Ping Li1, Hui Peng2, Wen-Hui Lu3, Han-Lin Shuai4, Qing-Bin Zha4, Cheung-Kwan Yeung5, He Li3, Li-Jing Wang6, Kenneth Ka Ho Lee7, Wei-Jie Zhu8, Xuesong Yang9. 1. Department of Nursing Science, Jinan University, Guangzhou 510632, China; Key Laboratory for Regenerative Medicine of the Ministry of Education, Department of Histology and Embryology, School of Medicine, Jinan University, Guangzhou 510632, China. 2. Department of Pathology, Guangdong Provincial Hospital of TCM, Guangzhou 510120, China. 3. Key Laboratory for Regenerative Medicine of the Ministry of Education, Department of Histology and Embryology, School of Medicine, Jinan University, Guangzhou 510632, China. 4. Department of Gynecology & Obstetrics, The First Affiliated Hospital, Jinan University, Guangzhou 510630, China. 5. Key Laboratory for Regenerative Medicine of the Ministry of Education, Department of Histology and Embryology, School of Medicine, Jinan University, Guangzhou 510632, China; Stem Cell and Regeneration Thematic Research Programme, School of Biomedical Sciences, Chinese University of Hong Kong, Shatin, Hong Kong. 6. Institute of Vascular Biological Science, Guangdong Pharmaceutical University, Guangzhou 510006, China. 7. Stem Cell and Regeneration Thematic Research Programme, School of Biomedical Sciences, Chinese University of Hong Kong, Shatin, Hong Kong. 8. Department of Developmental and Regenerative Biology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China. Electronic address: tzhuwj@jnu.edu.cn. 9. Key Laboratory for Regenerative Medicine of the Ministry of Education, Department of Histology and Embryology, School of Medicine, Jinan University, Guangzhou 510632, China. Electronic address: yang_xuesong@126.com.
Abstract
INTRODUCTION: For ectopic tubal pregnancy to be viable, it requires a supporting vascular network and functioning trophoblast. Slit2/Robo1 signaling plays an important role in placental angiogenesis during normal pregnancy. Hence, we here investigated whether or not Slit2/Robo1 signaling also had an impact in ectopic tubal pregnancy. METHODS: The Slit2 and Robo1 expression pattern relevant to trophoblast invasive behavior and vascular remodeling was studied in human tubal placenta obtained from patients with ectopic pregnancy (5-8weeks gestation), The trophoblast development, vascular architecture and Robo1 expression pattern were observed in Slit2 overexpression (Slit2-Tg) and C57BL mice placenta (E13.5 and E15.5). RESULTS: Marked with CK-7 and Vimentin, the vessel profiles of fallopian tube were classified into four stages. In the presence of extravillous trophoblast (EVT), stellate-shaped and polygonal-shaped EVTs were observed, and the stellate-shaped EVT showed the higher Slit2 expression (P < 0.01) but lower Robo1 expression (P < 0.05) than polygonal-shaped cells. By contrast, a temporary Slit2 up-regulation in remodeling vessel and Slit2 down-regulation in remodeled vessel of polygonal-shape extravillous trophoblast cells occurred in tubal pregnancies. In Slit2-Tg mice E13.5 and E15.5 placenta, Slit2 overexpression promoted vascular remodeling by increasing in the diameter of the maternal blood sinusoids and fetal capillaries, but enhanced the thickness of trophoblast and vasculature at E15.5 Slit2-Tg mice. CONCLUSIONS: The varying Slit2 and Robo1 expression in EVTs was associated with trophoblast invasion and probably plays an important role in the events of blood vessel remodeling of the fallopian tube tissues.
INTRODUCTION: For ectopic tubal pregnancy to be viable, it requires a supporting vascular network and functioning trophoblast. Slit2/Robo1 signaling plays an important role in placental angiogenesis during normal pregnancy. Hence, we here investigated whether or not Slit2/Robo1 signaling also had an impact in ectopic tubal pregnancy. METHODS: The Slit2 and Robo1 expression pattern relevant to trophoblast invasive behavior and vascular remodeling was studied in human tubal placenta obtained from patients with ectopic pregnancy (5-8weeks gestation), The trophoblast development, vascular architecture and Robo1 expression pattern were observed in Slit2 overexpression (Slit2-Tg) and C57BL mice placenta (E13.5 and E15.5). RESULTS: Marked with CK-7 and Vimentin, the vessel profiles of fallopian tube were classified into four stages. In the presence of extravillous trophoblast (EVT), stellate-shaped and polygonal-shaped EVTs were observed, and the stellate-shaped EVT showed the higher Slit2 expression (P < 0.01) but lower Robo1 expression (P < 0.05) than polygonal-shaped cells. By contrast, a temporary Slit2 up-regulation in remodeling vessel and Slit2 down-regulation in remodeled vessel of polygonal-shape extravillous trophoblast cells occurred in tubal pregnancies. In Slit2-Tg mice E13.5 and E15.5 placenta, Slit2 overexpression promoted vascular remodeling by increasing in the diameter of the maternal blood sinusoids and fetal capillaries, but enhanced the thickness of trophoblast and vasculature at E15.5 Slit2-Tg mice. CONCLUSIONS: The varying Slit2 and Robo1 expression in EVTs was associated with trophoblast invasion and probably plays an important role in the events of blood vessel remodeling of the fallopian tube tissues.
Authors: Heli Tiensuu; Antti M Haapalainen; Minna K Karjalainen; Anu Pasanen; Johanna M Huusko; Riitta Marttila; Marja Ojaniemi; Louis J Muglia; Mikko Hallman; Mika Rämet Journal: PLoS Genet Date: 2019-06-13 Impact factor: 5.917
Authors: Jennifer N Kiser; Erin Clancey; Joao G N Moraes; Joseph Dalton; Gregory W Burns; Thomas E Spencer; Holly L Neibergs Journal: BMC Genomics Date: 2019-11-12 Impact factor: 3.969