Repeated freezing procedures preserve structural and functional properties of amniotic membrane for application in ophthalmology

Downloadstatistik des Dokuments (Auswertung nach COUNTER):

Pogozhykh, O.; Hofmann, N.; Gryshkov, O.; von Kaisenberg, C.; Mueller, M. et al.: Repeated freezing procedures preserve structural and functional properties of amniotic membrane for application in ophthalmology. In: International Journal of Molecular Sciences (IJMS) 21 (2020), Nr. 11, 4029. DOI: https://doi.org/10.3390/ijms21114029

Version im Repositorium

Zum Zitieren der Version im Repositorium verwenden Sie bitte diesen DOI: https://doi.org/10.15488/10703

Zeitraum, für den die Download-Zahlen angezeigt werden:

Jahr: 
Monat: 

Summe der Downloads: 67




Kleine Vorschau
Zusammenfassung: 
For decades, the unique regenerative properties of the human amniotic membrane (hAM) have been successfully utilized in ophthalmology. As a directly applied biomaterial, the hAM should be available in a ready to use manner in clinical settings. However, an extended period of time is obligatory for performing quality and safety tests. Hence, the low temperature storage of the hAM is a virtually inevitable step in the chain from donor retrieval to patient application. At the same time, the impact of subzero temperatures carries an increased risk of irreversible alterations of the structure and composition of biological objects. In the present study, we performed a comprehensive analysis of the hAM as a medicinal product; this is intended for a novel strategy of application in ophthalmology requiring a GMP production protocol including double freezing– thawing cycles. We compared clinically relevant parameters, such as levels of growth factors and extracellular matrix proteins content, morphology, ultrastructure and mechanical properties, before and after one and two freezing cycles. It was found that epidermal growth factor (EGF), transforming growth factor beta 1 (TGF-ß1), hepatocyte growth factor (HGF), basic fibroblast growth factor (bFGF), hyaluronic acid, and laminin could be detected in all studied conditions without significant differences. Additionally, histological and ultrastructure analysis, as well as transparency and mechanical tests, demonstrated that properties of the hAM required to support therapeutic efficacy in ophthalmology are not impaired by dual freezing. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Lizenzbestimmungen: CC BY 4.0 Unported
Publikationstyp: Article
Publikationsstatus: publishedVersion
Erstveröffentlichung: 2020
Die Publikation erscheint in Sammlung(en):Fakultät für Maschinenbau

Verteilung der Downloads über den gewählten Zeitraum:

Herkunft der Downloads nach Ländern:

Pos. Land Downloads
Anzahl Proz.
1 image of flag of Germany Germany 37 55,22%
2 image of flag of United States United States 15 22,39%
3 image of flag of China China 5 7,46%
4 image of flag of No geo information available No geo information available 1 1,49%
5 image of flag of Ukraine Ukraine 1 1,49%
6 image of flag of Taiwan Taiwan 1 1,49%
7 image of flag of Russian Federation Russian Federation 1 1,49%
8 image of flag of Kazakhstan Kazakhstan 1 1,49%
9 image of flag of India India 1 1,49%
10 image of flag of Canada Canada 1 1,49%
    andere 3 4,48%

Weitere Download-Zahlen und Ranglisten:


Hinweis

Zur Erhebung der Downloadstatistiken kommen entsprechend dem „COUNTER Code of Practice for e-Resources“ international anerkannte Regeln und Normen zur Anwendung. COUNTER ist eine internationale Non-Profit-Organisation, in der Bibliotheksverbände, Datenbankanbieter und Verlage gemeinsam an Standards zur Erhebung, Speicherung und Verarbeitung von Nutzungsdaten elektronischer Ressourcen arbeiten, welche so Objektivität und Vergleichbarkeit gewährleisten sollen. Es werden hierbei ausschließlich Zugriffe auf die entsprechenden Volltexte ausgewertet, keine Aufrufe der Website an sich.