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Biophysical Approach to Understand Life and Cancer 用生物物理方法理解生命和癌症
Pub Date : 2024-09-11 DOI: 10.1002/aac2.12075
Nuri Faruk Aykan

Background

From the perspective of biology, the characteristics of life can be categorized as cellular organizations, homeostasis, metabolism, growth, reproduction and heredity, response to stimuli and adaptation to the environment. From the perspective of physics, living organisms are highly ordered, complex, thermodynamically open systems; they are in non-equilibrium phase. According to the second law of thermodynamics, every system in the universe is going to the disorder spontaneously. Maximum entropy signifies a thermodynamic equilibrium which means the death. Today, cancer is a major global health problem and despite the explosive development of our knowledge about the carcinogenesis the “war on cancer” has not yet been won.

Aims

To examine life and cancer together based on current biophysical approach and to shed light on new paradigms.

Materials & Methods

A systematic literature search for publications on a thermodynamic approach to understand life and cancer was conducted in PubMed without language restrictions. The reference lists of identified studies were also used as additional knowledge.

Results

Living organisms exchange entropy and they gain information from the external environment. Information can be stored as memory. Life is a category of emergence like art composed from correct modules. On the contrary, cancer is the emergence of a disease formed by incorrect modules. Cancer is a chaotic disease at least for a limited period and cannot arise from healthy functional tissue units. Chaos of the lower level may be associated with the entropy increase of upper level.

Conclusions

Biologic chaos control is possible.

背景 从生物学的角度来看,生命的特征可分为细胞组织、平衡、新陈代谢、生长、繁殖和遗传、对刺激的反应和对环境的适应。从物理学的角度来看,生物体是高度有序、复杂、热力学开放的系统;它们处于非平衡阶段。根据热力学第二定律,宇宙中的每个系统都会自发地走向无序。最大熵意味着热力学平衡,也意味着死亡。今天,癌症是一个重大的全球健康问题,尽管我们对致癌的认识有了爆炸性的发展,但 "抗癌战争 "仍未取得胜利。 目的 基于当前的生物物理方法,研究生命与癌症的关系,并揭示新的范式。 材料与amp; 方法 在 PubMed 上进行了一次系统的文献检索,以查找关于用热力学方法理解生命和癌症的出版物,没有语言限制。此外,还参考了已发现研究的参考文献目录。 结果 生物体交换熵,并从外部环境中获取信息。信息可以作为记忆储存起来。生命是一种涌现,就像由正确模块组成的艺术。相反,癌症是一种由错误模块组成的疾病。癌症至少在一定时期内是一种混沌疾病,不可能从健康的功能组织单元中产生。下层的混沌可能与上层的熵增加有关。 结论 生物混沌控制是可能的。
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引用次数: 0
Considerations for the Use of the DNA Damage Marker γ-H2AX in Disease Modeling, Detection, Diagnosis, and Prognosis 在疾病建模、检测、诊断和预后中使用 DNA 损伤标记物 γ-H2AX 的注意事项
Pub Date : 2024-08-29 DOI: 10.1002/aac2.12074
Holly Hosking, Wayne Pederick, Paul Neilsen, Andrew Fenning

Background

DNA double-strand breaks are known to be the most lethal kind of DNA damage as they cause genomic instability. Visualization and quantification of these breaks are possible via staining of the phosphorylated histone H2A variant H2AX at serine 139 with the anti-phospho-histone H2AX (γ-H2AX) antibody.

Methods

The literature was searched with the following keywords: DNA damage, double-strand break, PBMC, DNA repair, H2AX, γ-H2AX.

Discussion

This review discusses various methods for the quantification of γ-H2AX and the use of γ-H2AX in cell culture, tissue biopsies, and peripheral blood mononuclear cells. The current research into basal DNA damage as quantified by γ-H2AX is discussed in relation to cancer.

Conclusions

This review suggests that γ-H2AX has the potential for use in the prediction of cancer risk when applied to healthy tissue and peripheral blood mononuclear cells.

背景众所周知,DNA 双链断裂是最致命的一种 DNA 损伤,因为它们会导致基因组不稳定。用抗磷酸组蛋白 H2AX(γ-H2AX)抗体对丝氨酸 139 处磷酸化的组蛋白 H2A 变体 H2AX 进行染色,可观察和量化这些断裂。 方法 以下列关键词搜索文献:DNA损伤、双链断裂、PBMC、DNA修复、H2AX、γ-H2AX。 讨论 本综述讨论了γ-H2AX 的各种定量方法以及γ-H2AX 在细胞培养、组织活检和外周血单核细胞中的应用。还讨论了目前通过 γ-H2AX 定量的基础 DNA 损伤与癌症的关系。 结论 本综述表明,γ-H2AX 有可能用于健康组织和外周血单核细胞的癌症风险预测。
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引用次数: 0
From Hyperinsulinemia to Cancer Progression: How Diminishing Glucose Storage Capacity Fuels Insulin Resistance 从高胰岛素血症到癌症进展:葡萄糖储存能力下降如何加剧胰岛素抵抗
Pub Date : 2024-08-27 DOI: 10.1002/aac2.12073
Irina Kareva

Background

Type 2 diabetes (T2D) is a complex metabolic disorder characterized by insulin resistance, hyperglycemia, and hyperinsulinemia. A significant portion of individuals with T2D are unaware of their condition until it has reached advanced stages. T2D is also associated with an increased risk and worse prognosis of cardiovascular disease, cognitive decline, and cancer. Understanding the mechanisms underlying the emergence of insulin resistance is critical for improving early detection and therapeutic interventions.

Methods

An updated framework is proposed to describe the emergence of insulin resistance that precedes the development of T2D. The model focuses on the impact of diminishing capacity to store excess glucose, which can occur due to a multitude of factors, including age-related muscle loss. The model is used to simulate responses to oral glucose tolerance tests (OGTTs) to capture the transition from a normal to a diabetic phenotype, as defined by the Kraft criteria. Additionally, the model is used to explore how the metabolic environment influences tumor progression, drawing on experimental data regarding the impact of transient diabetic phenotypes and hyperinsulinemia on cancer therapy efficacy.

Results

The model successfully demonstrates that reduced glucose storage capacity can qualitatively reproduce the progression from normal to diabetic phenotypes observed in OGTT responses. Furthermore, it shows that tumor progression or regression is highly dependent on the host's metabolic environment, particularly hyperinsulinemia. This aligns with experimental results that connect drug-induced hyperinsulinemia to a loss of therapeutic efficacy against tumors, whereas the reversal of the diabetic phenotype could restore drug sensitivity and treatment response.

Conclusions

This study highlights the critical role of hyperinsulinemia, even in normoglycemic individuals, in both the progression of T2D and the modulation of cancer therapy outcomes. Addressing hyperinsulinemia emerges as a promising strategy to enhance cancer treatment efficacy and improve overall health outcomes in patients with or at risk for T2D.

背景 2 型糖尿病(T2D)是一种复杂的代谢紊乱疾病,以胰岛素抵抗、高血糖和高胰岛素血症为特征。很大一部分 T2D 患者在病情发展到晚期时才意识到自己患病。此外,T2D 还与心血管疾病、认知能力下降和癌症的风险增加和预后恶化有关。了解胰岛素抵抗的产生机制对于改善早期检测和治疗干预至关重要。 方法 本文提出了一个最新的框架,用于描述胰岛素抵抗在 T2D 发生之前的出现过程。该模型的重点是储存过量葡萄糖的能力下降所产生的影响,这可能是由多种因素造成的,包括与年龄有关的肌肉流失。该模型用于模拟对口服葡萄糖耐量试验(OGTTs)的反应,以捕捉从正常到糖尿病表型的转变,正如卡夫标准所定义的那样。此外,该模型还用于探索代谢环境如何影响肿瘤进展,并借鉴了有关短暂糖尿病表型和高胰岛素血症对癌症疗效影响的实验数据。 结果 该模型成功证明,葡萄糖储存能力降低可定性地再现 OGTT 反应中观察到的从正常到糖尿病表型的进展。此外,它还表明肿瘤的进展或消退在很大程度上取决于宿主的代谢环境,尤其是高胰岛素血症。这与实验结果一致,即药物诱导的高胰岛素血症与肿瘤疗效丧失有关,而糖尿病表型的逆转可恢复药物敏感性和治疗反应。 结论 本研究强调了高胰岛素血症在 T2D 的发展和癌症治疗效果的调节中的关键作用,即使在血糖正常的个体中也是如此。解决高胰岛素血症问题是提高癌症治疗效果和改善 T2D 患者或高危患者总体健康状况的一种有前途的策略。
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引用次数: 0
The Gut Microbiome in Aging and Ovarian Cancer 衰老和卵巢癌中的肠道微生物组
Pub Date : 2024-06-20 DOI: 10.1002/aac2.12071
Gena M. Dominique, Catherine Hammond, M. Sharon Stack

The gut microbiome changes with age and affects regions beyond the gut, including the ovarian cancer tumor microenvironment. In this review summarizing the literature on the gut microbiome in ovarian cancer and in aging, we note trends in the microbiota composition common to both phenomena and trends that are distinctly opposite. Both ovarian cancer and aging are characterized by an increase in proinflammatory bacterial species, particularly those belonging to phylum Proteobacteria and genus Escherichia, and a decrease in short-chain fatty acid producers, particularly those in Clostridium cluster XIVa (family Lachnospiraceae) and the Actinobacteria genus Bifidobacterium. However, although beneficial bacteria from family Porphyromonadaceae and genus Akkermansia tend to increase with normal, healthy aging, these bacteria tend to decrease in ovarian cancer, similar to what is observed in obesity or unhealthy aging. We also note a lack in the current literature of research demonstrating causal relationships between the gut microbiome and ovarian cancer outcomes and research on the gut microbiome in ovarian cancer in the context of aging, both of which could lead to improvements to ovarian cancer diagnosis and treatment.

肠道微生物群会随着年龄的增长而变化,并影响肠道以外的区域,包括卵巢癌肿瘤微环境。在这篇综述中,我们总结了有关卵巢癌和衰老中肠道微生物组的文献,指出了这两种现象中微生物组组成的共同趋势和明显相反的趋势。卵巢癌和衰老的特征都是促炎症细菌种类的增加,特别是那些属于变形菌门和埃希氏菌属的细菌,而短链脂肪酸生产者的减少,特别是梭状芽孢杆菌属 XIVa 群(Lachnospiraceae 科)和放线菌属双歧杆菌中的细菌。不过,虽然卟啉单胞菌科(Porphyromonadaceae)和Akkermansia属(Akkermansia)中的有益细菌往往会随着正常、健康的衰老而增加,但这些细菌在卵巢癌中却会减少,这与肥胖或不健康衰老中观察到的情况类似。我们还注意到,目前的文献缺乏证明肠道微生物组与卵巢癌结果之间因果关系的研究,也缺乏对衰老背景下卵巢癌中的肠道微生物组的研究,而这两项研究都能改善卵巢癌的诊断和治疗。
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引用次数: 0
Trending toward gero-electroceuticals that target membrane potential for reprogramming aging and lifespan 以膜电位为目标的老年电疗药物是重塑衰老和寿命的大势所趋
Pub Date : 2024-06-08 DOI: 10.1002/aac2.12070
Siamak Tabibzadeh, Olen R. Brown

Ion gradients across cell membranes generate voltage potentials that are involved in a wide range of biological processes. According to the membrane hypothesis of aging, aging is inextricably linked to a decrease in resting membrane potential (Vmem). Alterations in ion channel activity and membrane fluidity caused by aging disrupt bioelectric homeostasis, increase intracellular calcium and potassium concentrations, induce abnormal mechanistic target of rapamycin (MTOR)- and AMPK-regulated metabolism and energy dissipation, and decrease proliferation and regeneration. Failure to maintain ion channel activity and membrane potential leads to cell senescence or death. There is evidence that by manipulating ion channel activities, a cryptic memory can be recalled to restore lost proliferative or regenerative abilities. Reversal or prevention of senescence, aging phenotypes, and longevity may be achieved by fine-tuning mitochondrial membrane polarization. Therefore, there is optimism that deciphering the bioelectric codes that govern cell functions will lead to the development of new gero-electroceuticals that restore cell function and prevent tissue loss during aging.

细胞膜上的离子梯度会产生电压电位,这些电压电位与多种生物过程有关。根据膜衰老假说,衰老与静息膜电位(Vmem)的降低密不可分。衰老引起的离子通道活性和膜流动性的改变会破坏生物电平衡,增加细胞内钙和钾的浓度,诱发雷帕霉素机制靶标(MTOR)和 AMPK 调节的新陈代谢和能量消耗异常,并减少增殖和再生。无法维持离子通道活性和膜电位会导致细胞衰老或死亡。有证据表明,通过操纵离子通道活性,可以唤醒隐性记忆,恢复失去的增殖或再生能力。通过微调线粒体膜极化,可以逆转或防止衰老、老化表型和长寿。因此,人们乐观地认为,破译细胞功能的生物电密码将开发出新的老年电疗药物,以恢复细胞功能并防止衰老过程中的组织损失。
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引用次数: 0
Risk factors for suicide in patients with pancreatic ductal adenocarcinoma: A population-based study 胰腺导管腺癌患者自杀的风险因素:一项基于人群的研究
Pub Date : 2024-03-23 DOI: 10.1002/aac2.12069
Chao Wang, Haoda Chen, Yuanchi Weng, Xiaxing Deng, Weishen Wang, Baiyong Shen

Background

Patients diagnosed with pancreatic ductal adenocarcinoma (PDAC) face a notable risk of suicide. However, comprehensive population-based studies on suicide risk in PDAC patients have been lacking. This study seeks to explore the suicide risk in PDAC patients and identify the specific risk factors associated with suicide-related mortality.

Methods

A cohort of 101,382 PDAC patients was extracted from the Surveillance, Epidemiology, and End Results database, spanning from January 1, 2000, to December 31, 2017. The study employed the standardized mortality ratio (SMR) to assess the relative risk of suicide in PDAC patients compared to the general US population. The Nelson–Aalen estimator and the Fine and Grey method were utilized to pinpoint the risk factors linked to suicide-specific mortality.

Results

PDAC patients exhibited a 3.51-fold higher risk of suicide compared to the general US population. This risk demonstrated an upward trend over the years. Notably, individuals aged 70–74 years faced a significantly elevated risk of suicide (SMR = 5.14, 95% CI: 3.10–8.03). Furthermore, there were distinct peaks in suicide risk at 1–4- and 25–28-month post-diagnoses (SMR = 15.04 and 2.72, respectively). Factors, such as gender, chemotherapy status, and marital status, emerged as significant independent predictors of suicide-specific mortality in PDAC patients.

Conclusions

This study highlights a heightened suicide risk among PDAC patients in comparison to the general US population. It underscores the crucial need for continuous monitoring of the psychological well-being of all PDAC patients. Additionally, considering the elevated risk, the application of antidepressant therapy could be beneficial for those identified as having a higher risk of suicide.

被诊断为胰腺导管腺癌(PDAC)的患者面临着显著的自杀风险。然而,目前还缺乏有关 PDAC 患者自杀风险的综合性人群研究。本研究旨在探讨PDAC患者的自杀风险,并确定与自杀相关死亡率相关的特定风险因素。研究人员从监测、流行病学和最终结果数据库中提取了101,382名PDAC患者,时间跨度为2000年1月1日至2017年12月31日。研究采用标准化死亡率(SMR)来评估PDAC患者与美国普通人群相比的相对自杀风险。研究采用了Nelson-Aalen估算器和Fine and Grey方法来确定与自杀特异性死亡率相关的风险因素。PDAC患者的自杀风险是美国普通人群的3.51倍。这一风险呈逐年上升趋势。值得注意的是,70-74 岁人群的自杀风险明显升高(SMR = 5.14,95% CI:3.10-8.03)。此外,在确诊后 1-4 个月和 25-28 个月,自杀风险出现明显高峰(SMR = 15.04 和 2.72)。性别、化疗状态和婚姻状况等因素成为 PDAC 患者自杀特异性死亡率的重要独立预测因素。这项研究强调,与美国普通人群相比,PDAC 患者的自杀风险更高,因此必须持续监测所有 PDAC 患者的心理健康状况。此外,考虑到风险的升高,抗抑郁治疗的应用可能对那些被确认为自杀风险较高的患者有益。
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引用次数: 0
Promoting longevity with less cancer: The 2022 International Conference on Aging and Cancer 促进少癌长寿:2022年老龄化与癌症国际会议
Pub Date : 2023-10-28 DOI: 10.1002/aac2.12068
Yan Cui, Kai Wang, Danli Jiang, Yizhou Jiang, Dawei Shi, James DeGregori, Samuel Waxman, Ruibao Ren
Abstract Aging and cancer are increasingly becoming big challenges for public health worldwide due to increased human life expectancy. Meanwhile, aging is one of the major risk factors for cancer. In December 2019, the first International Conference on Aging and Cancer was held in Haikou, Hainan province (island), China, preluding the establishment of the International Center for Aging and Cancer (ICAC) at Hainan, an institute dedicated to the research at the intersection of aging and cancer. Since then, the ICAC has hosted the annual conference each December in Hainan. The 2022 ICAC conference, with the theme of “promoting longevity with less cancer,” invited 17 internationally renowned scientists to share their new research and insights. Topics included DNA methylation in rejuvenation, development, and cellular senescence; lifespan regulation and longevity manipulation; metabolism and aging; cellular senescence and diseases; and novel therapeutics for cancer and antiaging/anticancer drug discovery. The forum highlighted the interconnectedness of aging and senescence with cancer evolution and risk. Although there is hope for preventing diseases like cancer by modulating systems that also control lifespan, attention has to be paid to the conflicting needs and competing demands in human biology.
随着人类预期寿命的延长,老龄化和癌症日益成为全球公共卫生面临的重大挑战。同时,衰老是癌症的主要危险因素之一。2019年12月,首届老龄化与癌症国际会议在中国海南省(岛)海口市召开,海南成立了致力于老龄化与癌症交叉研究的国际老龄化与癌症中心(ICAC)。此后,廉署每年12月在海南举办年会。以“少患癌症,长寿”为主题的2022年廉政公署会议,邀请了17位国际知名科学家分享他们的新研究和见解。主题包括DNA甲基化在恢复活力,发育和细胞衰老;寿命调节与寿命操纵;新陈代谢与衰老;细胞衰老与疾病;癌症的新疗法和抗衰老/抗癌药物的发现。该论坛强调了衰老和衰老与癌症演变和风险的相互联系。虽然有希望通过调节控制寿命的系统来预防癌症等疾病,但必须注意人类生物学中相互冲突的需求和相互竞争的需求。
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引用次数: 0
Detecting cellular senescence in vivo: Imagining imaging better 在体内检测细胞衰老:更好地想象成像
Pub Date : 2023-08-02 DOI: 10.1002/aac2.12067
Zachary M. Rabinowitz, Lina Cui
Methods to detect cellular senescence have become increasingly important, even more so in living animals and humans. This cellular state has been found to play fundamental roles in physiological processes as well as functioning detrimentally toward the advent or progression of pathological conditions. Importantly, the study of senescence involvement in these processes in vivo cannot be done without living‐friendly technologies enabling senescence detection. Furthermore, senotherapies or therapies that selectively kill senescent cells have emerged as a new therapeutic strategy for aging and age‐related diseases such as atherosclerosis, cancer, and neurodegenerative disorders and require tools to evaluate their use in vivo. As of now, our in vivo senescence detection toolkit includes genetically engineered reporter mouse models and small molecule imaging probes. Herein, we will focus on the detection of senescence in vivo, including a summary of its challenges, current detection methods and strategies, and a perspective on overcoming the current obstacles.
检测细胞衰老的方法变得越来越重要,在活体动物和人类中更是如此。这种细胞状态已被发现在生理过程中发挥基本作用,以及对病理条件的出现或进展起不利作用。重要的是,如果没有对生命友好的衰老检测技术,就无法在体内进行衰老参与这些过程的研究。此外,选择性杀死衰老细胞的疗法已经成为治疗衰老和年龄相关疾病(如动脉粥样硬化、癌症和神经退行性疾病)的新策略,需要工具来评估其在体内的应用。到目前为止,我们的体内衰老检测工具包包括基因工程报告小鼠模型和小分子成像探针。在此,我们将重点关注体内衰老的检测,包括总结其挑战,当前的检测方法和策略,以及克服当前障碍的观点。
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引用次数: 0
Predictive factors and diagnostic significance of CT findings for anastomotic leak after gastric cancer surgery: A retrospective analysis 胃癌术后吻合口瘘CT表现的预测因素及诊断意义回顾性分析
Pub Date : 2023-07-21 DOI: 10.1002/aac2.12066
Birendra Kumar Sah, Yang Zhang, Jian Li, Chen Li, Huan Zhang, Min Yan, Zheng Gang Zhu

Background

Anastomotic leak following radical gastrectomy poses a significant risk to patients. Despite previous studies, effective methods for diagnosing anastomotic leaks after gastric cancer surgery remain elusive. In this study, we aimed to assess the overall burden of anastomotic leaks and investigate diagnostic factors, particularly radiological signs on postoperative computed tomography (CT), that may facilitate early detection.

Methods

We included a total of 70 gastric cancer patients who underwent curative gastrectomy and underwent CT examination post-surgery. Among them, 35 patients with anastomotic leak were matched with 35 patients without anastomotic leak. We compared the rates of various types of postoperative complications between the two groups and conducted univariate and multivariate analyses to identify predictive variables for postoperative diagnosis.

Results

Patients with anastomotic leaks experienced significantly longer postoperative hospital stays and higher overall expenditures (p < 0.001). Logistic regression analysis revealed that extraluminal gas at the anastomosis site, fever (T ≥ 38.5°C), and neutrophilia (NE ≥ 78%) on postoperative days 4–7 were independent diagnostic factors for anastomotic leaks (p < 0.05).

Conclusions

The diagnostic factors identified in this study offer valuable insights into early detection of anastomotic leaks. We recommend early CT examination for patients exhibiting consistent fever and neutrophilia between postoperative days 4 and 7 following gastric cancer surgery.

根治性胃切除术后吻合口漏对患者有很大的风险。尽管已有研究,但诊断胃癌术后吻合口瘘的有效方法仍然难以找到。在本研究中,我们旨在评估吻合口瘘的总体负担,并探讨可能有助于早期发现的诊断因素,特别是术后计算机断层扫描(CT)的放射学征象。
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引用次数: 0
Acute myeloid leukemia in elderly patients: New targets, new therapies 老年急性髓性白血病:新靶点,新疗法
Pub Date : 2023-05-22 DOI: 10.1002/aac2.12065
Hae J. Park, Mark A. Gregory

Prior to the past few years, the development of new therapies for acute myeloid leukemia (AML) has been disappointingly slow. For several decades, the standard therapy for AML has consisted of intensive induction chemotherapy, and potentially a subsequent hematopoietic stem cell transplant. Unfortunately, older patients are less responsive to, and are frequently unfit to tolerate, such intensive chemotherapy. Given that a majority of AML patients are elderly, this population has been most affected by the lack of newer less toxic therapies. However, in recent years, the treatment landscape for AML has dramatically shifted with the approval of many new drugs. As summarized in this review, several of these new drugs are targeted agents that are better tolerated than standard chemotherapy and could substantially benefit elderly patients. Although drug resistance remains a major concern, the treatment options for elderly AML patients are more numerous than ever before, bringing new promise for improved patient outcomes.

在过去的几年里,治疗急性髓细胞白血病(AML)的新疗法的开发进展缓慢,令人失望。几十年来,AML的标准治疗方法包括强化诱导化疗,以及可能的后续造血干细胞移植。不幸的是,老年患者对这种强化化疗的反应较差,而且往往不适合耐受。鉴于大多数AML患者是老年人,这一人群受到的影响最大,因为缺乏新的低毒疗法。然而,近年来,随着许多新药的批准,AML的治疗格局发生了巨大变化。正如这篇综述所总结的,这些新药中有几种是靶向药物,比标准化疗耐受性更好,可以显著造福老年患者。尽管耐药性仍然是一个主要问题,但老年AML患者的治疗选择比以往任何时候都多,为改善患者预后带来了新的希望。
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引用次数: 0
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Aging and cancer
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