Publications by authors named "Nikolaou M"

Sarcopenia, an age-related decline in skeletal muscle mass, strength, and function, is increasingly recognized as a significant condition in the aging population, particularly among those with cardiovascular diseases (CVD). This review provides a comprehensive synthesis of the interplay between sarcopenia and cardiogeriatrics, emphasizing shared mechanisms such as chronic low-grade inflammation (inflammaging), hormonal dysregulation, oxidative stress, and physical inactivity. Despite advancements in diagnostic frameworks, such as the EWGSOP2 and AWGS definitions, variability in criteria and assessment methods continues to challenge standardization.

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Metabolic disorders, including type 2 diabetes mellitus (T2DM), obesity, and metabolic syndrome, are systemic conditions that profoundly impact the skin microbiota, a dynamic community of bacteria, fungi, viruses, and mites essential for cutaneous health. Dysbiosis caused by metabolic dysfunction contributes to skin barrier disruption, immune dysregulation, and increased susceptibility to inflammatory skin diseases, including psoriasis, atopic dermatitis, and acne. For instance, hyperglycemia in T2DM leads to the formation of advanced glycation end products (AGEs), which bind to the receptor for AGEs (RAGE) on keratinocytes and immune cells, promoting oxidative stress and inflammation while facilitating Staphylococcus aureus colonization in atopic dermatitis.

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Cardiovascular-Kidney-Metabolic syndrome, introduced by the American Heart Association in 2023, represents a complex and interconnected spectrum of diseases driven by shared pathophysiological mechanisms. However, this framework notably excludes the liver-an organ fundamental to metabolic regulation. Building on this concept, Cardiovascular-Renal-Hepatic-Metabolic (CRHM) syndrome incorporates the liver's pivotal role in this interconnected disease spectrum, particularly through its involvement via metabolic dysfunction-associated steatotic liver disease (MASLD).

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: Melanoma, an aggressive form of skin cancer, accounts for a significant proportion of skin-cancer-related deaths worldwide. Early and accurate differentiation between melanoma and benign melanocytic nevi is critical for improving survival rates but remains challenging because of diagnostic variability. Convolutional neural networks (CNNs) have shown promise in automating melanoma detection with accuracy comparable to expert dermatologists.

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Treatment of serious bacterial infections with antimicrobial agents, such as antibiotics, is a major clinical challenge, because of growing bacterial resistance to multiple agents. Combination therapy (i.e.

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The global rise in obesity underscores the need for effective weight management strategies that address individual metabolic and hormonal variability, moving beyond the simplistic "calories in, calories out" model. Body types-ectomorph, mesomorph, and endomorph-provide a framework for understanding the differences in fat storage, muscle development, and energy expenditure, as each type responds uniquely to caloric intake and exercise. Variability in weight outcomes is influenced by factors such as genetic polymorphisms and epigenetic changes in hormonal signaling pathways and metabolic processes, as well as lifestyle factors, including nutrition, exercise, sleep, and stress.

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Heart failure (HF) remains a major cause of morbidity and mortality worldwide. While standard treatments primarily target neurohormonal pathways, emerging evidence highlights the significant role of hormonal deficiencies, such as impaired growth hormone (GH) signaling, in HF progression and outcomes. GH is crucial for cardiovascular and skeletal muscle function, and its deficiency has been associated with worse prognosis.

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Objective: Ghrelin is emerging as a promising therapeutic option for heart failure (HF) due to its potent inotropic, anabolic, and cardioprotective properties. This review aims to critically examine the available clinical evidence on ghrelin therapy in HF, while also incorporating key findings from preclinical studies that support its therapeutic potential.

Methods: A comprehensive search was conducted in PubMed and the Cochrane Library up to September 15, 2024, using the keywords "heart failure" and "ghrelin.

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Background: Cardiometabolic heart failure with preserved ejection fraction (HFpEF) is largely driven by obesity-related factors, including adipokines and bioactive peptides primarily secreted by the adipose tissue, such as leptin, adiponectin, and resistin. These molecules link metabolic dysregulation to cardiovascular dysfunction, influencing HFpEF progression and patient outcomes Methods: A comprehensive literature search was conducted in PubMed up to 20 November 2024, using keywords and MeSH terms, such as "HFpEF", "adipokines", "leptin", "adiponectin", and "resistin", yielding 723 results. Boolean operators refined the search, and reference lists of key studies were reviewed.

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The emergence of antimicrobial resistance (AMR) due to the misuse and overuse of antibiotics has become a critical threat to global public health. There is a dire need to forecast AMR to understand the underlying mechanisms of resistance for the development of effective interventions. This paper explores the capability of machine learning (ML) methods, particularly unsupervised learning methods, to enhance the understanding and prediction of AMR.

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Article Synopsis
  • This study investigates the effects of growth hormone (GH) therapy on heart failure (HF), especially for patients with hormonal deficiencies.
  • The research involved a systematic review, identifying 17 out of 1,184 studies that met stringent criteria for evaluating GH therapy's safety and efficacy.
  • Results showed that GH therapy significantly improved heart function, exercise capacity, and reduced serious HF complications, with the most benefit seen in specific patient groups; further trials are needed to confirm these outcomes.
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The process of aging leads to a progressive decline in the immune system function, known as immunosenescence, which compromises both innate and adaptive responses. This includes impairments in phagocytosis and decreased production, activation, and function of T- and B-lymphocytes, among other effects. Bacteria exploit immunosenescence by using various virulence factors to evade the host's defenses, leading to severe and often life-threatening infections.

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Antibiotic resistance presents a critical challenge in healthcare, particularly among the elderly, where multidrug-resistant organisms (MDROs) contribute to increased morbidity, mortality, and healthcare costs. This review focuses on the mechanisms underlying resistance in key bacterial pathogens and highlights how aging-related factors like immunosenescence, frailty, and multimorbidity increase the burden of infections from MDROs in this population. Novel strategies to mitigate resistance include the development of next-generation antibiotics like teixobactin and cefiderocol, innovative therapies such as bacteriophage therapy and antivirulence treatments, and the implementation of antimicrobial stewardship programs to optimize antibiotic use.

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  • - As the population ages, older adults (65+) are undergoing more surgeries, which leads to increased risks due to health issues like comorbidities, polypharmacy, and frailty.
  • - Traditional risk assessment tools often fail to predict post-operative outcomes for the elderly, but Comprehensive Geriatric Assessment (CGA) effectively identifies patients at risk for complications such as delirium and infections.
  • - CGA not only predicts risks but also aids in tailoring personalized perioperative care, improving surgical outcomes and preventing functional decline among older patients.
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  • * The review discusses how machine learning (ML) combined with various omics technologies can help identify the molecular traits of aging, like genomic instability and chronic inflammation.
  • * By applying ML to complex data, researchers can find new biomarkers and treatment targets for personalized anti-aging strategies, improving our understanding of aging to enhance health and longevity.
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  • This study examines mortality trends in Greece from 2001 to 2020, highlighting the impact of the COVID-19 pandemic, particularly in an aging population, which can inform health policies in other similar societies.
  • Data on deaths and population were analyzed using age-standardized mortality rates (ASMR) and cause-specific rates across different age groups, revealing significant trends in cardiovascular diseases and other major causes of death.
  • Findings showed a notable decrease in ASMR for cardiovascular diseases, although hypertensive diseases rose significantly; the leading causes of death shifted based on age, emphasizing the need for updated health strategies in response to these trends.
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This study investigates the forecasting of cardiovascular mortality trends in Greece's elderly population. Utilizing mortality data from 2001 to 2020, we employ two forecasting models: the Autoregressive Integrated Moving Average (ARIMA) and Facebook's Prophet model. Our study evaluates the efficacy of these models in predicting cardiovascular mortality trends over 2020-2030.

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Population aging is a global phenomenon driving research focus toward preventing and managing age-related disorders. Functional hypogonadism (FH) has been defined as the combination of low testosterone levels, typically serum total testosterone below 300-350 ng/dL, together with manifestations of hypogonadism, in the absence of an intrinsic pathology of the hypothalamic-pituitary-testicular (HPT) axis. It is usually seen in middle-aged or elderly males as a product of aging and multimorbidity.

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The radiological examination frequency, i.e. the number of examinations performed annually, is necessary for estimating the collective effective dose of the population from medical exposures with ionizing radiation.

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  • Targeting the estrogen receptor alpha (ERα) pathway is a proven strategy for treating estrogen receptor-positive (ER+) breast cancers, leading to the development of a new type of drug called a PROTAC designed to degrade ERα.
  • In laboratory tests, this PROTAC showed strong effectiveness in degrading ERα and blocking its activity in breast cancer cells, but results did not match when tested in live models.
  • The discrepancy is attributed to the PROTAC’s linker being metabolically unstable, which leads to the creation of competing metabolites that interfere with the drug's ability to degrade ERα; this emphasizes the importance of designing more stable PROTACs for better treatment outcomes.
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The escalating use of Computed Tomography (CT) imaging necessitates establishment and periodic revision of Diagnostic Reference Levels (DRLs) to ensure patient protection optimization. This paper presents the outcomes of a national survey conducted from 2019 to 2022, focusing on revising DRLs for adult CT examinations. Dosimetric data from 127 scanners in 120 medical facilities, representing 25% of the country's CT scanners, were collected, emphasizing geographic distribution and technology representation.

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Background: New-onset postoperative atrial fibrillation (POAF) after coronary artery bypass surgery (CABG) occurs with an incidence of 20-40%. The clinical relevance of POAF remains a concern, and the need for further studies regarding the clinical management of POAF is necessary.

Aim: The AFRODITE study, a prospective multicenter cohort study, had as its primary endpoint the evaluation of AF recurrence in patients post CABG over a one-year period.

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Background: Pseudomyxoma peritonei (PMP) is a clinical entity of subtle onset abdominal pain, ascites, and distention associated with characteristic imaging. In most cases, laparoscopic exploration will give the definitive diagnosis and histopathologic verification. However, usually there are difficulties in the diagnosis of this disease.

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Ionizing radiation is strongly linked to direct or indirect DNA damage, as with the production of reactive oxygen species (ROS), which in turn produce DNA damage products, such as 8-hydroxy-2-deoxyguanosine (8-OHdG). In this study, we aimed to investigate the formation of 8-OHdG after irradiation in patients with non-small cell cancer (NSCLC) and its use as a biomarker. Sixteen patients with squamous and thirty-six patients with non-squamous pathology were included.

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Testicular cancer is the most common neoplasm in young males. The early diagnosis and the appropriate treatment make it a curable malignancy in over 90% of the patients, but 6% of the patients with testicular cancer develop a second, mostly treatment-related, malignancy in another primary site many years after the first diagnosis. The simultaneous appearance of a testicular tumor with another primary neoplasm is rarely described in the literature.

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