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The Journal of Biomedical Research 2020年第1期34卷 14-26页

作者： Evangelia Zvintzou Eva Xepapadaki Christina Kalogeropoulou Serafoula Filou kyriakos ekypreos Department of Pharmacology University of Patras Medical SchoolRio AchaiasTK 26500Greece

Apolipoprotein A-Ⅱ(APOA-Ⅱ) is the second most abundant apolipoprotein of high-density lipoprotein(HDL)synthesized mainly by the liver and to a much lesser extent by the intestine. Transgenic mice overexpressing human APOA-Ⅱ present abnormal lipoprotein composition and are prone to atherosclerosis, though in humans the role for APOA-Ⅱ in coronary heart disease remains controversial. Here, we investigated the effects of overexpressed APOA-Ⅱ on HDL structure and function, adipose tissue metabolic activity, glucose tolerance and insulin sensitivity. C57BL/6 mice were infected with an adenovirus expressing human APOA-Ⅱ or a control adenovirus Ad GFP, and five days post-infection blood and tissue samples were isolated. APOA-Ⅱ expression resulted in distinct changes in HDL apoproteome that correlated with increased antioxidant and anti-inflammatory activities. No effects on cholesterol efflux from RAW 264.7 macrophages were observed. Molecular analyses in white adipose tissue(WAT) indicated a stimulation of oxidative phosphorylation coupled with respiration for ATP production in mice overexpressing APOA-Ⅱ. Finally, overexpressed APOA-Ⅱ improved glucose tolerance of mice but had no effect on the response to exogenously administered insulin. In summary, expression of APOA-Ⅱ in C57BL/6 mice results in pleiotropic effects with respect to HDL functionality, adipose tissue metabolism and glucose utilization, many of which are beneficial to health.

关键词： apolipoprotein A-Ⅱ high-density lipoprotein adipose tissue glucose tolerance insulin sensitivity

Overview of the Association Between Non-Alcoholic Fatty Liver Disease and Hypertension

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Cardiology Discovery 2024年第1期4卷 30-37页

作者： Niki S.Kakouril Costas G.Thomopoulos Eirini P.Siafi Angeliki E.Valatsoul kyriakos S.Dimitriadis Iliana P.Mani Sotirios P.Patsilinakos Dimitrios M.Tousoulis Konstantinos P.Tsioufis First Department of Cardiology Medical SchoolNational and Kapodistrian University of AthensHippokration HospitalAthens 11527Greece Department of Cardiology Elena Venizelou HospitalAthens 11521Greece Department of Cardiology General Hospital Agia OlgaAthens 14233Greece

Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease, and its prevalence is rising. NAFLD is closely associated with metabolic syndrome, with both conditions sharing common clinical characteristics such as obesity, insulin resistance, type 2 diabetes mellitus, hypertension, and hypertriglyceridemia. Several observational studies have evaluated the relationship between NAFLD and hypertension, with the overall evidence suggesting a bidirectional relationship. It is hypothesized that activation of the sympathetic nervous and renin-angiotensin systems, observed in NAFLD with or without insulin resistance promotes the development of hypertension. In patients with hypertension, activation of these systems can lead to hepatic fibrosis and progressive inflammation through increased oxidative stress and activation of hepatic stellate cells and Kupffer cells. The present review examines the pathophysiologic and clinical evidence supporting the bidirectional association between NAFLD and hypertension.

关键词： Hypertension Non-alcoholic fatty liver disease Insulin resistance Sympathetic nervous system Metabolic syndrome

Indications for the surgical management of pancreatic trauma: An update

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World Journal of Gastrointestinal Surgery 2022年第6期14卷 538-543页

作者： Efstathios Theodoros Pavlidis kyriakos Psarras Nikolaos G Symeonidis Georgios Geropoulos Theodoros Efstathios Pavlidis 2^(nd) Propedeutic Department of Surgery School of MedicineAristotle UniversityThessaloniki 54642Greece Department of General Surgery University College London HospitalsLondon NW12BUUnited Kingdom

Pancreatic trauma is rare compared to other abdominal solid organ injuries,accounting for 0.2%-0.3% of all trauma patients. Moreover, this type of injury may frequently be overlooked or not readily appreciated on initial clinical examinations and investigations. The organ injury scale determines the severity of the trauma. Nonetheless, there are conflicting recommendations for the best strategy in severe cases. Overall, conservative management of induced severe traumatic pancreatitis is adequate. Modern imaging modalities such as ultrasound scanning and computed tomography scanning can detect injuries in fewer than 60% of patients. However, magnetic resonance cholangiopancreatography and endoscopic retrograde cholangiopancreatography(ERCP) have diagnostic accuracies approaching 90%-100%. Thus, management options include ERCP and stent placement or distal pancreatectomy in cases of complete gland transection and wide drainage only for damage control surgery, which can prevent mortality but increases the risk of morbidity. In the majority of cases, surgical intervention is not required and should be reserved for only severe grade Ⅲ to grade Ⅴ injuries.

关键词： Pancreas Acute pancreatitis Abdominal trauma Pancreatic traumatic injury Emergency surgery Damage control surgery

Taking central nervous system regenerative therapies to the clinic: curing rodents versus nonhuman primates versus humans

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Neural Regeneration Research 2020年第3期15卷 425-437页

作者： Magdalini Tsintou kyriakos Dalamagkas Nikos Makris Departments of Psychiatry and Neurology Services Center for Neural Systems InvestigationsCenter for Morphometric AnalysisAthinoula A.Martinos Center for Biomedical ImagingMassachusetts General HospitalHarvard Medical SchoolBostonMAUSA Department of Psychiatry Psychiatry Neuroimaging LaboratoryBrigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA University College of London Division of Surgery&Interventional Science Center for Nanotechnology&Regenerative MedicineUniversity College LondonLondonUK Department of Physical Medicine and Rehabilitation The University of Texas Health Science Center at HoustonHoustonTXUSA The Institute for Rehabilitation and Research Memorial Hermann Research Center The Institute for Rehabilitation and Research Memorial Hermann HospitalHoustonTXUSA Department of Anatomy&Neurobiology Boston University School of MedicineBostonMAUSA

The central nervous system is known to have limited regenerative *** only does this halt the human body’s reparative processes after central nervous system lesions,but it also impedes the establishment of effective and safe therapeutic options for such *** the high prevalence of stroke and spinal cord injury in the general population,these conditions remain incurable and place a heavy burden on patients’families and on society more *** and neural engineering are diverse biomedical fields that attempt reparative treatments,utilizing stem cells-based strategies,biologically active molecules,nanotechnology,exosomes and highly tunable biodegradable systems(e.g.,certain hydrogels).Although there are studies demonstrating promising preclinical results,safe clinical translation has not yet been accomplished.A key gap in clinical translation is the absence of an ideal animal or ex vivo model that can perfectly simulate the human microenvironment,and also correspond to all the complex pathophysiological and neuroanatomical factors that affect functional outcomes in humans after central nervous system *** an ideal model does not currently exist,but it seems that the nonhuman primate model is uniquely qualified for this role,given its close resemblance to *** review considers some regenerative therapies for central nervous system repair that hold promise for future clinical *** addition,it attempts to uncover some of the main reasons why clinical translation might fail without the implementation of nonhuman primate models in the research pipeline.

关键词： animal models central nervous system regeneration clinical translation exosomes hydrogels neural tissue engineering nonhuman primates spinal cord injury stem cells stroke

Event-Triggered Optimal Adaptive Control Algorithm for Continuous-Time Nonlinear Systems

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IEEE/CAA Journal of Automatica Sinica 2014年第3期1卷 282-293页

作者： kyriakos G.Vamvoudakis the Center for Control Dynamicalsystems and Computation(CCDC)University of California

This paper proposes a novel optimal adaptive eventtriggered control algorithm for nonlinear continuous-time *** goal is to reduce the controller updates,by sampling the state only when an event is triggered to maintain stability and *** online algorithm is implemented based on an actor/critic neural network structure.A critic neural network is used to approximate the cost and an actor neural network is used to approximate the optunal event-triggered *** in the algorithm proposed there are dynamics that exhibit continuous evolutions described by ordinary differential equations and instantaneous jumps or impulses,we will use an impulsive system approach.A Lyapunov stability proof ensures that the closed-loop system is asymptotically ***,we illustrate the effectiveness of the proposed solution compared to a timetriggered controller.

关键词： Learning (artificial intelligence) Heuristic algorithms Neural networks Nonlinear systems Bandwidth Linear systems Adaptive control

Helicobacter pylori,gastric microbiota and gastric cancer relationship:Unrolling the tangle

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World Journal of Gastrointestinal Oncology 2022年第5期14卷 959-972页

作者： Christos Liatsos Apostolis Papaefthymiou Nikolaos kyriakos Michail Galanopoulos Michael Doulberis Marios Giakoumis Evangelia Petridou Christos Mavrogiannis Theodore Rokkas Jannis Kountouras Department of Gastroenterology 401 General Military Hospital of AthensAthens 11525Greece Gastroenterology University Hospital of LarissaLarissa 41336Greece Division of Gastroenterology and Hepatology Medical University DepartmentKantonsspital AarauAarau 1234Switzerland Department of Microbiology “Agia Sofia”Paediatric HospitalGoudiAthens 11527Greece Gastrointestinal and Liver Unit Faculty of NursingKifissia General and Oncology HospitalKaliftakiN.Kifisia 14564Greece Gastroenterological Clinic Henry Dunant HospitalAthens 11525Greece Department of Internal Medicine Second Medical ClinicIppokration HospitalAristotle University of ThessalonikiThessaloniki 41336MacedoniaGreece

Helicobacter pylori infection(Hp-I)represents a typical microbial agent intervening in the complex mechanisms of gastric homeostasis by disturbing the balance between the host gastric microbiota and mucosa-related factors,leading to inflammatory changes,dysbiosis and eventually gastric *** normal gastric microbiota shows diversity,with Proteobacteria[Helicobacter pylori(***)belongs to this family],Firmicutes,Actinobacteria,Bacteroides and Fusobacteria being the most abundant *** studies indicate that *** has inhibitory effects on the colonization of other bacteria,harboring a lower diversity of them in the *** comparing the healthy with the diseased stomach,there is a change in the composition of the gastric microbiome with increasing abundance of ***(where present)in the gastritis stage,while as the gastric carcinogenesis cascade progresses to gastric cancer,the oral and intestinal-type pathogenic microbial strains ***-I creates a premalignant environment of atrophy and intestinal metaplasia and the subsequent alteration in gastric microbiota seems to play a crucial role in gastric tumorigenesis *** *** eradication is suggested to restore gastric microbiota,at least in primary *** is more than clear that Hp-I,gastric microbiota and gastric cancer constitute a challenging tangle and the strong interaction between them makes it difficult to *** studies are considered of crucial importance to test the complex interaction on the modulation of the gastric microbiota by *** as well as on the relationships between the gastric microbiota and gastric carcinogenesis.

关键词： Helicobacter pylori infection Gastric microbiota Gastric cancer Oncogenesis Dysbiosis Helicobacter pylori eradication

COVID-19 and liver injury in individuals with obesity

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World Journal of Gastroenterology 2023年第6期29卷 908-916页

作者： Ioannis G Lempesis Eleni Karlafti Petros Papalexis George Fotakopoulos kyriakos Tarantinos Vasileios Lekakis Stavros P Papadakos Evangelos Cholongitas Vasiliki E Georgakopoulou Institute of Metabolism and Systems Research University of BirminghamBirminghamB152TTUnited Kingdom Department of Human Biology NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht University Medical CentreMaastricht 6166200Netherlands Department of Emergency AHEPA University HospitalAristotle University of ThessalonikiThessaloniki 54621Greece Unit of Endocrinology First Department of Internal MedicineLaiko General HospitalNational and Kapodistrian University of AthensAthens 11527Greece Department of Biomedical Sciences University of West AtticaAthens 12243Greece Department of Neurosurgery General University Hospital of LarisaLarisa 41221Greece First Pulmonology Department Sismanogleio HospitalAthens 15126Greece Department of Gastroenterology Laiko General HospitalNational and Kapodistrian University of AthensAthens 11527Greece First Department of Internal Medicine Laiko General HospitalMedical SchoolNational and Kapodistrian University of AthensAthens 11527Greece Department of Infectious Diseases-COVID-19 Unit Laiko General HospitalAthens 11527Greece

Coronavirus disease 2019 is an infectious disease caused by the severe acute respiratory syndrome coronavirus 2 that manifests as a variety of clinical manifestations,including liver damage commonly detected by a hepatocellular pattern from liver function *** injury is associated with a worse prognosis *** associated with the severity of the disease include obesity and cardiometabolic comorbidities,which are also associated with nonalcoholic fatty liver disease(NAFLD).The presence of NAFLD,similarly to obesity,is associated with an unfavourable impact on the coronavirus disease 2019 *** with these conditions could present with liver damage and elevated liver function tests due to direct viral cytotoxicity,systemic inflammation,ischemic or hypoxic liver damage or drug side ***,liver damage in the setting of NAFLD could also be attributed to a pre-existing chronic low-grade inflammation associated with surplus and dysfunctional adipose tissue in these *** we investigate the hypothesis that a pre-existing inflammatory status is exacerbated after severe acute respiratory syndrome coronavirus 2 infection,which embodies a second hit to the underestimated liver damage.

关键词： COVID-19 SARS-CoV-2 Non-alcoholic fatty liver disease Obesity Inflammation Liver Adipose tissue

Advances in regenerative therapies for spinal cord injury:a biomaterials approach

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Neural Regeneration Research 2015年第5期10卷 726-742页

作者： Magdalini Tsintou kyriakos Dalamagkas Alexander Marcus Seifalian UCL Centre for Nanotechnology & Regenerative Medicine Division of Surgery and Interventional ScienceUniversity College of London Royal Free London NHS Foundation Trust Hospital

Spinal cord injury results in the permanent loss of function, causing enormous personal, social and economic problems. Even though neural regeneration has been proven to be a natural mech- anism, central nervous system repair mechanisms are ineffective due to the imbalance of the inhibitory and excitatory factors implicated in neuroregeneration. Therefore, there is growing re- search interest on discovering a novel therapeutic strategy for effective spinal cord injury repair. To this direction, cell-based delivery strategies, biomolecule delivery strategies as well as scaf- fold-based therapeutic strategies have been developed with a tendency to seek for the answer to a combinatorial approach of all the above. Here we review the recent advances on regenerativel neural engineering therapies for spinal cord injury, aiming at providing an insight to the most promising repair strategies, in order to facilitate future research conduction.

关键词： tissue engineering neuroregeneration repair central nervous system biomaterial regenerative medicine nanotechnology spinal cord injury

Stem cells for spinal cord injuries bearing translational potential

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Neural Regeneration Research 2018年第1期13卷 35-42页

作者： kyriakos Dalamagkas Magdalini Tsintou Alexander M.Seifalian Department of Tissue Engineering Harvard Medical School Nanotechnology & Regenerative Medicine Centre Division of Surgery and Interventional Science University College London Nanotechnology & Regenerative Medicine Commercialisation Centre (Ltd). The London Bio Science Innovation Centre

Spinal cord injury （SCI） is a highly debilitating neurological disease, which still lacks effective treatment strategies, causing significant financial burden and distress to the affected families. Nevertheless, nanotechnology and regenerative medicine strategies holding promise for the development of novel therapies that would reach from bench to bedside to serve the SCI patients. There has already been significant progress in the field of cell-based therapies, with the clinical application for SCI, currently in phase II of the clinical trial. Stem cells （e.g., induced pluripotent stem cells, fetal stem cells, human embryonic stem cells, and olfactory ensheathing cells） are certainly not to be considered the panacea for neural repair but, especially when combined with rehabilitation or other combinatorial approaches using the help of nanotechnology, they seem to be the source of some of the most promising and clinical translatable cell-based therapies that could help solving impactful problems on neural repair.

关键词： spinal cord injury stem cells neuroregeneration plasticity repair

Radiofrequency ablation-assisted liver resection a step toward bloodless liver resection

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Hepatobiliary & Pancreatic Diseases International 2015年第1期14卷 69-74页

作者： Athanasios Petrou kyriakos Neofytou Constantinos Mihas Jessamy Bagenal Michael Kontos John Griniatsos Evangelos Felekouras Nicosia Surgical Department Division of Hepatobiliary Pancreatic Surgery Nicosia General Hospital First Department of Surgery University of Athens Medical School LAIKO Teaching Hospital Bristol Heart Institute Severn School of Surgery

BACKGROUND： Liver resection is currently the most efficient curative approach for a wide variety of liver tumors. The application of modern techniques and new surgical devices has improved operative outcomes. Radiofrequency ablation is used more often for liver parenchymal transection. This study aimed to assess the efficacy and safety of radiofrequency ablation-assisted liver ***： A retrospective study of 145 consecutive patients who underwent radiofrequency ablation-assisted liver resection was performed. Intraoperative blood loss, need for transfusion or intraoperative Pringle maneuver, the duration of liver parenchymal transection, perioperative complications, and postoperative morbidity and mortality were all ***： Fifty minor and ninety-five major liver resections were performed. The mean intraoperative blood loss was 251 m L, with a transfusion rate of 11.7%. The Pringle maneuver was necessary in 12 patients（8.3%）. The mean duration for parenchymal transection was 51.75 minutes. There were 47 patients（32.4%） with postoperative complications. There is no mortality within 30 days after surgery. CONCLUSIONS： Radiofrequency ablation-assisted liver resection permits both major and minor liver resections with minimal blood loss and without occlusion of hepatic inflow. Furthermore it decreases the need for blood transfusion and reduces morbidity and mortality.

关键词： bleeding complications hepatectomy radiofrequency ablation Pringle maneuver