Potential Links Between Aging, Mitochondrial Dysfunction, and Drug Transporter Function-Molecular Mechanisms and...

Area of Science:

• Geriatric Pharmacology
• Mitochondrial Biology
• Drug Transport

Background:

• Aging causes mitochondrial dysfunction, impacting cellular processes in the gut.
• This dysfunction may alter the activity of key gastrointestinal drug transporters (ABC and SLC families).
• These transporters are vital for oral drug absorption and overall bioavailability.

Purpose of the Study:

• To review the molecular connections between age-related mitochondrial decline and gastrointestinal drug transporter regulation.
• To explore the pharmacokinetic consequences of these changes in older individuals.
• To discuss implications for drug therapy in the elderly.

Main Methods:

• Literature review focusing on aging, mitochondrial function, and drug transporters.
• Analysis of molecular pathways linking mitochondrial signals (energy, oxidative stress) to transporter regulation.
• Examination of clinical data on age-related drug bioavailability changes.

Main Results:

• Mitochondrial dysfunction is a key feature of the aging intestine.
• Mitochondrial signals regulate transporter expression and activity through pathways like AMPK, Sirtuin-FOXO, Nrf2, and NF-κB.
• Clinical examples demonstrate age-related bioavailability shifts potentially due to transporter alterations.

Conclusions:

• Age-related mitochondrial dysfunction significantly impacts gastrointestinal drug transporter function.
• This interaction affects drug pharmacokinetics and bioavailability in older adults.
• Strategies for geriatric pharmacotherapy include dose adjustments and preserving mitochondrial health.