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Gender peculiarities of cortisol, testosterone and vitamin D blood levels in athletes 运动员血液中皮质醇、睾酮和维生素 D 水平的性别差异
Pub Date : 2024-03-31 DOI: 10.51523/2708-6011.2024-21-1-14
Y. Brel, G. A. Medvedeva, A. S. Khaustava
   Objective. To assess the gender characteristics of the concentration of cortisol, testosterone and vitamin D in blood serum in athletes, and to analyze the correlations between vitamin D levels and the hormonal status of athletes.   Materials and methods. 52 athletes (32 men and 20 women) were examined, their age was 17-23, their sports specialization was cyclic sports (kayaking) and acyclic sports (gymnastics, martial arts), and qualification – candidates for master of sports, masters of sports. Venous blood was taken in the morning on an empty stomach before training loads. Determination of total testosterone and cortisol concentration and assessment of vitamin D level by determination of its metabolite 25(OH)D (25-hydroxyvitamin D) in blood serum was performed by immunochemiluminescent method.   Results. In male athletes with vitamin D deficiency, serum testosterone concentration and anabolic index were significantly lower (p = 0.0093 and p = 0.0015, respectively) compared to the same indices in the group of athletes with normal vitamin D content. Correlation analysis in male athletes revealed a positive correlation between serum 25(OH)D (25-hydroxyvitamin D) content and testosterone concentration (r = 0.36; p < 0.05), as well as between 25(OH)D content and anabolic index (r = 0.42; p < 0.05). The group of female athletes with vitamin D deficiency showed significantly lower serum testosterone concentration compared to athletes with normal vitamin D levels (p = 0.0112). No significant relationships were found between vitamin D levels and cortisol concentrations in both male and female athlete groups.    Conclusion. The study results can be the evidence of modulation effect of vitamin D on testosterone levels in male athletes, indicating the importance of controlling and correcting vitamin D content in the dynamics of the training process.
目的评估运动员血清中皮质醇、睾酮和维生素 D 浓度的性别特征,并分析维生素 D 水平与运动员荷尔蒙状态的相关性。 材料和方法研究对象为 52 名运动员(32 名男性和 20 名女性),他们的年龄在 17-23 岁之间,运动专项为周期性运动(皮划艇)和非周期性运动(体操、武术),资格--体育硕士候选人、体育硕士。静脉血在早晨空腹时抽取,然后再进行负荷训练。通过免疫化学发光法测定血清中总睾酮和皮质醇的浓度,并通过测定其代谢物 25(OH)D(25-羟基维生素 D)来评估维生素 D 的水平。 结果显示与维生素 D 含量正常的运动员组相比,维生素 D 缺乏的男性运动员的血清睾酮浓度和合成代谢指数明显较低(分别为 p = 0.0093 和 p = 0.0015)。对男性运动员进行的相关分析表明,血清中 25(OH)D(25-羟基维生素 D)含量与睾酮浓度之间呈正相关(r = 0.36;p < 0.05),25(OH)D 含量与合成代谢指数之间也呈正相关(r = 0.42;p < 0.05)。与维生素 D 含量正常的运动员相比,维生素 D 缺乏的女运动员血清睾酮浓度明显较低(p = 0.0112)。在男女运动员组中,维生素 D 水平与皮质醇浓度之间没有发现明显的关系。 结论研究结果可以证明维生素 D 对男性运动员睾酮水平的调节作用,表明在训练过程中控制和纠正维生素 D 含量的重要性。
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引用次数: 0
Changes in energy metabolism of rat myocardium during exposure to ionizing radiation 电离辐射照射下大鼠心肌能量代谢的变化
Pub Date : 2024-03-31 DOI: 10.51523/2708-6011.2024-21-1-11
A. N. Koval
   Objective. To study the effect of incorporated 137Cs on the energy metabolism of the myocardium of white rats.   Materials and methods. The work was carried out on 8 male white rats divided into 2 experimental groups, which were fed products contaminated with 137Cs for 7 days. Polarography was used to study the rate of oxygen consumption by myocardial tissue preparations on endogenous substrates, with the addition of exogenous succinic and glutamic acids, and with the addition of an uncoupler of oxidative phosphorylation, 2,4-dinitrophenol.Results. An increase in the rate of respiration on endogenous substrates caused by the uncoupling of oxidative phosphorylation was noted. At the same time, no statistically significant change in the amount of endogenous substrates was found.   Conclusion. The revealed violation of energy production in the myocardium of experimental animals is caused by the uncoupling of oxidative phosphorylation, and can be explained by a change in the operation of potassium channels, which can explain the development of cardiovascular pathology under the action of ionizing radiation.
研究目的研究掺入 137Cs 对白鼠心肌能量代谢的影响。 材料和方法。这项研究以 8 只雄性白鼠为对象,分为 2 个实验组,每组喂食受 137Cs 污染的产品 7 天。采用极谱法研究心肌组织制备物在内源性底物、添加外源性琥珀酸和谷氨酸以及添加氧化磷酸化解偶联剂 2,4-二硝基苯酚情况下的耗氧量。结果发现,氧化磷酸化解偶联剂导致内源底物呼吸速率增加。与此同时,内源底物的数量没有发生统计学意义上的显著变化。 结论所揭示的实验动物心肌能量生成障碍是由氧化磷酸化解偶联引起的,可以用钾离子通道的运行变化来解释,这可以解释电离辐射作用下心血管病变的发生。
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引用次数: 0
Ultrasound predictors of outcome of traumatic brain injury 脑外伤结果的超声波预测因素
Pub Date : 2024-03-30 DOI: 10.51523/2708-6011.2024-21-1-05
D. P. Markevich, N. E. Viktorovich, T. V. Denisenko
   Objective. To evaluate the possibility of ultrasound monitoring of optic nerve sheath diameter and blood flow velocity in cerebral arteries as predictors of craniocerebral trauma outcome.   Materials and methods. 35 patients with traumatic brain injury (TBI) were produced ultrasound monitoring of the optic nerve sheath diameter (ONSD) and blood flow velocity (BFV) in the middle cerebral artery (AMC) before surgery and for 10 days after craniotomy. A comparative analysis of blood flow in the A MC and ONSD was carried out between groups of patients with a favorable (group 1) and unfavorable (group 2) outcome of TBI.   Results. Between the groups of patients with different outcome`s TBI, significant differences were revealed in the diameter of the optic nerve sheaths at the preoperative period and in the diastolic blood flow velocity in the MCA on the 9th day after surgery. In group 1, the ONSD was 4.7 [4.5; 5.1] mm, and in group 2 – 5.6 [5.4; 6] mm, p=0.003. On the 9th day after surgery, BFV at diastole in group 1 was 43.9 [38.7; 49.4] cm/sec, in group 2 – 28.7 [24.8; 36.7] cm/sec, p = 0.001. For ONSD in the preoperative period as a predictor of unfavorable outcome of TBI AUC=0.83, Se=88.8%, Sp=61.2%. For diastolic BFV in the AMC on the 9th day after surgery – AUC = 0.84, Se=93%, Sp = 52 %.   Conclusion. In patients with traumatic brain injury, ultrasound examination shows that the diameter of the optic membranes before surgery is ≥5.6 mm and the blood flow velocity in the middle cerebral artery in diastole ≤28.7 cm/sec can be considered as predictors of an unfavorable outcome of TBI.
目的评估用超声波监测视神经鞘直径和脑动脉血流速度作为颅脑创伤结果预测指标的可能性。 材料和方法。在手术前和开颅手术后 10 天内,对 35 名脑外伤(TBI)患者的视神经鞘直径(ONSD)和大脑中动脉血流速度(BFV)进行超声监测。对创伤性脑损伤预后良好(第 1 组)和预后不良(第 2 组)两组患者的 A MC 和 ONSD 血流进行了比较分析。 结果显示在不同结果的创伤性脑损伤患者组之间,术前视神经鞘直径和术后第 9 天 MCA 舒张期血流速度存在显著差异。第一组的视神经鞘直径为 4.7 [4.5; 5.1] 毫米,第二组为 5.6 [5.4; 6] 毫米,P=0.003。术后第 9 天,第 1 组舒张期 BFV 为 43.9 [38.7; 49.4] 厘米/秒,第 2 组为 28.7 [24.8; 36.7] 厘米/秒,P=0.001。术前 ONSD 作为 TBI 不利预后的预测指标,AUC=0.83,Se=88.8%,Sp=61.2%。术后第9天AMC的舒张压BFV--AUC=0.84,Se=93%,Sp=52%。 结论在脑外伤患者中,超声检查显示手术前视神经膜直径≥5.6毫米和大脑中动脉舒张期血流速度≤28.7厘米/秒可被视为脑外伤不利预后的预测因素。
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引用次数: 0
Features of structural and geometric cardiac remodeling in patients with diabetes mellitus depending on chronic kidney disease stages 不同慢性肾病阶段糖尿病患者心脏结构和几何重塑的特点
Pub Date : 2024-03-30 DOI: 10.51523/2708-6011.2024-21-1-06
V. Vasilkova, I. Pchelin, Yana Naumenava, Y. Borovets, Y. Yarets, T. V. Mokhort
   Objective. To study the features of structural and geometric cardiac remodeling in patients with diabetes mellitus (DM) depending on the stage of chronic kidney disease (CKD).   Materials and methods. We examined 499 patients (127 men and 322 women) with type 1 DM (133 people) and type 2 DM (316 people) aged 62 [52;69] years. The comparison group consisted of 65 randomly selected volunteering individuals (54 women and 11 men) without disorders of carbohydrate metabolism and kidney damage aged 59 [46;66] years. The laboratory examination of the patients included the measurement of serum creatinine, eGFR according to the CKD-EPI equation. An echocardiographic investigation was performed to study structural and geometric heart parameters. Left ventricular hypertrophy (LVH) was diagnosed when the left ventricular myocardial mass index (LVMI) exceeded 115 g/m2 in men and 95 g/m2 in women.   Results. LVH was detected in 57.7 % of patients with DM, while in the comparison group – in 35.4 %. The frequency of LVH increased with a decrease in eGFR and was diagnosed in 100 % of cases with CKD 5. In patients with DM, the left ventricular concentric remodeling significantly predominated (29.2%). Multiple linear regression analysis demonstrated the influence of age (ß=0.30, p=0.01) and serum creatinine (ß = 0.15, p < 0.0001) on the LVMI, independent of other factors, which confirms their independent pathogenetic significance.   Conclusion. Thus, patients with DM regardless of the CKD stage have structural and functional changes in the LV myocardium. Regardless of the nitrogen-excretion function of the kidneys, the predominant pattern of LV remodeling is concentric. The study of the features of structural and functional restructuring of the left heart in patients with diabetes should be taken into account in determining the cardiovascular prognosis.
目的根据慢性肾脏病(CKD)的不同阶段,研究糖尿病(DM)患者心脏结构和几何重塑的特征。 材料和方法。我们对 499 名 1 型糖尿病(133 人)和 2 型糖尿病(316 人)患者(127 名男性和 322 名女性)进行了检查,他们的年龄为 62 [52;69] 岁。对比组包括 65 名随机挑选的志愿者(54 名女性和 11 名男性),他们没有碳水化合物代谢紊乱和肾脏损伤,年龄为 59 [46;66] 岁。患者的实验室检查包括血清肌酐和根据 CKD-EPI 公式计算的 eGFR 测量。超声心动图检查用于研究心脏结构和几何参数。当左心室心肌质量指数(LVMI)男性超过 115 克/平方米,女性超过 95 克/平方米时,即可诊断为左心室肥厚(LVH)。 结果在57.7%的糖尿病患者中发现了左心室肥厚,而在对比组中则为35.4%。左心室肥厚的发生率随着 eGFR 的下降而增加,在 CKD 5 患者中,100% 的患者都被诊断出左心室肥厚。 在 DM 患者中,左心室同心重塑明显占多数(29.2%)。多元线性回归分析表明,年龄(ß=0.30,p=0.01)和血清肌酐(ß=0.15,p < 0.0001)对左心室指数的影响与其他因素无关,这证实了它们的独立致病意义。 结论因此,DM 患者无论处于哪个 CKD 阶段,其左心室心肌的结构和功能都会发生变化。无论肾脏排氮功能如何,左心室重塑的主要模式都是同心的。在判断心血管疾病的预后时,应考虑研究糖尿病患者左心结构和功能重构的特点。
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引用次数: 0
Unresolved issues in the use of imaging techniques in COVID-19-associated lesions of the stomach intestine 在胃肠COVID-19相关病变中使用成像技术的未决问题
Pub Date : 2024-03-29 DOI: 10.51523/2708-6011.2024-21-1-03
А. М. Yurkovskiy, M. A. Boika
   Objective. To systematize and analyze data on the use of imaging techniques in COVID-19-associated gastric and intestinal lesions.   Materials and methods. An analysis of publications in PubMed, EMBASE and Web of Science systems was carried out in the period 2020-2023, describing the use of imaging techniques in patients with a confirmed diagnosis of COVID-19-associated gastrointestinal lesions.   Results. The most frequent signs of COVID-19-associated gastric and intestinal lesions on abdominal imaging were identified, their incidence and approximate diagnostic significance were evaluated.   Conclusion. The use of computed tomography and ultrasonography for the diagnosis of COVID-19-associated gastrointestinal lesions is hampered by the lack of clear ideas regarding the sensitivity, specificity, and prognostic value of the previously described radiologic signs of gastrointestinal lesions. In addition, there is no clear algorithm for the use of imaging methods in COVID-19-associated abdominal pain syndrome. The solution of these issues will optimize the use of imaging methods and reduce the time of diagnostic search.
目的系统整理和分析在 COVID-19 相关胃肠病变中使用成像技术的数据。 材料和方法。对 2020-2023 年间在 PubMed、EMBASE 和 Web of Science 系统中发表的、描述在确诊为 COVID-19 相关胃肠道病变的患者中使用成像技术的文献进行分析。 研究结果确定了COVID-19相关胃肠道病变在腹部成像中最常见的体征,评估了其发生率和大致的诊断意义。 得出结论。由于对之前描述的胃肠道病变放射学征象的敏感性、特异性和预后价值缺乏明确的认识,因此使用计算机断层扫描和超声波检查诊断 COVID-19 相关胃肠道病变受到了阻碍。此外,在 COVID-19 相关腹痛综合征中使用成像方法也没有明确的算法。这些问题的解决将优化影像学方法的使用并缩短诊断搜索的时间。
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引用次数: 0
Clinical and functional characteristics of patients with chronic dizziness 慢性头晕患者的临床和功能特征
Pub Date : 2024-03-29 DOI: 10.51523/2708-6011.2024-21-1-04
N. V. Halinouskaya, O. V. Nak, A. V. Skachkou
   Objective. To form a clinical and functional characterization of patients with chronic dizziness.   Materials and methods. A single one-stage cohort study of 32 patients with chronic dizziness (CD), among them 26 women and 6 men, mean age - 49 [36.5; 51.5] years, was conducted. Patients were examined by objective neurologic examination, laboratory (general and biochemical blood tests) and instrumental (radiography, magnetic resonance imaging (MRI), ultrasound) methods were used during the study. Barany’s test was also performed, and neuropsychological testing was performed. The data were processed using descriptive statistical methods of the application package “Statistica”, 10.0.   Results. During the examination, patients complained of dizziness (100 %) and shakiness when walking (84 %), provoked mainly by intermittent visual stimuli (31 % each). Subjective neurological deficit in patients with CD was caused by kinesthetic sensations of instability (34 %), accompanied by decreased attention and memory (28 %). Objectively, the phase of optokinetic nystagmus in Barany’s test lengthened in the studied group - 190 [170; 225] s and the time of balance retention in Romberg’s pose decreased - 3 [2; 5] s. CD patients were characterized by high personality anxiety - 53 [44; 53] points and autonomic imbalance according to the questionnaire of A.M. Vein - 42 [40; 44] points. We did not reveal a connection of CD with structural anomalies, pathology of brachiocephalic vessels.   Conclusion. The clinical and functional status of CD patients was characterized by the absence of focal lesions of the nervous system and a small number of concomitant diseases causing vertigo. At the same time, the patients’ subjective sensations underlying the perception of non-existent stimuli led to impaired maintenance of vertical body position and, in turn, formed an anxiety disorder.
目的对慢性头晕患者的临床和功能特征进行分析。 材料和方法。对 32 名慢性头晕(CD)患者(其中 26 名女性和 6 名男性,平均年龄 49 [36.5; 51.5]岁)进行了单阶段队列研究。研究期间对患者进行了客观的神经系统检查,并使用了实验室(一般和生化血液测试)和仪器(射线照相术、磁共振成像(MRI)、超声波)方法。此外,还进行了巴拉尼测试和神经心理学测试。数据使用 "Statistica "10.0 应用软件包的描述性统计方法进行处理。 结果在检查过程中,患者主诉头晕(100%)和走路颤抖(84%),主要由间歇性视觉刺激引起(各占 31%)。CD 患者的主观神经功能缺陷是由不稳定的运动感觉引起的(34%),同时伴有注意力和记忆力下降(28%)。客观上,在研究组中,巴拉尼试验的视运动眼震阶段延长了 190 [170; 225] 秒,罗姆伯格姿势的平衡保持时间缩短了 3 [2; 5] 秒。根据 A.M. Vein 的问卷调查,CD 患者的性格焦虑程度高 - 53 [44; 53] 分,自律神经失衡 - 42 [40; 44] 分。我们没有发现 CD 与肱动脉血管的结构异常和病变有关。 结论CD 患者的临床和功能状态的特点是神经系统无局灶性病变,引起眩晕的并发症较少。同时,患者对不存在的刺激的主观感觉导致身体垂直位置的维持能力受损,进而形成焦虑症。
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引用次数: 0
New possibilities of artificial intelligence in medicine: a narrative review 人工智能在医学中的新可能性:叙述性综述
Pub Date : 2024-03-28 DOI: 10.51523/2708-6011.2024-21-1-01
A. Litvin, I. Stoma, T. Sharshakova, S. B. Rumovskaya, A. A. Kyovalev
   The purpose of the narrative review is to provide a descriptive analysis of the emerging capabilities of artificial intelligence (AI) to improve the diagnosis, prevention and treatment of various diseases.   The article discusses which modern AI tools can be used in clinical practice, healthcare organization and medical education. The paper considers various aspects of medical AI systems, which are mainly computer support systems for medical decision-making in the process of clinical work. Much attention is paid to the possibilities of generative AI in medicine. Potential applications of AI in clinical practice have been investigated, highlighting promising prospects for both practitioners and their patients. The limitations associated with the use of AI in various fields of medicine are described, and possible ways of solving them are suggested. The problems of information security and ethical constraints associated with the introduction of AI are outlined. The broad integration of AI into public health will enhance clinical and management decision support, speed up disease diagnosis, and improve the overall quality and accessibility of healthcare services.
这篇叙述性综述旨在对人工智能(AI)在改善各种疾病的诊断、预防和治疗方面的新兴能力进行描述性分析。 文章讨论了哪些现代人工智能工具可用于临床实践、医疗机构和医学教育。文章考虑了医疗人工智能系统的各个方面,主要是临床工作过程中医疗决策的计算机支持系统。本文十分关注生成式人工智能在医学中的应用。对人工智能在临床实践中的潜在应用进行了研究,强调了对从业人员及其患者都大有可为的前景。文中阐述了在医学各领域使用人工智能的局限性,并提出了解决这些局限性的可行方法。还概述了与引入人工智能相关的信息安全和伦理限制问题。将人工智能广泛融入公共卫生领域将加强临床和管理决策支持,加快疾病诊断,提高医疗服务的整体质量和可及性。
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引用次数: 0
Comparative evaluation of the biological activity of quercetin-like compounds 槲皮素类化合物生物活性的比较评估
Pub Date : 2024-03-28 DOI: 10.51523/2708-6011.2024-21-1-02
D. O. Tsymbal
   Objective. To determine the degree of manifestation of antioxidant, oncoprotective, anti-inflammatory properties of quercetin-like compounds of a number of flavonoids based on a comparative analysis of the complexing activity of oxygen-containing functional groups.   Materials and methods. Analysis and systematization of literary data, a rationalistic method of modeling the properties of molecular systems.   Results. The expediency of determining the structural identity of separate sections of molecules of various flavonoids for the subsequent determination of the degree of correlation of their biological properties is shown.   Conclusion. Comparison of biological properties of substances of plant origin in combination with application of the latest extraction methods will help to accelerate drug development at the stage of obtaining a new active substance.
目的根据含氧官能团络合活性的比较分析,确定多种黄酮类化合物中槲皮素类化合物的抗氧化、肿瘤保护和抗炎特性的表现程度。 材料和方法对文献资料进行分析和系统化,采用合理的方法建立分子系统特性模型。 结果。结果表明,确定各种黄酮类化合物分子独立部分的结构特征,对于随后确定其生物特性的相关程度十分有利。 结论比较植物来源物质的生物特性,并结合应用最新的提取方法,将有助于在获得新活性物质的阶段加快药物开发。
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引用次数: 0
Predictors of an unfavorable outcome in patients with severe pneumonia against the background of COVID-19 infection 以 COVID-19 感染为背景的重症肺炎患者不良预后的预测因素
Pub Date : 2024-01-05 DOI: 10.51523/2708-6011.2023-20-4-10
D. P. Salivonchyk, T. A. Kurman
Objective. To determine the predictors of an unfavorable outcome in patients with severe pneumonia against the background of COVID-19 infection.Materials and methods. A retrospective analysis of the case histories of deceased patients (control group, n = 40) for January 2021 (a continuous sample — 15.01.21–31.01.21) and surviving patients for the same period (n = 40) with a confirmed PCR diagnosis of coronavirus infection, who were on inpatient treatment at the state healthcare institution “Gomel City Clinical Hospital No. 3” (SHI “GCCH №3”) in Gomel. The Ethical Committee of SHI “GCCH №3” found no violations contradicting ethics and morality in conducting the study. Treatment of patients, assessment of the severity of the condition were carried out according to modern protocols for the diagnosis and treatment of COVID-19 infection, approved by the Ministry of Health of the Republic of Belarus (No. 1195 of 11.11.2020). The group of surviving patients was represented by 11 men and 29 women versus 24 men and 16 women in the control group (p < 0.05).According to computed tomography of chest organs (CT CO), all 80 patients had signs of bilateral viral pneumonia characteristic of COVID-19. When processing and describing CT data, a semi-quantitative scale was used to estimate the volume of infiltration and consolidation zones of the lungs, recommended by temporary protocols. The total volume of lung damage in COVID-19 infection (“frosted glasses”, “cobblestone pavement”, “consolidation sites”) was > 55% in both groups, p > 0.05. CT CO was performed on Somatom Emotion 6 (Siemens) with a spiral type of scanning.Patients of both groups were comparable in age, concomitant comorbid pathology: coronary heart disease (CHD), arterial hypertension (AH), diabetes mellitus (DM), etc., however, they had differences in gender (the proportion of males prevailed in the group of deceased). A feature of the study was a solid sample among deceased patients. Taking into account the group differences by gender, in this study, an additional comparison of the results by gender was carried out. Results. The course of COVID-19 infection at the stationary stage is characterized by large-scale negative clinical dynamics, fever, “explosion” of acute phase indicators, thrombosis, distress syndrome with a drop in saturation and unfavorable outcomes. The indicators obtained using the NEWS-2, SHOCK-COVID scales (scales for predicting the severity of the clinical course of coronavirus infection) in severe patients, although they indicate a worsening of the patient’s clinical condition, but rather late, when the “cytokine storm”, powerful inflammation, thrombosis, significant damage to lung tissue already dominate among clinical syndromes, the decrease in saturation and the effectiveness of drug therapy is significantly limited.Conclusion. According to the results of the study, it is recommended to divide patients into groups of moderate and high risk of adverse outcome based on clini
目的确定以 COVID-19 感染为背景的重症肺炎患者不良预后的预测因素。对 2021 年 1 月(连续抽样 - 21 年 1 月 15 日至 21 年 1 月 31 日)死亡患者(对照组,n = 40)和同期存活患者(n = 40)的病历进行回顾性分析,这些患者均在戈梅利市国立医疗机构 "戈梅利市第三临床医院"(SHI "GCCH №3")接受住院治疗,并经 PCR 确诊为冠状病毒感染。戈梅利市第三临床医院 "伦理委员会认为,在进行这项研究时没有违反伦理道德的行为。对患者的治疗和病情严重程度的评估均按照白俄罗斯共和国卫生部批准的 COVID-19 感染诊断和治疗现代方案(2020 年 11 月 11 日第 1195 号)进行。根据胸部器官计算机断层扫描(CT CO)结果,所有 80 名患者均出现了 COVID-19 型病毒性肺炎的双侧症状。在处理和描述 CT 数据时,根据临时方案的建议,使用了半定量标尺来估算肺部浸润和固缩区的体积。两组感染 COVID-19 的肺损伤总体积("磨砂玻璃"、"鹅卵石路面"、"合并部位")均大于 55%,P > 0.05。两组患者在年龄、并发症:冠心病(CHD)、动脉高血压(AH)、糖尿病(DM)等方面具有可比性,但在性别方面存在差异(死亡组中男性占多数)。这项研究的一个特点是,死亡患者的样本非常扎实。考虑到不同性别群体的差异,本研究还对不同性别的结果进行了比较。研究结果COVID-19 感染在静止期的病程特点是大规模的临床负动态变化、发热、急性期指标 "爆炸"、血栓形成、饱和度下降的窘迫综合征以及不利的预后。使用 NEWS-2 和 SHOCK-COVID 量表(用于预测冠状病毒感染临床病程严重程度的量表)得出的重症患者指标虽然表明患者的临床病情恶化,但却相当晚,此时 "细胞因子风暴"、强大的炎症、血栓形成、肺组织的明显损伤已在临床综合征中占主导地位,饱和度下降,药物治疗的效果明显受限。根据研究结果,建议根据临床、仪器、实验室数据的动态变化,将患者分为不良后果中度风险组和高度风险组。对于中度风险患者,在大多数情况下,方案治疗足以稳定一般病情。对于不良后果的患者,这种疗法不能抑制肺组织损伤的发展,临床和实验室动态都是负面的,这就需要做出额外的决定,改变药物治疗的剂量,以防止出现致命的后果。
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引用次数: 0
Mechanical and structural properties of rat and human lymphocytes after the exposure of the whole blood to X-rays in vitro 大鼠和人类淋巴细胞在体外将全血暴露于 X 射线后的机械和结构特性
Pub Date : 2024-01-05 DOI: 10.51523/2708-6011.2023-20-4-12
I. А. Chelnokova, N. M. Shkliarava, N. Yegorenkov, M. Starodubtseva
Objective. By the means of atomic force microscopy to determine the changes in the parameters of the structural and mechanical properties of peripheral blood lymphocytes induced by the irradiation of whole blood by X-rays and identifying the possibility of assessing a state and radiation-induced lymphocyte death programs by analyzing a set of such parameters.Materials and methods. Whole blood of rats and humans was irradiated with X-rays (1–100 Gy) in vitro. Lymphocytes were isolated from the blood after a day of storage, placed on glass slides, fixed with glutaraldehyde and dried. The study of structural and mechanical properties was carried out with the help of atomic force microscope Bruker Bioscope Resolve in Peak Force QNM mode in air. For the sets of AFM parameters, which included elastic modulus, adhesion force, cell surface roughness and cell sizes, a k-mean clustering of data was carried out for the studied experimental groups.Results. The X-ray irradiation of the blood caused changes in the structural and mechanical properties of lymphocytes measured by AFM at the nanoscale. Clustering analysis of the sets of AFM parameters revealed clusters with similar structure in each experimental group (humans, 6and 16-month rats). The studied four clusters were associated with cell states and cell death programs: non-activated cells, activated cells with increased stiffness, apoptotic cells with reduced stiffness, and cells dying via programs other than apoptotic ones with increased stiffness. Each cluster (cell type) with a specific set of AFM parameters was represented differently in the blood lymphocyte population, depending on the dose of X-rays.Conclusion. The set of ACM parameters of lymphocytes including elastic modulus, adhesion force, roughness, and cell sizes, can be helpful for automatically determining the state and death program of lymphocytes after the local irradiation of humans with the involvement of peripheral blood (for example, after radio-therapeutic causes).
研究目的通过原子力显微镜确定 X 射线照射全血诱导的外周血淋巴细胞结构和机械特性参数的变化,并通过分析一组此类参数确定评估状态和辐射诱导的淋巴细胞死亡程序的可能性。在体外用 X 射线(1-100 Gy)照射大鼠和人类的全血。储存一天后从血液中分离出淋巴细胞,放在玻璃载玻片上,用戊二醛固定并干燥。在空气中使用原子力显微镜 Bruker Bioscope Resolve 的峰值力 QNM 模式进行结构和机械特性研究。对于原子力显微镜参数集,包括弹性模量、粘附力、细胞表面粗糙度和细胞大小,对所研究的实验组进行了 k-mean 数据聚类。血液经 X 射线照射后,用原子力显微镜测量的淋巴细胞的结构和机械特性在纳米尺度上发生了变化。对原子力显微镜参数集的聚类分析显示,每个实验组(人类、6 个月大鼠和 16 个月大鼠)都有结构相似的群集。所研究的四个聚类与细胞状态和细胞死亡程序有关:非活化细胞、活化细胞(硬度增加)、凋亡细胞(硬度降低)和通过凋亡程序以外的程序死亡的细胞(硬度增加)。根据 X 射线剂量的不同,血液淋巴细胞群中具有一组特定 AFM 参数的每个群组(细胞类型)的表现也不同。淋巴细胞的 ACM 参数集(包括弹性模量、粘附力、粗糙度和细胞大小)有助于自动确定人体外周血局部照射后(如放射治疗后)淋巴细胞的状态和死亡程序。
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