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https://www.readbyqxmd.com/read/28748017/-factors-associated-with-immunovirologic-dissociation-in-hiv-1-infected-patients-under-highly-active-antiretroviral-therapy-in-the-ambulatory-treatment-center-atc-in-dakar
#1
Daye Kà, Noël Magloire Manga, Ndéye Fatou Ngom-Guéye, Diop Ndiaga, Moustapha Diop, Viviane Marie Pierre Cisse-Diallo, Khardiata Diallo-Mbaye, Ndèye Aissatou Lakhe, Louise Fortès-Déguenonvo, Cheikh Tidiane Ndour, Sylvie Audrey Diop-Nyafouna, Moussa Seydi
INTRODUCTION: The objective of this work is to evaluate the different factors associated with immunovirologic dissociation despite highly active and effective antiretroviral treatment. METHODS: We conducted a retrospective, cohort, descriptive and analytical study of the medical records of HIV-1 infected patients having received at least 12 months of antiretroviral therapy, followed in the ATC cohort from 2001 to 2011 and with undetectable viral load in the last 6 months...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28744842/the-quantitative-structural-and-compositional-analyses-of-degenerating-intervertebral-discs-using-magnetic-resonance-imaging-and-contrast-enhanced-micro-computed-tomography
#2
Kevin H Lin, Simon Y Tang
The intervertebral disc (IVD) is susceptible to degenerative changes that are associated with low back pain. Murine models are often used to investigate the mechanistic changes in the development, aging, and diseased states of the IVD, yet the detection of early degenerative changes in structure is challenging because of the minute size of the murine IVDs. Histology is the gold standard for examining the IVD structure, but it is susceptible to sectioning artifacts, spatial biases, and requires the destructive preparation of the sample...
July 25, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28739045/filamin-b-the-next-hotspot-in-skeletal-research
#3
REVIEW
Qiming Xu, Nan Wu, Lijia Cui, Zhihong Wu, Guixing Qiu
Filamin B (FLNB) is a large dimeric actin-binding protein which crosslinks actin cytoskeleton filaments into a dynamic structure. Up to present, pathogenic mutations in FLNB are solely found to cause skeletal deformities, indicating the important role of FLNB in skeletal development. FLNB-related disorders are classified as spondylocarpotarsal synostosis (SCT), Larsen syndrome (LS), atelosteogenesis (AO), boomerang dysplasia (BD), and isolated congenital talipes equinovarus, presenting with scoliosis, short-limbed dwarfism, clubfoot, joint dislocation and other unique skeletal abnormalities...
July 6, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
https://www.readbyqxmd.com/read/28728306/-interpretation-of-guidance-for-establishing-the-performance-characteristics-of-in-vitro-diagnostic-devices-for-the-detection-or-detection-and-differentiation-of-high-risk-human-papillomaviruses-issued-by-food-and-drug-administration-of-united-states-and-china
#4
R M Feng, W Chen, Y L Qiao
To establish the standardization of clinical verification designs for in vitro diagnostic devices(IVDs) of human papillomavirus, China Food and Drug Administration (CFDA) and United States Food and Drug Administration (FDA) issued guidelines of detailed study designs and effectiveness evaluation for accuracy validation and clinical performance of nucleic acid detection, respectively, including triage of a typical squamous cells of undetermined significance(ASC-US) patients and validation of combined screening and preliminary screening...
July 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28719551/annulus-fibrosus-repair-using-high-density-collagen-gel-an-in-vivo-ovine-model
#5
Brenton Pennicooke, Ibrahim Hussain, Connor Berlin, Stephen R Sloan, Brandon Borde, Yu Moriguchi, Gernot Lang, Rodrigo Navarro-Ramirez, Jonathan Cheetham, Lawrence J Bonassar, Roger Härtl
STUDY DESIGN: Ovine in vivo study. OBJECTIVE: To perform lateral approach lumbar surgery in an ovine model to administer an injectable riboflavin (RF) cross-linked high-density collagen (HDC) gel and to assess its ability to mitigate intervertebral disc (IVD) degeneration after induced annulus fibrosus (AF) injury. SUMMARY OF BACKGROUND DATA: Biological-based injectable gels have shown efficacy in restoring biomechanical, radiographic, and histological parameters in IVD-injured animal models...
July 17, 2017: Spine
https://www.readbyqxmd.com/read/28715273/physiological-effects-of-physical-therapy-interventions-on-lumbar-intervertebral-discs-a-systematic-review
#6
Ulrike H Mitchell, Kevin Helgeson, Paul Mintken
BACKGROUND CONTEXT: The use of physical therapy has been recommended in the treatment of low back pain based on primarily mechanical and neurophysiological effects. Recent studies have measured the physiological effects of physical therapy interventions, including manual therapy and traction, on the intervertebral discs (IVD), and these findings may have implications for the long-term management or even prevention of low back pain. PURPOSE: The objective of this systematic review is to investigate the literature regarding possible physiological effects of physical therapy interventions on the intervertebral disc (IVD)...
July 17, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28709868/protective-effect-of-p53-on-the-viability-of-intervertebral-disc-nucleus-pulposus-cells-under-low-glucose-condition
#7
Xifeng Xiong, Libing Dai, Weiguo Liang, Jinli Zhang, Shengnan Qin, Wenjuan Cao, Dongping Ye, Peihong Liang, Zhihe Liu
P53 is a famous cancer suppressor and plays key roles in metabolism. Intervertebral disc (IVD) is the largest avascular cartilaginous structure in humans and its degeneration is a common cause of spine diseases initiated from damaged nucleus pulposus (NP) cells. The potential cause of disc degeneration has been attributed to aging, genetic factors, mechanical factors and nutrition. In this study, we found that p53 decreased and leaked to the cytoplasm in NP cells as the glucose level decreases, in contrast to cancer cells in which p53 increases and concentrates to the nuclei...
July 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28687634/laboratory-developed-tests-a-legislative-and-regulatory-review
#8
REVIEW
Jonathan R Genzen, Jeffrey S Mohlman, Jerry L Lynch, Michael W Squires, Ronald L Weiss
BACKGROUND: Twenty-five years ago, the Food and Drug Administration (FDA) asserted in a draft document that "home brew" tests-now commonly referred to as laboratory-developed tests (LDTs)-are subject to the same regulatory oversight as other in vitro diagnostics (IVDs)(4). In 2010, the FDA began work on developing a proposed framework for future LDT oversight. Released in 2014, the draft guidance sparked an intense debate over potential LDT regulation. While the proposed guidance has not been implemented, many questions regarding LDT oversight remain unresolved...
July 7, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28686553/candidaemia-in-a-tertiary-care-academic-hospital-in-italy-the-impact-of-c-parapsilosis-complex-on-the-species-distribution-and-antifungal-susceptibility
#9
Maria Cristina Ghezzi, Grazia Brunetti, Valeria Visconti, Alessandra Giordano, Giammarco Raponi
PURPOSE: To analyse the species distribution and the susceptibility profiles to the major antifungal agents of Candida isolated from bloodstream infections (BSIs) in both intensive care units (ICUs) and non-ICU wards in a tertiary care hospital in Italy from 2010 until 2015. METHODOLOGY: Episodes of Candida BSI were recorded in a retrospective observational cohort study. Yeasts were isolated from both blood and intravascuIar devices (IVDs) and their susceptibility to antifungal drugs was tested using the microdilution method...
July 8, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28679056/self-healing-dynamic-hydrogel-as-injectable-shock-absorbing-artificial-nucleus-pulposus
#10
Adrián Pérez-San Vicente, Marianna Peroglio, Manuela Ernst, Pablo Casuso, Iraida Loinaz, Hans-Jürgen Grande, Mauro Alini, David Eglin, Damien Dupin
The intervertebral discs (IVDs) provide unique flexibility to the spine and exceptional shock absorbing properties under impact. The inner core of the IVD, the nucleus pulposus (NP) is responsible for this adaptive behavior. Herein, we evaluate an injectable, self-healing dynamic hydrogel (DH) based on gold(I)-thiolate/disulfide (Au-S/SS) exchange as NP replacement in a spine motion segment model. For the first time, we report the application of dynamic covalent hydrogels inside biological tissues. The dynamic exchange between Au-S species and disulfide bonds (SS) resulted in self-healing ability and frequency-dependent stiffness of the hydrogel, which was also confirmed in spine motion segments...
July 19, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28678109/age-correlated-phenotypic-alterations-in-cells-isolated-from-human-degenerated-intervertebral-discs-with-contained-hernias
#11
Maria Molinos, Carla Cunha, Catarina R Almeida, Raquel M Gonçalves, Paulo Pereira, Pedro Santos Silva, Rui Vaz, Mário A Barbosa
STUDY DESIGN: Human intervertebral disc (hIVD) cells were isolated from 41 surgically excised samples and assessed for their phenotypic alterations with age. OBJECTIVE: Towards the design of novel anti-ageing strategies to overcome degenerative disc disease (DDD), we investigated age-correlated phenotypic alterations that occur on primary hIVD cells. SUMMARY OF BACKGROUND DATA: Although regenerative medicine holds great hope, much is still to be unveiled on IVD cell biology and its intrinsic signalling pathways, which can lead the way to successful therapies for IDD...
July 3, 2017: Spine
https://www.readbyqxmd.com/read/28677762/general-regulatory-effects-of-hypoxia-on-human-cartilage-endplate%C3%A2-derived-stem-cells-a-genome%C3%A2-wide-analysis-of-differential-gene-expression-and-alternative-splicing-events
#12
Yuan Yao, Weilin Song, Qiyue Deng, Huiyu Zhang, Jian Wang, Huan Liu, Yue Zhou
Intervertebral disc (IVD) degeneration of is considered to be initiated by the degeneration of the cartilage endplate (CEP). CEP‑derived stem cells (CESCs) with the capacity for osteochondrogenic differentiation may be responsible for CEP cartilage restoration. As CEP is avascular and hypoxic, and hypoxia can greatly influence biological activities of stem cells, physiological hypoxia may serve important roles in regulating the physiological functions of CESCs. The aim of the present study was to investigate the mechanisms of hypoxia‑regulated CESCs fate by using the Human Transcriptome Array 2...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28676344/crispr-epigenome-editing-of-akap150-in-drg-neurons-abolishes-degenerative-ivd-induced-neuronal-activation
#13
Joshua D Stover, Niloofar Farhang, Kristofer C Berrett, Jason Gertz, Brandon Lawrence, Robby D Bowles
Back pain is a major contributor to disability and has significant socioeconomic impacts worldwide. The degenerative intervertebral disc (IVD) has been hypothesized to contribute to back pain, but a better understanding of the interactions between the degenerative IVD and nociceptive neurons innervating the disc and treatment strategies that directly target these interactions is needed to improve our understanding and treatment of back pain. We investigated degenerative IVD-induced changes to dorsal root ganglion (DRG) neuron activity and utilized CRISPR epigenome editing as a neuromodulation strategy...
July 1, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28674787/the-transpedicular-surgical-approach-for-the-development-of-intervertebral-disc-targeting-regenerative-strategies-in-an-ovine-model
#14
Luc Le Fournier, Marion Fusellier, Boris Halgand, Julie Lesoeur, Olivier Gauthier, Philippe Menei, Claudia Montero-Menei, Jérôme Guicheux, Johann Clouet
PURPOSE: To investigate the suitability of the transpedicular approach (TPA) in a sheep model of IVD regenerative strategies METHODS: 24 IVD from four sheep were used. TPA and biopsies of the Nucleus pulposus (NP) were performed in 18 IVD (6 IVD control). Seven discographies were performed to assess the feasibility of injecting contrast agent. MRI, micro-CT scan, and histological analyses were performed and the accuracy of the TPA was evaluated. The effects on the vertebra and endplates were analyzed...
July 3, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28670416/correlation-among-inflammatory-cytokine-expression-levels-degree-of-disk-degeneration-and-predominant-clinical-symptoms-in-patients-with-degenerated-intervertebral-discs
#15
Takeshi Sainoh, Kazuhide Inage, Sumihisa Orita, Masao Koda, Takeo Furuya, Kazuyo Yamauchi, Miyako Suzuki, Yoshihiro Sakuma, Go Kubota, Yasuhiro Oikawa, Jun Sato, Kazuki Fujimoto, Yasuhiro Shiga, Koki Abe, Hirohito Kanamoto, Masahiro Inoue, Hideyuki Kinoshita, Masaki Norimoto, Tomotaka Umimura, Kazuhisa Takahashi, Seiji Ohtori
STUDY DESIGN: Observational study. PURPOSE: To assess the correlation among inflammatory cytokine expression levels, degree of intervertebral disk (IVD) degeneration, and predominant clinical symptoms observed in degenerative disk disease (DDD). OVERVIEW OF LITERATURE: Low back pain (LBP) is associated with inflammatory cytokine expression levels, including those of tumor necrosis factor-alpha (TNF-α), interleukin 6 (IL-6), and nerve growth factor (NGF)...
June 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28670402/disc-rehydration-after-dynamic-stabilization-a-report-of-59-cases
#16
Atilla Yilmaz, Salim Senturk, Mehdi Sasani, Tunc Oktenoglu, Onur Yaman, Hakan Yildirim, Tuncer Suzer, Ali Fahir Ozer
STUDY DESIGN: A retrospective study investigating decrease in the nucleus pulposus signal intensity or disc height on magnetic resonance imaging (MRI) and disc degeneration. PURPOSE: Although a degenerated disc cannot self-regenerate, distraction or stabilization may provide suitable conditions for rehydration and possible regeneration. This study aimed to evaluate clinical outcomes and disc regeneration via MRI in a series of patients with degenerative disc disease (DDD) who underwent lumbar stabilization with a dynamic stabilization system (DSS)...
June 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28669799/comparison-of-dna-extraction-methods-used-to-detect-bacterial-and-yeast-dna-from-spiked-whole-blood-by-real-time-pcr
#17
Libera M Dalla-Costa, Luis G Morello, Danieli Conte, Luciane A Pereira, Jussara K Palmeiro, Altair Ambrosio, Dayane Cardozo, Marco A Krieger, Sonia M Raboni
Sepsis is the leading cause of death in intensive care units (ICUs) worldwide and its diagnosis remains a challenge. Blood culturing is the gold standard technique for blood stream infection (BSI) identification. Molecular tests to detect pathogens in whole blood enable early use of antimicrobials and affect clinical outcomes. Here, using real-time PCR, we evaluated DNA extraction using seven manual and three automated commercially available systems with whole blood samples artificially contaminated with Escherichia coli, Staphylococcus aureus, and Candida albicans, microorganisms commonly associated with BSI...
June 29, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28669721/initial-investigation-of-individual-and-combined-annulus-fibrosus-and-nucleus-pulposus-repair-ex-vivo
#18
Stephen R Sloan, Devis Galesso, Cynthia Secchieri, Connor Berlin, Roger Hartl, Lawrence J Bonassar
Novel tissue engineered and biomaterial approaches to treat intervertebral disc (IVD) degeneration focus on single aspects of the progressive disease and hence are insufficient repair strategies. In this study, annulus fibrosus (AF) and nucleus pulposus (NP) biomaterial repair strategies were used individually and combined to treat IVD degeneration modeled in ex vivo rat-tail motion segments by annulotomy and nucleotomy. An injectable riboflavin cross-linked high-density collagen gel patched defects in the AF, while NP repair consisted of injections of a modified hyaluronic acid (HA) hydrogel...
June 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28665183/one-stage-positron-emission-tomography-and-magnetic-resonance-imaging-to-assess-mesenchymal-stem-cell-survival-in-a-canine-model-of-intervertebral-disc-degeneration
#19
Donghua Hang, Fan Li, Wenjun Che, Xiaofeng Wu, Yao Wan, Jiandong Wang, Yanping Zheng
Intervertebral disc (IVD) degeneration is a major health problem. Although mesenchymal stem cells (MSCs) have been used to promote IVD regeneration, the actual survival time of implanted MSCs in IVDs has never been studied non-invasively and continuously in vivo. To investigate survival of implanted MSCs in vivo, this study used a canine model of degenerated IVD and MSCs transfected with a mutant herpes simplex type-1 virus thymidine kinase (HSV1-sr39tk) and labelled with magnetic iron oxide nanoparticles (MION)...
June 30, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28647468/influence-of-rabbit-notochordal-cells-on-symptomatic-intervertebral-disc-degeneration-anti-angiogenic-capacity-on-human-endothelial-cell-proliferation-under-hypoxia
#20
W-K Kwon, H J Moon, T-H Kwon, Y-K Park, J H Kim
OBJECTIVES: Symptomatic degenerative disc disease (DDD) is associated with neovascularization and nerve ingrowth into intervertebral discs (IVDs). Notochordal cells (NCs) are key cells that may lead to regeneration of IVDs. However, their activities under conditions of hypoxia, the real environment of IVD, are not well known. We hypothesized that NCs may inhibit neovascularization by interacting with endothelial cells (ECs) under hypoxia. DESIGN: Human IVDs were isolated and cultured to produce nucleus pulposus (NP) cell conditioned medium (NPCM)...
June 21, 2017: Osteoarthritis and Cartilage
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