Human embryonic stem cell lines isolation, cultivation, and characterization.

Area of Science:

• Stem Cell Biology
• Developmental Biology
• Genetics

Background:

• Human embryonic stem cell (hESC) lines exhibit significant variability in transcriptional profiles, genetic, and epigenetic states despite common pluripotency.
• Differences in hESC lines can stem from individual genetics and variations in isolation and cultivation protocols.
• Standardized protocols and inter-laboratory studies are crucial for minimizing variability in hESC handling.

Purpose of the Study:

• To summarize the experience in deriving and characterizing hESC lines.
• To adapt hESCs to novel cultivation protocols.
• To provide well-characterized hESC lines for the scientific community.

Main Methods:

• Derivation of five hESC lines.
• Characterization using established criteria, including marker expression and differentiation capacity (in vitro and in vivo).
• Adaptation to feeder-free, serum-free conditions using mTeSR1 and Matrigel.

Main Results:

• Successfully derived and characterized five hESC lines.
• Four lines (hESM01-04) were adapted from feeder-dependent to feeder-free conditions.
• One line (hESMK05) was derived directly under feeder-free, serum-free conditions.
• All five lines maintained pluripotent status and normal karyotype for over 70 passages.

Conclusions:

• Established five distinct hESC lines with retained pluripotency and genetic stability.
• Demonstrated successful adaptation of hESCs to feeder-free, serum-free culture systems.
• Provided valuable, characterized hESC lines for broader scientific research.