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Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society

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https://www.readbyqxmd.com/read/30004288/expression-of-luminal-progenitor-marker-cd117-in-the-human-breast-gland
#1
Jiyoung Kim, René Villadsen
CD117 is a putative marker of luminal progenitor cells in the human breast. However, so far mapping the expression pattern of CD117 within the normal gland has not been reported. Here, we examined the anatomical distribution of CD117-expressing cells in lobular and ductal structures by immunohistochemistry. The presence of CD117-positive luminal cells could be divided into three distinct patterns: (1) contiguous, with coherent positive cells and rare negative cells interspaced; (2) patched, with a roughly equal frequency of positive and negative cells distributed focally; or (3) scattered, with few or no positive cells in the structure...
July 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29985723/characterization-of-epidermal-lipoxygenase-expression-in-normal-human-skin-and-tissue-engineered-skin-substitutes
#2
Carolyne Simard-Bisson, Lorraine Andrée Parent, Véronique J Moulin, Bernard Fruteau de Laclos
Lipoxygenases (LOXs) are enzymes likely to be involved in corneocyte lipid envelope formation and skin barrier function. In humans, mutations in epidermis-type lipoxygenase 3 ( eLOX-3) and 12R-lipoxygenase ( 12R-LOX) genes are associated with autosomal recessive congenital ichthyosis (ARCI), whereas deletion of these genes in mice causes epidermal defects. LOXs also represent a matter of interest in psoriasis as well as in cancer research. However, their expression as well as the exact role of these enzymes in normal human skin have not been fully described...
July 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29969056/agitation-modules-flexible-means-to-accelerate-automated-freeze-substitution
#3
Siegfried Reipert, Helmuth Goldammer, Christine Richardson, Martin W Goldberg, Timothy J Hawkins, Elena Hollergschwandtner, Walter A Kaufmann, Sebastian Antreich, York-Dieter Stierhof
For ultrafast fixation of biological samples to avoid artifacts, high-pressure freezing (HPF) followed by freeze substitution (FS) is preferred over chemical fixation at room temperature. After HPF, samples are maintained at low temperature during dehydration and fixation, while avoiding damaging recrystallization. This is a notoriously slow process. McDonald and Webb demonstrated, in 2011, that sample agitation during FS dramatically reduces the necessary time. Then, in 2015, we (H.G. and S.R.) introduced an agitation module into the cryochamber of an automated FS unit and demonstrated that the preparation of algae could be shortened from days to a couple of hours...
July 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29969055/evaluation-of-lineage-changes-in-the-gastric-mucosa-following-infection-with-helicobacter-pylori-and-specified-intestinal-flora-in-ins-gas-mice
#4
Carolina Pinzon-Guzman, Anne R Meyer, Rachel Wise, Eunyoung Choi, Sureshkumar Muthupalani, Timothy C Wang, James G Fox, James R Goldenring
Gastric adenocarcinoma develops in metaplastic mucosa associated with Helicobacter pylori infection in the stomach. We have sought to evaluate the precise lineage changes in the stomachs of insulin-gastrin (INS-GAS) mice infected with H. pylori and/or intestinal flora (Altered Schaedler's Flora; ASF). Stomachs from groups infected with H. pylori contained progressive spasmolytic polypeptide-expressing metaplasia (SPEM) compared with germ-free and mice infected with ASF alone. The overall phenotype of the H...
July 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29906214/re-investigating-the-basement-membrane-zone-of-psoriatic-epidermal-lesions-is-laminin-511-a-new-player-in-psoriasis-pathogenesis
#5
Aki Natsumi, Koji Sugawara, Makiko Yasumizu, Yukari Mizukami, Shigetoshi Sano, Akimichi Morita, Ralf Paus, Daisuke Tsuruta
Psoriasis is a complex chronic inflammatory skin disease characterized by epidermal thickening on the basis of increased keratinocyte proliferation and insufficient apoptosis. Laminins are important components of the basement membrane (BM) and impact on epidermal keratinocyte growth/apoptosis. Although several laminins are involved in the pathogenesis of psoriasis, it is still controversial about the expression patterns of laminin isoforms and which laminins are important in the development of psoriasis. Because laminin-511 and -332 are key BM components in human skin, and laminin-511 stimulates human hair follicle growth, we asked whether the BM zone in psoriasis shows any laminin-related abnormalities...
June 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29873589/acute-and-chronic-iron-overloading-differentially-modulates-the-expression-of-cellular-iron-homeostatic-molecules-in-normal-rat-kidney
#6
Bassem Refaat, Abdelghany Hassan Abdelghany, Mohammad A BaSalamah, Mohamed El-Boshy, Jawwad Ahmad, Shakir Idris
Little is known about the renal responses to acute iron overloading. This study measured the renal tubular expression of transferrin receptor-1 (TfR1), cubilin/megalin receptors, hepcidin, ferroportin, and ferritin chains following subacute intoxication of 40 male Wistar rats with a single oral dose of ferrous iron (300 mg/kg). The animals were randomly subdivided into 4 equal subgroups at the time of necropsy (1, 2, 4, and 8 hr). The results were compared with the controls ( n=15) and with the chronic group ( n=15), which received iron for 4 weeks (75 mg/kg/day; 5 days/week)...
June 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29782809/the-effects-of-normal-aging-on-regional-accumulation-of-hyaluronan-and-chondroitin-sulfate-proteoglycans-in-the-mouse-brain
#7
May J Reed, Mamatha Damodarasamy, Jasmine L Pathan, Michelle A Erickson, William A Banks, Robert B Vernon
The brain changes in volume and composition with normal aging. Cellular components of the brain are supported by an extracellular matrix (ECM) comprised largely of hyaluronan (HA) and HA-associated members of the lectican family of chondroitin sulfate proteoglycans (CSPGs). We examined regional differences in microvascular density, neuronal and glial markers, and accumulation of HA and CSPGs in mouse brains during normal aging. The cortex, hippocampus, dentate gyrus, and cerebellum of young (4 months), middle-aged (14 months), and aged (24-26 months) brains were analyzed...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29775122/nitration-of-mnsod-in-the-carotid-body-and-adrenal-gland-induced-by-chronic-intermittent-hypoxia
#8
Esteban A Moya, Paulina Arias, Rodrigo Iturriaga
Chronic intermittent hypoxia (CIH), main feature of obstructive sleep apnea, produces nitro-oxidative stress, which contributes to potentiate carotid body (CB) chemosensory discharges and sympathetic-adrenal-axis activity, leading to hypertension. The MnSOD enzymatic activity, a key enzyme on oxidative stress control, is reduced by superoxide-induced nitration. However, the effects of CIH-induced nitration on MnSOD enzymatic activity in the CB and adrenal gland are not known. We studied the effects of CIH on MnSOD protein and immunoreactive (MnSOD-ir) levels in the CB, adrenal gland and superior cervical ganglion (SCG), and on 3-nitrotyrosine (3-NT-ir), CuZnSOD (CuZnSOD-ir), MnSOD nitration, and its enzymatic activity in the CB and adrenal gland from male Sprague-Dawley rats exposed to CIH for 7 days...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29775115/immunofluorescent-localization-of-non-myelinating-schwann-cells-and-their-interactions-with-immune-cells-in-mouse-thymus
#9
Dailun Hu, Philip K Nicholls, Changfu Yin, Khama Kelman, Qionglan Yuan, Wayne K Greene, Zhongli Shi, Bin Ma
The thymus is innervated by sympathetic/parasympathetic nerve fibers from the peripheral nervous system (PNS), suggesting a neural regulation of thymic function including T-cell development. Despite some published studies, data on the innervation and nerve-immune interaction inside the thymus remain limited. In the present study, we used immunofluorescent staining of glial fibrillary acidic protein (GFAP) coupled with confocal microscopy/three-dimensional (3D) reconstruction to reveal the distribution of non-myelinating Schwann cells (NMSC) and their interactions with immune cells inside mouse thymus...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29771178/islet-microvasculature-alterations-with-loss-of-beta-cells-in-patients-with-type-1-diabetes
#10
Joseph S Canzano, Lith H Nasif, Elizabeth A Butterworth, Dongtao A Fu, Mark A Atkinson, Martha Campbell-Thompson
Islet microvasculature provides key architectural and functional roles, yet the morphological features of islets from patients with type 1 diabetes are poorly defined. We examined islet and exocrine microvasculature networks by multiplex immunofluorescence imaging of pancreases from organ donors with and without type 1 diabetes ( n=17 and n=16, respectively) and determined vessel diameter, density, and area. We also analyzed these variables in insulin-positive and insulin-negative islets of 7 type 1 diabetes donors...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29762076/the-degeneration-of-the-vestibular-efferent-neurons-after-intratympanic-gentamicin-administration
#11
Qianru Wu, Yibo Zhang, Chunfu Dai, Yu Kong, Lijun Pan
Intratympanic gentamicin (ITG) has been used to treat refractory Ménière's disease. Disequilibrium after ITG was still a challenge for some patients, and the underlying mechanism is poorly understood. Our previous study demonstrated that gentamicin distributed in the bilateral vestibular efferent neurons (VEN) after ITG; however, does it lead to VEN damage and cause further disequilibrium in patients following ITG? In this study, we observed severe damaged gentamicin-positive neurons of VEN and severe fractured myelin layer plates around neural fibers when viewed under transmission electron microscopy at day 3 after ITG...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29741434/effects-of-oxaliplatin-treatment-on-the-myenteric-plexus-innervation-and-glia-in-the-murine-distal-colon
#12
Vanesa Stojanovska, Rachel M McQuade, Sarah Miller, Kulmira Nurgali
Oxaliplatin (platinum-based chemotherapeutic agent) is a first-line treatment of colorectal malignancies; its use associates with peripheral neuropathies and gastrointestinal side effects. These gastrointestinal dysfunctions might be due to toxic effects of oxaliplatin on the intestinal innervation and glia. Male Balb/c mice received intraperitoneal injections of sterile water or oxaliplatin (3 mg/kg/d) triweekly for 2 weeks. Colon tissues were collected for immunohistochemical assessment at day 14. The density of sensory, adrenergic, and cholinergic nerve fibers labeled with calcitonin gene-related peptide (CGRP), tyrosine hydroxylase (TH), and vesicular acetylcholine transporter (VAChT), respectively, was assessed within the myenteric plexus of the distal colon...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29737911/immunolocalization-of-advanced-glycation-end-products-mitogen-activated-protein-kinases-and-transforming-growth-factor-%C3%AE-smads-in-pelvic-organ-prolapse
#13
Antonella Vetuschi, Simona Pompili, Anna Gallone, Angela D'Alfonso, Maria Gabriella Carbone, Gaspare Carta, Claudio Festuccia, Eugenio Gaudio, Alessandro Colapietro, Roberta Sferra
Collagen and matrix metalloproteinases (MMP) play a pivotal role in the pathophysiology of Pelvic Organ Prolapse (POP) as a switch between type I and III collagen together with a simultaneous activation of MMPs have been observed in the vaginal wall. The aim of this study was to evaluate the Advanced Glycation End (AGE) products, ERK1/2 and transforming growth factor (TGF)-β/Smad pathway expression in muscularis propria in women with POP compared with control patients. We examined 20 patients with POP and 10 control patients treated for uterine fibromatosis...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29718759/increased-insulin-like-growth-factor-binding-protein-1-phosphorylation-in-decidualized-stromal-mesenchymal-cells-in-human-intrauterine-growth-restriction-placentas
#14
Sahil S Singal, Karen Nygard, Robert Gratton, Thomas Jansson, Madhulika B Gupta
Intrauterine growth restriction (IUGR) is often caused by placental insufficiency, which is believed to be associated with decreased delivery of oxygen and nutrients to the placental barrier. We recently reported that hypoxia and/or leucine deprivation triggered hyperphosphorylation of insulin-like growth factor binding protein-1 (IGFBP-1) in decidualized human immortalized endometrial stromal cells (HIESCs), resulting in decreased insulin-like growth factor-1 (IGF-1) bioactivity. To test the hypothesis that human IUGR is associated with increased decidual IGFBP-1 phosphorylation at discrete sites, we used IUGR and gestational age matched appropriate for gestational age (AGA) placentas ( n=5 each)...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29553869/association-between-mast-cells-and-collagen-maturation-in-chronic-periodontitis-in-humans
#15
Lívia S F E Ribeiro, Jean N Dos Santos, Clarissa A G Rocha, Patricia R Cury
Mast cells (MCs) can influence the maturation of collagen fibers. This study evaluated the relationship between the distribution and degranulation of MCs and collagen maturation in human gingival tissue in chronic periodontitis. A total of 16 specimens of patients clinically diagnosed as periodontitis and 18 controls clinically diagnosed as healthy or gingivitis were included. Immunohistochemistry and Picrosirius staining were performed to identify MCs and assess collagen fibers, respectively. Chi-square, t test, and Pearson's correlation test ( p<0...
June 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29462571/elucidating-the-burden-of-hiv-in-tissues-using-multiplexed-immunofluorescence-and-in-situ-hybridization-methods-for-the-single-cell-phenotypic-characterization-of-cells-harboring-hiv-in-situ
#16
Joshua J Vasquez, Rajaa Hussien, Brandon Aguilar-Rodriguez, Henrik Junger, Dejan Dobi, Timothy J Henrich, Cassandra Thanh, Erica Gibson, Louise E Hogan, Joseph McCune, Peter W Hunt, Cheryl A Stoddart, Zoltan G Laszik
Persistent tissue reservoirs of HIV present a major barrier to cure. Defining subsets of infected cells in tissues is a major focus of HIV cure research. Herein, we describe a novel multiplexed in situ hybridization (ISH) (RNAscope) protocol to detect HIV-DNA (vDNA) and HIV-RNA (vRNA) in formalin-fixed paraffin-embedded (FFPE) human tissues in combination with immunofluorescence (IF) phenotyping of the infected cells. We show that multiplexed IF and ISH (mIFISH) is suitable for quantitative assessment of HIV vRNA and vDNA and that multiparameter IF phenotyping allows precise identification of the cellular source of the ISH signal...
June 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29361239/new-method-for-quantitation-of-lipid-droplet-volume-from-light-microscopic-images-with-an-application-to-determination-of-pat-protein-density-on-the-droplet-surface
#17
Selma Y Dejgaard, John F Presley
Determination of lipid droplet (LD) volume has depended on direct measurement of the diameter of individual LDs, which is not possible when LDs are small or closely apposed. To overcome this problem, we describe a new method in which a volume-fluorescence relationship is determined from automated analysis of calibration samples containing well-resolved LDs. This relationship is then used to estimate total cellular droplet volume in experimental samples, where the LDs need not be individually resolved, or to determine the volumes of individual LDs...
June 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29350564/role-of-madcam-1-expressing-high-endothelial-venule-like-vessels-in-colitis-induced-in-mice-lacking-sulfotransferases-catalyzing-l-selectin-ligand-biosynthesis
#18
Shulin Low, Jotaro Hirakawa, Hitomi Hoshino, Kenji Uchimura, Hiroto Kawashima, Motohiro Kobayashi
Ulcerative colitis (UC) is a chronic inflammatory disease histologically characterized by diffuse mononuclear cell infiltrates in colonic mucosa. These inflammatory cells are considered to be recruited via high endothelial venule (HEV)-like vessels displaying mucosal addressin cell adhesion molecule 1 (MAdCAM-1), the ligand for α4β7 integrin, and/or peripheral lymph node addressin (PNAd), an L-selectin ligand. 6- O-sulfation of N-acetylglucosamine in the carbohydrate moiety of PNAd is catalyzed exclusively by N-acetylglucosamine-6- O-sulfotransferase 1 (GlcNAc6ST-1) and GlcNAc6ST-2...
June 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29328863/overexpression-of-mtor-and-p-240-244-s6-in-idh1-wild-type-human-glioblastomas-is-predictive-of-low-survival
#19
Luis Eduardo Machado, Arthur William Alvarenga, Fernanda Ferreira da Silva, Martín Roffé, Maria Dirlei Begnami, Luís Fernando Bleggi Torres, Isabela Werneck da Cunha, Vilma Regina Martins, Glaucia Noeli Maroso Hajj
PI3K/Akt/mTOR pathway activation is a hallmark of high-grade gliomas, which prompted clinical trials for the use of PI3K and mTOR inhibitors. However, the poor results in the original trials suggested that better patient profiling was needed for such drugs. Thus, accurate and reproducible monitoring of mTOR complexes can lead to improved therapeutic strategies. In this work, we evaluated the expression and phosphorylation of mTOR, RAPTOR, and rpS6 in 195 human astrocytomas and 30 normal brain tissue samples...
June 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29446690/perineurial-like-cells-and-ema-expression-in-the-suprachoroidal-region-of-the-human-eye
#20
Andrea R Gilbert, Patricia Chévez-Barrios, Matthew D Cykowski
The suprachoroidal region of the eye comprises vascular channels, melanocytes, and thin fibroblasts with elongated cytoplasm that are positioned directly adjacent to the densely collagenous sclera. Morphological similarities between these suprachoroidal fibroblasts and arachnoid cells and perineurial cells have been recognized, but whether these fibroblasts have a perineurial cell-like immunophenotype is not known. To further examine the relationship of these three cell types, we investigated the comparative expression of epithelial membrane antigen (EMA), the tight junction protein claudin-1, glucose transporter-1 (Glut-1), and CD34 in suprachoroidal fibroblasts, arachnoid of the optic nerve sheath, and perineurium of ciliary nerves in eight human eye specimens...
May 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
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