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関連する概念動画

Aging01:26

Aging

889
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
889
Replicative Cell Senescence02:15

Replicative Cell Senescence

4.5K
Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
4.5K
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

3.9K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
3.9K
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

4.7K
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
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Exercise and Muscle Performance01:27

Exercise and Muscle Performance

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Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
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Mitochondria01:37

Mitochondria

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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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関連する実験動画

Updated: Feb 24, 2026

A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence
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循環型老化タンパク質は運動適応と健康転帰を結びつける

Nicholas Houstis, Qiulian Zhou, Yuling Chen

    medRxiv : the preprint server for health sciences
    |February 23, 2026
    PubMed
    まとめ

    個々の運動能力の向上は、分子要因によって異なります。研究者らは、インスリン様成長因子結合タンパク質-7(IGFBP7)が運動によるフィットネス向上を制限し、健康寿命に影響を与えることを発見しました。

    キーワード:
    運動生理学老化健康寿命IGFBP7フィットネス個別化医療

    さらに関連する動画

    Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
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    科学分野:

    • 運動生理学
    • 分子生物学
    • 老化研究

    背景:

    • 生理学的ストレスへの適応と健康は、個人間で大きく異なります。
    • 同一の運動トレーニングから得られる人間のフィットネス向上の異質性はよく文書化されていますが、分子レベルではほとんど理解されていません。
    • 運動「トレーニング感受性」の分子決定因子を特定することは、健康寿命の理解にとって重要です。

    研究 の 目的:

    • 運動適応を制限する循環分子要因を特定すること。
    • 運動に応答した生理学的可塑性の調節におけるインスリン様成長因子結合タンパク質-7(IGFBP7)の役割を調査すること。
    • IGFBP7レベル、運動応答性、および健康転帰との関連を調査すること。

    主な方法:

    • ランダム化比較高強度間欠トレーニング試験を受けた高齢者を対象とした血漿プロテオミクス解析。
    • 運動耐容能を評価するためのマウスにおけるIGFBP7の遺伝子操作(ノックアウトおよび過剰発現)。
    • UKバイオバンクのデータを用いたIGFBP7レベルと死亡率および加齢関連疾患との関連を調査する関連研究。

    主要な成果:

    • 高強度間欠トレーニングを1年間行った後のフィットネス向上と血漿IGFBP7レベルの上昇は逆相関していました。
    • マウスにおけるIGFBP7の遺伝子欠損は、運動トレーニングによる運動耐容能の改善を著しく増強しました。
    • マウスにおけるIGFBP7の体細胞過剰発現は、運動トレーニングの利点を完全に消失させました。
    • UKバイオバンクコホートにおけるIGFBP7レベルの低下は、死亡率の低下および加齢関連疾患の発生率の低下と関連していました。

    結論:

    • 循環IGFBP7は、運動への生理学的適応に対する分子ブレーキとして機能します。
    • IGFBP7は、運動トレーニング応答性、老化生物学、および全体的な健康寿命を結びつけます。
    • IGFBP7を標的とすることは、運動の利点を高め、健康転帰を改善する可能性があります。