scholarly journals Symmetric Telecom Regulation, Competition and Investment

2020 ◽  
Author(s):  
Anders Henten ◽  
Morten Falch
Keyword(s):  
Market Power ◽  
Potential Role ◽  
Electronic Communications ◽  
Eu Countries ◽  
The Past ◽  
Access Regulation ◽  
Asymmetric Regulation

Symmetric telecoms regulation, where it is not only the operators with significant market power (SMP) at national or large geographical scales which are subject to special access obligations, has been on the agenda for long. However, emphasis has hitherto been on asymmetric regulation, but during the past few years, symmetric regulation has gradually gained weight in different EU countries, and the new European Electronic Communications Code also aims at putting more emphasis on symmetric regulation. The paper identifies the reasons behind symmetric access regulation possibly coming to play a more prominent role in EU telecoms regulation, the scope of symmetric regulation and how it is being articulated, and what the possible implications of symmetric regulation could be on the level of investment. The contribution of the paper is to discuss these different elements of understanding the potential role of symmetric regulation.

Acid ceramidase, a double-edged sword in cancer aggression: A minireview

2020 ◽  
Vol 20 ◽  
Author(s):  
Helen Shiphrah Vethakanraj ◽  
Niveditha Chandrasekaran ◽  
Ashok Kumar Sekar
Keyword(s):  
Cell Fate ◽  
Cancer Progression ◽  
Potential Role ◽  
Tumour Progression ◽  
Acid Ceramidase ◽  
The Core ◽  
The Past ◽  
Sphingosine 1 Phosphate ◽  
Key Enzyme

: Acid ceramidase (AC), the key enzyme of the ceramide metabolic pathway hydrolyzes pro-apoptotic ceramide to sphingosine, which by the action of sphingosine-1-kinase is metabolized to mitogenic sphingosine-1-phosphate. The intracellular level of AC determines ceramide/sphingosine-1-phosphate rheostat which in turn decides the cell fate. The upregulated AC expression during cancerous condition acts as a “double-edged sword” by converting pro-apoptotic ceramide to anti-apoptotic sphingosine-1-phosphate, wherein on one end, the level of ceramide is decreased and on the other end, the level of sphingosine-1-phosphate is increased, thus altogether aggravating the cancer progression. In addition, cancer cells with upregulated AC expression exhibited increased cell proliferation, metastasis, chemoresistance, radioresistance and numerous strategies were developed in the past to effectively target the enzyme. Gene silencing and pharmacological inhibition of AC sensitized the resistant cells to chemo/radiotherapy thereby promoting cell death. The core objective of this review is to explore AC mediated tumour progression and the potential role of AC inhibitors in various cancer cell lines/models.

scholarly journals Anti-phospholipid syndrome and COVID-19 thrombosis: connecting the dots

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Moon Ley Tung ◽  
Bryce Tan ◽  
Robin Cherian ◽  
Bharatendu Chandra
Keyword(s):  
Endothelial Dysfunction ◽  
Severe Acute Respiratory Syndrome ◽  
Potential Role ◽  
Molecular Mimicry ◽  
Thromboembolic Events ◽  
The Past ◽  
High Prevalence ◽  
Connecting The Dots ◽  
Anti Phospholipid Syndrome

Abstract As the coronavirus disease 2019 (COVID-19) pandemic, which is caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is spreading rapidly worldwide, it has emerged as a leading cause of mortality, resulting in >1 million deaths over the past 10 months. The pathophysiology of COVID-19 remains unclear, posing a great challenge to the medical management of patients. Recent studies have reported an unusually high prevalence of thromboembolic events in COVID-19 patients, although the mechanism remains elusive. Several studies have reported the presence of aPLs in COVID-19 patients. We have noticed similarities between COVID-19 and APS, which is an autoimmune prothrombotic disease that is often associated with an infective aetiology. Molecular mimicry and endothelial dysfunction could plausibly explain the mechanism of thrombogenesis in acquired APS. In this review, we discuss the clinicopathological similarities between COVID-19 and APS, and the potential role of therapeutic targets based on the anti-phospholipid model for COVID-19 disease.

Nitric oxide: a new role in intensive care

2020 ◽  
Vol 22 (1) ◽  
pp. 72-79
Author(s):  
Alexandra Lee ◽  
◽  
Warwick Butt ◽  
◽  
◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Potential Role ◽  
Nitric Oxide Donors ◽  
Ischaemia Reperfusion Injury ◽  
Surface Receptors ◽  
The Past ◽  
Ischaemia Reperfusion ◽  
Human Experiments ◽  
Endogenous Nitric Oxide

Inhaled nitric oxide has been used for 30 years to improve oxygenation and decrease pulmonary vascular resistance. In the past 15 years, there has been increased understanding of the role of endogenous nitric oxide on cell surface receptors, mitochondria, and intracellular processes involving calcium and superoxide radicals. This has led to several animal and human experiments revealing a potential role for administered nitric oxide or nitric oxide donors in patients with systemic inflammatory response syndrome or ischaemia–reperfusion injury, and in patients for whom exposure of blood to artificial surfaces has occurred.

Fifty years ago: ‘The scope of occupational medicine in a university health service’

2020 ◽  
pp. 202-203
Author(s):  
Anthony Ryle
Keyword(s):  
Health Service ◽  
Physical Health ◽  
Occupational Medicine ◽  
Potential Role ◽  
Health And Safety ◽  
Academic Achievements ◽  
The Past ◽  
Selection Of

This series provides a selection of articles from the past. In Fifty years ago: The scope of occupational medicine in a university health service Anthony Ryle briefly explores the potential role of a University Health Service in relation to students’ academic achievements and failures, rather than their physical health and safety.

scholarly journals Endocrine Significance of SARS-CoV-2’s Reliance on ACE2

Endocrinology ◽  
2020 ◽  
Vol 161 (9) ◽  
Author(s):  
Eric Lazartigues ◽  
Mirza Muhammad Fahd Qadir ◽  
Franck Mauvais-Jarvis
Keyword(s):  
Potential Role ◽  
Renin Angiotensin System ◽  
Converting Enzyme ◽  
Angiotensin System ◽  
Angiotensin Converting Enzyme 2 ◽  
Global Impact ◽  
The Past ◽  
And Function ◽  
Endocrine Tissues

Abstract The current COVID-19 pandemic is the most disruptive event in the past 50 years, with a global impact on health care and world economies. It is caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), a coronavirus that uses angiotensin-converting enzyme 2 (ACE2) as an entry point to the cells. ACE2 is a transmembrane carboxypeptidase and member of the renin-angiotensin system. This mini-review summarizes the main findings regarding ACE2 expression and function in endocrine tissues. We discuss rapidly evolving knowledge on the potential role of ACE2 and SARS coronaviruses in endocrinology and the development of diabetes mellitus, hypogonadism, and pituitary and thyroid diseases.

PIG, TONE SANDHI AND WUMIN

1989 ◽  
Vol 18 (2) ◽  
pp. 163-182
Author(s):  
William L. Ballard
Keyword(s):  
Potential Role ◽  
Historical Linguistics ◽  
Tone Sandhi ◽  
Basic Principles ◽  
The Past ◽  
Language History ◽  
History Of ◽  
Chinese Dialects ◽  
Historical Relationship

Several scholars have made various remarks about the language history of the Wu and Min areas. Some of these remarks concern non-Chinese languages that may have been spoken in the area(s) and that may have left some traces in the forms of Chinese spoken there now (substrata). Other remarks concern the possible prehistory of what appear now to be transitional or mixed forms, or features that may be present due to some ancient influence or borrowing. In considering such matters it is important to keep in mind the basic principles (and biases) of historical linguistics, and of the potential role of philological materials in the discussion. My fieldwork in China this spring, as well as my research in the past, point to some special historical relationship between southern Wu and northern Min. This appears to mean that the boundaries between the northern and southern types of each of the two dialect groups are stronger than they have been portrayed in the past, and that the traditional boundary between Wu and Min is considerably weaker than has been supposed. The total sum of dialect facts cannot be ignored in trying to ascertain the language history of this area; it would appear that various elements of the traditional view of the history of the southern dialects are in error in various ways. In particular, it is at least possible that Wu and Min, in some sense, share a common ancestor not common to any other Chinese dialects.

scholarly journals Populações Celulares Periféricas (CD4+, CD8+ e CD19+) em Indivíduos Dislipidémicos

2013 ◽  
Vol 26 (6) ◽  
pp. 676
Author(s):  
Jose Pereira de Moura ◽  
Manuel Santos Rosa ◽  
Vera Alves ◽  
Anabela Mota Pinto ◽  
Victor Rodrigues ◽  
...  
Keyword(s):  
Potential Role ◽  
Inflammatory Cells ◽  
Control Group ◽  
Cd4 Cells ◽  
Reactive Protein ◽  
The Past ◽  
Markers Of Inflammation ◽  
The People ◽  
Risk Predictors

Introduction: The past decade has witnessed an increasing recognition that inflammatory mechanisms play a central role in the pathogenesis of atherosclerosis and its complications. Recently, attention was focused on the potential role of plasma markers of inflammation as risk predictors among those at risk for cardiovascular events. Of these potential markers, C-reactive protein (CRP), IL6, metalloproteinases, ICAM, VCAM and other molecules, have been extensively studied. On the other hand, to our knowledge, there are only a few studies on the role of inflammatory cells, like T and B lymphocytes in the atherosclerosis.Material and Methods: By Flow Cytrometry analysis we have determined on dyslipidemic people and on a control group, the percentage of some peripheral inflammatory cells, like CD3+, CD4+, CD8+, CD19+, CD56+, CD56CD8+, DN, CD25+, CD26+, CD25CD3+, CD26CD3+, CD25CD26CD3+, CCR5+, CCR5CD3+, CCR5CD4+, HLADR+, HLADRCD4+, HLADRCD8h+, HLADRCD8low+, HLADRCD8+, CD95+, CD95CD95L+, CD3CD95+, CD3CD95L+, CD62L+, CD3CD62L+, CD69+, CD69CD3+ e CD69CD4+.Results: In the present study we have particularly studied the percentage of CD4+, CD8+ and CD19+ cells. The CD4+ cells have been significantly reduced in the people with dyslipidemia.Discussion: We do not know the peripheral numbers of the subtype Th1 and Th2, neither the percentage of CD4+CD25+ cells (regulatory T cells). We have not find any differences on the percentage from the CD8+ and CD19+ cells.Conclusions: In spite of the identified limitations resulting from the small-sized samples, it was possible to show a reduction of some molecules after application of acetylsalicylic acid.

scholarly journals Environmental Degradation in Developing Countries: The Plight and Potential Role of Women

1970 ◽  
pp. 13
Author(s):  
Maya Abdel Rahim
Keyword(s):  
Developing Countries ◽  
Environmental Degradation ◽  
Potential Role ◽  
Environmental Problems ◽  
The Past ◽  
Role Of Women

The past two decades have witnessed a growing awareness of and concern with the ever-increasing magnitude of environmental problems, laying bare the societies and government's incomplete understanding of these problems and their inability to deal with them effectively.

scholarly journals POTENTIAL ROLE OF INTRAVITAL ARTERIAL EMBOLOGENIC THROMBI ON CARDIO-VASCULAR CATASTROPHIC EVENTS ACCORDING TO POSTMORTEM INVESTIGATIONS

2017 ◽  
Vol 9 (2) ◽  
pp. 60-66
Author(s):  
M V Melnikov ◽  
A V Sotnikov ◽  
S A Vinnichuk ◽  
V M Melnikov ◽  
D S Korostelev
Keyword(s):  
Left Atrial ◽  
High Probability ◽  
Potential Role ◽  
Aortic Wall ◽  
Left Atrial Appendage ◽  
Thrombus Formation ◽  
The Past ◽  
Ischemic Complications ◽  
Cardio Vascular

Aim. The purpose of our study was to value the role of potential arterial emboli sources in death cause according to postmortem data collected in deceased from all causes in a multifield hospital.Material and methods. We performed retrospective analysis of 1324 postmortem records of died pa- tients for the past 6 years (2011-2016). We registered patients’ age and sex, thrombus site, definite intravital clinical and anamnestic data, individual features of tanathogenesis.Results. Intravital thrombus formation was found in 64 of died patients (4,8%), mean age 73,9±2,7 years, women 51,5%. In 41 patients (1 group) there were firm wall thrombi in aorta, in 23 patients thrombi were found in heart cameras (2 group), mostly in left atrial appendage (LAA). Generalized atherosclerosis presented more often in 1 group - 95,5% vs 39,1 in 2 group (p<0,005). The most com- mon cause of death in both groups was acute myocardial infarction. In 1 group infarction was often in combination with acute blood supply disturbances in various arterial regions. For deceased of 2 group thromboembolic fatal events were more typical.Conclusion. It was found that the most dangerous thrombi regarding thromboembolic events were intracardiac ones, mainly in LAA. Aortic wall thrombi have become the marker of generalized athero- sclerosis. The last ones predetermined high probability of ischemic complications in multivessel areas.

scholarly journals Sphingolipid-Transporting Proteins as Cancer Therapeutic Targets

2019 ◽  
Vol 20 (14) ◽  
pp. 3554 ◽  
Author(s):  
Doaa Samaha ◽  
Housam H. Hamdo ◽  
Max Wilde ◽  
Kevin Prause ◽  
Christoph Arenz
Keyword(s):  
Potential Role ◽  
Therapeutic Targets ◽  
Transport Proteins ◽  
Biochemical Data ◽  
Sphingolipid Metabolism ◽  
Potential Target ◽  
The Past ◽  
Essential Components ◽  
Rate Limiting

The understanding of the role of sphingolipid metabolism in cancer has tremendously increased in the past ten years. Many tumors are characterized by imbalances in sphingolipid metabolism. In many cases, disorders of sphingolipid metabolism are also likely to cause or at least promote cancer. In this review, sphingolipid transport proteins and the processes catalyzed by them are regarded as essential components of sphingolipid metabolism. There is much to suggest that these processes are often rate-limiting steps for metabolism of individual sphingolipid species and thus represent potential target structures for pharmaceutical anticancer research. Here, we summarize empirical and biochemical data on different proteins with key roles in sphingolipid transport and their potential role in cancer.

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