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Cellular and Molecular Life Sciences: CMLS

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https://www.readbyqxmd.com/read/28717874/distinct-functions-of-crumbs-regulating-slit-diaphragms-and-endocytosis-in-drosophila-nephrocytes
#1
Florian Hochapfel, Lucia Denk, Gudrun Mendl, Ulf Schulze, Christine Maaßen, Yulia Zaytseva, Hermann Pavenstädt, Thomas Weide, Reinhard Rachel, Ralph Witzgall, Michael P Krahn
Mammalian podocytes, the key determinants of the kidney's filtration barrier, differentiate from columnar epithelial cells and several key determinants of apical-basal polarity in the conventional epithelia have been shown to regulate podocyte morphogenesis and function. However, little is known about the role of Crumbs, a conserved polarity regulator in many epithelia, for slit-diaphragm formation and podocyte function. In this study, we used Drosophila nephrocytes as model system for mammalian podocytes and identified a conserved function of Crumbs proteins for cellular morphogenesis, nephrocyte diaphragm assembly/maintenance, and endocytosis...
July 17, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28717873/orchestration-of-h3k27-methylation-mechanisms-and-therapeutic-implication
#2
REVIEW
Mei-Ren Pan, Ming-Chuan Hsu, Li-Tzong Chen, Wen-Chun Hung
Histone proteins constitute the core component of the nucleosome, the basic unit of chromatin. Chemical modifications of histone proteins affect their interaction with genomic DNA, the accessibility of recognized proteins, and the recruitment of enzymatic complexes to activate or diminish specific transcriptional programs to modulate cellular response to extracellular stimuli or insults. Methylation of histone proteins was demonstrated 50 years ago; however, the biological significance of each methylated residue and the integration between these histone markers are still under intensive investigation...
July 17, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28717872/stress-induced-changes-in-mirna-biogenesis-and-functioning
#3
REVIEW
Marta Olejniczak, Anna Kotowska-Zimmer, Wlodzimierz Krzyzosiak
MicroRNAs (miRNAs) are small, noncoding RNAs that play key roles in the regulation of cellular homeostasis in eukaryotic organisms. There is emerging evidence that some of these processes are influenced by various forms of cellular stresses, including DNA damage, pathogen invasion or chronic stress associated with diseases. Many reports over the last decade demonstrate examples of stress-induced miRNA deregulation at the level of transcription, processing, subcellular localization and functioning. Moreover, core miRNA biogenesis proteins and their interactions with partners can be selectively regulated in response to stress signaling...
July 17, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28707011/epithelial-cell-senescence-an-adaptive-response-to-pre-carcinogenic-stresses
#4
REVIEW
Corinne Abbadie, Olivier Pluquet, Albin Pourtier
Senescence is a cell state occurring in vitro and in vivo after successive replication cycles and/or upon exposition to various stressors. It is characterized by a strong cell cycle arrest associated with several molecular, metabolic and morphologic changes. The accumulation of senescent cells in tissues and organs with time plays a role in organismal aging and in several age-associated disorders and pathologies. Moreover, several therapeutic interventions are able to prematurely induce senescence. It is, therefore, tremendously important to characterize in-depth, the mechanisms by which senescence is induced, as well as the precise properties of senescent cells...
July 13, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28702760/regulation-of-long-distance-transport-of-mitochondria-along-microtubules
#5
REVIEW
Anna Melkov, Uri Abdu
Mitochondria are cellular organelles of crucial importance, playing roles in cellular life and death. In certain cell types, such as neurons, mitochondria must travel long distances so as to meet metabolic demands of the cell. Mitochondrial movement is essentially microtubule (MT) based and is executed by two main motor proteins, Dynein and Kinesin. The organization of the cellular MT network and the identity of motors dictate mitochondrial transport. Tight coupling between MTs, motors, and the mitochondria is needed for the organelle precise localization...
July 12, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28698933/distinct-effects-on-the-dendritic-arbor-occur-by-microbead-versus-bath-administration-of-brain-derived-neurotrophic-factor
#6
Kate M O'Neill, Munjin Kwon, Katherine E Donohue, Bonnie L Firestein
Proper communication among neurons depends on an appropriately formed dendritic arbor, and thus, aberrant changes to the arbor are implicated in many pathologies, ranging from cognitive disorders to neurodegenerative diseases. Due to the importance of dendritic shape to neuronal network function, the morphology of dendrites is tightly controlled and is influenced by both intrinsic and extrinsic factors. In this work, we examine how brain-derived neurotrophic factor (BDNF), one of the most well-studied extrinsic regulators of dendritic branching, affects the arbor when it is applied locally via microbeads to cultures of hippocampal neurons...
July 11, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28698932/small-molecules-for-reprogramming-and-transdifferentiation
#7
REVIEW
Hua Qin, Andong Zhao, Xiaobing Fu
Pluripotency reprogramming and transdifferentiation induced by transcription factors can generate induced pluripotent stem cells, adult stem cells or specialized cells. However, the induction efficiency and the reintroduction of exogenous genes limit their translation into clinical applications. Small molecules that target signaling pathways, epigenetic modifications, or metabolic processes can regulate cell development, cell fate, and function. In the recent decade, small molecules have been widely used in reprogramming and transdifferentiation fields, which can promote the induction efficiency, replace exogenous genes, or even induce cell fate conversion alone...
July 11, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28674729/expression-of-a-sox1-overlapping-transcript-in-neural-differentiation-and-cancer-models
#8
Azaz Ahmad, Stephanie Strohbuecker, Cristina Tufarelli, Virginie Sottile
SOX1 is a member of the SOXB1 subgroup of transcription factors involved in early embryogenesis, CNS development and maintenance of neural stem cells. The structure and regulation of the human SOX1 locus has been less studied than that of SOX2, another member of the SOXB1 subgroup for which an overlapping transcript has been reported. Here we report that the SOX1 locus harbours a SOX1 overlapping transcript (SOX1-OT), and describe expression, splicing variants and detection of SOX1-OT in different stem and cancer cells...
July 3, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28674728/new-imaging-probes-to-track-cell-fate-reporter-genes-in-stem-cell-research
#9
REVIEW
Piotr Jurgielewicz, Stefan Harmsen, Elizabeth Wei, Michael H Bachmann, Richard Ting, Omer Aras
Cell fate is a concept used to describe the differentiation and development of a cell in its organismal context over time. It is important in the field of regenerative medicine, where stem cell therapy holds much promise but is limited by our ability to assess its efficacy, which is mainly due to the inability to monitor what happens to the cells upon engraftment to the damaged tissue. Currently, several imaging modalities can be used to track cells in the clinical setting; however, they do not satisfy many of the criteria necessary to accurately assess several aspects of cell fate...
July 3, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28674727/cellular-and-molecular-mechanisms-of-alcohol-induced-osteopenia
#10
REVIEW
Zhenhua Luo, Yao Liu, Yitong Liu, Hui Chen, Songtao Shi, Yi Liu
Alcoholic beverages are widely consumed, resulting in a staggering economic cost in different social and cultural settings. Types of alcohol consumption vary from light occasional to heavy, binge drinking, and chronic alcohol abuse at all ages. In general, heavy alcohol consumption is widely recognized as a major epidemiological risk factor for chronic diseases and is detrimental to many organs and tissues, including bones. Indeed, recent findings demonstrate that alcohol has a dose-dependent toxic effect in promoting imbalanced bone remodeling...
July 3, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28669031/experimental-design-and-reporting-standards-for-metabolomics-studies-of-mammalian-cell-lines
#11
REVIEW
Sarah Hayton, Garth L Maker, Ian Mullaney, Robert D Trengove
Metabolomics is an analytical technique that investigates the small biochemical molecules present within a biological sample isolated from a plant, animal, or cultured cells. It can be an extremely powerful tool in elucidating the specific metabolic changes within a biological system in response to an environmental challenge such as disease, infection, drugs, or toxins. A historically difficult step in the metabolomics pipeline is in data interpretation to a meaningful biological context, for such high-variability biological samples and in untargeted metabolomics studies that are hypothesis-generating by design...
July 1, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28669030/v%C3%AE-9v%C3%AE-2-t-cell-activation-by-strongly-agonistic-nucleotidic-phosphoantigens
#12
Morgane Moulin, Javier Alguacil, Siyi Gu, Asmaa Mehtougui, Erin J Adams, Suzanne Peyrottes, Eric Champagne
Human Vγ9Vδ2 T cells can sense through their TCR tumor cells producing the weak endogenous phosphorylated antigen isopentenyl pyrophosphate (IPP), or bacterially infected cells producing the strong agonist hydroxyl dimethylallyl pyrophosphate (HDMAPP). The recognition of the phosphoantigen is dependent on its binding to the intracellular B30.2 domain of butyrophilin BTN3A1. Most studies have focused on pyrophosphate phosphoantigens. As triphosphate nucleotide derivatives are naturally co-produced with IPP and HDMAPP, we analyzed their specific properties using synthetic nucleotides derived from HDMAPP...
July 1, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28667356/low-dose-radiation-accelerates-aging-of-the-t-cell-receptor-repertoire-in-cba-ca-mice
#13
Serge M Candéias, Justyna Mika, Paul Finnon, Tom Verbiest, Rosemary Finnon, Natalie Brown, Simon Bouffler, Joanna Polanska, Christophe Badie
While the biological effects of high-dose-ionizing radiation on human health are well characterized, the consequences of low-dose radiation exposure remain poorly defined, even though they are of major importance for radiological protection. Lymphocytes are very radiosensitive, and radiation-induced health effects may result from immune cell loss and/or immune system impairment. To decipher the mechanisms of effects of low doses, we analyzed the modulation of the T-cell receptor gene repertoire in mice exposed to a single low (0...
June 30, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28656349/structural-determinants-of-a-conserved-enantiomer-selective-carvone-binding-pocket-in-the-human-odorant-receptor-or1a1
#14
Christiane Geithe, Jonas Protze, Franziska Kreuchwig, Gerd Krause, Dietmar Krautwurst
Chirality is a common phenomenon within odorants. Most pairs of enantiomers show only moderate differences in odor quality. One example for enantiomers that are easily discriminated by their odor quality is the carvones: humans significantly distinguish between the spearmint-like (R)-(-)-carvone and caraway-like (S)-(+)-carvone enantiomers. Moreover, for the (R)-(-)-carvone, an anosmia is observed in about 8% of the population, suggesting enantioselective odorant receptors (ORs). With only about 15% de-orphaned human ORs, the lack of OR crystal structures, and few comprehensive studies combining in silico and experimental approaches to elucidate structure-function relations of ORs, knowledge on cognate odorant/OR interactions is still sparse...
June 27, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28656348/pap-reg3a-favors-perineural-invasion-in-pancreatic-adenocarcinoma-and-serves-as-a-prognostic-marker
#15
Jérémy Nigri, Meritxell Gironella, Christian Bressy, Elena Vila-Navarro, Julie Roques, Sophie Lac, Caroline Bontemps, Coraline Kozaczyk, Jérôme Cros, Daniel Pietrasz, Raphaël Maréchal, Jean-Luc Van Laethem, Juan Iovanna, Jean-Baptiste Bachet, Emma Folch-Puy, Richard Tomasini
Pancreatic ductal adenocarcinoma (PDA) is a fatal and insidious malignant disease for which clinicians' tools are restricted by the current limits in knowledge of how tumor and stromal cells act during the disease. Among PDA hallmarks, neural remodeling (NR) and perineural invasion (PNI) drastically influence quality of life and patient survival. Indeed, NR and PNI are associated with neuropathic pain and metastasis, respectively, both of which impact clinicians' decisions and therapeutic options. The aim of this study was to determine the impact and clinical relevance of the peritumoral microenvironment, through pancreatitis-associated protein (PAP/REG3A) expression, on PNI in pancreatic cancer...
June 27, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28646366/endothelial-cell-apoptosis-in-angiogenesis-and-vessel-regression
#16
REVIEW
Emma C Watson, Zoe L Grant, Leigh Coultas
Blood vessel regression is an essential process for ensuring blood vessel networks function at optimal efficiency and for matching blood supply to the metabolic needs of tissues as they change over time. Angiogenesis is the major mechanism by which new blood vessels are produced, but the vessel growth associated with angiogenesis must be complemented by remodeling and maturation events including the removal of redundant vessel segments and cells to fashion the newly forming vasculature into an efficient, hierarchical network...
June 23, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28643167/microbiome-probiotics-and-neurodegenerative-diseases-deciphering-the-gut-brain-axis
#17
REVIEW
Susan Westfall, Nikita Lomis, Imen Kahouli, Si Yuan Dia, Surya Pratap Singh, Satya Prakash
The gut microbiota is essential to health and has recently become a target for live bacterial cell biotherapies for various chronic diseases including metabolic syndrome, diabetes, obesity and neurodegenerative disease. Probiotic biotherapies are known to create a healthy gut environment by balancing bacterial populations and promoting their favorable metabolic action. The microbiota and its respective metabolites communicate to the host through a series of biochemical and functional links thereby affecting host homeostasis and health...
June 22, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28643166/structural-disorder-in-plant-proteins-where-plasticity-meets-sessility
#18
REVIEW
Alejandra A Covarrubias, Cesar L Cuevas-Velazquez, Paulette S Romero-Pérez, David F Rendón-Luna, Caspar C C Chater
Plants are sessile organisms. This intriguing nature provokes the question of how they survive despite the continual perturbations caused by their constantly changing environment. The large amount of knowledge accumulated to date demonstrates the fascinating dynamic and plastic mechanisms, which underpin the diverse strategies selected in plants in response to the fluctuating environment. This phenotypic plasticity requires an efficient integration of external cues to their growth and developmental programs that can only be achieved through the dynamic and interactive coordination of various signaling networks...
June 22, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28643165/molecularly-targeted-therapies-for-p53-mutant-cancers
#19
REVIEW
Dekuang Zhao, William M Tahaney, Abhijit Mazumdar, Michelle I Savage, Powel H Brown
The tumor suppressor p53 is lost or mutated in approximately half of human cancers. Mutant p53 not only loses its anti-tumor transcriptional activity, but also often acquires oncogenic functions to promote tumor proliferation, invasion, and drug resistance. Traditional strategies have been taken to directly target p53 mutants through identifying small molecular compounds to deplete mutant p53, or to restore its tumor suppressive function. Accumulating evidence suggest that cancer cells with mutated p53 often exhibit specific functional dependencies on secondary genes or pathways to survive, providing alternative targets to indirectly treat p53-mutant cancers...
June 22, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28638936/nuclear-receptors-in-neural-stem-progenitor-cell-homeostasis
#20
REVIEW
Dimitrios Gkikas, Matina Tsampoula, Panagiotis K Politis
In the central nervous system, embryonic and adult neural stem/progenitor cells (NSCs) generate the enormous variety and huge numbers of neuronal and glial cells that provide structural and functional support in the brain and spinal cord. Over the last decades, nuclear receptors and their natural ligands have emerged as critical regulators of NSC homeostasis during embryonic development and adult life. Furthermore, substantial progress has been achieved towards elucidating the molecular mechanisms of nuclear receptors action in proliferative and differentiation capacities of NSCs...
June 21, 2017: Cellular and Molecular Life Sciences: CMLS
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