TMED2/p24β1 is expressed in all gestational stages of human placentas and in choriocarcinoma cell lines.
Members of the transmembrane emp24 domain (Tmed)/p24 family of proteins are required for transport of proteins between the endoplasmic reticulum and the Golgi. One member of this family, Tmed2/p24β1, is expressed during placental development in mice and its expression is required for normal development of the labyrinth layer. Although TMED2 is conserved in humans, little is known about its expression and function in human placenta. We examined TMED2 expression in human placenta between 5.5 and 40 weeks of gestation and showed that TMED2 is expressed in syncytiotrophoblast, cytotrophoblast, and stromal cells. We also found high levels of TMED2 expression in BeWo but not in JEG-3 choriocarcinoma cell line. We used the BeWo cell line to determine TMED2 subcellular localization in placental cells and show its co-localization with the endoplasmic reticulum Golgi intermediate compartment. Our findings show conservation of TMED2 expression in human placenta and suggest that this protein may also play a role during placental development in humans.
Department of Human Genetics, McGill University, 1205 Avenue Docteur Penfield, N5/13, Montreal, Quebec H3A 1B1, Canada.
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Zakariyah
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Hou
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Slim
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Jerome-Majewska
D045744:Cell Line, Tumor; D002822:Choriocarcinoma / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D005260:Female; D018507:Gene Expression Regulation, Developmental; D015972:Gene Expression Regulation, Neoplastic; D005865:Gestational Age; D006801:Humans; D008565:Membrane Proteins / Q000235:genetics* / Q000378:metabolism / Q000502:physiology; D010920:Placenta / Q000378:metabolism*; D010929:Placentation / Q000235:genetics / Q000502:physiology; D011247:Pregnancy; D011261:Pregnancy Trimester, First / Q000235:genetics / Q000378:metabolism; D047929:Term Birth / Q000235:genetics / Q000378:metabolism; D014594:Uterine Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D033921:Vesicular Transport Proteins
D008565:Membrane Proteins; C524397:TMED2 protein, human; D033921:Vesicular Transport Proteins