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https://www.readbyqxmd.com/read/29100035/the-role-of-human-chorionic-gonadotropin-in-regulation-of-na%C3%A3-ve-and-memory-t-cells-activity-in-vitro
#1
S A Zamorina, L S Litvinova, K A Yurova, O G Khaziakhmatova, V P Timganova, M S Bochkova, P V Khramtsov, M B Rayev
The role of human chorionic gonadotropin (hCG) in the regulation of molecular genetics factors determining the functional activity of human naïve and memory T cells in vitro was studied. It was found that hCG (10 and 100IU/ml) inhibited CD28 and CD25 expression on the naïve T cells (CD45RA+) and CD25 expression on the memory T cells (CD45R0+). hCG didn't affect the CD71 proliferation marker expression in total. Nevertheless, hCG reduced the percentage of proliferating memory T cells with simultaneous suppression of CD71 expression on proliferating CD45R0+cells...
October 28, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29094334/quantitative-mass-spectrometry-of-human-reticulocytes-reveal-proteome-wide-modifications-during-maturation
#2
Trang T T Chu, Ameya Sinha, Benoit Malleret, Rossarin Suwanarusk, Jung E Park, Renugah Naidu, Rupambika Das, Bamaprasad Dutta, Seow Theng Ong, Navin K Verma, Jerry K Chan, François Nosten, Laurent Rénia, Siu K Sze, Bruce Russell, Rajesh Chandramohanadas
Erythropoiesis is marked by progressive changes in morphological, biochemical and mechanical properties of erythroid precursors to generate red blood cells (RBC). The earliest enucleated forms derived in this process, known as reticulocytes, are multi-lobular and spherical. As reticulocytes mature, they undergo a series of dynamic cytoskeletal re-arrangements and the expulsion of residual organelles, resulting in highly deformable biconcave RBCs (normocytes). To understand the significant, yet neglected proteome-wide changes associated with reticulocyte maturation, we undertook a quantitative proteomics approach...
November 2, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/29076089/flow-cytometry-fcm-analysis-and-fluorescence-activated-cell-sorting-facs-of-erythroid-cells
#3
Xiuli An, Lixiang Chen
To study the process of erythropoiesis, it is important to be able to isolate erythroid progenitors and erythroblasts at distinct stages of development. During the past decade, considerable progress has been made on the development of flow cytometry (FCM) and fluorescence-activated cell sorting (FACS) methods for the analysis and isolation of both murine and human erythroid cells at distinct stages of erythropoiesis, based on changes in the expression of cell surface markers. A method for the identification of murine BFU-E and CFU-E cells was reported by Flygare et al...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29075958/a-rare-case-of-b-lymphoproliferative-disorder-with-villous-lymphocytes-harboring-t-8-14-q24-q32-translocation
#4
Xiaofeng Shi, Rong Ba, Haiyan You, Qian Jiang, Jiansong Huang, Jianhua Mao, Lanxiu Han, Shuo Zhang, Qin Zhuang, Xianqiu Yu, Lixia Wang, Yun Wang, Dongya Li, Wei Zhu, Yong Zhang, Yan Zhu, Xiaodong Xi
Splenic lymphoma with villous lymphocytes (SLVL) or splenic marginal zone lymphoma with circulating villous lymphocytes is rare, and prolymphocytic transformation of SLVL is rarer. At present, only one case of SLVL with t(8;14)(q24;q32) translocation has been reported. In this study, we report a case of Blymphoproliferative disorder with villous lymphocytes harboring t(8;14)(q24;q32) chromosome translocation that we inclined to SLVL with a prolymphocytic transformation. A 73-year-old female showed marked hepatosplenomegaly and high lymphocytosis (lymphocytes > 200 × 10(9)/L)...
October 27, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/29070145/-effect-of-erk1-2-signaling-pathway-inhibitor-pd98059-on-the-expression-of-ras-braf-mek-erk1-2-in-marrow-nucleated-red-blood-cells-of-cms-patients
#5
Yuan-Fang Han, Lin-Hua Ji, Ting-Ting Feng, Fang Liu, Sen Cui, Juan Su
OBJECTIVE: To investigate the effect of ERK1 / 2 signaling pathway inhibitor PD98059 on Ras, Raf, MEK, ERK1, ERK2 expression in order to explore a new way for basic research and clinical treatment of the chronic mountain sickness(CMS). METHODS: Sixteen CMS patients were selected, the bone marrow was collected for isolation of monomuclear cells (MNC), the cells were sorted by using CD71 and CD235a antibody magnetic beads, then positive cells were diveded into 5 groups: blank control, DMSO and PD98059 5, 10 and 20 µmol/L, and were cultured in hypoxid condition for 72 hours...
October 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/29067121/effect-of-testosterone-and-hypoxia-on-the-expansion-of-umbilical-cord-blood-cd34-cells-in-vitro
#6
Liping Zhou, Xiaowei Zhang, Panpan Zhou, Xue Li, Xuejing Xu, Qing Shi, Dong Li, Xiuli Ju
Successfully expanding hematopoietic stem cells (HSCs) is advantageous for clinical HSC transplantation. The present study investigated the influence of testosterone on the proliferation, antigen phenotype and expression of hematopoiesis-related genes in umbilical cord blood-derived cluster of differentiation (CD)34(+) cells under normoxic or hypoxia conditions. Cord blood (CB) CD34(+) cells were separated using magnetic activated cell sorting. A cytokine cocktail and feeder cells were used to stimulate the expansion of CD34(+) cells under normoxic (20% O2) and hypoxic (1% O2) conditions for 7 days and testosterone was added accordingly...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29046922/selection-and-identification-of-transferrin-receptor-specific-peptides-as-recognition-probes-for-cancer-cells
#7
Yuyu Tan, Wenli Liu, Zhi Zhu, Lijun Lang, Junxia Wang, Mengjiao Huang, Mingxia Zhang, Chaoyong Yang
Since the transferrin receptor (CD71 or TFRC) is known to be highly expressed in numerous cancers, CD71 has become an attractive target in cancer research. Acquiring specific molecular probes for CD71, such as small molecular ligands, aptamers, peptides, or antibodies, is of great importance for cancer cell recognition and capture. In this work, we chose CD71 as the target for phage display, and after four rounds of positive selection and one round of negative selection, the specific phage library was enriched...
October 18, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29045074/detection-of-autologous-blood-transfusions-using-a-novel-dried-blood-spot-method
#8
Holly D Cox, Geoffrey D Miller, Auriella Lai, Dan Cushman, Daniel Eichner
In doping control laboratories, autologous blood transfusions are currently detected using an indirect method that monitors changes in an athlete's hemoglobin concentration [Hb] and reticulocyte percent (Ret%) over time. The method is limited by the need for a phlebotomist to collect venous blood and the limited blood stability which requires temperature-controlled shipment and analysis within 72 hours. These limitations significantly reduce the number of samples collected from each athlete and thus the utility of the method...
October 16, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29039805/ferritin-heavy-subunit-silencing-blocks-the-erythroid-commitment-of-k562-cells-via-mir-150-up-regulation-and-gata-1-repression
#9
Fabiana Zolea, Anna Martina Battaglia, Emanuela Chiarella, Donatella Malanga, Carmela De Marco, Heather Mandy Bond, Giovanni Morrone, Francesco Costanzo, Flavia Biamonte
Erythroid differentiation is a complex and multistep process during which an adequate supply of iron for hemoglobinization is required. The role of ferritin heavy subunit, in this process, has been mainly attributed to its capacity to maintain iron in a non-toxic form. We propose a new role for ferritin heavy subunit (FHC) in controlling the erythroid commitment of K562 erythro-myeloid cells. FHC knockdown induces a change in the balance of GATA transcription factors and significantly reduces the expression of a repertoire of erythroid-specific genes, including α- and γ-globins, as well as CD71 and CD235a surface markers, in the absence of differentiation stimuli...
October 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29017823/erythroblast-differentiation-at-spleen-in-q137e-mutant-ribosomal-protein-s19-gene-knock-in-c57bl-6j-mice
#10
Koji Yamanegi, Naoko Yamada, Keiji Nakasho, Hiroshi Nishiura
We recently found that erythroblast-like cells derived from human leukaemia K562 cells express C5a receptor (C5aR) and produce its antagonistic and agonistic ligand ribosomal protein S19 (RP S19) polymer, which is cross-linked between K122 and Q137 by tissue transglutaminases. RP S19 polymer binds to the reciprocal C5aRs on erythroblast-like cells and macrophage-like cells derived from human monocytic THP-1 cells and promotes differentiation into reticulocyte-like cells through enucleation in vitro. To examine the roles of RP S19 polymer in mouse erythropoiesis, we prepared Q137E mutant RP S19 gene knock-in C57BL/6J mice...
October 5, 2017: Immunobiology
https://www.readbyqxmd.com/read/28980921/protease-sensitivity-and-redistribution-of-cd71-and-glycophorin-a-on-k562-cells
#11
C-H Yu, H Wang, Y Wang, N-X Cui, X Zhao, L Rong, Z-C Yi
Transmembrane proteins are delivered to plasma membrane from the endoplasmic reticulum and Golgi complex by vesicular transport along with the cytoskeletal network. Disruption of this process likely affects transmembrane protein expression. K562 cells were digested with Streptomyces griseus protease for different periods of time, and then re-cultured with different cytoskeletal and glycosylation inhibitors. Cell viability and surface expression of transferrin receptor (CD71) and glycophorin A (GPA) were analyzed before and after re-culture by flow cytometry...
September 30, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28894084/tbx3-dependent-amplifying-stem-cell-progeny-drives-interfollicular-epidermal-expansion-during-pregnancy-and-regeneration
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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