Extra-hepatic arterial branching pattern in the common marmoset (Callithrix jacchus).

Area of Science:

• Comparative anatomy
• Primate research
• Vascular anatomy

Background:

• Common marmosets (Callithrix jacchus) are valuable research models due to ease of care and human phylogenetic proximity.
• Inadequate anatomical knowledge, particularly of liver arterial supply, hinders experimental design in marmosets.
• Species-specific arterial patterns in primate livers necessitate detailed investigation for accurate research.

Purpose of the Study:

• To elucidate the extra-hepatic arterial branching patterns supplying the liver in common marmosets.
• To establish a foundational anatomical understanding for liver-related research in this species.
• To address the knowledge gap regarding marmoset liver vasculature.

Main Methods:

• Dissection of 15 common marmosets (6 male, 9 female).
• Utilized latex injection to visualize and trace arterial vasculature.
• Focused on the extra-hepatic arterial supply to the liver.

Main Results:

• The common marmoset liver demonstrated variable arterial supply, ranging from single to triple sources.
• Common arteries involved included the hepatic artery, left gastric artery, caudal phrenic artery, and celiac artery.
• Specific patterns identified included single hepatic artery supply (2 cases), double supply (e.g., hepatic and left gastric in 5 cases), and triple supply (e.g., hepatic, left gastric, and caudal phrenic in 6 cases).

Conclusions:

• The study identified characteristic and variable arterial supply patterns to the common marmoset liver.
• This detailed anatomical data provides a crucial prerequisite for conducting precise liver-related experiments in marmosets.
• Understanding these vascular variations is essential for the ethical and effective use of marmosets in biomedical research.