Prospect of using decellularized human placenta and cow placentome for creation of new organs: targeting the liver (part I: anatomic study).

Introduction: This paper presents anatomic studies of decellularized human placenta and cow placentome and proves that there is a possibility to create a scaffold using the natural microvascular structure for growing organs and tissues.

Materials And Methods: The anatomic studies were conducted on 20 full-term placentas from human donors, and placentomes collected from 8 cows. Before the anatomic studies of human placenta and cow placentome, decellularization was conducted. For visualization of vessels, 50% Latex in water (Nairit L3) through the umbilical cord artery and vein was injected. Corrosion casts were also prepared.

Results: An important feature in the transplantation of microfragments of the liver tissue is the blood supply system of the piled chorion, which consists of the main vascular trunks, and perivascular and superficial capillary network. Conditionally, based on the degree of difficulty, there are several types of grouping of the capillaries in terminal pile: simple capillary knot, coiled capillary knot, and complexly organized tangle-shaped capillary network with the richly anastomosing crimped microvessels. A similar pattern was observed in the terminal pile of the placentomes of the cow. For the creation of the auxiliary liver and connection of it into the systemic circulation of the recipient, we can use this exclusiveness of the angioarchitechtonics.

Conclusions: Anatomic studies demonstrated that decellularized human placenta, as well as cow placentome, can be used as a scaffold for growth of organs and tissues in vitro and in vivo.