M Zavatti1, M Guida2, T Maraldi3, F Beretti3, L Bertoni3, G B La Sala4, A De Pol3. 1. Department of Surgical, Medical, Dental and Morphological Sciences with Interest in Transplants, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy. Electronic address: manuela.zavatti@unimore.it. 2. EURAC Research, Center for Biomedicine, Bolzano, Italy. 3. Department of Surgical, Medical, Dental and Morphological Sciences with Interest in Transplants, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy. 4. Unit of Obstetrics and Ginecology, IRCCS-Arcispedale Santa Maria Nuova, Reggio Emilia, Italy.
Abstract
AIMS: Ferutinin is a diaucane sesquiterpene with a high estrogenic activity. Since ferutinin is able to enhance osteoblastic differentiation of human amniotic fluid stem cells (hAFSCs), the aim of this study was to evaluate the role of the estrogen receptors α (ERα) and G-protein coupled receptor 30 (GPR30) in ferutinin-mediated osteoblastic differentiation. Moreover, it was investigated if MEK/ERK and PI3K/Akt signaling pathways are involved in ferutinin-induced effects. MAIN METHODS: hAFSCs were cultured in a standard medium or in an osteoblastic medium for 14 or 21days and ferutinin was added at 10-8M. Immunofluorescence techniques and Western-blot 21analysis were used to study estrogen receptors and signaling pathways. KEY FINDINGS: In both undifferentiated and differentiated hAFSCs we identified ERα and GPR30 with a nuclear or cytoplasmatic localization, respectively. The presence of ferutinin in the osteoblastic medium leads to an increase in ERα expression. To dissect the role of estrogen receptors, MPP and G15 were used to selectively block ERα and GPR30, respectively. Notably, ferutinin enhanced osteoblastic differentiation in cells challenged with G15. Ferutinin was able to increase ERK and Akt phosphorylations with a different timing activation. These phosphorylations were antagonized by PD0325901, a MEK inhibitor, and wortmannin, a PI3K inhibitor. Both MPP and G15 inhibited the ferutinin-induced MEK/ERK and PI3K/Akt pathway activations. In the osteoblastic condition, PD0325901, but not wortmannin, reduced the expression of OPN and RUNX-2, whereas ferutinin abrogated the down-modulation triggered by PD0325901. SIGNIFICANCE: PI3K/Akt pathways seems to mediate the enhancement of hAFSCs osteoblastic differentiation triggered by ferutinin through ERα.
AIMS: Ferutinin is a diaucanesesquiterpene with a high estrogenic activity. Since ferutinin is able to enhance osteoblastic differentiation of human amniotic fluid stem cells (hAFSCs), the aim of this study was to evaluate the role of the estrogen receptors α (ERα) and G-protein coupled receptor 30 (GPR30) in ferutinin-mediated osteoblastic differentiation. Moreover, it was investigated if MEK/ERK and PI3K/Akt signaling pathways are involved in ferutinin-induced effects. MAIN METHODS: hAFSCs were cultured in a standard medium or in an osteoblastic medium for 14 or 21days and ferutinin was added at 10-8M. Immunofluorescence techniques and Western-blot 21analysis were used to study estrogen receptors and signaling pathways. KEY FINDINGS: In both undifferentiated and differentiated hAFSCs we identified ERα and GPR30 with a nuclear or cytoplasmatic localization, respectively. The presence of ferutinin in the osteoblastic medium leads to an increase in ERα expression. To dissect the role of estrogen receptors, MPP and G15 were used to selectively block ERα and GPR30, respectively. Notably, ferutinin enhanced osteoblastic differentiation in cells challenged with G15. Ferutinin was able to increase ERK and Akt phosphorylations with a different timing activation. These phosphorylations were antagonized by PD0325901, a MEK inhibitor, and wortmannin, a PI3K inhibitor. Both MPP and G15 inhibited the ferutinin-induced MEK/ERK and PI3K/Akt pathway activations. In the osteoblastic condition, PD0325901, but not wortmannin, reduced the expression of OPN and RUNX-2, whereas ferutinin abrogated the down-modulation triggered by PD0325901. SIGNIFICANCE: PI3K/Akt pathways seems to mediate the enhancement of hAFSCs osteoblastic differentiation triggered by ferutinin through ERα.
Authors: Livio Casarini; Laura Riccetti; Francesco De Pascali; Lisa Gilioli; Marco Marino; Eugenia Vecchi; Daria Morini; Alessia Nicoli; Giovanni Battista La Sala; Manuela Simoni Journal: Int J Mol Sci Date: 2017-04-28 Impact factor: 5.923
Authors: Maryam Iravani; Marie K Lagerquist; Elham Karimian; Andrei S Chagin; Claes Ohlsson; Lars Sävendahl Journal: Endocr Connect Date: 2019-09 Impact factor: 3.335