Abstract
Direct application of amnion has greater risk of immunological rejection and infection. Decellularization is an effective method to lower the risk of immune complications and infections. The bioreactor assembly with multiple cassettes was designed for decellurization of multiple amnions with different cell types simultaneously in single run. A detergent-based protocol was modified to remove all cellular components from amnion and diminish the DNA content to render it non-immunogenic. Amnion (n = 10) were treated with 2% sodium dodecyl sulphate (SDS), 5% dimethyl sulfoxide (DMSO) and 2% sodium deoxycholeate (SD). Decellularized amnion samples were analyzed by haematoxylin–eosin staining (HE), Alcian blue pH 1 (AB-pH-1), 4,6-diamnionidino-2-phenylindol (DAPI), Massion’s trichrome stain, DNA quantification, mechanical testing and scanning electron microscopy (SEM). Histological analysis showed complete removal of cellular components and the histoarchitecture of scaffold remained intact. Amnion scaffold activated with platelet rich plasma (PRP) and calcium chloride composition supported better adherence to the wound than amnion alone. Only single application showed good healing. In vivo assessment of activated amnion revealed stable dressing. It has good promising outcome. At day 7, histologically the wounds treated with activated amnion were almost closed without scarring and showed well differentiated epidermis, proliferation of keratinocytes, hair follicles and basement membrane as compared to controls and silver nitrate gel dressings in a mouse (Mus musculus). Cryopreservation had no adverse effect on the mechanical properties of the amnion scaffold. Cryopreservation of decellularized amnion by Dulbecco’s modified eagle medium (DMEM) was expected to prepare off-the-shelf skin substitutes and preserve them to be immediately available upon request of patients’ needs.
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The inform consent were taken and the study was approved form Institutional Review Board (Ref.- 6/IAEC/2017). All animals experiments are performed after due approval from animal ethics committee of the university.
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Kshersagar, J., Kshirsagar, R., Desai, S. et al. Decellularized amnion scaffold with activated PRP: a new paradigm dressing material for burn wound healing. Cell Tissue Bank 19, 423–436 (2018). https://doi.org/10.1007/s10561-018-9688-z
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DOI: https://doi.org/10.1007/s10561-018-9688-z