TY - JOUR
T1 - Induced Neural Differentiation of MMP-2 Cleaved (RADA)4 Drug Delivery Systems
AU - Koss, K.
AU - Tsui, C.
AU - Unsworth, L. D.
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/12/10
Y1 - 2016/12/10
N2 - (RADA)4 self-assembling peptides (SAPs) are promising for neural nanoscaffolds with on-demand drug delivery capabilities due to their automated synthesis, in-situ assembly, and potential for interaction with and release of biomolecules. Neuroinflammation cued on-demand drug release, due to up-regulated proteases, may well be vital in the treatment of several neurological diseases. In these conditions, releasing neurotrophic growth factors (NTFs) could potentially lead to neuroprotection and neurogenesis. As such, (RADA)4 was made with the high and low activity matrix metalloproteinase 2 (MMP-2) cleaved sequences, GPQG + IASQ (CP1) and GPQG + PAGQ (CP2), the brain-derived NTF secretion stimulating peptide MVG (DP1) and the ciliary NTF analogue DGGL (DP2). PC-12 cell culture was performed to assess bioactive substrate cell adhesion and NTF specific neuronal differentiation. The laminin-derived IKVAV peptide, known for neural cell attachment and interaction, was tethered to (RADA)4-IKVAV and mixed in increasing increments with (RADA)4 for this purpose. With 1 nanomolar MMP-2 treatment, product formation was observed to increase over a three day period, with (RADA)4/(RADA)4-CP1/CP2 mixture, however there was little difference between groups. Smaller CP1/CP2 concentrations displayed comparable (RADA)4 nanoscale morphology to higher concentrations. Acetylcholine esterase and neural differentiation was observed over 3 days with 1 nM MMP-2 treatment according to the following makeup: 8/1/1 (RADA)4/(RADA)4-IKVAV/(RADA)4-CP1/CP2-DP1/DP2. Signalling gradually increased in all groups, and neurite outgrowth was visible after three days.
AB - (RADA)4 self-assembling peptides (SAPs) are promising for neural nanoscaffolds with on-demand drug delivery capabilities due to their automated synthesis, in-situ assembly, and potential for interaction with and release of biomolecules. Neuroinflammation cued on-demand drug release, due to up-regulated proteases, may well be vital in the treatment of several neurological diseases. In these conditions, releasing neurotrophic growth factors (NTFs) could potentially lead to neuroprotection and neurogenesis. As such, (RADA)4 was made with the high and low activity matrix metalloproteinase 2 (MMP-2) cleaved sequences, GPQG + IASQ (CP1) and GPQG + PAGQ (CP2), the brain-derived NTF secretion stimulating peptide MVG (DP1) and the ciliary NTF analogue DGGL (DP2). PC-12 cell culture was performed to assess bioactive substrate cell adhesion and NTF specific neuronal differentiation. The laminin-derived IKVAV peptide, known for neural cell attachment and interaction, was tethered to (RADA)4-IKVAV and mixed in increasing increments with (RADA)4 for this purpose. With 1 nanomolar MMP-2 treatment, product formation was observed to increase over a three day period, with (RADA)4/(RADA)4-CP1/CP2 mixture, however there was little difference between groups. Smaller CP1/CP2 concentrations displayed comparable (RADA)4 nanoscale morphology to higher concentrations. Acetylcholine esterase and neural differentiation was observed over 3 days with 1 nM MMP-2 treatment according to the following makeup: 8/1/1 (RADA)4/(RADA)4-IKVAV/(RADA)4-CP1/CP2-DP1/DP2. Signalling gradually increased in all groups, and neurite outgrowth was visible after three days.
KW - (RADA)
KW - Drug Delivery
KW - MMP-2
KW - Nanoscaffold
KW - Neural Differentiation
KW - PC-12
KW - Self-assembling peptides
UR - https://www.scopus.com/pages/publications/84993989975
UR - https://www.scopus.com/inward/citedby.url?scp=84993989975&partnerID=8YFLogxK
U2 - 10.1016/j.jconrel.2016.09.037
DO - 10.1016/j.jconrel.2016.09.037
M3 - Article
C2 - 27720765
AN - SCOPUS:84993989975
SN - 0168-3659
VL - 243
SP - 204
EP - 213
JO - Journal of Controlled Release
JF - Journal of Controlled Release
ER -