Anti-Helios Alexa Fluor® 647

Anti-Helios Alexa Fluor® 647

• Background: Helios, also known as IKZF2 (Ikaros family zinc finger protein 2) is a hematopoietic-specific transcription factor involved in the regulation of lymphocyte development, together with other members of this family, such as Aiolos and Ikaros. Helios forms homo- and heterodimers with these proteins and is thought to function predominantly in early hematopoietic development. Expression of Helios, Aiolos and Ikaros is restricted to cells of the hematopoietic system, whereas other family members, Eos and Pegassus, are more widely expressed. Helios is expressed at early stages of thymocyte development. In mature T cells, Helios has been strongly associated with Treg cells.
• Specifications: The Armenian hamster monoclonal antibody 22F6 recognizes Helios, a transcription factor (intracellular antigen) expressed in some hematopoietic stem cells, and at high levels in thymic-derived regulatory T cells. The epitope is located between amino acids 51 and 107.
• CAS Number: 9007-83-4
• Certification: RUO
• Host: Armenian Hamster
• Species Reactivity: Mouse, Human
• Immunogen: Peptide coresponding to the amino acids 51-107 of Helios
• Target Antigen: Helios
• Isotype: Igg
• Clone: 22F6
• Applications: Flow cytometry: The reagent is designed for analysis of human blood cells using 4 μl reagent / 100 μl of whole blood or 106 cells in a suspension. The content of a vial (0.4 mL) is sufficient for 100 tests. Intracellular staining.
• Validated Applications: FC
• Format: Alexa Fluor® 647
• Buffer: Stabilizing phosphate buffered saline (PBS), pH 7.4, 15 mM sodium azide
• References & Citations: *Serre K, Bénézech C, Desanti G, Bobat S, Toellner KM, Bird R, Chan S, Kastner P, Cunningham AF, Maclennan IC, Mohr E: Helios is associated with CD4 T cells differentiating to T helper 2 and follicular helper T cells in vivo independently of Foxp3 expression. PLoS One. 20116(6):e20731., URL: https://pubmed.ncbi.nlm.nih.gov/21677778/,*Thornton AM, Korty PE, Tran DQ, Wohlfert EA, Murray PE, Belkaid Y, Shevach EM: Expression of Helios, an Ikaros transcription factor family member, differentiates thymic-derived from peripherally induced Foxp3+ T regulatory cells. J Immunol. 2010 Apr 1184(7):3433-41., URL: https://pubmed.ncbi.nlm.nih.gov/20181882/,*McIver Z, Melenhorst JJ, Wu C, Grim A, Ito S, Cho I, Hensel N, Battiwalla M, Barrett AJ: Donor lymphocyte count and thymic activity predict lymphocyte recovery and outcomes after matched-sibling hematopoietic stem cell transplant. Haematologica. 2013 Mar98(3):346-52., URL: http://www.ncbi.nlm.nih.gov/pubmed/23065508,*Atarashi K, Tanoue T, Oshima K, Suda W, Nagano Y, Nishikawa H, Fukuda S, Saito T, Narushima S, Hase K, Kim S, Fritz JV, Wilmes P, Ueha S, Matsushima K, Ohno H, Olle B, Sakaguchi S, Taniguchi T, Morita H, Hattori M, Honda K: Treg induction by a rationally selected mixture of Clostridia strains from the human microbiota. Nature. 2013 Aug 8500(7461):232-6., URL: http://www.ncbi.nlm.nih.gov/pubmed/23842501 ,*Blankenhaus B, Reitz M, Brenz Y, Eschbach ML, Hartmann W, Haben I, Sparwasser T, Huehn J, Kühl A, Feyerabend TB, Rodewald HR, Breloer M. Foxp38314 regulatory T cells delay expulsion of intestinal nematodes by suppression of IL-9-driven mast cell activation in BALB/c but not in C57BL/6 mice. PLoS Pathog. 2014 Feb 610(2):e1003913., URL: https://pubmed.ncbi.nlm.nih.gov/24516385/,*Daley SR1, Hu DY, Goodnow CC: Helios marks strongly autoreactive CD4+ T cells in two major waves of thymic deletion distinguished by induction of PD-1 or NF-954B. J Exp Med. 2013 Feb 11210(2):269-85., URL: http://www.ncbi.nlm.nih.gov/pubmed/23337809 ,*Pinheiro D, Singh Y, Grant CR, Appleton RC, Sacchini F, Walker KR, Chadbourne AH, Palmer CA, Armitage-Chan E, Thompson I, Williamson L, Cunningham F, Garden OA. Phenotypic and functional characterization of a CD4(+) CD25(high) FOXP3(high) regulatory T-cell population in the dog. Immunology. 2011 Jan132(1):111-22., URL: http://www.ncbi.nlm.nih.gov/pubmed/20880379 ,*Fourcade J, Sun Z, Chauvin JM, Ka M, Davar D, Pagliano O, Wang H, Saada S, Menna C, Amin R, Sander C, Kirkwood JM, Korman AJ, Zarour HM: CD226 opposes TIGIT to disrupt Tregs in melanoma. JCI Insight. 2018 Jul 263(14):e121157. , URL: https://pubmed.ncbi.nlm.nih.gov/30046006/,*Černý V, Novotná O, Petrásková P Hudcová K, Boráková K, Prokešová L, Kolářová L, Hrdý J: Lower functional and proportional characteristics of cord blood treg of male newborns compared with female newborns. Biomedicines 2021, 9, 170., URL: https://pubmed.ncbi.nlm.nih.gov/33572097/,
• Storage Conditions: Store at 2-8°C. Protect from prolonged exposure to light. Do not freeze.