Drug targeting of dysregulated transcription in Huntington's disease

Aleksey G Kazantsev1, Steven M Hersch

  • 1Harvard Medical School, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Charlestown, MA 02129-4404, USA. akazantsev@partners.org

Insights

Huntington's disease (HD) involves widespread transcriptional dysregulation due to mutant huntingtin protein interactions. Current research reviews therapeutic strategies targeting these complex transcriptional pathways for HD treatment.

Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • Huntington's disease (HD) is characterized by significant transcriptional dysregulation.
  • The underlying cause involves aberrant protein-protein interactions between mutant huntingtin and transcription factors.
  • Identifying key transcriptional regulators in HD remains a challenge due to the widespread changes in RNA transcripts.

Purpose of the Study:

  • To review recent therapeutic advances targeting transcriptional deregulation in Huntington's disease.
  • To discuss potential drug discovery strategies for altered transcriptional pathways in HD.

Main Methods:

  • Review of current scientific literature on Huntington's disease therapeutics.
  • Analysis of challenges and opportunities in targeting transcriptional dysregulation.

Main Results:

  • Transcriptional dysregulation is a hallmark of HD, stemming from mutant huntingtin's interactions.
  • Developing targeted therapeutics is complex due to numerous altered RNA transcripts and non-conventional drug targets.
  • Progress has been made in developing therapies that address transcriptional alterations in HD.

Conclusions:

  • Targeting transcriptional deregulation offers a promising avenue for Huntington's disease therapeutics.
  • Further research into drug discovery strategies is needed to overcome challenges in targeting complex protein-protein interactions and widespread transcriptomic changes.

Related Concept Videos

Huntington Disease l: Introduction01:21

Huntington Disease l: Introduction

Huntington disease or HD is a progressive, fatal neurodegenerative disorder inherited in an autosomal dominant pattern.PathophysiologyIt is caused by expansion of the CAG trinucleotide repeat in the HTT gene on chromosome 4 (4p16.3), producing an abnormal huntingtin protein with an expanded polyglutamine tract. This misfolded protein disrupts cellular function, leading to neuronal death. Normal alleles have ≤26 repeats, 27–35 are intermediate (risk of expansion), 36–39 show reduced penetrance,...
Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: Identification of New Drug Targets

Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
Drugs Affecting Neurotransmitter Synthesis01:29

Drugs Affecting Neurotransmitter Synthesis

Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase, which converts...
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...
Eukaryotic Transcription Inhibitors01:52

Eukaryotic Transcription Inhibitors

Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...