From pluripotency to totipotency: an experimentalist's guide to cellular potency

Area of Science:

• Developmental Biology
• Stem Cell Biology
• Cellular Reprogramming

Background:

• Embryonic stem cells (ESCs) originate from mammalian blastocysts and are considered pluripotent, capable of forming embryonic lineages.
• While early embryonic cells can form both embryonic and extra-embryonic lineages (totipotency), ESCs are generally accepted to form only embryonic lineages.
• Recent advancements have introduced in vitro culture systems that mimic early developmental stages, potentially generating states beyond pluripotency.

Purpose of the Study:

• To investigate the experimental potential of various embryonic stem cell populations.
• To examine novel in vitro culture systems that produce cell states resembling pre-implantation development.
• To assess the nature of totipotency and its presence in these newly identified cell populations.

Main Methods:

• Review of existing experimental data on embryonic stem cell contributions in grafting experiments.
• Analysis of recently identified in vitro culture systems generating states beyond pluripotency.
• Comparative evaluation of cell populations for totipotent properties.

Main Results:

• Embryonic stem cells (ESCs) are typically pluripotent, contributing only to embryonic lineages.
• Novel in vitro systems show potential for generating cell states reminiscent of early mammalian development.
• The extent to which these in vitro systems exhibit totipotency requires further investigation.

Conclusions:

• The distinction between pluripotency and totipotency in ESCs and derived cell states remains a key area of research.
• In vitro culture systems offer new avenues to study totipotency and early developmental potential.
• Understanding these cell states is crucial for advancing regenerative medicine and developmental biology.