Gene reporter assays are widely used in research and Drug Discovery. The development of such cell lines is often time-consuming and costly, sometimes upwards of 5-20k € per cell line. And once these cell lines are finally validated, why jeopardize your results with cheap and low-end detection kits? They could impact the reproducibility of your experiments in unintended and unanticipated ways. BPS Bioscience has developed two reliable and extremely powerful luciferase detection kits: the ONE-Step™ Luciferase Assay System (#60690) and the Dual Luciferase Assay System (#60683). [Read more…]
Challenges and limitations of ADC development
One of the major challenges of modern medicine is to find a safe cancer therapy. The Food and Drug Administration has approved Adcetris® (brentuximab vedotin) and Kadcyla® (ado-trastuzumab emtansine) that are considered as powerful treatments against cancer. They are good examples of antibody-drug conjugates (ADCs). The principle is to link a drug, that can be cytotoxic, to an antibody able to target cancer cells. Unfortunately, the development of ADCs faces some difficulties. Indeed, depending on the method for the conjugation, the ADC can be highly heterogenous. [Read more…]
This summer, Moffett et al. published in Nature Communications (Nature Communications – doi:10.1038/s41467-017-00505-8) a new approach for cancer therapeutic research and development based on mRNA delivery. They called it ‘Hit-and-run programming’ because of the simplicity of the method. Interestingly, the optimization of the delivery was performed with eGFP mRNA. This post describes how TriLink’s mRNAs contribute to the simple and efficient delivery of mRNA into cells.
Expression systems – removing their contaminants
CHO, E. Coli and Pichia are useful expression systems for drug production. This can be for proteins, enzymes or antibody productions. Research and development for therapeutic perspectives requires a high level of quality controls. Such expression systems contain +1000 host cell proteins (HCPs). A major challenge in biological component production is to remove this HCP contamination. In order to monitor removal efficiency (during protein purification, as mentioned further on in this article), Canopy Biosciences have developed and optimised HCP detection kits based on the principle of the sandwich ELISA test as illustrated below.
HepatoSure® is a pool of human hepatocytes designed to facilitate your DMPK applications with a consistent hepatocyte product over time (years). HepatoSure® is best suited for both discovery and development of ADME-Tox study assays where generation and comparison of data is required. Let’s take a closer look, and you might like to benefit from our current offer to try these for yourself (see below). [Read more…]
Functionality and viability of primary cells can be impaired by incorrect thawing procedures, storage or culture conditions. It’s generally admitted that applying the same protocols as for cell lines leads will lead to bad cell quality. Well, based on our experience with primary cells, here are a few tips you can follow to ensure you get the best performance.
Exploring the small RNA transcriptome, a key challenge
Small RNA are involved in numerous biological process and linked to a wide range of conditions. For example miRNA can be used for detection of cancers from blood samples and are used for cancer classification. They are involved in the regulation of the messenger RNA translation.
The small RNA transcriptome is a vast world rich in information. There are not only miRNA but other small RNA that can also be used for diagnostics. For example, Repetto et al in 2015 (doi: 10.1186/s12916-015-0489-y) discovered novel small RNA in blood, s-RNY1-5p as a diagnostic biomarker for atherosclerosis-related diseases. The authors used small-RNA sequencing with the innovative CleanTag technology.
Biomolecule conjugation is critical to many applications such as bead-based assays, ELISA and chromatography by affinity. Unfortunately the classical methods are known to be tedious and with low efficiency. Trilink Biotechnologies has come this year with the solution, an innovative chromophore-linker-based conjugation chemistry called ChromaLink. [Read more…]
Capping is a required protection in 5′ of the mRNA that is necessary for biological activity and stability into the cells. There are already several methods of capping using mCap, ARCA or enzymatic methods. Unfortunately, they are limited in efficiency (such as mCap and ARCA), and can be costly (such as the enzymatic methods). Trilink Biotechnologies, the modified nucleic acid experts, have developped a new, far more efficient technology called CleanCap available in Europe via tebu-bio. [Read more…]
Vector-free CRISPR-CAS9 gene editing to accelerate therapeutic applications
A few years ago, Ayal Hendel et al (doi:10.1038/nbt.3290) published results revealing that chemical alterations to sgRNA enhance gene editing in primary cells. To demonstrate this, Matthew H Porteus’s team chose the targeted genes CCR5, HBB and IL2RG respectively involved in anti-HIV clinical trials, cell anaemia and thalassemia, and severe combined immunodeficiency. More recently, the same team tested several modified CAS9 mRNA. You can find the practical results on this poster introduced at the ASGC. [Read more…]