Maternal circulating leukocytes display early chemotactic responsiveness during late gestation

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dc.contributor.authorGomez-Lopez, Nardhy
dc.contributor.authorTanaka, Satomi
dc.contributor.authorZaeem, Zoya
dc.contributor.authorMetz, Gerlinde A. S.
dc.contributor.authorOlson, David M.
dc.date.accessioned2017-04-27T18:40:25Z
dc.date.available2017-04-27T18:40:25Z
dc.date.issued2013
dc.descriptionSherpa Romeo green journal: open accessen_US
dc.description.abstractBackground: Parturition has been widely described as an immunological response; however, it is unknown how this is triggered. We hypothesized that an early event in parturition is an increased responsiveness of peripheral leukocytes to chemotactic stimuli expressed by reproductive tissues, and this precedes expression of tissue chemotactic activity, uterine activation and the systemic progesterone/estradiol shift. Methods: Tissues and blood were collected from pregnant Long-Evans rats on gestational days (GD) 17, 20 and 22 (term gestation). We employed a validated Boyden chamber assay, flow cytometry, quantitative real timepolymerase chain reaction, and enzyme-linked immunosorbent assays. Results: We found that GD20 maternal peripheral leukocytes migrated more than those from GD17 when these were tested with GD22 uterus and cervix extracts. Leukocytes on GD20 also displayed a significant increase in chemokine (C-C motif) ligand 2 (Ccl2) gene expression and this correlated with an increase in peripheral granulocyte proportions and a decrease in B cell and monocyte proportions. Tissue chemotactic activity and specific chemokines (CCL2, chemokine (C-X-C motif) ligand 1/CXCL1, and CXCL10) were mostly unchanged from GD17 to GD20 and increased only on GD22. CXCL10 peaked on GD20 in cervical tissues. As expected, prostaglandin F2a receptor and oxytocin receptor gene expression increased dramatically between GD20 and 22. Progesterone concentrations fell and estradiol-17b concentrations increased in peripheral serum, cervical and uterine tissue extracts between GD20 and 22. Conclusion: Maternal circulating leukocytes display early chemotactic responsiveness, which leads to their infiltration into the uterus where they may participate in the process of parturition.en_US
dc.description.peer-reviewYesen_US
dc.identifier.citationGomez-Lopez, N., Tanaka, S., Zaeem, Z., Metz, G.A.S., & Olson, D. M. (2013). Maternal circulating leukocytes display early chemotactic responsiveness during late gestation. BMC Pregnancy & Childbirth, 13(Suppl): 58. Retrieved from http://www.biomedcentral.com/1471-2393/13/S1/S8en_US
dc.identifier.urihttps://hdl.handle.net/10133/4832
dc.language.isoen_USen_US
dc.publisherBiomed Central Ltden_US
dc.publisher.departmentDepartment of Neuroscienceen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionUniversity of Albertaen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.subjectMaternal circulating leukocytesen_US
dc.subjectChemotacticen_US
dc.subjectGestationen_US
dc.subjectLong-Evans raten_US
dc.subjectParturtion
dc.subject.lcshRats--Pregnancy
dc.subject.lcshRats--Parturition
dc.subject.lcshLeucocytes
dc.subject.lcshChemokines
dc.titleMaternal circulating leukocytes display early chemotactic responsiveness during late gestationen_US
dc.typeArticleen_US
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