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Related Concept Videos

Pharmacokinetics in Pediatric Patients: Drug Metabolism01:24

Pharmacokinetics in Pediatric Patients: Drug Metabolism

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In pediatric care, understanding the nuances of hepatic drug metabolism is crucial, as it significantly differs from that of adults. This divergence is primarily due to the developmental stage of drug-metabolizing enzymes, which affects how medications are processed in the body. In neonates, for instance, the activity of Phase I enzymes—critical for the initial breakdown of drugs—is markedly reduced, functioning at just 20–40% of the levels seen in adults. This reduction poses...
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Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

278
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...
278
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...
298
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion

283
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...
283
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

267
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...
267
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

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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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Updated: Feb 26, 2026

Author Spotlight: Studying the Impact of Maternal Dietary Deficiencies on Long-Term Offspring Health Outcomes
03:19

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Published on: June 28, 2024

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Maternal age affects offspring nutrient dynamics.

Doriane Muller1, David Giron1, Emmanuel Desouhant2

  • 1Institut de Recherche sur la Biologie de l'Insecte (IRBI), UMR 7261 CNRS/Université François-Rabelais de Tours, Avenue Monge, 37200 Tours, France.

Journal of Insect Physiology
|July 24, 2017
PubMed
Summary
This summary is machine-generated.

Older mothers in parasitic wasps provide fewer nutrients to eggs, impacting offspring development. Despite larval feeding, adult offspring show reduced nutrient levels, affecting their future fitness.

Keywords:
AgeingColorimetryDevelopmentOogenesisParasitoidTransgenerational effects

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Area of Science:

  • Evolutionary biology
  • Insect physiology
  • Reproductive strategies

Background:

  • Maternal physiological state significantly influences offspring fitness.
  • Nutrient provisioning in eggs is a key maternal effect.
  • Parasitic wasps offer a model for studying maternal effects.

Purpose of the Study:

  • To investigate maternal effects on offspring nutrient composition in Eupelmus vuilleti.
  • To determine the impact of maternal age on egg provisioning.
  • To assess the consequences of reduced maternal provisioning on offspring development and nutrient reserves.

Main Methods:

  • Comparative analysis of nutrient content (protein, sugar, lipid, glycogen) in eggs and adult offspring.
  • Controlled feeding experiments with high-quality hosts for larvae.
  • Assessment of adult offspring nutrient levels based on maternal age.

Main Results:

  • Old mothers provisioned eggs with significantly lower protein, sugar, and lipid levels.
  • Larval feeding from a host compensated for initial sugar and lipid shortages.
  • Adult offspring from old mothers exhibited lower protein and glycogen quantities, irrespective of larval feeding.

Conclusions:

  • Maternal age-related nutrient provisioning negatively impacts offspring nutrient composition.
  • Reduced nutrient availability in adult offspring can have long-term consequences for behavior and life history.
  • Maternal effects on egg provisioning are crucial for nutrient availability and fitness in subsequent generations of oviparous animals.