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Isotschimgine promotes lifespan, healthspan and neuroprotection of Caenorhabditis elegans via the activation of nuclear hormone receptors. 异噻嗪通过激活核激素受体促进秀丽隐杆线虫的寿命、健康和神经保护。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-29 DOI: 10.1007/s10522-024-10142-6
Hang Shi, Xiaoyan Gao, Jing Yu, Lijun Zhang, Bingbing Fan, Ying Liu, Xinyi Wang, Shengjie Fan, Cheng Huang

Isotschimgine (ITG) is a bornane-type monoterpenoid derivative naturally occurring in genus Ferula plants and propolis. Its effects on aging and the underlying mechanisms are not yet well understood. This study employed Caenorhabditis elegans (C. elegans) as a model organism to evaluate the potential of ITG in extending lifespan, enhancing healthspan, and promoting neuroprotection, while exploring the underlying mechanisms involved. The results showed that ITG extended the lifespan and healthspan of C. elegans, significantly enhanced stress resistance and detoxification functions. Studies on mutants and qPCR data indicated that ITG-mediated lifespan extension was modulated by the insulin/IGF-1 signaling pathway and nuclear hormone receptors. Furthermore, ITG markedly increased stress-responsive genes, including daf-16 and its downstream genes sod-3 and hsp-16.2, as well as NHR downstream detoxification-related genes cyp35a1, cyp35b3, cyp35c1, gst-4, pgp-3 and pgp-13. Additionally, ITG alleviated β-amyloid-induced paralysis and behavioral dysfunction in transgenic C. elegans strains. The neuroprotective efficacy of ITG was weakened by RNAi knockdown of nuclear hormone receptors daf-12 and nhr-8. Overall, our study identifies ITG as a potential compound for promoting longevity and neuroprotection, mediated through nuclear hormone receptors.

异苦参碱(ITG)是一种天然存在于阿魏属植物和蜂胶中的生番烷类单萜衍生物。它对衰老的影响及其内在机制尚不十分清楚。本研究以秀丽隐杆线虫(C. elegans)为模式生物,评估 ITG 在延长寿命、延长健康寿命和促进神经保护方面的潜力,同时探索其潜在机制。研究结果表明,ITG能延长秀丽隐杆线虫的寿命和健康寿命,显著增强其抗应激能力和解毒功能。对突变体的研究和qPCR数据表明,ITG介导的寿命延长受胰岛素/IGF-1信号通路和核激素受体的调控。此外,ITG明显增加了应激反应基因,包括daf-16及其下游基因sod-3和hsp-16.2,以及NHR下游解毒相关基因cyp35a1、cyp35b3、cyp35c1、gst-4、pgp-3和pgp-13。此外,ITG 还能缓解β-淀粉样蛋白诱导的转基因优雅小鼠瘫痪和行为功能障碍。核激素受体daf-12和nhr-8的RNAi敲除削弱了ITG的神经保护功效。总之,我们的研究发现 ITG 是一种通过核激素受体介导的促进长寿和神经保护的潜在化合物。
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引用次数: 0
The evolution of ageing: classic theories and emerging ideas. 老龄化的演变:经典理论与新兴观点。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-29 DOI: 10.1007/s10522-024-10143-5
Mark T Mc Auley

Ageing is generally regarded as a non-adaptive by-product of evolution. Based on this premise three classic evolutionary theories of ageing have been proposed. These theories have dominated the literature for several decades. Despite their individual nuances, the common thread which unites them is that they posit that ageing results from a decline in the intensity of natural selection with chronological age. Empirical evidence has been identified which supports each theory. However, a consensus remains to be fully established as to which theory best accounts for the evolution of ageing. A consequence of this uncertainty are counter arguments which advocate for alternative theoretical frameworks, such as those which propose an adaptive origin for ageing, senescence, or death. Given this backdrop, this review has several aims. Firstly, to briefly discuss the classic evolutionary theories. Secondly, to evaluate how evolutionary forces beyond a monotonic decrease in natural selection can affect the evolution of ageing. Thirdly, to examine alternatives to the classic theories. Finally, to introduce a pluralistic interpretation of the evolution of ageing. The basis of this pluralistic theoretical framework is the recognition that certain evolutionary ideas will be more appropriate depending on the organism, its ecological context, and its life history.

衰老一般被认为是进化的非适应性副产品。基于这一前提,人们提出了三种经典的老龄化进化理论。几十年来,这些理论一直在文献中占据主导地位。尽管这些理论各有细微差别,但它们的共同点是都认为衰老是自然选择的强度随年龄增长而下降的结果。每种理论都有支持的经验证据。然而,对于哪种理论最能解释老龄化的演变,目前还没有完全达成共识。这种不确定性的一个后果是出现了主张采用其他理论框架的反驳论点,例如那些提出老化、衰老或死亡是适应性起源的理论。在此背景下,本综述有几个目的。首先,简要讨论经典的进化理论。其次,评估自然选择单调减少之外的进化力量如何影响衰老的进化。第三,研究经典理论的替代方案。最后,介绍老龄化进化的多元解释。这一多元理论框架的基础是认识到,根据生物体、其生态环境和生命史的不同,某些进化观点会更加合适。
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引用次数: 0
High-quality dietary protein (essential amino acids matched to reproductive needs) partially breaks the lifespan and reproduction trade-off in lubber grasshoppers. 优质膳食蛋白质(与繁殖需求相匹配的必需氨基酸)部分打破了蚱蜢寿命与繁殖之间的平衡。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-29 DOI: 10.1007/s10522-024-10144-4
Emma Kordek, Amaya Yip, Alicia Horton, Hope Sohn, Nicholas Strasser, Maya Makhtin, John Hatle

Finding interventions to break the trade-off between reproduction and lifespan can provide insight into physiological limitations of animals. Effects of dietary protein quality on the trade-off are currently unclear, but clarity could lead to better designed diets that match animal needs. Dietary amino acid blends matching yolk proteins support reproduction and extend lifespan in fruit flies. To test if this is conserved across species, we matched dietary amino acids to vitellogenin to test reproduction and lifespan in adult females of the lubber grasshopper. Specifically, we compared varying degrees of protein quality by manipulating dietary essential amino acids. We identified a high-quality protein diet (amino acids matched to vitellogenin, or reproductive needs) that increased reproduction and matched lifespan in comparison to diets that differed only in the ratios of essential amino acids (i.e., were isocaloric and isonitrogenous). All these diets had longer lifespan but lower reproductive output than fully fed controls. In a separate experiment, full reproduction was possible on the high-quality artificial diet when offered at a 78% higher protein quantity and with a larger lettuce supplement (~ 17% of ad libitum). Additionally, we observed that as dietary protein quality was decreased (i.e., diets were less matched to vitellogenin), reproduction was reduced, and lifespan was extended in the more extreme scenarios. Taken together, these results indicate that the balance of dietary essential amino acids plays an important role in the lifespan and reproduction trade-off, while more work needs to be conducted to find the optimal diet mix for this species.

寻找干预措施来打破繁殖与寿命之间的权衡,可以让人们深入了解动物的生理限制。膳食蛋白质质量对权衡的影响目前尚不清楚,但清楚后可以更好地设计符合动物需求的膳食。与卵黄蛋白相匹配的膳食氨基酸混合物可支持果蝇的繁殖并延长其寿命。为了测试这一点在不同物种间是否一致,我们将膳食氨基酸与卵黄素相匹配,以测试蚱蜢成年雌性的繁殖和寿命。具体来说,我们通过调节膳食必需氨基酸来比较不同程度的蛋白质质量。我们确定了一种优质蛋白质日粮(氨基酸与卵黄素或生殖需求相匹配),与仅在必需氨基酸比例上存在差异(即等热量和等氮量)的日粮相比,这种日粮可提高繁殖率并延长寿命。与完全喂养的对照组相比,所有这些日粮的寿命都更长,但繁殖量却更低。在另一项实验中,优质人工日粮的蛋白质含量比普通日粮高出 78%,并且添加了更多的莴苣(约为自由摄入量的 17%),可实现完全繁殖。此外,我们还观察到,随着日粮蛋白质质量的降低(即日粮与卵黄素的匹配度降低),繁殖率降低,而在更极端的情况下,寿命延长。总之,这些结果表明,日粮中必需氨基酸的平衡在寿命和繁殖的权衡中起着重要作用,同时还需要开展更多的工作来找到该物种的最佳日粮组合。
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引用次数: 0
A novel (-)-(2S)-7,4'-dihydroxyflavanone compound for treating age-related diabetes mellitus through immunoinformatics-guided activation of CISD3. 一种新型(-)-(2S)-7,4'-二羟基黄烷酮化合物,可通过免疫制剂引导激活 CISD3 治疗老年性糖尿病。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-29 DOI: 10.1007/s10522-024-10147-1
Abdur-Rehman Munir, Saad Ilyas Baig, Muhammad Asif Razzaq, Fatima Rauf, Yasir Ali, Syed Muhammad Abdullah Azam

The iron-sulfur domain (CISD) proteins of CDGSH are classified into three classes: CISD1, CISD2, and CISD3. During premature ageing, mutations that affect these proteins, namely their binding sites, could result in reduced protein production and an inability to preserve cellular integrity. Consequently, this leads to the development of conditions such as diabetes. Notably, CISD3 plays a crucial role in the management of age-related disorders such as Wolfram syndrome, which is often referred to as DIDMOAD (diabetes insipidus, diabetes mellitus, optic atrophy, and deafness). Computational analyses have predicted that CISD3 regulates the redox state, safeguards the endoplasmic reticulum and mitochondria, and maintains intracellular calcium levels. CISD3, a member of a recently discovered gene family associated with the CDGSH iron protein apoptotic compensatory response, fulfils a crucial function in mitigating the effects of accelerated ageing. The compound "(-)-(2S)-7,4'-Dihydroxyflavanone" has been discovered by computational drug design as a possible activator of CISD3. It shows potential therapeutic benefits in ameliorating metabolic dysfunction and enhancing glucose regulation. The ligand binds to the binding pocket of the CISD3 protein, increasing the stability of the protein and enhancing its functionality. The current research investigates the binding processes of the molecule in various structures and its anticipated effects on these tissues, therefore providing valuable insights into the mitigation of age-related diabetes and metabolic dysfunction. The projected tripling of the worldwide population of individuals aged 50 and above by 2050 necessitates the urgent development of immunoinformatics-based approaches, including pharmaceutical therapies that target CISD3, to prevent age-related pathologies. The stimulation of CISD3, namely by compounds such as "(-)-(2S)-7,4'-Dihydroxyflavanone", has the potential to counteract telomere shortening and improve metabolic pathways.

CDGSH 的铁硫结构域(CISD)蛋白分为三类:CISD1、CISD2 和 CISD3。在过早衰老的过程中,影响这些蛋白质(即它们的结合位点)的突变会导致蛋白质生成减少,无法保持细胞的完整性。因此,会导致糖尿病等疾病的发生。值得注意的是,CISD3 在治疗沃尔夫拉姆综合征等与年龄有关的疾病中发挥着至关重要的作用,这种综合征通常被称为 DIDMOAD(糖尿病、糖尿病、视神经萎缩和耳聋)。计算分析预测,CISD3 可调节氧化还原状态,保护内质网和线粒体,并维持细胞内的钙水平。CISD3 是最近发现的与 CDGSH 铁蛋白凋亡补偿反应有关的基因家族的成员,在减轻加速衰老的影响方面发挥着至关重要的作用。通过计算药物设计发现的化合物"(-)-(2S)-7,4'-二羟基黄烷酮 "可能是 CISD3 的激活剂。它在改善代谢功能障碍和加强葡萄糖调节方面显示出潜在的治疗效果。该配体可与 CISD3 蛋白的结合袋结合,从而提高蛋白质的稳定性并增强其功能。目前的研究调查了该分子在各种结构中的结合过程及其对这些组织的预期影响,从而为缓解与年龄有关的糖尿病和代谢功能障碍提供了宝贵的见解。预计到 2050 年,全球 50 岁及以上人口将增加三倍,因此迫切需要开发基于免疫信息学的方法,包括针对 CISD3 的药物疗法,以预防与年龄有关的病症。(-)-(2S)-7,4'-二羟基黄烷酮 "等化合物对 CISD3 的刺激有可能抵消端粒缩短并改善代谢途径。
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引用次数: 0
Decoding the impact of ageing and environment stressors on skin cell communication. 解码老化和环境压力对皮肤细胞通讯的影响。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-29 DOI: 10.1007/s10522-024-10145-3
Alessandra V S Faria, Sheila Siqueira Andrade

The integumentary system serves as a crucial protective barrier and is subject to complex signaling pathways that regulate its physiological functions. As the body's first line of defense, the skin is continuously exposed to environmental stressors, necessitating a robust network of signaling molecules to maintain homeostasis. Considering the main cellular components to be keratinocytes, melanocytes, fibroblasts, and fibrous components, collagen of various types, this review explores the intricate signaling mechanisms that govern skin integrity, focusing on key pathways involved in impacts of ageing and environment factors on skin health. The role of growth factors, cytokines, hormones and other molecular mediators in these processes is examined. Specially for women, decrease of estrogen is determinant to alter signaling and to compromise skin structure, especially the dermis. Environmental factors, such as ultraviolet rays and pollution alongside the impact of ageing on signaling pathways, especially TGF-β and proteases (metalloproteinases and cathepsins). Furthermore, with advancing age, the skin's capacity to shelter microbiome challenges diminishes, leading to alterations in signal transduction and subsequent functional decline. Understanding these age-related changes is essential for developing targeted therapies aimed at enhancing skin health and resilience, but also offers a promising avenue for the treatment of skin disorders and the promotion of healthy ageing.

皮肤是人体重要的保护屏障,其生理功能受复杂信号通路的调控。作为人体的第一道防线,皮肤不断暴露在环境压力下,需要一个强大的信号分子网络来维持体内平衡。考虑到皮肤的主要细胞成分是角质形成细胞、黑色素细胞、成纤维细胞和纤维成分,即各种类型的胶原蛋白,本综述将探讨支配皮肤完整性的复杂信号机制,重点关注老化和环境因素对皮肤健康影响的关键途径。研究了生长因子、细胞因子、激素和其他分子介质在这些过程中的作用。特别是对女性而言,雌激素的减少是改变信号传递和损害皮肤结构(尤其是真皮层)的决定性因素。紫外线和污染等环境因素与老化对信号通路的影响并存,尤其是 TGF-β 和蛋白酶(金属蛋白酶和嗜酪蛋白酶)。此外,随着年龄的增长,皮肤抵御微生物群挑战的能力也会减弱,从而导致信号转导的改变和随后的功能衰退。了解这些与年龄有关的变化对于开发旨在增强皮肤健康和复原力的靶向疗法至关重要,同时也为治疗皮肤疾病和促进健康老龄化提供了一条前景广阔的途径。
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引用次数: 0
The dynamic crosslinking between gut microbiota and inflammation during aging: reviewing the nutritional and hormetic approaches against dysbiosis and inflammaging. 衰老过程中肠道微生物群与炎症之间的动态交叉联系:回顾对抗菌群失调和炎症的营养和激素方法。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-23 DOI: 10.1007/s10522-024-10146-2
Sakshi Chaudhary, Pardeep Kaur, Thokchom Arjun Singh, Kaniz Shahar Bano, Ashish Vyas, Alok Kumar Mishra, Prabhakar Singh, Mohammad Murtaza Mehdi

The early-life gut microbiota (GM) is increasingly recognized for its contributions to human health and disease over time. Microbiota composition, influenced by factors like race, geography, lifestyle, and individual differences, is subject to change. The GM serves dual roles, defending against pathogens and shaping the host immune system. Disruptions in microbial composition can lead to immune dysregulation, impacting defense mechanisms. Additionally, GM aids digestion, releasing nutrients and influencing physiological systems like the liver, brain, and endocrine system through microbial metabolites. Dysbiosis disrupts intestinal homeostasis, contributing to age-related diseases. Recent studies are elucidating the bacterial species that characterize a healthy microbiota, defining what constitutes a 'healthy' colonic microbiota. The present review article focuses on the importance of microbiome composition for the development of homeostasis and the roles of GM during aging and the age-related diseases caused by the alteration in gut microbial communities. This article might also help the readers to find treatments targeting GM for the prevention of various diseases linked to it effectively.

随着时间的推移,人们越来越认识到生命早期肠道微生物群(GM)对人类健康和疾病的贡献。微生物群的组成受种族、地理、生活方式和个体差异等因素的影响,会发生变化。微生物群具有双重作用,既能抵御病原体,又能塑造宿主免疫系统。微生物组成紊乱会导致免疫失调,影响防御机制。此外,转基因还能帮助消化,释放营养物质,并通过微生物代谢产物影响肝脏、大脑和内分泌系统等生理系统。菌群失调会破坏肠道平衡,导致与年龄有关的疾病。最近的研究正在阐明健康微生物群的细菌种类,从而确定什么是 "健康 "的结肠微生物群。本综述文章重点探讨了微生物群组成对平衡发展的重要性、转基因在衰老过程中的作用以及肠道微生物群落改变导致的老年相关疾病。本文还可能帮助读者找到针对转基因的治疗方法,以有效预防与之相关的各种疾病。
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引用次数: 0
Inhibitory immune checkpoints suppress the surveillance of senescent cells promoting their accumulation with aging and in age-related diseases. 抑制性免疫检查点会抑制对衰老细胞的监控,从而促进衰老细胞的积累,并引发与年龄相关的疾病。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-01 Epub Date: 2024-07-01 DOI: 10.1007/s10522-024-10114-w
Antero Salminen

The accumulation of pro-inflammatory senescent cells within tissues is a common hallmark of the aging process and many age-related diseases. This modification has been called the senescence-associated secretory phenotype (SASP) and observed in cultured cells and in cells isolated from aged tissues. Currently, there is a debate whether the accumulation of senescent cells within tissues should be attributed to increased generation of senescent cells or to a defect in their elimination from aging tissues. Emerging studies have revealed that senescent cells display an increased expression of several inhibitory immune checkpoint ligands, especially those of the programmed cell death protein-1 (PD-1) ligand-1 (PD-L1) proteins. It is known that the PD-L1 ligands, especially those of cancer cells, target the PD-1 receptor of cytotoxic CD8+ T and natural killer (NK) cells disturbing their functions, e.g., evoking a decline in their cytotoxic activity and promoting their exhaustion and even apoptosis. An increase in the level of the PD-L1 protein in senescent cells was able to suppress their immune surveillance and inhibit their elimination by cytotoxic CD8+ T and NK cells. Senescent cells are known to express ligands for several inhibitory immune checkpoint receptors, i.e., PD-1, LILRB4, NKG2A, TIM-3, and SIRPα receptors. Here, I will briefly describe those pathways and examine whether these inhibitory checkpoints could be involved in the immune evasion of senescent cells with aging and age-related diseases. It seems plausible that an enhanced inhibitory checkpoint signaling can prevent the elimination of senescent cells from tissues and thus promote the aging process.

组织中促炎性衰老细胞的积累是衰老过程和许多老年相关疾病的共同特征。这种变化被称为衰老相关分泌表型(SASP),可在培养细胞和从衰老组织中分离的细胞中观察到。目前,衰老细胞在组织内的积累是由于衰老细胞的生成增加,还是由于衰老组织中衰老细胞的清除缺陷,还存在争议。新近的研究发现,衰老细胞显示出几种抑制性免疫检查点配体的表达增加,尤其是那些程序性细胞死亡蛋白-1(PD-1)配体-1(PD-L1)蛋白。众所周知,PD-L1 配体,尤其是癌细胞的配体,会靶向细胞毒性 CD8+ T 细胞和自然杀伤(NK)细胞的 PD-1 受体,干扰它们的功能,例如,导致它们的细胞毒活性下降,促进它们衰竭甚至凋亡。衰老细胞中 PD-L1 蛋白水平的增加能够抑制它们的免疫监视,并抑制细胞毒性 CD8+ T 细胞和 NK 细胞对它们的清除。已知衰老细胞表达几种抑制性免疫检查点受体的配体,即 PD-1、LILRB4、NKG2A、TIM-3 和 SIRPα 受体。在此,我将简要介绍这些途径,并探讨这些抑制性检查点是否可能参与衰老细胞的免疫逃避以及与衰老相关的疾病。抑制性检查点信号的增强会阻止衰老细胞从组织中清除,从而促进衰老过程,这似乎是有道理的。
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引用次数: 0
Compensation effect of mortality is a challenge to substantial lifespan extension of humans. 死亡率的补偿效应是人类大幅延长寿命所面临的挑战。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-01 Epub Date: 2024-05-29 DOI: 10.1007/s10522-024-10111-z
Natalia S Gavrilova, Leonid A Gavrilov

Despite frequent claims regarding radical extensions of human lifespan in the near future, many pragmatic scientists caution against excessive and baseless optimism on this front. In this study, we examine the compensation effect of mortality (CEM) as a potential challenge to substantial lifespan extension. The CEM is an empirical mortality regularity, often depicted as relative mortality convergence at advanced ages. Analysis of mortality data from 44 human populations, available in the Human Mortality Database, demonstrated that CEM can be represented as a continuous decline in relative mortality variation (assessed through the coefficient of variation and the standard deviation of the logarithm of mortality) with age, reaching a minimum corresponding to the species-specific lifespan. Through this method, the species-specific lifespan is determined to be 96-97 years, closely aligning with estimates derived from correlations between Gompertz parameters (95-98 years). Importantly, this representation of CEM can be achieved non-parametrically, eliminating the need for estimating Gompertz parameters. CEM is a challenge to lifespan extension, because it suggests that the true aging rate in humans (based on loss of vital elements, e.g., functional cells) remains stable at approximately 1% per year in the majority of human populations and is not affected by environmental or familial longevity factors. Given this rate of functional cell loss, one might anticipate that the total pool of functional cells could be entirely depleted by the age of 115-120 years creating physiological limit to human lifespan. Mortality pattern of supercentenarians (110 + years) aligns with this prediction.

尽管人类寿命在不久的将来会大幅延长的说法屡见不鲜,但许多务实的科学家还是提醒人们不要在这方面过度和毫无根据地乐观。在本研究中,我们将死亡率的补偿效应(CEM)作为大幅延长寿命的潜在挑战进行研究。死亡率补偿效应是一种经验性的死亡率规律,通常被描述为高龄时相对死亡率的趋同。对人类死亡率数据库(Human Mortality Database)中 44 个人类种群的死亡率数据进行的分析表明,CEM 可表现为相对死亡率变化(通过变异系数和死亡率对数的标准偏差进行评估)随着年龄的增长而持续下降,并达到与物种特定寿命相对应的最小值。通过这种方法,物种的特定寿命被确定为 96-97 岁,这与根据贡珀兹参数之间的相关性得出的估计值(95-98 岁)非常吻合。重要的是,这种 CEM 表示方法可以非参数方式实现,无需估计冈培兹参数。CEM 是对寿命延长的一个挑战,因为它表明,在大多数人类群体中,人类的真实衰老率(基于生命要素(如功能细胞)的损失)稳定在每年约 1%,并且不受环境或家族长寿因素的影响。鉴于这种功能细胞丧失的速度,我们可以预计,到 115-120 岁时,功能细胞的总量可能会全部耗尽,从而造成人类寿命的生理极限。超百岁老人(110 岁以上)的死亡模式与这一预测相吻合。
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引用次数: 0
Intracellular cytokines in peritoneal leukocytes relate to lifespan in aging and long-lived female mice. 腹膜白细胞内细胞因子与衰老和长寿雌性小鼠的寿命有关。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-01 Epub Date: 2024-05-15 DOI: 10.1007/s10522-024-10110-0
Irene Martínez de Toda, Judith Félix, Estefanía Díaz-Del Cerro, Mónica De la Fuente

Peritoneal immune cell function is a reliable indicator of aging and longevity in mice and inflammaging is associated with a shorter lifespan. Nevertheless, it is unknown if the content of cytokines in these immune cells is linked to individual differences in lifespan. Therefore, this work aimed to investigate different peritoneal leukocyte populations and their content in intracellular pro-inflammatory (TNF and IL-6) and anti-inflammatory (IL-10) cytokines by flow cytometry in adult (10 months-old, n = 8) and old (18 months-old, n = 20) female Swiss/ICR mice. In addition, old mice were monitored longitudinally throughout their aging process, and the same markers were analyzed at the very old (24 months-old, n = 8) and long-lived (30 months-old, n = 4) ages. The longitudinal follow-up allowed us to relate the investigated parameters to individual lifespans. The results show that long-lived female mice exhibit an adult-like profile in most parameters investigated but also display specific immune adaptations, such as increased CD4+ and CD8+ T cells containing the pro-inflammatory TNF cytokine and CD4+ T cells and macrophages containing the anti-inflammatory cytokine IL-10. These adaptations may underlie their exceptional longevity. In addition, a negative correlation was obtained between the percentage of cytotoxic T cells, KLRG-1/CD4, large peritoneal macrophages, and the percentage of CD4+ T cells containing IL-6 and macrophages containing IL-10 in old age and lifespan, whereas a positive correlation was found between the CD4/CD8 ratio and the longevity of the animals at the same age. These results highlight the crucial role of peritoneal leukocytes in inflammaging and longevity.

腹膜免疫细胞功能是小鼠衰老和长寿的可靠指标,炎症与寿命缩短有关。然而,这些免疫细胞中细胞因子的含量是否与寿命的个体差异有关还不得而知。因此,这项工作旨在通过流式细胞术研究成年(10 个月大,n = 8)和老年(18 个月大,n = 20)雌性瑞士/ICR 小鼠腹膜白细胞群的不同及其细胞内促炎症(TNF 和 IL-6)和抗炎症(IL-10)细胞因子的含量。此外,我们还对老龄小鼠的整个衰老过程进行了纵向监测,并在非常老龄(24 个月大,n = 8)和长寿(30 个月大,n = 4)时对相同的标记物进行了分析。通过纵向跟踪,我们可以将所调查的参数与个体寿命联系起来。结果表明,长寿雌性小鼠在大多数调查参数中表现出与成人相似的特征,但也显示出特殊的免疫适应性,如含有促炎症TNF细胞因子的CD4+和CD8+T细胞增多,以及含有抗炎症细胞因子IL-10的CD4+T细胞和巨噬细胞增多。这些适应性可能是它们特别长寿的原因。此外,细胞毒性 T 细胞、KLRG-1/CD4、大型腹腔巨噬细胞的百分比以及含有 IL-6 的 CD4+ T 细胞和含有 IL-10 的巨噬细胞的百分比在老年期与寿命之间呈负相关,而 CD4/CD8 比率与同龄动物的寿命呈正相关。这些结果凸显了腹膜白细胞在炎症和长寿中的关键作用。
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引用次数: 0
The influence of sex-specific factors on biological transformations and health outcomes in aging processes. 老龄化过程中性别特异性因素对生物转化和健康结果的影响。
IF 4.4 4区 医学 Q1 GERIATRICS & GERONTOLOGY Pub Date : 2024-10-01 Epub Date: 2024-07-13 DOI: 10.1007/s10522-024-10121-x
Yongyin Huang, Hongyu Li, Runyu Liang, Jia Chen, Qiang Tang

The aging process demonstrates notable differences between males and females, which are key factors in disease susceptibility and lifespan. The differences in sex chromosomes are fundamental to the presence of sex bias in organisms. Moreover, sex-specific epigenetic modifications and changes in sex hormone levels impact the development of immunity differently during embryonic development and beyond. Mitochondria, telomeres, homeodynamic space, and intestinal flora are intricately connected to sex differences in aging. These elements can have diverse effects on men and women, resulting in unique biological transformations and health outcomes as they grow older. This review explores how sex interacts with these elements and shapes the aging process.

男性和女性在衰老过程中存在明显差异,这是影响疾病易感性和寿命的关键因素。性染色体的差异是生物体内存在性别偏见的根本原因。此外,性别特异性表观遗传修饰和性激素水平的变化对胚胎发育期及以后的免疫力发展产生了不同的影响。线粒体、端粒、家动力空间和肠道菌群与衰老的性别差异有着错综复杂的联系。这些因素会对男性和女性产生不同的影响,从而导致他们在变老过程中产生独特的生物转化和健康结果。这篇综述探讨了性别如何与这些元素相互作用并塑造衰老过程。
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引用次数: 0
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Biogerontology
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