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Updated: Jul 8, 2026

Pneumococcus Infection of Primary Human Endothelial Cells in Constant Flow

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Published on: October 31, 2019

SERCA pumps and human diseases.

¹INSERM, U 563, Toulouse, F-31300 France. alain.hovnanian@toulouse.inserm.fr

Sub-Cellular Biochemistry

|January 16, 2008

Summary

Sarco(endo)plasmic reticulum Ca2+ ATPases (SERCA) are vital Ca2+ pumps. Gene targeting revealed unexpected roles in respiratory failure, skin cancer, and diabetes, advancing understanding of Ca2+ regulation and disease.

Area of Science:

Biochemistry
Molecular Biology
Physiology

Background:

Sarco(endo)plasmic reticulum Ca2+ ATPases (SERCA) are crucial for calcium transport, maintaining cellular calcium homeostasis.
Alternative splicing of ATP2A genes generates diverse SERCA isoforms with distinct regulatory and kinetic properties, optimizing function across various tissues.
SERCA pumps are central to calcium signaling, influencing cytosolic and nuclear calcium variations that govern cellular responses.

Purpose of the Study:

To investigate the physiological roles and disease relevance of different SERCA isoforms.
To explore the consequences of SERCA gene mutations and targeted gene disruption in various tissues.
To elucidate the complex relationship between SERCA function, calcium signaling, and human diseases.

Main Methods:

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Analysis of human genetic diseases linked to SERCA gene defects (ATP2A1, ATP2A2).
Generation and characterization of genetically modified mouse models (SERCA1, SERCA2, SERCA3 null mutants).
Phenotypic analysis of mutant mice, including physiological and pathological assessments.

Main Results:

SERCA1 deficiency leads to respiratory failure in mice, contrasting with Brody myopathy in humans.
SERCA2 heterozygous mutants exhibit age-dependent skin cancer, and reduced expression is linked to heart failure.
SERCA3 null mice do not display diabetes, challenging previous assumptions about its role.

Conclusions:

SERCA isoforms exhibit species- and tissue-specific functions, with gene targeting revealing unexpected phenotypes.
Understanding SERCA roles is critical for deciphering calcium-regulated processes in muscle, heart, and skin.
These findings offer insights into disease pathogenesis and potential therapeutic targets for SERCA-related disorders.