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A sample copy of the textbook Principles of Cell and Tissue Biology 教科书《细胞与组织生物学原理》的样本
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7716
G. Chaldakov
The textbook has grown from many years of reading and discussions. Among the numerous colleagues with whom I have exchanged views during the past 59 years, my scientific father Zhelyazkov, and my colleague-brain-and-heart friends (BHF) (listed chronologically) Abstract The abstract (typically about, although not strictly restricted to, 250 words) should provide a concise summary of the data to be reviewed and major conclusions of the study. It should be written in complete sentences, without explicit subheadings. Citing references should be avoided.
这本教科书是在多年的阅读和讨论中形成的。在过去的59年里,我与许多同事交换了意见,其中包括我的科学父亲Zhelyazkov和我的同事-大脑和心脏的朋友(BHF)(按时间顺序列出)摘要摘要(通常约250字,但不严格限于250字)应该提供要审查的数据和研究的主要结论的简明总结。它应该写成完整的句子,没有明确的副标题。应该避免引用参考文献。
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引用次数: 1
Natural killer cells and immunotherapy based on monoclonal antibodies 自然杀伤细胞和基于单克隆抗体的免疫治疗
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7705
Magdalena Pencheva-Demireva, K. Kavaldzhieva, Nikola J. Mladenov, T. Markova, D. Dimitrova-Dikanarova
Natural killer (NK) cells are effector lymphocytes of innate immunity needed to protect against stressed cells and to destroy tumor cells and virus-infected cells. These cells play an important role in the immune surveillance of malignant cells, preventing their uncontrolled growth. Natural killer cells recognize target cells directly through their receptors, which bind to various determinants on the surface of the target cell. The receptor-ligand (secretory or membrane-bound) interaction between the NK cells and the target cells determines NK’s cell activity. The use of monoclonal antibodies in tumor therapy has increased significantly in the recent years. These antibodies are intended to block inhibitory receptors (immune checkpoint inhibitors) expressed by immune cells or to block their ligands expressed by tumor cells. Examples of such immune checkpoint molecules are the following receptors: cytotoxic T lymphocyte-associated protein 4 (CTLA-4), programmed cell death protein 1 (PD-1) and others. This blocking inhibits tumor growth by enabling immune system reactivation. The advances in cellular immunobiology that have provided the establishment of blocking monoclonal antibodies (ipilimumab, nivolumab, etc.) and increased NK cell proliferative activity are promising therapies for neoplasms. Biomed Rev 2020; 31: 61-65
自然杀伤细胞(NK细胞)是先天免疫的效应淋巴细胞,需要保护免受应激细胞和破坏肿瘤细胞和病毒感染的细胞。这些细胞在恶性细胞的免疫监视中发挥重要作用,防止其不受控制的生长。自然杀伤细胞通过与靶细胞表面的各种决定因子结合的受体直接识别靶细胞。NK细胞与靶细胞之间的受体-配体(分泌性或膜结合性)相互作用决定了NK细胞的活性。近年来,单克隆抗体在肿瘤治疗中的应用显著增加。这些抗体旨在阻断免疫细胞表达的抑制性受体(免疫检查点抑制剂)或阻断肿瘤细胞表达的其配体。这种免疫检查点分子的例子有以下受体:细胞毒性T淋巴细胞相关蛋白4 (CTLA-4)、程序性细胞死亡蛋白1 (PD-1)等。这种阻断通过使免疫系统重新激活来抑制肿瘤生长。细胞免疫生物学的进步提供了阻断单克隆抗体(ipilimumab, nivolumab等)的建立和NK细胞增殖活性的增加,是治疗肿瘤的有希望的治疗方法。Biomed Rev 2020;31日:61 - 65
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引用次数: 0
The murburn precepts for photoreception 默伯恩的感光戒律
Pub Date : 2020-05-07 DOI: 10.31219/osf.io/gmd5t
K. Manoj, Vivian David Jacob
Murburn concept is a redox mechanistic scheme involving interactive equilibriums of discretized or organized proteins/substrates molecules, unbound ions and radicals (or reactive species); which may afford selective/specific electron transfers, particularly at phospholipid interfaces. Earlier, we have applied murburn concept to provide parsimonious explanations (grounded in thermodynamics and kinetics) for various physiological/bioenergetic routines like xenobiotic metabolism, unusual dose responses, aerobic respiration, thermogenesis, homeostasis, trans-membrane potential, oxygenic photosynthesis, etc. While proposing the murburn model for photophosphorylation, we had projected that the murburn mechanism could also be relevant for photoreception physiology. Herein, we expand on this aspect and present the basic scheme and evidence in support for the murburn model of photoreception, with retinal/opsin as the salient photon-impingement response-transducing element. In alignment with our earlier murburn schemes, we propose that diffusible reactive oxygen species (DROS, as exemplified by superoxide, which is currently deemed a toxic product of all-trans retinal and NADPH oxidase interactions) is produced in rod/cone cells upon photoactivation and it plays a crucial role in the visual cycle. This is supported by the fact that layers of photoreceptive neural cells precede the rod/cone cells (with respect to the presentation to oncoming light ray/photon), there exists high oxygen demand in retina, copious ROS are detected in functional retina, NAD(P)H/reductase is involved in the cycle, events occur at sub-micrometer dimensioned phospholipid disks stacked to stabilize DROS and minimize free protons (quite like the thylakoids that harbor carotenoids in chloroplasts and cyanobacteria), etc. In the new scheme, photo-electric activation leads to charge separation and hyperpolarization. This electro-chemical signaling serves is the front-runner to a trigger for action potential relay along a neuron and the superoxide mediated phosphorylation of GDP bound to transducin serves as the initiator of signal transduction cascade. The newly proposed scheme allows a facile electrical connectivity of the retina-photoreceptors with the brain via the optic nerve, and is anatomically correlated with the structure and resolution or retina, and is kinetically viable.
Murburn概念是一种氧化还原机制方案,涉及离散或有组织的蛋白质/底物分子、未结合的离子和自由基(或活性物质)的相互作用平衡;它可以提供选择性/特异性电子转移,特别是在磷脂界面上。在此之前,我们已经应用murburn概念(基于热力学和动力学)为各种生理/生物能量过程(如异种代谢、异常剂量反应、有氧呼吸、产热、体内平衡、跨膜电位、含氧光合作用等)提供了简明的解释。在提出光磷酸化的murburn模型时,我们预测murburn机制也可能与光接受生理学有关。在此,我们对这方面进行了扩展,并提出了支持murburn光接受模型的基本方案和证据,其中视网膜/视蛋白是显著的光子撞击反应传导元件。与我们早期的murburn方案一致,我们提出,在光激活后,视杆/视锥细胞会产生扩散活性氧(DROS,如超氧化物,目前被认为是全反式视网膜和NADPH氧化酶相互作用的有毒产物),它在视觉循环中起着至关重要的作用。这是由以下事实支持的:感光神经细胞层在杆状/锥状细胞之前(关于对入射光线/光子的呈现),视网膜中存在高氧需求,在功能视网膜中检测到丰富的活性氧,NAD(P)H/还原酶参与循环,事件发生在亚微米尺寸的磷脂盘堆积以稳定活性氧并减少自由质子(很像叶绿体和蓝藻中含有类胡萝卜素的类囊体)。等。在新方案中,光电活化导致电荷分离和超极化。这种电化学信号是沿神经元的动作电位接力的触发者,而与转导蛋白结合的超氧化物介导的GDP磷酸化是信号转导级联的启动者。新提出的方案允许视网膜光感受器通过视神经与大脑进行简单的电连接,并且在解剖学上与视网膜的结构和分辨率相关,并且在动力学上可行。
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引用次数: 16
The great Geoffrey Burnstock: A passion for discovery and empathy 伟大的杰弗里·伯恩斯托克:对发现和同情的热情
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7699
G. Chaldakov
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引用次数: 0
Ongoing COVID-19 syndrome and post-COVID-19 syndrome: Long-term symptoms and residual changes after SARS-CoV-2 infection 持续的COVID-19综合征和后COVID-19综合征:SARS-CoV-2感染后的长期症状和残留变化
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7711
K. Kostov
Recently, in the time SARS-CoV-2 pandemic, there is increasing interest among the medical community in post-COVID-19 residual symptoms including structural and functional changes in different organs and systems The symptom characteristic and parameters of these changes in the period after illness are in the process of registration and complete clarification, and the first results were published It becomes clear that symptoms of COVID-19 (over 30 in number) even among those with a “mild form” of the disease remain for a long time after the acute phase in a large number of patients More data are needed on the somatic, mental and emotional characteristics of patients who have undergone COVID-19, the so-called „prolonged COVID-19 syndrome“, despite the lack of a generally accepted definition Knowledge of its clinical characteristic will help physicians to recognize its manifestations, and the healthcare system to prepare for its prevention and treatment Biomed Rev 2020;31: 117-123
最近,在SARS-CoV-2大流行期间,医学界对不同器官和系统的结构和功能变化等covid -19后残留症状的兴趣越来越大,这些变化在病后一段时间内的症状特征和参数正在登记和完全澄清过程中。很明显,在大量患者中,即使是“轻度形式”的COVID-19症状(超过30例)在急性期后仍存在很长时间,需要更多关于感染COVID-19的患者的身体、精神和情绪特征的数据,即所谓的“延长型COVID-19综合征”。尽管缺乏普遍接受的定义,但了解其临床特征将有助于医生认识其表现,并帮助医疗保健系统为其预防和治疗做好准备。生物医学杂志2020;31:117-123
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引用次数: 0
Phenotypic modulation of smooth muscle cells and matrix metalloproteinases as targets for atherosclerotic plaque stabilization 平滑肌细胞和基质金属蛋白酶作为动脉粥样硬化斑块稳定靶点的表型调节
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7704
G. Chaldakov, M. Zhelyazkova-Savova, Daniela Panayotova, M. Fiore, S. Yanev
Atherosclerosis and its complications, erosion and rupture of the plaque fibrous cap, lead to myocardial infarction and stroke, the main causes of mortality worldwide. In this setting, arterial smooth muscle cells (SMC) of the innermost media undergo phenotypic changes, a switch towards a secretory phenotype engaged in matrix proteins production. In its nature, this is a protective action that forms of a new arterial layer, the fibrous cap covering the plaque thrombogenic lipid core. The risk of plaque rupture is inversely correlated with the presence of secretory state SMC and collagen fibrils within the fibrous cap. Thus, fibrous cap remodeling appears to be the main determinant of plaque vulnerability. Herein, we focus on the potential role of (i) the transcription factors TCF21 and KLF-4 in SMC phenotypic modulation, (ii) the matrix protein secretion of SMC, and (iii) the activity of proteinases (MMP, ADAM, ADAMTS, furin, and the MMP inducer CD147) in this critical process. We argue that focusing on these basic pathways could contribute to the knowledge of fibrous cap stability that might be translated into clinical medicine.
动脉粥样硬化及其并发症,斑块纤维帽的侵蚀和破裂,可导致心肌梗死和中风,这是全世界死亡的主要原因。在这种情况下,最内层介质的动脉平滑肌细胞(SMC)发生表型改变,转向分泌型表型,参与基质蛋白的产生。从本质上讲,这是一种保护作用,形成新的动脉层,即覆盖斑块血栓形成的脂质核心的纤维帽。斑块破裂的风险与纤维帽内分泌状态SMC和胶原原纤维的存在呈负相关。因此,纤维帽重塑似乎是斑块易感性的主要决定因素。在此,我们重点研究了(i)转录因子TCF21和KLF-4在SMC表型调节中的潜在作用,(ii) SMC基质蛋白分泌,以及(iii)蛋白酶(MMP, ADAM, ADAMTS, furin和MMP诱导剂CD147)在这一关键过程中的活性。我们认为,关注这些基本途径可能有助于了解纤维帽稳定性,这可能会转化为临床医学。
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引用次数: 0
Platelet-rich fibrin treatment of medication-related osteonecrosis of the jaw followed up for two years 富血小板纤维蛋白治疗药物相关性颌骨骨坏死随访2年
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7715
M. Hristamyan, V. Hristamyan
The use of platelet-rich fibrin (PRF) in surgery represents a new alternative method of treatment of Medication-related osteonecrosis of the jaws. This report presents a case of a patient undergoing PRF treatment. The patient is a 76-year-old male who was admitted for treatment in 2018 at the Clinic for Maxillofacial Surgery with osteonecrosis of the lower jaw on the right side. In 2012, he was diagnosed with prostate cancer and underwent bilateral orchiectomy followed by a therapy with Denosumab (trade names Prolia and Xgeva), a monoclonal antibody that works as receptor activator of nuclear factor kappa-Β ligand (RANKL) inhibitor. The patient was diagnosed with medication-related osteonecrosis of the mandible jaw in 2017 after tooth extraction. The treatment was performed at the Clinic of Maxillofacial Surgery of St. George University Hospital, Plovdiv, Bulgaria. When initial antibiotic therapy failed, surgical therapy was undertaken using PRF. The patient was followed-up for two years and no osteonecrotic lesion was detected recurring in the intervention area. Biomed Rev 2020; 31: 161-163
富血小板纤维蛋白(PRF)在外科手术中的应用代表了治疗颌骨药物相关性骨坏死的一种新的替代方法。本报告报告了一例接受PRF治疗的患者。患者是一名76岁的男性,2018年因右侧下颚骨坏死在颌面外科诊所接受治疗。2012年,他被诊断患有前列腺癌,接受了双侧睾丸切除术,随后接受了Denosumab(商品名Prolia和Xgeva)治疗,这是一种单克隆抗体,可作为核因子kappa-Β配体(RANKL)抑制剂的受体激活剂。患者于2017年拔牙后被诊断为下颌骨药物相关性骨坏死。治疗是在保加利亚普罗夫迪夫圣乔治大学医院颌面外科诊所进行的。当最初的抗生素治疗失败时,使用PRF进行手术治疗。随访2年,干预区未发现复发性坏死灶。Biomed Rev 2020;31日:161 - 163
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引用次数: 0
Biomarkers of acute kidney injury and their role in clinical patient management 急性肾损伤的生物标志物及其在临床患者管理中的作用
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7701
Ecem Busra Deger, Enver Arslan, M. Değer, Oktay Kaya
Acute kidney injury (AKI) is a common public health problem and has a significant impact on cardiovascular disease, mortality and increased hospital costs. Also, AKI can progress to chronic kidney disease (CKD). Therefore, early diagnosis is very important for AKI. Serum creatinine (SCr) is a well-known biomarker in the diagnosis of AKI. However, changes in SCr levels are insufficient in early diagnosis so, new biomarkers are needed. Because of that, the search for biomarkers for the early detection of AKI is an ongoing process. In recent years, early diagnosis, prognostic and predictive biomarkers have been discovered to replace or support SCr in the diagnosis of AKI. New biomarkers can help early diagnosis and effective management of AKI. Since there are many biomarkers, when and under which condition these biomarkers should be used cause confusion. In this review, we aimed to construct and ease to use classification of these AKI biomarkers and summarize the current literature. We have divided the biomarkers into two main categories: renal and non-renal origin. Then, we have classified the biomarkers of renal origin as glomerular, tubular and unknown renal site. We have also described the clinical use of these biomarkers for diagnosis and prognosis. Biomed Rev 2020; 31:
急性肾损伤(AKI)是一个常见的公共卫生问题,对心血管疾病、死亡率和医院费用增加有重大影响。此外,AKI可以发展为慢性肾脏疾病(CKD)。因此,AKI的早期诊断非常重要。血清肌酐(SCr)是诊断AKI的一个众所周知的生物标志物。然而,SCr水平的变化不足以用于早期诊断,因此需要新的生物标志物。正因为如此,寻找早期发现AKI的生物标志物是一个持续的过程。近年来,早期诊断、预后和预测性生物标志物已被发现在AKI诊断中取代或支持SCr。新的生物标志物有助于AKI的早期诊断和有效管理。由于有许多生物标记物,在什么时候以及在什么条件下使用这些生物标记物会引起混淆。在这篇综述中,我们旨在构建和简化这些AKI生物标志物的分类,并总结目前的文献。我们将生物标志物分为两大类:肾源性和非肾源性。然后,我们将肾脏起源的生物标志物分为肾小球、肾小管和未知肾部位。我们还描述了这些生物标志物在诊断和预后方面的临床应用。Biomed Rev 2020;31日:
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引用次数: 0
New challenges to renin-angiotensin-system in COVID-19 pandemic COVID-19大流行对肾素-血管紧张素系统的新挑战
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7709
S. Yanev, T. Stoyanova
In the fight against the global epidemic from the new corona virus (SARS-CoV-2), awareness on the site of the primary viral attack, the so-called „entry port“ enables an implies efficient prophylactic/therapeutic approach The attack is aimed at the important balancing unit of the renin-angiotensin system (RAS), angiotensin-converting enzyme 2 (ACE2), which regulates the level of angiotensin II (Ang II) While Ang II has vasoconstrictor and inflammatory functions, the ACE2 converted product of Ang-(1-7) possesses vasodilating and anti-inflammatory functions In patients with pathological cardiovascular symptoms and increased blood pressure, maintenance of optimal Ang II is achieved by inhibiting the synthesizing enzyme ACE1 or blocking the angiotensin receptor response (ATR) In this Dance Round, an attempt is made to address the question: In the unbalanced functions of RAS (manifesting as an outcome of SARS-CoV-2 epidemic), will the therapeutic effect of ACE1 inhibitors change and in what direction?
在抗击新型冠状病毒(SARS-CoV-2)全球流行的斗争中,对主要病毒攻击部位的认识,即所谓的“入口”,可以提供一种潜在的有效预防/治疗方法。攻击的目标是肾素-血管紧张素系统(RAS)的重要平衡单元,血管紧张素转换酶2 (ACE2),它调节血管紧张素II (Ang II)的水平,而Ang II具有血管收缩和炎症功能。在具有病理性心血管症状和血压升高的患者中,通过抑制ACE1合成酶或阻断血管紧张素受体反应(ATR)来维持最佳的Ang II。本文试图解决以下问题:在RAS功能失衡(表现为SARS-CoV-2流行的结果)中,ACE1抑制剂的治疗效果会发生变化吗?方向是什么?
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引用次数: 0
COVID-19 as an oxygen-deprivation disease COVID-19是一种缺氧疾病
Pub Date : 2020-05-07 DOI: 10.14748/BMR.V31.7710
S. Yanev
Since the last year, the epidemic with the new coronavirus SARS-CoV-2 has accumulated a wealth of data The genetic structure of the virus, the epidemiological characteristics of the spread, the main clinical manifestations, the risks of the healing process, and the approaches for therapeutic intervention, etc are the main areas into which the information can be parsed The experimental and clinical data confirm the view that the new coronavirus causes pathogenic changes, which can be summarized as hypoxic syndrome In this Dance Round, I shall succinctly justify this claim
去年以来,新型冠状病毒SARS-CoV-2疫情积累了丰富的数据,病毒的遗传结构、传播的流行病学特征、主要临床表现、愈合过程的风险、治疗干预的途径等是信息可解析的主要领域,实验和临床数据证实了新型冠状病毒引起致病性变化的观点。它可以被概括为缺氧综合症在这一轮舞蹈中,我将简洁地证明这一说法
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引用次数: 0
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