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Diversity of antibacterial and antifungal activities of Thymus kotschyanusessential oil collected from fourteen regions of Iran 来自伊朗14个地区的百里香精油的抗菌和抗真菌活性多样性
Pub Date : 2020-09-15 DOI: 10.32592/jbirjandunivmedsci.2020.27.3.106
Fatemeh Elahian, A. Yazdinezhad, N. Tusi, Z. Nouri, A. Mirzaei
Background and Aim: Thymus kotschyanus is one of the most famous medicinal plants in Iran from the mint family and it has many applications in traditional medicine, such as relieving the symptoms of colds and coughs and relieving some gastrointestinal diseases. It also has antibacterial and antifungal effects. This study was performed to investigate the diversity of antibiotic effects of this plant. Materials and Methods: Essential oils of fourteen different ecotypes of Thymus kotschyanus were extracted by using the Clevenger apparatus. After oil analyses with GC-MS device, the minimum inhibitory concentration of growth and also the minimum lethal concentration of 7 types of bacteria and 2 types of fungi were measured by microdilution method in the range of 0.01 to 5.12 mg/ml. Results: Oxygenated monoterpenes were the major fraction (64.60–90.60%) of the oils, and thymol and carvacrol were considered as the most abundant constituents (27.23–75.55%). The amount and concentration of these two phenolic substances in thyme essential oil were directly related to antibacterial and antifungal effects. The antibacterial and antifungal activity of the essential oils ranged from 0.24 to 5.12 and 0.08 to 0.96 mg/ml, respectively. The most active antimicrobial activity is related to the essential oil of Salmas and Nodoshan ecotypes and the least activity was seen in Rudbar ecotype. Conclusion: Geographical characteristics of the place where plants grow had a significant role in the type and amount of compounds in the essential oil of the plant. In this regard, different biological effects and antibacterial and antifungal properties can occur from each ecotype.
背景与目的:麝香(thyymus kotschyanus)是伊朗薄荷科最著名的药用植物之一,在传统医学中有许多用途,如缓解感冒和咳嗽症状,缓解一些胃肠道疾病。它还具有抗菌和抗真菌的作用。本研究旨在探讨这种植物的抗生素作用的多样性。材料与方法:采用Clevenger仪器提取14种不同生态型胸草精油。经气相色谱-质谱仪分析后,采用微量稀释法测定了7种细菌和2种真菌在0.01 ~ 5.12 mg/ml范围内的最低生长抑制浓度和最低致死浓度。结果:含氧单萜化合物含量最高(64.60 ~ 90.60%),百里香酚和香芹酚含量最高(27.23 ~ 75.55%)。百里香精油中这两种酚类物质的含量和浓度与抑菌抑菌效果直接相关。其抑菌活性为0.24 ~ 5.12 mg/ml,抗真菌活性为0.08 ~ 0.96 mg/ml。其抑菌活性最高的是Salmas和Nodoshan生态型精油,最低的是Rudbar生态型精油。结论:植物生长地的地理特征对植物挥发油中化合物的种类和含量有重要影响。在这方面,每个生态型可以产生不同的生物效应和抗菌和抗真菌特性。
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引用次数: 1
Application of mesoporous silica nanoparticles for drug delivery to cancer cells 介孔二氧化硅纳米粒子在癌症细胞给药中的应用
Pub Date : 2020-09-15 DOI: 10.32592/JBIRJANDUNIVMEDSCI.2020.27.3.101
B. Malaekeh-Nikouei, Mohammad Yahya Hanafi-Bojd
Cancer is one of the main causes of death worldwide. Chemotherapy is the most common method for cancer therapy which represent non-specific side effects on normal cells and tissues and drug resistance in cancer cells. There are two main mechanisms for Multi Drug Resistance (MDR) in cancer cells including: drug efflux pump and activation of anti-apoptotic pathways. Cancer chemotherapy disadvantages can be overcome by using nanoparticulate drug delivery systems like Mesoporous Silica Nanoparticles (MSNs) that have been used as drug delivery system since 2001. The present review included synthesis, targeted (active or passive) drug delivery to cancer cells, co-delivery of anticancer drugs and siRNA by MSNs and its toxicity. This review revealed that MSNs are good candidate for drug delivery to cancer cells due to its unique properties including: controllable pore and particle sizes, thermal and chemical stability, modifications of outer and inner surfaces of nanoparticles for drug and siRNA loading, attachment of ligand for targeted drug delivery, high drug loading capacity and controlled drug release, biocompatibility and biodegradation in aqueous medium.
癌症是世界范围内死亡的主要原因之一。化疗是最常用的癌症治疗方法,它对正常细胞和组织有非特异性的副作用,对癌细胞有耐药性。肿瘤细胞发生多药耐药的机制主要包括药物外排泵和抗凋亡通路的激活。癌症化疗的缺点可以通过使用纳米颗粒药物传递系统来克服,如介孔二氧化硅纳米颗粒(MSNs),自2001年以来一直用作药物传递系统。本文综述了纳米微球的合成、靶向(主动或被动)给药、抗癌药物与siRNA的共递送及其毒性。本文综述表明,MSNs具有孔径和粒径可控、热稳定性和化学稳定性、纳米颗粒内外表面修饰可用于载药和siRNA、配体附着可靶向载药、高载药量和药物释放控制、在水介质中的生物相容性和生物降解等特点,是肿瘤细胞药物递送的良好候选者。
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引用次数: 0
Brucellosis Spondylodiscitis: A case report 布鲁氏菌病性脊柱炎1例
Pub Date : 2020-09-15 DOI: 10.32592/JBIRJANDUNIVMEDSCI.2020.27.3.109
Nasrin Milani, R. Ahmadi
Brucellosis is an endemic disease in Iran that is transmitted from animal to human. The clinical manifestations of brucellosis are nonspecific and its complications involve bones and joints. Brucellosis osteomyelitis can mimic the manifestations of neoplasms; therefore, it cannot readily be diagnosed in some cases. Under such circumstances, high incidence can be a helpful factor. We reported a 49-year-old man patient who presented with chronic musculoskeletal pain in the lower back. Initially, he was treated for osteoarthritis due to several negative serological tests for brucellosis. He was referred to a specialized clinic with no recovery achievement after 5 months treatment. The musculoskeletal pain together with the patient’s occupation (animal husbandry), was resulted in a high clinical suspicion of brucellosis. Consequently, the patient underwent another serological test and Magnetic resonance imaging (MRI). He was diagnosed with brucellosis-induced spondylodiscitis by positive serology result and bone involvement on MRI. Regular treatment was then started, which led to clinical and radiological improvement at the end. With regard to chronic symptoms of the disease and despite the negative results of serological tests, it is recommended that radiological diagnostic methods such as MRI should be adopted in cases where there is a clinical suspicion of brucellosis.
布鲁氏菌病是伊朗的一种地方病,由动物传染给人类。布鲁氏菌病的临床表现是非特异性的,其并发症涉及骨骼和关节。布鲁氏菌病骨髓炎可以模仿肿瘤的表现;因此,在某些情况下无法轻易诊断。在这种情况下,高发病率可能是一个有益因素。我们报告了一名49岁的男性患者,他表现为下背部慢性肌肉骨骼疼痛。最初,由于几次布鲁氏菌病血清学检测呈阴性,他接受了骨关节炎治疗。他被转诊到一家专科诊所,经过5个月的治疗后没有恢复。肌肉骨骼疼痛加上患者的职业(畜牧业),导致临床高度怀疑布鲁氏菌病。因此,患者接受了另一项血清学检查和核磁共振成像(MRI)。血清学结果阳性,MRI检查显示其为布鲁氏菌病引起的椎间盘炎。然后开始定期治疗,最终导致临床和放射学的改善。关于该疾病的慢性症状,尽管血清学检测结果呈阴性,但建议在临床怀疑布鲁氏菌病的情况下,应采用MRI等放射学诊断方法。
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引用次数: 0
Evaluation of sexual function and its related factors in women with breast cancer undergoing chemotherapy referred to Iran-Mehr Medical Center in Birjand, 2018 2018年Birjand Iran-Mehr医疗中心转介乳腺癌化疗妇女性功能及其相关因素评估
Pub Date : 2020-08-05 DOI: 10.32592/jbirjandunivmedsci.2020.27.4.105
Background and Aim: The Breast cancer is very common. These patients develop sexual dysfunction following chemotherapy. The aim of this study was to evaluate the effect of chemotherapy in breast cancer patients on their sexual function.Materials and Methods: This descriptive-analytical cross-sectional study was performed on patients with breast cancer referred to Iran-Mehr Medical Center in winter 2018 undergoing chemotherapy. 119 patients were enrolled in the study under census. The Rosen’s Sexual Function Questionnaire was used to collect data. Data were analyzed by using SPSS (Version 16) and Smirnov-Kolmogorov, Kruskal-Wallis and Mann-Whitney tests at the significant level of (P<0.05).Results: In terms of sexual function, the lowest score was 2.40 and the highest score was 14.90. In the study of sexual function components, patients were in the worst condition in terms of pain, 0.84±0.75 and humidity 0.85±0.73. The mean scores of other components included orgasm 1.13±0.64, irritability 1.05±0.84, satisfaction 1.23±0.30 and sexual desire 1.66±0.66, respectively. The only factor affecting sexual function Location, age of marriage and age of patients.Conclusion: The score of sexual function was less than the minimum; the most disorders were recorded for the components of pain and humidity. Factors affecting sexual function were included: location, years of menopause, type of treatment, age of patients and years of marriage. It is recommended that the sexual status of breast cancer patients be evaluated before and during treatment and that the necessary training be provided to inform patients about this disorder and the necessary treatments to improve sexual function.
背景与目的:乳腺癌是一种非常常见的疾病。这些患者在化疗后出现性功能障碍。本研究的目的是评估化疗对乳腺癌患者性功能的影响。材料与方法:本描述性分析横断面研究对2018年冬季转介到伊朗梅尔医疗中心接受化疗的乳腺癌患者进行了研究。119名患者在人口普查的情况下参加了这项研究。使用罗森性功能问卷收集数据。数据采用SPSS (Version 16)和Smirnov-Kolmogorov、Kruskal-Wallis、Mann-Whitney检验,在显著水平(P<0.05)下进行分析。结果:在性功能方面,最低分2.40分,最高分14.90分。在性功能分项研究中,患者疼痛最差,为0.84±0.75,湿度最差,为0.85±0.73。其他各项的平均得分分别为高潮(1.13±0.64)、烦躁(1.05±0.84)、满意度(1.23±0.30)和性欲(1.66±0.66)。影响性功能的唯一因素是地点、结婚年龄和患者年龄。结论:患者性功能评分低于最低分;疼痛和湿度的组成部分记录了最多的紊乱。影响性功能的因素包括:地点、绝经年数、治疗类型、患者年龄和结婚年数。建议在治疗前和治疗期间对乳腺癌患者的性状况进行评估,并提供必要的培训,使患者了解这种疾病和改善性功能的必要治疗。
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引用次数: 2
COVID-19 pandemic: Challenges and approaches in blood transfusions COVID-19大流行:输血的挑战和方法
Pub Date : 2020-08-05 DOI: 10.32592/jbirjandunivmedsci.2021.28.1.100
مقد فرشید عابدی امیرحسین رستگا ستاره خیراندیش ابراهیم میری
One of the goals of the Iranian Blood Transfusion Organization is to provide adequate healthy blood and reduce the risk of various viral and bacterial transmission infections. With the removal of alternative blood donation, all blood units and blood products are provided through voluntary blood donation in Iran. The Blood Transfusion Organization screens the donated blood according to standard guidelines to ensure blood recipients and physicians of providing healthy and pathogen-free components. With the emergence of novel pathogens, such as the pandemic of the COVID-19 virus, despite Iranchr('39')s self-sufficiency in blood supply and blood products, the number of blood donors has decreased significantly since there is a lack of comprehensive information on pathophysiology and virus transmission ways. Moreover, the existence of some shortages in screening programs can cause problems. Therefore, this study was performed to review the studies conducted investigating this emerging virus regarding blood transfusions and the supply of blood components worldwide.
伊朗输血组织的目标之一是提供充足的健康血液,减少各种病毒和细菌传播感染的风险。随着替代献血的取消,伊朗所有血液单位和血液制品都是通过自愿献血提供的。输血组织根据标准准则筛选捐献的血液,以确保接受血液的人和医生提供健康和无病原体的成分。随着新型冠状病毒感染症(COVID-19)大流行等新型病原体的出现,虽然伊朗在血液供应和血液制品方面实现了自给自足,但由于缺乏对病理生理和病毒传播途径的全面了解,献血者数量大幅减少。此外,筛查程序中存在的一些不足可能会造成问题。因此,本研究旨在回顾在世界范围内就输血和血液成分供应方面调查这一新兴病毒的研究。
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引用次数: 0
Evaluation of the position of mandibular third molar hidden teeth and its effect on second adjacent molar teeth in panoramic radiography in patients referring to Birjand Dental School in 2018-19 2018-19年Birjand Dental School患者下颌第三磨牙隐藏牙位置及对第二邻磨牙的影响
Pub Date : 2020-07-25 DOI: 10.32592/jbirjandunivmedsci.2020.27.3.107
Hanieh Arjmand monfared, M. Khani, Gholamreza Sharifzadeh, Seyed Ramin Nourbakhsh
Background and Aim: The third molar tooth lies with symptoms such as periodontal problems, caries, crowding, root resorption, cyst and tumor formation of the adjacent second molar. This study was to evaluate the position of mandibular third molar teeth and its effect on second adjacent molar teeth.Materials and Methods: Panoramic radiography was obtained from 264 patients with mandibular third molar hidden teeth referred to the Birjand School of Dentistry in 2018. The material and direction of their placement and the vertical position of the third molar tooth (based on the PELL & Gregory classification) and its placement angle (based on Winter classification) were determined. Also, the prevalence of distal caries, external root resorption, the amounts of displacement, t inflammatory lesions and the cystic was examined in the adjacent second molar tooth. Data were analyzed using SPSS software (Version 19), and Chi-square statistical test, p-values less than 0.05 were considered as statistically significant.Results: The data from this study showed that most of the wisdom hidden teeth were in Class B and III of Pell and Gregory classification, had Mesial angle based on Winter classification. In 20.8% of patients with caries, there was 3% root canal resorption and 1.1% displacement of the second molar tooth, while no cases of inflammatory and cystic lesions in the second molar tooth were found due to the hidden third molar tooth. The Mesial and horizontal angles of impacted wisdom teeth were associated with increased risk of caries and root resorption of the second molar. Also, Class B's third molar teeth increased caries in second molar teeth.Conclusion: Most pathological problems were observed in Mesial, horizontal, and class B impaction. According to the observed relationship, it seems that the angle and depth of the hidden third molar should be taken into account c when deciding whether or not to extract it.
背景与目的:第三磨牙存在牙周问题、龋齿、拥挤、牙根吸收、相邻第二磨牙囊肿和肿瘤形成等症状。本研究旨在探讨下颌第三磨牙的位置及其对相邻第二磨牙的影响。材料与方法:对2018年Birjand牙科学院就诊的264例下颌第三磨牙隐牙患者进行全景x线摄影。确定其放置的材料和方向以及第三磨牙的垂直位置(基于PELL & Gregory分类)和放置角度(基于Winter分类)。同时,对相邻第二磨牙的远端龋患病率、外根吸收、移位量、炎性病变和囊性牙进行了检查。数据采用SPSS软件(Version 19)进行分析,采用卡方统计检验,p值< 0.05为有统计学意义。结果:本研究数据显示,大部分智齿为Pell和Gregory分类的B类和III类,在Winter分类的基础上具有中位角。20.8%的龋齿患者根管吸收3%,第二磨牙移位1.1%,未发现因隐藏第三磨牙导致第二磨牙炎症和囊性病变的病例。阻生智齿的中位角和水平角与第二磨牙龋齿和牙根吸收的风险增加有关。此外,B类的第三磨牙增加了第二磨牙的龋齿。结论:中位嵌塞、水平嵌塞和B级嵌塞的病理问题最多。根据观察到的关系,在决定是否拔牙时,隐藏第三磨牙的角度和深度似乎应该考虑到c。
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引用次数: 1
Relationship between white tea and adipose tissue metabolism: The importance and necessity of future research on the effect of white tea on fat oxidation compared to other teas: Letter to the Editor 白茶与脂肪组织代谢的关系:与其他茶相比,未来研究白茶对脂肪氧化的影响的重要性和必要性:致编辑的信
Pub Date : 2020-07-22 DOI: 10.32592/jbirjandunivmedsci.2020.27.4.109
Obesity is a complex multifactorial disease. The worldwide prevalence of overweight and obesity has doubled since 1980 to an extent that nearly a third of the worldchr('39')s population is now classified as overweight or obese. On the other hand, sports scientists have suggested exercise to prevent further spread of this epidemic. In addition to exercise, the use of natural fat-burning supplements such as green tea was able to attract a lot of people. But recently, white tea in some domestic and foreign research was able to show that like green tea and even better, it will have the potential to burn fat. Therefore, it can be suggested that researchers fill the scientific gap by conducting more research on the comparison of green and white tea and its effects on obesity-related indicators.
肥胖是一种复杂的多因素疾病。自1980年以来,世界范围内超重和肥胖的流行率翻了一番,以至于现在世界上近三分之一的人口被归为超重或肥胖。另一方面,体育科学家建议通过锻炼来防止这种流行病的进一步传播。除了运动,使用天然脂肪燃烧补充剂,如绿茶,能够吸引很多人。但最近,白茶在国内外的一些研究能够表明,像绿茶甚至更好,它会有燃烧脂肪的潜力。因此,可以建议研究人员通过对绿茶和白茶的比较及其对肥胖相关指标的影响进行更多的研究来填补科学空白。
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引用次数: 0
The effect of acceptance and commitment based on the fear of delivery pain- Arandomized educational trial study 基于分娩疼痛恐惧的接受与承诺的影响——随机教育试验研究
Pub Date : 2020-07-01 DOI: 10.32592/jbirjandunivmedsci.2020.27.3.103
F. Zarei, K. Vakilian, A. Majidi
Background and Aim: Pregnancy due to physiological and psychological changes can affect the mental health of mothers.This study aims to investigate the Approach of acceptance and commitment based on the fear of delivery pain.Materials and Methods: This study was a randomized educational trial with a commitment-based treatment approach that was performed on pregnant women in Arak in 2016-2017. After obtaining written consent forms, 42 subjects were selected through the available sampling method. Subjects were grouped in the intervention group (ACT) and in the control group. Eight 90-minute sessions were held for 8 consecutive weeks of counseling Fear of delivery pain at 10 and one month after the intervention was measured in 2 groups by the Likert scale of pain (1-7) score. Data analysis was performed through repeated measure ANOVA by using SPSS (Version 18).Results: Results showed that the mean pain immediately after the intervention was 2.52±2.20 in the intervention group and 4.66±1.80 in the control group. Which is a month later in the intervention group compared to the control group had a significant decrease (3.52±1.81 vs. 4.52±2.30) (P=0.001).Conclusion: In this study, counseling with the approach of acceptance and commitment reduction the fear of delivery pain, which is the most important reason for choosing cesarean section in women, Therefore, it seems that empowering midwives to counseling approaches can be useful to improve maternal care during pregnancy, especially in the administration of delivery preparation classes.
背景与目的:孕期由于生理和心理的变化会影响母亲的心理健康。本研究旨在探讨基于分娩疼痛恐惧的接受与承诺方法。材料与方法:本研究是一项基于承诺治疗方法的随机教育试验,于2016-2017年在阿拉克的孕妇中进行。在获得书面同意后,通过现有抽样方法选择42名受试者。将受试者分为干预组(ACT)和对照组。连续8周进行8次90分钟的咨询,在干预后10个月和1个月用Likert疼痛量表(1-7)评分测量两组分娩疼痛的恐惧程度。数据分析采用SPSS (Version 18)进行重复测量方差分析。结果:干预组即刻疼痛均值为2.52±2.20,对照组为4.66±1.80。其中1个月后干预组与对照组相比有显著降低(3.52±1.81∶4.52±2.30)(P=0.001)。结论:在本研究中,以接受和承诺的方式进行咨询可以减少对分娩疼痛的恐惧,这是妇女选择剖宫产的最重要原因,因此,赋予助产士咨询方法有助于改善妊娠期孕产妇护理,特别是在分娩准备课程的管理方面。
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引用次数: 1
Fauna and frequency of hard ticks of livestock in South Khorasan province in 2018: Short Communication 2018年南呼罗珊省牲畜硬蜱的动物群和频率:短通信
Pub Date : 2020-06-24 DOI: 10.32592/jbirjandunivmedsci.2021.28.2.109
Mohamad Bagher Ghavami, Behrouz Taghilou, Mohamadreza Jamavar, S. Doosti, J. Mohamadi, Zahra Uonesi
Identification of hard tick species and their hosts are essential for the development of control and prevention programs for tick-borne diseases. In this descriptive cross-sectional study, ticks were collected from the sheep, goat, and camel in different regions of South Khorasan province, Iran in 2018 through cluster sampling method. Fauna and frequency of ticks were recorded and analyzed in SPSS software (version?). In total, 977 ticks were collected, such as: Hyalomma spp, including Hy. dromedarii (40.5%), Hy. anatulicum (30.7%), Hy. marginatum (12.5%), Hy. asciaticum (6.8%), Hy. schulzei (4.4%), Hy. detritum (3.2%), and Hy. scupense (1.1%); Rhipicephalus spp, including Rh. bursa (0.3%), Rh. sanguineus (0.2%); and Haemaphysalis spp, including Ha. concina (0.2%), and Ha. punctate (0.1%). The ticks have a high frequency in the region and the identified species in this study were vectors of Crimean Congo Hemorrhagic Fever (CCHF). Moreover, the Hyalomma species is dominant and prevalent throughout the studied region in spring and summer. Therefore the health system of the province has to put into consideration the essential care, education and informing about the CCHF disease.
鉴定硬蜱物种及其宿主对于制定控制和预防蜱传疾病的计划至关重要。在本描述性横断面研究中,采用整群抽样方法于2018年在伊朗南呼罗珊省不同地区的绵羊、山羊和骆驼身上采集蜱虫。用SPSS软件(版本?)记录蜱的区系和频率并进行分析。共捕获蜱类977只,其中:绢毛蜱(40.5%)、阿纳图蜱(30.7%)、边缘蜱(12.5%)、海纹蜱(6.8%)、舒氏蜱(4.4%)、腐斑蜱(3.2%)、细纹蜱(1.1%);鼻头属,包括Rh。法氏囊(0.3%);sanguineus (0.2%);和血蜱,包括Ha。conina (0.2%), Ha。有小点的(0.1%)。该地区蜱虫出现频率高,本研究发现的蜱虫是克里米亚刚果出血热(CCHF)的媒介。此外,在春夏季,Hyalomma种在整个研究区都是优势种和流行种。因此,该省的卫生系统必须考虑到有关CCHF疾病的基本护理、教育和宣传。
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引用次数: 0
Snake venom proteins and coagulopathy caused by snakebite 蛇毒蛋白与蛇咬伤引起的凝血功能障碍
Pub Date : 2020-06-22 DOI: 10.32592/jbirjandunivmedsci.2021.28.2.100
M. Babaie
Snakebite affects around 3 or 4 million humans annually leading to more than 100,000 deaths. Coagulopathy is one of the significant causes of both morbidity and mortality in these patients. Accordingly, it is of utmost importance to diagnose and treat coagulation disorder due to bites; in addition, it is accompanied by various clinical aspects, such as pre-coagulation, fibrinogen coagulation time, fibrinolytic, platelet activation, anticoagulant, thrombotic, and bleeding. The main cause of coagulopathy caused by snakebite is the presence of compounds found in snake venom. These compounds are mostly proteins with enzymatic activity and high stability; moreover, they rapidly react with factors in the blood circulatory system and disrupt their correct functioning. Regarding the snake venom compounds, especially their proteins, it should be mentioned that different snakes' venoms have different proteins, which can have a role in coagulation or anticoagulation depending on its amount. The coagulant proteins are subclassified as clotting factor activators and thrombin-like enzymes. The anticoagulant proteins can prevent blood clotting leading to coagulopathy and include phospholipases A2, fibrinolytic, protein C activator, and L-amino acid oxidase (enzymatic anticoagulants) or C-type lectin-like proteins, three-finger toxins (TFTs), and proteinase inhibitors (nonenzymatic anticoagulants). All of these factors cause coagulopathy due to snake bites, which is a clinically important phenomenon and should be carefully examined; otherwise, it would be difficult to make the diagnosis and treatment process. If untreated, coagulopathy can develop quickly and lead to the patient's death.
蛇咬伤每年影响大约300万或400万人,导致超过10万人死亡。凝血功能障碍是这些患者发病率和死亡率的重要原因之一。因此,诊断和治疗咬伤引起的凝血功能障碍至关重要;此外,它还伴随着各种临床方面,如凝前、纤维蛋白原凝固时间、纤维蛋白溶解、血小板活化、抗凝、血栓形成、出血等。蛇咬伤引起凝血功能障碍的主要原因是在蛇毒中发现的化合物的存在。这些化合物多为具有酶活性和高稳定性的蛋白质;此外,它们与血液循环系统中的因子迅速反应并破坏其正常功能。关于蛇毒化合物,特别是其蛋白质,需要指出的是,不同的蛇毒含有不同的蛋白质,根据其含量的不同,可以有凝血或抗凝血的作用。凝血蛋白分为凝血因子激活剂和凝血蛋白样酶。抗凝蛋白可以防止血液凝固导致凝血功能障碍,包括磷脂酶A2、纤溶酶、蛋白C激活剂和l -氨基酸氧化酶(酶促抗凝剂)或C型凝集素样蛋白、三指毒素(TFTs)和蛋白酶抑制剂(非酶促抗凝剂)。这些因素均可引起蛇咬伤致凝血功能障碍,这是临床上重要的现象,应仔细检查;否则会给诊断和治疗过程带来困难。如果不及时治疗,凝血功能障碍会迅速发展并导致患者死亡。
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引用次数: 2
期刊
Journal of Birjand University of Medical Sciences
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