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By Estuardo Tercero MD, Guat. UFM
Angela M Caliendo, Richard L Hodinka
New England Journal of Medicine, Volume 377, Issue 17, Page 1685-1687, October 2017.
October 26, 2017: New England Journal of Medicine
Muhammad A B Shabbir, Haihong Hao, Muhammad Z Shabbir, Qin Wu, Adeel Sattar, Zonghui Yuan
Bacteriophages are the most common entities on earth and represent a constant challenge to bacterial populations. To fend off bacteriophage infection, bacteria evolved immune systems to avert phage adsorption and block invader DNA entry. They developed restriction-modification systems and mechanisms to abort infection and interfere with virion assembly, as well as newly recognized clustered regularly interspaced short palindromic repeats (CRISPR). In response to bacterial immune systems, bacteriophages synchronously evolved resistance mechanisms, such as the anti-CRISPR systems to counterattack bacterial CRISPR-cas systems, in a continuing evolutionary arms race between virus and host...
2016: Frontiers in Microbiology
Asma Hatoum-Aslan, Luciano A Marraffini
CRISPR-Cas systems protect prokaryotes from viruses and plasmids and function primarily as an adaptive immune system in these organisms. Recent discoveries, however, revealed unexpected roles for CRISPR loci as barriers to horizontal gene transfer and as modulators of gene expression. We review how both of these functions of CRISPR-Cas systems can affect the emergence and virulence of human bacterial pathogens.
February 2014: Current Opinion in Microbiology
Julie A Jacob
No abstract text is available yet for this article.
December 22, 2015: JAMA: the Journal of the American Medical Association
Chengzu Long, Leonela Amoasii, Alex A Mireault, John R McAnally, Hui Li, Efrain Sanchez-Ortiz, Samadrita Bhattacharyya, John M Shelton, Rhonda Bassel-Duby, Eric N Olson
CRISPR/Cas9-mediated genome editing holds clinical potential for treating genetic diseases, such as Duchenne muscular dystrophy (DMD), which is caused by mutations in the dystrophin gene. To correct DMD by skipping mutant dystrophin exons in postnatal muscle tissue in vivo, we used adeno-associated virus-9 (AAV9) to deliver gene-editing components to postnatal mdx mice, a model of DMD. Different modes of AAV9 delivery were systematically tested, including intraperitoneal at postnatal day 1 (P1), intramuscular at P12, and retro-orbital at P18...
January 22, 2016: Science
Christopher E Nelson, Chady H Hakim, David G Ousterout, Pratiksha I Thakore, Eirik A Moreb, Ruth M Castellanos Rivera, Sarina Madhavan, Xiufang Pan, F Ann Ran, Winston X Yan, Aravind Asokan, Feng Zhang, Dongsheng Duan, Charles A Gersbach
Duchenne muscular dystrophy (DMD) is a devastating disease affecting about 1 out of 5000 male births and caused by mutations in the dystrophin gene. Genome editing has the potential to restore expression of a modified dystrophin gene from the native locus to modulate disease progression. In this study, adeno-associated virus was used to deliver the clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 system to the mdx mouse model of DMD to remove the mutated exon 23 from the dystrophin gene...
January 22, 2016: Science
Goran Kungulovski, Albert Jeltsch
Epigenome editing refers to the directed alteration of chromatin marks at specific genomic loci by using targeted EpiEffectors which comprise designed DNA recognition domains (zinc finger, TAL effector, or modified CRISPR/Cas9 complex) and catalytic domains from a chromatin-modifying enzyme. Epigenome editing is a promising approach for durable gene regulation, with many applications in basic research including the investigation of the regulatory functions and logic of chromatin modifications and cellular reprogramming...
February 2016: Trends in Genetics: TIG
Tadas Jakočiūnas, Michael K Jensen, Jay D Keasling
One of the key drivers for successful metabolic engineering in microbes is the efficacy by which genomes can be edited. As such there are many methods to choose from when aiming to modify genomes, especially those of model organisms like yeast and bacteria. In recent years, clustered regularly interspaced palindromic repeats (CRISPR) and its associated proteins (Cas) have become the method of choice for precision genome engineering in many organisms due to their orthogonality, versatility and efficacy. Here we review the strategies adopted for implementation of RNA-guided CRISPR/Cas9 genome editing with special emphasis on their application for metabolic engineering of yeast and bacteria...
March 2016: Metabolic Engineering
Karen L Maxwell
No abstract text is available yet for this article.
January 2016: PLoS Pathogens
Jennifer Doudna
No abstract text is available yet for this article.
December 24, 2015: Nature
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