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https://www.readbyqxmd.com/read/28813004/lactose-binding-induces-opposing-dynamics-changes-in-human-galectins-revealed-by-nmr-based-hydrogen-deuterium-exchange
#1
Chih-Ta Henry Chien, Meng-Ru Ho, Chung-Hung Lin, Shang-Te Danny Hsu
Galectins are β-galactoside-binding proteins implicated in a myriad of biological functions. Despite their highly conserved carbohydrate binding motifs with essentially identical structures, their affinities for lactose, a common galectin inhibitor, vary significantly. Here, we aimed to examine the molecular basis of differential lactose affinities amongst galectins using solution-based techniques. Consistent dissociation constants of lactose binding were derived from nuclear magnetic resonance (NMR) spectroscopy, intrinsic tryptophan fluorescence, isothermal titration calorimetry and bio-layer interferometry for human galectin-1 (hGal1), galectin-7 (hGal7), and the N-terminal and C-terminal domains of galectin-8 (hGal8(NTD) and hGal8(CTD), respectively)...
August 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28805617/molecular-cytogenetic-characterization-of-a-duplication-of-15q24-2-q26-2-associated-with-anencephaly-and-neural-tube-defect
#2
Chih-Ping Chen, Chen-Yu Chen, Schu-Rern Chern, Peih-Shan Wu, Shin-Wen Chen, Shih-Ting Lai, Chen-Chi Lee, Chien-Wen Yang, Wayseen Wang
OBJECTIVE: We present molecular cytogenetic characterization of a duplication of 15q24.2-q26.2 associated with anencephaly and neural tube defect (NTD). CASE REPORT: A 35-year-old pregnant woman was found to have a fetus with anencephaly by prenatal ultrasound at 12 weeks of gestation. The pregnancy was subsequently terminated, and a malformed fetus was delivered with anencephaly. Cytogenetic analysis of the cultured placental tissues revealed a karyotype of 46,XX,dup(15) (q24...
August 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28801997/prevalence-of-low-bone-mass-among-adolescents-with-nontransfusion-dependent-hemoglobin-e-%C3%AE-thalassemia-and-its-relationship-with-anemia-severity
#3
Pairunyar Nakavachara, Jaturat Petchkul, Krittha Jeerawongpanich, Pornpimol Kiattisakthavee, Teerarat Manpayak, Parichat Netsakulnee, Katharee Chaichanwattanakul, Julaporn Pooliam, Somdet Srichairatanakool, Vip Viprakasit
BACKGROUND: Low bone mass is common among adolescents with transfusion-dependent β-thalassemia despite adequate transfusion and iron chelation. However, there are few reports regarding bone mineral density (BMD) among adolescents with nontransfusion-dependent thalassemia (NTDT). Indeed, only BMD data in patients with nontransfusion-dependent (NTD) β-thalassemia intermedia have been reported. No previous study has investigated BMD among adolescents with NTD hemoglobin (Hb) E/β-thalassemia...
August 12, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28797243/polymorphism-and-structure-of-style-specific-arabinogalactan-proteins-as-determinants-of-pollen-tube-growth-in-nicotiana
#4
Andrzej K Noyszewski, Yi-Cheng Liu, Koichiro Tamura, Alan G Smith
BACKGROUND: Pollen tube growth and fertilization are key processes in angiosperm sexual reproduction. The transmitting tract (TT) of Nicotiana tabacum controls pollen tube growth in part by secreting pistil extensin-like protein III (PELPIII), transmitting-tract-specific (TTS) protein and 120 kDa glycoprotein (120 K) into the stylar extracellular matrix. The three arabinogalactan proteins (AGP) are referred to as stylar AGPs and are the focus of this research. The transmitting tract regulates pollen tube growth, promoting fertilization or rejecting pollen tubes...
August 10, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28793309/the-microbiome-in-urogenital-schistosomiasis-and-induced-bladder-pathologies
#5
Adewale S Adebayo, Mangesh Survayanshi, Shrikanth Bhute, Atinuke M Agunloye, Raphael D Isokpehi, Chiaka I Anumudu, Yogesh S Shouche
BACKGROUND: Human schistosomiasis is a highly prevalent neglected tropical disease (NTD) caused by Schistosoma species. Research on the molecular mechanisms influencing the outcomes of bladder infection by Schistosoma haematobium is urgently needed to develop new diagnostics, therapeutics and infection prevention strategies. The objective of the research study was to determine the microbiome features and changes in urine during urogenital schistosomiasis and induced bladder pathologies...
August 9, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28763666/are-concentrations-of-alkaline-earth-elements-in-maternal-hair-associated-with-risk-of-neural-tube-defects
#6
Zhenjiang Li, Bin Wang, Wenhua Huo, Yingying Liu, Yibing Zhu, Jing Xie, Zhiwen Li, Aiguo Ren
The relationship between maternal intake of alkaline earth elements (AEEs) during the period of neural tube closure and the risk of neural tube defects (NTDs) is still unclear. We propose that AEE deficiency during the early period of pregnancy is associated with an elevated risk of NTDs in the offspring. In this study, we recruited 191 women with NTD-affected pregnancies (cases) and 261 women who delivered healthy infants (controls). The concentrations of four AEEs (Ca, Mg, Sr, Ba) in maternal hair sections that grew during early pregnancy were analyzed...
July 28, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28762673/interaction-between-maternal-and-paternal-shmt1-c1420t-predisposes-to-neural-tube-defects-in-the-fetus-evidence-from-case-control-and-family-based-triad-approaches
#7
Prasoona K Rebekah, Sunitha Tella, Srinadh Buragadda, Muni Kumari Tiruvatturu, Jyothy Akka
BACKGROUND: Neural tube defects (NTDs) are caused by the failure of neural tube formation which occurs during early embryonic development. NTDs are the most severe and leading cause of fetal mortality. Serine hydroxymethyl transferase (SHMT1) provides one-carbon units necessary for embryogenesis and defects in one-carbon production result in specific pathological conditions during pregnancy. The present study is aimed to evaluate the association of SHMT1 C1420T with NTD risk in the fetus using fetal, maternal and paternal groups by applying both case-control and family-based triad approaches...
July 17, 2017: Birth defects research
https://www.readbyqxmd.com/read/28760999/exploiting-conformational-plasticity-in-the-aaa-protein-vcp-p97-to-modify-function
#8
Anne Kathrin Schütz, Enrico Rennella, Lewis E Kay
p97/VCP, a member of the AAA+ (ATPases associated with diverse cellular activities) family of proteins, is implicated in the etiology of a group of degenerative diseases affecting bone and muscle tissue as well as the central nervous system. Methyl-TROSY-based NMR studies have previously revealed how disease-causing mutations deregulate a subtle dynamic conformational equilibrium involving the N-terminal domain (NTD) with implications for the binding of certain adaptors, providing insight into how disease mutations lead to abnormal function...
July 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28751689/in-silico-in-vitro-x-ray-crystallography-and-integrated-strategies-for-discovering-spermidine-synthase-inhibitors-for-chagas-disease
#9
Ryunosuke Yoshino, Nobuaki Yasuo, Yohsuke Hagiwara, Takashi Ishida, Daniel Ken Inaoka, Yasushi Amano, Yukihiro Tateishi, Kazuki Ohno, Ichiji Namatame, Tatsuya Niimi, Masaya Orita, Kiyoshi Kita, Yutaka Akiyama, Masakazu Sekijima
Chagas disease results from infection by Trypanosoma cruzi and is a neglected tropical disease (NTD). Although some treatment drugs are available, their use is associated with severe problems, including adverse effects and limited effectiveness during the chronic disease phase. To develop a novel anti-Chagas drug, we virtually screened 4.8 million small molecules against spermidine synthase (SpdSyn) as the target protein using our super computer "TSUBAME2.5" and conducted in vitro enzyme assays to determine the half-maximal inhibitory concentration values...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747437/crystal-structure-of-the-human-pol%C3%AF%C2%B5-b-subunit-in-complex-with-the-c-terminal-domain-of-the-catalytic-subunit
#10
Andrey G Baranovskiy, Jianyou Gu, Nigar D Babayeva, Igor Kurinov, Youri I Pavlov, Tahir H Tahirov
The eukaryotic B-family DNA polymerases include four members, Polα, Polδ, Polϵ, and Polζ, which share common architectural features, such as the exonuclease/polymerase and C-terminal domains (CTDs) of catalytic subunits bound to indispensable B-subunits, which serve as scaffolds that mediate interactions with other components of the replication machinery. Crystal structures for the B-subunits of Polα and Polδ/Polζ have been reported; the former within the primosome and separately with CTD, and the latter with the N-terminal domain (NTD) of the C-subunit...
July 26, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28742214/association-of-combined-gif290t-c-heterozygous-mutation-fut2-secretor-variant-with-neural-tube-defects
#11
R M Guéant-Rodriguez, C Chery, B-M Fofou-Caillierez, J Voirin, B Foliguet, T Josse, D Tramoy, F François, J-L Guéant
Folate and vitamin B12 are needed for the proper embryo-fetal development possibly through their interacting role in the one-carbon metabolism. Folate fortification reduces the prevalence of complex birth defects, and more specifically neural tube defects (NTD). GIF and FUT2 are two genes associated with the uptake and blood level of vitamin B12. We evaluated GIF and FUT2 as predictors of severe birth defects, in 181 aborted fetuses compared to 375 healthy newborns. The GIF290C allele frequency was estimated to 0...
July 25, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28734603/determination-of-volatile-organic-compounds-in-pen-inks-by-a-dynamic-headspace-needle-trap-device-combined-with-gas-chromatography-mass-spectrometry
#12
Xiaohuan Zang, Weiqian Liang, Qingyun Chang, Tong Wu, Chun Wang, Zhi Wang
Some harmful volatile organic compounds (VOCs), such as methylbenzene, ethylbenzene, xylene, chlorobenzene and bromobenzene, are the commonly found chemicals in pen inks. In this work, a dynamic headspace needle-trap device (D-HS-NTD) with a ZIF-8-derived nanoporous carbon (ZIF-8-NPC) as the adsorbent was developed for the extraction of some VOCs in different pen inks prior to GC-MS detection. The main important influencing experimental parameters including the flow rate of the purge gas N2, extraction temperature, extraction time, desorption temperature and desorption time for the extraction were optimized to obtain a high extraction efficiency...
July 11, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28733604/the-n-terminal-dimerization-is-required-for-tdp-43-splicing-activity
#13
Lei-Lei Jiang, Wei Xue, Jun-Ye Hong, Jun-Ting Zhang, Min-Jun Li, Shao-Ning Yu, Jian-Hua He, Hong-Yu Hu
TDP-43 is a nuclear factor that functions in promoting pre-mRNA splicing. Deletion of the N-terminal domain (NTD) and nuclear localization signal (NLS) (i.e., TDP-35) results in mislocalization to cytoplasm and formation of inclusions. However, how the NTD functions in TDP-43 activity and proteinopathy remains largely unknown. Here, we studied the structure and function of the NTD in inclusion formation and pre-mRNA splicing of TDP-43 by using biochemical and biophysical approaches. We found that TDP-43 NTD forms a homodimer in solution in a concentration-dependent manner, and formation of intermolecular disulfide results in further tetramerization...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28733112/distinctions-in-gene-specific-changes-in-dna-methylation-in-response-to-folic-acid-supplementation-between-women-with-normal-weight-and-obesity
#14
Hea Jin Park, Lynn B Bailey, Deanna C Shade, Dorothy B Hausman, Natalie M Hohos, Richard B Meagher, Gail Pa Kauwell, Richard D Lewis, Alicia K Smith
BACKGROUND/OBJECTIVES: Obesity and maternal folate deficiency are associated with increased risk for neural tube defects (NTDs). Limited knowledge exists on the impact of folate status or obesity on DNA methylation of genes related to NTD risk and folate metabolism. SUBJECTS/METHODS: Women (18-35y) with normal weight (NW; BMI 18.5-24.9kg/m(2); n=12) and obesity (OB; BMI >30kg/m(2); n=6) were provided FA (800μg/d) for 8-weeks. Serum folate concentration and changes in DNA methylation across 2098 CpG sites in 91 genes related to NTD risk and folate metabolism were examined...
July 18, 2017: Obesity Research & Clinical Practice
https://www.readbyqxmd.com/read/28727548/mr-ntd-manifold-regularization-nonnegative-tucker-decomposition-for-tensor-data-dimension-reduction-and-representation
#15
Xutao Li, Michael K Ng, Gao Cong, Yunming Ye, Qingyao Wu
With the advancement of data acquisition techniques, tensor (multidimensional data) objects are increasingly accumulated and generated, for example, multichannel electroencephalographies, multiview images, and videos. In these applications, the tensor objects are usually nonnegative, since the physical signals are recorded. As the dimensionality of tensor objects is often very high, a dimension reduction technique becomes an important research topic of tensor data. From the perspective of geometry, high-dimensional objects often reside in a low-dimensional submanifold of the ambient space...
August 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28723301/maternal-occupation-and-the-risk-of-neural-tube-defects-in-offspring
#16
Jihye Kim, Peter H Langlois, Laura E Mitchell, A J Agopian
We evaluated the association between maternal occupation and the risk of neural tube defects (NTDs) in offspring. Data for 491 nonsyndromic cases were obtained from the Texas Birth Defects Registry for deliveries between 1999 and 2009. We randomly selected 2,291 controls among all live births in Texas during this time. Maternal occupations were classified using automated software and manual assignment. Multivariable logistic regression analyses were used to examine the relationship between maternal occupation and risk for any NTD, adjusting for maternal race/ethnicity, any diabetes, and maternal body mass index...
July 19, 2017: Archives of Environmental & Occupational Health
https://www.readbyqxmd.com/read/28721594/exome-analysis-in-an-estonian-multiplex-family-with-neural-tube-defects-a-case-report
#17
Liina Pappa, Mart Kals, Paula Ann Kivistik, Andres Metspalu, Ann Paal, Tiit Nikopensius
INTRODUCTION: Neural tube defects (NTDs) are a group of common and severe congenital birth defects that occur during early embryonic development due to incomplete closure of the neural tube. The genetic architecture of human NTDs, including spina bifida and hydrocephalus, is highly heterogeneous, with multiple genes/loci and both gene-gene and gene-environment interactions involved. Hence, the variation in outcomes also most likely relates to a combination of the severity of different variants in multiple genes and genetic modifiers affecting the biochemical traits...
July 18, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28718066/the-preventive-effects-of-taurine-on-neural-tube-defects-through-the-wnt-pcp-jnk-dependent-pathway
#18
Qinghua Zhang, Yang Liu, Hui Wang, Li Ma, Hechun Xia, Jianguo Niu, Tao Sun, Li Zhang
The aim of this study was to clarify the protective role of taurine in neuronal apoptosis and the role of the Wnt/PCP-Jnk pathway in mediating the preventive effects of taurine on neural tube defects (NTDs). HT-22 cells (a hippocampal neuron cell line) were divided into a control group, a glutamate-induced apoptosis group, and glutamate (4.0 mmol/L) plus low-dose taurine (L; 0.5 mmol/L) and high-dose taurine (H; 2.0 mmol/L) groups. The MTT assay was used to monitor cell proliferation and cell survival. Immunofluorescence and Western blot analyses were used to determine caspase 9 expression...
July 17, 2017: Amino Acids
https://www.readbyqxmd.com/read/28701710/deficient-vitamin-e-uptake-during-development-impairs-neural-tube-closure-in-mice-lacking-lipoprotein-receptor-sr-bi
#19
Nicolás Santander, Carlos Lizama, María José Parga, Alonso Quiroz, Druso Pérez, Guadalupe Echeverría, Lorena Ulloa, Verónica Palma, Attilio Rigotti, Dolores Busso
SR-BI is the main receptor for high density lipoproteins (HDL) and mediates the bidirectional transport of lipids, such as cholesterol and vitamin E, between these particles and cells. During early development, SR-BI is expressed in extraembryonic tissue, specifically in trophoblast giant cells in the parietal yolk sac. We previously showed that approximately 50% of SR-BI(-/-) embryos fail to close the anterior neural tube and develop exencephaly, a perinatal lethal condition. Here, we evaluated the role of SR-BI in embryonic vitamin E uptake during murine neural tube closure...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28695418/csf-based-analysis-for-identification-of-potential-serum-biomarkers-of-neural-tube-defects
#20
Xinyu Yan, Lixin Mai, Changchun Lin, Wenji He, Gengsheng Yin, Jiakang Yu, Lian Huang, Sanqiang Pan
The protein composition of cerebrospinal fluid (CSF) in neural tube defects (NTDs) remains unknown. We investigated the protein composition of CSF from 9 infants with NTDs using isobaric tags for relative and absolute quantitation (iTRAQ). We identified 568 proteins in the CSF of infants with spina bifida, which is the most common type of NTD. Among these, 18 proteins were associated with neural tube closure in the CSF during human embryonic neurulation and 5 were involved in NTDs. Based on these results, an animal model was further utilized to investigate early serum biomarkers for NTDs...
August 2017: Neuroscience Bulletin
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