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What are canonical pathways

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https://www.readbyqxmd.com/read/29678830/regulation-of-cell-to-cell-communication-and-cell-wall-integrity-by-a-network-of-map-kinase-pathways-and-transcription-factors-in-neurospora-crassa
#1
Monika S Fischer, Vincent W Wu, Ji E Lee, Ronan C O'Malley, N Louise Glass
Maintenance of cell integrity and cell-to-cell communication are fundamental biological processes. Filamentous fungi, such as Neurospora crassa , depend on communication to locate compatible cells, coordinate cell fusion, and establish a robust hyphal network. Two MAP-Kinase pathways are essential for communication and cell fusion in N. crassa ; the Cell Wall Integrity/MAK-1 pathway and the MAK-2 (signal response) pathway. Previous studies have demonstrated several points of cross talk between the MAK-1 and MAK-2 pathways, which is likely necessary for coordinating chemotropic growth toward an extracellular signal, and then mediating cell fusion...
April 20, 2018: Genetics
https://www.readbyqxmd.com/read/29576082/emerging-themes-in-heterotrimeric-g-protein-signaling-in-plants
#2
REVIEW
Sona Pandey, Anitha Vijayakumar
Heterotrimeric G-proteins are key signaling components involved during the regulation of a multitude of growth and developmental pathways in all eukaryotes. Although the core proteins (Gα, Gβ, Gγ subunits) and their basic biochemistries are conserved between plants and non-plant systems, seemingly different inherent properties of specific components, altered wirings of G-protein network architectures, and the presence of novel receptors and effector proteins make plant G-protein signaling mechanisms somewhat distinct from the well-established animal paradigm...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29504892/comparing-mirna-structure-of-mirtrons-and-non-mirtrons
#3
Igor I Titov, Pavel S Vorozheykin
BACKGROUND: MicroRNAs proceeds through the different canonical and non-canonical pathways; the most frequent of the non-canonical ones is the splicing-dependent biogenesis of mirtrons. We compare the mirtrons and non-mirtrons of human and mouse to explore how their maturation appears in the precursor structure around the miRNA. RESULTS: We found the coherence of the overhang lengths what indicates the dependence between the cleavage sites. To explain this dependence we suggest the 2-lever model of the Dicer structure that couples the imprecisions in Drosha and Dicer...
February 9, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29493888/dual-specificity-phosphatase-dusp6-promotes-endothelial-inflammation-through-inducible-expression-of-icam-1
#4
EDITORIAL
Shu-Fang Hsu, Yu-Bin Lee, Ying-Chu Lee, Ai-Ling Chung, Maria Karmella Apaya, Lie-Fen Shyur, Ching-Feng Cheng, Feng-Ming Ho, Tzu-Ching Meng
Tumor necrosis factor (TNF)-α activates a diverse array of signaling pathways in vascular endothelial cells (ECs), leading to the inflammatory phenotype that contributes to the vascular dysfunction and neutrophil emigration in patients with sepsis. To date, it is not well understood what key regulator might coordinate signaling pathways to achieve inflammatory response in TNF-α-stimulated ECs. This study investigated the role of dual specificity phosphatase-6 (DUSP6) in the regulation of endothelial inflammation...
May 2018: FEBS Journal
https://www.readbyqxmd.com/read/29476342/structural-and-functional-aspects-of-the-interaction-partners-of-the-small-heat-shock-protein-in-synechocystis
#5
Erik G Marklund, Yichen Zhang, Eman Basha, Justin L P Benesch, Elizabeth Vierling
The canonical function of small heat-shock proteins (sHSPs) is to interact with proteins destabilized under conditions of cellular stress. While the breadth of interactions made by many sHSPs is well-known, there is currently little knowledge about what structural features of the interactors form the basis for their recognition. Here, we have identified 83 in vivo interactors of the sole sHSP in the cyanobacterium Synechocystis sp. PCC 6803, HSP16.6, reflective of stable associations with soluble proteins made under heat-shock conditions...
February 23, 2018: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/29462326/secreted-frizzled-related-protein-2-sfrp2-expression-promotes-lesion-proliferation-via-canonical-wnt-signaling-and-indicates-lesion-borders-in-extraovarian-endometriosis
#6
T Heinosalo, M Gabriel, L Kallio, P Adhikari, K Huhtinen, T D Laajala, E Kaikkonen, A Mehmood, P Suvitie, H Kujari, T Aittokallio, A Perheentupa, M Poutanen
STUDY QUESTION: What is the role of SFRP2 in endometriosis? SUMMARY ANSWER: SFRP2 acts as a canonical WNT/CTNNB1 signaling agonist in endometriosis, regulating endometriosis lesion growth and indicating endometriosis lesion borders together with CTNNB1 (also known as beta catenin). WHAT IS KNOWN ALREADY: Endometriosis is a common, chronic disease that affects women of reproductive age, causing pain and infertility, and has significant economic impact on national health systems...
May 1, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29394281/comparative-transcriptomics-reveals-creba-as-a-novel-regulator-of-infection-tolerance-in-d-melanogaster
#7
Katia Troha, Joo Hyun Im, Jonathan Revah, Brian P Lazzaro, Nicolas Buchon
Host responses to infection encompass many processes in addition to activation of the immune system, including metabolic adaptations, stress responses, tissue repair, and other reactions. The response to bacterial infection in Drosophila melanogaster has been classically described in studies that focused on the immune response elicited by a small set of largely avirulent microbes. Thus, we have surprisingly limited knowledge of responses to infection that are outside the canonical immune response, of how the response to pathogenic infection differs from that to avirulent bacteria, or even of how generic the response to various microbes is and what regulates that core response...
February 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29201025/regulation-of-neuroinflammation-what-role-for-the-tumor-necrosis-factor-like-weak-inducer-of-apoptosis-fn14-pathway
#8
REVIEW
Audrey Boulamery, Sophie Desplat-Jégo
Observed in many central nervous system diseases, neuroinflammation (NI) proceeds from peripheral immune cell infiltration into the parenchyma, from cytokine secretion and from oxidative stress. Astrocytes and microglia also get activated and proliferate. NI manifestations and consequences depend on its context and on the acute or chronic aspect of the disease. The tumor necrosis factor-like weak inducer of apoptosis (TWEAK)/Fn14 pathway has been involved in chronic human inflammatory pathologies such as neurodegenerative, autoimmune, or malignant diseases...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29108122/pyroptosis-by-caspase11-4-gasdermin-d-pathway-in-alcoholic-hepatitis-in-mice-and-patients
#9
Elena Khanova, Raymond Wu, Wen Wang, Rui Yan, Yibu Chen, Samuel W French, Cristina Llorente, Stephanie Q Pan, Qihong Yang, Yuchang Li, Raul Lazaro, Charles Ansong, Richard D Smith, Ramon Bataller, Timothy Morgan, Bernd Schnabl, Hidekazu Tsukamoto
Alcoholic hepatitis (AH) continues to be a disease with high mortality and no efficacious medical treatment. Although severe AH is presented as acute on chronic liver failure, what underlies this transition from chronic alcoholic steatohepatitis (ASH) to AH is largely unknown. To address this question, unbiased RNA sequencing and proteomic analyses were performed on livers of the recently developed AH mouse model, which exhibits the shift to AH from chronic ASH upon weekly alcohol binge, and these results are compared to gene expression profiling data from AH patients...
November 6, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29099307/what-makes-ribosomes-tick
#10
Sarah Catherine Mills, Ramya Enganti, Albrecht G von Arnim
In most organisms, gene expression over the course of the day is under the control of the circadian clock. The canonical clock operates as a gene expression circuit that is controlled at the level of transcription, and transcriptional control is also a major clock output. However, rhythmic transcription cannot explain all the observed rhythms in protein accumulation. Although it is clear that rhythmic gene expression also involves RNA processing and protein turnover, until two years ago little was known in any eukaryote about diel dynamics of mRNA translation into protein...
January 2, 2018: RNA Biology
https://www.readbyqxmd.com/read/28920469/the-canonical-way-to-make-a-heart-%C3%AE-catenin-and-plakoglobin-in-heart-development-and-remodeling
#11
REVIEW
Oksana O Piven, Cecilia L Winata
The main mediator of the canonical Wnt pathway, β-catenin, is a major effector of embryonic development, postnatal tissue homeostasis, and adult tissue regeneration. The requirement for β-catenin in cardiogenesis and embryogenesis has been well established. However, many questions regarding the molecular mechanisms by which β-catenin and canonical Wnt signaling regulate these developmental processes remain unanswered. An interesting question that emerged from our studies concerns how β-catenin signaling is modulated through interaction with other factors...
December 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28891639/three-principles-of-diversity-generating-biosynthesis
#12
Wenjia Gu, Eric W Schmidt
Natural products are significant therapeutic agents and valuable drug leads. This is likely owing to their three-dimensional structural complexity, which enables them to form complex interactions with biological targets. Enzymes from natural product biosynthetic pathways show great potential to generate natural product-like compounds and libraries. Many challenges still remain in biosynthesis, such as how to rationally synthesize small molecules with novel structures and how to generate maximum chemical diversity...
October 17, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28855375/shear-stress-induces-noncanonical-autophagy-in-intestinal-epithelial-monolayers
#13
Sun Wook Kim, Jonathan Ehrman, Mok-Ryeon Ahn, Jumpei Kondo, Andrea A Mancheno Lopez, Yun Sik Oh, Xander H Kim, Scott W Crawley, James R Goldenring, Matthew J Tyska, Erin C Rericha, Ken S Lau
Flow of fluids through the gut, such as milk from a neonatal diet, generates a shear stress on the unilaminar epithelium lining the lumen. We report that exposure to physiological levels of fluid shear stress leads to the formation of large vacuoles, containing extracellular contents within polarizing intestinal epithelial cell monolayers. These observations lead to two questions: how can cells lacking primary cilia transduce shear stress, and what molecular pathways support the formation of vacuoles that can exceed 80% of the cell volume? We find that shear forces are sensed by actin-rich microvilli that eventually generate the apical brush border, providing evidence that these structures possess mechanosensing ability...
November 1, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28660093/the-taste-of-caffeine
#14
REVIEW
Rachel L Poole, Michael G Tordoff
Many people avidly consume foods and drinks containing caffeine, despite its bitter taste. Here, we review what is known about caffeine as a bitter taste stimulus. Topics include caffeine's action on the canonical bitter taste receptor pathway and caffeine's action on noncanonical receptor-dependent and -independent pathways in taste cells. Two conclusions are that (1) caffeine is a poor prototypical bitter taste stimulus because it acts on bitter taste receptor-independent pathways, and (2) caffeinated products most likely stimulate "taste" receptors in nongustatory cells...
June 1, 2017: Journal of Caffeine Research
https://www.readbyqxmd.com/read/28588115/hydroxystilbenes-are-monomers-in-palm-fruit-endocarp-lignins
#15
José Carlos Del Río, Jorge Rencoret, Ana Gutiérrez, Hoon Kim, John Ralph
Lignin, the plant cell wall polymer that binds fibers together but makes processing difficult, is traditionally formed from three monomers, the so-called monolignols ( p -coumaryl, coniferyl, and sinapyl alcohols). Recently, we discovered, in grass lignins, a phenolic monomer that falls outside the canonical lignin biosynthetic pathway, the flavone tricin. As we show here, palm fruit (macaúba [ Acrocomia aculeata ], carnauba [ Copernicia prunifera ], and coconut [ Cocos nucifera ]) endocarps contain lignin polymers derived in part from a previously unconsidered class of lignin monomers, the hydroxystilbenes, including the valuable compounds piceatannol and resveratrol...
August 2017: Plant Physiology
https://www.readbyqxmd.com/read/28571891/renin-angiotensin-aldosterone-inhibition-in-the-treatment-of-cardiovascular-disease
#16
REVIEW
Carlos M Ferrario, Adam E Mullick
A collective century of discoveries establishes the importance of the renin angiotensin aldosterone system in maintaining blood pressure, fluid volume and electrolyte homeostasis via autocrine, paracrine and endocrine signaling. While research continues to yield new functions of angiotensin II and angiotensin-(1-7), the gap between basic research and clinical application of these new findings is widening. As data accumulates on the efficacy of angiotensin converting enzyme inhibitors and angiotensin II receptor blockers as drugs of fundamental importance in the treatment of cardiovascular and renal disorders, it is becoming apparent that the achieved clinical benefits is suboptimal and surprisingly no different than what can be achieved with other therapeutic interventions...
November 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27917138/neural-elements-for-predictive-coding
#17
REVIEW
Stewart Shipp
Predictive coding theories of sensory brain function interpret the hierarchical construction of the cerebral cortex as a Bayesian, generative model capable of predicting the sensory data consistent with any given percept. Predictions are fed backward in the hierarchy and reciprocated by prediction error in the forward direction, acting to modify the representation of the outside world at increasing levels of abstraction, and so to optimize the nature of perception over a series of iterations. This accounts for many 'illusory' instances of perception where what is seen (heard, etc...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27713878/erk5-and-cell-proliferation-nuclear-localization-is-what-matters
#18
REVIEW
Nestor Gomez, Tatiana Erazo, Jose M Lizcano
ERK5, the last MAP kinase family member discovered, is activated by the upstream kinase MEK5 in response to growth factors and stress stimulation. MEK5-ERK5 pathway has been associated to different cellular processes, playing a crucial role in cell proliferation in normal and cancer cells by mechanisms that are both dependent and independent of its kinase activity. Thus, nuclear ERK5 activates transcription factors by either direct phosphorylation or acting as co-activator thanks to a unique transcriptional activation TAD domain located at its C-terminal tail...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27665549/unconventional-protein-secretion-in-animal-cells
#19
REVIEW
Fanny Ng, Bor Luen Tang
All eukaryotic cells secrete a range of proteins in a constitutive or regulated manner through the conventional or canonical exocytic/secretory pathway characterized by vesicular traffic from the endoplasmic reticulum, through the Golgi apparatus, and towards the plasma membrane. However, a number of proteins are secreted in an unconventional manner, which are insensitive to inhibitors of conventional exocytosis and use a route that bypasses the Golgi apparatus. These include cytosolic proteins such as fibroblast growth factor 2 (FGF2) and interleukin-1β (IL-1β), and membrane proteins that are known to also traverse to the plasma membrane by a conventional process of exocytosis, such as α integrin and the cystic fibrosis transmembrane conductor (CFTR)...
2016: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27329857/reverse-u-to-c-editing-exceeds-c-to-u-rna-editing-in-some-ferns-a-monilophyte-wide-comparison-of-chloroplast-and-mitochondrial-rna-editing-suggests-independent-evolution-of-the-two-processes-in-both-organelles
#20
Nils Knie, Felix Grewe, Simon Fischer, Volker Knoop
BACKGROUND: RNA editing by C-to-U conversions is nearly omnipresent in land plant chloroplasts and mitochondria, where it mainly serves to reconstitute conserved codon identities in the organelle mRNAs. Reverse U-to-C RNA editing in contrast appears to be restricted to hornworts, some lycophytes, and ferns (monilophytes). A well-resolved monilophyte phylogeny has recently emerged and now allows to trace the side-by-side evolution of both types of pyrimidine exchange editing in the two endosymbiotic organelles...
June 21, 2016: BMC Evolutionary Biology
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