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Cell 7 - PLOS

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Last Updated: 10 September 2022

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Design and validation of HIV peptide pools for detection of HIV-specific CD4 + and CD8 + T cells

The HIV molecular immunology database's CD4+ and CD8+ HIV epitopes were converted into Class I and Class II HIV megapools. We analyzed HIV reactions in HIV-prevention and post-ART patients and compared these results to 15 controls without HIV. We calculated HIV-specific total CD4+, memory CD4+, circulating T follicular helper, total CD8+ and memory CD8+ T cells using the Activation Induced Marker assay, assay. We also compared the Class I and Class II HIV MPs to commercially available HIV gag peptide pools. Overall, HIV-specific CD4+ T cells were detected in 21/35 HIV positive samples and 0/15 HIV negative samples. In 17/35 HIV positive samples and 0/15 HIV negative samples, a HIV-specific CD8+ T cells were discovered in an HIV-specific CD8+ T cell.

Source link: https://doi.org/10.1371/journal.pone.0268370


Imp interacts with Lin28 to regulate adult stem cell proliferation in the Drosophila intestine

Cell proliferation, fate determination, and differentiation are all important aspects of stem cell function, which include stem cell function: cell proliferation, migration, fate decision, and differentiation. RNA binding proteins are essential components of the regulatory network that regulate gene expression in stem cells to ensure self-renewal and long-term homeostasis in adult tissues. Although the role of several RBPs may have been described in various stem cell populations, the way these cells function and are organized in genetic networks remains largely elusive. In intestinal stem cells and progenitors in the adult Drosophila midgut, the conserved RNA binding protein IGF2 mRNA binding protein is present in intestinal stem cells and progenitors. Imp is shown to be required cell autonomously to maintain stem cell proliferative function under normal epithelial turnover and tissue damage, according to our findings. Imp and Lin28 are part of a larger gene regulatory network that regulates gene expression in ISCs and is required to maintain epithelial homeostasis, according to Altogether. Author summary: Stem cells are absolutely necessary to maintain healthy organs. For these reasons, several devices regulate stem cell function, which leads to functional daughter cells. We used the Drosophila fruitfly as a genetically amenable experimental model to investigate the role of a conserved protein, the IGF2 mRNA binding protein, in adult intestinal stem cell formation. We discovered that stem cell proliferation under normal conditions and in response to tissue damage is necessary for stem cell proliferation under normal conditions and in reaction to tissue injury.

Source link: https://doi.org/10.1371/journal.pgen.1010385


Echovirus 11 infection induces pyroptotic cell death by facilitating NLRP3 inflammasome activation

Echovirus 11 is a positive-strand RNA virus related to the genus Enterovirus of the family Picornaviridae, the genus Enterovirus. We isolated a clinical strain of ECHO 11 from the stools of an ECHO 11-infected newborn with necrotizing hepatitis in this research. Moreover, we reported that ECHO 11 promoted IL-1u03b2 secretion and pyroptosis in cells and mouse bone marrow-derived macrophages. To facilitate the inflammasome complex assembly, the ECHO 11 2B protein was required for NLRP3 inflammasome activation by interacting with NLRP3 to enable the inflammasome complex assembly. In the murine liver, the expression of ECHO 11 2B has also triggered NLRP3 inflammasome. Our results indicate a way by which ECHO 11 promotes inflammatory reactions by activating NLRP3 inflammasome, giving us new insight into the pathogenesis of ECHO 11 infection. Human echovirus 11 belongs to the Enterovirus genus from the family Picornavirida, and it can cause acute hepatitis in infants with elevated morbidity and mortality. However, the evidence regarding the pathogenesis of ECHO 11 infection is limited, although the evidence regarding the pathogenesis of ECHO 11 infection is limited. This work is the first demonstration that ECHO 11 can promote inflammatory responses by activating NLRP3 inflammasome and pyroptosis. ECHO 11-encoded 2B protein was discovered to induce NLRP3 inflammation in cells and in vivo, and the interaction between 2B and NLRP3 was essential for inflammasome complex assembly. In addition, we discovered that 2Bs of other enteroviruses, including enterovirus 71, coxsackievirus A16, and CVB3, could cause NLRP3 inflammasome and interact with NLRP3. Our results reveal a mechanism by which ECHO 11 promotes inflammatory responses and demonstrates a novel function of ECHO 11 2B.

Source link: https://doi.org/10.1371/journal.ppat.1010787


Bioaffinity-based surface immobilization of antibodies to capture endothelial colony-forming cells

The clinic's endothelialization was markedly improved when it was found by endothelial cell capture stents with surface-immobilized antibodies. However, most current antibody-based stent surface modification plans, on the other hand, depend on antibody adsorption or direct conjugation by amino or carboxyl groups, which leads to poor control of antibody surface concentration and/or molecular orientation, as well as cell bioavailability for cell capture. The protein G polypeptide graft was more efficient than surface adsorption in immobilizing antibodies at a high density based on fluorophore-labeled secondary antibody detection, as well as endothelial colony-forming cells cell capture by anti-CD144 antibodies.

Source link: https://doi.org/10.1371/journal.pone.0269316


Epitope-Evaluator: An interactive web application to study predicted T-cell epitopes

Multiple immunoinformatic techniques have been developed to detect T-cell epitopes from protein amino acid sequences for various key histocompatibility complex alleles. These prediction tools produce hundreds of potential peptide candidates that need further processing, but these products are either not graphical or not friendly to non-programming users. We present Epitope-Evaluator, a web tool that was part of the Shiny/R framework, for interactively analyzing predicted T-cell epitopes. The Epitope-Evaluator needs as input the fasta file of protein sequences as well as the output prediction file from any predictor. We found that the HLA-B*40, HLA-B*27:05, and HLA-B*07:02 detected fewer epitopes from the SARS-CoV-2 proteome than any other MHC Class I alleles using Epitope-Evaluator. We also found shared epitopes between Delta, Omicron, and Wuhan Spike variants, as well as variant-specific epitopes.

Source link: https://doi.org/10.1371/journal.pone.0273577


Tamoxifen-resistant breast cancer cells exhibit reactivity with Wisteria floribunda agglutinin

However, little is known about glycosylation as the source of breast cancer cell resistance to endocrine therapy. After electrophoretic separation of the glycoproteins, we performed lectin blotting experiments to show differential lectin binding to cell glycoproteins. The membrane fractions of tamoxifen-resistant breast cancer cells, according to a tamoxifen-resistant breast cancer cells' Lectin microarray results, demonstrated elevated adherence to Wisteria floribunda agglutinin relative to tamoxifen-sensitive cells. Different WFA binding was observed by Glycoproteins, and mass spectrometry findings indicated several membrane glycoproteins, including CD166 and integrin beta-1 as candidates contributing to elevated WFA binding. In patients with distant metastasis during tamoxifen therapy that had developed during tamoxifen therapy that had not relapsed patients, frequent WFA staining was more evident in clinical samples. Hence, glycans identified by WFA can be useful as predictive markers to determine the tamoxifen-resistant and relapse-prone subset of estrogen receptor-positive breast cancer patients with a tamoxifen-resistant breast cancer patients.

Source link: https://doi.org/10.1371/journal.pone.0273513


Nicotinic receptor components of amyloid beta 42 proteome regulation in human neural cells

Alzheimer's disease is often associated with chronic neurodegeneration, accompanied by elevated synthesis of the neurotoxic peptide amyloid-beta 1u201342 in the brain. Extracellular Au03b242 binds to many cell surface receptors, including the human nic acetylcholine receptor, and promotes cell death pathways, which can lead to cell death. The nAChR, which is now u03b17, is regarded as a promising drug target for therapy of neurodegenerative diseases such as AD. The results support evidence that mitochondrial proteins play an Ae03b242 responses and suggest potential mechanisms of toxicity-mediated by nAChR.

Source link: https://doi.org/10.1371/journal.pone.0270479


CCT196969 effectively inhibits growth and survival of melanoma brain metastasis cells

Despite recent advances in the treatment of melanoma brain metastasis, therapy resistance, and disease relapse are all unsolved issues. CCT1969696969 is a SRC family kinase and Raf proto-oncogene, serine/threonine kinase inhibitor with documented results in primary melanoma cell lines in vitro and in vivo. We investigated the effects of CCT19696969696969 in several melanoma brain metastasis cell lines using in vitro cell line assays. More in vivo studies could be conducted to determine the treatment effectiveness of CCT196969 in patients with treatment-nau00efve and persistent melanoma brain metastasis.

Source link: https://doi.org/10.1371/journal.pone.0273711


TMExplorer: A tumour microenvironment single-cell RNAseq database and search tool

Many cancer types are available scRNA-seq results from many cancer groups, but we don't have a comprehensive database to gather and display related TME data in a simple and usable format. The TMExplorer allows for the investigation of the TME using scRNA-seq in a way that is streamlined and allows for easy integration into already existing scRNA-seq analysis pipelines.

Source link: https://doi.org/10.1371/journal.pone.0272302


Fezf2-positive fork cell-like neurons in the mouse insular cortex

The fork cell and von Economo neuron, which are present in the insular cortex and/or the anterior cingulate cortex, are identified by their specific morphologies. Their shapes are not pyramidal; the fork cell contains two primary apical dendrites; and the von Economo neurons are spindle-shaped; We here inquire whether equivalent neurons exist in the mouse's insular cortex. In human, Fezf2 has been found to be highly expressed in these morphologically distinct neurons, and, therefore, we investigated the detailed morphology of Fezf2-positive neurons in the mouse brain. Though von Economo-like neurons were not identified, Fezf2-positive fork cell-like neurons with two recognizable apical dendrites were discovered, two typical apical dendrites were still missing, Fezf2-positive fork cell-like neurons with two distinctive apical dendrites. Such neurons are also known as holding neurons in this website. Several chemicals, including neuromedin B and gastrin-releasing peptides that are known to be localized in mouse fork cells and/or von Economo cells in human, were localized in mouse embryo cells and/or von Economo cells.

Source link: https://doi.org/10.1371/journal.pone.0274170

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions