Food for Thought: The Effects of Feeding on Neurogenesis in the Ball Python, Python regius.

Area of Science:

• Neuroscience
• Physiology
• Comparative Biology

Background:

• Pythons exhibit significant postprandial physiological plasticity, including metabolic rate increases.
• Previous research indicated increased python brain cell proliferation 6 days after a meal.
• The long-term effects of feeding on brain cell survival and maturation remained largely unknown.

Purpose of the Study:

• To confirm and extend previous findings on post-meal cell proliferation in the python brain.
• To investigate the long-term survival and maturation of newly generated brain cells over two months.
• To explore the relationship between feeding, energy balance, and neural plasticity in pythons.

Main Methods:

• Immunofluorescence using 5-bromo-2'-deoxyuridine (BrdU) to mark new cells in ball pythons (Python regius) 6 days post-meal.
• Double immunofluorescence for BrdU and the neuronal marker Fox3 to assess neural cell maturation 2 months post-meal.
• Comparison of cell proliferation and survival rates between fed and fasted control pythons.

Main Results:

• No significant increase in cell proliferation was observed at 6 days post-meal.
• Increased numbers of new cells were found in neurogenic regions 2 months after feeding.
• Fed snakes showed higher numbers of newly created non-neuronal cells compared to fasted controls.
• High cell survival rates were noted in the olfactory bulbs and lateral cortex.

Conclusions:

• Meal consumption stimulates python brain cell proliferation, with effects emerging later than previously reported.
• Increased proliferation contributes to a higher number of non-neuronal cells post-feeding.
• Feeding may offer a mild neuroprotective effect, enhancing cell survival, especially in olfactory processing regions.