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https://www.readbyqxmd.com/read/28894084/tbx3-dependent-amplifying-stem-cell-progeny-drives-interfollicular-epidermal-expansion-during-pregnancy-and-regeneration
#1
Ryo Ichijo, Hiroki Kobayashi, Saori Yoneda, Yui Iizuka, Hirokazu Kubo, Shigeru Matsumura, Satsuki Kitano, Hitoshi Miyachi, Tetsuya Honda, Fumiko Toyoshima
The skin surface area varies flexibly in response to body shape changes. Skin homeostasis is maintained by stem cells residing in the basal layer of the interfollicular epidermis. However, how the interfollicular epidermal stem cells response to physiological body shape changes remains elusive. Here, we identify a highly proliferative interfollicular epidermal basal cell population in the rapidly expanding abdominal skin of pregnant mice. These cells express Tbx3 that is necessary for their propagation to drive skin expansion...
September 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/28878766/chronic-exposure-to-malaria-is-associated-with-inhibitory-and-activation-markers-on-atypical-memory-b-cells-and-marginal-zone-like-b-cells
#2
Itziar Ubillos, Joseph J Campo, Pilar Requena, Maria Ome-Kaius, Sarah Hanieh, Honor Rose, Paula Samol, Diana Barrios, Alfons Jiménez, Azucena Bardají, Ivo Mueller, Clara Menéndez, Stephen Rogerson, Gemma Moncunill, Carlota Dobaño
In persistent infections that are accompanied by chronic immune activation, such as human immunodeficiency virus, hepatitis C virus, and malaria, there is an increased frequency of a phenotypically distinct subset of memory B cells lacking the classic memory marker CD27 and showing a reduced capacity to produce antibodies. However, critical knowledge gaps remain on specific B cell changes and immune adaptation in chronic infections. We hypothesized that expansion of atypical memory B cells (aMBCs) and reduction of activated peripheral marginal zone (MZ)-like B cells in constantly exposed individuals might be accompanied by phenotypic changes that would confer a tolerogenic profile, helping to establish tolerance to infections...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28855657/plasmodium-vivax-ligand-receptor-interaction-pvama-1-domain-i-contains-the-minimal-regions-for-specific-interaction-with-cd71-reticulocytes
#3
Gabriela Arévalo-Pinzón, Maritza Bermúdez, Diana Hernández, Hernando Curtidor, Manuel Alfonso Patarroyo
The malarial parasite's invasion is complex, active and coordinated, involving many low and high affinity interactions with receptors on target cell membrane. Proteomics analysis has described around 40 proteins in P. vivax which could be involved in reticulocyte invasion; few have been studied with the aim of elucidating how many of them establish specific interactions with their respective host cells. Given the importance of knowing which of the parasite's protein regions are functionally important for invasion, minimum regions mediating specific interaction between Plasmodium vivax apical membrane antigen 1 (PvAMA-1) and its host cell were here elucidated...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28845406/in-vitro-hb-production-in-b-thalassemia-patients-is-not-a-predictor-of-clinical-responsiveness-to-hydroxyurea
#4
Mohammad Reza Mahdavi, Farzin Pourfarzad, Mehrnoush Kosaryan, Mohammad Taghi Akbari
BACKGROUND: The hematologic response to hydroxyurea (HU) is varied among β-thalassemia (BT) patients. The BCL11A and SOX6 genes are involved in response to HU. This study aimed to investigate the in-vitro responsiveness of HU among BT major patients homozygote for IVSII-1G>A mutation and XmnI single nucleotide polymorphism (SNP) in order to find whether the in-vitro Hb concentration is a predictor of clinical (HU) responsiveness. METHODS: In this case-control study, twenty BT patients homozygote for IVSII-1G>A mutation and XmnI SNP from Thalassemia Research Center, Sari, Iran in 2015 were selected and categorized into two groups of 10 Responder (R) and 10 Non-Responder (NR) according to their clinical HU response...
July 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/28829585/mass-spectrometry-method-to-measure-membrane-proteins-in-dried-blood-spots-for-the-detection-of-blood-doping-practices-in-sport
#5
Holly D Cox, Daniel Eichner
The dried blood spot (DBS) matrix has significant utility for applications in the field where venous blood collection and timely shipment of labile blood samples is difficult. Unfortunately, protein measurement in DBS is hindered by high abundance proteins and matrix interference that increases with hematocrit. We developed a DBS method to enrich for membrane proteins and remove soluble proteins and matrix interference. Following a wash in a series of buffers, the membrane proteins are digested with trypsin and quantitated by parallel reaction monitoring mass spectrometry methods...
August 31, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28822917/coexistence-of-aberrant-hematopoietic-and-stromal-elements-in-myelodysplastic-syndromes
#6
Salar Abbas, Archana Kini, Vivi M Srivastava, Marie Therese M, Sukesh C Nair, Aby Abraham, Vikram Mathews, Biju George, Sanjay Kumar, Aparna Venkatraman, Alok Srivastava
Myelodysplastic syndromes (MDS) are a group of clonal hematopoietic disorders related to hematopoietic stem and progenitor cell dysfunction. Several studies have shown the role of the bone marrow microenvironment in regulating hematopoietic stem, and progenitor function and their individual abnormalities have been associated with disease pathogenesis. In this study, we simultaneously evaluated hematopoietic stem cells (HSC), hematopoietic stem progenitor cells (HSPCs) and different stromal elements in a cohort of patients with MDS-refractory cytopenia with multilineage dysplasia (RCMD)...
August 9, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28798335/cd71-erythroid-suppressor-cells-impair-adaptive-immunity-against-bordetella-pertussis
#7
Afshin Namdar, Petya Koleva, Shima Shahbaz, Stacy Strom, Volker Gerdts, Shokrollah Elahi
Infant's immune system cannot control infection or respond to vaccination as efficiently as older individuals, a phenomenon that has been attributed to immunological immaturity. Recently, we challenged this notion and proposed the presence of actively immunosuppressive and physiologically enriched CD71(+) erythroid cells in neonates. Here we utilized Bordetella pertussis, a common neonatal respiratory tract pathogen, as a proof of concept to investigate the role of these cells in adaptive immunity. We observed that CD71(+) cells have distinctive immunosuppressive properties and prevent recruitment of immune cells to the mucosal site of infection...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28777854/-a-novel-double-heterozygote-of-hbb-c-219t-a-220g-t-gene-diagnosis-and-pedigree-analysis
#8
Jiezhong Lv, Zhaofan Luo, Jianpei Fang, Tao Du, Hongman Xue, Yong Liu, Jianping Zhang
OBJECTIVE: To identify a novel hemoglobinopathy applied by direct sequencing and clone sequencing. METHODS: EDTA anticoagulated blood of proband and his parents were analyzed by hematology analyzers and Capillarys hemoglobin electrophoresis (CE). Then thalassemia genetypes were screened by gap-PCR and reverse dot blot (RDB). Proband was suspected with abnormal hemoglobin combine alpha beta compound thalassemia. The mutation of beta-globin was identified by direct sequencing and clone sequencing...
August 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28756980/pkc-%C3%AE-attenuates-the-cancer-stem-cell-among-squamous-cell-carcinoma-cells-through-down-regulating-p63
#9
Dongmei Zhang, Mingjing Fu, Lingyan Li, Huan Ye, Zhiqi Song, Yongjun Piao
Protein kinase C delta (PKC-δ) has been identified as a tumor suppressor. However, the effects of PKC-δ on the cancer stem cells in squamous cell carcinomas (SCC) have not been clarified. The purpose of this study was to detect the regulation of PKC-δ on cancer stem cell among SSC cells and the role of p63 during the regulation. Immunohistochemistry of human cutaneous SCC tissues was performed to detect the expression of PKC-δ. After the human SCC13 cells infected by recombinant adenoviruses, the cell proliferation were determined...
July 14, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28754683/darc-extracellular-domain-remodeling-in-maturating-reticulocytes-explains-plasmodium-vivax-tropism
#10
Elina Ovchynnikova, Francesca Aglialoro, Arthur E H Bentlage, Gestur Vidarsson, Nichole D Salinas, Marieke von Lindern, Niraj H Tolia, Emile van den Akker
Plasmodium vivax (Pvivax) is the most prevalent parasite species that causes malaria in humans, and exclusively infects reticulocytes. Reticulocyte infection is facilitated by Pvivax Duffy Binding Protein (DBP), which utilizes DARC (Duffy Antigen Receptor for Chemokines) as an entry point. However, the selective tropism of Pvivax for Transferrin Receptor (CD71)-positive reticulocytes remained unexplained, given the constitutive expression of DARC during reticulocyte maturation. CD71/RNA double staining of reticulocytes enriched from adult peripheral blood reveals four distinct reticulocyte populations: CD71(high)/RNA(high) (~0...
July 28, 2017: Blood
https://www.readbyqxmd.com/read/28750925/%C3%AE-1-4-galactosyltransferase-1-is-a-novel-receptor-for-iga-in-human-mesangial-cells
#11
Karen Molyneux, David Wimbury, Izabella Pawluczyk, Masahiro Muto, Jasraj Bhachu, Peter R Mertens, John Feehally, Jonathan Barratt
IgA nephropathy is characterized by mesangial deposition of IgA, mesangial cell proliferation, and extracellular matrix production. Mesangial cells bind IgA, but the identity of all potential receptors involved remains incomplete. The transferrin receptor (CD71) acts as a mesangial cell IgA receptor and its expression is upregulated in many forms of glomerulonephritis, including IgA nephropathy. CD71 is not expressed in healthy glomeruli and blocking CD71 does not completely abrogate mesangial cell IgA binding...
July 24, 2017: Kidney International
https://www.readbyqxmd.com/read/28732145/evaluation-of-primary-mediastinal-large-b-cell-lymphoma-by-flow-cytometry
#12
Sindhu Cherian, Jonathan R Fromm
BACKGROUND: Primary mediastinal large B cell lymphoma (PMLBCL) is a B cell non-Hodgkin lymphoma (B-NHL) that shows morphologic, immunophenotypic, and genetic similarities to classical Hodgkin lymphoma (CHL). We evaluated the neoplastic and reactive infiltrate of PMLBCL by flow cytometry (FC). METHODS: A total of 24 cases of PMLBCL were retrospectively characterized using FC combinations for B-NHL, T-NHL, and CHL. RESULTS: The CHL assay identified the neoplastic population (NP) in all cases, while the B-NHL assay identified the NP in 18 of 24 cases...
July 21, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28724935/histone-deacetylase-3-is-required-for-inkt-cell-development
#13
Puspa Thapa, Sinibaldo Romero Arocha, Ji Young Chung, Derek B Sant'Angelo, Virginia Smith Shapiro
NKT cells are a distinct subset that have developmental requirements that often differ from conventional T cells. Here, we show that NKT-specific deletion of Hdac3 results in a severe reduction in the number of iNKT cells, particularly of NKT1 cells. In addition, there is decreased cytokine production by Hdac3-deficient NKT2 and NKT17 cells. Hdac3-deficient iNKT cells have increased cell death that is not rescued by transgenic expression of Bcl-2 or Bcl-xL. Hdac3-deficient iNKT cells have less Cyto-ID staining and lower LC3A/B expression, indicative of reduced autophagy...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716301/discrete-%C3%AE-adrenergic-mechanisms-regulate-early-and-late-erythropoiesis-in-erythropoietin-resistant-anemia
#14
Shirin Hasan, Michael J Mosier, Andrea Szilagyi, Richard L Gamelli, Kuzhali Muthumalaiappan
BACKGROUND: Anemia of critical illness is resistant to exogenous erythropoietin. Packed red blood cells transfusions is the only treatment option, and despite related cost and morbidity, there is a need for alternate strategies. Erythrocyte development can be divided into erythropoietin-dependent and erythropoietin-independent stages. We have shown previously that erythropoietin-dependent development is intact in burn patients and the erythropoietin-independent early commitment stage, which is regulated by β1/β2-adrenergic mechanisms, is compromised...
July 14, 2017: Surgery
https://www.readbyqxmd.com/read/28701754/clostridium-perfringens-%C3%AE-toxin-impairs-erythropoiesis-by-inhibition-of-erythroid-differentiation
#15
Teruhisa Takagishi, Masaya Takehara, Soshi Seike, Kazuaki Miyamoto, Keiko Kobayashi, Masahiro Nagahama
Clostridium perfringens α-toxin induces hemolysis of erythrocytes from various species, but it has not been elucidated whether the toxin affects erythropoiesis. In this study, we treated bone marrow cells (BMCs) from mice with purified α-toxin and found that TER119(+) erythroblasts were greatly decreased by the treatment. A variant α-toxin defective in enzymatic activities, phospholipase C and sphingomyelinase, had no effect on the population of erythroblasts, demonstrating that the decrease in erythroblasts was dependent of its enzymatic activities...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28698207/strict-tropism-for-cd71-cd234-human-reticulocytes-limits-plasmodium-cynomolgi-s-zoonotic-potential
#16
Varakorn Kosaisavee, Rossarin Suwanarusk, Adeline C Y Chua, Dennis E Kyle, Benoit Malleret, Rou Zhang, Mallika Imwong, Rawiwan Imerbsin, Ratawan Ubalee, Hugo Sámano-Sánchez, Bryan K S Yeung, Jessica Ong, Eric Lombardini, François Nosten, Kevin S W Tan, Pablo Bifani, Georges Snounou, Laurent Rénia, Bruce Russell
Two malaria parasites of Southeast Asian macaques, Plasmodium knowlesi and P. cynomolgi, can infect humans experimentally. In Malaysia, where both species are common, zoonotic knowlesi malaria has recently become dominant, and cases are recorded throughout the region. By contrast, to date only a single case of naturally acquired P. cynomolgi has been found in humans. In this study we show that whereas P. cynomolgi merozoites invade monkey red blood cells (RBCs) indiscriminately in vitro, for humans they are restricted to reticulocytes expressing both transferrin receptor 1 (Trf1 or CD71) and the Duffy antigen/chemokine receptor (DARC or CD234)...
July 11, 2017: Blood
https://www.readbyqxmd.com/read/28686201/feeding-a-mixture-of-choline-forms-during-lactation-improves-offspring-growth-and-maternal-lymphocyte-response-to-ex-vivo-immune-challenges
#17
Erin D Lewis, Caroline Richard, Susan Goruk, Emily Wadge, Jonathan M Curtis, René L Jacobs, Catherine J Field
Study objectives were to examine the impact of feeding a mixture of choline forms, or a diet high in glycerophosphocholine (GPC) on maternal immune function and offspring growth during lactation. Lactating Sprague-Dawley rat dams (n = 6/diet) were randomized to one of three diets, providing 1 g/kg total choline: Control (100% free choline (FC)), Mixed Choline (MC; 50% phosphatidylcholine (PC), 25% FC, 25% GPC), or High GPC (HGPC; 75% GPC, 12.5% PC, 12.5% FC). At 3 weeks, cell phenotypes and cytokine production with Concanavalin A (ConA)-or lipopolysaccharide (LPS)-stimulated splenocytes and mesenteric lymphocytes were measured...
July 7, 2017: Nutrients
https://www.readbyqxmd.com/read/28656755/microfluidic-separation-of-lymphoblasts-for-the-isolation-of-acute-lymphoblastic-leukemia-using-the-human-transferrin-receptor-as-a-capture-target
#18
Wenjie Li, Ye Zhang, C Patrick Reynolds, Dimitri Pappas
Acute lymphocytic leukemia (ALL) is the most prevalent pediatric cancer, and the peripheral blood lymphoblast percentage is an important index for ALL diagnosis and prognosis. We describe a microfluidic device that isolates and enumerates peripheral blood lymphoblasts using affinity separations. The innovative use of a nonspecific ligand allows a widespread "net" for cancer cells, without a priori knowledge of the cancer type. Using lymphoblasts spiked into blood, we simulated leukemia cases with lymphoblast concentrations ranging from 1 to 30% of total leukocytes...
July 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28651420/-effects-of-hypoxia-inducible-factor-1%C3%AE-on-p311-and-its-influence-on-the-migration-of-murine-epidermal-stem-cells
#19
Z D Xu, H S Li, S Wang, W F He, J Wu, G X Luo
Objective: To explore the effects of hypoxia inducible factor-1α (HIF-1α) on P311 and its influence on the migration of murine epidermal stem cells (ESCs) under hypoxia in vitro. Methods: Two kinds of murine ESCs were isolated and obtained from 15 neonatal wild-type C57BL/6J mice and 5 congeneric source P311 gene knock-out mice, respectively. The first passage of cells were used in the following experiments after morphologic observation and detection of expression of cell surface markers CD71 and CD49f with flow cytometer...
May 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28641612/-expression-and-significance-of-hif-1%C3%AE-in-erythropoiesis-of-secondary-iron-overload-disease-after-irradiation-damage
#20
Yi Xing, Ming-Feng Zhao, Xiao-Li Cao, Xin Jin, Jie Chen, Ping Xu, Song-Nan Sui, Yan-Yu Jiang, Xiao-Yuan He
OBJECTIVE: To study the expression of hypoxia inducible factor 1α(HIF-1α) of iron-overloaded in irradiated mice and its effect on erythropoiesis. METHODS: Twenty mice were randomly divided into 4 groups: Ctrl (control group), IR (irradiation group), IO (irradiation + iron overload group), and RAPA (rapamycin treatment group). The iron overload model was verified. The CFU-E (colony forming unit-erythroid) and BFU-E(burst colony forming unit-erythroid) were cultured; flow cytometry was used to detect the ratios of early stage (Ter119(+)CD71(-)) to late stage (Ter119(+)CD71(+)) of primitive erythroblasts; RT-PCR was used to detect the mRNA expression of HIF-1α and its related signal molecules in bone marrow cells...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
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