scholarly journals Морфологічні особливості кровоносних судин тимуса новонароджених телят

2017 ◽  
Vol 19 (82) ◽  
pp. 12-15
Author(s):  
Zh. Stegney
Keyword(s):  
Basement Membrane ◽  
Blood Vessels ◽  
Muscle Cells ◽  
Elastic Fibers ◽  
Involuntary Muscle ◽  
Calf Thymus ◽  
The Media ◽  
Thoracic Part ◽  
Newborn Calves ◽  
Arteries And Veins

The blood vessels of thymus of newborn calves were studied by using a complex of histological methods and methods of injection of blood vessels. Calf thymus gland is an unpaired organ consisting of a pair of cervical, unpaired cervical and thoracic lobes. Radiating insertions (septa) extrude from the capsule, dividing organ on lobules. Stroma (6.53 ± 2.33%) consists of loose connective tissue. The base of the lobules is formed by a lymphoid tissue (epithelial with cells of the lymphoid series). The area of the parenchyma of the diurnal calves’ thymus is 80.57 ± 3.46%. The thymus lobes consist of cortex (57.97 ± 3.38%) and medulla (22.60 ± 2.71%). There are concentric, nest-like bodies called Hassall's corpuscles in the medulla. The blood vessels of the thymus are interlobular and intralobular. Interlobular arteries are a continuation of extraorganic arteries. The diameter, caliber and thickness of the wall of arteries and veins, as well as microcirculatory vessels are different, which is due to functional activity. Some blood vessels branch out in the interlobular stroma, while others penetrate into the lobules, where they branch into microcirculatory vessels. In the cortex the blood vessels are radially branched, and in the medulla they form polygonal plexuses. Blood vessels of the thymus are represented by arteries, veins and microcirculatory vessels. The parameters of the wall of intralobular vessels are less than interlobular. The total area of the blood vessels of the thoracic part of the thymus is 12.89 ± 0.97%, interlobular – 4.28 ± 0.61% and intralobular – 8.61 ± 0.54%. The area of interlobular arteries is 11.71 ± 0.41%, which is slightly smaller than the area of interlobular veins (19.09 ± 0.86%).Microcirculatory vessels occupy the smallest area – 2.33 ± 0.05%. The area of intralobular arteries (9.60± 0.83%) is less, and the veins (22.08 ± 0.45%) are larger than interlobular. Microcirculatory vessels occupy the largest area in the lobe – 35.14 ± 0.88%. The wall of arteries and veins consists of intima, media and adventitia. Microcirculatory vessels are represented by arterioles, precapillaries, capillaries, postcapillaries and venules. The wall of arterioles consists of an intima, which is formed by endotheliocytes on the basement membrane, a media, which is made up principally of smooth (involuntary) muscle cells and elastic fibers arranged in roughly spiral layers, and an adventitia. The structure of the precapillary wall is similar to such in arterioles, but only single smooth muscle cells are in the media. The wall of capillaries and venous section of microcirculatory vessels are formed by endotheliocytes and the basement membrane. 

scholarly journals Ultrastructural immunolocalization of elastic fibers in rat blood vessels using the protein A-gold technique.

1987 ◽  
Vol 35 (1) ◽  
pp. 15-21 ◽  
Author(s):  
C Lethias ◽  
D J Hartmann ◽  
M Masmejean ◽  
M Ravazzola ◽  
I Sabbagh ◽  
...  
Keyword(s):  
Blood Vessels ◽  
Protein A ◽  
High Sensitivity ◽  
Ultrastructural Level ◽  
Rat Aorta ◽  
Elastic Fibers ◽  
Thin Sections ◽  
Rat Blood ◽  
Human Dermis ◽  
Arteries And Veins

Identification of elastic fibers at the ultrastructural level is accomplished by a post-embedding immunohistochemical technique using the protein A-colloidal gold method. Antisera against elastins from human dermis and rat aorta have been characterized by radioimmunoassay and then applied to thin sections of rat blood vessels. Two fixative solutions and two embedding media have been tested. Both antibodies bind to elastic fibers of normal arteries and veins, indicating crossreactions among organs and species. The high sensitivity of this method is demonstrated by its application to the detection of neo-elastogenesis in the intimal thickening of aortic grafts.

Relations between Activation and Inhibition of Fibrinolysis in the Walls of Human Arteries and Veins

1977 ◽  
Vol 38 (02) ◽  
pp. 0407-0419 ◽  
Author(s):  
Vincent Noordhoek Hegt
Keyword(s):  
Smooth Muscle ◽  
Smooth Muscle Cells ◽  
Blood Vessels ◽  
Muscle Cells ◽  
Hyaline Membrane Disease ◽  
Endotoxin Shock ◽  
Sandwich Technique ◽  
Human Arteries ◽  
Arteries And Veins ◽  
Insight Into

SummaryFrom systematic studies of both the activation and the inhibition of fibrinolysis in human blood vessels, data which provided insight into the fibrinolysis antagonism along and across the human vessel wall were obtained.The capacity for fibrinolysis initiated by plasminogen activator in sections of human arteries and veins as demonstrated by the fibrin sfide technique differed greatly along and across the vessel walls. Inhibition of plasmin fibrinolysis in these blood vessels as detected by the fibrin slide sandwich technique was present at sites of low fibrinolytic activity, while inhibition was absent in areas showing strong fibrinolysis. Fibrinolysis was related to endothelial cells, while inhibition of fibrinolysis was brought about by smooth muscle cells. The results indicate that differences in endothelial fibrinolysis may be the result of differences in inhibition of fibrinolysis caused by variations in the number of smooth muscle cells present locally. A systemic decrease in endothelial fibrinolysis observed in endotoxin shock, hyaline membrane disease and a Waterhouse-Friderichsen syndrome appeared to be associated with a systemic increase in inhibition of fibrinolysis not related to smooth muscle cells.

Effect of all-trans retinoic acid and pentagalloyl glucose on smooth muscle cell elastogenesis

2021 ◽  
pp. 1-13
Author(s):  
Kaveh Sanaei ◽  
Sydney Plotner ◽  
Anson Oommen Jacob ◽  
Jaime Ramirez-Vick ◽  
Narendra Vyavahare ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Retinoic Acid ◽  
Smooth Muscle Cells ◽  
Blood Vessels ◽  
Muscle Cells ◽  
Trans Retinoic Acid ◽  
All Trans Retinoic Acid ◽  
Tissue Engineered Blood Vessels ◽  
Pentagalloyl Glucose ◽  
Vitamin A Derivative

BACKGROUND: The main objective of tissue engineering is to fabricate a tissue construct that mimics native tissue both biologically and mechanically. A recurring problem for tissue-engineered blood vessels (TEBV) is deficient elastogenesis from seeded smooth muscle cells. Elastin is an integral mechanical component in blood vessels, allowing elastic deformation and retraction in response to the shear and pulsatile forces of the cardiac system. OBJECTIVE: The goal of this research is to assess the effect of the vitamin A derivative all-trans retinoic acid (RA) and polyphenol pentagalloyl glucose (PGG) on the expression of elastin in human aortic smooth muscle cells (hASMC). METHODS: A polycaprolactone (PCL) and the gelatin polymer composite was electrospun and doped with RA and PGG. The scaffolds were subsequently seeded with hASMCs and incubated for five weeks. The resulting tissue-engineered constructs were evaluated using qPCR and Fastin assay for their elastin expression and deposition. RESULTS: All treatments showed an increased elastin expression compared to the control, with PGG treatments showing a significant increase in gene expression and elastin deposition.

Penile Lichen Sclerosus and “Nevus Elasticus”

2021 ◽  
pp. 1-3
Author(s):  
Maiara Ferreira de Souza ◽  
Wendel Souza Kruschewsky ◽  
Nathanael de Freitas Pinheiro Junior ◽  
Daniel Abensur Athanazio
Keyword(s):  
Blood Vessels ◽  
Cutaneous Lesion ◽  
Lichen Sclerosus ◽  
Elastic Fibers ◽  
Deep Dermis

The association between penile lichen sclerosus and striking accumulation of elastic fibers in deep dermis has been described in rare reports, mostly in vulvar lesions. We describe one case of severe balanopreputial adhesions related to lichen sclerosus and this form of elastosis, with no concomitant neoplasia. Aggregates of elastic fibers were seen in deep dermis and in blood vessels. The lesion mirrors nevus elasticus and nevus elasticus vascularis – a well described cutaneous lesion with no known association with lichen sclerosus.

Abstract 286: Loss of Smad3 Exacerbates Abdominal Aortic Aneurysm Formation With Enhanced Inflammation in an Experimental Mouse Model

2013 ◽  
Vol 33 (suppl_1) ◽  
Author(s):  
Xiaohua Dai ◽  
Anandita Arora ◽  
Jianbin Shen ◽  
Hong Jiang ◽  
Li Li
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Aortic Aneurysm ◽  
Calcium Chloride ◽  
The United States ◽  
Protective Role ◽  
Elastic Fibers ◽  
Aneurysm Formation ◽  
Abdominal Aortic ◽  
The Media ◽  
Chloride Treatment

Introduction Abdominal aortic aneurysm (AAA) is a complex vascular disease that causes more than 10,000 deaths each year in the United States. Extensive studies have been performed in search of pharmaceutical treatment but surgical repair still remains the most effective treatment. TGF-β signaling is an important mechanism in the pathogenesis of aneurysms; however, there is debate as to whether its role is protective or destructive. Smad3 is a major intracellular mediator of the canonical pathway of TGF-β signaling. Hypothesis We hypothesize that Smad3-mediated TGF-β signal pathway plays important roles in the pathogenesis of AAA. Methods To test this hypothesis, we analyze the effects of loss of Smad3 on aneurysm formation in the calcium chloride induced AAA model using Smad3 knockout mice. Results Three weeks after calcium chloride treatment, the abdominal aorta displayed increased dilation, forming aneurysms. Histology and immunohistochemistry analyses show increased cell proliferation and enhanced inflammatory cell infiltration in the media and adventitia of the vessel wall. This was accompanied by elastic fibers degradation, increased MMPs expression and reduced expression of smooth muscle markers. Further analysis showed that the expression and nuclear localization of Smad2 and Smad4 was significantly increased. Conclusions These results demonstrate that Smad3-mediated TGF-β signaling plays a protective role in the pathogenesis of AAA and Smad2/Smad4 upregulation is not sufficient to compensate for the loss of Smad3 in this experimental model.

Adhesive strength of single muscle cells to basement membrane at myotendinous junctions

1989 ◽  
Vol 67 (3) ◽  
pp. 1063-1069 ◽  
Author(s):  
J. G. Tidball ◽  
M. Chan
Keyword(s):  
Basement Membrane ◽  
Muscle Cells ◽  
Isometric Tension ◽  
Breaking Stress ◽  
Myotendinous Junction ◽  
Compression Injury ◽  
Cross Sectional ◽  
Biologically Relevant ◽  
Strain And Strain Rate ◽  
Myotendinous Junctions

Whole muscles loaded to failure frequently fail at or near myotendinous junctions. The present investigation was directed toward determining the breaking stress and failure site of intact and injured myotendinous junction preparations consisting of muscle cells dissected free from surrounding parallel structures but still attached to tendon collagen fibers. These tests show that the breaking stress for intact myotendinous units is 2.7 x 10(5) N/m2, expressed relative to cell cross-sectional area. Failure occurs immediately external to the junction membrane between the cell membrane and lamina densa of the basement membrane. Site and stress at failure are independent of strain and strain rate over a biologically relevant range. Breaking stress in the plane of the membrane, corrected for membrane folding, is 1.2 X 10(4) N/m2. This value is not significantly greater than stress at maximum isometric tension for these cells at these sarcomere lengths. After compression injury, cells fail within the compression site at significantly lower stress (1.9 X 10(5) N/m2). These findings suggest that, in muscle strain injuries that occur under conditions simulated here, failure occurs at myotendinous junctions unless the muscle has suffered previous compression injury leading to failure within the muscle.

scholarly journals Histochemical and immunohistochemical analysis of ruptured atherosclerotic abdominal aortic aneurysm wall

2010 ◽  
Vol 67 (12) ◽  
pp. 959-964 ◽  
Author(s):  
Irena Tanaskovic ◽  
Aleksandra Mladenovic-Mihailovic ◽  
Slavica Usaj-Knezevic ◽  
Vesna Stankovic ◽  
Aleksandar Aleksic ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Abdominal Aortic Aneurysm ◽  
Aortic Aneurysm ◽  
Smooth Muscle Cells ◽  
Periodic Acid ◽  
Muscle Cells ◽  
Foam Cells ◽  
Abdominal Aortic ◽  
S 100 ◽  
The Media

Background/Aim. The main complication of the atherosclerotic abdominal aortic aneurism (AAA) is her rupture that begins with lesion in intima and rupture. The purpose of this work was to determine immunocytochemical and morphofunctional characteristics of the cells in aortic wall in ruptured atherosclerotic abdominal aortic aneurysm. Method. During the course of this study, 20 samples of atherosclerotic AAA were analyzed, all of them obtained during authopsy. The samples were fixed in 4% formalin and embedded in paraffin. Sections of 5 ?m thickness were stained histochemically (of Heidenhain azan stain and Periodic acid Schiff - PAS stain) and immunocytochemically using a DAKO LSAB+/HRP technique to identify ?-smooth muscle actin (?-SMA), vimentin, myosin heavy chains (MHC), desmin, S-100 protein, CD45 and CD68 (DAKO specification). Results. The results of our study showed that ruptured atherosclerotic AAA is characterized by a complete absence of endothelial cells, the disruption of basal membrane and internal elastic lamina, as well as a presence of the remains of hypocellular complicated atherosclerotic lesion in intima. On the plaque margins, as well as in the media, smooth muscle cells (SMCs) are present, which express a ?-SMA and vimentin (but without MHC or desmin expression), as well as leukocyte infiltration, and a large number of foam cells. Some of the foam cells show a CD68-immunoreactivity, while the others show vimentin- and S-100 protein-immunoreactivity. Media is thinned out with a disorganized elastic lamellas, while adventitia is characterized by inflammatory inflitrate (infection). Conclusion. Rupture of aneurysm occurs from the primary intimal disruption, which spreads into thinned out media and adventitia. Rupture is caused by unstable atherom, hypocellularity, loss of contractile characteristics of smooth muscle cells in intima and media, neovascularization of the media, as well as by the activity of the macrophages in the lesion.

scholarly journals Мікроскопічні зміни в нирках і міокарді курей за інфекційного ларинготрахеїту

2013 ◽  
pp. 54-55
Author(s):  
Б. В. Борисевич ◽  
В. В. Лісова ◽  
М. С. Криштоп
Keyword(s):  
Blood Vessels ◽  
Muscle Fibers ◽  
Muscle Cells ◽  
Degenerative Changes ◽  
Histological Studies ◽  
Infectious Laryngotracheitis ◽  
Circulatory Disorders

Представлено результати гістологічних дослі-джень нирок і міокарду курей, які загинули від інфек-ційного ларинготрахеїту. Встановлено, що в нирках реєструються розлади кровообігу в вигляді розши-рення та переповнення кров’ю кровоносних судин строми органа, екстракапілярний серозний гломеру-лонефрит і дистрофічні зміни та руйнування епіте-лію канальців. У міокарді провідною патологією була зерниста дистрофія м’язових клітин. Окрім того реєструвалися фрагментація та дезорієнтація м’язових волокон. У епікарді та ендокарді мікроско-пічних змін не було. The results of histological studies of kidneys and myocardium of chickens that died of infectious laryngotracheitis have been shown. It was found that circulatory disorders in the form of expansion and overflow of blood with blood vessels of body stroma, extra serosal capillary glomerulonephritis and degenerative changes and destruction of epithelial tubules are registered in the kidneys. In the myocardium the leading pathology was granular dystrophy of muscle cells. In addition, fragmentation and disorientation of muscle fibers was registered. In the epicardium and endocardium there were no microscopic changes.

scholarly journals Extrarenal angiomyolipoma in uterine cervix: rare presentation in unusual site

2019 ◽  
Vol 8 (1) ◽  
pp. 367
Author(s):  
Rashmi Monteiro ◽  
Shikha Sharma ◽  
Sonal Gupta ◽  
Indu Choudhary
Keyword(s):  
Smooth Muscle ◽  
Smooth Muscle Cells ◽  
Blood Vessels ◽  
Uterine Cervix ◽  
Abdominal Mass ◽  
Muscle Cells ◽  
Renal Angiomyolipoma ◽  
Rare Presentation ◽  
Unusual Site ◽  
Hmb 45

Angiomyolipoma is a benign neoplasm composed of variable admixture of blood vessels, smooth muscle cells and adipose tissue. Cervical angiomyolipoma are extremely rare and to the best of our knowledge only five cases of angiomyolipoma in cervix have been reported in the literature till date. Authors are presenting a case of angiomyolipoma arising from the uterine cervix. 43 years old female presented with mass descending per vagina for 6 months. This case had no association with tuberous sclerosis. Microscopic examination showed an ill-defined polypoidal, non-encapsulated lesion covered by keratinized stratified epithelium. The lesion is made up of three components, predominantly by fascicles of spindle shaped cells, varying sized blood vessels and multiple foci of mature adipocytes with no evidence of atypia or increased mitotic activity. Smooth muscle component showed strong immunoreactivity to SMA and absence of elastic fibres in the blood vessels were confirmed by histochemistry. Non-vascular smooth muscle cells were negative for HMB-45 in contrast to renal and other extra-renal angiomyolipoma in which HMB-45 immunoreactivity in seen in these cells. To conclude, the differential diagnosis of lower abdominal mass and dysfunctional uterine bleeding should include the angiomyolipoma, even though the uterine cervix is an extremely rare location where they occur.

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