Ultrastructure of the cysts of Sarcocystis rangiferi from skeletal muscle of reindeer (Rangifer tarandus tarandus)

1985 ◽  
Vol 63 (11) ◽  
pp. 2669-2675 ◽  
Author(s):  
Bjørn Gjerde
Keyword(s):  
Skeletal Muscle ◽  
Connective Tissue ◽  
Rangifer Tarandus ◽  
Thick Layer ◽  
Ground Substance ◽  
Connective Tissue Capsule ◽  
Rangifer Tarandus Tarandus ◽  
Transmission Electron ◽  
Cyst Membrane ◽  
Tissue Capsule

Cysts of Sarcocystis rangiferi from reindeer (Rangifer tarandus tarandus) were examined by transmission electron microscopy. The cysts were located within skeletal muscle cells which were encapsulated by a thick layer of connective tissue. The connective tissue capsule consisted of numerous fibroblasts and a matrix with a moderate number of collagen fibrils, and represents an analogue of the so-called secondary cyst wall of Sarcocystis gigantea and various Besnoitia species. The cysts were limited by a unit membrane, the cyst membrane, which in part was reinforced by a thin subjacent layer of electron-dense material. The cyst surface was covered by closely packed, villiform protrusions, measuring 12–14 μm in length and 8 μm in diameter. The cyst membrane formed vesiclelike invaginations at and between the bases of the protrusions. Cyst ground substance divided the interior of the cyst into numerous compartments containing metrocytes or cystozoites. The cystozoites multiplied by endodyogeny.

Ultrastructure of the cysts of Sarcocystis hardangeri from skeletal muscle of reindeer (Rangifer tarandus tarandus)

1985 ◽  
Vol 63 (11) ◽  
pp. 2676-2683 ◽  
Author(s):  
Bjørn Gjerde
Keyword(s):  
Skeletal Muscle ◽  
Rangifer Tarandus ◽  
Thick Layer ◽  
Ground Substance ◽  
Unit Membrane ◽  
Rangifer Tarandus Tarandus ◽  
Transmission Electron ◽  
Central Bundle ◽  
Cyst Membrane ◽  
Honeycomb Pattern

Cysts of Sarcocystis hardangeri from reindeer (Rangifer tarandus tarandus) were examined by transmission electron microscopy. The large ovoid cysts were located within distended skeletal muscle cells, which were encapsulated by the thickened external lamina of the muscle cell and an exterior thick layer of collagen-rich connective tissue. The cysts were limited by a unit membrane (the cyst membrane) that was raised into closely spaced anastomosing microplicae, forming a honeycomb pattern. Between the microplicae the cyst membrane formed vesiclelike invaginations. The cyst surface was provided with numerous slanting linguiform processes, measuring 25–35 μm in length. The entire cyst surface, including the surface of the projections, had a highly irregular, folded outline. The projections contained a central bundle of longitudinally orientated microtubules. The interior of the cyst was rich in cyst ground substance that formed conspicuous septa. The metrocytes showed an extensive vacuolation of their cytoplasm, eventually leading to a disintegration of the cell. The cysts of S. hardangeri were structurally very similar to one type of sarcocysts previously reported from moose (Alces alces).

Ultrastructure of the cysts of Sarcocystis tarandi from skeletal muscle of reindeer (Rangifer tarandus tarandus)

1985 ◽  
Vol 63 (12) ◽  
pp. 2913-2918 ◽  
Author(s):  
Bjørn Gjerde
Keyword(s):  
Skeletal Muscle ◽  
Rangifer Tarandus ◽  
Thick Layer ◽  
Ground Substance ◽  
Electron Dense Material ◽  
The Core ◽  
Dense Bodies ◽  
Rangifer Tarandus Tarandus ◽  
Transmission Electron ◽  
Cyst Membrane

Cysts of Sarcocystis tarandi from Rangifer tarandus tarandus were examined by transmission electron microscopy. The cysts were located within skeletal muscle cells and were limited by a unit membrane (the cyst membrane). The surface of the cyst was covered with densely packed, erect, villiform processes measuring 10.4 μm in length and 2.5 μm in diameter. The processes contained numerous longitudinally oriented microtubules. The cyst membrane was reinforced by an underlying 20–65 nm thick layer of electron-dense material, except at numerous points between the bases of the protrusions where it formed vesiclelike invaginations. Cyst ground substance formed a layer at the periphery of the cyst, filled the core of the projections, and formed septa that divided the cyst into many compartments. The compartments contained either cystozoites or metrocytes. The metrocytes possessed one or a few large dense bodies containing crystalline inclusions. The cystozoites multiplied by endodyogeny.

scholarly journals Ultrastructure of the cysts of Sarcocystis rangi from skeletal muscle of reindeer (Rangifer tarandus tarandus)

Rangifer ◽  
1985 ◽  
Vol 5 (2) ◽  
pp. 43 ◽  
Author(s):  
Bjørn Gjerde
Keyword(s):  
Skeletal Muscle ◽  
Thin Layer ◽  
Smooth Surface ◽  
Rangifer Tarandus ◽  
Ground Substance ◽  
Sarcocystis Species ◽  
Intermediate Hosts ◽  
The Core ◽  
Transmission Electron ◽  
Cyst Membrane

<p>Mature muscle cysts of Sarcocystis rangi from Rangifer tarandus were examined by transmission electron microscopy. The long and slender cysts were located within skeletal muscle cells, and were bounded by a unit membrane, the cyst membrane. The cysts were provided with closely spaced flexible, hairlike surface processes, measuring up to 12.6 |im in length and 0.3 to 0.6 \lm in diameter. The projections had a smooth surface, whereas the cyst membrane formed numerous hexagonally packed vesicular invaginations between the bases of the projections. The cyst membrane was reinforced by an underlying thin layer of electron-dense material, except at the points where it was invaginated. Cyst ground substance formed a thin layer at the periphery of the cysts, filled the core of the projections, and formed thin septa that divided the interior of the cysts into numerous compartments. Most compartments contained a large number of tightly packed cystozoites, whereas a few metrocytes were forund in each of a few compartments at the periphery of the cysts. Some of the cystozoites multiplied by endodyogeny. The metrocytes displayed a vacuolation of their cytoplasm. The cysts of S. rangi were similar in surface morphology to the sarcocysts of certain other Sarcocystis species reported from other intermediate hosts.</p><p>Ultrastrukturen til cyster av Sarcocystis rangi fr&aring; skjelettmuskulaturen hos rein.</p><p>Abstract in Norwegian / Samandrag: Muskelcyster av S. rangi fr&aring; rein vart unders&oslash;kt ved transmisjonselektronmikroskopi. Dei lange cystene l&aring;g intracellul&aelig;rt i skjelettmuskelceller, og var avgrensa av ein element&aelig;rmembran, cystemembranen. Cystene var utstyrt med talrike h&aring;rliknande overflateprosessar, som strekte seg langsetter cysteoverflata. Prcsessane var opptil 12.6 Hm lange, og m&aring;lte 0.3 til 0.6 \lm i diameter. Prosessane hadde ei glatt overflate, medan cystemembranen danna talrike regelmessige ordna, sm&aring; invaginasjonar innimellom basis av prosessane. Cystemembranen var forsterka p&aring; innsida av eit tunnt lag av elektrontett materiale, med unnatak av dei stadene der han var invaginert. Cystegrunnsubstans danna eit lag perifert i cystene, fylte det indre av prosessane, og danna septa som delte cystene inn i talrike kammer. Dei fleste kammera inneheldt cystozoitar, medan metrocytar fannst i nokre f&aring;, sm&aring; kammer perifert i cystene. Nokre av cystozoitane gjennomgjekk ei todeling ved endodyogeni. Mange metrocytar hadde eit vakuolisert cytoplasma. Cystene til S. rangi var sv&aelig;rt like cystene til visse Sarcocystis-3.net fr&aring; andre mellomvertar med omsyn til overflatemorfologi.</p>

Prenatal undernutrition increases fat deposition and collagen content within skeletal muscle in the porcine fetus

2005 ◽  
Vol 2005 ◽  
pp. 37-37
Author(s):  
J. Karunaratne ◽  
C. Ashton ◽  
N.C. Stickland
Keyword(s):  
Skeletal Muscle ◽  
Connective Tissue ◽  
Meat Quality ◽  
Primary Objective ◽  
Fat Deposition ◽  
Collagen I ◽  
Ground Substance ◽  
Meat Industry ◽  
Pilot Studies ◽  
Fat Deposits

Connective tissue content of skeletal muscle plays a key role in meat quality. Previous pilot studies carried out in our lab have indicated that the smallest littermate may have a higher proportion of connective tissue in skeletal muscle (Clelland A., 2001). Connective tissue provides a structure to the muscle belly and is composed of ground substance, fibres and connective tissue cells. A proportion of these three elements of the connective tissue comprise of collagen I and fat deposits. This is an important concept to the meat industry as an increased amount of these components can increase meat toughness and intramuscular fat respectively, both having an impact on the resultant meat quality. The primary objective of this study is to investigate the relationship between undernutrition, collagen and fat content using a naturally occurring model. In the pig, it can be argued that differing levels of nutrition received, in utero, are a major cause of intra-litter variation. Therefore the smallest and largest littermates were chosen and content of collagen I and fat deposition were analysed in the M. semitendinosus of both.

scholarly journals A Quiescent Colossal Radicular Cyst: A Diverse Histological Presentation

2013 ◽  
Vol 4 (4) ◽  
pp. 286-290
Author(s):  
V Reshma ◽  
Radhika M Bavle ◽  
BK Varsha ◽  
BM Kavya
Keyword(s):  
Connective Tissue ◽  
Periodontal Ligament ◽  
Radicular Cyst ◽  
Cell Infiltrate ◽  
Jaw Cysts ◽  
Connective Tissue Capsule ◽  
Tissue Capsule

ABSTRACT Radicular cysts are the most frequent inflammatory cysts comprising of about 52 to 68% of all the jaw cysts. It arises from the epithelial residues in the periodontal ligament space following pulpal necrosis. The distinguished lining of the cystic lumen is hyperplastic stratified squamous nonkeratinizing epithelium showing arcading pattern with dense infammatory cell infiltrate, cholesterol clefts, Russell bodies and Ruston bodies in the connective tissue capsule. Here, we present an unusual large radicular cyst lined almost entirely by quiescent atrophic epithelium, which is innocuous, persistent, has enlarged overtime, with minimal infammatory cells in the connective tissue capsule. How to cite this article Reshma V, Bavle RM, Varsha BK, Kavya BM. A Quiescent Colossal Radicular Cyst: A Diver Histological Presentation. World J Dent 2013;4(4):286-290.

scholarly journals Implants and bone technology with the use of doped calcium carbonate phosphates

2020 ◽  
pp. 54-61
Author(s):  
L. F. Koroleva ◽  
◽  
L. P. Larionov ◽  
M. N. Dobrinskaya ◽  
◽  
...  
Keyword(s):  
Drug Delivery ◽  
Calcium Carbonate ◽  
Connective Tissue ◽  
Blood Vessels ◽  
Bone Repair ◽  
Living Organism ◽  
Nerve Endings ◽  
Histological Studies ◽  
Connective Tissue Capsule ◽  
Tissue Capsule

The possibility of obtaining an alloplastic biomaterial for the implant based on doped calcium carbonate-phosphates and polycaprolactone is studied. Nanocrystalline calcium carbonate-phosphate doped with cations of iron, magnesium, potassium, zinc, manganese, and silicon intended for bone repair by drug delivery is investigated. Histological studies have revealed that samples after 60 days in a living organism are covered by a connective tissue capsule. The formation of blood vessels and nerve endings is observed in the capsule.

scholarly journals SOME TOPOGRAPHICAL AND HISTOLOGICAL STUDIES OF THYROID AND PARATHYROD GLANDS OF MOORHEN (Gallinula c. chloropus)

2021 ◽  
Vol 22 (1) ◽  
pp. 85-96
Author(s):  
K.K. Kadhim ◽  
N.S. Al-Samarrae ◽  
J.Y. Al-Fayas
Keyword(s):  
Thyroid Gland ◽  
Connective Tissue ◽  
Parathyroid Glands ◽  
Histological Studies ◽  
Connective Tissue Capsule ◽  
Small Branch ◽  
Thyroid Glands ◽  
The Common ◽  
Parenchymal Cells ◽  
Tissue Capsule

 The thyroid gland of Moorhen has two separated lobes. These lobes were located in the throracic inlet and receive blood supply from the cranial, middle and caudal thyroid arteries. The histological organization of the thyroid gland in Moorhen is surrounded by a distinct connective tissue capsule and the parenchymal cells were arranged into colloid filled follicles enmeshed in the highly vascular interstitial connective tissue. The bilaterally paired, round to oval, parathyroid glands in Moorhen were located intrathoracically near or close to the caudal pole of the thyroid glands. They receive blood by short branches from caudal thyroid artery and small branch from the common carotid artery. The parathyroid glands in Moorhen have a thin connective tissue capsule. Its parenchymal cells were arranged into an irregular, anastomosing cords of chief cells. No oxyphil cells were found in the parathyroid glands of Moorhen.

Evaluation of biocompatibility of an experimental membrane for glucose sensors: the results of a prospective experimental controlled preclinical study involving laboratory animals

2017 ◽  
Vol 63 (4) ◽  
pp. 219-226 ◽  
Author(s):  
Yaroslav M. Stanishevskiy ◽  
Nadezhda P. Sachivkina ◽  
Yuriy V. Tarasov ◽  
Yury I. Philippov ◽  
Sergey A. Sokolov ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Membrane Surface ◽  
Glucose Sensors ◽  
Laboratory Animals ◽  
Skin Reactions ◽  
Inflammatory Reactions ◽  
Connective Tissue Capsule ◽  
Coated Membranes ◽  
Coated Membrane ◽  
Tissue Capsule

An increase in the accuracy of monitoring of glucose concentration indicators and an increase in the running time of glucose sensors are promising directions in the field of diabetology. One of the ways to extend the lifetime of a sensor is its complete implantation excluding direct communication with the skin surface. For effective long-term functioning in the patient’s body, the surface of an implantable sensor should be highly biocompatibile: it should not induce allergic and inflammatory reactions as well as the demarcation reaction (formation of a dense connective tissue capsule). Earlier, a group of authors developed a glucose-permeable membrane and a biocompatible coating comprising a complex of nadroparin with transesterified polyethylene glycol and γ-aminopropyl triethoxysilane, which formed a protein repellent hydrogel on the membrane surface. Aims. To evaluate the biocompatibility of the experimental coated membrane implanted into laboratory animals. Methods. The experimental prospective controlled study involved 60 laboratory animals (Wistar albino rats). The animals were divided into 3 groups of 20 animals each. Animals of each group were implanted with the standard, or experimental, or experimental coated membrane. After implantation, the skin condition in the implantation area was visually assessed for 90 days. After 90 days, the tissue condition around the implant was evaluated histologically. Results. No serious allergic or inflammatory reactions in the implantation area were detected in all three groups of animals within 90 days of the follow-up period. In the case of the experimental coated membrane, a significantly low score was graded based on visual assessment of the skin reactions. In the histological analysis, the tissue condition in the implantation area of the coated membranes was characterized by significantly lower density of a connective tissue capsule and the presence of vascularization areas at the contact between of the membrane surface and the surrounding tissue. Conclusion. In experimental animals, the tested coating significantly inhibits formation of a connective tissue capsule around the implant and reduces the intensity of skin reactions after implantation. Further clinical studies of coated membranes in humans are required to verify their biocompatibility.

Microsporidial Infection of English Sole, Parophrys vetulus

1969 ◽  
Vol 26 (8) ◽  
pp. 2215-2218 ◽  
Author(s):  
S. R. Wellings ◽  
L. E. Ashley ◽  
G. E. McArn
Keyword(s):  
Connective Tissue ◽  
Intermediate Layer ◽  
English Sole ◽  
Central Mass ◽  
Connective Tissue Capsule ◽  
Parophrys Vetulus ◽  
Tissue Capsule

Infection of two English sole, Parophrys vetulus, probably by Glugea hertwigi, is described. Numerous Glugea cysts (xenomas), measuring 0.5–1.0 mm in diameter, were located throughout the entire intestine distal to the stomach and including the pyloric caecae. A few cysts were located in the mesentery, pancreas, and liver. Microscopically, the cysts were composed of a hyaline connective tissue capsule, enclosing an intermediate layer of syncytium and a central mass of mature spores.

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