Physiological research最新文献

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The Structure and Functional Changes of Thyroid in Severe Acute Pancreatitis Rats. 重症急性胰腺炎大鼠甲状腺结构和功能的变化。
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-24
B Yang, H Qiao, Y Liu, X Wang, W Peng
{"title":"The Structure and Functional Changes of Thyroid in Severe Acute Pancreatitis Rats.","authors":"B Yang, H Qiao, Y Liu, X Wang, W Peng","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Severe acute pancreatitis (SAP) is associated with metabolic disorders, hypocalcemia, and multiple organ failure. The objective of this study was to investigate changes in thyroid ultrastructure and function in rats with SAP and to provide a theoretical basis for the clinical treatment of thyroid injury in patients with SAP. 64 male SPF Wistar rats were randomly divided into the SAP group and the control group. Pancreatic enzymatic indicators and thyroid hormones were detected, pathology scores were evaluated, and morphological changes were observed under light microscopy and transmission electron microscopy (TEM) in both groups. The serum levels of triiodothyronine (T3), tetraiodothyronine (T4) and Ca2+ were significantly lower in the SAP group than in the control group (P<0.05), whereas the level of calcitonin (CT) was significantly higher than that in the control group (P<0.05). The thyroid structure (pathology and electron microscopy) of the SAP rats was seriously damaged and worsened over time. SAP can cause thyroid injury through a variety of mechanisms, which can also retroact to pancreatitis to aggravate the inflammatory response. This study may have theoretical significance for basic research on SAP. Key words Severe acute pancreatitis, Thyroid, Structure and functional changes, Transmission electron microscopy.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"105-114"},"PeriodicalIF":1.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995943/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143692923","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}
引用次数: 0
Direct Effects of Waterpipe Smoke Extract on Aortic Endothelial Cells: An In Vitro Study. 水烟提取物对主动脉内皮细胞直接影响的体外研究。
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-24
N E Zaaba, P Yuvarayu, S Beegam, O Elzaki, K Arafat, S Attoub, A Nemmar
{"title":"Direct Effects of Waterpipe Smoke Extract on Aortic Endothelial Cells: An In Vitro Study.","authors":"N E Zaaba, P Yuvarayu, S Beegam, O Elzaki, K Arafat, S Attoub, A Nemmar","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Waterpipe smoking (WPS) has adverse health effects that include endothelial dysfunction with mechanisms involving oxidative stress and inflammation. Nonetheless, there is a scarcity of data on the direct impact of WPS on endothelial function. In this study, we assessed the in vitro effects of waterpipe smoke extract (WPSE) on aortic endothelial cell lines, namely the TeloHAEC. The WPSE markedly caused concentration- and time-dependent decreases in cellular viability. When compared with the control, at a concentration of 20 % and an incubation period of 48 h, the WPSE significantly increased the levels of lactate dehydrogenase, and markers of oxidative stress including thiobarbituric acid reactive substances, superoxide dismutase, catalase, and reduced glutathione. Moreover, the concentrations of proinflammatory cytokine (tumor necrosis factor alpha), and adhesion molecules (E-selectin and intercellular adhesion molecule-1) were also significantly augmented. Likewise, WPSE triggered mitochondrial dysfunction, DNA oxidative damage, as well as apoptosis in TeloHAEC cells. Similarly, cells cultured with WPSE have shown increased expression of phosphorylated nuclear factor-kappaB and hypoxia-inducible factor 1-alpha (HIF-1alpha). In conclusion, our study showed that WPSE triggers endothelial inflammation, oxidative stress, DNA damage, mitochondrial dysfunction, and apoptosis via mechanisms involving the activation of nuclear factor-kappaB and HIF-1alpha. Key words Waterpipe smoking, Aortic endothelial cells, Inflammation, Oxidative Stress.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"69-78"},"PeriodicalIF":1.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995937/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143691808","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}
引用次数: 0
Efficacy of Rhythmic Photic Stimulation for Autonomic Nervous System Regulation in University Students. 节律性光刺激对大学生自主神经系统调节的作用。
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-24
S-Y Yang, P-C Wang, C-M Chen, P-H Lin, C Liu
{"title":"Efficacy of Rhythmic Photic Stimulation for Autonomic Nervous System Regulation in University Students.","authors":"S-Y Yang, P-C Wang, C-M Chen, P-H Lin, C Liu","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>University students frequently encounter stress and anxiety, impacting their autonomic nervous system and mental health. Rhythmic photic stimulation (RPS) at various frequencies is considered a potential intervention for anxiety and depression, but its effectiveness is not fully understood. This research aimed to assess the impact of RPS at theta (6 Hz), alpha (10 Hz), and beta (25 Hz) frequencies on autonomic nervous system regulation in university students, comparing the effects between those with and without depression symptoms. Conducted at a southern Taiwan university, this quasi-experimental study involved RPS interventions at specified frequencies, with pre and post assessments of heartbeat, blood pressure, and heart rate variability. Among 62 participants (average age 20.29±0.61), those without depression showed a notable blood pressure reduction following theta-frequency RPS compared to other frequencies (p<0.05). A similar pattern was observed when comparing non-depressed and depressed participants after theta-RPS, with depressed individuals experiencing an increase in sympathetic activity (p<0.05). RPS, particularly at theta frequency, can significantly influence the autonomic nervous system, suggesting a potential for reducing anxiety-related physiological markers in university students. Further verification with a larger and longitudinal study is warranted. Key words Binaural beat, Rhythmical photic stimulation, Autonomic nervous system, University student.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"149-160"},"PeriodicalIF":1.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995936/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143692452","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}
引用次数: 0
Bergaptol Ameliorates Insulin Sensitivity in Gestational Diabetes Mellitus by Inhibiting the Inflammatory Pathway in Streptozotocin-Induced Diabetic Rats. 贝加普醇通过抑制链脲佐菌素诱导的糖尿病大鼠炎症途径改善妊娠期糖尿病胰岛素敏感性
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-24
Q Li, J Chen, Z Wang, L Zhuang, Z Yu, D Yang
{"title":"Bergaptol Ameliorates Insulin Sensitivity in Gestational Diabetes Mellitus by Inhibiting the Inflammatory Pathway in Streptozotocin-Induced Diabetic Rats.","authors":"Q Li, J Chen, Z Wang, L Zhuang, Z Yu, D Yang","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Investigation determines the beneficial effect of bergaptol against gestational diabetes (GD). Gestational diabetes was induced in female rats and treated them with bergaptol 20 and 40 mg/kg for eighteen days. Effect of bergaptol was assessed on blood glucose and insulin level in GD rat. Inflammatory mediators and oxidative stress parameters were also assessed in GD rats. Moreover, mRNA expression of INSR, NF-kappaB, Akt and GSK-3beta were assessed in the GD rats by qRT-PCR method. In silico network pharmacology study was performed, along with gene ontology and egg pathway to assessed the targets of bergaptol, molecular docking study was also performed for the confirmation of possible pathway involved in the management of GD. Blood glucose and insulin level was significantly reduces in the blood bergaptol treated group than GD group of rats. Treatment with bergaptol ameliorates the altered level of mediators of inflammation and oxidative stress parameters in GD rats. There was significant reduction in the mRNA expression of NF-kappaB and GSK-3beta and increase in expression of INSR and Akt in the tissue homogenate of bergaptol treated GD rats. Docking study shows effective binding strength of bergaptol individually with INSR, NF-kappaB, Akt and GSK-3beta-protein targets. In conclusion, data of investigation suggest that bergaptol improves the sensitivity of insulin receptor in GD, as it reduces parameters of oxidative stress and inflammatory mediators by regulating INSR/NF-kappaB/Akt/GSK-3beta pathway. Key words Gestational diabetes, Bergaptol, Insulin resistance, Inflammation, Oxidative stress.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"93-104"},"PeriodicalIF":1.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995933/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143693112","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}
引用次数: 0
Insights From TgF344-AD, a Double Transgenic Rat Model in Alzheimer's Disease Research. 阿尔茨海默病研究中的双转基因大鼠模型 TgF344-AD 的启示
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-21
A Nataraj, K Blahna, K Ježek
{"title":"Insights From TgF344-AD, a Double Transgenic Rat Model in Alzheimer's Disease Research.","authors":"A Nataraj, K Blahna, K Ježek","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Alzheimer's disease (AD), a leading cause of dementia worldwide, is a multifactorial neurodegenerative disorder characterized by amyloid-beta plaques, tauopathy, neuronal loss, neuro-inflammation, brain atrophy, and cognitive deficits. AD manifests as familial early-onset (FAD) with specific gene mutations or sporadic late-onset (LOAD) caused by various genetic and environmental factors. Numerous transgenic rodent models have been developed to understand AD pathology development and progression. The TgF344-AD rat model is a double transgenic model that carries two human gene mutations: APP with the Swedish mutation and PSEN-1 with delta exon 9 mutations. This model exhibits a complete repertoire of AD pathology in an age-dependent manner. This review summarizes multidisciplinary research insights gained from studying TgF344-AD rats in the context of AD pathology. We explore neuropathological findings; electrophysiological assessments revealing disrupted synaptic transmission, reduced spatial coding, network-level dysfunctions, and altered sleep architecture; behavioral studies highlighting impaired spatial memory; alterations in excitatory-inhibitory systems; and molecular and physiological changes in TgF344-AD rats emphasizing their age-related effects. Additionally, the impact of various interventions studied in the model is compiled, underscoring their role in bridging gaps in understanding AD pathogenesis. The TgF344-AD rat model offers significant potential in identifying biomarkers for early detection and therapeutic interventions, providing a robust platform for advancing translational AD research. Key words Alzheimer's disease, Transgenic AD models, TgF344-AD rats, Spatial coding.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"1-17"},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995940/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674472","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}
引用次数: 0
Mechanisms of Granulosa Cell Programmed Cell Death and Follicular Atresia in Polycystic Ovary Syndrome. 多囊卵巢综合征中颗粒细胞程序性死亡和卵泡闭锁的机制。
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-21
Y-H Shen, S Peng, T Zhu, M-J Shen
{"title":"Mechanisms of Granulosa Cell Programmed Cell Death and Follicular Atresia in Polycystic Ovary Syndrome.","authors":"Y-H Shen, S Peng, T Zhu, M-J Shen","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Polycystic ovary syndrome (PCOS) is a common endocrine disorder affecting women of reproductive age, characterized by a spectrum of reproductive, endocrine, and metabolic disturbances. The etiology of PCOS encompasses a complex interplay of genetic, metabolic, inflammatory, and oxidative factors, though the precise pathological mechanisms remain inadequately understood. Despite considerable variability in the clinical characteristics and biochemical profiles among individuals with PCOS, abnormalities in follicular development are a hallmark of the condition. Granulosa cells, integral to follicular development, play a pivotal role in follicle maturation. Recent studies have established a strong correlation between granulosa cell programmed cell death and follicular atresia in PCOS. This review provides a comprehensive analysis of the current understanding of granulosa cell programmed cell death and its contribution to follicular atresia within the pathophysiology of PCOS, providing a foundation for future research endeavors. Key words Follicular atresia, Hyperandrogenism, Insulin resistance, Polycystic ovary syndrome, Programmed cell death of granulosa cells.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"31-40"},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995941/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674475","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}
引用次数: 0
Impairment of Endogenous H2S Pathway due to Aging and Endothelium Denudation in Mouse Isolated Thoracic Aorta. 小鼠离体胸主动脉因老化和内皮细胞剥脱导致的内源性 H2S 通路损伤
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-21
F Aydinoglu, E N Erdem, T Toyran, N Ogulener
{"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}
引用次数: 0
Research Progress of Hydromorphone in Clinical Application. 氢吗啡酮临床应用研究进展。
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-21
L Liu, M Xu, J Wang, Y Hu, Z Huang
{"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}
引用次数: 0
Exploring the Asthma - Obesity Link Using Advanced Imaging Techniques. 利用先进的成像技术探索哮喘与肥胖的联系。
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-21
M Krivošová, R Barošová, E Lukáčová, J Hanusrichterová, N Nemcová, M Kolomazník, J Mokrý, D Mokrá
{"title":"Exploring the Asthma - Obesity Link Using Advanced Imaging Techniques.","authors":"M Krivošová, R Barošová, E Lukáčová, J Hanusrichterová, N Nemcová, M Kolomazník, J Mokrý, D Mokrá","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The global rise in obesity has emerged as a significant health concern, amplifying susceptibility to various diseases, including asthma. Epidemiological evidence demonstrates a higher prevalence of asthma among obese individuals, with obesity exacerbating asthma severity and control. This review aims to explore the interplay between asthma and obesity assessed by objective imaging methods and discusses the consistency between anthropometric and imaging methods. A literature search was conducted with the main keywords \"asthma\", \"obesity\", and \"imaging techniques\" using databases such as PubMed, Web of Sciences, and Scopus for the relevant articles published up to January 2024. The consistency between Body Mass Index (BMI), Waist Circumference (WC), and results from imaging techniques is uncertain. Unlike anthropometric methods, imaging methods provide us with the exact location of adipose tissue as well as fat and lean mass distinction, which can be further correlated with different airway parameters and respiratory system functions and dysfunctions. Studies indicate that the relationship between lung functions and obesity is more complex in females. Abdominal visceral fat is supposed to be the major asthma predictor already in the pediatric population. The connection between obesity and asthma is already evident in children and adolescents. Imaging methods can measure visceral and subcutaneous fat mass and both contribute to the association between obesity and lung functions. These methods are more accurate and reproducible but require more time and expertise. Key words Asthma, Obesity, Magnetic resonance imaging, Dual-energy, X-ray absorptiometry, Bioimpedance analysis.</p>","PeriodicalId":20235,"journal":{"name":"Physiological research","volume":"74 1","pages":"19-29"},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11995934/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674383","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}
引用次数: 0
First Real-Time Imaging of Acute Effects of Arteriovenous Fistula on Regional Distribution of Pulmonary Perfusion in a Novel Porcine Model. 新型猪模型动静脉瘘对肺灌注区域分布的急性影响的首次实时成像。
IF 1.9 4区 医学
Physiological research Pub Date : 2025-03-21
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}
引用次数: 0
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