Protocol for 3/7 assay. Includes: Detection of Caspase-3 and -7 Activities in Cell-Based Assays; Detection of Caspase-3 or -7 Activity Using Purified Caspases. - [Read 3-7 Assay Protocol]
This protocol describes a sealed preparation that allows the continuous long-term observation of cultured mammalian cells on upright or inverted microscopes without environmental CO2 control. The preparation allows for optical conditions consistent with high-quality imaging and good cell viability for at least 100 hours. - [Read A Sealed Preparation for Long-Term Observations of Cultured Cells]
Protocol for a single-step method for the simultaneous preparation of DNA, RNA, and protein from cells and tissues. The yield of total RNA depends on the tissue or cell source, but it is generally in the range of 4-7 µg/mg starting tissue or 5-10 µg/106 cells. IMPORTANT: Prepare all reagents used in this protocol with Diethyl pyrocarbonate (DEPC)-treated H2O. - [Read A Single-step Method for the Simultaneous Preparation of DNA, RNA, and Protein from Cells and Tissue]
There are many ways to adapt cell lines to serum-free media. Five methods are presented that are designed for adapting hybridomas to a protein-free medium. These protocols may require some modifications for your particular cell line and conditions. - [Read Adapting Cells to a Serum-Free Environment Protocol]
Recombinant protein or a chemically synthesized bioactive fragment is immobilized on resin and used as a probe to capture interacting proteins directly from a cell extract. Affinity-purified proteins are fractionated by gel electrophoresis and visualized by Coomassie staining. Proteins that interact specifically are identified by comparing this gel profile to one obtained from cell lysates passed over a control resin lacking the immobilized probe protein. - [Read Affinity Purification of Interacting Proteins from Cell Lysates Protocol]
Aggregation of ES cells and eight cell stage embryos- http://web.archive.org/web/20021020163836/grimwade.biochem.unimelb.edu.au/bowtell/cellbiol/sect65.htm#Aggregation%20of%20ES%20cells%20and%20eight%20cell%20stage%20embryos
Aggregation: Production of Chimerae. Detailed ES cell growth and preparation information for aggregations. Edward W. Scott Univ. Florida Shands Cancer Center - [Read Aggregation: Production of Chimerae]
Traditional animal models to quantify the degree of blood vessel formation are being replaced by cell culture assays
that are easier to set up, statistically reliable and can be automated in a drug screening laboratory. These assays rely on the endothelial cells’ ability to form distinct blood-vessel-like tubules in an extracellular matrix where they can subsequently be visualized by fluorescence microscopy. - [Read An Image-Based Assay of Endothelial Cell Tube Formation as a Model of Angiogenesis]
An Integrative Procedure for Apoptosis Identification and Measurement. Yingyu Cui Lab/Group: National Key Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences. I have uploaded an integrative procedure through which a relatively satisfactory result can be obtained following a single stage of cell culture and transient cell treatment, then detection with different instruments. This shortens experiment time. - [Read An Integrative Procedure For Apoptosis Identification And Measurement]
Simple and universally applicable methods for staining fixed cells are presented, as are methods that utilize detergents and proteolytic treatment to permeabilize cells. Additionally, supravital cell staining with Hoechst 33342, which is primarily used for sorting live cells for subsequent culturing based on DNA-content differences, is also described. Also presented are methods for staining of cell nuclei isolated from paraffin-embedded tissues, and deconvolution of DNA-content-frequency... - [Read Analysis of Cellular DNA Content by Flow Cytometry Protocol]
Analysis of DNA Fragmentation Using Agarose Gel Electrophoresis Shailaja Kasibhatla et al. This protocol provides a qualitative method for assessing cell death by detecting DNA fragments using agarose gel electrophoresis. One of the classic features of apoptosis is the cleavage of the genomic DNA into oligonucleosomal fragments represented by multiples of 180-200 bp. Visualizing these fragments can aid in characterizing an apoptotic event. May be combined with more quantitative methods. - [Read Analysis of DNA Fragmentation Using Agarose Gel Electrophoresis (Subscription Required)]
Analysis of DNA Fragmentation Using the JAM Assay. By Shailaja Kasibhatla et al., The JAM assay is based on labeling nuclear DNA of cycling cells with [3H]thymidine and harvesting samples on glass fiber filters. Apoptosis will generate DNA fragments small enough to pass through the glass fiber filter, resulting in decreased radioactivity of the particular sample. Cell-mediated cytotoxicity or cell killing mediated by cytotoxic T lymphocytes (CTL) can also be measured by this technique. - [Read Analysis Of DNA Fragmentation Using The JAM Assay (Subscription Required)]
Anatomy of a comparative gene expression study. Includes: Choosing Cell Populations; mRNA Extraction and Reverse Transcription; Fluorescent Labeling of cDNA's; Hybridization to a DNA Microarray; Scanning the Hybridized Array; Interpreting the Scanned Image. - [Read Anatomy of a Comparative Gene Expression Study]
Information on anatomy of a comparative gene expression study. Includes: Choosing cell populations; mRNA Extraction and Reverse Transcription; Fluorescent labeling of cDNA's; Hybridization of DNA microarray; Scanning the hybridized array; Interpreting the scanned image. - [Read Anatomy of a Comparative Gene Expression Study]
Annexin V Protocol- http://www.cyto.purdue.edu/flowcyt/research/cytotech/apopto/data/chap16.htm
Annexin V, belonging to a recently discovered family of proteins, the annexins, with anticoagulant properties has proven to be a useful tool in detecting apoptotic cells since it preferentially binds to negatively charged phospholipids like PS in the presence of Ca2+ and shows minimal binding to phosphatidylcholine and sphingomyeline. Changes in PS asymmetry, which is analyzed by measuring Annexin V binding to the cell membrane, were detected before morphological changes associated with... - [Read Annexin V Protocol]
Different cell types vary in their phosphatidylserine (PS) content, along with the amount of PS exposure on the cell surface after cell death. This protocol is a guideline for getting started, however it may be necessary to adjust the concentration of the Annexin V-FITC. - [Read Annexin V Protocol for Flow Cytometry]
A Single Stranded Plasmid DNA Isolation Protocol describing the production and isolation of single-stranded DNA (ssDNA) using bacteriophagemid-containing bacteria and helper phage. Infection of the host cells with helper phage allows for packaging of ssDNA into bacteriophage. The ssDNA can then be isolated from phage particles.
DNA microarrays are an ordered arrangement of DNA molecules complementary to genes of interest that are "spotted" by robotic equipment onto a glass slide substrate. The expression of genes in cells can be monitored with microarrays by preparing cDNA from the mRNA of cells of interest and measuring the hybridization to the microarray. This protocol describes the labeling of genomic DNA for use as a probe for hybridization to the cDNA spotted on the array.
Tubulin is polymerized into microtubules by incubating tubulin at 37°C with GTP. A nucleation seed is added when the purpose is to assay microtubule elongation. Tubulin can also be polymerized for the purposes of recycling the tubulin or labeling the microtubules with fluorescently labeled tubulin. Based on the protocol by Timothy Mitchison of Harvard University.
This Microarray Protocol Preparation of Fluorescent DNA Probes from Human mRNA protocol describes the production of probes labeled with the fluorescent dyes, Cy3 and Cy5, following the synthesis of cDNA from human mRNA and the hybridization of the probes to DNA microarrays.
A single step RNA isolation protocol using Phenol Chloroform Extraction and Acid Guanidinium Thiocyanate. This RNA isolation method uses the fact that guanidinium thiocyanate can simultaneously lyse the cells and inactive cellular RNAses during the initial RNA isolation step allow a single step in the method.
Paraffin Embedding Protocol for molecular profiling. This Paraffin Embedding Protocol describes the processing of the tissues into sections following ethanol fixation. Molecular profiling (MP) is a technique that is used to visualize the global patterns of RNA expression or protein expression in various cell types and disease processes.