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Mass Spectrometric Analysis of Glycosphingolipid Antigens
Published on: April 16, 2013
Changes in glycosphingolipid composition during differentiation of human embryonic stem cells to ectodermal or
Yuh-Jin Liang1, Bei-Chia Yang, Jin-Mei Chen
1Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan.
Stem Cells (Dayton, Ohio)
|September 30, 2011
Summary
Glycosphingolipid (GSL) patterns change during human embryonic stem cell (hESC) differentiation. These GSL alterations correlate with specific cell lineages, indicating their role in directed differentiation.
Area of Science:
- Cell Biology
- Biochemistry
- Developmental Biology
Background:
- Glycosphingolipids (GSLs) are key membrane components involved in cell adhesion and signaling.
- Previous work showed GSL structure changes during human embryonic stem cell (hESC) differentiation into embryoid bodies (EBs).
Purpose of the Study:
- To investigate if GSL alterations correlate with lineage-specific differentiation of hESCs.
- To analyze GSL changes during differentiation into neural progenitors and endodermal cells.
Main Methods:
- Matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) and tandem mass spectrometry (MS/MS) were used.
- GSLs were analyzed during hESC differentiation into neural progenitors and endodermal cells.
Main Results:
- Differentiation into neural progenitors led to a shift from globo- and lacto-series GSLs to ganglio-series, notably GD3.
- Differentiation into endodermal cells showed distinct GSL patterns, with Gb(4) Ceramide being prominent and GD3 absent.
- Changes in GSL profiles were linked to altered expression of key glycosyltransferases.
Conclusions:
- GSL profiles are closely associated with lineage specificity during hESC differentiation.
- GSL alterations serve as indicators of directed differentiation pathways in hESCs.
