Du sökte efter: STEMCELL Technologies

Leverantör: STEMCELL Technologies

Beskrivning: Insulin-like growth factor 1 (IGF-I) is a polypeptide that belongs to the family of insulin-like growth factors that are similar in molecular structure to proinsulin. IGF-I binds to the IGF-I receptor and is a potent activator of the PI3K/AKT pathway and also activates ERK1/2 signaling. IGF-I is required for embryonic development, and it is produced mainly in the liver in response to a hepatocyte growth hormone. In the absence of insulin, IGF-I is necessary for the maintenance of human pluripotent stem cells (Wang <i>et al.</i>). Together with IL-3, IGF-I stimulates differentiation and proliferation of myeloid cells and has been shown to regulate lymphopoiesis by stimulating proliferation and differentiation of T and B cells in lymphoid organs (Heemskerk <i>et al.</i>). This product is animal component-free.

New Product

Leverantör: STEMCELL Technologies

Beskrivning: Nerve growth factor (NGF)-beta is a prototypical member of the neurotrophin family and has a role in the survival and growth of neural cells, regulating cell growth, promoting differentiation into neurons, and neuron migration. The beta subtype of NGF is biologically active in comparison to the alpha-2 and gamma-2 subtypes. NGF-beta in its secreted form can bind to tyrosine kinase A (trkA) receptor with high affinity and to p75 (NTR) with low affinity (Levi and Alemà; Sofroniew <i>et al.</i>). NGF has been shown to possess pro-inflammatory and pro-fibrogenic properties (Micera <i>et al.</i>). It has also been shown that overexpression of NGF-beta promotes differentiation of bone marrow mesenchymal stem cells into neurons through regulation of AKT and MAPK pathways (Yuan <i>et al.</i>). This product is animal component-free.

New Product

Leverantör: STEMCELL Technologies

Beskrivning: Granulocyte-macrophage colony-stimulating factor (GM-CSF) promotes the proliferation and differentiation of hematopoietic progenitor cells and the generation of neutrophils, eosinophils, and macrophages. In synergy with other cytokines such as stem cell factor, IL-3, erythropoietin, and thrombopoietin, it also stimulates erythroid and megakaryocyte progenitor cells (Barreda <i>et al.</i>). GM-CSF is produced by multiple cell types, including stromal cells, Paneth cells, macrophages, dendritic cells (DCs), endothelial cells, smooth muscle cells, fibroblasts, chondrocytes, and Th1 and Th17 T cells (Francisco-Cruz <i>et al.</i>). The receptor for GM-CSF (GM-CSFR) is composed of two subunits: the cytokine-specific α subunit (GMRα; CD116) and the common subunit βc (CD131) shared with IL-3 and IL-5 receptors (Broughton <i>et al.</i>). GM-CSFR is expressed on hematopoietic cells, including progenitor cells and immune cells, as well as non-hematopoietic cells. Recombinant human GM-CSF (rhGM-CSF) promotes the production of myeloid cells of the granulocytic (neutrophils, eosinophils, and basophils) and monocytic lineages <i>in vivo</i>. It has been tested for mobilisation of hematopoietic progenitor cells and used to treat chemotherapy-induced neutropenia in patients. GM-CSF is able to stimulate the development of DCs that ingest, process, and present antigens to the immune system (Francisco-Cruz <i>et al.</i>).

New Product

Leverantör: STEMCELL Technologies

Beskrivning: Human Interleukin 4 (IL-4) is important for immune responses to helminth infection as well as in allergic responses (Olpihant <i>et al.</i>). The IL-4 receptor consists of a heterodimer of IL-4Ra and common gamma chain. IL-4 receptor engagement leads to the activation of JAK1/3 and the recruitment of STAT6 and IRS1/2 (Nelms <i>et al.</i>). IL-4 drives immunoglobulin class switching in B cells (to IgE, IgG4), mast cell hyperplasia, mucus production, and the differentiation of naïve T cells into T helper type 2 (Th2) cells, which produce IL-4, IL-5, IL-10, and IL-13 (Bao <i>et al.</i>; Olpihant <i>et al.</i>; Nelms <i>et al.</i>). In addition to Th2 T cells, IL-4 is produced by CD4+ NK T cells, γ/δ T cells, activated basophils, eosinophils, and mast cells. IL-4 consists of 130 amino acids with a predicted molecular weight of 15.1 kDa. Human IL-4 does not cross-react with mouse cells (Park <i>et al.</i>). This product is animal component-free.

New Product

Leverantör: STEMCELL Technologies

Beskrivning: Immunomagnetic isolation of untouched human cells

New Product

Artikel nummer : (STMC100-1320)

Leverantör: STEMCELL Technologies

Beskrivning: Use Interleukin 37 (IL-37) to inhibit the expression of inflammatory cytokines, such as IL-6, MIP-1α, MIP-1β, and TNF-α, in a MAPK-dependent manner (Qi <i>et al.</i>). A secreted protein belonging to the interleukin-1 cytokine family, IL-37 acts as an anti-inflammatory alarmin, with predominant expression in monocytes, and constitutive secretion by myeloid dendritic cells (Rudloff <i>et al.</i>). IL-37 has been shown to limit inflammation in human blood M1 macrophages by binding to extracellular surface receptors, requiring IL-1R8 as a coreceptor (Li <i>et al.</i>). It also has protective effects against obesity-induced inflammation and insulin resistance, reducing adipogenesis and activating AMPK signaling both in vitro and <i>in vivo</i> (Ballak <i>et al.</i>). In humans, the IL-37 gene undergoes alternative splicing, resulting in multiple isoforms of the protein (Boraschi <i>et al.</i>). For consistency and reproducibility across your applications, Interleukin 37 from STEMCELL comes lyophilised with ≥93% purity.

UOM: 1 * 100 µG

New Product Sale

 This is a MarketSource item. Additional charges may apply

Artikel nummer : (STMC100-1330)

Leverantör: STEMCELL Technologies

Beskrivning: Complement factor D is a component of the alternative pathway of the complement system and part of the innate immune system, playing a vital role in the initiation and amplification of complement activation, in order to defend against infection (Barratt and Weitz). A serine protease belonging to the S1 peptidase family, complement factor D is secreted by adipocytes into circulating blood, and is also expressed by macrophages and monocytes (White <i>et al.</i>). In the initiation phase of the complement pathway, complement factor D cleaves complement factor B (bound to component C3) to produce a complex known as C3 convertase. During the amplification phase, complement factor D cleaves complement factor B (bound to component C3b) to produce the C3bBb convertase, and is involved in the propagation of complement activation. In addition to its immunological role, complement factor D is involved in other physiological processes, such as the efficient clearing of damaged cell debris by phagocytes following acute liver injury (Cresci <i>et al.</i>). Complement factor D deficiency is associated with an increased susceptibility to pathogens like Neisseria meningitidis (Biesma <i>et al.</i>). This protein contains a His-residue tag at the carboxyl end of the polypeptide chain. For consistency and reproducibility across your applications, complement factor D from STEMCELL comes lyophilised with ≥94% purity, and is verified by LAL analysis to ensure endotoxin levels are ≤1,0 EU/μg protein.

UOM: 1 * 50 µG

New Product Sale

 This is a MarketSource item. Additional charges may apply

Artikel nummer : (STMC100-1327)

Leverantör: STEMCELL Technologies

Beskrivning: Butyrophilin 1A1 (BTN1A1) is a glycoprotein belonging to the butyrophilin (BTN) family which collectively modulates immune responses, through excitatory and inhibitory signals targeting immune cells. Butyrophilins are composed of two extracellular immunoglobulin domains and a transmembrane region, with a conserved B30.2 domain (PRYSPRY) that is present in most members (Malinowska <i>et al.</i>). BTN1A1, along with BTN2A2, has been shown to inhibit the proliferation of CD4+ and CD8+ T cells, modify T cell metabolism, and affect the expression of IL-2 and IFN-γ (Smith <i>et al.</i>). Due to these modulatory effects on T cells, BTN1A1 may have a role in inhibiting the development of autoimmune diseases (Stefferl <i>et al.</i>). BTN1A1 is also expressed in mammary glands and is required for the secretion of milk lipids during lactation (Ogg <i>et al.</i>). This protein contains a His-residue tag at the carboxyl end of the polypeptide chain. For consistency and reproducibility across your applications, Serpin A12 from STEMCELL comes lyophilised with ≥92% purity, and is verified by LAL analysis to ensure endotoxin levels are ≤1,0 EU/μg protein.

UOM: 1 * 100 µG

New Product Sale

 This is a MarketSource item. Additional charges may apply

Leverantör: STEMCELL Technologies

Beskrivning: Receptor activator of nuclear factor kappa-B ligand (RANKL) is a member of the tumor necrosis factor (TNF) superfamily (Anderson <i>et al.</i>). Cytokines in the TNF superfamily are involved in a variety of long-term cellular activities such as differentiation, proliferation, and cell death (MacEwan). RANKL is a type II homotrimeric transmembrane protein expressed in both a membrane-bound and secreted form (Ikeda <i>et al.</i>). RANKL binds to the receptor activator of nuclear factor kappa-B (RANK). Upon binding to its receptor, RANKL activates the AKT signaling pathway (Moon <i>et al.</i>). Osteoprotegerin (OPG) may also bind RANKL, and this binding competes with RANKL-RANK binding (Lacey <i>et al.</i>). RANKL is involved in osteoclastogenesis (Lacey <i>et al.</i>; Yasuda <i>et al.</i>) and T cell activation (Wong <i>et al.</i>). This product is animal component-free.

New Product

Artikel nummer : (STMC100-1298)

Leverantör: STEMCELL Technologies

Beskrivning: Use hepassocin to bind to lymphocyte-activation gene 3 (LAG-3) in an MHC class II independent manner, and inhibit antigen-specific T-cell activation (Wang <i>et al.</i>). Hepassocin is known to play a restorative role in the liver, reducing apoptosis and accelerating hepatocyte proliferation <i>in vivo</i> (Li <i>et al.</i>). In addition to these hepatoprotective effects, studies have shown that hepassocin expression is upregulated in gastric cancer tissues (Zhang <i>et al.</i>) and in breast cancer cells (Du <i>et al.</i>), suggesting it has potential to predict cancer disease progression. Hepassocin is a member of the fibrinogen superfamily, whose members share a fibrinogen domain at their C-terminus. It is predominantly expressed in the liver, and weakly in the pancreas (Hara <i>et al.</i>), and is secreted as a homodimer that consists of 312 amino acids. Hepassocin is an acute-phase reactant whose expression in HepG2 cells has been shown to be regulated by IL-6 (Liu and Ukomadu). This protein product contains a His-residue tag at the carboxyl end of the polypeptide chain. For consistency and reproducibility across your applications, hepassocin from STEMCELL comes lyophilised with ≥87% purity, and endotoxin levels are verified to be ≤1,0 EU/μg protein.

UOM: 1 * 100 µG

New Product Sale

 This is a MarketSource item. Additional charges may apply

Artikel nummer : (STMC100-1332)

Leverantör: STEMCELL Technologies

Beskrivning: Apolipoprotein H (apo H) has been shown to promote the coagulation of blood platelets by inhibiting thrombomodulin complex and inactivating protein C (Keeling <i>et al.</i>), but can also act as an anticoagulant by binding thrombin and inhibiting its procoagulant effects (Pozzi <i>et al.</i>). Belonging to the lipid-binding apolipoprotein family, within the lipocalin superfamily, apo H is a protein constituent of plasma, with a high affinity for negatively charged phospholipids. The structure of apo H reveals four N-terminal complement control protein (CCP) modules, also known as 'sushi' domains, and a distinct fifth C-terminal domain with four antiparallel beta sheets, two alpha-helices, and an extended loop (Schwarzenbacher <i>et al.</i>). Apo H is the main antigen implicated in antiphospholipid syndrome (APS), an autoimmune condition involving pregnancy complications and vascular thrombosis (Brusch). Studies have also reported that Apo H is involved in the progression of atherosclerosis (Harats and George). This protein contains a His-residue tag at the carboxyl end of the polypeptide chain. For consistency and reproducibility across your applications, apolipoprotein H from STEMCELL comes lyophilised with ≥93% purity, and is verified by LAL analysis to ensure endotoxin levels are ≤1,0 EU/μg protein.

UOM: 1 * 100 µG

New Product Sale

 This is a MarketSource item. Additional charges may apply

Artikel nummer : (STMC100-1383)

Leverantör: STEMCELL Technologies

Beskrivning: Stimulating T cells with SARS-CoV-2 (Spike Protein) Omicron/B.1.1.529 WT reference peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. This peptide pool is a lyophilised mixture of 82 peptides from the spike glycoprotein of the wild-type SARS-CoV-2 virus. Consisting of the wild-type peptides that correspond to the mutated portions of the spike protein found in the SARS-CoV-2 Omicron variant (B.1.1.529), this pool is recommended to be used as a reference for the SARS-CoV-2 (Spike Protein) Omicron/B.1.1.529 mutation peptide pool. 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 EEnh

New Product Sale

 This is a MarketSource item. Additional charges may apply

Leverantör: STEMCELL Technologies

Beskrivning: SARS-CoV-2 Recombinant Nucleocapsid Protein, aa1-419 is expressed in HEK293 cells and is one of four structural proteins encoded by the SARS-CoV-2 genome. The Nucleocapsid Protein is transcribed from the viral “N” gene and is the protein that interacts with RNA to form the nucleocapsid. The protein forms a homo-oligomer, and both the monomer and the oligomer can interact with RNA. This protein also interacts with the membrane protein (protein M) after infection of the host cell during packaging of the positive-strand viral genome RNA into the ribonucleocapsid during virion assembly.

Artikel nummer : (STMC100-0512)

Leverantör: STEMCELL Technologies

Beskrivning: FRET-based peptide substrate for detection of protease activity of coronaviruses - 1000 tests.

UOM: 1 * 1.000 Tests

Sale

 This is a MarketSource item. Additional charges may apply

Artikel nummer : (STMC100-0649)

Leverantör: STEMCELL Technologies

Beskrivning: The SARS-CoV-2 (ORF3a) Peptide pool is a lyophilised mixture of 66 peptides from open reading frame 3a (ORF3a) protein of SARS-CoV-2. ORF3a is found in both SARS-CoV and SARS-CoV-2 and the two proteins share high sequence similarity. SARS-CoV ORF3a has been shown to cause apoptosis of infected cells and form potassium-sensitive ion channels, modulating the release of viruses. Additionally, it induces ligand-independent downregulation of Type 1 interferon receptor. The sequence similarity between the two proteins suggests it may play a similar role in SARS-CoV-2. The pool consists of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 275 on SARS-CoV-2 ORF3a.

UOM: 1 * 1 KIT

Sale

 This is a MarketSource item. Additional charges may apply

Artikel nummer : (STMC100-0511)

Leverantör: STEMCELL Technologies

Beskrivning: FRET-based peptide substrate for detection of protease activity of coronaviruses - 100 tests.

UOM: 1 * 100 Tests

Sale

 This is a MarketSource item. Additional charges may apply