Cord blood and amniotic membrane extract eye drop preparations display immune-suppressive and regenerative properties
Samarkanova, Dinara (Universitat Autònoma de Barcelona. Departament de Medicina)
Cox, Steven (Anthony Nolan Research Institute)
Hernandez, Diana (Anthony Nolan Research Institute)
Rodriguez, Luciano (Banc de Sang i Teixits)
Pérez, Maria Luisa (Institut d'Investigació Biomèdica Sant Pau)
Madrigal, Alejandro (Banc de Sang i Teixits)
Vilarrodona, Anna (Banc de Sang i Teixits)
Querol, Sergi (Hospital Universitari Vall d'Hebron. Institut de Recerca)
Casaroli-Marano, Ricardo Pedro (Hospital Clínic i Provincial de Barcelona)
Universitat Autònoma de Barcelona

Date:	2021
Abstract:	Diseases and injuries that compromise the ocular surface cause considerable patient distress and have long term consequences for their quality of life. Treatment modalities that can address the delicate balance of tissue regeneration, inflammation and maintenance of corneal transparency are therefore needed. We have recently formulated two novel eye drops from placental tissues: cord blood platelet lysate (CBED) and amniotic membrane extract eye drops (AMED), which can be used to treat severe ocular disorders. Here we characterise these two preparations by measuring: (a) growth factors (GF) and cytokines composition, (b) promotion of human corneal epithelial cell (HCEC) growth and (c) effects on immune cells in a lymphocyte culture assay. Finally, their bioavailability was assayed in an ex vivo porcine corneal model. We show that both preparations contain GF and cytokines that were able to promote the in vitro growth of HCEC and support repair in an in vitro scratch test. When assessed in a lymphocyte culture, both favoured immune suppression reducing the cellular expression of NKG2D and CD107a as well as the production of interferon gamma (IFN-γ) in natural killer, NKT and T cells. Regarding bioavailability, CBED active molecules were found mainly in the pre-corneal fraction with some penetration into the corneal fraction, in an ex vivo model. In summary, both placental-derived allogeneic preparations, CBED and AMED, display regenerative and immunomodulatory capabilities. These results will help define mechanisms of action and the best indications and doses of each product for use in a particular patient and support the development of off-the-shelf therapies for ocular surface pathologies in which wound healing defects and inflammatory events are contributing factors.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Immunology ; Medical research
Published in:	Scientific reports, Vol. 11 (july 2021) , ISSN 2045-2322

DOI: 10.1038/s41598-021-93150-7
PMID: 34215804

12 p, 1.4 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Health sciences and biosciences > Institut de Recerca Sant Pau
Articles > Research articles
Articles > Published articles