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Marrow morphology

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https://www.readbyqxmd.com/read/28336192/radiological-morphology-variances-of-transient-osteoporosis-of-the-hip
#1
Ryosuke Yamaguchi, Takuaki Yamamoto, Goro Motomura, Satoshi Ikemura, Kenyu Iwasaki, Garida Zhao, Yukihide Iwamoto
BACKGROUND: Although several morphological abnormalities or variances of the hip joint have been proposed to be associated with hip joint degeneration, few studies have investigated any radiological features in patients with transient osteoporosis of the hip (TOH). The purpose of this study is to evaluate the morphological variances of the hip joint in TOH patients radiographically. METHODS: The TOH group consisted of 31 hips in 31 patients. Age- and gender-matched asymptomatic hips in patients with unilateral osteonecrosis of the femoral head were served as controls...
March 20, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28335232/the-influence-of-modified-silica-nanomaterials-on-adult-stem-cell-culture
#2
Luigi Tarpani, Francesco Morena, Marta Gambucci, Giulia Zampini, Giuseppina Massaro, Chiara Argentati, Carla Emiliani, Sabata Martino, Loredana Latterini
The preparation of tailored nanomaterials able to support cell growth and viability is mandatory for tissue engineering applications. In the present work, silica nanoparticles were prepared by a sol-gel procedure and were then functionalized by condensation of amino groups and by adsorption of silver nanoparticles. Transmission electron microscopy (TEM) imaging was used to establish the morphology and the average dimensions of about 130 nm, which were not affected by the functionalization. The three silica samples were deposited (1 mg/mL) on cover glasses, which were used as a substrate to culture adult human bone marrow-mesenchymal stem cells (hBM-MSCs) and human adipose-derived stem cells (hASCs)...
June 4, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333411/utility-of-peripheral-blood-immunophenotyping-by-flow-cytometry-in-the-diagnosis-of-pediatric-acute-leukemia
#3
Laura K Metrock, Ryan J Summers, Sunita Park, Scott Gillespie, Sharon Castellino, Glen Lew, Frank G Keller
BACKGROUND: Childhood acute leukemia is traditionally diagnosed from a bone marrow aspirate (BMA). New-onset acute leukemia patients do not always have visible circulating blasts in the peripheral blood (PB) at diagnosis. While the role of bone marrow flow cytometry for the diagnosis of acute leukemia is well established, the utility of PB flow cytometry (PBFC) is unknown. We performed a single-institution retrospective analysis to compare PBFC versus BMA in establishing or excluding a diagnosis of childhood acute leukemia...
March 23, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28327460/comprehensive-proteomic-characterization-of-stem-cell-derived-extracellular-matrices
#4
Héloïse Ragelle, Alexandra Naba, Benjamin L Larson, Fangheng Zhou, Miralem Prijić, Charles A Whittaker, Amanda Del Rosario, Robert Langer, Richard O Hynes, Daniel G Anderson
In the stem-cell niche, the extracellular matrix (ECM) serves as a structural support that additionally provides stem cells with signals that contribute to the regulation of stem-cell function, via reciprocal interactions between cells and components of the ECM. Recently, cell-derived ECMs have emerged as in vitro cell culture substrates to better recapitulate the native stem-cell microenvironment outside the body. Significant changes in cell number, morphology and function have been observed when mesenchymal stem cells (MSC) were cultured on ECM substrates as compared to standard tissue-culture polystyrene (TCPS)...
March 7, 2017: Biomaterials
https://www.readbyqxmd.com/read/28326965/hematogones-detected-by-flow-cytometry-in-a-child-with-vitamin-b12-deficiency
#5
Lisa Sutton, Nkechi Mba
Vitamin B12 deficiency is a known cause of megaloblastic anemia and bone marrow failure. Bone marrow biopsies are not frequently performed as part of the diagnostic workup and can demonstrate morphologic features that overlap with myelodysplastic syndrome (MDS) and acute leukemia. We describe a case of a dysplastic bone marrow with increased bone marrow hematogones detected by flow cytometry in a child with vitamin B12 deficiency. Hematogones are normal B cell precursors, and hyperplasia has been described in a variety of often reactive conditions and also disease...
March 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28322042/differentiation-of-bone-marrow-stem-cells-into-schwann-cells-for-the-promotion-of-neurite-outgrowth-on-electrospun-fibers
#6
Jiajia Xue, Junyu Yang, Deirdre Margaret O'Connor, Chunlei Zhu, Da Huo, Nicholas M Boulis, Younan Xia
Seeding nerve guidance conduits with Schwann cells can improve the outcome of peripheral nerve injury repair. Bone marrow stem cells (BMSCs) represent a good choice of the cell source as they can differentiate into Schwann cells under appropriate conditions. In this work, we systematically investigated the differentiation of BMSCs into Schwann cells on scaffolds comprised of electrospun fibers. We changed the alignment, diameter, and surface properties of the fibers to optimize the differentiation efficiency...
March 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28321092/refractory-double-hit-lymphoma-leukemia-in-childhood-mimicking-b-precursor-acute-lymphoblastic-leukemia-at-initial-presentation
#7
Suguru Uemura, Daiichiro Hasegawa, Takehito Yokoi, Nanako Nino, Teppei Tahara, Akihiro Tamura, Atsuro Saito, Aiko Kozaki, Kenji Kishimoto, Toshiaki Ishida, Keiichiro Kawasaki, Nobuyuki Yamamoto, Takeshi Mori, Noriyuki Nishimura, Yoshiyuki Kosaka
A 10-year-old girl was referred to our hospital with left preauricular adenopathy and gingival swelling. She was diagnosed with B-cell precursor acute lymphoblastic leukemia (BCP-ALL) based on being positive for expressions of CD10, CD19, TdT and HLA-DR. She showed no CD20 expression at the time of diagnosis. Based on the initial diagnosis of BCP-ALL, induction chemotherapy for BCP-ALL was initiated. However, the blasts did not disappear from her peripheral blood. Bone marrow examination on day 33 identified 81...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28319418/autologous-cartilage-chip-transplantation-improves-repair-tissue-composition-compared-with-marrow-stimulation
#8
Bjørn Borsøe Christensen, Morten Lykke Olesen, Martin Lind, Casper Bindzus Foldager
BACKGROUND: Repair of chondral injuries by use of cartilage chips has recently demonstrated clinical feasibility. PURPOSE: To investigate in vivo cartilage repair outcome of autologous cartilage chips compared with marrow stimulation in full-thickness cartilage defects in a minipig model. STUDY DESIGN: Controlled laboratory study. METHODS: Six Göttingen minipigs received two 6-mm chondral defects in the medial and lateral trochlea of each knee...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28316120/synergistic-effects-of-g-csf-and-bone-marrow-stromal-cells-on-nerve-regeneration-with-acellular-nerve-xenografts
#9
Hua Jia, Ying Wang, Tao Wang, Yi Dong, Wei-Li Li, Jun-Ping Li, Wen-Zhi Ma, Xiao-Jie Tong, Zhong-Yi He
Peripheral nerve defects result in severe denervation presenting sensory and motor functional incapacitation. Currently, a satisfactory therapeutic treatment promoting the repair of injured nerves is not available. As shown in our previous study, acellular nerve xenografts (ANX) implanted with bone marrow stromal cells (BMSCs) replaced allografts and promoted nerve regeneration. Additionally, granulocyte-colony stimulating factor (G-CSF) has been proven to mobilize supplemental cells and enhance vascularization in the niche...
March 18, 2017: Synapse
https://www.readbyqxmd.com/read/28315453/defects-in-mitochondrial-energetic-function-compels-fanconi-anemia-cells-to-glycolytic-metabolism
#10
Enrico Cappelli, Paola Cuccarolo, Giorgia Stroppiana, Maurizio Miano, Roberta Bottega, Vanessa Cossu, Paolo Degan, Silvia Ravera
Energetic metabolism plays an essential role in the differentiation of haematopoietic stem cells (HSC). In Fanconi Anaemia (FA), DNA damage is accumulated during HSC differentiation, an event that is likely associated with bone marrow failure (BMF). One of the sources of the DNA damage is altered mitochondrial metabolism and an associated increment of oxidative stress. Recently, altered mitochondrial morphology and a deficit in the energetic activity in FA cells have been reported. Considering that mitochondria are the principal site of aerobic ATP production, we investigated FA metabolism in order to understand what pathways are able to compensate for this energy deficiency...
March 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28295390/mechanically-sensitive-a%C3%AE-nociceptors-that-innervate-bone-marrow-respond-to-changes-in-intra-osseous-pressure
#11
Sara Nencini, Jason Ivanusic
Whilst the sensory neurons and nerve terminals that innervate bone marrow have a morphology and molecular phenotype consistent with a role in nociception, little is known about their physiology or the mechanisms that generate and maintain bone pain. In the present study, we provide evidence that Aδ nociceptors that innervate the bone marrow respond to high threshold noxious mechanical stimulation, exhibit fatigue in response to prior stimulation, and in some cases can be sensitized by capsaicin. They can be classified on the basis of their response properties as either phasic-tonic units that appear to code for different intensities of intra-osseous pressure, or phasic units that code for the rate of change in intra-osseous pressure...
March 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28293405/diagnostic-utility-of-flow-cytometry-in-myelodysplastic-syndromes
#12
REVIEW
Matteo G Della Porta, Cristina Picone
The pathological hallmark of myelodysplastic syndromes (MDS) is marrow dysplasia, which represents the basis of the WHO classification of these disorders. This classification provides clinicians with a useful tool for defining the different subtypes of MDS and individual prognosis. The WHO proposal has raised some concern regarding minimal diagnostic criteria particularly in patients with normal karyotype without robust morphological markers of dysplasia (such as ring sideroblasts or excess of blasts). Therefore, there is clearly need to refine the accuracy to detect marrow dysplasia...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28293160/hemophagocytic-histiocytosis-a-clinicopathological-correlation
#13
Waseem Iqbal, Abdulaziz Ajlan Alsalloom, Khalid Shehzad, Faisal Mughal, Zafar Rasheed
OBJECTIVES: Histiocytic hyperplasia with hemophagocytosis (HP) is relatively uncommon condition that has often been mistaken in the past for neoplastic disorders. This study was conducted to investigate the possible etiology of HP, its intensity in the bone marrow (BM), and also its effect on hematological parameters with the extent of disease activity. METHODS: Blood samples were collected and BM examination was performed in 250 patients with varied etiology showing HP...
January 2017: International Journal of Health Sciences
https://www.readbyqxmd.com/read/28285408/essential-thrombocythemia-presenting-as-acute-coronary-syndrome-case-reports-and-literature-review
#14
Nanqing Xiong, Wen Gao, Junjie Pan, Xinping Luo, Haiming Shi, Jian Li
For the patients with essential thrombocythemia (ET), systemic thrombosis presents as one of the most dangerous complications. It's been widely accepted that acute coronary syndrome (ACS) is a kind of thrombotic diseases. However, there are very few case reports about ET first presenting as ACS. For some patients diagnosed as ACS, but without markedly elevated platelet, underlying ET was missed. And there are some controversies in the principles and target of treatment in those patients. We reported three cases of ACS, in which the patients who did not have common risk factors for coronary artery diseases and presented only mild atherosclerotic stenosis during coronary angiography, one of which had recurrent coronary artery thrombosis...
March 11, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/28282510/cxcr4-cd184-expression-on-stem-cell-harvest-and-cd34-cells-post-transplant
#15
Inas Asfour, Hanaa Afify, Shaza Elkourashy, Maryse Ayoub, Gihan Kamal, Mary Gamal, Ghada Elgohary
OBJECTIVES/BACKGROUND: CXCR4 is a receptor for stromal-derived factor-1 (SDF-1), a molecule that has a chemotactic activity for lymphocytes and is important in homing of hematopoietic stem cells to their adult marrow. We evaluated the CXCR4 (CD184) expression in the harvest cells and in the post-transplant bone marrow (BM) and its relation to engraftment, as determined by the consensus criteria and chimerism. METHODS: This is a prospective study which included 30 patients undergoing hematopoietic stem cell transplantation; 15 patients received autograft and 15 patients received allograft on dates between January 2012 and May 2014...
March 2, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28282470/phospholipid-scramblase-1-amplifies-anaphylactic-reactions-in-vivo
#16
Asma Kassas-Guediri, Julie Coudrat, Emeline Pacreau, Pierre Launay, Renato C Monteiro, Ulrich Blank, Nicolas Charles, Marc Benhamou
Mast cells are critical actors of hypersensitivity type I (allergic) reactions by the release of vasoactive and proinflammatory mediators following their activation by aggregation of the high-affinity receptor for immunoglobulin E (FcεRI). We have previously identified Phospholipid Scramblase 1 (PLSCR1) as a new molecular intermediate of FcεRI signaling that amplifies degranulation of the rat mast cell line RBL-2H3. Here we characterized primary mast cells from Plscr1-/- mice. The absence of PLSCR1 expression did not impact mast cell differentiation as evidenced by unaltered FcεRI expression, general morphology, amount of histamine stored and expression of FcεRI signal effector molecules...
2017: PloS One
https://www.readbyqxmd.com/read/28282221/collagen-augmentation-improves-the-quality-of-cartilage-repair-after-microfracture-in-patients-undergoing-high-tibial-osteotomy
#17
Man Soo Kim, In Jun Koh, Young Jun Choi, Kyu Hyung Pak, Yong In
BACKGROUND: The quality of cartilage repair after marrow stimulation is unpredictable. To overcome the shortcomings of the microfracture technique, various augmentation techniques have been developed. However, their efficacies remain unclear. HYPOTHESIS: The quality of cartilage repair and clinical outcomes would be superior in patients undergoing high tibial osteotomy (HTO) with microfracture and collagen augmentation compared to those undergoing HTO with microfracture alone without collagen augmentation for the treatment of medial compartment osteoarthritis (OA) of the knee...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28280089/successful-transfer-of-umbilical-cord-blood-cd34-hematopoietic-stem-and-progenitor-derived-nk-cells-in-older-acute-myeloid-leukemia-patients
#18
Harry Dolstra, Mieke W H Roeven, Jan Spanholtz, Basav N Hangalapura, Marleen Tordoir, Frans Maas, Marij Leenders, Fenna Bohme, Nina Kok, Carel Trilsbeek, Jos Paardekooper, Anniek B van der Waart, Peter E Westerweel, Tjeerd J F Snijders, Jan J Cornelissen, Gerard M J Bos, Hans F M Pruijt, Aniek O De Graaf, Bert van der Reijden, Joop H Jansen, Arnold van der Meer, Gerwin Huls, Jeannette Cany, Frank Preijers, Nicole M A Blijlevens, Nicolaas M Schaap
PURPOSE: Older acute myeloid leukemia (AML) patients have a poor prognosis, therefore novel therapies are needed. Allogeneic natural killer (NK) cells have been adoptively transferred with promising clinical results. Here, we report the first-in-human study exploiting an unique scalable NK cell product generated ex vivo from CD34+ hematopoietic stem and progenitor cells (HSPCs) from partially HLA-matched umbilical cord blood units. EXPERIMENTAL DESIGN: Ten older AML patients in morphologic complete remission received an escalating HSPC-NK cell dose (between 3 and 30x10^6/kg body weight) after lymphodepleting chemotherapy without cytokine boosting...
March 9, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28277103/hematologic-toxicity-in-anal-cancer-patients-during-combined-chemo-radiation-a-radiation-oncologist-perspective
#19
Pierfrancesco Franco, Francesca Arcadipane, Riccardo Ragona, Massimiliano Mistrangelo, Paola Cassoni, Patrizia Racca, Mario Morino, Gianmauro Numico, Umberto Ricardi
Hematologic toxicity is an important side effect occurring in patients affected with anal cancer, undergoing combined radio-chemotherapy, with consistent clinical meaningfulness. Areas covered: Since more than a half of bone marrow is comprised within the pelvic region, the radiation dose received by this functional compartment is crucial. Modern imaging modalities may provide a useful tool to identify bone marrow and new delivery technology may enhance the radiation oncologist's possibility to selectively spare these structures, potentially decreasing acute hematologic toxicity profile in this setting...
February 17, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28275019/reversal-of-isolated-20q-deletion-with-vitamin-b12-replacement-in-a-patient-with-pernicious-anaemia
#20
Shashank Reddy Cingam, Nebu Koshy, Diana Veillon, Prakash Peddi
Severe vitamin B12 deficiency is well known to cause morphological alterations in bone marrow. In rare instances, these myelodysplastic and megaloblastic changes can coexist with cytogenetic abnormalities. Here, we report a case of a 38-year-old African-American woman with pernicious anaemia, who was found to have an isolated 20q deletion and which resolved after vitamin B12 replacement. We also discuss various mechanisms in which vitamin B12 deficiency can lead to chromosomal abnormalities. A literature review is also performed to evaluate various other chromosomal aberrations associated with B12 deficiency...
March 8, 2017: BMJ Case Reports
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