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https://www.readbyqxmd.com/read/28537573/vascular-heterogeneity-and-specialization-in-development-and-disease
#1
REVIEW
Michael Potente, Taija Mäkinen
Blood and lymphatic vessels pervade almost all body tissues and have numerous essential roles in physiology and disease. The inner lining of these networks is formed by a single layer of endothelial cells, which is specialized according to the needs of the tissue that it supplies. Whereas the general mechanisms of blood and lymphatic vessel development are being defined with increasing molecular precision, studies of the processes of endothelial specialization remain mostly descriptive. Recent insights from genetic animal models illuminate how endothelial cells interact with each other and with their tissue environment, providing paradigms for vessel type- and organ-specific endothelial differentiation...
May 24, 2017: Nature Reviews. Molecular Cell Biology
https://www.readbyqxmd.com/read/28530642/rasa1-regulates-the-function-of-lymphatic-vessel-valves-in-mice
#2
Philip E Lapinski, Beth A Lubeck, Di Chen, Abbas Doosti, Scott D Zawieja, Michael J Davis, Philip D King
Capillary malformation-arteriovenous malformation (CM-AVM) is a blood and lymphatic vessel (LV) disorder that is caused by inherited inactivating mutations of the RASA1 gene, which encodes p120 RasGAP (RASA1), a negative regulator of the Ras small GTP-binding protein. How RASA1 mutations lead to the LV leakage defects that occur in CM-AVM is not understood. Here, we report that disruption of the Rasa1 gene in adult mice resulted in loss of LV endothelial cells (LECs) specifically from the leaflets of intraluminal valves in collecting LVs...
May 22, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28505675/-anti-lymph-angiogenic-strategies-to-improve-corneal-graft-survival
#3
Felix Bock, Claus Cursiefen
Corneal transplantation (keratoplasty) is the most frequently performed form of transplantation worldwide. A rejection reaction against the transplant is the main complication occurring after transplantation in an already vascularized, so-called "high-risk" recipient eye. Our group has shown that clinically invisible lymphatic vessels play a crucial role in the induction of a rejection reaction against the corneal graft, and that anti-(lymph)angiogenic therapies in the mouse model of keratoplasty can significantly improve transplant survival...
May 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28492519/theranostic-probes-for-targeting-tumor-microenvironment-an-overview
#4
REVIEW
Musafar Gani Sikkandhar, Anu Maashaa Nedumaran, Roopa Ravichandar, Satnam Singh, Induja Santhakumar, Zheng Cong Goh, Sachin Mishra, Govindaraju Archunan, Balázs Gulyás, Parasuraman Padmanabhan
Long gone is the time when tumors were thought to be insular masses of cells, residing independently at specific sites in an organ. Now, researchers gradually realize that tumors interact with the extracellular matrix (ECM), blood vessels, connective tissues, and immune cells in their environment, which is now known as the tumor microenvironment (TME). It has been found that the interactions between tumors and their surrounds promote tumor growth, invasion, and metastasis. The dynamics and diversity of TME cause the tumors to be heterogeneous and thus pose a challenge for cancer diagnosis, drug design, and therapy...
May 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28486498/migratory-phase-of-litomosoides-sigmodontis-filarial-infective-larvae-is-associated-with-pathology-and-transient-increase-of-s100a9-expressing-neutrophils-in-the-lung
#5
Gregory Karadjian, Frédéric Fercoq, Nicolas Pionnier, Nathaly Vallarino-Lhermitte, Emilie Lefoulon, Adélaïde Nieguitsila, Sabine Specht, Leo M Carlin, Coralie Martin
Filarial infections are tropical diseases caused by nematodes of the Onchocercidae family such as Mansonella perstans. The infective larvae (L3) are transmitted into the skin of vertebrate hosts by blood-feeding vectors. Many filarial species settle in the serous cavities including M. perstans in humans and L. sigmodontis, a well-established model of filariasis in mice. L. sigmodontis L3 migrate to the pleural cavity where they moult into L4 around day 9 and into male and female adult worms around day 30. Little is known of the early phase of the parasite life cycle, after the L3 is inoculated in the dermis by the vector and enters the afferent lymphatic vessels and before the moulting processes in the pleural cavity...
May 9, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28476614/a-strategy-for-bypassing-the-blood-brain-barrier-facial-intradermal-brain-targeted-delivery-via-the-trigeminal-nerve
#6
Xi-Chong Yu, Jing-Jing Yang, Bing-Hui Jin, He-Lin Xu, Hong-Yu Zhang, Jian Xiao, Cui-Tao Lu, Ying-Zheng Zhao, Wei Yang
Although intranasal delivery bypasses the blood-brain barrier (BBB), the anatomical location of the olfactory mucosa and respiratory airflow interference lead to less brain-targeted drug delivery. In addition to intranasal delivery, evidence indicates that facial intradermal injection might be a novel strategy for bypassing the BBB via the trigeminal nerve (TN). The hypothesis was verified by pharmacokinetic evaluation, nasal injury, lymphatic vessels inhibition and immunohistochemistry. Intradermal injection into the rat mystacial pad (i...
May 2, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28459441/mural-lymphatic-endothelial-cells-regulate-meningeal-angiogenesis-in-the-zebrafish
#7
Neil I Bower, Katarzyna Koltowska, Cathy Pichol-Thievend, Isaac Virshup, Scott Paterson, Anne K Lagendijk, Weili Wang, Benjamin W Lindsey, Stephen J Bent, Sungmin Baek, Maria Rondon-Galeano, Daniel G Hurley, Naoki Mochizuki, Cas Simons, Mathias Francois, Christine A Wells, Jan Kaslin, Benjamin M Hogan
Mural cells of the vertebrate brain maintain vascular integrity and function, play roles in stroke and are involved in maintenance of neural stem cells. However, the origins, diversity and roles of mural cells remain to be fully understood. Using transgenic zebrafish, we identified a population of isolated mural lymphatic endothelial cells surrounding meningeal blood vessels. These meningeal mural lymphatic endothelial cells (muLECs) express lymphatic endothelial cell markers and form by sprouting from blood vessels...
June 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28435226/inhibition-of-lymphangiogenesis-in-vitro-and-in-vivo-by-the-multikinase-inhibitor-nintedanib
#8
Tong Lin, Lan Gong
PURPOSE: To investigate the feasibility of nintedanib, a novel triple angiokinase inhibitor, for inhibiting lymphatic endothelial cell (LEC)-induced lymphangiogenesis in vitro and inflammatory corneal lymphangiogenesis in vivo. MATERIALS AND METHODS: Methylthiazolyldiphenyl-tetrazolium bromide (MTT) test, transwell system, and tube-formation assay were used to evaluate the effects of nintedanib on the proliferation, migration, and tube formation of LECs stimulated by vascular endothelial growth factor-C (VEGF-C), basic fibroblast growth factor (bFGF), or platelet-derived growth factor-BB (PDGF-BB)...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28424337/physical-and-chemical-gradients-in-the-tumor-microenvironment-regulate-tumor-cell-invasion-migration-and-metastasis
#9
Madeleine J Oudin, Valerie M Weaver
Cancer metastasis requires the invasion of tumor cells into the stroma and the directed migration of tumor cells through the stroma toward the vasculature and lymphatics where they can disseminate and colonize secondary organs. Physical and biochemical gradients that form within the primary tumor tissue promote tumor cell invasion and drive persistent migration toward blood vessels and the lymphatics to facilitate tumor cell dissemination. These microenvironment cues include hypoxia and pH gradients, gradients of soluble cues that induce chemotaxis, and ions that facilitate galvanotaxis, as well as modifications to the concentration, organization, and stiffness of the extracellular matrix that produce haptotactic, alignotactic, and durotactic gradients...
April 19, 2017: Cold Spring Harbor Symposia on Quantitative Biology
https://www.readbyqxmd.com/read/28410495/local-induction-of-lymphangiogenesis-with-engineered-fibrin-binding-vegf-c-promotes-wound-healing-by-increasing-immune-cell-trafficking-and-matrix-remodeling
#10
Esra Güç, Priscilla S Briquez, Didier Foretay, Manuel A Fankhauser, Jeffrey A Hubbell, Witold W Kilarski, Melody A Swartz
Lymphangiogenesis occurs in inflammation and wound healing, yet its functional roles in these processes are not fully understood. Consequently, clinically relevant strategies for therapeutic lymphangiogenesis remain underdeveloped, particularly using growth factors. To achieve controlled, local capillary lymphangiogenesis with protein engineering and determine its effects on fluid clearance, leukocyte trafficking, and wound healing, we developed a fibrin-binding variant of vascular endothelial growth factor C (FB-VEGF-C) that is slowly released upon demand from infiltrating cells...
July 2017: Biomaterials
https://www.readbyqxmd.com/read/28408396/novel-role-of-immature-myeloid-cells-in-formation-of-new-lymphatic-vessels-associated-with-inflammation-and-tumors
#11
REVIEW
Sophia Ran, Andrew Wilber
Inflammation triggers an immune cell-driven program committed to restoring homeostasis to injured tissue. Central to this process is vasculature restoration, which includes both blood and lymphatic networks. Generation of new vessels or remodeling of existing vessels are also important steps in metastasis-the major cause of death for cancer patients. Although roles of the lymphatic system in regulation of inflammation and cancer metastasis are firmly established, the mechanisms underlying the formation of new lymphatic vessels remain a subject of debate...
April 13, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28396439/structural-basis-of-tie2-activation-and-tie2-tie1-heterodimerization
#12
Veli-Matti Leppänen, Pipsa Saharinen, Kari Alitalo
The endothelial cell (EC)-specific receptor tyrosine kinases Tie1 and Tie2 are necessary for the remodeling and maturation of blood and lymphatic vessels. Angiopoietin-1 (Ang1) growth factor is a Tie2 agonist, whereas Ang2 functions as a context-dependent agonist/antagonist. The orphan receptor Tie1 modulates Tie2 activation, which is induced by association of angiopoietins with Tie2 in cis and across EC-EC junctions in trans Except for the binding of the C-terminal angiopoietin domains to the Tie2 ligand-binding domain, the mechanisms for Tie2 activation are poorly understood...
April 25, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28395729/a-novel-perivascular-cell-population-in-the-zebrafish-brain
#13
Marina Venero Galanternik, Daniel Castranova, Aniket V Gore, Nathan H Blewett, Hyun Min Jung, Amber N Stratman, Martha R Kirby, James Iben, Mayumi F Miller, Koichi Kawakami, Richard J Maraia, Brant M Weinstein
The blood-brain barrier is essential for the proper homeostasis and function of the CNS, but its mechanism of function is poorly understood. Perivascular cells surrounding brain blood vessels are thought to be important for blood-brain barrier establishment, but their roles are not well defined. Here, we describe a novel perivascular cell population closely associated with blood vessels on the zebrafish brain. Based on similarities in their morphology, location, and scavenger behavior, these cells appear to be the zebrafish equivalent of cells variably characterized as Fluorescent Granular Perithelial cells (FGPs), perivascular macrophages, or 'Mato Cells' in mammals...
April 11, 2017: ELife
https://www.readbyqxmd.com/read/28393881/tranilast-induced-stress-alleviation-in-solid-tumors-improves-the-efficacy-of-chemo-and-nanotherapeutics-in-a-size-independent-manner
#14
Panagiotis Papageorgis, Christiana Polydorou, Fotios Mpekris, Chrysovalantis Voutouri, Eliana Agathokleous, Constantina P Kapnissi-Christodoulou, Triantafyllos Stylianopoulos
Accumulation of mechanical stresses during cancer progression can induce blood and lymphatic vessel compression, creating hypo-perfusion, hypoxia and interstitial hypertension which decrease the efficacy of chemo- and nanotherapies. Stress alleviation treatment has been recently proposed to reduce mechanical stresses in order to decompress tumor vessels and improve perfusion and chemotherapy. However, it remains unclear if it improves the efficacy of nanomedicines, which present numerous advantages over traditional chemotherapeutic drugs...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28381169/the-role-of-sphingosine-1-phosphate-in-the-tumor-microenvironment-and-its-clinical-implications
#15
REVIEW
Masato Nakajima, Masayuki Nagahashi, Omar M Rashid, Kazuaki Takabe, Toshifumi Wakai
Elucidating the interaction between cancer and non-cancer cells, such as blood vessels, immune cells, and other stromal cells, in the tumor microenvironment is imperative in understanding the mechanisms underlying cancer progression and metastasis, which is expected to lead to the development of new therapeutics. Sphingosine-1-phosphate is a bioactive lipid mediator that promotes cell survival, proliferation, migration, angiogenesis/lymphangiogenesis, and immune responsiveness, which are all factors involved in cancer progression...
April 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28378806/fibroblast-growth-factor-2-drives-and-maintains-progressive-corneal-neovascularization-following-hsv-1-infection
#16
H R Gurung, M M Carr, K Bryant, A J Chucair-Elliott, D Jj Carr
Herpes simplex virus type 1 (HSV-1) infection of the cornea induces vascular endothelial growth factor A (VEGF-A)-dependent lymphangiogenesis that continues to develop well beyond the resolution of infection. Inflammatory leukocytes infiltrate the cornea and have been implicated to be essential for corneal neovascularization, an important clinically relevant manifestation of stromal keratitis. Here we report that cornea infiltrating leukocytes including neutrophils and T cells do not have a significant role in corneal neovascularization past virus clearance...
April 5, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28378237/successful-ablation-of-lymph-nodes-using-irreversible-electroporation-ire-in-a-porcine-survival-model
#17
Stefan Fritz, Christof M Sommer, Thomas Longerich, Clemens Kuhn-Neureuther, Boris Radeleff, Jens Werner, Thilo Hackert
BACKGROUND: Irreversible electroporation (IRE), a nonthermal injury ablation technique, has been shown to be effective and safe in various organs, such as in the kidney, liver, prostate, or in pancreas. In contrast to radiofrequency or microwave ablation, IRE is also effective in the neighborhood of major vessels. Many human cancers reveal lymphatic spread. The present study aimed to evaluate technical feasibility and safety of IRE in lymphatic tissue. To our knowledge, this is the first report showing successful IRE of lymph nodes in a standardized porcine survival model...
May 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28374102/predictive-significance-of-tumor-depth-and-budding-for-late-lymph-node-metastases-in-patients-with-clinical-n0-early-oral-tongue-carcinoma
#18
Yukiko Hori, Akira Kubota, Tomoyuki Yokose, Madoka Furukawa, Takeshi Matsushita, Morihito Takita, Sachiyo Mitsunaga, Nobutaka Mizoguchi, Tetsuo Nonaka, Yuko Nakayama, Nobuhiko Oridate
In clinical N0 early oral tongue carcinoma, treatment of occult lymph node metastasis is controversial. The purpose of this study was to assess the histopathological risk factors for predicting late lymph node metastasis in early oral tongue carcinoma. We retrospectively reviewed 48 patients with early oral tongue squamous cell carcinoma. Associations between the histopathological factors (depth of tumor, differentiation, blood vessel invasion, lymphatic invasion, and tumor budding) and late lymph metastasis were analyzed...
April 3, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28369440/extravillous-trophoblast-invasion-of-venous-as-well-as-lymphatic-vessels-is-altered-in-idiopathic-recurrent-spontaneous-abortions
#19
Karin Windsperger, Sabine Dekan, Sophie Pils, Carsten Golletz, Victoria Kunihs, Christian Fiala, Glen Kristiansen, Martin Knöfler, Jürgen Pollheimer
STUDY QUESTION: Do extravillous trophoblasts (EVTs) invade non-arterial decidual vessels in healthy and pathological pregnancies? SUMMARY ANSWER: Our results reveal that trophoblast invasion of venous and lymphatic vessels is a frequent event during the first trimester of pregnancy and is compromised in  recurrent spontaneous abortion (RSA). In addition, the present data suggest that EVTs populate regional lymph nodes during pregnancy. WHAT IS ALREADY KNOWN: Human trophoblasts remodel and invade decidual spiral arteries...
June 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28333941/phenotypically-heterogeneous-podoplanin-expressing-cell-populations-are-associated-with-the-lymphatic-vessel-growth-and-fibrogenic-responses-in-the-acutely-and-chronically-infarcted-myocardium
#20
Maria Cimini, Antonio Cannatá, Gianandrea Pasquinelli, Marcello Rota, Polina Goichberg
Cardiac lymphatic vasculature undergoes substantial expansion in response to myocardial infarction (MI). However, there is limited information on the cellular mechanisms mediating post-MI lymphangiogenesis and accompanying fibrosis in the infarcted adult heart. Using a mouse model of permanent coronary artery ligation, we examined spatiotemporal changes in the expression of lymphendothelial and mesenchymal markers in the acutely and chronically infarcted myocardium. We found that at the time of wound granulation, a three-fold increase in the frequency of podoplanin-labeled cells occurred in the infarcted hearts compared to non-operated and sham-operated counterparts...
2017: PloS One
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