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https://www.readbyqxmd.com/read/28449243/pathologic-features-of-mycobacteriosis-in-naturally-infected-syngnathidae-and-novel-transcriptome-assembly-in-association-with-disease
#1
S B Fogelson, M D Fast, J Leary, A C Camus
Syngnathidae (seahorses, seadragons and pipefish) suffer significant losses from non-tuberculous mycobacteria. However, they produce markedly different lesions in response to the disease compared to other teleost species, notably infrequent granuloma formation. This study evaluated 270 syngnathid fish, from which 92 were diagnosed with mycobacteriosis by histopathology, culture or both. Microscopic lesions variably consisted of random foci of coagulative necrosis in multiple organs, containing high numbers of free bacteria and large aggregates or sheets of macrophages with cytoplasm laden with acid-fast bacilli...
April 27, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28449226/an-integrated-network-analysis-identifies-how-arcab-enables-metabolic-oscillations-in-the-nitric-oxide-detoxification-network-of-escherichia-coli
#2
Sarah A Sacco, Kristin J Adolfsen, Mark P Brynildsen
The virulences of many pathogens depend on their abilities to detoxify the immune antimicrobial nitric oxide (NO•). The functions of bacterial NO• detoxification machinery depend on oxygen (O2 ), with O2 inhibiting some enzymes, whereas others use it as a substrate. Previously, Escherichia coli NO• detoxification was found to be highly attenuated under microaerobic conditions and metabolic oscillations were observed. The oscillations in [NO•] and [O2 ] were found to result from the inhibitory action of NO• on aerobic respiration, the catalytic inactivation of NO• by Hmp (an NO• dioxygenase), and an imbalanced competition for O2 between Hmp and cytochrome terminal oxidase activity...
April 27, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28449081/the-coxiella-burnetii-type-ivb-secretion-system-t4bss-component-dota-is-released-secreted-during-infection-of-host-cells-and-during-in-vitro-growth-in-a-t4bss-dependent-manner
#3
Brandon E Luedtke, Saugata Mahapatra, Erika I Lutter, Edward I Shaw
Coxiella burnetii is a Gram-negative intracellular pathogen and is the causative agent of the zoonotic disease Q-fever. To cause disease, C. burnetii requires a functional type IVB secretion system (T4BSS) to transfer effector proteins required for the establishment and maintenance of a membrane bound parasitophorous vacuole (PV) and further modulation of host cell process. However, it is not clear how the T4BSS interacts with the PV membrane since neither a secretion pilus nor an extracellular pore forming apparatus has not been described...
April 25, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28447247/the-role-of-peripheral-myelin-protein-2-in-remyelination
#4
Mark Stettner, Jennifer Zenker, Fabian Klingler, Fabian Szepanowski, Hans-P Hartung, Anne K Mausberg, Christoph Kleinschnitz, Roman Chrast, Bernd C Kieseier
The protein component of the myelin layer is essential for all aspects of peripheral nerves, and its deficiency can lead to structural and functional impairment. The presence of peripheral myelin protein 2 (P2, PMP2, FABP8, M-FABP) in Schwann cells has been known for decades and shown recently to be involved in the lipid homeostasis in the peripheral neural system. However, its precise role during de- and remyelination has yet to be elucidated. To this end, we assessed remyelination after sciatic nerve crush injury in vivo, and in an experimental de/remyelination ex vivo myelinating culture model in P2-deficient (P2 (-/-) ) and wild-type (WT) animals...
April 26, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28447177/yeast-rna-extract-suppresses-human-osteoclast-resorption-in-vitro
#5
Melissa D Cantley, K D Rainsford, David R Haynes
AIMS: The aim of this short study was to test the combinations of RNA extracts (both the connective tissue extracts-cartilage and synovia along with yeast extract) found in natural ribonucleotide extract Osteochondrin S (OST) on human osteoclast formation and activity in vitro. METHODS: In vitro human osteoclasts were treated with the RNA extracts (cartilage, synovia and yeast) at concentrations equivalent to those in OST starting from day 7 of the culture. A tartrate resistant acid phosphatase stain (TRAP) was used to indicate osteoclast formation and activity assessed by determining area of dentine resorption...
April 26, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28446616/early-immune-responses-are-independent-of-rgc-dysfunction-in-glaucoma-with-complement-component-c3-being-protective
#6
Jeffrey M Harder, Catherine E Braine, Pete A Williams, Xianjun Zhu, Katharine H MacNicoll, Gregory L Sousa, Rebecca A Buchanan, Richard S Smith, Richard T Libby, Gareth R Howell, Simon W M John
Various immune response pathways are altered during early, predegenerative stages of glaucoma; however, whether the early immune responses occur secondarily to or independently of neuronal dysfunction is unclear. To investigate this relationship, we used the Wld(s) allele, which protects from axon dysfunction. We demonstrate that DBA/2J.Wld(s) mice develop high intraocular pressure (IOP) but are protected from retinal ganglion cell (RGC) dysfunction and neuroglial changes that otherwise occur early in DBA/2J glaucoma...
April 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28445500/sf3b1-is-a-stress-sensitive-splicing-factor-that-regulates-both-hsf1-concentration-and-activity
#7
Karen S Kim Guisbert, Eric Guisbert
The heat shock response (HSR) is a well-conserved, cytoprotective stress response that activates the HSF1 transcription factor. During severe stress, cells inhibit mRNA splicing which also serves a cytoprotective function via inhibition of gene expression. Despite their functional interconnectedness, there have not been any previous reports of crosstalk between these two pathways. In a genetic screen, we identified SF3B1, a core component of the U2 snRNP subunit of the spliceosome, as a regulator of the heat shock response in Caenorhabditis elegans...
2017: PloS One
https://www.readbyqxmd.com/read/28444679/membranes-derived-from-human-umbilical-cord-wharton-s-jelly-stem-cells-as-novel-bioengineered-tissue-like-constructs
#8
B D Jaimes-Parra, I Garzón, V Carriel, D Durand-Herrera, M A Martín-Piedra, J M García, M C Sánchez-Quevedo, M Alaminos, A Campos
Cell-derived matrices were recently described as novel biomaterials generated by human cells allowed to grow and synthetize their own extracellular matrix in culture. In the present work, we generated and evaluated a novel tissue-like substitute (WDM) consisting of a membrane derived from cultured human Wharton's jelly stem cells. WDM were evaluated ex vivo and in vivo by histochemistry and immunohistochemistry for several mesenchymal cell markers and fibrillar and non-fibrillar extracellular matrix components...
April 26, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28441444/contexts-of-occurrence-of-child-malnutrition-in-the-district-of-villaguay-entre-r%C3%A3-os-argentina-a-multivariate-analysis
#9
María Laura Bergel Sanchís, María Florencia Cesani, Evelia Edith Oyhenart
The analysis of nutritional status is anthropologically important to address the complex interaction of biological, social, political, economic and cultural factors. To deepen the knowledge about contexts of occurrence of child malnutrition, we analyzed nutritional status in relation to socio-environmental conditions of residence in children between three and six years from Villaguay, Entre Ríos, Argentina. We performed a cross-sectional study of 1,435 school children of both sexes. Body weight and height were measured and prevalence of low height/age (LH/A), low weight/age (LW/A), low BMI/age (LBMI/A), overweight (Ow) and obesity (Ob) was calculated using World Health Organization reference charts...
2017: PloS One
https://www.readbyqxmd.com/read/28440509/modulation-of-mmp-2-and-9-secretion-by-cytokines-inducers-and-inhibitors-in-human-melanoma-a-2058-cells
#10
M Waheed Roomi, Tatiana Kalinovsky, Aleksandra Niedzwiecki, Matthias Rath
Melanoma, an extremely aggressive cancer, causes the most skin cancer-related deaths, due to metastasis to other areas of the body, such as lymph nodes, lungs, liver, brain or bone. It is characterized by high levels of matrix metalloproteinase (MMP)-2 and -9 secretions that degrade the extracellular matrix and basement membrane, allowing cancer cells to spread to distal organs. Various cytokines, mitogens, growth factors, inducers and inhibitors control MMP activities. We investigated the roles of these in regulation of MMP-2 and -9 in human melanoma A-2058 cells...
April 24, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28438991/differentiation-of-v2a-interneurons-from-human-pluripotent-stem-cells
#11
Jessica C Butts, Dylan A McCreedy, Jorge Alexis Martinez-Vargas, Frederico N Mendoza-Camacho, Tracy A Hookway, Casey A Gifford, Praveen Taneja, Linda Noble-Haeusslein, Todd C McDevitt
The spinal cord consists of multiple neuronal cell types that are critical to motor control and arise from distinct progenitor domains in the developing neural tube. Excitatory V2a interneurons in particular are an integral component of central pattern generators that control respiration and locomotion; however, the lack of a robust source of human V2a interneurons limits the ability to molecularly profile these cells and examine their therapeutic potential to treat spinal cord injury (SCI). Here, we report the directed differentiation of CHX10(+) V2a interneurons from human pluripotent stem cells (hPSCs)...
April 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28438703/multilayered-membranes-with-tuned-well-arrays-to-be-used-as-regenerative-patches
#12
Nádia I Martins, Maria P Sousa, Catarina A Custódio, Vânia C Pinto, Paulo J Sousa, Graça Minas, Franck Cleymand, João F Mano
Membranes have been explored as patches in tissue repair and regeneration, most of them presenting a flat geometry or a patterned texture at the nano/micrometer scale. Herein, a new concept of a flexible membrane featuring well arrays forming pore-like environments to accommodate cell culture is proposed. The processing of such membranes using polysaccharides is based on the production of multilayers using the layer-by-layer methodology over a patterned PDMS substrate. The detached multilayered membrane exhibits a layer of open pores at one side and a total thickness of 38 ± 2...
April 21, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28435021/the-mtorc2-pkc-pathway-sustains-compensatory-insulin-secretion-of-pancreatic-%C3%AE-cells-in-response-to-metabolic-stress
#13
Yun Xie, Canqi Cui, Aifang Nie, Yan Wang, Qicheng Ni, Yun Liu, Qinglei Yin, Hongli Zhang, Yong Li, Qidi Wang, Yanyun Gu, Guang Ning
BACKGROUND: Compensation of the pancreatic β cell functional mass in response to metabolic stress is key to the pathogenesis of Type 2 Diabetes. The mTORC2 pathway governs fuel metabolism and β cell functional mass. It is unknown whether mTORC2 is required for regulating metabolic stress-induced β cell compensation. METHODS: We challenged four-week-old β-cell-specific Rictor (a key component of mTORC2)-knockout mice with a high fat diet (HFD) for 4weeks and measured metabolic and pancreatic morphological parameters...
April 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28434946/hyperglycemia-induced-renal-p2x7-receptor-activation-enhances-diabetes-related-injury
#14
Robert I Menzies, John W R Booth, John J Mullins, Matthew A Bailey, Frederick W K Tam, Jill T Norman, Robert J Unwin
Diabetes is a leading cause of renal disease. Glomerular mesangial expansion and fibrosis are hallmarks of diabetic nephropathy and this is thought to be promoted by infiltration of circulating macrophages. Monocyte chemoattractant protein-1 (MCP-1) has been shown to attract macrophages in kidney diseases. P2X7 receptors (P2X7R) are highly expressed on macrophages and are essential components of pro-inflammatory signaling in multiple tissues. Here we show that in diabetic patients, renal P2X7R expression is associated with severe mesangial expansion, impaired glomerular filtration (≤40ml/min/1...
April 20, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28434795/near-eastern-plant-domestication-a-history-of-thought
#15
REVIEW
Shahal Abbo, Avi Gopher
The Agricultural Revolution and plant domestication in the Near East (among its components) have fascinated generations of scholars. Here, we narrate the history of ideas underlying plant domestication research since the late 19th century. Biological and cultural perspectives are presented through two prevailing models: one views plant domestication as a protracted, unconscious evolutionary mutualistic (noncentric) process. The second advocates a punctuated, knowledge-based human initiative (centric). We scrutinize the research landscape while assessing the underlying evolutionary and cultural mechanisms...
April 20, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28433565/inhibitory-effects-of-pine-nodule-extract-and-its-component-sj-2-on-acetylcholine-induced-catecholamine-secretion-and-synthesis-in-bovine-adrenal-medullary-cells
#16
Xiaojia Li, Takafumi Horishita, Yumiko Toyohira, Hui Shao, Jie Bai, Haixia Bo, Xinbo Song, Shin Ishikane, Yukari Yoshinaga, Noriaki Satoh, Masato Tsutsui, Nobuyuki Yanagihara
Extract of pine nodules (matsufushi) formed by bark proliferation on the surface of trees of Pinus tabulaeformis or Pinus massoniana has been used as an analgesic for joint pain, rheumatism, neuralgia, dysmenorrhea and other complaints in Chinese traditional medicine. Here we report the effects of matsufushi extract and its components on catecholamine secretion and synthesis in cultured bovine adrenal medullary cells. We found that matsufushi extract (0.0003-0.005%) and its component, SJ-2 (5-hydroxy-3-methoxy-trans-stilbene) (0...
April 7, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28433430/complementary-effect-of-hydroquinone-and-retinoic-acid-on-corneocyte-desquamation-with-their-combination-use
#17
Kyung Ah Cheong, Tae Ryong Lee, Ai-Young Lee
BACKGROUND: Retinoic acid (RA) enhances skin-lightening capabilities of hydroquinone (HQ), at least in part, by facilitating desquamation which leads to increase penetration of HQ. The desquamation also affects skin irritation levels. The mechanism of RA-induced desquamation, however, has not been completely explored and no such data has been available for HQ uses. OBJECTIVE: To examine the role of HQ, RA, and their combination in the desquamation. METHODS: Primary cultured normal human keratinocytes, which were treated with HQ and/or RA in presence or absence of serine-specific inhibitor Kazal type5 (SPINK5)/lympho-epithelial Kazal-type-related inhibitor (LEKTI) knockdown or recombinant human SPINK5/LEKTI, and biopsied skin samples applied with HQ or RA were examined...
April 7, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28432272/establishment-of-an-in-vitro-culture-model-of-theca-cells-from-hierarchical-follicles-in-ducks
#18
Xiang Gan, da Chen, Yan Deng, Junsong Yuan, Bo Kang, Jiamin Qiu, Wenqiang Sun, Chunchun Han, Jiwei Hu, Liang Li, Jiwen Wang
Theca cells, including theca interna cells and theca externa cells, are vital components of ovarian follicles. The aim of this study is to identify a reliable method for the in vitro culture of theca cells from duck ovarian hierarchical (F4-F2) follicles. We improved the method for cell separation by using trypsin to further remove granular cells, and we increased the concentration of fetal bovine serum used in in vitro culture to improve cytoactivity. Cell antibody immunofluorescence showed that all inoculated cells could be stained by the CYP17A1/19A1 antibody but not by the FSHR antibody, which could stain granulosa cells...
April 21, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28431847/guideline-compliance-and-clinical-outcomes-among-patients-with-staphylococcus-aureus-bacteremia-with-infectious-diseases-consultation-in-addition-to-antimicrobial-stewardship-directed-review
#19
Kevin Buehrle, Jennifer Pisano, Zhe Han, Natasha N Pettit
OBJECTIVE: Previous studies have shown infectious diseases consultation (IDC) for Staphylococcus aureus bacteremia (SAB) improves management and outcomes. The influence of IDC on outcomes for SAB in addition to an antimicrobial stewardship program (ASP) review for adult inpatients with SAB has not been evaluated. The purpose of this study was to investigate the effect of IDC on SAB management with concomitant ASP review and resulting outcomes. METHODS: Adult inpatients with SAB admitted December 2012-October 2014 were included...
April 18, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28431181/protective-effect-of-mesenchymal-stem-cells-against-the-development-of-intracranial-aneurysm-rupture-in-mice
#20
Atsushi Kuwabara, Jia Liu, Yoshinobu Kamio, Airan Liu, Michael T Lawton, Jae-Woo Lee, Tomoki Hashimoto
BACKGROUND: Mesenchymal stem cells (MSCs) are multipotent stem or stromal cells found in multiple tissues. Intravenous MSC injections have been used to treat various diseases with an inflammatory component in animals and humans. Inflammation is emerging as a key component of pathophysiology of intracranial aneurysms. Modulation of inflammation by MSCs may affect sustained inflammatory processes that lead to aneurysmal rupture. OBJECTIVE: To assess the effect of MSCs on the development of aneurysm rupture using a mouse model...
April 19, 2017: Neurosurgery
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