What does this research mean for the field?

The lack of the Kir2.1-encoded inwardly rectifying K(+) current (I(K1)) is the primary mechanistic cause of immature, proarrhythmic properties in human pluripotent stem cell-derived cardiomyocytes, and restoring this current matures their electrophysiological phenotype to an adult-like state. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.ESTABLISHES_NEW_DIRECTION.

What question did this study set out to answer?

The study aims to evaluate the functional properties of cardiomyocytes derived from pluripotent stem cells and identify factors contributing to their immature phenotype.

February 1, 2013Circulation Arrhythmia and ElectrophysiologyOpen Access

Mechanism-Based Facilitated Maturation of Human Pluripotent Stem Cell–Derived Cardiomyocytes

Q: What is the clinical evidence from this study?

Population: Immature electrophysiological properties in human pluripotent stem cell-derived cardiomyocytes. Intervention: Forced expression of Kir2.1 vs. Conventional culturing method / immature hESC-CMs. Primary outcome: Electrophysiological phenotype and proarrhythmic action potential traits.

View Full Paper

Ask AI

Bookmark

Key result

Forced expression of Kir2.1 in human embryonic stem cell-derived cardiomyocytes completely ablated proarrhythmic action potential traits, rendering the phenotype indistinguishable from adult cells.

Population

Cardiomyocytes derived from multiple pluripotent human stem cell lines and induced pluripotent stem cells

Comparison

Forced expression of Kir2.1 and a bio-mimetic… vs Conventional culturing method / immature…

Design

Preclinical

Authors

DLDeborah K. LieuUniversity of California, Davis JFJi‐Dong FuThe Ohio State University Wexner Medical Center NCNipavan ChiamvimonvatElectrophysiology

Discussion

Member takes

Implication

Validates functional maturity of hESC-derived cardiomyocytes; extends prior differentiation protocols across multiple lines and cell types.

Key Points

The study aims to evaluate the functional properties of cardiomyocytes derived from pluripotent stem cells and identify factors contributing to their immature phenotype.
Used human embryonic (H1, HES2) and induced pluripotent stem cell lines to derive cardiomyocytes through various differentiation protocols.
Investigated multiple ionic currents related to action potential properties in cardiomyocytes.
Identified the lack of inward rectifying K+ current (IK1) as key to immature electrophysiological properties in hESC-derived cardiomyocytes.
Forced expression of Kir2.1 resulted in robust IK1 expression and transformation of action potential traits to resemble adult cardiomyocytes.
Developed a bio-mimetic culturing strategy that enhances cardiomyocyte maturation without genetic or pharmacological interventions.

Structured PICO

Population

Cardiomyocytes derived from multiple pluripotent human stem cell lines (hESC: H1, HES2) and induced pluripotent stem cells

Intervention

Forced expression of Kir2.1 and a bio-mimetic culturing strategy

Comparator

Conventional culturing method / immature hESC-CMs without forced expression

Outcome

Electrophysiological properties and action potential traitssurrogate

Forced expression of Kir2.1 or bio-mimetic culturing can mature human pluripotent stem cell-derived cardiomyocytes, eliminating proarrhythmic traits and improving their utility for clinical and research applications.

Cite This Study

Lieu et al. (2013) studied Immature electrophysiological properties in human pluripotent stem cell-derived cardiomyocytes. Forced expression of Kir2.1 vs. Conventional culturing method / immature hESC-CMs was evaluated on Electrophysiological phenotype and proarrhythmic action potential traits. Forced expression of Kir2.1 in human embryonic stem cell-derived cardiomyocytes completely ablated proarrhythmic action potential traits, rendering the phenotype indistinguishable from adult cells.

synapsesocial.com/papers/6a64e404e8f8d1bd661b6da3 https://doi.org/10.1161/circep.111.973420

View Full Paper

Ask AI

Bookmark

Implication

Validates functional maturity of hESC-derived cardiomyocytes; extends prior differentiation protocols across multiple lines and cell types.

Mechanism-Based Facilitated Maturation of Human Pluripotent Stem Cell–Derived Cardiomyocytes

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Mechanism-Based Facilitated Maturation of Human Pluripotent Stem Cell–Derived Cardiomyocytes

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider