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STEMCELL Technologies
Fournisseur:
STEMCELL Technologies
Description:
Ammonium chloride solution is recommended for the lysis of red blood cells (RBCs) in preparations of human and mouse peripheral blood, spleen or bone marrow cells. It is buffered and optimised for gentle lysis of erythrocytes, with minimal effect on leukocytes. It does not contain a fixative agent, therefore leukocytes are viable following RBC lysis.
Fournisseur:
STEMCELL Technologies
Description:
Interleukin 21 (IL-21) is a pleiotropic cytokine that is composed of four α-helical bundles and primarily produced by natural killer T (NKT) cells, T follicular helper (Tfh) cells, and Th17 cells (Spolski and Leonard 2008). IL-21 signals via heterodimers of the IL-21 receptor (IL-21R) and the IL2RG-encoded common cytokine receptor γ-chain (Parrish-Novak <i>et al.</i>; Ozaki K <i>et al.</i> 2000), and utilizes the JAK/STAT, MAPK, and PI3K pathways (Spolski and Leonard 2014). IL-21 has been shown to have a critical role in regulating immunoglobulin production and differentiation of the pro-inflammatory Th17 population of cells (Ozaki <i>et al.</i> 2002; Nurieva <i>et al.</i>). Additionally, IL-21 specifically sustains CD8+ T cell effector activity and provides a mechanism of CD4+ T cell help during chronic viral infection (Elsaesser <i>et al.</i>). IL-21 signaling was also found critical for the development of type 1 diabetes in NOD mice (Sutherland <i>et al.</i>) and control of T cell autoimmunity by regulatory B cells (Yoshizaki <i>et al.</i>). This product is animal component-free.
Fournisseur:
STEMCELL Technologies
Description:
Interleukin 1 beta (IL-1β) is synthesised as an inactive precursor protein or pro-IL-1β. This precursor is cleaved intracellularly by Caspase 1 (IL-1β convertase) to form the active form of the protein that is later secreted (Allan <i>et al.</i>). IL-1β binds to IL-1 receptor and activates intracellular signaling via the MAPK or NF-kB pathway. IL-1β is released by monocytes, tissue macrophages, and dendritic cells in response to infection or injury and induces expression of acute-phase proteins. It also promotes the infiltration of inflammatory and immunocompetent cells from the circulation into the extravascular space and affected tissues, by stimulating the expression of adhesion molecules on endothelial cells. IL-1β also affects other immune cells; for example, it co-stimulates T cell functions together with antigen or mitogen. It also stimulates Th17 differentiation and B cell proliferation in an IL-6-dependent manner. This product is animal component-free.
Numéro de catalogue:
(STMC100-1270)
Fournisseur:
STEMCELL Technologies
Description:
Trigger a variety of immunological responses with <i>E. coli</i> Lipopolysaccharide O55:B5 (S-form), a lipopolysaccharide (LPS) derived from the O55:B5 serotype of the Gram-negative bacteria and nbsp <i>Escherichia coli</i>. Composed of a lipid A, a core oligosaccharide, and an O antigen, LPS are glycolipid constituents that reside on the outer membranes of gram-negative bacteria (Kitchens RL <i>et al.</i>). LPS protects bacteria against bile salts and lipophilic antibiotics by maintaining the outer integrity of the cell membrane (Bäckhed F <i>et al.</i>). <i>E. coli</i> lipopolysaccharide O55:B5 (S-form), in particular, is predominantly recognized by toll-like receptor 4 (TLR4), which leads to the activation of NF-κβ, a protein complex which plays a key role in regulating immune response (Kuzmich N <i>et al.</i>). Activation of NF-κβ can trigger increased production of pro-inflammatory cytokines IL-1 and TNF-α by macrophages (Matuschak GM <i>et al.</i>). This LPS can also interact with CD14 to activate phospholipase Cγ2 and kinases of the Src family, trigger influxes of extracellular Ca2+, as well as calcineurin-dependent translocation of the nuclear factor of activated T cells (NFAT) family of transcription factors (Li CC <i>et al.</i>). When added to ImmunoCult™-SF macrophage medium (Catalog #10961), stimulation with lipopolysaccharide from <i>E. coli</i> (O55:B5) and IFN-γ supports the polarization to M1 (classically activated) macrophages. Warning: This product is highly pyrogenic. Avoid all means by which the product may enter the bloodstream.
UOM:
1 * 1 mL
New Product
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Numéro de catalogue:
(STMC100-1335)
Fournisseur:
STEMCELL Technologies
Description:
Use visfatin to catalyse the production of nicotinamide mononucleotide from nicotinamide (Revollo <i>et al.</i>). Nicotinamide mononucleotide is a precursor to nicotinamide adenine dinucleotide (NAD) that is vital to energy metabolism, cell death, and other cellular processes (Ying). Visfatin also acts as an immunomodulator by activating leukocytes and inducing the production of pro-inflammatory and anti-inflammatory cytokines (Moschen <i>et al.</i>), and there is evidence that visfatin can regulate insulin receptor signaling and insulin secretion (Brown <i>et al.</i>). Belonging to the nicotinate phosphoribosyltransferase (NAPRTase) family, Visfatin is an adipokine that is produced in adipocytes, leukocytes, and hepatocytes (Chiu <i>et al.</i>, Garten <i>et al.</i>, Kralisch <i>et al.</i>). It is active as a homodimer with each identical monomer consisting of two structural domains made up of 19 β-strands and 13 α-helices (Kim <i>et al.</i>). For consistency and reproducibility across your applications, visfatin from STEMCELL comes lyophilised with ≥90% purity, and is verified by LAL analysis to ensure endotoxin levels are ≤1,0 EU/μg protein.
UOM:
1 * 1 EA
New Product
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Numéro de catalogue:
(STMC100-1389)
Fournisseur:
STEMCELL Technologies
Description:
Stimulating T cells with EBV (LMP2A) peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. EBV (LMP2A) peptide pool is a lyophilised mixture of 27 peptides from latent membrane protein 2A (LMP2A) of Epstein-Barr virus (EBV; strain GD1), and consists of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 118 on LMP2A. LMP2A contributes to the survival of EBV-transformed B cells (Mancao and Hammerschmidt) and mediates partial escape of infected B cells from recognition by EBV-specific CD8+ T cells (Rancan et al). Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.
UOM:
1 * 1 PE
New Product
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Numéro de catalogue:
(STMC100-1390)
Fournisseur:
STEMCELL Technologies
Description:
Stimulating T cells with EBV (GP350/340) Peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. EBV (GP350/340) Peptide pool is a lyophilised mixture of 224 peptides from envelope glycoprotein GP350 (GP350/340) of Epstein-Barr virus (EBV; strain B95-8), and consists of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 907 on GP350/340. GP350 meditates EBV attachment to B lymphocytes via binding to the cell surface receptor CR2 (also known as C3d receptor or CD21) (Nemerow <i>et al.</i>; Tanner <i>et al.</i>). Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.
UOM:
1 * 1 PE
New Product
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Numéro de catalogue:
(STMC100-1386)
Fournisseur:
STEMCELL Technologies
Description:
Stimulating T cells with EBV (EBNA-3A) Peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. EBV (EBNA-3A) Peptide pool is a lyophilised mixture of 234 peptides from Epstein-Barr nuclear antigen 3 (EBNA-3A) of Epstein-Barr virus (EBV; strain B95-8) and consists of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 944 on EBNA-3A. EBNA-3A contributes to B cell growth transformation (Hertle <i>et al.</i>; Tomkinson <i>et al.</i>) and has been found to interact with host cell proteins, where it activates (Young <i>et al.</i>) or represses (Cludts and Farrell; Hickabottom <i>et al.</i>) transcription of specific cellular genes. Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.
UOM:
1 * 1 PE
New Product
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Numéro de catalogue:
(STMC100-1079)
Fournisseur:
STEMCELL Technologies
Description:
Extraction immunomagnétique d'acides nucléiques totaux (ADN et ARN).
UOM:
1 * 1 EA
New Product
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Fournisseur:
STEMCELL Technologies
Description:
For detection and measurement of human immunoglobulin E.
Numéro de catalogue:
(STMC100-1063)
Fournisseur:
STEMCELL Technologies
Description:
Mouse monoclonal antibody against human E-cadherin (CD324).
UOM:
1 * 100 µl
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Numéro de catalogue:
(STMC100-1066)
Fournisseur:
STEMCELL Technologies
Description:
Rabbit polyclonal antibody against human villin 1.
UOM:
1 * 100 µl
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Numéro de catalogue:
(STMC100-1422)
Fournisseur:
STEMCELL Technologies
Description:
Stimulating T cells with SARS-CoV-2 (Spike Protein) Omicron XBB.1.5.X Mutation peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. This pool is provided as two lyophilised mixtures (subpools) from the spike glycoprotein of SARS-CoV-2 Omicron XBB.1.5.X subvariant. The subpools contain 158 and 157 peptides, respectively, for a total of 315 peptides, and consist of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 1269 on the spike protein. Through interactions with the angiotensin-converting enzyme 2 (ACE2) receptor, the spike protein enables the virus to attach to the cell membrane, and plays a critical role in viral entry (Hoffmann <i>et al.</i>; Walls <i>et al.</i>). Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.
UOM:
1 * 1 PE
New Product
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Numéro de catalogue:
(STMC100-1405)
Fournisseur:
STEMCELL Technologies
Description:
Stimulating T cells with CMV (UL44) peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. CMV (UL44) peptide pool is a lyophilised mixture of 106 peptides from DNA polymerase processivity factor UL44 of human cytomegalovirus (CMV; strain AD169), and consists of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 433 on UL44. UL44 contains a nuclear localization signal (Alvisi <i>et al.</i>) and may bind DNA directly, or form a C clamp partially surrounding it, similar to proliferation cell nuclear antigen (PCNA) (Appleton <i>et al.</i>). UL44 has also been found to interact with viral (Kim and Ahn) and host (Strang <i>et al.</i>) proteins that contribute to viral DNA replication and efficient viral growth. Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.
UOM:
1 * 1 PE
New Product
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Fournisseur:
STEMCELL Technologies
Description:
B cell activating factor (BAFF) is part of the tumor necrosis factor (TNF) superfamily and is expressed by monocytes, macrophages, dendritic cells, and neutrophils (Mackay and amp; Browning; Scapini <i>et al.</i>). It binds to 3 receptors: BAFF-R, TACI, and BCMA, all of which are expressed by B cells at various times in their development (Liu and amp; Davidson). BAFF-R signaling activates the NF-kB signaling pathway, and promotes B cell survival, Ig class switching, and antigen presentation (Bossen and amp; Schneider; Liu and amp; Davidson; Naradikian <i>et al.</i>). BAFF also has functions in other cell types: it promotes monocyte survival and activation, proinflammatory cytokine secretion, and differentiation into macrophages (Chang <i>et al.</i>), and co-stimulates anti-CD3-mediated activation of human T cells (Huard <i>et al.</i>; Mackay and amp; Leung).
Fournisseur:
STEMCELL Technologies
Description:
Immunomagnetic isolation of untouched human T cells for HLA analysis
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