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https://www.readbyqxmd.com/read/29138120/recessive-mutation-in-tetraspanin-cd151-causes-kindler-syndrome-like-epidermolysis-bullosa-with-multi-systemic-manifestations-including-nephropathy
#1
Hassan Vahidnezhad, Leila Youssefian, Amir Hossein Saeidian, Hamid Reza Mahmoudi, Andrew Touati, Maryam Abiri, Abdol-Mohammad Kajbafzadeh, Sophia Aristodemou, Lu Liu, John A McGrath, Adam Ertel, Eric Londin, Ariana Kariminejad, Sirous Zeinali, Paolo Fortina, Jouni Uitto
Epidermolysis bullosa (EB) is caused by mutations in as many as 19 distinct genes. We have developed a next-generation sequencing (NGS) panel targeting genes known to be mutated in skin fragility disorders, including tetraspanen CD151 expressed in keratinocytes at the dermal-epidermal junction. The NGS panel was applied to a cohort of 92 consanguineous families of unknown subtype of EB. In one family, a homozygous donor splice site mutation in CD151 (NM_139029; c.351+2T>C) at the exon 5/intron 5 border was identified, and RT-PCR and whole transcriptome analysis by RNA-seq confirmed deletion of the entire exon 5 encoding 25 amino acids...
November 11, 2017: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29121670/quantitative-membrane-proteomics-reveals-a-role-for-tetraspanin-enriched-microdomains-during-entry-of-human-cytomegalovirus
#2
Kasinath Viswanathan, Marieke C Verweij, Nessy John, Daniel Malouli, Klaus Früh
Human cytomegalovirus (HCMV) depends on and modulates multiple host cell membrane proteins during each stage of the viral life cycle. To gain a global view of the impact of HCMV-infection on membrane proteins, we analyzed HCMV-induced changes in the abundance of membrane proteins in fibroblasts using stable isotope labeling with amino acids (SILAC), membrane fractionation and protein identification by two-dimensional liquid chromatography and tandem mass spectrometry. This systematic approach revealed that CD81, CD44, CD98, caveolin-1 and catenin delta-1 were down-regulated during infection whereas GRP-78 was up-regulated...
2017: PloS One
https://www.readbyqxmd.com/read/29120745/nrp2-and-cd63-are-host-factors-for-lujo-virus-cell-entry
#3
Matthijs Raaben, Lucas T Jae, Andrew S Herbert, Ana I Kuehne, Sarah H Stubbs, Yi-Ying Chou, Vincent A Blomen, Tomas Kirchhausen, John M Dye, Thijn R Brummelkamp, Sean P Whelan
Arenaviruses cause fatal hemorrhagic disease in humans. Old World arenavirus glycoproteins (GPs) mainly engage α-dystroglycan as a cell-surface receptor, while New World arenaviruses hijack transferrin receptor. However, the Lujo virus (LUJV) GP does not cluster with New or Old World arenaviruses. Using a recombinant vesicular stomatitis virus containing LUJV GP as its sole attachment and fusion protein (VSV-LUJV), we demonstrate that infection is independent of known arenavirus receptor genes. A genome-wide haploid genetic screen identified the transmembrane protein neuropilin 2 (NRP2) and tetraspanin CD63 as factors for LUJV GP-mediated infection...
November 8, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/29116068/-hydrogel-microchip-as-a-tool-for-studying-exosomes-in-human-serum
#4
V I Butvilovskaya, A A Tikhonov, E N Savvateeva, A A Ragimov, E L Salimov, S A Voloshin, D V Sidorov, M A Chernichenko, A P Polyakov, M M Filushin, M V Tsybulskaya, A Yu Rubina
Exosomes are cell-derived vesicles that are secreted by both normal and cancer cells. Over the last decade, a few studies have revealed that exosomes cross talk and/or influence major tumor-related pathways such as angiogenesis and metastasis involving many cell types within the tumor microenvironment. The protein composition of the membrane of an exosome reflects that of the membrane of the cell of origin. Because of this, tumor-derived exosomes differ from exosomes that are derived from normal cells. The detection of tumor exosomes and analysis of their molecular composition hold promise for diagnosis and prognosis of cancer...
September 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/29107170/cellular-and-molecular-mechanisms-underlying-planar-cell-polarity-pathway-contributions-to-cancer-malignancy
#5
REVIEW
Kaceauy VanderVorst, Jason Hatakeyama, Anastasia Berg, Hyun Lee, Kermit L Carraway
While the mutational activation of oncogenes drives tumor initiation and growth by promoting cellular transformation and proliferation, increasing evidence suggests that the subsequent re-engagement of largely dormant developmental pathways contributes to cellular phenotypes associated with the malignancy of solid tumors. Genetic studies from a variety of organisms have defined many of the components that maintain epithelial planar cell polarity (PCP), or cellular polarity in the axis orthogonal to the apical-basal axis...
October 26, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/29090272/a-new-panel-of-epitope-mapped-monoclonal-antibodies-recognising-the-prototypical-tetraspanin-cd81
#6
Joe Grove, Ke Hu, Michelle J Farquhar, Margaret Goodall, Lucas Walker, Mohammed Jamshad, Heidi E Drummer, Roslyn M Bill, Peter Balfe, Jane A McKeating
Background: Tetraspanins are small transmembrane proteins, found in all higher eukaryotes, that compartmentalize cellular membranes through interactions with partner proteins. CD81 is a prototypical tetraspanin and contributes to numerous physiological and pathological processes, including acting as a critical entry receptor for hepatitis C virus (HCV). Antibody engagement of tetraspanins can induce a variety of effects, including actin cytoskeletal rearrangements, activation of MAPK-ERK signaling and cell migration...
2017: Wellcome Open Research
https://www.readbyqxmd.com/read/29073095/broad-role-for-ybx1-in-defining-the-small-noncoding-rna-composition-of-exosomes
#7
Matthew J Shurtleff, Jun Yao, Yidan Qin, Ryan M Nottingham, Morayma M Temoche-Diaz, Randy Schekman, Alan M Lambowitz
RNA is secreted from cells enclosed within extracellular vesicles (EVs). Defining the RNA composition of EVs is challenging due to their coisolation with contaminants, lack of knowledge of the mechanisms of RNA sorting into EVs, and limitations of conventional RNA-sequencing methods. Here we present our observations using thermostable group II intron reverse transcriptase sequencing (TGIRT-seq) to characterize the RNA extracted from HEK293T cell EVs isolated by flotation gradient ultracentrifugation and from exosomes containing the tetraspanin CD63 further purified from the gradient fractions by immunoisolation...
October 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29065179/comparative-proteome-and-peptidome-analysis-of-the-cephalic-fluid-secreted-by-arapaima-gigas-teleostei-osteoglossidae-during-and-outside-parental-care
#8
COMPARATIVE STUDY
Lucas S Torati, Hervé Migaud, Mary K Doherty, Justyna Siwy, Willian Mullen, Pedro E C Mesquita, Amaya Albalat
Parental investment in Arapaima gigas includes nest building and guarding, followed by a care provision when a cephalic fluid is released from the parents' head to the offspring. This fluid has presumably important functions for the offspring but so far its composition has not been characterised. In this study the proteome and peptidome of the cephalic secretion was studied in parental and non-parental fish using capillary electrophoresis coupled to mass spectrometry (CE-MS) and GeLC-MS/MS analyses. Multiple comparisons revealed 28 peptides were significantly different between males and parental males (PC-males), 126 between females and parental females (PC-females), 51 between males and females and 9 between PC-males and PC-females...
2017: PloS One
https://www.readbyqxmd.com/read/29065158/correction-tetraspanin-6-a-novel-regulator-of-hippocampal-synaptic-transmission-and-long-term-plasticity
#9
Isabel H Salas, Zsuzsanna Callaerts-Vegh, Amaia M Arranz, Francesc X Guix, Rudi D'Hooge, José A Esteban, Bart De Strooper, Carlos G Dotti
[This corrects the article DOI: 10.1371/journal.pone.0171968.].
2017: PloS One
https://www.readbyqxmd.com/read/29038349/correction-how-tetraspanins-shape-endothelial-and-leukocyte-nano-architecture-during-inflammation
#10
Jonas Franz, Marco Tarantola, Christoph Riethmüller
No abstract text is available yet for this article.
October 15, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/29030127/a-method-for-the-isolation-and-enrichment-of-purified-bovine-milk-exosomes
#11
Kanchan Vaswani, Yong Qin Koh, Fatema B Almughlliq, Hassendrini N Peiris, Murray D Mitchell
Exosomes are nanovesicles that play important roles in intercellular communication as they carry information to target cells. Isolation of high purity exosomes will aid in studying the exosomal cargo and quantity as well as how cell-specific messages are carried. We describe a new method incorporating size exclusion chromatography (SEC) to enrich milk-derived exosomes from extracellular vesicles (EVs). This involved the initial isolation of EVs from bovine milk via milk processing and ultracentrifugation; followed by a new method to enrich exosomes using SEC...
October 10, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29019351/hot-news-exosomes-as-new-players-in-hiv-pathogenesis-new-data-from-the-ias-2017
#12
Eva Poveda, Michael L Freeman
Exosomes are nanovesicles that can be released into the extracellular medium by different cell types and are considered an important system of intercellular communication. In some instances, on secretion, exosomes break down and release their content into the extracellular space. Alternatively, intact exosomes can interact with other cells and discharge their content directly into the target cell cytoplasm. Exosomes are rich in endosome-associated proteins (i.e., the tetraspanin family) but also carry different molecules in their lumen including proteins, RNAs (i...
October 2017: AIDS Reviews
https://www.readbyqxmd.com/read/28978485/an-essential-role-for-the-tetraspanin-lhfpl4-in-the-cell-type-specific-targeting-and-clustering-of-synaptic-gabaa-receptors
#13
Elizabeth C Davenport, Valentina Pendolino, Georgina Kontou, Thomas P McGee, David F Sheehan, Guillermo López-Doménech, Mark Farrant, Josef T Kittler
Inhibitory synaptic transmission requires the targeting and stabilization of GABAA receptors (GABAARs) at synapses. The mechanisms responsible remain poorly understood, and roles for transmembrane accessory proteins have not been established. Using molecular, imaging, and electrophysiological approaches, we identify the tetraspanin LHFPL4 as a critical regulator of postsynaptic GABAAR clustering in hippocampal pyramidal neurons. LHFPL4 interacts tightly with GABAAR subunits and is selectively enriched at inhibitory synapses...
October 3, 2017: Cell Reports
https://www.readbyqxmd.com/read/28977990/exosomal-tetraspanins-mediate-cancer-metastasis-by-altering-host-microenvironment
#14
Jun Lu, Jun Li, Shuo Liu, Teng Wang, Alessandro Ianni, Eva Bober, Thomas Braun, Rong Xiang, Shijing Yue
The metastases of malignant tumors develop through a cascade of events. The establishment of a pre-metastatic micro-environment is initiated by communication between tumors and host. Exosomes come into focus as the most potent intercellular communicators playing a pivotal role in this process. Cancer cells release exosomes into the extracellular environment prior to metastasis. Tetraspanin is a type of 4 times transmembrane proteins. It may be involved in cell motility, adhesion, morphogenesis, as well as cell and vesicular membrane fusion...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28959386/cerebrospinal-fluid-extracellular-vesicle-enrichment-for-protein-biomarker-discovery-in-neurological-disease-multiple-sclerosis
#15
Joanne L Welton, Samantha Loveless, Timothy Stone, Chris von Ruhland, Neil P Robertson, Aled Clayton
The discovery of disease biomarkers, along with the use of "liquid biopsies" as a minimally invasive source of biomarkers, continues to be of great interest. In inflammatory diseases of the central nervous system (CNS), cerebrospinal fluid (CSF) is the most obvious biofluid source. Extracellular vesicles (EVs) are also present in CSF and are thought to be potential "biomarker treasure chests". However, isolating these CSF-derived EVs remains challenging. This small-scale pilot study developed and tested a protocol to enrich for CSF-EVs, both in relapsing remitting multiple sclerosis (RRMS) CSF and controls...
2017: Journal of Extracellular Vesicles
https://www.readbyqxmd.com/read/28956068/amyloid-precursor-protein-products-concentrate-in-a-subset-of-exosomes-specifically-endocytosed-by-neurons
#16
Karine Laulagnier, Charlotte Javalet, Fiona J Hemming, Mathilde Chivet, Gaëlle Lachenal, Béatrice Blot, Christine Chatellard, Rémy Sadoul
Amyloid beta peptide (Aβ), the main component of senile plaques of Alzheimer's disease brains, is produced by sequential cleavage of amyloid precursor protein (APP) and of its C-terminal fragments (CTFs). An unanswered question is how amyloidogenic peptides spread throughout the brain during the course of the disease. Here, we show that small lipid vesicles called exosomes, secreted in the extracellular milieu by cortical neurons, carry endogenous APP and are strikingly enriched in CTF-α and the newly characterized CTF-η...
September 27, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28954890/cd151-expression-is-associated-with-a-hyperproliferative-t-cell-phenotype
#17
Lillian Seu, Christopher Tidwell, Laura Timares, Alexandra Duverger, Frederic H Wagner, Paul A Goepfert, Andrew O Westfall, Steffanie Sabbaj, Olaf Kutsch
The tetraspanin CD151 is a marker of aggressive cell proliferation and invasiveness for a variety of cancer types. Given reports of CD151 expression on T cells, we explored whether CD151 would mark T cells in a hyperactivated state. Consistent with the idea that CD151 could mark a phenotypically distinct T cell subset, it was not uniformly expressed on T cells. CD151 expression frequency was a function of the T cell lineage (CD8 > CD4) and a function of the memory differentiation state (naive T cells < central memory T cells < effector memory T cells < T effector memory RA(+) cells)...
November 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28900422/rab3a-bound-cd63-is-degraded-and-rab3a-free-cd63-is-incorporated-into-hiv-1-particles
#18
Yoshinao Kubo, Hiroshi Masumoto, Mai Izumida, Katsura Kakoki, Hideki Hayashi, Toshifumi Matsuyama
CD63, a member of the tetraspanin family, is involved in virion production by human immunodeficiency virus type 1 (HIV-1), but its mechanism is unknown. In this study, we showed that a small GTP-binding protein, Rab3a, interacts with CD63. When Rab3a was exogenously expressed, the amounts of CD63 decreased in cells. The Rab3a-mediated reduction of CD63 was suppressed by lysosomal and proteasomal inhibitors. The amount of CD63 was increased by reducing the endogenous Rab3a level using a specific shRNA. These results indicate that Rab3a binds to CD63 to induce the degradation of CD63...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28881668/the-metastasis-suppressor-cd82-kai1-regulates-cell-migration-and-invasion-via-inhibiting-tgf-%C3%AE-1-smad-signaling-in-renal-cell-carcinoma
#19
Jundong Zhu, Chao Liang, Yibo Hua, Chenkui Miao, Jianzhong Zhang, Aiming Xu, Kai Zhao, Shouyong Liu, Ye Tian, Huiyu Dong, Chao Zhang, Pu Li, Shifeng Su, Chao Qin, Zengjun Wang
The tetraspanin KAI1/CD82 was identified as a tumor metastasis suppressor that downregulated in various malignant cell types. However, the function of CD82 and its underlying anti-metastasis role in renal cell carcinoma (RCC) is still unraveled. Here, we investigated the expression of CD82 in RCC and explored its regulatory mechanism in RCC cell lines. We found that CD82 was down-regulated in RCC tissues and cells and its expression was significantly associated with histological grade(p=0.041), tumour stage (p=0...
August 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28880937/differential-expression-of-tetraspanin-superfamily-members-in-dendritic-cell-subsets
#20
Malou Zuidscherwoude, Kuntal Worah, Alie van der Schaaf, Sonja I Buschow, Annemiek B van Spriel
Dendritic cells (DCs), which are essential for initiating immune responses, are comprised of different subsets. Tetraspanins organize dendritic cell membranes by facilitating protein-protein interactions within the so called tetraspanin web. In this study we analyzed expression of the complete tetraspanin superfamily in primary murine (CD4+, CD8+, pDC) and human DC subsets (CD1c+, CD141+, pDC) at the transcriptome and proteome level. Different RNA and protein expression profiles for the tetraspanin genes across human and murine DC subsets were identified...
2017: PloS One
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