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https://www.readbyqxmd.com/read/29456646/an-experimental-rabbit-model-of-symptomatic-cerebral-vasospasm-with-in-vivo-neuroimaging-assessment-and-ex-vivo-histological-validation
#1
Yunchang Mo, Luping Huang, Linbi Chen, Michael Veronesi, Yiyi Shi, Sijia Chen, Linli Peng, Leping Zhou, Yonglin Pu, Junlu Wang
Cerebral vasospasm (CVS) is a severe complication that occurs following aneurysmal subarachnoid hemorrhage (SAH). Magnetic resonance angiography (MRA) has been used to evaluate brain injury following SAH in humans. The present study was designed to assess a rabbit model of symptomatic CVS (SCVS) and the utility of MRA in evaluating SCVS in rabbits. Japanese white rabbits (n=24) were randomly divided into 2 equal groups: A sham group and a SAH group. Neurological scores were evaluated for 7 days following SAH...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29455007/embryoid-body-arrays-parallel-cryosectioning-of-spheroid-embryoid-body-samples-for-medium-through-put-analysis
#2
Ross Ferguson, Vasanta Subramanian
Three dimensional (3D) culture of mammalian cells is emerging as a powerful new tool to understand organogenesis as well as serve as models for diseases with implications for therapeutic evaluation. 3D cultures are referred to variously as spheroid, organoids or embryoid bodies. While many methods exist for large scale production of embryoid bodies or other spheroid cell aggregates, either at controlled sizes using microwell/micropatterned plates or uncontrolled sizes in suspension dishes, very few protocols exist for medium throughput analysis of differentiation at the histological level...
February 9, 2018: Stem Cell Research
https://www.readbyqxmd.com/read/29453564/identification-of-proliferative-and-apoptotic-sertoli-cells-using-fluorescence-and-confocal-microscopy
#3
Jesús Martínez-Hernández, Vicente Seco-Rovira, Ester Beltrán-Frutos, Victor Quesada-Cubo, Concepción Ferrer, Luis Miguel Pastor
Sertoli cells, the testicular somatic cells of the seminiferous epithelium, are vital for the survival of the epithelium. They undergo proliferation and apoptosis during fetal, neonatal, and prepubertal development. Apoptosis is increased in certain situations such as exposure to many substances, for example, toxics, or short photoperiod in the non-breeding season of some mammals. Therefore, it has always been considered that Sertoli cells that reach adulthood are quiescent cells, that is to say, nonproliferative, do not die, are terminally differentiated, and whose numbers remain constant...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29443880/magnetic-nanoparticles-interact-and-pass-an-in-vitro-co-culture-blood-placenta-barrier-model
#4
Elena K Müller, Christine Gräfe, Frank Wiekhorst, Christian Bergemann, Andreas Weidner, Silvio Dutz, Joachim H Clement
Magnetic nanoparticles are interesting tools for biomedicine. Before application, critical prerequisites have to be fulfilled. An important issue is the contact and interaction with biological barriers such as the blood-placenta barrier. In order to study these processes in detail, suitable in vitro models are needed. For that purpose a blood-placenta barrier model based on the trophoblast-like cell line BeWo and primary placenta-derived pericytes was established. This model was characterized by molecular permeability, transepithelial electrical resistance and cell-cell-contact markers...
February 14, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29443106/visualization-of-cortical-modules-in-flattened-mammalian-cortices
#5
Simon M Lauer, Undine Schneeweiß, Michael Brecht, Saikat Ray
The cortex of mammalian brains is parcellated into distinct substructures or modules. Cortical modules typically lie parallel to the cortical sheet, and can be delineated by certain histochemical and immunohistochemical methods. In this study, we highlight a method to isolate the cortex from mammalian brains and flatten them to obtain sections parallel to the cortical sheet. We further highlight selected histochemical and immunohistochemical methods to process these flattened tangential sections to visualize cortical modules...
January 22, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29442525/comparative-analysis-of-mesenchymal-stem-cells-from-bone-marrow-adipose-tissue-and-dental-pulp-as-sources-of-cell-therapy-for-zone-of-stasis-burns
#6
Ozan Luay Abbas, Orhan Özatik, Zeynep Burçin Gönen, Serdal Öğüt, Fikriye Yasemin Özatik, Hasan Salkın, Ahmet Musmul
INTRODUCTION: The implantation of mesenchymal stem cells (MSCs) has been shown to exert benefits for the survival of the zone-of-stasis. However, the clinical experience indicates the importance of selecting the right source and type of stem cells. Therefore, we planned the current study to perform a quantitative comparison of MSCs isolated from three different sources to provide information useful in selection of the optimal source and to see whether critical mechanisms are conserved between different populations...
February 14, 2018: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/29438673/distribution-of-nitric-oxide-synthase-in-the-rock-cavy-kerodon-rupestris-brain-i-the-diencephalon
#7
Maria Emanuela Martins Dos Reis, Lucimário Thiago Félix de Araújo, Wylqui Mikael Gomes de Andrade, Nayra da Silva Resende, Ruthnaldo Rodrigues Melo de Lima, Expedito Silva do Nascimento, Miriam Stela Maris de Oliveira Costa, Judney Cley Cavalcante
Nitric oxide (NO) is a highly soluble and membrane-permeable neurotransmitter, so it does not need to be packed in vesicles or have a membrane receptor. In the nervous system, NO is synthesized by the neuronal form of the nitric oxide synthase (NOS) enzyme and has been considered as a local neurotransmitter. NOS distribution is widespread in the nervous system of various vertebrate species, which may explain its participation in many functions such as memory, blood pressure regulation and sexual behavior. Here we used immunohistochemistry against NOS and NADPH diaphorase histochemistry to map the distribution of NO in the diencephalon of the rock cavy (Kerodon rupestris), a rodent endemic to the Brazilian Northeast...
February 10, 2018: Brain Research
https://www.readbyqxmd.com/read/29429695/histo-cytochemistry-and-scanning-electron-microscopy-for-studying-spatial-and-temporal-extraction-of-metabolites-induced-by-ultrasound-towards-chain-detexturation-mechanism
#8
B Khadhraoui, M Turk, A S Fabiano-Tixier, E Petitcolas, P Robinet, R Imbert, M El Maâtaoui, F Chemat
There are more than 1300 articles in scientific literature dealing with positive impacts of Ultrasound-Assisted Extraction (UAE) such as reduction of extraction time, diminution of solvent and energy used, enhancement in yield and even selectivity, intensification of diffusion, and eliminating wastes. This present study aims to understand what are the mechanism(s) behind these positive impacts which will help to design a decision tool for UAE of natural products. Different microscopic observations (Scanning Electron Microscopy (SEM), Environmental Scanning Electron Microscopy (e-SEM), Cyto-histochemistry) have been used for spacial and temporal localization of metabolites in rosemary leaves, which is one of the most studied and most important plant for its antioxidant metabolites used in food industry, during conventional and ultrasound extraction...
April 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29424033/mitochondrial-dysfunction-in-human-skeletal-muscle-biopsies-of-lipid-storage-disorder
#9
B Debashree, Manish Kumar, T S Keshava Prasad, Archana Natarajan, Rita Christopher, A Nalini, P S Bindu, N Gayathri, M M Srinivas Bharath
Mitochondria regulate the balance between lipid metabolism and storage in the skeletal muscle. Altered lipid transport, metabolism and storage influence the bioenergetics, redox status and insulin signalling contributing to cardiac and neurological diseases. Lipid storage disorders (LSDs) are neurological disorders which entail intramuscular lipid accumulation and impaired mitochondrial bioenergetics in the skeletal muscle causing progressive myopathy with muscle weakness. However, the mitochondrial changes including molecular events associated with impaired lipid storage have not been completely understood in the human skeletal muscle...
February 9, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29422992/pyrroloquinoline-quinone-plays-an-important-role-in-rescuing-bmi-1-mice-induced-developmental-disorders-of-teeth-and-mandible-anti-oxidant-effect-of-pyrroloquinoline-quinone
#10
Yuanqing Huang, Ning Chen, Dengshun Miao
To investigate whether pyrroloquinoline quinine (PQQ) plays an important role in rescuing Bmi-1-/- mice induced developmental disorders of teeth and mandible by regulating oxidative stress. We fed Bmi-1-/- mice a diet supplemented with PQQ (BKO+PQQ), BKO mice with normal diet (BKO) and wild type mice with normal diet (WT) as controls. We compared the differences of dental, mandibular phenotype by means of X-ray photography, micro CT scanning and three-dimensional reconstruction, HE staining, histochemistry, immunoistohemistry, TUNEL staining, Western blot and Flow cytometry in three groups of animals...
2018: American Journal of Translational Research
https://www.readbyqxmd.com/read/29410258/comprehensive-analysis-of-immune-extracellular-matrices-and-pathogens-profile-in-lung-granulomatosis-of-unexplained-etiology
#11
Paola da Costa Souza, Patrícia Suemi Dondo, Gabriela Souza, Deborah Lopes, Marcel Moscardi, Vinicius de Miranda Martinho, Rodolfo Daniel de Mattos Lourenço, Tabatha Prieto, Marcelo Luiz Balancin, Aline Kawassaki Assato, Walcy Rosolia Teodoro, Silvia Rodrigues, Mariana Lima, Maria Vera Castellano, Ester Coletta, Edwin Roger Parra, Vera Luiza Capelozzi
This study analyzed the Type 1 and Type 2T helper (Th-1/Th-2) cytokines (including interleukins), immune cellular, matrix profile and pathogens in granulomas with unexplained etiology and compared to infectious and non-infectious etiology. Surgical lung biopsies from 108 patients were retrospectively reviewed. Histochemistry, immunohistochemistry, immunofluorescence, morphometry and polymerase chain reaction (PCR) were employed, respectively, to evaluate total collagen and elastin fibers, collagen I and III, immune cells, cytokines, metalloproteinase-9 (MMP-9), myofibroblasts and multiple usual and unusual pathogens...
February 2, 2018: Human Pathology
https://www.readbyqxmd.com/read/29408808/pain-control-through-selective-chemo-axotomy-of-centrally-projecting-trpv1-sensory-neurons
#12
Matthew R Sapio, John K Neubert, Danielle M LaPaglia, Dragan Maric, Jason M Keller, Stephen J Raithel, Eric L Rohrs, Ethan M Anderson, John A Butman, Robert M Caudle, Dorothy C Brown, John D Heiss, Andrew J Mannes, Michael J Iadarola
Transient vanilloid potential 1 (TRPV1) agonists are emerging as highly efficacious non-opioid analgesics in preclinical studies. These drugs selectively lesion TRPV1+ primary sensory afferents, which are responsible for the transmission of many noxious stimulus modalities. Resiniferatoxin (RTX) is a very potent and selective TRPV1 agonist and is a promising candidate for treating many types of pain. Recent work establishing intrathecal application of RTX for the treatment of pain resulting from advanced cancer has demonstrated profound analgesia in client-owned dogs with osteosarcoma...
February 6, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29406446/comparison-of-different-scoring-systems-in-the-assessment-of-estrogen-receptor-status-for-predicting-prognosis-in-endometrial-cancer
#13
Yue Wang, Xiaolong Ma, Yuxiang Wang, Yan Liu, Congrong Liu
The objective of this article is to compare the effectiveness of various estrogen receptor (ER) scoring systems for predicting prognosis in endometrial cancer (EC). We retrospectively analyzed 195 cases of primary EC with complete follow-up information. Three different methods-the American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) criterion, histochemistry score (H-score), and Allred scoring system-were used to assess the degree of staining, and comparisons were made to determine which method correlated best with clinical outcomes...
February 5, 2018: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/29396198/morphodifferentiation-of-gen%C3%A3-s-organ-in-engorged-amblyomma-sculptum-berlese-1888-female-ticks-acari-ixodidae
#14
Marcelo Francisco Dos Santos, Magna Aparecida Maltauro Soares, Maria Anete Lallo, Darci Moraes Barros-Battesti, Solange de Lima-Netto, Diva Denelle Spadacci-Morena
The Gené's organ (GO) secretes a waxy substance on eggs that reduces water loss and has antimicrobial properties. The current study evaluated morphological and histochemical aspects of GO in Amblyomma sculptum from the period of post-feeding - when ticks detach from the host - to the stage just before oviposition. In this species, GO is composed of a corpus and two pairs of glands, namely, cranial and caudal. Glandular cells are joined laterally by a system of interdigitating membranes with junctional complexes...
January 29, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29394523/leaf-blade-structure-of-verbesina-macrophylla-cass-f-s-blake-asteraceae-ontogeny-duct-secretion-mechanism-and-essential-oil-composition
#15
Laís de Almeida Bezerra, Pedro Antonio Oliveira Mangabeira, Rosilene Aparecida de Oliveira, Larissa Corrêa do Bomfim Costa, Maura Da Cunha
BACKGROUND: Secretory structures are common in Asteraceae, where they exhibit a high degree of morphological diversity. The species Verbesina macrophylla, popularly known as assa-peixe, is native to Brazil where it is widely used for medicinal purposes. Despite its potential medical importance there have been no studies of the anatomy of this species, especially regarding its secretory structures, or of its secreted compounds. This study aimed to study the anatomy of leaves of V. macrophylla with an emphasis on its secretory structures and secreted secondary metabolites...
February 2, 2018: Plant Biology
https://www.readbyqxmd.com/read/29391529/small-molecule-flunarizine-increases-smn-protein-in-nuclear-cajal-bodies-and-motor-function-in-a-mouse-model-of-spinal-muscular-atrophy
#16
Delphine Sapaly, Matthieu Dos Santos, Perrine Delers, Olivier Biondi, Gwendoline Quérol, Léo Houdebine, Kevinee Khoobarry, François Girardet, Philippe Burlet, Anne-Sophie Armand, Christophe Chanoine, Jean-François Bureau, Frédéric Charbonnier, Suzie Lefebvre
The hereditary neurodegenerative disorder spinal muscular atrophy (SMA) is characterized by the loss of spinal cord motor neurons and skeletal muscle atrophy. SMA is caused by mutations of the survival motor neuron (SMN) gene leading to a decrease in SMN protein levels. The SMN deficiency alters nuclear body formation and whether it can contribute to the disease remains unclear. Here we screen a series of small-molecules on SMA patient fibroblasts and identify flunarizine that accumulates SMN into Cajal bodies, the nuclear bodies important for the spliceosomal small nuclear RNA (snRNA)-ribonucleoprotein biogenesis...
February 1, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29379349/combination-of-intensity-modulated-radiotherapy-followed-treatment-with-p38-mapk-activation-inhibitor-inhibits-the-proliferation-of-mcf-7-breast-cancer-cells
#17
Jianhua Zhao, Guanxun Cheng, Jing Liu
The present study was aimed to investigate the effect of intensity modulated radiotherapy (IMRT) followed by treatment with inhibitor for p38 MAPK, SB203580 on the rate of proliferation in drug resistant MCF-7 breast cancer cells. Interestingly, the results from immuno histochemistry and western blot assays revealed higher level of distribution of activated p38 MAPK in the drug resistant breast cancer tissues compared to the primary tissues. Treatment of the drug resistant MCF-7 cells with SB203580 led to a significant decrease in the phosphorylation of p38 MAPK...
January 2018: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/29374186/three-dimensional-histochemistry-and-imaging-of-human-gingiva
#18
Adriano Azaripour, Tonny Lagerweij, Christina Scharfbillig, Anna Elisabeth Jadczak, Britt van der Swaan, Manon Molenaar, Rens van der Waal, Karoline Kielbassa, Wikky Tigchelaar, Daisy I Picavet, Ard Jonker, Esther M L Hendrikx, Vashendriya V V Hira, Mohammed Khurshed, Cornelis J F Van Noorden
In the present study, 3D histochemistry and imaging methodology is described for human gingiva to analyze its vascular network. Fifteen human gingiva samples without signs of inflammation were cleared using a mixture of 2-parts benzyl benzoate and 1-part benzyl alcohol (BABB), after being immunofluorescently stained for CD31, marker of endothelial cells to visualize blood vessels in combination with fluorescent DNA dyes. Samples were imaged in 3D with the use of confocal microscopy and light-sheet microscopy and image processing...
January 26, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29372883/brain-repair-by-hematopoietic-growth-factors-in-the-subacute-phase-of-traumatic-brain-injury
#19
Gentian Toshkezi, Michele Kyle, Sharon L Longo, Lawrence S Chin, Li-Ru Zhao
OBJECTIVE Traumatic brain injury (TBI) is a major cause of long-term disability and death in young adults. The lack of pharmaceutical therapy for post-acute TBI recovery remains a crucial medical challenge. Stem cell factor (SCF) and granulocyte colony-stimulating factor (G-CSF), which are 2 key hematopoietic growth factors, have shown neuroprotective and neurorestorative effects in experimental stroke. The objective of this study was to determine the therapeutic efficacy of combined treatment (SCF + G-CSF) in subacute TBI...
January 26, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29367194/construction-of-fgf21-knockout-mouse-models-by-the-crispr-cas9-system
#20
Xu Liu, Ping Zhang, Xiao-Feng Zhang, Xing Li, Yu Bai, Ke-Rong Jia, Xiao-Dong Guo, Hao Zhang, Xiao-Yan Ma, Ming Cang, Dong-Jun Liu, Xu-Dong Guo
Fibroblast growth factors (FGFs) are multifunctional signal molecules between cells, regulating the various physiological functions of the organism. FGF21 is a regulatory factor of the FGF family and has been postulated to play important roles in hair follicle development and hair follicle growth cycle. To evaluate the roles of FGF21, we had established a FGF21 knockout mouse model, using the CRISPR/Cas9 technology. We had constructed a FGF21 targeting vector and microinjected it with Cas9 mRNA and gRNA into fertilized ova of FVB mice...
January 20, 2018: Yi Chuan, Hereditas
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