P11 Loss-of-Function is Associated with Decreased Cell Proliferation and Neurobehavioral Disorders in Mice

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Depression is often comorbid with anxiety and memory deficits in humans.
• The underlying molecular mechanisms for these complex conditions are not fully understood.
• P11 protein's function in these neurological disorders requires further investigation.

Purpose of the Study:

• To investigate the role of P11 in depression-like behaviors and associated cognitive deficits.
• To explore the molecular functions of P11 in cell proliferation and size regulation.
• To establish a genetic model for studying the interplay between P11, depression, anxiety, and memory.

Main Methods:

• Generation of P11 knockout mice and MEF cell lines using CRISPR/Cas9 technology.
• Assessment of depression-like and anxiety-like behaviors in P11 knockout mice.
• Evaluation of cell proliferation, cell size, and F-actin stress fiber accumulation in P11 knockout MEFs.
• Analysis of hippocampal cell proliferation in P11 knockout mice.
• Behavioral testing to assess memory deficits, differentiating between male and female mice.

Main Results:

• P11 knockout led to decreased cell proliferation and increased cell size in MEFs, potentially due to F-actin accumulation.
• P11 knockout mice exhibited a depression-like phenotype and anxiety-like disorder.
• A decrease in proliferating cells was observed in the hippocampus of P11 knockout mice.
• Memory deficits were observed in female, but not male, P11 knockout mice.

Conclusions:

• P11 plays a significant role in regulating cellular processes, including proliferation and cell size.
• The study establishes a link between P11 deficiency and a complex phenotype encompassing depression, anxiety, and memory impairment.
• Targeting P11 presents a potential therapeutic strategy for managing comorbid depression, anxiety, and memory disorders.