Automated Patch Clamp Recordings of GPCR-Gated Ion Channels: Targeting the MC4-R/Kir7.1 Potassium Channel Complex

Ciria C Hernandez ^1,2, Luis E Gimenez ³, Roger D Cone ^3,4

⁰Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA. ciria@umich.edu.

Methods in Molecular Biology +

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June 10, 2024

View abstract on PubMed

Summary

Automated patch clamp recording enhances the study of the melanocortin 4 receptor (MC4-R) and its interaction with Kir7.1 channels. This method aids drug discovery for obesity by screening compounds targeting this vital receptor-channel complex.

Area Of Science

Neuroscience
Pharmacology
Biophysics

Background

The melanocortin 4 receptor (MC4-R), a G protein-coupled receptor (GPCR), is vital for regulating appetite, energy balance, and body weight.
MC4-R signaling is complex, involving interactions within appetite-regulating neural circuits.
MC4-Rs modulate ion channels, such as the inward rectifier potassium channel Kir7.1, influencing cellular excitability and neurotransmission.

Purpose Of The Study

To investigate the MC4-R/Kir7.1 functional complex using automated patch clamp recording.
To explore the potential of high-throughput screening for identifying novel therapeutic strategies targeting MC4-R.
To advance drug discovery for obesity by improving upon existing therapies like Imcivree, which target MC4-R but have limitations.

Main Methods

Utilizing automated patch clamp recording for high-throughput screening of compounds and conditions.
Measuring precise ion channel currents modulated by the MC4-R/Kir7.1 complex.
Analyzing functional and pharmacological properties of the receptor-channel complex and its ligands.

Main Results

Demonstrated the utility of automated patch clamp recording for studying GPCR-gated ion channel complexes.
Provided insights into the functional modulation of Kir7.1 channels by MC4-R signaling.
Highlighted the potential for rapid screening of compounds to identify novel modulators of the MC4-R/Kir7.1 system.

Conclusions

Automated patch clamp recording is a powerful tool for studying MC4-R/Kir7.1 interactions and accelerating drug discovery for obesity.
This approach can be generalized to other GPCR-gated ion channel complexes, offering broad applications in pharmacological research.
Further research into these complexes promises to uncover novel therapeutic strategies and deepen our understanding of receptor-ion channel signaling.

Keywords:

APC Automated patch clamp Drug discovery GPCR-gated ion channels HTS High-throughput screening Kir7.1 MC4-R

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