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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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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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Aging01:26

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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
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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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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
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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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Frailty Assessment in an Aging Mouse Model
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Age-Related Frailty: A Clinical Model for Geroscience?

C Takeda1, D Angioni, E Setphan

  • 1Dr Catherine Takeda, MD, Gérontopôle, CHU Toulouse, Cité de la Santé, Hôpital La Grave, Place Lange, 31059 Toulouse cedex 9, France, Tel : +33.(0)5.17.77.70.28, Fax +33.(0)5.61.77.70.71,

The Journal of Nutrition, Health & Aging
|November 27, 2020
PubMed
Summary

Distinguishing between aging and disease as causes of frailty in older adults is crucial. Understanding these differences may lead to tailored treatments in geriatric care.

Keywords:
Frailty causesage-related frailtyagingfrailty related to diseasesgeroscience

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Area of Science:

  • Gerontology
  • Geriatric Medicine
  • Clinical Frailty

Background:

  • Older adults often exhibit frailty, which is associated with both advanced age and the presence of multiple medical conditions (multimorbidity).
  • The interplay between aging and comorbidity in the development of frailty is complex and often synergistic.
  • Current clinical practice frequently encounters patients where differentiating the primary driver of frailty—aging versus disease—is challenging.

Purpose of the Study:

  • To explore the distinction between age-related frailty and frailty stemming from comorbidity.
  • To highlight the importance of differentiating these frailty origins for future geriatric care.
  • To set the stage for distinct pathophysiological, diagnostic, prognostic, and therapeutic approaches.

Main Methods:

  • Conceptual analysis of the relationship between aging, multimorbidity, and frailty.
  • Review of clinical observations in geriatric practice.
  • Consideration of emerging geroscience principles.

Main Results:

  • Frailty is multifactorial, with both aging and comorbidity contributing significantly.
  • Synergistic effects between aging and comorbidity are common in the development of frailty.
  • A clear distinction between age-related and comorbidity-related frailty is often difficult to ascertain.

Conclusions:

  • Differentiating the primary cause of frailty (aging vs. comorbidity) is clinically important.
  • Future advancements in geroscience necessitate distinct approaches for age-related frailty and comorbidity-related frailty.
  • Tailored strategies for physiopathology, diagnosis, prognosis, and treatment are anticipated for distinct frailty etiologies.