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Neha S Agnihotri, Madhusudan Astekar
Oral squamous cell carcinoma is the most common malignant tumor of the head and neck regions and accounts for more than 90% of cancers in the oral cavity. The angiogenesis, lymphangiogenesis and epithelial mesenchymal transition are known to be pivotal for tumor progression and metastasis. In the last decade, much data has been generated concerning the molecular mechanisms of angiogenesis, lymphangiogenesis and its significance in pathological conditions. The main angiogenic and lymphangiogenic factors have been identified as vascular endothelial growth factor A (VEGF-A), vascular endothelial growth factor receptor 2 (VEGFR-2), forkhead box (FOX) C2 while vascular endothelial growth factor C/D (VEGF-C/D), vascular endothelial growth factor receptor 3 (VEGFR-3), Prospero homeobox 1 (PROX1), LYVE-1, podoplanin, Tie/Angioprotein (Ang) 2 and EphrinB2 respectively...
May 2018: Journal of Experimental Therapeutics & Oncology
Betti Schaefer, Maria Bartosova, Stephan Macher-Goeppinger, Peter Sallay, Peter Vörös, Bruno Ranchin, Karel Vondrak, Gema Ariceta, Ariane Zaloszyc, Aysun K Bayazit, Uwe Querfeld, Rimante Cerkauskiene, Sara Testa, Christina Taylan, Johan VandeWalle, YokChin Yap, Rafael T Krmar, Rainer Büscher, Anne K Mühlig, Dorota Drozdz, Salim Caliskan, Felix Lasitschka, Sahar Fathallah-Shaykh, Enrico Verrina, Günter Klaus, Klaus Arbeiter, Raj Bhayadia, Anette Melk, Philipp Romero, Bradley A Warady, Franz Schaefer, Akos Ujszaszi, Claus Peter Schmitt
The effect of peritoneal dialysates with low-glucose degradation products on peritoneal membrane morphology is largely unknown, with functional relevancy predominantly derived from experimental studies. To investigate this, we performed automated quantitative histomorphometry and molecular analyses on 256 standardized peritoneal and 172 omental specimens from 56 children with normal renal function, 90 children with end-stage kidney disease at time of catheter insertion, and 82 children undergoing peritoneal dialysis using dialysates with low-glucose degradation products...
May 15, 2018: Kidney International
Amanda McCabe, Julianne N P Smith, Angelica Costello, Jackson Maloney, Divya Katikaneni, Katherine C MacNamara
Severe aplastic anemia results from profound hematopoietic stem cell loss. T cells and interferon gamma have long been associated with severe aplastic anemia, yet the underlying mechanisms driving hematopoietic stem cell loss remain unknown. Using a mouse model of severe aplastic anemia, we demonstrate that interferon gamma-dependent hematopoietic stem cell loss required macrophages. Interferon gamma was necessary for bone marrow macrophage persistence, despite loss of other myeloid cells and hematopoietic stem cells...
May 17, 2018: Haematologica
Christina Mitteldorf, Mar Llamas-Velasco, Hans-Joachim Schulze, Kai-Martin Thoms, Thomas Mentzel, Michael Tronnier, Heinz Kutzner
BACKGROUND: We investigated two cases of deceptively bland cutaneous angiosarcoma, which showed a uniform clinical presentation with a rapidly growing tumor on the nose. It remains unclear whether this was a primary cutaneous manifestation or a metastasis. Both tumors initially presented a high histologic overlap with a benign vascular tumor. The diagnosis was primarily based on the rapidly progressing clinical course and on the results of the staging procedures. METHODS: Immunohistochemical stains were performed for cytokeratin (AE1/AE3 and MNF116), CD31, ERG, CD34(HPCA1/my10), D2-40/podoplanin, LYVE-1, Ki67, PHH3, αSMA(1A4), MYC, FOS-B, CAMTA-1, TFE-3, WT1, nestin, VEGFR-2(KDR), VEGFR-3(FLT4), HHV8...
May 15, 2018: Journal of Cutaneous Pathology
Akihiro Miyazaki, Hiromi Nakai, Tomoko Sonoda, Yoshihiko Hirohashi, Mika K Kaneko, Yukinari Kato, Yoshihiko Sawa, Hiroyoshi Hiratsuka
Purpose: We report that the reactivity of a novel monoclonal antibody LpMab-23 for human cancer-type podoplanin (PDPN) is a predictor for a poor prognosis of tongue cancer. Patients and Methods: The association between LpMab-23-recognizing cancer-type PDPN expression and clinical/pathological features were analyzed on 60 patients with stage I and II tongue cancer treated with transoral resection of the primary tumor. Results: In the mode of invasion, the LpMab-23-dull/negative cases were significantly larger in cases with low-grade malignancies and without late cervical lymph node metastasis, than in cases with high-grade malignancies and the metastasis...
April 20, 2018: Oncotarget
A Trost, C Runge, D Bruckner, A Kaser-Eichberger, B Bogner, C Strohmaier, H A Reitsamer, F Schroedl
Tissues of the central nervous system (CNS), including the optic nerve (ON), are considered a-lymphatic. However, lymphatic structures have been described in the dura mater of human ON sheaths. Since it is known that lymphatic markers are also expressed by single non-lymphatic cells, these results need confirmation according to the consensus statement for the use of lymphatic markers in ophthalmologic research. The aim of this study was to screen for the presence of lymphatic structures in the adult human ON using a combination of four lymphatic markers...
May 7, 2018: Experimental Eye Research
Han Jo Kim, Moo-Jun Baek, Dong Hyun Kang, Sang-Cheol Lee, Sang Byung Bae, Kyu Taek Lee, Namsu Lee, Hyungjoo Kim, Dongjun Jeong, Tae Sung Ahn, Moon Soo Lee, Dae Sik Hong, Jong-Ho Won
PURPOSE: Animal models show a strong relationship between lymphangiogenesis and lymph node metastasis. However, the clinical significance of lymphangiogenesis in patients with colorectal cancer (CRC) remains uncertain. This study aimed to evaluate the association between c-Met and lymphangiogenic factors and to elucidate the prognostic significance of c-Met in patients with CRC. METHODS: A total of 379 tissue samples were obtained from surgically resected specimens from patients with CRC at Soonchunhyang University Cheonan Hospital between January 2002 and December 2010...
April 2018: Annals of Coloproctology
Yao-Yin Li, Chuan-Xiang Zhou, Yan Gao
Podoplanin is upregulated in the invasive front of oral squamous cell carcinoma (OSCC). Carcinoma-associated fibroblasts (CAFs) may mediate podoplanin expression. However, the role of podoplanin in OSCC cell and fibroblast interaction remains elusive. In the present study, we found that positive podoplanin expression in OSCC cells correlated with smooth muscle actin (α-SMA) expression in CAFs. Using CAFs and normal mucosal fibroblasts (NFs), we established indirect and direct co-culture systems mimicking the structure of OSCC...
April 29, 2018: Experimental Cell Research
Suguru Maruyama, Shinji Furuya, Kensuke Shiraishi, Hiroki Shimizu, Hidenori Akaike, Naohiro Hosomura, Yoshihiko Kawaguchi, Hidetake Amemiya, Hiromichi Kawaida, Makoto Sudo, Shingo Inoue, Hiroshi Kono, Daisuke Ichikawa
BACKGROUND/AIM: Several recent studies have suggested that podoplanin (PDPN) expression correlates with malignant potential in various types of cancers. We investigated the expression pattern of PDPN and its clinical significance in gastric cancer. MATERIALS AND METHODS: We assessed the immunohistochemical expression of PDPN in 91 gastric cancer tissues of patients who underwent curative surgery and evaluated the relationship between the expression levels and clinicopathological factors...
May 2018: Anticancer Research
Pegah Mir Seyed Nazari, Julia Riedl, Ingrid Pabinger, Cihan Ay
Venous thromboembolism (VTE) is a frequent and life-threatening complication in patients with cancer. The underlying mechanisms of cancer-associated VTE are still not completely understood. However, emerging studies indicate that the mechanisms differ across tumor types. A recent study revealed that in patients with brain tumors, podoplanin overexpression is strongly correlated with intratumoral thrombotic vessels, hypercoagulability and increased VTE risk. In vitro experiments demonstrated that platelet aggregation induced by human glioblastoma cells was highly podoplanin-dependent...
April 2018: Thrombosis Research
Kazuki Sato, Shin-Ichiro Honda, Akira Shibuya, Kazuko Shibuya
Germinal centers (GCs) in secondary lymphoid organs generate large numbers of apoptotic B cells that must be eliminated by phagocytes to prevent the development of autoimmune diseases. Although tingible body macrophages engulf apoptotic GC B cells, whether stromal cells are also involved in this process is unclear. In this study, we identified marginal reticular cells (MRCs) as novel nonprofessional phagocytes for the clearance of apoptotic GC B cells in the spleen. We used CD19eGFP (CD19cre Z/EG) mice, which express enhanced GFP (eGFP) under the control of CD19cre expression, to track B cells in the GCs after immunization with NP-chicken γ globulin plus aluminum salt...
April 23, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
E Weber, F Sozio, A Borghini, P Sestini, E Renzoni
Our understanding of lymphatic vessels has been advanced by the recent identification of relatively specific lymphatic endothelium markers, including Prox-1, VEGFR3, podoplanin and LYVE-1. The use of lymphatic markers has led to the observation that, contrary to previous assumptions, human lymphatic vessels extend deep inside the pulmonary lobule, either in association with bronchioles, intralobular arterioles or small pulmonary veins. Pulmonary lymphatic vessels may thus be classified into pleural, interlobular (in interlobular septa) and intralobular...
April 18, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
L Manta, M C Rusu, F Pop
Telocytes (TCs) are stromal cells with telopodes, which represent long, thin, moniliform cell processes; however, this morphological feature alone is insufficient to define a cell type. Specific markers of lymphatic endothelial cells (LECs), such as Prox-1, podoplanin (D2-40) or LYVE-1, are not usually tested in TCs. We thus aimed at performing a study in light microscopy to evaluate whether or not LECs could be mistaken for TCs. Therefore we used CD34, α-smooth muscle actin and D2-40 for an immunohistochemical study on archived paraffin-embedded samples of uterine leiomyoma...
April 17, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
Pegah Nazari Mir Seyed, Julia Riedl, Matthias Preusser, Florian Posch, Johannes Thaler, Christine Marosi, Peter Birner, Gerda Ricken, Johannes A Hainfellner, Ingrid Pabinger, Cihan Ay
BACKGROUND: Venous thromboembolism (VTE) is a frequent complication in primary brain tumor patients. Independent studies revealed that podoplanin expression in brain tumors is associated with increased VTE risk, while the isocitrate dehydrogenase 1 (IDH1) mutation is associated with very low VTE risk. OBJECTIVES: To investigate the interrelation between intratumoral podoplanin expression and IDH1 mutation, and their mutual impact on VTE development. PATIENTS/METHODS: In a prospective cohort study, intratumoral IDH1 R132H mutation and podoplanin were determined in brain tumor specimens (mainly glioma) by immunohistochemistry...
April 19, 2018: Journal of Thrombosis and Haemostasis: JTH
Akihiro Ito, Mitsuhiko Ohta, Yukinari Kato, Shunko Inada, Toshio Kato, Susumu Nakata, Yasushi Yatabe, Mitsuo Goto, Norio Kaneda, Kenichi Kurita, Hayao Nakanishi, Kenji Yoshida
Podoplanin is distinctively overexpressed in oral squamous cell carcinoma than oral benign neoplasms and plays a crucial role in the pathogenesis and metastasis of oral squamous cell carcinoma but its diagnostic application is quite limited. Here, we report a new near-infrared fluorescence imaging method using an indocyanine green (ICG)-labeled anti-podoplanin antibody and a desktop/a handheld ICG detection device for the visualization of oral squamous cell carcinoma-xenografted tumors in nude mice. Both near-infrared imaging methods using a desktop (in vivo imaging system: IVIS) and a handheld device (photodynamic eye: PDE) successfully detected oral squamous cell carcinoma tumors in nude mice in a podoplanin expression-dependent manner with comparable sensitivity...
January 1, 2018: Technology in Cancer Research & Treatment
Noala Vicensoto Moreira Milhan, Letícia Cavassini Torquato, Victor Costa, Andrea Carvalho De Marco, Yasmin Rodarte Carvalho, Ana Lia Anbinde
Intravascular papillary endothelial hyperplasia (IPEH) is an unusual benign, non-neoplastic vascular lesion that usually occurs in skin, but is uncommon in the oral cavity. Herein, we review the pertinent literature of oraiiPEH and report a new mixed form. A 61-year- old man presented with an ulcerated nodule in the lingual portion of the gingiva related to the left mandibular canine. An excisional biopsy was performed presuming the clinical diagnosis of pyogenic granuloma. Histopathological analysis showed areas of granulation tissue consistent with pyogenic  granuloma...
February 15, 2018: Dermatology Online Journal
Tomohiro Takenawa, Takenori Kanai, Tetsuya Kitamura, Yoshitaka Yoshimura, Yoshihiko Sawa, Junichiro Iida
This study investigates the significance of the expression and dynamics of podoplanin in mechanostress and mineralization in cultured murine osteoblasts. Podoplanin increased in osteoblasts subjected to straining in non-mineralization medium, suggesting that the mechanostress alone is a podoplanin induction factor. In osteoblasts subjected to vertical elongation straining in the mineralization medium, the mRNA amounts of podoplanin, osteopontin, and osteocalcin were significantly larger than those in cells not subjected to straining, suggesting that mechanostress is the cause of a synergistic effect in the expression of these proteins...
February 27, 2018: Acta Histochemica et Cytochemica
Rie Nishishita, Satoko Morohashi, Hiroko Seino, Yunyan Wu, Tadashi Yoshizawa, Toshihiro Haga, Kensuke Saito, Kenichi Hakamada, Shinsaku Fukuda, Hiroshi Kijima
Colorectal cancer is one of the most common causes of mortality from cancer worldwide. Previous studies have demonstrated that cancer-associated fibroblasts (CAFs) promote neoangiogenesis and tumor growth for various tumors. The present study analyzed CAF markers, including α-smooth muscle actin (α-SMA), collagen I, platelet-derived growth factor receptor-β (PDGFR-β), and D2-40 (antibody recognizing podoplanin), and vessel markers, including cluster of differentiation (CD)31 and CD34, for 121 advanced colorectal cancer cases using a digital image analyzing technique...
May 2018: Oncology Letters
Shinji Yamada, Mika K Kaneko, Shunsuke Itai, Yao-Wen Chang, Takuro Nakamura, Miyuki Yanaka, Satoshi Ogasawara, Takeshi Murata, Hiroaki Uchida, Hideaki Tahara, Hiroyuki Harada, Yukinari Kato
Podoplanin (PDPN), a type I transmembrane sialoglycoprotein, is expressed on normal renal podocytes, pulmonary type I alveolar cells, and lymphatic endothelial cells. Increased expression of PDPN in cancers is associated with poor prognosis and hematogenous metastasis through interactions with C-type lectin-like receptor 2 (CLEC-2) on platelets. We previously reported a novel PMab-48 antibody, which is an anti-dog PDPN (dPDPN) monoclonal antibody (mAb) recognizing PDPN expressed in lymphatic endothelial cells...
April 2, 2018: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
Yong Woo Ji, Jae Lim Lee, Hyun Goo Kang, Nayeong Gu, Haewon Byun, Areum Yeo, Hyemi Noh, Soyoung Kim, Eun Young Choi, Jong Suk Song, Hyung Keun Lee
PURPOSE: While the normal cornea has limited innervation by the lymphatic system, chronic immune-inflammatory disorders such as dry eye (DE) can induce lymphangiogenesis in the ocular surface. Using a conditional knock-down murine model, Lyve-1Cre ;VEGFR2flox mice, this study investigated the role of lymphangiogenesis in the pathophysiology of DE. METHODS: DE was induced in both wild type (WT) B6 and Lyve-1Cre ;VEGFR2flox mice. Tissue immunostaining and volumetric gross measurements were used to assess changes in the ocular surface, skin, and lymph nodes (LNs)...
March 27, 2018: Ocular Surface
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