Proangiogenic immature myeloid cells populate the human placenta and their presence correlates with placental and birthweight

Objective To determine whether proangiogenic immature myeloid cells are present in human placentas. Study Design Biopsies were obtained from 61 placentas of term pregnancies. Percentage of CD45+ CD33+ LIN2− HLADR− immature myeloid cells of total CD45+ hematopoietic cells was determined by flow cytom...

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Veröffentlicht in:American journal of obstetrics and gynecology 2012-08, Vol.207 (2), p.141.e1-141.e5
Hauptverfasser: Mei-Dan, Elad, MD, Fainaru, Ofer, MD, PhD, Hantisteanu, Shay, Msc, Shavit, Tal, MD, Ellenbogen, Adrian, MD, Hallak, Mordechai, MD
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container_end_page 141.e5
container_issue 2
container_start_page 141.e1
container_title American journal of obstetrics and gynecology
container_volume 207
creator Mei-Dan, Elad, MD
Fainaru, Ofer, MD, PhD
Hantisteanu, Shay, Msc
Shavit, Tal, MD
Ellenbogen, Adrian, MD
Hallak, Mordechai, MD
description Objective To determine whether proangiogenic immature myeloid cells are present in human placentas. Study Design Biopsies were obtained from 61 placentas of term pregnancies. Percentage of CD45+ CD33+ LIN2− HLADR− immature myeloid cells of total CD45+ hematopoietic cells was determined by flow cytometry. Location of immature myeloid cells in the placenta was identified using confocal microscopy. The proangiogenic potential of immature myeloid cells was analyzed by endothelial tube formation. Results Immature myeloid cells comprise ∼25% of human placental CD45+ hematopoietic cells and infiltrate placentas in proximity of blood vessels. The percentage of immature myeloid cells correlated positively with placental weight (r 2 = 0.108, P = .01) and birthweight (r 2 = 0.087, P = .02). Endothelial tube formation was increased in the presence of immature myeloid cells as compared with the presence of CD45+ LIN2+ control cells. Conclusion Human placentas are populated by immature myeloid cells in the proximity of blood vessels. Consistent with their involvement in angiogenesis, immature myeloid cells accelerated endothelial tube formation. The presence of immature myeloid cells in pathologic pregnancies warrants further studies.
doi_str_mv 10.1016/j.ajog.2012.05.025
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Study Design Biopsies were obtained from 61 placentas of term pregnancies. Percentage of CD45+ CD33+ LIN2− HLADR− immature myeloid cells of total CD45+ hematopoietic cells was determined by flow cytometry. Location of immature myeloid cells in the placenta was identified using confocal microscopy. The proangiogenic potential of immature myeloid cells was analyzed by endothelial tube formation. Results Immature myeloid cells comprise ∼25% of human placental CD45+ hematopoietic cells and infiltrate placentas in proximity of blood vessels. The percentage of immature myeloid cells correlated positively with placental weight (r 2 = 0.108, P = .01) and birthweight (r 2 = 0.087, P = .02). Endothelial tube formation was increased in the presence of immature myeloid cells as compared with the presence of CD45+ LIN2+ control cells. Conclusion Human placentas are populated by immature myeloid cells in the proximity of blood vessels. Consistent with their involvement in angiogenesis, immature myeloid cells accelerated endothelial tube formation. The presence of immature myeloid cells in pathologic pregnancies warrants further studies.</description><identifier>ISSN: 0002-9378</identifier><identifier>EISSN: 1097-6868</identifier><identifier>DOI: 10.1016/j.ajog.2012.05.025</identifier><identifier>PMID: 22840728</identifier><language>eng</language><publisher>United States: Mosby, Inc</publisher><subject>Adult ; angiogenesis ; Antigens, CD - metabolism ; Antigens, Differentiation, Myelomonocytic - metabolism ; Birth Weight ; Endothelium, Vascular - embryology ; Female ; Flow Cytometry ; Humans ; immature myeloid cells ; Infant, Newborn ; Leukocyte Common Antigens - metabolism ; Microscopy, Confocal ; Myeloid Cells - metabolism ; Myeloid Cells - physiology ; Neovascularization, Physiologic ; Obstetrics and Gynecology ; Organ Size ; placenta ; Placenta - anatomy &amp; histology ; Placenta - cytology ; Pregnancy ; Sialic Acid Binding Ig-like Lectin 3</subject><ispartof>American journal of obstetrics and gynecology, 2012-08, Vol.207 (2), p.141.e1-141.e5</ispartof><rights>Mosby, Inc.</rights><rights>2012 Mosby, Inc.</rights><rights>Copyright © 2012 Mosby, Inc. 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Study Design Biopsies were obtained from 61 placentas of term pregnancies. Percentage of CD45+ CD33+ LIN2− HLADR− immature myeloid cells of total CD45+ hematopoietic cells was determined by flow cytometry. Location of immature myeloid cells in the placenta was identified using confocal microscopy. The proangiogenic potential of immature myeloid cells was analyzed by endothelial tube formation. Results Immature myeloid cells comprise ∼25% of human placental CD45+ hematopoietic cells and infiltrate placentas in proximity of blood vessels. The percentage of immature myeloid cells correlated positively with placental weight (r 2 = 0.108, P = .01) and birthweight (r 2 = 0.087, P = .02). Endothelial tube formation was increased in the presence of immature myeloid cells as compared with the presence of CD45+ LIN2+ control cells. Conclusion Human placentas are populated by immature myeloid cells in the proximity of blood vessels. Consistent with their involvement in angiogenesis, immature myeloid cells accelerated endothelial tube formation. 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subjects Adult
angiogenesis
Antigens, CD - metabolism
Antigens, Differentiation, Myelomonocytic - metabolism
Birth Weight
Endothelium, Vascular - embryology
Female
Flow Cytometry
Humans
immature myeloid cells
Infant, Newborn
Leukocyte Common Antigens - metabolism
Microscopy, Confocal
Myeloid Cells - metabolism
Myeloid Cells - physiology
Neovascularization, Physiologic
Obstetrics and Gynecology
Organ Size
placenta
Placenta - anatomy & histology
Placenta - cytology
Pregnancy
Sialic Acid Binding Ig-like Lectin 3
title Proangiogenic immature myeloid cells populate the human placenta and their presence correlates with placental and birthweight
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