老化に関する研究から健康的な老化のための治療法まで
Judith Campisi1, Pankaj Kapahi1, Gordon J Lithgow1
1Buck Institute for Research on Aging, Novato, CA, USA.
Nature
|July 12, 2019
まとめ
科学者たちは モデル生物の寿命を延ばす 遺伝子変異を特定し 生物学的老化を進めている この研究は,人間の健康に重大な医学的,社会的影響を及ぼす新しい時代に入っています.
科学分野:
- ゲロントロジーと分子生物学
- 遺伝子の老化
- モデル生物の寿命調整
背景:
- 生物学的老化のメカニズムを理解することは 生物学の長年の課題です
- 特定の遺伝子変異の特定は 老化研究分野を大幅に前進させました
- これらの発見は 老化過程の研究に 科学的信頼性をもたらしました
研究 の 目的:
- 過去30年の老化研究における 重要なマイルストーンをまとめます
- 各種の老化経路とその基礎となる生物学的過程について議論する.
- 老化に関する研究の新時代とその広範な意味を強調する.
主な方法:
- 老化研究における歴史的科学文献と画期的な発見のレビュー
- 多細胞モデル生物の寿命に影響を与える遺伝的要因の分析.
- 老化生物学における現在と将来の傾向についての議論
主要な成果:
- モデル生物の寿命を明らかに延長する遺伝子変異の特定
- 老化に関する生物学的研究における 信頼性と重要な進歩を確立した.
- 特定の老化経路とプロセスを認識する
結論:
- 老化に関する研究は 重要な科学的成果によって特徴づけられています
- この分野は 医学,商業,社会に大きな影響を与える 新しい時代へと移行しています
- この転換点は老化に関する研究だけでなく,ヒトの健康に関する研究にも影響を及ぼします.
関連する概念動画
01:26Aging
636
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...
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...
636
01:19The Effect of Aging on Tissues
3.4K
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...
3.4K
01:09Changes in the Appendicular Skeleton with Age
3.4K
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
3.4K
01:27Pharmacodynamics in Geriatric Patients: Effects of Age
192
Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
192
01:22Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption
231
As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
231
01:00Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution
235
Drug distribution in the human body is influenced by several factors, including plasma protein concentration, body composition, blood flow, tissue-protein concentration, and tissue fluid pH. Among these, changes in plasma protein concentration and body composition due to aging significantly affect how drugs are distributed within the body. Specifically, aging is associated with a decrease in albumin levels by about 10% and an increase in α1-acid glycoprotein levels. These alterations are...
235