se liant et en neutralisant les membres pro-apoptotiques de la famille Bcl-2, tels que Bid et Bim, empêchant ainsi la libération du cytochrome c des mitochondries. Fait intéressant, dans des conditions spécifiques impliquant une stimulation par le TNF et un traitement au cycloheximide dans les cellules pro-B FL5.12, A1/Bfl-1 humain peut être clivé protéolytiquement par la μ-calpaïne ou une protéase similaire, le convertissant en un facteur pro-apoptotique. A1/Bfl-1 a été impliqué dans l'auto-immunité, ainsi que dans la progression et la résistance thérapeutique des tumeurs hématologiques et solides où son expression peut être dérégulée. Au-delà de son rôle dans l'apoptose, A1/Bfl-1, comme d'autres protéines anti-apoptotiques telles que Bcl-2, Mcl-1 et Bcl-xL, peut se lier à Beclin1. Cette interaction inhibe l'autophagie, potentiellement en perturbant la formation de complexes Beclin1-hVps34.

Informations dutilisation

Application

WB, IP

Dilution

WB	IP
1:1000	1:200

Réactivité

Human

Source

Rabbit Monoclonal Antibody

MW

18 kDa

Tampon de stockage

PBS, pH 7.2+50% Glycerol+0.05% BSA+0.01% NaN₃

Stockage
(À partir de la date de réception)

-20°C (avoid freeze-thaw cycles), 2 years

Méthodes expérimentales
WB	Experimental Protocol: Sample preparation 1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature or lyse it by sonication on ice, then incubate on ice for 30 minutes. 2. Adherent cell: Aspirate the culture medium and transfer the cells into an EP tube. Wash the cells with ice-cold PBS twice. Add an appropriate volume of RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes. 3. Suspension cell: Transfer the culture medium to a pre-cooled centrifuge tube. Centrifuge and aspirate the supernatant. Wash the cells with ice-cold PBS twice.Add an appropriate volume of RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes. 4. Place the lysate into a pre-cooled microcentrifuge tube. Centrifuge at 4°C for 15 min. Collect the supernatant; 5. Remove a small volume of lysate to determine the protein concentration; 6. Combine the lysate with protein loading buffer. Boil 20 µL sample under 95-100°C for 5 min. Centrifuge for 5 min after cool down on ice. Electrophoretic separation 1. According to the concentration of extracted protein, load appropriate amount of protein sample and marker onto SDS-PAGE gels for electrophoresis. Recommended separating gel (lower gel) concentration: 10%. Reference Table for Selecting SDS-PAGE Separation Gel Concentrations 2. Power up 80V for 30 minutes. Then the power supply is adjusted (110 V~150 V), the Marker is observed, and the electrophoresis can be stopped when the indicator band of the predyed protein Marker where the protein is located is properly separated. (Note that the current should not be too large when electrophoresis, too large current (more than 150 mA) will cause the temperature to rise, affecting the result of running glue. If high currents cannot be avoided, an ice bath can be used to cool the bath.) Transfer membrane 1. Take out the converter, soak the clip and consumables in the pre-cooled converter; 2. Activate PVDF membrane with methanol for 1 min and rinse with transfer buffer; 3. Install it in the order of "black edge of clip - sponge - filter paper - filter paper - glue -PVDF membrane - filter paper - filter paper - sponge - white edge of clip"; 4. The protein was electrotransferred to PVDF membrane. ( 0.22 µm PVDF membrane is recommended )） Reference Table for Selecting PVDF Membrane Pore Size Specifications Recommended conditions for wet transfer: 200 mA, 60 min. ( Note that the transfer conditions can be adjusted according to the protein size. For high-molecular-weight proteins, a higher current and longer transfer time are recommended. However, ensure that the transfer tank remains at a low temperature to prevent gel melting.) Block 1. After electrotransfer, wash the film with TBST at room temperature for 5 minutes; 2. Incubate the film in the blocking solution for 1 hour at room temperature; 3. Wash the film with TBST for 3 times, 5 minutes each time. Antibody incubation 1. Use 5% skim milk powder to prepare the primary antibody working liquid (recommended dilution ratio for primary antibody 1:1000), gently shake and incubate with the film at 4°C overnight; 2. Wash the film with TBST 3 times, 5 minutes each time; 3. Add the secondary antibody to the blocking solution and incubate with the film gently at room temperature for 1 hour; 4. After incubation, wash the film with TBST 3 times for 5 minutes each time. Antibody staining 1173. Add the prepared ECL luminescent substrate (or select other color developing substrate according to the second antibody) and mix evenly; 2. Incubate with the film for 1 minute, remove excess substrate (keep the film moist), wrap with plastic film, and expose in the imaging system.

Méthodes expérimentales

WB

Experimental Protocol:

Sample preparation

1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature or lyse it by sonication on ice, then incubate on ice for 30 minutes.

2. Adherent cell: Aspirate the culture medium and transfer the cells into an EP tube. Wash the cells with ice-cold PBS twice. Add an appropriate volume of RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes.

3. Suspension cell: Transfer the culture medium to a pre-cooled centrifuge tube. Centrifuge and aspirate the supernatant. Wash the cells with ice-cold PBS twice.Add an appropriate volume of RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes.

4. Place the lysate into a pre-cooled microcentrifuge tube. Centrifuge at 4°C for 15 min. Collect the supernatant;

5. Remove a small volume of lysate to determine the protein concentration;

6. Combine the lysate with protein loading buffer. Boil 20 µL sample under 95-100°C for 5 min. Centrifuge for 5 min after cool down on ice.

Electrophoretic separation

1. According to the concentration of extracted protein, load appropriate amount of protein sample and marker onto SDS-PAGE gels for electrophoresis. Recommended separating gel (lower gel) concentration: 10%. Reference Table for Selecting SDS-PAGE Separation Gel Concentrations

2. Power up 80V for 30 minutes. Then the power supply is adjusted (110 V~150 V), the Marker is observed, and the electrophoresis can be stopped when the indicator band of the predyed protein Marker where the protein is located is properly separated. (Note that the current should not be too large when electrophoresis, too large current (more than 150 mA) will cause the temperature to rise, affecting the result of running glue. If high currents cannot be avoided, an ice bath can be used to cool the bath.)

Transfer membrane

1. Take out the converter, soak the clip and consumables in the pre-cooled converter;

2. Activate PVDF membrane with methanol for 1 min and rinse with transfer buffer;

3. Install it in the order of "black edge of clip - sponge - filter paper - filter paper - glue -PVDF membrane - filter paper - filter paper - sponge - white edge of clip";

4. The protein was electrotransferred to PVDF membrane. ( 0.22 µm PVDF membrane is recommended )） Reference Table for Selecting PVDF Membrane Pore Size Specifications

Recommended conditions for wet transfer: 200 mA, 60 min.

( Note that the transfer conditions can be adjusted according to the protein size. For high-molecular-weight proteins, a higher current and longer transfer time are recommended. However, ensure that the transfer tank remains at a low temperature to prevent gel melting.)

Block

1. After electrotransfer, wash the film with TBST at room temperature for 5 minutes;

2. Incubate the film in the blocking solution for 1 hour at room temperature;

3. Wash the film with TBST for 3 times, 5 minutes each time.

Antibody incubation

1. Use 5% skim milk powder to prepare the primary antibody working liquid (recommended dilution ratio for primary antibody 1:1000), gently shake and incubate with the film at 4°C overnight;

2. Wash the film with TBST 3 times, 5 minutes each time;

3. Add the secondary antibody to the blocking solution and incubate with the film gently at room temperature for 1 hour;

4. After incubation, wash the film with TBST 3 times for 5 minutes each time.

Antibody staining

1173. Add the prepared ECL luminescent substrate (or select other color developing substrate according to the second antibody) and mix evenly;

2. Incubate with the film for 1 minute, remove excess substrate (keep the film moist), wrap with plastic film, and expose in the imaging system.

Références

https://pubmed.ncbi.nlm.nih.gov/22342458/

Données dapplication

WB

Validé par Selleck

Lane 1: REC-1
Lane 2: SU-DHL-1
Lane 3: SK-MEL-30