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Niche construction

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https://www.readbyqxmd.com/read/27885671/recruited-monocytic-myeloid-derived-suppressor-cells-promote-the-arrest-of-tumor-cells-in-the-premetastatic-niche-through-an-il-1%C3%AE-mediated-increase-in-e-selectin-expression
#1
Huifang Shi, Juechao Zhang, Xiaoqing Han, Huihan Li, Mingshu Xie, Yingying Sun, Wenguang Liu, Xueqing Ba, Xianlu Zeng
The tumor premetastatic niche initiated by primary tumors is constructed by multiple molecular factors and cellular components and provides permissive condition that allows circulating tumor cells to successfully metastasize. Myeloid-derived suppressor cells (MDSCs), a population of immature cells in pathological conditions, play a critical role in the formation of the premetastatic niche. However, few researches are focused on the function of monocytic MDSCs (mo-MDSCs), a subtype of MDSCs, in the construction of the niche...
November 25, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27879115/preface
#2
Avner Friedman, Mirosław Lachowicz, Urszula Ledzewicz, Monika Joanna Piotrowska, Zuzanna Szymanska
This volume was inspired by the topics presented at the international conference "Micro and Macro Systems in Life Sciences" which was held on Jun 8-12, 2015 in Będlewo, Poland. System biology is an approach which tries to understand how micro systems, at the molecular and cellular levels, affect macro systems such as organs, tissue and populations. Thus it is not surprising that a major theme of this volume evolves around cancer and its treatment. Articles on this topic include models for tumor induced angiogenesis, without and with delays, metastatic niche of the bone marrow, drug resistance and metronomic chemotherapy, and virotherapy of glioma...
February 1, 2017: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/27867830/niche-construction-social-cognition-and-language-hypothesizing-the-human-as-the-production-of-place
#3
Oliver Davies
New data is emerging from evolutionary anthropology and the neuroscience of social cognition on our species-specific hyper-cooperation (HC). This paper attempts an integration of third-person archaeological and second-person, neuroscientific perspectives on the structure of HC, through a post-Ricoeurian development in hermeneutical phenomenology. We argue for the relatively late evolution of advanced linguistic consciousness (ALC) (Hiscock in Biological Theory 9:27-41, 2014), as a reflexive system based on the 'in-between' or 'cognitive system' as reported by Vogeley et al...
2016: Culture and Brain
https://www.readbyqxmd.com/read/27859289/correlational-selection-on-personality-and-social-plasticity-morphology-and-social-context-determine-behavioural-effects-on-mating-success
#4
Pierre-Olivier Montiglio, Tina W Wey, Ann T Chang, Sean Fogarty, Andrew Sih
1.Despite a central line of research aimed at quantifying relationships between mating success and sexually dimorphic traits (e.g., ornaments), individual variation in sexually selected traits often explains only a modest portion of the variation in mating success. 2.Another line of research suggests that a significant portion of the variation in mating success observed in animal populations could be explained by correlational selection, where the fitness advantage of a given trait depends on other components of an individual's phenotype and/or its environment...
November 18, 2016: Journal of Animal Ecology
https://www.readbyqxmd.com/read/27853610/population-growth-as-a-driver-of-initial-domestication-in-eastern-north-america
#5
Elic M Weitzel, Brian F Codding
The transition to agriculture is one of the most significant events in human prehistory; yet, explaining why people initially domesticated plants and animals remains a contentious research problem in archaeology. Two competing hypotheses dominate current debates. The first draws on niche construction theory to emphasize how intentional management of wild resources should lead to domestication regardless of Malthusian population-resource imbalances. The second relies on models from behavioural ecology (BE) to highlight how individuals should only exert selective pressure on wild resources during times of population-resource imbalance...
August 2016: Royal Society Open Science
https://www.readbyqxmd.com/read/27848947/genetic-variation-in-social-environment-construction-influences-the-development-of-aggressive-behavior-in-drosophila-melanogaster
#6
J B Saltz
Individuals are not merely subject to their social environments; they choose and create them, through a process called social environment (or social niche) construction. When genotypes differ in social environment-constructing behaviors, different genotypes are expected to experience different social environments. As social experience often affects behavioral development, quantitative genetics and psychology theories predict that genetic variation in social environment construction should have an important role in determining phenotypic variation; however, this hypothesis has not been tested directly...
November 16, 2016: Heredity
https://www.readbyqxmd.com/read/27836730/tenascin-c-in-the-matrisome-of-neural-stem-and-progenitor-cells
#7
REVIEW
Andreas Faissner, Lars Roll, Ursula Theocharidis
The extracellular matrix consists of glycoproteins, proteoglycans and complex glycan structures that form the matrisome. Increasing evidence points to important functional roles of the ECM during development, plasticity and regeneration of the CNS. In particular, the ECM is an important constituent of the molecular microenvironment of the neural stem cell niches. While substantial evidence suggests that growth factors, cytokines and morphogens play important regulatory roles in the niche, the biological significance of the ECM has been less well studied...
November 8, 2016: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/27806131/the-listeria-monocytogenes-pasta-kinase-prka-and-its-substrate-yvck-are-required-for-cell-wall-homeostasis-metabolism-and-virulence
#8
Daniel A Pensinger, Kyle M Boldon, Grischa Y Chen, William J B Vincent, Kyle Sherman, Meng Xiong, Adam J Schaenzer, Emily R Forster, Jörn Coers, Rob Striker, John-Demian Sauer
Obstacles to bacterial survival and replication in the cytosol of host cells, and the mechanisms used by bacterial pathogens to adapt to this niche are not well understood. Listeria monocytogenes is a well-studied Gram-positive foodborne pathogen that has evolved to invade and replicate within the host cell cytosol; yet the mechanisms by which it senses and responds to stress to survive in the cytosol are largely unknown. To assess the role of the L. monocytogenes penicillin-binding-protein and serine/threonine associated (PASTA) kinase PrkA in stress responses, cytosolic survival and virulence, we constructed a ΔprkA deletion mutant...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27801902/fitness-costs-restrict-niche-expansion-by-generalist-niche-constructing-pathogens
#9
Julien Lang, Armelle Vigouroux, Abbas El Sahili, Anthony Kwasiborski, Magali Aumont-Nicaise, Yves Dessaux, Jacqui Anne Shykoff, Solange Moréra, Denis Faure
We investigated the molecular and ecological mechanisms involved in niche expansion, or generalism, versus specialization in sympatric plant pathogens. Nopaline-type and octopine-type Agrobacterium tumefaciens engineer distinct niches in their plant hosts that provide different nutrients: nopaline or octopine, respectively. Previous studies revealed that nopaline-type pathogens may expand their niche to also assimilate octopine in the presence of nopaline, but consequences of this phenomenon on pathogen dynamics in planta were not known...
November 1, 2016: ISME Journal
https://www.readbyqxmd.com/read/27783641/environmental-niche-modelling-of-phlebotomine-sand-flies-and-cutaneous-leishmaniasis-identifies-lutzomyia-intermedia-as-the-main-vector-species-in-southeastern-brazil
#10
Viviane Coutinho Meneguzzi, Claudiney Biral Dos Santos, Gustavo Rocha Leite, Blima Fux, Aloísio Falqueto
Cutaneous leishmaniasis (CL) is caused by a protozoan of the genus Leishmania and is transmitted by sand flies. The state of Espírito Santo (ES), an endemic area in southeast Brazil, has shown a considerably high prevalence in recent decades. Environmental niche modelling (ENM) is a useful tool for predicting potential disease risk. In this study, ENM was applied to sand fly species and CL cases in ES to identify the principal vector and risk areas of the disease. Sand flies were collected in 466 rural localities between 1997 and 2013 using active and passive capture...
2016: PloS One
https://www.readbyqxmd.com/read/27781162/beech-cupules-as-keystone-structures-for-soil-fauna
#11
Nereida Melguizo-Ruiz, Gerardo Jiménez-Navarro, Jordi Moya-Laraño
Facilitative or positive interactions are ubiquitous in nature and play a fundamental role in the configuration of ecological communities. In particular, habitat modification and niche construction, in which one organism locally modifies abiotic conditions and favours other organisms by buffering the effects of adverse environmental factors, are among the most relevant facilitative interactions. In line with this, 'keystone structures', which provide resources, refuge, or advantageous services decisive for other species, may allow the coexistence of various species and thus considerably contribute to diversity maintenance...
2016: PeerJ
https://www.readbyqxmd.com/read/27778301/footbinding-industrialization-and-evolutionary-explanation-an-empirical-illustration-of-niche-construction-and-social-inheritance
#12
Melissa J Brown
The incorporation of niche construction theory (NCT) and epigenetics into an extended evolutionary synthesis (EES) increases the explanatory power of evolutionary analyses of human history. NCT allows identification of distinct social inheritance and cultural inheritance and can thereby account for how an existing-but-dynamic social system yields variable influences across individuals and also how these individuals' microlevel actions can feed back to alter the dynamic heterogeneously across time and space...
October 24, 2016: Human Nature: An Interdisciplinary Biosocial Perspective
https://www.readbyqxmd.com/read/27775895/hierarchical-assembly-of-bioactive-amphiphilic-molecule-pairs-into-supramolecular-nanofibril-self-supportive-scaffolds-for-stem-cell-differentiation
#13
Zhe Wang, Fuwu Zhang, Zhantong Wang, Xiao Fu, Albert Jin, Bryant C Yung, Jing Fan, Xiangyu Yang, Gang Niu, Xiaoyuan Chen
Molecular design of biomaterials with unique features reca-pitulating nature's niche to influence biological activities has been a prolific area of investigation in chemistry and material science. The extracellular matrix (ECM) provides a wealth of bioactive molecules in supporting cell proliferation, migra-tion and differentiation. The well-patterned fibril and inter-twining architecture of the ECM profoundly influences cell behavior and development. Inspired by those features from the ECM, we attempted to integrate essential biological fac-tors from the ECM to design bioactive molecules to construct artificial self-supportive ECM mimics to advance stem cell culture...
October 24, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27770630/3d-printed-complex-tissue-construct-using-stem-cell-laden-decellularized-extracellular-matrix-bioinks-for-cardiac-repair
#14
Jinah Jang, Hun-Jun Park, Seok-Won Kim, Heejin Kim, Ju Young Park, Soo Jin Na, Hyeon Ji Kim, Moon Nyeo Park, Seung Hyun Choi, Sun Hwa Park, Sung Won Kim, Sang-Mo Kwon, Pum-Joon Kim, Dong-Woo Cho
Stem cell therapy is a promising therapeutic method for the treatment of ischemic heart diseases; however, some challenges prohibit the efficacy after cell delivery due to hostile microenvironment of the injured myocardium. 3D printed pre-vascularized stem cell patch can enhance the therapeutic efficacy for cardiac repair through promotion of rapid vascularization after patch transplantation. In this study, stem cell-laden decellularized extracellular matrix bioinks are used in 3D printing of pre-vascularized and functional multi-material structures...
October 14, 2016: Biomaterials
https://www.readbyqxmd.com/read/27756426/exosomes-in-tumor-microenvironment-novel-transporters-and-biomarkers
#15
Zhen Wang, Jun-Qiang Chen, Jin-Lu Liu, Lei Tian
Tumor microenvironment (TME) plays an integral part in the biology of cancer, participating in tumor initiation, progression, and response to therapy. Exosome is an important part of TME. Exosomes are small vesicles formed in vesicular bodies with a diameter of 30-100 nm and a classic "cup" or "dish" morphology. They can contain microRNAs, mRNAs, DNA fragments and proteins, which are shuttled from a donor cell to recipient cells. Exosomes secreted from tumor cells are called tumor-derived (TD) exosomes. There is emerging evidence that TD exosomes can construct a fertile environment to support tumor proliferation, angiogenesis, invasion and premetastatic niche preparation...
October 19, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27739046/positive-feedback-loops-between-inflammatory-bone-and-cancer-cells-during-metastatic-niche-construction
#16
Ardeshir Kianercy, Kenneth J Pienta
Bone, which includes several cell populations and numerous cytokines and chemokines that provide cell-cell signaling, is a common destination for many cancer metastases. Bone metastasis skews this signaling to develop vicious cycles between immune, bone and cancer populations that lead to abnormal bone remodeling during cancer niche construction. Temporal models utilize positive feedback systems as an integrative tool providing insights into the rate-limiting processes that determine multiple stages of the bone metastasis...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27694985/3d-bioprinting-matrices-with-controlled-pore-structure-and-release-function-guide-in-vitro-self-organization-of-sweat-gland
#17
Nanbo Liu, Sha Huang, Bin Yao, Jiangfan Xie, Xu Wu, Xiaobing Fu
3D bioprinting matrices are novel platforms for tissue regeneration. Tissue self-organization is a critical process during regeneration that implies the features of organogenesis. However, it is not clear from the current evidences whether 3D printed construct plays a role in guiding tissue self-organization in vitro. Based on our previous study, we bioprinted a 3D matrix as the restrictive niche for direct sweat gland differentiation of epidermal progenitors by different pore structure (300-μm or 400-μm nozzle diameters printed) and reported a long-term gradual transition of differentiated cells into glandular morphogenesis occurs within the 3D construct in vitro...
October 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27681624/mir-155-regulated-molecular-network-orchestrates-cell-fate-in-the-innate-and-adaptive-immune-response-to-mycobacterium-tuberculosis
#18
Alissa C Rothchild, James R Sissons, Shahin Shafiani, Christopher Plaisier, Deborah Min, Dat Mai, Mark Gilchrist, Jacques Peschon, Ryan P Larson, Andreas Bergthaler, Nitin S Baliga, Kevin B Urdahl, Alan Aderem
The regulation of host-pathogen interactions during Mycobacterium tuberculosis (Mtb) infection remains unresolved. MicroRNAs (miRNAs) are important regulators of the immune system, and so we used a systems biology approach to construct an miRNA regulatory network activated in macrophages during Mtb infection. Our network comprises 77 putative miRNAs that are associated with temporal gene expression signatures in macrophages early after Mtb infection. In this study, we demonstrate a dual role for one of these regulators, miR-155...
October 11, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27664344/leapfrogging-into-new-territory-how-mascarene-ridged-frogs-diversified-across-africa-and-madagascar-to-maintain-their-ecological-niche
#19
Breda M Zimkus, Lucinda P Lawson, Michael Barej, Christopher D Barratt, Alan Channing, Katrina M Dash, J Maximilian Dehling, Louis Du Preez, Philip-Sebastian Gehring, Eli Greenbaum, Václav Gvoždík, James Harvey, Jos Kielgast, Chifundera Kusamba, Zoltán T Nagy, Maciej Pabijan, Johannes Penner, Mark-Oliver Rödel, Miguel Vences, Stefan Lötters
The Mascarene ridged frog, Ptychadena mascareniensis, is a species complex that includes numerous lineages occurring mostly in humid savannas and open forests of mainland Africa, Madagascar, the Seychelles, and the Mascarene Islands. Sampling across this broad distribution presents an opportunity to examine the genetic differentiation within this complex and to investigate how the evolution of bioclimatic niches may have shaped current biogeographic patterns. Using model-based phylogenetic methods and molecular-clock dating, we constructed a time-calibrated molecular phylogenetic hypothesis for the group based on mitochondrial 16S rRNA and cytochrome b (cytb) genes and the nuclear RAG1 gene from 173 individuals...
September 21, 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27652162/a-dynamic-novel-approach-for-bid-no-bid-decision-making
#20
Huawang Shi, Hang Yin, Lianyu Wei
The process of bid/no-bid decision-making is su bjected to uncertainty and influence of complex criteria. This paper proposed an application of the integration of rough sets (RS) and improved general regression neural network (GRNN) based on niche particle swarm optimization (NPSO) algorithm for tendering decision making. The decision table of RS and the attribution reduction was processed by MIBARK algorithm to simply the samples of GRNN. In order to improve the general regression neural network (GRNN) network performance, the niche particle swarm optimization (NPSO) was used to optimize the spread parameter σ of GRNN neural network, then a novel Bid/no-bid decision model was established based on RS and NPSO-GRNN neural network algorithm...
2016: SpringerPlus
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