Alexandros Sagkriotis

Mr. Alexandros Sagkriotis

orcid

Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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11 November 2015 in BMC Cancer
Verified
Journal Article
Open access
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XPXeni Provatopoulou
Xeni Provatopoulou
GGGeorgia P. Georgiou
Georgia P. Georgiou
EKEleni Kalogera
Eleni Kalogera
VKVasileios Kalles
Vasileios Kalles
MMMaria Matiatou
Maria Matiatou
AGAntonia Gounaris
Antonia Gounaris
Irisin is a recently discovered myokine, involved in the browning of white adipose tissue. To date, its function has been mainly associated with energy homeostasis and metabolism, and it has been proposed as a promising therapeutic target for obesity and metabolic diseases. This is the first study investigating the role of irisin in human breast cancer. Participants included one hundred and one (101) female patients with invasive ductal breast cancer and fifty one (51) healthy women. Serum levels of irisin, leptin, adiponectin and resistin were quantified in duplicates by ELISA. Serum levels of CEA, CA 15–3 and Her-2/neu were measured on an immunology analyzer. The association between irisin and breast cancer was examined by logistic regression analysis. The feasibility of serum irisin in discriminating breast cancer patients was assessed by ROC curve analysis. Potential correlations with demographic, anthropometric and clinical parameters, with markers of adiposity and with breast tumor characteristics were also investigated. Serum levels of irisin were significantly lower in breast cancer patients compared to controls (2.47 ± 0.57 and 3.24 ± 0.66 μg/ml, respectively, p < 0.001). A significant independent association between irisin and breast cancer was observed by univariate and multivariate analysis (p < 0.001). It was estimated that a 1 unit increase in irisin levels leads to a reduction in the probability of breast cancer by almost 90 %. Irisin could effectively discriminate breast cancer patients at a cut-off point of 3.21 μg/ml, with 62.7 % sensitivity and 91.1 % specificity. A positive association with tumor stage and marginal associations with tumor size and lymph node metastasis were observed (p < 0.05, p < 0.01, p < 0.01, respectively). Our novel findings implicate irisin in breast cancer and suggest its potential application as a new diagnostic indicator of the presence of disease.

11 May 2015 in Epilepsia
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Journal Article
Open access
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DTDorothea Kasteleijn-Nolst Trenite
Dorothea Kasteleijn-Nolst Trenite
CBChristian Brandt
Christian Brandt
TMThomas Mayer
Thomas Mayer
Felix RosenowFelix Rosenow
Felix Rosenow
BSBernd Schmidt
Bernd Schmidt
KKKlaus Kucher
Klaus Kucher
Summary: Objective: Examine the efficacy of a competitive α‐amino‐3‐hydroxy‐5‐methyl‐4‐isoxazolepropionic acid (AMPA)/kainate glutamate receptor antagonist, selurampanel (BGG492), in the human photostimulation model.Methods: Patients with epilepsy and a generalized epileptiform electroencephalography response to intermittent photic stimulation (photoparoxysmal response or PPR; diagnosed ≥6 months prior to initial study dosing) were enrolled in a phase II, multicenter, single‐blind, within‐subject, placebo‐controlled proof‐of‐concept (PoC) study. PPR was used as a biomarker to assess the efficacy and safety of BGG492 in three cohorts (cohorts I–III received BGG492 50, 100, and 15 mg, respectively). Primary endpoints were to evaluate the efficacy of single oral BGG492 doses in abolishment of PPR or a relevant reduction of the standardized photoparoxysmal response (SPR), and to evaluate time of onset and duration of response. Secondary endpoints were to evaluate maximal SPR reduction, determine the pharmacokinetic profile of BGG492, explore the pharmacokinetic/pharmacodynamic relationship, and evaluate the safety and tolerability of BGG492.Results: Ten patients were enrolled, with three participating twice, that is, in two cohorts (n = 13). Treatment with BGG492 resulted in abolition of PPR in seven of 13 patients in a dose‐dependent manner: three, three, and one patient in cohorts I–III, respectively. All patients showed treatment‐related reductions of SPR range of at least three steps in at least one eye condition (eye closure, eyes closed, or eyes open). Generally, onset of the suppressive effect appeared to be within 1–2 h post‐BGG492 dose and continued in three patients at the 50‐ and 100‐mg doses for 29–33 h. Most common adverse events across the BGG492‐treated groups were headache and nasopharyngitis (three patients each), followed by dizziness, fatigue, and diarrhea (two patients each).Significance: The dose‐dependent positive effect of BGG492 on the PPR and SPR in patients with photosensitive epilepsy in this proof‐of‐concept study supports further investigation of AMPA receptor antagonists in large‐scale phase III trials.

13 June 2022 in JMIR Cancer
Verified
Journal Article
Open access
JCJyoti Chauhan
Jyoti Chauhan
SASathyaraj Aasaithambi
Sathyaraj Aasaithambi
IMIvan Marquez-Rodas
Ivan Marquez-Rodas
LFLuigi Formisano
Luigi Formisano
SPSophie Papa
Sophie Papa
ASAlexandros Sagkriotis
Alexandros Sagkriotis
Background: Cutaneous melanoma is an aggressive malignancy that is proposed to account for 90% of skin cancer–related mortality. Individuals with melanoma experience both physical and psychological impacts associated with their diagnosis and treatment. Health-related information is being increasingly accessed and shared by stakeholders on social media platforms. Objective: This study aimed to assess how individuals living with melanoma across 14 European countries use social media to discuss their needs and provide their perceptions of the disease. Methods: Social media sources including Twitter, forums, and blogs were searched using predefined search strings of keywords relating to melanoma. Manual and automated relevancy approaches filtered the extracted data for content that provided patient-centric insights. This contextualized data was then mined for insightful concepts around the symptoms, diagnosis, treatment, impacts, and lived experiences of melanoma. Results: A total of 182,400 posts related to melanoma were identified between November 2018 and November 2020. Following exclusion of irrelevant posts and using random sampling methodology, 864 posts were identified as relevant to the study objectives. Of the social media channels included, Twitter was the most commonly used, followed by forums and blogs. Most posts originated from the United Kingdom (n=328, 38%) and Spain (n=138, 16%). Of the relevant posts, 62% (n=536) were categorized as originating from individuals with melanoma. The most frequently discussed melanoma-related topics were treatment (436/792, 55%), diagnosis and tests (261/792, 33%), and remission (190/792, 24%). The majority of treatment discussions were about surgery (292/436, 67%), followed by immunotherapy (52/436, 12%). In total, 255 posts discussed the impacts of melanoma, which included emotional burden (n=179, 70%), physical impacts (n=61, 24%), effects on social life (n=43, 17%), and financial impacts (n=10, 4%). Conclusions: Findings from this study highlight how melanoma stakeholders discuss key concepts associated with the condition on social media, adding to the conceptual model of the patient journey. This social media listening approach is a powerful tool for exploring melanoma stakeholder perspectives, providing insights that can be used to corroborate existing data and inform future studies.

1 March 2012
Verified
Journal Article
Closed access
XPXeni Provatopoulou
Xeni Provatopoulou
EKEleni Kalogera
Eleni Kalogera
ASAlexandros Sagkriotis
Alexandros Sagkriotis
FZFlora Zagouri
Flora Zagouri
ANAphroditi Nonni
Aphroditi Nonni
AGAntonia Gounaris
Antonia Gounaris

10 November 2023 in JMIR Cancer
Verified
Journal Article
Open access
ZPZinaida Perić
Zinaida Perić
GBGrzegorz Wladyslaw Basak
Grzegorz Wladyslaw Basak
CKChristian Koenecke
Christian Koenecke
IMIvan Moiseev
Ivan Moiseev
JCJyoti Chauhan
Jyoti Chauhan
OPOlaf Penack
Olaf Penack
Background: Graft-versus-host disease (GVHD) is the major cause of short- and long-term morbidity and mortality after allogeneic hematopoietic stem cell transplantation. Treatment options beyond corticosteroid therapy remain limited, and prolonged treatment often leads to impaired quality of life (QoL). A better understanding of the needs and experiences of patients with GVHD is required to improve patient care. Objective: The aim of this study is to explore different social media (SM) channels for gathering and analyzing the needs and experiences of patients and other stakeholders across 14 European countries. Methods: We conducted a retrospective analysis of SM data from the public domain. The Talkwalker social analytics tool collected data from open-access forums, blogs, and various social networking sites using predefined search strings. The raw data set derived from the aggregator tool was automatically screened for the relevancy of posts, generating the curated data set that was manually reviewed to identify posts that fell within the predefined inclusion and exclusion criteria. This final data set was then used for the deep-dive analysis. Results: A total of 9016 posts relating to GVHD were identified between April 2019 and April 2021. Deduplication and relevancy checks resulted in 325 insightful posts, with Twitter contributing 250 (77%) posts; blogs, 49 (15%) posts; forums, 13 (4%) posts; Facebook, 7 (2%) posts; and Instagram and YouTube, 4 (1%) posts. Patients with GVHD were the primary stakeholders, contributing 63% of all SM posts. In 234 posts, treatment was the most discussed stage of the patient journey (68%), followed by symptoms (33%), and diagnosis and tests (21%). Among treatment-related posts (n=159), steroid therapy was most frequently reported (54/159, 34%). Posts relating to treatment features (n=110) identified efficacy (45/110, 41%), side effects (38/110, 35%), and frequency and dosage (32/110, 29%), as the most frequently discussed features. Symptoms associated with GVHD were described in 24% (77/325) of posts, including skin-related conditions (49/77, 64%), dry eyes or vision change (13/77, 17%), pain and cramps (16/77, 21%), and fatigue or muscle weakness (12/77, 16%). The impacts of GVHD on QoL were discussed in 51% (165/325) of all posts, with the emotional, physical and functional, social, and financial impacts mentioned in 69% (114/165), 50% (82/165), 5% (8/165), and 2% (3/165) of these posts, respectively. Unmet needs were reported by patients or caregivers in 24% (77/325) of analyzed conversations, with treatment-related side effects being the most common (35/77, 45%) among these posts. Conclusions: SM listening is a useful tool to identify medical needs. Treatment of GVHD, including treatment-related side effects, as well as its emotional and physical impact on QoL, are the major topics that GVHD stakeholders mention on SM. We encourage a structured discussion of these topics in interactions between health care providers and patients with GVHD. Trial Registration: Not applicable

8 December 2025 in Frontiers in Health Services
Verified
Journal Article
Open access
PDF file
ASAlexandros Sagkriotis
Alexandros Sagkriotis
Real-World Evidence (RWE) is a critical enabler of personalized medicine (PM), offering granular insights into how interventions perform across diverse, real-life populations. This manuscript, grounded in over 30 years of health data science and regulatory experience, explores the evolving role of RWE in transforming healthcare delivery—from regulatory frameworks and policy alignment to artificial intelligence (AI)-enabled patient stratification. Through real-world case examples in oncology, ophthalmology, and dermatology, the article illustrates how digital tools and data integration can enhance patient-centred care. Each vignette concludes with an “adoption path” outlining data requirements, minimal IT changes, training, and payer-relevant endpoints. The discussion critically examines risks—such as bias, opacity in algorithms, and lack of harmonization—and translates them into a pre-deployment audit checklist and an equity checklist for subgroup performance and representativeness audits. To guide global regulatory practice, a “regulatory pragmatics” checklist is proposed, covering data quality, traceability, validation, transparency, and patient voice, including patient-generated health data (PGHD). Building on the Healthcare 5.0 vision, the manuscript aligns RWE with human-centric, sustainable, and resilient pillars, highlighting IoT wearables, environmental sensors, and continuous lifestyle data streams. Policy and implementation recommendations, together with a global convergence roadmap, position RWE as a strategic tool for regulators, payers, and clinicians. The paper concludes with a call for systemic accountability: industry must innovate responsibly, regulators must approve with foresight, payers must assess tools beyond medications, and health systems must bridge infrastructure gaps. Over the next 12–24 months, measurable commitments are required across all stakeholders to ensure that PM becomes everyday care. PM must serve patients—not just science, policy, or business—and that demands leadership grounded in scientific integrity and human empathy.