Cell-Based ELISA Kits allow now a precise measurement of the phosphorylation status or expression profiles of target proteins (biomarkers) in whole cells. In this post, a review of high performing cell-based assays is made.
Signal-Seeker assays (Cytoskeleton Inc.) provides researchers with the most comprehensive reagents enabling highly sensitive and specific detection of the key Post Translational Modifications (PTMs) of your Protein of Interest.
In this post, I invite you to look at experimental results obtained with these unique assays for the characterization of Tyrosine Phosphorylation, Ubiquitination, SUMOylation and Acetylation of endogenous proteins. [Read more…]
In living organisms, ExtraCellular Matrix (ECM) builds up a complex and dynamic network of molecules, playing a major role in structural support, adhesion, movement and cellular regulation. Major components of the ECM (Collagen, Proteoglycans, Elastin, Hyaluronan) are key elements studied in the Pharmaceutical and Cosmetology fields due to their strong involvement in tissue regeneration, skin repair, wound healing, ageing diseases, surgery, inflammation, and also tumour development.
Boost your ECM studies with these 5 kits!
To help you in monitoring this component, let’s take a look at five robust and easy-to-use, in vitro assays, with colorimetric read-outs for easier daily use in your research.
Due to its involvement in many cellular processes such as normal ageing, tumor suppression, chronic diseases and many more, cellular senescence has gained increasing attention since its first description over 50 years ago. In addition, understanding of cellular senescence is invaluable in the development of therapeutic targets in the fight against age-related co-morbidities, cancer and chronic disease progression.
Over-expressed in senescent cells, Senescence-associated β-galactosidase (SA-β-gal), has been widely used as a marker of cellular senescence. In order to specifically detect this biomarker directly in living cells or tissues, let’s take a look at an easy and ready-to-use assay recently developed: the SPiDER-βGal- Cellular Senescence Detection kit. [Read more…]
Over the last several years, the Immune System has appeared as a central, priority target to fight cancer and various other diseases. Currently, in cancer treatment most of the Immunotherapeutic successes, are molecules developed to modulate and restore immune response by targeting critical Immune Checkpoints.
Some of them can activate T Cells, and on the opposite, some can inhibit this response against cancer cells, such as PD-1 and CTLA4, two of the most studied Immune Checkpoints. The majority of the popular molecules approved in Immunotherapy which have led to clinical benefits, are antibodies inhibiting immune checkpoint activities, such for PD1 with nivolumab and pembrolizumab, or CTLA4 with ipilumab.
In the field of Drug Development, 3D cell culture models such as spheroids or organoids currently appear as one of the best solutions to obtain accurate and physiological in vitro data, closest to what occurs in the human body. These models are the perfect intermediary between “less realistic” classical in vitro static screening well plates, and animal models which, although more relevant, are much more complicated to set up, and are time consuming. [Read more…]
As a regulator of the immune system, Immune checkpoints appear to be privileged targets In Drug Discovery and Immunotherapy research. Indeed, promising molecules tested in clinical trials and approved are giving new hope for cancer treatment. Beyond checkpoint receptors, the Enzymatic pathway also regulates the immune system and provides additional targets for Drug Development, and may increase the chances of clinical success in Cancer treatment.
In addition to already developed Immune Checkpoint Reporter cell lines (as introduced in my previous post), BPS Bioscience also provide tools to study the enzymatic pathway, such as the tryptophan catabolism pathway controlled by IDO1: The IDO / TDO pathway. [Read more…]
As discussed previously in our recent Drug Discovery post, Immunotherapy is one of the central research fields for various disease treatments and also certain cancers. A major regulator of immune homoeostasis and preventing autoimmunity, but potentially dysregulated in various cancers, Immune Checkpoint targeting has already led to promising treatment molecules (Nivolumab, Pembrolizumab…).
To face the challenges of Immune system complexity and the tumor microenvironment, BPS Biosciences have developed several reporter cellular lines (the full listing is here) to complement Biochemical assays. By providing more physiological outcomes in a cellular context (functionality of the whole cell signaling pathway) BPS cell lines allow, for example, the identification of an agonist vs antagonistic effect of your candidate. [Read more…]
PD-1:PD:-L1 immune checkpoint pathway targeting immunotherapies have shown great potential for many cancer patients. Recently, The FDA has granted accelerated approval to the immunotherapy drug pembrolizumab (Keytruda® – humanized monoclonal IgG4 antibody against human cell surface receptor PD-1) for use in some patients with advanced gastric stomach cancer (see NIH-NCI news). However, response to these treatments is not guaranteed for each patient. With the complexity of the immune system and tumour microenvironment, providing more physiological outcomes for immunotherapies is necessary. Biochemical assays alone cannot consider the functionality of the whole cell signalling pathway. Complementing them with cell-based assays provides a comprehensive approach for identifying and developing new and improved immunotherapy treatments. Cellular line engineering has simplified and accelerated the development of such immunoassays. Targets have been chosen from both immune activators and suppressors with the aim of obtaining precise control of the immune system.
BPS Bioscience have engineered 6 cellular lines, turning them into cell-based reporter assays for Human Immune Checkpoint research. I’d like to present a summary of how each cellular line functions.
Live Cell Imaging has transformed the way biologists study cellular functions and processes. The observation of dynamic changes provides more insight into the processes happening in a cell, as compared to imaging studies of fixed cells. Goryo Chemical have developed a broad range of innovative Live Cell Imaging fluorescent probes for various applications. Let’s take a closer look… [Read more…]