{"title":"Impairment of Endogenous H2S Pathway due to Aging and Endothelium Denudation in Mouse Isolated Thoracic Aorta.","authors":"F Aydinoglu, E N Erdem, T Toyran, N Ogulener","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Hydrogen sulfide (H2S) is a gas neurotransmitter that is synthesized in various mammalian tissues including vascular tissues and regulates vascular tone. The aim of this study is to investigate whether the endogenous L-cysteine/H2S pathway is impaired due to aging and endothelial denudation in mouse isolated thoracic aorta. For this purpose, young (3-4 months) and old (23-25 months) mice were used in the experiments. The effects of aging and endothelium on endogenous and exogenous H2S-induced vasorelaxation were investigated by cumulative L-cysteine-(1 microM-10 mM) and NaHS-(1 microM-3 mM) induced vasorelaxations, respectively. The L-cysteine-induced relaxations were reduced in old mice aorta compared to the young mice. Also, vasorelaxant responses to L-cysteine (1 microM-10 mM) were reduced on aorta rings with denuded-endothelium of young and old mice. However, the relaxation responses to NaHS were not altered by age or endothelium denudation. The loss of staining of CSE in the endothelial layer was observed in old thoracic aorta. Ach-induced (1-30 microM) relaxation almost abolished in endothelium-denuded rings from both mice group. Also, relaxation Ach reduced in intact endothelium tissue of old mice aorta. In conclusion, the vasorelaxant responses to L-cysteine but not NaHS decreased and the protein expression of CSE reduced in old thoracic aorta rings consistent with a decrease in H2S concentration with aging and endothelium damage, suggesting that aging may be lead to decrease in enzyme expression and H2S signaling system due to endothelium damage in mouse thoracic aorta. Key words Aging, Hydrogen sulfide, L-cysteine, Endothelium, Thoracic aorta.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"59-68"},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995931/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Research Progress of Hydromorphone in Clinical Application.","authors":"L Liu, M Xu, J Wang, Y Hu, Z Huang","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A common opioid analgesic for cancer pain and, to a lesser extent, non-cancer pain, is hydromorphone (HM). Oral formulations as well as subcutaneous, intravenous, and other routes are frequently used for its administration. Its pharmacokinetics and pharmacodynamics have also been extensively researched. This article examines the pharmacological properties of hydromorphone and the development of its use both domestically and internationally with the goal of serving as a reference for the sensible clinical use of this medication. Key words Hydromorphone, Pharmacological action, Route of administration, Cancer pain, Adverse effects.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"41-48"},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J B Borges, A Valerianova, L Tejkl, J Malik, M Mlček, O Kittnar
{"title":"First Real-Time Imaging of Acute Effects of Arteriovenous Fistula on Regional Distribution of Pulmonary Perfusion in a Novel Porcine Model.","authors":"J B Borges, A Valerianova, L Tejkl, J Malik, M Mlček, O Kittnar","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The effects of a large arteriovenous fistula (AVF) on pulmonary perfusion remains to be elucidated. We aimed to study, for the first time, the real-time acute effects of a large AVF on regional distribution of pulmonary perfusion in a novel porcine model. Ten healthy swine under general anesthesia were studied. AVF was created by the connection of femoral artery and femoral vein using high-diameter perfusion cannulas. The AVF was closed and after 30 min of stabilization the first values were recorded. The fistula was then opened, and new data were collected after reaching stable state. Continuous hemodynamic monitoring was performed throughout the protocol. The following functional images were analyzed by electrical impedance tomography (EIT): perfusion and ventilation distributions. We found an increased cardiac output and right ventricular work, which was strongly correlated to an increased pulmonary artery mean pressure (r=0.878, P=0.001). The ventral/dorsal ratio of pulmonary perfusion decreased from 1.9+/-1.0 to 1.5+/-0.7 (P=0.025). The percentage of total pulmonary blood flow through the dorsal lung region increased from 38.6+/-11.7 to 42.2+/-10.4 (P=0.016). In conclusion, we have used EIT for the first time for studying the acute effects of a large AVF on regional distribution of pulmonary perfusion in a novel porcine model. In this new experimental model of hyperkinetic circulation caused by AVF, we documented an increased percentage of total pulmonary blood flow through the dorsal lung region and a more homogeneous perfusion distribution. Key words Arteriovenous fistula, Hyperkinetic circulation, Tissue perfusion, Animal model, Pulmonary blood flow.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"49-57"},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995935/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M Javorka, D Švec, V Bikia, B Czippelová, N Stergiopulos, J Čerňanová Krohová
{"title":"In silico validation of non-invasive arterial compliance estimation and potential determinants of its variability.","authors":"M Javorka, D Švec, V Bikia, B Czippelová, N Stergiopulos, J Čerňanová Krohová","doi":"10.33549/physiolres.935466","DOIUrl":"10.33549/physiolres.935466","url":null,"abstract":"<p><p>Arterial compliance (AC) is an important cardiovascular parameter characterizing mechanical properties of arteries. AC is significantly influenced by arterial wall structure and vasomotion, and it markedly influences cardiac load. A new method, based on a two-element Windkessel model, has been recently proposed for estimating AC as the ratio of the time constant T of the diastolic blood pressure decay and peripheral vascular resistance derived from clinically available stroke volume measurements and selected peripheral blood pressure parameters which are less prone to peripheral distortions. The aim of this study was to validate AC estimation using a virtual population generated by in silico model of the systemic arterial tree. In the second part of study, we analysed causal coupling between AC oscillations and variability of its potential determinants - systolic blood pressure and heart rate in healthy young human subjects. The pool of virtual subjects (n=3818) represented an extensive AC distribution. AC was estimated from the peripheral blood pressure curve and by the standard method from the aortic blood pressure curve. The proposed method slightly overestimated AC set in the model but both ACs were strongly correlated (r=0.94, p<0.001). In real data, we observed that AC dynamics was coupled with basic cardiovascular parameters variability independently of the autonomic nervous system state. In silico analysis suggests that AC can be reliably estimated by noninvasive method. The analysis of short-term AC variability together with its determinants could improve our understanding of factors involved in AC dynamics potentially improving assessment of AC changes associated with atherosclerosis process. Key words Arterial compliance, Cardiovascular model, Arterial blood pressure, Causal analysis, Volume-clamp photoplethysmography.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"73 S3","pages":"S771-S780"},"PeriodicalIF":1.9,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11827062/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142979729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J Doul, O Gawrys, P Škaroupková, Z Vaňourková, B Szeiffová Bačová, M Sýkora, H Maxová, L Hošková, M Šnorek, J Sadowski, M Táborský, L Červenka
{"title":"Effects of renal denervation on the course of cardiorenal syndrome: insight from studies with fawn-hooded hypertensive rats.","authors":"J Doul, O Gawrys, P Škaroupková, Z Vaňourková, B Szeiffová Bačová, M Sýkora, H Maxová, L Hošková, M Šnorek, J Sadowski, M Táborský, L Červenka","doi":"10.33549/physiolres.935469","DOIUrl":"10.33549/physiolres.935469","url":null,"abstract":"<p><p>Combination of chronic kidney disease (CKD) and heart failure (HF) results in extremely high morbidity and mortality. The current guideline-directed medical therapy is rarely effective and new therapeutic approaches are urgently needed. The study was designed to examine if renal denervation (RDN) will exhibit long-standing beneficial effects on the HF- and CKD-related morbidity and mortality. Fawn-hooded hypertensive rats (FHH) served as a genetic model of CKD and fawn-hooded low-pressure rats (FHL) without CKD served as controls. HF was induced by creation of aorto-caval fistula (ACF). RDN was performed 28 days after creation of ACF and the follow-up period was 70 days. ACF FHH subjected to sham-RDN had survival rate of 34 % i.e. significantly lower than 79 % observed in sham-denervated ACF FHL. RDN did not improve the condition and the final survival rate, both in ACF FHL and in ACF FHH. In FHH basal albuminuria was markedly higher than in FHL, and further increased throughout the study. RDN did not lower albuminuria and did not reduce renal glomerular damage in FHH. In these rats creation of ACF resulted in marked bilateral cardiac hypertrophy and alterations of cardiac connexin-43, however, RDN did not modify any of the cardiac parameters. Our present results further support the notion that kidney damage aggravates the HF-related morbidity and mortality. Moreover, it is clear that in the ACF FHH model of combined CKD and HF, RDN does not exhibit any important renoprotective or cardioprotective effects and does not reduce mortality. Key words Chronic kidney disease, Heart failure, Renal denervation, Fawn-hooded hypertensive rats.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"73 S3","pages":"S737-S754"},"PeriodicalIF":1.9,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11827057/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142979726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Risk impact of SARS-CoV-2 coronavirus and spike protein on cardiac tissue: a comprehensive review.","authors":"O Šerý, R Dziedzinska","doi":"10.33549/physiolres.935476","DOIUrl":"10.33549/physiolres.935476","url":null,"abstract":"<p><p>The global COVID-19 pandemic, caused by SARS-CoV-2, has led to significant morbidity and mortality, with a profound impact on cardiovascular health. This review investigates the mechanisms of SARS-CoV-2's interaction with cardiac tissue, particularly emphasizing the role of the Spike protein and ACE2 receptor in facilitating viral entry and subsequent cardiac complications. We dissect the structural features of the virus, its interactions with host cell receptors, and the resulting pathophysiological changes in the heart. Highlighting SARS-CoV-2's broad organ tropism, especially its effects on cardiomyocytes via ACE2 and TMPRSS2, the review addresses how these interactions exacerbate cardiovascular issues in patients with pre-existing conditions such as diabetes and hypertension. Additionally, we assess both direct and indirect mechanisms of virus-induced cardiac damage, including myocarditis, arrhythmias, and long-term complications such as 'long COVID'. This review underscores the complexity of SARS-CoV-2's impact on the heart, emphasizing the need for ongoing research to fully understand its long-term effects on cardiovascular health. Key words: COVID-19, Heart, ACE2, Spike protein, Cardiomyocytes, Myocarditis, Long COVID.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"73 S3","pages":"S655-S669"},"PeriodicalIF":1.9,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11827061/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142979735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T Lerchner, J Jedlička, M Kripnerová, J Dejmek, J Kuncová
{"title":"Influence of micro- and nanoplastics on mitochondrial function in the cardiovascular system: a review of the current literature.","authors":"T Lerchner, J Jedlička, M Kripnerová, J Dejmek, J Kuncová","doi":"10.33549/physiolres.935500","DOIUrl":"10.33549/physiolres.935500","url":null,"abstract":"<p><p>Mitochondria represent pivotal cellular organelles endowed with multifaceted functionalities encompassing cellular respiration, metabolic processes, calcium turnover, and the regulation of apoptosis, primarily through the generation of reactive oxygen species (ROS). Perturbations in mitochondrial dynamics have been intricately linked to the etiology of numerous cardiovascular pathologies, such as heart failure, ischemic heart disease, and various cardiomyopathies. Notably, recent attention has been directed towards the detrimental impact of micro- and nanoplastic pollution on mitochondrial integrity, an area underscored by a paucity of comprehensive investigations. Given the escalating prevalence of plastic particle contamination and the concomitant burden of cardiovascular disease in aging populations, understanding the interplay between mitochondria within the cardiovascular system and micro- and nanoplastic pollution assumes paramount importance. This review endeavors to elucidate the current albeit limited comprehension surrounding this complex interplay. Key words Mitochondria, Nanoplastics, Microplastics, Cardiovascular system, Endothelial function, Oxidative phosphorylation.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"73 S3","pages":"S685-S695"},"PeriodicalIF":1.9,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11827056/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142979731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"LDHA- Mediated Histone Lactylation Promotes the Nonalcoholic Fatty Liver Disease Progression Through Targeting The METTL3/ YTHDF1/SCD1 m6A Axis.","authors":"J Meng, C Yan, J Liu","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Nonalcoholic fatty liver disease (NAFLD) is characterized by elevated hepatic lipids caused by nonalcoholic factors, where histone lactylation is lately discovered as a modification driving disease progression. This research aimed to explore the role of histone 3 lysine 18 lactylation (H3K18lac) in NAFLD progression using a high-fat diet (HFD)-treated mouse model and free fatty acids (FFA)-treated L-02 cell lines. Lipids accumulation was screened via Oil Red O staining, real-time quantitative polymerase chain reaction (RT-qPCR), western blotting, and commercially available kits. Similarly, molecular mechanism was analyzed using immunoprecipitation (IP), dual-luciferase reporter assay, and RNA decay assay. Results indicated that FFA upregulated lactate dehydrogenase A (LDHA) and H3K18lac levels in L-02 cells. Besides, LDHA-mediated H3K18lac was enriched on the proximal promoter of methyltransferase 3 (METTL3), translating into an increased expression. Moreover, METTL3 or LDHA knockdown relieved lipid accumulation, decreased total cholesterol (TC) and triglyceride (TG) levels, and downregulated lipogenesis-related proteins in FFA-treated L-02 cell lines, in addition to enhancing the m6A and mRNA levels of stearoyl-coenzyme A desaturase 1 (SCD1). The m6A modification of SCD1 was recognized by YTH N6-methyladenosine RNA binding protein F1 (YTHDF1), resulting in enhanced mRNA stability. LDHA was found to be highly expressed in HFD-treated mice, where knocking down LDHA attenuated HFD-induced hepatic steatosis. These findings demonstrated that LDHA-induced H3K18lac promoted NAFLD progression, where LDHA-induced H3K18lac in METTL3 promoter elevated METTL3 expression, thereby promoting m6A methylation and stabilizing SCD1 via a YTHDF1-dependent manner. Keywords: Nonalcoholic fatty liver disease, LDHA, METTL3, YTHDF1, Histone lactylation.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"73 6","pages":"985-999"},"PeriodicalIF":1.9,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11835221/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143189780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"New possibilities of the prevention and treatment of cardiovascular pathologies. the potential of molecular hydrogen in the reduction of oxidative stress and its consequences.","authors":"J Slezák, T Ravingerová, B Kura","doi":"10.33549/physiolres.935491","DOIUrl":"10.33549/physiolres.935491","url":null,"abstract":"<p><p>Disproportion between reactive oxygen species (ROS) production and the body's antioxidant system can cause oxidative stress, which is considered a common denominator in various pathological conditions, including cardiovascular diseases, aging, and cognitive disorders. The generation of free radicals, which occurs through partial reduction of oxygen, can quickly overwhelm the endogenous antioxidant system capacity of the cell. This causes lipid, protein, DNA and RNA damage, inflammation, and overall cell degeneration, which can be mitigated by various antioxidants. However, their use in human medicine did not bring the expected effect. Molecular hydrogen (H2), due to its unique physical and chemical properties, provides a number of benefits for alleviating oxidative stress. H2 is superior to conventional antioxidants as it can selectively reduce (.)OH radicals while preserving important ROS that are otherwise used for normal cell signaling. Key words Oxidative stress, Cardiovascular diseases, Molecular hydrogen, ROS, Inflammation.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"73 S3","pages":"S671-S684"},"PeriodicalIF":1.9,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11827053/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142979733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T Grimmichová, V Kukliková, B Bulanová, P Pačesová, E Václavíková, J Moravcová, Z Novák, K Mastnikova, M Vaňková
{"title":"Type 2 Diabetes, Obesity and Their Relation to the Risks of Thyroid Cancer.","authors":"T Grimmichová, V Kukliková, B Bulanová, P Pačesová, E Václavíková, J Moravcová, Z Novák, K Mastnikova, M Vaňková","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objective: </strong>patients with type 2 diabetes (T2DM) and obesity are generally known to have increased risk of various types of cancer, though studies addressing associations between T2DM/obesity and thyroid cancer are inconclusive. The aim of our study was to evaluate the risk of thyroid cancer focusing on diabetic patients under conditions of euthyroid status. A retrospective study in 184 patients was performed. Three cohorts were established according to tumor histology: malignant (M), benign (B) and low-risk carcinoma (MB). Fisher's exact test and Kruskal-Wallis one-way ANOVA of ranks were used for statistical analysis. The M (39.1 %), B (57.6 %) and MB (3.3 %) cohorts had comparable age (p=0.4), BMI (p=0.452), glycaemia (p=0.834), Hb1AC (p=0.157) and HOMA-IR (p=0.235). T2DM patients had larger thyroid gland volumes (28.8 vs 17.6 mL;p=0.001) compared to the cohort with normal glucose tolerance. Compared to women, men had more frequently present distal metastases (p=0.017), minimally invasive disease (p=0.027), more advanced staging (p=0.01) and positive pathogenic mutations in the TERT gene (p=0.009);these results were also significant for the diabetic male cohort (p=0.026). Type 2 diabetes and obesity are not risk factors for thyroid cancer, but a subgroup of males seems to have thyroid cancers of poorer prognosis. In general, diabetic patients with insulin resistance and hyperinsulinemia are also prone to have a goiter.</p><p><strong>Key words: </strong>Thyroid cancer, Type 2 diabetes, Obesity, Thyroid nodule, Insulin resistance.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"73 6","pages":"1025-1035"},"PeriodicalIF":1.9,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11835217/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143189961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}