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1.
OTO Open ; 8(3): e166, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38974178

RESUMEN

Objective: To determine the effect of smoking history on the risk of developing obstructive eustachian tube dysfunction (OETD). Study Design: Cross-sectional review. Setting: National database. Methods: Data from the National Health and Nutrition Examination Survey (1999 to present) was analyzed. OETD was defined as middle ear pressure less than -100 decapascals (daPa). Nonsmokers, current smokers, with tympanometry data were analyzed. Patients under the age of 18, with myringotomy tubes, or with a sinus problem/earache/cold in the past 24 hours were excluded. The relative risks (RRs) for developing OETD were calculated for nonsmokers versus smokers and those with greater versus less than 10, 20, and 30 pack years (py). Results: A total of 9472 patients met inclusion criteria (54.1% female, 75.9% non-Hispanic, mean age 43, 20.3% smokers). The RR of having OETD for smokers versus nonsmokers was 1.75 [95% confidence interval, CI: 1.45-2.11]. The RR of having OETD for patients with a 10+ py was 1.97 [95% CI 1.57-2.47], 20+ py was 2.29 [95% CI 1.76-2.95], and 30 py or greater was 2.08 [95% CI 1.49-2.90]. Conclusion: In this study, smoking roughly doubled the risk of developing OETD, as represented by a single measurement of negative middle ear pressure less than -100 daPa. The definition of OETD used in this study was limited, as it did not include symptomology, and more work is needed to examine additional covariates. However, these results may guide future research to better counsel and screen patients for OETD.

2.
Artículo en Inglés | MEDLINE | ID: mdl-38939992

RESUMEN

This academic review examines the latest biotechnology methods for resveratrol synthesis. We aim to study the health advantages of resveratrol consumption beyond synthesis and demonstrate its potential as a therapeutic agent. An extensive examination of the current state of literature was performed, employing a diverse range of scholarly databases with the purpose of collating pertinent information and conducting in-depth research on the subject matter. The main goal was to find and assess research on resveratrol's health effects and the latest biotechnology methods for synthesizing it. This review paper discusses resveratrol synthesis methods, including their efficacy and current advances. The findings highlight the significant potential of biotechnological methods in improving both the synthesis of resveratrol and its beneficial effects on health. Our comprehensive analysis substantiates the importance of biotechnological methodologies in synthesizing resveratrol. The literature review highlights resveratrol's therapeutic properties, which have been scientifically approved for the prevention and treatment of various ailments, such as cardiovascular disease, metabolic illnesses, cancer, aging, and immunomodulation.

3.
Sultan Qaboos Univ Med J ; 24(2): 243-249, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38828248

RESUMEN

Objectives: This study aimed to evaluate the safety and efficacy of remogliflozin compared to vildagliptin as an add-on drug to metformin in type 2 diabetes mellitus (T2DM) treatment. Metformin is considered a first-line drug in T2DM. However, as the disease progresses with heightened insulin resistance and declining ß-cell function, the use of metformin alone is often inadequate to achieve optimum glucose levels. Methods: This prospective, randomised study was conducted at Maulana Azad Medical College and Associated Hospital in New Delhi, India, between February 2020 to January 2021. This study recruited 60 T2DM patients aged 35-70 years with glycated haemoglobin (HbA1c) >6.5% taking metformin at a daily dosage of 1,500-3,000 mg for ≥3 months. Patients were randomly assigned in a 1:1 ratio to receive either vildagliptin (50 mg) or remogliflozin (100 mg) twice daily for 90 days. The primary endpoint was a change in HbA1c levels from baseline to the end of 90 days whereas secondary endpoints were changes in lipid profile and weight. Results: The decrement in mean HbA1c levels was significantly higher in the remogliflozin group than in the vildagliptin group (-8.1% versus -2.4%; P <0.001). In addition, more significant weight loss was found in remogliflozin-treated patients (-5.2% versus -0.6%; P <0.01). Both treatments were well tolerated throughout the study. Conclusion: Compared to vildagliptin, remoglilflozin was significantly more effective in glycaemic control and weight loss in patients with T2DM and can therefore be considered as an add-on drug in T2DM not adequately controlled by metformin monotherapy.


Asunto(s)
Diabetes Mellitus Tipo 2 , Quimioterapia Combinada , Hipoglucemiantes , Metformina , Vildagliptina , Humanos , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/sangre , Vildagliptina/farmacología , Vildagliptina/uso terapéutico , Metformina/uso terapéutico , Metformina/farmacología , Persona de Mediana Edad , Masculino , Femenino , Hipoglucemiantes/uso terapéutico , Hipoglucemiantes/farmacología , Estudios Prospectivos , Anciano , Adulto , Quimioterapia Combinada/métodos , India , Hemoglobina Glucada/análisis , Hemoglobina Glucada/efectos de los fármacos , Glucósidos/uso terapéutico , Glucósidos/farmacología , Resultado del Tratamiento , Glucemia/análisis , Glucemia/efectos de los fármacos , Sorbitol/análogos & derivados , Sorbitol/uso terapéutico , Sorbitol/farmacología , Sorbitol/efectos adversos , Sorbitol/administración & dosificación , Pirazoles
4.
Artículo en Inglés | MEDLINE | ID: mdl-38840395

RESUMEN

OBJECTIVE: This review paper examines biotechnological methods for enhancing edible insects using enzymatic hydrolysis and fermentation. Evaluations involve improving functionality, analyzing consumer acceptability elements, guaranteeing safety and quality, negotiating regulatory frameworks, and suggesting field breakthroughs and applications. METHODS: Our method comprises a thorough literature analysis and academic database searches for edible insect enzymatic hydrolysis and fermentation investigations. Based on gaps in the literature, we investigate edible insect safety, consumer acceptability, and legal and regulatory issues. RESULTS: The results show biotechnological advances in enzymatic hydrolysis and fermentation for edible insect functioning. Sensory and cultural aspects affect consumer acceptability. To ensure edible insect product safety, hazards and pollutants are addressed. The legal analysis highlights compliance issues and possibilities. CONCLUSION: This review shows how enzymatic hydrolysis and fermentation improve edible insect functioning, safety, and nutrition. The review includes consumer acceptability dynamics, legal issues, and safety analysis.

5.
Artículo en Inglés | MEDLINE | ID: mdl-38778590

RESUMEN

This review aims to examine the hydrogel structure concisely, approaches to hydrogel synthesis, and the most recent progressions in hydrogel technology along with its multifaceted applications within the domain of biomedicine, emphasizing its capacity to transform the delivery of drugs, tissue engineering, and diagnostics. This review employs an organized search of the literature to gather and evaluate state-of-the-art examines on hydrogel uses for biomedicine, synthesizing significant developments and breakthroughs to provide a holistic comprehension of their developing role and possible impact. The review's findings emphasize the revolutionary potential of recent advances in hydrogel uses within biomedicine, which includes improved drug delivery, cutting-edge tissue engineering, and recognized diagnostics. In summary, this scholarly article explores the intricacies of hydrogel structure, methodologies for hydrogel synthesis, and notable breakthroughs in the biomedical utilization of hydrogels. Given the extraordinary potential of hydrogels to transform diagnostic and therapeutic methodologies, this article emphasizes the growing significance of hydrogels in biomedicine and the critical need for further investigation into this subject matter. Consequently, hydrogels can pave the way for enhanced healthcare standards.

6.
Artículo en Inglés | MEDLINE | ID: mdl-38803172

RESUMEN

This comprehensive review of Spirulina encompasses biotechnology, phycocyanin production, and purification. Bioactive compounds and vital nutrients are investigated during the study. The literature examines the potential therapeutic advantages and clinical applications of Spirulina. This analysis assesses Spirulina consumption and its associated health risks. The current review offers a comprehensive synthesis of the therapeutic applications as well as technologies utilized for the extraction and purification of phycocyanin. Moreover, this discourse delves into the examination of various advantageous techniques for extracting and purifying phycocyanin, encompassing physical, chemical, and enzymatic methods. The data derived from a multitude of studies strongly indicate the potential therapeutic applications of phycocyanin, encompassing its notable attributes as an antioxidant, anti-inflammatory agent, anticancer agent, antiviral agent, antimicrobial agent, antiallergic agent, anti-obesity agent, antihypertensive agent, and an immunological agent.

7.
Artículo en Inglés | MEDLINE | ID: mdl-38803171

RESUMEN

This study investigates whether edible insects may be used as a sustainable protein source. This study covers insect proteins, their defatting process and extraction, health advantages, economic and environmental impacts, safety considerations, and regulatory aspects. This review also investigates the ecological benefits of insect farming and consumer acceptance of this dietary trend. A systematic search of the pertinent literature was conductedto collect data for this review. Current research examines the effects of using edible insects as functional, sustainable reservoirs of proteins, including protein screening, extraction methods, health benefits, and social recognition. The varied isolation techniques considerably affect protein amount and quality. . This review clarifies the broad spectrum of proteins in edible insects, particularly their nutritional importance and effective extraction methods. The viability of insects as a sustainable source of protein is highlighted by the safety considerations and the interaction of economic and ecological considerations with complex consumer characteristics.

8.
Iran J Basic Med Sci ; 27(5): 535-542, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38629090

RESUMEN

Atherosclerosis is a primary cause of illness and death globally and its mechanism is still unclear. Different animal models have been created to evaluate the progression of atherosclerosis, allowing researchers to carefully control the circumstances of the experiment as well as the nutrition and environmental risk factors. To investigate the negative effects of various interventions, pathophysiological alterations might be generated utilizing genetic or pharmacological methods. These models' molecular and pathophysiological mechanisms have been clarified through experiments, and they have served as platforms for the creation of new drugs. Different models can be employed to address various research problems, each with its own benefits and drawbacks. In the current review study, various species of atherosclerosis models are discussed, along with the viability of using them in experiments.

9.
Cell Rep ; 43(3): 113935, 2024 Mar 26.
Artículo en Inglés | MEDLINE | ID: mdl-38460129

RESUMEN

Autophagy and ribonucleoprotein granules, such as P-bodies (PBs) and stress granules, represent vital stress responses to maintain cellular homeostasis. SQSTM1/p62 phase-separated droplets are known to play critical roles in selective autophagy; however, it is unknown whether p62 can exist as another form in addition to its autophagic droplets. Here, we found that, under stress conditions, including proteotoxicity, endotoxicity, and oxidation, autophagic p62 droplets are transformed to a type of enlarged PBs, termed p62-dependent P-bodies (pd-PBs). p62 phase separation is essential for the nucleation of pd-PBs. Mechanistically, pd-PBs are triggered by enhanced p62 droplet formation upon stress stimulation through the interactions between p62 and DDX6, a DEAD-box ATPase. Functionally, pd-PBs recruit the NLRP3 inflammasome adaptor ASC to assemble the NLRP3 inflammasome and induce inflammation-associated cytotoxicity. Our study shows that p62 droplet-to-PB transformation acts as a stress response to activate the NLRP3 inflammasome process, suggesting that persistent pd-PBs lead to NLRP3-dependent inflammation toxicity.


Asunto(s)
Inflamasomas , Proteína con Dominio Pirina 3 de la Familia NLR , Humanos , Inflamasomas/metabolismo , Proteína con Dominio Pirina 3 de la Familia NLR/metabolismo , Proteína Sequestosoma-1 , Cuerpos de Procesamiento , Inflamación , Autofagia/fisiología
10.
Med Chem ; 20(4): 369-384, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38192143

RESUMEN

The worldwide impact of cancer is further compounded by the constraints of current anticancer medications, which frequently exhibit a lack of selectivity, raise safety apprehensions, result in significant adverse reactions, and encounter resistance mechanisms. The current situation highlights the pressing need to develop novel and more precise anticancer agents that prioritize safety and target specificity. Remarkably, more than 85% of drugs with physiological activity contain heterocyclic structures or at least one heteroatom. Nitrogen-containing heterocycles hold a significant position among these compounds, emerging as the most prevalent framework within the realm of heterocyclic chemistry. This article explores the medicinal chemistry behind these molecules, highlighting their potential as game-changing possibilities for anticancer medication development. The analysis highlights the inherent structural variety in nitrogen-containing heterocycles, revealing their potential to be customized for creating personalized anticancer medications. It also emphasizes the importance of computational techniques and studies on the relationships between structure and activity, providing a road map for rational medication design and optimization. Nitrogen- containing heterocycles are a promising new area of study in the fight against cancer, and this review summarises the state of the field so far. By utilizing their inherent characteristics and exploiting cooperative scientific investigations, these heterocyclic substances exhibit potential at the forefront of pioneering therapeutic approaches in combating the multifaceted obstacles posed by cancer.


Asunto(s)
Antineoplásicos , Descubrimiento de Drogas , Compuestos Heterocíclicos , Nitrógeno , Antineoplásicos/química , Antineoplásicos/farmacología , Antineoplásicos/síntesis química , Compuestos Heterocíclicos/química , Compuestos Heterocíclicos/farmacología , Compuestos Heterocíclicos/síntesis química , Humanos , Nitrógeno/química , Neoplasias/tratamiento farmacológico , Relación Estructura-Actividad , Estructura Molecular , Animales
11.
Med Chem ; 20(5): 487-502, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38279757

RESUMEN

This study aims to provide a thorough analysis of nitrogen-containing heterocycles, focusing on their therapeutic implications for the development of targeted and effective antiviral drugs. To better understand how nitrogen-containing heterocycles can be used to create antiviral drugs, this review adopts a systematic literature review strategy to compile and analyze pertinent research studies. It combines information from various fields to understand better the compounds' mode of action and their therapeutic potential. This review paper summarizes data from multiple sources to highlight the promising potential of heterocycles containing nitrogen as promising possibilities for future antiviral treatments. The capacity to engage selectively and modulate critical pathways bodes well for their use in developing new viral therapies. In conclusion, nitrogen-containing heterocycles are shown to be of utmost importance in the field of medicinal chemistry, as emphasized by the review paper. It emphasizes the central importance of chemical insights and pharmacological potential in developing novel and effective antiviral medicines by bringing them together.


Asunto(s)
Antivirales , Compuestos Heterocíclicos , Nitrógeno , Antivirales/farmacología , Antivirales/química , Compuestos Heterocíclicos/química , Compuestos Heterocíclicos/farmacología , Humanos , Nitrógeno/química , Animales
12.
Artículo en Inglés | MEDLINE | ID: mdl-38288792

RESUMEN

The objective of this review is to present a succinct summary of the latest advancements in the utilization of hydrogels for diverse biomedical applications, with a particular focus on their revolutionary impact in augmenting the delivery of drugs, tissue engineering, along with diagnostic methodologies. Using a meticulous examination of current literary works, this review systematically scrutinizes the nascent patterns in applying hydrogels for biomedical progress, condensing crucial discoveries to offer a comprehensive outlook on their ever-changing importance. The analysis presents compelling evidence regarding the growing importance of hydrogels in biomedicine. It highlights their potential to significantly enhance drug delivery accuracy, redefine tissue engineering strategies, and advance diagnostic techniques. This substantiates their position as a fundamental element in the progress of modern medicine. In summary, the constantly evolving advancement of hydrogel applications in biomedicine calls for ongoing investigation and resources, given their diverse contributions that can revolutionize therapeutic approaches and diagnostic methods, thereby paving the way for improved patient well-being.

13.
Artículo en Inglés | MEDLINE | ID: mdl-38031768

RESUMEN

BACKGROUND: Functional foods offer an appealing way to improve health and prevent chronic diseases, and this subject has received much attention lately. They are effective in preventing chronic diseases like cancer, diabetes, heart disease, and obesity, according to research. OBJECTIVE: This work presents an in-depth analysis of functional foods, covering key challenges from a scientific, legal, and commercial perspective. METHODS: Multiple databases were searched to find studies on functional foods included in the systematic literature review. Various aspects of functional foods, from their classification, impact on human wellness, effectiveness in inhibiting chronic diseases, the regulatory environment, global market trends, and industry challenges, are all clarified in this thorough review. RESULTS: This study aims to enhance understanding and establish a pathway for functional foods to be acknowledged as valid choices in the field of dietary supplements. It provides a thorough investigation of bioactive compounds present in functional foods, including but not limited to polyphenols, carotenoids, omega fatty acids, prebiotics, probiotics, and dietary fiber, along with an overview of their potential to mitigate chronic illnesses. We engage in an in-depth exploration of regulatory frameworks, shed light on groundbreaking research advancements, and meticulously examine strategies for commercialization and the variety of global challenges that accompany them. Establishing scientific consensus, navigating complex regulatory processes, dealing with skeptical consumers, and rising levels of competition are all problems that need to be solved in this field. CONCLUSION: The field of functional foods can advance further, promoting better public health outcomes, by deeply comprehending and addressing these complex dimensions.

14.
Case Rep Cardiol ; 2023: 5073128, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37841691

RESUMEN

Background: Valvular strands seen on echocardiography carry a wide differential diagnosis and may not always have a clear etiology despite taking clinical context into account. The decision of whether to provide anticoagulation for these lesions can be challenging. Case Presentation. A young adult female with an extensive rheumatologic history involving relapsing polychondritis and positive lupus anticoagulant presents to the emergency department with a discolored and painful right toe, as well as right auricular pain and swelling. Initial work-up revealed a possible splenic infarct, vasculitis of the right lower extremity, and mitral valve echodensities on echocardiography, without evidence of infective endocarditis. Due to concern that nonbacterial thrombotic endocarditis may be the cause of the patient's thromboembolic event, her valvular lesions were treated with low molecular weight heparin while awaiting serial imaging. When follow-up echocardiography showed no change in the size of her mitral valve lesions, which would be most consistent with Lambl's excrescences, the care team still faced a decision about which long-term anticoagulation to prescribe. This patient of childbearing age wished to avoid the teratogenicity and long-term monitoring associated with warfarin therapy. Although warfarin was the preferred agent for the patient's rheumatologic comorbidities, she elected to receive enoxaparin therapy for long-term thromboembolism prophylaxis. Conclusions: Even when accounting for clinical context, valvular lesions seen on echocardiography often have uncertain etiology and may require time and serial imaging to determine which treatment to pursue. When long-term anticoagulation is provided for females of childbearing age, shared decision-making with consideration of the patient's personal priorities and comorbidities is essential.

15.
Artículo en Inglés | MEDLINE | ID: mdl-37807405

RESUMEN

BACKGROUND: Organoids are in vitro models that exhibit a three-dimensional structure and effectively replicate the structural and physiological features of human organs. OBJECTIVE: This work examines the potential applications of organoid technology, as well as the challenges and future directions associated with its implementation. METHODS: The manuscript was put together by conducting a comprehensive literature review, which involved an in-depth evaluation of globally renowned scientific research databases. RESULTS: The field of organoids has generated significant attention due to its potential applications in tissue development and disease modelling, as well as its implications for personalised medicine, drug screening, and cell-based therapies. The utilisation of organoids has proven to be effective in the examination of various conditions, encompassing genetic disorders, cancer, neurodevelopmental disorders and infectious diseases. CONCLUSION: The exploration of the wider uses of organoids is still in its early phases. Research shall be conducted to integrate 3D organoid systems as alternatives for current models, potentially improving both fundamental and clinical studies in the future.

16.
Expert Rev Cardiovasc Ther ; 21(9): 631-641, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37608465

RESUMEN

BACKGROUND: There is limited evidence on the effect of sex on permanent pacemaker implantation (PPMI) after transcatheter aortic valve replacement (TAVR). The primary objective of this meta-analysis was to determine the role of sex among patients requiring PPMI post-TAVR. METHODS: A literature search was conducted using the SCOPUS, MEDLINE, and CINAHL databases for studies published until October 2022. Eligible studies included published randomized controlled trials (RCTs) and Observational Cohort Studies (OCS) articles that reported PPMI as an outcome of pacemaker status following TAVR. This study was performed per the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Guidelines. Publication bias was estimated using a Funnel plot and Egger's test. Data were pooled using a random-effects model. The primary endpoint was the sex difference in PPMI after TAVR, with odds ratios and 95% confidence intervals (CIs) extracted. RESULTS: Data was obtained from 63 studies, and a total of 79,655 patients were included. The cumulative PPMI rate was 15.5% (95% CI, 13.6%-17.7%). The pooled analysis revealed that while there were more females than males undergoing TAVR (51.6%, 95% CI 50.4%-52.8%), males have a 14.5% higher risk for post-TAVR PPMI than females (OR 1.145, 95% CI 1.047-1.253, P < 0.01). CONCLUSIONS: Males are more likely to experience PPMI after TAVR than females. Further research needs to be done to better explain these observed differences in outcomes.


Asunto(s)
Estenosis de la Válvula Aórtica , Marcapaso Artificial , Reemplazo de la Válvula Aórtica Transcatéter , Masculino , Femenino , Humanos , Reemplazo de la Válvula Aórtica Transcatéter/efectos adversos , Válvula Aórtica/cirugía , Estenosis de la Válvula Aórtica/cirugía , Caracteres Sexuales , Factores de Riesgo , Resultado del Tratamiento
17.
Cells ; 12(16)2023 08 10.
Artículo en Inglés | MEDLINE | ID: mdl-37626853

RESUMEN

HK2 and PKM2 are two main regulators of aerobic glycolysis. Photoreceptors (PRs) use aerobic glycolysis to produce the biomass necessary for the daily renewal of their outer segments. Previous work has shown that HK2 and PKM2 are important for the normal function and long-term survival of PRs but are dispensable for PR maturation, and their individual loss has opposing effects on PR survival during acute nutrient deprivation. We generated double conditional (dcKO) mice lacking HK2 and PKM2 expression in rod PRs. Western blotting, immunofluorescence, optical coherence tomography, and electroretinography were used to characterize the phenotype of dcKO animals. Targeted and stable isotope tracing metabolomics, qRT-PCR, and retinal oxygen consumption were performed. We show that dcKO animals displayed early shortening of PR inner/outer segments, followed by loss of PRs with aging, much more rapidly than either knockout alone without functional loss as measured by ERG. Significant alterations to central glucose metabolism were observed without any apparent changes to mitochondrial function, prior to PR degeneration. Finally, PR survival following experimental retinal detachment was unchanged in dcKO animals as compared to wild-type animals. These data suggest that HK2 and PKM2 have differing roles in promoting PR neuroprotection and identifying them has important implications for developing therapeutic options for combating PR loss during retinal disease.


Asunto(s)
Ciclo del Ácido Cítrico , Células Fotorreceptoras Retinianas Bastones , Animales , Ratones , Metabolómica , Consumo de Oxígeno , Retina , Animales Salvajes
18.
Frontline Gastroenterol ; 14(5): 359-370, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37581186

RESUMEN

As a result of the increasing incidence of cirrhosis in the UK, more patients with chronic liver disease are being considered for elective non-hepatic surgery. A historical reluctance to offer surgery to such patients stems from general perceptions of poor postoperative outcomes. While this is true for those with decompensated cirrhosis, selected patients with compensated early-stage cirrhosis can have good outcomes after careful risk assessment. Well-recognised risks include those of general anaesthesia, bleeding, infections, impaired wound healing, acute kidney injury and cardiovascular compromise. Intra-abdominal or cardiothoracic surgery are particularly high-risk interventions. Clinical assessment supplemented by blood tests, imaging, liver stiffness measurement, endoscopy and assessment of portal pressure (derived from the hepatic venous pressure gradient) can facilitate risk stratification. Traditional prognostic scoring systems including the Child-Turcotte-Pugh and Model for End-stage Liver Disease are helpful but may overestimate surgical risk. Specific prognostic scores like Mayo Risk Score, VOCAL-Penn and ADOPT-LC can add precision to risk assessment. Measures to mitigate risk include careful management of varices, nutritional optimisation and where possible addressing any ongoing aetiological drivers such as alcohol consumption. The role of portal decompression such as transjugular intrahepatic portosystemic shunting can be considered in selected high-risk patients, but further prospective study of this approach is required. It is of paramount importance that patients are discussed in a multidisciplinary forum, and that patients are carefully counselled about potential risks and benefits.

19.
J Clin Med ; 12(13)2023 Jun 26.
Artículo en Inglés | MEDLINE | ID: mdl-37445326

RESUMEN

OBJECTIVE: Cut-offs for high-sensitivity troponin (hs-Tn) elevations to define prognostically significant peri-operative myocardial injury (PMI) in cardiac surgery is not well-established. We evaluated the associations between peri-operative high-sensitivity troponin T (hs-TnT) elevations and 1-year all-cause mortality in patients undergoing cardiac surgery. METHODS: The prognostic significance of baseline hs-TnT and various thresholds for post-operative hs-TnT elevation at different time-points on 1-year all-cause mortality following cardiac surgery were assessed after adjusting for baseline hs-TnT and EuroSCORE in a post-hoc analysis of the ERICCA trial. RESULTS: 1206 patients met the inclusion criteria. Baseline elevation in hs-TnT >x1 99th percentile upper reference limit (URL) was significantly associated with 1-year all-cause mortality (adjusted hazard ratio 1.90, 95% confidence interval 1.15-3.13). In the subgroup with normal baseline hs-TnT (n = 517), elevation in hs-TnT at all post-operative time points was associated with higher 1-year mortality, reaching statistical significance for elevations above: ≥100 × URL at 6 h; ≥50 × URL at 12 and 24 h; ≥35 × URL at 48 h; and ≥30 × URL at 72 h post-surgery. Elevation in hs-TnT at 24 h ≥ 50 × URL had the optimal sensitivity and specificity (73% and 75% respectively). When the whole cohort of patients was analysed, including those with abnormal baseline hs-TnT (up to 10 × URL), the same threshold had optimal sensitivity and specificity (66% and 70%). CONCLUSIONS: Both baseline and post-operative hs-TnT elevations are independently associated with 1-year all-cause mortality in patients undergoing cardiac surgery. The optimal threshold to define a prognostically significant PMI in our study was ≥50 × URL elevation in hs-TnT at 24 h.

20.
Cell Death Discov ; 9(1): 175, 2023 May 26.
Artículo en Inglés | MEDLINE | ID: mdl-37236979

RESUMEN

The global high prevalence of COVID-19 is a major challenge for health professionals and patients. SARS-CoV-2 virus has four structural protein components: the spike protein, envelope protein, membrane protein, and nucleocapsid protein. The SARS-CoV-2 virus mutates predominantly in the spike proteins, whilst the other key viral components usually remain stable. Essentially the pathological functions of the SARS-CoV-2 virus on different cell types are still largely unknown. Previous studies have shown that the human oral cavity can potentially act as reservoir of the SARS-CoV-2 virus. However, the consequence of SARS-CoV-2 viral infection on human oral health has not been systematically examined. COVID-19 can cause severe oral mucosa lesions and is likely to be connected with poor periodontal conditions. Fibroblasts are the major cell type inside periodontal ligament (PDL) and express the SARS-CoV-2 receptor: Angiotensin-converting enzyme 2 (ACE2), whose expression level can increase upon bacterial infection hence potentially provide a direct route of SARS-CoV-2 infection to PDL fibroblasts. In this research, we aimed to study the pathogenicity of SARS-CoV-2 viral components on human fibroblasts. We found that by exposing to SARS-CoV-2, especially to the viral envelope and membrane proteins, the human periodontal fibroblasts could develop fibrotic pathogenic phenotypes, including hyperproliferation that was simultaneously induced with increased apoptosis and senescence. The fibrotic degeneration was mediated by a down-regulation of mitochondrial ß-oxidation in the fibroblasts. Fatty acid ß-oxidation inhibitor, etomoxir treatment could mirror the same pathological consequence on the cells, similar to SARS-CoV-2 infection. Our results therefore provide novel mechanistic insights into how SARS-CoV-2 infection can affect human periodontal health at the cell and molecular level with potential new therapeutic targets for COVID-19 induced fibrosis.

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