Transcriptome analysis of the response of Burmese python to digestion

Area of Science:

• Zoology
• Physiology
• Genomics

Background:

• Burmese pythons (Python bivittatus) display extreme feeding behaviors, making them valuable models for studying physiological and metabolic adaptations.
• Understanding the molecular mechanisms behind their response to refeeding after prolonged fasting is crucial for comparative physiology.

Purpose of the Study:

• To investigate postprandial physiological changes in Burmese pythons using transcriptome sequencing.
• To identify differentially expressed genes and secreted proteins in visceral organs and gastric fluid following a large meal.

Main Methods:

• Transcriptome sequencing of five visceral organs (heart, liver, stomach, pancreas, intestine) from fasting and refed pythons (24 and 48 hours post-meal).
• De novo transcriptome assembly and gene annotation.
• Proteomic analysis of plasma and gastric fluid enzymes.
• Identification of highly expressed genes and secreted proteins.

Main Results:

• A high-quality transcriptome with 34,423 transcripts (57% annotated) was constructed.
• Significant differential gene expression was observed across organs, with notable changes in the liver (206 genes) and intestine (158 genes).
• 314 secreted proteins were identified in gastric fluid, and digestion correlated with upregulated metabolic process-related genes.

Conclusions:

• Refeeding induces substantial translational and metabolic changes in Burmese pythons.
• The study provides insights into the molecular basis of rapid physiological adaptation in response to feeding in reptiles.
• Advanced mass spectrometry techniques enable the identification of gastric juice proteins during digestion.