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https://www.readbyqxmd.com/read/27916624/primary-paranasal-sinus-clear-cell-carcinoma-with-ewsr1-atf1-fusion-report-of-two-molecularly-confirmed-cases-exhibiting-unique-histopathology
#1
Jui Lan, Shun-Chen Huang, Yi-Hsien Chen, Wei-Chih Chen, Ying-Tai Jin, Ying-Chou Lu, Chih-Yen Chien, Hsuan-Ying Huang
Hyalinizing clear cell carcinoma (HCCC) is a rare low-grade tumor of the salivary glands made up of clear cells that form cords and nests in hyalinized stroma. To date, primary HCCCs of the paranasal sinus have not been described. This article presents two cases of HCCC of the maxillary sinus with unusual glandular formation and lymphoplasmacytic stroma in Case 1 and a characteristic solid nest pattern and fibrocellular and hyalinized stroma in Case 2. Immunohistochemical studies excluded myoepithelial origin and sinonasal renal cell-like adenocarcinomas...
December 1, 2016: Human Pathology
https://www.readbyqxmd.com/read/27914026/limbal-stem-cell-and-oral-mucosal-epithelial-transplantation-from-ex-vivo-cultivation-in-lscd-induced-rabbits-histology-and-immunologic-study-of-the-transplant-epithelial-sheet
#2
Napaporn Tananuvat, Kanokkan Bumroongkit, Chainarong Tocharusa, Umnat Mevatee, Aphisek Kongkaew, Somsanguan Ausayakhun
PURPOSE: To evaluate the results of cultivated limbal epithelial and oral mucosal epithelial transplantation (CLET and COMET) in limbal stem cell deficiency (LSCD)-induced rabbit model. MATERIALS AND METHODS: Six New Zealand white rabbits were divided into two groups of three rabbits each. Limbal tissue was harvested from the first group, and oral mucosal biopsy was obtained from the second group. The tissues were cultured using an explant technique with amniotic membrane as a substrate and co-culture with the 3T3 fibroblast and air-lifting method...
December 2, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27911610/successful-consecutive-expansion-of-limbal-explants-using-a-biosafe-culture-medium-under-feeder-layer-free-conditions
#3
Marina López-Paniagua, Teresa Nieto-Miguel, Ana de la Mata, Sara Galindo, José M Herreras, Rosa M Corrales, Margarita Calonge
PURPOSE: Transplantation of in vitro cultured limbal epithelial stem cells (LESCs) is a treatment widely used for LESC deficiency. However, the number of limbal tissue donors is limited, and protocols for LESC cultivation often include compounds and/or feeder layers that can induce side effects and/or increase the cost of the culture procedure. We investigated the feasibility of obtaining more than one limbal primary culture (LPC) from the same biopsy using a culture medium in which several potentially harmful compounds were replaced at the same time by biosafe supplements, allowing the LESC cultivation without feeder layers...
December 2, 2016: Current Eye Research
https://www.readbyqxmd.com/read/27910944/thyroid-sclerosing-mucoepidermoid-carcinoma-with-eosinophilia-a-clinicopathologic-and-molecular-analysis-of-a-distinct-entity
#4
Akeesha A Shah, Kristin La Fortune, Caitlyn Miller, Stacey E Mills, Zubair Baloch, Virginia LiVolsi, Sanja Dacic, Alyssa L Mahaffey, Marina Nikiforova, Yuri E Nikiforov, Raja R Seethala
Sclerosing mucoepidermoid carcinoma with eosinophilia is a rare thyroid neoplasm of uncertain pathogenesis that resembles salivary gland mucoepidermoid carcinoma. This multi-institutional study characterizes the clinicopathologic and molecular features of this tumor by utilizing next-generation sequencing to assess common mutations and gene fusions involved in thyroid carcinogenesis as well as fluorescence in-situ hybridization for MAML2 translocations typical of salivary gland mucoepidermoid carcinoma. Nine cases (6 females and 3 males, mean age: 59 years, range 30-77 years) were identified...
December 2, 2016: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/27898472/a-case-of-trichogerminoma-with-pilomatrical-differentiation-and-a-unique-immunohistochemical-profile
#5
Jonathan Epperson, Lester Libow
Trichogerminomas are rare adnexal neoplasms first described by Sau et al in 1992. Including the initial report, 20 cases have been reported, all with similar histological features, namely tumor nodules composed of basaloid cells that form densely packed, round nests or "cell balls" and which demonstrate variable degrees of pilosebaceous differentiation. In this study, the authors report a case of a trichogerminoma with pilomatrical differentiation and a unique immunohistochemical profile. The patient is a 71-year-old man with a well-delineated nodule on the top of the scalp...
November 21, 2016: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/27894087/negative-feedback-between-tap63-and-mir-133b-mediates-colorectal-cancer-suppression
#6
Jing Dai, Hao Wu, Yi Zhang, Kai Gao, Gui Hu, Yihang Guo, Changwei Lin, Xiaorong Li
BACKGROUND: TAp63 is known as the most potent transcription activator and tumor suppressor. microRNAs (miRNAs) are increasingly recognized as essential components of the p63 pathway, mediating downstream post-transcriptional gene repression. The aim of present study was to investigate a negative feedback loop between TAp63 and miR-133b. RESULTS: Overexpression of TAp63 inhibited HCT-116 cell proliferation, apoptosis and invasion via miR-133b. Accordingly, miR-133b inhibited TAp63 expression through RhoA and its downstream pathways...
November 23, 2016: Oncotarget
https://www.readbyqxmd.com/read/27889317/the-p53-family-coordinates-wnt-and-nodal-inputs-in-mesendodermal-differentiation-of-embryonic-stem-cells
#7
Qiong Wang, Yilong Zou, Sonja Nowotschin, Sang Yong Kim, Qing V Li, Chew-Li Soh, Jie Su, Chao Zhang, Weiping Shu, Qiaoran Xi, Danwei Huangfu, Anna-Katerina Hadjantonakis, Joan Massagué
In this study, we outline a regulatory network that involves the p53 tumor suppressor family and the Wnt pathway acting together with the TGF-β pathway in mesendodermal differentiation of mouse and human embryonic stem cells. Knockout of all three members, p53, p63, and p73, shows that the p53 family is essential for mesendoderm specification during exit from pluripotency in embryos and in culture. Wnt3 and its receptor Fzd1 are direct p53 family target genes in this context, and induction of Wnt signaling by p53 is critical for activation of mesendodermal differentiation genes...
November 9, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27889037/pathology-of-anal-cancer
#8
REVIEW
Paulo M Hoff, Renata Coudry, Camila Motta Venchiarutti Moniz
Anal canal cancer is rather an uncommon disease but its incidence is increasing. Squamous cell carcinoma (SCC) is the most frequent primary anal neoplasm and can encompass a variety of morphologies. HPV infection has a key role in precancerous lesions and cancer development by the production of E6 and E7 oncoproteins. Anal squamous precancerous lesions are now classified according to the same criteria and terminology as their cervical counterparts. The p16 expression by immunohistochemistry is a surrogate marker for human papilloma virus (HPV)...
January 2017: Surgical Oncology Clinics of North America
https://www.readbyqxmd.com/read/27884017/the-p53-family-orchestrates-the-regulation-of-metabolism-physiological-regulation-and-implications-for-cancer-therapy
#9
Marco Napoli, Elsa R Flores
The p53 family of transcription factors is essential to counteract tumour formation and progression. Although previously this was exclusively associated with the ability of the p53 family to induce cell cycle arrest and apoptosis, an increasing number of reports have now indisputably demonstrated that the tumour suppressive functions of the p53 family members also rely on their ability to control and regulate cellular metabolism and maintain cellular oxidative homeostasis. Here, we review how each p53 family member, including p63 and p73, controls metabolic pathways in physiological conditions, and how these mechanisms could be exploited to provide anticancer therapeutic opportunities...
November 24, 2016: British Journal of Cancer
https://www.readbyqxmd.com/read/27875772/hnf4%C3%AE-is-a-key-gene-that-can-generate-columnar-metaplasia-in-oesophageal-epithelium
#10
Benjamin J Colleypriest, Zoë D Burke, Leonard P Griffiths, Yu Chen, Wei-Yuan Yu, Ramiro Jover, Michael Bock, Leigh Biddlestone, Jonathan M Quinlan, Stephen G Ward, J Mark Farrant, Jonathan M W Slack, David Tosh
Barrett's metaplasia is the only known morphological precursor to oesophageal adenocarcinoma and is characterized by replacement of stratified squamous epithelium by columnar epithelium. The cell of origin is uncertain and the molecular mechanisms responsible for the change in cellular phenotype are poorly understood. We therefore explored the role of two transcription factors, Cdx2 and HNF4α in the conversion using primary organ cultures. Biopsy samples from cases of human Barrett's metaplasia were analysed for the presence of CDX2 and HNF4α...
November 19, 2016: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/27871860/in%C3%A2-vitro-reconstitution-of-breast-cancer-heterogeneity-with-multipotent-cancer-stem-cells-using-small-molecules
#11
Masaki Kawamata, Takeshi Katsuda, Yasuhiro Yamada, Takahiro Ochiya
A small fraction of tumor cells are thought to possess the potential for both multiple-lineage differentiation and self-renewal, which underlies the cancer stem cell hypothesis. However, the differentiation mechanisms of these cells have not been elucidated due to a lack of appropriate culture methods. Here, we established a culture condition for maintaining multipotent tumor cells from rat breast tumors using 4 small molecules. Cultured tumor cells in this condition retained their intrinsic myoepithelial features, expressing p63 and CK14 and vimentin...
November 18, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27870215/detangling-the-evolutionary-developmental-integration-of-dentate-jaws-evidence-that-a-p63-gene-network-regulates-odontogenesis-exclusive-of-mandible-morphogenesis
#12
Muhammad T Raj, Julia C Boughner
Vertebrate jaws and dentitions fit and function together, yet the genetic processes that coordinate cranial and dental morphogenesis and evolution remain poorly understood. Teeth but not jaws fail to form in the edentate p63(-/-) mouse mutant, which we used here to identify genes important to odontogenesis, but not jaw morphogenesis, and that may allow dentitions to change during development and evolution without necessarily affecting the jaw skeleton. With the working hypothesis that tooth and jaw development are autonomously controlled by discreet gene regulatory networks, using gene expression microarray assays validated by quantitative reverse-transcription PCR we contrasted expression in mandibular prominences at embryonic days (E) 10-13 of mice with normal lower jaw development but either normal (p63(+/-) , p63(+/+) ) or arrested (p63(-/-) ) tooth development...
December 2016: Evolution & Development
https://www.readbyqxmd.com/read/27869449/-diffuse-tenosynovial-giant-cell-tumor-of-the-cervical-spine-destroying-vertebra-c6-a%C3%A2-case-report
#13
Zdeněk Kinkor, Tomáš Svoboda, Petr Grossman, David Bludovský, Filip Heidenreich, Andrej Švec, Iveta Mečiarová
Presented is a case of 59-year-old woman with longstanding neck pain who has been promptly operated for spinal cord compression. Imaging studies disclosed ill-defined cervical paravertebral soft tissue mass at the level of vertebra C5/6 abutting left-sided intervertebral joint and destroying neighboring both vertebral arch and processus spinosus. Submitted specimen was interpreted as a possible metastatic skeletal process by clinicians and referring pathologist favored diagnosis of giant cell tumor/osteoclastoma of the bone...
2016: Ceskoslovenská Patologie
https://www.readbyqxmd.com/read/27869165/tap63-suppresses-mammary-tumorigenesis-through-regulation-of-the-hippo-pathway
#14
X Su, M Napoli, H A Abbas, A Venkatanarayan, N H B Bui, C Coarfa, Y J Gi, F Kittrell, P H Gunaratne, D Medina, J M Rosen, F Behbod, E R Flores
Mechanisms regulating the transition of mammary epithelial cells (MECs) to mammary stem cells (MaSCs) and to tumor-initiating cells (TICs) have not been entirely elucidated. The p53 family member, p63, is critical for mammary gland development and contains transactivation domain isoforms, which have tumor-suppressive activities, and the ΔN isoforms, which act as oncogenes. In the clinic, p63 is often used as a diagnostic marker, and further analysis of the function of TAp63 in the mammary gland is critical for improved diagnosis and patient care...
November 21, 2016: Oncogene
https://www.readbyqxmd.com/read/27862636/a-novel-method-for-a-high-enrichment-of-human-corneal-epithelial-stem-cells-for-genomic-analysis
#15
Jhansi Rani Kasinathan, Venkatesh Prajna Namperumalsamy, Muthukkaruppan Veerappan, Gowri Priya Chidambaranathan
Understanding the molecular mechanisms that regulate the corneal epithelial stem cells (CESCs) in maintaining corneal homeostasis remains elusive largely due to the lack of a specific marker for their isolation. This study aims to enrich CESCs from human donor limbal epithelium and to evaluate the level of enrichment based on expression of ΔNp63α, a putative CESC marker. A two-stage enrichment of CESCs was carried out. (a) The limbal basal epithelial cells were isolated by differential enzymatic treatment and five-fold enrichment was achieved from 2% of CESCs present in the total limbal epithelium...
December 2016: Microscopy Research and Technique
https://www.readbyqxmd.com/read/27859961/minimum-apparent-diffusion-coefficient-for-predicting-lymphovascular-invasion-in-invasive-cervical-cancer
#16
Wei Yang, Jin Wei Qiang, Hai Ping Tian, Bing Chen, Ai Jun Wang, Jian Guo Zhao
PURPOSE: To investigate the diagnostic performance of minimum apparent diffusion coefficient (mini-ADC) for predicting lymphovascular invasion (LVI) in invasive cervical cancer. MATERIALS AND METHODS: Ninety-six patients with pathologically confirmed invasive cervical cancer (CC) underwent conventional preoperative magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) on a 3.0T MRI system. Tumor ADC, mini-ADC and mini-ADC ratio (mini-ADC value / tumor ADC value) were obtained and compared between LVI-positive and LVI-negative invasive CC, and correlation between LVI status and Ki-67, p16, p63, and clinical prognostic factors were analyzed...
November 8, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27852932/epididymis-like-tubules-in-adult-renal-hypodysplasia-immunohistochemical-features-indicate-a-mesonephric-origin
#17
Madhavi A Naik, Sanjay A Pai
We report the presence of epididymis-like tubules in unilateral renal hypodysplasia in 3 adult men. Microscopy showed dilated tubules lined by ciliated columnar epithelium and smaller basal cells, morphologically resembling epididymal tubules. Small tubules lined by cuboidal epithelium were also present in all cases, with glomeruli in 2 cases. The epididymis-like tubules expressed CD10, CK7, PAX8, and AR in the luminal epithelium, while the basal cells were positive for p63, CK7, and focally for CD10. The smooth muscle bundles around the epididymis-like tubules were focally AR and WT1 (cytoplasmic) positive...
November 16, 2016: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/27849611/notch1-controls-development-of-the-extravillous-trophoblast-lineage-in-the-human-placenta
#18
Sandra Haider, Gudrun Meinhardt, Leila Saleh, Christian Fiala, Jürgen Pollheimer, Martin Knöfler
Development of the human placenta and its different epithelial trophoblasts is crucial for a successful pregnancy. Besides fusing into a multinuclear syncytium, the exchange surface between mother and fetus, progenitors develop into extravillous trophoblasts invading the maternal uterus and its spiral arteries. Migration into these vessels promotes remodelling and, as a consequence, adaption of blood flow to the fetal-placental unit. Defects in remodelling and trophoblast differentiation are associated with severe gestational diseases, such as preeclampsia...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27833978/primary-squamous-cell-carcinoma-of-the-thyroid-a-case-report
#19
Corina Lichiardopol, Valeriu Şurlin, Maria Camelia Foarfă, Mirela Corina Ghiluşi, Simona Bondari
Primary squamous cell carcinoma of the thyroid is a very rare thyroid malignancy (less than 1% of thyroid cancers) with unfavorable clinical evolution and median survival less than one year, due to highly local tumor invasiveness with airway obstruction, metastases and treatment complications. We present a 62-year-old female patient with a fixed, rapidly increasing 5 cm right thyroid nodule, generating compressive signs and significant weight loss, resembling anaplastic thyroid carcinoma. Thyroid hormones, antithyroid antibodies and calcitonin were normal...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27824965/hashimoto-s-thyroiditis-and-papillary-thyroid-carcinoma-are-cytokeratin-19-and-p63-proteins-of-any-diagnostic-value
#20
Smaroula N Divani, George P Kalodimos, Matteo A Lioupis, Nikolaos Ch Syrmos
BACKGROUND: The relation between Hashimoto's thyroiditis (HT) and papillary thyroid carcinoma (PTC) remains controversial. We aimed to study the coexistence of PCT and HT and the diagnostic utility of cytokeratin19 and P63 proteins expression in all positive for PTC cases of HT. SUBJECTS AND METHODS: We analyzed data from 343 patients who underwent fine needle aspiration cytology followed by thyroid surgery over a six years period. Thyroid scans and blood measurements for anti-thyroid peroxidase antibodies (TPOAb), thyroid stimulating hormone (TSH), anti-thyroglobulin antibodies (TgAb) and free thyroid hormones were performed...
November 8, 2016: Hellenic Journal of Nuclear Medicine
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