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https://www.readbyqxmd.com/read/28446619/candidate-genes-mediating-magnetoreception-in-rainbow-trout-oncorhynchus-mykiss
#1
Robert R Fitak, Benjamin R Wheeler, David A Ernst, Kenneth J Lohmann, Sönke Johnsen
Diverse animals use Earth's magnetic field in orientation and navigation, but little is known about the molecular mechanisms that underlie magnetoreception. Recent studies have focused on two possibilities: (i) magnetite-based receptors; and (ii) biochemical reactions involving radical pairs. We used RNA sequencing to examine gene expression in the brain of rainbow trout (Oncorhynchus mykiss) after exposure to a magnetic pulse known to disrupt magnetic orientation behaviour. We identified 181 differentially expressed genes, including increased expression of six copies of the frim gene, which encodes a subunit of the universal iron-binding and trafficking protein ferritin...
April 2017: Biology Letters
https://www.readbyqxmd.com/read/28434161/can-valproic-acid-regulate-neurogenesis-from-nestin-cells-in-the-adult-midbrain
#2
Parisa Farzanehfar, Malcolm K Horne, Tim D Aumann
Degeneration of dopamine (DA) neurons in the substantia nigra pars compacta (SNc) causes the motor symptoms (e.g. tremor, muscle rigidity, bradykinesia, postural instability) of Parkinson's disease (PD). It is generally agreed that replacing these neurons will provide better motor symptom relief and fewer side effects than current pharmacotherapies. One potential approach to this is up-regulating endogenous DA neurogenesis in SNc. In the present study, we conducted bioinformatics analyses to identify signalling pathways that control expression of Pax6 and Msx1 genes, which have been identified as potentially important neurogenic regulators in the adult midbrain...
April 22, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28398607/wagr-syndrome-and-congenital-hypothyroidism-in-a-child-with-a-mosaic-11p13-deletion
#3
Minh Tuan Huynh, Elise Boudry-Labis, Bénédicte Duban, Joris Andrieux, Cong Toai Tran, Heidi Tampere, Delphine Ceraso, Sylvie Manouvrier, Gérard Tachdjian, Catherine Roche-Lestienne, Catherine Vincent-Delorme
Wilm's tumor, aniridia, genitourinary anomalies, and mental retardation (WAGR) syndrome, a rare genetic disorder, is caused by the loss of 11p13 region including PAX6 and WT1. We report novel findings in a 28-month-old boy with aniridia, Wilm's tumor, congenital hypothyroidism, and sublingual thyroid ectopia. He was found to have a mosaic 5.28 Mb interstitial deletion of chromosome 11p13 deleting PAX6 and WT1. In order to clarify the mechanism underlying his thyroid dysgenesis, sequence analysis of candidate thyroid developmental genes was performed...
April 11, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28397836/efhd2-swiprosin-1-is-a-common-genetic-determinator-for-sensation-seeking-low-anxiety-and-alcohol-addiction
#4
D Mielenz, M Reichel, T Jia, E B Quinlan, T Stöckl, M Mettang, D Zilske, E Kirmizi-Alsan, P Schönberger, M Praetner, S E Huber, D Amato, M Schwarz, P Purohit, S Brachs, J Spranger, A Hess, C Büttner, A B Ekici, F Perez-Branguli, B Winner, V Rauschenberger, T Banaschewski, A L W Bokde, C Büchel, P J Conrod, S Desrivières, H Flor, V Frouin, J Gallinat, H Garavan, P Gowland, A Heinz, J-L Martinot, H Lemaitre, F Nees, T Paus, M N Smolka, A Schambony, T Bäuerle, V Eulenburg, C Alzheimer, A Lourdusamy, G Schumann, C P Müller
In many societies, the majority of adults regularly consume alcohol. However, only a small proportion develops alcohol addiction. Individuals at risk often show a high sensation-seeking/low-anxiety behavioural phenotype. Here we asked which role EF hand domain containing 2 (EFhd2; Swiprosin-1) plays in the control of alcohol addiction-associated behaviours. EFhd2 knockout (KO) mice drink more alcohol than controls and spontaneously escalate their consumption. This coincided with a sensation-seeking and low-anxiety phenotype...
April 11, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28382310/reply-to-is-a-microrna-328-binding-site-in-pax6-associated-with-rolandic-epilepsy
#5
Lisa J Strug, Deb K Pal
No abstract text is available yet for this article.
April 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28382309/is-a-microrna-328-binding-site-in-pax6-associated-with-rolandic-epilepsy
#6
Amelia McGlade, Kenneth A Myers, Samuel F Berkovic, Ingrid E Scheffer, Slavé Petrovski, Michael S Hildebrand
No abstract text is available yet for this article.
April 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28377501/the-transcription-factor-pax6-is-required-for-pancreatic-%C3%AE-cell-identity-glucose-regulated-atp-synthesis-and-ca2-dynamics-in-adult-mice
#7
Ryan K Mitchell, Marie-Sophie Nguyen-Tu, Pauline Chabosseau, Rebecca M Callingham, Timothy J Pullen, Rebecca Cheung, Isabelle Leclerc, David J Hodson, Guy A Rutter
Heterozygous mutations in the human paired box gene PAX6 lead to impaired glucose tolerance. Although embryonic deletion of the Pax6 gene in mice leads to the loss of most pancreatic islet cell types, the functional consequences of Pax6 loss in adults are poorly defined. Here, we developed a mouse line in which Pax6 was selectively inactivated in β cells by crossing animals with floxed Pax6 alleles to mice expressing the inducible Pdx1CreERT transgene. Pax6 deficiency, achieved by tamoxifen injection, caused progressive hyperglycemia...
April 4, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28363755/an-investigation-of-gene-expression-in-single-cells-derived-from-nestin-expressing-cells-in-the-adult-mouse-midbrain-in-vivo
#8
Parisa Farzanehfar, Malcolm K Horne, Tim D Aumann
Generation of new dopamine (DA) neurons in the adult midbrain is a controversial issue in development of better treatments for Parkinson's disease (PD). Previous research suggests Nestin-expressing neural precursor cells (NPCs) have a propensity to differentiate into neurons here, including DA neurons. In the present study we sought confirmation of this by studying gene expression in single Nestin-expressing cells and their progeny/ontogeny within the adult mouse midbrain. Cells were identified by administering a pulse of Tamoxifen to adult Nestin-CreER(T2)×R26eYFP transgenic mice...
March 29, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28355573/single-cell-rna-seq-reveals-hypothalamic-cell-diversity
#9
Renchao Chen, Xiaoji Wu, Lan Jiang, Yi Zhang
The hypothalamus is one of the most complex brain structures involved in homeostatic regulation. Defining cell composition and identifying cell-type-specific transcriptional features of the hypothalamus is essential for understanding its functions and related disorders. Here, we report single-cell RNA sequencing results of adult mouse hypothalamus, which defines 11 non-neuronal and 34 neuronal cell clusters with distinct transcriptional signatures. Analyses of cell-type-specific transcriptomes reveal gene expression dynamics underlying oligodendrocyte differentiation and tanycyte subtypes...
March 28, 2017: Cell Reports
https://www.readbyqxmd.com/read/28344003/abnormal-neural-progenitor-cells-differentiated-from-induced-pluripotent-stem-cells-partially-mimicked-development-of-tsc2-neurological-abnormalities
#10
Yaqin Li, Jiqing Cao, Menglong Chen, Jing Li, Yiming Sun, Yu Zhang, Yuling Zhu, Liang Wang, Cheng Zhang
Tuberous sclerosis complex (TSC) is a disease featuring devastating and therapeutically challenging neurological abnormalities. However, there is a lack of specific neural progenitor cell models for TSC. Here, the pathology of TSC was studied using primitive neural stem cells (pNSCs) from a patient presenting a c.1444-2A>C mutation in TSC2. We found that TSC2 pNSCs had higher proliferative activity and increased PAX6 expression compared with those of control pNSCs. Neurons differentiated from TSC2 pNSCs showed enlargement of the soma, perturbed neurite outgrowth, and abnormal connections among cells...
April 11, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28337288/which-has-more-stem-cell-characteristics-m%C3%A3-ller-cells-or-m%C3%A3-ller-cells-derived-from-in-vivo-culture-in-neurospheres
#11
Hong-Pei Ji, Yu Xiong, En-Dong Zhang, Wei-Tao Song, Zhao-Lin Gao, Fei Yao, Hong Sun, Rong-Rong Zhou, Xiao-Bo Xia
OBJECTIVE: Müller cells can be acquired from in vitro culture or a neurosphere culture system. Both culture methods yield cells with progenitor-cell characteristics that can differentiate into mature nervous cells. We compared the progenitor-cell traits of Müller cells acquired from each method. METHODS: Primary murine Müller cells were isolated in serum culture media and used to generate Müller cells derived from neurospheres in serum-free culture conditions...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28332226/mir-223-pax6-axis-regulates-glioblastoma-stem-cell-proliferation-and-the-chemo-resistance-to-tmz-via-regulating-pi3k-akt-pathway
#12
Bai-Sheng Huang, Qi-Zhi Luo, Yang Han, Dong Huang, Qing-Ping Tang, Li-Xiang Wu
Chemotherapy is a standard strategy for glioma, while chemoresistance remains a major therapeutic challenge in current clinical practice. Our present study was aimed to determine whether inhibition of the miR-223/ paired box 6 (PAX6) pathway could increase the sensitivity of glioma to Temozolomide. An elevated level of miR-223 was observed in glioma tissues. Exogenous miR-223 promoted cell survival when exposed to Temozolomide (TMZ), while miR-223 inhibition could reverse this process. The RNA and protein levels of PAX6 were significantly decreased by exogenous miR-223, and the 3'-untranslated region of PAX6 was shown to be a target of miR-223...
March 23, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28321846/molecular-analysis-of-patients-with-aniridia-in-russian-federation-broadens-the-spectrum-of-pax6-mutations
#13
Tatyana A Vasilyeva, Anna A Voskresenskaya, Barbara Käsmann-Kellner, Olga V Khlebnikova, Nadezhda A Pozdeyeva, Gulnara M Bayazutdinova, Sergey I Kutsev, Evgeny K Ginter, Elena V Semina, Andrey V Marakhonov, Rena A Zinchenko
Congenital aniridia is a severe autosomal dominant congenital panocular disorder, mainly associated with pathogenic variants in the PAX6 gene. The objective of the study was to investigate the mutational and clinical spectra of congenital aniridia in a cohort of 117 patients from Russia. Each patient underwent detailed ophthalmological examination. From 91 unrelated families, 110 patients were diagnosed with congenital aniridia and 7 with WAGR syndrome. The clinical presentation in aniridia patients varied from the complete bilateral absence of the iris (75...
March 21, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28302062/ancestral-and-novel-roles-of-pax-family-genes-in-mollusks
#14
Maik Scherholz, Emanuel Redl, Tim Wollesen, André Luiz de Oliveira, Christiane Todt, Andreas Wanninger
BACKGROUND: Pax genes are transcription factors with significant roles in cell fate specification and tissue differentiation during animal ontogeny. Most information on their tempo-spatial mode of expression is available from well-studied model organisms where the Pax-subfamilies Pax2/5/8, Pax6, and Paxα/β are mainly involved in the development of the central nervous system (CNS), the eyes, and other sensory organs. In certain taxa, Pax2/5/8 seems to be additionally involved in the development of excretion organs...
March 16, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28300742/newly-identified-paired-box-6-mutation-of-variant-familial-aniridia-congenital-iris-ectropion-with-foveal-hypoplasia
#15
Woo Jin Kim, Jong Ha Kim, Nam Chun Cho
Congenital aniridia is a kind of eye disease characterized by complete or partial hypoplasia of the iris and is associated with other ocular anomalies including corneal opacity, glaucoma, and foveal hypoplasia. Heterozygous mutation of paired box 6 (PAX6) gene was identified in most cases of aniridia, with iatrogenic mutations accounting for about two-third of the cases and chromosomal rearrangements accounting for the other one-third. We report rare cases of variant aniridia, congenital iris ectropion associated with foveal hypoplasia in both a woman and her son with a mutation of PAX6 gene...
January 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28285945/hanging-drop-culture-enhances-differentiation-of-human-adipose-derived-stem-cells-into-anterior-neuroectodermal-cells-using-small-molecules
#16
Noushin Amirpour, Shahnaz Razavi, Ebrahim Esfandiari, Batoul Hashemibeni, Mohammad Kazemi, Hossein Salehi
Inspired by in vivo developmental process, several studies were conducted to design a protocol for differentiating of mesenchymal stem cells into neural cells in vitro. Human adipose-derived stem cells (hADSCs) as mesenchymal stem cells are a promising source for this purpose. At current study, we applied a defined neural induction medium by using small molecules for direct differentiation of hADSCs into anterior neuroectodermal cells. Anterior neuroectodermal differentiation of hADSCs was performed by hanging drop and monolayer protocols...
March 7, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28279665/multiple-sevoflurane-anesthesia-in-pregnant-mice-inhibits-neurogenesis-of-fetal-hippocampus-via-repressing-transcription-factor-pax6
#17
Fang Fang, Ruixue Song, Xiaomin Ling, Mengyuan Peng, Zhanggang Xue, Jing Cang
Sevoflurane is widely used in non-obstetric surgeries of pregnant women, but its influences on fetal brain are still not fully known. We set out to assess the effects of multiple maternal sevoflurane exposure on neurogenesis and cognitive dysfunction in fetus and offspring. Pregnant mice (gestational day 15.5) and cultured mouse neural stem cells (NSCs) received daily sevoflurane exposure (2.5%×2h and 4.1%×2h respectively) for three consecutive days. Cognitive function of the offspring was determined with the Morris water maze...
April 15, 2017: Life Sciences
https://www.readbyqxmd.com/read/28271248/network-reconstruction-reveals-that-valproic-acid-activates-neurogenic-transcriptional-programs-in-adult-brain-following-traumatic-injury
#18
Gerald A Higgins, Patrick Georgoff, Vahagn Nikolian, Ari Allyn-Feuer, Brian Pauls, Richard Higgins, Brian D Athey, Hasan E Alam
OBJECTIVES: To determine the mechanism of action of valproic acid (VPA) in the adult central nervous system (CNS) following traumatic brain injury (TBI) and hemorrhagic shock (HS). METHODS: Data were analyzed from different sources, including experiments in a porcine model, data from postmortem human brain, published studies, public and commercial databases. RESULTS: The transcriptional program in the CNS following TBI, HS, and VPA treatment includes activation of regulatory pathways that enhance neurogenesis and suppress gliogenesis...
March 7, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28270834/metabolic-stress-and-compromised-identity-of-pancreatic-beta-cells
#19
REVIEW
Avital Swisa, Benjamin Glaser, Yuval Dor
Beta cell failure is a central feature of type 2 diabetes (T2D), but the molecular underpinnings of the process remain only partly understood. It has been suggested that beta cell failure in T2D involves massive cell death. Other studies ascribe beta cell failure to cell exhaustion, due to chronic oxidative or endoplasmic reticulum stress leading to cellular dysfunction. More recently it was proposed that beta cells in T2D may lose their differentiated identity, possibly even gaining features of other islet cell types...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28253300/the-pax-gene-family-highlights-from-cephalopods
#20
Sandra Navet, Auxane Buresi, Sébastien Baratte, Aude Andouche, Laure Bonnaud-Ponticelli, Yann Bassaglia
Pax genes play important roles in Metazoan development. Their evolution has been extensively studied but Lophotrochozoa are usually omitted. We addressed the question of Pax paralog diversity in Lophotrochozoa by a thorough review of available databases. The existence of six Pax families (Pax1/9, Pax2/5/8, Pax3/7, Pax4/6, Paxβ, PoxNeuro) was confirmed and the lophotrochozoan Paxβ subfamily was further characterized. Contrary to the pattern reported in chordates, the Pax2/5/8 family is devoid of homeodomain in Lophotrochozoa...
2017: PloS One
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