Human Fas/TNFRSF6/CD95 ELISA Kit (Colorimetric)

ELISA: Human Fas Receptor/TNFRSF6/CD95 ELISA Kit (Colorimetric) [NBP1-91190] - Fas/TNFRSF6/CD95 ELISA Kit [NBP1-91190] - Standard curve

• Reactivity: Hu
• Applications: ELISA
• Suitable Sample Type: Cell culture supernatant, serum
• Standard Curve Range: 15.6 - 1,000 pg/mL
• Sensitivity: 13.2 pg/mL

Human Fas/TNFRSF6/CD95 ELISA Kit (Colorimetric) Summary

• Description: The human sAPO-1/Fas ELISA is an enzyme-linked immunosorbent assay for the quantitative detection of human sAPO-1/Fas.
• Specificity: The cross-reactivity and interference of circulating factors of the immune system was evaluated by spiking these proteins at physiologically relevant concentrations into a human Fas/TNFRSF6/ CD95 positive sample. No cross-reactivity or interference was detected.
• Standard Curve Range: 15.6 - 1,000 pg/mL
• Sensitivity: 13.2 pg/mL
• Assay Type: Sandwich ELISA
• Inter-Assay: CV% < 3.10%
• Intra-Assay: CV% < 4.50%
• Spike Recovery: 100%
• Sample Volume: 10 uL
• Kit Type: ELISA Kit (Colorimetric)
• Gene: FAS

Applications/Dilutions

• Dilutions:
  • ELISA

Packaging, Storage & Formulations

• Storage: Storage of components varies. See protocol for specific instructions.

Alternate Names for Human Fas/TNFRSF6/CD95 ELISA Kit (Colorimetric)

• Apo-1 antigen
• Apo-1
• apoptosis antigen 1
• Apoptosis-mediating surface antigen FAS
• APT1
• APT1FASTM
• CD95 antigen
• CD95
• CD95ALPS1A
• Fas (TNF receptor superfamily, member 6)
• Fas AMA
• Fas antigen
• Fas
• FAS1
• FASLG receptor
• TNFRSF6
• TNFRSF6member 6
• tumor necrosis factor receptor superfamily member 6

Background

Tumor Necrosis Family Receptor (TNFR) superfamily member Fas, also known as CD95, APO-1, and TNFRSF6, is a 40-50 kDa type I transmembrane glycoprotein that is traditionally considered a death receptor but also functions in non-apoptotic signaling (1-4). The human Fas/TNFRSF6/CD95 protein is encoded by the FAS gene which contains 9 exons and is located on chromosome 10 (10q23.3-4) (1,2). The mature canonical Fas/TNFRSF6 protein isoform is 335 aa in length, which includes the signal sequence, and has a theoretical molecular weight of 37.7 kDa (1,5). The protein contains an extracellular domain (ECD) consisting of three calcium rich domains (CRDs), a transmembrane domain (TM), and an intracellular domain (ICD) comprised of a calcium-inducing domain (CID) and characteristic dead domain (DD) (1,2,5,6). The Fas protein is expressed on the plasma membrane of activated lymphocytes as a homotrimer formed via CRD1 interactions (1,2,3,6). The DD is crucial for apoptotic signaling which is triggered by the Fas receptor binding its ligand, Fas ligand (FasL) (1,2,6,7). Upon Fas-FasL interaction, the DD recruits an adapter protein Fas-associated DD (FADD) and procaspase-8, generating the death-inducing signaling complex (DISC) (1-4,6-8). Formation of DISC activates caspase-8 and leads to cleavage of caspase-3, initiating a caspase-signaling cascade and cell death (1-4,6-8).

Fas-FasL-mediated apoptosis is important in immune homeostasis and removal of autoreactive T cells, autoreactive B cells, cytotoxic natural killer (NK) cells, and more (1,2,7). Dysfunction and mutations in the Fas receptor and the Fas-FasL signaling axis is associated a loss of apoptotic signaling and removal of autoreactive cells, which correlates with several autoimmune diseases including systemic lupus erythematosus (SLE), autoimmune lymphoproliferative syndrome (ALPS), and multiple sclerosis (MS) (1-4,6,7). In addition to apoptosis and cell death signaling, FasL/TNFRSF6/CD95 mediates other pathways involved in proliferation, survival, and differentiation (3,4,6,8). More specifically, Fas has been shown to activate the NF-kappaB pathway, driving innate immunity which includes IL-1beta production and functioning in host defense (3,4,6,8). Fas is also involved in adaptive immunity playing a role in co-stimulation of CD4+ and CD8+ T cell activation as well as precocious differentiation of naive cells to effector memory T cells (3,4,6). Differentiation into effector memory T cells shows protection against autoimmunity but also limits antitumor response to a form of cancer immunotherapy called adoptive cell transfer (ACT) (3,4). The non-apoptotic roles of the Fas/TNFRSF6/CD95 receptor highlight its potential as a target for both treating autoimmune diseases and in cancer immunotherapy (3,4).

References

1. Singh R, Pradhan V, Patwardhan M, Ghosh K. APO-1/Fas gene: Structural and functional characteristics in systemic lupus erythematosus and other autoimmune diseases. Indian J Hum Genet. 2009;15(3):98-102. https://doi.org/10.4103/0971-6866.60184

2. Magerus A, Bercher-Brayer C, Rieux-Laucat F. The genetic landscape of the FAS pathway deficiencies. Biomed J. 2021;44(4):388-399. https://doi.org/1010.1016/j.bj.2021.06.005

3. Guegan JP, Legembre P. Nonapoptotic functions of Fas/CD95 in the immune response. FEBS J. 2018;285(5):809-827. https://doi.org/10.1111/febs.14292

4. Yi F, Frazzette N, Cruz AC, Klebanoff CA, Siegel RM. Beyond Cell Death: New Functions for TNF Family Cytokines in Autoimmunity and Tumor Immunotherapy. Trends Mol Med. 2018;24(7):642-653. https://doi.org/10.1016/j.molmed.2018.05.004

5. Uniprot (P25445)

6. Guegan JP, Ginestier C, Charafe-Jauffret E, et al. CD95/Fas and metastatic disease: What does not kill you makes you stronger. Semin Cancer Biol. 2020;60:121-131. https://doi.org/10.1016/j.semcancer.2019.06.004

7. Volpe E, Sambucci M, Battistini L, Borsellino G. Fas-Fas Ligand: Checkpoint of T Cell Functions in Multiple Sclerosis. Front Immunol. 2016;7:382. Published 2016 Sep 27. https://doi.org/10.3389/fimmu.2016.00382

8. Cullen SP, Martin SJ. Fas and TRAIL 'death receptors' as initiators of inflammation: Implications for cancer. Semin Cell Dev Biol. 2015;39:26-34. https://doi.org/10.1016/j.semcdb.2015.01.012

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. ELISA Kits are guaranteed for 6 months from date of receipt.

Publications for Fas/TNFRSF6/CD95 ELISA Kit (NBP1-91190)(3)

Publications using NBP1-91190

• Ćorić L, Sović S, Šimac B et al. Bcl-2 and FAS as Apoptosis-Related Markers in Patients with Convulsive Status Epilepticus. Journal of clinical medicine 2025-10-16 [PMID: 41095813]
• Katsa ME, Kostopoulou E, Nomikos T et al. The Response of Antioxidant Enzymes and Antiapoptotic Markers to an Oral Glucose Tolerance Test (OGTT) in Children and Adolescents with Excess Body Weight International journal of molecular sciences 2023-11-20 [PMID: 38003707] (ELISA)

FAQs for Fas/TNFRSF6/CD95 ELISA Kit (NBP1-91190). (Showing 1 - 1 of 1 FAQs).

1. What is the difference between the Quantikine and Duoset ELISA kits?
   • Our Quantikine kits are fully optimized and validated for the sample types listed on the product specific webpage and datasheet, as this can vary between kits. Each kit is supplied ready to use with one pre-coated 96-well plate, a detection antibody directly conjugated to HRP, and all other necessary reagents. These kits are ideal for researchers who want the convenience of a ready to use and optimized ELISA product. Some of these kits are also available prepackaged in larger 6 and 50 plate sizes.Our DuoSet Kits, in contrast, are ELISA development kits containing the capture and detection antibody, the mass-value calibrated standard, and streptavidin-HRP to prepare approximately 5 or 15 plates. Ancillary reagents will need to be used/purchased, and for most kits, we will recommend one of our Ancillary Reagent Kits, which contain the reagents we use ourselves in-house. DuoSet kits are validated only for cell culture supernatant samples and therefore require further development and validation for accurate measurement in more complex samples such as serum and plasma. Our DuoSet Kits offer an economical, flexible alternative for the experienced ELISA user.

Bioinformatics

• Gene Symbol: FAS