scholarly journals Adenosinergic System in the Mesenteric Vessels

10.5772/38534 ◽  
2012 ◽  
Author(s):  
Ana Leito-Rocha ◽  
Joana Beatriz ◽  
Carmen Diniz
Keyword(s):  
Mesenteric Vessels

The Ullrastructure of Platelet Participation in Hemostasis

1965 ◽  
Vol 13 (01) ◽  
pp. 065-083 ◽  
Author(s):  
Shirley A. Johnson ◽  
Ronaldo S. Balboa ◽  
Harlan J. Pederson ◽  
Monica Buckley
Keyword(s):  
Platelet Aggregation ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Guinea Pigs ◽  
Platelet Factor ◽  
Mesenteric Vessels ◽  
Platelet Aggregates ◽  
Electron Lucent

SummaryThe ultrastructure of platelet aggregation in vivo in response to bleeding brought about by transection of small mesenteric vessels in rats and guinea pigs has been studied. Platelets aggregate, degranulate and separating membranes disappear in parallel with fibrin appearance which is first seen at several loci after 30 seconds of bleeding. About 40 per cent of the electron opaque granules, some of which contain platelet factor 3 have disappeared after one minute of bleeding while the electron lucent granules increase by 70 per cent suggesting that some of them may be empty vesicles. Most of the platelet aggregates of the random type disappear leaving clumped red blood cells entrapped by a network of fibrin fibers which emanate from the remains of platelet aggregates of the rosette type to maintain hemostasis.

THE DIAGNOSIS OF ATEROSCLEROSIS OF MESENTERIC VESSELS CLINICALLY OCCURS UNDER THE GUISE OF GASTROPATHY

2016 ◽  
Vol 26 (4) ◽  
pp. 505-521
Author(s):  
Lyudmila N. Goncharova ◽  
◽  
Valentina N. Antipova ◽  
Natalya P. Sergutova ◽  
Dmitriy A. Anisimov ◽  
...  
Keyword(s):  
Mesenteric Vessels

scholarly journals A pilot study investigating the use of 4D flow MRI for the assessment of splanchnic flow in patients suspected of mesenteric ischaemia

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pauline Hall Barrientos ◽  
Katrina Knight ◽  
Douglas Black ◽  
Alexander Vesey ◽  
Giles Roditi
Keyword(s):  
Blood Flow ◽  
Pilot Study ◽  
Splenic Vein ◽  
Normal Subjects ◽  
Mesenteric Ischaemia ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri ◽  
Mesenteric Vessels ◽  
Flow Changes

AbstractThe most common cause of chronic mesenteric ischaemia is atherosclerosis which results in limitation of blood flow to the gastrointestinal tract. This pilot study aimed to evaluate 4D flow MRI as a potential tool for the analysis of blood flow changes post-prandial within the mesenteric vessels. The mesenteric vessels of twelve people were scanned; patients and healthy volunteers. A baseline MRI scan was performed after 6 h of fasting followed by a post-meal scan. Two 4D flow datasets were acquired, over the superior mesenteric artery (SMA) and the main portal venous vessels. Standard 2D time-resolved PC-MRI slices were also obtained across the aorta above the coeliac trunk, superior mesenteric vein, splenic vein and portal vein (PV). In the volunteer cohort there was a marked increase in blood flow post-meal within the PV (p = 0.028), not seen in the patient cohort (p = 0.116). Similarly, there were significant flow changes within the SMA of volunteers (p = 0.028) but not for the patient group (p = 0.116). Our pilot data has shown that there is a significant haemodynamic response to meal challenge in the PV and SMA in normal subjects compared to clinically apparent CMI patients. Therefore, the interrogation of mesenteric venous vessels exclusively is a feasible method to measure post-prandial flow changes in CMI patients.

scholarly journals Pregnancy Enhances the Angiotensin (Ang)-(1–7) Vasodilator Response in Mesenteric Arteries and Increases the Renal Concentration and Urinary Excretion of Ang-(1–7)

Endocrinology ◽  
2003 ◽  
Vol 144 (8) ◽  
pp. 3338-3343 ◽  
Author(s):  
Liomar A. A. Neves ◽  
Aleck F. Williams ◽  
David B. Averill ◽  
Carlos M. Ferrario ◽  
Michael P. Walkup ◽  
...  
Keyword(s):  
Urinary Excretion ◽  
Excretion Rate ◽  
Virgin Female ◽  
Cardiovascular Regulation ◽  
Mesenteric Arteries ◽  
Female Rats ◽  
Resistance Arteries ◽  
Urinary Excretion Rate ◽  
Response Curves ◽  
Mesenteric Vessels

Abstract The vasoactive effect of angiotensin (Ang)-(1–7) in mesenteric resistance arteries together with its plasma and kidney concentration and urinary excretion was assessed in pregnant and virgin rats. Mesenteric arteries (230–290 μm) were mounted in a pressurized myograph system and Ang-(1–7) concentration-dependent response curves (10−10–10−5m) were determined in arteries preconstricted with endothelin-1 (10−7m). The Ang-(1–7) response was investigated in vessels with and without pretreatment with the Ang-(1–7) antagonist [d-[Ala7]-Ang-(1–7)] (10−7m). Ang-(1–7) caused a significantly enhanced, concentration-dependent dilation of mesenteric vessels (EC50 = 2.7 nm) from pregnant compared with virgin female rats. d-[Ala7]-Ang-(1–7) eliminated the vasodilator effect of Ang-(1–7). There was no significant change in plasma concentration of Ang-(1–7) in pregnant animals. On the other hand, 24 h urinary excretion and kidney concentration of Ang-(1–7) were significantly higher in pregnant animals. The increased mesenteric dilation to Ang-(1–7) with enhanced kidney concentration and 24 h urinary excretion rate of Ang-(1–7) suggests an important role for this peptide in cardiovascular regulation during pregnancy.

scholarly journals Leiomyosarcoma of the Mesenteric Root: A Strategic Location of a Rare Tumor

2015 ◽  
Vol 8 (2) ◽  
pp. 359-362
Author(s):  
Yoram Kluger ◽  
Offir Ben-Ishay
Keyword(s):  
Blood Vessels ◽  
Clinical Judgment ◽  
Treatment Modality ◽  
Rare Tumor ◽  
Mesenteric Root ◽  
Strategic Location ◽  
Mesenteric Vessels

High mesenteric root sarcomas are difficult to manage due to their proximity to the superior mesenteric vessels. Resection of these tumors along with the blood vessels may lead to a complicated and protracted convalescence for the patient. Resection remains the main treatment modality for these tumors. During operation on high mesenteric root sarcomas, sound clinical judgment is needed for the decision not to sacrifice vital blood vessels.

scholarly journals Exclusive Phlebosclerosis of Submucosal Veins Leading to Ischemic Necrosis and Perforation of the Large Bowel: First European Case

2018 ◽  
Vol 12 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Sebastian Klein ◽  
Denise Buchner ◽  
De-hua Chang ◽  
Reinhard Büttner ◽  
Uta Drebber ◽  
...  
Keyword(s):  
Wall Thickening ◽  
Caucasian Woman ◽  
Ischemic Necrosis ◽  
Colonic Wall ◽  
Asian Patients ◽  
Life Threatening ◽  
History Of ◽  
Mesenteric Vessels ◽  
The Right ◽  
European Woman

Phlebosclerotic colitis (PC) is a rare, potentially life-threatening disease of unclear pathogenesis almost exclusively reported in Asian patients of both genders. A fibrous degeneration of venous walls leads to threadlike calcifications along mesenteric vessels and colonic wall thickening, detectable by CT. This causes disturbed blood drainage and hemorrhagic infarction of the right-sided colonic wall. This is a report of PC in a Caucasian woman in Europe without Asian background and no history of herbal medications, a suspected cause in Asian patients. CT revealed no calcification of the mesenteric vein or its tributaries. Instead, submucosal veins of the left-sided colonic wall were calcified, leading to subsequent transmural necrosis. Clinically, the patient developed a paralytic ileus and sigmoidal perforation during a 2-week hospitalization due to a bleeding cerebral vascular aneurysm. This case of a European woman with PC is unique in its course as well as its radiologic, clinical, and pathologic presentation.

Abstract 244: Increased Expression and Enhanced Vasorelaxation Activity of Specific Estrogen Receptor Subtypes in the Aorta and Mesenteric Vessels during Pregnancy

Hypertension ◽  
2014 ◽  
Vol 64 (suppl_1) ◽  
Author(s):  
Karina M Mata ◽  
Wei Li ◽  
Ossama M Reslan ◽  
Waleed T Siddiqui ◽  
Lauren A Opsasnick ◽  
...  
Keyword(s):  
Renal Artery ◽  
Mesenteric Artery ◽  
Receptor Subtypes ◽  
Vascular Effects ◽  
Western Blots ◽  
Expression Activity ◽  
Mesenteric Vessels ◽  
Nos Inhibitor ◽  
Dependent Mechanism

Pregnancy (Preg) is associated with hormonal and vascular changes, and estrogen (E2) may promote systemic vasodilation during Preg; however, the specific E2 receptor (ER), post-ER signaling mechanisms and vascular bed involved are unclear. To test if Preg is associated with distinct expression/activity of ERs in different blood vessels, BP and plasma E2 were measured in virgin and day-19 Preg rats, and the aorta, carotid, mesenteric and renal artery were isolated for measurement of ERα, ERβ and GPR30 expression, and the responses to E2 and specific ER agonists PPT (ERα), DPN (ERβ) and G1 (GPR30). BP was in Preg (89±6) < virgin (98±4mmHg), and plasma E2 was in Preg (120.5±5.8) > virgin (94.3±7.5pg/ml). Western blots revealed increased ERα and ERβ in aorta and mesenteric artery and GPR30 in aorta of Preg vs virgin. Immunohistochemistry revealed that the increases in ERs were mainly in intima and media. E2 and PPT caused greater relaxation of aorta of Preg (52.8±5.5, 49.3±11.4) than virgin (30.0±3.9, 19.3±3.8%) and of mesenteric artery of Preg (77.9±4.7, 75.4±4.5) than virgin (57.4±5.9, 46.5±9.5%), but similar relaxation in carotid and renal artery of Preg vs virgin. DPN and G1 caused greater relaxation in mesenteric and renal artery (15 to 30%) than aorta and carotid artery (<10%), but only aortic relaxation to G1 was in Preg (26.2±4.4) > virgin (5.3±6.7%). The NOS inhibitor L-NAME ± EDHF blocker tetraethylammonium or endothelium removal reduced PPT relaxation in aorta, suggesting an endothelium-dependent mechanism, but did not affect E2, PPT, DPN or G1-induced relaxation in other vessels, suggesting endothelium-independent mechanisms. PPT caused relaxation of Ca 2+ entry-dependent KCl contraction of mesenteric artery that was in Preg (69.7±5.5) > virgin rats (52.9±8.11%). Thus, during pregnancy, an increased ERα expression in endothelial and smooth muscle layers of aorta and mesenteric artery is associated with increased ERα-mediated relaxation via endothelium-derived vasodilators and direct inhibition of Ca 2+ entry pathways, supporting a role of aortic and mesenteric arterial ERα in pregnancy-associated systemic vasodilation. GPR30 may contribute to aortic dilation while the enhanced ERβ may mediate other genomic vascular effects during pregnancy.

scholarly journals Mapping of the superior mesenteric vessels for artery first pancreatoduodencectomy in patients with high visceral fat

HPB ◽  
2019 ◽  
Vol 21 ◽  
pp. S713
Author(s):  
A. Aldouri ◽  
K. Wang ◽  
V. Upasani ◽  
H. Yamaue
Keyword(s):  
Visceral Fat ◽  
Artery First ◽  
Mesenteric Vessels

2. The reading of Dr Knox's paper on the Natural History of the Salmon, was concluded

1845 ◽  
Vol 1 ◽  
pp. 7-10
Keyword(s):  
Natural History ◽  
Rapid Growth ◽  
Outer Shell ◽  
Careful Examination ◽  
Umbilical Vessels ◽  
History Of ◽  
Mesenteric Vessels

The object of the author was a careful examination of facts in the Natural History of the Salmon, which hitherto have been taken merely upon opinion. He watched and carefully observed personally the deposition of the ova or eggs of the salmon under the gravel,—its long confinement in that situation,—its growth into a fish about an inch in length,—its ascent through the gravel, and rapid growth whilst in the rivers: the journals of observation were partly read to the Society. Twenty weeks was the period from the time of deposition to their bursting the outer shell; for nine days longer they continued under the gravel as fishes, drawing their nourishment from the yoke of the egg, which is of course attached to them by the umbilical vessels or, more properly, by the ompholo-mesenteric vessels.

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