Focusing on new / innovative technologies and industry challenges
The Life Science Business of Merck KGaA, Darmstadt, Germany Webinar Channel features scientific presentations from key specialists in analytical chemistry, biology, chemistry and life sciences on the practical and technical aspects of new developments and innovations, to help advance your research.
1. The kidney proximal tubule is the primary site of drug-induced nephrotoxicity. I will describe the development of a 3-dimensional flow-directed proximal tubule microphysiological system (MPS). The kidney MPS recapitulates the synthetic, metabolic and transport activities of kidney proximal tubule cells. This MPS is as an ideal platform for ex vivo modeling of nephrotoxicity. Towards this goal, we have evaluated nephrotoxicity in response to challenge with multiple toxicants, including the heavy metal pollutant cadmium, antisense oligonucleotides, the antibiotic polymyxin B and the Chinese herbal product aristolochic acid. We believe that MPS technologies will have major impacts on predictive toxicity testing and human risk assessment. Animal and in vitro systems do not always faithfully recapitulate drug and xenobiotic responses in the clinic or occupational/environmental exposures, respectively. MPS technologies will refine safety assessment and reduce our need for surrogate animal testing. An ultimate goal is to create integrated human MPS organ systems that could replace animal models.
2. Nortis has developed a technology that is used to recapitulate functional units of human organs in microfluidic devices (chips). Such organ models include vasculature, kidney, and liver models for toxicology studies, blood-brain barrier models for drug transport studies, and vascularized tumor microenvironment models for drug efficacy studies.
Solid phase microexatraction or SPME is a green method for extraction of analytes out of a sample. Since SPME is a non-exhaustive extraction technique, some analysts believe that SPME is not quantifiable. This presentation will provide basic information for developing a method to extract and quantify analytes using SPME. Examples will be given on the extraction and quantification of analytes out of various matrices, and SPME will be compared to other extraction techniques such as QuEChERS and SPE. In this webinar, we will discuss some new SPME technologies such as SPME-OC (over-coated) fibers and BioSPME that help to isolate and quantify analytes from interfering compounds in the matrix. Guidelines will be provided for enhancement of precision using SPME.
The benefits of three dimensional (3D) cell culture are widely appreciated. More cell-based technologies are now becoming available that enable researchers to preserve the native 3D structure of cells in vitro. These can be broadly divided into three areas: aggregate-based methods; hydrogels and extra-cellular matrices; and inert scaffold-based technologies. Each has strengths and weaknesses and there is no one technology that satisfies all applications. Tissues in the body are mostly composed of different cell types that are often highly organized in relation to each other. Often cells are arranged in distinct layers that enable signalling and cell-to-cell interactions. Alternatively in tumours, cancer cells form aggregates and tissue masses composed of different cell types. Recreation of these types of architecture will significantly evolve 3D cell culture to a new level where real tissue-like structures can be generated in vitro.
This webinar will review the alternative approaches available to researchers and provide an overview of their capabilities and example applications. More sophisticated models are developing as 3D cell culture technology becomes established and accepted as a means of creating more physiologically relevant cell-based assays. Methods that are relatively straightforward to use and that recreate the organized structure of real tissues will become valuable research tools for use in discovery, validation studies, and modelling disease.
Key areas covered:
• 2D vs 3D cell culture debate
• Review of alternative approaches and the development of new technologies
• Challenges facing 3D culture methods, in terms of technologies available and methods used
• Showcase applications where 3D technology makes a difference
• Future perspective for 3D cell culture technology and further development
Does western blotting give you more trouble than expected? Do you feel like your precious samples are being wasted on bad westerns? Join us and find out how you can improve your western blots! In this seminar, you will learn general guidelines for performing and troubleshooting your westerns, such as:
• Choice of different blotting membranes
• Parameters affecting blotting efficiency
• Conditions for optimizing your immunodetection
• Information on SNAP i.d.® 2.0 system: A faster way to perform immunodetection
Understanding the movements, modifications and interactions of proteins within a cell is key to unraveling the fundamental tenets of biology. However, the low-level expression of many proteins, combined with the transient nature of their interactions and movements, makes analyzing and understanding these processes quite difficult. Duolink® PLA, which is based on the principles of the proximity ligation assay (PLA), offers a solution to overcome these hurdles and to study the actions of endogenous proteins within cells and tissues. Combining the specificity of antibodies with the sensitivity afforded by rolling circle amplification, Duolink® PLA allows you to detect, visualize, and quantitate proteins and their interactions (even single events) where they happen within cells or tissue, all without overexpression or genetic manipulation. This seminar will cover the basic assay principle and advantages of the Duolink® PLA technology, and discuss recent applications and developments of the technology that make it an excellent tool to understand the fundamental mechanisms of biology, as well as disease states. Applications of Duolink® PLA include the investigation of cellular responses to varying stimuli, receptor dimerization and signalling cascades, post-translational modifications, and regulation of protein expression. New developments include use in flow cytometry and multiplexed detection.
For the past two decades, Solid Phase Microextraction (SPME) has represented a convenient alternative to conventional sample prep procedures. SPME allows the simultaneous extraction and enrichment of analytes of interest from a given matrix in a single step while avoiding, or drastically minimizing, the use of organic solvents and time-consuming cleanup procedures.
Like any other analytical method, the various parameters governing the SPME process need to be carefully optimized in order to achieve robustness and sensitivity. However, certain aspects of SPME method development are often overlooked by many users, leading to unsatisfactory performance of the technique.
This webinar will shed light into several aspects of SPME method development. The presentation will include a theoretical explanation of SPME fundamentals and practical suggestions to overcome common errors and bias encountered when using SPME.
The webinar is divided in three main sections: 1) optimization of extraction conditions 2) matrix modifications 3) optimization of desorption conditions for gas and liquid chromatography. Each section is divided in various subsections dedicated to each parameter affecting the performance of the SPME technique. The webinar attendees will be guided through comprehensive understanding of the technology and the critical parameters that influence the extraction process with practical examples from already existing methods.
Lung cancer is the most commonly diagnosed non-skin cancer in the United States. Each year, over 222,000 people are diagnosed with lung cancer, and over 150,000 succumb each year to the illness, making it also the deadliest cancer in the country. With constant advancement of treatment options, the importance of accurate diagnosis and detection of lung cancer becomes more and more relevant to the survival of the patient. Immunohistochemistry has served as the catalyst for these advancements in lung cancer diagnosis. This presentation covers many of the basic science, facts, and statistics of lung cancer, as well as the utility of immunohistochemical testing with markers such as TTF-1, napsin A, desmoglein-3, and p40 in the accurate diagnosis and survival rates of lung cancer.
In typical analytical workflows, sample preparation accounts for over 60% of the time taken to generate results and 30% of any errors generated. To help analytical chemists maintain the cornerstones of all analytical processes, namely; speed, specificity, sensitivity, and reproducibility, considerable resources have been devoted to the development of new and unique technologies in the sample preparation field. With specific reference to solid phase extraction and solid phase microextraction, this presentation will outline new technologies and techniques developed in sample preparation for food analysis.
CRISPR Cas9 nucleases have revolutionized the field of gene editing and high-throughput lentiviral screens continue to hold ever-increasing promise for both basic research and development of future therapies to benefit human health. Even with such powerful technologies at hand, researchers new to the field may find the screening of multiple targets to be challenging and time-consuming. This webinar discusses the Evotec partnership with Life Science Business of Merck KGaA, Darmstadt, Germany and the screening services for drug discovery.