Ultrastructure of the Lymph System of the Trematode Megalodiscus temperatus

1973 ◽  
Vol 92 (4) ◽  
pp. 570 ◽  
Author(s):  
Patricia A. Strong ◽  
Burton J. Bogitsh
Keyword(s):  
Lymph System

scholarly journals Degradation Behavior, Transport Mechanism and Osteogenic Activity of Mg–Zn–RE Alloy Membranes in Critical-Sized Rat Calvarial Defects

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 496
Author(s):  
Mingyu Zhao ◽  
Guanqi Liu ◽  
Ying Li ◽  
Xiaodong Yu ◽  
Shenpo Yuan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Transport Mechanism ◽  
Degradation Process ◽  
Lymph System ◽  
Transmission Electron ◽  
Calvarial Defects ◽  
Rat Calvarial Defect

In this study, a specific Mg–Zn–RE alloy membrane with 6 wt.% zinc and 2.7 wt.% rare earth elements (Y, Gd, La and Ce) was prepared to investigate implant degradation, transport mechanism and guide bone regeneration in vivo. The Mg-membrane microstructure and precipitates were characterized by the scanning electron microscopy (SEM) and the transmission electron microscopy (TEM). The Mg-membrane degradation process and effect on osteogenesis were investigated in a critical-sized rat calvarial defect model via micro-CT examination and hard tissue slicing after 2-, 5- and 8-week implants. Then, the distribution of elements in organs after 1-, 2- and 4-weeks implantation was examined to explore their transportation routes. Results showed that two types of precipitates had formed in the Mg–membrane after a 10-h heat treatment at 175 °C: γ-phase MgZn precipitation with dissolved La, Ce and Gd, and W-phase Mg3(Y, Gd)2Zn3 precipitation rich in Y and Gd. In the degradation process of the Mg-membrane, the Mg matrix degraded first, and the rare earth-rich precipitation particles were transferred to a more stable phosphate compound. The element release rate was dependent on the precipitate type and composition. Rare earth elements may be transported mainly through the lymph system. The defects were repaired rapidly by the membranes. The Mg-membrane used in the present study showed excellent biocompatibility and enhanced bone formation in the vicinity of the implants.

The Role of Lymphatics in Cholestasis: A Comprehensive Review

2020 ◽  
Vol 40 (04) ◽  
pp. 403-410
Author(s):  
April O'Brien ◽  
Olga Gasheva ◽  
Gianfranco Alpini ◽  
David Zawieja ◽  
Anatoliy Gashev ◽  
...  
Keyword(s):  
Liver Disease ◽  
Lymphatic System ◽  
Abdominal Cavity ◽  
Biological Response ◽  
Vital Role ◽  
Cholestatic Liver Disease ◽  
Hepatic Decompensation ◽  
Lymph System ◽  
Lymphatic Organ

AbstractCholestatic liver disease affects millions of people worldwide and stems from a plethora of causes such as immune dysfunction, genetics, cancerous growths, and lifestyle choices. While not considered a classical lymphatic organ, the liver plays a vital role in the lymph system producing up to half of the body's lymph per day. The lymphatic system is critical to the health of an organism with its networks of vessels that provide drainage for lymphatic fluid and routes for surveilling immune cells. Cholestasis results in an increase of inflammatory cytokines, growth factors, and inflammatory infiltrate. Left unchecked, further disease progression will include collagen deposition which impedes both the hepatic and lymphatic ducts, eventually resulting in an increase in hepatic decompensation, increasing portal pressures, and accumulation of fluid within the abdominal cavity (ascites). Despite the documented interplay between these vital systems, little is known about the effect of liver disease on the lymph system and its biological response. This review looks at the current cholestatic literature from the perspective of the lymphatic system and summarizes what is known about the role of the lymph system in liver pathogenesis during hepatic injury and remodeling, immune-modulating events, or variations in interstitial pressures.

Studies on the ultrastructure and histochemistry of the lymph system in three species of amphistome (Trematoda: Digenea) Gigantocotyle explanatum, Gastrothylax crumenifer and Srivastavaia indica from the Indian Water Buffalo Bubalus bubalis

1985 ◽  
Vol 59 (1) ◽  
pp. 1-18 ◽  
Author(s):  
T. S. Dunn ◽  
W. A. Nizami ◽  
R. E. B. Hanna
Keyword(s):  
Amino Acids ◽  
Bubalus Bubalis ◽  
The Body ◽  
Oxygen Storage ◽  
Single Pair ◽  
Indian Water ◽  
Golgi Bodies ◽  
Lymph System ◽  
Gastrothylax Crumenifer ◽  
Lateral Branches

AbstractThe lymph system of three amphistome parasites from buffaloes, Gigantocotyle explanatum, Gastrothylax crumenifer and Srivastavaia indica was studied using light microscope histochemistry and electron microscopy. In each case the system comprised a single pair of main longitudinal vessels which gave rise to numerous sub-dividing lateral branches. Although the finer lymph channels associated with most internal systems, they did not penetrate the basement membrane of any organ. The lymph vessels were delimited by a unit membrane and separated from adjacent cells by interstitial material. The lymph fluid consisted of an amorphous proteinaceous, lipid-rich matrix, containing naked nuclei and granules of various sizes. Complexes of endoplasmic reticulum were frequently associated with the nuclei. No distinct Golgi bodies or mitochondria were evident. The granules noted throughout the lymph morphologically resembled autophagosomes and lysosomes. Autophagy within the lymph system presumably mobilizes amino acids for subsequent transport to tissues undergoing active protein synthesis. The lymph channels displayed an intimate relationship with the general parenchyma. In particular, numerous protrusions of lymph occurred into the cytoplasm of certain specialized parenchymal cells surrounding the pharynx. Within these ‘juxtapharyńigeal’ cells autophagic degradation of sequestered lymph cytoplasm apparently occurred. In the three species of amphistome studied, the lymph system appears to function in storage and mobilization of amino acids and possibly lipids. It may also serve to distribute other small molecules throughout the body. The detection of haemoglobin in the lymph system of G. crumenifer and S. indica, but not in Gigantocotyle explanatum, suggests a further role in oxygen storage and transport.

scholarly journals Protein enhanced NIR-IIb emission of indocyanine green for functional bioimaging

2020 ◽  
Author(s):  
Mubin He ◽  
Di Wu ◽  
Yuhuang Zhang ◽  
Xiaoxiao Fan ◽  
Hui Lin ◽  
...  
Keyword(s):  
Indocyanine Green ◽  
Fluorescence Imaging ◽  
Clinical Application ◽  
Spatial Resolution ◽  
Near Infrared ◽  
Protein Solutions ◽  
Lymph System ◽  
Fetal Bovine ◽  
Auto Fluorescence

AbstractFluorescence imaging performed in the 1500-1700 nm spectral range (labeled as near-infrared IIb, NIR-IIb) promises high imaging contrast and spatial resolution for its little photon scattering effect and minimum auto-fluorescence. Though inorganic and organic probes have been developed for NIR-IIb bioimaging, most are in preclinical stage, hampering further clinical application. Herein, we showed that indocyanine green (ICG), an US Food and Drug Administration (FDA)-approved agent, exhibited remarkable amount of NIR-IIb emission when dissolved into different protein solutions, including human serum albumin, rat bile, and fetal bovine serum. We performed fluorescence imaging in NIR-IIb window to visualize structures of lymph system, extrahepatic biliary tract and cerebrovascular. Results demonstrated that proteins promoted NIR-IIb emission of ICG in vivo and that NIR-IIb imaging with ICG preserved higher signal-to-background ratio (SBR) and spatial resolution compared with the conventional near-infrared II (NIR-II) fluorescence imaging. Our findings confirm that NIR-IIb fluorescence imaging can be successfully performed using the clinically approved agent ICG. Further clinical application in NIR-IIb region would hopefully be carried out with appropriate ICG-protein solutions.

scholarly journals Responses of the vascular-interstitial-lymph system to saline loading in the rat.

1984 ◽  
Vol 34 (4) ◽  
pp. 575-586 ◽  
Author(s):  
Seiji YAMADA ◽  
Taketoshi MORIMOTO ◽  
Hiroshi NOSE ◽  
Kanae OGURA
Keyword(s):  
Lymph System ◽  
Saline Loading

Some Observations on the Behaviour of Nippostrongylus brasiliensis in different kinds of Laboratory Animals

1961 ◽  
Vol 35 (1-2) ◽  
pp. 109-114 ◽  
Author(s):  
H. M. Gharib
Keyword(s):  
Life Span ◽  
The Body ◽  
Laboratory Animals ◽  
Nippostrongylus Brasiliensis ◽  
Experimental Animals ◽  
Lymph Glands ◽  
Lymph System ◽  
Rats And Mice

(1) Rats and mice are specific hosts to N. brasiliensis.(2) The life span of the parasite may reach up to 100 days in the rat but is much shorter in other experimental animals.(3) Chickens do not become infected with this parasite.(4) It was found that the route of migration of this parasite inside the body to the lungs was via the lymph system and not via the blood in all experimental animals.(5) The larvae, after application to the skin, reach the lymph glands draining the site of infection, not before 12 hours ; and they reach the lungs at 18 hours after exposure to infection.

scholarly journals Primo Vascular System in the Lymph Vessel from the Inguinal to the Axillary Nodes

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Seung Hwan Lee ◽  
Kyoung-Hee Bae ◽  
Geum Ock Kim ◽  
Min Ho Nam ◽  
Young Bok Choi ◽  
...  
Keyword(s):  
Vascular System ◽  
Vena Cava ◽  
Lymph Vessel ◽  
Severe Damage ◽  
Long Period ◽  
Axillary Nodes ◽  
Lymph System ◽  
New Perspective ◽  
Removal Of Fat ◽  
Rats And Mice

The primo vascular system (PVS) in a lymph system was observed mostly in large caliber ducts around the caudal vena cava of rabbits, rats, and mice. This required a severe surgery with laparectomy and massive removal of fat tissues in the abdomen to expose the lymph vessel. In the current brief report, we presented a new method to evade these shortcomings by observing the PVS in a less large caliber duct in the skin, that is, the lymph vessel from the inguinal to the axillary nodes. The Alcian blue injection into the inguinal node revealed the desired primo vessel in the target lymph vessel. This opened a new perspective for the investigation of the lymphatic PVS without severe damage to subject animals and for monitoring of the PVS in a long period of time.

scholarly journals Observation of a Long Primo Vessel in a Lymph Vessel from the Inguinal Node of a Rabbit

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Young-Il Noh ◽  
Yeong-Min Yoo ◽  
Ran-Hyang Kim ◽  
Ye-Ji Hong ◽  
Hye-Rie Lee ◽  
...  
Keyword(s):  
Lymph Node ◽  
Alcian Blue ◽  
Vascular System ◽  
Inguinal Lymph Node ◽  
Average Length ◽  
Functional Integration ◽  
Lymph Vessel ◽  
Blue Dye ◽  
Lymph Vessels ◽  
Lymph System

Though primo vessels are frequently found in the lymph near the abdominal aorta of rabbit by Alcian blue dye, the reproductions are still difficult to require considerable skills and technical know-how at dissected tissue of animal species. However, in the inguinal lymph node of a rabbit we found a long-type primo vascular system (LTP) dyed with Alcian blue, from an abdominal lymph vessel to an inguinal lymph node. The length of LTP was over an average length of 9.1 cm. The average diameters of the primo and the lymph vessels were about 23.9 μm and 242 μm, respectively. The primo vessels were not floating but adhered to lymph vessels with fascial connective tissue. These primo vessels might be a functional integration in the lymph system.

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