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https://www.readbyqxmd.com/read/28334597/intramyocardial-bronchogenic-cyst-histological-appearance-and-a-review-of-the-literature
#1
Naoki Nishida, Yukiko Hata, Kazuhiro Nomoto
We report histological appearance of a bronchogenic cyst that was incidentally found in a 78-year-old man who died from drowning related to a traumatic accident. The cyst was found in the posterior edge of the interventricular septum and was monolocular with a 5-mm diameter. The cystic wall was not associated with cartilage or the smooth muscle layer, and was lined by ciliated respiratory epithelium. Immunohistochemistry showed that many of these epithelial cells were positive for cytokeratin 7 and thyroid transcription factor-1...
March 12, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28334205/tetrahymena-phagocytic-vesicles-as-ecological-micro-niches-of-phage-transfer
#2
Iqbal Aijaz, Gerald B Koudelka
The microbial communities in natural environments such as soil, pond water, or animal rumens are comprised of a diverse mixture of bacteria and protozoa including ciliates or flagellates. In such microbiomes, a major source of bacterial mortality is grazing by phagocytic protists. Many protists are omnivorous heterotrophs, feeding on a range of different bacterial species. Due to this indiscriminate feeding, different bacterial species can assemble together in the same phagocytic vesicles where can they potentially exchange genetic material...
March 3, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28333390/epithelial-crypts-a-complex-and-enigmatic-olfactory-organ-in-african-and-south-american-lungfish-lepidosireniformes-dipnoi
#3
Carolin Wittmer, Christine Nowack
African lungfish (Protopterus) seem unique among osteognathostomes in possessing a potential vomeronasal organ homolog in form of accessory epithelial crypts within their nasal cavity. Many details regarding structural and functional properties of these crypts are still unexplored. In this study, we reinvestigate the issue and also present the first data on epithelial crypts in the South American lungfish Lepidosiren paradoxa. The nasal cavities of L. paradoxa and Protopterus annectens were studied using histology, scanning electron microscopy, and alcian blue and PAS staining...
March 23, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28318795/mechanisms-of-toxic-action-of-silver-nanoparticles-in-the-protozoan-tetrahymena-thermophila-from-gene-expression-to-phenotypic-events
#4
Katre Juganson, Monika Mortimer, Angela Ivask, Sandra Pucciarelli, Cristina Miceli, Kaja Orupõld, Anne Kahru
Silver nanoparticles (AgNPs) are highly toxic to aquatic organisms, however, there is no consensus whether the toxicity is caused solely by released Ag-ions or also by reactive oxygen species (ROS). Here, the effects of protein-coated AgNPs (14.6 nm, Collargol) were studied on viability, oxidative stress and gene expression levels in wild type strains (CU427 and CU428) of ciliate Tetrahymena thermophila. Viability-based 24 h EC50 values of AgNPs were relatively high and significantly different for the two strains: ∼100 mg/L and ∼75 mg/L for CU427 and CU428, respectively...
March 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28315137/sheep-fed-with-banana-leaf-hay-reduce-ruminal-protozoa-population
#5
Cláudio Eduardo Silva Freitas, Eduardo Robson Duarte, Dorismar David Alves, Isabel Martinele, Marta D'Agosto, Franciane Cedrola, Angélica Alves de Moura Freitas, Franklin Delano Dos Santos Soares, Makenzi Beltran
A ciliate protozoa suppression can reduce methane production increasing the energy efficiency utilization by ruminants. The physicochemical characteristics of rumen fluid and the profile of the rumen protozoa populations were evaluated for sheep fed banana leaf hay in replacement of the Cynodon dactylon cv. vaqueiro hay. A total of 30 male sheep were raised in intensive system during 15 days of adaptation and 63 days of experimental period. The animals were distributed in a completely randomized design that included six replicates of five treatments with replacement levels (0, 25, 50, 75, and 100%) of the grass vaquero for the banana leaf hay...
March 17, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28314218/microfauna-community-during-pulp-and-paper-wastewater-treatment-in-a-unox-system
#6
Katarzyna Bernat, Dorota Kulikowska, Adam Drzewicki
This study characterized the microfauna community during treatment of pulp and paper wastewater in a UNOX system aerated with pure oxygen, and with a high organic loading rate (0.4±0.06kg BOD/kg MLSSday), low sludge retention time (3.73±0.33 day), and high oxygen concentration (≤20mg O2/L) in comparison to municipal treatment systems. In the aeration tank, temperatures were high, averaging 35.7°C (March-May), then 38.9°C (June-August). Effluent quality was acceptable: 180±22mg COD/L, 7.2±2.1mg BOD5/L, and 33±5mg TSS/L...
March 2, 2017: European Journal of Protistology
https://www.readbyqxmd.com/read/28303622/morphology-and-phylogeny-of-the-soil-ciliate-metopus-yantaiensis-n-sp-ciliophora-metopida-with-identification-of-the-intracellular-bacteria
#7
Atef Omar, Qianqian Zhang, Songbao Zou, Jun Gong
The morphology and infraciliature of a new ciliate, Metopus yantaiensis n. sp., discovered in coastal soil of northern China, were investigated. It is distinguished from its congeners by a combination of the following features: nuclear apparatus situated in the preoral dome; 18-21 somatic ciliary rows, of which three extend onto the preoral dome (dome kineties); three to five distinctly elongated caudal cilia, and 21-29 adoral polykinetids. The 18S rRNA genes of this new species and two congeners, M. contortus and M...
March 17, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28301767/progress-in-human-and-tetrahymena-telomerase-structure
#8
Henry Chan, Yaqiang Wang, Juli Feigon
Telomerase is an RNA-protein complex that extends the 3' ends of linear chromosomes, using a unique telomerase reverse transcriptase (TERT) and template in the telomerase RNA (TR), thereby helping to maintain genome integrity. TR assembles with TERT and species-specific proteins, and telomerase function in vivo requires interaction with telomere-associated proteins. Over the past two decades, structures of domains of TR and TERT as well as other telomerase- and telomere-interacting proteins have provided insights into telomerase function...
March 15, 2017: Annual Review of Biophysics
https://www.readbyqxmd.com/read/28292845/lung-organoids-current-uses-and-future-promise
#9
REVIEW
Christina E Barkauskas, Mei-I Chung, Bryan Fioret, Xia Gao, Hiroaki Katsura, Brigid L M Hogan
Lungs are composed of a system of highly branched tubes that bring air into the alveoli, where gas exchange takes place. The proximal and distal regions of the lung contain epithelial cells specialized for different functions: basal, secretory and ciliated cells in the conducting airways and type II and type I cells lining the alveoli. Basal, secretory and type II cells can be grown in three-dimensional culture, with or without supporting stromal cells, and under these conditions they give rise to self-organizing structures known as organoids...
March 15, 2017: Development
https://www.readbyqxmd.com/read/28290555/microbial-communities-of-aquatic-environments-on-heard-island-characterized-by-pyrotag-sequencing-and-environmental-data
#10
Michelle A Allen, Ricardo Cavicchioli
Heard Island in the Southern Ocean is a biological hotspot that is suffering the effects of climate change. Significant glacier retreat has generated proglacial lagoons, some of which are open to the ocean. We used pyrotag sequencing of SSU rRNA genes and environmental data to characterize microorganisms from two pools adjacent to animal breeding areas, two glacial lagoons and Atlas Cove (marine site). The more abundant taxa included Actinobacteria, Bacteroidetes and Proteobacteria, ciliates and picoflagellates (e...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28288756/antiparasitic-efficacy-of-curcumin-from-curcuma-longa-against-ichthyophthirius-multifiliis-in-grass-carp
#11
Yan-Meng Liu, Qi-Zhong Zhang, De-Hai Xu, Yao-Wu Fu, De-Jie Lin, Sheng-Yu Zhou, Jian-Pei Li
Ichthyophthirius multifiliis is a ciliated parasite that elicits great economic losses in aquaculture. In the present study, a polyphenol compound, curcumin, was obtained from the rhizome of Curcuma longa by bioassay-guided isolation based on the efficacy of anti-I. multifiliis theronts. Anti-I. multifiliis efficacy of curcumin was evaluated in vitro and in vivo. Curcumin resulted in 100% mortality of I. multifiliis theronts at a concentration of 1mg/L within 21.7±1.2min and killed all tomonts at 8mg/L within 31...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28286257/grouper-epinephelus-coioides-tcr-signaling-pathway-was-involved-in-response-against-cryptocaryon-irritans-infection
#12
Ze-Xiang Li, Yan-Wei Li, Shun Xu, Yang Xu, Ze-Quan Mo, Xue-Ming Dan, Xiao-Chun Luo
T cell activation is a complicated process accompanying with the activation of T cell receptor (TCR) signaling pathway, which is not well described in teleost fish. The initiation of this pathway depends on the interaction of membrane TCR co-receptors (e.g. CD4/8, CD3 and CD45) and a series of cytoplasmic protein tyrosine kinases (e.g. Lck, Fyn and ZAP70). Cyptocaryon irritans is a ciliate pathogen of marine fish white spot disease causing huge economic lost in marine aquaculture. This parasite can infect fish gill and skin and is considered to be a good pathogen model for fish gill and skin mucosal immunity...
March 7, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28286224/phylogeny-classification-and-diversity-of-choreotrichia-and-oligotrichia-ciliophora-spirotrichea
#13
Luciana F Santoferrara, Viviana V Alder, George B McManus
Ciliated protists in the subclasses Choreotrichia and Oligotrichia are major components of marine plankton. Despite their ecological relevance, there are uncertainties in their systematics and diversity. We retrieved and curated all the GenBank ribosomal DNA (rDNA) sequences from these groups, which were analyzed in two ways. The first approach was based on morphologically-identified sequences (including those of two families and six genera newly studied here by single-cell sequencing), and aimed at improving phylogenetic inferences using concatenated sequences of three rDNA loci...
March 9, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28285259/distribution-of-ciliates-in-intertidal-sediments-across-geographic-distances-a-molecular-view
#14
Feng Zhao, Kuidong Xu
The estimation of the diversity and geographic distribution of protists in particular ciliates has long been an ongoing debate. We estimated the distribution of ciliates in intertidal sediments with geographic distance ranging from 10cm to 1,000km, using high-throughput DNA sequencing. Higher community similarity, in particular that of rare ciliate taxa, occurred between replicates than between sites. Statistical analyses showed that the community dissimilarities of both abundant and moderately abundant ciliates had correlations with geographic distance at the scales of 50m, 200km and 1000km, indicating a distance-decay relationship...
January 19, 2017: Protist
https://www.readbyqxmd.com/read/28283191/ccdc181-is-a-microtubule-binding-protein-that-interacts-with-hook1-in-haploid-male-germ-cells-and-localizes-to-the-sperm-tail-and-motile-cilia
#15
Thomas Schwarz, Barbara Prieler, Johannes A Schmid, Pawel Grzmil, Juergen Neesen
Disruption of murine Hook1 results in a disturbed spermatogenesis and consequently leads to male infertility in mice. Within these mice abnormal sperm development starts with a disorganization of the microtubular manchette in elongating spermatids that leads to an abnormal head shape as well as to distinctive structural changes in the flagella of the sperm. To elucidate Hook1 function in male germ cell differentiation a yeast two-hybrid screen was performed using a murine testicular library, which leads to the identification of several putative Hook1 interacting proteins...
February 20, 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28283070/circular-concatemers-of-ultra-short-dna-segments-produce-regulatory-rnas
#16
Sarah E Allen, Iris Hug, Sylwia Pabian, Iwona Rzeszutek, Cristina Hoehener, Mariusz Nowacki
In the ciliated protozoan Paramecium tetraurelia, Piwi-associated small RNAs are generated upon the elimination of tens of thousands of short transposon-derived DNA segments as part of development. These RNAs then target complementary DNA for elimination in a positive feedback process, contributing to germline defense and genome stability. In this work, we investigate the formation of these RNAs, which we show to be transcribed directly from the short (length mode 27 bp) excised DNA segments. Our data support a mechanism whereby the concatenation and circularization of excised DNA segments provides a template for RNA production...
March 9, 2017: Cell
https://www.readbyqxmd.com/read/28280935/crypt-cell-markers-in-the-olfactory-organ-of-poecilia-reticulata-analysis-and-comparison-with-the-fish-model-danio-rerio
#17
Simone Bettini, Liliana Milani, Maurizio Lazzari, Maria Gabriella Maurizii, Valeria Franceschini
Olfactory crypt neurons have been observed in several bony fishes and chondrichtyans. Although their morphology is uniform in all fish, very few is known about their antigenic properties, usually studied in zebrafish, but quite overlooked in other species. We tested in Poecilia reticulata (guppy) the two antibodies recognized to mark zebrafish crypt cells: while anti-S100 showed an immunohistochemical pattern comparable to what reported in zebrafish, anti-TrkA gave no signal. Western blot analysis revealed that S100-antiserum bound an antigen of expected weight, probably belonging to the S100 family...
March 9, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28273462/negative-regulators-of-an-rnai-heterochromatin-positive-feedback-loop-safeguard-somatic-genome-integrity-in-tetrahymena
#18
Jan H Suhren, Tomoko Noto, Kensuke Kataoka, Shan Gao, Yifan Liu, Kazufumi Mochizuki
RNAi-mediated positive feedback loops are pivotal for the maintenance of heterochromatin, but how they are downregulated at heterochromatin-euchromatin borders is not well understood. In the ciliated protozoan Tetrahymena, heterochromatin is formed exclusively on the sequences that are removed from the somatic genome by programmed DNA elimination, and an RNAi-mediated feedback loop is important for assembling heterochromatin on the eliminated sequences. In this study, we show that the heterochromatin protein 1 (HP1)-like protein Coi6p, its interaction partners Coi7p and Lia5p, and the histone demethylase Jmj1p are crucial for confining the production of small RNAs and the formation of heterochromatin to the eliminated sequences...
March 7, 2017: Cell Reports
https://www.readbyqxmd.com/read/28271209/tgf-%C3%AE-1-impairs-mechanosensation-of-human-osteoblasts-via-hdac6-mediated-shortening-and-distortion-of-primary-cilia
#19
Sabrina Ehnert, Vrinda Sreekumar, Romina H Aspera-Werz, Sahar O Sajadian, Elke Wintermeyer, Gunther H Sandmann, Christian Bahrs, Jan G Hengstler, Patricio Godoy, Andreas K Nussler
Transforming growth factor β (TGF-β) is a critical regulator of bone density owing to its multiple effects on cell growth and differentiation. Recently, we have shown that TGF-β1 effectively blocks bone morphogenetic protein (BMP) induced maturation of osteoblasts by upregulating histone deacetylase (HDAC) activity. The current study aimed at investigating the effect of rhTGF-β1 treatment on the expression of specific HDACs and their cellular effects, e.g., microtubule structures (primary cilia) and mechanosensation...
March 7, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28266547/the-molecular-motor-myosin-va-interacts-with-the-cilia-centrosomal-protein-rpgrip1l
#20
L H P Assis, R M P Silva-Junior, L G Dolce, M R Alborghetti, R V Honorato, A F Z Nascimento, T D Melo-Hanchuk, D M Trindade, C C C Tonoli, C T Santos, P S L Oliveira, R E Larson, J Kobarg, E M Espreafico, P O Giuseppe, M T Murakami
Myosin Va (MyoVa) is an actin-based molecular motor abundantly found at the centrosome. However, the role of MyoVa at this organelle has been elusive due to the lack of evidence on interacting partners or functional data. Herein, we combined yeast two-hybrid screen, biochemical studies and cellular assays to demonstrate that MyoVa interacts with RPGRIP1L, a cilia-centrosomal protein that controls ciliary signaling and positioning. MyoVa binds to the C2 domains of RPGRIP1L via residues located near or in the Rab11a-binding site, a conserved site in the globular tail domain (GTD) from class V myosins...
March 7, 2017: Scientific Reports
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