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89601
ICOS (D1K2T™) Rabbit mAb (IHC Specific)
Primary Antibodies

ICOS (D1K2T™) Rabbit mAb (IHC Specific) #89601

APPLICATIONS

REACTIVITY SENSITIVITY MW (kDa) Isotype
H Endogenous 25-40 Rabbit IgG
IHC-Leica® Bond™

Immunohistochemical analysis of paraffin-embedded human colon adenocarcinoma using ICOS (D1K2T™) (IHC Specific) Rabbit mAb performed on the Leica® BOND™ Rx.

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IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human breast carcinoma using ICOS (D1K2T™) Rabbit mAb.

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IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human colon carcinoma using ICOS (D1K2T™) Rabbit mAb.

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IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human lymphoma using ICOS (D1K2T™) Rabbit mAb.

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IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human tonsil using ICOS (D1K2T™) Rabbit mAb.

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Immunohistochemistry (Leica®BOND™)

NOTE: Please see product datasheet or product webpage for appropriate antibody dilution^.

  Step Reagents Time/Temperature
1 Dewax BOND™ Dewax Solution, 100% Alcohol, BOND™ Wash Solution Pre-programmed Leica® BOND™ 
2 Antigen Retrieval  BOND™ Epitope Retrieval ER2 Solution 20 min., 100˚C | Protocol: HIER 20 min with ER2
3 Peroxide Block Refine Detection Kit Peroxide Block* 5 min.
  WASH BOND™ Wash Solution  3x 0:00 min.
4 Protein Block (optional) #5425 NGS or #15019 Animal-Free Blocking Solution   20 min. 
5 Primary Antibody^ Dilute in #8112 SignalStain® Antibody Diluent 30 min. 
  WASH BOND™ Wash Solution  3x 2:00 min.
NA Post Primary Mouse Linker Refine Detection Kit Post Primary*  Not Applied 
6 Secondary Detection Refine Detection Kit Polymer*  10 min. 
  WASH BOND™ Wash Solution/Deionized Water Custom (see below)
7a Visualization Refine Detection Kit Mixed DAB Refine*  0:00 min. 
7b Visualization Refine Detection Kit Mixed DAB Refine*  10 min. 
  WASH Deionized Water 3x 0:00 min.
8 Counterstain Refine Detection Kit Hematoxylin*  5 min. 
  WASH Deionized Water 0:00 min. 
  WASH BOND™ Wash Solution  0:00 min. 
  WASH Deionized Water 0:00 min. 
9 Dehydration (Offline):    
  Incubate sections in 95% ethanol two times for 10 seconds each.  
  Repeat in 100% ethanol, incubating sections two times for 10 seconds each.  
  Repeat in xylene, incubating sections two times for 10 seconds each.  
10 Mount sections with coverslips and #14177 SignalStain® Mounting Medium  
       
  Optional Custom wash:  BOND™ Wash Solution 2:00
    BOND™ Wash Solution Dispenser Type: OPEN 0:00
    BOND™ Wash Solution 2:00
    BOND™ Wash Solution Dispenser Type: OPEN 0:00
    BOND™ Wash Solution 0:00
    Deionized Water 0:00

*Reagent included in BOND™ Polymer Refine Detection Kit (Catalog No: DS9800)

LEICA® is a registered trademark of Leica Microsystems IR GmbH.

BOND™ is a trademark of Leica Biosystems Melbourne Pty. Ltd. No affiliation or sponsorship between CST and Leica Microsystems IR GmbH or Leica Biosystems Melbourne Pty. Ltd is implied.

posted August 2018

revised September 2018

Protocol Id: 1444

Immunohistochemistry (Paraffin)

A. Solutions and Reagents

NOTE: Prepare solutions with reverse osmosis deionized (RODI) or equivalent grade water.

  1. Xylene.
  2. Ethanol, anhydrous denatured, histological grade (100% and 95%).
  3. Deionized water (dH2O).
  4. Hematoxylin (optional).
  5. Wash Buffer:
    1. 1X Tris Buffered Saline with Tween® 20 (TBST): To prepare 1L 1X TBST add 100 ml 10X Tris Buffered Saline with Tween® 20 (#9997) to 900 ml dH20, mix.
  6. SignalStain® Antibody Diluent (#8112).
  7. 1X Citrate Unmasking Solution: To prepare 250 mL of 1X citrate unmasking solution, dilute 25 ml of SignalStain® Citrate Unmasking Solution (10X) (#14746) with 225 mL of dH2O.
  8. 3% Hydrogen Peroxide: To prepare 100 ml, add 10 ml 30% H2O2 to 90 ml dH2O.
  9. Blocking Solution: TBST/5% Normal Goat Serum or 1X Animal-Free Blocking Solution.
    1. TBST/5% Normal Goat Serum: to 5 ml 1X TBST, add 250 µl Normal Goat Serum (#5425).
    2. 1X Animal-Free Blocking Solution: to 4 mL of dH2O add 1 ml of Animal-Free Blocking Solution (5X) (#15019).
  10. Detection System: SignalStain® Boost IHC Detection Reagents (HRP, Rabbit #8114).
  11. Substrate: SignalStain® DAB Substrate Kit (#8059).
  12. Hematoxylin: Hematoxylin (#14166).
  13. Mounting Medium: SignalStain® Mounting Medium (#14177).

B. Deparaffinization/Rehydration

NOTE: Do not allow slides to dry at any time during this procedure.

  1. Deparaffinize/hydrate sections:
    1. Incubate sections in three washes of xylene for 5 min each.
    2. Incubate sections in two washes of 100% ethanol for 10 min each.
    3. Incubate sections in two washes of 95% ethanol for 10 min each.
  2. Wash sections two times in dH2O for 5 min each.

C. Antigen Unmasking

For Citrate: Heat slides in a microwave submersed in 1X citrate unmasking solution until boiling is initiated; follow with 10 min at a sub-boiling temperature (95°-98°C). Cool slides on bench top for 30 min.

D. Staining

  1. Wash sections in dH2O three times for 5 min each.
  2. Incubate sections in 3% hydrogen peroxide for 10 min.
  3. Wash sections in dH2O two times for 5 min each.
  4. Wash sections in wash buffer for 5 min.
  5. Block each section with 100–400 µl of preferred blocking solution for 1 hr at room temperature.
  6. Remove blocking solution and add 100–400 µl primary antibody diluted in SignalStain® Antibody Diluent (#8112) to each section. Incubate overnight at 4°C.
  7. Equilibrate SignalStain® Boost Detection Reagent (HRP, Rabbit #8114) to room temperature.
  8. Remove antibody solution and wash sections with wash buffer three times for 5 min each.
  9. Cover section with 1–3 drops SignalStain® Boost Detection Reagent (HRP, Rabbit #8114) as needed. Incubate in a humidified chamber for 30 min at room temperature.
  10. Wash sections three times with wash buffer for 5 min each.
  11. Add 1 drop (30 µl) SignalStain® DAB Chromogen Concentrate to 1 ml SignalStain® DAB Diluent and mix well before use.
  12. Apply 100–400 µl SignalStain® DAB to each section and monitor closely. 1–10 min generally provides an acceptable staining intensity.
  13. Immerse slides in dH2O.
  14. If desired, counterstain sections with hematoxylin (#14166).
  15. Wash sections in dH2O two times for 5 min each.
  16. Dehydrate sections:
    1. Incubate sections in 95% ethanol two times for 10 sec each.
    2. Repeat in 100% ethanol, incubating sections two times for 10 sec each.
    3. Repeat in xylene, incubating sections two times for 10 sec each.
  17. Mount sections with coverslips and mounting medium (#14177).

posted February 2010

revised March 2016

Protocol Id: 283

Application Dilutions
IHC-Leica® Bond™ 1:200
Immunohistochemistry (Paraffin) 1:200
Storage:

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

ICOS (D1K2T™) Rabbit mAb recognizes endogenous levels of total ICOS protein.

Species Reactivity:

Human

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human ICOS protein.

ICOS (Inducible Co-Stimulator, CD278) is a member of the CD28 family that regulates T cell activity and immune responses (1). The ICOS protein contains an extracellular IgV like domain, a transmembrane domain, and an intracellular domain with a YMFM motif (1-2). ICOS is primarily expressed on activated CD4+ and CD8+ T cells (1). Upon binding to its ligand, ICOS potentiates the T cell response to antigen through activation of the PI3K signaling pathway (2). In addition to enhancing T cell activation and proliferation, ICOS plays an important role in the regulation of T follicular helper cells (4). Research studies suggest that ICOS is a potential therapeutic target, and could serve as a prognostic biomarker for neoplastic therapy involving CTLA-4 blockade (5-7).

  1. Hutloff, A. et al. (1999) Nature 397, 263-6.
  2. Coyle, A.J. et al. (2000) Immunity 13, 95-105.
  3. Fos, C. et al. (2008) J Immunol 181, 1969-77.
  4. Hutloff, A. (2015) Oncotarget 6, 21785-6.
  5. Kyi, C. and Postow, M.A. (2014) FEBS Lett 588, 368-76.
  6. Fan, X. et al. (2014) J Exp Med 211, 715-25.
  7. Ng Tang, D. et al. (2013) Cancer Immunol Res 1, 229-34.
Entrez-Gene Id
29851
Swiss-Prot Acc.
Q9Y6W8
For Research Use Only. Not For Use In Diagnostic Procedures.

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
D1K2T is a trademark of Cell Signaling Technology. Inc.
SignalStain is a trademark of Cell Signaling Technology, Inc.
BOND is a trademark of Leica Biosystems Melbourne Pty. Ltd. No affiliation or sponsorship between CST and Leica Microsystems IR GmbH or Leica Biosystems Melbourne Pty. Ltd is implied.
LEICA is a registered trade​mark of Leica Microsystems IR GmbH.

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