Top 10 Most-read Protocols
Most Read rankings are calculated based on published articles (since 2015) read in the last two months. Rankings are calculated monthly. Rankings are based on page view data provided by Google Analytics.
Measurement of Oxygen Consumption Rate (OCR) and Extracellular Acidification Rate (ECAR) in Culture Cells for Assessment of the Energy Metabolism
Authors:  Birte Plitzko and Sandra Loesgen, date: 05/20/2018, view: 22938, Q&A: 0
Mammalian cells generate ATP by mitochondrial (oxidative phosphorylation) and non-mitochondrial (glycolysis) metabolism. Cancer cells are known to reprogram their metabolism using different strategies to meet energetic and anabolic needs (Koppenol et al., 2011; Zheng, 2012). Additionally, each cancer tissue has its own individual ...
BODIPY 493/503 Staining of Neutral Lipid Droplets for Microscopy and Quantification by Flow Cytometry
Authors:  Bo Qiu and M. Celeste Simon, date: 09/05/2016, view: 30277, Q&A: 0
Lipid droplets (LDs) are ubiquitous, dynamic organelles and function as a storage depot for neutral lipids, including triglycerides and cholesterol esters (Walther and Farese, 2012). The movement of lipid species into and out of LDs impacts a variety of cellular processes, such as energy homeostasis, lipid-based signaling, and membrane homeostasis ...
Sulforhodamine B (SRB) Assay in Cell Culture to Investigate Cell Proliferation
Authors:  Esteban A. Orellana and Andrea L. Kasinski, date: 11/05/2016, view: 30696, Q&A: 0
The SRB assay has been used since its development in 1990 (Skehan et al., 1990) to inexpensively conduct various screening assays to investigate cytotoxicity in cell based studies (Vichai and Kirtikara, 2006). This method relies on the property of SRB, which binds stoichiometrically to proteins under mild acidic conditions and then can be ...
Superoxide Dismutase (SOD) and Catalase (CAT) Activity Assay Protocols for Caenorhabditis elegans
Authors:  Jing Zhang, Rui Chen, Zhenyang Yu and Lili Xue, date: 08/20/2017, view: 17587, Q&A: 0
Assays for superoxide dismutase (SOD) and catalase (CAT) activities are widely employed to indicate antioxidant responses underlying the toxic effects of test chemicals. Yet, earlier studies mainly described the procedures as performed according to manufacturer’s instructions without modifications that are specific to any organisms. The present ...
Cell Synchronization by Double Thymidine Block
Authors:  Guo Chen and Xingming Deng, date: 09/05/2018, view: 13156, Q&A: 1
Cell synchronization is widely used in studying mechanisms involves in regulation of cell cycle progression. Through synchronization, cells at distinct cell cycle stage could be obtained. Thymidine is a DNA synthesis inhibitor that can arrest cell at G1/S boundary, prior to DNA replication. Here, we present the protocol to synchronize cells at ...
Analysis of Protein Stability by the Cycloheximide Chase Assay
Comparison of protein stability in eukaryotic cells has been achieved by cycloheximide, which is an inhibitor of protein biosynthesis due to its prevention in translational elongation. It is broadly used in cell biology in terms of determining the half-life of a given protein and has gained much popularity in cancer research. Here we present a ...
Microbial Mutagenicity Assay: Ames Test
Authors:  Urvashi Vijay, Sonal Gupta, Priyanka Mathur, Prashanth Suravajhala and Pradeep Bhatnagar, date: 03/20/2018, view: 13673, Q&A: 2
The Microbial mutagenicity Ames test is a bacterial bioassay accomplished in vitro to evaluate the mutagenicity of various environmental carcinogens and toxins. While Ames test is used to identify the revert mutations which are present in strains, it can also be used to detect the mutagenicity of environmental samples such as drugs, dyes, ...
Measurement of the Intracellular Calcium Concentration with Fura-2 AM Using a Fluorescence Plate Reader
Authors:  Magdiel Martínez, Namyr A. Martínez and Walter I. Silva, date: 07/20/2017, view: 14815, Q&A: 0
Intracellular calcium elevation triggers a wide range of cellular responses. Calcium responses can be affected or modulated by membrane receptors mutations, localization, exposure to agonists/antagonists, among others (Burgos et al., 2007; Martínez et al., 2016). Changes in intracellular calcium concentration can be measured ...
Isolation of PBMCs Using Vacutainer® Cellular Preparation Tubes (CPTTM)
Authors:  Alaina Puleo, Chantia Carroll, Holden Maecker and Rohit Gupta, date: 01/20/2017, view: 19108, Q&A: 0
Peripheral blood mononuclear cell (PBMC) isolation is commonly done via density gradient centrifugation over Ficoll-Hypaque, a labor-intensive procedure that requires skilled technicians and can contribute to sample variability. Cellular Preparation Tubes (CPTs) are Vacutainer blood draw tubes that contain Ficoll-Hypaque and a gel plug that ...
Soft Agar Colony Formation Assay as a Hallmark of Carcinogenesis
Authors:  Feng Du, Xiaodi Zhao and Daiming Fan, date: 06/20/2017, view: 14090, Q&A: 0
Soft agar colony formation assay is established to estimate the anchorage-independent growth ability of cells. In this assay, a bottom layer of agar with complete media is poured and solidified first, followed by an upper layer containing a specified number of cells suspended in medium-agar mixture. After two weeks of incubation, the number of ...



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