These authors contributed equally to this work.
Peripheral CD300a+CD8+ T Lymphocytes with a Distinct Cytotoxic Molecular Signature Increase in Pregnant Women with Chronic Chorioamnionitis
Article first published online: 13 NOV 2011
© 2011 John Wiley & Sons A/S
American Journal of Reproductive Immunology
Volume 67, Issue 3, pages 184–197, March 2012
How to Cite
Xu, Y., Tarquini, F., Romero, R., Kim, C. J., Tarca, A. L., Bhatti, G., Lee, J., Sundell, I. B., Mittal, P., Kusanovic, J. P., Hassan, S. S. and Kim, J.-S. (2012), Peripheral CD300a+CD8+ T Lymphocytes with a Distinct Cytotoxic Molecular Signature Increase in Pregnant Women with Chronic Chorioamnionitis. American Journal of Reproductive Immunology, 67: 184–197. doi: 10.1111/j.1600-0897.2011.01088.x
- Issue published online: 29 JAN 2012
- Article first published online: 13 NOV 2011
- Submitted September 11, 2011; accepted October 7, 2011.
- maternal antifetal rejection;
- preterm birth;
Citation Xu Y, Tarquini F, Romero R, Kim CJ, Tarca AL, Bhatti G, Lee J, Sundell IB, Mittal P, Kusanovic JP, Hassan SS, Kim J-S. Peripheral CD300a+CD8+ T lymphocytes with a distinct cytotoxic molecular signature increase in pregnant women with chronic chorioamnionitis. Am J Reprod Immunol 2012; 67: 184–197
Problem CD300a is an immunomodulatory molecule of the immunoglobulin receptor superfamily expressed in the leukocytes of myeloid and lymphoid lineages. However, its biological function on CD8+ T lymphocytes remains largely unknown. This study was conducted to assess the biological significance of CD300a expression in T lymphocytes and to determine whether its expression in peripheral T lymphocytes changes in pregnant women presenting with antifetal rejection.
Methods of Study Microarray analysis was performed using total RNA isolated from peripheral CD300a+ and CD300a− T lymphocytes. Flow cytometric analysis of the peripheral blood samples of pregnant women and pathologic examination of the placentas were conducted.
Results A large number of genes (N = 1245) were differentially expressed between CD300a− and CD300a+ subsets of CD8+ T lymphocytes, which included CCR7, CD244, CX3CR1, GLNY, GZMB, GZMK, IL15, ITGB1, KLRG1, PRF1, and SLAMF7. Gene ontology analysis of differentially expressed genes demonstrated enrichment of biological processes such as immune response, cell death, and signal transduction. CD300a expression in CD8+ T lymphocytes was coupled to a more cytotoxic molecular signature. Of note, the proportion of CD300a+CD8+ T lymphocytes increased in pregnant women with chronic chorioamnionitis (antifetal rejection of the chorioamniotic membranes; P < 0.05).
Conclusion The findings of this study strongly suggest an increase in systemic T-lymphocyte-mediated cytotoxicity in pregnant women with chronic chorioamnionitis as a manifestation of maternal antifetal rejection.