title: Amniotic membrane-derived mesenchymal cells and their conditioned media: potential candidates for uterine regenerative therapy in the horse.
abstract: Amniotic membrane-derived mesenchymal cells (AMCs) are considered suitable candidates for a variety of cell-based applications. In view of cell therapy application in uterine pathologies, we studied AMCs in comparison to cells isolated from the endometrium of mares at diestrus (EDCs) being the endometrium during diestrus and early pregnancy similar from a hormonal standpoint. In particular, we demonstrated that amnion tissue fragments (AM) shares the same transcriptional profile with endometrial tissue fragments (ED), expressing genes involved in early pregnancy (AbdB-like Hoxa genes), pre-implantation conceptus development (Erα, PR, PGRMC1 and mPR) and their regulators (Wnt7a, Wnt4a). Soon after the isolation, only AMCs express Wnt4a and Wnt7a. Interestingly, the expression levels of prostaglandin-endoperoxide synthase 2 (PTGS2) were found greater in AM and AMCs than their endometrial counterparts thus confirming the role of AMCs as mediators of inflammation. The expression of nuclear progesterone receptor (PR), membrane-bound intracellular progesterone receptor component 1 (PGRMC1) and membrane-bound intracellular progesterone receptor (mPR), known to lead to improved endometrial receptivity, was maintained in AMCs over 5 passages in vitro when the media was supplemented with progesterone. To further explore the potential of AMCs in endometrial regeneration, their capacity to support resident cell proliferation was assessed by co-culturing them with EDCs in a transwell system or culturing in the presence of AMC-conditioned medium (AMC-CM). A significant increase in EDC proliferation rate exhibited the crucial role of soluble factors as mediators of stem cells action. The present investigation revealed that AMCs, as well as their derived conditioned media, have the potential to improve endometrial cell replenishment when low proliferation is associated to pregnancy failure. These findings make AMCs suitable candidates for the treatment of endometrosis in mares.
authors.affiliation: Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy.
authors.forename: Bruna
authors.initials: B
authors.lastname: Corradetti
authors.affiliation: Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy.
authors.forename: Alessio
authors.initials: A
authors.lastname: Correani
authors.affiliation: Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy.
authors.forename: Alessio
authors.initials: A
authors.lastname: Romaldini
authors.affiliation: Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy.
authors.forename: Maria Giovanna
authors.initials: MG
authors.lastname: Marini
authors.affiliation: Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Bizzaro
authors.affiliation: Large Animal Hospital, Reproduction Unit, Università degli Studi di Milano, Lodi, Italy.
authors.forename: Claudia
authors.initials: C
authors.lastname: Perrini
authors.affiliation: Large Animal Hospital, Reproduction Unit, Università degli Studi di Milano, Lodi, Italy; Department of Veterinary Science for Animal Health, Production and Food Safety, Università degli Studi di Milano, Milan, Italy.
authors.forename: Fausto
authors.initials: F
authors.lastname: Cremonesi
authors.affiliation: Large Animal Hospital, Reproduction Unit, Università degli Studi di Milano, Lodi, Italy.
authors.forename: Anna
authors.initials: A
authors.lastname: Lange-Consiglio
mesh_terms: D000650:Amnion / Q000166:cytology*; D000818:Animals; D049109:Cell Proliferation; D017077:Culture Media, Conditioned; D004717:Endometrium / Q000166:cytology; D005260:Female; D006736:Horses; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D011247:Pregnancy; D012038:Regeneration; D014599:Uterus / Q000166:cytology* / Q000502:physiology*
chemical_list: D017077:Culture Media, Conditioned