Recombinant Human ICOS Protein (C-Fc)

Name: Recombinant Human ICOS Protein (C-Fc)
Brand: Beta LifeScience
SKU: BL-0045NP
Price: 244.0 USD
Availability: InStock

BL-0045NP: Greater than 95% as determined by reducing SDS-PAGE. (QC verified)

Collections: Antibody / cell therapy targets, Antibody therapeutic / adc target proteins, Co-stimulatory receptors, Featured immune checkpoint protein molecules, Immune checkpoint proteins, Recombinant proteins

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Product Overview

Description	Recombinant Human Inducible T-cell Costimulator is produced by our Mammalian expression system and the target gene encoding Glu21-Phe141 is expressed with a human IgG1 Fc tag at the C-terminus.
Accession	Q9Y6W8
Synonym	Inducible T-cell costimulator;activation-inducible lymphocyte immunomediatory molecule; CD278; AILIM; CVID1;ICOS;
Gene Background	Inducible T-cell costimulator, also known as activation-inducible lymphocyte immunomediatory molecule, CD278, AILIM, CVID1 and ICOS, belongs to the CD28 and CTLA4 cell surface receptor family.. ICOS contains one Ig-like V-type domain and exsits as a homodimer with disulfide-linked. ICOS is highly expressed on tonsillar T-cellsand can be induced by PMA and ionomycin, ICOS plays an important role in cell-cell signaling, immune responses, and regulation of cell proliferation. Defects in ICOS are the cause of immunodeficiency common variable type 1, which is a primary immunodeficiency characterized by antibody deficiency, hypogammaglobulinemia, recurrent bacterial infections and an inability to mount an antibody response to antige
Molecular Mass	40.9 KDa
Apmol Mass	47 KDa, reducing conditions
Formulation	Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4.
Endotoxin	Less than 0.1 ng/µg (1 EU/µg) as determined by LAL test.
Purity	Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
Biological Activity	Not tested
Reconstitution	Always centrifuge tubes before opening. Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles.
Storage	Lyophilized protein should be stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at ≤ -20°C for 3 months.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature listed below.
Usage	For Research Use Only

Target Details

Target Function	Enhances all basic T-cell responses to a foreign antigen, namely proliferation, secretion of lymphokines, up-regulation of molecules that mediate cell-cell interaction, and effective help for antibody secretion by B-cells. Essential both for efficient interaction between T and B-cells and for normal antibody responses to T-cell dependent antigens. Does not up-regulate the production of interleukin-2, but superinduces the synthesis of interleukin-10. Prevents the apoptosis of pre-activated T-cells. Plays a critical role in CD40-mediated class switching of immunoglobin isotypes.
Subcellular Location	[Isoform 1]: Cell membrane; Single-pass type I membrane protein.; [Isoform 2]: Secreted.
Database References	HGNC: 5351 OMIM: 604558 KEGG: hsa:29851 STRING: 9606.ENSP00000319476 UniGene: Hs.56247
Associated Diseases	Immunodeficiency, common variable, 1 (CVID1)
Tissue Specificity	Activated T-cells. Highly expressed on tonsillar T-cells, which are closely associated with B-cells in the apical light zone of germinal centers, the site of terminal B-cell maturation. Expressed at lower levels in thymus, lung, lymph node and peripheral

Gene Functions References

ICOS (-693A/G) gene polymorphism is associated with Colon Cancer Risk. PMID: 29580042
The altered soluble (s)PD1 and sICOS serum levels in the different Hepatitis b (HBV) groups may reflect the dysregulation of T cell activation, and may be associated with the HBV pathological process. PMID: 28983583
we have found an association between chronic spontaneous urticaria and polymorphisms in the ICOS gene. To our knowledge, this report is the fi rst to suggest and initially indicate a possible association of the ICOS rs6726035 TT genotype with CSU pathogenesis. PMID: 28940644
Suggest that genetic polymorphisms of ICOS function as sex-dependent risk factors for development of acute rejection in an Iranian kidney transplant population. PMID: 28031007
Binding of NUFIP2 to Roquin promotes recognition and regulation of ICOS mRNA. PMID: 29352114
OX40 and ICOS act in a cooperative, nonredundant manner to maximize and prolong the T follicular helper cell response that is generated after acute virus infection PMID: 27895177
High ICOS expression is associated with colorectal neoplasms. PMID: 27197182
This is the first replication association study of rs4325730 upstream of ICOS with AIH in the Japanese population and rs4325730G is a risk allele. PMID: 27974812
the induction pathway of ICOS(+) Foxp3(+) cells was analyzed PMID: 27756099
ratio of ICOS(+) /PD-1(+) Tfh cells and the frequency of IL-21(+) Tfh cells may be indicators for evaluating the idiopathic membranous nephropathy development PMID: 26845249
Follicular helper T cells differentiation is a multistage process involving BCL6 and other transcription factors, cytokines, and costimulation through ICOS and several other molecules. (Review) PMID: 26120879
novel deletion mutation in Pakistani siblings presents in childhood with a combined Immunodeficiency associated with an enteritis, hepatitis and impaired antiviral immunity PMID: 26399252
findings show Tregs from inflamed lung of sarcoidosis patients characterized by ICOS(high) phenotype; high-level ICOS expression was restricted to Tregs from inflamed lung and was absent in blood Tregs of sarcoidosis patients and in lung and blood Tregs of healthy volunteers; potential implication of ICOS/ICOS-L immune-regulatory axis in in disease activity and resolution PMID: 26415669
findings indicated that circulating memory Tfh cells, especially CCR7+ICOS+ memory Tfh cells, may be associated with the relapse of MS and may serve as a new therapeutic target PMID: 26231034
Expression of mutant caspase-9 correlated with a downregulation of BAFFR (B-cell-activating factor belonging to the TNF family (BAFF) receptor) in B cells and ICOS (inducible T-cell costimulator) in T cells. PMID: 25569260
This study found that ICOS rs1559931 SNP was associated with decreased hepatitis B virus-related hepatocellular carcinoma risk in the studied Chinese Han population, except for patients with natural clearance of hepatitis B virus. PMID: 26074057
Thymus medullary epithelial cells promote regulatory T-cell generation by stimulating interleukin-2 production via ICOS. PMID: 25210803
Data indicate that T cells redirected with an inducible T-cell costimulator ICOS-based chimeric antigen receptors CAR maintained a core molecular signature characteristic of TH17 cells. PMID: 24986688
Increased numbers of circulating ICOS(+) and IL-21(+) Tfh and CD38(+) plasma cells may be exhibited by patients with recent diagnoses of primary biliary cirrhosis. PMID: 25404409
Aberrant sPD1 and sICOS serum levels may reflect the dysregulation of Tcell activation, and are associated with the pathological injury of chronic HCV infection. PMID: 23426717
Data indicate that Tregs and its inducible costimulatory molecule (ICOS+) subsets are decreased in patients with myocardial infarction (MI) and stable angina (SA). PMID: 22426168
Data indicate the expression of programmed cell death protein 1 (PD-1), inducible T-cell Costimulator (ICOS), Cytotoxic T-Lymphocyte Antigen 4 (CTLA-4) and T cell immunoglobulin and mucin protein 3 (Tim-3) in T-cells from geriatric and younger subjects. PMID: 24083425
The associations between costimulatory molecule gene polymorphisms including: CTLA4, PD-1, ICOS and CD28 with active cytomegalovirus (CMV) infection were evaluated in hematopoietic stem cell transplant patients. PMID: 24057239
The acquisition of B cell stimulating properties by naive cord blood CD4 T cells required the STAT3-dependent expression of ICOS and IL-21. PMID: 23923047
SNPs of ICOS showed no association with Hashimoto thyroiditis. PMID: 23138463
In a transgenic graft-vs-host disease (GVHD)model, mouse CD4 T cells depend more heavily on ICOS/phosphatidylinositol 3-kinase (PI3K) signaling axis, whereas CD8 T cells are able to induce GVHD utilizing PI3K-independent ICOS signaling mechanisms. PMID: 23729441
A molecular and computational diagnostic approach identifies FOXP3, ICOS, CD52 and CASP1 as the most informative biomarkers in acute graft-versus-host disease. PMID: 22491736
Results suggest that the serum level of sICOS is increased in patients with diffuse cutaneous SSc and correlates with the severity and activity of skin sclerosis and interstitial lung disease. PMID: 23053221
Augmented ICOS signalling may contribute to the pathogenesis of systemic sclerosis during early progressive disease. Soluble ICOS levels may be used as a serum marker for the activity and severity of systemic sclerosis. PMID: 23024058
ICOS-Fc inhibited the adhesion of both dendritic cells to vascular and lymphoid endothelial cells, their migratory activity, and the expression of the Rac-1 activator beta-Pix involved in cell motility. PMID: 23275603
ICOS expression on CD4 + CD45RO + and CD8 + CD4RO + T cells was significantly increased in systemic lupus erythmetaous (SLE) patients. ICOS expression in lupus nephritis patients was higher than in SLE patients without lupus nephritis. PMID: 21479882
Genetic variation in ICOS gene is associated with acute rejection of liver transplantation. PMID: 22579879
ICOS gene polymorphisms may affect the risk of breast cancer and show that some SNPs are associated with breast cancer characteristics in a northern Chinese population. PMID: 21917182
The constellation of specific alleles in CTLA-4, CD28, and ICOS genes contributes to the susceptibility and clinical course of non-small-cell lung cancer. PMID: 21669243
Increased quantities of inducible costimulator-positive Tregs may influence IgG4 production in IgG4-related autoimmune pancreatitis. PMID: 21926547
NPM-ALK induces expression of the growth-promoting receptor ICOS. PMID: 21765024
ICOS polymorphisms was significantly different in pemphigus and suggest that genetically determined abnormal function of costimulatory receptors in T cells may be associated with the pathogenesis of pemphigus PMID: 21084022
circulating neoplastic T cells correspond more often to a CD10-positive subset than to an ICOS-positive subset in Angioimmunoblastic T-cell lymphoma PMID: 21499231
This indicates that the investigated ICOS polymorphisms do not modulate the risk of B-CLL in the Polish population, but are associated with disease dynamics, in particular with the time to Rai stage progression. PMID: 21526489
we found a trend for reduced expression of ICOS after gluten-free diet treatment in the intestine of celia disease children. PMID: 21288140
polymorphisms of three major genes involved in the regulation of immune response, CTLA4, CD28 and ICOS might be involved in development of the clinical variables of IgAN PMID: 21677403
these data suggest that preeclampsia is associated with ICOS, but is not associated with the CTLA-4 or CD28 gene polymorphisms. PMID: 21160481
Report the role of ICOS in allergen-induced T cell activation in allergic asthma and rhinitis. PMID: 21356099
these results suggest that the polymorphisms in the CD28, CTLA4 and ICOS genes at least do not modulate risk of melanoma and nor do those influence the disease prognosis in the investigated population. PMID: 19672595
In active ulcerative colitis CD86 and ICOS were over-expressed in the intestinal epithelial cells and lamina propria mononuclear cells. PMID: 20388394
Increased amount of CD86 or ICOS positive lamina propria mononuclear cells and enterocytes suggests that co-stimulatory molecules may play a role in the pathogenesis of Crohn disease. PMID: 20019769
Results reveal a vital role for ICOS signaling in the generation and maintenance of human T(H)17 cells and suggest that components of this pathway could be therapeutically targeted to treat cancer or chronic infection. PMID: 20980695
High ICOS expression is associated with lymphomas of T follicular helper cell. PMID: 20207847
The rs6726035 in ICOS was significantly associated with RA, Comparing the genotype frequencies in the codominant model (CC vs. CT, CC vs. TT) in the rs6726035 SNP revealed that the C allele appeared to be decreased in patients with RA patients. PMID: 20113255
ICOS polymorphisms were not associated with susceptibility to cervical squamous cell (CSCC) and with histologic grade of CSCC. PMID: 19913589

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

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