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The Effect of Aging on Tissues01:19

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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...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

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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...
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Pharmacodynamics in Geriatric Patients: Effects of Age01:27

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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...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

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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...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

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Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion01:18

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In geriatric patients, renal physiology undergoes significant changes, including diminished renal blood flow and a lower glomerular filtration rate (GFR), leading to alterations in medication clearance. Drugs such as aminoglycoside antibiotics, lithium, and digoxin, which rely on glomerular filtration for removal from the body, particularly impact pharmacokinetics. These drugs tend to have slower clearance rates in older adults, necessitating careful dosage considerations.Evaluation of renal...
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Fundus Photography as a Convenient Tool to Study Microvascular Responses to Cardiovascular Disease Risk Factors in Epidemiological Studies
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Ageing and microvasculature.

Maria Giovanna Scioli1, Alessandra Bielli1, Gaetano Arcuri1

  • 1Department of Biomedicine and Prevention, Institute of Anatomic Pathology, Tor Vergata University, Via Montpellier, Rome 00133, Italy.

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|September 23, 2014
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Summary
This summary is machine-generated.

Aging impairs microvascular function, leading to endothelial dysfunction and reduced blood vessel dilation. Lifestyle changes and antioxidant therapies show promise in improving vascular health in older adults.

Keywords:
Endothelial cellsEndothelial dysfunctionNitric oxideOrgan-specific ageingSmooth muscle cellsVascular remodelling

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Area of Science:

  • Cardiovascular Science
  • Gerontology
  • Vascular Biology

Background:

  • Aging is associated with a decline in microvascular function.
  • Endothelial dysfunction, characterized by reduced angiogenesis, increased adhesion molecules, and impaired vasodilation, is a key feature of aging vasculature.
  • Microvascular cells undergo phenotypic and morphological changes with age, contributing to organ-specific alterations like fibrosis.

Purpose of the Study:

  • To review the age-related changes in microvascular function.
  • To discuss the molecular mechanisms underlying endothelial dysfunction in aging.
  • To explore therapeutic strategies for mitigating age-related microvascular decline.

Main Methods:

  • Literature review of studies on aging and microvascular function.
  • Analysis of experimental data on endothelial cells, smooth muscle cells, and pericytes.
  • Examination of the role of nitric oxide (NO) bioavailability in age-related vascular changes.

Main Results:

  • Aging impairs endothelial properties, leading to reduced angiogenic capacity and altered vasodilation.
  • Decreased nitric oxide (NO) bioavailability, due to impaired endothelial nitric oxide synthase (eNOS) activity and NO inactivation, contributes significantly to endothelial dysfunction.
  • Therapeutic strategies including lifestyle modification, antioxidants, and anti-inflammatory treatments demonstrate potential benefits.

Conclusions:

  • Age-related microvascular dysfunction is a complex process involving endothelial dysfunction and cellular changes.
  • Restoring NO bioavailability and reducing inflammation are key targets for therapeutic interventions.
  • Further research into the biomolecular basis of these changes is crucial for developing effective strategies to improve healthspan in the elderly.