Search results for "Umbilical"

Extending the usefulness of extraembryonic mesenchymal stem cellsin regenerative medicine: expression of novel markers, immunoregulatory molecules, a…

2010

Mesenchymal stem cells (MSC) are considered promising tools in regenerative medicine applications. Even if they are already applied clinically, their extended characterization is being increasingly viewed as a needed feature, in order to avoid contrasting results when translating “in vitro” experiments to “in vivo” approaches. We recently demonstrated in human MSC isolated from the umbilical cord matrix (HEMSC) the expression of novel markers indicative of their stemness, as well as differentiative and immune properties [1]. HEMSC were cultured and subject to multiple molecular and morphological analyses to determine the expression of markers of interest. Undifferentiated HEMSC expressed im…

Isolation and phenotypical characterization of mesenchymal stem cells from the Wharton's jelly of pre-term human umbilical cord.

2014

Non-classical type I HLAs and B7 costimulators revisited: analysis of expression and immunomodulatory role in undifferentiated and differentiated MSC…

2011

Introduction. Wharton’s jelly (WJ), the main constituent of umbilical cord, emerged as a reliable and uncontroversial source of mesenchymal stem cells (MSC). WJ-MSC show unique ability in crossing lineage borders, therefore being capable to trans-ifferentiate towards mature cytotypes derived from the three germ layers. As other fetal-associated cells, WJ-MSC express several immunomodulatory molecules, essential during the initial phases of human development and for the processes linked to the tolerance of the mother to the semiallogeneic embryo. Very few data are present in literature on the maintenance of the immune privilege of the naïve cells after performing differentiation. Our previou…

Characterization of the in vitro immunomodulatory properties of mesenchymal stem cells isolated from Wharton's jelly: new actors at play

2014

Shifting back the fetomaternal interface: WHarton's jelly mesenchymal stem cells immunomodulatory molecules and their journey from umbilical cord to …

2014

Cytocheratins Identification in Human Umbilical Cord at Term.

2009

Introduction. Cytokeratins (Cks) are the proteins that constitute intermediate filaments. The pattern of expression of cytokeratins is frequently organ or tissue specific and depends mainly on the type of epithelium, the level of differentiation and the stage of development. With this study we tried to make light on the pattern of expression of a wide range of CKs in human umbilical cord at term. Materials and methods. We investigated the expression of CKs through immunohistochemistry and RT-PCR assay. Results. AE1/AE3 antibody reacts with the basic CKs 1, 2, 3, 4, 5, 6, 7 and 8, and with the acidic CKs 10, 13, 14, 15, 16 and 19. The reactivity for this antibody is localized in the amniotic…

Cytokeratins identification in human Umbilical Cord at Term

2009

Expression of cytokeratins in human umbilical cord at term

2009

Background. Cytokeratins are the proteins that costitute intermediate filaments. In the cytoplasm, keratin filaments extend from the nucleus to the plasma membrane. This link is important for the structural organization of the cytoplasm and for many cellular processes such as mitosis, cell movement, cell differentiation and adhesion. The pattern of expression of cytokeratins is frequently organ or tissue specific and depends mainly on the type of epithelium, the level of differentiation and the stage of development. The expression of cytokeratins in umbilical cord has been investigated by many groups, but these previous studies gave only fragmentary informations: each single study focused o…

Expression and localization of matrix metalloproteinases MMPs in human umbilical cord

2009

Role of Matrix Metalloproteinases 2,9 (MMP-2,-9), Orphanin FQ and Others Peptides in Vascular Tone of Human Umbilical Cord at Term

2008

Umbilical cord is the structure that connects the fetus to the placenta. Umbilical cord at term is made of three vessels surrounded by the Wharton's Jelly, a mocous connective tissue rich in glycosaminoglycans, proteoglycans and different types of collagens and other microfibrils, which are responsible for its elasticity and its mechanical properties. Umbilical cord seems to lack any capillaries or lymphatics and umbilical vessels are unique in lacking any innervation of the vascular tone, and the expression of some enzymes responsible for the remodelling of the extracellular matrix. Trough immunihistochemistry we investigated the expression of matrix metallo-peptidase 2 and 9 (MMP-2, MMP-9…