The Persistence of Left posterior Cardinal Vein and the Presence of an Abnormal Vein opening into the Isthmus of the Liver in an Iatlian Toad

2010 ◽  
Vol 99 (2) ◽  
pp. 177-180
Author(s):  
JNANENDRA LAL BHADURI
Keyword(s):  
Cardinal Vein ◽  
Left Posterior ◽  
Posterior Cardinal Vein

scholarly journals Prominent Accessory Hemiazygos Vein representing Persistence of Cranial Portion of Posterior Cardinal Vein: Embryological Variant

2017 ◽  
Vol 1 (1) ◽  
pp. 40-41
Keyword(s):  
Azygos Vein ◽  
Brachiocephalic Vein ◽  
Cardinal Vein ◽  
Medical College ◽  
Hemiazygos Vein ◽  
Left Posterior ◽  
Male Cadaver ◽  
The Right ◽  
Small Parts ◽  
Posterior Cardinal Vein

ABSTRACT Introduction The azygos venous system has developed from the postcardinal veins of the embryo, and small parts persist only at the commencement of the azygos vein. Complex embryological development of these veins is a major cause for many possible variations of the azygos system. Materials and methods The present study was done in the Department of Anatomy, Government Medical College, Amritsar, on a male cadaver aged about 50 years. The thoracic cavity was opened to dissect the azygos system of veins. Results The system showed the persistent cranial part of the posterior cardinal vein. This led to the formation of a well-developed venous channel on the left side of the aortic arch and the thoracic aorta. This channel drained the 2nd to 10th left posterior intercostal veins and drained itself into the left brachiocephalic vein (LBV) after crossing the arch of aorta vertically on its right. There was no transvertebral communication between this channel and azygos vein on the right side. The hemiazygos vein (HAV) on the left side was normally formed and immediately drained into the azygos vein by turning to the left. The azygos vein on the right side was also normal. Conclusion The presence of such persistent embryological remnant, its position, and approximation to the structures near the arch of aorta should be taken into account to avoid radiological misdiagnosis and surgical complications. How to cite this article Sehmi S. Prominent Accessory Hemiazygos Vein representing Persistence of Cranial Portion of Posterior Cardinal Vein: Embryological Variant. Curr Trends Diagn Treat 2017;1(1):40-41.

scholarly journals Cyclical Changes in Interrenal and Chromaffin Cells in Relation to Testicular Activity of Olive Barb, Puntius Sarana (Hamilton)

2014 ◽  
Vol 22 (2) ◽  
pp. 151-158 ◽  
Author(s):  
Padmanabha Chakrabarti ◽  
Saroj Kumar Ghosh
Keyword(s):  
Chromaffin Cells ◽  
Head Kidney ◽  
Staining Intensity ◽  
Annual Reproductive Cycle ◽  
Cardinal Vein ◽  
Distinctive Features ◽  
Testicular Cells ◽  
Post Spawning ◽  
Puntius Sarana ◽  
Posterior Cardinal Vein

Abstract The present study focused on observations of the histological status of adrenocortical tissues and the correlated seasonal changes in testicular activities in Puntius sarana (Hamilton). Interrenal and chromaffin cells were located in the head kidney between the posterior cardinal vein and hemopoietic tissues. Various male germ cells were identified in the testis based on distinctive features, distribution, and staining properties. The cytoplasmic features and the architecture of the interrenal and chromaffin cells varied during different phases of the annual reproductive cycle. The cytoplasm mass was elevated throughout maturation and spawning phases; however, it was weak in the post-spawning and growth phases. The staining intensity changed in the cells showing various phases of secretory efficiency harmonized with the constitution of different testicular cells.

scholarly journals A case of tuberculosis of the rare azygos lobe of the right lung

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Sandeep Singh Awal ◽  
Som Subhro Biswas ◽  
Hitesh Goyal ◽  
Sampreet Kaur Awal
Keyword(s):  
Incidental Finding ◽  
Chest Imaging ◽  
Cardinal Vein ◽  
Anatomical Variant ◽  
Case Presentation ◽  
Azygos Lobe ◽  
Rare Case Report ◽  
History Of ◽  
The Right ◽  
Posterior Cardinal Vein

Abstract Background The azygos lobe is a rare anatomical variant seen in the upper lobe of right lung. It occurs during embryological development due to the failure of posterior cardinal vein to migrate supero-medially. It is often an incidental finding on imaging and is asymptomatic in majority of cases. Tuberculosis involving the azygos lobe is extremely rare. Only a few cases of tuberculosis involving the azygos lobe have been reported in literature. Case presentation We present a rare case report of tuberculosis infection involving the azygos lobe in a 57-year-old male with history of chronic cough, fever, hemoptysis, and weight loss. Conclusions The azygos lobe is usually asymptomatic, but it may be misdiagnosed as bulla, lung cyst, or abscess. In rare cases it may be associated with certain pathology such as tuberculosis, other infections, and lung cancer. Hence, it is pertinent for a radiologist to be aware of this variant when reporting chest imaging cases.

scholarly journals Vasohibin 1 selectively regulates secondary sprouting and lymphangiogenesis in the zebrafish trunk

Development ◽  
2021 ◽  
Vol 148 (4) ◽  
pp. dev194993
Author(s):  
Marta Bastos de Oliveira ◽  
Katja Meier ◽  
Simone Jung ◽  
Eireen Bartels-Klein ◽  
Baptiste Coxam ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Lymphatic Vessel ◽  
Zebrafish Embryo ◽  
Cell Number ◽  
Post Translational Modification ◽  
Cardinal Vein ◽  
Cell Functions ◽  
Cell Divisions ◽  
Posterior Cardinal Vein

ABSTRACTPrevious studies have shown that Vasohibin 1 (Vash1) is stimulated by VEGFs in endothelial cells and that its overexpression interferes with angiogenesis in vivo. Recently, Vash1 was found to mediate tubulin detyrosination, a post-translational modification that is implicated in many cell functions, such as cell division. Here, we used the zebrafish embryo to investigate the cellular and subcellular mechanisms of Vash1 on endothelial microtubules during formation of the trunk vasculature. We show that microtubules within venous-derived secondary sprouts are strongly and selectively detyrosinated in comparison with other endothelial cells, and that this difference is lost upon vash1 knockdown. Vash1 depletion in zebrafish specifically affected secondary sprouting from the posterior cardinal vein, increasing endothelial cell divisions and cell number in the sprouts. We show that altering secondary sprout numbers and structure upon Vash1 depletion leads to defective lymphatic vessel formation and ectopic lymphatic progenitor specification in the zebrafish trunk.

Desensitisation of chromaffin cell nicotinic receptors does not impede catecholamine secretion during acute hypoxia in rainbow trout (Oncorhynchus mykiss)

2000 ◽  
Vol 203 (10) ◽  
pp. 1589-1597 ◽  
Author(s):  
K.N. Lapner ◽  
C.J. Montpetit ◽  
S.F. Perry
Keyword(s):  
Nicotinic Receptor ◽  
Nicotinic Receptors ◽  
Acute Hypoxia ◽  
Plasma Catecholamine ◽  
Cardinal Vein ◽  
Plasma Adrenaline ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Posterior Cardinal Vein ◽  
Receptor Desensitisation

Experiments were performed on adult rainbow trout (Oncorhynchus mykiss) in vivo using chronically cannulated fish and in situ using a perfused posterior cardinal vein preparation (i) to characterise the desensitisation of chromaffin cell nicotinic receptors and (ii) to assess the ability of fish to secrete catecholamines during acute hypoxia with or without functional nicotinic receptors. Intra-arterial injection of nicotine (6.0×10(−)(7)mol kg(−)(1)) caused a rapid increase in plasma adrenaline and noradrenaline levels; the magnitude of this response was unaffected by an injection of nicotine given 60 min earlier. Evidence for nicotinic receptor desensitisation, however, was provided during continuous intravenous infusion of nicotine (1.3×10(−)(5)mol kg(−)(1)h(−)(1)) in which plasma catecholamine levels increased initially but then returned to baseline levels. To ensure that the decline in circulating catecholamine concentrations during continuous nicotine infusion was not related to changes in storage levels or altered rates of degradation/clearance, in situ posterior cardinal vein preparations were derived from fish previously experiencing 60 min of saline or nicotine infusion. Confirmation of nicotinic receptor desensitisation was provided by demonstrating that the preparations derived from nicotine-infused fish were unresponsive to nicotine (10(−)(5)mol l(−)(1)), yet remained responsive to angiotensin II (500 pmol kg(−)(1)). The in situ experiments demonstrated that desensitisation of the nicotinic receptor occurred within 5 min of receptor stimulation and that resensitisation was established 40 min later. The ability to elevate plasma catecholamine levels during acute hypoxia (40–45 mmHg; 5.3-6.0 kPa) was not impaired in fish experiencing nicotinic receptor desensitisation. Indeed, peak plasma adrenaline levels were significantly higher in the desensitised fish during hypoxia than in controls (263+/−86 versus 69+/−26 nmol l(−)(1); means +/− s.e.m., N=6-9). Thus, the results of the present study demonstrate that activation of preganglionic sympathetic cholinergic nerve fibres and the resultant stimulation of nicotinic receptors is not the sole mechanism for eliciting catecholamine secretion during hypoxia.

scholarly journals Vasoactive intestinal polypeptide- and pituitary adenylate cyclase activating polypeptide-mediated control of catecholamine release from chromaffin tissue in the rainbow trout, Oncorhynchus mykiss

2000 ◽  
Vol 166 (3) ◽  
pp. 705-714 ◽  
Author(s):  
CJ Montpetit ◽  
SF Perry
Keyword(s):  
Rainbow Trout ◽  
Chromaffin Cells ◽  
Catecholamine Secretion ◽  
Cardinal Vein ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Neuronal Control ◽  
Pituitary Adenylate Cyclase ◽  
Posterior Cardinal Vein ◽  
Chromaffin Tissue

The aim of the present investigation was to assess the relative contributions of cholinergic (acetylcholine) and non-cholinergic vasoactive intestinal polypeptide (VIP), and pituitary adenylate cyclase activating polypeptide (PACAP) neurotransmitters in the neuronal control of catecholamine secretion from the chromaffin tissue lining the posterior cardinal vein of the rainbow trout (Oncorhynchus mykiss). Using an in situ saline-perfused posterior cardinal vein preparation, it was demonstrated that exogenous administration of chicken VIP or human PACAP-27 caused a dose-dependent increase in adrenaline secretion; noradrenaline secretion was unaffected. Analysis of dose-response curves indicated that VIP and PACAP stimulated the secretion of adrenaline with a similar degree of potency (ED(50) for VIP=1.90x10(-11) mol/kg; ED(50) for PACAP=1.03x10(-11) mol/kg). The VIP/PACAP-elicited secretion was diminished in the presence of the VIP receptor antagonist, VIP 6-28, but was unaffected by the PACAP receptor antagonist, PACAP 6-27, or the cholinergic antagonists, hexamethonium and atropine. Thus, this is the first study to demonstrate a direct stimulatory role for VIP or PACAP in catecholamine secretion from piscine chromaffin cells. The relative contribution of cholinergic and non-cholinergic neurotransmitters in the neuronal control of catecholamine secretion from the chromaffin tissue was evaluated using an in situ nerve-stimulating technique previously validated by us in the rainbow trout. This was accomplished by comparing catecholamine secretion in the presence or absence of cholinergic and the VIP and PACAP receptor antagonists during different levels of electrical stimulation. The results demonstrated that cholinergic stimulation predominated during high frequency of electrical stimulation (20 Hz) while the non-cholinergic component prevailed at low frequency (1 Hz). Overall, the results of the present investigation demonstrate that VIP and/or PACAP may directly stimulate adrenaline secretion from trout chromaffin cells at low levels of neuronal activity. Therefore, the neuronal control of catecholamine secretion in teleosts may not be confined to cholinergic-evoked events.

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