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Luciana Teixeira de Siqueira, Marcela Silvestre Outtes Wanderley, Roberto Afonso da Silva, Adriana da Silva Andrade Pereira, José Luiz de Lima Filho, Álvaro Antônio Bandeira Ferraz
BACKGROUND: Obesity has been associated with the development of various types of cancer. Biomarker studies may provide molecular level knowledge of the factors involved in this association, improving clinical practice through new methods of prevention and treatment. PURPOSE: The present study aimed to analyze proteins found in the plasma of obese patients prior to and 6 months after bariatric surgery, using body mass index (BMI) and percentage total weight loss (%TWL) to evaluate, in a prospective manner, the effects of weight loss on the regulation of proteins related to the appearance of tumors...
March 10, 2018: Obesity Surgery
Shoko Nakasone, Sachiyo Mimaki, Tomohiro Ichikawa, Keiju Aokage, Tomohiro Miyoshi, Masato Sugano, Motohiro Kojima, Satoshi Fujii, Takeshi Kuwata, Atsushi Ochiai, Masahiro Tsuboi, Koichi Goto, Katsuya Tsuchihara, Genichiro Ishii
PURPOSE: Podoplanin-positive cancer-associated fibroblasts (CAFs) play an essential role in tumor progression. However, it is still unclear whether specific genomic alterations of cancer cells are required to recruit podoplanin-positive CAFs. The aim of this study was to investigate the relationship between the mutation status of lung adenocarcinoma cells and the presence of podoplanin-positive CAFs. METHODS: Ninety-seven lung adenocarcinomas for which whole exome sequencing data were available were enrolled...
March 6, 2018: Journal of Cancer Research and Clinical Oncology
Edward P Retzbach, Stephanie A Sheehan, Evan M Nevel, Amber Batra, Tran Phi, Angels T P Nguyen, Yukinari Kato, Soly Baredes, Mahnaz Fatahzadeh, Alan J Shienbaum, Gary S Goldberg
Oral cancer has become one of the most aggressive types of cancer, killing 140,000 people worldwide every year. Current treatments for oral cancer include surgery and radiation therapies. These procedures can be very effective; however, they can also drastically decrease the quality of life for survivors. New chemotherapeutic treatments are needed to more effectively combat oral cancer. The transmembrane receptor podoplanin (PDPN) has emerged as a functionally relevant oral cancer biomarker and chemotherapeutic target...
March 2018: Oral Oncology
Rebecca M Izen, Tomoko Yamazaki, Yoko Nishinaka-Arai, Young-Kwon Hong, Yoh-Suke Mukouyama
BACKGROUND: Traditionally, the central nervous system (CNS) has been viewed as an immune-privileged environment with no lymphatic vessels. This view was partially overturned by the discovery of lymphatic vessels in the dural membrane that surrounds the brain, in contact with the interior surface of the skull. We here examine the distribution and developmental timing of these lymphatic vessels. RESULTS: Using the Prox1-GFP BAC transgenic reporter and immunostaining with antibodies to lymphatic markers LYVE-1, Prox1, and Podoplanin, we have carried out whole-mount imaging of dural lymphatic vasculature at postnatal stages...
March 1, 2018: Developmental Dynamics: An Official Publication of the American Association of Anatomists
Tomoyuki Sasaki, Toshiaki Shirai, Nagaharu Tsukiji, Shimon Otake, Shogo Tamura, Jiro Ichikawa, Makoto Osada, Kaneo Satoh, Yukio Ozaki, Katsue Suzuki-Inoue
BACKGROUND: Rhodocytin, a disulfide-linked heterodimeric C-type lectin consisting of α- and β-subunits from Calloselasma rhodostoma, induces platelet aggregation through C-type lectin-like receptor 2 (CLEC-2). CLEC-2 is a physiological binding partner of podoplanin (PDPN) expressed on some tumor cell types and is involved in tumor cell-induced platelet aggregation and tumor metastasis. Thus, modified rhodocytin may be a possible source for anti-CLEC-2 medicine in both anti-platelet and anti-metastasis therapy...
February 28, 2018: Journal of Thrombosis and Haemostasis: JTH
Lozan Sheriff, Asma Alanazi, Lewis S C Ward, Carl Ward, Hafsa Munir, Julie Rayes, Mohammed Alassiri, Steve P Watson, Phil N Newsome, G Ed Rainger, Neena Kalia, Jon Frampton, Helen M McGettrick, Gerard B Nash
We investigated the adhesive behaviour of mesenchymal stem cells (MSC) in blood, which might influence their fate when infused as therapy. Isolated human bone marrow (BM) or umbilical cord (UC) MSC adhered efficiently from flow to the matrix proteins, collagen or fibronectin, but did not adhere to endothelial selectins. However, when suspended in blood, BMMSC no longer adhered to collagen, while UCMSC adhered along with many aggregated platelets. Neither MSC adhered to fibronectin from flowing blood, although the fibronectin surface did become coated with a platelet monolayer...
February 28, 2018: Stem Cells
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No abstract text is available yet for this article.
February 26, 2018: Development
Mariane Dos Santos, Priscila Tamar Poletti, Gaia Favero, Alessandra Stacchiotti, Francesca Bonomini, Carolina Caruccio Montanari, Silvia Regina Bona, Norma Possa Marroni, Rita Rezzani, Francisco Veríssimo Veronese
INTRODUCTION: Lupus nephritis (LN) is one of the most severe complications of systemic lupus erythematosus. As murine models of LN are valuable tools to better understand its pathophysiology and to search for new effective treatments, we investigated the effects of the bioflavonoid quercetin on pristane-induced LN mice through histomorphological analyses. METHODS: Immunofluorescence and biochemical assays were used to evaluate the expression of markers of inflammation (interleukin-6, IL-6; tumour necrosis factor-α, TNF-α), oxidative stress (catalase, CAT; superoxide dismutase 1, SOD1; thiobarbituric acid reactive substances, TBARS), apoptosis (Bax), and fibrosis (transforming growth factor-β1, TGF-β1)...
February 26, 2018: Autoimmunity
Fumitaka Mizoguchi, Kamil Slowikowski, Kevin Wei, Jennifer L Marshall, Deepak A Rao, Sook Kyung Chang, Hung N Nguyen, Erika H Noss, Jason D Turner, Brandon E Earp, Philip E Blazar, John Wright, Barry P Simmons, Laura T Donlin, George D Kalliolias, Susan M Goodman, Vivian P Bykerk, Lionel B Ivashkiv, James A Lederer, Nir Hacohen, Peter A Nigrovic, Andrew Filer, Christopher D Buckley, Soumya Raychaudhuri, Michael B Brenner
Fibroblasts regulate tissue homeostasis, coordinate inflammatory responses, and mediate tissue damage. In rheumatoid arthritis (RA), synovial fibroblasts maintain chronic inflammation which leads to joint destruction. Little is known about fibroblast heterogeneity or if aberrations in fibroblast subsets relate to pathology. Here, we show functional and transcriptional differences between fibroblast subsets from human synovial tissues using bulk transcriptomics of targeted subpopulations and single-cell transcriptomics...
February 23, 2018: Nature Communications
Yasunori Enomoto, Sayomi Matsushima, Shiori Meguro, Hideya Kawasaki, Isao Kosugi, Tomoyuki Fujisawa, Noriyuki Enomoto, Naoki Inui, Yutaro Nakamura, Takafumi Suda, Toshihide Iwashita
Pathologic differential diagnoses of pleuroparenchymal fibroelastosis (PPFE) include usual interstitial pneumonia (UIP) and pulmonary apical cap (PAC); however, there are no specific immunostaining makers to distinguish between these diseases. We performed immunohistochemistry using several pleural mesothelial cell-related markers, including cytokeratin-5/6, CAM5.2, WT-1, calretinin, desmin and podoplanin, for PPFE (n = 4), UIP (n = 10) and PAC (n = 3) lung sections. Among the examined markers, in PPFE and PAC lungs, podoplanin commonly showed positivity for spindle cells both in thickened pleura and subpleural fibroelastosis lesions; these cells were also stained with α-smooth muscle actin, a marker of myofibroblasts...
February 22, 2018: Histopathology
Akiko Kunita, Vanessa Baeriswyl, Claudia Meda, Erik Cabuy, Kimiko Takeshita, Enrico Giraudo, Andreas Wicki, Masashi Fukayama, Gerhard Christofori
Tumor invasion is a critical first step in the organismic dissemination of cancer cells and the formation of metastasis in distant organs, the most important prognostic factor and the actual cause of death in most of the cancer patients. We report here that the cell surface protein podoplanin (PDPN), a potent inducer of cancer cell invasion, is conspicuously expressed by the invasive front of squamous cell carcinomas (SCC) of the cervix in patients and in the transgenic HPV/E2 mouse model of cervical cancer...
February 16, 2018: American Journal of Pathology
Kazue Yoneda, Yasuhiro Chikaishi, Taiji Kuwata, Takashi Ohnaga, Fumihiro Tanaka
Malignant mesothelioma (MM) is a highly aggressive malignant tumor, predominantly associated with job-related exposure to asbestos. Development of effective and non-invasive modalities for diagnosis is an important issue in occupational medicine. Circulating tumor cells (CTCs), which are tumor cells that are shed from primary tumors and circulate in the peripheral blood, may be detected at an earlier stage than malignant tumors, and detection of CTCs may provide a novel insight into the diagnosis of MM. In a previous study evaluating clinical utility of CTCs, detected with a widely used system 'CellSearch', the authors indicated a significant however insufficient capability in the diagnosis of MM, suggesting need for a more sensitive system...
February 2018: Oncology Letters
Khamisah Awang Kechik, Chong Huat Siar
BACKGROUND AND AIMS: The odontogenic keratocyst (OKC) remains the most challenging jaw cyst to treat because of its locally-aggressive behaviour and high recurrence potential. Emerging evidence suggests that osteopontin, its receptors CD44v6 and integrin αv, and podoplanin, have a role in the local invasiveness of this cyst. However the spatial distribution characteristics of these pro-invasive markers in the lining epithelium of OKC, and their association with the clinicopathologic parameters of OKC are largely unexplored...
February 2018: Annals of Diagnostic Pathology
Deepa A G, Bindu Janardanan-Nair, Varun B R
Background: Podoplanin is a type I transmembrane sialomucin-like glycoprotein that is specifically expressed in lymphatic endothelial cells. Studies have shown that assessment of podoplanin expression in the epithelial cells can be used to predict the malignant transformation of potentially malignant disorders and the metastatic tendency of primary head and neck squamous cell carcinoma. The aim of our study was to compare the expression of podoplanin in oral leukoplakia, oral submucous fibrosis and oral squamous cell carcinoma with that in normal buccal mucosa by immunohistochemical methods...
December 2017: Journal of Clinical and Experimental Dentistry
Qing-Shan Wang, Rui He, Fan Yang, Li-Juan Kang, Xiao-Qing Li, Li Fu, Baocun Sun, Yu-Mei Feng
Lymphatic metastasis is the main route of breast cancer metastasis. It is known that lymphangiogenesis facilitates lymphatic metastasis through vascular endothelial growth factor-C (VEGF-C)/VEGF receptor 3 (VEGFR3) pathway-linked interactions between the tumor and its microenvironment. Here, we report a novel mechanism of lymphatic metastasis by which aggressive basal-like breast cancer (BLBC) cells form lymphatic vessel-like structures that are identified by the positive expression of lymphatic endothelial cell markers lymphatic vessel endothelial hyaluronan receptor 1 (LYVE-1), podoplanin, and VEGFR3, and termed as lymphangiogenic mimicry (LM), for the first time...
January 30, 2018: Cancer Letters
Yao-Wen Chang, Mika K Kaneko, Shinji Yamada, Yukinari Kato
The mucin-type membrane glycoprotein podoplanin (PDPN) is frequently overexpressed in numerous malignant cancers, including squamous cell carcinoma, germinal neoplasia, mesothelioma, lung cancer, oral cancer, and brain tumor. PDPN expression is strongly associated with cancer progression and poor prognosis. Furthermore, PDPN binds to C-type lectin-like receptor 2 (CLEC-2) on platelets, followed by PDPN-mediated platelet aggregation to facilitate tumor metastasis. We have previously reported a novel anti-cat PDPN (cPDPN) monoclonal antibody (mAb), PMab-52, which specifically detects cPDPN using flow cytometry analysis and successfully identifies cPDPN in feline squamous cell carcinomas...
February 2, 2018: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
Halmurat Obulkasim, Xiaolei Shi, Jun Wang, Jun Li, Bo Dai, Pengwen Wu, Shuai Wang, Xun Wang, Yitao Ding
Cancer-associated fibroblasts (CAFs) exhibit various phenotypes and serve an important role in tumor progression. However, research on podoplanin expression in CAFs is limited, and its role in the cholangiocarcinoma microenvironment remains unclear. The present study analyzed the clinical and pathological records of 42 patients diagnosed with perihilar cholangiocarcinoma (pCCA) in The Affiliated Drum Tower Hospital of Nanjing University Medical School (Nanjing, China). Immunohistochemical staining was performed to evaluate the expression of podoplanin in CAFs in order to determine its association with clinicopathological parameters and survival rate...
January 2018: Oncology Letters
Tomoto Suzuki, Yuya Takakubo, Hiroharu Oki, Xing Liu, Ryusuke Honma, Yasushi Naganuma, Stuart B Goodman, Mika K Kaneko, Yukinari Kato, Michiaki Takagi
Podoplanin (PDPN) is a transmembrane sialoglycoprotein, which is expressed in several normal tissues and malignant tumors. Although PDPN expression in rheumatoid arthritis (RA) has been reported, the role of PDPN in RA and other arthritic conditions has not been fully elucidated. In this study, we examined PDPN expression in inflammatory synovial tissues using an anti-human PDPN (hPDPN) monoclonal antibody (mAb) panel to select the most useful one for evaluation of synovitis. Synovial tissue samples were obtained from 11 RA patients and 9 osteoarthritis (OA) patients undergoing joint surgery...
January 29, 2018: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
Elzbieta Luczynska, Joanna Niemiec, Sylwia Heinze, Agnieszka Adamczyk, Aleksandra Ambicka, Paulina Marcyniuk, Wojciech Rudnicki, Jerzy W Mitus, Sonia Dyczek, Janusz Rys, Beata Sas-Korczynska
BACKGROUND/AIM: It is possible that the degree of enhancement on contrast-enhanced spectral mammography (CESM), a new diagnostic method, might provide prognostic information for breast cancer patients. Therefore, in a group of 82 breast cancer patients, we analyzed the prognostic significance of degree and pattern of enhancement on CESM as well as its relation to: (a) breast cancer immunophenotype (based on ER/PR/HER2 status) (b) podoplanin expression in cancer stroma (lymphatic vessel density plus podoplanin-positivity of cancer-associated fibroblasts), and (c) other histological parameters...
February 2018: Anticancer Research
Melanie Lohrberg, Reinhard Pabst, Jörg Wilting
BACKGROUND: The lymphatic vascular pattern in the head of mice has rarely been studied, due to problems of sectioning and immunostaining of complex bony structures. Therefore, the association of head lymphoid tissues with the lymphatics has remained unknown although the mouse is the most often used species in immunology. RESULTS: Here, we studied the association of nasal and nasolacrimal duct lymphatics with lymphoid aggregates in 14-day-old and 2-month-old mice...
January 25, 2018: BMC Immunology
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