Abstract
Dermatological diseases including psoriasis, eczema, infections, and cancer collectively constitute a large category of human conditions. The large area and ease of access of skin open excellent opportunities for theranostic applications, that is, diagnosis as well as therapy of the disease. Such applications can be based on evaluation of skin’s molecular composition in terms of proteins, nucleic acids, and small molecules. Currently, however, such molecular information is not used in clinical practice. To bring this molecular information to routine clinical dermatology, it is essential to develop convenient and minimally invasive methods for rapid sampling molecules from skin. Here, we demonstrate an ultrasonic sampling technique that can recover a wide variety of biomolecules from skin in a minimally invasive manner. We show that ultrasound can retrieve nearly all major tissue constituents, including structural and functional proteins (cytokines, keratins, etc.), lipids (polar and non-polar lipids), and nucleic acids (DNA and RNA). Comparative analyses of skin’s molecular constituents obtained by ultrasonic sampling and skin homogenate showed high resemblance between the two biomolecular profiles, enabling us to build a unique molecular signature of skin. Using different mouse models of dermatological conditions, the ultrasonic analysis for changes in the molecular composition of skin confirmed specific regulation of several established biomarkers.
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Acknowledgments
We want to acknowledge Dr. Anubhav Arora and the staff at Animal Resource Center, UCSB, for help with in vivo protocols and experiments. We thank Dr. Raphael Simon for help in establishing with biochemical techniques used in this study. MO was partially supported by the JSPS (Japan Society for the Promotion of Science) Postdoctoral Fellowship for Research Abroad. This work was supported by TATRC.
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The authors Makoto Ogura and Sumit Paliwal made equal contributions to this study.
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Ogura, M., Paliwal, S. & Mitragotri, S. Sampling of disease biomarkers from skin for theranostic applications. Drug Deliv. and Transl. Res. 2, 87–94 (2012). https://doi.org/10.1007/s13346-012-0061-7
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DOI: https://doi.org/10.1007/s13346-012-0061-7