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Related Concept Videos

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

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

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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...
318
Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

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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...
309
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion

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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...
308
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

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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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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Related Experiment Video

Updated: Mar 17, 2026

Atomic Absorbance Spectroscopy to Measure Intracellular Zinc Pools in Mammalian Cells
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Atomic Absorbance Spectroscopy to Measure Intracellular Zinc Pools in Mammalian Cells

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Main biomarkers associated with age-related plasma zinc decrease and copper/zinc ratio in healthy elderly from

R Giacconi1, L Costarelli2, F Piacenza2

  • 1Translational Research Ctr. of Nutrition and Ageing, Scientific and Technological Pole, Italian National Institute of Health and Science on Aging (INRCA), Ancona, Italy. r.giacconi@inrca.it.

European Journal of Nutrition
|July 28, 2016
PubMed
Summary

Plasma zinc levels decline with age due to physiological changes, not just diet. Understanding these factors improves assessment of zinc status in older adults.

Keywords:
AgingInflammationPolymorphismsZinc homeostasisZinc plasma levels

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Area of Science:

  • Gerontology
  • Nutritional Immunology
  • Trace Element Metabolism

Background:

  • Zinc (Zn) is crucial for immune function; impaired Zn status exacerbates inflammation in aging.
  • Circulating Zn alone may not accurately reflect an individual's Zn status.
  • Identifying determinants of plasma Zn is vital for understanding aging-related changes.

Purpose of the Study:

  • To identify key determinants of plasma Zn concentration in the elderly.
  • To improve the accuracy of Zn status assessment in aging populations.
  • To understand the influence of physiopathological changes on Zn levels.

Main Methods:

  • Investigated associations between Zn levels and biomarkers in 1090 healthy European elderly.
  • Utilized stepwise multivariate linear regression models.
  • Analyzed factors including age, diet, inflammation, lab parameters, and genetic polymorphisms.

Main Results:

  • Plasma Zn decrement was strongly predicted by age.
  • Positive correlations found with albumin, RANTES, and Zn intake.
  • HSP70 +1267 AA genotype and Cu/Zn ratio were independent factors associated with plasma Zn and inflammation markers.

Conclusions:

  • Identified key independent determinants of plasma Zn and Cu/Zn ratio variability in the elderly.
  • Suggests age-related decline in circulating Zn is linked more to physiopathological changes than nutritional intake.
  • Highlights the complexity of Zn homeostasis during aging.