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European Journal of Histochemistry: EJH

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
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
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
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
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
Bin Ma, Changfu Yin, Dailun Hu, Mark Newman, Philip K Nicholls, Zhanjun Wu, Wayne K Greene, Zhongli Shi
The nervous system and the immune system communicate extensively with each other in order to maintain homeostasis and to regulate the immune response. The peripheral nervous system (PNS) communicates specifically with the immune system according to local interactions, including the "hardwiring" of sympathetic/parasympathetic (efferent) and sensory nerves (afferent) to lymphoid tissue and organs. To reveal this type of bidirectional neuroimmune interaction at the microscopic level, we used immunofluorescent staining of glial fibrillary acidic protein (GFAP) coupled with confocal microscopy/3D reconstruction to reveal the distribution of non-myelinating Schwann cells (NMSCs) and their interactions with immune cells inside mouse spleen...
April 3, 2018: European Journal of Histochemistry: EJH
Gabriele Bobek, Tim Stait-Gardner, William Price, Angela Makris, Annemarie Hennessy
Abnormal development of the placenta is postulated to be central to the aetiology of preeclampsia. This study investigates changes in placental histopathology in mouse models of preeclampsia compared to the morphology using magnetic resonance microscopy (MRM) (11.7 T) of intact ex vivo tissue followed by 3D analysis of the image data. Here, C57BL/6JArc pregnant mice were subject to either normal pregnancy (n=3), or to one of two experimental models of preeclampsia; TNF-α infusion  (n=3) or reduced uterine perfusion pressure(RUPP) (n=3)...
April 3, 2018: European Journal of Histochemistry: EJH
Vittorio Farina, Gianluca Lepore, Francesca Biagi, Marcella Carcupino, Marco Zedda
A possible response to aging is autophagy, a self-digestion process in which portions of cytoplasm are encapsulated by double-membrane-bound structures and delivered to lysosome for degradation. A previous work of our group showed that astrocytes under starving conditions are characterized by a higher upregulation of the marker of autophagy LC3 II than neurons. Aim of the present work was to evaluate LC3 II expression in an aging model consisting in fetal sheep neurons and astrocytes at 10, 20 and 30 days of culture...
April 3, 2018: European Journal of Histochemistry: EJH
Silvia Damiana Visonà, Donatella Benati, Maria Cristina Monti, Mirco Galiè, Luisa Andrello, Andrea Frontini, Antonio Osculati
The aim of this post-mortem ultrastructural and immunohistochemical study is to explore the characteristics of acute myocardial ischemia in the context of sudden death, using the combination of two different methods, both more insightful than ordinary histology. Transmission electron microscope and immunohistochemistry, in addition to the traditional histology, were applied to study human heart specimens collected during forensic autopsies. The whole series was sub-grouped into cases (n=17) and controls (n=10)...
April 3, 2018: European Journal of Histochemistry: EJH
Valeriia Gusel'nikova, Olga Antimonova, Elena Fedorova, Mikhail Shavlovsky, Aleksandr Krutikov, Ekaterina Mikhailova, Aleksandra Gudkova, Vyacheslav Mikhailov, Dmitry Korzhevskii
Amyloidosis is a group of diseases that occurs when amyloid proteins are deposited in tissues and organs. The traditional way of identifying amyloid in tissue sections is staining with Congo red. However, this method has a number of limitations including background staining (background fluorescence), low fluorescence intensity and false-positive staining. Therefore, a complex of fluorescence-based methods should be applied to characterize tissue localization of amyloid deposits. The aim of this study was to identify amyloid deposits in the kidneys of dystrophin-deficient mdx mice using different fluorescent dyes...
April 3, 2018: European Journal of Histochemistry: EJH
Manuel Scimeca, Simone Bischetti, Harpreet Kaur Lamsira, Rita Bonfiglio, Elena Bonanno
The Energy Dispersive X-ray (EDX) microanalysis is a technique of elemental analysis associated to electron microscopy based on the generation of characteristic Xrays that reveals the presence of elements present in the specimens. The EDX microanalysis is used in different biomedical fields by many researchers and clinicians. Nevertheless, most of the scientific community is not fully aware of its possible applications. The spectrum of EDX microanalysis contains both semi-qualitative and semi-quantitative information...
March 15, 2018: European Journal of Histochemistry: EJH
Soledad Berríos, Raúl Fernández-Donoso, Jesús Page, Eliana Ayarza, Ernesto Capanna, Emanuela Solano, Riccardo Castiglia
The size and shape of the chromosomes, as well as the chromosomal domains that compose them, are determinants in the distribution and interaction between the bivalents within the nucleus of spermatocytes in prophase I of meiosis. Thus the nuclear architecture characteristic of the karyotype of a species can be modified by chromosomal changes such as Rb chromosomes. In this study we analysed the meiotic prophase nuclear organization of the heterozygous spermatocytes from Mus musculus domesticus 2n=26, and the synaptic configuration of the hexavalent formed by the dependent Rb chromosomes Rbs 6...
February 20, 2018: European Journal of Histochemistry: EJH
Simona Polakovičová, Mária Csöbönyeiová, Barbora Filova, Miroslav Borovský, Ladislav Maršík, Alena Kvasilová, Štefan Polák
Human Merkel cells (MCs) were first described by Friedrich S. Merkel in 1875 and named "Tastzellen" (touch cells). Merkel cells are primarily localized in the basal layer of the epidermis and concentrated in touch-sensitive areas. In our previous work, we reported on the distribution of MCs in the human esophagus, so therefore we chose other parts of the human body to study them. We selected the human vagina, because it has a similar epithelium as the esophagus and plays very important roles in reproduction and sexual pleasure...
February 16, 2018: European Journal of Histochemistry: EJH
Andrea Amaroli, Sara Ferrando, Marina Pozzolini, Lorenzo Gallus, Steven Parker, Stefano Benedicenti
Photobiomodulation (PBM) is a manipulation of cellular behavior using non-ablative low intensity light sources. This manipulation triggers a cascade of metabolic effects and physiological changes resulting in improved tissue repair, of benefit in the treatment of tissue injury, degenerative or autoimmune diseases. PBM has witnessed an exponential increase in both clinical instrument technology and applications. It is therefore of benefit to find reliable experimental models to test the burgeoning laser technology for medical applications...
February 9, 2018: European Journal of Histochemistry: EJH
Michelle Steicke, Guang Yang, Tam Nguyen Dinh, Matthew Dunster-Jones, Owen Sargisson, Farah Ahmady, Jonathan Golledge, Yutang Wang
Methanol, ethanol and formalin are commonly used as fixatives to preserve biological tissues from decay in the preparation of histological sections. Fixation of the inner layers of the tissue depends on the ability of the fixative to diffuse into the tissue. It is unknown whether methanol penetrates tissues at similar rates to other fixatives. This study aimed to compare the penetration rates of methanol, ethanol and formalin into bovine heart and liver tissues. The penetration distance and tissue shrinkage or expansion were measured by analysing the digital images of tissue before and after immersion in different fixatives for 1, 2, 6 or 10 h...
February 7, 2018: European Journal of Histochemistry: EJH
Yu Wang, Ziyi Wang, Wenyang Yu, Xia Sheng, Haolin Zhang, Yingying Han, Zhengrong Yuan, Qiang Weng
The reproductive tissues including the uterus undergo dramatic changes in seasonal breeders from the breeding to non-breeding seasons. Classically, sex steroid hormones play important roles in the uterine morphology and functions. To clarify the relationship between sex steroid hormones and seasonal changes in the uterine morphology and functions, the wild Daurian ground squirrels (Spermophilus dauricus) were used as seasonal breeder model. And the immunolocalizations and expression levels of androgen receptor (AR), estrogen receptors α and β (ERα and ERβ) and cytochrome P450 aromatase (P450arom) were investigated in the uteri of the wild Daurian ground squirrels in the breeding (April) and the non-breeding (June) seasons via immunohistochemistry, Western blot and RT-PCR...
February 7, 2018: European Journal of Histochemistry: EJH
Ilen Röhe, Friedrich Joseph Hüttner, Johanna Plendl, Barbara Drewes, Jürgen Zentek
The histological characterization of the intestinal mucus layer is important for many scientific experiments investigating the interaction between intestinal microbiota, mucosal immune response and intestinal mucus production. The aim of this study was to examine and compare different fixation protocols for displaying and quantifying the intestinal mucus layer in piglets and to test which histomorphological parameters may correlate with the determined mucus layer thickness. Jejunal and colonal tissue samples of weaned piglets (n=10) were either frozen in liquid nitrogen or chemically fixed using methacarn solution...
February 5, 2018: European Journal of Histochemistry: EJH
Elena Antonini, Carolina Zara, Laura Valentini, Pietro Gobbi, Paolino Ninfali, Michele Menotta
In this study, we applied Environmental Scanning Electron Microscopy-Energy Dispersive Spectroscopy (ESEM-EDS) and Atomic Force Microscopy (AFM) analysis to three different cereal caryopses: barley, oat and einkorn wheat. The morphological structures, chemical elemental composition and surface characteristics of the three cereals were described. Regarding the morphology, barley showed the thickest pericarp, providing a strong barrier digestion and absorption of nutrients. The aleurone layer of each cereal type contained protein body globoids within its cells...
February 5, 2018: European Journal of Histochemistry: EJH
Bita Moudi, Zahra Heidari, Hamidreza Mahmoudzadeh-Sagheb, Seyed-Moayed Alavian, Kamran B Lankarani, Parisa Farrokh, Jens Randel Nyengaard
Hepatocellular carcinoma is the third leading cause of cancer-related death worldwide and late diagnosis is the main cause of death in HCC patients. In this study expression patterns of HSP70, GPC3 and GS and their relationships with pathogenesis of HCC in Iranian patients were investigated. The expression of HSP70, GPC3 and GS were determined by immunohistochemistry and quantitative real-time PCR (q-PCR) methods, using 121 cases from patients with HBV alone, HCC without HBV, HBV+HCC and 30 normal tissues as control group...
January 29, 2018: European Journal of Histochemistry: EJH
Jana Oswald, Maximilian Büttner, Simon Jasinsky-Bergner, Roland Jacobs, Philip Rosenstock, Heike Kielstein
Hyperleptinemia, associated with obesity, is related with immune dysfunction and carcinogenesis. Natural Killer (NK) cells, a major component of the innate immune system are mediators of anti-tumor immunity and the most actively migrating cells among leukocytes. Actin rearrangement, promoted by cofilin plays a central role in cellular migration. Leptin affects the phosphorylation-dependent activity of cofilin and thus actin remodeling. We used human NK-92 cells to explore the in vitro effects of leptin on co-localization of cofilin and F-actin and on morphological changes in NK cells...
January 26, 2018: European Journal of Histochemistry: EJH
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