Cell Biology

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    Protocols in Current Issue
    Plaque Assay to Determine Invasion and Intercellular Dissemination of Shigella flexneri in TC7 Human Intestinal Epithelial Cells
    Authors:  Atin Sharma and Andrea Puhar, date: 07/05/2019, view: 192, Q&A: 0
    Shigella flexneri invades the epithelial cells lining the gut lumen and replicates intracellularly. The specialized Type III Secretion System (T3SS) and its effector proteins, encoded on a large virulence plasmid, assist the bacterium to ...
    Gentamicin Protection Assay to Determine the Number of Intracellular Bacteria during Infection of Human TC7 Intestinal Epithelial Cells by Shigella flexneri
    Authors:  Atin Sharma and Andrea Puhar, date: 07/05/2019, view: 233, Q&A: 0
    Shigella flexneri is an intracellular bacterial pathogen that gains access to the gut epithelium using a specialized Type III Secretion System (T3SS). Various determinants mediating this invasive infection have been experimentally verified ...
    Optogenetic Inactivation of Transcription Factors in the Early Embryo of Drosophila
    Authors:  Stephen L. McDaniel and Melissa M. Harrison, date: 07/05/2019, view: 236, Q&A: 0
    The early embryo of Drosophila melanogaster exists as a rapidly dividing syncytium of nuclei that are transcriptionally silent. Maternally deposited factors are required to awaken the genome and assist in the transition from maternal to ...
    Adhesive and Cohesive Peel Force Measurement of Human Airway Mucus
    In health, the high-speed airflow associated with cough represents a vital backup mechanism for clearing accumulated mucus from our airways. However, alterations in the mucus layer in cystic fibrosis (CF) and chronic obstructive pulmonary disease ...
    In vitro Infection of Primary Human Monocytes with HIV-1
    Authors:  Patrick O’Connell, Yong-Hui Zheng, Andrea Amalfitano and Yasser A. Aldhamen, date: 07/05/2019, view: 211, Q&A: 0
    Monocyte infection by HIV-1 is an important component of chronic HIV pathogenesis. Following infection by HIV-1, monocytes are able to cross the blood brain barrier and set up a viral reservoir in the central nervous system. Additionally, in the ...
    An Efficient Approach for RNA Extraction from Boar Sperm and Seminal Plasma
    Authors:  Vanmathy R. Kasimanickam and Ramanathan K. Kasimanickam, date: 07/05/2019, view: 179, Q&A: 0
    Despite transcriptional silencing in mature sperm and cytoplasmic expulsion of RNA during the final sperm maturation process, thousands of RNAs have been successfully identified in ejaculated sperm. Although most of RNAs’ function is still unknown, ...
    Morphological Evaluation of Wound Healing Events in the Excisional Wound Healing Model in Rats
    Skin wound healing is a complex process involving different events such as blood coagulation, inflammation, new blood vessels formation, and extracellular matrix deposition. These events can be observed by using histology techniques. However, the ...
    CRISPR/Cas9 + AAV-mediated Intra-embryonic Gene Knocking in Mice
    Intra-embryo genome editing by CRISPR/Cas9 has enabled rapid generation of gene knockout animals. However, large fragment knock-in directly into embryos’ genome is still difficult, especially without microinjection of donor DNA. Viral vectors are ...
    The Chick Chorioallantoic Membrane (CAM) Assay as a Three-dimensional Model to Study Autophagy in Cancer Cells
    The chick chorioallantoic membrane (CAM) is an extra-embryonic organ and thus well accessible for seeding and harvesting 3D cell cultures. Samples from CAM assays are suitable for protein and gene expression analysis as well as for ...
    Plaque Assay to Determine Invasion and Intercellular Dissemination of Shigella flexneri in TC7 Human Intestinal Epithelial Cells
    Authors:  Atin Sharma and Andrea Puhar, date: 07/05/2019, view: 192, Q&A: 0
    [Abstract] Shigella flexneri invades the epithelial cells lining the gut lumen and replicates intracellularly. The specialized Type III Secretion System (T3SS) and its effector proteins, encoded on a large virulence plasmid, assist the bacterium to gain access to the cytosol. Thereafter Shigella disseminates to neighboring cells in an ...
    Gentamicin Protection Assay to Determine the Number of Intracellular Bacteria during Infection of Human TC7 Intestinal Epithelial Cells by Shigella flexneri
    Authors:  Atin Sharma and Andrea Puhar, date: 07/05/2019, view: 233, Q&A: 0
    [Abstract] Shigella flexneri is an intracellular bacterial pathogen that gains access to the gut epithelium using a specialized Type III Secretion System (T3SS). Various determinants mediating this invasive infection have been experimentally verified using the classical gentamicin protection assay presented here. In this assay epithelial cell lines ...
    Optogenetic Inactivation of Transcription Factors in the Early Embryo of Drosophila
    Authors:  Stephen L. McDaniel and Melissa M. Harrison, date: 07/05/2019, view: 236, Q&A: 0
    [Abstract] The early embryo of Drosophila melanogaster exists as a rapidly dividing syncytium of nuclei that are transcriptionally silent. Maternally deposited factors are required to awaken the genome and assist in the transition from maternal to zygotic control of development. Because many of these essential factors are maternally deposited and ...
    Adhesive and Cohesive Peel Force Measurement of Human Airway Mucus
    [Abstract] In health, the high-speed airflow associated with cough represents a vital backup mechanism for clearing accumulated mucus from our airways. However, alterations in the mucus layer in cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD) leads to the mucus layer adhered to the airway surfaces, representing the nidus of chronic lung ...
    In vitro Infection of Primary Human Monocytes with HIV-1
    Authors:  Patrick O’Connell, Yong-Hui Zheng, Andrea Amalfitano and Yasser A. Aldhamen, date: 07/05/2019, view: 211, Q&A: 0
    [Abstract] Monocyte infection by HIV-1 is an important component of chronic HIV pathogenesis. Following infection by HIV-1, monocytes are able to cross the blood brain barrier and set up a viral reservoir in the central nervous system. Additionally, in the setting of chronic HIV-1 infection, monocytes can become activated either directly through HIV-1 ...
    An Efficient Approach for RNA Extraction from Boar Sperm and Seminal Plasma
    Authors:  Vanmathy R. Kasimanickam and Ramanathan K. Kasimanickam, date: 07/05/2019, view: 179, Q&A: 0
    [Abstract] Despite transcriptional silencing in mature sperm and cytoplasmic expulsion of RNA during the final sperm maturation process, thousands of RNAs have been successfully identified in ejaculated sperm. Although most of RNAs’ function is still unknown, it is suggested that sperm RNAs have a vital biological role in fertilization and post-fertilization ...
    Morphological Evaluation of Wound Healing Events in the Excisional Wound Healing Model in Rats
    [Abstract] Skin wound healing is a complex process involving different events such as blood coagulation, inflammation, new blood vessels formation, and extracellular matrix deposition. These events can be observed by using histology techniques. However, the lack of the standardization of such parameters impacts on the reproducibility of results. Here, we ...
    CRISPR/Cas9 + AAV-mediated Intra-embryonic Gene Knocking in Mice
    [Abstract] Intra-embryo genome editing by CRISPR/Cas9 has enabled rapid generation of gene knockout animals. However, large fragment knock-in directly into embryos’ genome is still difficult, especially without microinjection of donor DNA. Viral vectors are good transporters of knock-in donor DNA for cell lines, but seemed unsuitable for pre-implantation ...
    The Chick Chorioallantoic Membrane (CAM) Assay as a Three-dimensional Model to Study Autophagy in Cancer Cells
    [Abstract] The chick chorioallantoic membrane (CAM) is an extra-embryonic organ and thus well accessible for seeding and harvesting 3D cell cultures. Samples from CAM assays are suitable for protein and gene expression analysis as well as for immuno-histochemical studies. Here we present the CAM assay as a possible model to study autophagy in different types ...
    Detachment Procedure of Bacteria from Atmospheric Particles for Flow-cytometry Counting
    Authors:  Carolina M. Araya, Alberto Cazorla and Isabel Reche, date: 06/20/2019, view: 373, Q&A: 0
    [Abstract] The protocol separates bacteria from atmospheric particles, obtaining with greater precision their abundance in the atmospheric deposition. This procedure is similar to the one used to separate bacteria in streambed sediments. The detachment procedure consists of a chemical treatment with sodium pyrophosphate and Tween 20 and a physical treatment ...



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