Figure: Immunohistochemical analysis of paraffin embedded Human breast tissue. 1: CD20 Monoclonal Antibody(2F4) was diluted at 1:200 (4 degree Celsius,overnight). 2: Sodium citrate pH 6.0 was used for antibody retrieval (>98 degree Celsius,20min). 3: Secondary antibody was diluted at 1:200 (room temperature, 30min). Negative control was used by secondary antibody only. Report Number 96950-a Host Mouse Application IHC-P Clonality Monoclonal Model Number STJ96950 Clone ID 2F4 Antibody Name Anti-CD20 antibody Testing Species HUMAN Testing Tissue BREAST ANTIBODY VALIDATION REPORT (A small amount of distilled water was added into the incubation box to prevent evaporation of antibody). Secondary antibody incubation Slides were washed 3 times, with PBS on a shaker for 5min. Shortly after the slides were dried the corresponding secondary antibody solution was added (HRP labelled), covering the tissues, and incubated at room temperature for 30min. DAB staining Slides were washed 3 times, with PBS on a shaker for 5min. Shortly after, the slides were dried and fresh DAB staining buffer was added inside the circles. The staining time was adjusted under a microscope. Yellow-brown colour represented a positive result. Slides were washed with water to stop the staining. Haematoxylin staining Haematoxylin was used to counter-staining for 1min, and then the slides were washed with water. 1% Hydrochloric acid and alcohol was added for several seconds and then washed with water. Ammonia was used to reveal blue colour, and then flushed with water. Desolation and Clearing Slides were incubated sequentially into: 75% alcohol 5min, 85% alcohol 5min, Anhydrous ethanol - 5min, Anhydrous ethanol - 5min & Xylene - 5min. Shortly after slides were dried and neutral gum was used to seal the slides. Visualization Results were validated with microscope, and the slides were scanned. Paraffin-Embedded Immunohistochemistry Protocol Tissue processing Slides were incubated sequentially into Xylene; 15min – Xylene, 15min - Anhydrous ethanol, 5min - Anhydrous ethanol, 5min - 85% alcohol, 5min - 75% alcohol & 5min – wash in distilled water. Antigen retrieval Tissue slides were incubated with citric acid (PH6.0) antigen retrieval buffer and microwaved for antigen retrieval (heated until boiled and then stopped heating) for 8min. Slides were then heated with medium power for 7min. During this process slides were kept from drying out. After cooling down at room temperature, slides were washed with PBS on shaker for 5min, repeated for 3 times. Inhibition of endogenous peroxidase Slides were placed in 3% Hydrogen peroxide solution, and incubated for 10 min at room temperature without light exposure. Slides were then washed 3 times with PBS on a shaker for 5mins. BSA Blocking Shortly after slides were dried, a PAP pen was used to draw circles around the tissue sections (and to prevent draining of the antibody solution). Inside the circles, BSA was used to cover the tissue evenly, blocking for 30min. Primary antibody incubation After blocking solution was removed a 1:200 solution of primary antibody/PBS was added on the slide, and incubated overnight at 4°C. St John's Laboratory Ltd. www.stjohnslabs.com
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Immunohistochemistry Antibody Validation Report for Anti-CD20 Antibody (STJ96950)
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Transcript
Figure:
Immunohistochemical
analysis of paraffin
embedded Human
breast tissue. 1: CD20
Monoclonal
Antibody(2F4) was
diluted at 1:200 (4
degree
Celsius,overnight). 2:
Sodium citrate pH 6.0
was used for antibody
retrieval (>98 degree
Celsius,20min). 3:
Secondary antibody was
diluted at 1:200 (room
temperature, 30min).
Negative control was
used by secondary
antibody only.
Report Number 96950-a Host Mouse
Application IHC-P Clonality Monoclonal
Model Number STJ96950 Clone ID 2F4
Antibody Name Anti-CD20 antibody
Testing Species HUMAN Testing Tissue BREAST
ANTIBODY VALIDATION REPORT
a. (A small amount of distilled water was added into the incubation
box to prevent evaporation of antibody).
40. Secondary antibody incubation
a. Slides were washed 3 times, with PBS on a shaker for 5min.
Shortly after the slides were dried the corresponding secondary
antibody solution was added (HRP labelled), covering the
tissues, and incubated at room temperature for 30min.
b.
41. DAB staining
a. Slides were washed 3 times, with PBS on a shaker for 5min.
b. Shortly after, the slides were dried and fresh DAB staining buffer
was added inside the circles. The staining time was adjusted
under a microscope. Yellow-brown colour represented a positive
result. Slides were washed with water to stop the staining.
c.
42. Haematoxylin staining
a. Haematoxylin was used to counter-staining for 1min, and then
the slides were washed with water. 1% Hydrochloric acid and
alcohol was added for several seconds and then washed with
water. Ammonia was used to reveal blue colour, and then
flushed with water.
b.
43. Desolation and Clearing
i. Slides were incubated sequentially into: 75% alcohol 5min, 85%