Related Experiment Video
Updated: Jun 22, 2026

Visualizing Protein Kinase A Activity In Head-fixed Behaving Mice Using In Vivo Two-photon Fluorescence Lifetime Imaging Microscopy
Published on: June 7, 2019
Mouse models of altered protein kinase A signaling
Lawrence S Kirschner1, Zhirong Yin, Georgette N Jones
1Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, The Ohio State University, 420 West 12th Avenue, TMRF 544, Columbus, Ohio 43210, USA. lawrence.kirschner@osumc.edu
Abstract:
Protein kinase A (PKA) is an evolutionarily conserved protein which has been studied in model organisms from yeast to man. Although the cAMP-PKA signaling system was the first mammalian second messenger system to be characterized, many aspects of this pathway are still not well understood. Owing to findings over the past decade implicating PKA signaling in endocrine (and other) tumorigenesis, there has been renewed interest in understanding the role of this pathway in physiology, particularly as it pertains to the endocrine system. Because of the availability of genetic tools, mouse modeling has become the pre-eminent system for studying the physiological role of specific genes and gene families as a means to understanding their relationship to human diseases. In this review, we will summarize the current data regarding mouse models that have targeted the PKA signaling system. These data have led to a better understanding of both the complexity and the subtlety of PKA signaling, and point the way for future studies, which may help to modulate this pathway for therapeutic effect.
Insights
Mouse models reveal the complex role of protein kinase A (PKA) signaling in endocrine health and disease. This research clarifies PKA
Area of Science:
- Molecular Biology
- Endocrinology
- Genetics
Background:
- The cyclic adenosine monophosphate-protein kinase A (cAMP-PKA) pathway is a fundamental signaling system with roles in various physiological processes.
- Despite being the first characterized mammalian second messenger system, many aspects of cAMP-PKA signaling remain unclear.
- Recent evidence links PKA signaling to endocrine tumorigenesis, prompting renewed investigation into its physiological functions.
Purpose of the Study:
- To review current knowledge on the physiological roles of the PKA signaling system.
- To summarize findings from mouse models that have genetically manipulated components of the PKA pathway.
- To elucidate the involvement of PKA signaling in endocrine function and disease.
Main Methods:
- Review of existing literature on PKA signaling and mouse models.
- Analysis of data from genetically engineered mouse models targeting the PKA pathway.
- Synthesis of findings to understand PKA's role in physiology and disease.
Main Results:
- Mouse models have illuminated the intricate and nuanced functions of PKA signaling.
- Targeted genetic studies in mice have provided insights into PKA's involvement in endocrine regulation.
- These models demonstrate PKA's complex role in both normal physiology and pathological conditions like cancer.
Conclusions:
- Mouse models are crucial for dissecting the physiological roles of PKA signaling.
- Understanding PKA's complexity is key to exploring its therapeutic potential.
- Future research using these models may lead to strategies for modulating PKA for therapeutic benefit in endocrine diseases.
Related Concept Videos
MAPK Signaling Cascades
Amplifying Signals via Enzymatic Cascade
PI3K/mTOR/AKT Signaling Pathway
Calmodulin-dependent Signaling
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
The JAK-STAT Signaling Pathway
Protein Kinases and Phosphatases
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...

