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https://www.readbyqxmd.com/read/29333573/simultaneous-site-directed-mutagenesis-of-duplicated-loci-in-soybean-using-a-single-guide-rna
#1
Yuhei Kanazashi, Aya Hirose, Ippei Takahashi, Masafumi Mikami, Masaki Endo, Sakiko Hirose, Seiichi Toki, Akito Kaga, Ken Naito, Masao Ishimoto, Jun Abe, Tetsuya Yamada
Using a gRNA and Agrobacterium-mediated transformation, we performed simultaneous site-directed mutagenesis of two GmPPD loci in soybean. Mutations in GmPPD loci were confirmed in at least 33% of T2 seeds. The clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated endonuclease 9 (Cas9) system is a powerful tool for site-directed mutagenesis in crops. Using a single guide RNA (gRNA) and Agrobacterium-mediated transformation, we performed simultaneous site-directed mutagenesis of two homoeologous loci in soybean (Glycine max), GmPPD1 and GmPPD2, which encode the orthologs of Arabidopsis thaliana PEAPOD (PPD)...
January 15, 2018: Plant Cell Reports
https://www.readbyqxmd.com/read/29333004/drosha-rs642321-polymorphism-influence-susceptibility-to-childhood-acute-lymphoblastic-leukemia-a-preliminary-report
#2
Mohammad Hashemi, Seyed-Shahaboddin Hasani, Majid Naderi
Introduction: It has been well known that the microRNA biogenesis is involved in the pathogenesis of various diseases. We investigated the possible association between DROSHA rs642321 variant and risk of acute lymphocytic leukemia (ALL). Materials and Methods: We genotyped 75 children diagnosed with ALL and 115 age- and sex-matched children with no history of cancer of any type (as the control group) by the tetra amplification refractory mutation system-polymerase chain reaction...
October 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/29332303/mitochondrial-dna-nuclear-context-and-the-risk-for-carcinogenesis
#3
REVIEW
Brett A Kaufman, Martin Picard, Neal Sondheimer
The inheritance of mitochondrial DNA (mtDNA) from mother to child is complicated by differences in the stability of the mitochondrial genome. Although the germ line mtDNA is protected through the minimization of replication between generations, sequence variation can occur either through mutation or due to changes in the ratio between distinct genomes that are present in the mother (known as heteroplasmy). Thus, the unpredictability in transgenerational inheritance of mtDNA may cause the emergence of pathogenic mitochondrial and cellular phenotypes in offspring...
January 14, 2018: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/29331982/a-false-carrier-state-for-the-c-579g-a-mutation-in-the-ncf1-gene-in-ashkenazi-jews
#4
Martin De Boer, Ronit Gavrieli, Karin van Leeuwen, Haike Reznik Wolf, Maya Dushnitzki, Yifaat Bar-Yosef, Anat Bar-Ziv, Doron Behar, Shlomo Lipitz, Tal Elkan Miller, Anton T J Tool, Taco W Kuijpers, Timo K van den Berg, Baruch Wolach, Dirk Roos, Elon Pras
BACKGROUND: Mutations in the NCF1 gene that encodes p47phox, a subunit of the NADPH oxidase complex, cause chronic granulomatous disease (CGD). In Kavkazi Jews, a c.579G>A (p.Trp193Ter) mutation in NCF1 is frequently found, leading to CGD. The same mutation is found in about 1% of Ashkenazi Jews, although Ashkenazi CGD patients with this mutation have never been described. METHODS: We used Sanger sequencing, multiplex ligation-dependent probe amplification (MLPA), gene scan analysis and Ion Torrent Next Generation Sequencing for genetic analysis, and measured NADPH oxidase activity and p47phox expression...
January 13, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29331980/dmc1-mutation-that-causes-human-non-obstructive-azoospermia-and-premature-ovarian-insufficiency-identified-by-whole-exome-sequencing
#5
Wen-Bin He, Chao-Feng Tu, Qiang Liu, Lan-Lan Meng, Shi-Min Yuan, Ai-Xiang Luo, Fu-Sheng He, Juan Shen, Wen Li, Juan Du, Chang-Gao Zhong, Guang-Xiu Lu, Ge Lin, Li-Qing Fan, Yue-Qiu Tan
BACKGROUND: The genetic causes of the majority of male and female infertility caused by human non-obstructive azoospermia (NOA) and premature ovarian insufficiency (POI) with meiotic arrest are unknown. OBJECTIVE: To identify the genetic cause of NOA and POI in two affected members from a consanguineous Chinese family. METHODS: We performed whole-exome sequencing of DNA from both affected patients. The identified candidate causative gene was further verified by Sanger sequencing for pedigree analysis in this family...
January 13, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29330913/the-mechanism-of-diflufenican-resistance-and-its-inheritance-in-oriental-mustard-sisymbrium-orientale-l-from-australia
#6
Hue Thi Dang, Jenna Moira Malone, Peter Boutsalis, Gurjeet Gill, Christopher Preston
BACKGROUND: An oriental mustard population (P3) collected near Quambatook, Victoria was identified resistant to diflufenican by screening with the field rate (200 g a.i. ha-1 ) of the herbicide. The mechanism (s) of diflufenican resistance and its inheritance in this population was therefore investigated. RESULTS: Dose-response experiment confirmed population P3 was 140-fold more resistant to diflufenican as determined by the comparison of LD50 values with the susceptible populations...
January 13, 2018: Pest Management Science
https://www.readbyqxmd.com/read/29330334/detection-of-heterozygous-mutation-in-hook-microtubule-tethering-protein-1-in-three-patients-with-decapitated-and-decaudated-spermatozoa-syndrome
#7
Huixing Chen, Yong Zhu, Zijue Zhu, Erlei Zhi, Keming Lu, Xiaobo Wang, Feng Liu, Zheng Li, Weiliang Xia
BACKGROUND: The mechanism of intramanchette transport is crucial to the transformation of sperm tail and the nuclear condensation during spermiogenesis. Although few dysfunctional proteins could result in abnormal junction between the head and tail of spermatozoon, little is known about the genetic cues in this process. OBJECTIVE: Based on patients with severe decapitated and decaudated spermatozoa (DDS) syndrome, the study aimed to validate whether new mutation exists on their Hook microtubule-tethering protein 1 (HOOK1) genes and follow their results of assisted reproduction treatment (ART)...
January 12, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29329938/pipeline-to-gene-discovery-analysing-familial-parkinsonism-in-the-queensland-parkinson-s-project
#8
Steven R Bentley, Stephanie Bortnick, Ilaria Guella, Javed Y Fowdar, Peter A Silburn, Stephen A Wood, Matthew J Farrer, George D Mellick
INTRODUCTION: Family based study designs provide an informative resource to identify disease-causing mutations. The Queensland Parkinson's Project (QPP) has been involved in numerous genetic screening studies; however, details of the families enrolled into the register have not been comprehensively reported. This article characterises the families enrolled in the QPP and summarises monogenic forms of hereditary Parkinsonism found in the register. METHOD: The presence of pathogenic point mutations and copy number variations (CNVs) were, generally, screened in a sample of over 1000 PD patients from the total of 1725...
January 3, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29328376/identification-of-a-novel-compound-heterozygous-mutation-of-the-cyp21a2-gene-causing-21%C3%A2-hydroxylase-deficiency-in-a-chinese-pedigree
#9
Jia Liu, Xiujuan Zhang, Haiqing Zhang, Li Fang, Jin Xu, Qingbo Guan, Chao Xu
21‑Hydroxylase deficiency (21‑OHD) is the most common cause of congenital adrenal hyperplasia. Inherited in an autosomal recessive manner, 21‑OHD is caused by mutations in the cytochrome P450 family 21 subfamily A member 2 (CYP21A2) gene. The present study was designed to investigate the genetic characteristics of one Chinese pedigree and to identify the genotype‑phenotype association, thereby facilitating the precise diagnosis of 21‑OHD at the molecular level. Members of a Chinese family with 21‑OHD were screened for mutations in the CYP21A2 gene...
January 8, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29327796/speech-characteristics-in-the-congenital-and-childhood-onset-forms-of-myotonic-dystrophy-type-1
#10
Lotta Sjögreen, Åsa Mårtensson, Anne-Berit Ekström
BACKGROUND: Myotonic dystrophy type 1 (DM1) is a slowly progressive multi-systemic disease with an autosomal-dominant inheritance caused by a mutation on chromosome 19 (19q13.3). AIMS: To explore speech characteristics in a group of individuals with the congenital and childhood-onset forms of DM1 in terms of intelligibility, speech-sound production, nasality and compensatory articulation. A further aim was to analyse whether speech characteristics were correlated to subforms of DM1 and if speech outcome could be related to muscle strength...
January 12, 2018: International Journal of Language & Communication Disorders
https://www.readbyqxmd.com/read/29327502/a-differential-diagnosis-of-a-head-and-neck-bony-lesion-review-of-a-case-series-with-18-patients-with-extra-intestinal-features-of-familial-adenomatous-polyposis
#11
Amy Dickinson, Laura Koskenvuo, Katja Tuomainen, Antti Mäkitie, Anna Lepistö, Suvi Renkonen
We would like to draw to the attention of head and neck surgeons the following disease that can present first to head and neck specialists with either a head and neck lump or following an incidental finding on radiological imaging. Familial Adenomatous Polyposis (FAP) is a hereditary disease caused by a mutation in the APC gene on chromosome 5, which is inherited in an autosomal dominant fashion with complete penetrance but variable expression(1). However in approximately 25% of cases it arises from a de novo mutation of the APC gene(1)...
January 11, 2018: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29327071/diseases-of-complement-dysregulation-an-overview
#12
REVIEW
Edwin K S Wong, David Kavanagh
Atypical hemolytic uremic syndrome (aHUS), C3 glomerulopathy (C3G), and paroxysmal nocturnal hemoglobinuria (PNH) are prototypical disorders of complement dysregulation. Although complement overactivation is common to all, cell surface alternative pathway dysregulation (aHUS), fluid phase alternative pathway dysregulation (C3G), or terminal pathway dysregulation (PNH) predominates resulting in the very different phenotypes seen in these diseases. The mechanism underlying the dysregulation also varies with predominant acquired autoimmune (C3G), somatic mutations (PNH), or inherited germline mutations (aHUS) predisposing to disease...
January 11, 2018: Seminars in Immunopathology
https://www.readbyqxmd.com/read/29325627/epigenetic-mechanisms-underlying-nervous-system-diseases
#13
Irfan A Qureshi, Mark F Mehler
Epigenetic mechanisms act as control systems for modulating genomic structure and activity in response to evolving profiles of cell-extrinsic, cell-cell, and cell-intrinsic signals. These dynamic processes are responsible for mediating cell- and tissue-specific gene expression and function and gene-gene and gene-environmental interactions. The major epigenetic mechanisms include DNA methylation and hydroxymethylation; histone protein posttranslational modifications, nucleosome remodeling/repositioning, and higher-order chromatin reorganization; noncoding RNA regulation; and RNA editing...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325626/fragile-x-syndrome-and-fragile-x-associated-tremor-ataxia-syndrome
#14
Deborah A Hall, Elizabeth Berry-Kravis
Fragile X-associated disorders encompass several conditions, which are caused by expansion mutations in the fragile X mental retardation 1 (FMR1) gene. Fragile X syndrome is the most common inherited etiology of intellectual disability and results from a full mutation or >200 CGG repeats in FMR1. It is associated with developmental delay, autism spectrum disorder, and seizures. Fragile X-associated tremor/ataxia syndrome is a progressive neurodegenerative disease that occurs in premutation carriers of 55-200 CGG repeats in FMR1 and is characterized by kinetic tremor, gait ataxia, parkinsonism, executive dysfunction, and neuropathy...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325616/huntington-disease
#15
Rhia Ghosh, Sarah J Tabrizi
Huntington disease is a monogenic neurodegenerative disorder that displays an autosomal-dominant pattern of inheritance. It is characterized by motor, psychiatric, and cognitive symptoms that progress over 15-20 years. Since the identification of the causative genetic mutation in 1993 much has been discovered about the underlying pathogenic mechanisms, but as yet there are no disease-modifying therapies available. This chapter reviews the epidemiology, genetic basis, pathogenesis, presentation, and clinical management of Huntington disease...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325615/inherited-dystonias-clinical-features-and-molecular-pathways
#16
Corinne E Weisheit, Samuel S Pappas, William T Dauer
Recent decades have witnessed dramatic increases in understanding of the genetics of dystonia - a movement disorder characterized by involuntary twisting and abnormal posture. Hampered by a lack of overt neuropathology, researchers are investigating isolated monogenic causes to pinpoint common molecular mechanisms in this heterogeneous disease. Evidence from imaging, cellular, and murine work implicates deficiencies in dopamine neurotransmission, transcriptional dysregulation, and selective vulnerability of distinct neuronal populations to disease mutations...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325612/genetics-of-parkinson-disease
#17
Aloysius Domingo, Christine Klein
An understanding of the genetic etiology of Parkinson disease (PD) has become imperative for the modern-day neurologist. Although genetic forms cause only a minority of PD, the disease mechanisms they elucidate advance the understanding of idiopathic cases. Moreover, recently identified susceptibility variants contribute to complex-etiology PD and broaden the contribution of genetics beyond familial and early-onset cases. Dominantly inherited monogenic forms mimic idiopathic PD and are caused by mutations or copy number variations of SNCA, LRRK2, and VPS35...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325606/repeat-expansion-diseases
#18
Henry Paulson
More than 40 diseases, most of which primarily affect the nervous system, are caused by expansions of simple sequence repeats dispersed throughout the human genome. Expanded trinucleotide repeat diseases were discovered first and remain the most frequent. More recently tetra-, penta-, hexa-, and even dodeca-nucleotide repeat expansions have been identified as the cause of human disease, including some of the most common genetic disorders seen by neurologists. Repeat expansion diseases include both causes of myotonic dystrophy (DM1 and DM2), the most common genetic cause of amyotrophic lateral sclerosis/frontotemporal dementia (C9ORF72), Huntington disease, and eight other polyglutamine disorders, including the most common forms of dominantly inherited ataxia, the most common recessive ataxia (Friedreich ataxia), and the most common heritable mental retardation (fragile X syndrome)...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325523/fanconi-anemia-with-sun-sensitivity-caused-by-a-xeroderma-pigmentosum-associated-missense-mutation-in-xpf
#19
Isabell Popp, Maqsood Punekar, Nick Telford, Stavros Stivaros, Kate Chandler, Meenakshi Minnis, Anna Castleton, Claire Higham, Louise Hopewell, D Gareth Evans, Anja Raams, Arjan F Theil, Stefan Meyer, Detlev Schindler
BACKGROUND: Fanconi anemia (FA) is an inherited genomic instability disorder with congenital and developmental abnormalities, bone marrow failure and predisposition to cancer early in life, and cellular sensitivity to DNA interstrand crosslinks. CASE PRESENTATION: A fifty-one-year old female patient, initially diagnosed with FA in childhood on the basis of classic features and increased chromosomal breakage, and remarkable sun-sensitivity is described. She only ever had mild haematological abnormalities and no history of malignancy...
January 11, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29325452/inherited-cancer-in-the-age-of-next-generation-sequencing
#20
Kristin S Price, Ashley Svenson, Elisabeth King, Kaylene Ready, Gabriel A Lazarin
Next-generation sequencing (NGS) technology has led to the ability to test for multiple cancer susceptibility genes simultaneously without significantly increasing cost or turnaround time. With growing usage of multigene testing for inherited cancer, ongoing education for nurses and other health-care providers about hereditary cancer screening is imperative to ensure appropriate testing candidate identification, test selection, and posttest management. The purpose of this review article is to (1) provide an overview of how NGS works to detect germline mutations, (2) summarize the benefits and limitations of multigene panel testing, (3) describe risk categories of cancer susceptibility genes, and (4) highlight the counseling considerations for patients pursuing multigene testing...
January 1, 2018: Biological Research for Nursing
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