AMPK and Polycystic Kidney Disease Drug Development: An Interesting Off-Target Target

Michael J Caplan1

  • 1Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT, United States.

Frontiers in Medicine
|February 17, 2022
PubMed

Insights

Autosomal Dominant Polycystic Kidney Disease (ADPKD) disrupts kidney structure and cellular signaling. Targeting cellular energy pathways, specifically adenosine monophosphate-stimulated protein kinase, may offer new therapeutic strategies for ADPKD.

Area of Science:

  • Nephrology
  • Genetics
  • Cellular Biology

Background:

  • Autosomal Dominant Polycystic Kidney Disease (ADPKD) is a genetic disorder characterized by significant alterations in kidney structure and cellular signaling pathways.
  • The precise mechanisms linking ADPKD-causing gene mutations to these signaling disruptions are not fully understood.
  • Altered cellular metabolism is a hallmark of ADPKD.

Purpose of the Study:

  • To investigate the role of cellular metabolism in ADPKD.
  • To explore the involvement of adenosine monophosphate-stimulated protein kinase (AMPK) in ADPKD.
  • To evaluate AMPK modulation as a potential therapeutic strategy for ADPKD.

Main Methods:

  • Analysis of cellular metabolism in ADPKD models.
  • Assessment of AMPK activity in affected cells.
  • Investigation of therapeutic potential of AMPK modulators.

Main Results:

  • Cellular metabolism is significantly altered in ADPKD.
  • AMPK, a key regulator of cellular energy, shows perturbed activity in ADPKD cells.
  • Modulating AMPK activity shows promise in preclinical studies.

Conclusions:

  • AMPK plays a critical role in cellular energy regulation within the context of ADPKD.
  • Targeting AMPK presents a promising avenue for developing novel ADPKD therapeutics.
  • Further research into AMPK modulation could lead to effective treatments for ADPKD.

Related Concept Videos

Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion01:20

Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion

Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
5
Effect of Hepatic Disease on Pharmacokinetics: Active Drug, Metabolite and Fraction of Metabolized Drug01:14

Effect of Hepatic Disease on Pharmacokinetics: Active Drug, Metabolite and Fraction of Metabolized Drug

In pharmacotherapy, monitoring drug concentrations is paramount, especially for drugs whose therapeutic effects hinge on both the active compound and its metabolite. Hepatic impairment profoundly influences drug potency by altering liver function. If the drug is more potent than its metabolite, impaired liver function amplifies drug activity due to elevated drug concentration levels. Conversely, if the metabolite holds greater potency, diminished liver function diminishes drug activity by...
5
cAMP-dependent Protein Kinase Pathways01:25

cAMP-dependent Protein Kinase Pathways

Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
6.8K
Targets for Drug Action: Overview01:26

Targets for Drug Action: Overview

Drugs target macromolecules to modify ongoing cellular processes. Primary drug targets include receptors, ion channels, transporters, and enzymes.
Receptors are either membrane-spanning or intracellular proteins, which upon binding a ligand, get activated and transmit the signal downstream to elicit a response. Drugs bind receptors, either mimicking the action of endogenous ligands or blocking the receptor activity to bring about a modified response. Nearly 35% of approved drugs target the G...
7.8K
PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
4.1K
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess...
10