Most flexible plate reader with LVF monochromators
The CLARIOstar® is BMG LABTECH’s most flexible microplate reader, equipped with our revolutionary LVF monochromator™ technology. A combination of monochromators, filters, and spectrometer means that it does not compromise on sensitivity or flexibility. As well as its high performance in all detection modes, the CLARIOstar’s versatility also makes it ideal for assay development.
The CLARIOstar is a multi-mode microplate reader with advanced LVF Monochromators™, highly sensitive filters, and an ultra-fast UV/vis spectrometer. It is a modular microplate reader with up to seven different detection modes: fluorescence intensity (incl. FRET), fluorescence polarization, luminescence (including BRET), UV/vis absorbance, time-resolved fluorescence, TR-FRET, and AlphaScreen®/AlphaLISA®/AlphaPlex™.
- Innovative monochromators for increased sensitivity
- Fully-flexible wavelengths and bandwidths
- Spectral scanning in AS, FI and LUM
- Higher light transmission
- High-speed absorbance measurements
- Dedicated laser for Alpha Technology
- Live cell-based assays
- Low volume measurements
PHERAstar measures AlphaScreen assay to develop selective inhibitors for the human YEATS domainsThomas Christott , Carmen Coxon , James Bennett , Charline Giroud , Octovia Monteiro , Oleg Fedorov , , Structural Genomics Consortium, University of Oxford, UK, 04/2018
YEATS domains are epigenetic regulators and are recognised as readers of histone post-translational modifications (HPTM) alongside bromodomains, PHD fingers, and others. YEATS domains bind to lysine when the ε-carbon is acetylated or crotonylated. The YEATS-containing ENL links histone acetylation to active transcription and is a major driver of several types of acute leukaemia. Hence, ENL is a rational drug target to attenuate aberrant cell growth and malignancy.
An AlphaScreen assay that reports on the interaction of modified histone 3 with the YEATS domains of different proteins such as ENL was developed. The inhibitor screening was performed on a PHERAstar® microplate reader and uncovered a potent small molecule inhibitor interfering with the YEATS domains of ENL and AF9.
The PHERAstar FSX provided a powerful and versatile platform for the drug discovery campaign. Here, the inhibitor screening of tens of thousands of compounds for inhibiting the YEATS domain with an AlphaScreen® approach resulted in the identification of a potent small molecule inhibitor.
Cell-based assay detects residual β-blocker substances in effluent of municipal wastewater treatment plantsK. Bernhard , C. Stahl , R. Martens , M. Frey, SIZ Zellkulturtechnik, c/o Hochschule Mannheim, Mannheim, Germany, 03/2018
Residues of human pharmaceuticals, such as β-blockers are increasingly found in effluent wastewater of treatment plants (WWTP) and represent a potential environmental threat. Beta-blockers antagonize β-adrenergic receptors and thereby control hypertension and cardiac arrhythmias. The amino acid sequence of the target, the β1-adrenergic receptor, is evolutionarily highly conserved among vertebrates. Thus, organisms may physiologically respond to β-blockers. For environmental risk assessment one has to know the extent to which aquatic organisms are exposed to β-blockers and metabolites with the same mode of action (MOA).
The mode of action-based β-blocker assay in living cells measures total β-blocker activities in complex mixtures such as WWTP effluents as equivalents of the lead substance metoprolol (MetEQ). The assay is suitable as a standard method in large-scale monitoring of WWTP effluents and the aquatic environment they are discharged into. The CLARIOstar® microplate reader provides highly stable and reliable results as well as the required robustness for continuous use.
FRET sensor assesses ATP levels in living plants experiencing low oxygen conditionsStephan Wagner1,2 , Philippe Fuchs1,2 , Thomas Nietzel1,2 , Marlene Elsässer1,2 , Markus Schwarzländer1,2, 1 Institute of Plant Biology and Biotechnology, University of Münster, Germany , 2 Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Germany, 02/2018
To survive as sessile organisms, plants need to constantly adapt their metabolism to their environment. Flooding of plants is widespread and has severe metabolic consequences as it limits the cellular supply with oxygen to drive respiration, and thus production of ATP. Submergence acclimation typically involves drastic alterations in metabolism to circumvent anoxia and to maintain primary metabolism and ATP supply. We have recently established the use of a genetically encoded protein sensor (ATeam1.03-nD/nA) to assess MgATP dynamics in the model plant Arabidopsis thaliana.
This FRET-system read on a CLARIOstar® allows for reliable analyses of changes in MgATP in vivo and in real-time and provides a new handle to investigate the energetic consequences of low oxygen for the plant cell. The microplate reader’s orbital averaging function acquires the signal in multiple points of the well to obtain a meaningful result of the non-homogenously distributed Arabidopsis seedlings.
CRISPR/Cas9 genome-edited cells express nanoBRET-donor that monitors protein interaction and traffickingCarl White1,2 , Ethan See1,2 , Kevin Pfleger1,2,3, 1Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, Australia , 2Centre for Medical Research, The University of Western Australia, Australia , 3Dimerix Limited, Nedlands, Australia, 01/2018
GPCRs are important drug targets requiring receptor-protein interaction and trafficking studies to reveal how they function. Bioluminescence resonance energy transfer (BRET) is a versatile tool to study such interactions and trafficking. Hitherto, it is limited by the ectopic expression of labelled interaction partners. CRISPR/Cas9 genome editing overcomes the limitation by enabling endogenous expression of luciferase-labelled proteins.
CRISPR/Cas9-edited cells endogenously expressing a CXCR4/NanoLuciferase fusion protein were used in conjunction with β-Arrestin/Venus to monitor receptor activation. Employing two fluorophores fused to a membrane and endosome standing CXCR4-interacting protein, respectively, allowed for monitoring of receptor trafficking.
The novel CRISPR/Cas9 technique successfully fused the Nluc BRET donor to endogenously-expressed CXCR4. The resulting protein levels were sufficient to monitor receptor interactions as well as internalization. The internalization assay depends on two acceptor fluorophores whose selective detection was rendered possible by the CLARIOstar’s monochromator.
Assay development for essential enzyme activity in the tegument of live SchistosomesMadhu Sundaraneedi1 , Luke Becker2 , Giovanni Abbenante3 , Alex Loukas2 , Grant Collins1 , Mark Pearson2, 1School of Physical, Environmental and Mathematical Sciences, University of New South Wales, Australia , 2Australian Institute for Tropical Health and Medicine, James Cook University, Australia , 3BMG LABTECH Australia, 12/2017
Schistosomiasis is a parasitic disease that affects over 200 million people in tropical, developing nations, causing severe morbidity and over 300,000 deaths annually. Schistosomiasis is treated with a single drug and no vaccine is available.
We selected three Schistosoma surface-associated enzymes that are indispensable to parasitic survival: alkaline phosphatase; phosphodiesterase SmNPP-5 and an acetylcholinesterase. The activity of these molecules on the surface of live and intact larval and adult Schistosoma can be assayed in real-time of cultured parasites, providing a tool to assess the efficacy of drugs or vaccines targeting these enzymes. The colorimetric assay was read on a FLUOstar® Omega microplate reader.
The versatile instrument supports development of assays and drugs. Apart from its absorbance spectrometer, the FLUOstar Omega is equipped with fluorescence and luminescence detection capabilities allowing fast and reliable endpoint and kinetic measurements in all detection modes.