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https://www.readbyqxmd.com/read/28108650/aerobic-efficiency-is-associated-with-the-improvement-in-maximal-power-output-during-acute-hyperoxia
#1
Tom A Manselin, Olof Södergård, Filip J Larsen, Peter Lindholm
This study investigated the relationship between aerobic efficiency during cycling exercise and the increase in physical performance with acute hyperoxic exposure (FiO2 ~31%) (HOX) and also tested the hypothesis that fat oxidation could be increased by acute hyperoxia. Fourteen males and four females were recruited for two sessions, where they exercised for 2 × 10 min at 100 W to determine efficiency. HOX and normoxia (NOX) were administered randomly on both occasions to account for differences in nitrogen exchange...
January 2017: Physiological Reports
https://www.readbyqxmd.com/read/28104672/modulating-the-malignancy-of-hox-proteins
#2
Michael Kyba
No abstract text is available yet for this article.
January 19, 2017: Blood
https://www.readbyqxmd.com/read/28103242/genome-wide-binding-of-posterior-hoxa-d-transcription-factors-reveals-subgrouping-and-association-with-ctcf
#3
Ivana Jerković, Daniel M Ibrahim, Guillaume Andrey, Stefan Haas, Peter Hansen, Catrin Janetzki, Irene González Navarrete, Peter N Robinson, Jochen Hecht, Stefan Mundlos
Homeotic genes code for key transcription factors (HOX-TFs) that pattern the animal body plan. During embryonic development, Hox genes are expressed in overlapping patterns and function in a partially redundant manner. In vitro biochemical screens probing the HOX-TF sequence specificity revealed largely overlapping sequence preferences, indicating that co-factors might modulate the biological function of HOX-TFs. However, due to their overlapping expression pattern, high protein homology, and insufficiently specific antibodies, little is known about their genome-wide binding preferences...
January 19, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28101674/posterior-tail-development-in-the-salamander-eurycea-cirrigera-exploring-cellular-dynamics-across-life-stages
#4
Janet L Vaglia, Chet Fornari, Paula K Evans
During embryogenesis, the body axis elongates and specializes. In vertebrate groups such as salamanders and lizards, elongation of the posterior body axis (tail) continues throughout life. This phenomenon of post-embryonic tail elongation via addition of vertebrae has remained largely unexplored, and little is known about the underlying developmental mechanisms that promote vertebral addition. Our research investigated tail elongation across life stages in a non-model salamander species, Eurycea cirrigera (Plethodontidae)...
January 18, 2017: Development Genes and Evolution
https://www.readbyqxmd.com/read/28093668/molecular-characterization-of-hoxc8-gene-and-methylation-status-analysis-of-its-exon-1-associated-with-the-length-of-cashmere-fiber-in-liaoning-cashmere-goat
#5
Wen L Bai, Jiao J Wang, Rong H Yin, Yun L Dang, Ze Y Wang, Yu B Zhu, Yu Y Cong, Liang Deng, Dan Guo, Shi Q Wang, Shu H Yang, Hui L Xue
Homeobox protein Hox-C8 (HOXC8) is a member of Hox family. It is expressed in the dermal papilla of the skin and is thought to be associated with the hair inductive capacity of dermal papilla cells. In the present study, we isolated and characterized a full-length open reading frame of HOXC8 cDNA from the skin tissue of Liaoning cashmere goat, as well as, established a phylogenetic relationship of goat HOXC8 with that of other species. Also, we investigated the effect of methylation status of HOXC8 exon 1 at anagen secondary hair follicle on the cashmere fiber traits in Liaoning cashmere goat...
January 16, 2017: Genetica
https://www.readbyqxmd.com/read/28092121/hox-functional-diversity-novel-insights-from-flexible-motif-folding-and-plastic-protein-interaction
#6
Miguel Ortiz-Lombardia, Nicolas Foos, Corinne Maurel-Zaffran, Andrew J Saurin, Yacine Graba
How the formidable diversity of forms emerges from developmental and evolutionary processes is one of the most fascinating questions in biology. The homeodomain-containing Hox proteins were recognized early on as major actors in diversifying animal body plans. The molecular mechanisms underlying how this transcription factor family controls a large array of context- and cell-specific biological functions is, however, still poorly understood. Clues to functional diversity have emerged from studies exploring how Hox protein activity is controlled through interactions with PBC class proteins, also evolutionary conserved HD-containing proteins...
January 16, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28087711/ctcf-mediated-topological-boundaries-during-development-foster-appropriate-gene-regulation
#7
Varun Narendra, Milica Bulajić, Job Dekker, Esteban O Mazzoni, Danny Reinberg
The genome is organized into repeating topologically associated domains (TADs), each of which is spatially isolated from its neighbor by poorly understood boundary elements thought to be conserved across cell types. Here, we show that deletion of CTCF (CCCTC-binding factor)-binding sites at TAD and sub-TAD topological boundaries that form within the HoxA and HoxC clusters during differentiation not only disturbs local chromatin domain organization and regulatory interactions but also results in homeotic transformations typical of Hox gene misregulation...
December 15, 2016: Genes & Development
https://www.readbyqxmd.com/read/28070051/-prognostic-value-of-lncrna-hotair-expression-in-%C3%A2-patients-with-cancer-a-meta-analysis
#8
Wenna Xi, Wei Song
To systematically review the prognostic value regarding the expression of long non-coding RNA (lncRNA) Hox transcript antisense intergenic RNA (HOTAIR) in patients with cancer. 
 Methods: Databases including The Cochrane Library, EMBASE, MEDLINE, and PubMed were searched to collect English literature on the correlation between lncRNA HOTAIR expression and overall survival in tumors. The retrieval time was from inception to September 2015. After data were extracted, a Meta-analysis was performed using RevMan 5...
December 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28068897/neotenic-phenomenon-in-gene-expression-in-the-skin-of-foxn1-deficient-nude-mice-a-projection-for-regenerative-skin-wound-healing
#9
Anna Kur-Piotrowska, Marta Kopcewicz, Leslie P Kozak, Pawel Sachadyn, Anna Grabowska, Barbara Gawronska-Kozak
BACKGROUND: Mouse fetuses up to 16 day of embryonic development and nude (Foxn1- deficient) mice are examples of animals that undergo regenerative (scar-free) skin healing. The expression of transcription factor Foxn1 in the epidermis of mouse fetuses begins at embryonic day 16.5 which coincides with the transition point from scar-free to scar-forming skin wound healing. In the present study, we tested the hypothesis that Foxn1 expression in the skin is an essential condition to establish the adult skin phenotype and that Foxn1 inactivity in nude mice keeps skin in the immature stage resembling the phenomena of neoteny...
January 9, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28067520/reactive-uptake-of-gaseous-sesquiterpenes-on-aqueous-surfaces
#10
Kohei Matsuoka, Yosuke Sakamoto, Tetsuya Hama, Yoshizumi Kajii, Shinichi Enami
Sesquiterpenes emitted from biogenic sources play important roles in atmospheric HOx cycles and new particle formation. Current atmospheric models, however, fail to account for their fates, possibly due to missing heterogeneous sinks. Here we apply interface-specific mass spectrometry to detect carbocation products of the reactive uptake of gaseous sesquiterpenes C15H24 (beta-caryophyllene (b-C), alpha-humulene (a-H), and alloaromadendrene (a-d)) on the surface of aqueous microjets as functions of water acidity and gas concentration...
January 9, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28067428/hotair-role-in-melanoma-progression-and-its-identification-in-the-blood-of-patients-with-advanced-disease
#11
Monica Cantile, Giosuè Scognamiglio, Laura Marra, Gabriella Aquino, Chiara Botti, Maria Rosaria Falcone, Maria Gabriella Malzone, Giuseppina Liguori, Maurizio Di Bonito, Renato Franco, Paolo Antonio Ascierto, Gerardo Botti
OBJECTIVES: The molecular mechanisms responsible for the metastatic progression of melanoma have not been fully defined yet. We have recently shown that an important role in this process is certainly played by HOX genes, whose regulation is under control of particular non-coding RNAs, some of which are present within the HOX locus. HOTAIR is the most studied among them, whose aberrant expression is associated with the metastatic progression of many malignancies. The aim of this study was to verify the role played by HOTAIR in metastatic progression of melanoma and to evaluate the circulating levels of HOTAIR in the blood of patients with metastatic melanoma...
January 9, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28065741/essential-roles-for-cdx-in-murine-primitive-hematopoiesis
#12
Travis Brooke-Bisschop, Joanne G A Savory, Tanya Foley, Randy Ringuette, David Lohnes
The Cdx transcription factors play essential roles in primitive hematopoiesis in the zebrafish where they exert their effects, in part, through regulation of hox genes. Defects in hematopoiesis have also been reported in Cdx mutant murine embryonic stem cell models, however, to date no mouse model reflecting the zebrafish Cdx mutant hematopoietic phenotype has been described. This is likely due, in part, to functional redundancy among Cdx members and the early lethality of Cdx2 null mutants. To circumvent these limitations, we used Cre-mediated conditional deletion to assess the impact of concomitant loss of Cdx1 and Cdx2 on murine primitive hematopoiesis...
January 5, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28058796/hox-gene-expression-in-the-specialized-limbs-of-the-iberian-mole-talpa-occidentalis
#13
Constanze Bickelmann, Wessel van der Vos, Merijn A G de Bakker, Rafael Jiménez, Saskia Maas, Marcelo R Sánchez-Villagra
Fossorial talpid moles use their limbs predominantly for digging, which explains their highly specialized anatomy. The humerus is particularly short and dorsoventrally rotated, with broadened distal and proximal parts where muscles attach and which facilitate powerful abductive movements. The radius and ulna are exceptionally robust and short. The ulna has an expanded olecranon process. The femur is generalized, but the fused tibia-fibula complex is short and robust. To understand the developmental bases of these specializations, we studied expression patterns of four 5' Hox genes in the fossorial Iberian mole (Talpa occidentalis)...
January 2017: Evolution & Development
https://www.readbyqxmd.com/read/28055976/cd133-in-brain-tumor-the-prognostic-factor
#14
Bin Li, Cian M McCrudden, Hiu Fung Yuen, Xinping Xi, Peng Lyu, Kwok Wah Chan, Shu Dong Zhang, Hang Fai Kwok
CD133 has been shown to be an important stem cell factor that promotes glioma progression. However, the mechanism for CD133-mediated glioma progression has yet to be fully elucidated. In this study, we found that CD133 mRNA expression was a prognostic marker in three independent glioma patient cohorts, corroborating a putative role for CD133 in glioma progression. Importantly, we found that CD133 expression in glioma was highly correlated with the expression of HOX gene stem cell factors (HOXA5, HOXA7, HOXA10, HOXC4 and HOXC6)...
December 31, 2016: Oncotarget
https://www.readbyqxmd.com/read/28052248/hox2-genes-are-required-for-tonotopic-map-precision-and-sound-discrimination-in-the-mouse-auditory-brainstem
#15
Kajari Karmakar, Yuichi Narita, Jonathan Fadok, Sebastien Ducret, Alberto Loche, Taro Kitazawa, Christel Genoud, Thomas Di Meglio, Raphael Thierry, Joao Bacelo, Andreas Lüthi, Filippo M Rijli
Tonotopy is a hallmark of auditory pathways and provides the basis for sound discrimination. Little is known about the involvement of transcription factors in brainstem cochlear neurons orchestrating the tonotopic precision of pre-synaptic input. We found that in the absence of Hoxa2 and Hoxb2 function in Atoh1-derived glutamatergic bushy cells of the anterior ventral cochlear nucleus, broad input topography and sound transmission were largely preserved. However, fine-scale synaptic refinement and sharpening of isofrequency bands of cochlear neuron activation upon pure tone stimulation were impaired in Hox2 mutants, resulting in defective sound-frequency discrimination in behavioral tests...
January 3, 2017: Cell Reports
https://www.readbyqxmd.com/read/28041967/cdx-is-crucial-for-the-timing-mechanism-driving-colinear-hox-activation-and-defines-a-trunk-segment-in-the-hox-cluster-topology
#16
Roel Neijts, Shilu Amin, Carina van Rooijen, Jacqueline Deschamps
Cdx and Hox transcription factors are important regulators of axial patterning and are required for tissue generation along the vertebrate body axis. Cdx genes have been demonstrated to act upstream of Hox genes in midgestation embryos. Here, we investigate the role of Cdx transcription factors in the gradual colinear activation of the Hox clusters. We found that Hox temporally colinear expression is severely affected in epiblast stem cells derived from Cdx null embryos. We demonstrate that after initiation of 3' Hox gene transcription, Cdx activity is crucial for H3K27ac deposition and for accessibility of cis-regulatory elements around the central - or 'trunk' - Hox genes...
December 29, 2016: Developmental Biology
https://www.readbyqxmd.com/read/28026082/hox-genes-in-the-adult-skeleton-novel-functions-beyond-embryonic-development
#17
REVIEW
Danielle R Rux, Deneen M Wellik
Hox genes encode evolutionarily conserved transcription factors that control skeletal patterning in the developing embryo. They are expressed in regionally restricted domains and function to regulate the morphology of specific vertebral and long bone elements. Recent work has provided evidence that Hox genes continue to be regionally expressed in adult tissues. Fibroblasts cultured from adult tissues show broadly maintained Hox gene expression patterns. In the adult skeleton, Hox genes are expressed in progenitor-enriched populations of mesenchymal stem/stromal cells (MSCs), and genetic loss-of-function analyses have provided evidence that Hox genes function during the fracture healing process...
December 27, 2016: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28009287/cdx-and-t-brachyury-co-activate-growth-signaling-in-the-embryonic-axial-progenitor-niche
#18
Shilu Amin, Roel Neijts, Salvatore Simmini, Carina van Rooijen, Sander C Tan, Lennart Kester, Alexander van Oudenaarden, Menno P Creyghton, Jacqueline Deschamps
In vertebrate embryos, anterior tissues are generated early, followed by the other axial structures that emerge sequentially from a posterior growth zone. The genetic network driving posterior axial elongation in mice, and its disturbance in mutants with posterior truncation, is not yet fully understood. Here, we show that the combined expression of Cdx2 and T Brachyury is essential to establish the core signature of posterior axial progenitors. Cdx2 and T Brachyury are required for extension of a similar trunk portion of the axis...
December 20, 2016: Cell Reports
https://www.readbyqxmd.com/read/28007975/ctdgfinder-a-novel-homology-based-algorithm-for-identifying-closely-spaced-clusters-of-tandemly-duplicated-genes
#19
Juan F Ortiz, Antonis Rokas
Closely spaced clusters of tandemly duplicated genes (CTDGs) contribute to the diversity of many phenotypes, including chemosensation, snake venom, and animal body plans. CTDGs have traditionally been identified subjectively as genomic neighborhoods containing several gene duplicates in close proximity; however, CTDGs are often highly variable with respect to gene number, intergenic distance, and synteny. This lack of formal definition hampers the study of CTDG evolutionary dynamics and the discovery of novel CTDGs in the exponentially growing body of genomic data...
October 20, 2016: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/27997818/hox-service-warranty-extends-to-adult-bone-repair
#20
Andrew J Saurin, Marie-Claire Delfini, Yacine Graba
Hox genes are key developmental regulators. In this issue of Developmental Cell, Rux et al. (2016) uncover an adult role for Hox11 genes in regionalized bone repair. This function relies on Hox activity in bone marrow multipotent mesenchymal stem progenitor cells, which promotes skeletal cell differentiation.
December 19, 2016: Developmental Cell
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