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https://www.readbyqxmd.com/read/28920924/impaired-angiopoietin-tie2-signaling-compromises-schlemm-s-canal-integrity-and-induces-glaucoma
#1
Jaeryung Kim, Dae-Young Park, Hosung Bae, Do Young Park, Dongkyu Kim, Choong-Kun Lee, Sukhyun Song, Tae-Young Chung, Dong Hui Lim, Yoshiaki Kubota, Young-Kwon Hong, Yulong He, Hellmut G Augustin, Guillermo Oliver, Gou Young Koh
Primary open-angle glaucoma (POAG) is often caused by elevated intraocular pressure (IOP), which arises due to increased resistance to aqueous humor outflow (AHO). Aqueous humor flows through Schlemm's canal (SC), a lymphatic-like vessel encircling the cornea, and via intercellular spaces of ciliary muscle cells. However, the mechanisms underlying increased AHO resistance are poorly understood. Here, we demonstrate that signaling between angiopoietin (Angpt) and the Angpt receptor Tie2, which is critical for SC formation, is also indispensable for maintaining SC integrity during adulthood...
September 18, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28920923/all-tied-up-mechanisms-of-schlemm-s-canal-maintenance
#2
Jeremiah Bernier-Latmani, Tatiana V Petrova
Glaucoma is a leading cause of blindness, with an estimated world-wide prevalence of 3.5% in members of the population older than 40 years of age. Elevated intraocular pressure as the result of abnormal resistance to aqueous humor drainage is a major contributing, and the only preventable, factor in glaucoma development. Schlemm's canal (SC), a lymphatic-like vessel encircling the anterior portion of the eye, plays a key role in promoting aqueous humor outflow and maintenance of normal intraocular pressure...
September 18, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28913385/closed-internal-degloving-of-the-flank
#3
Lindsay F Remy, Jacob Azurdia, Ashraf Fansa, Nabil A Ebraheim
Originally described in 1853 by Dr. Morel-Lavellee, closed internal degloving injuries represent an important, although uncommon, source of morbidity in trauma patients. These injuries are typically the result of a shearing or crushing force that traumatically separates the skin and subcutaneous tissue from the underlying fat. This results in disruption of perforating blood vessels and lymphatics, leading to hematoma/seroma formation. We describe two cases in which industrial crush injuries resulted in lumbar transverse process fracture...
July 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/28911825/paving-the-rho-in-cancer-metastasis-rho-gtpases-and-beyond
#4
REVIEW
Sepp Jansen, Reinoud Gosens, Thomas Wieland, Martina Schmidt
Malignant carcinomas are often characterized by metastasis, the movement of carcinoma cells from a primary site to colonize distant organs. For metastasis to occur, carcinoma cells first must adopt a pro-migratory phenotype and move through the surrounding stroma towards a blood or lymphatic vessel. Currently, there are very limited possibilities to target these processes therapeutically. The family of Rho GTPases is an ubiquitously expressed division of GTP-binding proteins involved in the regulation of cytoskeletal dynamics and intracellular signaling...
September 11, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28910489/nucleoside-nucleotide-reverse-transcriptase-inhibitors-attenuate-angiogenesis-and-lymphangiogenesis-by-impairing-receptor-tyrosine-kinases-signalling-in-endothelial-cells
#5
Lin Song, Sha Ding, Zhen Ge, Xiaolong Zhu, Cong Qiu, Yuewen Wang, Enyin Lai, Weijun Yang, Yi Sun, Samson A Chow, Luyang Yu
BACKGROUND AND PURPOSE: Cardiovascular disease associated with antiretroviral therapy (ART) has become a major clinical challenge for HIV-positive patients. However, the role of ART in blood vessel growth is largely unknown. Here, we examined an integral component of ART, nucleoside/nucleotide reverse transcriptase inhibitors (NRTIs), and investigated their effects on key microvascular functions, including angiogenesis and lymphangiogenesis. EXPERIMENTAL APPROACH: The angiogenesis/lymphangiogenesis capability of endothelial cells (ECs) was evaluated using migration, proliferation and tube formation assays in vitro, and mouse ear and Matrigel plug assays in vivo...
September 14, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28903061/lymphatic-drainage-system-of-the-brain-a-novel-target-for-intervention-of-neurological-diseases
#6
REVIEW
Bao-Liang Sun, Li-Hua Wang, Tuo Yang, Lei-Lei Mao, Jing-Yi Sun, Ming-Feng Yang, Hui Yuan, Robert A Colvin, Xiao-Yi Yang
The belief that the vertebrate brain functions normally without classical lymphatic drainage vessels has been held for many decades. On the contrary, new findings show that functional lymphatic drainage does exist in the brain. The brain lymphatic drainage system is composed of basement membrane-based perivascular pathway, a brain-wide glymphatic pathway, and cerebrospinal fluid (CSF) drainage routes including sinus-associated meningeal lymphatic vessels and olfactory/cervical lymphatic routes. The brain lymphatic systems function physiological as a route of drainage for interstitial fluid (ISF) from brain parenchyma to nearby lymph nodes...
September 10, 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/28900118/arf6-in-lymphatic-endothelial-cells-regulates-lymphangiogenesis-by-controlling-directional-cell-migration
#7
Yueh-Chien Lin, Norihiko Ohbayashi, Tsunaki Hongu, Naohiro Katagiri, Yuji Funakoshi, Hsinyu Lee, Yasunori Kanaho
The small GTPase Arf6 plays pivotal roles in a wide variety of cellular events such as endocytosis, exocytosis, and actin cytoskeleton reorganization. However, the physiological functions of Arf6 at the whole animal level have not yet been thoroughly understood. Here, we show that Arf6 regulates developmental and tumor lymphangiogenesis in mice. Lymphatic endothelial cell (LEC)-specific Arf6 conditional knockout (LEC-Arf6 cKO) mouse embryos exhibit severe skin edema and impairment in the formation of lymphatic vessel network at the mid-gestation stage...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899738/angiomyomatous-hamartoma-of-lymph-nodes-revisited-clinico-pathologic-study-of-21-cases-emphasizing-its-distinction-from-lymphangioleiomyomatosis-of-lymph-nodes
#8
Michelle Moh, Ankur Sangoi, Joseph T Rabban
Angiomyomatous hamartoma of lymph nodes (AMH-LN) is an uncommon benign proliferation of smooth muscle, blood vessels, collagenous stroma and adipocytes, most commonly affecting inguinal LN. A similar constellation of cell types constitutes various members of the perivascular epithelioid cell tumor (PEComa) family, including lymphangioleiomyomatosis (LAM) which can involve LN in women. Because some LN-LAM patients have tuberous sclerosis complex (TSC) and/or other PEComa family lesions, it is clinically relevant to distinguish LN-LAM from AMH-LN...
September 9, 2017: Human Pathology
https://www.readbyqxmd.com/read/28898672/a-bmpy-road-for-venous-development
#9
Lauren M Goddard, Mark L Kahn
Detailed molecular pathways for the specific growth of arteries and lymphatic vessels have been identified, but the mechanisms controlling venous vessel growth have been obscure. Tischfield and colleagues (2017) shed new light on this problem by identifying a role for BMP signaling in development of the cerebral venous system.
September 11, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28888665/fish-scale-derived-collagen-patch-promotes-growth-of-blood-and-lymphatic-vessels-in-vivo
#10
Jun Kit Wang, Kim Pin Yeo, Yong Yao Chun, Timothy Thatt Yang Tan, Nguan Soon Tan, Véronique Angeli, Cleo Choong
In this study, Type I collagen was extracted from fish scales as a potential alternative source of collagen for tissue engineering applications. Since unmodified collagen typically has poor mechanical and degradation stability both in vitro and in vivo, additional methylation modification and 1,4-butanediol diglycidyl ether (BDE) crosslinking steps were used to improve the physicochemical properties of fish scale-derived collagen. Subsequently, in vivo studies using a murine model demonstrated the biocompatibility of the different fish scale-derived collagen patches...
September 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28886898/the-differential-organogenesis-and-functionality-of-two-liver-draining-lymph-nodes-in-mice
#11
Jiali Yu, Yongyan Chen, Yuzhang Wu, Lilin Ye, Zhexiong Lian, Haiming Wei, Rui Sun, Zhigang Tian
The liver is an immunological organ. However, fundamental knowledge concerning liver-draining lymph nodes (LNs), which have been newly identified in mice as the portal and celiac LNs, is still lacking. Here, we revealed that the portal LN and celiac LN drain liver lymph through different lymphatic vessels. Although both the portal LN and celiac LN possess typical structures, they have different cell compositions. Interestingly, these two LNs form at different times during fetal development. Moreover, the organogenesis of the celiac LN, but not the portal LN, is controlled by the transcription factor NFIL3...
September 5, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28883015/mouse-models-of-metastasis-progress-and-prospects
#12
REVIEW
Laura Gómez-Cuadrado, Natasha Tracey, Ruoyu Ma, Binzhi Qian, Valerie G Brunton
Metastasis is the spread of cancer cells from a primary tumor to distant sites within the body to establish secondary tumors. Although this is an inefficient process, the consequences are devastating as metastatic disease accounts for >90% of cancer-related deaths. The formation of metastases is the result of a series of events that allow cancer cells to escape from the primary site, survive in the lymphatic system or blood vessels, extravasate and grow at distant sites. The metastatic capacity of a tumor is determined by genetic and epigenetic changes within the cancer cells as well as contributions from cells in the tumor microenvironment...
September 1, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28880889/loss-of-kaiso-expression-in-breast-cancer-cells-prevents-intra-vascular-invasion-in-the-lung-and-secondary-metastasis
#13
Jacek M Kwiecien, Blessing I Bassey-Archibong, Wojciech Dabrowski, Lyndsay G Rayner, Alexandra R Lucas, Juliet M Daniel
The metastatic activity of breast carcinomas results from complex genetic changes in epithelial tumor cells and accounts for 90% of deaths in affected patients. Although the invasion of the local lymphatic vessels and veins by malignant breast tumor cells and their subsequent metastasis to the lung, has been recognized, the mechanisms behind the metastatic activity of breast tumor cells to other distal organs and the pathogenesis of metastatic cancer are not well understood. In this study, we utilized derivatives of the well-established and highly metastatic triple negative breast cancer (TNBC) cell line MDA-MB-231 (MDA-231) to study breast tumor metastasis in a mouse model...
2017: PloS One
https://www.readbyqxmd.com/read/28879690/design-principles-for-lymphatic-drainage-of-fluid-and-solutes-from-collagen-scaffolds
#14
Rebecca L Thompson, Emily A Margolis, Tyler J Ryan, Brent J Coisman, Gavrielle M Price, Keith H K Wong, Joe Tien
In vivo, tissues are drained of excess fluid and macromolecules by the lymphatic vascular system. How to engineer artificial lymphatics that can provide equivalent drainage in biomaterials remains an open question. The current study elucidates design principles for engineered lymphatics, by comparing the rates of removal of fluid and solute through type I collagen gels that contain lymphatic vessels or unseeded channels, or through gels without channels. Surprisingly, no difference was found between the fluid drainage rates for gels that contained vessels or bare channels...
September 6, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28878876/an-unusual-case-of-disappearing-bone-disease-in-the-mandible-and-literature-review
#15
Ambareen A Naqvi, Sandeep S Joshi, Edmund Bailey
Disappearing bone disease is a rare disorder that causes spontaneous and progressive osteolysis and proliferation of lymphatic tissue and blood vessels. It is debilitating and there is evidence of mortality in reported cases including those affecting mandible. A 38-year-old man was diagnosed with disappearing bone disease of the mandible in 2013. This had progressed from being in the right ramus only, and now extends to the lower right first molar and affects the left coronoid process and ramus. Mandibular involvement has shown to be high-risk...
February 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28877360/improvement-of-the-efficacy-of-vascularized-lymph-node-transfer-for-lower-extremity-lymphedema-via-a-prefabricated-lympho-venous-shunt-through-lymphaticovenular-anastomosis-between-the-efferent-lymphatic-vessel-and-small-vein-in-the-elevated-vascularized-lymph
#16
Shinsuke Akita, Yoshihisa Yamaji, Hideki Tokumoto, Yoshitaro Sasahara, Yoshitaka Kubota, Motone Kuriyama, Nobuyuki Mitsukawa
BACKGROUND: Following vascularized lymph node (VLN) transfer (VLNT), the VLN may be at a risk for sclerosis because of efferent lymphatic vessel obstruction. We developed a new technique to prevent VLN sclerosis via a prefabricated lympho-venous (LV) shunt. This study compared the treatment outcomes of single VLNT with prefabricated LV shunt, conventional multiple VLNTs, and conventional single VLNT. METHODS: Overall, 47 limbs of 45 patients that underwent VLNT for lower-extremity lymphedema (LEL) in late clinical stage II/III were divided into 3 groups: conventional single VLNT group (control; 21 limbs where 4 had primary LEL), multiple VLNTs group (13 limbs where 3 had primary LEL), and prefabricated LV shunt group (13 limbs where 4 had primary LEL)...
September 6, 2017: Microsurgery
https://www.readbyqxmd.com/read/28875528/transplantation-of-artificial-human-lymphatic-vascular-tissues-fabricated-using-a-cell-accumulation-technique-and-their-engraftment-in-mouse-tissue-with-vascular-remodeling
#17
Yoshiya Asano, Hiroshi Shimoda, Michiya Matsusaki, Mitsuru Akashi
Transplantation of engineered tissues with microvascular structure is advancing towards therapeutic application to improve the flow of blood and/or lymphatic fluids. In lymphatic disorders, transplantation of tissue-engineered lymphatic grafts can be an ideal treatment for draining excessive lymphatic fluid. In this study, we examined the transplantation of three-dimensional artificial human lymphatic network tissue (AHLT) fabricated by the cell accumulation technique into the subcutaneous tissue and fascia of mice...
September 6, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28872570/when-fever-leukocytosis-and-right-lower-quadrant-pain-is-not-appendicitis
#18
Jeanette Kurbedin, Lawrence Haines, Marla C Levine, Eitan Dickman
Mesenteric cystic lymphangioma (MCL) is an uncommon, benign, slow-growing abdominal tumor that is derived from the lymphatic vessels (World J Gastroenterol. 2012;18:6328-6332, Radiographics. 1994;14:729-737). It is most often diagnosed in the head and neck of affected children. Rarely, a lymphangioma can develop within the small bowel (Pan Afr Med J. 2012;12:7). The clinical presentation of patients with an abdominal MCL can range from asymptomatic to acute abdominal pain (J Korean Surg Soc. 2012;83:102-106)...
September 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28871809/iodine-concentration-in-spectral-ct-assessment-of-prognostic-determinants-in-patients-with-gastric-adenocarcinoma
#19
Pan Liang, Xiu-Chun Ren, Jian-Bo Gao, Kui-Sheng Chen, Xiao Xu
OBJECTIVE: The purpose of this study was to use virtual monochromatic spectral CT to investigate the usefulness of iodine concentration (IC) and its correlation with clinicopathologically determined prognostic factors in gastric adenocarcinoma. SUBJECTS AND METHODS: From June 2012 to March 2015, 34 patients with gastric adenocarcinoma underwent arterial and portal venous phase spectral CT. The ICs in the arterial and portal venous phases were calculated and then normalized with the aorta as normalized IC (NIC)...
September 5, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28869350/utilising-lymphatic-cell-markers-to-visualise-human-lymphatic-abnormalities
#20
REVIEW
Zerina Lokmic
The in vivo visualisation of the human lymphatic system is limited by the mode of delivery of tracing agents, depth of field and size of the area examined, and specificity of the cell markers used to distinguish lymphatic endothelium from the blood vessels and the surrounding tissues. These limitations are particularly problematic when imaging human lymphatic abnormalities. Firstly, limited understanding of the lymphatic disease aetiology exists with respect to genetic causes and phenotypic presentations. Secondly, the ability of a tracer to reach the entire lymphatic network within the diseased tissue is suboptimal...
September 4, 2017: Journal of Biophotonics
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