Which of the following is correctly matched (Anti-aging compound — Molecular pathway)? - INI-CET EXAM -2026

INI-CET EXAM -2026

Pharmacology

Medium

Appeared in: INI-CET EXAM -2026

Explanation

Metformin is a biguanide drug whose primary anti-aging and metabolic effects are mediated through the activation of the AMP-activated protein kinase (AMPK) pathway.
AMPK acts as a master energy sensor in cells. Its activation by metformin mimics the cellular state of low energy, such as during caloric restriction or exercise.
This activation leads to beneficial downstream effects like improved glucose uptake, reduced inflammation, and inhibition of the mTOR pathway, contributing to cellular health and longevity.

Option A: Resveratrol is a polyphenol compound that primarily activates Sirtuins, particularly SIRT-1. It does not directly inhibit the mTOR pathway.
Option B: While this is a factually correct association (caloric restriction does activate SIRT-1), it is considered a distractor because caloric restriction is a broad intervention that also significantly impacts other key aging pathways like mTOR and AMPK. Metformin's link to AMPK is more specific and is considered its primary mechanism of action.
Option D: Rapamycin is a specific inhibitor of the mTOR (mechanistic Target of Rapamycin) pathway. The IGF-1/Insulin pathway is an upstream regulator of mTOR, but Rapamycin's direct molecular target is mTOR itself, making this match imprecise.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Molecular pathways of anti-aging compounds as background academic context rather than a clinical decision trigger.
Understanding these pathways is crucial for nurses, as drugs like Metformin are commonly administered for type 2 diabetes, and its anti-aging potential is a topic of current research (e.g., the TAME trial).
Nurses can educate patients on the benefits of lifestyle interventions like caloric restriction and exercise, which activate similar longevity pathways (AMPK, Sirtuins).
Patient safety: A nurse's knowledge of these pathways helps in understanding potential drug-supplement interactions and providing accurate patient education.

How to Approach the Question

First, identify the core task of the question, which is to find the correctly matched pair of an anti-aging compound and its primary molecular pathway.
Second, systematically evaluate each option based on your knowledge of pharmacology and cellular biology.
For Metformin, recall that its principal mechanism of action is the activation of the AMPK pathway.
For Rapamycin, use its name as a mnemonic: it is the mechanistic Target of Rapamycin (mTOR) inhibitor.
For Resveratrol and Caloric Restriction, remember their well-established role in activating Sirtuins (SIRT-1).
Recognize that both option B and option C present factually correct information. In such scenarios, choose the answer that represents the most specific, direct, and primary mechanism. Metformin's action is more narrowly defined by AMPK activation than the broad effects of caloric restriction are by Sirtuin activation alone.

Concept Tested & Keywords

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E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 78-80

E6 Medicine Harrison 22e Part 2 pp. 1779-1781, 1775-1777