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persister cell

Marcel Adler, Valérie Lapierre, Riwa Sakr, Jean-Henri Bourhis, Bertrand Gachot, Cristina Castilla-Llorente, Benjamin Wyplosz
No abstract text is available yet for this article.
March 14, 2018: Journal of Infectious Diseases
Dong-Keon Lee, Ji-Hee Kim, Joohwan Kim, Seunghwan Choi, MinSik Park, Wonjin Park, Suji Kim, Kyu-Sun Lee, Taesam Kim, Jiwon Jung, Yoon Kyung Choi, Kwon-Soo Ha, Moo-Ho Won, Timothy R Billiar, Young-Guen Kwon, Young-Myeong Kim
Regulated in development and DNA damage responses (REDD)-1, an inhibitor of mammalian target of rapamycin (mTOR), is induced by various cell stressors, including LPS, a major player in the pathogenesis of endotoxemic shock. However, the pathologic role of REDD-1 in endotoxemia is largely unknown. We found that LPS increased REDD-1 expression, nuclear transcription factor-κB (NF-κB) activation, and inflammation and that these responses were suppressed by REDD-1 knockdown and in REDD-1+/- macrophages. REDD-1 overexpression stimulated NF-κB-dependent inflammation without additional LPS stimulation...
March 16, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
Elena García-Payá, Marta Fernández, Sergio Padilla, José A García, Catalina Robledano, Victoria Ortiz DE LA Tabla, Félix Gutiérrez, Mar Masiá
OBJECTIVE: The protective effect of ART has not yet been definitively established in men who have sex with men (MSM). We aimed to characterize the factors associated with persistent HIV-1 RNA rectal shedding. METHODS: Prospective study including virologically-suppressed MSM from an HIV cohort. High-resolution anoscopy (HRA) was performed for screening of anal dysplasia, and rectal sampling for HIV-1 RNA quantification and sexually-transmitted infections (STIs) investigation through multiplex PCR...
March 15, 2018: AIDS
Maud Martin, Alexandra Veloso, Jingchao Wu, Eugene A Katrukha, Anna Akhmanova
Microtubules control different aspects of cell polarization. In cells with a radial microtubule system, a pivotal role in setting up asymmetry is attributed to the relative positioning of the centrosome and the nucleus. Here, we show that centrosome loss had no effect on the ability of endothelial cells to polarize and move in 2D and 3D environments. In contrast, non-centrosomal microtubules stabilized by the microtubule minus-end-binding protein CAMSAP2 were required for directional migration on 2D substrates and for the establishment of polarized cell morphology in soft 3D matrices...
March 16, 2018: ELife
Doaa Abdelmageed El Faham, Mohamed Amr Hussein Elnoury, Mona Ibraheim Morsy, Marwa Abdelmoneim El Shaer, Ghada Mohammed Nour Eldin, Osama Mahmoud Azmy
Low-level laser therapy (LLLT) has been used in photobiomodulation to promote healing, regenerate, and restore tissue function. Women with persistent thin endometrium were assumed to encounter diminished activity in the regenerative and functional capacity of their endometrium. The aim of this study was to examine the ability of LLLT in 635 nm wavelength to enhance the proliferation and gene expression of in vitro cultured endometrial cells. Single (SE) versus multiple exposures (ME) to LLLT were examined in the study groups and compared to controls...
March 15, 2018: Lasers in Medical Science
Jesús Emilo Quintero Ojeda, Maribel Aguilar-Medina, Vicente Olimón-Andalón, Rosa Alicia García Jau, Alfredo Ayala Ham, José Geovanni Romero Quintana, Erika de Lourdes Silva-Benítez, Guzmán Sanchez-Schmitz, Rosalío Ramos-Payán
Diabetes mellitus (DM) is a metabolic disease characterized by persistent high levels of glucose in plasma. Chronic hyperglycemia is thought to increase oxidative stress and the formation of free radicals that in turn damage cells. Thus, we decided to determine the frequency of nuclear abnormalities in epithelial cells from cheek and tongue mucosa of DM patients with type 1 (DM1, treated only with insulin) and type 2 (DM2, treated with metformin) using the buccal micronucleus cytome (BMCyt) assay. Micronuclei frequency in cheek epithelial cells was higher in both DM1 (0...
2018: BioMed Research International
Yuan-Jun Xia, Hong Xia, Ling Chen, Qing-Shui Ying, Xiang Yu, Li-Hua Li, Jian-Hua Wang, Ying Zhang
Bone morphogenetic protein-2 (BMP-2) serves an important role in the development of bone and cartilage. However, administration of BMP-2 protein alone by intravenous delivery is not very effective. Sustained delivery of stabilized BMP-2 by carriers has been proven necessary to improve the osteogenesis effect of BMP-2. The present study constructed a novel drug delivery system using dextran sulfate (DS)-chitosan (CS) microspheres and investigated the efficiency of the delivery system on recombinant human bone morphogenetic protein (rhBMP-2)...
April 2018: Experimental and Therapeutic Medicine
Anas H Abu-Humaidan, Malin Elvén, Andreas Sonesson, Peter Garred, Ole E Sørensen
The complement system is an ancient part of the innate immune system important for both tissue homeostasis and host defense. However, bacteria like Staphylococcus aureus (SA) possess elaborative mechanisms for evading both the complement system and other parts of the immune system. One of these evasive mechanisms-important in causing chronic and therapy resistant infections-is the intracellular persistence in non-immune cells. The objective of our study was to investigate whether persistent intracellular SA infection of epidermal keratinocytes resulted in complement activation...
2018: Frontiers in Immunology
Kimberly R Kalli, Matthew S Block, Pashtoon M Kasi, Courtney L Erskine, Timothy J Hobday, Allan Dietz, Douglas Padley, Michael P Gustafson, Barath Shreeder, Danell Puglisi-Knutson, Daniel W Visscher, Toni Kay Mangskau, Glynn Wilson, Keith L Knutson
PURPOSE: Folate receptor alpha (FR) is overexpressed in several cancers. Endogenous immunity to the FR has been demonstrated in patients and suggests the feasibility of targeting FR with vaccine or other immune therapies. CD4 helper T cells are central to the development of coordinated immunity and prior work shows their importance in protecting against relapse. Our previous identification of degenerate HLA-class II epitopes from human FR led to the development of a broad coverage epitope pool potentially useful in augmenting antigen-specific immune responses in most patients...
March 15, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Maria Krevvata, Xiaochuan Shan, Chenghui Zhou, Cedric Dos Santos, Georges Habineza Ndikuyeze, Anthony Secreto, Joshua Glover, Winifred Trotman, Gisela Brake-Silla, Selene Nunez-Cruz, Gerald Wertheim, Hyun-Jeong Ra, Elizabeth Griffiths, Charalampos Papachristou, Gwenn Danet-Desnoyers, Martin Carroll
Patient-derived xenotransplantation models of human myeloid diseases including acute myeloid leukemia, myelodysplastic syndromes and myeloproliferative neoplasms are essential for studying the disease's biology in pre-clinical studies. However, few studies have used these models for comparison purposes. Previous work has shown that acute myeloid leukemia blasts respond to human hematopoietic cytokines whereas myelodysplastic syndrome cells do not. We compared the engraftment of acute myeloid leukemia cells and myelodyplastic syndrome cells in NSG mice to NSG-S mice, which have transgene expression of human cytokines...
March 15, 2018: Haematologica
Gimano D Amatngalim, Jasmijn A Schrumpf, Fernanda Dishchekenian, Tinne C J Mertens, Dennis K Ninaber, Abraham C van der Linden, Charles Pilette, Christian Taube, Pieter S Hiemstra, Anne M van der Does
Research question : It is currently unknown how cigarette smoke-induced airway remodelling affects highly expressed respiratory epithelial defence proteins and thereby mucosal host defence. Methods: Localization of a selected set of highly expressed respiratory epithelial host defence proteins was assessed in well-differentiated primary bronchial epithelial cell (PBEC) cultures. Next, PBEC were cultured at the air-liquid interface and during differentiation for 2-3 weeks daily exposed to whole cigarette smoke...
March 15, 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Derick Okwan-Duodu, Laura Hansen, Giji Joseph, Alicia N Lyle, Daiana Weiss, David R Archer, W Robert Taylor
OBJECTIVE: The adaptive response to vascular injury is the formation of functional collateral vessels to maintain organ integrity. Many of the clinical complications associated with sickle cell disease can be attributed to repeated bouts of vascular insufficiency, yet the detailed mechanisms of collateral vessel formation after injury are largely unknown in sickle cell disease. Here, we characterize postischemic neovascularization in sickle cell disease and the role of neutrophils in the production of reactive oxygen species...
March 15, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
Morgan L Shannon, Ryann M Fame, Kevin F Chau, Neil Dani, Monica L Calicchio, Gwenaelle S Géléoc, Hart G W Lidov, Sanda Alexandrescu, Maria K Lehtinen
Choroid plexus tumors and ciliary body medulloepithelioma are predominantly pediatric neoplasms. Progress in understanding the pathogenesis of these tumors has been hindered by their rarity and lack of models that faithfully recapitulate the disease. Here, we find that endogenous c-Myc is down-regulated in the forebrain neuroepithelium, whose neural plate border domains give rise to anterior choroid plexus and ciliary body. To uncover the consequences of persistent MYC (c-Myc) expression, c-Myc expression was forced in multipotent neural precursors (Nestin-Cre:MYC), which produced a fully penetrant model of choroid plexus carcinoma and ciliary body medulloepithelioma...
March 12, 2018: American Journal of Pathology
A Sionis, R Suades, J Sans-Roselló, M Sánchez-Martínez, J Crespo, T Padró, J Cubedo, A Ferrero-Gregori, M Vila-Perales, A Duran-Cambra, L Badimon
BACKGROUND: Cardiogenic shock (CS) is the leading cause of death in patients admitted for acute myocardial infarction (MI). Despite the recent advances in reperfusion and medical treatment mortality remains unacceptably high. Whether cells of the blood compartment in CS-patients are activated and release microparticles (cMPs) that may be both messengers and biomarkers of cell damage is not known. We aimed to investigate the cMP subtypes and parental activated cells of ST-elevation MI (STEMI)-patients complicated by CS and that of non-CS STEMI-patients (non-CS) in order to identify a cMP signature that could aid CS patient's risk stratification...
May 1, 2018: International Journal of Cardiology
Xiaowen Wang, Qingyang Dong, Qian Li, Yuanyuan Li, Dianyuan Zhao, Jinjie Sun, Junliang Fu, Fanping Meng, Hu Lin, Junjie Luan, Biao Liu, Min Wang, Fusheng Wang, Fuchu He, Li Tang
BACKGROUND & AIMS: Production of neutralizing antibodies against hepatitis B surface antigen (HBsAg) is dysregulated in patients with persistent hepatitis V virus (HBV) infection. We investigated mechanisms by which this immune response to the virus is disrupted and whether it can be restored to promote clearance of HBV. METHODS: Immune-competent C57BL/6N and C57BL/6J, as well as mice deficient in follicular helper T cells (Tfh cell-deficient), B cells, or Foxp3+ T-regulatory cells (Treg cell-deficient), were given hydrodynamic injections of pAAV/HBV1...
March 12, 2018: Gastroenterology
Yung-Che Chen, Meng-Chih Lin, Chih-Hung Lee, Shih-Feng Liu, Chin-Chou Wang, Wen-Feng Fang, Tung-Ying Chao, Chao-Chien Wu, Yu-Feng Wei, Huang-Chih Chang, Chia-Cheng Tsen, Hung-Chen Chen
BACKGROUND: Controversy exists in previous studies on macrophage M1/M2 polarization in chronic obstructive pulmonary disease (COPD). We hypothesized that formyl peptide receptor (FPR), a marker of efferocytosis and mediator of M1/M2 polarization, may be involved in the development of COPD. METHODS: We examined FPR 1/2/3 expressions of blood M1/M2a monocyte, neutrophil, natural killer (NK) cell, NK T cell, T helper (Th) cell, and T cytotoxic (Tc) cell by flowcytometry method in 40 patients with cigarette smoking-related COPD and 16 healthy non-smokers...
March 15, 2018: Journal of Translational Medicine
Rose Nabatanzi, Stephen Cose, Moses Joloba, Sarah Rowland Jones, Damalie Nakanjako
HIV infection causes upregulation of markers of inflammation, immune activation and apoptosis of host adaptive, and innate immune cells particularly monocytes, natural killer (NK) and innate lymphoid cells (ILCs). Although antiretroviral therapy (ART) restores CD4 T-cell counts, the persistent aberrant activation of monocytes, NK and ILCs observed likely contributes to the incomplete recovery of T-cell effector functions. A better understanding of the effects of HIV infection and ART on the phenotype and function of circulating monocytes, NK, and ILCs is required to guide development of novel therapeutic interventions to optimize immune recovery...
March 15, 2018: AIDS Research and Therapy
Eun-Ji Choi, Je-Hwan Lee, Jung-Hee Lee, Han-Seung Park, Sun-Hye Ko, Eun-Hye Hur, Juhyun Moon, Bon-Kwan Goo, Yeonhee Kim, Miee Seol, Young-Shin Lee, Young-Ah Kang, Mijin Jeon, Ji Min Woo, Kyoo-Hyung Lee
This retrospective analysis compared anthracyclines (as part of an induction regimen) in 128 newly diagnosed FLT3-ITD-mutated AML patients. Induction regimens comprised high-dose daunorubicin (HD-DN; 90 mg/m2 /d × 3d; n = 44), standard-dose daunorubicin (SD-DN; 45 mg/m2 /d × 3d; n = 51), or idarubicin (IDA; 12 mg/m2 /d × 3d; n = 33) in combination with cytarabine (100-200 mg/m2 /d × 7d). Fifty-three patients showing persistent leukemia on interim bone marrow examination received a second course of induction chemotherapy comprising 2 days of daunorubicin (45 mg/m2 /d) or IDA (8 or 12 mg/m2 /d) in addition to 5 days of cytarabine...
March 8, 2018: Leukemia Research
Laura Masala, Federica Ariu, Luisa Bogliolo, Emanuela Bellu, Sergio Ledda, Daniela Bebbere
Oocytes from prepubertal animals have a reduced ability to undergo embryo development and produce viable offspring. The present work used an ovine model consisting of oocytes derived from adult and prepubertal donors to assess the molecular status of oocytes and preimplantation embryos with different developmental competence. The lower potential of oocytes of young donors was confirmed in terms of in vitro developmental capabilities and kinetics. A panel of genes including maternal effect (DPPA3, GDF9, NMP2, ZAR1) and housekeeping genes (ACTB, RPL19, SDHA, YWHAZ, ATP1A1), genes involved in DNA methylation (DNMT1, DNMT3A, DNMT3B), genomic imprinting (IGF2R), pluripotency (NANOG, POU5F1) and cell cycle regulation (CCNB1, CDK1, MELK) was relatively quantified...
March 15, 2018: Molecular Reproduction and Development
Eliott Teston, Thomas Maldiney, Iris Marangon, Jeanne Volatron, Yoann Lalatonne, Laurence Motte, Catherine Boisson-Vidal, Gwennhael Autret, Olivier Clément, Daniel Scherman, Florence Gazeau, Cyrille Richard
Once injected into a living organism, cells diffuse or migrate around the initial injection point and become impossible to be visualized and tracked in vivo. The present work concerns the development of a new technique for therapeutic cell labeling and subsequent in vivo visualization and magnetic retention. It is hypothesized and subsequently demonstrated that nanohybrids made of persistent luminescence nanoparticles and ultrasmall superparamagnetic iron oxide nanoparticles incorporated into a silica matrix can be used as an effective nanoplatform to label therapeutic cells in a nontoxic way in order to dynamically track them in real-time in vitro and in living mice...
March 15, 2018: Small
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