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Histology and Histopathology

Virgilijus Uloza, Alina Kuzminienė, Jolita Palubinskienė, Ingrida Balnytė, Ingrida Ulozienė, Angelija Valančiūtė
We aimed to develop a chick embryo chorioallantoic membrane (CAM) model of recurrent respiratory papilloma (RPP) and to evaluate its morphological and morphometric characteristics, together with angiogenic features. Fresh RRP tissue samples obtained from 13 patients were implanted in 174 chick embryo CAMs. Morphological, morphometric, and angiogenic changes in the CAM and chorionic epithelium were evaluated up until 7 days after the implantation. Immunohistochemical analysis (34βE12, Ki-67, MMP-9, PCNA, and Sambucus nigra staining) was performed to detect cytokeratins and endothelial cells and to evaluate proliferative capacity of the RRP before and after implantation on the CAM...
October 10, 2016: Histology and Histopathology
Bruna Corominas-Faja, Luciano Vellon, Elisabet Cuyàs, Maria Buxó, Begoña Martin-Castillo, Dolors Serra, Jordi García, Javier A Menendez, Ruth Lupu
Fatty acid synthase (FASN) is a key lipogenic enzyme for de novo fatty acid biosynthesis and a druggable metabolic oncoprotein that is activated in most human cancers. We evaluated whether the HER2-driven lipogenic phenotype might represent a biomarker for sensitivity to pharmacological FASN blockade. A majority of clinically HER2-positive tumors were scored as FASN overexpressors in a series of almost 200 patients with invasive breast carcinoma. Re-classification of HER2-positive breast tumors based on FASN gene expression predicted a significantly inferior relapse-free and distant metastasis-free survival in HER2+/FASN+ patients...
October 7, 2016: Histology and Histopathology
Slavica Juric Petricevic, Antonia Pavlovic, Vesna Capkun, Kristijan Becic, Merica Glavina Durdov
Introduction Melanoma of the skin shows a tendency to metastasize via lymph or blood secreting matrix metalloproteinases and cathepsins, which enable penetration through the dermis. Cathepsin K acts in cytoplasm of atypical melanocytes and completely cleaves internalized collagen. Materials and methods Expression of cathepsin K was analyzed immunohistochemically in 45 melanomas and correlated to morphological and clinical parameters. Results During six years follow up, 13 patients developed lymph node metastases and three of them distant metastases...
October 6, 2016: Histology and Histopathology
Aleksandra Velickov, Olivera Mitrovic, Branka Djordjevic, Dusan Sokolovic, Vladimir Zivkovic, Asen Velickov, Vukica Pantovic, Natasa Poklar Urlih, Goran Radenkovic
Diabetic gastroenteropathy involves not only the parasympathetic and sympathetic autonomic nerves, but also enteric neurons, smooth muscle cells and interstitial cells of Cajal (ICC). ICC are the cells of mesenchymal origin that occur within and around the muscle layers in the gastrointestinal tract. The objective of the present study was to investigate the alterations of ICC in the lower oesophageal sphincter (LOS) of streptozotocin-nicotinamide non-insulin-dependent diabetes rats. Moreover, we investigated possible ICC in rats with the same type of diabetes, treated with bilberry fruit extract, bearing in mind that its hypoglycemic effect had been already proven...
October 5, 2016: Histology and Histopathology
Pedro Hernández-Cortés, Miguel Angel Toledo-Romero, Mario Delgado, Elena Gonzalez-Rey, Rafael Gómez Sánchez, Nicolás Prados, José Aneiros-Fernández, Vicente Crespo-Lora, Mariano Aguilar, Pablo Galindo-Moreno, Francisco O'Valle
OBJECTIVE: Attempts have been made to improve nerve conduits in peripheral nerve reconstruction. We investigated the potential therapeutic effect of adipose-derived mesenchymal cells (ASCs) and ghrelin (GHR), a neuropeptide with neuroprotective, trophic, and developmental regulatory actions, on peripheral nerve regeneration in a model of severe nerve injury repaired with nerve conduits. MATERIAL AND METHODS: The right sciatic nerves of 24 male Wistar rats were 10-mm transected unilaterally and repaired with Dl-lactic-ε-caprolactone conduits...
September 30, 2016: Histology and Histopathology
Se-Jin Jeong, Chang-Jin Jeon
The purpose of this study was to determine whether the superior colliculus (SC) of the microbat has the same neurochemical makeup as that of other mammals. We examined the organization of choline acetyltransferase (ChAT)- and tyrosine hydroxylase-immunoreactive (TH-IR) fibers/cells using standard immunohistochemistry with antibodies against ChAT and TH. ChAT-IR fibers observed in the superficial layers were denser than those in the deeper layers, and these fibers were classified into two types: small varicose fibers and large varicose fibers...
September 29, 2016: Histology and Histopathology
Haseeb A Khan, Khalid E Ibrahim, Ayaat Khan, Salman H Alrokayan, Abdullah S Alhomida
Recently, gold nanoparticles (GNPs) have shown promising applications in targeted drug delivery and contrast imaging. Although in vitro cytotoxicity of GNPs has been thoroughly studied, there are limited data on in vivo toxicity of GNPs. In this study, we evaluated the effects of intraperitoneally injected 10 nm and 50 nm GNPs (5 μg/animal) on the expression of proinflammatory cytokines (IL-1β, IL-6 and TNF-α) on day 1 and day 5, post-exposure. The results of immunohistochemistry showed that both 10 nm and 50 nm GNPs induced an acute phase expression of proinflammatory cytokines in renal cortex and medulla...
September 28, 2016: Histology and Histopathology
Tsubasa Hiraki, Sohsuke Yamada, Michiyo Higashi, Kazuhito Hatanaka, Seiya Yokoyama, Ikumi Kitazono, Yuko Goto, Mari Kirishima, Surinder K Batra, Suguru Yonezawa, Akihide Tanimoto
Mucins play pivotal roles in influencing cancer biology, for example affecting carcinoma invasion, aggressiveness and/or metastatic potential. Our aim is to investigate the significance of expression profiles of two mucins in particular, MUC1 and MUC2, their correlations with various clinicopathological features, and prognosis in gallbladder adenocarcinoma (GBAC). We performed immunohistochemistry from patients with surgically resected GBAC, using antibodies against mucin core proteins MUC1/DF3 and MUC2/Ccp58 in 81 paraffin-embedded tumor samples...
September 27, 2016: Histology and Histopathology
Gozde Unek, Asli Ozmen, Bekir Sitki Isenlik, Emin T Korgun
The placenta, which is a regulator organ for many metabolic activities between mother and fetus, is critical in influencing the outcome of pregnancy. Therefore, fetal growth is directly related to the placental development. Placental development depends on the coordinated action of trophoblast proliferation, differentiation and invasion. Studies on cell cycle related proteins that control these events are limited. Abnormal placental development is linked to various pregnancy pathologies such as preeclampsia, intrauterine growth restriction, diabetes mellitus and gestational trophoblastic diseases...
September 26, 2016: Histology and Histopathology
Sergio Almenar-Medina, Brenda Palomar-De Lucas, Ester Guerrero-Albors, Amparo Ruiz-Sauri
Conventional models of liver microanatomy assume the presence of subunits. Nevertheless, some researchers propose that the liver is a continuous structure, free of these subunits, but with a characteristic vascular pattern. The present study describes a morphometric analysis of portal and hepatic veins in 50 human autopsy non-pathological liver samples. The main objective was to measure three proportions: 1. portal tracts / hepatic veins, 2. distributing portal veins / distributing hepatic veins and 3. terminal portal veins / terminal hepatic veins...
September 23, 2016: Histology and Histopathology
Shinji Kamiya, Hisashi Yoshimura, Keina Okada, Aayaka Yoshida, Yuki Fukuda, Masami Yamamoto, Satoshi Soeta, Kimimasa Takahashi
Polyglucosan bodies (PGB) in the prostate of aged dogs without neurological signs were examined by light microscopy, histochemistry and immunohistochemistry. Prostatic PGB were round or oval and slightly basophilic. Most of the bodies were situated within the stromal smooth muscle cells. PGB were intensely positive for PAS, Best's carmine, Lugol's iodine and Grocott's methenamine silver method. Moreover, canine prostatic PGB were immunoreactive for monoclonal antibodies raised against human polyglucosan. The frequency of PGB in the smooth muscle cells was significantly correlated with the age of dogs...
September 22, 2016: Histology and Histopathology
Shudong Gu, Jia Feng, Qin Jin, Wei Wang, Shu Zhang
Colorectal carcinoma (CRC) is the third most common cancer and a major cause of morbidity and mortality throughout the world. The prognosis of patients has improved markedly over the last 15 years because of the introduction of new therapy including molecular target drugs. To comprehensively understand the molecular process of carcinogenesis of colorectal carcinoma is essential for the diagnosis, prognosis and treatment. EphA5 is a member of the Eph family and plays a critical role in carcinogenesis of lung cancer, prostate cancer, and breast cancer...
September 21, 2016: Histology and Histopathology
Jin-Sil Park, Sung-Min Kim, Kyung-Ah Jung, Jennifer Lee, Seung-Ki Kwok, Mi-La Cho, Sung-Hwan Park
Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) is a proinflammatory cytokine that is involved in pathogenesis of abnormal or disregulated inflammation. To verify how TWEAK/fibroblast growth factor-inducible gene 14 (Fn14) signals affect development of Th17 cells in arthritis, we utilized the SKG mouse, which spontaneously develops Th17-mediated autoimmune arthritis. Fn14-Fc was administered to zymosan A-induced arthritogenic SKG mice, and the effects in vivo were examined. Destruction of cartilage and bone damage was assessed by Hematoxylin and Eosin, and safranin O staining of the affected tissues...
September 20, 2016: Histology and Histopathology
Lijia Guo, Luyuan Jin, Juan Du, Chunmei Zhang, Zhipeng Fan, Songlin Wang
The aim of this study was to investigate the biological function of SHANK2 on the osteo/dentinogenic differentiation potentials of human stem cells from apical papilla (SCAPs). Real-time RT-PCR was used to detect the expression of SHANK2 in human mesenchymal stem cells (MSCs). Small hairpin RNA (shRNA) was used to knockdown the SHANK2 in SCAPs. The knockdown efficiency was determined by real-time RT-PCR and Western Blot. The in vitro osteo/dentinogenic differentiation potentials of SCAPs were investigated using ALP staining, ALP activity, alizarin red staining, quantitative calcium, the expression levels of DSPP, DMP1, RUNX2 and OSX...
September 19, 2016: Histology and Histopathology
Desanka Výbohová, Katarína Adamicová, Yvetta Mellová, Gabriela Hešková
Epidermal proliferation, inflammatory changes and microvascular augmentation are prominent features of chronic cutaneous psoriatic lesions. The objective of this study was the investigation of blood and lymphatic microvascular changes in relation to epidermal changes and inflammatory infiltration in dermis. Immunohistochemical analysis with antibodies to CD34, podoplanin, vascular endothelial growth factors - A and C (VEGF-A and C) and morphometric software were used for quantification of the following parameters: blood and lymphatic vessel area (BVA and LVA), VEGF - A and VEGF-C positive area, inflammatory cell infiltration in dermis (CIA) and epidermal area (EA)...
September 16, 2016: Histology and Histopathology
Giuseppe Pelosi, Linda Pattini, Giovanni Morana, Alessandra Fabbri, Alex Faccinetto, Nicola Fazio, Barbara Valeri, Angelica Sonzogni
BACKGROUND: Pathological grading of tumors is a way to measure biological aggressiveness. In lung neuroendocrine tumors (NET), grading is tautologically included into the current 2015 WHO histologic classification. Little is known, however, about alternative grading systems in lung NET. METHODS: Through an extensive search of the English literature on lung NET (updated to April 2016), the following key questions were addressed: a) current concepts of grading; b) clinicians' requests for grading; c) functional parameters for grading; d) Ki-67 labeling index (LI) for grading; e) towards an effective pathology grading system...
September 15, 2016: Histology and Histopathology
Thanushiyan Poobalasingam, David Salman, Henry Li, Joana Alçada Costa, Charlotte H Dean
Our understanding of lung biology can be greatly enhanced by studying embryonic and postnatal lung development, and the perturbations which occur during disease. Imaging techniques provide a unique insight into these processes. A wide variety of imaging techniques have been used to study the lungs at various stages of development and disease, ranging from histological stains to more novel techniques such as single plane illumination microscopy (SPIM), intravital microscopy (IVM), and micro-computed tomography (micro-CT)...
September 14, 2016: Histology and Histopathology
Ryoji Yoshida, Takaaki Ito, Wael Abdo Hassan, Hideki Nakayama
Notch signaling has been reported to be involved in several types of malignant tumors. However, the role and activation mechanisms of Notch signaling in oral squamous cell carcinoma (OSCC) remain poorly characterized. The present review focuses on the dual role of Notch signaling in OSCC. A number of expression and functional analyses demonstrated that Notch1 plays a crucial role in development and progression of OSCC. On the other hand, a tumor suppressive role of Notch1 was also suggested from studies, based on deep sequencing of cancer genomes...
September 12, 2016: Histology and Histopathology
Atsuko Kimura, Kazuhiko Namekata, Xiaoli Guo, Chikako Harada, Takayuki Harada
Glaucoma is a neurodegenerative disease of the eye and it is one of the major causes of blindness. Glaucoma is usually associated with elevated intraocular pressure (IOP) and the current therapy focuses on reduction of IOP. However, neuroprotective strategies could also be beneficial for treatment of glaucoma because the pathology of the disease involves retinal ganglion cell (RGC) death and damage to the optic nerve. Dedicator of cytokinesis 3 (Dock3) is an atypical guanine exchange factor (GEF) that belongs to a family of Dock proteins, Dock1-11...
September 9, 2016: Histology and Histopathology
Shuai Jia, Wangdong Zhang, Xuefen Tan, Wanhong He, Wenhui Wang
Secretory immunoglobulin A (SIgA) antibody-secreting cells (ASCs) are the major effector cells of mucosal immunity, and immunoglobulin G (IgG) ASCs are also associated with mucosal immunity. This study aimed to explore the distribution of these 2 ASC populations in the palatine tonsils of Bactrian camels of different ages. Eighteen Bactrian camels were divided into the following three age groups: pubertal (3-5 years), middle-aged (6-16 years) and old (17-20 years). SIgA and IgG ASCs within different sites of the palatine tonsils were observed through histological and immunohistochemical techniques, and their densities were analyzed using statistical methods...
September 8, 2016: Histology and Histopathology
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