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European Journal of Histochemistry: EJH

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https://www.readbyqxmd.com/read/30418011/ultrastructural-histochemistry-in-biomedical-research-alive-and-kicking
#1
Manuela Malatesta
The high-resolution images provided by the electron microscopy has constituted a limitless source of information in any research field of life and materials science since the early Thirties of the last century. Browsing the scientific literature, electron microscopy was especially popular from the 1970's to 80's, whereas during the 90's, with the advent of innovative molecular techniques, electron microscopy seemed to be downgraded to a subordinate role, as a merely descriptive technique. Ultrastructural histochemistry was crucial to promote the Renaissance of electron microscopy, when it became evident that a precise localization of molecules in the biological environment was necessary to fully understand their functional role...
November 7, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30362673/regenerative-potential-of-the-bichat-fat-pad-determined-by-the-quantification-of-multilineage-differentiating-stress-enduring-cells
#2
Giamaica Conti, Dario Bertossi, Elena Dai Prè, Chiara Cavallini, Maria Teresa Scupoli, Giulia Ricciardi, Pierpaolo Parnigotto, Yves Saban, Andrea Sbarbati, Pierfrancesco Nocini
Published studies regarding Bichat fat pad focused, quite exclusively, on the implant of this adipose depot for different facial portions reconstruction. The regenerative components of Bichat fat pad were poorly investigated. The present study aimed to describe by an ultrastructural approach the Bichat fat pad, providing novel data at the ultrastructural and cellular level. This data sets improve the knowledge about the usefulness of the Bichat fat pad in regenerative and reconstructive surgery. Bichat fat pads were harvested form eight patients subjected to maxillofacial, dental and aesthetic surgeries...
October 23, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30362674/mouse-oocyte-development-methods-and-protocols
#3
Manuela Monti
The Springer Protocols series "Methods in Molecular Biology" has published its 1818th volume which is entirely devoted to the development of the female gamete: the oocyte.
September 26, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30362672/cytoplasmic-lattices-are-not-linked-to-mouse-2-cell-embryos-developmental-arrest
#4
Marianna Longo, Michele Boiani, CarloAlberto Redi, Manuela Monti
Cytoplasmic lattices are important regulators of oocyte maturation. They store components of the protein synthesis machinery including ribosomes and, among others, they are involved in the regulation of microtubule dynamics in both mouse and human. Cytoplasmic lattices undergo dramatic reorganizations at crucial stages of oocyte maturation, where they are abundantly present in the cytoplasm of developmentally competent oocytes named SN (Surrounded Nucleolus) while they are rare in the cytoplasm of 2-cell stage-arresting NSN (Not Surrounded Nucleolus) oocytes, suggestive of a requirement of cytoplasmic lattices for development past the 2-cell stage...
September 24, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30223640/study-of-liver-in-hbv-related-hepatocellular-carcinoma-stereology-shows-quantitative-differences-in-liver-structure
#5
Bita Moudi, Zahra Heidari, Hamidreza Mahmoudzadeh-Sagheb
Hepatocellular carcinoma is one of the main consequences of liver chronic disease. Hepatocellular carcinoma-related changes may be seen in patients with chronic hepatitis B. The aim of the current study was to quantitate liver tissue elements by stereological technique in patients with hepatitis B-related cancer and compare the results with control and only hepatitis B group. Needle liver biopsies from 40 patients with only chronic hepatitis B infection, from 41 patients with only early hepatocellular carcinoma, from 40 patients with early hepatitis B-related cancer and 30 healthy subjects (control group) were analyzed by stereological method using systematic uniform random sampling method...
September 18, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30362671/cancer-stem-cell-markers-aldh1-and-cd44-cd24-phenotype-and-their-prognosis-impact-in-invasive-ductal-carcinoma
#6
Iris Rabinovich, Ana Paula Martins Sebastião, Rubens Silveira Lima, Cícero De Andrade Urban, Eduardo Schunemann Junior, Karina Furlan Anselmi, Selene Elifio-Esposito, Lucia De Noronha, Andréa Novais Moreno-Amaral
Breast cancer is a very heterogeneous disease. The intrinsic molecular subtypes can explain the intertumoral heterogeneity and the cancer stem cell (CSC) hypothesis can explain the intratumoral heterogeneity of this kind of tumor. CD44+/CD24- phenotype and ALDH1 expression are the major CSC markers described in invasive breast cancer. In the present study, 144 samples of invasive breast carcinoma, no special type were distributed in 15 tissue microarrays (TMA) and then evaluated for expression of the CD44+/CD24- phenotype and ALDH1 to understand the importance of these CSC markers and the clinical aspects of breast cancer...
September 3, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30176704/low-ozone-concentrations-promote-adipogenesis-in-human-adipose-derived-adult-stem-cells
#7
Manuela Costanzo, Federico Boschi, Flavia Carton, Giamaica Conti, Viviana Covi, Gabriele Tabaracci, Andrea Sbarbati, Manuela Malatesta
Ozone is a strong oxidant, highly unstable atmospheric gas. Its medical use at low concentrations has been progressively increasing as an alternative/adjuvant treatment for several diseases. In this study, we investigated the effects of mild ozonisation on human adipose-derived adult stem (hADAS) cells i.e., mesenchymal stem cells occurring in the stromal-vascular fraction of the fat tissue and involved in the tissue regeneration processes. hADAS cells were induced to differentiate into the adipoblastic lineage, and the effect of low ozone concentrations on the adipogenic process was studied by combining histochemical, morphometric and ultrastructural analyses...
September 3, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30173504/from-fix-to-fit-into-the-autoptic-human-brains
#8
Beatrice Paradiso, Michele Simonato, Gaetano Thiene, Anna Lavezzi
Formalin-fixed, paraffinembedded (FFPE) human brain tissues are very often stored in formalin for long time. Formalin fixation reduces immunostaining, and the DNA/RNA extraction from FFPE brain tissue becomes suboptimal. At present, there are different protocols of fixation and several procedures and kits to extract DNA/RNA from paraffin embedding tissue, but a gold standard protocol remains distant. In this study, we analyzed four types of fixation systems and compared histo and immuno-staining. Based on our results, we propose a modified method of combined fixation in formalin and formic acid for the autoptic adult brain to obtain easy, fast, safe and efficient immunolabelling of long-stored FFPE tissue...
August 27, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30089353/analysis-of-mineral-apposition-rates-during-alveolar-bone-regeneration-over-three-weeks-following-transfer-of-bmp-2-7-gene-via-in-vivo-electroporation
#9
Mariko Kawai, Yohei Kataoka, Junya Sonobe, Hiromitsu Yamamoto, Hiroki Maruyama, Toshio Yamamoto, Kazuhisa Bessho, Kiyoshi Ohura
Alveolar bone is not spontaneously regenerated following trauma or periodontitis. We previously proposed an animal model for new alveolar bone regeneration therapy based on the non-viral BMP-2/7 gene expression vector and in vivo electroporation, which induced the formation of new alveolar bone over the course of a week. Here, we analysed alveolar bone during a period of three weeks following gene transfer to periodontal tissue. Non-viral plasmid vector pCAGGS-BMP-2/7 or pCAGGS control was injected into palatal periodontal tissue of the first molar of the rat maxilla and immediately electroporated with 32 pulses of 50 V for 50 msec...
August 9, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30088716/expression-of-acetylated-tubulin-in-the-postnatal-developing-mouse-cochlea
#10
Wenjing Liu, Chuanxi Wang, Hao Yu, Shaofeng Liu, Jun Yang
Acetylation tubulin is one of the major post-translational modifications of microtubules. Stable microtubules are well known to contain acetylated tubulin. Here, we examined the spatiotemporal expression of acetylated tubulin in the mouse cochlea during postnatal development. At postnatal day 1 (P1), acetylated tubulin was localized primarily to the auditory nerve inside the cochlea and their synaptic contacts with the inner and outer hair cells (IHCs and OHCs). In the organ of Corti, acetylated tubulin occurred first at the apex of pillar cells...
August 8, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30064196/interaction-between-sphingosine-kinase-sphingosine-1-phosphate-and-transforming-growth-factor-%C3%AE-smads-pathways-in-experimental-intestinal-fibrosis-an-in-vivo-immunohistochemical-study
#11
Roberta Sferra, Simona Pompili, Luca Ventura, Caroline Dubuquoy, Silvia Speca, Eugenio Gaudio, Giovanni Latella, Antonella Vetuschi
A concomitant action of multiple profibrotic mediators appears crucial in the development and progression of fibrosis. Sphingosine kinase/sphingosine 1 phosphate and transforming growth factor-β/Smads pathways are both involved in pathogenesis of fibrosis in several organs by controlling differentiation of fibroblasts to myofibroblasts and the epithelial to-mesenchymal transition. However, their direct involvement in chronic colitis-associated fibrosis it is not yet known. In this study we evaluated the immunohistochemical expression of some proteins implicated in sphingosine kinase/sphingosine 1 phosphate and transforming growth factor-β/Smads pathways in Dextrane Sodium Sulphate (DSS)-induced colorectal fibrosis in mice...
July 31, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30043597/effect-of-high-fat-mixed-lipid-diet-and-swimming-on-fibre-types-in-skeletal-muscles-of-rats-with-colon-tumours
#12
Vika Smerdu, Martina Perše
Skeletal muscle fibre types, whose characteristics are determined by myosin heavy chain (MyHC) isoforms, can adapt to changed physiological demands with changed MyHC isoform expression resulting in the fibre type transitions. The endurance training is known to induce fast-to-slow transitions and has beneficial effect in carcinogenesis, whereas the effect of an excessive fat intake and its interaction with the effect of swimming are less conclusive. Therefore, we studied the effect of high-fat mixed lipid (HFML) diet and long-term (21-week) swimming on fibre type transitions and their average diameters by immunohistochemical demonstration of MyHC isoforms in slow soleus (SOL), fast extensor digitorum longus (EDL), and mixed gastrocnemius medialis and lateralis (GM, GL) muscles, divided to deep and superficial portions (GMd, GMs, GLd, GLs), of sedentary and swimming Wistar rats with experimentally (dimethylhydrazine) induced colon tumours and fed either with HFML or low-fat corn oil (LFCO) diet...
July 25, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30043596/activation-of-the-renin-angiotensin-system-in-mice-aggravates-mechanical-loading-induced-knee-osteoarthritis
#13
Kotaro Yamagishi, Ichiro Tsukamoto, Fumihisa Nakamura, Kazuhiko Hashimoto, Kazuhiro Ohtani, Masao Akagi
Epidemiological studies have shown an association between hypertension and knee osteoarthritis (OA). The purpose of this study was to investigate whether activation of the renin-angiotensin system (RAS) can aggravate mechanical loading-induced knee OA in mice. Eight-week-old male Tsukuba hypertensive mice (THM) and C57BL/6 mice were divided into running and non-running groups. Mice in the running group were forced to run (25 m/min, 30 min/day, 5 days/week) on a treadmill. All mice in the four groups (n=10 in each group) were euthanized after 0, 2, 4, 6, or 8 weeks of running or natural breeding...
July 24, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30043595/distribution-of-choline-acetyltransferase-chat-immunoreactivity-in-the-brain-of-the-teleost-cyprinus-carpio
#14
Arianna Casini, Rosa Vaccaro, Mattia Toni, Carla Cioni
Cholinergic systems play a role in basic cerebral functions and its dysfunction is associated with deficit in neurodegenerative disease. Mechanisms involved in human brain diseases, are often approached by using fish models, especially cyprinids, given basic similarities of the fish brain to that of mammals. In the present paper, the organization of central cholinergic systems have been described in the cyprinid Cyprinus carpio, the common carp, by using specific polyclonal antibodies against ChAT, the synthetic enzyme of acetylcholine, that is currently used as a specific marker for cholinergic neurons in all vertebrates...
July 24, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/30043594/damaged-muscle-fibers-might-masquerade-as-hybrid-fibers-a-cautionary-note-on-immunophenotyping-mouse-muscle-with-mouse-monoclonal-antibodies
#15
Morium Begam, Joseph A Roche
We report that, labeling mouse muscle tissue, with mouse monoclonal antibodies specific to slow or fast myosin heavy chain (sMyHC and fMyHC, respectively), can lead to artefactual labeling of damaged muscle fibers, as hybrid fibers (sMyHC+ and fMyHC+).  We demonstrate that such erroneous immunophenotyping of muscle may be avoided, by performing colabeling or serial-section-labeling, to identify damaged fibers. The quadriceps femoris muscle group (QF) in 7-month-old, male, C57BL/6J mice had: 1.21 ± 0.21%, 98...
July 24, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29943957/galnac-t15-in-gastric-adenocarcinoma-characterization-according-to-tissue-architecture-and-cellular-location
#16
Mário S De Souza Albuquerque, Antônio F Da Silva-Filho, Marina Ferraz Cordeiro, Maria de Fátima Deodato de Souza, Michael W L Quirino, Luiza R Amorim Lima, Maira G Da Rocha Pitta, Mario R Martins, Moacyr J B De Melo Rêgo
Gastric cancer (GC) is the second most common cause of cancer-related deaths in the world. This study aims to investigate the differential tissue expression of ppGalNAc-T15 and to evaluate its possible association with clinical-pathological parameters and outcome of gastric adenocarcinoma patients. For these 70 patients were evaluated the expression by immunohistochemistry to ppGalNAc-T15. Our results showed that 33 (47.1%) patients were ppGalNAC-T15+ positive and 37 (52.9%) negative. Positive staining for ppGalNAc-T15 was significantly present in patients older than 60 years (P=0...
June 14, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29943956/appearance-of-%C3%AE-dystroglycan-precedes-the-formation-of-glio-vascular-end-feet-in-developing-rat-brain
#17
Mihály Kálmán, Erzsébet Oszwald, István Adorján
Dystroglycan has an important role in binding of perivascular glial end-feet tothe basal lamina. Its β-subunit is localized in the glial end-feet. The investigation period lasted from E(embryonic day)12 to E20. Laminin and β-dystroglycan were detected by immunohistochemistry, the glial localization of the latter one was supported  by electron microscopy. The immatureglial structures were visualized by the immunostaining of nestin. The β-dystroglycan immunoreactivity appeared at E16 following the laminin of basal lamina but preceding the perivascular processes of radial glia (E18) and astrocyte-like cells (E20)...
May 18, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29943955/the-role-of-mutated-sod1-gene-in-synaptic-stripping-and-mhc-class-i-expression-following-nerve-axotomy-in-als-murine-model
#18
Roman M Kassa, Roberta Bonafede, Federico Boschi, Manuela Malatesta, Raffaella Mariotti
Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease characterized by motoneuron death. Several cellular pathways have been described to be involved in ALS pathogenesis; however, the involvement of presynaptic stripping and the related MHC class I molecules in mutant SOD1 motoneurons remains to be clarified. To this purpose, we here investigated, for the first time, the motoneurons behavior, di per seand after facial axonal injury, in terms of synaptic stripping and MHC class I expression in wild-type (Wt) mice and in a murine model of ALS, the SOD1(G93A) mice, at the presymptomatic and symptomatic stage of the disease...
May 17, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29943949/marine-bisindole-alkaloid-a-potential-apoptotic-inducer-in-human-cancer-cells
#19
Sara Salucci, Sabrina Burattini, Francesca Buontempo, Ester Orsini, Lucia Furiassi, Michele Mari, Simone Lucarini, Alberto M Martelli, Elisabetta Falcieri
Marine organisms such as corals, sponges and tunicates produce active molecules which could represent a valid starting point for new drug development processes. Among the various structural classes, the attention has been focused on 2,2-bis(6-bromo-3-indolyl) ethylamine, a marine alkaloid which showed a good anticancer activity against several tumor cell lines. Here, for the first time, the mechanisms of action of 2,2-bis(6-bromo-3-indolyl) ethylamine have been evaluated in a U937 tumor cell model. Morpho-functional and molecular analyses, highlighting its preferred signaling pathway, demonstrated that apoptosis is the major death response induced by this marine compund...
April 10, 2018: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29943954/atp-metabolizing-enzymes-enpp1-2-and-3-are-localized-in-sensory-neurons-of-rat-dorsal-root-ganglion
#20
Kentaro Nishida, Yuka Nomura, Kanako Kawamori, Akihiro Ohishi, Kazuki Nagasawa
In dorsal root ganglion (DRG) neurons, ATP is an important neurotransmitter in nociceptive signaling through P2 receptors (P2Rs) such as P2X2/3R, and adenosine is also involved in anti-nociceptive signaling through adenosine A1R. Thus, the clearance system for adenine nucleotide/nucleoside plays a critical role in regulation of nociceptive signaling, but there is little information on it, especially ectoenzyme expression profiles in DRG. In this study, we examined expression and localization of ecto-nucleotide pyrophosphatase/phosphodiesterases (ENPPs), by which ATP is metabolized to AMP, in rat DRG...
April 9, 2018: European Journal of Histochemistry: EJH
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