Early Neurobehavioral Development of Mice Lacking Endogenous PACAP

Area of Science:

• Neuroscience
• Developmental Biology

Background:

• Pituitary adenylate cyclase activating polypeptide (PACAP) is a neuropeptide with critical roles in embryonic development and neuronal health.
• PACAP deficiency is known to impact nervous system development, but early neurobehavioral development in PACAP-deficient models remains underexplored.

Purpose of the Study:

• To investigate the early postnatal neurobehavioral development of mice lacking endogenous PACAP.
• To assess physical development and neurological reflexes in PACAP-deficient mice during the first three weeks of life.

Main Methods:

• Evaluation of developmental milestones and neurological reflexes in PACAP-deficient mice (heterozygous and homozygous) and wild-type controls.
• Utilized a comprehensive battery of tests to assess motor coordination and neurobehavioral development.

Main Results:

• PACAP-deficient mice displayed significantly slower weight gain compared to controls.
• Impaired development of reflexes such as air righting, grasp, and gait initiation was observed in PACAP-deficient mice.
• Motor coordination deficits, evidenced by increased foot-faults, were noted in mice lacking PACAP.

Conclusions:

• Endogenous PACAP is essential for normal postnatal weight gain and neurobehavioral development in mice.
• PACAP deficiency leads to delayed development of key physical and neurological hallmarks during early life.