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https://www.readbyqxmd.com/read/29334573/-a-fresh-cadaver-study-on-indocyanine-green-fluorescence-lymphography-a-new-whole-body-imaging-technique-for-investigating-the-superficial-lymphatics
#1
Akira Shinaoka, Seijiro Koshimune, Kiyoshi Yamada, Kanae Kumagishi, Hiroo Suami, Yoshihiro Kimata, Aiji Ohtsuka
BACKGROUND: Identification of the lymphatic system in cadavers is painstaking because lymphatic vessels have very thin walls and are transparent. Selection of appropriate contrast agents is a key factor for successfully visualizing the lymphatics. In this study, we introduce a new imaging technique of lymphatic mapping in whole body of fresh cadavers. METHODS: Ten fresh human cadavers were used for this study. We injected 0.1 mL of indocyanine green fluorescence (ICG) solution subcutaneously at multiple spots along the watershed lines between lymphatic territories and hand and foot regions...
January 10, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29323343/targeting-lymphatic-function-as-a-novel-therapeutic-intervention-for-rheumatoid-arthritis
#2
REVIEW
Echoe M Bouta, Richard D Bell, Homaira Rahimi, Lianping Xing, Ronald W Wood, Clifton O Bingham, Christopher T Ritchlin, Edward M Schwarz
Although clinical outcomes for patients with rheumatoid arthritis (RA) have greatly improved with the use of biologic and conventional DMARDs, approximately 40% of patients do not achieve primary clinical outcomes in randomized trials, and only a small proportion achieve lasting remission. Over the past decade, studies in murine models point to the critical role of the lymphatic system in the pathogenesis and therapy of inflammatory-erosive arthritis, presumably by the removal of catabolic factors, cytokines and inflammatory cells from the inflamed synovium...
January 11, 2018: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/29318557/ear-sponge-assay-a-method-to-investigate-angiogenesis-and-lymphangiogenesis-in-mice
#3
Maureen Van de Velde, Melissa García-Caballero, Tania Durré, Frédéric Kridelka, Agnès Noël
Angiogenesis and lymphangiogenesis have become important research areas in the biomedical field. The outgrowth of new blood (angiogenesis) and lymphatic (lymphangiogenesis) vessels from preexisting ones is involved in many pathologies including cancer. In-depth investigations of molecular determinants such as proteases in these complex processes require reliable in vivo models. Here we present the ear sponge assay as an easy, rapid, quantitative and reproducible model of angiogenesis and lymphangiogenesis. In this system, a gelatin sponge soaked with tumor cells, cell-conditioned medium, or a compound to be tested is implanted, for 2-4 weeks, between the two mouse ear skin layers...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29318367/-vascular-anomalies-part%C3%A2-ii-vascular-malformations
#4
S Mylonas, S Brunkwall, J Brunkwall
Vascular malformations are congenital vascular anomalies with normal endothelial turnover, which can affect the whole vessel tree (arterial, capillary or lymphatic) both as isolated defects or as part of a syndrome. Developmental errors during embryogenesis, such as abnormal signaling processes that control the apoptosis, maturation and growth of vascular cells, lead to the persistence of vascular plexus cells with some degree of differentiation. Vascular malformations are usually present at birth, although symptoms or complications may be manifested later...
January 9, 2018: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
https://www.readbyqxmd.com/read/29310798/mechanotransduction-in-blood-and-lymphatic-vascular-development-and-disease
#5
Sofia Urner, Molly Kelly-Goss, Shayn M Peirce, Eckhard Lammert
The blood and lymphatic vasculatures are hierarchical networks of vessels, which constantly transport fluids and, therefore, are exposed to a variety of mechanical forces. Considering the role of mechanotransduction is key for fully understanding how these vascular systems develop, function, and how vascular pathologies evolve. During embryonic development, for example, initiation of blood flow is essential for early vascular remodeling, and increased interstitial fluid pressure as well as initiation of lymph flow is needed for proper development and maturation of the lymphatic vasculature...
2018: Advances in Pharmacology
https://www.readbyqxmd.com/read/29306049/evaluation-of-lymphedema-in-upper-extremities-by-mr-lymphangiography-comparison-with-lymphoscintigraphy
#6
Jae Seok Bae, Roh-Eul Yoo, Seung Hong Choi, Seong Oh Park, Hak Chang, Minseok Suh, Gi Jeong Cheon
PURPOSE: To validate usefulness of magnetic resonance (MR) lymphangiography for evaluation of peripheral lymphedema in upper extremities by comparison with lymphoscintigraphy. MATERIALS AND METHODS: This prospective study had institutional review board approval and written informed consent was obtained from all patients. Initially, protocol of MR lymphangiography for upper extremity was established in seven healthy volunteers with 3.0T fat-saturated three-dimensional gradient-echo MR after gadobutrol injection...
January 3, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29301108/mesenchymal-stromal-cells-inhibit-inflammatory-lymphangiogenesis-in-the-cornea-by-suppressing-macrophage-in-a-tsg-6-dependent-manner
#7
Hyun Beom Song, Se Yeon Park, Jung Hwa Ko, Jong Woo Park, Chang Ho Yoon, Dong Hyun Kim, Jeong Hun Kim, Mee Kum Kim, Ryang Hwa Lee, Darwin J Prockop, Joo Youn Oh
The cornea is a transparent tissue devoid of blood and lymphatic vessels. However, various inflammatory conditions can cause hemangiogenesis and lymphangiogenesis in the cornea, compromising transparency and visual acuity. Mesenchymal stem/stromal cells (MSCs) have therapeutic potentials in a variety of diseases because of anti-inflammatory properties. Herein, we investigated the effects of MSCs on corneal angiogenesis using a model of suture-induced inflammatory corneal neovascularization. Data demonstrated that an intravenous administration of MSCs suppressed corneal inflammation and neovascularization, inhibiting both hemangiogenesis and lymphangiogenesis...
January 3, 2018: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/29300337/emerging-roles-for-vegf-d-in-human-disease
#8
REVIEW
Steven A Stacker, Marc G Achen
Blood vessels and lymphatic vessels are located in many tissues and organs throughout the body, and play important roles in a wide variety of prevalent diseases in humans. Vascular endothelial growth factor-D (VEGF-D) is a secreted protein that can promote the remodeling of blood vessels and lymphatics in development and disease. Recent fundamental and translational studies have provided insight into the molecular mechanisms by which VEGF-D exerts its effects in human disease. Hence this protein is now of interest as a therapeutic and/or diagnostic target, or as a potential therapeutic agent, in a diversity of indications in cardiovascular medicine, cancer and the devastating pulmonary condition lymphangioleiomyomatosis...
January 4, 2018: Biomolecules
https://www.readbyqxmd.com/read/29285934/synthetic-polymeric-mixed-micelles-target-to-lymph-node-triggering-enhanced-cellular-and-humoral-immune-responses
#9
Chenxi Li, Xiaoxu Zhang, Qing Chen, Jiulong Zhang, Wenpan Li, Haiyang Hu, Xiuli Zhao, Mingxi Qiao, Dawei Chen
It has been widely accepted that lymph nodes (LNs) are critical targets of cancer vaccines since antigen presentation and initiation of T cell-mediated immune responses occur primarily at these locations. In this study, amphiphilic diblock copolymer PEOz-PLA combined with carboxylterminalted-Pluronic F127 were used to construct mixed micelles (carboxylated-NPs) for co-delivery of antigen OVA and Toll-like receptor-7 agonist CL264 (carboxylated-NPs/OVA/CL264) to the LN resident DCs. The results showed that the small, sub-60nm size of the self-assembled mixed micelles enables them to rapidly penetrate into lymphatic vessels and reach DLNs after subcutaneous injection...
December 29, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29284928/molecular-pathogenesis-and-diagnostic-imaging-of-metastatic-jaw-tumors
#10
REVIEW
Kenniyan Kumar Srichinthu, Arjun Parameshwar Raveendran, Periyasamy Tamilthangam, Joseph Joe, Charanya Duraisamy, Thukanayakanpalayam Ragunathan Yoithapprabhunath, Chitturi Ravi Teja
Metastasis is the spread of malignant cells from a primary tumor to distant sites through lymphatics or blood vessels. Malignant lesions metastasizing to the oral and perioral region are a rarity indeed. Malignant lesions could metastasize to both soft tissue of oral cavity and the hard tissues of the jaws and recent meta-analysis showed that metastasis is more common in the jaws than oral soft tissues because of rich vascular supply. The incidence is very low when compared to the incidence of primary oral cancers; nevertheless, one has to include in the diagnostic workup, metastatic malignant lesions, when an irregular ill-defined radiolucency or radiodensity with ragged edges in noted...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29282520/tgf%C3%AE-counteracts-lyve-1-mediated-induction-of-lymphangiogenesis-by-small-hyaluronan-oligosaccharides
#11
Jochen Bauer, Melanie Rothley, Anja Schmaus, Luca Quagliata, Markus Ehret, Moritz Biskup, Véronique Orian-Rousseau, David G Jackson, Ronald J Pettis, Alfred Harvey, Stefan Bräse, Wilko Thiele, Jonathan P Sleeman
During tissue injury, inflammation, and tumor growth, enhanced production and degradation of the extracellular matrix glycosaminoglycan hyaluronan (HA) can lead to the accumulation of small HA (sHA) oligosaccharides. We have previously reported that accumulation of sHA in colorectal tumors correlates with lymphatic invasion and lymph node metastasis, and therefore, investigated here are the effects of sHA on the lymphatic endothelium. Using cultured primary lymphatic endothelial cells (LECs) and ex vivo and in vivo lymphangiogenesis assays, we found that in contrast to high-molecular-weight HA (HMW-HA), sHA of 4-25 disaccharides in length can promote the proliferation of LECs and lymphangiogenesis in a manner that is dependent on their size and concentration...
December 27, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/29277762/highly-activated-pd-1-pd-l1-pathway-in-gastric-cancer-with-pd-l1-expression
#12
Hiroaki Saito, Yusuke Kono, Yuki Murakami, Yuji Shishido, Hirohiko Kuroda, Tomoyuki Matsunaga, Yoji Fukumoto, Tomohiro Osaki, Keigo Ashida, Yoshiyuki Fujiwara
BACKGROUND: A recent study demonstrated that immune-checkpoint molecules are associated with tumoral immune evasion. MATERIALS AND METHODS: Programmed cell death protein 1 (PD-1) expression on CD4+ and CD8+ T-cells obtained from gastric cancer tissue was evaluated by multicolor flow cytometry. Immunohistochemical staining was also performed to evaluate programmed cell death ligand-1 (PD-L1) expression on gastric cancer cells. RESULTS: There were statistically significant correlations between PD-L1 expression and age, histology, tumor size, depth of invasion, lymph node metastasis, lymphatic vessel invasion, venous invasion, and disease stage...
January 2018: Anticancer Research
https://www.readbyqxmd.com/read/29275545/application-of-optical-coherence-tomography-for-in-vivo-monitoring-of-the-meningeal-lymphatic-vessels-during-opening-of-blood-brain-barrier-mechanisms-of-brain-clearing
#13
Oxana Semyachkina-Glushkovskaya, Arkady Abdurashitov, Alexander Dubrovsky, Denis Bragin, Olga Bragina, Nataliya Shushunova, Galina Maslyakova, Nikita Navolokin, Alla Bucharskaya, Valery Tuchin, Juergen Kurths, Alexander Shirokov
The meningeal lymphatic vessels were discovered 2 years ago as the drainage system involved in the mechanisms underlying the clearance of waste products from the brain. The blood-brain barrier (BBB) is a gatekeeper that strongly controls the movement of different molecules from the blood into the brain. We know the scenarios during the opening of the BBB, but there is extremely limited information on how the brain clears the substances that cross the BBB. Here, using the model of sound-induced opening of the BBB, we clearly show how the brain clears dextran after it crosses the BBB via the meningeal lymphatic vessels...
December 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29275449/lymphatic-vessel-involvement-is-predictive-for-lymph-node-metastasis-and-an-important-prognostic-factor-in-endometrial-cancer
#14
Akihiko Wakayama, Wataru Kudaka, Hirofumi Matsumoto, Hajime Aoyama, Takuma Ooyama, Yusuke Taira, Yoshihisa Arakaki, Yuko Shimoji, Tadaharu Nakasone, Kumiko Nishihira, Itomi Kaneshima, Tomoko Tamaki, Naoki Yoshimi, Yoichi Aoki
BACKGROUND: Lymphovascular space involvement is reported to be an important risk factor in endometrial cancer. This study was conducted to evaluate the separate prognostic effects of lymphatic invasion and venous invasion on the outcomes of patients with endometrial cancer. METHODS: From 2006 to 2013, 189 histologically confirmed endometrial cancer patients were examined. To study the venous invasion (v) of the endometrial cancer, Victoria blue-H&E staining-which positively stains the elastic fibers of vessels-was performed...
December 23, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29245295/lymphangiomatosis-involving-the-pulmonary-and-extrapulmonary-lymph-nodes-and-surrounding-soft-tissue-a-rare-case-report
#15
Xuhua Fang, Ziling Huang, Yu Zeng, Xuyou Zhu, Siqi Wang, Xiaoting Yu, Xian Li, Chunyan Wu, Xianghua Yi
BACKGROUND: Diffuse pulmonary lymphangiomatosis (DPL) mainly affects the lung and pleura. There are very few pathological reports of lung damage accompanied by diffuse involvement of the extrapulmonary lymph nodes and surrounding soft tissue. The clinicopathological significance of coexistence of pulmonary and extrapulmonary lesions is unknown. METHODS: Here, we report a 16-year-old male patient. The pathological specimens of the supraclavicular lymph node and soft tissue together with the lung biopsy were analyzed by pathological observation and immunohistochemical staining...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29243194/kallistatin-inhibits-lymphangiogenesis-and-lymphatic-metastasis-of-gastric-cancer-by-downregulating-vegf-c-expression-and-secretion
#16
Caiqi Ma, Chuanghua Luo, Haofan Yin, Yang Zhang, Wenjun Xiong, Ting Zhang, Tianxiao Gao, Xi Wang, Di Che, Zhenzhen Fang, Lei Li, Jinye Xie, Mao Huang, Liuqing Zhu, Ping Jiang, Weiwei Qi, Ti Zhou, Zhonghan Yang, Wei Wang, Jianxing Ma, Guoquan Gao, Xia Yang
BACKGROUND: Tumor-induced lymphangiogenesis and lymphatic metastasis are predominant during the metastasis of many types of cancers. However, the endogenous inhibitors that counterbalance the lymphangiogenesis and lymphatic metastasis of tumors have not been well evaluated. Kallistatin has been recognized as an endogenous angiogenesis inhibitor. METHODS AND RESULTS: Our recent study showed for the first time that the lymphatic vessel density (LVD) was reduced in lung and stomach sections from kallistatin-overexpressing transgenic mice...
December 14, 2017: Gastric Cancer
https://www.readbyqxmd.com/read/29242747/usefulness-of-preoperative-echography-for-detection-of-lymphatic-vessels-for-lymphaticovenous-anastomosis
#17
Hisako Hara, Makoto Mihara
Case 1: A 63-year-old woman with secondary lower limb lymphedema. As it was difficult to detect the lymphatic vessels in the right thigh in indocyanine green lymphography because of thick fat, we tried echography and observed circular structures beneath the superficial fascia. Intraoperatively, we found a dilated lymphatic vessel just as observed on echography. Case 2: A 45-year-old woman with primary lower limb lymphedema. As she was allergic to iodinated contrast medium, we could not use indocyanine green lymphography preoperatively...
2017: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29242199/organ-specific-lymphatic-vasculature-from-development-to-pathophysiology
#18
REVIEW
Tatiana V Petrova, Gou Young Koh
Recent discoveries of novel functions and diverse origins of lymphatic vessels have drastically changed our view of lymphatic vasculature. Traditionally regarded as passive conduits for fluid and immune cells, lymphatic vessels now emerge as active, tissue-specific players in major physiological and pathophysiological processes. Lymphatic vessels show remarkable plasticity and heterogeneity, reflecting their functional specialization to control the tissue microenvironment. Moreover, alternative developmental origins of lymphatic endothelial cells in some organs may contribute to the diversity of their functions in adult tissues...
December 14, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29240008/genome-wide-discovery-of-a-novel-gene-expression-signature-for-the-identification-of-lymph-node-metastasis-in-esophageal-squamous-cell-carcinoma
#19
Fuminori Sonohara, Feng Gao, Naoki Iwata, Mitsuro Kanda, Masahiko Koike, Naoki Takahashi, Yasuhide Yamada, Yasuhiro Kodera, Xin Wang, Ajay Goel
OBJECTIVE: This study aimed to develop a gene-expression signature for identification of lymph node (LN) metastasis in esophageal squamous cell carcinoma (ESCC) patients. SUMMARY OF BACKGROUND DATA: LN metastasis is recognized as the most important independent risk factor for therapeutic decision-making of ESCC patients. METHODS: A bioinformatic approach was used to analyze RNA sequencing profiles of ESCC patients, and to develop a gene-expression signature for identifying LN metastasis...
December 12, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/29237738/ascending-vasa-recta-are-angiopoietin-tie2-dependent-lymphatic-like-vessels
#20
Yael Kenig-Kozlovsky, Rizaldy P Scott, Tuncer Onay, Isabel Anna Carota, Benjamin R Thomson, Hyea Jin Gil, Veronica Ramirez, Shinji Yamaguchi, Christine E Tanna, Stefan Heinen, Christine Wu, Radu V Stan, Janet D Klein, Jeff M Sands, Guillermo Oliver, Susan E Quaggin
Urinary concentrating ability is central to mammalian water balance and depends on a medullary osmotic gradient generated by a countercurrent multiplication mechanism. Medullary hyperosmolarity is protected from washout by countercurrent exchange and efficient removal of interstitial fluid resorbed from the loop of Henle and collecting ducts. In most tissues, lymphatic vessels drain excess interstitial fluid back to the venous circulation. However, the renal medulla is devoid of classic lymphatics. Studies have suggested that the fenestrated ascending vasa recta (AVRs) drain the interstitial fluid in this location, but this function has not been conclusively shown...
December 13, 2017: Journal of the American Society of Nephrology: JASN
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