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Related Concept Videos

Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

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...
Aging01:26

Aging

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 Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

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...
Development of Human Microbiota01:30

Development of Human Microbiota

The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

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 not...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion

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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Related Experiment Videos

Guangxi Eco-Environmental Health and Aging Study (GEHAS).

Xu Tang1,2, Jiansheng Cai1, Shuzhen Liu2

  • 1Guilin Medical University, Guilin, China.

BMJ Open
|July 7, 2026
PubMed
Summary
This summary is machine-generated.

The Guangxi Eco-Environmental Health and Aging Study (GEHAS) reveals that improved air quality and specific dietary habits can promote healthy aging. DNA methylation shows promise as a biomarker for environmental impacts on aging processes.

Keywords:
AgedEPIDEMIOLOGYEpidemics

Related Experiment Videos

Area of Science:

  • Environmental Health
  • Gerontology
  • Genomics
  • Epigenomics
  • Metabolomics
  • Exposomics

Background:

  • The Guangxi Eco-Environmental Health and Aging Study (GEHAS) investigates healthy aging in a multi-ethnic subtropical population.
  • Addresses knowledge gaps on how eco-environmental and lifestyle factors influence aging trajectories.

Purpose of the Study:

  • To examine the interplay between the eco-environmental exposome, multi-omics profiles, and healthy aging.
  • To understand the influence of environmental and lifestyle factors on aging.

Main Methods:

  • Prospective cohort study with 5645 participants (Yao and Han ethnicities).
  • Baseline data collection (2018-2022) included questionnaires, physical exams, and biological specimens.
  • Multi-omics profiling (genomics, epigenomics, proteomics, metabolomics, exposomics) in sub-cohorts.
  • Follow-up includes surveys every 5 years and passive surveillance via health registries.

Main Results:

  • Improved air quality is linked to mitigated frailty progression.
  • DNA methylation serves as a biomarker for environmental policy interventions and aging.
  • Traditional dietary practices, like oil tea consumption, show protective effects against age-related diseases (dyslipidemia, type 2 diabetes).
  • Diets rich in vegetables, mushrooms, and antioxidants are associated with enhanced cognitive performance and attenuated biological aging.

Conclusions:

  • Eco-environmental factors and lifestyle choices significantly impact healthy aging trajectories.
  • Multi-omics approaches combined with environmental data provide insights into aging mechanisms.
  • GEHAS findings highlight potential interventions for promoting healthy aging in diverse populations.