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Antidiabetic and Antioxidant Activities of Extract of Entandrophragma Cylindricum (Sprague) Leaves in Male Wistar Rats 白茅叶提取物对雄性Wistar大鼠的抗糖尿病和抗氧化活性
Pub Date : 2021-12-01 DOI: 10.52547/rabms.7.3.108
F. Oladoja, Emmanuel Irokosu, O. Kale, T. Olubodun-Obadun
Background & Aims : Entandrophragma cylindricum ( EC) is a tree with a widespread presence in various West African countries. It has wide folkloric use as an anti-sickling, antimalarial, analgesic, anti-inflammatory, and is widely used traditionally in treating diabetes across West Africa. The purpose of this research is to evaluate the antidiabetic potential of the methanolic leaf extract of Entandrophragma cylindricum ( EC) in rats. Materials and Methods : Induction of Diabetes mellitus was done by Streptozotocin (STZ) via intraperitoneal route injection. Animals were apportioned into five groups (n=5) for contrasting the activity of EC at three EC doses (25 mg/kg, 50 mg/kg, 150 mg/kg p.o.) against the standard drug (Glibenclamide) and control groups. Rats having elevated glucose levels above 250 mg/dL were considered diabetic and used for the study. Normoglycemic test, Oral Glucose Tolerance Test (OGTT), STZ-Induced diabetes, in-vitro antioxidant properties of EC extract, and in vivo antioxidant property of the serum were assessed. Results : Phytochemistry revealed the presence of tannins, flavonoids, saponins, alkaloids, terpenoids, deoxy-sugars, and anthraquinones. The three doses of EC (150, 50, and 25 mg/kg) used in the study caused a significant decrease in blood glucose levels in the STZ-induced diabetic rat model. Also, EC (150, 50, and 25 mg/kg) produced a significant (p< 0.001) increase respectively in the body weight from day 0 to day 30 when compared with the untreated diabetic rat. Our results indicated that EC might be a potent free radical scavenger, as it scavenged the 2,2 -diphenyl picrylhydrazyl (DPPH) radical, hydroxyl radical, and NO radicals in vitro. EC also showed a significant anti-lipid peroxidative effect in vivo. Histologic analysis revealed the regenerative impact of EC on the β-cells of diabetic rats. Conclusion : Findings revealed that EC possess antihyperglycemic and antioxidant effects.
背景与目的:白茅(Entandrophragma icum, EC)是一种广泛存在于西非各国的乔木。民间广泛使用它作为抗镰状病、抗疟疾、镇痛和抗炎药,传统上广泛用于治疗西非各地的糖尿病。本研究旨在探讨白茅叶甲醇提取物对大鼠的抗糖尿病作用。材料与方法:采用链脲佐菌素(STZ)腹腔注射诱导糖尿病。将动物分为五组(n=5),对比三种剂量(25 mg/kg, 50 mg/kg, 150 mg/kg p.o)的EC与标准药物(格列本脲)和对照组的活性。血糖水平高于250毫克/分升的大鼠被认为是糖尿病,并被用于研究。测定正常血糖、口服葡萄糖耐量试验(OGTT)、stz诱导糖尿病、EC提取物体外抗氧化性能及血清体内抗氧化性能。结果:植物化学鉴定出单宁、黄酮类、皂苷、生物碱、萜类、脱氧糖和蒽醌类化合物。研究中使用的三种剂量EC(150、50和25 mg/kg)可显著降低stz诱导的糖尿病大鼠模型的血糖水平。此外,与未治疗的糖尿病大鼠相比,EC(150、50和25 mg/kg)在第0天至第30天的体重分别显著(p< 0.001)增加。结果表明,EC可能是一种有效的自由基清除剂,可以清除2,2 -二苯基picrylhydrazyl (DPPH)自由基、羟基自由基和NO自由基。EC在体内也有明显的抗脂质过氧化作用。组织学分析显示了EC对糖尿病大鼠β-细胞的再生作用。结论:茯苓多糖具有抗高血糖和抗氧化作用。
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引用次数: 2
Analytical Formula for the total scatter factor of the Small Radiation Field Size 小辐射场尺寸总散射系数的解析公式
Pub Date : 2021-12-01 DOI: 10.52547/rabms.7.3.152
Saed J Al Atawneh
Background & Aims : We present an analytical formula (AF) to calculate the total scatter factor of the MLC-shaped small radiation beams. Materials & Methods : Pinpoint, Semiflex, and Farmer ion chambers were used for MLC/Jaw-shaped fields extending from (10x10 cm 2 ) down to (1x1 cm 2 ). The total scatters factor, beam profiles, and penumbra was investigated for MLC/Jaw-shaped beams. Results : We found that the total scatters factor and the penumbra was clearly higher for MLC-shaped beams due to the MLC leakage, which becomes more and more significant for the small fields. The Analytical Formula was introduced as a least-square fit equation and verified against to measure data. The maximum deviation at small field size (< 4 cm 2 ) was within 3.6% and 43.9% from both MLC and Jaw-shaped beams, respectively. Conclusion : Our analytical formula shows a very good agreement with measured data at a large field size (> 4 cm 2 ), and had small deviation with MLC-shaped small field size, emphasizing that our analytical formula is valid and reasonably good for the total scatters factor calculation of the MLC-shaped beams, especially the ultra-small field size.
背景与目的:提出了一种计算mlc型小辐射光束总散射系数的解析公式。材料与方法:用于从(10x10cm2)到(1x1cm2)的MLC/颚形区,使用Pinpoint, Semiflex和Farmer离子室。研究了MLC/颚形光束的总散射因子、光束轮廓和半影。结果:由于MLC泄漏,MLC形光束的总散射因子和半影明显更高,并且在小场中变得越来越明显。分析公式以最小二乘拟合方程的形式引入,并通过实测数据进行了验证。在小场尺寸(< 4 cm 2)下,MLC和颚形光束的最大偏差分别在3.6%和43.9%以内。结论:本文的分析公式与大视场尺寸(> 4 cm 2)下的实测数据吻合良好,与mlc形光束的小视场尺寸偏差较小,说明本文的分析公式对于mlc形光束的总散射因子计算是有效的,特别是对于超小视场尺寸的计算是合理的。
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引用次数: 1
The Role of Radioprotector Agents in the Protection of Normal tissue 放射防护剂在保护正常组织中的作用
Pub Date : 2021-12-01 DOI: 10.52547/rabms.7.3.161
Soraya Emamgholizadeh Minaei, F. Hoseini
The role of radioprotectors to reduce the cellular damage induced by ionizing radiation has been studied in human, animal and in vitro culture models. Radiation therapy cannot eradicate tumors successfully because of soft tissue damage. Proper use of radioprotective agents (before or shortly after radiation) can reduce normal tissue radiation toxicity and improve treatment output. There are three groups of radioprotectors: Synthetic protectors, antioxidant nutrients, and Immunomodulators. We discussed the radioprotective efficacy and its interaction against toxic agents. In addition, we discussed articles that have used radioprotective agents in the treatment of cancer with radiotherapy to protect normal tissue.
在人体、动物和体外培养模型中研究了辐射防护剂对减少电离辐射引起的细胞损伤的作用。由于软组织损伤,放射治疗不能成功根除肿瘤。正确使用辐射防护剂(在辐射前或辐射后不久)可以减少正常组织的辐射毒性,提高治疗效果。有三组放射性保护剂:合成保护剂、抗氧化营养剂和免疫调节剂。我们讨论了辐射防护效果及其对有毒物质的相互作用。此外,我们还讨论了在放疗治疗癌症中使用放射防护剂来保护正常组织的文章。
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引用次数: 0
Perception and Knowledge of Antibiotic Resistance: A Cross Sectional Study among Students in a Medical College, India 抗生素耐药性的认知和知识:印度一所医学院学生的横断面研究
Pub Date : 2021-12-01 DOI: 10.52547/rabms.7.3.147
Sudhir Rao, Vidusha Karavadi, S. Rajagopal
Background & Aims : The threat of antibiotic resistance is rapidly progressing and intensifying. It is an important global issue and health-care problem that needs urgent attention. This study will help provide a better understanding of what the students know and believe about the issue of antibiotic resistance . This study was designed to assess the knowledge, attitude and perception level among students concerning antibiotic resistance as well as their self-reported practices related to antibiotic usage. Materials and Methods : A cross sectional descriptive study was conducted among 230 study participants (Interns and post graduates).A semi structured questionnaire was administered to the participants. Results : All the participants are aware of antibiotic resistance.192 (83.4%) of the participants agreed that indiscriminate and injudicious use of antibiotics leads to ineffective treatment in future. The perception and attitude of the study participants showed that 144 (62.6%) of participants agreed that skipping one or two doses contributes to the development of antibiotic resistance. Majority of the study participants opined that they need more training in the antibiotic selection and on antibiotic resistance. Conclusion : The findings of the study concluded that there is a need for proper planning and devising an effective and tailored educational intervention, which can unlock the initial step to curb the alarming increase in resistance.
背景与目的:抗生素耐药性的威胁正在迅速发展和加剧。这是一个需要紧急关注的重要全球问题和保健问题。这项研究将有助于更好地了解学生对抗生素耐药性问题的了解和看法。本研究旨在评估学生对抗生素耐药性的知识、态度和感知水平,以及他们自我报告的与抗生素使用有关的行为。材料与方法:采用横断面描述性研究对230名研究参与者(实习生和研究生)进行研究。对参与者进行了半结构化问卷调查。结果:所有受试者均了解抗生素耐药情况(83.4%)的参与者认为不加区分和不明智地使用抗生素会导致未来治疗无效。研究参与者的看法和态度表明,144名(62.6%)参与者同意不服用一到两剂会导致抗生素耐药性的产生。大多数研究参与者认为他们需要在抗生素选择和抗生素耐药性方面进行更多的培训。结论:研究结果表明,有必要进行适当的规划和设计有效和量身定制的教育干预,这可以开启遏制耐药性惊人增长的第一步。
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引用次数: 0
Antimicrobial Activity of Carvacrol against Lactobacillus acidophilus and Lactobacillus casei, An In-Vitro Study 香芹酚对嗜酸乳杆菌和干酪乳杆菌抑菌活性的体外研究
Pub Date : 2021-12-01 DOI: 10.52547/rabms.7.4.172
Kiana Safa Larijani, Ali Akbar Moghhaddam Nia, Atefeh Bozorgi Makrani, Mohaddesseh AbouHosseini Tabari, E. Khodadadi
Background & Aims : Lactobacillus acidophilus (L. acidophilus) and Lactobacillus casei L. casei) are the primary bacterial pathogens involved in dental caries and periodontal diseases. In this study, we aimed to investigate the antimicrobial activity of Carvacrol in inhibiting the growth of these two microbial species in-vitro. Materials & Methods : In this study, we prepared standard colonies of L. acidophilus and L. casei , then evaluated disk diffusion and well diffusion tests on De Man-Rugose and Sharpe (MRS) agar plates to determine the antimicrobial activity of Carvacrol. We used 30 µg tetracycline disks as control. To evaluate the minimum inhibitory concentration (MIC), Carvacrol was used in the range of 20 to 0.039 µL in MRS broth medium containing bacteria. To determine the Minimum Bactericidal Concentration (MBC), the contents of tubes were subsequently cultured on MRS agar plates. Results : The MIC and MBC of Carvacrol against L. casei were 0.406 ± 0.143 and 0.813 ± 0.287 µg/mL, and against L. acidophilus were 0.254 ± 0.072 and 0.406 ± 0.143 µg/mL, respectively. In the disk diffusion test, carvacrol solution (2%) significantly induced inhibitory zones against L. casei and L. acidophilus . Although In the well diffusion test, 2% carvacrol solution generated inhibitory zones against L. casei . and against L. acidophilus with detectableinhibitory zones, but they werer not statistically significant.. We noted a significant difference only for the volume of 80 µL of solution (p = 0.03). Conclusion : The present study indicated that Carvacrol could be used as a natural alternative agent against L. acidophilus and L. casei generated dental caries.
背景与目的:嗜酸乳杆菌(Lactobacillus acidophilus)和干酪乳杆菌(Lactobacillus casei L. casei)是引起龋齿和牙周病的主要病原菌。在本研究中,我们旨在研究香芹酚在体外抑制这两种微生物生长的抑菌活性。材料与方法:制备了嗜酸乳杆菌和干酪乳杆菌的标准菌落,并在De Man-Rugose和Sharpe (MRS)琼脂平板上进行了圆盘扩散和孔扩散试验,以测定Carvacrol的抑菌活性。以30µg四环素片为对照。为了评估最小抑制浓度(MIC), Carvacrol在含有细菌的MRS肉汤培养基中使用20 ~ 0.039µL。为了确定最低杀菌浓度(MBC),试管内容物随后在MRS琼脂板上培养。结果:Carvacrol对干酪乳杆菌的MIC和MBC分别为0.406±0.143和0.813±0.287µg/mL,对嗜酸乳杆菌的MIC和MBC分别为0.254±0.072和0.406±0.143µg/mL。在圆盘扩散试验中,2%的香芹酚溶液对干酪乳杆菌和嗜酸乳杆菌有明显的抑制区。虽然在孔扩散试验中,2%的香芹酚溶液对干酪乳杆菌产生了抑制带。对嗜酸乳杆菌均可检测到抑菌带,但差异无统计学意义。我们注意到只有80µL溶液的体积有显著差异(p = 0.03)。结论:香芹酚可作为防治嗜酸乳杆菌和干酪乳杆菌所致龋病的天然替代剂。
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引用次数: 1
Low serum vitamin D levels in Iranians with immune thrombocytopenia: A single-center study 伊朗免疫性血小板减少症患者血清维生素D水平低:一项单中心研究
Pub Date : 2021-11-01 DOI: 10.52547/rabms.7.2.100
Mahsa Matinkia, Rahim Asghari, Hamdollah Sharifi
Background & Aims : Immune thrombocytopenia is a disorder characterized by decreased platelet production and degradation. The objectives of our study were to assess the relationship between 1,25(OH)2D3 levels and ITP based on sex, age, and duration of disease. Materials & Methods : The present study was retrospectively conducted by reviewing medical records of the ITP patients. Demographic data including age, sex, disease history and serum vitamin D levels were performed and collected in a pre-designed form. Data were reported as Mean ±SD and as frequency (percentage). Independent t-test or ANOVA tests were used to compare the mean serum levels of vitamin D in terms of sex, age or disease history. Results : A total of 140 subjects (71 females and 69 males) with mean age± SD of 39.90 ± 16.11 years enrolled in the study. The mean serum vitamin D level in patients was 18.85 ± 10.87. There was no significant relationship between sex and serum vitamin D level (P=0.943). Patients in the range of 30-40 years have the most frequency and the lowest level of vitamin D in serum (17.11± 9.68 ng/ml). There was no association between age and vitamin D based on Pearson’s test (p=0.181). Vitamin D level in acute ITP patients was lower than chronic ITP patients, but this difference was not meaningful (p=0.403). Conclusion : According to the findings of this study vitamin D can be administered as a new immunomodulatory therapy in patients with ITP.
背景与目的:免疫性血小板减少症是一种以血小板产生和降解减少为特征的疾病。本研究的目的是评估基于性别、年龄和疾病持续时间的1,25(OH)2D3水平与ITP之间的关系。材料与方法:本研究通过回顾ITP患者的医疗记录进行回顾性研究。人口统计数据包括年龄、性别、病史和血清维生素D水平,以预先设计的形式进行和收集。数据以Mean±SD和frequency(百分比)报告。使用独立t检验或方差分析检验来比较不同性别、年龄或疾病史的维生素D平均血清水平。结果:共纳入140例受试者,其中女性71例,男性69例,平均年龄±SD为39.90±16.11岁。患者血清维生素D水平平均值为18.85±10.87。性别与血清维生素D水平无显著相关(P=0.943)。30 ~ 40岁患者血清中维生素D含量最高,最低(17.11±9.68 ng/ml)。皮尔逊检验显示,年龄和维生素D之间没有关联(p=0.181)。急性ITP患者的维生素D水平低于慢性ITP患者,但差异无统计学意义(p=0.403)。结论:根据本研究结果,维生素D可作为一种新的免疫调节治疗ITP患者。
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引用次数: 0
Leaning in the publishing of articles in scientific journals during the COVID-19 pandemic 在2019冠状病毒病大流行期间,在科学期刊上发表文章
Pub Date : 2021-11-01 DOI: 10.52547/rabms.7.2.68
A. Golchin, Parviz Ranjbarvan, L. Roshangar
Scientific papers are valuable sources of information for scientific study. Apart from the main text, their content holds a notable amount of information. Recently, COVID-19 and related papers have attracted much attention between academic researchers, nonacademic people, and diverse social media. These papers can reveal different aspects of the COVID-19 pandemic. Publication criteria are changing rapidly for science-related coronavirus pandemic, as scientists worldwide conduct research at breakneck speeds to tackle this pandemic(1). During the last pandemic, we dived into the scientific literature to reflect on the COVID-19 pandemic. Researchers have created so much about COVID-19 related information that has been necessary for public health responses and the speedy development of therapeutic protocols and effective vaccines(2). To date, different therapeutic theories have been presented for treating and preventing COVID-19(3–6). However, the COVID-19 pandemic has severely discouraged people's lifestyle and economic situation. Therefore, many people, including lawmakers and directors from different agencies, have turned to the scientific society for answers regarding actions that need to be taken to control and treat the COVID-19(2). Nevertheless, many scientific studies published concerning the COVID-19; even those reported by prestigious journals fall short on experimental evidence to support their conclusions. Tremendous pressure existed to immediately know more about COVID-19 and how to stop this pandemic. Hence, the aforementioned situation created a unique atmosphere that led editors and reviewers to accept manuscripts that would have never been considered for publication under different conditions. During this pandemic, the piece of unreliable information was reported in journal papers. Some of these journals are prestigious with considerable scientific impact factors. However, publishing this erroneous information was a negative point for these journals and their authors. Still, this erroneous information compared to shared inaccurate information in different electronic media, primarily virtual media, was debatable and valuable. In virtual media, many fortune-tellers were reputed due to sharing different predictions of the future of this pandemic. Many virtual channels shared their false profitable information.
科学论文是科学研究的宝贵信息来源。除了正文,它们的内容还包含了大量的信息。最近,新冠肺炎及其相关论文在学术研究人员、非学术人士和各种社交媒体之间引起了广泛关注。这些论文可以揭示COVID-19大流行的不同方面。随着世界各地的科学家以极快的速度开展研究以应对这场大流行,与科学相关的冠状病毒大流行的出版标准正在迅速变化(1)。在上次大流行期间,我们深入研究了科学文献,对COVID-19大流行进行了反思。研究人员已经创造了大量与COVID-19相关的信息,这些信息对于公共卫生应对和快速开发治疗方案和有效疫苗是必要的(2)。迄今为止,已经提出了不同的治疗和预防COVID-19的治疗理论(3-6)。然而,新冠肺炎疫情严重影响了人们的生活方式和经济状况。因此,包括立法者和不同机构的负责人在内的许多人都转向科学界寻求控制和治疗COVID-19所需采取的行动的答案(2)。然而,许多发表的关于COVID-19的科学研究;即使是那些在著名期刊上发表的论文,也缺乏实验证据来支持他们的结论。人们面临着巨大的压力,需要立即更多地了解COVID-19以及如何阻止这场大流行。因此,上述情况创造了一种独特的氛围,使得编辑和审稿人接受了在其他条件下永远不会考虑发表的手稿。在这次大流行期间,这条不可靠的信息被报道在期刊论文中。其中一些期刊具有相当大的科学影响因子。然而,发表这些错误的信息对这些期刊及其作者来说是一个负面的点。然而,与在不同的电子媒体(主要是虚拟媒体)上共享的不准确信息相比,这种错误信息是有争议的,也是有价值的。在虚拟媒体上,许多算命先生因分享对这次大流行未来的不同预测而闻名。许多虚拟频道分享了虚假的盈利信息。
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引用次数: 0
Impact of Comorbidities on the Management Outcome of Acute Exacerbation of COPD 合并症对慢性阻塞性肺病急性加重治疗结果的影响
Pub Date : 2021-11-01 DOI: 10.52547/rabms.7.2.62
Ronak Jain, P. Akhani, Deepak Nagar, R. Agrawal
Background & Aims : Chronic obstructive pulmonary disease (COPD) is an important cause of mortality and morbidity globally. COPD, if associated with multiple comorbidities, has a greater impact on treatment outcome and hospital stay, hence effective control of COPD is crucial for enhancing quality of life. Our study assesses the effect of comorbidities on management outcomes in acute exacerbations of COPD patients. Materials & Methods : An analytical cross-sectional study was planned on 630 patients. Patients with acute exacerbations of COPD who were admitted to pulmonary ward and ICU were enrolled in the study. Data analysis was done using MS Excel and SPSS version 21.0. Unpaired students’t-test was used and p < 0.05 was taken to be statistically significant. Results: 61.9% of patients had at least one associated comorbidity e.g. CAD (37.2%), hypertension (28.2%), diabetes mellitus (24.3%), and CVD (10.3%). We found that acute exacerbation of COPD patients with comorbidities had prolonged hospital stay, greater ICU admissions, and need for invasive ventilation as compared to those without comorbidities. Presence of comorbidities with COPD was significantly associated with duration of hospital stay. Conclusion : Comorbidities associated with acute exacerbations of COPD increase the hospital stay, need for ICU admission and more invasive ventilation, and reduce the impact of treatments.
背景与目的:慢性阻塞性肺疾病(COPD)是全球死亡率和发病率的重要原因。慢性阻塞性肺病如果伴有多种合并症,对治疗结果和住院时间的影响更大,因此有效控制慢性阻塞性肺病对于提高生活质量至关重要。我们的研究评估了合并症对慢性阻塞性肺病急性加重患者治疗结果的影响。材料与方法:计划对630例患者进行分析性横断面研究。该研究纳入了入住肺病房和ICU的COPD急性加重患者。数据分析采用MS Excel和SPSS 21.0版本。采用Unpaired student’t检验,p < 0.05为差异有统计学意义。结果:61.9%的患者至少有一种相关合并症,如冠心病(37.2%)、高血压(28.2%)、糖尿病(24.3%)和心血管疾病(10.3%)。我们发现,与没有合并症的COPD患者相比,合并合并症的急性加重患者住院时间延长,ICU住院次数增加,需要有创通气。COPD合并症的存在与住院时间显著相关。结论:慢性阻塞性肺病急性加重期的合并症增加了住院时间、ICU住院需求和更有创通气需求,降低了治疗的影响。
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引用次数: 0
Bone Allografts: Products and Clinical Applications in Iran 同种异体骨移植:在伊朗的产品和临床应用
Pub Date : 2021-11-01 DOI: 10.52547/rabms.7.2.94
A. Golchin, Reza Samanipour, Parviz Ranjbarvan
Bone allografts have become an accepted technology to replace bone loss due to common diseases, such as tumor resection, trauma, and failed total joint arthroplasty. This study briefly reviews a branch of regenerative medicine related to bone allografts and its related aspects. As new allografts stimulate an immune rejection response, bone grafts are usually prepared by freezing or freeze-drying to decrease the immune system responses. The notable biological events of associations, such as hemorrhage and inflammation, osteogenesis, osteoinduction, osteoconduction, and impressive remodeling, result in a load-bearing structure. Generally, cancellous allografts are effectively incorporated, while cortical grafts remain an admixture of viable regenerated bone and old necrotic bone for a prolonged duration. Massive bone allografts used in reconstructing tumor resection have a long-term successful outcome in about 80 percent of the procedures. Similar success has been reported for its use in total joint revision surgery and other clinical applications. The significant complications reported for grafting procedures are infection, bone graft fracture, nonunion at the graft-host juncture, and rare massive allograft resorption. Although bone allografting is a successful therapeutic approach, emerging technologies will introduce more efficient bones by mobilizing the adjunctive growth factors, cell and gene-based therapies, and tissue engineering techniques. The primary and applicable knowledge of bone allografts is essential; however, continual investigations are necessary.
同种异体骨移植已成为一种公认的技术,以取代常见疾病,如肿瘤切除,创伤,失败的全关节置换术导致的骨质流失。本文简要综述了再生医学中与同种异体骨移植相关的一个分支及其相关方面。由于新的同种异体移植物刺激免疫排斥反应,骨移植物通常通过冷冻或冷冻干燥来减少免疫系统反应。显著的相关生物学事件,如出血和炎症、成骨、骨诱导、骨传导和令人印象深刻的重塑,导致了承重结构。一般来说,同种异体松质骨移植是有效的,而皮质骨移植仍然是长时间存活的再生骨和老坏死骨的混合物。大量同种异体骨移植用于重建肿瘤切除,在大约80%的手术中有长期成功的结果。在全关节翻修手术和其他临床应用中也有类似的成功报道。移植手术的主要并发症有感染、骨移植骨折、移植物-宿主接合处不愈合和罕见的大量同种异体移植物吸收。尽管同种异体骨移植是一种成功的治疗方法,但新兴技术将通过动员辅助生长因子、细胞和基因治疗以及组织工程技术,引入更有效的骨骼。具有同种异体骨移植的基本和适用知识是必不可少的;然而,持续的调查是必要的。
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引用次数: 0
Evaluation of the effects of cisplatin and the cisplatin-alum mixture as adjuvants for increasing the efficacy of vaccination against Salmonella typhimurium in Balb/c mice 评价顺铂和顺铂-明矾混合物作为佐剂提高Balb/c小鼠鼠伤寒沙门菌疫苗接种效力的效果
Pub Date : 2021-11-01 DOI: 10.52547/rabms.7.2.76
Ebrahim Mazloomi, N. Hosseini Jazani, Vahid Abbasian, S. Shahabi
Background & Aims : Salmonella typhimurium ( S. typhimurium ) is one of the causative agents of intestinal and extraintestinal infections in humans. Symptoms of the mouse infection by this bacterium mimic typhoid fever in humans. Adjuvants are compounds that enhance the effectiveness of vaccines in combination with them. Alum as an adjuvant causes a shift towards Th2 immune and strengthens the humoral immunity responses. Cisplatin is a highly effective anti-tumor drug that stimulates immune responses by activating macrophages and other immune cells and is used in tumor immunotherapy. This study aimed to investigate the role of cisplatin and the cisplatin-alum mixture as adjuvants to increase the efficacy of vaccination against S. typhimurium in Balb/c mice. Materials & Methods: Male BALB/c mice were divided into five groups. Mice in the experimental groups received either the HKST vaccine alone or in combination with the adjuvants alum, cisplatin, or the cisplatin-alum. Mice in the negative control group received phosphate-buffered saline. All mice were immunized two times on days 0 and 14. Two weeks after the last immunization, immune responses to S. typhimurium were assessed by measuring the survival rate after challenge with a lethal dose of bacterium, bacterial load in the liver, interferon-gamma, and S. typhimurium- specific IgG1 and IgG2a production. Results : The number of colonies in the spleen and liver cultures in all dilutions was significantly lower in cisplatin-vaccine, and cisplatin-alum vaccine immunized mice. The average rate of specific IgG2a was higher in the same groups compared to other groups. The survival rate in alum-vaccine, cisplatin-vaccine, and cisplatin-alum-vaccine groups was significantly higher than in the control group. The average rate of Interferon-gamma in cisplatin-vaccine and cisplatin- alum vaccine groups was significantly higher than other groups. Conclusion : This study is the first to determine the role of administrating cisplatin and alum-cisplatin mixture on increasing the efficiency of the HKST vaccine in a mouse model. This study confirmed the role of cisplatin and cisplatin-alum mixture in increasing the efficiency of the HKST vaccine by using different experiments.
背景与目的:鼠伤寒沙门菌(S. typhimurium)是人类肠道和肠外感染的病原体之一。小鼠感染这种细菌的症状类似于人类的伤寒。佐剂是一种化合物,可与疫苗结合使用,增强疫苗的效力。明矾作为佐剂引起Th2免疫的转变,增强体液免疫反应。顺铂是一种高效的抗肿瘤药物,通过激活巨噬细胞和其他免疫细胞来刺激免疫反应,用于肿瘤免疫治疗。本研究旨在探讨顺铂和顺铂-明矾混合物作为佐剂在提高Balb/c小鼠鼠伤寒沙门氏菌疫苗接种效果中的作用。材料与方法:雄性BALB/c小鼠分为5组。实验组小鼠单独接种HKST疫苗或与佐剂明矾、顺铂或顺铂-明矾联合接种。阴性对照组小鼠给予磷酸盐缓冲生理盐水。所有小鼠分别于第0天和第14天免疫2次。在最后一次免疫后两周,通过测量致命剂量细菌攻击后的存活率、肝脏细菌负荷、干扰素γ和鼠伤寒沙门氏菌特异性IgG1和IgG2a的产生来评估对鼠伤寒沙门氏菌的免疫应答。结果:顺铂疫苗和顺铂明矾疫苗免疫小鼠的脾脏和肝脏培养物中菌落数量均显著降低。与其他组相比,同一组中特异性IgG2a的平均率更高。铝疫苗组、顺铂疫苗组、顺铂铝疫苗组的生存率均显著高于对照组。顺铂疫苗组和顺铂明矾疫苗组干扰素γ平均率显著高于其他各组。结论:本研究首次在小鼠模型中确定顺铂和铝-顺铂混合物对提高HKST疫苗效率的作用。本研究通过不同的实验,证实了顺铂和顺铂明矾混合物在提高HKST疫苗效率方面的作用。
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Journal of Research in Applied and Basic Medical Sciences
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