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16 pages, 869 KB  
Article
A Retrospective Cohort Study to Determine COVID-19 Mortality, Survival Probability and Risk Factors Among Children in a South African Province
by Asongwe Lionel Ateh Tantoh, Makhutsisa Charlotte Mokoatle and Thokozani P. Mbonane
COVID 2026, 6(1), 20; https://doi.org/10.3390/covid6010020 (registering DOI) - 18 Jan 2026
Abstract
Numerous factors contributed to coronavirus 2019 (COVID-19) disease recovery and death rates. In many countries, socioeconomics, morbidities, the experience of symptoms and access to healthcare services are major contributors to recovery and death rates. A retrospective cohort study was conducted to determine the [...] Read more.
Numerous factors contributed to coronavirus 2019 (COVID-19) disease recovery and death rates. In many countries, socioeconomics, morbidities, the experience of symptoms and access to healthcare services are major contributors to recovery and death rates. A retrospective cohort study was conducted to determine the morbidity, mortality, survival probability, and risk factors associated with COVID-19 among children in the Free State province, South Africa. A total of 846 patients’ records were used in the study. Using SPSS version 28 software, survival probability was determined using Kaplan–Meier estimation curves and Cox regression was used to determine the effect of sociodemographics and clinical manifestation information on time of death. The COVID-19 mortality rate was 13.12% in our study. There were more female patients (60%) than male patients (40%). In total, 71 patients had two or more morbidities, while 414 patients were asymptomatic. Patients between 5 and 18 years old were at twice the risk of dying of COVID-19, and male children were at a higher risk as well. Having more than one symptom was also a risk for dying in this study. Severe COVID-19 is attributed to numerous factors, and these are closely associated with surrounding environments and public health systems. The findings are important for the clinical management of similar diseases and circumstances in the future. Full article
(This article belongs to the Special Issue Post-Acute Infection Syndromes: Lessons from Long COVID and Long Flu)
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10 pages, 462 KB  
Communication
The Impact of IgG Glycosylation in SARS-CoV-2 Infection vs. Vaccination: A Statistical Analysis
by Adriána Kutás, Attila Garami and Csaba Váradi
Int. J. Mol. Sci. 2026, 27(2), 946; https://doi.org/10.3390/ijms27020946 (registering DOI) - 18 Jan 2026
Abstract
This study investigates the glycosylation patterns of serum IgG antibodies in relation to COVID-19 infection and vaccination, highlighting the potential of specific glycan profiles as biomarkers for immune responses. Using Spearman correlation analysis, distinct associations among glycan levels and various clinical laboratory parameters [...] Read more.
This study investigates the glycosylation patterns of serum IgG antibodies in relation to COVID-19 infection and vaccination, highlighting the potential of specific glycan profiles as biomarkers for immune responses. Using Spearman correlation analysis, distinct associations among glycan levels and various clinical laboratory parameters were identified, revealing complex, non-linear interactions that influence immune dynamics. Significant differences were observed in sialylated glycan profiles across patient groups, indicating that vaccination and natural infection elicit unique immune mechanisms and suggesting that vaccination induces favorable glycosylation changes. Notably, high-mannose glycans were found to correlate with other glycan types, underscoring their critical role in the immune response and suggesting their potential as biomarkers to differentiate between infection- and vaccination-induced immunity. The findings suggest that understanding these glycosylation dynamics may enhance diagnostic and therapeutic strategies, providing valuable tools for differentiating between immune responses elicited by infection and vaccination. Overall, this study contributes to the understanding of glycosylation’s impact on immune function in the context of COVID-19, emphasizing the importance of specific glycan markers, such as sialylated and high-mannose structures, in clinical applications. Full article
(This article belongs to the Special Issue COVID-19: Molecular Research and Novel Therapy)
13 pages, 236 KB  
Article
Investigating Pediatric Musculoskeletal and Head Injuries During the COVID-19 Pandemic in Manitoba
by Monther Abuhantash, Luca Ramelli, Ashley Stewart-Tufescu, Tamara Taillieu, Isuru Dharmasena, Ian Laxdal, James McCammon and Tracie O. Afifi
COVID 2026, 6(1), 19; https://doi.org/10.3390/covid6010019 (registering DOI) - 17 Jan 2026
Abstract
There is a paucity of evidence informing our understanding of how the COVID-19 pandemic affected pediatric trauma in Manitoba, Canada. The aim of this retrospective cohort study was to analyze the effect of the pandemic on pediatric trauma and its association with patients’ [...] Read more.
There is a paucity of evidence informing our understanding of how the COVID-19 pandemic affected pediatric trauma in Manitoba, Canada. The aim of this retrospective cohort study was to analyze the effect of the pandemic on pediatric trauma and its association with patients’ demographic characteristics. Pre-pandemic and pandemic patient cohorts were created, and the rates of these injuries were compared by patients’ sex, age, and area of residence. During the pre-pandemic period, ED presentations with an MSK or head injury were lower in patients from rural communities compared to urban communities (RR: 0.68, p < 0.001, RR: 0.51, p < 0.001). Hospitalizations with an MSK or head injury were higher in patients from rural communities (RR: 1.78, p < 0.001, RR: 1.14, p = 0.62). During the pandemic, MSK injury ED presentations (RR: 1.14, p = 0.037) and hospitalizations (RR: 1.78, p < 0.001) were higher in patients from rural communities. Patients from rural communities had a lower rate of head injury ED presentations (RR: 0.81, p < 0.001), but higher hospitalization rate (RR:1.96, p = 0.001). Differences in the rates of pediatric MSK and head injuries could be attributed to the limited healthcare resources in underserved rural communities. Efforts should be made to rectify these inequities to ensure fair access to healthcare for these patients. Full article
(This article belongs to the Section COVID Public Health and Epidemiology)
12 pages, 471 KB  
Article
The Impact of the COVID-19 Pandemic on the Clinical Course of Influenza in Hospitalised Children in the Years 2017–2025
by Zuzanna Wasielewska, Justyna Franczak, Krystyna Dobrowolska, Justyna Moppert, Małgorzata Sobolewska-Pilarczyk and Małgorzata Pawłowska
Life 2026, 16(1), 154; https://doi.org/10.3390/life16010154 (registering DOI) - 17 Jan 2026
Abstract
Background: The COVID-19 pandemic substantially altered the epidemiology of respiratory infections. Its impact on the clinical course of influenza in hospitalised children remains insufficiently characterised. Objectives: We aimed to compare the clinical course, complications, and selected laboratory parameters of influenza in children before, [...] Read more.
Background: The COVID-19 pandemic substantially altered the epidemiology of respiratory infections. Its impact on the clinical course of influenza in hospitalised children remains insufficiently characterised. Objectives: We aimed to compare the clinical course, complications, and selected laboratory parameters of influenza in children before, during, and after the COVID-19 pandemic. Methods: This single-centre retrospective study included 553 children hospitalised with laboratory-confirmed influenza between September 2017 and August 2025. Patients were divided into three groups: pre-pandemic, pandemic, and post-pandemic. Clinical complications and inflammatory markers (CRP, PCT, neutrophil counts) were analysed. Results: Influenza-related complications occurred in 59.5% of patients and were significantly more frequent after the pandemic compared to the pre-pandemic period (64.3% vs. 52.9%, p = 0.02). Pneumonia was the most common complication across all groups, but its incidence was lowest during the pandemic. Myositis occurred most frequently during the pandemic and appears to coincide with a higher proportion of influenza B infections. No significant differences were observed in CRP, PCT concentrations, or neutropenia rates between groups. Conclusions: The COVID-19 pandemic influenced the clinical presentation of influenza in children, with a post-pandemic increase in complications. These findings may reflect delayed access to healthcare and the phenomenon of immunity debt, highlighting the need for continued surveillance and preventive strategies. Full article
(This article belongs to the Section Medical Research)
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34 pages, 3921 KB  
Review
Nanobiosensors: A Potential Tool to Decipher the Nexus Between SARS-CoV-2 Infection and Gut Dysbiosis
by Atul Kumar Tiwari, Munesh Kumar Gupta, Siddhartha Kumar Mishra, Ramovatar Meena, Fernando Patolsky and Roger J. Narayan
Sensors 2026, 26(2), 616; https://doi.org/10.3390/s26020616 - 16 Jan 2026
Viewed by 31
Abstract
The emergence of SARS-CoV-2 posed a great global threat and emphasized the urgent need for diagnostic tools that are rapid, reliable, sensitive and capable of real-time monitoring of SARS-CoV-2 infections. Recent investigations have identified a potential connection between SARS-CoV-2 infection and gut dysbiosis, [...] Read more.
The emergence of SARS-CoV-2 posed a great global threat and emphasized the urgent need for diagnostic tools that are rapid, reliable, sensitive and capable of real-time monitoring of SARS-CoV-2 infections. Recent investigations have identified a potential connection between SARS-CoV-2 infection and gut dysbiosis, highlighting the sophisticated interplay between the virus and the host microbiome. This review article discusses the eminence of nanobiosensors, as state-of-the-art tools, to investigate and clarify the connection between SARS-CoV-2 pathogenesis and gut microbiome imbalance. Nanobiosensors are uniquely advantageous owing to their sensitivity, selectivity, specificity, and reliable monitoring capabilities, making them well-suited for identifying both viral particles and microbial markers in biological samples. We explored a range of nanobiosensor platforms and their potential use for concurrently monitoring the gut dysbiosis induced by different pathological conditions. Additionally, we explore how advanced sensing technologies can shed light on the mechanisms driving virus-induced dysbiosis, and the implications for disease progression and patient outcomes. The integration of nanobiosensors with microfluidic devices and artificial intelligence algorithms has also been explored, highlighting the potential of developing point-of-care diagnostic tools that provide comprehensive insights into both viral infection and gut health. Utilizing nanotechnology, scientists and healthcare professionals may gain a more profound insight into the complex interaction dynamics between SARS-CoV-2 infection and the gut microenvironment. This could pave the way for enhanced diagnostic and prognostic approaches, treatment courses, and patient care for COVID-19. Full article
(This article belongs to the Special Issue Feature Review Papers in the Biomedical Sensors Section)
16 pages, 1942 KB  
Article
Genetic Diversity of the Non-Polio Enteroviruses Detected in Samples of Patients with Aseptic Meningitis in the Ural Federal District and Western Siberia
by Tarek M. Itani, Vladislav I. Chalapa, Anastasia K. Patrusheva, Evgeniy S. Kuznetsov and Aleksandr V. Semenov
Viruses 2026, 18(1), 121; https://doi.org/10.3390/v18010121 - 16 Jan 2026
Viewed by 37
Abstract
Human non-polio enteroviruses (NPEVs) cause a plethora of infections in humans, ranging from mild to severe neurological diseases including aseptic meningitis. NPEVs are the leading cause of aseptic meningitis in both children and adults worldwide. In Russia, reports of NPEV infections have surged, [...] Read more.
Human non-polio enteroviruses (NPEVs) cause a plethora of infections in humans, ranging from mild to severe neurological diseases including aseptic meningitis. NPEVs are the leading cause of aseptic meningitis in both children and adults worldwide. In Russia, reports of NPEV infections have surged, especially in the post-COVID era starting in 2022, with elevated infection rates into 2023. A comprehensive examination of the whole genome is crucial for understanding the evolution of NPEV genes and for predicting potential outbreaks. This study focused on identifying the circulating NPEV strains in the Ural Federal District and Western Siberia, using Sanger sequencing and next-generation sequencing (NGS) methodologies. Biological samples were collected from (n = 225) patients diagnosed with aseptic meningitis. Bioinformatics analysis targeted the nucleotide sequences of the major capsid protein (partial VP1) gene fragment, and the assembly of whole NPEV genomes. A total of 159 NPEVs were characterized, representing 70.7% of the collected samples. The main capsid variants forming the predominant genotypic profile included E30 (n = 39, 24.3%), E6 (n = 31, 19.3%), and CVA9 (n = 25, 15.6%). Using NGS, we successfully assembled 13 whole genomes for E6, E30, EV-B80, CVA9, CVB5, E11, and EV-A71 and 3 partial genomes for E6 and EV-B87. This molecular-genetic analysis provides contemporary insights into the genotypic composition, circulation patterns, and evolutionary dynamics of the dominant NPEV associated with aseptic meningitis in the Ural Federal District and Western Siberia. The laboratory-based monitoring and epidemiological surveillance for genetic changes and evolutionary studies are important for improving prevention and healthcare. Full article
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24 pages, 334 KB  
Article
The Impact of Compassion Fatigue on the Psychological Well-Being of Nurses Caring for Patients with Dementia: A Cross-Sectional Post-COVID-19 Data Analysis
by Maria Topi, Paraskevi Tsioufi, Evangelos C. Fradelos, Foteini Malli, Evmorfia Koukia and Polyxeni Mangoulia
Healthcare 2026, 14(2), 224; https://doi.org/10.3390/healthcare14020224 - 16 Jan 2026
Viewed by 36
Abstract
Background/Objectives: Nurses are susceptible to compassion fatigue due to the nature of their professional responsibilities. Factors contributing to this vulnerability include daily patient interactions and organizational elements within their work environment, as well as work-related stress and sociodemographic characteristics, including age, marital status, [...] Read more.
Background/Objectives: Nurses are susceptible to compassion fatigue due to the nature of their professional responsibilities. Factors contributing to this vulnerability include daily patient interactions and organizational elements within their work environment, as well as work-related stress and sociodemographic characteristics, including age, marital status, years of professional experience, and, notably, gender. This research investigates the relationship between compassion fatigue and the levels of anxiety and depression, as well as the professional quality of life among nurses providing care to dementia patients in Greece. Methods: A cross-sectional survey was carried out with 115 nurses working in dementia care centers in Greece. The Hospital Anxiety and Depression Scale (HADS), the Professional Quality of Life Scale (ProQOL-5), and the participants’ personal, demographic, and professional information were all included in an electronic questionnaire. Multiple regression analysis was used. Results: A total of 42.6% of nurses rated their working environment as favorable. Additionally, 23.5% of the sample exhibited high levels of compassion satisfaction, whereas 46.1% demonstrated low levels of burnout. Female gender (p = 0.022) and a higher family income (p = 0.046) was positively associated with compassion satisfaction. Regression analysis indicated that elevated symptoms of anxiety and depression were found to correlate with decreased compassion satisfaction, increased burnout, and heightened secondary post-traumatic stress. Conclusions: Engaging in the care of patients with dementia, particularly throughout the pandemic period, has underscored a pronounced susceptibility to compassion fatigue, physical fatigue, pain, psychological stress, and a reduced quality of life. These results highlight the importance for nursing management to adopt specific organizational measures, including proper staffing levels, balancing workloads, and conducting routine mental health assessments. Full article
(This article belongs to the Section Healthcare Quality, Patient Safety, and Self-care Management)
22 pages, 9994 KB  
Article
Clinical Manifestations of Subjects with Long COVID and Their Associations with Drug Use: The BioICOPER Study
by Silvia Arroyo-Romero, Leticia Gomez-Sanchez, Nuria Suarez-Moreno, Alicia Navarro-Caceres, Andrea Dominguez-Martin, Cristina Lugones-Sanchez, Susana Gonzalez-Sanchez, Marta Gomez-Sanchez, Emiliano Rodriguez-Sanchez, Luis Garcia-Ortiz, Elena Navarro-Matias and Manuel A. Gomez-Marcos
Biomedicines 2026, 14(1), 192; https://doi.org/10.3390/biomedicines14010192 - 15 Jan 2026
Viewed by 199
Abstract
Background/Objectives: Long COVID (LC) is associated with more than 200 symptoms. This study aimed to evaluate the correlation between symptoms clusters and pharmacological treatment in patients with LC and to explore differences by sex. Methods: We conducted a cross-sectional descriptive study [...] Read more.
Background/Objectives: Long COVID (LC) is associated with more than 200 symptoms. This study aimed to evaluate the correlation between symptoms clusters and pharmacological treatment in patients with LC and to explore differences by sex. Methods: We conducted a cross-sectional descriptive study including 304 participants diagnosed with LC according to the World Health Organization criteria. Symptoms during the acute phase, at the time of diagnosis of LC, and those persisting across both phases were collected by anamnesis. Symptoms were grouped into six clusters: systemic, neurocognitive, respiratory/cardiovascular, musculoskeletal, neurological/neuromuscular, and psychological/psychiatric. Drug use was assessed through a questionnaire verified by the medical records, including the consumption of cardiovascular drugs, antidepressants/anxiolytics, and anti-inflammatory/analgesics. Results: Patients reported a mean of 5.23 ± 1.10 symptoms in the acute phase, 4.20 ± 1.70 at LC diagnosis, and 3.83 ± 1.80 persisting across both phases. The most consumed pharmacological group was cardiovascular drugs (43.3%), followed by antidepressants/anxiolytics (34.8%). Psychotropic drugs and anti-inflammatory/analgesic drugs showed a positive association with all symptomatic groups (p < 0.05). Cardiovascular drugs showed a positive association with cardiorespiratory (β = 0.19, p < 0.05), neuromuscular (β = 0.11, p < 0.05), and psychological (β = 0.14, p < 0.05) symptoms. Conclusions: Psychotropic and anti-inflammatory/analgesic drugs were positively associated with all symptom clusters, while cardiovascular drugs were associated only with cardiorespiratory, neuromuscular, and psychological symptoms, highlighting the relevance of better characterization of treatment patterns in this population. Full article
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16 pages, 1794 KB  
Article
Impact of COVID-19 on Respiratory Function: A Post-Recovery Comparative Assessment
by Daniela Robu Popa, Corina Marginean, Mona Elisabeta Dobrin, Radu Adrian Crisan Dabija, Oana-Elena Melinte, Stefan Dumitrache-Rujinski, Ioan Emanuel Stavarache, Ionel-Bogdan Cioroiu and Antigona Carmen Trofor
J. Clin. Med. 2026, 15(2), 717; https://doi.org/10.3390/jcm15020717 - 15 Jan 2026
Viewed by 294
Abstract
Background: Post-COVID-19 syndrome (PCS) is defined as the persistence or development of new symptoms 3 months after the initial infection with the SARS-CoV-2 virus, these clinical aspects being most often associated with functional respiratory changes, as well as imagistic modifications. This study [...] Read more.
Background: Post-COVID-19 syndrome (PCS) is defined as the persistence or development of new symptoms 3 months after the initial infection with the SARS-CoV-2 virus, these clinical aspects being most often associated with functional respiratory changes, as well as imagistic modifications. This study aimed to evaluate longitudinal changes in pulmonary function among patients with PCS, in relation to the severity of the acute COVID-19 episode and the time elapsed since infection. Methods: A retrospective, observational study was conducted at the Clinical Hospital of Pulmonary Diseases Iași, Romania, between January 2021 and December 2022, including 97 adult patients with confirmed PCS. Demographic, clinical, and functional data were collected from medical records. Pulmonary function tests (PFTs) were performed according to ATS/ERS standards, assessing Forced Vital Capacity (FVC), Forced Expiratory Volume in the First Second (FEV1), FEV1/FVC ratio (Tiffeneau Index), Maximal Expiratory Flow at 50% and 25% of FVC (MEF50, MEF25), Diffusing Capacity of the Lung for Carbon Monoxide (adjusted for haemoglobin) (DLCO), Carbon Monoxide Transfer Coefficient (KCO), Alveolar Volume (AV), Total Lung Capacity (TLC) and Residual Volume (RV). Patients were grouped by time elapsed since infection (1–3, 4–7, 9–12, and up to 22 months). Statistical analyses included the Mann–Whitney U test, Spearman’s correlation, ROC curve analysis, and Principal Component Analysis (PCA). Results: A progressive improvement in FVC was observed up to 9–18 months post-infection (p < 0.05), while FEV1 remained stable, suggesting a predominantly restrictive ventilatory pattern. Patients with moderate acute COVID-19 presented significantly lower FVC%, FEV1%, DLCO%, and KCO% values compared with those with mild disease (p < 0.05). Diffusion abnormalities (DLCO and KCO) persisted beyond 12 months, indicating lasting alveolar-capillary impairment. ROC analysis identified TLC (AUC = 0.857), AV (AUC = 0.855), and KCO (AUC = 0.805) as the most discriminative parameters for residual dysfunction. PCA revealed three major functional domains—airflow limitation, diffusion capacity, and lung volume—explaining up to 70% of total variance. Conclusions: We are facing the emergence of a new phenomenon, namely a secondary post-COVID-19 pandemic of patients confronting with persistent post-COVID-19 symptoms who present with functional respiratory changes and who require careful monitoring in dynamics, personalized treatments and a multidisciplinary approach. Full article
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16 pages, 371 KB  
Article
Under-Detection of Depressive Symptoms in Older Ambulatory Patients with Post-COVID Syndrome
by Natalya Rakhalskaya, Nurlan Jainakbayev, Maria Kostousova, Timur Tastaibek, Almagul Mansharipova and Saida Yeshimbetova
Psychiatry Int. 2026, 7(1), 21; https://doi.org/10.3390/psychiatryint7010021 - 15 Jan 2026
Viewed by 67
Abstract
Background: Depressive symptoms are frequent sequelae of COVID-19 and may remain unrecognized in older outpatients, particularly those with post-COVID syndrome. The objective of the current study was to assess the under-detection of depressive symptoms in older ambulatory patients and to examine its relationship [...] Read more.
Background: Depressive symptoms are frequent sequelae of COVID-19 and may remain unrecognized in older outpatients, particularly those with post-COVID syndrome. The objective of the current study was to assess the under-detection of depressive symptoms in older ambulatory patients and to examine its relationship with post-COVID syndrome status. Methods: We conducted an observational outpatient cohort study of adults aged 60–89 years with prior SARS-CoV-2 infection (N = 85), recruited at two city polyclinics. Depressive symptoms were assessed through three detection channels: spontaneous complaint during the visit, a standardized direct question about current depressive symptoms, and the 15-item Geriatric Depression Scale (GDS-15). Agreement between complaint and direct question was evaluated using Cohen’s κ and McNemar’s test. Screening performance of complaint and direct question was assessed against GDS-15 thresholds (≥5; sensitivity analysis ≥ 6). Associations between post-COVID syndrome status and binary depressive-symptom indicators were expressed as risk ratios (RRs). Results: Spontaneous complaints missed a substantial proportion of cases: among complaint-negative patients, 18.3% (15/82) reported depressive symptoms on the direct question (κ = 0.149; McNemar p = 0.00052). Against GDS-15 ≥ 5, complaint sensitivity was 10.3% with specificity 100.0% (F1 = 0.19), whereas the direct question showed higher sensitivity (34.5%) with specificity 87.5% (F1 = 0.43). Using the alternative threshold GDS-15 ≥ 6, complaint sensitivity was 15.0% with specificity 100.0% (F1 = 0.26), and direct question sensitivity was 45.0% with specificity 87.7% (F1 = 0.49). A positive response to the direct question was more frequent in patients with post-COVID syndrome than in controls (RR = 2.70 (1.04–7.00)); stratified estimates suggested higher RRs in patients ≤ 75 years (RR = 4.55 (1.08–19.10)) and in women (RR = 2.67 (1.04–6.83)), with limited precision due to sparse events. Conclusions: In older post-COVID outpatients, reliance on spontaneous complaints leads to marked under-detection of GDS-15 screen-positive depressive symptoms. A standardized direct question improves initial case-finding but does not replace a validated screening scale; a stepped approach (brief direct question followed by a scale when indicated) may be warranted. Full article
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13 pages, 861 KB  
Article
Mid-Term Results of the Multicenter CAMPARI Registry Using the E-Liac Iliac Branch Device for Aorto-Iliac Aneurysms
by Francesca Noce, Giulio Accarino, Domenico Angiletta, Luca del Guercio, Sergio Zacà, Mafalda Massara, Pietro Volpe, Antonio Peluso, Loris Flora, Raffaele Serra and Umberto Marcello Bracale
J. Cardiovasc. Dev. Dis. 2026, 13(1), 48; https://doi.org/10.3390/jcdd13010048 - 15 Jan 2026
Viewed by 87
Abstract
Background: Intentional occlusion of the internal iliac artery (IIA) during endovascular repair of aorto-iliac aneurysms may predispose patients to pelvic ischemic complications such as gluteal claudication, erectile dysfunction, and bowel ischemia. Iliac branch devices (IBDs) have been developed to preserve hypogastric perfusion. [...] Read more.
Background: Intentional occlusion of the internal iliac artery (IIA) during endovascular repair of aorto-iliac aneurysms may predispose patients to pelvic ischemic complications such as gluteal claudication, erectile dysfunction, and bowel ischemia. Iliac branch devices (IBDs) have been developed to preserve hypogastric perfusion. E-Liac (Artivion/Jotec) is one of the latest modular IBDs yet reports on mid-term performance are limited to small single-center cohorts with short follow-up. The CAMpania PugliA bRanch IliaC (CAMPARI) study is a multicenter investigation of E-Liac outcomes. Methods: A retrospective observational cohort study was conducted across five Italian vascular centers. All consecutive patients undergoing E-Liac implantation for aorto-iliac or isolated iliac aneurysms between January 2015 and December 2024 were identified from prospectively maintained registries. Inclusion criteria comprised elective or urgent endovascular repair of aorto-iliac aneurysms in which an adequate distal sealing zone was not available without covering the IIA and suitability for the E-Liac device according to its instructions for use (IFU). Patients with a life expectancy < 1 year or hostile anatomy incompatible with the IFU were excluded. The primary end point was freedom from branch instability (occlusion/stenosis, kinking, or detachment of the bridging stent). Secondary end points included freedom from any endoleak, freedom from device-related reintervention, freedom from gluteal claudication, aneurysm-related and all-cause mortality, acute renal failure, and sac regression > 5 mm. Results: A total of 69 consecutive patients (68 male, 1 female, median age 72.0 years) received 74 E-Liac devices, including 5 bilateral implantations. The mean infrarenal aortic diameter was 45 mm and the mean CIA diameter 34 mm; 14 patients (20.0%) had a concomitant IIA aneurysm (>20 mm). Concomitant fenestrated or branched aortic repair was performed in 23% of procedures. Two patients received a standalone IBD without implantation of a proximal aortic endograft. Technical success was achieved in 71/74 cases (96.0%); three failures occurred due to inability to catheterize the IIA. Distal landing was in the main IIA trunk in 58 cases and in the posterior branch in 13 cases. Over a median follow-up of 18 (6; 36) months, there were four branch instability events (5.4%): three occlusions and one bridging stent detachment. Seven patients (9.5%) developed endoleaks (one type Ib, two type II, two type IIIa, and two type IIIc). Five patients (6.8%) required reintervention, and five (6.8%) reported gluteal claudication. There were seven all-cause deaths (10%), none within 30 days or related to aneurysm rupture; causes included COVID-19 pneumonia, acute coronary syndrome, melanoma, gastric cancer, and stroke. No acute renal or respiratory failure occurred. Kaplan–Meier analysis showed 92% (95% CI 77–100) freedom from branch instability in the main-trunk group and 89% (60–100) in the posterior-branch group (log-rank p = 0.69). Freedom from any endoleak at 48 months was 87% (95% CI 75–95), and freedom from reintervention was 93% (95% CI 83–98). Conclusions: In this multicenter cohort, the E-Liac branched endograft demonstrated high technical success and favorable early–mid-term outcomes. Preservation of hypogastric perfusion using E-Liac was associated with low rates of branch instability, endoleak, and reintervention, with no 30-day mortality or aneurysm-related deaths. These findings support the safety and efficacy of E-Liac for aorto-iliac aneurysm management, although larger prospective studies with longer follow-up are needed. Full article
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23 pages, 3190 KB  
Article
Helminth Antigens Modulate Virus-Induced Activation of CD154 (CD40L) Expression on T Cells in Onchocerca volvulus-Infected Individuals
by Brice Armel Nembot Fogang, Kathrin Arndts, Tomabu Adjobimey, Michael Owusu, Vera Serwaa Opoku, Derrick Adu Mensah, John Boateng, Jubin Osei-Mensah, Julia Meyer, Ute Klarmann-Schulz, Sacha Horn, Inge Kroidl, Alexander Y. Debrah, Achim Hoerauf, Manuel Ritter and Linda B. Debrah
Pathogens 2026, 15(1), 93; https://doi.org/10.3390/pathogens15010093 - 15 Jan 2026
Viewed by 145
Abstract
Background: The interaction between helminth and viral infections has important implications for understanding viral disease outcomes and vaccine efficacy in helminth-endemic regions. We previously demonstrated that helminth seropositivity is associated with reduced Th1/Th17 cytokine levels and reduced COVID-19 severity; however, the underlying immunological [...] Read more.
Background: The interaction between helminth and viral infections has important implications for understanding viral disease outcomes and vaccine efficacy in helminth-endemic regions. We previously demonstrated that helminth seropositivity is associated with reduced Th1/Th17 cytokine levels and reduced COVID-19 severity; however, the underlying immunological mechanisms remain unclear. This study further investigated these mechanisms by assessing how helminth antigens influence SARS-CoV-2-induced T-cell responses in individuals infected with filarial parasites in vitro. Methods: Peripheral blood mononuclear cells (PBMCs) from 43 participants, including Onchocerca volvulus-infected individuals, filarial lymphedema patients, and non-endemic controls, were stimulated in vitro with SARS-CoV-2 peptides and Ascaris lumbricoides antigens. Results: Fluorescence-activated cell sorting analysis showed a significant reduction in SARS-CoV-2-induced CD154 expression on CD4+ T cells but an increase on CD8+ T cells in O. volvulus-infected participants (p < 0.0001). A. lumbricoides antigens alone did not induce significant T-cell activation in O. volvulus-infected individuals. However, SARS-CoV-2 peptides strongly activated CD4+CD154+ T cells response (p = 0.0074), but co-stimulation with A. lumbricoides antigens markedly reduced CD3+ and CD4+CD154+ T-cell expression frequencies (p = 0.0329 and p = 0.0452). A. lumbricoides-specific IgG correlated inversely with SARS-CoV-2-induced CD4+CD154+ expression (r = −0.6025, p = 0.0049), whereas SARS-CoV-2-specific IgG was positively associated with CD4+CD154+ and CD8+CD154+ T-cell responses (β = 0.532, p = 0.016 and β = 0.509, p = 0.022). Conclusion: These findings demonstrate that helminth antigens modulate functional SARS-CoV-2-induced T-cell responses, offering a potential mechanism through which helminth co-infections shape antiviral immunity, vaccine efficacy, and clinical disease outcomes. Full article
(This article belongs to the Special Issue Parasitic Helminths and Control Strategies)
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15 pages, 675 KB  
Article
Dysregulation of MMP-2 and MMP-9 in Post-COVID-19 and IPF: Correlations with Systemic Inflammation and Endothelial Dysfunction
by Olga V. Balan, Irina E. Malysheva, Ella L. Tikhonovich and Liudmila A. Lysenko
J. Clin. Med. 2026, 15(2), 671; https://doi.org/10.3390/jcm15020671 - 14 Jan 2026
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Abstract
Background/Objectives: Post-COVID-19 pulmonary fibrosis (PCPF) and idiopathic pulmonary fibrosis (IPF) exhibit significant clinical and pathophysiological overlap, suggesting convergent molecular pathways driving fibrosis. This prospective longitudinal study investigates the sustained dysregulation of matrix metalloproteinases (MMP)-2 and MMP-9 and its relationship with evolving systemic [...] Read more.
Background/Objectives: Post-COVID-19 pulmonary fibrosis (PCPF) and idiopathic pulmonary fibrosis (IPF) exhibit significant clinical and pathophysiological overlap, suggesting convergent molecular pathways driving fibrosis. This prospective longitudinal study investigates the sustained dysregulation of matrix metalloproteinases (MMP)-2 and MMP-9 and its relationship with evolving systemic inflammation and endothelial dysfunction in convalescent COVID-19 patients, with comparative analysis to IPF. Methods: We conducted a prospective observational study of 86 patients at 6 and 12 months post-SARS-CoV-2 infection, stratified by high-resolution CT evidence of PCPF (FB+ group, n = 32) or absence of fibrosis (FB− group, n = 54). Gene expression of MMP-2 and MMP-9 in peripheral blood leukocytes and circulating levels of MMP-2, MMP-9, pro-inflammatory cytokines (TNF-α, IL-6), and endothelial dysfunction markers (Endothelin-1 [ET-1], adhesion molecules) were quantified via qRT-PCR and ELISA. A pre-pandemic healthy control group (HD, n = 20) and an IPF patient group (n = 10) served as comparators. Results: A significant, sustained elevation of MMP-2 and MMP-9 was observed in all post-COVID-19 patients versus HDs, most pronounced in the FB+ group and qualitatively similar to IPF. A critical divergence emerged: FB− patients showed resolution of systemic inflammation (reduced TNF-α, IL-6), whereas FB+ patients exhibited persistent cytokine elevation. Critically, a delayed, severe endothelial dysfunction, characterized by a profound surge in ET-1 and elevated adhesion molecules, manifested exclusively in the FB+ cohort at 12 months. Positive correlations linked plasma MMP-2/9 levels with ET-1 (rs = 0.65, p = 0.004; rs = 0.49, p = 0.009) and ET-1 with sICAM-1 (rs = 0.68, p = 0.01). Conclusions: The development of PCPF is associated with a distinct pathogenic triad: sustained MMP dysregulation, failure to resolve inflammation, and severe late-phase endothelial dysfunction. The correlative links between these components suggest a self-reinforcing loop. This systemic signature mirrors patterns in IPF, underscoring shared final pathways in fibrotic lung disease and identifying the MMP–inflammation–endothelial axis as a promising target for biomarker development and therapeutic intervention. Full article
(This article belongs to the Special Issue Chronic Lung Conditions: Integrative Approaches to Long-Term Care)
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13 pages, 1990 KB  
Article
Possible Involvement of Hypothalamic Dysfunction in Long COVID Patients Characterized by Delayed Response to Gonadotropin-Releasing Hormone
by Yuki Otsuka, Yoshiaki Soejima, Yasuhiro Nakano, Atsuhito Suyama, Ryosuke Takase, Kohei Oguni, Yohei Masuda, Daisuke Omura, Yasue Sakurada, Yui Matsuda, Toru Hasegawa, Hiroyuki Honda, Kazuki Tokumasu, Keigo Ueda and Fumio Otsuka
Int. J. Mol. Sci. 2026, 27(2), 832; https://doi.org/10.3390/ijms27020832 - 14 Jan 2026
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Abstract
Long COVID (LC) may involve endocrine dysfunction; however, the underlying mechanism remains unclear. To examine hypothalamic–pituitary responses in patients with LC, we conducted a single-center retrospective study of patients with refractory LC referred to our University Hospital who underwent anterior pituitary stimulation tests. [...] Read more.
Long COVID (LC) may involve endocrine dysfunction; however, the underlying mechanism remains unclear. To examine hypothalamic–pituitary responses in patients with LC, we conducted a single-center retrospective study of patients with refractory LC referred to our University Hospital who underwent anterior pituitary stimulation tests. Between February 2021 and November 2025, 1251 patients with long COVID were evaluated, of whom 207 (19%) had relatively low random ACTH or cortisol levels. Ultimately, 16 underwent anterior pituitary stimulation tests and were included. All tests were performed in an inpatient setting without exogenous steroids. Fifteen patients (six women, mean age 35.6 years) underwent corticotropin-releasing hormone (CRH), thyrotropin-releasing hormone (TRH), and gonadotropin-releasing hormone (GnRH) tests. All patients had mild acute COVID-19, eight had ≥2 vaccinations, and the mean interval from infection was 343 days. Frequent symptoms included fatigue (100%), insomnia (66.7%), headache (60.0%), anorexia/nausea (40.0%), and brain fog (40.0%). Mean early-morning cortisol and 24 h urinary free cortisol were 7.5 μg/dL and 41.0 μg/day, respectively. MRI showed an empty sella in one case. Peak hormonal responses were preserved (ΔACTH 247%, ΔTSH 918%, ΔPRL 820%, ΔFSH 187%, ΔLH 1150%); however, peaks were delayed beyond 60 min in ACTH (13%), LH (33%), and FSH (87%). Notably, significantly delayed elevations remained at 120 min in the responses of TSH (4.1-fold), PRL (1.8-fold), LH (9.3-fold), and FSH (2.8-fold), suggesting possible hypothalamic involvement, particularly in the gonadotropin responses. Additionally, serum IGF-I was lowered (−0.70 SD), while GH response (mean peak 35.5 ng/mL) was preserved by growth hormone-releasing peptide (GHRP)-2 stimulation. Low-dose hydrocortisone and testosterone were initiated for three patients. Although direct viral effects and secondary suppression have been proposed, our findings may suggest that, at least in part, the observed response characteristics are consistent with functional secondary hypothalamic dysfunction rather than irreversible primary injury. These findings highlight the need for objective endocrine evaluation before initiating hormone replacements. Full article
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13 pages, 1003 KB  
Article
Evaluating the Utility and Implementation Barriers of a Liquid Biopsy Biomarker Test Early in the Lung Cancer Diagnostic Pathway to Improve Timeliness of Palliative Systemic Therapy
by Adi Kartolo, Laura Semenuk, Harriet Feilotter, Colleen Savage, Alexander Boag, Wilma Hopman, Geneviève Digby and Mihaela Mates
Curr. Oncol. 2026, 33(1), 42; https://doi.org/10.3390/curroncol33010042 - 13 Jan 2026
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Abstract
Purpose: Timeliness of systemic therapy initiation for advanced lung cancer is highly dependent on pathology and molecular pathology laboratory services. Here, we aimed to prospectively evaluate liquid biopsy as a potential strategy to expedite systemic therapy decision-making in lung cancer management. Patients and [...] Read more.
Purpose: Timeliness of systemic therapy initiation for advanced lung cancer is highly dependent on pathology and molecular pathology laboratory services. Here, we aimed to prospectively evaluate liquid biopsy as a potential strategy to expedite systemic therapy decision-making in lung cancer management. Patients and Methods: This prospective cohort study included consecutive patients with suspected lung cancer seen at the time of initial specialist consultation who underwent both liquid and solid tumour biopsy (group A) and patients with confirmed lung malignancy who underwent solid tumour biopsy alone (group B), between 1 February 2022 and 31 May 2023. Due to laboratory factors, liquid biopsies were processed in batches of 13, whereas solid tumour biopsies were processed individually upon receipt, as per standard practices. Co-primary endpoints included the time from solid versus liquid biopsies to biomarker reporting and palliative systemic therapy initiation. Results: A total of 324 patients were included in the study. The median time from date of blood draw to date of liquid biopsy result was 78 days. For group A (n = 50), the median time from date of solid tumour biopsy to biomarker reporting was 22 days, and the median time from date of solid tumour biopsy to palliative systemic therapy was 42 days. The median time from date of liquid biopsy blood draw to palliative systemic therapy initiation was 56 days. For group B (n = 274), the median times from date of biopsy to biomarker reporting and to palliative systemic therapy initiation in all patients were 22 and 47 days, respectively. Conclusions: While we did not demonstrate improvement in timeliness of biomarker reporting or systemic therapy initiation with liquid biopsy, several barriers leading to delay in liquid biopsy reporting were identified due to unexpected COVID-19-related supply chain disruption and the cost-limiting need to batch sample analysis. Further studies that address the identified barriers are warranted to assess the potential improvement in timeliness of care, should liquid biopsy analysis be implemented in real-time. Full article
(This article belongs to the Section Thoracic Oncology)
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