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https://www.readbyqxmd.com/read/29036827/validation-by-magnetic-resonance-imaging-of-the-diagnostic-potential-of-a-heptapeptide-functionalized-imaging-probe-targeted-to-amyloid-%C3%AE-and-able-to-cross-the-blood-brain-barrier
#1
Séverine André, Emilie Ansciaux, Elamine Saidi, Lionel Larbanoix, Dimitri Stanicki, Denis Nonclercq, Luce Vander Elst, Sophie Laurent, Robert N Muller, Carmen Burtea
The diagnosis of Alzheimer's disease (AD) is a critical step in the management of patients. We have developed a non-invasive diagnosis tool based on magnetic resonance molecular imaging (MRMI) of amyloid-β peptide using ultra-small particles of iron oxide (USPIO) functionalized with a disulfide constrained cyclic heptapeptide (PHO) identified by phage display (USPIO-PHO). After previously demonstrating the optimal pharmacologic properties of USPIO-PHO and its capacity to cross the blood-brain barrier (BBB), the ability of USPIO-PHO to target amyloid plaques (AP) by MRMI has been validated in the present work on AD transgenic mice...
October 12, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29036814/curcumin-ameliorates-neuroinflammation-neurodegeneration-and-memory-deficits-in-p25-transgenic-mouse-model-that-bears-hallmarks-of-alzheimer-s-disease
#2
Jeyapriya Raja Sundaram, Charlene Priscilla Poore, Noor Hazim Bin Sulaimee, Tej Pareek, Wei Fun Cheong, Markus R Wenk, Harish C Pant, Sally A Frautschy, Chian-Ming Low, Sashi Kesavapany
Several studies have indicated that neuroinflammation is indeed associated with neurodegenerative disease pathology. However, failures of recent clinical trials of anti-inflammatory agents in neurodegenerative disorders have emphasized the need to better understand the complexity of the neuroinflammatory process in order to unravel its link with neurodegeneration. Deregulation of Cyclin-dependent kinase 5 (Cdk5) activity by production of its hyperactivator p25 is involved in the formation of tau and amyloid pathology reminiscent of Alzheimer's disease (AD)...
October 12, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29036671/crispr-cas9-mediated-gene-knockout-is-insensitive-to-target-copy-number-but-is-dependent-on-guide-rna-potency-and-cas9-sgrna-threshold-expression-level
#3
Garmen Yuen, Fehad J Khan, Shaojian Gao, Jayne M Stommel, Eric Batchelor, Xiaolin Wu, Ji Luo
CRISPR/Cas9 is a powerful gene editing tool for gene knockout studies and functional genomic screens. Successful implementation of CRISPR often requires Cas9 to elicit efficient target knockout in a population of cells. In this study, we investigated the role of several key factors, including variation in target copy number, inherent potency of sgRNA guides, and expression level of Cas9 and sgRNA, in determining CRISPR knockout efficiency. Using isogenic, clonal cell lines with variable copy numbers of an EGFP transgene, we discovered that CRISPR knockout is relatively insensitive to target copy number, but is highly dependent on the potency of the sgRNA guide sequence...
September 25, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29036654/detection-of-expanded-rna-repeats-using-thermostable-group-ii-intron-reverse-transcriptase
#4
Samuel T Carrell, Zhenzhi Tang, Sabine Mohr, Alan M Lambowitz, Charles A Thornton
Cellular accumulation of repetitive RNA occurs in several dominantly-inherited genetic disorders. Expanded CUG, CCUG or GGGGCC repeats are expressed in myotonic dystrophy type 1 (DM1), myotonic dystrophy type 2 (DM2), or familial amyotrophic lateral sclerosis, respectively. Expanded repeat RNAs (ER-RNAs) exert a toxic gain-of-function and are prime therapeutic targets in these diseases. However, efforts to quantify ER-RNA levels or monitor knockdown are confounded by stable structure and heterogeneity of the ER-RNA tract and background signal from non-expanded repeats...
October 3, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29036625/ospht1-8-a-phosphate-transporter-is-involved-in-auxin-and-phosphate-starvation-response-in-rice
#5
Hongfang Jia, Songtao Zhang, Lizhi Wang, Yongxia Yang, Hongying Zhang, Hong Cui, Huifang Shao, Guohua Xu
The responses of plants to auxin and phosphate (Pi) starvation are closely linked. However, the underlying mechanisms connecting the Pi starvation (-Pi) responses to auxin are largely unclear. Here, we show that OsPht1;8 (OsPT8), a phosphate transporter, functions in both the auxin and -Pi responses in rice (Oryza sativa L.) and tobacco (Nicotiana tabacum). The overexpression of OsPT8 (OsPT8-Oe) led to the loss of sensitivity to auxin and -Pi in adventitious roots, lateral roots, and root hairs in rice. The expression levels of OsPT8 and pOsPT8::GUS staining in roots, root-shoot junctions and leaves of rice were induced by IAA treatments...
September 23, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29036515/the-jasmonate-zim-domain-gene-family-mediates-ja-signaling-and-stress-response-in-cotton
#6
Heng Sun, Lin Chen, Jianying Li, Meiling Hu, Abid Ullah, Xin He, Xiyan Yang, Xianlong Zhang
JASMONATE ZIM-domain (JAZ) family proteins are involved in regulating diverse biological processes in plants. However, their functions have not been well characterized in cotton (Gossypium spp.). In the present study, 13, 15, 25, and 30 JAZ genes were identified in Gossypium arboretum, Gossypium raimondii, Gossypium barbadense and Gossypium hirsutum respectively, based on gene homology. Selection and variation analyses showed that the SNP density of GhJAZ genes in wild species was much higher than that in domesticated species...
October 3, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29036458/metabolic-syndrome-induces-over-expression-of-the-human-at1r-a-haplotype-dependent-effect-with-implications-on-cardio-renal-function
#7
Sudhir Jain, Nitin Puri, Anita Rana, Natalie Sirianni, Brahmaraju Mopidevi, Ashok Kumar
Background: The transcriptional regulation of the human AT1R gene in pathophysiologies, like the metabolic syndrome, is poorly understood. The human AT1R gene has polymorphisms in its promoter that can be arranged in two haplotypes. Variants -810T, -713T, -214A, and -153A always occur together (Hap-I) and variants -810A, -713G, -214C, and -153G form Hap-II. We have hypothesized that high fat diet will alter cellular transcriptional milieu and increase hAT1R gene expression in a haplotype-dependent manner...
October 5, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/29036441/the-role-of-the-er-stress-response-protein-perk-in-rhodopsin-retinitis-pigmentosa
#8
Dimitra Athanasiou, Monica Aguila, James Bellingham, Naheed Kanuga, Peter Adamson, Michael E Cheetham
Mutations in rhodopsin, the light sensitive protein of rod cells, are the most common cause of dominant retinitis pigmentosa (RP), a type of inherited blindness caused by the dysfunction and death of photoreceptor cells. The P23H mutation, the most frequent single cause of RP in the USA, causes rhodopsin misfolding and induction of the unfolded protein response (UPR), an adaptive ER stress response and signalling network that aims to enhance the folding and degradation of misfolded proteins to restore proteostasis...
September 27, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29036344/comparison-of-the-in-vivo-induction-and-transmission-of-%C3%AE-synuclein-pathology-by-mutant-%C3%AE-synuclein-fibril-seeds-in-transgenic-mice
#9
Nicola J Rutherford, Jess-Karan S Dhillon, Cara J Riffe, Jasie K Howard, Mieu Brooks, Benoit I Giasson
Parkinson's disease is one of many neurodegenerative diseases termed synucleinopathies, neuropathologically defined by inclusions containing aggregated α-synuclein. α-synuclein gene (SNCA) mutations can directly cause autosomal dominant Parkinson's disease. In vitro studies demonstrated that SNCA missense mutations may either enhance or diminish α-synuclein aggregation but cross seeding of mutant and wild-type α-synuclein proteins appear to reduce aggregation efficiency. Here we extended these studies by assessing the effects of seeded α-synuclein aggregation in α-synuclein transgenic mice through intracerebral or peripheral injection of various mutant α-synuclein fibrils...
September 27, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29036229/cloning-and-characterization-of-the-cerasus-humilis-sucrose-phosphate-synthase-gene-chsps1
#10
Juan Wang, Junjie Du, Xiaopeng Mu, Pengfei Wang
Sucrose is crucial to the growth and development of plants, and sucrose phosphate synthase (SPS) plays a key role in sucrose synthesis. To understand the genetic and molecular mechanisms of sucrose synthesis in Cerasus humilis, ChSPS1, a homologue of SPS, was cloned using RT-PCR. Sequence analysis showed that the open reading frame (ORF) sequence of ChSPS1 is 3174 bp in length, encoding a predicted protein of 1057 amino acids. The predicted protein showed a high degree of sequence identity with SPS homologues from other species...
2017: PloS One
https://www.readbyqxmd.com/read/29036025/the-fate-of-the-adipose-derived-stromal-cells-during-angiogenesis-and-adipogenesis-after-cell-assisted-lipotransfer
#11
Ki Yong Hong, Sangjun Yim, Hyun Jung Kim, Ung Sik Jin, SooA Lim, SuRak Eo, Hak Chang, Kyung Won Minn
BACKGROUND: Cell-assisted lipotransfer (CAL) is a process in which fat grafting is supplemented with autologous adipose-derived stromal cells (ASCs). Since the efficacy of the technique was demonstrated, studies have focused on the mechanism by which CAL enhances the rate of graft survival. However, the microenvironmental changes in donor and recipient tissue associated with CAL remain unclear. METHODS: We introduced an animal model of CAL using two different transgenic reporter mice...
October 12, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29035843/generation-of-a-human-control-pbmc-derived-ips-cell-line-tusmi001-a-from-a-healthy-male-donor-of-han-chinese-genetic-background
#12
Ying Wang, Yue Zhang, Jing Zhang, Jing Lu, Chaowen Yang, Jian Zhao, Gang Li, Zhongmin Liu, Ying Lei
A 59-year old healthy man of Han Chinese genetic background donated his peripheral blood mononuclear cells (PBMC). The non-integrating episomal vector system was used to reprogram his PBMCs with the human OSKM (Oct4, Sox2, Kl4 and c-Myc) transcription factors. The pluripotency of transgene-free iPSCs was confirmed by immunocytochemistry for pluripotency markers and by the ability of the iPSCs to differentiate spontaneously into 3 germ layers in vitro. In addition, the iPSC line displayed a normal karyotype...
October 6, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29035625/chickens-with-humanized-immunoglobulin-genes-generate-antibodies-with-high-affinity-and-broad-epitope-coverage-to-conserved-targets
#13
Kathryn H Ching, Ellen J Collarini, Yasmina N Abdiche, Daniel Bedinger, Darlene Pedersen, Shelley Izquierdo, Rian Harriman, Lei Zhu, Robert J Etches, Marie-Cecile van de Lavoir, William D Harriman, Philip A Leighton
Transgenic animal platforms for the discovery of human monoclonal antibodies have been developed in mice, rats, rabbits and cows. The immune response to human proteins is limited in these animals by their tolerance to mammalian-conserved epitopes. To expand the range of epitopes that are accessible, we have chosen an animal host that is less phylogenetically related to humans. Specifically, we generated transgenic chickens expressing antibodies from immunoglobulin heavy and light chain loci containing human variable regions and chicken constant regions...
October 16, 2017: MAbs
https://www.readbyqxmd.com/read/29034892/generation-of-a-human-induced-pluripotent-stem-cell-line-from-a-65-year-old-healthy-female-donor-with-chinese-han-genetic-background
#14
Ying Wang, Jing Zhang, Yue Zhang, Danyi Huang, Jian Zhao, Gang Li, Ying Lei
Peripheral blood mononuclear cells (PBMC) were collected from a 65-year old healthy woman with Chinese Han genetic background. The PBMCs were reprogrammed with the human OKSM transcription factors using the non-integrating episomal vector system. The transgene-free iPSC showed pluripotency verified by immunocytochemistry for pluripotency markers and differentiated spontaneously toward the 3 germ layers in vitro. Furthermore, the iPSC line showed normal karyotype. The iPSC line can be used as control in disease mechanism studies...
October 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29034884/generation-of-six-multiple-sclerosis-patient-derived-induced-pluripotent-stem-cell-lines
#15
L Miquel-Serra, A Duarri, Y Muñoz, B Kuebler, B Aran, C Costa, M Martí, M Comabella, S Malhotra, X Montalban, A Veiga, A Raya
Multiple sclerosis (MS) is considered a chronic autoimmune disease of the central nervous system that leads to gliosis, demyelination, axonal damage and neuronal death. The MS disease aetiology is unknown, though a polymorphism of the TNFRSF1A gene, rs1800693, is known to confer an increased risk for MS. Using retroviral delivery of reprogramming transgenes, we generated six MS patient-specific iPSC lines with two distinct genotypes, CC or TT, of the polymorphism rs1800693. iPSC lines had normal karyotype, expressed pluripotency genes and differentiated into the three germ layers...
October 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29034877/generation-of-an-induced-pluripotent-stem-cell-ipsc-line-from-a-patient-with-autosomal-dominant-retinitis-pigmentosa-due-to-a-mutation-in-the-nr2e3-gene
#16
Angélique Terray, Amélie Slembrouck, Céline Nanteau, Christel Chondroyer, Christina Zeitz, José-Alain Sahel, Isabelle Audo, Sacha Reichman, Olivier Goureau
A human iPSC line was generated from fibroblasts of a patient affected with autosomal dominant Retinitis Pigmentosa (RP) carrying the mutation p.Gly56Arg in the NR2E3 gene. The transgene-free iPSCs were generated with the human OSKM transcription factors using the Sendai-virus reprogramming system. iPSCs contained the expected c.166G>A substitution in exon 2 of NR2E3, expressed the expected pluripotency markers, displayed in vivo differentiation potential to the three germ layers and had normal karyotype...
October 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29034628/-screening-of-full-human-anthrax-lethal-factor-neutralizing-antibody-in-transgenic-mice
#17
Xiaolin Wang, Xiangyang Chi, Ju Liu, Weicen Liu, Shuling Liu, Shunfang Qiu, Zhonghua Wen, Pengfei Fan, Kun Liu, Xiaohong Song, Ling Fu, Jun Zhang, Changming Yu
Anthrax is a highly lethal infectious disease caused by the spore-forming bacterium Bacillus anthracis. The major virulence factor of B. anthracis consists of protective antigen (PA), lethal factor (LF) and edema factor (EF). PA binds with LF to form lethal toxin (LT), and PA binds with EF to form edema toxin (ET). Antibiotics is hard to work in advanced anthrax infections, because injuries and deaths of the infected are mainly caused by lethal toxin (LT). Thus, the therapeutic neutralizing antibody is the most effective treatment of anthrax...
November 25, 2016: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/29034627/-detection-of-transgenic-components-in-animal-feeds-on-shanxi-markets
#18
Jianqin Yuan, Hong Chang, Jianghe Zhao, Zhongwei Tang, Zongyong Shi, Jundong Wang
To assess the presence of genetically modified (GM) maize and soybean in a range of commercialized feed in Shanxi province of China in 2015, improved hexadecyltrimethy ammonium bromide (CTAB) method was used to extract DNA. The screening of packed feeds was carried out by qualitative PCR. Then positive feeds were unpacked and detected by the CaMV 35S promoter, NOS terminator, zSSIIb, Lectin and CryIA (b) genes. The identified maize and soybean events were confirmed by event-specific MON810 and GTS40-3-2. Results showed that 83...
November 25, 2016: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/29033958/enhanced-bacterial-wilt-resistance-in-potato-through-expression-of-arabidopsis-efr-and-introgression-of-quantitative-resistance-from-solanum-commersonii
#19
Federico Boschi, Claudia Schvartzman, Sara Murchio, Virginia Ferreira, Maria I Siri, Guillermo A Galván, Matthew Smoker, Lena Stransfeld, Cyril Zipfel, Francisco L Vilaró, Marco Dalla-Rizza
Bacterial wilt (BW) caused by Ralstonia solanacearum is responsible for substantial losses in cultivated potato (Solanum tuberosum) crops worldwide. Resistance genes have been identified in wild species; however, introduction of these through classical breeding has achieved only partial resistance, which has been linked to poor agronomic performance. The Arabidopsis thaliana (At) pattern recognition receptor elongation factor-Tu (EF-Tu) receptor (EFR) recognizes the bacterial pathogen-associated molecular pattern EF-Tu (and its derived peptide elf18) to confer anti-bacterial immunity...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29033953/development-and-characterization-of-transgenic-sugarcane-with-insect-resistance-and-herbicide-tolerance
#20
Wen Zhi Wang, Ben Peng Yang, Xiao Yan Feng, Zheng Ying Cao, Cui Lian Feng, Jun Gang Wang, Guo Ru Xiong, Lin Bo Shen, Jun Zeng, Ting Ting Zhao, Shu Zhen Zhang
Genetically modified crops which had been commercial applied extensively majorly are the insect resistance and herbicide tolerance events. In this study, the Bt insecticidal gene Cry1Ab, the glyphosate-tolerant gene EPSPS, and the selection marker gene PMI were combined into a single transferred DNA fragment and introduced into sugarcane by Agrobacterium-mediated transformation. Thirty-three resistant plantlets were obtained after selection using a PMI/mannose selection system. Thirty of these resistant plantlets were PCR positive for the three target genes...
2017: Frontiers in Plant Science
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