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La importancia de evaluar el daño al DNA 评估 DNA 损伤的重要性
Pub Date : 2024-01-10 DOI: 10.22201/fm.24484865e.2024.67.1.02
Marcela Rojas Lemus, Nelly López Valdez, Adriana González Villalva, Patricia Bizarro Nevares, María Eugenia Cervantes Valencia, Brenda Casarrubias Tabarez, T. Fortoul
It is estimated that the human body is made of trillions of cells, which suffer hundreds of thousands of DNA lesions every day. Although DNA is not the only biomolecule that suffers damage, its importance lies in the fact that it is the only biomolecule that cannot be replaced by the cell, so when it suffers damage, the cell must repair it, tolerate or, in a extreme case, activate pathways that will lead to death, since the objective is to maintain cell integrity and the homeostasis of the organism.There are thousands of agents that can damage DNA, some are produced by the cell and are called 'endogenous, while others are external agents and are known as 'exogenous. The cell cannot avoid the damage caused by endogenous agents, since they are products of its metabolic activity, for example, so when they occur, cellular mechanisms are immediately activated to mitigate them. The same happens with the damage caused by exogenous agents, since the cell will do everything possible to diminish the adverse effects they can cause. The problem becomes apparent when the cell is unable to repair the damage or poorly repairs it, or repairs so much that the mechanisms are overwhelmed, when the damage remains in the DNA and a state of chromosomal instability is generated that can lead the cell to dysfunction and malignization. This state of chromosomal instability can be reflected in increased DNA breaks or micronuclei in exposed cells, which can be quantified by special methods such as the 'Comet Assay' and the 'Micronucleus Assay'. Since identifying DNA damage is a way of evaluating the toxic potential of the agents to which populations are exposed, it allows us to know their mechanisms of action and helps to understand the factors that influence the detriment in population's health. Key words: DNA damage; genotoxic evaluation; repair; Comet Assay; micronuclei.
据估计,人体由数万亿个细胞组成,这些细胞每天都会遭受数十万次 DNA 损伤。虽然 DNA 不是唯一会受到损伤的生物大分子,但它的重要性在于它是唯一不能被细胞替代的生物大分子,因此当它受到损伤时,细胞必须修复它、容忍它,或者在极端情况下激活导致死亡的途径,因为目的是保持细胞的完整性和机体的平衡。细胞无法避免内源性物质造成的损伤,因为它们是细胞新陈代谢活动的产物。外源物质造成的损害也是如此,因为细胞会尽一切可能减少它们可能造成的不利影响。当细胞无法修复损伤,或修复效果不佳,或修复量过大以至于修复机制不堪重负时,问题就显现出来了,这时损伤会残留在 DNA 中,并产生染色体不稳定状态,从而导致细胞功能紊乱和恶变。这种染色体不稳定状态可反映为暴露细胞中 DNA 断裂或微核的增加,可通过 "彗星试验 "和 "微核试验 "等特殊方法进行量化。由于确定 DNA 损伤是评估人口所接触的制剂的毒性潜力的一种方法,因此它使我们能够了解这些制剂的作用机制,并有助于了解影响人口健康的有害因素。关键词DNA 损伤;基因毒性评估;修复;彗星试验;微核。
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引用次数: 0
Las tijeras de… ¿Dios? 上帝的剪刀?
Pub Date : 2024-01-10 DOI: 10.22201/fm.24484865e.2024.67.1.01
Teresa I. Fortoul van der Goes
even before the discovery of the existence of genes, science fiction writers werealready curious about the ability to modify the genetic code of living beings and its ethicalimplications. Dragon Island already raised the ethical dilemma posed by geneticmodification today known as genetic engineering. The continuous interest in expandingknowledge about the human genome and the different genes encoded has drivenprogress in DNA sequencing and from research, interests have been directed towards agreater understanding of the function of genes and progress in the most precise geneticediting possible.
甚至在发现基因的存在之前,科幻小说家们就已经对修改生物遗传密码的能力及其伦理影响充满了好奇。龙岛》已经提出了今天被称为基因工程的基因改造所带来的伦理困境。人们对扩大人类基因组和不同基因编码知识的持续兴趣,推动了 DNA 测序的进展,并从研究中获得了对基因功能更深入的了解,以及在尽可能精确的基因编辑方面取得的进展。
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引用次数: 0
Haga su diagnóstico 进行诊断
Pub Date : 2024-01-10 DOI: 10.22201/fm.24484865e.2024.67.1.07
Alejandra Valdés Gómez, Abel Manuel Lanzarín Minero, J. Ramírez-Arias
On this occasion we invite you to do the present exercise on the case of a 40 years old male patient, who has developed a progressive volume increase of the right testicle for the last 6 months, even did not report pain, but feeling of heaviness in the last week is present, ligth sign negative.
在此,我们邀请您就一位 40 岁男性患者的病例进行本次练习,该患者在过去 6 个月中右侧睾丸体积逐渐增大,甚至没有报告疼痛,但在最近一周出现了沉重感,韧带征阴性。
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引用次数: 0
Las obras inacabadas de Rodin 罗丹的未完成作品
Pub Date : 2024-01-10 DOI: 10.22201/fm.24484865e.2024.67.1.08
T. Fortoul
Surprisingly, Rodin never studied at the School of Fine Arts and trained mainly self-taught. This surely contributed to the development of a vision outside the canons of the Academy that changed reality to present it as pleasant, although false, far from reality. With his works he directed attention towards what was true, although imperfect, and in this he highlighted the beauty
令人惊讶的是,罗丹从未在美术学院学习过,主要靠自学成才。这无疑有助于他在学院派的规范之外发展自己的视野,改变现实,使其呈现出令人愉悦的一面,尽管是虚假的,与现实相去甚远。他的作品将人们的注意力引向了真实的事物,尽管这些事物并不完美。
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引用次数: 0
Craniectomía descompresiva en infarto de arteria cerebral media bilateral asociado aCOVID-19. Reporte de caso 与COVID-19相关的双侧大脑中动脉梗塞的减压开颅手术。病例报告
Pub Date : 2024-01-10 DOI: 10.22201/fm.24484865e.2024.67.1.06
Marco Antonio Flores-Maya, José Roberto Vázquez-Nieves, Octavio Jesús Arroyo-Zavala, Jenner Laredo-Gómez
The new severe acute respiratory syndrome due to coronavirus type 2 (SARS-CoV-2), which causes COVID-19 disease, was detected for the first time in December 2019. Where it has been seen that there is a prothrombotic state with involvement of the Central Nervous, with involvement of large vessels such as the middle cerebral artery, is due to mechanisms induced by the infection itself, hypercoagulable state and endothelial damage. Neurological manifestations in COVID-19 are found in 36% of patients. Case description: This is a 36-year-old male patient with fever, cough and general malaise. A COVID test was performed, which came out positive. His condition was getting worse adding photophobia, right hemiparesis and deviation of the corner of the mouth to the left, which is why he went to the doctor, arriving 8 hours after the onset of the clinical picture, where a simple skull tomography was performed, showing extensive infarction of the left middle cerebral artery with malignant cerebral edema. He was transferred to emergency surgical management where a left decompressive craniectomy was performed. After this, mechanical respiratory assistance with intubation and anti-cerebral edema measures were maintained, achieving ventilatory progression; however, a tracheostomy and gastrostomy were performed due to poor predictors of extubation. He was kept under post-surgical observation, leaving him with 3/5 right hemiparesis, without any other deficit, therefore, he was discharged home. Discussion: The case presented was managed with decompressive craniectomy, resulting in an improvement in survival, as reported in the literature where it is recommended that such management should be performed early. Conclusions: This report reveals that patients with COVID-19 present in young men in the fourth and fifth decade of life, without comorbidities, that recieved early treatment with decompressive hemicraniectomy, improved their life prognosis, consistent with the cases presented in the literature. Keywords: COVID-19; brain infarction; decompressive craniectomy; hypercoagulability.
2019年12月首次发现了新型冠状病毒2型(SARS-CoV-2)导致的严重急性呼吸系统综合征(COVID-19病)。其中已经出现了血栓前状态,累及中枢神经,累及大脑中动脉等大血管,是由于感染本身、高凝状态和内皮损伤等机制诱发的。36% 的患者在 COVID-19 中出现神经系统表现。病例描述这是一名 36 岁的男性患者,伴有发烧、咳嗽和全身不适。进行了 COVID 检测,结果呈阳性。他的病情越来越严重,并伴有畏光、右侧偏瘫和嘴角向左偏斜等症状,这就是为什么他在出现临床症状 8 小时后才去看医生,医生为他做了简单的头颅断层扫描,结果显示左侧大脑中动脉广泛梗死,并伴有恶性脑水肿。他被转入急诊外科治疗,在那里进行了左侧减压开颅手术。在此之后,插管机械辅助呼吸和抗脑水肿措施得以维持,实现了通气进展;然而,由于拔管预测不佳,进行了气管造口术和胃造口术。手术后对他进行了观察,发现他右侧偏瘫 3/5,没有任何其他缺陷,因此,他出院回家了。讨论该病例采用了减压颅骨切除术,改善了患者的生存状况。结论:本报告显示,COVID-19 患者多为四五十岁的年轻男性,无合并症,早期接受减压性半颅骨切除术可改善预后,这与文献报道的病例一致。关键词COVID-19;脑梗塞;减压开颅术;高凝状态。
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引用次数: 0
Tumor de Buschke-Löwenstein en el embarazo adolescente 青春期妊娠布施克-洛文斯坦肿瘤
Pub Date : 2024-01-10 DOI: 10.22201/fm.24484865e.2024.67.1.04
Alejandra Ivonne Sotres Guerrero, José Emmanuel Adame Caballero
Background: Buschke-Löwenstein tumor also called giant condyloma acuminatum is a rare condition due to the human papillomavirus with an incidence of 0.01% and just 6 cases reported in pregnancy. There is no consensus on the treatment, although surgery has been the most reported.
背景:布施克-洛文斯坦瘤又称巨型尖锐湿疣,是由人类乳头瘤病毒引起的一种罕见疾病,发病率为 0.01%,仅有 6 例报告称其发生在妊娠期。虽然手术是目前报道最多的治疗方法,但在治疗方法上还没有达成共识。
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引用次数: 0
Metahemoglobinemia Congénita. Reporte de un caso 先天性高铁血红蛋白血症。病例报告
Pub Date : 2024-01-10 DOI: 10.22201/fm.24484865e.2024.67.1.03
Karla Gutiérrez-Riverol, Karla Guadalupe Lozada Rosete, Juan José Dosta Herrera, Agles Cruz Avelar
Methemoglobinemia occasionally causes cyanosis particularly in congenitalmethemoglobinemia. Avoidance of exposure to oxidizing agents is important for patients with congenital methemoglobinemia because of their deficient enzymatic pathways and decreased oxygen-carrying capacity. Here, we present a pediatric patient with preoperatively undiagnosed congenital methemoglobinemia who underwent catheterization with probably diagnosis of pulmonary hypertension under general anesthesia. The pediatric patient was a 10-year-old who displayed a low pulse oximetry reading of 92% prior to induction of anesthesia. Methemoglobinemia was first suspected intraoperatively because of a mismatch of SpO 2 of finger pulse oximetry and SaO 2 of arterial blood and was later confirmed by multiple wavelength. CO-oximetry. The pathophysiology, etiology, clinical manifestations, anesthetic considerations, and treatment options of methemoglobinemia are discussed.Key words: methemoglobinemia, cyanosis, anesthesia, pulse oximetry, pediatric patient.
高铁血红蛋白血症偶尔会导致发绀,尤其是先天性高铁血红蛋白血症。由于先天性高铁血红蛋白血症患者酶途径不足,携氧能力下降,因此避免接触氧化剂对他们来说非常重要。在此,我们介绍一名术前未确诊为先天性高铁血红蛋白血症的儿科患者,该患者在全身麻醉下接受了导管检查,可能被诊断为肺动脉高压。这名儿童患者年仅 10 岁,麻醉诱导前脉搏血氧饱和度低至 92%。由于手指脉搏血氧仪的 SpO 2 与动脉血的 SaO 2 不匹配,术中首先怀疑为高铁血红蛋白血症,随后通过多个波长的 CO-氧饱和度测量得到证实。一氧化碳氧饱和度。本文讨论了高铁血红蛋白症的病理生理学、病因学、临床表现、麻醉注意事项和治疗方案。
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引用次数: 0
Enfermedad de Castleman: un enfoque integral a propósito de un reporte de caso 卡斯特曼病:基于病例报告的综合治疗方法
Pub Date : 2024-01-10 DOI: 10.22201/fm.24484865e.2024.67.1.05
Armando Vergara Bolaño, Paula Andrea León Sierra, Jesús Ángel Villagrán Uribe, Marisol Galván Navarrete
The clinical case of a 30-year-old female patient with supraclavicular and ipsilateral axillary lymphadenopathy who underwent excisional biopsy with subsequent study is presented. Histopathological analysis of the resected tissue sample revealed a series of distinctive features associated with hyaline vascular variant Castleman disease. The presentation of this case not only provides detailed information about the clinical evolution of the patient, but also serves as a basis to illustrate Key aspects of histopathological is and immunohistochemical implications in Castleman disease. In addition to making a review of the topic regarding this rare pathology in which case reports are essential to increase the understanding of its clinical variability and its diagnostic approach, illustrating the challenges in differential diagnosis and how they should be addressed. Key words: CASTLEMAN, LYMPHOMA, LYMPHADENOPATHY, HYALINE VASCULAR, PLASMA CELLS
本文介绍了一名 30 岁女性患者的临床病例,她患有锁骨上和同侧腋窝淋巴结病,接受了切除活检和后续研究。切除组织样本的组织病理学分析显示了一系列与透明血管变异型 Castleman 病相关的显著特征。本病例的介绍不仅提供了患者临床演变的详细信息,还为说明卡斯特曼病组织病理学的关键方面和免疫组化的意义提供了依据。此外,还对这一罕见病理进行了专题综述,其中病例报告对提高人们对其临床变异性及其诊断方法的认识至关重要,说明了鉴别诊断中的挑战以及应如何应对这些挑战。关键字卡斯特曼、淋巴瘤、淋巴结病、透明血管、浆细胞
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引用次数: 0
Resultados de edad ósea obtenida mediante método de Greulich y Pyle versus software automatizado BoneXpert 用 Greulich 和 Pyle 方法得出的骨龄结果与 BoneXpert 自动软件得出的骨龄结果对比。
Pub Date : 2023-11-20 DOI: 10.37345/23045329.v1i35.105
José Antonio Robledo López
Introducción: La edad ósea es un parámetro importante para la determinación del desarrollo esquelético del ser humano, la misma es determinada manualmente mediante el método de Greulich y Pyle. Lo mismo hace que la obtención de edad ósea sea poco práctica. Programas y aplicaciones de inteligencia artificial han sido desarrollados con el objetivo de optimizar la lectura de edad ósea, uno de ellos es el software automatizado de BoneXpert (BE). Estudios científicos han determinado la eficacia de dicho método al ser comparado con el método convencional de Greulich y Pyle, lo que favorece su uso en la práctica clínica cotidiana. Objetivo: Correlacionar resultados de edad ósea obtenida mediante método de Greulich y Pyle versus software automatizado BoneXpert. Métodos: Estudio descriptivo, retrospectivo, realizado con radiografías de mano disponibles en la base de datos del Hospital Herrera Llerandi. Se utilizaron radiografías con informes de edad ósea disponibles de 2021 a 2022. Resultados: Se incluyeron 20 casos, 9 de sexo femenino (45%) y 11 de sexo masculino (55%), la media de edad cronológica fue de 8.98 años. La correlación entre la edad ósea por método convencional (GP) y la edad ósea mediante software automatizado (BE) fue de 0.978 sugiriendo una correlación alta. Se concluye que del software automatizado de BoneXpert posee una alta precisión diagnóstica al ser comparada con el método convencional de Greulich y Pyle, otorgándole la virtud de poder ser utilizada como herramienta diagnóstica. Palabras Clave: Edad ósea, Greulich y Pyle, BoneXpert, Correlación de edad ósea, Inteligencia Artificial
导言:骨龄是确定人体骨骼发育的一个重要参数,而骨龄是通过格劳里奇和派尔法手工确定的。这使得获取骨龄变得不切实际。为了优化骨龄的读取,人们开发了人工智能程序和应用程序,其中之一就是自动 BoneXpert(BE)软件。科学研究表明,这种方法与传统的 Greulich 和 Pyle 方法相比效果显著,因此更适合在日常临床实践中使用。目的:比较使用 Greulich 和 Pyle 方法与自动 BoneXpert 软件得出的骨龄结果。方法:使用 Herrera Llerandi 医院数据库中的手部 X 光片进行描述性、回顾性研究。研究使用了 2021 年至 2022 年的骨龄报告。结果:共纳入 20 个病例,其中女性 9 例(占 45%),男性 11 例(占 55%),平均实际年龄为 8.98 岁。传统方法得出的骨龄(GP)与自动软件得出的骨龄(BE)之间的相关性为 0.978,表明两者之间存在高度相关性。结论是,BoneXpert 自动软件与 Greulich 和 Pyle 的传统方法相比,具有很高的诊断准确性,可作为诊断工具使用。关键词: 骨龄、Greulich 和 Pyle、BoneXpert、骨龄相关性、人工智能。
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引用次数: 0
De todo y de nada un poco 什么都有,什么都没有
Pub Date : 2023-11-20 DOI: 10.37345/23045329.v1i35.109
Marco Antonio Peñalonzo Bendfeldt
Editorial.
社论
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引用次数: 0
期刊
Revista de la Facultad de Medicina
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