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MHC control of cell position in vitro
C A Birkby1, A S Curtis, M McGrath
1Department of Pathology, University of Cambridge, UK.
Journal of Cell Science
|February 1, 1988
Summary
Mouse endothelial cells show sorting-out behavior based on MHC type. Cell segregation occurs when D locus alleles mismatch, but IC locus matching can override this, influencing cell sorting in cultures.
Area of Science:
- Immunology
- Cell Biology
- Genetics
Background:
- Cell-cell interactions are crucial in tissue development and function.
- Understanding the molecular basis of cell sorting is vital for regenerative medicine and immunology.
- Congenic mouse strains provide valuable models for studying genetic influences on cell behavior.
Purpose of the Study:
- To investigate the two-dimensional sorting-out behavior of mouse pulmonary endothelial cells from congenic strains.
- To determine the role of specific Major Histocompatibility Complex (MHC) loci in mediating cell segregation.
- To analyze the influence of genetic matching and mismatching at MHC loci on cell sorting patterns.
Main Methods:
- Utilized dense confluent cultures of mouse pulmonary endothelial cells where mitosis is infrequent.
- Employed autoradiographic labeling with [3H]thymidine and immunofluorescence techniques to detect cell MHC type.
- Developed and applied a novel statistical model to analyze counts of contiguous labeled and unlabeled neighbors around a central labeled cell.
Main Results:
- Observed significant segregation (sorting-out) when alleles of the D locus within the H-2 complex were mismatched between mixed cell strains.
- Found that matching at the IC locus (or loci to its right) can override the segregation effect caused by D locus mismatch.
- Demonstrated easily detectable sorting-out after 2 days of culture, with cells forming distinct groups of up to 12 of the same type.
Conclusions:
- Cell sorting behavior in mouse pulmonary endothelial cells is strongly influenced by genetic differences at the MHC, particularly the D locus.
- The IC locus plays a critical role in modulating or overriding MHC-dependent cell segregation.
- These findings highlight the importance of MHC compatibility in cell-cell recognition and organization, with implications for tissue engineering and transplantation.