scholarly journals Nuevos casos de feocromocitoma en el hospital universitario de Neiva

2017 ◽  
Vol 2 (3) ◽  
pp. 63-70
Author(s):  
Alejandro Pinzón Tovar ◽  
Eduard Mauricio Díaz ◽  
Orfa Yaneth Motta ◽  
Marcela Castro
Keyword(s):  
Adrenal Medulla ◽  
Chromaffin Cells ◽  
Real Life ◽  
Case Series ◽  
Present Review ◽  
Current Management ◽  
The Poor ◽  
Uncommon Condition ◽  
Diagnostic Possibility ◽  
Para Determinar

El feocromocitoma es un tumor productor de catecolaminas con una prevalencia de 2 a 8 por millón de personas, que deriva en 85% de los casos de las células cromafines de la médula suprarrenal. La presente revisión, ilustrada con una serie de casos, brinda una actualización del tema que muestra situaciones de la vida real que ocurren en nuestra institución. Las dificultades para el estudio y diagnóstico, por la pobre disponibilidad de las pruebas para determinar el exceso de catecolaminas o sus metabolitos y lo infrecuente de la condición, pueden retardar la sospecha de esta patología como una posibilidad diagnóstica y diferir la interconsulta a endocrinología, necesaria para aportar en el tratamiento de los casos de feocromocitoma. Con este documento describimos lo que ocurre en nuestra población y realizamos una revisión práctica del estudio, diagnóstico y manejo actual de este tipo de tumores.Abstract Pheochromocytoma is a catecholamine producing tumor with a prevalence of 2 to 8 per million people, 85% arise from chromaffin cells of the adrenal medulla. The present review, illustrated with a case series, gives an update on the issue showing real life situations that occur in our institution. The difficulties in the study and diagnosis by the poor availability of tests for excess catecholamines or their metabolites and uncommon condition, can slow the suspicion of this disease as a diagnostic possibility and defer interconsultation to endocrinology, necessary for contribute to treat pheochromocytoma cases. In this paper we describe what happens in our community and realize a practical review in the study, diagnosis and current management of these tumors.

scholarly journals Effects of Adrenal Medulla and Sciatic Nerve Co-Grafts in Rats with Unilateral Substantia Nigra Lesions

1992 ◽  
Vol 3 (2-3) ◽  
pp. 159-167 ◽  
Author(s):  
William J. Freed ◽  
George Willingham ◽  
Robert Heim
Keyword(s):  
Animal Models ◽  
Sciatic Nerve ◽  
Substantia Nigra ◽  
Adrenal Medulla ◽  
Sural Nerve ◽  
Chromaffin Cells ◽  
Behavioral Effects ◽  
Rotational Behavior ◽  
The Poor ◽  
6 Hydroxydopamine

Major limitations of adrenal medulla transplantation in animal models of Parkinson's disease have been the relatively small behavioral effects and the poor or inconsistent graft survival. Transplantation of fragments of sural nerve in combination with adrenal medulla has been reported to increase the survival of chromaffin cells in adrenal medulla grafts in primates. In the present study, the possibility was tested that peripheral nerve co-grafts would increase the functional effects of adrenal medulla grafts in a 6-hydroxydopamine-lesioned rat model. Animals received unilateral substantia nigra lesions, and subsequently received intraventricular grafts of adrenal medulla, sciatic nerve, adrenal medulla plus sciatic nerve, or sham grafts consisting of medium only. Functional effects of the grafts were tested using apomorphine-induced rotational behavior. The sciatic nerve co-grafts did not increase the survival of TH-immunoreactive chromaffin cells. The co-grafting treatment also did not augment the overall effect of adrenal medulla grafts on rotational behavior. In the animals with substantial numbers of surviving chromaffin cells, however, the animals with sciatic nerve co-grafts showed greater decreases in rotational behavior as compared to the animals with adrenal medulla grafts alone, even though the number of surviving cells was not increased.

Immunogold labeling of the calcium binding protein synexin in isolated adrenal chromaffin granules and chromaffin cells

1990 ◽  
Vol 48 (3) ◽  
pp. 952-953
Author(s):  
Gemma A.J. Kuijpers ◽  
Harvey B. Pollard
Keyword(s):  
Adrenal Medulla ◽  
Calcium Binding ◽  
Chromaffin Cells ◽  
Cell Activation ◽  
Structural Information ◽  
Dependent Manner ◽  
Chromaffin Granules ◽  
Immuno Electron Microscopy ◽  
Ultrathin Sections ◽  
Adrenal Chromaffin

Exocytotic fusion of granules in the adrenal medulla chromaffin cell is triggered by a rise in the concentration of cytosolic Ca2+ upon cell activation. The protein synexin, annexin VII, was originally found in the adrenal medulla and has been shown to cause aggregation and to support fusion of chromaffin granules in a Ca2+-dependent manner. We have previously suggested that synexin may there fore play a role in the exocytotic fusion process. In order to obtain more structural information on synexin, we performed immuno-electron microscopy on frozen ultrathin sections of both isolated chromaffin granules and chromaffin cells.Chromaffin granules were isolated from bovine adrenal medulla, and synexin was isolated from bovine lung. Granules were incubated in the presence or absence of synexin (24 μg per mg granule protein) and Ca2+ (1 mM), which induces maximal granule aggregation, in 0.3M sucrose-40m MMES buffer(pH 6.0). Granules were pelleted, washed twice in buffer without synexin and fixed with 2% glutaraldehyde- 2% para formaldehyde in 0.1 M phosphate buffer (GA/PFA) for 30 min. Chromaffin cells were isolated and cultured for 3-5 days, and washed and incubated in Krebs solution with or without 20 uM nicotine. Cells were fixed 90 sec after on set of stimulation with GA/PFA for 30 min. Fixed granule or cell pellets were washed, infiltrated with 2.3 M sucrose in PBS, mounted and frozen in liquid N2.

scholarly journals Platypnoea–orthodeoxia syndrome induced by short-term weight loss: a case series

2020 ◽  
Author(s):  
Yudai Tamura ◽  
Tomohiro Sakamoto
Keyword(s):  
Weight Loss ◽  
Septal Defect ◽  
Case Series ◽  
Transoesophageal Echocardiography ◽  
Sitting Position ◽  
Short Time Period ◽  
Time Period ◽  
Uncommon Condition ◽  
The Right ◽  
Short Time

Abstract Background Platypnoea–orthodeoxia syndrome (POS) is an uncommon condition characterized by dyspnoea and arterial desaturation in the standing or sitting position that improves in the supine position. Case summary We report two cases of POS caused by an atrial septal defect (ASD) and a patent foramen ovale (PFO). Both cases reported a recent decrease in body weight of more than 10 kg in a short time period. Transoesophageal echocardiography (TOE) with agitated saline bubble study revealed and a large amount of contrast bubble through the ASD (Patient 1) or the PFO (Patient 2) from the right atrium to the left atrium in the sitting position. Both patients were diagnosed by the finding of positional dyspnoea and the results of TOE using agitated saline bubble contrast. Discussion Taken together, their presentations suggest that weight loss in a short time period could be a pathogenic factor for POS.

scholarly journals An Interoperability Platform Enabling Reuse of Electronic Health Records for Signal Verification Studies

2016 ◽  
Vol 2016 ◽  
pp. 1-18 ◽  
Author(s):  
Mustafa Yuksel ◽  
Suat Gonul ◽  
Gokce Banu Laleci Erturkmen ◽  
Ali Anil Sinaci ◽  
Paolo Invernizzi ◽  
...  
Keyword(s):  
Real Life ◽  
Case Series ◽  
Background Information ◽  
Data Sets ◽  
Local Data ◽  
Lombardy Region ◽  
Common Information ◽  
Spontaneous Reports ◽  
Wide Range ◽  
Common Information Model

Depending mostly on voluntarily sent spontaneous reports, pharmacovigilance studies are hampered by low quantity and quality of patient data. Our objective is to improve postmarket safety studies by enabling safety analysts to seamlessly access a wide range of EHR sources for collecting deidentified medical data sets of selected patient populations and tracing the reported incidents back to original EHRs. We have developed an ontological framework where EHR sources and target clinical research systems can continue using their own local data models, interfaces, and terminology systems, while structural interoperability and Semantic Interoperability are handled through rule-based reasoning on formal representations of different models and terminology systems maintained in the SALUS Semantic Resource Set. SALUS Common Information Model at the core of this set acts as the common mediator. We demonstrate the capabilities of our framework through one of the SALUS safety analysis tools, namely, the Case Series Characterization Tool, which have been deployed on top of regional EHR Data Warehouse of the Lombardy Region containing about 1 billion records from 16 million patients and validated by several pharmacovigilance researchers with real-life cases. The results confirm significant improvements in signal detection and evaluation compared to traditional methods with the missing background information.

1206P UNcommon EGFR mutations: International Case series on efficacy of Osimertinib in Real-life practice in first-liNe setting (UNICORN)

2021 ◽  
Vol 32 ◽  
pp. S961-S962
Author(s):  
J. Bar ◽  
W. Kian ◽  
M. Wolner ◽  
S. Derijcke ◽  
N. Girard ◽  
...  
Keyword(s):  
Real Life ◽  
Case Series ◽  
Egfr Mutations ◽  
First Line ◽  
Line Setting

scholarly journals Multipotent peripheral glial cells generate neuroendocrine cells of the adrenal medulla

Science ◽  
2017 ◽  
Vol 357 (6346) ◽  
pp. eaal3753 ◽  
Author(s):  
Alessandro Furlan ◽  
Vyacheslav Dyachuk ◽  
Maria Eleni Kastriti ◽  
Laura Calvo-Enrique ◽  
Hind Abdo ◽  
...  
Keyword(s):  
Adrenal Medulla ◽  
Chromaffin Cells ◽  
Gene Networks ◽  
System Development ◽  
Motor Nerve ◽  
Neuroendocrine Cells ◽  
Molecular Logic ◽  
Large Numbers ◽  
Cell Niche ◽  
Type Specification

Adrenaline is a fundamental circulating hormone for bodily responses to internal and external stressors. Chromaffin cells of the adrenal medulla (AM) represent the main neuroendocrine adrenergic component and are believed to differentiate from neural crest cells. We demonstrate that large numbers of chromaffin cells arise from peripheral glial stem cells, termed Schwann cell precursors (SCPs). SCPs migrate along the visceral motor nerve to the vicinity of the forming adrenal gland, where they detach from the nerve and form postsynaptic neuroendocrine chromaffin cells. An intricate molecular logic drives two sequential phases of gene expression, one unique for a distinct transient cellular state and another for cell type specification. Subsequently, these programs down-regulate SCP-gene and up-regulate chromaffin cell–gene networks. The AM forms through limited cell expansion and requires the recruitment of numerous SCPs. Thus, peripheral nerves serve as a stem cell niche for neuroendocrine system development.

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