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https://www.readbyqxmd.com/read/28724966/acetylation-induced-tdp-43-pathology-is-suppressed-by-an-hsf1-dependent-chaperone-program
#1
Ping Wang, Connor M Wander, Chao-Xing Yuan, Michael S Bereman, Todd J Cohen
TDP-43 pathology marks a spectrum of multisystem proteinopathies including amyotrophic lateral sclerosis, frontotemporal lobar degeneration, and sporadic inclusion body myositis. Surprisingly, it has been challenging to recapitulate this pathology, highlighting an incomplete understanding of TDP-43 regulatory mechanisms. Here we provide evidence supporting TDP-43 acetylation as a trigger for disease pathology. Using cultured cells and mouse skeletal muscle, we show that TDP-43 acetylation-mimics promote TDP-43 phosphorylation and ubiquitination, perturb mitochondria, and initiate degenerative inflammatory responses that resemble sporadic inclusion body myositis pathology...
July 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28712938/ascl1-reorganizes-chromatin-to-direct-neuronal-fate-and-suppress-tumorigenicity-of-glioblastoma-stem-cells
#2
Nicole I Park, Paul Guilhamon, Kinjal Desai, Rochelle F McAdam, Ellen Langille, Madlen O'Connor, Xiaoyang Lan, Heather Whetstone, Fiona J Coutinho, Robert J Vanner, Erick Ling, Panagiotis Prinos, Lilian Lee, Hayden Selvadurai, Gurnit Atwal, Michelle Kushida, Ian D Clarke, Veronique Voisin, Michael D Cusimano, Mark Bernstein, Sunit Das, Gary Bader, Cheryl H Arrowsmith, Stephane Angers, Xi Huang, Mathieu Lupien, Peter B Dirks
Glioblastomas exhibit a hierarchical cellular organization, suggesting that they are driven by neoplastic stem cells that retain partial yet abnormal differentiation potential. Here, we show that a large subset of patient-derived glioblastoma stem cells (GSCs) express high levels of Achaete-scute homolog 1 (ASCL1), a proneural transcription factor involved in normal neurogenesis. ASCL1(hi) GSCs exhibit a latent capacity for terminal neuronal differentiation in response to inhibition of Notch signaling, whereas ASCL1(lo) GSCs do not...
July 11, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28706525/functional-marker-assisted-improvement-of-stable-cytoplasmic-male-sterile-lines-of-rice-for-bacterial-blight-resistance
#3
Jegadeesan Ramalingam, Palanisamy Savitha, Ganesh Alagarasan, Ramasamy Saraswathi, Ranganathan Chandrababu
Bacterial blight (BB), caused by Xanthomonas oryzae pv.oryzae is one among the major diseases in rice, which in severe condition cause losses up to 60% in total yield. Marker assisted pyramiding of three broad spectrum BB resistance genes (xa5, xa13, and Xa21) in prominent rice varieties is the most economical and effective strategy for the management of the BB disease. We report here the pyramiding of three genes (xa5, xa13, and Xa21) in maintainer lines (CO 2B, CO 23B, and CO 24B) of three promising wild abortive cytoplasmic male sterile lines (CO 2A, CO 23A, and CO 24A) through functional markers assisted back cross breeding...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28705494/inflammation-initiated-by-stressed-organelles
#4
Fabio Martinon
Key cellular functions including those related to energy metabolism, organization of the genetic information or production of membrane-bound and secreted proteins are compartmentalized within organelles. Various stresses such as differentiation programs, viral and bacterial infections, perturbations in protein production, mechanical constraints, changes in the environment and nutriment accessibility can impact cellular homeostasis and organelle integrity. Perturbations of these cellular compartments trigger repair and adaptation programs aimed at restoring homeostasis...
July 10, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28704148/-i-was-not-sick-and-i-didn-t-need-to-recover-methadone-maintenance-treatment-mmt-as-a-refuge-from-criminalization
#5
David Frank
BACKGROUND: Methadone Maintenance Treatment (MMT) in the United States (U.S.) has been undergoing a shift towards conceptualizing the program as recovery-based treatment. Although recovery is seen by some as a means to restore MMT to its rightful position as a medically-based treatment for addiction, it may not represent the experiences, or meet the needs of people who use drugs (PWUD), many of whom who use the program as a pragmatic means of reducing harms associated with criminalization...
July 13, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28699851/dynamics-of-cd4-cell-count-among-hiv-infected-individuals-in-lagos-nigeria
#6
Babatunde O Motayo, Babatunde A Olusola, Adedayo O Faneye, Solomon Aturaka, Olukunle Oluwasemowo, Joseph I Ogiogwa
Human Immunodeficiency virus (HIV) infection leads to progressive loss of CD4 T- cells. Antiretroviral therapy has been able to inhibit this process, resulting in significant level of immune recovery and function. Our aim is to investigate the dynamics of CD4 recovery among HIV patients in Lagos, Nigeria. 213 HIV positive individuals were enrolled between October 2007 and May 2008, and followed up for 9 months based on CD4 count, CD4 analysis was done by flow cytometry at enrolment and after every 3 months...
July 12, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28699572/oriental-metrology-and-the-politics-of-antiquity-in-nineteenth-century-survey-sciences
#7
Simon Schaffer
Argument Metrological techniques to establish shared quantitative measures have often been seen as signs of rational modernization. The cases considered here show instead the close relation of such techniques with antiquarian and revivalist programs under imperial regimes. Enterprises in survey sciences in Egypt in the wake of the French invasion of 1798 and in India during the East India Company's revenue surveys involved the promotion of a new kind of oriental metrology designed to represent colonizers' measures as restorations of ancient values to be applied to current systems of survey and measurement...
June 2017: Science in Context
https://www.readbyqxmd.com/read/28691825/small-molecule-recognition-triggers-secondary-and-tertiary-interactions-in-dna-folding-and-hammerhead-ribozyme-catalysis
#8
Jie Mao, Chris DeSantis, Dennis Bong
We have identified tris(2-aminoethyl)amine (tren)-derived scaffolds with two (t2M) or four (t4M) melamine rings that can target oligo T/U domains in DNA/RNA. Unstructured T-rich DNAs cooperatively fold with the tren derivatives to form hairpin-like structures. Both t2M and t4M act as functional switches in a family of hammerhead ribozymes deactivated by stem or loop replacement with a U-rich sequence. Catalysis of bond scission in these hammerhead ribozymes could be restored by putative t2M/t4M refolding of stem secondary structure or tertiary bridging interactions between loop and stem...
July 13, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28681046/long-term-in-vivo-effect-of-various-restorative-materials-on-enamel-and-dentin-of-primary-molars
#9
Elyiahu Mass, Alla Hassan, Ornit Cohen, Uri Zilberman
OBJECTIVE: To explore the long-term in-vivo effect of different dental restorative materials on the surrounding enamel and dentin, in primary molars. METHOD AND MATERIALS: Sixteen naturally exfoliated primary molars restored with amalgam, compomer, and glass-ionomer cement were collected after 2 to 5 years of function in the mouth. Four intact molars served as control. The teeth were sliced buccolingually and the ion content in the restorative material, the enamel, and the dentin surrounding the restoration was determined using a scanning electron microscopy-energy dispersive x-ray spectroscopy (SEM-EDS) program...
July 4, 2017: Quintessence International
https://www.readbyqxmd.com/read/28677680/ctcf-orchestrates-the-germinal-centre-transcriptional-program-and-prevents-premature-plasma-cell-differentiation
#10
Arantxa Pérez-García, Ester Marina-Zárate, Ángel F Álvarez-Prado, Jose M Ligos, Niels Galjart, Almudena R Ramiro
In germinal centres (GC) mature B cells undergo intense proliferation and immunoglobulin gene modification before they differentiate into memory B cells or long-lived plasma cells (PC). GC B-cell-to-PC transition involves a major transcriptional switch that promotes a halt in cell proliferation and the production of secreted immunoglobulins. Here we show that the CCCTC-binding factor (CTCF) is required for the GC reaction in vivo, whereas in vitro the requirement for CTCF is not universal and instead depends on the pathways used for B-cell activation...
July 5, 2017: Nature Communications
https://www.readbyqxmd.com/read/28674942/performance-bridging-the-gap-after-acl-surgery
#11
REVIEW
Polly de Mille, Jamie Osmak
PURPOSE OF REVIEW: The purpose of this paper is to identify strategies for a successful transition to sports in patients following rehabilitation for ACL reconstruction surgery (ACLR). RECENT FINDINGS: Recent research continues to demonstrate a relatively low rate of return to previous level of play among athletes following ACLR combined with a significant risk of injury to either the ipsi or the contralateral ACL. Recent research also demonstrates a growing use of a varied battery of assessments to determine readiness to return to sport as well as a lack of consensus on the ideal rehabilitation program, the criteria for clearance for return to play (both in time from surgery and functional milestones), and the nature of a conditioning program designed specifically for transitioning the cleared athlete back to competition...
July 3, 2017: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/28673339/human-limbal-fibroblast-like-stem-cells-induce-immune-tolerance-in-autoreactive-t-lymphocytes-from-female-patients-with-hashimoto-s-thyroiditis
#12
Antonina Coppola, Laura Tomasello, Maria Pitrone, Salvatore Cillino, Pierina Richiusa, Giuseppe Pizzolanti, Carla Giordano
BACKGROUND: Due to their "natural immune privilege" and immunoregulatory properties human fibroblast-like limbal stem cells (f-LSCs) have acquired great interest as a potential tool for achieving immunotolerance. Hashimoto's thyroiditis (HT) is the most common thyroid autoimmune disease and cause of hypothyroidism. To date, conventional hormone replacement therapy and unspecific immunosuppressive regimens cannot provide a definitive cure for HT subjects. We explored the immunosuppressant potential of human f-LSCs on circulating lymphomonocytes (PBMCs) collected from healthy donors and female HT patients...
July 3, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28659784/effects-of-assist-as-needed-upper-extremity-robotic-therapy-after-incomplete-spinal-cord-injury-a-parallel-group-controlled-trial
#13
John Michael Frullo, Jared Elinger, Ali Utku Pehlivan, Kyle Fitle, Kathryn Nedley, Gerard E Francisco, Fabrizio Sergi, Marcia K O'Malley
BACKGROUND: Robotic rehabilitation of the upper limb following neurological injury has been supported through several large clinical studies for individuals with chronic stroke. The application of robotic rehabilitation to the treatment of other neurological injuries is less developed, despite indications that strategies successful for restoration of motor capability following stroke may benefit individuals with incomplete spinal cord injury (SCI) as well. Although recent studies suggest that robot-aided rehabilitation might be beneficial after incomplete SCI, it is still unclear what type of robot-aided intervention contributes to motor recovery...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28656659/multidisciplinary-biopsychosocial-rehabilitation-for-subacute-low-back-pain
#14
REVIEW
Teresa J Marin, Dwayne Van Eerd, Emma Irvin, Rachel Couban, Bart W Koes, Antti Malmivaara, Maurits W van Tulder, Steven J Kamper
BACKGROUND: Low back pain (LBP) is associated with enormous personal and societal burdens, especially when it reaches the chronic stage of the disorder (pain for a duration of more than three months). Indeed, individuals who reach the chronic stage tend to show a more persistent course, and they account for the majority of social and economic costs. As a result, there is increasing emphasis on the importance of intervening at the early stages of LBP.According to the biopsychosocial model, LBP is a condition best understood with reference to an interaction of physical, psychological, and social influences...
June 28, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28648905/antibodies-against-immune-checkpoint-molecules-restore-functions-of-tumor-infiltrating-t-cells-in-hepatocellular-carcinomas
#15
Guoying Zhou, Dave Sprengers, Patrick P C Boor, Michail Doukas, Hannah Schutz, Shanta Mancham, Alexander Pedroza-Gonzalez, Wojciech G Polak, Jeroen de Jonge, Marcia Gaspersz, Haidong Dong, Kris Thielemans, Qiuwei Pan, Jan N M IJzermans, Marco J Bruno, Jaap Kwekkeboom
BACKGROUND & AIMS: Ligand binding to inhibitory receptors on immune cells, such as programmed cell death 1 (PD-1) and cytotoxic T-lymphocyte associated protein 4 (CTLA4), downregulates the T-cell-mediated immune response (called immune checkpoints). Antibodies that block these receptors increase anti-tumor immunity in patients with melanoma, non-small cell lung cancer, and renal cell cancer. Tumor-infiltrating CD4(+) and CD8(+) T cells in patients with hepatocellular carcinoma (HCC) have been found to be functionally compromised...
June 22, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28648662/a-sacrifice-for-survival-mechanism-protects-root-stem-cell-niche-from-chilling-stress
#16
Jing Han Hong, Maria Savina, Jing Du, Ajay Devendran, Karthikbabu Kannivadi Ramakanth, Xin Tian, Wei Shi Sim, Victoria V Mironova, Jian Xu
Temperature has a profound influence on plant and animal development, but its effects on stem cell behavior and activity remain poorly understood. Here, we characterize the responses of the Arabidopsis root to chilling (low but above-freezing) temperature. Chilling stress at 4°C leads to DNA damage predominantly in root stem cells and their early descendants. However, only newly generated/differentiating columella stem cell daughters (CSCDs) preferentially die in a programmed manner. Inhibition of the DNA damage response in these CSCDs prevents their death but makes the stem cell niche more vulnerable to chilling stress...
June 29, 2017: Cell
https://www.readbyqxmd.com/read/28633074/programming-cells-for-cardiac-repair
#17
REVIEW
Rocco Romagnuolo, Michael A Laflamme
Because the heart is a poorly regenerative organ, there has been considerable interest in developing novel cell-based approaches to restore lost contractile function after myocardial infarction (MI). While a wide variety of candidate cell types have been tested in animal MI models, the vast majority of clinical trials have used adult stem cell types, usually derived from bone marrow. These studies have generally yielded disappointing results, an outcome that may reflect in part the limited cardiogenic potential of the adult stem cell sources employed...
June 17, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28628551/a-clinical-framework-for-functional-recovery-in-a-person-with-chronic-traumatic-brain-injury-a-case-study
#18
Karen McCain, Staci Shearin
BACKGROUND AND PURPOSE: This case study describes a task-specific training program for gait walking and functional recovery in a young man with severe chronic traumatic brain injury. CASE DESCRIPTION: The individual was a 26-year-old man 4 years post-traumatic brain injury with severe motor impairments who had not walked outside of therapy since his injury. He had received extensive gait training prior to initiation of services. His goal was to recover the ability to walk...
July 2017: Journal of Neurologic Physical Therapy: JNPT
https://www.readbyqxmd.com/read/28628249/defining-a-temporal-order-of-genetic-requirements-for-development-of-mycobacterial-biofilms
#19
Yong Yang, Joseph Thomas, Yunlong Li, Catherine Vilchèze, Keith M Derbyshire, William R Jacobs, Anil K Ojha
Most mycobacterial species spontaneously form biofilms, inducing unique growth physiologies and reducing drug sensitivity. Biofilm growth progresses through three genetically programmed stages: substratum attachment, intercellular aggregation and architecture maturation. Growth of Mycobacterium smegmatis biofilms requires multiple factors including a chaperonin (GroEL1) and a nucleoid-associated protein (Lsr2), although how their activities are linked remains unclear. Here we show that Lsr2 participates in intercellular aggregation, but substratum attachment of Lsr2 mutants is unaffected, thereby genetically distinguishing these developmental stages...
June 19, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28628017/-combined-immunotherapy-of-reconditional-chronic-non-specific-vulvovaginitis-in-immunocompromised-girls
#20
I Nesterova, S Kovaleva, G Chudilova, L Lomtatidze, V Krutova, I Aslanian, A Tulendinova, V Malinovskaya
Nonspecific chronic vulvovaginitis (CNV) is often a clinical indicator of immune deficiency, especially in young girls. The established violations of the functioning of various parts of the immune system (IS) in this pathology dictate the need to include in the complex of immunomodulatory therapy. The developed program of combined immunotherapy for immunocompromised girls allows to reduce the severity and duration of exacerbation of CNV, their frequency against the background of a significant reduction in the incidence of ARVI...
May 2017: Georgian Medical News
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