Abstract
Cell-penetrating peptides (CPPs) are a group of short, membrane-permeable cationic peptides that represent a nonviral technology for delivering nanomaterials and macromolecules into live cells. In this study, two arginine-rich CPPs, HR9 and IR9, were found to be capable of entering rotifers. CPPs were able to efficiently deliver noncovalently associated with cargoes, including plasmid DNAs, red fluorescent proteins (RFPs), and semiconductor quantum dots, into rotifers. The functional reporter gene assay demonstrated that HR9-delivered plasmid DNAs containing the enhanced green fluorescent protein and RFP coding sequences could be actively expressed in rotifers. The 1-(4,5-dimethylthiazol-2-yl)-3,5-diphenylformazan assay further confirmed that CPP-mediated cargo delivery was not toxic to rotifers. Thus, these two CPPs hold a great potential for the delivery of exogenous genes, proteins, and nanoparticles in rotifers.
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Abbreviations
- CPPs:
-
Cell-penetrating peptides
- Cy3:
-
Cyanine 3
- DMSO:
-
Dimethyl sulfoxide
- dsRNA:
-
Double-stranded RNA
- EGFP:
-
Enhanced green fluorescent protein
- FITC:
-
Fluorescein isothiocyanate
- GFP:
-
Green fluorescent protein
- HA2:
-
Hemagglutinin-2
- 6His:
-
Hexa-histidine
- N/P:
-
Nitrogen/phosphate
- MTT:
-
1-(4,5-Dimethylthiazol-2-yl)-3,5-diphenylformazan
- QDs:
-
Quantum dots
- R9:
-
Nona-arginine
- RFP:
-
Red fluorescent protein
- siRNA:
-
Small interfering RNA
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Acknowledgments
We thank Roger Y. Tsien (University of California, San Diego, CA, USA) for provision of the mCherry plasmid, Goo-Young Kim and Hyangshuk Rhim (The Catholic University of Korea, Seoul, Korea) for the pCS2+ EGFP plasmid, Daniel Goldman (University of Michigan, Ann Arbor, MI, USA) for the pCS2+ DsRed plasmid, Chia-Wei Huang for the construction of the pCS2+ mCherry plasmid, Tze-Bin Chou (National Taiwan University, Taipei, Taiwan) and Core Instrument Center (National Health Research Institutes, Miaoli, Taiwan) for the Leica confocal systems, Institute of Cellular and Systems Medicine (National Health Research Institutes, Miaoli, Taiwan) for the Olympus microscope, and Robert S. Aronstam (Missouri University of Science and Technology, USA) for technical editing. This work was supported by Postdoctoral Fellowship NSC 101-2811-B-259-001 (to B.R.L.) and Grant Number NSC101-2311-B-259-003-MY3 (to H-J.L.) from the National Science Council of Taiwan.
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Liu, B.R., Liou, JS., Chen, YJ. et al. Delivery of Nucleic Acids, Proteins, and Nanoparticles by Arginine-Rich Cell-Penetrating Peptides in Rotifers. Mar Biotechnol 15, 584–595 (2013). https://doi.org/10.1007/s10126-013-9509-0
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DOI: https://doi.org/10.1007/s10126-013-9509-0